CN209771798U - Urban sludge incineration flue gas purification system - Google Patents
Urban sludge incineration flue gas purification system Download PDFInfo
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- CN209771798U CN209771798U CN201920121925.XU CN201920121925U CN209771798U CN 209771798 U CN209771798 U CN 209771798U CN 201920121925 U CN201920121925 U CN 201920121925U CN 209771798 U CN209771798 U CN 209771798U
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- flue gas
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- urea solution
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 239000003546 flue gas Substances 0.000 title claims abstract description 150
- 239000010802 sludge Substances 0.000 title claims abstract description 32
- 238000000746 purification Methods 0.000 title claims abstract description 16
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000004202 carbamide Substances 0.000 claims abstract description 44
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 40
- 230000003009 desulfurizing Effects 0.000 claims abstract description 40
- 239000000428 dust Substances 0.000 claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims abstract description 14
- 230000001105 regulatory Effects 0.000 claims abstract description 8
- 238000010521 absorption reaction Methods 0.000 claims description 65
- 239000002002 slurry Substances 0.000 claims description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 239000007921 spray Substances 0.000 claims description 21
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 25
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 12
- 239000007789 gas Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 229910002089 NOx Inorganic materials 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitrogen oxide Substances O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating Effects 0.000 description 2
- 230000000711 cancerogenic Effects 0.000 description 2
- 231100000315 carcinogenic Toxicity 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 125000001741 organic sulfur group Chemical group 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001868 water Inorganic materials 0.000 description 2
- 206010000372 Accident at work Diseases 0.000 description 1
- 206010000496 Acne Diseases 0.000 description 1
- 206010007554 Cardiac failure Diseases 0.000 description 1
- 206010011878 Deafness Diseases 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 206010019233 Headache Diseases 0.000 description 1
- 206010019280 Heart failure Diseases 0.000 description 1
- 206010022437 Insomnia Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 206010073310 Occupational exposure Diseases 0.000 description 1
- 210000003491 Skin Anatomy 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 231100000244 chromosomal damage Toxicity 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 231100000895 deafness Toxicity 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 201000010235 heart cancer Diseases 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 230000002427 irreversible Effects 0.000 description 1
- 230000001665 lethal Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003505 mutagenic Effects 0.000 description 1
- 231100000219 mutagenic Toxicity 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052813 nitrogen oxide Inorganic materials 0.000 description 1
- 231100000675 occupational exposure Toxicity 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000003390 teratogenic Effects 0.000 description 1
- 231100000378 teratogenic Toxicity 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000048 toxicity data Toxicity 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model discloses an urban sludge incineration flue gas purification system. The device comprises a denitration device, a flue gas heat exchanger, a bag-type dust remover and a desulfurization device which are arranged in sequence; the flue gas heat exchanger is communicated with the bag-type dust collector through the flue gas communicating pipeline; the bag-type dust collector is communicated with the desulfurization device through the flue gas communication pipeline; the denitration device comprises a urea solution storage tank and a urea solution communication pipeline going to the flue gas communication pipeline, a double-fluid nozzle module is arranged in the flue gas communication pipeline, one end of the urea solution communication pipeline is communicated with the lower part of the urea solution storage tank, and the other end of the urea solution communication pipeline is communicated with the double-fluid nozzle module; a urea solution pump and a urea flow regulating valve are sequentially arranged on an outlet pipeline of the urea solution storage tank; and the flue gas outlet of the desulfurization device is communicated into the flue gas heat exchanger through the flue gas communication pipeline. The utility model has the advantages of promote the flue gas purification level, reduce the investment and the running cost of system.
Description
Technical Field
The utility model relates to an urban sludge incineration flue gas purification system, more specifically say that it is an urban sludge incineration flue gas purification system that sulfur dioxide and dioxin were got rid of in the sludge incineration flue gas that is applicable to it.
