CN210035516U - Hazardous waste incineration flue gas treatment device - Google Patents
Hazardous waste incineration flue gas treatment device Download PDFInfo
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- CN210035516U CN210035516U CN201920286309.XU CN201920286309U CN210035516U CN 210035516 U CN210035516 U CN 210035516U CN 201920286309 U CN201920286309 U CN 201920286309U CN 210035516 U CN210035516 U CN 210035516U
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- flue gas
- heat exchanger
- dust removal
- wet
- treatment
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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
Abstract
The utility model provides a useless flue gas processing apparatus that burns of danger, it includes: the dust removal device is configured to perform dust removal treatment on the flue gas; the wet deacidification device is used for removing acid gas in the flue gas through two-stage wet deacidification treatment; the flue gas-flue gas heat exchanger is arranged between the wet deacidification device and the dust removal device, is communicated with the wet deacidification device and the dust removal device through pipelines, and is used for exchanging heat between the flue gas discharged by the dust removal device and the flue gas subjected to deacidification treatment by the wet deacidification device; the steam-flue gas heat exchanger is communicated with the flue gas-flue gas heat exchanger through a pipeline and is used for exchanging heat between the steam and the flue gas discharged by the flue gas-flue gas heat exchanger so as to increase the temperature of the flue gas; and the SCR denitration device is used for denitration of the flue gas flowing in from the steam-flue gas heat exchanger so as to remove nitrogen oxides in the flue gas. According to the utility model discloses a flue gas of useless incineration flue gas processing apparatus make full use of flue gas of danger has saved the energy to purifying effect is better.
Description
Technical Field
The utility model relates to a useless flue gas processing technology that burns of danger particularly relates to a useless flue gas processing apparatus that burns of danger.
Background
With the rapid development of economy in China, a series of environmental problems, such as various wastes, are brought. At present, waste treatment (including municipal solid waste and hazardous waste) is generally carried out in a mode of incineration power generation for harmless, reduction and resource treatment so as to reduce the pollution problem. The existing hazardous waste incineration flue gas purification system mainly comprises a bag-type dust remover, a dry-method deacidification tower, a wet-method tower, an SCR denitration device and the like.
However, the existing flue gas purification system has the defects of high dust content and high steam consumption, the purification effect is not good enough, and the energy utilization rate is low.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.
In order to solve above-mentioned problem partially at least, the utility model discloses a useless fume treatment device that burns of danger for get rid of the pollutant that contains in the flue gas, it includes: the dust removal device is configured to perform dust removal treatment on the flue gas so as to remove particulate matters in the flue gas;
the wet deacidification device is used for removing acid gas in the flue gas through two-stage wet deacidification treatment;
the flue gas-flue gas heat exchanger is arranged between the wet deacidification device and the dust removal device, is communicated with the wet deacidification device and the dust removal device through pipelines, and is used for exchanging heat between the flue gas discharged by the dust removal device and the flue gas subjected to deacidification treatment by the wet deacidification device;
the steam-flue gas heat exchanger is communicated with the flue gas-flue gas heat exchanger through a pipeline and is used for exchanging heat between steam and flue gas discharged by the flue gas-flue gas heat exchanger so as to raise the temperature of the flue gas;
and the SCR denitration device is used for denitration of the flue gas flowing in from the steam-flue gas heat exchanger so as to remove nitrogen oxides in the flue gas.
In an embodiment of the present invention, the present invention further comprises:
and the cooling device is arranged at the upstream position of the dust removal device and used for cooling the flue gas, and the cooling device is connected with the dust removal device through a pipeline.
In an embodiment of the present invention, the present invention further comprises:
and the activated carbon injection device is arranged on a pipeline between the cooling device and the dust removal device and is used for injecting activated carbon into the pipeline.
In an embodiment of the present invention, the present invention further comprises:
and the waste heat boiler is arranged at the upstream position of the cooling device, is communicated with the cooling device through a pipeline and is used for heating circulating water by using waste heat contained in the flue gas to generate steam.
