CN113842761A - A system and method for waste gas treatment - Google Patents
A system and method for waste gas treatment Download PDFInfo
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- CN113842761A CN113842761A CN202111285771.6A CN202111285771A CN113842761A CN 113842761 A CN113842761 A CN 113842761A CN 202111285771 A CN202111285771 A CN 202111285771A CN 113842761 A CN113842761 A CN 113842761A
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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
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
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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
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
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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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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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
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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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
- B01D2258/0291—Flue gases from waste incineration plants
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Abstract
本发明公开了一种垃圾尾气处理系统及处理方法，垃圾尾气处理系统包括：半干法脱酸塔，用于对从所述脱酸塔烟气进口的尾气进行一次脱酸处理并由所述脱酸塔烟气出口排出；尘硝一体化除尘器，包括虑室、净气室、除尘器烟气入口和除尘器烟气出口，在虑室内设置有浸渍了二氧化钛颗粒的陶瓷纤维滤管；湿法脱酸吸收塔，连接在所述除尘器烟气出口，用于对从除尘器烟气出口排出的烟气进行二次脱酸。与现有技术相比，本发明在尘硝一体化设备内安装附着低温催化剂的陶瓷纤维滤管，同时实现脱硝和除尘功能，降低了能耗，简化了工艺，同时提高了粉尘过滤效率和氮氧化物脱除效率，性能上粉尘过滤效率可以达到99.99%以上，氮氧化物脱除效率可以达到95%以上。
The invention discloses a waste tail gas treatment system and a treatment method. The waste tail gas treatment system comprises: a semi-dry deacidification tower, which is used to perform primary deacidification treatment on the tail gas from the flue gas inlet of the deacidification tower, The flue gas outlet of the deacidification tower is discharged; the dust and nitrate integrated dust collector includes a filter chamber, a clean gas chamber, a dust collector flue gas inlet and a dust collector flue gas outlet, and a ceramic fiber filter tube impregnated with titanium dioxide particles is arranged in the filter chamber; The wet deacidification absorption tower is connected to the flue gas outlet of the dust collector, and is used for secondary deacidification of the flue gas discharged from the flue gas outlet of the dust collector. Compared with the prior art, the present invention installs a ceramic fiber filter tube attached with a low-temperature catalyst in the dust-nitrification integrated equipment, realizes the functions of denitration and dust removal at the same time, reduces energy consumption, simplifies the process, and simultaneously improves dust filtration efficiency and nitrogen. The removal efficiency of oxides, the dust filtration efficiency can reach more than 99.99%, and the removal efficiency of nitrogen oxides can reach more than 95%.
Description
Technical Field
The invention relates to the technical field of garbage tail gas treatment, in particular to a garbage tail gas treatment system and method.
Background
The existing waste incineration tail gas contains chemical components such as nitrogen oxides, sulfur, nitrate and the like and particulate matters such as dust and the like, so a tail gas treatment device comprises equipment for desulfurization, denitration, dust removal and the like.
The existing bag-type dust remover has the disadvantages that the dust filtering efficiency is low and the nitrogen oxide removal efficiency is not high due to the material of a filter bag, and the tail gas treatment effect needs to be further improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a garbage tail gas treatment system and method which can reduce energy consumption, simplify the process and synchronously improve the dust filtration efficiency and the nitrogen oxide removal efficiency aiming at the defects of the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that:
a waste tail gas treatment system comprises:
the semi-dry deacidification tower comprises a deacidification tower flue gas inlet, a deacidification tower flue gas outlet and a solid discharge port, and is used for performing primary deacidification treatment on tail gas from the deacidification tower flue gas inlet and discharging the tail gas from the deacidification tower flue gas outlet;
the dust and nitrate integrated dust remover comprises a filter chamber, an air purifying chamber, a dust remover smoke inlet and a dust remover smoke outlet, wherein the air purifying chamber is positioned above the filter chamber, and a ceramic fiber filter tube impregnated with titanium dioxide particles is arranged in the filter chamber; the deduster flue gas inlet is communicated with the filter chamber and is used for introducing flue gas discharged from the flue gas outlet of the deacidification tower; the flue gas outlet of the dust remover is positioned at the upper end of the air purifying chamber;
and the wet deacidification absorption tower is connected to the flue gas outlet of the dust remover and is used for performing secondary deacidification on the flue gas discharged from the flue gas outlet of the dust remover.
