CN105771506A - A dust removal system for industrial waste cracking and incineration tail gas - Google Patents

A dust removal system for industrial waste cracking and incineration tail gas Download PDF

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CN105771506A
CN105771506A CN201610129302.8A CN201610129302A CN105771506A CN 105771506 A CN105771506 A CN 105771506A CN 201610129302 A CN201610129302 A CN 201610129302A CN 105771506 A CN105771506 A CN 105771506A
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tail gas
tower
layer
dust
filler
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CN105771506B (en
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张文国
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China Electrical Construction Group Hebei Engineering Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • 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
    • B01D53/04—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 stationary adsorbents

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

Abstract

The invention discloses a dust removal treatment system for industrial waste cracking incineration tail gas, which comprises a tail gas cooling tower, a multilayer filter tower, a multilayer bag-type dust remover, a biological affinity dust removal tower, a tail gas recirculation system, an induced draft fan, an air compressor, a dust collection tower, an air blower and the like. The shaddock peel filler is selected as a square block filler in the multilayer filter tower, and the volume of the filler in each filler box from bottom to top is 8cm3、3.375cm3、1cm3. The treatment system is particularly effective in removing particles with small particle sizes, and after the treatment of the treatment system, the removal rate of the particles with particle sizes smaller than 2.5 microns in tail gas reaches more than 99.5%, and the removal rate of the particles with particle sizes smaller than 0.5 micron reaches more than 99.0%.

