CN211987939U - Incineration flue gas treatment system - Google Patents
Incineration flue gas treatment system Download PDFInfo
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- CN211987939U CN211987939U CN201922483613.6U CN201922483613U CN211987939U CN 211987939 U CN211987939 U CN 211987939U CN 201922483613 U CN201922483613 U CN 201922483613U CN 211987939 U CN211987939 U CN 211987939U
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model relates to an incineration flue gas processing system, include: the selective non-catalytic reduction SCR denitration system comprises a selective non-catalytic reduction SNCR device, a waste heat furnace, a semi-dry reaction tower, a bag-type dust remover, a selective catalytic reduction SCR denitration device and a chimney; the outlet of the incinerator is connected with the first inlet of the waste heat furnace; an outlet of the SNCR device is connected with a second inlet of the waste heat furnace; the outlet of the waste heat furnace is connected with the first inlet of the semi-dry reaction tower; an outlet of the lime slurry preparation device is connected with a second inlet of the semi-dry reaction tower; the first outlet of the water supply device is connected with the third inlet of the semi-dry reaction tower; the outlet of the semi-dry reaction tower is connected with the inlet of a bag-type dust collector; the outlet of the bag-type dust collector is connected with the inlet of the SCR denitration device, and the outlet of the bag-type dust collector is provided with a booster fan; the outlet of the SCR denitration device is connected with the chimney, and the outlet of the SCR denitration device is provided with the induced draft fan.
Description
Technical Field
The utility model relates to an environmental protection technology field especially relates to an incineration flue gas processing system.
Background
The problem of household garbage becomes the most urgent problem to be solved at present, most of the household garbage is burnt on site particularly in remote areas, and a large amount of harmful gas and smoke dust are generated in the garbage burning process to cause serious air pollution.
With the continuous maturity of the garbage disposal technology, a disposal system for the waste incineration flue gas appears, but the cost of the flue gas disposal system is very high, redundant heat in the incineration flue gas disposal process is not recycled, particularly the process of heating or cooling the flue gas is realized through newly generated heat, and a large amount of resources are wasted. Therefore, there is a need to provide a waste incineration flue gas treatment system capable of recycling excess heat and saving cost, so as to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the defect of prior art, provide and burn flue gas processing system, get rid of the harmful substance who burns in the flue gas, to burning unnecessary heat reuse in the flue gas process to reduce the flue gas treatment cost.
In order to achieve the above object, the embodiment of the utility model provides an incineration flue gas treatment system, incineration flue gas treatment system includes: the selective non-catalytic reduction SCR denitration system comprises a selective non-catalytic reduction SNCR device, a waste heat furnace, a semi-dry reaction tower, a bag-type dust remover, a selective catalytic reduction SCR denitration device and a chimney;
the outlet of the incinerator is connected with the first inlet of the waste heat furnace; an outlet of the SNCR device is connected with a second inlet of the waste heat furnace; the outlet of the waste heat furnace is connected with the first inlet of the semi-dry reaction tower; an outlet of the lime slurry preparation device is connected with a second inlet of the semi-dry reaction tower; the first outlet of the water supply device is connected with the third inlet of the semi-dry reaction tower; the outlet of the semi-dry reaction tower is connected with the inlet of the bag-type dust collector; the outlet of the bag-type dust collector is connected with the inlet of the SCR denitration device, and the outlet of the bag-type dust collector is provided with a booster fan; the outlet of the SCR denitration device is connected with the chimney, and an induced draft fan is arranged at the outlet of the SCR denitration device.
Preferably, the raw flue gas enters the waste heat furnace from the incinerator, the SNCR device sprays urea solution into the waste heat furnace, and the raw flue gas is subjected to primary denitration treatment to obtain denitration flue gas; the denitration flue gas enters the waste heat furnace, is cooled and then is in contact reaction with the atomized lime slurry flowing out of the lime slurry preparation device and the industrial water flowing out of the water supply device in the semi-dry reaction tower to obtain the deacidification flue gas; the deacidified flue gas enters the bag-type dust collector to be filtered to obtain filtered flue gas; and the booster fan sends the filtered flue gas into the SCR denitration device for secondary denitration treatment to obtain secondary denitration flue gas, and the secondary denitration flue gas flows to the chimney under the action of the induced draft fan.
Preferably, the lime slurry preparation apparatus comprises: the system comprises a slaked lime bin, a lime slurry preparation tank, a lime slurry storage tank and an atomizer;
an outlet of the slaked lime bin is connected with a first inlet of the lime preparation tank; a second outlet of the water supply device is connected with a second inlet of the lime slurry preparation tank; the outlet of the lime preparation tank is connected with the third inlet of the lime slurry storage tank; the outlet of the lime slurry storage tank is connected with the inlet of the atomizer;
and the slaked lime in the slaked lime bin and the water of the water supply device enter the lime slurry preparation tank to be mixed, flow into the lime slurry storage tank after being mixed, and then enter the atomizer to be atomized.