The semi-dry deacidification tower also comprises an atomizer, and the atomizer is arranged at the upper end of the semi-dry deacidification tower and is used for atomizing tail gas from a flue gas inlet of the deacidification tower; wherein the atomizer has a process water inlet and a limestone slurry inlet.
And a crusher is also arranged at the solid discharge port of the semi-dry deacidification tower.
And a conveying pipe is arranged between the flue gas outlet of the deacidification tower and the flue gas inlet of the dust remover, and the conveying pipe is connected with a slaked lime conveying branch pipe, an activated carbon conveying branch pipe and a nitrogen conveying branch pipe.
A heat exchanger is arranged between the flue gas outlet of the dust remover and the wet acid-removing absorption tower, and is provided with a first channel and a second channel, wherein the first channel is communicated with the flue gas outlet of the dust remover and the flue gas inlet of the wet acid-removing absorption tower; the second channel is connected with a flue gas outlet of the wet deacidification absorption tower.
The invention also provides a garbage tail gas treatment method, which comprises the following steps:
adopting a semidry deacidification tower to perform primary deacidification treatment on tail gas from a flue gas inlet of the deacidification tower and discharging the tail gas from a flue gas outlet of the deacidification tower;
dedusting and denitration treatment are carried out on tail gas discharged from a flue gas outlet of the deacidification tower by adopting a dust and nitrate integrated deduster;
and (3) performing secondary deacidification treatment on the flue gas discharged from the flue gas outlet of the dust remover by adopting a wet deacidification absorption tower.
Ceramic fiber filter tube adopts high temperature resistant (be less than or equal to 900 ℃) ceramic fiber to make, compare traditional PPS, PTFE filter bag, ceramic fiber is superfine and the irregular characteristic of interweaving for the filter tube filters dust effect excellent, and the filter tube material is inorganic fiber, has high temperature resistant, antidetonation, be difficult for having characteristics such as chemical reaction (nature stability) with chemical, can soak the titanium dioxide granule that includes catalytic component on ceramic fiber filter tube in addition, but nitrogen oxide in the catalytic reduction flue gas when removing dust to the flue gas. The ceramic fiber filter bag obtains good effect in practical application, the filter tube has good rigidity, the filter tube cannot be damaged by high reverse blowing pressure, the filter effect cannot decrease progressively along with the increase of the blowing times, the dust filter effect can be effectively maintained, adhesion of adhesion compounds is not easy to occur, even the hardening condition is caused, the dust filter efficiency in performance can reach more than 99.99%, and the nitrogen oxide removal efficiency can reach more than 95%.
Compared with the prior art, the invention combines the SCR denitration reactor and the bag-type dust remover into dust and nitrate integrated equipment, installs the ceramic fiber filter tube attached with the low-temperature catalyst, and simultaneously realizes the functions of denitration and dust removal, so that the flue gas is directly discharged into a chimney after wet desulphurization, the energy consumption is reduced, the process is simplified, the dust filtration efficiency and the nitrogen oxide removal efficiency are improved, the dust filtration efficiency can reach more than 99.99% in performance, and the nitrogen oxide removal efficiency can reach more than 95%.
Drawings
FIG. 1 is a schematic view of a waste tail gas treatment system according to the present invention;
FIG. 2 is a schematic structural diagram of the integrated dust collector for dust and niter of the present invention;
FIG. 3 is a schematic structural diagram of a plurality of dust and niter integrated dust collectors used in parallel.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
as shown in fig. 1, the present invention provides a waste tail gas treatment system, comprising:
the semi-dry deacidification tower 1 comprises a deacidification tower flue gas inlet 11, a deacidification tower flue gas outlet 12 and a solid discharge port 13. The semidry deacidification tower 1 is used for performing primary deacidification treatment on tail gas from a flue gas inlet 11 of the deacidification tower and discharging the tail gas from a flue gas outlet 12 of the deacidification tower.
The dust and nitrate integrated dust remover 2 is shown in figure 2. Comprises a filter chamber 21, a gas cleaning chamber 22, a dust remover smoke inlet 23 and a dust remover smoke outlet 24. The air purifying chamber 22 is positioned above the filter chamber 21, and a ceramic fiber filter tube 25 impregnated with titanium dioxide particles is arranged in the filter chamber 21; the deduster flue gas inlet 23 is communicated with the filter chamber 21 and is used for introducing flue gas discharged from the flue gas outlet 12 of the deacidification tower; the precipitator flue gas outlet 24 is located at the upper end of the gas cleaning chamber 22. An ash hopper 27 is provided below the chamber 21. The whole dust and nitrate integrated dust remover 2 is supported by a bracket 28.