Description

A kind of industrial refuse cracking incineration tail gas dust removing treatment system
Technical field
The present invention relates to a kind of industrial refuse cracking incineration tail gas dust removing treatment system, belong to the exhaust-gas treatment field in field of Environment Protection.
Background technology
Rubbish can be carried out minimizing, resource and harmless treatment to have by industrial refuse and incineration technology, can reduce the features such as garbage loading embeading floor space in a large number and receive publicity.The built garbage burning factory 68 in the whole nation (except Hong Kong, Macao, Taiwan) at present, disposal ability reaches 33000 ton per days, and burning disposal rate is risen to current 12.9% by 2.9% in 2013.Due to the particularity of industrial refuse, inevitably resulting from substantial amounts of gaseous contaminant in burning process, wherein dust is a kind of main atmosphere pollution, if effectively not administering, environment will be caused severe contamination, and being detrimental to health.Carrying the pellet not being particle diameter less than 10 μm, especially the particle diameter pellet less than 2.5 μm is the main reason forming haze, it is possible to directly, in people's suction body, entered alveolar, and human health damage is very big.
Dust collection method commonly used at present mainly has airtight process of cleaning, bag dust-removing method, high-pressure electrostatic method and wet method retrogradation.But said method is general not good to the removal effect of the particle diameter pellet less than 2.5 μm.
Summary of the invention
For prior art Problems existing, the present invention provides a kind of industrial refuse cracking incineration tail gas dust removing treatment system, and this system includes tail gas cooling tower, multiple filtration tower, laminates bag dust collector, biological affine gas wash tower, tail gas recirculation system, air-introduced machine, air compressor machine, dust tower, aerator etc.；nullThe tail gas produced in rubbish cracking incinerator connects the air intake of tail gas cooling tower by pipeline，The gas outlet of tail gas cooling tower connects the air inlet of multiple filtration tower bottom by pipeline，Dust mouth bottom tail gas cooling tower connects the left side dust inlet of dust tower by pipeline，The gas outlet of multiple filtration top of tower side connects the first air intake on the left of laminates bag dust collector by pipeline，The gas outlet, right side of laminates bag dust collector connects the bottom air intake of biological affine gas wash tower by pipeline，The gas outlet, top of biological affine gas wash tower connects the air intake of tail gas recirculation system by pipeline，The gas outlet of tail gas recirculation system connects air-introduced machine by pipeline，The air outlet of air-introduced machine connects exhaust emission pipeline，The gas outlet of air compressor machine connects the air intake on laminates bag dust collector top by pipeline，The dust mouth of laminates bag dust collector connects the dust inlet of dust tower by pipeline，The air intake vent of tail gas recirculation system connects aerator by pipeline；Wherein, installing chiller and flying dust discharger in tail gas cooling tower, design temperature is 50 DEG C-80 DEG C；Include tail gas inside multiple filtration tower from bottom to top successively and enter relief area, tail gas reaction zone, tail gas discharges relief area, tower bottom region is that tail gas enters relief area, top of tower region is that tail gas discharges relief area, reaction zone is on average divided into 4 layers from bottom to top, every floor height 40cm, it is followed successively by active carbon layer, silica gel particle layer, Fructus Citri grandis cortex and attapulgite soil layer, interlayer is separated by fine metal mesh, every layer, reaction zone all includes draw-in groove three groups parallel, vertical separation 10cm between draw-in groove, often group draw-in groove places stuffing box, stuffing box height 8cm, fill out respectively in stuffing box and put active carbon filler every layer corresponding, silica gel particle filler, pomelo peel filler, attapulgite filler；Biological affine gas wash tower is internal is the stainless steel structure with Os Draconis, wherein secure 3 layers of biological convergence filter membrane side by side, filter membrane is attached with high activity ball saccharomyces cerevisiae, Rhodosporidium toruloides and Moraxella streptococcus etc., its biological activity process can produce substantial amounts of affinity biological slime, pellet in waste gas is when passing through, fully can be infiltrated by affinity biological slime, occur between granule to converge effect, progressively aggregate into larger-diameter particulate matter and be adhered in mucus, realize the removal of pellet by changing the biological filter membrane that converges.