Background
the sludge incineration waste gas contains a large amount of odor (such as ammonia and H)2S and other odoriferous components), NOx, SO2Particulate matter such as carcinogenic dioxin, suspended unburned or partially burned waste, and ash.
In municipal sludge, sulfur is present in the form of organic sulfur. Organic sulfur is decomposed at high temperature to form sulfur dioxide gas, and the sulfur dioxide gas released by municipal sludge is 4 times higher than that released by coal under the same condition. Sulfur dioxide is discharged into the atmosphere without being treated, so that the atmospheric environment is polluted, acid rain is formed, and the harm is caused to the human health and the natural environment.
Meanwhile, flue gas generated in the sludge incineration process usually contains dioxin substances, and a large number of animal experiments show that the dioxin substances with very low concentration have lethal effect on animals. Some dioxin toxicity data and clinical manifestations to human bodies are obtained from occupational exposure and industrial accident victims, and the exposure to the environment containing PCDDs and PCDFs can cause skin acne, headache, deafness, depression, insomnia and the like, and can cause chromosome damage, heart failure, cancer and the like. The greatest risk is irreversible teratogenic, carcinogenic, mutagenic (triprodogenic) toxicity.
therefore, the flue gas generated after the incineration of the municipal sludge needs to be purified to remove sulfur dioxide, nitrogen oxides and dioxin, so as to reach the emission standard.
disclosure of Invention
The utility model aims at providing an urban sludge burns gas cleaning system accomplishes the purification to the sludge incineration flue gas, promotes the gas cleaning level, reduces the investment and the running cost of system simultaneously, solves the problem that the sludge incineration in-process produced sulfur dioxide and dioxin, guarantees that sulfur dioxide concentration is less than 35mg/m in the emission flue gas3Dioxin concentration less than 0.1ng TEQ/Nm3。
In order to realize the purpose, the technical scheme of the utility model is that: the utility model provides an urban sludge incineration flue gas clean system which characterized in that: the device comprises a denitration device, a flue gas heat exchanger, a bag-type dust remover, a desulfurization device and a flue gas communicating pipeline which are arranged in sequence; the flue gas heat exchanger is communicated with the bag-type dust collector through the flue gas communicating pipeline; the bag-type dust collector is communicated with the desulfurization device through the flue gas communication pipeline;
the denitration device comprises a urea solution storage tank and a urea solution communicating pipeline going to the flue gas communicating pipeline, a double-fluid nozzle module is arranged in the flue gas communicating pipeline and between the municipal sludge incineration end and the flue gas heat exchanger, one end of the urea solution communicating pipeline is communicated with the lower part of the urea solution storage tank, and the other end of the urea solution communicating pipeline is communicated with the double-fluid nozzle module; a urea solution pump and a urea flow regulating valve are sequentially arranged on an outlet pipeline of the urea solution storage tank;
A Venturi mixer is arranged on the flue gas communicating pipeline and between the flue gas heat exchanger and the bag-type dust remover, and an active carbon communicating pipeline is introduced into the Venturi mixer;
The desulfurization device comprises a desulfurization device flue gas inlet arranged in the middle and a desulfurization device flue gas outlet arranged at the upper end; and the flue gas outlet of the desulfurization device is communicated into the flue gas heat exchanger through the flue gas communication pipeline.
In the technical scheme, a compressed air communication pipeline is introduced into the double-fluid nozzle module, and a compressed air flow regulating valve is arranged on the compressed air communication pipeline.
