CN110743365B - Engine test bed tail gas treatment system and application method thereof - Google Patents
Engine test bed tail gas treatment system and application method thereof Download PDFInfo
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- CN110743365B CN110743365B CN201911161484.7A CN201911161484A CN110743365B CN 110743365 B CN110743365 B CN 110743365B CN 201911161484 A CN201911161484 A CN 201911161484A CN 110743365 B CN110743365 B CN 110743365B
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- 238000012360 testing method Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 419
- 239000007921 spray Substances 0.000 claims abstract description 284
- 239000003513 alkali Substances 0.000 claims abstract description 51
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 238000005507 spraying Methods 0.000 claims description 45
- 238000012856 packing Methods 0.000 claims description 31
- 239000000498 cooling water Substances 0.000 claims description 30
- 239000008213 purified water Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 11
- 239000010865 sewage Substances 0.000 claims description 11
- 239000002351 wastewater Substances 0.000 claims description 11
- 239000008399 tap water Substances 0.000 claims description 9
- 235000020679 tap water Nutrition 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000593 degrading effect Effects 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 68
- 238000010586 diagram Methods 0.000 description 5
- 239000012670 alkaline solution Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
- B01D53/526—Mixtures of hydrogen sulfide and carbon dioxide
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Treating Waste Gases (AREA)
Abstract
An engine test bed tail gas treatment system comprises a first alkali liquor spray tower, a second alkali liquor spray tower, a circulating water tank, a variable frequency diffuser, wastewater treatment equipment and a closed cooling tower; a mounting hole for mounting a variable-frequency diffuser is formed in one side surface of the circulating water tank, the variable-frequency diffuser passes through the mounting hole and is horizontally and fixedly mounted in the circulating water tank, alkaline circulating water is filled in the circulating water tank, and the variable-frequency diffuser is positioned above the alkaline circulating water; according to the tail gas treatment system of the engine test bed and the application method thereof, disclosed by the invention, the tail gas of the engine test bed is treated by arranging the closed circulating water pool and the 2 sets of alkaline spray tables, so that the gas discharged from the gas outlet of the alkaline spray tower meets the national pollutant emission standard.
Description
Technical Field
The invention relates to the technical field of engine test environmental protection, in particular to an engine test bed tail gas treatment system and a use method thereof.
Background
The engine test is one of the necessary links of throwing and using the aerospace engines such as turbofan engines, solid-flushing engines and the like, the engine test bed is a necessary condition of the engine test, the main components of the discharged gas are carbon dioxide and hydrogen sulfide and contain certain particulate matters, the particulate matters mainly comprise diboron trioxide and magnesium oxide, the exhaust gas discharged by the test bed can be greatly polluted to the atmosphere if directly discharged into the atmosphere, acid rain is generated, and meanwhile, the discharged particulate matters can form pollutants such as PM10, PM2.5 and the like to pollute the atmosphere, so that the engine test bed is extremely not environment-friendly, and in the prior art, no mature and effective method is provided for treating the tail gas of the engine test bed of the aerospace engines such as the turbofan engines, the solid-flushing engines and the like.
Disclosure of Invention
The technical solution of the invention is as follows: overcomes the defects of the prior art and provides an engine test bed tail gas treatment system and a use method thereof.
The technical scheme of the invention is as follows: an engine test bed tail gas treatment system comprises a first alkali liquor spray tower, a second alkali liquor spray tower, a circulating water tank, a variable frequency diffuser, wastewater treatment equipment and a closed cooling tower; a mounting hole for mounting a variable-frequency diffuser is formed in one side surface of the circulating water tank, the variable-frequency diffuser passes through the mounting hole and is horizontally and fixedly mounted in the circulating water tank, alkaline circulating water is filled in the circulating water tank, and the variable-frequency diffuser is positioned above the alkaline circulating water;
the first alkali liquor spray tower and the second alkali liquor spray tower have the same structure and are fixedly arranged on the upper surface of the circulating water tank, and the spray tower air inlets of the first alkali liquor spray tower and the second alkali liquor spray tower are communicated with the air outlet of the circulating water tank, which is positioned above the alkaline circulating water level and used for discharging the tail gas of the engine test bed discharged by the variable frequency diffuser, through pipelines;
The wastewater treatment equipment is fixedly arranged on the upper surface of the circulating water tank, a wastewater inlet of the wastewater treatment equipment is communicated with a spray tower drain outlet of the first alkali liquor spray tower and a spray tower drain outlet of the second alkali liquor spray tower through pipelines, a water outlet of the wastewater treatment equipment is communicated with a water inlet of the circulating water tank, which is positioned above an alkaline circulating water level, for introducing purified water, through pipelines, and a valve is arranged at the water inlet of the circulating water tank, which is positioned above the alkaline circulating water level, for introducing purified water;
The closed cooling tower is fixedly arranged on the upper surface of the circulating water tank, the water inlet of the closed cooling tower is communicated with the water outlet of the circulating water tank, which is positioned below the alkaline circulating water level and used for guiding out alkaline circulating water, the water outlet of the closed cooling tower is communicated with the cooling water inlet of the circulating water tank, which is positioned above the alkaline circulating water level and used for guiding in cooling water, through the pipeline, and the water outlet of the circulating water tank, which is positioned above the alkaline circulating water level and used for guiding out alkaline circulating water, is provided with a valve.
