CN110479086A - For cooperateing with the device and method for eliminating NOx and VOCs in exhaust gas - Google Patents

For cooperateing with the device and method for eliminating NOx and VOCs in exhaust gas Download PDF

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Publication number
CN110479086A
CN110479086A CN201910484004.4A CN201910484004A CN110479086A CN 110479086 A CN110479086 A CN 110479086A CN 201910484004 A CN201910484004 A CN 201910484004A CN 110479086 A CN110479086 A CN 110479086A
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China
Prior art keywords
module
exhaust gas
nox
component
ammonia
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CN201910484004.4A
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Chinese (zh)
Inventor
孟庆锐
展宗城
梁鹏
郅立鹏
刘鑫
邵成成
杨艳林
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Qingdao Environmental Protection Technology Co Ltd Naboko
QINGDAO HUASHIJIE ENVIRONMENT PROTECTION TECHNOLOGY Co Ltd
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Qingdao Environmental Protection Technology Co Ltd Naboko
QINGDAO HUASHIJIE ENVIRONMENT PROTECTION TECHNOLOGY Co Ltd
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Priority to CN201910484004.4A priority Critical patent/CN110479086A/en
Publication of CN110479086A publication Critical patent/CN110479086A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8631—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8678—Removing components of undefined structure
    • B01D53/8687—Organic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/869—Multiple step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8696—Controlling the catalytic process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/90—Injecting reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Treating Waste Gases (AREA)

Abstract

The present invention relates to integrated apparatus and its method that NOx and VOCs exhaust gas is eliminated in a kind of collaboration, it includes dry filter component that the integrated apparatus of NOx and VOCs exhaust gas is eliminated in the collaboration, the cold component of table, zeolite wheel set assembly, back-fire relief device assembly, catalysis-oxidation module, spray ammonia component and SCR catalytic module organic assembling, wherein, exhaust gas is through dry filter module, the cold module of table removes particulate matter, dust, and after cooling, the adsorption zone in zeolite module and cooling zone are respectively enterd by a certain percentage, it is connected afterwards with chimney into adsorption zone exhaust gas is purified, cooling zone outlet exhaust enters zeolite rotor module after heat exchange module exchanges heat and area is desorbed, then catalysis-oxidation module and SCR catalytic module are subsequently entered after fire arrester, finally it is connected with chimney.The present invention, which cooperates with, eliminates NOx and VOCs, and system high efficiency is stablized, and solves the problems, such as to generate NOx containing NOx and the oxidation process of organic exhaust gas containing N, while improving catalysis-oxidation, SCR catalytic module utilization rate.For apparatus of the present invention without civil engineering, installation, mobility is strong.

Description

For cooperateing with the device and method for eliminating NOx and VOCs in exhaust gas
Technical field
The present invention relates to field of gas purification, specifically, are related to a kind of collaboration of movable high-efficiency and eliminate NOx's and VOCs Integrated apparatus and method.
Background technique
Volatile organic compounds (VOCs, VolatileOrganicCompounds) becomes the atmosphere pollution mainly controlled One of object brings heavy pressure to ecology and environment, can generate that toxicity is stronger, persistence is longer secondary under chemical action Pollutant, its harmfulness of further expansion.In this regard, country has put into effect harsh discharge standard in succession, to control VOCs discharge. VOCs processing, conventional effective method has absorption method, catalytic oxidation and Adsorption Concentration-catalytic oxidation, in the improvement side VOCs There is very big deficiency in face.Absorption method is a kind of processing method of pollutant transfer, and organic matter is not thoroughly carried out innoxious place Reason.Catalytic oxidation is under the action of catalyst, organic pollutant to be converted to H2O and CO2, but catalytic oxidation to low concentration, Wind Volume organic exhaust gas need to heat exhaust gas to reach catalyst running temperature, there is the disadvantages of investment is big, energy consumption is high. Adsorption Concentration-catalytic oxidation carries out Adsorption Concentration to low concentration gas, improves VOCs concentration in exhaust gas, while reducing air quantity, To reduce system scale, while the reaction heat generated using VOCs oxidation, but there are equipment volumes big, long construction period, maintenance The disadvantages of inconvenient.In addition, catalytic oxidation, Adsorption Concentration-catalytic oxidation are difficult to handle organic exhaust gas containing N, NOx can not be up to standard Discharge.
