WO2018192564A1 - 一种生活垃圾热解焚烧装置烟气净化系统 - Google Patents
一种生活垃圾热解焚烧装置烟气净化系统 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
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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
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
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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
- B01D53/75—Multi-step processes
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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
- B01D53/81—Solid phase processes
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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
- B01D53/8659—Removing halogens or halogen compounds
- B01D53/8662—Organic halogen compounds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
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- 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
- F23J15/006—Layout of treatment plant
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- 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
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- 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
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- 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
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- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/93—Toxic compounds not provided for in groups B01D2257/00 - B01D2257/708
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/30—Halogen; Compounds thereof
- F23J2215/301—Dioxins; Furans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/10—Intercepting solids by filters
- F23J2217/101—Baghouse type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/50—Intercepting solids by cleaning fluids (washers or scrubbers)
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Definitions
- the invention relates to a system for treating and disposing of domestic garbage and utilizing resources, in particular to a flue gas purification system for a domestic waste pyrolysis incineration device.
- Sanitary landfill is the main way of garbage disposal in China.
- This treatment method is simple in technology and large in processing capacity, but it takes up too much land resources, and there are problems such as difficult site selection, leachate pollution, greenhouse gas emissions, etc. Resource utilization.
- the waste heat treatment technology has obvious advantages in reducing capacity, reducing volume and utilizing resources.
- the new waste incineration technology has received the attention of the state in recent years and will be the main direction of waste disposal and resource utilization in the future.
- the heat treatment technology essentially oxidizes and decomposes the garbage at high temperature to form a stable solid residue.
- a large amount of harmful gas is released, and dust and fine particles fly with the wind, resulting in various pollutant indexes in the air.
- Exceeding the standard and will produce a large number of strong carcinogenic substances, dioxin, which is the main factor that restricts the pyrolysis incineration treatment technology.
- the dry process purification efficiency is relatively low, and it is used more in the construction of incineration plants in Japan in recent years.
- the wet purification process has the highest purification efficiency of pollutants and can meet the most stringent emission standards.
- due to the complicated process and many supporting equipments the one-time investment and operating costs are high. It is widely used in economically developed countries and is not widely used in China.
- NOx removal the SCR has a NOx removal rate of more than 90%, and the SNCR removal rate of NOx can reach about 50%.
- cost-efficiency analysis SCR and advanced incineration control systems are roughly equivalent and significantly more expensive than SNCR technology.
- the flue gas generated by the domestic waste incineration process mainly contains harmful substances such as SO 2 , HCl, NOx, heavy metals and dioxins.
- dioxin pollution has caused widespread concern among people all over the world, and waste incineration plants are one of the main sources of dioxins, due to the current formation of dioxins.
- the mechanism has not yet reached a unified consensus, so the control of incineration parameters is only used to suppress the formation of dioxins, and the effect is difficult to determine, so the subsequent treatment of dioxins becomes especially critical.
- the emission standards for waste incineration flue gas are becoming more and more strict.
- Dioxins are from the original 1mg/m 3 to 0.5mg/m 3 , and now to 0.1mg/m 3 , for dioxins. There is also a need for new changes in processing.
- the invention provides a flue gas purification system for a domestic waste pyrolysis incineration device, which can effectively remove pollutants in the incineration flue gas, including CO, SO 2 , NO X , dioxin, etc., especially for the digestible dioxins Multi-stage treatment of British pollutants, the concentration of dioxin in the flue gas is better than the national emission standards, and has played the role of environmental protection.
- Flue gas purification system for domestic garbage pyrolysis incineration device including quenching tower, electromagnetic pulse dust collector, waste heat utilization and cooling device, carbon fiber filter device, heat exchange device, dioxin chemical catalytic device, water supply system, flue gas pipeline And an induced draft fan; characterized in that the inlet end of the quenching tower is connected with the flue gas pipeline of the domestic garbage pyrolysis incinerator, the outlet end of the quenching tower is connected with the electromagnetic pulse dust collector, and the electromagnetic pulse dust collector is connected with the waste heat utilization and the cooling device.
- the waste heat utilization and cooling device are connected to the carbon fiber filter device, the carbon fiber filter device is connected to the induced draft fan, the outlet of the induced draft fan is connected to the heat exchange device, and the outlet of the heat exchange device is connected with the dioxin chemical catalytic device, dioxin chemistry
- the catalytic device is connected to the chimney, and the flue gas is finally discharged into the atmosphere through a series of purification.