Further, the first alkali liquor spray tower comprises a spray tower body, a spray tower air inlet, a spray tower air outlet, a spray tower alkali liquor input port, a spray tower first packing layer, a spray tower first spray system, a spray tower second packing layer, a spray tower second spray system, a spray tower liquid level meter, a spray tower circulating pump, a spray tower overflow port, a spray tower drain port and a spray tower maintenance port; the spray tower body is of a hollow cylinder structure, the spray tower air inlet, the spray tower alkali liquor input port, the spray tower overflow port, the spray tower drain port and the spray tower maintenance port are all arranged on the side part of the spray tower body, and the spray tower air outlet is arranged on the top of the spray tower body; the system comprises a circulating water tank, a variable-frequency diffuser, a spray tower air outlet, a spray tower alkali liquor inlet, a spray tower circulating pump, a spray tower first spraying system and a spray tower second spraying system, wherein the spray tower air inlet is communicated with the exhaust outlet of the circulating water tank, which is positioned above the alkaline circulating water level, and is used for exhausting engine test bed tail gas exhausted by the variable-frequency diffuser; an alkaline circulating water conveying port of the circulating water tank, which is positioned below the alkaline circulating water level and used for conveying alkaline circulating water, is provided with a valve, the setting position of a spray tower overflow port is higher than that of a spray tower air inlet, a spray tower alkali liquor input port and a spray tower drain port, and the spray tower drain port is communicated with a wastewater inlet of wastewater treatment equipment through a pipeline; along the axis of the spray tower body, a spray tower first packing layer, a spray tower first spraying system, a spray tower second packing layer and a spray tower second spraying system are fixedly installed in the spray tower body from bottom to top in sequence, and a spray tower liquid level meter is arranged on the side part of the spray tower body and is positioned on the lower part of the spray tower first packing layer and used for monitoring the water level of wastewater at the bottom of the spray tower body.
Further, the variable frequency diffuser comprises a variable frequency diffuser cylinder body and a variable frequency diffuser guide cone, the variable frequency diffuser cylinder body is a hollow circular cylinder body, a plurality of variable frequency diffuser air outlet holes for discharging gas are formed in the surface of the cylinder body, and the variable frequency diffuser air outlet holes are through holes penetrating through the circular cylinder body; the variable frequency diffuser guide cone is cone-shaped, the conical surface of the variable frequency diffuser guide cone is arranged inside the circular cylinder, the diameter of the bottom excircle of the variable frequency diffuser guide cone is the same as the inner diameter of the circular cylinder, the bottom excircle of the variable frequency diffuser guide cone is fixedly connected with one end face of the circular cylinder, and one end of the variable frequency diffuser cylinder is sealed.
Further, the circulating water tank is provided with a water filling port for filling municipal tap water.
Further, the circulating water tank is provided with a drain port which is discharged into the sewage treatment system.
Further, a detector for detecting the pH value of the alkaline circulating water in the circulating water tank, a thermometer for detecting the alkaline circulating water in the circulating water tank and a liquid level meter for displaying the level of the alkaline circulating water in the circulating water tank are arranged in the circulating water tank.
Further, the circulating water tank is provided with a feeding port for feeding alkaline materials, so that the pH value of alkaline circulating water in the circulating water tank is ensured to reach a preset value.
The method for treating the tail gas of the engine test bed by using the tail gas treatment system of the engine test bed comprises the following steps of:
s100), starting a spraying system
S110), a valve is arranged at a water inlet which is arranged above the alkaline circulating water level and used for introducing purified water and is kept to be arranged in the circulating water tank, a valve which is arranged at a cooling water inlet which is arranged above the alkaline circulating water level and used for introducing cooling water and is arranged at a water outlet which is arranged below the alkaline circulating water and used for leading out alkaline circulating water is closed, and a valve which is arranged at an alkaline circulating water conveying port which is arranged below the alkaline circulating water level and is used for conveying alkaline circulating water and is arranged in the circulating water tank is opened;
s120), starting a spray tower circulating pump to pump alkaline circulating water in a circulating water tank, conveying the alkaline circulating water to a first spray system of a spray tower and a second spray system of the spray tower through a conveying pipeline for conveying the alkaline circulating water to the spray systems, starting the first spray system and the second spray system of the spray tower, starting the alkaline circulating water to spray, and keeping the spray tower circulating pump, wherein the first spray system and the second spray system of the spray tower work;
S200, tail gas treatment
S210), engine test, wherein the tail gas of the engine test bed is discharged by an exhaust system (the exhaust system can be an exhaust pipeline, an ejector and the like), enters from the end surface of one end of the opening of the variable frequency diffuser cylinder, is guided by a guide cone of the variable frequency diffuser, is discharged by a plurality of air outlets of the variable frequency diffuser, and enters into a first alkali liquor spray tower respectively through a pipeline which is communicated with a circulating water tank and is positioned above an alkaline circulating water level and used for discharging the tail gas of the engine test bed discharged by the variable frequency diffuser and a spray tower air inlet;
s220), enabling the tail gas of the engine test bed entering the air inlet of the spray tower to sequentially pass through a first packing layer of the spray tower and a second packing layer of the spray tower and then be discharged from an air outlet of the spray tower, and degrading the alkaline circulating water and the tail gas of the engine test bed when the tail gas of the engine test bed passes through the first packing layer of the spray tower and the second packing layer of the spray tower;
