CN208302463U - A kind of VOCs exhaust gas advanced purification system - Google Patents

A kind of VOCs exhaust gas advanced purification system Download PDF

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Publication number
CN208302463U
CN208302463U CN201820354095.0U CN201820354095U CN208302463U CN 208302463 U CN208302463 U CN 208302463U CN 201820354095 U CN201820354095 U CN 201820354095U CN 208302463 U CN208302463 U CN 208302463U
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exhaust gas
vocs exhaust
gas
temperature
unit
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高立东
张傑
徐仲均
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Suzhou Zhongmai New Energy Technology Co.,Ltd.
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Suzhou Mai Wo Ingegneria Ambientale Srl
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Abstract

The utility model discloses a kind of VOCs exhaust gas advanced purification systems.The system comprises VOCs exhaust gas treatment units and adsorption tower regeneration unit, the adsorption tower regeneration unit includes more than two adsorbent equipments, low-temperature catalytic oxidation reaction unit and desorption apparatus, each adsorbent equipment includes absorption and control mechanism and Regeneration control mechanism, and the VOCs exhaust gas treatment unit includes normal-temperature deep purification reaction apparatus;The gas vent of the adsorbent equipment is connected with the gas access of normal-temperature deep purification reaction apparatus, also it is connected with the gas access of low-temperature catalytic oxidation reaction unit, the gas vent of the low-temperature catalytic oxidation reaction unit is connected with the gas access of desorption apparatus, and the gas vent of each desorption apparatus is connected with the gas access of low-temperature catalytic oxidation reaction unit.The VOCs exhaust gas advanced purification system of the utility model is simple and reasonable, can effectively handle the organized or inorganization VOCs exhaust gas of industrial discharge.

Description

A kind of VOCs exhaust gas advanced purification system
Technical field
The utility model relates to a kind of VOCs waste gas cleaning system, in particular to a kind of VOCs exhaust gas advanced purification system, Belong to industrial organic exhaust gas processing technology field.
Background technique
With the attention increasingly that China pollutes VOCs, the discharge in the national city He Ge, the constantly stringent VOCs of province's environmental regulation Standard puts into effect the city in place at present, there are Beijing, Shanghai, Chongqing, Tianjin, Guangdong, Jiangsu, Hebei, Shandong, Zhejiang in province in addition to national standard River, Sichuan etc..Be related to industry have bio-pharmaceuticals, rubber product, synthetic leather and artificial leather, synthetic resin, organic chemicals manufacture, Auto repair, industrial coating, vehicle complete vehicle manufacture coating process, printing, wood furniture manufacture, shipping industry, electronics manufacturing, The industries such as Production Container, shoemaking, packaging, aluminum profile industry, petroleum refining, pesticide manufacture, ink, adhesive, coating.It is related to Volatile organic contaminant mainly have fatty hydrocarbon, fragrant hydrocarbon, chlorinated hydrocarbon, ketone, aldehyde, Alcohol, polyalcohols, ether, phenol, epoxy compounds, ester, acid compounds, amine, nitrile compounds.
VOCs processing technique includes having destructive destruction technology and nondestructive recovery technology on the whole, is destroyed Technology includes heat storage type combustion, catalysis burning, biodegrade, low-temperature plasma etc.;Recovery technology includes condensation, absorption and sorption Technology etc..Although heat storage type combustion, catalysis burning treatment effeciency are high, energy consumption is high, and very big burden is brought to enterprise;Condensation, It absorbs and adsorption technology operating cost is high;It is ineffective that non-thermal plasma trap handles high-concentration organic waste gas, and discharged By-product is generated in journey, easily causes secondary pollution.Therefore, develop that Low investment, process flow is simple, low energy consumption, treatment effect The technology of apparent removal VOCs has very big social benefit.
The patent of Publication No. CN105833666A discloses a kind of method of VOCs processing, and process characteristic is will to discharge It is adsorbed after the VOCs gas sampling in source through runner adsorbent equipment, the VOCs exhaust gas after absorption is discharged into atmosphere.But this method does not have To the processing of VOCs exhaust gas nontoxicization, and it only reported processing ethyl acetate exhaust gas.
The patent of Publication No. CN202983466U discloses a kind of alternating sorbent regeneration gas purification device, and the device is special Point is by exhaust gas by three absorbers in parallel, and then to waste gas purification by adsorbsion, after an absorber adsorption saturation, into Enter reproduced state, second or third absorber are opened, and in cycles, realize alternating with this.But the device is not nontoxic to exhaust gas Harmless treatment, cooling using steam regeneration and cooling water, regeneration temperature is limited to cause the reproduction time longer, operating cost compared with Height, and a large amount of water is introduced, vapor is discharged together with adsorbate easily brings secondary pollution.
The patent of Publication No. CN106807243A discloses the method for room temperature degradation fan engine room VOCs, this method technique Process is by O2It is passed through electric discharge device, modified monatomic catalyst reaction equipment is then entered together with VOCs exhaust gas, into The oxidation of row VOCs exhaust fume catalytic.The characteristics of this technique is the regeneration of catalyst being heated by microwave.But use pure O2, running cost With height;Electric discharge device generates by-product, and the electric spark generated that discharges easily brings security risk.