Preferably, the semi-dry reaction tower is internally provided with a crusher.
Preferably, a heater is disposed at the bottom of the semi-dry reaction tower.
Preferably, the incineration flue gas treatment system further comprises a white smoke prevention device.
The embodiment of the utility model provides a burn flue gas processing system gets rid of the harmful substance in burning the flue gas, to burning the unnecessary heat reuse of flue gas in-process to reduce the flue gas treatment cost.
Drawings
Fig. 1 is a schematic view of an incineration flue gas treatment system provided by the embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
The embodiment of the utility model provides a burn flue gas processing system gets rid of the harmful substance in burning the flue gas, to burning the unnecessary heat reuse of flue gas in-process to reduce the flue gas treatment cost. Fig. 1 is the schematic view of the incineration flue gas treatment system provided by the embodiment of the present invention, as shown in fig. 1, the incineration flue gas treatment system includes: a Selective non-Catalytic Reduction (SNCR) device 2, a waste heat furnace 3, a semi-dry reaction tower 11, a bag-type dust collector 13, a Selective Catalytic Reduction (SCR) denitration device 15, and a chimney 17.
The outlet of the incinerator 1 is connected to the first inlet of the waste heat furnace 3. The outlet of the SNCR device 2 is connected to a second inlet of the waste heat furnace 3. The SNCR device 2 injects a urea solution into the waste heat furnace 3 to perform the first denitration treatment on the raw flue gas. The waste heat furnace 3 is used for carrying out heat exchange on the incineration flue gas subjected to the primary denitration and the flue gas subjected to dust removal by the bag-type dust remover 13, and the temperature of the flue gas subjected to dust removal is increased.
An outlet of the waste heat furnace 3 is connected to a first inlet of the semi-dry reaction tower 11.
The outlet of the lime slurry preparation device is connected with the second inlet of the semi-dry reaction tower 11.
Specifically, the lime slurry preparation device includes: a slaked lime bin 7, a lime slurry preparation tank 8, a lime slurry storage tank and an atomizer 10. The atomizer 10 is used for atomizing lime slurry, so that the atomized lime slurry enters the semi-dry reaction tower 11 and then fully reacts with flue gas. The outlet of the slaked lime bin 7 is connected with the first inlet of the lime preparation tank, the second outlet of the water supply device 6 is connected with the second inlet of the lime slurry preparation tank 8, the outlet of the lime preparation tank is connected with the third inlet of the lime slurry storage tank 9, and the outlet of the lime slurry storage tank 9 is connected with the inlet of the atomizer 10.
The first outlet of the water supply means 6 is connected to the third inlet of the semi-dry reaction tower 11.
The semi-dry reaction tower 11 is used for deacidifying the flue gas generated by the garbage incinerator 1, namely, removing acid gases such as hydrogen chloride, sulfur dioxide, sulfur trioxide, hydrogen fluoride and the like in the flue gas.
A crusher and a fly ash outlet are arranged in the semi-dry reaction tower 11. The crusher is used for crushing particulate matters generated by the reaction of the atomized lime slurry and the flue gas. The fly ash port is used for discharging ash, an induced draft fan is arranged at the fly ash port, and the fly ash discharged from the semi-dry reaction tower 11 finally enters an ash bin under the action of the induced draft fan, wherein the ash bin refers to a warehouse for storing the fly ash. The bottom of the semi-dry reaction tower 11 is provided with a heater for preventing caking and corrosion in the semi-dry reaction tower 11. Optionally, injection devices are arranged at the inlet and the outlet of the semi-dry reaction tower 11, and each injection device comprises an activated carbon injection device 4, a dry deacidification device 5 and a cloth bag pre-spraying device 12.
The activated carbon injection device 4 injects activated carbon into a flue between the waste heat furnace 3 and the semi-dry reaction tower 11, or a flue between the semi-dry reaction tower 11 and the bag-type dust collector 13, so as to absorb heavy metals such as mercury by using the activated carbon.
The dry deacidification device 5, namely a sodium bicarbonate injection device, is arranged in a flue between the waste heat furnace 3 and the semi-dry reaction tower 11 or a flue between the semi-dry reaction tower 11 and the bag-type dust remover 13, and the specific position arranged in the flue can be adjusted according to the temperature and the humidity of the flue gas, so that the dry deacidification device is used as a standby device for deacidification of the flue gas when the atomizer 10 is stopped, namely the semi-dry reaction tower 11 cannot perform deacidification treatment on the flue gas.