In the technical scheme, the bag-type dust collector is provided with a bag-type dust collector flue gas inlet positioned at the lower part of the side wall, a bag-type dust collector flue gas outlet positioned at the upper part of the side wall and an activated carbon outlet arranged at the lower end; and the flue gas outlet of the bag-type dust collector is communicated with the flue gas inlet of the desulfurization device through the flue gas communicating pipeline.
in the above technical solution, the desulfurization device further includes an absorption tower, an absorption tower spray layer, an absorption tower demister and an absorption tower slurry pool, the desulfurization device flue gas inlet is disposed on the side wall of the absorption tower, the desulfurization device flue gas outlet is disposed at the top end of the absorption tower, the absorption tower spray layer, the absorption tower demister and the absorption tower slurry pool are disposed in the absorption tower, the absorption tower spray layer is disposed above the desulfurization device flue gas inlet side, and the absorption tower demister is disposed above the absorption tower spray layer; and a slurry circulating branch is arranged on the side wall of the absorption tower, one end of the slurry circulating branch is communicated with the slurry pool of the absorption tower, the other end of the slurry circulating branch is communicated with the spray layer of the absorption tower, and a slurry circulating pump is arranged on the slurry circulating branch.
In the technical scheme, the absorption tower spraying layer is provided with a plurality of layers, and each layer of the absorption tower spraying layer is provided with the slurry circulating branch.
The utility model has the advantages of as follows:
(1) The utility model discloses can solve the problem that produces sulfur dioxide and dioxin among the sludge incineration process, guarantee to discharge sulfur dioxide concentration in the flue gas and be less than 35mg/m3dioxin concentration less than 0.1ng TEQ/Nm3(ii) a Overcomes the defect that the incineration flue gas treated by the prior common treatment mode still contains higher sulfur dioxide and dioxin (the concentration of the sulfur dioxide in the incineration flue gas generated by the incineration of municipal sludge is about 2000mg/m3Dioxin concentrateThe degree is about 78TEQ/Nm3(ii) a After the incineration flue gas is treated by the conventional common method, the concentration of sulfur dioxide in the purified flue gas is about 80mg/m3Dioxin concentration of about 0.5ng TEQ/Nm3)；
(2) The utility model discloses the completion promotes the flue gas purification level to the purification of sludge incineration flue gas, has reduced the investment and the running cost of system simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1-a denitration device, 1.1-a urea solution storage tank, 1.2-a urea solution communicating pipeline, 1.21-a urea solution pump, 1.22-a urea flow regulating valve, 2-a flue gas heat exchanger, 3-a bag-type dust remover, a 3.1-a bag-type dust remover flue gas inlet, a 3.2-a bag-type dust remover flue gas outlet, a 3.3-an activated carbon outlet, a 4-a desulphurization device, a 4.1-a desulphurization device flue gas inlet, a 4.2-a desulphurization device flue gas outlet, a 4.3-an absorption tower, a 4.4-an absorption tower spraying layer, a 4.5-an absorption tower demister, a 4.6-an absorption tower slurry pool, a 4.7-slurry circulating branch, a 4.71-slurry circulating pump, a 5-a flue gas communicating pipeline, a 5.1-two-fluid nozzle module, a 6-a compressed air communicating pipeline and a 6.1-a compressed air, 7-Venturi mixer, 7.1-active carbon communicating pipeline.
Detailed Description
the following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily appreciated by the description.