Publication No. CN106178932A, CN105879676A, CN106076086A, CN106039963A, The patent of CN10607608A, CN106076087A and CN105879624A individually disclose normal-temperature efficient catalytic degradation synthetic leather, Pesticide, vehicle spray painting, petrochemical industry, the method for printing and pharmaceutical industry VOCs exhaust gas.Its technical process is similar, and exhaust gas passes through two Step washing, exhaust gas enter catalytic reactor together with ozone, ozone reacted in catalytic reactor with water in generate O2And hydroxyl Then free radical generates redox reaction with exhaust gas under the effect of the catalyst.But the technique washing process introduce water, Lye or acid solution, catalysis reaction carry out in the liquid phase, have used a large amount of water, lye or acid solution, and the waste water of generation needs further Processing.
Utility model content
The main purpose of the utility model is to provide a kind of VOCs exhaust gas advanced purification systems, to overcome in the prior art Deficiency.
For realization foregoing purpose, the technical solution adopted in the utility model includes:
The utility model embodiment provides a kind of VOCs exhaust gas advanced purification system comprising VOCs exhaust gas treatment unit With adsorption tower regeneration unit, the adsorption tower regeneration unit includes more than two adsorbent equipment, low-temperature catalytic oxidation reaction unit And desorption apparatus, each adsorbent equipment include absorption and control mechanism and Regeneration control mechanism, the VOCs exhaust-gas treatment list Member includes normal-temperature deep purification reaction apparatus;
The adsorbent equipment is at least contact VOCs exhaust gas with adsorbent, to make in VOCs exhaust gas at least partly VOCs organic matter is adsorbed by adsorbent, and obtains low concentration VOCs exhaust gas;
The gas vent of the adsorbent equipment is connected with the gas access of the normal-temperature deep purification reaction apparatus, described Normal-temperature deep purification reaction apparatus is by 90% or more low concentration VOCs exhaust gas conversion at CO2And H2O;
The gas vent of each adsorbent equipment is also connected with the gas access of low-temperature catalytic oxidation reaction unit, institute It states high concentration VOCs exhaust gas of the low-temperature catalytic oxidation reaction unit at least to generate to regeneration and carries out purified treatment, the low temperature The gas vent of catalytic oxidation reaction device is connected by blower with the gas access of the desorption apparatus, the desorption apparatus Gas vent be connected with the gas access of the low-temperature catalytic oxidation reaction unit.
In some embodiments, the normal-temperature deep purification reaction apparatus includes O3Generating unit and catalyst filling list Member.
Further, the gas vent of the normal-temperature deep purification reaction apparatus is connected with the gas access of blower unit Logical, the gas vent of the blower unit is connected with atmosphere.
Further, the desorption apparatus is also connected with an air compensation device, and the air compensation device is connected with atmosphere, until Less to make fresh air enter adsorption tower regeneration unit.
Compared with the prior art, the advantages of the utility model are: the VOCs exhaust gas advanced purification system of the utility model It is simple and reasonable, the organized or inorganization VOCs exhaust gas of industrial discharge can be effectively handled, and treatment effect meets country Or the discharge standard of place regulation correlation VOCs exhaust gas.
Detailed description of the invention
Fig. 1 is a kind of device and technique stream of VOCs exhaust gas advanced purification system in one exemplary embodiments of the utility model Cheng Tu.
Fig. 2 is a kind of device and process flow chart of VOCs exhaust gas advanced purification system in the utility model embodiment 1.
Fig. 3 is a kind of device and process flow chart of VOCs exhaust gas advanced purification system in the utility model embodiment 2.
Fig. 4 is a kind of device and process flow chart of VOCs exhaust gas advanced purification system in the utility model embodiment 3.
Fig. 5 is a kind of device and process flow chart of VOCs exhaust gas advanced purification system in the utility model embodiment 4.
Appended drawing reference: A-001, A1Adsorption tower, A-002, A2Adsorption tower, A-003, A3Adsorption tower, R-001, R1It is low-temperature catalyzed Oxidation reactor, R-002, R2Normal-temperature deep purification reactor, R-003, R3UV pre-reactor, B-001, B1Air-introduced machine, B-002, B2Blower, B-003, B is desorbed3Mend wind blower.
Specific embodiment
In view of deficiency in the prior art, inventor is studied for a long period of time and is largely practiced, and is able to propose that this is practical new The technical solution of type is mainly a kind of VOCs exhaust gas deep-purifying method and its system.As follows will to the technical solution, in fact Process and principle etc. is applied to be further explained.
The VOCs exhaust gas advanced purification system that the one aspect of the utility model embodiment provides includes VOCs exhaust-gas treatment Unit and adsorption tower regeneration unit, the adsorption tower regeneration unit include more than two adsorbent equipments, low-temperature catalytic oxidation reaction Device and desorption apparatus, each adsorbent equipment include absorption and control mechanism and Regeneration control mechanism, at the VOCs exhaust gas Managing unit includes normal-temperature deep purification reaction apparatus;
The adsorbent equipment is at least contact VOCs exhaust gas with adsorbent, to make in VOCs exhaust gas at least partly VOCs organic matter is adsorbed by adsorbent, and obtains low concentration VOCs exhaust gas;
The gas vent of the adsorbent equipment is connected with the gas access of the normal-temperature deep purification reaction apparatus, described Normal-temperature deep purification reaction apparatus is at least to make low concentration VOCs exhaust gas conversion at CO2And H2O;
The gas vent of each adsorbent equipment is also connected with the gas access of low-temperature catalytic oxidation reaction unit, institute It states high concentration VOCs exhaust gas of the low-temperature catalytic oxidation reaction unit at least to generate to regeneration and carries out purified treatment, the low temperature The gas vent of catalytic oxidation reaction device is connected with the gas access of the desorption apparatus, and the gas of the desorption apparatus goes out Mouth is connected with the gas access of the gas access of each adsorbent equipment, the normal-temperature deep purification reaction apparatus respectively.