The cloth bag pre-spraying device 12 is connected with an outlet of the slaked lime bin 7, slaked lime in the slaked lime bin 7 is sprayed in from an inlet of the cloth bag dust remover 13 through the cloth bag pre-spraying device 12 so as to deal with the working condition of high oil content and protect the structure of the cloth bag dust remover 13.
The outlet of the semi-dry reaction tower 11 is connected with the inlet of a bag-type dust collector 13.
The bag-type dust collector 13 is used for removing particulate matters such as fly ash in the flue gas. The bag-type dust collector 13 collects and removes particles through a filter bag, and mainly comprises an upper box body, a middle box body, an ash bucket, an ash removal system, an ash discharge mechanism and the like, and adopts a structure commonly used in the field, which is not limited herein. In this embodiment, the ash hopper is preferably a large ash hopper structure, i.e. the opening is large, to prevent blockage.
The outlet of the bag-type dust collector 13 is connected with the inlet of the SCR denitration device 15 through the booster fan 14, and the booster fan 14 is arranged at the outlet of the bag-type dust collector 13 and used for overcoming the resistance of the smoke flowing out of the bag-type dust collector 13 and introducing the smoke into the SCR denitration device 15.
And carrying out secondary denitration treatment on the flue gas in the SCR denitration device 15 to obtain secondary denitration flue gas.
The outlet of the SCR denitration device 15 is connected with a chimney 17 through an induced draft fan 16, and the induced draft fan 16 is used for accelerating the outflow of the flue gas from the chimney 17.
The working process of the incineration flue gas treatment system is as follows:
the raw flue gas flows out of the incinerator 1 and enters the waste heat furnace 3, the SNCR device sprays urea solution into the waste heat furnace, and the raw flue gas is subjected to primary denitration treatment to obtain denitration flue gas; and (4) enabling the denitration flue gas to enter a waste heat furnace 3 for cooling treatment to obtain cooling flue gas. The slaked lime in the slaked lime bin 7 and the water supplied to the water device 6 enter a lime slurry preparation tank 8 to be mixed, and after being mixed, the mixture flows into a lime slurry storage tank 9 and then enters an atomizer 10 to be atomized. The temperature-reduced flue gas, the atomized lime slurry flowing out of the lime slurry preparation device and the industrial water flowing out of the water supply device 6 are in contact reaction in the semi-dry reaction tower 11 to obtain deacidified flue gas. The deacidified flue gas flows out of the semi-dry reaction tower 11 and enters a bag-type dust collector 13 to be filtered, and filtered flue gas is obtained. The filtered flue gas enters the waste heat furnace firstly, exchanges heat with the first denitration flue gas, and is heated after the heat exchange. The booster fan 14 sends the filtered flue gas after the temperature rise to the SCR denitration device 15, and performs secondary denitration treatment to obtain secondary denitration flue gas. The secondary denitration flue gas flows to a chimney 17 under the action of a draught fan 16.
In a preferred embodiment, the incineration flue gas treatment system further comprises a white smoke prevention device for performing a whitening treatment on the flue gas, i.e. further removing acid gases in the flue gas and moisture in the flue gas so as to convert the flue gas into the whitened flue gas.
Specifically, the white smoke prevention device can be a wet deacidification tower, and water and acid gas in the smoke are removed by using a deacidification agent in a wet deacidification mode. After the white smoke is removed by the white smoke preventing device, the temperature of the smoke is reduced from about 100 ℃ to about 65 ℃, which is not beneficial to being discharged from the chimney 17 to the atmosphere, so the white smoke needs to be heated to raise the temperature. In order to fully utilize the heat of the flue gas discharged from the white smoke preventing device, a heat exchanger is arranged between the SCR denitration device 15 and the white smoke preventing device, the unbleached flue gas from the SCR denitration device 15 and the unbleached flue gas from the white smoke preventing device exchange heat in the heat exchanger, after the heat exchange, the temperature of the unbleached flue gas from the denitration device is reduced to about 100 ℃ from about 170 ℃, and the temperature of the unbleached flue gas is increased to about 110 ℃.