with reference to the accompanying drawings: a municipal sludge incineration flue gas purification system comprises a denitration device 1, a flue gas heat exchanger 2, a bag-type dust collector 3, a desulfurization device 4 and a flue gas communicating pipeline 5 which are arranged in sequence, wherein the desulfurization device 4 is communicated with the flue gas heat exchanger 2 through the flue gas communicating pipeline 5; the flue gas heat exchanger 2 is communicated with the bag-type dust collector 3 through the flue gas communicating pipeline 5; the bag-type dust collector 3 is communicated with the desulfurization device 4 through the flue gas communication pipeline 5; the flue gas heat exchanger of the utility model adopts a gas-gas heat exchange mode, and the original flue gas and the clean flue gas carry out countercurrent heat exchange, and the flue gas heat exchanger 2 of the utility model utilizes the heat of the original flue gas to heat the clean flue gas discharged from the flue gas outlet of the desulphurization device through the heat exchanger; the heat exchange mode of the flue gas heat exchanger 2 of the utility model can reduce the inlet flue gas temperature of the bag-type dust remover so as to protect the bag-type dust remover;
The denitration device 1 comprises a urea solution storage tank 1.1 and a urea solution communication pipeline 1.2 going to the flue gas communication pipeline 5, a double-fluid nozzle module 5.1 is arranged in the flue gas communication pipeline 5 and between the municipal sludge incineration end and the flue gas heat exchanger 2, one end of the urea solution communication pipeline 1.2 is communicated with the lower part of the urea solution storage tank 1.1, and the other end of the urea solution communication pipeline is communicated with the double-fluid nozzle module 5.1; a urea solution pump 1.21 and a urea flow regulating valve 1.22 are sequentially arranged on an outlet pipeline of the urea solution storage tank 1.1; the utility model discloses denitrification facility adopts urea as absorbent, gets rid of the NOx in burning the flue gas, saves 50% -80% than adopting the investment of selective catalytic reduction method (SCR) and non-catalytic reduction method (SNCR) technique, and the operation saves 60% -80% with the maintenance cost, and takes off NOx simple process;
A Venturi mixer 7 is arranged on the flue gas communicating pipeline 5 and between the flue gas heat exchanger 2 and the bag-type dust collector 3, and an active carbon communicating pipeline 7.1 is introduced into the Venturi mixer 7;
The desulfurization device 4 comprises a desulfurization device flue gas inlet 4.1 arranged at the middle part and a desulfurization device flue gas outlet 4.2 arranged at the upper end; and the flue gas outlet 4.2 of the desulfurization device is communicated with the flue gas heat exchanger 2 through the flue gas communicating pipeline 5.
a compressed air communication pipeline 6 is communicated into the double-fluid nozzle module 5.1, and a compressed air flow regulating valve 6.1 is arranged on the compressed air communication pipeline 6.
The bag-type dust collector 3 is provided with a bag-type dust collector flue gas inlet 3.1 positioned at the lower part of the side wall, a bag-type dust collector flue gas outlet 3.2 positioned at the upper part of the side wall and an activated carbon outlet 3.3 arranged at the lower end; the flue gas outlet 3.2 of the bag-type dust collector is communicated with the flue gas inlet 4.1 of the desulphurization device through the flue gas communicating pipeline 5; the bag-type dust collector 3 and the venturi mixer 7 of the utility model spray active carbon, and the active carbon is used for absorbing dioxin particles suspended in the waste gas and purifying the waste gas; the bag-type dust collector removes dust generated by the desulfurization and denitrification process and active carbon adsorbing dioxin.
The desulfurization device 4 further comprises an absorption tower 4.3, an absorption tower spray layer 4.4, an absorption tower demister 4.5 and an absorption tower slurry pool 4.6, wherein a desulfurization device flue gas inlet 4.1 is formed in the side wall of the absorption tower 4.3, a desulfurization device flue gas outlet 4.2 is formed in the top end of the absorption tower 4.3, the absorption tower spray layer 4.4, the absorption tower demister 4.5 and the absorption tower slurry pool 4.6 are formed in the absorption tower 4.3, the absorption tower spray layer 4.4 is formed above the desulfurization device flue gas inlet 4.1, and the absorption tower demister 4.5 is formed above the absorption tower spray layer 4.4; a slurry circulation branch 4.7 is arranged on the side wall of the absorption tower 4.3, one end of the slurry circulation branch 4.7 is communicated with the slurry pool 4.6 of the absorption tower, the other end is communicated with the spray layer 4.4 of the absorption tower, and a slurry circulation pump 4.71 is arranged on the slurry circulation branch 4.7.
The absorption tower spraying layer 4.4 has a plurality of layers, each layer of the absorption tower spraying layer 4.4 is provided with the slurry circulation branch 4.7 (as shown in figure 1), sulfide is contained in sludge incineration flue gas, and the sludge incineration flue gas also contains some acidic gases such as HCl and HF, and the concentration change of flue gas pollutants generated by incineration is large due to large fluctuation of sludge components, so that the desulfurization device has strong adaptability to pollutant concentration fluctuation, and can ensure that the acidic gas reaches the standard all the time; the utility model discloses desulphurization unit adopts caustic soda as the absorbent, improves deacidification efficiency.
