CN110756047A - Carbon black water waste gas treatment system and carbon black removal system using same - Google Patents
Carbon black water waste gas treatment system and carbon black removal system using same Download PDFInfo
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- CN110756047A CN110756047A CN201911192044.8A CN201911192044A CN110756047A CN 110756047 A CN110756047 A CN 110756047A CN 201911192044 A CN201911192044 A CN 201911192044A CN 110756047 A CN110756047 A CN 110756047A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 229910001868 water Inorganic materials 0.000 title claims abstract description 74
- 239000006229 carbon black Substances 0.000 title claims abstract description 68
- 239000002912 waste gas Substances 0.000 title claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 74
- 230000003197 catalytic effect Effects 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004458 analytical method Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 7
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 7
- 238000003795 desorption Methods 0.000 claims abstract description 6
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012084 conversion product Substances 0.000 claims abstract description 4
- 238000011084 recovery Methods 0.000 claims abstract description 4
- 239000002918 waste heat Substances 0.000 claims abstract description 4
- 238000004457 water analysis Methods 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 58
- 238000005336 cracking Methods 0.000 claims description 30
- 238000005406 washing Methods 0.000 claims description 26
- 238000011065 in-situ storage Methods 0.000 claims description 25
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 21
- 238000000197 pyrolysis Methods 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 15
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 13
- 238000007790 scraping Methods 0.000 claims description 13
- 239000003345 natural gas Substances 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000000746 purification Methods 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 9
- 238000002386 leaching Methods 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000010866 blackwater Substances 0.000 claims description 2
- 239000003610 charcoal Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 14
- 239000000945 filler Substances 0.000 abstract description 7
- 239000006227 byproduct Substances 0.000 abstract description 5
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000005997 Calcium carbide Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 150000001345 alkine derivatives Chemical class 0.000 description 1
- IYABWNGZIDDRAK-UHFFFAOYSA-N allene Chemical compound C=C=C IYABWNGZIDDRAK-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- LLCSWKVOHICRDD-UHFFFAOYSA-N buta-1,3-diyne Chemical group C#CC#C LLCSWKVOHICRDD-UHFFFAOYSA-N 0.000 description 1
- WFYPICNXBKQZGB-UHFFFAOYSA-N butenyne Chemical group C=CC#C WFYPICNXBKQZGB-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910021426 porous silicon Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- MWWATHDPGQKSAR-UHFFFAOYSA-N propyne Chemical compound CC#C MWWATHDPGQKSAR-UHFFFAOYSA-N 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
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-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24V—COLLECTION, PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR
- F24V30/00—Apparatus or devices using heat produced by exothermal chemical reactions other than combustion
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Treating Waste Gases (AREA)
- Industrial Gases (AREA)
Abstract
The invention discloses a carbon black water waste gas treatment system, which comprises an environment-friendly fan cover, an environment-friendly fan, a catalytic conversion preheater, a catalytic converter and a steam generator which are sequentially connected; the environment-friendly fan cover and the environment-friendly fan are used for collecting and conveying the analysis gas obtained by carbon black water analysis; the catalytic converter is used for catalytically converting the desorption gas from the environment-friendly fan into carbon dioxide and water; the catalytic conversion preheater comprises a tube side and a shell side, wherein gas to be heated is arranged in the tube side, and a heating medium is arranged in the shell side; the heating medium is a catalytic conversion product which is led out by the catalytic converter and is subjected to waste heat recovery by the steam generator. According to the carbon black removal system based on the carbon black water waste gas treatment system, harmful gas analyzed from carbon black or filler in the treatment process can be effectively prevented from polluting the environment, and potential safety hazards are eliminated; moreover, the system produces low-pressure steam as a byproduct, and can improve the energy utilization rate.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a carbon black water waste gas treatment system and a carbon black removal system using the same.
Background
Acetylene is used as an important chemical raw material and is generally prepared by a calcium carbide method and a natural gas partial oxidation method. Compared with the acetylene preparation process by the calcium carbide method, the process for preparing acetylene from natural gas has the advantages of low energy consumption, full utilization of byproducts, small environmental pollution and the like, and is widely applied at home and abroad at present. In the process of preparing acetylene by partial oxidation of natural gas, the acetylene product can be prepared by cracking, compressing and concentrating the natural gas.