The embodiment of the utility model provides a burn flue gas processing system gets rid of the harmful substance in burning the flue gas, to burning the unnecessary heat reuse of flue gas in-process to reduce the flue gas treatment cost.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The term "connected" is used in a broad sense, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. An incineration flue gas treatment system, characterized in that the incineration flue gas treatment system includes: the selective non-catalytic reduction SCR denitration system comprises a selective non-catalytic reduction SNCR device, a waste heat furnace, a semi-dry reaction tower, a bag-type dust remover, a selective catalytic reduction SCR denitration device and a chimney;
the outlet of the incinerator is connected with the first inlet of the waste heat furnace; an outlet of the SNCR device is connected with a second inlet of the waste heat furnace; the outlet of the waste heat furnace is connected with the first inlet of the semi-dry reaction tower; an outlet of the lime slurry preparation device is connected with a second inlet of the semi-dry reaction tower; the first outlet of the water supply device is connected with the third inlet of the semi-dry reaction tower; the outlet of the semi-dry reaction tower is connected with the inlet of the bag-type dust collector; the outlet of the bag-type dust collector is connected with the inlet of the SCR denitration device, and the outlet of the bag-type dust collector is provided with a booster fan; the outlet of the SCR denitration device is connected with the chimney, and an induced draft fan is arranged at the outlet of the SCR denitration device.
2. The incineration flue gas treatment system according to claim 1, wherein raw flue gas enters the waste heat furnace from the incinerator, the SNCR device sprays a urea solution into the waste heat furnace, and the raw flue gas is subjected to a first denitration treatment to obtain denitration flue gas; the denitration flue gas enters the waste heat furnace, is cooled and then is in contact reaction with the atomized lime slurry flowing out of the lime slurry preparation device and the industrial water flowing out of the water supply device in the semi-dry reaction tower to obtain the deacidification flue gas; the deacidified flue gas enters the bag-type dust collector to be filtered to obtain filtered flue gas; and the booster fan sends the filtered flue gas into the SCR denitration device for secondary denitration treatment to obtain secondary denitration flue gas, and the secondary denitration flue gas flows to the chimney under the action of the induced draft fan.
3. The incineration flue gas treatment system of claim 1, wherein the lime slurry preparation device comprises: the system comprises a slaked lime bin, a lime slurry preparation tank, a lime slurry storage tank and an atomizer;
the outlet of the slaked lime bin is connected with the first inlet of the lime slurry preparation tank; a second outlet of the water supply device is connected with a second inlet of the lime slurry preparation tank; the outlet of the lime slurry preparation tank is connected with the third inlet of the lime slurry storage tank; the outlet of the lime slurry storage tank is connected with the inlet of the atomizer;
and the slaked lime in the slaked lime bin and the water of the water supply device enter the lime slurry preparation tank to be mixed, flow into the lime slurry storage tank after being mixed, and then enter the atomizer to be atomized.
4. The incineration flue gas treatment system according to claim 1, wherein a crusher is built in the semi-dry reaction tower.
5. The incineration flue gas treatment system according to claim 1, wherein a heater is provided at a bottom of the semi-dry reaction tower.
6. The incineration flue gas treatment system according to claim 1, further comprising a white smoke prevention device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922483613.6U CN211987939U (en) | 2019-12-31 | 2019-12-31 | Incineration flue gas treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922483613.6U CN211987939U (en) | 2019-12-31 | 2019-12-31 | Incineration flue gas treatment system |
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| CN211987939U true CN211987939U (en) | 2020-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115382391A (en) * | 2022-08-29 | 2022-11-25 | 中节能(象山)环保能源有限公司 | Domestic waste burns flue gas processing system |
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2019
- 2019-12-31 CN CN201922483613.6U patent/CN211987939U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115382391A (en) * | 2022-08-29 | 2022-11-25 | 中节能(象山)环保能源有限公司 | Domestic waste burns flue gas processing system |
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Address after: 100024 Gao Antun, Jinzhan Township, Chaoyang District, Beijing Patentee after: Beijing Chaoqing Environmental Protection Energy Technology Co.,Ltd. Address before: 100024 Gao Antun, Jinzhan Township, Chaoyang District, Beijing Patentee before: Beijing Chaoqing Environmental Energy Technology Co.,Ltd. Address after: 100024 Gao Antun, Jinzhan Township, Chaoyang District, Beijing Patentee after: Beijing Chaoqing Environmental Energy Technology Co.,Ltd. Address before: 100024 Gao Antun, Jinzhan Township, Chaoyang District, Beijing Patentee before: Beijing Chaojing environmental protection energy technology Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230106 Address after: No. 28, Room 201, Floor 3, Building 3, Yard 2, Louzizhuang, Chaoyang District, Beijing 100018 (Chaoyang Cluster, International Business Service Area, Beijing Pilot Free Trade Zone) Patentee after: Beijing Chaoyang Environment Group Co.,Ltd. Address before: 100024 Gao Antun, Jinzhan Township, Chaoyang District, Beijing Patentee before: Beijing Chaoqing Environmental Protection Energy Technology Co.,Ltd. |