S300) closing the spraying system
After the engine test is finished, closing a circulating pump of the spray tower after the time reaches a preset time, preferably 2-4 hours, further preferably 3 hours after the test is finished, and closing a valve arranged at an alkaline circulating water conveying port of a circulating water tank and positioned below an alkaline circulating water level after a first spray system and a second spray system of the spray tower;
S400), wastewater treatment
S410), a valve which is positioned at a cooling water inlet above an alkaline circulating water level and is used for introducing cooling water, a valve which is positioned at a water outlet below the alkaline circulating water level and is used for guiding out alkaline circulating water, and a valve which is arranged at an alkaline circulating water conveying port below the alkaline circulating water level and is used for conveying alkaline circulating water are kept closed, a valve which is arranged at a water inlet above the alkaline circulating water level and is used for introducing purified water and a spray tower drain outlet are opened, the wastewater treatment equipment is started, and sewage in the first alkaline liquid spray tower and the second alkaline liquid spray tower is discharged through the spray tower drain outlet and enters the wastewater treatment equipment for purification treatment, and then enters the water outlet of the wastewater treatment equipment through a pipeline and enters the water inlet above the alkaline circulating water level and then flows into the circulating water tank;
S420), after no sewage is displayed in the first alkali liquor spray tower and the second alkali liquor spray tower through a spray tower liquid level meter, respectively closing a valve and a spray tower drain outlet which are arranged at a water inlet of a circulating water tank and above an alkaline circulating water level and used for introducing purified water after the wastewater treatment equipment is closed;
S500), cooling alkaline circulating water
S510), a valve arranged at a water inlet of the circulating water tank and used for introducing purified water above an alkaline circulating water level and a valve arranged at an alkaline circulating water conveying port of the circulating water tank and used for conveying alkaline circulating water below the alkaline circulating water level are kept closed, a valve arranged at a cooling water inlet of the circulating water tank and used for introducing cooling water above the alkaline circulating water level and a valve arranged at a water outlet of the circulating water tank and used for guiding out alkaline circulating water below the alkaline circulating water level are opened, a closed cooling tower is started, alkaline circulating water in the circulating water tank enters the closed cooling tower through a water outlet of the circulating water tank and used for guiding out alkaline circulating water below the alkaline circulating water level to be cooled, and then the temperature of the alkaline circulating water in the circulating water tank is displayed to be not higher than a preset value through a thermometer which is arranged above the alkaline circulating water level and used for introducing the cooling water into the circulating water tank until the alkaline circulating water in the circulating water tank is detected, and the preset value is preferably 30 ℃.
Further, after the engine test, alkaline materials are put in through a feed port arranged in the circulating water tank and used for putting alkaline materials, so that the pH value of alkaline circulating water in the circulating water tank reaches a preset value.
Further, when the alkaline circulating water level in the circulating water tank is lower than a preset value, tap water is injected through a water injection port for injecting municipal tap water, which is arranged in the circulating water tank.
Compared with the prior art, the invention has the advantages that:
1. According to the tail gas treatment system of the engine test bed and the application method thereof, disclosed by the invention, the treatment of the tail gas of the engine test bed is realized by arranging the closed circulating water tank and 2 sets of alkaline spray tables, so that the gas discharged from the gas outlet of the alkaline spray tower meets the national pollutant emission standard, and 2 sets of alkaline spray tables connected in parallel are arranged, so that the tail gas of the engine test bed is divided into 2 paths for alkaline spray, the flow rate of the tail gas of the engine test bed passing through the alkaline spray towers is reduced, the alkaline spray process is more complete, the workload of each alkaline spray tower is reduced, and the alkaline spray is further fully performed.
2. According to the tail gas treatment system of the engine test bed and the application method thereof, the variable frequency diffuser is creatively arranged in the closed circulating water tank, the gas containing volume in the circulating water tank is larger than the volume of the variable frequency diffuser, so that the tail gas discharged by the engine test bed is buffered once in the closed circulating water tank, the flow rate of the tail gas of the engine test bed is reduced, and alkaline spraying is fully performed when the gas subsequently enters the alkaline spraying tower.
3. According to the tail gas treatment system of the engine test bed and the application method thereof, the cone-shaped variable-frequency diffuser diversion cone is arranged in the variable-frequency diffuser, so that gas entering the variable-frequency diffuser cylinder is diverted, the gas entering the variable-frequency diffuser cylinder is uniformly discharged from the plurality of variable-frequency diffuser gas outlet holes, the gas containing volume in the circulating water pool can be uniformly filled, and the buffering and subsequent alkaline spraying of the gas are facilitated.
4. According to the engine test bed tail gas treatment system and the application method thereof, 2 layers of spraying systems are creatively arranged in each alkaline spraying tower, so that spraying is more thorough.
5. According to the tail gas treatment system of the engine test bed and the application method thereof, the filler layer filled with the ceramic material is arranged in each layer of spraying system, so that the treatment capacity of the alkaline spraying tower is greatly improved.