- the upper part of the quenching tower is provided with a spray pipe; after the temperature is lowered, the temperature of the flue gas is 160 ° C - 180 ° C.
- the electromagnetic pulse dust collector is composed of a plurality of cloth bags, and the pollutants in the flue gas are adsorbed on the surface of the filter bag.
- the electromagnetic pulse dust collector is provided with a pulse valve.
- An auxiliary feeding device is installed on the flue gas pipeline between the quenching tower and the electromagnetic pulse dust collector; calcium hydroxide and a reaction auxiliary agent are added to remove various acid gases and dioxins in the flue gas, The flue gas temperature is reduced to 100 ° C - 140 ° C.
- the waste heat utilization and cooling device is connected between the electromagnetic pulse dust collector and the carbon fiber filter device; the flue gas after the heat energy utilization is re-entered into the cooling device to reduce the flue gas temperature to 40 ° C - 60 ° C.
- the carbon fiber filter device is composed of an orderly arrangement of a plurality of carbon fiber filter elements.
- the induced draft fan is located behind the carbon fiber filter device and adopts frequency conversion speed regulation to ensure the furnace pressure required for the pyrolysis incinerator under different working conditions.
- the heat exchange device is located above the pyrolysis incinerator; the temperature reaches 210 ° C - 250 ° C.
- the dioxin chemical catalytic device is composed of a plurality of catalyst modules, and the whole is an erected rectangular parallelepiped.
- the catalyst in the module can catalytically oxidize and decompose dioxin to form harmless substances.
- the main function of the quenching tower is to cool the flue gas generated by the waste pyrolysis incinerator, wherein the quenching tower is provided with a spray pipe on the upper part, the spray pipe is installed on the upper part of the quenching tower, and the cooling water is sprayed from the spray Sprayed in the shower tube, the flue gas is cooled sharply, and the cooling water is recycled.
- the electromagnetic pulse dust collector is composed of a plurality of cloth bags, and the pollutants in the flue gas are adsorbed on the surface of the filter bag, which can effectively remove acid and adsorb harmful gases such as dioxins.
- the electromagnetic pulse dust collector is provided with a pulse valve, each time opening a group of pulse valves to remove the dust of the part of the bag or the filter cylinder controlled by the bag, and the other bags or filter cartridges work normally, after a period of time, the next group The pulse valve is opened to clean the next part of the dust collector.
- An auxiliary feeding device is installed on the flue gas pipeline between the quenching tower and the electromagnetic pulse dust collector, and calcium hydroxide and a reaction auxiliary agent (activated carbon powder) are added to remove various acid gases in the flue gas and Dioxins.
- the carbon fiber filter device is composed of a plurality of carbon fiber filter elements arranged in an orderly manner, and can further filter and adsorb harmful gases such as dioxins in the flue gas.
- the induced draft fan is located after the carbon fiber filter device, and adopts frequency conversion speed regulation, and the first function is to ensure the pressure of the furnace required by the pyrolysis incinerator under different working conditions, and the second is to export the carbon fiber filter device. Flue gas is drawn to the heat exchange device.
- the heat exchange device is located above the pyrolysis incinerator, and the flue gas is sent to the heat exchange device by the induced draft fan to perform temperature rising treatment.
- the dioxin chemical catalytic device is composed of a plurality of catalyst modules, and the whole is an erected rectangular parallelepiped.
- the catalyst in the module can catalytically oxidize and decompose dioxin to form harmless water vapor, carbon dioxide, hydrogen chloride and the like.
- the service life is more than 16,000 hours.
- the present invention has the following beneficial effects:
- the system can purify the flue gas discharged from the thermal incineration of domestic garbage even better than the national standard, and consider using the sensible heat in the flue gas to produce low-pressure steam for production and use;
- the system adopts two-stage treatment of dioxins in flue gas, and the concentration of dioxins after treatment can reach better than national standards;
- the system will be heated by the flue gas inhalation heat exchange device of the carbon fiber filter device, which is beneficial to the subsequent treatment of the dioxin chemical catalytic device;
- the system has only two pumps, one air pump and one induced draft fan, which reduces the auxiliary equipment, increases the safety and reliability of the system, and reduces the operating cost of the system;
- the flue gas purification system of the domestic waste pyrolysis incinerator provided by the invention can effectively remove pollutants in the incineration flue gas, including CO, SO 2 , NO X , dioxin, etc., especially in the flue gas.