In an embodiment of the present invention, the present invention further comprises:
and the SNCR injection device is used for injecting an SNCR reactant into the waste heat boiler so as to remove nitrogen oxides in the flue gas.
In an embodiment of the present invention, the wet deacidification apparatus includes:
and the wet tower is communicated with the flue gas-flue gas heat exchanger and is used for performing wet deacidification treatment on the flue gas flowing in from the flue gas-flue gas heat exchanger.
In an embodiment of the present invention, the wet deacidification apparatus includes:
and the wet electric demister is communicated with the wet tower and the flue gas-flue gas heat exchanger and is used for removing aerosol acid mist in the flue gas flowing in from the wet tower and guiding the treated flue gas into the flue gas-flue gas heat exchanger.
In an embodiment of the present invention, the dust removing device is a bag-type dust remover.
In one embodiment of the present invention, the cooling device is a quench tower.
In an embodiment of the present invention, the present invention further comprises: and the chimney is communicated with the SCR denitration device through a pipeline, and the flue gas discharged by the SCR denitration device is discharged to the atmosphere through the chimney.
According to the hazardous waste incineration flue gas treatment device, the dry method is cancelled, the two-stage wet deacidification is adopted, the dust content is reduced, and the materials are saved; meanwhile, the GGH heat exchanger is arranged behind the dust removal device and in front of the wet deacidification device, so that the heat of the flue gas discharged by the dust removal device is fully utilized, the subsequent steam consumption is reduced, and the energy is saved.
Drawings
The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles of the invention.
In the drawings:
fig. 1 shows according to the utility model discloses an embodiment's useless incineration flue gas processing apparatus of danger structural sketch map.
Description of reference numerals:
1 exhaust-heat boiler
2 Cooling device
3 dust removing device
4 GGH heat exchanger
5 Wet tower
6 wet electric defroster
7 SGH heat exchanger
8 SCR denitrification facility
9 chimney
10 SNCR injection device
11 activated carbon injection device
100 dangerous waste incineration flue gas treatment device
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring embodiments of the present invention.
In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the invention are possible in addition to these detailed descriptions.
In order to provide a thorough understanding of the present invention, detailed structures and steps will be provided in the following description so as to explain the technical solution provided by the present invention. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.
Before the introduction, the meaning of the terms in this text is explained.
Hazardous waste: wastes with hazardous characteristics listed in national hazardous waste catalogues or identified according to national regulated hazardous waste identification standards and methods, including but not limited to incineration plant fly ash and ash, herein referred to as hazardous wastes;
SGH: a steam-flue gas heat exchanger, for example, a heat exchanger that heats flue gas entering the SCR to a specific temperature using steam as a heating medium;
GGH: a flue gas-flue gas heat exchanger;
SCR: a selective catalytic reduction denitration technology;
SNCR: a selective non-catalytic reduction denitration technology.
The hazardous waste incineration flue gas treatment device according to an embodiment of the present invention is described in detail with reference to fig. 1.
The hazardous waste incineration flue gas treatment device 100 provided by the embodiment is used for treating flue gas generated by hazardous waste incineration treatment so as to reduce environmental pollution, and the flue gas is discharged into the atmosphere through the chimney 9 after being treated by the flue gas treatment device.
As shown in fig. 1, the hazardous waste incineration flue gas treatment device 100 provided by this embodiment includes a waste heat boiler 1, a cooling device 2, a dust removal device 3, a GGH heat exchanger 4, a wet tower 5, a wet electric demister 6, an SGH heat exchanger 7, an SCR denitration device 8, a chimney 9, an SNCR injection device 10, and an activated carbon injection device 11, which are communicated through a pipeline.
The waste heat boiler 1 is arranged at the upstream position of the cooling device 2 and is communicated with the cooling device 2 through a pipeline. The exhaust-heat boiler 1 is used for heating circulating water by utilizing waste heat contained in smoke generated by dangerous waste incineration to generate steam, so that heat in the smoke is fully utilized, and the smoke flows into the cooling device 2 through the pipeline after passing through the exhaust-heat boiler 1. In some embodiments, the temperature of the flue gas flowing into the heat recovery steam generator 1 is, for example, 520 ℃, and the temperature of the flue gas discharged from the heat recovery steam generator 1 is, for example, 200 ℃.