6. According to the tail gas treatment system of the engine test bed and the application method thereof, the circulating water tank, the waste water treatment equipment and the closed cooling tower are arranged, so that the alkaline circulating water is recycled, and the test cost is greatly reduced.
Drawings
Fig. 1 is a schematic diagram of the exhaust gas treatment system of the engine test stand of the present invention.
Fig. 2 is a schematic structural view showing the internal structure of an engine test stand exhaust gas treatment system according to the present invention.
FIG. 3 is a schematic diagram of the structure of an alkali liquor spray tower in the engine test bed tail gas treatment system of the invention.
Fig. 4 is a schematic structural diagram of a variable frequency diffuser in an angular direction in the exhaust gas treatment system of the engine test stand of the present invention.
Fig. 5 is a schematic structural diagram of a variable frequency diffuser in another angular direction in the exhaust gas treatment system of the engine test stand of the present invention.
FIG. 6 is a schematic diagram of the flow guide cone of the variable frequency diffuser in the exhaust gas treatment system of the engine test stand according to the present invention.
Detailed Description
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "abutting" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
An engine test bed tail gas treatment system, in particular to an aerospace engine test bed tail gas treatment system of a turbofan engine, a solid flushing engine and the like, which comprises a first alkali liquor spray tower 100, a second alkali liquor spray tower 200, a circulating water tank 300, a variable frequency diffuser 400, wastewater treatment equipment 500 and a closed cooling tower 600.
The circulating water tank 300 is of a closed reinforced concrete structure, a mounting hole for mounting the variable frequency diffuser 400 is formed in one side face of the circulating water tank 300, the variable frequency diffuser 400 penetrates through the mounting hole and then is horizontally and fixedly mounted in the circulating water tank 300, alkaline circulating water is filled in the circulating water tank 300, and the variable frequency diffuser 400 is located above the alkaline circulating water.
The first alkali liquor spray tower 100 and the second alkali liquor spray tower 200 have the same structure, and are fixedly installed on the upper surface of the circulating water tank 300, and the spray tower air inlets 102 of the first alkali liquor spray tower 100 and the second alkali liquor spray tower 200 are communicated with an air outlet (not shown in the figure) of the circulating water tank 300, which is positioned above the alkaline circulating water level and is used for discharging the tail gas of the engine test bed discharged by the variable frequency diffuser 400, through pipelines.
The wastewater treatment apparatus 500 is in the prior art, and is fixedly installed on the upper surface of the circulating water tank 300, and the wastewater inlet (not shown in the figure) of the wastewater treatment apparatus 500 is in communication with the spray tower drain 112 of the first alkaline solution spray tower 100 and the second alkaline solution spray tower 200 through a pipeline, and the water outlet (not shown in the figure) of the wastewater treatment apparatus 500 is in communication with the water inlet (not shown in the figure) of the circulating water tank 300, which is positioned above the alkaline circulating water level, for introducing purified water, and the wastewater discharged from the spray tower drain 112 of the first alkaline solution spray tower 100 and the second alkaline solution spray tower 200 enters the circulating water tank 300 through the water inlet of the circulating water tank 300 through the pipeline after the wastewater treatment apparatus 500 is purified. Preferably, a valve is disposed at a water inlet of the circulating water tank 300 above the alkaline circulating water level for introducing purified water, and is closed when engine test bed exhaust is processed into the circulating water tank 300, and is opened when no engine test bed exhaust is present in the circulating water tank 300 and the wastewater treatment apparatus 500 is operated.
The closed cooling tower 600 is in the prior art, and is fixedly installed on the upper surface of the circulating water tank 300, and a water inlet (not shown in the figure) of the closed cooling tower 600 is communicated with a water outlet (not shown in the figure) of the circulating water tank 300, which is positioned below the alkaline circulating water level and is used for guiding out the alkaline circulating water, through a pipeline, a water outlet (not shown in the figure) of the closed cooling tower 600 is communicated with a cooling water inlet (not shown in the figure) of the circulating water tank 300, which is positioned above the alkaline circulating water level and is used for guiding in the cooling water, the alkaline circulating water in the circulating water tank 300 enters the water inlet of the closed cooling tower 600 through a pipeline, is cooled by the closed cooling tower 600, and is discharged from the water outlet for guiding out the alkaline circulating water through the pipeline, and enters the circulating water tank 300 through the cooling water inlet (not shown in the figure) which is positioned above the alkaline circulating water level and is used for guiding in the cooling water. Preferably, valves are provided at a cooling water inlet for introducing cooling water above the alkaline circulating water level of the circulating water tank 300 and at a water outlet for guiding out the alkaline circulating water below the alkaline circulating water level, and when the engine test bed exhaust gas enters the circulating water tank 300, the valves are closed, and when the engine test bed exhaust gas does not exist in the circulating water tank 300 and the cooling water inlet for cooling water works, the valves are opened.
Preferably, the circulation tank 300 is provided with a water filling port into which municipal tap water is filled.
Preferably, the circulating water reservoir 300 is provided with a drain port to be discharged into a sewage treatment system.
Preferably, a detector for detecting the ph value of the alkaline circulating water in the circulating water tank 300, a thermometer for detecting the alkaline circulating water in the circulating water tank 300 and a level gauge for displaying the level of the alkaline circulating water in the circulating water tank 300 are arranged in the circulating water tank 300.