Adsorption Concentration is integrated with catalysis oxidation to be combined, and can be improved system performance, is usually dense with activated carbon adsorption bed Compression system realizes Adsorption Concentration in conjunction with catalytic oxidation unit, and efficiently uses oxidation heat and adsorbent bed is desorbed, and adsorbs Bed realizes alternately initiative regeneration.But device is batchwise adsorption-regeneration, and equipment volume is huge, and acticarbon has peace Full hidden danger.
Patent CN 109126383 discloses a kind of VOC waste gas purification all-in-one machine, first with photocatalysis+spray washing pair VOC exhaust gas is pre-processed, then concentrated runner concentration and catalytic oxidation treatment, and still, equipment flowsheet is complicated, at spray Contain a large amount of vapor in exhaust gas after reason, humidity is in a saturated state, and the vapor in exhaust gas and VOC substance are in concentration runner Competitive Adsorption is generated, concentration runner adsorbs vapor and reduces the absorption to VOC, while increasing desorption energy consumption.Patent CN 103394270 disclose a kind of movable integral organic waste gas treatment device, patent with the rotary-type adsorbent bed of continuous rotation and For catalytic bed as core processing unit, organic exhaust gas enters catalytic bed after adsorbent bed is concentrated, and rotating wheel formula adsorbent bed is realized Continuous adsorption-regeneration, but patent described device cannot eliminate NOx in exhaust gas.
It is currently used for the integrated apparatus of VOCs processing, mainly using active carbon or zeolite molecular sieve as Adsorption Concentration unit, Cooperate catalytic oxidizing equipment.It is complicated, bulky that there are device structures, can not eliminate NOx and processing organic exhaust gas containing N.
Summary of the invention
In view of the problems of the existing technology and insufficient, the present invention is provided to cooperate with to eliminate NOx and VOCs in exhaust gas Device and method, thus effectively overcome above-mentioned apparatus there are the shortcomings that.
The present invention provides a kind of for cooperateing with the device for eliminating NOx and VOCs in exhaust gas, including cold group of dry filter, table Part, zeolite wheel set assembly, back-fire relief device assembly, catalysis-oxidation module, heat exchanger, spray ammonia component and SCR catalytic module, wherein institute It states dry filter to be connected by the cold component of the table with the zeolite wheel set assembly, there are two gas for the zeolite wheel set assembly tool Body exports and is connected respectively with the back-fire relief device assembly and heat exchanger, the back-fire relief device assembly and the catalysis-oxidation module It is connected, the catalysis-oxidation module is connected and is connected with the heat exchanger, the catalysis-oxidation module and the heat exchanger Between pipeline be equipped with spray ammonia component, the heat exchanger is connected with the SCR catalytic module.
Further, the zeolite wheel set assembly includes zeolite runner and driving device, and the zeolite runner is equipped with Adsorption zone, desorption area and cooling zone, the adsorption zone, desorption area and cooling zone alternately change with the circular-rotation of zeolite runner, The gas outlet of the cold component of table is connected with the entrance of the entrance of adsorption zone and cooling zone respectively；The cooling zone passes through Heat-exchanging component is connected with De contamination area, and the outlet in the desorption area is connected with the entrance of the back-fire relief device assembly.
Further, the catalysis-oxidation module includes heating device and catalytic unit, the entrance of the heating device and institute The outlet for stating back-fire relief device assembly is connected, and the outlet of the heating device is connected with the entrance of the catalytic unit, the catalysis Device outlet is connected with the heat-exchanger rig.
Further, catalyst overtemperature cold wind component is provided between the heating device and the catalytic unit, it is described to urge Agent overtemperature cold wind component includes mending cold air motor-driven valve and cooling blower, and described one end for mending cold air motor-driven valve passes through cooling Pipeline between blower and the heating device and the catalytic unit is connected, it is described mend cold air motor-driven valve the other end with Atmosphere communicates, and the cold air for introducing atmosphere when the gas temperature for being transferred to catalyst is excessively high cools down for it.
Further, the catalytic unit includes the single tube reactor of at least two mutually independent laid out in parallel and is arranged Insulating cover outside it, the single tube reactor include VOC oxidation catalyst, the sealing gasket being successively arranged from the inside to the outside And metal shell.