Further, in the present embodiment, an SNCR reagent, such as ammonia, is also injected into the waste heat boiler 1 through the SNCR injection device 10, and the SNCR reagent reacts with nitrogen oxides (such as nitric oxide NO) in the flue gas through the SNCR reagent to at least partially remove the nitrogen oxides in the flue gas.
The cooling device 2 is arranged between the waste heat boiler 1 and the dust removing device 3 and is communicated with the waste heat boiler 1 and the dust removing device 3 through pipelines. The cooling device 2 is used for cooling the flue gas discharged by the waste heat boiler 1. In some embodiments, the cooling device 2 is a quench tower.
In this embodiment, an activated carbon injection device 11 is further disposed on the pipeline between the cooling device 2 and the dust removal device 3, and is used for injecting activated carbon into the pipeline to remove dioxin and heavy metals in flue gas.
The dust removing device 3 is arranged between the cooling device 2 and the GGH heat exchanger 4 and is communicated with the cooling device 2 and the GGH heat exchanger 4 through pipelines. The dust removal device 3 is used for carrying out dust removal treatment on the flue gas so as to remove particulate matters in the flue gas. In some embodiments, the dust removing device 3 employs a bag-type dust remover. The bag-type dust collector is a bag-type dust collector, collects and removes particles by a filter bag, mainly comprises an upper box body, a middle box body, a lower box body (ash bucket), an ash removal system, an ash discharge mechanism and the like, adopts a structure commonly used in the field, and 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. In some embodiments, the temperature of the flue gas exiting the dust removal device 3 is, for example, 175 ℃.
The GGH heat exchanger 4 (namely a flue gas-flue gas heat exchanger) is arranged between the dust removal device 3 and the wet deacidification device (namely the wet tower 5 and the wet electric demister 6), is communicated with the wet deacidification device and the dust removal device 3 through a pipeline, and is used for exchanging heat between the flue gas discharged by the dust removal device 3 and the flue gas after deacidification treatment by the wet deacidification device so as to reduce the temperature of the flue gas discharged by the dust removal device 3 and increase the temperature of the flue gas after deacidification treatment, namely the temperature of the flue gas after deacidification treatment is increased by using the waste heat of the flue gas discharged by the dust removal device 3. In some embodiments, the temperature of the flue gas exiting the GGH heat exchanger 4 into the wet column 5 is, for example, 100 ℃, the temperature of the flue gas exiting the wet electric mist eliminator 6 is, for example, 65 ℃, and the temperature of the flue gas exiting the GGH heat exchanger 4 into the SGH heat exchanger 7 is 140 ℃.
The wet deacidification apparatus in this embodiment includes a wet tower 5 and a wet electric demister 6, and is used for removing acid gases from flue gas by a two-stage wet deacidification process.
Specifically, the wet tower 5 is communicated with the flue gas-flue gas heat exchanger 4, and is used for performing wet deacidification treatment on the flue gas flowing in from the flue gas-flue gas heat exchanger 4; the wet electric demister 6 is communicated with the wet tower 5 and the flue gas-flue gas heat exchanger 4, and is used for removing aerosol acid mist in flue gas flowing in from the wet tower 5 and guiding the treated flue gas into the flue gas-flue gas heat exchanger 4 for heating.
An SGH heat exchanger (i.e., a steam-flue gas heat exchanger) 7 is communicated with the flue gas-flue gas heat exchanger 4 through a pipeline, and is configured to exchange heat between steam and flue gas discharged from the flue gas-flue gas heat exchanger 4 to raise the temperature of the flue gas. In some embodiments, after passing through the SGH heat exchanger 7, the temperature of the flue gas is increased to 200 ℃ suitable for the SCR reaction.