The dust-containing flue gas enters the dust and nitrate integrated dust remover 2 from the side surface of the filter chamber 21, the dust-containing flue gas flows through gaps among fibers from the outer surface of the ceramic fiber filter tube 25 for purification, then enters the gas purifying chamber 22, and the purified flue gas enters the next-stage flue gas desulfurization device. The ceramic fiber of the ceramic fiber filter tube 25 is extremely fine, the diameter is only 2-3 micrometers, and the filter tube has the irregular interweaving characteristic, so that the dust filtering effect of the filter tube is excellent, the porosity can reach 65-80%, dust is blocked on the outer surface of the filter tube when dust-containing smoke flows out, the dust removing effect is achieved, and simultaneously, NOx in the smoke is reduced into nitrogen and water under the action of a titanium-based catalyst on the surface of the fiber.
And the wet deacidification absorption tower 3 is connected to the deduster flue gas outlet 24 and is used for performing secondary deacidification on the flue gas discharged from the deduster flue gas outlet 24.
In one embodiment, a ceramic fiber filter tube 25 of titanium dioxide particles is secured to a faceplate 26.
In one embodiment, the semi-dry deacidification tower further comprises an atomizer 4, and the atomizer 4 is arranged at the upper end of the semi-dry deacidification tower 1 and is used for atomizing tail gas from a flue gas inlet of the deacidification tower; wherein the atomizer has a process water inlet and a limestone slurry inlet.
In one embodiment, a crusher 5 is further provided at the discharge port 13 of the semi-dry deacidification tower.
In one embodiment, a conveying pipe 6 is arranged between the flue gas outlet 12 of the deacidification tower and the flue gas inlet 23 of the deduster, and a slaked lime conveying branch pipe, an activated carbon conveying branch pipe and a nitrogen conveying branch pipe are connected to the conveying pipe 6.
In one embodiment, a heat exchanger 7 is arranged between the deduster flue gas outlet 24 and the wet deacidification absorption tower 3, and the heat exchanger 7 is provided with a first channel and a second channel, wherein the first channel is communicated with the deduster flue gas outlet and the wet deacidification absorption tower flue gas inlet; the second channel is connected with a flue gas outlet of the wet deacidification absorption tower.
In one embodiment, the dust and nitrate integrated dust remover 2 can also be used in combination of a plurality of dust and nitrate integrated dust removers 2, when a plurality of dust and nitrate integrated dust removers 2 are adopted, the dust remover flue gas inlet 23 of each dust and nitrate integrated dust remover 2 is connected with the dust inlet main pipe, and the dust remover flue gas outlet 24 of each dust and nitrate integrated dust remover 2 is connected with the smoke exhaust main pipe, as shown in fig. 3.
The invention also provides a garbage tail gas treatment method, which comprises the following steps:
adopting a semidry method deacidification tower 1 to perform primary deacidification treatment on tail gas from a flue gas inlet of the deacidification tower and discharging the tail gas from a flue gas outlet of the deacidification tower;
a dust and nitrate integrated dust remover 2 is adopted to remove dust and denitrate the tail gas discharged from the flue gas outlet of the deacidification tower;
and a wet deacidification absorption tower 3 is adopted to carry out secondary deacidification treatment on the flue gas discharged from the flue gas outlet of the dust remover.
The flue gas after the secondary desulfurization treatment is conveyed to a chimney 9 by an induced draft fan 8 and finally discharged.
Claims (6)
1. A garbage tail gas treatment system is characterized by comprising:
the semi-dry deacidification tower comprises a deacidification tower flue gas inlet, a deacidification tower flue gas outlet and a solid discharge port, and is used for performing primary deacidification treatment on tail gas from the deacidification tower flue gas inlet and discharging the tail gas from the deacidification tower flue gas outlet;
the dust and nitrate integrated dust remover comprises a filter chamber, an air purifying chamber, a dust remover smoke inlet and a dust remover smoke outlet, wherein the air purifying chamber is positioned above the filter chamber, and a ceramic fiber filter tube impregnated with titanium dioxide particles is arranged in the filter chamber; the deduster flue gas inlet is communicated with the filter chamber and is used for introducing flue gas discharged from the flue gas outlet of the deacidification tower; the flue gas outlet of the dust remover is positioned at the upper end of the air purifying chamber;
and the wet deacidification absorption tower is connected to the flue gas outlet of the dust remover and is used for performing secondary deacidification on the flue gas discharged from the flue gas outlet of the dust remover.