In fig. 1, the arrows in the flue gas communication duct 5 represent the incineration flue gas flow direction; the hollow arrows in the absorption column 4.3 represent the incineration flue gas flow direction.
Flue gas heat exchanger, sack cleaner, venturi mixer be prior art.
Urban sludge burns gas cleaning system's working process as follows:
The method comprises the following steps: in municipal sludge burns flue gas and gets into flue gas communicating pipe 5, through locating two fluid nozzle module 5.1 in the flue gas communicating pipe 5, urea solution in the urea solution storage tank 1.1 passes through urea solution pump 1.21 pump income two fluid nozzle module 5.1, two fluid nozzle module 5.1 sprays urea solution, compressed air communicating pipe 6 lets in two fluid nozzle module 5.1's compressed air, compressed air's volume is adjusted through compressed air flow governing valve 6.1, it burns flue gas and absorbent (urea solution) intimate contact, increase area of contact, and the urea that contains in the spray liquid can react with NOx, generate nitrogen gas, can get rid of NOx in the burning flue gas effectively, the advantage is that: the structure is simple, the manufacturing cost is low, and the purification efficiency is high; the raw materials are oxygen and urea, the materials are cheap and easy to obtain, the reaction products are carbon dioxide, nitrogen and water, secondary polluted water bodies are not generated, solid particle pollutants in waste gas can be purified, gaseous pollutants can be removed, the gas cooling effect can be achieved, oily components can be generated in the burning process, the alkaline liquor can be used for removing the oily components well, and the subsequent equipment is protected;
Step two: the incinerated flue gas after denitration exchanges heat with purified flue gas through a flue gas heat exchanger 2;
Step three: the incineration flue gas treated in the second step enters a Venturi mixer 7, activated carbon is introduced into the Venturi mixer 7 through an activated carbon communication pipeline 7.1, the Venturi mixer 7 sprays activated carbon and the incineration flue gas subjected to denitration, and the characteristics of large specific surface area, large adsorption capacity, small resistance, compact equipment, high purification efficiency and the like of the activated carbon are utilized, so that the incineration flue gas subjected to denitration is purified through the action of the attractive force between suspended dioxin particles in the flue gas and the surface molecules of an adsorbent (activated carbon), and finally fly ash in the flue gas and the activated carbon are collected and uniformly treated by a bag-type dust collector;
Step four: the incineration flue gas treated in the third step enters an absorption tower 4.3 of a desulfurization device 4 from a flue gas inlet 4.1 of the desulfurization device, absorption slurry in a slurry pool 4.6 of the absorption tower is introduced into a spray layer 4.4 of the absorption tower through a slurry circulating pump 4.71, the absorption slurry is sprayed out through the spray layer 4.4 of the absorption tower and is closely contacted with the incineration flue gas, and the incineration flue gas is desulfurized;
Step five: and discharging the purified flue gas treated in the step four from a flue gas outlet 4.2 of the desulfurization device, and discharging the purified flue gas after the temperature of the purified flue gas is raised by a flue gas heat exchanger 2.
Other parts not described belong to the prior art.