Further, the spray ammonia component includes ammonia storage bin, ammonia delivery pump and ammonia atomized spray unit, the ammonia atomization spray It penetrates on the pipeline that unit is arranged between the catalysis-oxidation module and the heat exchanger, the ammonia atomized spray unit passes through Ammonia delivery pump is connected with ammonia storage bin.
Further, the spray ammonia component further includes ammonia metering units and exhaust gas temperature controller, and the ammonia metering units are set It sets on the pipeline between the ammonia atomized spray unit and ammonia delivery pump, for measuring the dosage of ammonia.
Further, the SCR catalytic module include the SCR catalyst for being successively socketed setting from the inside to the outside, sealing gasket and Metal shell；The upper and lower ends of the SCR catalyst are respectively air inlet and air outlet, the hot end of the air inlet and heat exchanger Outlet is connected, and the gas outlet is connected with chimney.
Further, further include sensor module, the sensor module include: be arranged in dry filter one end into Air valve；Urgent exhaust valve and pressure controller on the catalysis-oxidation module are set；It is separately positioned on entering for heating module The heating module inlet temperature controller and heating module outlet temperature controller of mouth and outlet；It is separately positioned on the catalysis mould The catalytic module inlet temperature controller and catalytic module outlet temperature controller of block entrance and outlet；It is separately positioned on described change The heat exchange module cold-side inlet temperature controller and heat exchange module cold side outlet temperature controller of thermal modules cold-side inlet and outlet； The SCR catalytic module inlet temperature controller and SCR catalytic module for being separately positioned on the SCR catalytic module entrance and exit go out Mouth temperature controller；It is separately positioned on the SCR catalytic module entrance NOx sensor of the SCR reactor module entrance and exit NOx sensor is exported with SCR catalytic module.
The present invention also provides a kind of methods that NOx and VOCs in exhaust gas is eliminated in collaboration, are used for using as above any described The device of NOx and VOCs in exhaust gas is eliminated in collaboration, comprising the following steps:
1) containing NOx, volatile organic compounds exhaust gas through dry filter be used to going dust in removing exhaust gas and Organic exhaust gas after grain object reduces exhaust gas temperature through the cold component of table, obtains at the level-one of chalk dust removing and particulate matter and cooling processing Organic exhaust gas is managed,
2) the coagulation organic exhaust gas in step 1) is divided into two parts, and a part enters the absorption of zeolite wheel set assembly Area is discharged into atmosphere through chimney by the purified gas of adsorption zone；Another part enters the cooling zone of zeolite wheel set assembly, successively Enter heating component after cooling zone, heat exchanger, the desorption area of zeolite wheel set assembly, back-fire relief device assembly, obtains secondary treatment Organic exhaust gas；
3) secondary treatment organic exhaust gas obtained in step 2) is passed sequentially through into catalysis-oxidation module, spray ammonia component and SCR Catalytic module, the organic exhaust gas of be eliminated middle NOx and VOCs, is discharged into atmosphere by chimney.
Wherein, in the step 3):
As the temperature difference Δ T=that heating component inlet temperature controller and heating component outlet temperature controller detect When T511-T510 > preset temperature, opens heating component and gas is heated, the exhaust gas after heating enters catalysis-oxidation module Carry out catalysis oxidation；Exhaust gas after catalysis oxidation enters SCR catalytic module after heat exchanger；
When spraying temperature T > preset temperature of the exhaust gas temperature controller detection in ammonia component, starting spray ammonia component starts to spray Ammonia；
The NOx concentration of NOx sensor detection is exported according to SCR catalytic module entrance NOx sensor and SCR catalytic module, The ammonia metering units of control spray ammonia component.
The beneficial effects of the present invention are: dynamic formula of the invention efficiently cooperates with the integrated apparatus energy of elimination NOx and VOCs NOx and VOCs is eliminated in enough disposable collaborations, and system high efficiency is stablized, and solves to generate containing NOx and the oxidation process of organic exhaust gas containing N The problem of NOx, while improving catalysis-oxidation, SCR catalytic module utilization rate.Dynamic formula of the invention simultaneously, which efficiently cooperates with, eliminates NOx It is installed with the integrated apparatus of VOCs without civil engineering, mobility is strong.It is 100-800mg/m when entering to suck N exhaust gas VOCs concentration3 When, the purification efficiency of zeolite rotor module adsorption zone is greater than 90%, and catalysis-oxidation module is to the removal efficiency of VOCs up to 99% More than, SCR catalytic module is greater than 95% to the removal efficiency of NOx, NOx < 50mg/m in outlet exhaust3, NH3Escape is less than 3ppm.