Further, the particle diameter of the pellet that biological convergence filter membrane can be removed is minimum is 0.5 μm.
Further, arranging electrostatic equipment in dust tower, the voltage of electrostatic equipment is 220v；Tail gas recirculation system place is provided with tail gas automatic on-line monitoring instrument.
Further, arranged in series three layers cloth bag in laminates bag dust collector.
It is an advantage of the current invention that:
(1) technique taste removal purification efficiency is high, and multiple filtration tower absorption resistance coefficient is less, energy consumption is low, be not easy obstruction, later stage replacement operation is easy to maintenance, operation cost is low.
(2) present treatment system is effective especially to the removal of nominal particle size particulate matter, after this process system processes, in tail gas, the clearance of the particle diameter particulate matter less than 2.5 μm reaches more than 99.5%, and the clearance of the particle diameter particulate matter less than 0.5 μm reaches more than 99.0%.
(3) use of present treatment system processes material energy-saving environmental protection, nontoxic, and the garbage of collection all can accomplish unified recycling.
(4) multiple filtration Deethanizer design novel structure, simple to operate, changes material convenient and swift.
Accompanying drawing explanation
Fig. 1 is industrial refuse cracking incineration tail gas dust removing treatment system schematic diagram.
1-tail gas cooling tower, 2-multiple filtration tower, 3-laminates bag dust collector, 4-biological affine gas wash tower, 5-tail gas recirculation system, 6-air-introduced machine, 7-air compressor machine, 8-dust tower, 9-aerator.
Fig. 2 is multiple filtration tower schematic diagram.
21-tail gas enters relief area, 22-active carbon layer, 23-silica gel particle, 24-Fructus Citri grandis cortex, 25-attapulgite soil layer, 26-tail gas discharge relief area, 27-wire netting, 28-draw-in groove, 29-stuffing box.
Detailed description of the invention
Industrial refuse cracking incineration tail gas as shown in Figure 1 processes system, and this system includes tail gas cooling tower 1, multiple filtration tower 2, laminates bag dust collector 3, biological affine gas wash tower 4, tail gas recirculation system 5, air-introduced machine 6, air compressor machine 7, dust tower 8, aerator 9.The tail gas produced in cracking incinerator connects the air intake of tail gas cooling tower 1 by pipeline, and the tail gas from incinerator initially enters tail gas cooling tower 1, and exhaust temperature is down to 50 DEG C-80 DEG C, to meet the requirement of follow-up bag-type dusting.Cooling down in tail gas cooling tower 1 to spray in tail gas cooling tower 1 after water is atomized by compressed air and directly contact with tail gas, the height of tail gas cooling tower arranges sufficiently high to guarantee that the atomized water sprayed into can evaporate completely.While cooling, in tail gas, the dust of part falls in the hopper at the bottom of tail gas cooling tower, then delivers in dust tower 8 through conveyer.Dust mouth bottom tail gas cooling tower 1 connects the left side dust inlet of dust tower 8 by pipeline, the gas outlet of tail gas cooling tower 1 connects the air inlet bottom multiple filtration tower 2 by pipeline, tail gas enters into relief area bottom multiple filtration tower 2, by relief area through being placed in the absorption of activated carbon in the stuffing box 29 on draw-in groove 28, silica gel particle, pomelo peel, attapulgite, eliminate the partial particulate thing and some penetrating odors that exist in tail gas.The gas outlet of multiple filtration tower 2 top-side connects the first air intake on the left of laminates bag dust collector 3 by pipeline, the