In the cracking process of the natural gas acetylene preparation device, natural gas and oxygen are preheated, most of the oxygen and the oxygen are subjected to flame combustion, heat is released to generate carbon monoxide, carbon dioxide, hydrogen and water, and the generated heat is supplied to part of the residual natural gas to be cracked to generate acetylene and hydrogen. Some side reactions also occur while the main reaction occurs, with acetylene continuing to decompose to form carbon black or to polymerize to higher alkynes. Therefore, the cracked gas needs to be dedusted and purified before being sent to the downstream concentration and refining processes.
In the prior art, patent document No. CN101921163A describes a method for removing carbon black and high polymer in acetylene preparation by plasma pyrolysis of natural gas, which comprises the steps of performing hot water spray washing and filler adsorption on the pyrolysis gas at 60-130 ℃, performing single-stage electric dust removal treatment, and finally performing cooling washing at 20-40 ℃. In the whole process, zeolite, porous alumina, porous silicon carbide or molecular sieve is required to be used as a filler for adsorption, so that the economic cost is higher. In addition, the difficulty of filler cleaning or desorption is high, and the reutilization rate is not high; in addition, because the filler adsorption process is carried out in a pressurized environment, the filler and the carbon black are easy to adsorb harmful substances such as diacetylene, propyne, vinyl acetylene, propadiene, acetylene, carbon monoxide, hydrogen, benzene, naphthalene and the like in the pyrolysis gas, and the harmful gases are desorbed due to pressure reduction when the filler is cleaned or desorbed, so that peculiar smell needs to be formed in the surrounding environment, and serious environmental pollution and potential safety hazards are caused.
Disclosure of Invention
Aiming at the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a charcoal black water exhaust gas treatment system which characterized in that: the device comprises an environment-friendly fan cover, an environment-friendly fan, a catalytic conversion preheater, a catalytic converter and a steam generator which are connected in sequence; the environment-friendly fan cover and the environment-friendly fan are used for collecting and conveying the analysis gas obtained by carbon black water analysis; the catalytic converter is used for catalytically converting the desorption gas from the environment-friendly fan into carbon dioxide and water; the catalytic conversion preheater comprises a tube side and a shell side, wherein gas to be heated is arranged in the tube side, and a heating medium is arranged in the shell side; the heating medium is a catalytic conversion product which is led out by the catalytic converter and is subjected to waste heat recovery by the steam generator.
The invention discloses a preferable carbon black water waste gas treatment system, which is characterized in that: and a directly emptied flow regulating branch is arranged on a pipeline of the steam generator, which leads to the catalytic conversion preheater, and a regulating valve is arranged on the flow regulating branch and is used for regulating the conversion generation temperature of the catalytic converter.
The invention discloses a preferable carbon black water waste gas treatment system, which is characterized in that: the steam generator is a device for converting boiler feed water into steam, and the downstream of the steam generator is connected with a low-pressure steam pipe network.
On the basis of the carbon black water waste gas treatment system, the invention also provides a carbon black removal system for preparing acetylene by natural gas cracking, which is connected with a cracking furnace and is characterized in that: the system comprises a cooling washing tower and an electric filter which are positioned at the downstream of the cracking furnace and are sequentially connected, and an in-situ circulating water system for leaching and cooling the carbon black in the cracking furnace, the cooling washing tower and the electric filter;
the on-site circulating water system comprises a solid-liquid separation system for separating carbon black from on-site circulating water, the solid-liquid separation system being equipped with the carbon black water exhaust gas treatment system as recited in any one of claims 1 to 3.
The invention discloses a preferable carbon black removing system, which is characterized in that: the solid-liquid separation system comprises a carbon scraping pool and a carbon scraping machine, and the downstream of the solid-liquid separation system is respectively connected with a carbon black slurry collecting tank and an in-situ circulating water cooling system; the solid-liquid separation system is provided with an environment-friendly fan cover and is used for collecting the analysis gas and conveying the analysis gas to the carbon black water waste gas treatment system through an environment-friendly fan.
Furthermore, the downstream of the in-situ circulating water cooling system is respectively connected with the cracking furnace, the cooling washing tower and the electric filter, and the treated in-situ circulating water is used for cooling the pyrolysis gas in a leaching or flushing mode and capturing carbon black in the pyrolysis gas.
