CN113551254A - Energy-saving coal feeding system of power plant boiler - Google Patents
Energy-saving coal feeding system of power plant boiler Download PDFInfo
- Publication number
- CN113551254A CN113551254A CN202110953069.6A CN202110953069A CN113551254A CN 113551254 A CN113551254 A CN 113551254A CN 202110953069 A CN202110953069 A CN 202110953069A CN 113551254 A CN113551254 A CN 113551254A
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- Prior art keywords
- coal
- pipeline
- boiler
- flue gas
- smoke
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000003245 coal Substances 0.000 title claims abstract description 129
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003546 flue gas Substances 0.000 claims abstract description 40
- 238000001035 drying Methods 0.000 claims abstract description 31
- 239000000779 smoke Substances 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000002912 waste gas Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 11
- 238000012216 screening Methods 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 238000007599 discharging Methods 0.000 description 6
- 235000019504 cigarettes Nutrition 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002817 coal dust Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses an energy-saving coal feeding system of a power plant boiler, which comprises a boiler, a coal mill, a flue gas treatment device, a flue gas drying device and a heating device, wherein a coal storage cavity is arranged at one side of the boiler. The coal storage device is used for storing coal powder, a coal falling pipeline is arranged between the boiler and the combustion-supporting device, the coal pulverizer grinds coal and sends the coal into a coal storage cavity through the coal falling pipeline, a smoke exhaust pipeline is arranged between the waste gas treatment device and the boiler, the waste gas treatment device treats smoke discharged by the boiler, an air inlet pipeline is arranged between the smoke drying device and the smoke treatment device, the smoke drying device dries smoke in the smoke treatment device, the smoke exhaust pipeline is connected with the heating device, an air outlet pipeline is connected between one end of the heating device and the smoke drying device, and a combustion-supporting pipeline is arranged between the other end of the heating device and the boiler. The invention utilizes the flue gas generated by the boiler to convey the pulverized coal, and simultaneously heats the flue gas and sends the heated flue gas into the boiler, thereby increasing the heated area of the boiler, saving energy and protecting environment.
Description
Technical Field
The invention relates to the technical field of thermal power plants, in particular to an energy-saving coal feeding system of a boiler of a power plant.
Background
A thermal power plant, referred to as a thermal power plant for short, is a plant that produces electric energy using a combustible (e.g., coal) as a fuel; the basic production process is that fuel is heated to generate steam during burning, the chemical energy of the fuel is converted into heat energy, the steam pressure drives a turbine to rotate, the heat energy is converted into mechanical energy, and then the turbine drives a generator to rotate, and the mechanical energy is converted into electric energy. When current thermal power factory carries out air transportation, carry out air transportation in to the power respectively through the fan of difference, simultaneously when using the air of fan in with the boiler to take out, because contain in the air that takes out in the boiler and take a large amount of heats can directly discharge in the atmosphere, thereby thermal loss has been caused, the waste of resource has been caused, and the buggy that the coal that is used for boiler combustion processed through the coal pulverizer exists that partial granule is too big, can't satisfy the granularity requirement of high-efficient industry pulverized coal boiler to meticulous buggy.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide an energy-saving coal feeding system of a power plant boiler, wherein flue gas generated by the boiler is used for conveying pulverized coal, and the flue gas is heated and sent into the boiler, so that the heating area of the boiler is increased, the energy is saved, the environment is protected, the uniform particle size of the pulverized coal is ensured, and the boiler is convenient to burn.
In order to achieve the purpose, the invention discloses an energy-saving coal feeding system of a power plant boiler, which comprises:
the coal storage device comprises a boiler, wherein a coal storage cavity is arranged at one side of the boiler and is used for storing coal powder;
a coal dropping pipeline is arranged between the coal mill and the coal storage cavity, so that coal is ground by the coal mill and is fed into the coal storage cavity through the coal dropping pipeline;
a smoke exhaust pipeline is arranged between the waste gas treatment device and the boiler, so that the waste gas treatment device can treat smoke exhausted by the boiler;
the flue gas drying device is arranged between the flue gas drying device and the flue gas treatment device, so that the flue gas drying device dries the flue gas in the flue gas treatment device;
the heating device is connected with the smoke exhaust pipeline, an air outlet pipeline is connected between one end of the heating device and the smoke drying device, and a combustion-supporting pipeline is arranged between the other end of the heating device and the boiler.