gas outlet of air compressor machine 7 connects the air intake on laminates bag dust collector 3 top by pipeline, tail gas from multiple filtration tower 2, after the absorption of activated carbon, pomelo peel, silica gel particle and attapulgite, enter back into laminates bag dust collector 3, remaining particulate matter in tail gas, attapulgite, the activated carbon that sprays into are each attached to filter bag surface, form a metafiltration cake.When tail gas is by after laminates bag dust collector 3, it is attached to the flying dust of filter bag outer surface and compresses Air Reverse through air compressor machine 7 and be blown into and enter in dust tower 8.nullThe gas outlet, right side of laminates bag dust collector 3 connects the bottom air intake of biological affine gas wash tower 4 by pipeline，Biological affine gas wash tower 4 is internal is the stainless steel structure with Os Draconis，Wherein secure 3 layers of biological convergence filter membrane side by side，Filter membrane is attached with high activity ball saccharomyces cerevisiae、Rhodosporidium toruloides and Moraxella streptococcus etc.，Its biological activity process can produce substantial amounts of affinity biological slime，Pellet in waste gas is when passing through，Fully can be infiltrated by affinity biological slime，A thin liquid adhesive layer is formed with the plane that contacts of mucus at pellet，Pellet in adhesive layer attracts each other，Make the pellet in adhesive layer denser，Particulate matter can be produced in local converge effect and make the coverage of this effect constantly expand，Progressively aggregate into larger-diameter particulate matter and be adhered in mucus，The removal of pellet is realized by changing the biological filter membrane that converges.The gas outlet, top of biological affine gas wash tower 4 connects the air intake of tail gas recirculation system 5 by pipeline, when tail gas enters in tail gas recirculation system 5, on-line monitoring system is started working, result according to display, tail gas up to standard opens in line pipeline, tail gas has in line pipeline to discharge after flowing through air-introduced machine 6, the result of display has abnormal numerical value, then close in line pipeline, open recirculation conduit, now aerator starts toward air-supply in system, and tail gas mixes with fresh air along recirculation conduit and is fed again in tail gas cooling tower 1.The gas outlet of tail gas recirculation system 5 connects air-introduced machine 6 by pipeline, and the air outlet of air-introduced machine 6 connects exhaust emission pipeline.The air intake vent of tail gas recirculation system 5 connects aerator 9 by pipeline.nullWherein，Multiple filtration tower 2 includes tail gas and enters relief area 21、Active carbon layer 22、Silica gel particle 23、Fructus Citri grandis cortex 24、Attapulgite soil layer 25、Tail gas discharges relief area 26、Wire netting 27、Draw-in groove 28、Stuffing box 29，In multiple filtration tower 2, reactive moieties is on average divided into 4 layers from bottom to top，Every floor height 40cm，For active carbon layer 22、Silica gel particle layer 23、Fructus Citri grandis cortex 24 and attapulgite soil layer 25，Every layer of centre is separated 27 by fine metal mesh，Tower bottom region is that tail gas enters relief area 21，Top of tower region is that tail gas discharges relief area 26，Identical design is had at each layer of reactive moieties，Including draw-in groove 28 three groups parallel，The long 5cm of draw-in groove 28，28 vertical separation 10cm of draw-in groove，Often group draw-in groove places stuffing box 29，The high 8cm of stuffing box 29，It is made up of filler bar，Fill out respectively in stuffing box 29 and put filler every layer corresponding，Activated carbon、Silica gel particle、Pomelo peel、Attapulgite；The built-in three layers tabular bandlet of laminates bag dust collector 3, three layers cloth bag series arrangement.Arranging electrostatic equipment in dust tower 8, the voltage of electrostatic equipment is 220v；Tail gas recirculation system 5 place is provided with tail gas automatic on-line monitoring instrument.
After this process system processes, in tail gas, the clearance of the particle diameter particulate matter less than 2.5 μm reaches more than 99.5%, and the clearance of the particle diameter particulate matter less than 0.5 μm reaches more than 99.0%.

