CN110404349A - A device for efficiently removing dust and dioxin from waste incineration flue gas - Google Patents

A device for efficiently removing dust and dioxin from waste incineration flue gas Download PDF

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Publication number
CN110404349A
CN110404349A CN201910632285.3A CN201910632285A CN110404349A CN 110404349 A CN110404349 A CN 110404349A CN 201910632285 A CN201910632285 A CN 201910632285A CN 110404349 A CN110404349 A CN 110404349A
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flue gas
bag
dioxin
dust
waste incineration
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CN201910632285.3A
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Chinese (zh)
Inventor
罗翠红
徐爱杰
贺毅
邵伟涛
张金荣
石峰
张斌
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Guangzhou Ring Design And Research Institute Co Ltd
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Guangzhou Ring Design And Research Institute Co Ltd
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Priority to CN201910632285.3A priority Critical patent/CN110404349A/en
Publication of CN110404349A publication Critical patent/CN110404349A/en
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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
    • B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/04—Cleaning filters
    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • B01D53/06—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 by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
    • B01D53/10—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 by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The present invention discloses the device of a kind of efficient removal flue gas of refuse burning dust and dioxin, belong to the dedusting of burning power plant and except dioxin technical field, it, which is disclosed, increases oblique deflector with holes and bluff body to existing bag filter inlet, two bag filters are connected simultaneously, export injection active carbon in level-one bag filter.The present invention improves bag filter interior flow field uniformity and reduces impact of the air-flow to filter bag, extends cloth bag service life；Simultaneously because flying dust and the part dioxin being attached on flying dust are removed by level-one cloth bag, remaining dioxin then passes through level-one cloth bag and mixes with active carbon to be removed by second level cloth bag, what is unloaded when from second level cloth bag deashing is the clean active carbon of comparison, the recycling of active carbon may be implemented, while greatly improving the removal efficiency of dioxin.

Description

一种高效脱除垃圾焚烧烟气粉尘和二噁英的装置A device for efficiently removing dust and dioxin from waste incineration flue gas

技术领域：Technical field:

本发明创造属于垃圾焚烧烟气净化领域，涉及布袋除尘器，具体是一种高效脱除垃圾焚烧烟气粉尘和二噁英的系统。The invention belongs to the field of waste incineration flue gas purification, relates to a bag filter, and in particular is a system for efficiently removing dust and dioxins from waste incineration flue gas.

背景技术：Background technique:

目前，脱除垃圾焚烧电厂烟气中的二噁英采用最广泛的是“活性炭喷射+布袋除尘器”技术，这种方法虽然对二噁英具有较好的脱除效果,但活性炭消耗量较大、运行费用高，而且由于二噁英有一部分是吸附在飞灰颗粒上，另外一部分以气相悬浮的形式存在烟气中，因为烟气中飞灰和重金属等的影响，活性炭对气态悬浮的二噁英吸附效果不是很理想。同时，现有布袋除尘器入口处存在明显的射流现象，这会导致除尘器内气流不均匀，对滤袋产生较大冲击，降低除尘效率，缩短滤袋寿命。At present, the most widely used technology for removing dioxins from waste incineration power plant flue gas is "activated carbon injection + bag filter". Although this method has a good removal effect on dioxins, the consumption of activated carbon is relatively high. Large, high operating costs, and because part of the dioxin is adsorbed on the fly ash particles, and the other part exists in the flue gas in the form of gas phase suspension, due to the influence of fly ash and heavy metals in the flue gas, activated carbon has no effect on the Dioxin adsorption effect is not ideal. At the same time, there is an obvious jet phenomenon at the entrance of the existing bag filter, which will lead to uneven air flow in the filter, which will have a greater impact on the filter bag, reduce the dust removal efficiency, and shorten the life of the filter bag.

发明内容：Invention content:

本发明的目的是提供一种高效脱除垃圾焚烧烟气粉尘和二噁英的装置，能够提高二噁英脱除效果，减少活性炭用量，降低运行成本，延长滤袋使用寿命。The purpose of the present invention is to provide a device for efficiently removing dust and dioxins from waste incineration flue gas, which can improve the effect of dioxin removal, reduce the amount of activated carbon, reduce operating costs, and prolong the service life of filter bags.