The invention discloses a preferable carbon black removing system, which is characterized in that: the cracking furnace is provided with a multi-stage spraying device connected with the on-site circulating water cooling system and used for cooling and purifying the cracked gas for one time.
The invention discloses a preferable carbon black removing system, which is characterized in that: the cooling washing tower is of an upper-lower two-section structure, the lower section is used for performing secondary cooling purification on the pyrolysis gas from the cracking furnace, the lower section is communicated with the upper section through an electric filter used for performing electric dust removal purification on the pyrolysis gas, and the upper section is used for performing tertiary cooling purification on the pyrolysis gas.
Furthermore, the upper section and the lower section of the cooling washing tower are both provided with a multi-stage spraying device for cooling and purifying the cracked gas, the multi-stage spraying device arranged on the upper section is connected with the on-site circulating water cooling system, and the circulating water leached from the upper section is led into the multi-stage spraying device on the lower section, so that the single recycling efficiency of the on-site circulating water is improved.
The invention discloses a preferable carbon black removing system, which is characterized in that: the electric filter is used for adsorbing and precipitating tiny carbon black particles in the pyrolysis gas, and the electrode plate is washed by adopting in-situ circulating water to wash away the trapped carbon black.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the carbon black removing system can purify the cracked gas step by step and in multiple stages in the process of cooling the cracked gas; moreover, the problems that harmful gases generated by analysis pollute the environment and cause potential safety hazards in the liquid-solid separation process of the carbon black and the in-situ circulating water can be effectively solved. In addition, the system can produce low-pressure steam as a byproduct, can improve the energy utilization rate, and predicts a set of acetylene devices with 4 ten thousand tons per year and can produce 13barg of low-pressure steam about 762kg/h as a byproduct.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic view of the overall structure of the present invention.
Description of reference numerals:
1-a cracking furnace, 2-a cooling washing tower, 21-pyrolysis gas discharging, 3-an electric filter, 4-an in-situ circulating water cooling system, 5-a solid-liquid separation system, 51-a carbon scraping pool, 52-a carbon scraping machine, 53-an environment-friendly fan cover, 54-an environment-friendly fan, 61-a catalytic conversion preheater, 62-a catalytic converter, 63-a steam generator, 64-boiler feed water, 65-a low-pressure steam pipe network, and 66-standard emptying.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in figure 1, the invention discloses a system for removing carbon black in acetylene prepared by natural gas cracking, which is connected with a cracking furnace 1, and comprises a cooling washing tower 2 and an electric filter 3 which are arranged at the downstream of the cracking furnace 1 and are sequentially connected, and an in-situ circulating water system for washing and cooling the carbon black in the cracking furnace 1, the cooling washing tower 2 and the electric filter 3. The on-site circulating water system comprises a solid-liquid separation system 5 for separating carbon black from on-site circulating water, wherein the solid-liquid separation system 5 comprises a carbon scraping pool 51 and a carbon scraping machine 52, the downstream of the solid-liquid separation system 5 is respectively connected with a carbon black slurry collecting tank 54 and an on-site circulating water cooling system 4, and the downstream of the on-site circulating water cooling system 4 is respectively connected with a cracking furnace 1, a cooling washing tower 2 and an electric filter 3 for cooling cracking gas in a leaching or flushing mode and capturing the carbon black in the cracking gas.
The cracking furnace 1 is provided with a multi-stage spraying device connected with the on-site circulating water cooling system 4 and used for carrying out primary cooling purification on the cracked gas. The cooling washing tower 2 is of an upper-lower two-section structure, the lower section is used for performing secondary cooling purification on the cracked gas from the cracking furnace 1, the electric filter 3 used for performing electric dust removal purification on the cracked gas is communicated with the upper section, and the upper section is used for performing tertiary cooling purification on the cracked gas. The upper section and the lower section of the cooling washing tower 2 are both provided with a multi-stage spraying device for cooling and purifying the cracked gas, the multi-stage spraying device arranged at the upper section is connected with the in-situ circulating water cooling system 4, and the circulating water leached from the upper section is led into the multi-stage spraying device at the lower section so as to improve the single recycling efficiency of the in-situ circulating water. The electric filter 3 is used for adsorbing and precipitating tiny carbon black particles in the pyrolysis gas, and the electrode plates are washed by adopting in-situ circulating water to wash away the trapped carbon black.