Preferably, the number of the adsorbent equipment is in two or more, with no restriction, can be adsorption tower.
Further, each adsorbent equipment includes ontology, and is set to the intrinsic adsorbent.
In some embodiments, the adsorbent includes active carbon, molecular sieve etc., is regenerable sorbent, regeneration period For 2~April, the reproduction time is 24~168h.
Preferably, the iodine number of the active carbon is 400~1300, and ash content 6-16, moisture is less than 5wt%.
Preferably, SiO in the molecular sieve2With Al2O3Ratio be 1.8~2.3, effective aperture be 3A~5A.
In some embodiments, the normal-temperature deep purification reaction apparatus can be normal-temperature deep purification reactor, packet Include O3Generating unit and catalyst filling unit.
Preferably, the O3Generating unit includes UV pre-reactor, at least to make the O in low concentration VOCs exhaust gas2? It is changed into O under the irradiation of ultraviolet light3
Further, the wavelength of the ultraviolet light is 100nm~400nm.
Preferably, the first catalyst in the catalyst filling unit includes the composition metal oxygen using active carbon as carrier Compound catalyst, wherein the load capacity of metal composite oxide is 0.1~5wt% in first catalyst.
Further, first catalyst be Regenrable catalyzed, the regeneration period be 3~June, the reproduction time be 8~ 24h。
Preferably, the gas vent of the normal-temperature deep purification reaction apparatus is connected with the gas access of blower unit, The gas vent of the blower unit is connected with atmosphere.Wherein, the blower unit can be air-introduced machine.
In some embodiments, the low-temperature catalytic oxidation reaction unit can be low-temperature catalytic oxidation reactor.It is described The second catalyst for including in low-temperature catalytic oxidation reaction unit includes with Al2O3The catalyst such as Pt, Pd for carrier.
Further, the load capacity of Pt and/or Pd is 0.1~10wt% in second catalyst.
Further, the absorption and control mechanism includes absorption and control valve, and the Regeneration control mechanism includes Regeneration control Valve.
One of preferably, the desorption apparatus is also connected with an air compensation device, the air compensation device and atmosphere It is connected, at least the fresh air to make 20~30v/v% enters adsorption tower regeneration unit.Wherein, the air compensation device packet It includes and mends wind blower, the desorption apparatus includes desorption blower.
By above-mentioned technical proposal, the VOCs exhaust gas deep-purifying method of the utility model can effectively handle industrial discharge Organized or inorganization VOCs exhaust gas, and treatment effect meet country or place regulation correlation VOCs exhaust gas discharge standard.
Further, the VOCs exhaust gas can be benzene,toluene,xylene, styrene, acrylonitrile, acetone, isopropanol, Ethyl acetate etc., but not limited to this.
Include: using the method that a kind of VOCs exhaust gas advanced purification system of the utility model carries out purified treatment
(1) VOCs exhaust gas and adsorbent are come into full contact in the first adsorbent equipment, makes in the VOCs exhaust gas at least portion Divide VOCs organic matter to be adsorbed by adsorbent, obtains low concentration VOCs exhaust gas;
(2) so that the low concentration VOCs exhaust gas is entered normal-temperature deep purification reaction apparatus, and purified in the normal-temperature deep CO is converted in reaction unit2And H2O, and be emitted into atmosphere;
(3) after the first adsorbent equipment adsorption saturation, the absorption and control mechanism of first adsorbent equipment is closed, is beaten The Regeneration control mechanism of first adsorbent equipment is opened, so that first adsorbent equipment be made to be in reproduced state;Open second The absorption and control mechanism of adsorbent equipment, closes the Regeneration control mechanism of second adsorbent equipment, to make second absorption Device is in adsorbed state;
(4) the high concentration VOCs exhaust gas for generating the first adsorbent equipment regeneration enters low-temperature catalytic oxidation reaction unit Purified treatment is carried out, purified at least partly exhaust gas is made to enter the first adsorbent equipment through desorption apparatus, and makes at least partly to give up Gas and the low concentration VOCs exhaust gas of second adsorbent equipment discharge enter normal-temperature deep purification reaction apparatus jointly, and described CO is converted in normal-temperature deep purification reaction apparatus2And H2O, and be emitted into atmosphere.
In some embodiments, the concentration of the VOCs exhaust gas is 150~1000mg/m3, intake be 500~ 20000m3/h。
Further, the VOCs exhaust gas is the intermittent operation of recycling or the high concentration or low concentration of continuity operation VOCs exhaust gas.