Detailed description of the invention
Fig. 1, the present invention are used to cooperate with the schematic diagram for eliminating the device of NOx and VOCs in exhaust gas
Fig. 2, catalysis of the invention-oxidation module structural schematic diagram
Fig. 3, single tube reactor diagrammatic cross-section of the invention
Fig. 4, single tube reactor end view of the invention
Fig. 5, SCR catalytic module diagrammatic cross-section of the invention
In Fig. 1 to Fig. 4, parts list represented by the reference numerals are as follows:
1, dry filter component, 2, the cold component of table, 3, zeolite wheel set assembly, 4, back-fire relief device assembly, 5, catalysis-oxidation group Part, 6, heat-exchanging component, 7, spray ammonia component, 8, SCR catalytic module
Area is desorbed in S1, zeolite wheel set assembly adsorption zone, S2, zeolite wheel set assembly cooling zone, S3, zeolite wheel set assembly
71, ammonia storage bin, 72, ammonia delivery pump, 73, ammonia metering units, 74, ammonia atomized spray unit
F1, air-introduced machine, F2, desorption blower, F3, cooling blower
V2, V1, air inlet motor-driven valve mend cold air motor-driven valve, EV1, urgent exhaust valve, P1, pressure controller
521, catalysis-oxidation module single tube reactor, 5210, VOC oxidation catalyst, 5211, single tube reactor sealing lining Pad, 5212, single tube reactor shell, 81, SCR catalyst, 82, catalytic module sealing gasket, 83, catalytic module metal shell
T510, heating component inlet temperature controller, T511, heating component outlet temperature controller, T520, catalytic module Inlet temperature controller, T521, catalytic module outlet temperature controller, T60, heat-exchanging component cold-side inlet temperature controller, T61, heat-exchanging component cold side outlet temperature controller, T70, spray ammonia component exhaust gas temperature controller T80, SCR catalytic module entrance Temperature controller, T81, SCR catalytic module outlet temperature controller, C80, SCR catalytic module entrance NOx sensor, C81, SCR Catalytic module exports NOx sensor
Specific embodiment
The principle of the invention and feature are described below in conjunction with drawings and examples, illustrated embodiment is served only for explaining this Invention, not limits the scope of the invention.
As shown in Figs. 1-5, Fig. 1 is the structural schematic diagram for the integrated apparatus that NOx and VOCs is eliminated in efficiently collaboration of the invention, Including dry filter component 1, the cold component 2 of table, zeolite wheel set assembly 3, back-fire relief device assembly 4, catalysis-oxidation module 5, heat-exchanging component 6, ammonia component 7, SCR catalytic module 8 are sprayed, wherein the dry filter component 1 is connected with the cold component 2 of the table, cold group of the table Part 2 is connected with the zeolite wheel set assembly 3, the zeolite wheel set assembly 3 simultaneously with the back-fire relief device assembly 4 and heat-exchanging component 6 It is connected, the back-fire relief device assembly 4 is connected with the catalysis-oxidation module 5, and catalysis-oxidation module 5 is connected and the heat-exchanging component 6 are connected, and the heat-exchanging component 6 is connected with the SCR catalytic module 8, and the spray ammonia component 7 is connected to the catalysis-oxidation group On pipeline between part 5 and the heat-exchanging component 6.
Wherein, the zeolite wheel set assembly 3 includes zeolite runner and driving device, and the zeolite runner is equipped with adsorption zone S1, desorption area S3 and cooling zone S2, the adsorption zone S1, desorption area S3 and cooling zone S2 replace with the circular-rotation of zeolite runner Variation, the gas outlet of the cold component of table is connected with the entrance of the entrance of adsorption zone S1 and cooling zone S2 respectively；It is described Cooling zone S2 is connected by heat-exchanging component with De contamination area S2, the outlet and the back-fire relief device assembly 4 of the desorption area S3 Entrance is connected.Inside the zeolite runner duct and surface is coated with adsorbent.