本发明在现有技术的压缩空气罐(1)，喷吹管(2)，电磁阀(3)，密封花板(4)，箱体(6)，以及压缩空气罐(1.1)，喷吹管(2.2)，电磁阀(3.3)，密封花板(4.4)，箱体(6.6)，本发明特别是将两个布袋除尘器(13及14)以一级和二级的形式串联，是在一级和二级布袋除尘器烟气进口通道后面均布置导流板(7及7.7)，在一级布袋除尘器(13)出口(11)处设置活性炭喷射装置(12)。The present invention is in prior art compressed air tank (1), spray pipe (2), electromagnetic valve (3), sealing flower plate (4), casing (6), and compressed air tank (1.1), spray pipe ( 2.2), solenoid valve (3.3), sealing flower plate (4.4), box body (6.6), the present invention especially connects two bag filter (13 and 14) in series with the form of one-stage and two-stage, is in one Deflectors (7 and 7.7) are arranged behind the flue gas inlet channels of the first-stage and second-stage baghouses, and an activated carbon injection device (12) is arranged at the outlet (11) of the first-stage baghouse (13).

以上本发明导流板倾斜布置。The above deflectors of the present invention are arranged obliquely.

本发明所述导流板中带有通孔。There are through holes in the deflector of the present invention.

以上本发明导流板的高度沿烟气流动方向逐渐增高。The height of the deflector in the present invention is gradually increased along the flow direction of the flue gas.

本发明导流板上附有钝体的半径沿烟气流动方向逐渐变小。The radius of the blunt body attached to the deflector plate of the present invention gradually decreases along the flow direction of the flue gas.

与现有的技术相比，本发明采用以上技术方案有以下技术效果：Compared with the prior art, the present invention adopts the above technical solutions to have the following technical effects:

1、在烟气入口处后面设置导流板，使布袋除尘器内的气流分布更加均匀，提高除尘效率，减少射流对滤袋的冲刷，延长布袋使用寿命。1. A deflector is set behind the flue gas inlet to make the air flow in the bag filter more uniform, improve the dust removal efficiency, reduce the erosion of the jet to the filter bag, and prolong the service life of the bag.

2、将一级和二级布袋除尘器串联，在一级布袋除尘器烟气出口处喷射活性炭，飞灰和附着在飞灰上面的固相二噁英和重金属被一级布袋脱除，气相二噁英则穿过一级布袋与活性炭混合，一级布袋出口喷射的活性炭在没有飞灰等颗粒物的干扰下能够更有效的吸附气相二噁英，大大提高二噁英和重金属的脱除效率，减少活性炭用量。同时，由于颗粒物等已被一级布袋脱除，二级布袋清灰时卸下的是较为干净的活性炭，可以实现活性炭的重复利用，降低运行成本。2. Connect the first-stage and second-stage bag filters in series, spray activated carbon at the flue gas outlet of the first-stage bag filter, the fly ash and the solid-phase dioxins and heavy metals attached to the fly ash are removed by the first-stage bag, and the gas-phase two The oxins pass through the first-stage cloth bag and are mixed with activated carbon. The activated carbon sprayed from the outlet of the first-stage cloth bag can more effectively absorb gaseous dioxins without the interference of fly ash and other particles, greatly improving the removal efficiency of dioxins and heavy metals, reducing Activated carbon dosage. At the same time, since the particles have been removed by the first-level bag, the clean activated carbon is unloaded during the second-level bag cleaning, which can realize the reuse of activated carbon and reduce operating costs.

现有技术的“一种垃圾焚烧炉两端式烟气净化系统”是一个烟气净化工艺，它使用的两级布袋除尘中间还有SCR、半干法、活性炭烟气净化工艺。而本发明的两级之间没有任何其他工艺，脱除的是同种污染物，且布袋烟气入口处结构也不同。The prior art "a waste incinerator two-end flue gas purification system" is a flue gas purification process, which uses SCR, semi-dry method, and activated carbon flue gas purification processes in the middle of the two-stage bag dust removal. However, there is no other process between the two stages of the present invention, the same kind of pollutants are removed, and the structure of the bag flue gas inlet is also different.

附图说明：Description of drawings:

图1表示本发明的总体结构示意图。Fig. 1 shows the overall structure schematic diagram of the present invention.

具体实施方式：Detailed ways:

根据图1所示，本发明在现有技术的压缩空气罐1，喷吹管2，电磁阀3，密封花板4，箱体6，以及压缩空气罐1.1，喷吹管2.2，电磁阀3.3，密封花板4.4，箱体6.6的基础上，本发明特别是将两个布袋除尘器13及14以一级和二级的形式串联，在一级13和二级布装除尘器13.13烟气进口通道8及8.8后面均布装置导流板7及7.7，在一级布袋除尘器13出口11处设置活性炭喷射装置12。According to Fig. 1, the present invention is in the prior art compressed air tank 1, blowing pipe 2, solenoid valve 3, sealing flower plate 4, box body 6, and compressed air tank 1.1, blowing pipe 2.2, solenoid valve 3.3, sealing On the basis of the flower plate 4.4 and the box body 6.6, the present invention especially connects two bag filters 13 and 14 in series in the form of primary and secondary, and installs the flue gas inlet channel of the dust collector 13.13 in the primary 13 and secondary 8 and 8.8 are evenly distributed behind the deflectors 7 and 7.7, and an activated carbon injection device 12 is arranged at the outlet 11 of the first-stage bag filter 13.