Further, the concentration of the low concentration VOCs exhaust gas is 100~500mg/m3
Further, the concentration of the high concentration VOCs exhaust gas is 500~1000mg/m3
In some embodiments, the VOCs exhaust gas deep-purifying method further include: at first adsorbent equipment In reproduced state, and when the second adsorbent equipment adsorption saturation, by VOCs exhaust gas and adsorbent at least one third adsorbent equipment In come into full contact with, be adsorbed by adsorbent at least partly VOCs organic matter in the VOCs exhaust gas, obtain low concentration VOCs exhaust gas, So that the low concentration VOCs exhaust gas is entered normal-temperature deep purification reaction apparatus, and turns in the normal-temperature deep purification reaction apparatus It is melted into CO2And H2O, and be emitted into atmosphere.
Wherein, the number of the third adsorbent equipment is unlimited, as spare adsorption tower.
Further, first, second, third adsorbent equipment is adsorption tower.
In some embodiments, the VOCs exhaust gas deep-purifying method further include: utilize air compensation device by fresh sky Gas fills into the air hose of the desorption apparatus.Wherein, the air compensation device includes mending wind blower, and the desorption apparatus includes desorption wind Machine.
Further, the desorption apparatus send 70%~80% purified exhaust gas of low-temperature catalytic oxidation reaction unit Enter the first adsorbent equipment or the second adsorbent equipment or third adsorbent equipment.
Further, the wind blower of mending is by 20%~30% fresh air introducing adsorption tower regeneration unit.
Further, the method also includes: will be discharged from the normal-temperature deep purification reaction apparatus using blower unit CO2And H2O is emitted into atmosphere.Wherein, the blower unit includes air-introduced machine.
One of preferably, the VOCs exhaust gas deep-purifying method further include: when first adsorbent equipment Second adsorbent equipment or third adsorbent equipment discharge VOCs exhaust gas concentration be higher than 150mg/m3When, close first absorption The absorption and control mechanism of device or the second adsorbent equipment or third adsorbent equipment opens first adsorbent equipment or the second absorption The Regeneration control mechanism of device or third adsorbent equipment, so that first adsorbent equipment or the second adsorbent equipment or third be made to inhale Adsorption device is in reproduced state.
Further, it under conditions of preheating temperature is 200~450 DEG C, is arranged from the low-temperature catalytic oxidation reaction unit The temperature of purified VOCs exhaust gas out is 100~200 DEG C, preferably 100~150 DEG C.
Further, the 20%~30% of the purified VOCs exhaust gas being discharged from the low-temperature catalytic oxidation reaction unit Gas enters normal-temperature deep purification reaction apparatus.
In some embodiments, the adsorbent includes active carbon, molecular sieve etc., is regenerable sorbent, regeneration period For 2~April, the reproduction time is 24~168h.
Preferably, the iodine number of the active carbon is 400~1300, and ash content 6-16, moisture is less than 5wt%.
Preferably, SiO in the molecular sieve2With Al2O3Ratio be 1.8~2.3, effective aperture be 3A~5A.
In some embodiments, the normal-temperature deep purification reaction apparatus can be normal-temperature deep purification reactor, packet Include O3Generating unit and catalyst filling unit.
Preferably, the O3Generating unit includes UV pre-reactor, at least to make the O in low concentration VOCs exhaust gas2? It is changed into O under the irradiation of ultraviolet light3
Further, the wavelength of the ultraviolet light is 100nm~400nm.
Preferably, the first catalyst in the catalyst filling unit includes the composition metal oxygen using active carbon as carrier Compound catalyst, wherein the load capacity of metal composite oxide is 0.1~5wt% in first catalyst.
Further, first catalyst be Regenrable catalyzed, the regeneration period be 3~June, the reproduction time be 8~ 24h。
In some embodiments, the low-temperature catalytic oxidation reaction unit can be low-temperature catalytic oxidation reactor.It is described The second catalyst for including in low-temperature catalytic oxidation reaction unit includes with Al2O3The catalyst such as Pt or Pd for carrier.
Further, the load capacity of Pt and/or Pd is 0.1~10wt% in second catalyst.
Further, the absorption and control mechanism includes absorption and control valve, and the Regeneration control mechanism includes Regeneration control Valve.
One of preferably, the method can specifically include:
High concentration or low concentration VOCs the exhaust gas shape after adsorption tower adsorbs of intermittent operation or the continuity operation of recycling At low concentration VOCs exhaust gas enter normal-temperature deep purification reactor and be converted to nontoxic small molecule CO2And H2O is discharged by air-introduced machine In atmosphere;After adsorption tower saturation, absorption and control valve is closed, and regeneration control valve is opened, and spare adsorption tower brings into operation;Reproduction Raw high concentration VOCs exhaust gas enters low-temperature catalytic oxidation reactor and carries out purified treatment, and purified exhaust gas a part enters suction Attached tower regeneration unit, a part enters after normal-temperature deep purification reactor is further processed with low concentration VOCs exhaust gas, by drawing Blower is discharged into atmosphere.