Wherein, institute's catalysis-oxidation module 5 includes heating device 51 and catalytic unit 52, and the heating device enters Mouth is connected with the outlet of the back-fire relief device assembly 4, the outlet of the heating device 51 and the entrance phase of the catalytic unit 52 Even, the outlet of catalytic unit 52 is connected with the heat-exchanger rig 6.The catalytic module 52 is anti-by mutually independent single tube Answer device 521 side by side assembling constitute, outside setting thermal insulation material, the single tube reactor 521 include VOC oxidation catalyst 5210, Sealing gasket 5211 and metal shell 5212.
Urgent exhaust valve EV1 and pressure controller P1, and the heating component are connected on the catalysis-oxidation module 5 Catalyst overtemperature cooling air unit is provided between 51 and the catalytic module 52, the catalyst overtemperature cooling air unit is by mending cold sky Gas motor-driven valve V2 and cooling blower F3 is constituted, and described one end for mending cold air motor-driven valve V2 passes through cooling blower F3 and the heating Pipeline between component 51 and catalytic module 52 is connected, and the other end for mending cold air motor-driven valve V2 is communicated with atmosphere.
Wherein, in the catalysis-oxidation module 5,51 entrance of heating component is provided with heating component inlet temperature control Device T510 processed, the outlet of heating component 51 are provided with heating component outlet temperature controller T511, and 52 entrance of catalytic module is set Set catalytic module inlet temperature controller T520, the outlet of the catalytic module 52 setting catalytic module outlet temperature controller T521.6 cold-side inlet of heat-exchanging component is provided with heat-exchanging component cold-side inlet temperature controller T60, and the heat-exchanging component 6 is cold It brings out mouth and is provided with heat-exchanging component cold side outlet temperature controller T61.
Wherein, the spray ammonia component 7 includes ammonia storage bin 71, ammonia delivery pump 72, ammonia metering units 73, ammonia atomized spray list 74 and exhaust gas temperature controller T70 of member.
Wherein, the SCR catalytic module 8 includes SCR catalyst 81, sealing gasket 82 and metal shell 83.The SCR is urged Change 8 entrance of component and be provided with SCR catalytic module inlet temperature controller T80, the outlet of SCR catalytic module 8 is provided with SCR and urges Change module outlet temperature controller T81.
Wherein, 8 entrance of SCR reactor assemblies is provided with SCR catalytic module entrance NOx sensor C80, the SCR The outlet of catalytic module 8 is provided with SCR catalytic module outlet NOx sensor C81.
Wherein, one end of the dry filter component 1 is connected by intake valve V1 with exhaust gas discharge end, the dry filter The other end of component 1 is connected with the surface air cooler 2；The outlet absorption with the zeolite wheel set assembly 3 respectively of the surface air cooler 2 The entrance of area S1 is connected with the entrance of cooling zone S2, and entrance adsorption zone S1, cooling zone S2 air quantity ratio are 9:1~7:3, described The outlet of adsorption zone S1 is connected by air-introduced machine F1 with chimney 11；The outlet cooling zone S2 enters with 6 cold end of heat-exchanging component Mouth is connected, and 6 cold side outlet of heat-exchanging component is connected with desorption area S2 entrance, the outlet desorption area S2 and the back-fire relief 4 entrance of device assembly is connected, the outlet of back-fire relief device assembly 4 and 51 entrance of heating component in the catalysis-oxidation module 5 It is connected；The outlet of heating component 51 is connected with 52 entrance of catalytic module, the outlet of catalytic module 52 and the heat exchange 6 hot-side inlet of component is connected；6 hot end of the heat-exchanging component outlet is connected with 8 entrance of SCR catalytic module, and the outlet of component 8 is logical Desorption air-introduced machine F2 is crossed to be connected with chimney 11.