以上本发明导流板倾斜布置。导流板中带有通孔，导流板的高度沿烟气流动方向逐渐增高，导流板上附有钝体的半径沿烟气流动方向逐渐小。The above deflectors of the present invention are arranged obliquely. There are through holes in the deflector, the height of the deflector gradually increases along the direction of flue gas flow, and the radius of the blunt body attached to the deflector gradually decreases along the direction of flue gas flow.

本发明的基本工作原理和工作流程：Basic operating principle and work flow of the present invention:

垃圾焚烧烟气从一级布袋除尘器13烟气进口烟道8进入，经过导流挡板7穿过滤袋5由下向上流动，颗粒物被滤袋5过滤并形成粉尘层，随着时间的增加，滤袋5表层附着的粉尘颗粒越来越多，此时需要对滤袋进行清灰。采用脉冲清灰系统通过定期或者定压控制进行清灰，清灰工作进行时，颗粒从滤袋表层上脱落，进入灰斗10中，通过卸灰阀9将灰斗10内的飞灰卸到输灰系统。烟气中的粉尘和吸附在粉尘上面的二噁英及重金属通过一级布袋除尘器13被脱除，过滤后的洁净气体经过一级布袋除尘器13烟气出口通道11和活性炭充分混合，从二级布袋除尘器13.13烟气进口通道8.8进入二级布袋除尘器13.13，经过同样的原理将活性炭颗粒及吸附在上面的二噁英和重金属脱除。由于粉尘及附着在上面的二噁英和重金属已被一级布袋除尘器13脱除，一级布袋除尘器13出口喷射的活性炭在没有飞灰等颗粒物的干扰下能够更有效的吸附二噁英和重金属，大大提高二噁英和重金属的脱除效率，减少活性炭用量。同时，由于颗粒物等已被一级布袋除尘器13脱除，二级布袋除尘器13.13清灰时卸下的是比较干净的活性炭，活性炭能够重复利用，降低运行成本。Waste incineration flue gas enters from the flue gas inlet flue 8 of the first-stage bag filter 13, passes through the guide baffle 7 and passes through the filter bag 5 to flow from bottom to top, and the particulate matter is filtered by the filter bag 5 and forms a dust layer. , There are more and more dust particles attached to the surface of the filter bag 5. At this time, the filter bag needs to be cleaned. The pulse cleaning system is used to clean the dust through regular or constant pressure control. When the cleaning work is in progress, the particles fall off from the surface of the filter bag and enter the ash hopper 10. The fly ash in the ash hopper 10 is discharged to the Ash conveying system. The dust in the flue gas and the dioxins and heavy metals adsorbed on the dust are removed through the first-stage bag filter 13, and the filtered clean gas is fully mixed with the flue gas outlet channel 11 of the first-stage bag filter 13 and activated carbon, from The flue gas inlet channel 8.8 of the secondary bag filter 13.13 enters the secondary bag filter 13.13, and the activated carbon particles and the dioxins and heavy metals adsorbed thereon are removed through the same principle. Since the dust and the dioxins and heavy metals attached to it have been removed by the first-stage bag filter 13, the activated carbon sprayed from the outlet of the first-stage bag filter 13 can absorb dioxins and heavy metals more effectively without the interference of fly ash and other particles. , greatly improving the removal efficiency of dioxins and heavy metals, and reducing the amount of activated carbon. At the same time, since the particles have been removed by the first-level bag filter 13, the second-level bag filter 13.13 removes relatively clean activated carbon when cleaning dust, and the activated carbon can be reused to reduce operating costs.