Preferably, the circulating water tank 300 is provided with a feeding port for feeding alkaline materials, so as to ensure that the pH value of alkaline circulating water in the circulating water tank 300 reaches a preset value.
Preferably, the gas containing volume in the circulating water tank 300 is greater than the volume 400 of the variable frequency diffuser, and preferably, the gas containing volume in the circulating water tank 300 is 10 times the volume 400 of the variable frequency diffuser.
The first alkali liquor spray tower 100 comprises a spray tower body 101, a spray tower air inlet 102, a spray tower air outlet 103, a spray tower alkali liquor input port 104, a spray tower first packing layer 105, a spray tower first spray system 106, a spray tower second packing layer 107, a spray tower second spray system 108, a spray tower liquid level meter 109, a spray tower circulating pump 110, a spray tower overflow port 111, a spray tower drain port 112 and a spray tower maintenance port 113; the spray tower body 101 is of a hollow cylinder structure, the spray tower air inlet 102, the spray tower alkali liquor input port 104, the spray tower overflow port 111, the spray tower drain port 112 and the spray tower maintenance port 113 are all arranged on the side part of the spray tower body 101, and the spray tower air outlet 103 is arranged on the top of the spray tower body 101; the spray tower air inlet 102 is communicated with an air outlet of the circulating water tank 300, which is positioned above the alkaline circulating water level and is used for discharging the tail gas of the engine test bed discharged by the variable frequency diffuser 400, the spray tower air outlet 103 is communicated with the external atmosphere, one end of a conveying pipeline for conveying alkaline circulating water to the spray system is communicated with an alkaline circulating water conveying port of the circulating water tank 300, which is positioned below the alkaline circulating water level and is used for conveying alkaline circulating water, the other end of the conveying pipeline passes through the spray tower alkaline liquid input port 104 and is respectively communicated with the spray tower first spray system 106 and the spray tower second spray system 108, the spray tower circulating pump 110 is arranged outside the spray tower body 101, for pumping the alkaline circulating water in the circulating water tank 300 to the first spray system 106 of the spray tower and the second spray system 108 of the spray tower through a conveying pipeline for conveying the alkaline circulating water to the spray systems; preferably, a valve is arranged at an alkaline circulating water delivery port of the circulating water tank 300, which is positioned below the alkaline circulating water level and is used for delivering alkaline circulating water, and is opened when engine test bed exhaust gas is treated and enters the circulating water tank 300, and is closed when no engine test bed exhaust gas exists in the circulating water tank 300; further preferably, a seal is arranged at the position that the conveying pipeline for conveying alkaline circulating water to the spraying system passes through the spraying tower alkali liquor input port 104; the spray tower overflow port 111 is arranged at a position higher than the spray tower air inlet 102, the spray tower alkali liquor inlet 104 and the spray tower drain 112, and the spray tower drain 112 is communicated with the wastewater inlet of the wastewater treatment equipment 500 through a pipeline. Along the axis of the spray tower body 101, a spray tower first packing layer 105, a spray tower first spraying system 106, a spray tower second packing layer 107 and a spray tower second spraying system 108 are fixedly installed inside the spray tower body 101 from bottom to top in sequence, and preferably, the packing in the spray tower first packing layer 105 and the spray tower second packing layer 107 is ceramic packing. The spray tower liquid level meter is arranged on the side part of the spray tower body 101 and is positioned on the lower part of the first packing layer 105 of the spray tower, and is used for monitoring the water level of wastewater at the bottom of the spray tower body 101.
The variable frequency diffuser 400 comprises a variable frequency diffuser barrel 410 and a variable frequency diffuser guide cone 430, wherein the variable frequency diffuser barrel 410 is a hollow circular barrel, a plurality of variable frequency diffuser air outlet holes 420 for exhausting gas are arranged on the surface of the barrel, and the variable frequency diffuser air outlet holes 420 are through holes penetrating through the circular barrel; the variable frequency diffuser guide cone 430 is of a conical shape, the conical surface of the variable frequency diffuser guide cone 430 is arranged inside the circular cylinder, the diameter of the bottom outer circle of the variable frequency diffuser guide cone 430 is the same as the inner diameter of the circular cylinder, the bottom outer circle of the variable frequency diffuser guide cone 430 is fixedly connected with one end face of the circular cylinder, one end of the variable frequency diffuser cylinder 410 is sealed, tail gas exhausted by an engine test bench enters from the end face of the opening end of the variable frequency diffuser cylinder 410, is guided by the variable frequency diffuser guide cone 430 and is exhausted by a plurality of variable frequency diffuser air outlets 420, and gas entering the variable frequency diffuser cylinder 410 is guided by the variable frequency diffuser guide cone 430 of the conical shape, so that the gas entering the variable frequency diffuser cylinder 410 is exhausted uniformly from the plurality of variable frequency diffuser air outlets 420, the subsequent tail gas treatment is facilitated, and the tail gas treatment capability of equipment is improved.
The method for treating the tail gas of the engine test bed by using the tail gas treatment system of the engine test bed comprises the following steps:
s100), starting a spraying system
S110), a valve is arranged at the water inlet of the circulating water tank 300 above the alkaline circulating water level for introducing purified water, a valve at the cooling water inlet of the alkaline circulating water level for introducing cooling water and at the water outlet of the alkaline circulating water level for guiding out alkaline circulating water is closed, and a valve at the alkaline circulating water conveying port of the circulating water tank 300 below the alkaline circulating water level for conveying alkaline circulating water is opened.