The present invention also provides the methods that NOx and VOCS is eliminated in collaboration, are cooperateed with using movable high-efficiency and eliminate NOx's and VOCS Integrated apparatus, comprising the following steps: the exhaust gas containing NOx, volatile organic compounds is used to remove through dry filter component 1 Dust and particulate matter in exhaust gas reduce exhaust gas temperature through the cold component 2 of table through treated the organic exhaust gas of dry filter component 1, By removing the organic exhaust gas of chalk dust removing and particulate matter and cooling processing, a part enters the adsorption zone S1 of zeolite wheel set assembly 3, inhales Attached area S1 exports purified gas and is discharged into atmosphere through chimney 11 by air-introduced machine F1；
Another part enters the cooling zone S2 of zeolite wheel set assembly 3, and the gas of the outlet cooling zone S2 is heated through heat-exchanging component 6 Enter the desorption area S3 of zeolite wheel set assembly 3 afterwards, the gas of the outlet desorption area S3 enters heating component after back-fire relief device assembly 4 51, when the temperature difference that 51 inlet temperature controller T510 of heating component and 51 outlet temperature controller T511 of heating component are detected When Δ T=T511-T510 > preset temperature, opens heating component 51 and gas is heated, the exhaust gas after heating enters catalysis- Oxidation module 5 carries out catalysis oxidation；Exhaust gas after catalysis oxidation enters SCR catalytic module 8 after heat-exchanging component 6；Spray ammonia component 7 In exhaust gas temperature controller 75 detect temperature T > preset temperature when, starting spray ammonia component 7 start spray ammonia；It is catalyzed according to SCR 8 entrance NOx sensor C80 of component and SCR catalytic module 8 export the NOx concentration of NOx sensor C81 detection, control spray ammonia component 7 ammonia metering units 73；Exhaust gas after SCR catalytic module is discharged into atmosphere through chimney 11 by desorption blower F2.In addition, described By several independent single tube reactors 521, assembling is constituted catalytic module 51 in catalysis-oxidation module 5 side by side, single tube reactor VOC oxidation catalyst such as 267x101+152mm catalyst is arranged in 521 inside, when VOCs concentration is 5g/m3, at 280 DEG C of temperature, VOC of the high conversion rate in 99%, exhaust gas can be substantially oxidized.Catalysis-oxidation reaction process generates a large amount of reaction heat, through exchanging heat Component 6 is used for 3 adsorption zone of zeolite wheel set assembly VOCs after exchanging heat is desorbed.
SCR catalyst is set inside the SCR catalytic module 8, when NOx concentration is 1000mg/m in inlet exhaust gases3, NH3/ NOx molar ratio is 0.85-0.95, and the NO concentration that SCR catalytic module 8 exports is less than 50mg/m3, NH3Escapement ratio is less than 3ppm.Dress Setting only needs a small amount of energy input in operational process.
The single tube reactor 521 is padded with fire resistant seal between catalyst 5210 and metal shell 5212 and is encapsulated, single tube 1-4 block catalyst 5210 is installed, the diameter of catalyst 5210 is 190-700mm, the height of catalyst 5210 inside reactor 521 For 70-500mm.
Wherein, temperature < 400 DEG C of the catalytic module inlet temperature controller T520 are set, and set the catalysis group Temperature<600 DEG C of part outlet temperature controller T521, when temperature>400 DEG C of T520 detection or temperature>600 of T521 detection DEG C, catalytic module cooling air unit is opened, while reducing the output power of heating component 51.
Wherein, temperature > preset temperature that the temperature controller T70 in the spray ammonia component 7 is detected is set, spray ammonia is opened Component carries out spray ammonia, and according to the NOx sensor C81 of 8 entrance of SCR catalytic module, the ammonia metering units 73 of ammonia component 7 are sprayed in control, Control spray ammonia flow.
After above-mentioned heat exchange, heating, catalysis-oxidation, SCR reaction, NOx and VOCs in exhaust gas are obtained efficiently organic exhaust gas Removal, is thoroughly decomposed into innoxious N2、CO2And H2O, clean gas are discharged into atmosphere.
The present invention, which can cooperate with, eliminates NOx and VOCs, and device efficient stable solves to aoxidize containing NOx and organic exhaust gas containing N Journey leads to the problem of NOx, while improving catalysis-oxidation, SCR catalytic module utilization rate.It is when entering to suck N exhaust gas VOCs concentration 100-800mg/m3When, the purification efficiency of zeolite rotor module adsorption zone is greater than 90%, removal of the catalysis-oxidation module to VOCs Efficiency is greater than 95% up to removal efficiency of 99% or more, the SCR catalytic module to NOx, NOx < 50mg/m in outlet exhaust3, NH3 Escape is less than 3ppm.In addition, the device of the invention, without civil engineering, installation, mobility is strong.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (11)

1. a kind of for cooperateing with the device for eliminating NOx and VOCs in exhaust gas, which is characterized in that cold including dry filter (1), table Component (2), zeolite wheel set assembly (3), back-fire relief device assembly (4), catalysis-oxidation module (5), heat exchanger (6), spray ammonia component (7) With SCR catalytic module (8), wherein the dry filter (1) passes through the cold component of the table (2) and the zeolite wheel set assembly (3) be connected, the zeolite wheel set assembly (3) tool there are two gas vent and respectively with the back-fire relief device assembly (4) and heat exchanger (6) it is connected, the back-fire relief device assembly (4) is connected with the catalysis-oxidation module (5), the catalysis-oxidation module (5) It is connected and is connected with the heat exchanger (6), the pipeline between the catalysis-oxidation module (5) and the heat exchanger (6) is equipped with It sprays ammonia component (7), the heat exchanger (6) is connected with the SCR catalytic module (8).