Wherein, as one of more typical case study on implementation of the utility model one, the VOCs exhaust gas deep-purifying method It can comprise the further steps of:
(1) VOCs exhaust gas is recycled from pollution sources, makes exhaust gas concentration in 150~1000mg/m3, air quantity is in 500~20000m3/ H, pressure are negative pressure;
(2) step (1) VOCs exhaust gas is obtained to adsorb by the first adsorbent equipment bottom the first adsorbent equipment of feeding, Wherein the VOCs exhaust gas of 60~80v/v% is adsorbed by adsorbent, remaining VOCs exhaust gas at the top of the first adsorbent equipment through being discharged;
It (3) is about (100mg/m by the low concentration being discharged at the top of the first adsorbent equipment in step (2)3) VOCs exhaust gas is frequent Warm device for deep cleaning carries out nontoxicization processing, and the VOCs exhaust gas conversion of 90v/v% or more is at nontoxic small molecule CO2With H2O is discharged into atmosphere by blower unit;
(4) the VOCs exhaust gas concentration being discharged at the top of the first adsorbent equipment in step (2) is higher than 150mg/m3When, at this time The absorption and control valve of one adsorbent equipment is closed, and regeneration control valve is opened, into reproduced state;The absorption and control of second adsorbent equipment Valve is opened, and regeneration control valve is closed, into adsorbed state;
(5) the high concentration VOCs exhaust gas that the regeneration of the first adsorbent equipment generates in step (4) is reacted through low-temperature catalytic oxidation Device carries out nontoxicization processing, and the VOCs exhaust gas conversion of 97v/v% or more is at nontoxic small molecule CO2And H2O;
(6) (temperature is 100 for the gas for nontoxicization for being generated (5) the step of 70~80v/v% by desorption apparatus ~150 DEG C) enter the first adsorbent equipment, the VOCs exhaust gas removing wherein adsorbed is handled, after processing completely, the first absorption dress It sets and enters stand-by state, low-temperature catalytic oxidation reaction unit is out of service;The nontoxic nothing that the step of 20~30v/v% (5) generates Together with the gas of evilization and the second adsorbent equipment tower top discharge low concentration VOCs exhaust gas after the processing of room temperature device for deep cleaning, then It is discharged into atmosphere through blower unit;
(7) fresh air of 20~30v/v% is covered by desorption air hose by air compensation device, for supplementing in step (6) The gas of nontoxicization of the 20~30v/v% drained;
(8) the VOCs exhaust gas concentration being discharged at the top of the second adsorbent equipment in step (4) is higher than 150mg/m3When, at this time The absorption and control valve of two adsorbent equipments is closed, and regeneration control valve is opened, into reproduced state;First adsorbent equipment absorption and control valve It opens, regeneration control valve is closed, into adsorbed state;
(9) the high concentration VOCs exhaust gas that the regeneration of the second adsorbent equipment generates in step (8) is reacted through low-temperature catalytic oxidation Device carries out nontoxicization processing, and the VOCs exhaust gas conversion of 97v/v% or more is at nontoxic small molecule CO2And H2O;
(10) (temperature exists the gas for nontoxicization for being generated (9) the step of 70~80v/v% by desorption apparatus 100~150 DEG C) enter the second adsorbent equipment, the VOCs exhaust gas removing wherein adsorbed is handled, after processing completely, the second absorption Device enters stand-by state, and low-temperature catalytic oxidation reaction unit is out of service;The step of 20~30v/v% (9), generates nontoxic Together with innoxious gas and the first adsorbent equipment tower top discharge low concentration VOCs exhaust gas after the processing of room temperature device for deep cleaning, It is discharged into atmosphere through blower unit again.
Please referring to is a kind of dress of VOCs exhaust gas advanced purification system in one exemplary embodiments of the utility model shown in Fig. 1 It sets and the process flow chart of processing method comprising:
(1) VOCs exhaust gas is recycled from pollution sources, makes exhaust gas concentration in 150~1000mg/m3, air quantity is in 500~20000m3/ H, pressure are negative pressure;
(2) step (1) VOCs exhaust gas is obtained to adsorb by 1 bottom of adsorption tower feeding adsorption tower 1, wherein 60~ The VOCs exhaust gas of 80v/v% is adsorbed by adsorbent, remaining VOCs exhaust gas at the top of adsorption tower 1 through being discharged;
It (3) is about (100mg/m by the low concentration being discharged at the top of adsorption tower 1 in step (2)3) VOCs exhaust gas is through normal-temperature deep Clarifier carries out nontoxicization processing, and the VOCs exhaust gas conversion of 90v/v% or more is at nontoxic small molecule CO2And H2O passes through Air-introduced machine is through smoke stack emission into atmosphere;
(4) when the VOCs exhaust gas concentration being discharged at the top of adsorption tower 1 in step (2) is higher than 150mg/m3When, adsorption tower at this time 1 absorption and control valve is closed, and regeneration control valve is opened, into reproduced state;The absorption and control valve of adsorption tower 2 is opened, regeneration control Valve processed is closed, into adsorbed state;
(5) the high concentration VOCs exhaust gas that the regeneration of adsorption tower 1 generates in step (4) is carried out through low-temperature catalytic oxidation reactor Nontoxicization processing, the VOCs exhaust gas conversion of 97v/v% or more is at nontoxic small molecule CO2And H2O;
(6) (temperature is 100 for the gas for nontoxicization for being generated (5) the step of 70~80v/v% by desorption blower ~150 DEG C) enter adsorption tower 1, the VOCs exhaust gas removing wherein adsorbed is handled, after processing completely, adsorption tower 1 enters spare State, low-temperature catalytic oxidation reactor are out of service;The step of 20~30v/v% (5) generate nontoxicization gas with Low concentration VOCs exhaust gas is discharged together after the processing of room temperature deep purifier, then through air-introduced machine, smoke stack emission in 2 tower top of adsorption tower Into atmosphere;