S120), starting a spray tower circulating pump 110 to pump out alkaline circulating water in the circulating water tank 300, conveying the alkaline circulating water to a spray tower first spray system 106 and a spray tower second spray system 108 through conveying pipelines for conveying the alkaline circulating water to the spray systems, starting the first spray system 106 and the spray tower second spray system 108, and starting spraying of the alkaline circulating water to keep the spray tower circulating pump 110, wherein the first spray system 106 and the spray tower second spray system 108 work.
S200, tail gas treatment
S210), and the tail gas of the engine test bed is discharged by an exhaust system (the exhaust system can be an exhaust pipeline, an ejector, etc.), enters from the end surface of the open end of the variable frequency diffuser cylinder 410, is guided by the variable frequency diffuser guide cone 430, is discharged by the plurality of variable frequency diffuser air outlet holes 420, and then enters into the first alkali lye spray tower 100 and the spray tower air inlet 102 of the second alkali lye spray tower 200 respectively through the pipeline which is communicated with the exhaust port of the engine test bed tail gas discharged by the variable frequency diffuser 400 and the spray tower air inlet 102 above the alkaline circulating water level.
S220), engine test bed tail gas entering the spray tower air inlet 102 sequentially passes through the spray tower first packing layer 105 and the spray tower second packing layer 107 and then is discharged from the spray tower air outlet 103, and when the engine test bed tail gas passes through the spray tower first packing layer 105 and the spray tower second packing layer 107, alkaline circulating water and the engine test bed tail gas are degraded.
S300) closing the spraying system
After the engine test is finished, the valve arranged at the alkaline circulating water conveying port of the circulating water pond 300 and positioned below the alkaline circulating water level is closed after the time reaches a preset time, preferably 2-4 hours, more preferably 3 hours after the test is finished, the circulating pump 110 of the spray tower is closed, and the first spraying system 106 and the second spraying system 108 of the spray tower are closed.
S400), wastewater treatment
S410), a valve which is arranged at a cooling water inlet above an alkaline circulating water level and a water outlet which is arranged below the alkaline circulating water level and used for guiding out alkaline circulating water, and a valve which is arranged at an alkaline circulating water conveying port of the circulating water tank 300 and used for conveying alkaline circulating water are kept closed, a valve which is arranged at a water inlet of the circulating water tank 300 and used for guiding in purified water is opened, a spray tower drain 112 is opened, the wastewater treatment device 500 is started, and the wastewater in the first alkaline spray tower 100 and the second alkaline spray tower 200 is discharged through the spray tower drain 112 and enters the wastewater treatment device 500, and then enters the water outlet of the wastewater treatment device 500 through a pipeline and enters the water inlet of the circulating water tank 300 and used for guiding in purified water above the alkaline circulating water level.
S420), after the first alkali liquor spray tower 100 and the second alkali liquor spray tower 200 are displayed by the spray tower liquid level meter 109 to be free of sewage, the valve arranged at the water inlet of the circulating water tank 300 above the alkaline circulating water level and used for introducing purified water and the spray tower drain 112 are respectively closed after the wastewater treatment equipment 500 is closed.
S500), cooling alkaline circulating water
S510), holding the valve provided at the inlet for introducing purified water above the alkaline circulation water level of the circulation water tank 300 and the valve provided at the alkaline circulation water delivery port for delivering alkaline circulation water below the alkaline circulation water level of the circulation water tank 300 closed, opening the valve provided at the cooling water inlet for introducing cooling water above the alkaline circulation water level and the valve provided at the outlet for introducing alkaline circulation water below the alkaline circulation water level, starting the closed cooling tower 600, and after the alkaline circulation water in the circulation water tank 300 is cooled by the outlet for introducing alkaline circulation water below the alkaline circulation water level into the closed cooling tower 600, displaying that the temperature of the alkaline circulation water in the circulation water tank 300 is not higher than a predetermined value, preferably, the predetermined value is 30 ℃ by the thermometer for detecting the alkaline circulation water in the circulation water tank 300.
Preferably, after each engine test, the alkaline material is put in through a feed port for putting in the alkaline material, which is provided in the circulating water tank 300, so that the ph of the alkaline circulating water in the circulating water tank 300 reaches a predetermined value.
Preferably, when the alkaline circulating water level in the circulating water tank 300 is lower than a predetermined value, the tap water is injected through a water injection port provided in the circulating water tank 300 for injecting the municipal tap water, and preferably, the predetermined value is 2/3 of the depth of the circulating water tank 300.