- the concentration of dioxin can meet national standards ( ⁇ 0.03 ng/m 3 ).
- Figure 1 Schematic diagram of the flue gas purification system of the domestic waste pyrolysis incinerator.
- FIG. 1 is a schematic structural diagram of a flue gas purification system for a domestic garbage pyrolysis incinerator according to an embodiment of the present invention.
- the embodiment of the invention provides a flue gas purification system for a domestic waste pyrolysis incinerator, which comprises a quenching tower (2), an electromagnetic pulse dust collector (3), a waste heat utilization and cooling device (4), and a carbon fiber filtering device (5).
- heat exchange device (7) heat exchange device (7), dioxin chemical catalytic device (8), water supply system, flue gas duct and induced draft fan (6), the inlet end of the quenching tower (2) and the smoke of the domestic waste pyrolysis incinerator a gas pipe connection, an outlet end of the quenching tower (2) is connected to the electromagnetic pulse dust collector (3), and the electromagnetic pulse dust collector (3) is connected with a waste heat utilization and a cooling device (4), and the waste heat utilization Connected to the cooling device (4) and the carbon fiber filtering device (5), the carbon fiber filtering device (5) is connected to the induced draft fan (6), and the flue gas is sent through the induced draft fan (6) After the heating device (7) is warmed up, it enters the dioxin chemical catalytic device (8), and the dioxin chemical catalytic device (8) is connected to the chimney (9), and the flue gas is finally discharged into the atmosphere through a series of purification.
- a spray pipe (12) is disposed on an upper portion of the quenching tower (2), and the spray pipe (12) is installed at an upper portion of the quenching tower, and cooling water is sprayed from the spray pipe 12.
- the electromagnetic pulse dust collector (3) is composed of a plurality of bags (13), and the pollutants in the flue gas are adsorbed on the surface of the filter bag, which can effectively remove acid and adsorb harmful gases such as dioxins.
- the flue gas pipeline between the quenching tower (2) and the electromagnetic pulse dust collector (3) is equipped with an auxiliary dosing device 1 (10), an auxiliary dosing device 2 (11), and a hydroxide is added. Calcium and a reaction aid (activated carbon powder) to remove various acid gases and dioxins in the flue gas.
- the main parts of the domestic waste pyrolysis incinerator flue gas purification system are equipped with thermocouples, and the PLC automatic control system is used to monitor the temperature change, and at the same time, the dosing of the auxiliary agent and the power of the fan can be controlled.
- the domestic garbage is thermally decomposed in the pyrolysis incinerator (1).
- the diameter of the furnace body is 1.2m and the height is 1.88m.
- the Q235 carbon steel is used, the inner layer is refractory high temperature material, and the outer wall steel plate is 6mm thick.
- the inner steel plate is 8mm thick, the refractory material layer is 100mm thick, the working time is 8-10h, the processing capacity is 10t/d, and the furnace temperature can reach 700°C-900°C.
- the flue gas generated by the pyrolysis incineration is sent to the quenching tower (2) through a flue gas duct, and the sprinkling pipe (12) in the quenching tower (2) starts to spray water, and the cooling water sharply changes the flue gas. Cooling, and the cooling water can be recycled. After cooling, the temperature of the flue gas is reduced to 160 °C-180 °C. After cooling, the calcium hydroxide is added to the flue gas pipeline through the auxiliary feeding device 1 (10).
- the dosage is adjusted by PLC automatic control system, mainly reducing various acid gases and dioxins in flue gas, Calcium hydroxide neutralizes the acid gas, and the activated carbon powder adsorbs dioxins.
- the temperature is attenuated to 100° C.-140° C., wherein unreacted calcium hydroxide and a reaction auxiliary agent (activated carbon powder) enter the electromagnetic pulse bag filter (3). Adsorbed on the surface of the filter bag, which can effectively remove acid and adsorb harmful gases such as dioxins.
