CN222816523U - A VOCs treatment device for low-temperature pyrolysis of coal - Google Patents
A VOCs treatment device for low-temperature pyrolysis of coal Download PDFInfo
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- CN222816523U CN222816523U CN202421467565.6U CN202421467565U CN222816523U CN 222816523 U CN222816523 U CN 222816523U CN 202421467565 U CN202421467565 U CN 202421467565U CN 222816523 U CN222816523 U CN 222816523U
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Abstract
本申请涉及VOCs废气处理领域，具体公开了一种用于煤低温热解的VOCs治理装置。一种用于煤低温热解的VOCs治理装置包括罐区尾气收集系统、液下池尾气收集系统、炉顶尾气收集系统、出焦地坑尾气收集系统、烧结板除尘器、喷淋除雾塔、气液分离塔、燃烧系统和废水处理装置。本申请对于不同的VOCs排放源，如罐区、液下池、炉顶和出焦地坑等，本发明都提供了相应的收集和处理措施，确保整个系统能够全面覆盖并有效治理VOCs。
The present application relates to the field of VOCs waste gas treatment, and specifically discloses a VOCs treatment device for low-temperature pyrolysis of coal. A VOCs treatment device for low-temperature pyrolysis of coal includes a tank area tail gas collection system, a submerged pool tail gas collection system, a furnace top tail gas collection system, a coke pit tail gas collection system, a sintering plate dust collector, a spray mist removal tower, a gas-liquid separation tower, a combustion system and a wastewater treatment device. For different VOCs emission sources, such as tank areas, submerged pools, furnace tops and coke pits, the present invention provides corresponding collection and treatment measures to ensure that the entire system can fully cover and effectively treat VOCs.
Description
Technical Field
The application relates to the field of VOCs waste gas treatment, in particular to a VOCs treatment device for low-temperature pyrolysis of coal.
Background
The low-temperature pyrolysis device for coal is a complex system comprising a plurality of working procedures of coal preparation, carbonization, purification and the like. The carbonization section is used as a key part in the whole flow, and relates to a plurality of production links such as wet quenching, tar-ammonia water separation, tar storage tanks and the like. These links cooperate together to achieve low temperature pyrolysis of coal and to produce corresponding chemical products and byproducts.
During wet quenching, a large amount of volatile organic gases are generated after the high Wen Lantan contacts quench water. Also, the devices such as the tar-ammonia water separation device and the tar storage tank can escape the tail gas in the running process. The tail gas mainly contains non-methane total hydrocarbons, tar droplets, water vapor, dust and other volatile organic gases (VOCs). These unorganized emissions of VOCs can not only pollute the environment, but can also negatively impact staff's occupational health.
Disclosure of Invention
In order to realize zero emission of VOCs in the low-temperature pyrolysis process of coal, the application provides a VOCs treatment device for low-temperature pyrolysis of coal.
The application provides a VOCs treatment device for low-temperature pyrolysis of coal, which adopts the following technical scheme:
In a first aspect, the application provides a VOCs treatment device for low-temperature pyrolysis of coal, which adopts the following technical scheme:
A VOCs abatement apparatus for low temperature pyrolysis of coal, comprising:
The tail gas collecting system comprises a tank area tail gas collecting system, a submerged pool tail gas collecting system, a furnace top tail gas collecting system and a discharge Jiao Dekeng tail gas collecting system, wherein the tank area tail gas collecting system, the submerged pool tail gas collecting system, the furnace top tail gas collecting system and the discharge Jiao Dekeng tail gas collecting system all comprise a gas collecting hood, a breather valve and a tail gas collecting pipeline which are positioned in a collecting area, the breather valve is communicated through the tail gas collecting pipeline, and a pipeline dust remover is further connected to the tail gas collecting pipelines of the furnace top tail gas collecting system and the discharge Jiao Dekeng tail gas collecting system;
The inlet of the sintering plate dust remover is communicated with a furnace top tail gas collecting system and a tail gas collecting pipeline of the outlet Jiao Dekeng tail gas collecting system, and the sintering plate dust remover is used for primarily removing dust and purifying the collected tail gas;
The inlet of the spray mist removing tower is communicated with the tail gas collecting system of the tank area, the tail gas collecting pipeline of the submerged pool tail gas collecting system and the outlet of the sintering plate dust remover, and a spray device is arranged in the spray mist removing tower and is used for washing, cooling and cooling the collected tail gas;
The inlet of the gas-liquid separation tower is connected with the outlet of the spray demisting tower, and a high-efficiency vane demisting device is arranged in the gas-liquid separation tower and is used for separating liquid drops in tail gas;
The combustion system is connected with an outlet of the high-efficiency gas-liquid separation tower, and comprises a direct combustion device and a catalytic combustion device, wherein the catalytic combustion device comprises an activated carbon adsorption box and is used for intercepting volatile organic substances;
And a wastewater treatment device for treating the condensate collected from each treatment device.