(7) fresh air of 20~30v/v% is covered into desorption air hose by mending blower, for supplementing row in step (6) The gas of nontoxicization of the 20~30v/v% walked;
(8) when the VOCs exhaust gas concentration being discharged at the top of adsorption tower 2 in step (4) is higher than 150mg/m3When, adsorption tower at this time 2 absorption and control valve is closed, and regeneration control valve is opened, into reproduced state;1 absorption and control valve of adsorption tower is opened, Regeneration control Valve is closed, into adsorbed state;
(9) the high concentration VOCs exhaust gas that the regeneration of adsorption tower 2 generates in step (8) is carried out through low-temperature catalytic oxidation reactor Nontoxicization processing, the VOCs exhaust gas conversion of 97v/v% or more is at nontoxic small molecule CO2And H2O;
(10) (temperature exists the gas for nontoxicization for being generated (9) the step of 70~80v/v% by desorption blower 100~150 DEG C) enter adsorption tower 2, the VOCs exhaust gas removing wherein adsorbed is handled, after processing completely, adsorption tower 2 enters standby With state, low-temperature catalytic oxidation reactor is out of service;The gas for nontoxicization that the step of 20~30v/v% (9) generates Together with going out low concentration VOCs exhaust gas with 1 top row of adsorption tower tower after the processing of room temperature deep purifier, then through air-introduced machine, smoke stack emission Into atmosphere.
The technical solution of the utility model is illustrated in more detail below with reference to exemplary embodiments and attached drawing.
Embodiment 1
As shown in Fig. 2, a kind of VOCs exhaust gas advanced purification system of one exemplary embodiments of the utility model includes A1Absorption Tower, A2Adsorption tower, R1Low-temperature catalytic oxidation reactor, R2Normal-temperature deep purification reactor, B1Air-introduced machine, B2Blower, B is desorbed3It mends Wind blower.Specific step is as follows:
It a. is 150~500mg/m by VOCs exhaust gas (benzene,toluene,xylene, styrene etc.) concentration3Industrial waste gas is through A1It inhales Attached tower, into R2Normal-temperature deep purification reactor obtains about 0.5mg/m3Purification gas with B1Air-introduced machine is discharged in atmosphere;
b.A1After adsorption tower adsorption saturation, through R2Normal-temperature deep purification reactor is greater than 20mg/m3When, A1Adsorption tower enters Reproduced state, 150~500mg/m3Into A2Adsorption tower, through R2The 0.5mg/m that normal-temperature deep purification reactor obtains3Purification Gas is with B1Air-introduced machine is discharged in atmosphere;
c.A1The exhaust gas that adsorption tower enters reproduced state generation enters R1Low-temperature catalytic oxidation reactor, purified exhaust gas Gas enters A after 70%~80% purification1Adsorption tower makes its regeneration, and 20%~30% exhaust gas is through R2Normal-temperature deep purification is anti- Answer device with B1Air-introduced machine is discharged into atmosphere;B3It mends wind blower and 20%~30% fresh air is covered into adsorption tower regeneration unit;
d.A1Enter stand-by state, A after the completion of adsorption tower regeneration2After adsorption tower adsorption saturation, through R2Normal-temperature deep purification is anti- The VOCs concentration of device is answered to be greater than 20mg/m3When, A2Adsorption tower enters reproduced state, 150~500mg/m3Into R1Low-temperature catalyzed oxygen Change reactor, obtained 0.5mg/m3Purification gas with B1Air-introduced machine is discharged in atmosphere.
Embodiment 2
As shown in figure 3, a kind of VOCs exhaust gas advanced purification system of one exemplary embodiments of the utility model, with embodiment 1 The difference is that the A added3Adsorption tower.The equipment of use includes A1Adsorption tower, A2Adsorption tower, A3Adsorption tower, R1Low-temperature catalytic oxidation Reactor, R2Normal-temperature deep purification reactor, B1Air-introduced machine, B2Blower, B is desorbed3Mend wind blower.Specific step is as follows:
It a. is 500~1000mg/m by VOCs exhaust gas (acrylonitrile) concentration3Industrial waste gas is through A1Adsorption tower, into R2Room temperature Deep purifying reactor obtains about 0.3mg/m3Purification gas with B1Air-introduced machine is discharged in atmosphere;
b.A1After adsorption tower adsorption saturation, through R2Normal-temperature deep purification reactor is greater than 0.3mg/m3When, A1Adsorption tower enters Reproduced state, 500~1000mg/m3Into A2Adsorption tower, through R2The 0.3mg/m that normal-temperature deep purification reactor obtains3Purification Gas is with B1Air-introduced machine is discharged in atmosphere;
c.A1The exhaust gas that adsorption tower enters reproduced state generation enters R1Low-temperature catalytic oxidation reactor, purified exhaust gas Gas enters A after 70%~80% purification1Adsorption tower makes its regeneration, and 20%~30% exhaust gas is through R2Normal-temperature deep purification is anti- Answer device with B1Air-introduced machine is discharged into atmosphere;B3It mends wind blower and 20%~30% fresh air is covered into adsorption tower regeneration unit;
D. work as A1Adsorption tower reproduced state does not complete, A2Adsorption tower adsorption saturation, through R2Normal-temperature deep purification reactor gives up Gas is greater than 20mg/m3When, 500~1000mg/m3Exhaust gas enter A3Adsorption tower, through R2Normal-temperature deep purification reactor obtains 0.3mg/m3Purification gas with B1Air-introduced machine is discharged in atmosphere;
e.A1、A2Enter stand-by state, A after the completion of adsorption tower regeneration3After adsorption tower adsorption saturation, through R2Normal-temperature deep is net The VOCs concentration for changing reactor is greater than 0.3mg/m3When, A3Adsorption tower enters reproduced state, 500~1000mg/m3Exhaust gas enter A1Adsorption tower, obtained 0.3mg/m3Purification gas with B1Air-introduced machine is discharged in atmosphere.