Claims (5)
1. the utility model provides an urban sludge incineration flue gas clean system which characterized in that: comprises a denitration device (1), a flue gas heat exchanger (2), a bag-type dust remover (3), a desulphurization device (4) and a flue gas communicating pipeline (5) which are arranged in sequence; the flue gas heat exchanger (2) is communicated with the bag-type dust collector (3) through the flue gas communicating pipeline (5); the bag-type dust collector (3) is communicated with the desulfurization device (4) through the flue gas communication pipeline (5);
The denitration device (1) comprises a urea solution storage tank (1.1) and a urea solution communicating pipeline (1.2) going to the flue gas communicating pipeline (5), a double-fluid nozzle module (5.1) is arranged in the flue gas communicating pipeline (5) and between an urban sludge burning end and the flue gas heat exchanger (2), one end of the urea solution communicating pipeline (1.2) is communicated with the lower part of the urea solution storage tank (1.1), and the other end of the urea solution communicating pipeline is communicated with the double-fluid nozzle module (5.1); a urea solution pump (1.21) and a urea flow regulating valve (1.22) are sequentially arranged on an outlet pipeline of the urea solution storage tank (1.1);
A Venturi mixer (7) is arranged on the flue gas communicating pipeline (5) and between the flue gas heat exchanger (2) and the bag-type dust remover (3), and an active carbon communicating pipeline (7.1) is introduced into the Venturi mixer (7);
the desulfurization device (4) comprises a desulfurization device flue gas inlet (4.1) arranged in the middle and a desulfurization device flue gas outlet (4.2) arranged at the upper end; and the flue gas outlet (4.2) of the desulfurization device is communicated into the flue gas heat exchanger (2) through the flue gas communicating pipeline (5).
2. the municipal sludge incineration flue gas purification system according to claim 1, wherein: a compressed air communication pipeline (6) is led into the double-fluid nozzle module (5.1), and a compressed air flow regulating valve (6.1) is arranged on the compressed air communication pipeline (6).
3. the municipal sludge incineration flue gas purification system according to claim 1 or 2, wherein: the bag-type dust collector (3) is provided with a bag-type dust collector flue gas inlet (3.1) positioned at the lower part of the side wall, a bag-type dust collector flue gas outlet (3.2) positioned at the upper part of the side wall and an activated carbon outlet (3.3) arranged at the lower end; the flue gas outlet (3.2) of the bag-type dust collector is communicated with the flue gas inlet (4.1) of the desulfurization device through the flue gas communicating pipeline (5).
4. The municipal sludge incineration flue gas purification system according to claim 3, wherein: the desulfurization device (4) further comprises an absorption tower (4.3), an absorption tower spray layer (4.4), an absorption tower demister (4.5) and an absorption tower slurry pool (4.6), wherein a desulfurization device flue gas inlet (4.1) is formed in the side wall of the absorption tower (4.3), a desulfurization device flue gas outlet (4.2) is formed in the top end of the absorption tower (4.3), the absorption tower spray layer (4.4), the absorption tower demister (4.5) and the absorption tower slurry pool (4.6) are formed in the absorption tower (4.3), the absorption tower spray layer (4.4) is formed above the desulfurization device flue gas inlet (4.1), and the absorption tower demister (4.5) is formed above the absorption tower spray layer (4.4); a slurry circulation branch (4.7) is arranged on the side wall of the absorption tower (4.3), one end of the slurry circulation branch (4.7) is communicated with the slurry pool (4.6) of the absorption tower, the other end of the slurry circulation branch is communicated with the spray layer (4.4) of the absorption tower, and a slurry circulation pump (4.71) is arranged on the slurry circulation branch (4.7).
5. The municipal sludge incineration flue gas purification system according to claim 4, wherein: the absorption tower spraying layer (4.4) is provided with a plurality of layers, and each layer of the absorption tower spraying layer (4.4) is provided with the slurry circulation branch (4.7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920121925.XU CN209771798U (en) | 2019-01-24 | 2019-01-24 | Urban sludge incineration flue gas purification system |
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| CN201920121925.XU CN209771798U (en) | 2019-01-24 | 2019-01-24 | Urban sludge incineration flue gas purification system |
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| CN209771798U true CN209771798U (en) | 2019-12-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111659241A (en) * | 2020-06-02 | 2020-09-15 | 原金良 | Desulfurization, denitrification and dust removal device and process by adsorption filtration washing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111659241A (en) * | 2020-06-02 | 2020-09-15 | 原金良 | Desulfurization, denitrification and dust removal device and process by adsorption filtration washing method |
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