The technical scheme for purifying the cracked gas is realized as follows:
the in-situ circulating water is cooled by the in-situ circulating water cooling system 4, and the in-situ circulating water can be used for cooling and purifying the cracking furnace 1, the cooling washing tower 2 and the electric filter 3 after the temperature reaches the standard. A large amount of cooled in-situ circulating water is sprayed into the cracking furnace 1, which can be used for stopping the reaction and washing away a large amount of carbon black byproduct. Cracking gas produced by the cracking furnace 1 enters the lower section of the cooling washing tower 2, is washed by in-situ circulating water sprayed from the middle part of the cooling washing tower 2, is cooled and enters the electric filter 3; tiny carbon black particles in the cracked gas in the electric filter 3 are adsorbed and precipitated on the electrode plates, and the trapped carbon black is taken away by flushing the electrode plates through in-situ circulating water; the pyrolysis gas after electric precipitation enters the upper section of the cooling washing tower 2, is washed by water and then is discharged and sent to the next procedure. The carbon black-containing in-situ circulating water from the cracking furnace 1, the cooling washing tower 2 and the electric filter 3 is converged and then enters the carbon scraping pool 51, after standing and layering in the carbon scraping pool 51, the carbon black slurry on the upper part is scraped into the carbon black slurry collecting tank 55 by the carbon scraping machine 52, and the water on the lower part is cooled by the in-situ circulating water cooling system 4 and then is circularly sent to the cracking furnace 1, the cooling washing tower 2 and the electric filter 3 for reuse.
In order to eliminate the pollution of harmful gas analyzed by carbon black and/or in-situ circulating water to the environment and further improve the application effect of the invention, the solid-liquid separation system 5 is connected with a carbon black water waste gas treatment system, so that the analyzed gas can be catalytically converted into carbon dioxide and water, and the harmless treatment of the analyzed gas is realized. Specifically, the carbon black water waste gas treatment system comprises a catalytic conversion preheater 61, a catalytic converter 62 and a steam generator 63 which are connected in sequence, wherein the environment-friendly air hood 53 and the environment-friendly fan 54 are used for collecting and conveying the analysis gas analyzed from the carbon black water; the catalytic converter 62 is used for catalytically converting the desorption gas from the environmental protection fan into carbon dioxide and water; the catalytic conversion preheater 61 comprises a tube side and a shell side, wherein gas to be heated is arranged in the tube side, and a heating medium is arranged in the shell side; the heating medium is led out by the catalytic converter 62 and the catalytic conversion products after recovering the waste heat by the steam generator 63. The pipeline leading from the steam generator 63 to the catalytic conversion preheater 61 is provided with a directly evacuated flow regulating branch, which is provided with a regulating valve for regulating the conversion generation temperature of the catalytic converter 62. The steam generator 63 is a device for converting boiler feed water 64 into steam, and is connected downstream to a low-pressure steam pipe network 65.
The technical scheme for understanding gas evolution at the harmless part is realized as follows:
an environment-friendly air hood 53 and an environment-friendly fan 54 are arranged at the upper part of the carbon scraping pool 51, and harmful gas in the area of the carbon scraping pool 51 is collected by utilizing suction of the environment-friendly fan 54; the mixed gas (air and harmful gas) after the pressure of the outlet of the environment-friendly fan 54 is boosted is sent to the tube side of the catalytic conversion preheater 61; the normal temperature mixed gas is heated to 110 ℃ through the catalytic conversion preheater 61 to reach the generation temperature required by the reaction of the catalytic converter 62; in the catalytic converter 62, the preheated mixed gas converts harmful components in the mixed gas into carbon dioxide and water under the action of a platinum-palladium catalyst; the heat of the catalytic conversion reaction is such that the temperature of the outlet gas from the catalytic converter 62 reaches about 470 ℃, the gas is sent to a steam generator 63 for heat recovery, and steam with the temperature of 195 ℃ and the pressure of 13barg is produced and merged into a low-pressure steam pipe network 65; the exhaust gas from the top of the steam generator 63 enters the shell side of a catalytic conversion preheater 61, and after the mixed gas to be reacted is preheated, the temperature is reduced to 130 ℃, and the exhaust gas is exhausted after reaching the standard 66; be provided with the flow control branch road before catalytic conversion preheater 61 for adjust catalytic conversion preheater 61 and preheat the effect, avoid the mist temperature too high, influence catalytic conversion reaction effect.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. The utility model provides a charcoal black water exhaust gas treatment system which characterized in that: the device comprises an environment-friendly fan cover, an environment-friendly fan, a catalytic conversion preheater, a catalytic converter and a steam generator which are connected in sequence; the environment-friendly fan cover and the environment-friendly fan are used for collecting and conveying the analysis gas obtained by carbon black water analysis; the catalytic converter is used for catalytically converting the desorption gas from the environment-friendly fan into carbon dioxide and water; the catalytic conversion preheater comprises a tube side and a shell side, wherein gas to be heated is arranged in the tube side, and a heating medium is arranged in the shell side; the heating medium is a catalytic conversion product which is led out by the catalytic converter and is subjected to waste heat recovery by the steam generator.