The SCR denitration device 8 is arranged at the downstream position of the SGH heat exchanger 7 and is communicated with the SGH heat exchanger 7 and a chimney 9 through pipelines. The SCR denitration device 8 is used to denitrate the flue gas flowing in from the SGH heat exchanger 7 by the SCR technology to remove nitrogen oxides in the flue gas. In some embodiments, the temperature of the flue gas exiting the SCR denitration device 8 is 198 ℃, which is then discharged to the atmosphere via the stack 9, and due to the higher temperature, white smoke conditions can be avoided.
The flue gas purification process of the hazardous waste incineration flue gas treatment device of the embodiment is as follows: the flue gas gets into in exhaust-heat boiler 1 from dangerous useless incineration device after coming out, and the waste heat that the flue gas carried is used for heating the circulating water in exhaust-heat boiler 1 and forms the steam that is used for applications such as electricity generation, and the flue gas reacts with the SNCR reactant that SNCR injection apparatus 10 sprayed into simultaneously to get rid of partial nitrogen oxide in the flue gas, and the flue gas gets into cooling device 2 afterwards and cools off, in order to reduce the temperature. The cooled flue gas then enters the dust removal device 3 for dust removal treatment to remove particulate matters in the flue gas, and simultaneously acts with the activated carbon sprayed by the activated carbon spraying device 11 in a pipeline between the cooling device 2 and the dust removal device 3 to remove heavy metals and dioxin substances in the flue gas. And then the flue gas enters the GGH heat exchanger 4 to exchange heat with the flue gas subjected to deacidification treatment so as to increase the temperature of the flue gas subjected to deacidification treatment and reduce the temperature of the flue gas. The flue gas after heat exchange enters a wet tower 5 for deacidification treatment, aerosol acid mist in the flue gas is further removed through a wet electric demister 6, and the flue gas after deacidification enters a GGH heat exchanger 4 for heat exchange to raise the temperature. The flue gas is heated by the GGH heat exchanger 4, enters the SGH heat exchanger 7 for further heating, then enters the SCR reaction device 8 for SCR reaction to further remove nitrogen oxides in the flue gas, and the flue gas after the SCR reaction is discharged to the atmosphere through the chimney 9.
According to the utility model discloses danger is useless burns flue gas processing apparatus has following advantage:
firstly, acid gas is removed through a subsequent wet tower instead of dry deacidification, so that the content of acid gas and dust in flue gas is reduced, the treatment difficulty is reduced, materials are saved, and the system operation cost is reduced.
Secondly, the GGH heat exchanger is arranged behind the dust removal device in front of the wet tower, heat in the flue gas discharged by the dust removal device is fully utilized, the low-temperature flue gas behind the wet electric demister is reheated to 140 ℃, and the SGH heat exchanger only needs to heat the flue gas at 140 ℃ to 200 ℃, so that the steam quantity required by the SGH heat exchanger is reduced, the energy is saved, and the operation cost is reduced.
And thirdly, on the premise of reducing the steam consumption, the temperature of the smoke discharged by reaching the standard is increased to 180 ℃ from the previous 140 ℃, and the requirement of no white smoke all the year round can be met.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a useless incineration flue gas processing apparatus of danger for get rid of the pollutant that contains in the flue gas, its characterized in that includes:
the dust removal device is configured to perform dust removal treatment on the flue gas so as to remove particulate matters in the flue gas;
the wet deacidification device is used for removing acid gas in the flue gas through two-stage wet deacidification treatment;
the flue gas-flue gas heat exchanger is arranged between the wet deacidification device and the dust removal device, is communicated with the wet deacidification device and the dust removal device through pipelines, and is used for exchanging heat between the flue gas discharged by the dust removal device and the flue gas subjected to deacidification treatment by the wet deacidification device;
the steam-flue gas heat exchanger is communicated with the flue gas-flue gas heat exchanger through a pipeline and is used for exchanging heat between steam and flue gas discharged by the flue gas-flue gas heat exchanger so as to raise the temperature of the flue gas;
and the SCR denitration device is used for denitration of the flue gas flowing in from the steam-flue gas heat exchanger so as to remove nitrogen oxides in the flue gas.