Optionally, an energy recovery system for recovering heat energy generated in the combustion system and for use in preheating or other heat energy requirements of the coal pyrolysis process is also included, the energy recovery system including a heat exchanger coupled to a discharge of the combustion system.
Optionally, the spray mist removing tower adopts a high tower design to reduce the occupied area, the bottom of the spray mist removing tower is used as a circulating pool, and the washing circulating water is conveyed to a spray device in the tower through a circulating water pump.
Optionally, high-efficient blade defogging device includes a plurality of deflector, the deflector surface is provided with wavy guide slot, guide slot 'S link up the direction and be perpendicular with the flow direction of gas along the deflector, the deflector both sides are fixed to be provided with a plurality of interval evenly distributed' S baffling board, all set up the choked flow portion that is equipped with the buckle in an organic whole at baffling board both ends, the choked flow portion at baffling board both ends sets up towards opposite direction, the baffling board is the S-shaped as a whole.
Optionally, the inside filter element of sintered plate dust remover adopts the sintered plate, the sintered plate is equipped with a plurality ofly, and a plurality of sintered plates are vertical to be set up in sintered plate dust remover inside side by side, the sintered plate is wave sintered plate.
Optionally, the surface of the sintered plate is coated with a PTFE coating.
Optionally, an activated carbon bed is arranged in the activated carbon adsorption box, and after the activated carbon bed reaches an adsorption saturation state, the activated carbon adsorption box is burnt under the condition of low temperature and no flame under the action of noble metal catalysts such as platinum, palladium and the like taking ceramics as carriers, so that the trapped volatile organic substances are oxidized and decomposed into CO 2 and H 2 O.
In summary, the present application includes at least one of the following beneficial technical effects:
1. The VOCs treatment device for low-temperature pyrolysis of coal provided by the application is flexible in design, and can be split or combined according to actual working conditions and requirements. This means that suitable process sections and equipment can be selected for application as the case may be, both at large coal pyrolysis plants and at small laboratory scale. In addition, for different VOCs emission sources, such as tank areas, submerged ponds, furnace tops, jiao Dekeng outlets and the like, the application provides corresponding collecting and treating measures, so that the whole system can be covered on the whole surface and the VOCs can be effectively treated;
2. The sintering plate dust remover, the spray demister, the high-efficiency gas-liquid separation tower and other process equipment adopt advanced technologies and materials, and can efficiently capture dust, tar mist drops and volatile organic compounds in tail gas. In particular to a sintered plate dust remover, which has micron-sized filter pore diameter and special surface coating, so that the trapping rate reaches more than 99 percent. In addition, the direct combustion and catalytic combustion device thoroughly decompose VOCs, so that zero emission of the VOCs is realized, and the environment is effectively protected;
3. The process equipment in the application has advanced type selection, high processing capacity and high automation degree, and reduces the dependence of manual operation and the risk of misoperation. For example, both the sinter plate dust collector and the spray mist eliminator are equipped with automatic control systems that automatically adjust the operating conditions based on the exhaust gas composition and treatment requirements. In addition, the safety interlocking device ensures the safety of the whole system in the running process, and further improves the running reliability.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a VOCs treatment device for coal pyrolysis according to an embodiment of the application;
FIG. 2 is a schematic view of a sintered plate of a VOCs treatment device for low-temperature pyrolysis of coal according to an embodiment of the present application;
FIG. 3 is a schematic view of a vane mist eliminator of a VOCs treatment device for coal pyrolysis according to an embodiment of the present application.