2. The carbon black water exhaust gas treatment system according to claim 1, wherein: and a directly emptied flow regulating branch is arranged on a pipeline of the steam generator, which leads to the catalytic conversion preheater, and a regulating valve is arranged on the flow regulating branch and is used for regulating the conversion generation temperature of the catalytic converter.
3. The carbon black water exhaust gas treatment system according to claim 1 or 2, wherein: the steam generator is a device for converting boiler feed water into steam, and the downstream of the steam generator is connected with a low-pressure steam pipe network.
4. The utility model provides a carbon black desorption system for natural gas schizolysis system acetylene, its and pyrolysis furnace are connected which characterized in that: the system comprises a cooling washing tower and an electric filter which are positioned at the downstream of the cracking furnace and are sequentially connected, and an in-situ circulating water system for leaching and cooling the carbon black in the cracking furnace, the cooling washing tower and the electric filter;
the on-site circulating water system comprises a solid-liquid separation system for separating carbon black from on-site circulating water, the solid-liquid separation system being equipped with the carbon black water exhaust gas treatment system as recited in any one of claims 1 to 3.
5. The carbon black removal system of claim 4, wherein: the solid-liquid separation system comprises a carbon scraping pool and a carbon scraping machine, and the downstream of the solid-liquid separation system is respectively connected with a carbon black slurry collecting tank and an in-situ circulating water cooling system; the solid-liquid separation system is provided with an environment-friendly fan cover and is used for collecting the analysis gas and conveying the analysis gas to the carbon black water waste gas treatment system through an environment-friendly fan.
6. The carbon black removal system of claim 5, wherein: the downstream of the in-situ circulating water cooling system is respectively connected with the cracking furnace, the cooling washing tower and the electric filter, and the treated in-situ circulating water is used for cooling the pyrolysis gas in a leaching or flushing mode and capturing carbon black in the pyrolysis gas.
7. The carbon black removal system according to any one of claims 4-6, wherein: the cracking furnace is provided with a multi-stage spraying device connected with the on-site circulating water cooling system and used for cooling and purifying the cracked gas for one time.
8. The carbon black removal system according to any one of claims 4-6, wherein: the cooling washing tower is of an upper-lower two-section structure, the lower section is used for performing secondary cooling purification on the pyrolysis gas from the cracking furnace, the lower section is communicated with the upper section through an electric filter used for performing electric dust removal purification on the pyrolysis gas, and the upper section is used for performing tertiary cooling purification on the pyrolysis gas.
9. The carbon black removal system of claim 8, wherein: the upper section and the lower section of the cooling washing tower are respectively provided with a multi-stage spray device for cooling and purifying the cracked gas, the multi-stage spray device arranged at the upper section is connected with the on-site circulating water cooling system, and the on-site circulating water leached by the upper section is led into the multi-stage spray device at the lower section, so that the single recycling efficiency of the on-site circulating water is improved.
10. The carbon black removal system according to any one of claims 4-6, wherein: the electric filter is used for adsorbing and precipitating tiny carbon black particles in the pyrolysis gas, and the electrode plate is washed by adopting in-situ circulating water to wash away the trapped carbon black.
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