Embodiment 3
As shown in figure 4, a kind of VOCs exhaust gas advanced purification system of one exemplary embodiments of the utility model, with embodiment 1 The difference is that ultraviolet generation device and constant temperature catalyzing purification device separate.The equipment of use includes A1Adsorption tower, A2Adsorption tower, R1 Low-temperature catalytic oxidation reactor, R2Normal-temperature deep purification reactor, R3UV pre-reactor, B1Air-introduced machine, B2Blower, B is desorbed3Mend wind Blower.Specific step is as follows:
It a. is 150~500mg/m by VOCs exhaust gas (acetone, isopropanol) concentration3Industrial waste gas is through A1Adsorption tower, into R2 Normal-temperature deep purification reactor obtains about 5mg/m3Purification gas with B1Air-introduced machine is discharged in atmosphere;
b.A1After adsorption tower adsorption saturation, through R2Normal-temperature deep purification reactor is greater than 5mg/m3When, A1Adsorption tower enters again Raw state, 150~500mg/m3Into A2Adsorption tower, through R3UV pre-reactor, then through R2Normal-temperature deep purification reactor obtains 5mg/m3Purification gas with B1Air-introduced machine is discharged in atmosphere;
c.A1The exhaust gas that adsorption tower enters reproduced state generation enters R1Low-temperature catalytic oxidation reactor, purified exhaust gas Gas enters A after 70%~80% purification1Adsorption tower makes its regeneration, and 20%~30% exhaust gas is through R2Normal-temperature deep purification is anti- Answer device with B1Air-introduced machine is discharged into atmosphere;B3It mends wind blower and 20%~30% fresh air is covered into adsorption tower regeneration unit;
d.A1Enter stand-by state, A after the completion of adsorption tower regeneration2After adsorption tower adsorption saturation, through R2Normal-temperature deep purification is anti- The VOCs concentration of device is answered to be greater than 5mg/m3When, A2Adsorption tower enters reproduced state, 150~500mg/m3Into R1Low-temperature catalyzed oxygen Change reactor, obtained 5mg/m3Purification gas with B1Air-introduced machine is discharged in atmosphere.
Embodiment 4
As shown in figure 5, a kind of VOCs exhaust gas advanced purification system of one exemplary embodiments of the utility model, with embodiment 3 The difference is that the air-makeup system added.The equipment of use includes A1Adsorption tower, A2Adsorption tower, A3Adsorption tower, R1Low-temperature catalytic oxidation Reactor, R2Normal-temperature deep purification reactor, R3UV pre-reactor, B1Air-introduced machine, B2Blower, B is desorbed3Mend wind blower.Specific step It is rapid as follows:
It a. is 500~1000mg/m by VOCs exhaust gas (ethyl acetate) concentration3Industrial waste gas is through A1Adsorption tower, through R3UV is pre- Reactor enters back into R2Normal-temperature deep purification reactor obtains about 20mg/m3Purification gas with B1Air-introduced machine is discharged in atmosphere;
b.A1After adsorption tower adsorption saturation, through R2Normal-temperature deep purification reactor is greater than 20mg/m3When, A1Adsorption tower enters Reproduced state, 500~1000mg/m3Into A2Adsorption tower, through R3UV pre-reactor, then through R2Normal-temperature deep purification reactor obtains The 20mg/m arrived3Purification gas with B1Air-introduced machine is discharged in atmosphere;
c.A1The exhaust gas that adsorption tower enters reproduced state generation enters R1Low-temperature catalytic oxidation reactor, purified exhaust gas Gas enters A after 70%~80% purification1Adsorption tower makes its regeneration, and 20%~30% exhaust gas is through R3UV pre-reactor, then Through R2Normal-temperature deep purification reactor is with B1Air-introduced machine is discharged into atmosphere;B3Wind blower is mended by 20%~30% fresh air Cover adsorption tower regeneration unit;
D. work as A1Adsorption tower reproduced state does not complete, A2Adsorption tower adsorption saturation, through R2Normal-temperature deep purification reactor gives up Gas is greater than 20mg/m3When, 500~1000mg/m3Exhaust gas enter A3Adsorption tower, through R2Normal-temperature deep purification reactor obtains 20mg/m3Purification gas with B1Air-introduced machine is discharged in atmosphere;
e.A1、A2Enter stand-by state, A after the completion of adsorption tower regeneration3After adsorption tower adsorption saturation, through R2Normal-temperature deep is net The VOCs concentration for changing reactor is greater than 20mg/m3When, A3Adsorption tower enters reproduced state, 500~1000mg/m3Exhaust gas enter A1Adsorption tower, obtained 20mg/m3Purification gas with B1Air-introduced machine is discharged in atmosphere.