The reference numerals are 1, a tail gas collecting system, 11, a gas collecting hood, 12, a breather valve, 13, a tail gas collecting pipeline, 14, a pipeline dust remover, 2, a sintered plate dust remover, 21, a sintered plate, 211, a coalescing tank, 3, a spray mist removing tower, 31, a first induced draft fan, 32, a circulating water pump, 4, a gas-liquid separation tower, 41, a high-efficiency blade mist removing device, 411, a guide plate, 4111, a guide groove, 412, a baffle plate, 4121, a choked flow part, 5, a combustion system, 51, a direct combustion device, 52, a catalytic combustion device, 53, a second induced draft fan, 6, an energy recovery system, 61, a heat exchanger, 7, a wastewater treatment device and 71, and a condensate collecting pipeline.
Detailed Description
The application is described in further detail below with reference to fig. 1-3.
The embodiment of the application discloses a VOCs treatment device for low-temperature pyrolysis of coal. Referring to fig. 1, a VOCs treatment apparatus for low-temperature pyrolysis of coal includes a tail gas collecting system 1, a sintered plate dust remover 2, a spray mist eliminator 3, a gas-liquid separation tower 4, a combustion system 5, an energy recovery system 6, and a wastewater treatment apparatus 7.
Referring to fig. 1, the exhaust gas collection system 1 comprises a tank field exhaust gas collection system, a submerged pool exhaust gas collection system, a furnace top exhaust gas collection system and an outlet Jiao Dekeng exhaust gas collection system. Tank field tail gas collecting system, submerged pool tail gas collecting system, furnace roof tail gas collecting system and play Jiao Dekeng tail gas collecting system all including being located the gas collecting hood 11, breather valve 12 and the tail gas collecting pipe 13 of collecting field, gas collecting hood 11 is connected with the VOCs discharge port of each collecting field respectively, and gas collecting hood 11 is used for reinforcing the leakproofness of equipment in the collecting field to be provided with effectual collection point, in time guide the VOCs tail gas that produces to follow-up treatment facility, the fixed intercommunication of tail gas collecting pipe 13 one end and gas collecting hood 11, the other end and spray defogging tower 3 intercommunication. The tail gas collecting pipeline 13 of the furnace top tail gas collecting system and the discharged Jiao Dekeng tail gas collecting system is also connected with a pipeline dust remover 14, and as more solid dust particles exist in the furnace top tail gas and the discharged coke pit tail gas, the pipeline dust remover 14 is arranged to carry out preliminary coarse filtration on the tail gas.
Referring to fig. 1 and 2, the end parts of the tail gas collecting pipelines 13 of the furnace top tail gas collecting system and the outlet Jiao Dekeng tail gas collecting system are communicated with the inlet of the sintering plate dust remover 2. The filter element in the sintering plate dust collector 2 adopts a plurality of sintering plates 21, the sintering plates 21 are vertically arranged in parallel in the sintering plate dust collector 2, and the surface of the sintering plates 21 perpendicular to the airflow direction is provided with wave-shaped aggregation grooves 211. The collected furnace top tail gas and coke-discharging pit tail gas are further subjected to primary dust removal and purification through the sintering plate dust remover 2 so as to facilitate the subsequent purification treatment of VOCs.
Referring to fig. 1 and 2, the sintering plate 21 is formed by casting and sintering a polymer compound into a wave-shaped sintering plate 21 with gaps, and a PTFE coating is sprayed on the surface of the sintering plate 21, wherein the surface coating is acid-base resistant, moisture-resistant, impact-resistant, wear-resistant, extremely strong in hydrophobicity, non-adhesive and special in chemical stability, and the smooth surface of the sintering plate makes dust difficult to penetrate and stay, even if some extremely fine dust possibly enters the gaps, the extremely fine dust can be blown away by the set pulse compressed air flow, the tail gas containing adhesive dust at the coke outlet area and the furnace top is filtered, most dust and tar mist drops can be removed by the micron-sized filtering aperture, and the spray mist removing tower 3 has extremely high dust removing efficiency and extremely good protection effect.