Preferably, an air supply pipeline is arranged between the air outlet pipeline and the coal storage cavity.
Preferably, still include the rubbing crusher, the rubbing crusher with be provided with the pipeline of falling the material between the coal pipeline, the coal pipeline inner wall of falling in the below of the pipeline of falling the material is provided with the screening coal net, the screening coal net is used for screening the buggy, makes the buggy that does not pass through the screening fall into the rubbing crusher through the pipeline of falling the material and carries out the regrinding.
Preferably, the below of rubbing crusher is provided with and connects the workbin, connect the workbin with be connected with the coal pulverizer between and send the coal pipeline, send to be provided with first fan on the coal pipeline, the buggy in the rubbing crusher falls into connect in the workbin, make connect the buggy in the workbin under the effect of first fan, through send the coal pipeline into in the coal pulverizer.
Preferably, a pair of discharging bins are arranged above the coal mill and used for storing coal, and feeding devices are arranged at the bottoms of the discharging bins and used for feeding the coal in the discharging bins into the coal mill.
Preferably, the air outlet pipeline is provided with a second fan.
Preferably, the flue gas treatment device comprises a treatment tank, a filter screen is arranged in the middle of the treatment tank, an air outlet of the treatment tank is connected with the air inlet pipeline, and an air inlet of the treatment tank is connected with an air inlet of the smoke exhaust pipeline.
Preferably, the flue gas drying device comprises a drying tower, wherein a gas inlet of the drying tower is connected with the gas inlet pipeline, and a gas outlet of the drying tower is connected with the gas outlet pipeline.
The embodiment of the invention has the following beneficial effects:
according to the invention, coal is ground into coal powder by the coal grinding machine, then the coal powder is fed into the coal storage cavity for storage, meanwhile, large coal powder is screened out by the coal screening net, and is crushed again by the crusher and then fed back into the coal grinding machine, so that the uniform particle size of the coal powder is ensured, and the combustion in the boiler is facilitated.
The invention recycles the hot smoke generated by the boiler, so that the hot smoke is dedusted and dried, one part of smoke is used for heating and is sent into the boiler, the combustion effect of the boiler is increased, the energy consumption of the boiler is reduced, the other part of smoke is directly sent into the coal storage cavity, and the pulverized coal in the coal storage cavity is blown into the boiler, thereby realizing the automatic coal feeding of the boiler.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view showing a structure of a portion a in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, an energy-saving coal feeding system of a power plant boiler comprises a boiler 1, a coal mill 2, a flue gas treatment device 3, a flue gas drying device 4, a heating device 5 and a pulverizer 6
One side of the boiler 1 is provided with a coal storage cavity 11 for storing pulverized coal, and a coal dropping pipeline 21 is arranged between the coal storage cavity 11 and the coal mill 2, so that the coal mill 2 grinds coal and sends the coal into the coal storage cavity 11 through the coal dropping pipeline 21.
A pair of discharging bins 7 are arranged above the coal mill 2, the bottom of each discharging bin 7 is provided with a feeding device 71, in the embodiment, the feeding devices preferably adopt a screw transmission mode for feeding, so that the feeding devices 71 feed the coal in the discharging bins 7 into the coal mill 2, the coal mill grinds the coal into carbon slag and feeds the carbon slag into a coal storage cavity through a coal dropping pipeline,
referring to fig. 2 again, a material pouring pipe 22 is arranged between the pulverizer 6 and the coal dropping pipe 21, a coal screening net 211 is arranged on the inner wall of the coal dropping pipe 22 below the material pouring pipe 22, and when the coal dust in the coal pulverizer 2 is fed into the coal storage cavity 11, the coal dust is screened and filtered through the coal screening net 211, so that the coal dust with large particles is screened out, and falls into the pulverizer through the material pouring pipe 22 for secondary pulverization.