2. The hazardous waste incineration flue gas treatment device of claim 1, further comprising:
and the cooling device is arranged at the upstream position of the dust removal device and used for cooling the flue gas, and the cooling device is connected with the dust removal device through a pipeline.
3. The hazardous waste incineration flue gas treatment device of claim 2, further comprising:
and the activated carbon injection device is arranged on a pipeline between the cooling device and the dust removal device and is used for injecting activated carbon into the pipeline.
4. The hazardous waste incineration flue gas treatment device of claim 2, further comprising:
and the waste heat boiler is arranged at the upstream position of the cooling device, is communicated with the cooling device through a pipeline and is used for heating circulating water by using waste heat contained in the flue gas to generate steam.
5. The hazardous waste incineration flue gas treatment device of claim 4, further comprising:
and the SNCR injection device is used for injecting an SNCR reactant into the waste heat boiler so as to remove nitrogen oxides in the flue gas.
6. The hazardous waste incineration flue gas treatment device of claim 1, wherein the wet deacidification device comprises:
and the wet tower is communicated with the flue gas-flue gas heat exchanger and is used for performing wet deacidification treatment on the flue gas flowing in from the flue gas-flue gas heat exchanger.
7. The hazardous waste incineration flue gas treatment device of claim 6, wherein the wet deacidification device comprises:
and the wet electric demister is communicated with the wet tower and the flue gas-flue gas heat exchanger and is used for removing aerosol acid mist in the flue gas flowing in from the wet tower and guiding the treated flue gas into the flue gas-flue gas heat exchanger.
8. The hazardous waste incineration flue gas treatment device of claim 1, wherein the dust removal device is a bag-type dust remover.
9. The hazardous waste incineration flue gas treatment device of claim 2, wherein the cooling device is a quench tower.
10. The hazardous waste incineration flue gas treatment device of claim 1, further comprising:
and the chimney is communicated with the SCR denitration device through a pipeline, and the flue gas discharged by the SCR denitration device is discharged to the atmosphere through the chimney.
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CN201920286309.XU CN210035516U (en) | 2019-03-06 | 2019-03-06 | Hazardous waste incineration flue gas treatment device |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111333290A (en) * | 2020-04-08 | 2020-06-26 | 上海环境工程设计研究院有限公司 | Cu-containing industrial sludge hazardous waste recycling treatment system and treatment method thereof |
CN111589843A (en) * | 2020-05-29 | 2020-08-28 | 浙江华环环境有限公司 | Additive for high-temperature melting gasification of waste incineration fly ash and treatment method |
CN112843977A (en) * | 2020-12-28 | 2021-05-28 | 上海域德环保工程有限公司 | Purification process for ultralow emission flue gas generated by hazardous waste incineration |
CN112845515A (en) * | 2020-12-30 | 2021-05-28 | 中科院过程工程研究所南京绿色制造产业创新研究院 | Method for treating pyrolysis flue gas of solid waste |
CN114225672A (en) * | 2021-11-29 | 2022-03-25 | 北京航化节能环保技术有限公司 | A low temperature denitrification facility for endangering useless incineration flue gas |
-
2019
- 2019-03-06 CN CN201920286309.XU patent/CN210035516U/en active Active
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111333290A (en) * | 2020-04-08 | 2020-06-26 | 上海环境工程设计研究院有限公司 | Cu-containing industrial sludge hazardous waste recycling treatment system and treatment method thereof |
CN111589843A (en) * | 2020-05-29 | 2020-08-28 | 浙江华环环境有限公司 | Additive for high-temperature melting gasification of waste incineration fly ash and treatment method |
CN112843977A (en) * | 2020-12-28 | 2021-05-28 | 上海域德环保工程有限公司 | Purification process for ultralow emission flue gas generated by hazardous waste incineration |
CN112845515A (en) * | 2020-12-30 | 2021-05-28 | 中科院过程工程研究所南京绿色制造产业创新研究院 | Method for treating pyrolysis flue gas of solid waste |
CN114225672A (en) * | 2021-11-29 | 2022-03-25 | 北京航化节能环保技术有限公司 | A low temperature denitrification facility for endangering useless incineration flue gas |
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