2. according to claim 1 for cooperateing with the device for eliminating NOx and VOCs in exhaust gas, which is characterized in that the boiling Stone wheel set assembly (3) includes zeolite runner and driving device, the zeolite runner be equipped with adsorption zone (S1), desorption area (S3) and Cooling zone (S2), the adsorption zone (S1), desorption area (S3) and cooling zone (S2) alternately change with the circular-rotation of zeolite runner, The gas outlet of the cold component of table is connected with the entrance of the entrance of adsorption zone (S1) and cooling zone (S2) respectively；It is described cold But area (S2) is connected by heat-exchanging component with De contamination area (S2), the outlet and the back-fire relief device assembly of desorption area (S3) (4) entrance is connected.
3. according to claim 2 for cooperateing with the device for eliminating NOx and VOCs in exhaust gas, which is characterized in that described to urge Change-oxidation module (5) includes heating device (51) and catalytic unit (52), the entrance of the heating device and the fire arrester group The outlet of part (4) is connected, and the outlet of the heating device (51) is connected with the entrance of the catalytic unit (52), the catalysis Device (52) outlet is connected with the heat-exchanger rig (6).
4. according to claim 3 for cooperateing with the device for eliminating NOx and VOCs in exhaust gas, which is characterized in that described to add Catalyst overtemperature cold wind component, the catalyst overtemperature cold wind group are provided between thermal (51) and the catalytic unit (52) Part includes mending cold air motor-driven valve and cooling blower, and described one end for mending cold air motor-driven valve passes through cooling blower and the heating Pipeline between device (51) and the catalytic unit (52) is connected, the other end for mending cold air motor-driven valve and big gas phase Logical, the cold air for introducing atmosphere when the gas temperature for being transferred to catalyst is excessively high cools down for it.
5. according to claim 3 for cooperateing with the device for eliminating NOx and VOCs in exhaust gas, which is characterized in that described Catalytic unit (52) includes the single tube reactor (521) of at least two mutually independent laid out in parallel and the guarantor for being set in its outside Warm outer cover, the single tube reactor (521) include VOC oxidation catalyst (5210), the sealing gasket being successively arranged from the inside to the outside (5211) and metal shell (5212).
6. according to claim 1 for cooperateing with the device for eliminating NOx and VOCs in exhaust gas, which is characterized in that the spray Ammonia component (7) includes ammonia storage bin (71), ammonia delivery pump (72) and ammonia atomized spray unit (74), the ammonia atomized spray unit (74) on the pipeline being arranged between the catalysis-oxidation module (5) and the heat exchanger (6), the ammonia atomized spray unit (74) it is connected by ammonia delivery pump (72) with ammonia storage bin (71).
7. according to claim 6 for cooperateing with the device for eliminating NOx and VOCs in exhaust gas, which is characterized in that the spray Ammonia component (7) further includes ammonia metering units (73) and exhaust gas temperature controller (T70), and the ammonia metering units (73) are arranged in institute It states on the pipeline between ammonia atomized spray unit (74) and ammonia delivery pump (72), for measuring the dosage of ammonia.
8. according to claim 1 for cooperateing with the device for eliminating NOx and VOCs in exhaust gas, which is characterized in that the SCR Catalytic module (8) includes the SCR catalyst (81) for being successively socketed setting from the inside to the outside, sealing gasket (82) and metal shell (83)；The upper and lower ends of the SCR catalyst (81) are respectively air inlet and air outlet, the air inlet and heat exchanger (6) Hot end outlet is connected, and the gas outlet is connected with chimney (11).