The below of rubbing crusher 6 is provided with and connects the workbin 61, connect to be connected with between workbin 61 and the coal pulverizer 2 and send coal pipe way 62, send and be provided with first fan 63 on the coal pipe way 62, the buggy in rubbing crusher 6 falls into and connects the workbin 61, the messenger connects the buggy in the workbin 61 under first fan 63 effect, send into in the coal pulverizer 2 through sending coal pipe way 62, make coal pulverizer 2 continue to send into coal storage cavity 11 with the pulverized coal of secondary crushing in, thereby guarantee that the granularity size of buggy is even, be convenient for the burning in the boiler.
Referring to fig. 1, be provided with flue gas pipeline 12 between flue gas processing apparatus 3 and the boiler 1, flue gas processing apparatus 3 is including handling jar 31, the middle part of handling jar 31 is provided with filter screen 32, the air inlet and the flue gas pipeline 12 of handling jar 31 are connected, it has solution in 12 to handle jar, the hot cigarette that boiler 1 discharged passes through flue gas pipeline 12 and gets into in handling jar 31, make the smoke and dust in the hot cigarette deposit in solution, the hot cigarette then continues to rise, filter the hot cigarette through filter screen 32, reduce the smoke and dust content in the hot cigarette.
An air inlet pipeline 33 is arranged between the flue gas drying device 4 and the flue gas processing device 3, the flue gas drying device 4 comprises a drying tower 41, an air inlet of the drying tower 41 is connected with one end of the air inlet pipeline 33, the other end of the air inlet pipeline 33 is connected with an air outlet of the processing tank 31, the drying tower is the prior art in the embodiment, repeated description is omitted again, hot flue gas enters the drying tower 41 through the air inlet pipeline 31 after being filtered, so that the drying tower 41 removes moisture in the hot flue gas, and dry flue gas is generated.
Be connected with between heating device 5's the one end and the drying tower 41 and give vent to anger pipeline 42, be provided with combustion-supporting pipeline 51 between the other end and the boiler 1, it is provided with second fan 421 on the pipeline 42 to give vent to anger, heating device preferably adopts the preheater in this embodiment, exhaust pipe 11 is connected with heating device 5, flue gas in the drying tower 41 gets into heating device 5 through giving vent to anger pipeline 42 under the effect of second fan 421, heat in utilizing exhaust pipe 12 heats the flue gas, make the flue gas after the heating send into in the boiler 1 through combustion-supporting pipeline 51, thereby improve the combustion effect of boiler, reduce the boiler energy consumption.
An air supply pipeline 43 is arranged between the air outlet pipeline 42 and the coal storage cavity 11, a first electromagnetic valve 431 is arranged on the air supply pipeline 43, one part of smoke in the drying tower 41 enters the heating device 5 under the action of the second fan 431, the other part of smoke is sent into the coal storage cavity 11 through the air supply pipeline 43, when the boiler 1 needs to add coal powder, the first electromagnetic valve 431 is opened, so that the coal powder in the coal storage cavity 11 is blown into the boiler 1 under the action of the air supply pipeline 43, and the combustion of the boiler is more stable.
An oxygen detection device is arranged at one end of the air outlet pipeline 43, which is adjacent to the heating device 5, an oxygen detector is preferably adopted in the embodiment, an air inlet pipe is arranged on the air outlet pipeline 43, a second electromagnetic valve is arranged on the air inlet pipe, when the oxygen detection device detects that the oxygen content of the flue gas in the air outlet pipeline is too low, the valve port controlled by the second electromagnetic valve of the air inlet pipe is increased, so that the air inlet amount of the air inlet pipe is increased, thereby increasing the oxygen content of the waste gas in the air outlet pipeline 43, when the oxygen detection device detects that the oxygen content of the waste gas in the air outlet pipeline 43 is too high, the valve port controlled by the second electromagnetic valve of the air inlet pipe 432 is reduced, and the air inlet amount of the air inlet pipe is reduced.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concept and features of the present invention, and are not intended to limit the scope of the present invention, which is defined by the following claims.