Preferably, the alkaline circulating water in the circulating water tank 300 is discharged into the sewage treatment system through a drain port provided in the circulating water tank 300 and discharged into the sewage treatment system for a predetermined period, preferably, for 3 months.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The method is characterized in that an engine test bed tail gas treatment system is adopted and comprises a first alkali liquor spray tower, a second alkali liquor spray tower, a circulating water tank, a variable frequency diffuser, wastewater treatment equipment and a closed cooling tower;
A mounting hole for mounting a variable-frequency diffuser is formed in one side surface of the circulating water tank, the variable-frequency diffuser passes through the mounting hole and is horizontally and fixedly mounted in the circulating water tank, alkaline circulating water is filled in the circulating water tank, and the variable-frequency diffuser is positioned above the alkaline circulating water;
the first alkali liquor spray tower and the second alkali liquor spray tower have the same structure and are fixedly arranged on the upper surface of the circulating water tank, and the spray tower air inlets of the first alkali liquor spray tower and the second alkali liquor spray tower are communicated with the air outlet of the circulating water tank, which is positioned above the alkaline circulating water level and used for discharging the tail gas of the engine test bed discharged by the variable frequency diffuser, through pipelines;
The wastewater treatment equipment is fixedly arranged on the upper surface of the circulating water tank, a wastewater inlet of the wastewater treatment equipment is communicated with a spray tower drain outlet of the first alkali liquor spray tower and a spray tower drain outlet of the second alkali liquor spray tower through pipelines, a water outlet of the wastewater treatment equipment is communicated with a water inlet of the circulating water tank, which is positioned above an alkaline circulating water level, for introducing purified water, through pipelines, and a valve is arranged at the water inlet of the circulating water tank, which is positioned above the alkaline circulating water level, for introducing purified water;
The closed cooling tower is fixedly arranged on the upper surface of the circulating water tank, the water inlet of the closed cooling tower is communicated with the water outlet of the circulating water tank, which is positioned below the alkaline circulating water level and used for guiding out alkaline circulating water, the water outlet of the closed cooling tower is communicated with the cooling water inlet of the circulating water tank, which is positioned above the alkaline circulating water level and used for guiding in cooling water, through the pipeline, and the water outlet of the circulating water tank, which is positioned above the alkaline circulating water level and used for guiding out alkaline circulating water, is provided with valves;
The variable frequency diffuser comprises a variable frequency diffuser cylinder body and a variable frequency diffuser guide cone, the variable frequency diffuser cylinder body is a hollow circular cylinder body, a plurality of variable frequency diffuser air outlet holes for exhausting gas are formed in the surface of the cylinder body, and the variable frequency diffuser air outlet holes are through holes penetrating through the circular cylinder body; the variable-frequency diffuser flow guide cone is cone-shaped, the conical surface of the variable-frequency diffuser flow guide cone is arranged inside the circular cylinder, the diameter of the bottom outer circle of the variable-frequency diffuser flow guide cone is the same as the inner diameter of the circular cylinder, the bottom outer circle of the variable-frequency diffuser flow guide cone is fixedly connected with one end face of the circular cylinder, and one end of the variable-frequency diffuser cylinder is closed;
the tail gas treatment method of the engine test bed comprises the following steps:
s100), starting a spraying system
S110), a valve is arranged at a water inlet which is arranged above the alkaline circulating water level and used for introducing purified water and is kept to be arranged in the circulating water tank, a valve which is arranged at a cooling water inlet which is arranged above the alkaline circulating water level and used for introducing cooling water and is arranged at a water outlet which is arranged below the alkaline circulating water and used for leading out alkaline circulating water is closed, and a valve which is arranged at an alkaline circulating water conveying port which is arranged below the alkaline circulating water level and is used for conveying alkaline circulating water and is arranged in the circulating water tank is opened;
s120), starting a spray tower circulating pump to pump alkaline circulating water in a circulating water tank, conveying the alkaline circulating water to a first spray system of a spray tower and a second spray system of the spray tower through a conveying pipeline for conveying the alkaline circulating water to the spray systems, starting the first spray system and the second spray system of the spray tower, starting the alkaline circulating water to spray, and keeping the spray tower circulating pump, wherein the first spray system and the second spray system of the spray tower work;
S200, tail gas treatment
S210), engine test bed tail gas is discharged from an exhaust system, enters from the end face of one end of an opening of a variable frequency diffuser cylinder, is guided by a variable frequency diffuser guide cone, is discharged from a plurality of variable frequency diffuser air outlets, and enters into a first alkali liquor spray tower respectively through a pipeline which is communicated with a circulating water tank and is positioned above an alkaline circulating water level and used for discharging an exhaust port of the engine test bed tail gas discharged by the variable frequency diffuser and a spray tower air inlet, and a spray tower air inlet of a second alkali liquor spray tower;
s220), enabling the tail gas of the engine test bed entering the air inlet of the spray tower to sequentially pass through a first packing layer of the spray tower and a second packing layer of the spray tower and then be discharged from an air outlet of the spray tower, and degrading the alkaline circulating water and the tail gas of the engine test bed when the tail gas of the engine test bed passes through the first packing layer of the spray tower and the second packing layer of the spray tower;
S300) closing the spraying system
After the engine test is finished, when the time reaches the preset time which is 2-4 hours after the test is finished, a circulating pump of the spray tower is closed, and a valve arranged at an alkaline circulating water conveying port of a circulating water tank and positioned below an alkaline circulating water level is closed after a first spray system and a second spray system of the spray tower;
S400), wastewater treatment