Referring to fig. 1, an inlet of a spray mist eliminator 3 is fixedly communicated with an exhaust gas collecting pipeline 13 of a tank area exhaust gas collecting system and an outlet of a submerged pool exhaust gas collecting system and an outlet of a sintered plate dust remover 2 by pipelines, a first induced draft fan 31 is arranged on the pipelines, and the first induced draft fan 31 is used for inputting the collected and purified exhaust gas into the spray mist eliminator 3. The spray mist eliminator 3 is designed in a high tower to reduce the floor space, and the bottom of the spray mist eliminator is used as a circulating pool to convey washing circulating water to a spray device in the tower through a circulating water pump 32. The circulating water pump 32 conveys the tower bottom washing circulating water to the spraying device in the tower to wash, cool and cool the tail gas, washes water vapor, dust, partial volatile organic compounds and the like in the tail gas, and utilizes the self height of the spraying defogging tower 3 and the demisting device in the tower to enable water mist particles to gradually become larger from smaller through the processes of air flow aggravation, adsorption, diffusion, condensation, filtration and the like, so that water drops are separated out, and the tail gas after removing large-particle water mist enters the high-efficiency gas-liquid separation tower 4.
Referring to fig. 1 and 3, an inlet of the gas-liquid separation tower 4 is communicated with an outlet of the spray mist eliminator 3, and a high-efficiency vane mist eliminator 41 is arranged in the gas-liquid separation tower 4 and is used for separating liquid drops in tail gas. The efficient vane demister 41 comprises a plurality of guide plates 411 which are arranged side by side, wavy guide grooves 4111 are formed in the surfaces of the guide plates 411, the penetrating direction of the guide grooves 4111 is perpendicular to the flow direction of gas along the guide plates 411, a plurality of baffle plates 412 which are uniformly distributed at intervals are fixedly arranged on two sides of the guide plates 411, bent flow blocking portions 4121 are integrally arranged at two ends of the baffle plates 412, the flow blocking portions 4121 at two ends of the baffle plates 412 are arranged in opposite directions, and the baffle plates 412 are integrally S-shaped. When the gas carrying liquid passes through the efficient vane demister 41, the flow direction of the fluid is changed through the guide plate 411, then the gas carrying the liquid is collided with the baffle 412 in a collision, coalescence adsorption and gravity sedimentation mode, the liquid drops continuously collide with the flow blocking part 4121 of the baffle 412 under the action of inertia force, meanwhile, the liquid drops are combined into larger particles due to the coalescence effect generated by the collision of the surface tension of the liquid drops and the surface of the vane, the liquid drops are absorbed and impact the surface of the vane and are converted into laminar flow, the formed liquid film is collected under the action of gravity of the liquid film and is discharged to the bottom of the tank through the liquid guide channel, so that the efficient separation purpose is achieved, and the efficient gas-liquid separation tower 4 can separate the liquid drops with the size of more than 10 mu m from the gas.
Referring to fig. 1, a combustion system 5 is connected to an outlet of the gas-liquid separation column 4, and the combustion system 5 includes a direct combustion device 51 and a catalytic combustion device 52. The tail gas containing VOCs gas which is processed by the gas-liquid separation tower 4 is clean, dried and can be connected with an air blower to be used as an air distribution direct combustion device 51 for direct combustion without an emission point. The outlet end of the second induced draft fan 53 is connected with the inlet of the catalytic combustion device 52, the catalytic combustion device 52 comprises an activated carbon adsorption box for intercepting volatile organic substances, an activated carbon bed is arranged in the activated carbon adsorption box, and after the activated carbon bed reaches an adsorption saturation state, the intercepted volatile organic substances are oxidized and decomposed into CO 2 and H 2 O under the action of noble metal catalysts such as platinum and palladium taking ceramics as carriers and burning under the condition of low temperature and no flame.