Claims (8)
1. An energy-saving coaling system of a power plant boiler, comprising:
the coal storage device comprises a boiler, wherein a coal storage cavity is arranged at one side of the boiler and is used for storing coal powder;
a coal dropping pipeline is arranged between the coal mill and the coal storage cavity, so that coal is ground by the coal mill and is fed into the coal storage cavity through the coal dropping pipeline;
a smoke exhaust pipeline is arranged between the waste gas treatment device and the boiler, so that the waste gas treatment device can treat smoke exhausted by the boiler;
the flue gas drying device is arranged between the flue gas drying device and the flue gas treatment device, so that the flue gas drying device dries the flue gas in the flue gas treatment device;
the heating device is connected with the smoke exhaust pipeline, an air outlet pipeline is connected between one end of the heating device and the smoke drying device, and a combustion-supporting pipeline is arranged between the other end of the heating device and the boiler.
2. An energy-saving coal feeding system of a power plant boiler in accordance with claim 1, wherein a gas supply pipeline is provided between the gas outlet pipeline and the coal storage chamber.
3. The energy-saving coal feeding system of the power plant boiler according to claim 1, further comprising a pulverizer, wherein a material pouring pipeline is arranged between the pulverizer and the material falling pipeline, a coal screening net is arranged on the inner wall of the material falling pipeline below the material pouring pipeline and used for screening coal powder, and the coal powder which does not pass through the screening falls into the pulverizer through the material pouring pipeline to be secondarily pulverized.
4. The energy-saving coal feeding system of the power plant boiler according to claim 3, wherein a receiving box is arranged below the pulverizer, a coal feeding pipeline is connected between the receiving box and the coal pulverizer, a first fan is arranged on the coal feeding pipeline, and pulverized coal in the pulverizer falls into the receiving box, so that the pulverized coal in the receiving box is fed into the coal pulverizer through the coal feeding pipeline under the action of the first fan.
5. The energy-saving coal feeding system of the power plant boiler in claim 1, wherein a pair of lower bins are arranged above the coal mill for storing coal, and a feeding device is arranged at the bottom of each lower bin, so that the feeding device feeds the coal in the lower bins into the coal mill.
6. An energy-saving coal supply system of a power plant boiler in accordance with claim 2, wherein said outlet pipe is provided with a second fan.
7. The energy-saving coal feeding system of the power plant boiler in claim 1, wherein the flue gas treatment device comprises a treatment tank, a filter screen is arranged in the middle of the treatment tank, an air outlet of the treatment tank is connected with the air inlet pipeline, and an air inlet of the treatment tank is connected with an air inlet of the smoke exhaust pipeline.
8. The energy-saving coaling system of power plant boiler as recited in claim 1, wherein said flue gas drying device comprises a drying tower, an air inlet of said drying tower is connected with said air inlet pipeline, and an air outlet of said drying tower is connected with said air outlet pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110953069.6A CN113551254A (en) | 2021-08-18 | 2021-08-18 | Energy-saving coal feeding system of power plant boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110953069.6A CN113551254A (en) | 2021-08-18 | 2021-08-18 | Energy-saving coal feeding system of power plant boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113551254A true CN113551254A (en) | 2021-10-26 |
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ID=78134065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110953069.6A Pending CN113551254A (en) | 2021-08-18 | 2021-08-18 | Energy-saving coal feeding system of power plant boiler |
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| Country | Link |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070243119A1 (en) * | 2006-04-13 | 2007-10-18 | William Downs | Process for controlling the moisture concentration of a combustion flue gas |
| CN212777314U (en) * | 2020-05-20 | 2021-03-23 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Coal-fired boiler system |
| CN215675277U (en) * | 2021-08-18 | 2022-01-28 | 中国华能集团有限公司南方分公司 | Energy-saving coal feeding system of power plant boiler |
-
2021
- 2021-08-18 CN CN202110953069.6A patent/CN113551254A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070243119A1 (en) * | 2006-04-13 | 2007-10-18 | William Downs | Process for controlling the moisture concentration of a combustion flue gas |
| CN212777314U (en) * | 2020-05-20 | 2021-03-23 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Coal-fired boiler system |
| CN215675277U (en) * | 2021-08-18 | 2022-01-28 | 中国华能集团有限公司南方分公司 | Energy-saving coal feeding system of power plant boiler |
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