S410), a valve which is positioned at a cooling water inlet above an alkaline circulating water level and is used for introducing cooling water, a valve which is positioned at a water outlet below the alkaline circulating water level and is used for guiding out alkaline circulating water, and a valve which is arranged at an alkaline circulating water conveying port below the alkaline circulating water level and is used for conveying alkaline circulating water are kept closed, a valve which is arranged at a water inlet above the alkaline circulating water level and is used for introducing purified water and a spray tower drain outlet are opened, the wastewater treatment equipment is started, and sewage in the first alkaline liquid spray tower and the second alkaline liquid spray tower is discharged through the spray tower drain outlet and enters the wastewater treatment equipment for purification treatment, and then enters the water outlet of the wastewater treatment equipment through a pipeline and enters the water inlet above the alkaline circulating water level and then flows into the circulating water tank;
S420), after no sewage is displayed in the first alkali liquor spray tower and the second alkali liquor spray tower through a spray tower liquid level meter, respectively closing a valve and a spray tower drain outlet which are arranged at a water inlet of a circulating water tank and above an alkaline circulating water level and used for introducing purified water after the wastewater treatment equipment is closed;
S500), cooling alkaline circulating water
S510), a valve arranged at a water inlet of the circulating water tank and used for introducing purified water is kept closed, a valve arranged at a water inlet of the circulating water tank and used for conveying alkaline circulating water is kept closed, a valve arranged at a water inlet of the circulating water tank and used for introducing cooling water is opened, a valve arranged at a water inlet of the circulating water tank and used for guiding out alkaline circulating water is opened, the valve is started, alkaline circulating water in the circulating water tank enters the closed cooling tower through a water outlet of the circulating water tank and used for guiding out alkaline circulating water, and after the alkaline circulating water enters the circulating water tank through a thermometer, the thermometer is arranged at the water inlet of the circulating water tank and used for introducing cooling water, and the thermometer is used for detecting the alkaline circulating water in the circulating water tank, the temperature of the alkaline circulating water in the circulating water tank is not higher than a preset value.
2. The engine test stand exhaust gas treatment method according to claim 1, wherein: the first alkali liquor spraying tower comprises a spraying tower body, a spraying tower air inlet, a spraying tower air outlet, a spraying tower alkali liquor input port, a spraying tower first packing layer, a spraying tower first spraying system, a spraying tower second packing layer, a spraying tower second spraying system, a spraying tower liquid level meter, a spraying tower circulating pump, a spraying tower overflow port, a spraying tower sewage draining port and a spraying tower maintenance port; the spray tower body is of a hollow cylinder structure, the spray tower air inlet, the spray tower alkali liquor input port, the spray tower overflow port, the spray tower drain port and the spray tower maintenance port are all arranged on the side part of the spray tower body, and the spray tower air outlet is arranged on the top of the spray tower body; the system comprises a circulating water tank, a variable-frequency diffuser, a spray tower air outlet, a spray tower alkali liquor inlet, a spray tower circulating pump, a spray tower first spraying system and a spray tower second spraying system, wherein the spray tower air inlet is communicated with the exhaust outlet of the circulating water tank, which is positioned above the alkaline circulating water level, and is used for exhausting engine test bed tail gas exhausted by the variable-frequency diffuser; an alkaline circulating water conveying port of the circulating water tank, which is positioned below the alkaline circulating water level and used for conveying alkaline circulating water, is provided with a valve, the setting position of a spray tower overflow port is higher than that of a spray tower air inlet, a spray tower alkali liquor input port and a spray tower drain port, and the spray tower drain port is communicated with a wastewater inlet of wastewater treatment equipment through a pipeline; along the axis of the spray tower body, a spray tower first packing layer, a spray tower first spraying system, a spray tower second packing layer and a spray tower second spraying system are fixedly installed in the spray tower body from bottom to top in sequence, and a spray tower liquid level meter is arranged on the side part of the spray tower body and is positioned on the lower part of the spray tower first packing layer and used for monitoring the water level of wastewater at the bottom of the spray tower body.
3. The engine test stand exhaust gas treatment method according to claim 1, wherein: the circulating water tank is provided with a water filling port for filling municipal tap water.
4. The engine test stand exhaust gas treatment method according to claim 1, wherein: the circulating water tank is provided with a drain outlet which is discharged into the sewage treatment system.
5. The engine test stand exhaust gas treatment method according to claim 1, wherein: the circulating water tank is internally provided with a detector for detecting the pH value of alkaline circulating water in the circulating water tank, a thermometer for detecting the alkaline circulating water in the circulating water tank and a liquid level meter for displaying the level of the alkaline circulating water in the circulating water tank.
6. The engine test stand exhaust gas treatment method according to claim 1, wherein: the circulating water tank is provided with a feed port for feeding alkaline materials so as to ensure that the pH value of alkaline circulating water in the circulating water tank reaches a preset value.
7. The engine test stand exhaust gas treatment method according to claim 1, wherein: after the engine test, alkaline materials are put in through a feed port arranged in the circulating water tank and used for putting alkaline materials, so that the pH value of alkaline circulating water in the circulating water tank reaches a preset value.
8. The engine test stand exhaust gas treatment method according to claim 1, wherein: when the alkaline circulating water level in the circulating water tank is lower than a preset value, tap water is injected through a water injection port which is arranged in the circulating water tank and is used for injecting municipal tap water.
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| CN114486269B (en) * | 2022-04-15 | 2022-06-24 | 中国飞机强度研究所 | Engine driving temperature control system for aircraft testing laboratory and design method thereof |
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