Claims (5)

1.一种高效脱除垃圾焚烧烟气粉尘和二噁英的装置，它包括压缩空气罐(1)，喷吹管(2)，电磁阀(3)，密封花板(4)，箱体(6)，以及压缩空气罐(1.1)，喷吹管(2.2)，电磁阀(3.3)，密封花板(4.4)，箱体(6.6)，其特征是将两个布袋除尘器(13及13.13)以一级和二级的形式串联，在一级和二级布袋除尘器烟气进口通道后面均布置导流板(7及7.7)，在一级布袋除尘器(13)出口(11)处设置活性炭喷射装置(12)。1. A device for efficiently removing waste incineration flue gas dust and dioxins, which comprises a compressed air tank (1), a spray pipe (2), a solenoid valve (3), a sealing flower plate (4), and a casing ( 6), and compressed air tank (1.1), blowing pipe (2.2), solenoid valve (3.3), sealing flower plate (4.4), box body (6.6), which is characterized in that two bag dust collectors (13 and 13.13) It is connected in series in the form of primary and secondary, and deflectors (7 and 7.7) are arranged behind the flue gas inlet channels of the primary and secondary bag filters, and are set at the outlet (11) of the primary bag filter (13) Activated carbon injection device (12). 2.根据权利要求1所述一种高效脱除垃圾焚烧烟气粉尘和二噁英的装置，其特征是导流板倾斜布置。2. A device for efficiently removing waste incineration flue gas dust and dioxins according to claim 1, characterized in that the deflectors are arranged obliquely. 3.根据权利要求2所述的一种高效脱除垃圾焚烧烟气粉尘和二噁英的装置，其特征是导流板中带有通孔。3. A device for efficiently removing waste incineration flue gas dust and dioxins according to claim 2, characterized in that the guide plate has a through hole. 4.根据权利要求2所述的一种高效脱除垃圾焚烧烟气粉尘和二噁英的装置，其特征是导流板的高度沿烟气流动方向逐渐增高。4. A device for efficiently removing dust and dioxins from waste incineration flue gas according to claim 2, characterized in that the height of the guide plate increases gradually along the direction of flue gas flow. 5.根据权利要求2所述的一种高效脱除垃圾焚烧烟气粉尘和二噁英的装置，其特征是导流板上附有钝体的半径沿烟气流动方向逐渐变小。5. A device for efficiently removing dust and dioxins from waste incineration flue gas according to claim 2, characterized in that the radius of the blunt body attached to the deflector gradually decreases along the direction of flue gas flow.
CN201910632285.3A 2019-07-13 2019-07-13 A device for efficiently removing dust and dioxin from waste incineration flue gas Pending CN110404349A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114321960A (en) * 2021-12-07 2022-04-12 北京科技大学 A waste incineration flue gas treatment system
CN116371104A (en) * 2023-04-18 2023-07-04 中国石油大学(北京) A dusty gas filtration system

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CN203634975U (en) * 2013-08-30 2014-06-11 福建龙净环保股份有限公司 Air flow distribution device of blast-furnace gas bag-type dust collector
CN103977644A (en) * 2014-06-04 2014-08-13 盐城福泰环保设备有限公司 Flow guiding device of bag type dust collector
CN203777813U (en) * 2014-01-10 2014-08-20 合肥水泥研究设计院 Settling-type ash hopper air inlet structure
CN104722191A (en) * 2015-02-04 2015-06-24 绿色动力环保集团股份有限公司 Harmless combined deacidifying and dust removing method and harmless combined deacidifying and dust removing system for flue gas obtained by combusting domestic garbage
CN105605587A (en) * 2015-11-29 2016-05-25 集美大学 Waste incineration treatment system
CN210786572U (en) * 2019-07-13 2020-06-19 广州环投设计研究院有限公司 Device of high-efficient desorption msw incineration flue gas dust and dioxin

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203634975U (en) * 2013-08-30 2014-06-11 福建龙净环保股份有限公司 Air flow distribution device of blast-furnace gas bag-type dust collector
CN203777813U (en) * 2014-01-10 2014-08-20 合肥水泥研究设计院 Settling-type ash hopper air inlet structure
CN103977644A (en) * 2014-06-04 2014-08-13 盐城福泰环保设备有限公司 Flow guiding device of bag type dust collector
CN104722191A (en) * 2015-02-04 2015-06-24 绿色动力环保集团股份有限公司 Harmless combined deacidifying and dust removing method and harmless combined deacidifying and dust removing system for flue gas obtained by combusting domestic garbage
CN105605587A (en) * 2015-11-29 2016-05-25 集美大学 Waste incineration treatment system
CN210786572U (en) * 2019-07-13 2020-06-19 广州环投设计研究院有限公司 Device of high-efficient desorption msw incineration flue gas dust and dioxin

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114321960A (en) * 2021-12-07 2022-04-12 北京科技大学 A waste incineration flue gas treatment system
CN116371104A (en) * 2023-04-18 2023-07-04 中国石油大学(北京) A dusty gas filtration system

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