- the content of particulate matter in the flue gas is reduced to less than 5 mg/m 3 , the NOx is reduced to about 400 mg/m 3 , and the SO 2 is reduced to 100 mg/m 3 . Left and right, dioxin is reduced to 2 to 3 ng/m 3 . Because the temperature required for carbon fiber adsorption is low, the high-temperature flue gas pipeline section of the electromagnetic pulse dust collector (3) is provided with the waste heat recovery and utilization device (4), and the heat energy of the high-temperature flue gas is collected by the heat exchange device. The flue gas after the heat energy is used to enter the cooling device to continue to cool down, so that the flue gas temperature is lowered to 40 ° C -60 ° C.
- the carbon fiber filtering device (5) is arranged, and the device is composed of a plurality of carbon fiber filter elements arranged in an orderly manner, and the amount of the activated carbon adsorbing material is 150 kg, which can be pickled to further carry out harmful gases such as dioxins in the flue gas. Filtration adsorption, the dioxin content in the treated flue gas is reduced to less than 1 ng / m 3 .
- the induced draft fan (6) is disposed behind the carbon fiber filtering device (5), and the induced draft fan (6) adopts frequency conversion speed regulation, and the first function thereof is to ensure the garbage pyrolysis incineration device (1) under different working conditions.
- the required furnace pressure is such that the pyrolysis incinerator is in a negative pressure state; the second is that the carbon fiber filtering device (5) outlet flue gas is sucked into the heat exchange device (7) because of the new type adopted
- the dioxin catalyst is suitable for a temperature of 180 ° C to 250 ° C, and the flue gas reaches 210 ° C to 250 ° C through the heat exchange device (7), and then enters the dioxin chemical catalytic device (8).
- the device is composed of a plurality of catalyst modules, and the whole is an erected rectangular parallelepiped.
- the catalyst is a new deodorized catalyst developed by a company in Shanghai.
- the catalyst is honeycomb or granular, and the catalyst in the module can be dioxins.
Abstract
Description
Claims (10)
- 一种生活垃圾热解焚烧装置烟气净化系统,包括急冷塔、电磁脉冲除尘器、余热利用与冷却装置、炭纤维过滤装置、换热装置、二噁英化学催化装置、供水系统、烟气管道和引风机;其特征是急冷塔的进口端与生活垃圾热解焚烧装置的烟气管道连接,急冷塔的出口端与所述电磁脉冲除尘器连接,电磁脉冲除尘器与余热利用与冷却装置连接,余热利用与冷却装置与所述炭纤维过滤装置连接,炭纤维过滤装置与所述引风机连接,引风机出口连接换热装置,换热装置出口连接二噁英化学催化装置,二噁英化学催化装置与烟囱连接,烟气经过一系列净化最终排入大气。
- 如权利要求1所述的装置,其特征是所述急冷塔内上部布有喷淋管;经过降温后烟气温度为160℃-180℃。
- 如权利要求1所述的装置,其特征是所述电磁脉冲除尘器内由许多布袋组成,烟气中的污染物吸附在滤袋表面。
- 如权利要求1所述的装置,其特征是所述电磁脉冲除尘器设有脉冲阀,每次开一组脉冲阀来除去它所控制的那部分布袋或滤筒的灰尘,而其他的布袋或滤筒正常工作,隔一段时间后下一组脉冲阀打开,清理下一部分所述除尘器。
- 如权利要求1所述的装置,其特征是所述急冷塔和所述电磁脉冲除尘器之间的烟气管道上安装有助剂投加装置;投加氢氧化钙和反应助剂,去除烟气中的各种酸性气体及二噁英,烟气温度减到100℃-140℃。
- 如权利要求1所述的装置,其特征是在所述电磁脉冲除尘器和所述炭纤维过滤装置之间连接余热利用与冷却装置;热能利用后的烟气再进入冷却装置,使烟气温度降至40℃-60℃。
- 如权利要求1所述的装置,其特征是所述炭纤维过滤装置由若干个炭纤维滤芯有序排列组成。
- 如权利要求1所述的装置,其特征是所述引风机位于所述炭纤维过滤装置后,采用变频调速,保证在不同工况下热解焚烧装置所需要的炉堂压力。
- 如权利要求1所述的装置,其特征是所述换热装置位于热解焚烧炉的上方;温度达到210℃-250℃。
- 如权利要求1所述的装置,其特征是所述二噁英化学催化装置是由若干个催化剂模块组合而成,整体为一竖立的长方体,模块内的催化剂能将二噁英催化氧化分解,生成无害物质。
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