9. -8 any device for being used to cooperate with NOx and VOCs in elimination exhaust gas according to claim 1, which is characterized in that It further include sensor module, the sensor module includes: intake valve of the setting in one end of dry filter (1)；Setting exists Urgent exhaust valve (EV1) and pressure controller (P1) on the catalysis-oxidation module (5)；It is separately positioned on heating module (51) the heating module inlet temperature controller (T510) and heating module outlet temperature controller (T511) of entrance and exit； It is separately positioned on the catalytic module inlet temperature controller (T520) and catalytic module of the catalytic module (52) entrance and exit Outlet temperature controller (T521)；The heat exchange module cold end for being separately positioned on the heat exchange module (6) cold-side inlet and outlet enters Mouth temperature controller (T60) and heat exchange module cold side outlet temperature controller (T61)；It is separately positioned on the SCR catalytic module (8) the SCR catalytic module inlet temperature controller (T80) of entrance and exit and SCR catalytic module outlet temperature controller (T81)；It is separately positioned on the SCR catalytic module entrance NOx sensor (C80) of SCR reactor module (8) entrance and exit NOx sensor (C81) is exported with SCR catalytic module.
10. a kind of method that NOx and VOCs in exhaust gas is eliminated in collaboration, which is characterized in that using as described in claim 1-9 is any For cooperate with elimination exhaust gas in NOx and VOCs device, comprising the following steps:
1) dust and particle that the exhaust gas containing NOx, volatile organic compounds is used to go in removing exhaust gas through dry filter (1) Organic exhaust gas after object reduces exhaust gas temperature through the cold component of table (2), obtains the level-one of chalk dust removing and particulate matter and cooling processing Organic exhaust gas is handled,
2) the coagulation organic exhaust gas in step 1) is divided into two parts, and a part enters the adsorption zone of zeolite wheel set assembly (3) (S1), atmosphere is discharged into through chimney (11) by the purified gas of adsorption zone (S1)；Another part enters zeolite wheel set assembly (3) Cooling zone (S2), successively by cooling zone (S2), heat exchanger (6), the desorption area (S3) of zeolite wheel set assembly (3), fire arrester Component (4) enters heating component (51) afterwards, obtains secondary treatment organic exhaust gas；
3) by secondary treatment organic exhaust gas obtained in step 2) pass sequentially through catalysis-oxidation module (5), spray ammonia component (7) and SCR catalytic module (8), the organic exhaust gas of be eliminated middle NOx and VOCs are discharged into atmosphere by chimney (11).
11. the method that NOx and VOCs in exhaust gas is eliminated in collaboration according to claim 10, which is characterized in that in the step It is rapid 3) in:
When heating component (51) inlet temperature controller (T510) and heating component (51) outlet temperature controller (T511) detect When the temperature difference Δ T=T511-T510 > preset temperature arrived, opens heating component (51) and gas is heated, it is useless after heating Gas enters catalysis-oxidation module (5) and carries out catalysis oxidation；Exhaust gas after catalysis oxidation enters SCR catalysis group after heat exchanger (6) Part (8)；
When spraying temperature T > preset temperature of exhaust gas temperature controller (75) detection in ammonia component (7), starting spray ammonia component (7) Start to spray ammonia；
According to SCR catalytic module (8) entrance NOx sensor (C80) and SCR catalytic module (8) outlet NOx sensor (C81) inspection The NOx concentration of survey, the ammonia metering units (73) of control spray ammonia component (7).
CN201910484004.4A 2019-06-05 2019-06-05 For cooperateing with the device and method for eliminating NOx and VOCs in exhaust gas Withdrawn CN110479086A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111889101A (en) * 2020-08-13 2020-11-06 清华大学 Modified composite oxide catalyst for synergistic purification of VOCs and NO and preparation method thereof
CN114100268A (en) * 2021-11-27 2022-03-01 柳州市海达新型材料科技股份有限公司 Method for treating ammonia-containing waste gas in sectional manner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111889101A (en) * 2020-08-13 2020-11-06 清华大学 Modified composite oxide catalyst for synergistic purification of VOCs and NO and preparation method thereof
CN111889101B (en) * 2020-08-13 2021-10-12 清华大学 Modified composite oxide catalyst for synergistic purification of VOCs and NO and preparation method thereof
CN114100268A (en) * 2021-11-27 2022-03-01 柳州市海达新型材料科技股份有限公司 Method for treating ammonia-containing waste gas in sectional manner

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