Referring to fig. 1, the energy recovery system 6 includes a plurality of heat exchangers 61, the heat exchangers 61 being connected to the direct combustion system 5 and the exhaust of the catalytic combustion system 5, the heat exchangers 61 being used to recover heat energy generated in the combustion system 5 and to use it for preheating or other heat energy requirements of the coal pyrolysis process.
Referring to fig. 1, condensate collected from a sintered plate dust collector 2, a spray mist eliminator 3, and a high-efficiency gas-liquid separation tower 4 is collected by a condensate collection line 71 and then is concentrated and sent to a wastewater treatment apparatus 7 for treatment.
The implementation principle of the VOCs treatment device for low-temperature pyrolysis of coal in the embodiment is that during operation, a tank area tail gas collection system, a submerged pool tail gas collection system, a furnace top tail gas collection system and a Jiao Dekeng tail gas collection system collect VOCs tail gas through a gas collecting hood 11. The gas-collecting hood 11 is connected to a tail gas collecting pipe 13 for guiding the VOCs tail gas to the subsequent treatment equipment.
Because the furnace top tail gas collecting system and the outlet Jiao Dekeng tail gas collecting system contain more solid dust particles, the tail gas is primarily and coarsely filtered by the pipeline dust remover 14 before entering the subsequent treatment. The top tail gas and the tail gas discharged Jiao Dekeng enter the sintering plate dust remover 2 for preliminary dust removal and purification.
The sintered plate dust remover 2 adopts a wave-shaped sintered plate 21, and removes most dust and tar mist drops through gaps and a coating (PTFE) on the surface of the sintered plate 21.
Then, the tail gas of the tank area, the tail gas of the submerged pool and the tail gas treated by the sintering plate dust remover 2 enter a spray mist removing tower 3. The washing circulating water is conveyed to the spraying device in the tower through the circulating water pump 32, the tail gas is sprayed, the temperature of the tail gas is reduced, and meanwhile, water vapor, dust and volatile organic compounds are removed. And removing large-particle water mist in the tail gas by utilizing the height of the spray mist removing tower 3 and a mist removing device. And then the tail gas treated by the spray mist removing tower 3 enters the high-efficiency gas-liquid separation tower 4. The high-efficiency gas-liquid separation column 4 removes fine droplets, particularly droplets of 10 μm or more, in the exhaust gas by using the high-efficiency vane mist eliminator 41 (including the guide plate 411 and the baffle plate 412). The tail gas treated by the gas-liquid separation tower 4 can enter a direct combustion device 51 for combustion or be subjected to advanced treatment by a catalytic combustion device 52. The catalytic combustor 52 adsorbs VOCs with activated carbon, and when the activated carbon bed is saturated, the VOCs are oxidatively decomposed into CO 2 and H 2 O under a low-temperature flameless condition by the action of a noble metal catalyst. The heat energy generated in the combustion system 5 is recovered by a heat exchanger 61 for preheating or other heat energy requirements of the coal pyrolysis process. The condensate collected from the sintering plate dust collector 2, the spray mist removing tower 3 and the high-efficiency gas-liquid separation tower 4 is intensively treated by the wastewater treatment device 7. The whole device realizes the effective collection, dust removal, spray defogging, gas-liquid separation, combustion treatment and energy recovery of VOCs tail gas generated in the coal pyrolysis process by integrating a plurality of processing units, thereby reducing the environmental pollution and improving the resource utilization efficiency.
The above embodiments are not intended to limit the scope of the application, so that the equivalent changes of the structure, shape and principle of the application are covered by the scope of the application.