2. The waste tail gas treatment system of claim 1, wherein the semi-dry deacidification tower further comprises an atomizer, the atomizer is arranged at the upper end of the semi-dry deacidification tower and is used for atomizing tail gas from a flue gas inlet of the deacidification tower; wherein the atomizer has a process water inlet and a limestone slurry inlet.
3. The waste tail gas treatment system of claim 2, wherein a crusher is further arranged at the solid discharge port of the semi-dry deacidification tower.
4. The waste tail gas treatment system according to claim 1, wherein a conveying pipe is arranged between the flue gas outlet of the deacidification tower and the flue gas inlet of the dust remover, and a slaked lime conveying branch pipe, an activated carbon conveying branch pipe and a nitrogen conveying branch pipe are connected to the conveying pipe.
5. The waste tail gas treatment system of claim 1, wherein a heat exchanger is arranged between the flue gas outlet of the dust remover and the wet acid removal absorption tower, and the heat exchanger is provided with a first channel and a second channel, wherein the first channel is communicated with the flue gas outlet of the dust remover and the flue gas inlet of the wet acid removal absorption tower; the second channel is connected with a flue gas outlet of the wet deacidification absorption tower.
6. A waste tail gas treatment method based on the waste tail gas treatment system of any one of claims 1 to 5 is characterized by comprising the following steps:
adopting a semidry deacidification tower to perform primary deacidification treatment on tail gas from a flue gas inlet of the deacidification tower and discharging the tail gas from a flue gas outlet of the deacidification tower;
dedusting and denitration treatment are carried out on tail gas discharged from a flue gas outlet of the deacidification tower by adopting a dust and nitrate integrated deduster;
and (3) performing secondary deacidification treatment on the flue gas discharged from the flue gas outlet of the dust remover by adopting a wet deacidification absorption tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111285771.6A CN113842761A (en) | 2021-11-02 | 2021-11-02 | A system and method for waste gas treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111285771.6A CN113842761A (en) | 2021-11-02 | 2021-11-02 | A system and method for waste gas treatment |
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| CN113842761A true CN113842761A (en) | 2021-12-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377531A (en) * | 2022-01-19 | 2022-04-22 | 中建中环工程有限公司 | Coal-fired boiler flue gas desulfurization and denitrification synergistic treatment system and treatment method |
| CN116272357A (en) * | 2023-05-06 | 2023-06-23 | 凤阳凯盛硅材料有限公司 | A low-temperature treatment method for flue gas denitrification |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN211502852U (en) * | 2019-06-21 | 2020-09-15 | 光大环保技术研究院（南京）有限公司 | Smoke tower integrated waste incineration smoke purification treatment device |
| CN213761219U (en) * | 2020-09-18 | 2021-07-23 | 上海市机电设计研究院有限公司 | Hazardous waste burns flue gas clean system based on catalyst ceramic fiber filter tube |
| CN216062684U (en) * | 2021-11-02 | 2022-03-18 | 中建中环工程有限公司 | Garbage tail gas treatment system |
| CN115253633A (en) * | 2022-07-21 | 2022-11-01 | 上海市机电设计研究院有限公司 | Waste incineration flue gas purification method and system |
-
2021
- 2021-11-02 CN CN202111285771.6A patent/CN113842761A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211502852U (en) * | 2019-06-21 | 2020-09-15 | 光大环保技术研究院（南京）有限公司 | Smoke tower integrated waste incineration smoke purification treatment device |
| CN213761219U (en) * | 2020-09-18 | 2021-07-23 | 上海市机电设计研究院有限公司 | Hazardous waste burns flue gas clean system based on catalyst ceramic fiber filter tube |
| CN216062684U (en) * | 2021-11-02 | 2022-03-18 | 中建中环工程有限公司 | Garbage tail gas treatment system |
| CN115253633A (en) * | 2022-07-21 | 2022-11-01 | 上海市机电设计研究院有限公司 | Waste incineration flue gas purification method and system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377531A (en) * | 2022-01-19 | 2022-04-22 | 中建中环工程有限公司 | Coal-fired boiler flue gas desulfurization and denitrification synergistic treatment system and treatment method |
| CN116272357A (en) * | 2023-05-06 | 2023-06-23 | 凤阳凯盛硅材料有限公司 | A low-temperature treatment method for flue gas denitrification |
| CN116272357B (en) * | 2023-05-06 | 2024-01-09 | 凤阳凯盛硅材料有限公司 | A low-temperature treatment method for flue gas denitration |
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