Claims (4)

1.一种工业垃圾裂化焚烧尾气除尘处理系统，其特征在于，该系统包括尾气冷却塔、多层过滤塔、多层布袋除尘器、生物亲和除尘塔、尾气再循环系统、引风机、空压机、集尘塔、鼓风机等；垃圾裂化焚烧炉中产生的尾气通过管道连接尾气冷却塔的入气口，尾气冷却塔的出气口通过管道连接多层过滤塔底部的进气口，尾气冷却塔底部的出尘口通过管道连接集尘塔的左侧入尘口，多层过滤塔顶部侧面的出气口通过管道连接多层布袋除尘器左侧第一入气口，多层布袋除尘器的右侧出气口通过管道连接生物亲和除尘塔的底部入气口，生物亲和除尘塔的顶部出气口通过管道连接尾气再循环系统的入气口，尾气再循环系统的出气口通过管道连接引风机，引风机的出风口连接尾气排放管道，空压机的出气口通过管道连接多层布袋除尘器上部的入气口，多层布袋除尘器的出尘口通过管道连接集尘塔的入尘口，尾气再循环系统的入风口通过管道连接鼓风机；其中，尾气冷却塔内安装冷却装置与飞灰排出装置，设定温度为50℃-80℃；多层过滤塔内部自下而上依次包括尾气进入缓冲区、尾气反应区、尾气排出缓冲区，塔底部区域为尾气进入缓冲区，塔顶部区域为尾气排出缓冲区，反应区自下而上平均等分为4层，每层高40cm，依次为活性炭层、硅胶颗粒层、柚子皮层和凹凸棒土层，层间由细金属网分隔，反应区每层都包括三组平行的卡槽，卡槽之间高度间隔10cm，每组卡槽上放置填料盒，填料盒高8cm，填料盒内分别填放每层对应的活性炭填料、硅胶颗粒填料、柚子皮填料、凹凸棒土填料；生物亲和除尘塔内部为带龙骨的不锈钢结构，其中并排固定了3层生物汇聚滤膜，滤膜上附着有高活性球酿酒酵母菌、圆红冬孢酵母菌和莫拉氏链球菌等，其生物活动过程中会产生大量的亲和性生物粘液，废气中的可吸入颗粒物在通过时，会被亲和性生物粘液充分浸润，颗粒间发生汇聚效应，逐步聚合成较大直径的颗粒物而被粘附在粘液中，通过更换生物汇聚滤膜实现可吸入颗粒物的去除。1. An industrial waste cracking and incineration tail gas dedusting treatment system is characterized in that the system includes a tail gas cooling tower, a multi-layer filter tower, a multi-layer bag filter, a bio-affinity dust removal tower, a tail gas recirculation system, an induced draft fan, an air Compressor, dust collection tower, blower, etc.; the tail gas generated in the waste cracking incinerator is connected to the air inlet of the tail gas cooling tower through the pipe, and the gas outlet of the tail gas cooling tower is connected to the air inlet at the bottom of the multi-layer filter tower through the pipe, and the tail gas cooling tower The dust outlet at the bottom is connected to the dust inlet on the left side of the dust collection tower through a pipe, and the air outlet on the top side of the multi-layer filter tower is connected to the first air inlet on the left side of the multi-layer bag filter through a pipe, and the right side of the multi-layer bag filter. The air outlet is connected to the bottom air inlet of the bio-affinity dedusting tower through a pipeline, the top air outlet of the bio-affinity dedusting tower is connected to the air inlet of the exhaust gas recirculation system through a pipeline, and the air outlet of the exhaust gas recirculation system is connected to the induced draft fan through a pipeline, and the induced draft fan The air outlet of the air compressor is connected to the exhaust gas discharge pipe, the air outlet of the air compressor is connected to the upper air inlet of the multi-layer bag filter through the pipe, and the dust outlet of the multi-layer bag filter is connected to the dust inlet of the dust collection tower through the pipe, and the exhaust gas is recirculated The air inlet of the system is connected to the blower through a pipeline; among them, a cooling device and a fly ash discharge device are installed in the tail gas cooling tower, and the set temperature is 50°C-80°C; the interior of the multi-layer filter tower includes the tail gas entering the buffer zone, Tail gas reaction zone, tail gas discharge buffer zone, the bottom area of the tower is the tail gas entering the buffer zone, the top area of the tower is the tail gas discharge buffer zone, the reaction zone is divided into 4 layers on average from bottom to top, each layer is 40cm high, followed by activated carbon layer, Silica gel particle layer, grapefruit cortex layer and attapulgite soil layer, the layers are separated by fine metal mesh, each layer of the reaction zone includes three sets of parallel slots, the height interval between the slots is 10cm, and a packing box is placed on each set of slots, The stuffing box is 8cm high, and the stuffing box is filled with the corresponding activated carbon filler, silica gel particle filler, grapefruit peel filler, attapulgite clay filler for each layer; the interior of the bio-affinity dust removal tower is a stainless steel structure with keel, in which 3 layers are fixed side by side Bio-convergence filter membrane, on which highly active Saccharomyces cerevisiae, Rhodosporidium toruloides, and Streptococcus molarii are attached to the filter membrane. During their biological activities, a large amount of affinity biological mucus will be produced. When the inhaled particles pass through, they will be fully infiltrated by the affinity biological mucus, and the aggregation effect will occur between the particles, which will gradually aggregate into larger diameter particles and be adhered to the mucus. The removal of inhalable particles can be achieved by replacing the bio-convergence filter membrane . 2.根据权利要求1所述的一种工业垃圾裂化焚烧尾气除尘处理系统，其特征在于，生物汇聚滤膜能够去除的可吸入颗粒物的粒径最小为0.5μm。2 . The industrial waste cracking and incineration tail gas dedusting treatment system according to claim 1 , wherein the particle diameter of the inhalable particulate matter that can be removed by the bio-convergence filter membrane is at least 0.5 μm. 3.根据权利要求1所述的一种工业垃圾裂化焚烧尾气除尘处理系统，其特征在于，集尘塔内设置静电装置，静电装置的电压为220v；尾气再循环系统处设有尾气自动在线监测仪。3. A kind of industrial waste cracking and incineration tail gas dedusting treatment system according to claim 1, characterized in that, an electrostatic device is arranged in the dust collection tower, and the voltage of the electrostatic device is 220v; the tail gas recirculation system is equipped with an automatic online monitoring of tail gas instrument. 4.根据权利要求1所述的一种工业垃圾裂化焚烧尾气除尘处理系统，其特征在于，多层布袋除尘器内串联布置三层布袋。4. The industrial waste cracking and incineration tail gas dedusting treatment system according to claim 1, characterized in that three layers of cloth bags are arranged in series in the multi-layer bag filter.
CN201610129302.8A 2016-03-08 2016-03-08 A dust removal system for industrial waste cracking and incineration tail gas Active CN105771506B (en)

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