Claims (6)
1. A VOCs administers device for coal pyrolysis by low temperature, its characterized in that includes:
The tail gas collecting system (1) comprises a tank area tail gas collecting system, a submerged pool tail gas collecting system, a furnace top tail gas collecting system and a discharge Jiao Dekeng tail gas collecting system, wherein the tank area tail gas collecting system, the submerged pool tail gas collecting system, the furnace top tail gas collecting system and the discharge Jiao Dekeng tail gas collecting system all comprise a gas collecting hood (11), a breather valve (12) and a tail gas collecting pipeline (13) which are positioned in a collecting area, the breather valve (12) is communicated through the tail gas collecting pipeline (13), and the tail gas collecting pipeline (13) of the furnace top tail gas collecting system and the discharge Jiao Dekeng tail gas collecting system (1) is also connected with a pipeline dust remover (14);
the inlet of the sintering plate dust remover (2) is communicated with a furnace top tail gas collecting system and a tail gas collecting pipeline (13) of the outlet Jiao Dekeng tail gas collecting system, and the sintering plate dust remover (2) is used for primarily removing dust and purifying the collected tail gas;
The inlet of the spray mist removing tower (3) is communicated with a tank area tail gas collecting system, a tail gas collecting pipeline (13) of the submerged pool tail gas collecting system and an outlet of the sintering plate dust remover (2), and a spray device is arranged in the spray mist removing tower (3) and is used for washing, cooling and cooling the collected tail gas;
The inlet of the gas-liquid separation tower (4) is connected with the outlet of the spray mist-removing tower (3), and a high-efficiency vane mist-removing device (41) is arranged in the gas-liquid separation tower (4) and used for separating liquid drops in tail gas;
the combustion system (5) is connected with the outlet of the high-efficiency gas-liquid separation tower (4), the combustion system (5) comprises a direct combustion device (51) and a catalytic combustion device (52), and the catalytic combustion device (52) comprises an activated carbon adsorption box and is used for intercepting volatile organic substances;
And wastewater treatment devices (7) for treating the condensate collected from the respective treatment devices.
2. The VOCs treatment apparatus for coal pyrolysis according to claim 1, further comprising an energy recovery system (6), wherein the energy recovery system (6) is configured to recover heat energy generated in the combustion system (5), and wherein the energy recovery system (6) comprises a heat exchanger (61), and wherein the heat exchanger (61) is connected to a discharge port of the combustion system (5).
3. The VOCs treatment device for coal pyrolysis according to claim 1, wherein the spray mist eliminator (3) is designed in a high tower so as to reduce the occupied area, the bottom of the spray mist eliminator is used as a circulating pool, and washing circulating water is conveyed to the spray device in the tower through a circulating water pump (32).
4. The VOCs treatment device for low-temperature pyrolysis of coal according to claim 3, wherein the high-efficiency vane demisting device (41) comprises a plurality of guide plates (411), wavy guide grooves (4111) are formed in the surfaces of the guide plates (411), the penetrating direction of the guide grooves (4111) is perpendicular to the flow direction of gas along the guide plates (411), a plurality of baffle plates (412) which are uniformly distributed at intervals are fixedly arranged on two sides of the guide plates (411), bent flow blocking portions (4121) are integrally arranged at two ends of the baffle plates (412), the flow blocking portions (4121) at two ends of the baffle plates (412) are arranged in opposite directions, and the baffle plates (412) are integrally S-shaped.
5. The VOCs treatment device for low-temperature pyrolysis of coal according to claim 1, wherein the filter element inside the sintering plate dust remover (2) adopts a plurality of sintering plates (21), the plurality of sintering plates (21) are vertically arranged in parallel inside the sintering plate dust remover (2), and the surface of the sintering plates (21) perpendicular to the airflow direction is provided with wave-shaped aggregation grooves.
6. The VOCs treatment apparatus for coal pyrolysis according to claim 5, wherein the surface of the sintering plate (21) is coated with PTFE coating.
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| CN202421467565.6U CN222816523U (en) | 2024-06-25 | 2024-06-25 | A VOCs treatment device for low-temperature pyrolysis of coal |
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| CN202421467565.6U CN222816523U (en) | 2024-06-25 | 2024-06-25 | A VOCs treatment device for low-temperature pyrolysis of coal |
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Effective date of registration: 20250916 Address after: 710000 Shaanxi Province Xi'an City Gaoxin District Keji Fourth Road No. 187 Qintang Building 12 No. 3 Building Patentee after: SHAANXI HUAXIANG ENERGY TECHNOLOGY GROUP Co.,Ltd. Country or region after: China Address before: Building 3, Building 12, Qintang, Keji 4th Road, High tech Zone, Xi'an City, Shaanxi Province 710000 Patentee before: Mao Shaoxiang Country or region before: China |
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