In conclusion the VOCs exhaust gas advanced purification system structure of the utility model is simply closed by above-mentioned technical proposal Reason can effectively handle the organized or inorganization VOCs exhaust gas of industrial discharge, and treatment effect meets country or place regulation The discharge standard of related VOCs exhaust gas.
It should be appreciated that the above is only the preferred embodiment of the utility model, for the common skill of the art For art personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these change It also should be regarded as the protection scope of the utility model into retouching.

Claims (8)

1. a kind of VOCs exhaust gas advanced purification system, it is characterised in that single including VOCs exhaust gas treatment unit and adsorption tower regeneration Member, the adsorption tower regeneration unit include more than two adsorbent equipments, low-temperature catalytic oxidation reaction unit and desorption apparatus, each The adsorbent equipment includes absorption and control mechanism and Regeneration control mechanism, and the VOCs exhaust gas treatment unit includes that normal-temperature deep is net Change reaction unit;
The adsorbent equipment is at least contact VOCs exhaust gas with adsorbent, to make at least partly VOCs in VOCs exhaust gas Organic matter is adsorbed by adsorbent, and obtains low concentration VOCs exhaust gas;
The gas vent of the adsorbent equipment is connected with the gas access of the normal-temperature deep purification reaction apparatus, the room temperature Deep purifying reaction unit is by 90% or more low concentration VOCs exhaust gas conversion at CO2And H2O;
The gas vent of each adsorbent equipment is also connected with the gas access of low-temperature catalytic oxidation reaction unit, described low High concentration VOCs exhaust gas of the warm catalytic oxidation reaction device at least to generate to regeneration carries out purified treatment, described low-temperature catalyzed The gas vent of oxidation reaction apparatus is connected by blower with the gas access of the desorption apparatus, each desorption apparatus Gas vent be connected with the gas access of the low-temperature catalytic oxidation reaction unit.
2. VOCs exhaust gas advanced purification system according to claim 1, it is characterised in that: each adsorbent equipment includes Ontology, and it is set to the intrinsic adsorbent, the adsorbent includes regenerable sorbent, the reproducing adsorbent packet Include active carbon and/or molecular sieve.
3. VOCs exhaust gas advanced purification system according to claim 1, it is characterised in that: the normal-temperature deep purification reaction Device includes O3Generating unit and catalyst filling unit.
4. VOCs exhaust gas advanced purification system according to claim 3, it is characterised in that: the O3Generating unit includes UV Pre-reactor, at least to make the O in low concentration VOCs exhaust gas2It is changed into O under the irradiation of ultraviolet light3, the ultraviolet light Wavelength is 100nm~400nm.
5. VOCs exhaust gas advanced purification system according to claim 3, it is characterised in that: in the catalyst filling unit The first catalyst include O composite metallic oxide catalyst using active carbon as carrier, composition metal in first catalyst The load capacity of oxide is 0.1~5wt%, and first catalyst is Regenrable catalyzed, and the Regenrable catalyzed is again The raw period is 3~June, the reproduction time is 8~for 24 hours.
6. VOCs exhaust gas advanced purification system according to claim 1, it is characterised in that: the normal-temperature deep purification reaction The gas vent of device is connected with the gas access of blower unit, and the gas vent of the blower unit is connected with atmosphere.
7. VOCs exhaust gas advanced purification system according to claim 6, it is characterised in that: the low-temperature catalytic oxidation reaction The second catalyst for including in device includes with Al2O3For Pt the and/or Pd catalyst of carrier, Pt in second catalyst And/or the load capacity of Pd is 0.1~10wt%.
8. VOCs exhaust gas advanced purification system described in any one of -7 according to claim 1, it is characterised in that: the desorption dress It sets and is also connected with an air compensation device, the air compensation device is connected with atmosphere, at least to make fresh air enter adsorption tower Regeneration unit.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109821408A (en) * 2019-03-12 2019-05-31 上海第二工业大学 A kind of device and method of ozone-catalysis oxidation collaboration processing volatile organic matter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109821408A (en) * 2019-03-12 2019-05-31 上海第二工业大学 A kind of device and method of ozone-catalysis oxidation collaboration processing volatile organic matter
CN109821408B (en) * 2019-03-12 2021-10-19 上海第二工业大学 Device and method for cooperatively treating volatile organic compounds through ozone-catalytic oxidation

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Assignee: Suzhou maiwo Ruixin Environmental Protection Technology Co., Ltd

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Denomination of utility model: A deep purification system for VOCs

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Address before: 215000 Anmin Road, Huangdao Town, Xiangcheng District, Suzhou City, Jiangsu Province

Patentee before: SUZHOU MOEWE ENVIRONMENTAL ENGINEERING Co.,Ltd.