CN107854995B - A kind of VOCs purification system of petrochemical industry exhaust gas - Google Patents

A kind of VOCs purification system of petrochemical industry exhaust gas Download PDF

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CN107854995B
CN107854995B CN201711271626.6A CN201711271626A CN107854995B CN 107854995 B CN107854995 B CN 107854995B CN 201711271626 A CN201711271626 A CN 201711271626A CN 107854995 B CN107854995 B CN 107854995B
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gas
reactor
pulsed
vocs
exhaust gas
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CN107854995A (en
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项敬来
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Yongchun County Product Quality Inspection Institute Fujian fragrance product quality inspection center, national incense burning product quality supervision and Inspection Center (Fujian)
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项敬来
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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
    • B01D53/002—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 condensation
    • 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
    • B01D53/84—Biological processes
    • B01D53/85—Biological processes with gas-solid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • 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
    • 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
    • B01D53/007—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 irradiation
    • 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
    • B01D53/14—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 absorption
    • 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
    • B01D53/38—Removing components of undefined structure
    • B01D53/44—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
    • B01D53/84—Biological processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/95—Specific microorganisms
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/804—UV light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention discloses a kind of VOCs purification system of petrochemical industry exhaust gas, which includes residual-heat exchanger, gas superheat protective device, thermal type gas quality flow meter, mixed gas flow regulating valve, fiber bag precipitator, pulsed UV activation-microbial degradation reactor, gas fume washing purifying column, air-introduced machine.Verticillium lecanii KM9083 bacterial strain is utilized to the adaptability and its bioactivity degradation of higher concentration VOCs in this system creativeness, and the VOCs ingredient in exhaust gas is finally decomposed to H2O and CO2, the purified treatment requirement of industrial waste gas can be met to the biodegradable efficiency of VOCs.Meanwhile using Benzophenone-hexamethylphosphoramide combination ultra-violet radiation resisting protective action, which is added in advance in Verticillium lecanii KM9083 bacterial strain, ultraviolet light can be effectively prevent to act on the biological inhibition of above-mentioned bacterial strains.

Description

A kind of VOCs purification system of petrochemical industry exhaust gas
Technical field
The present invention relates to a kind of VOCs purification system of petrochemical industry exhaust gas, belong to the exhaust-gas treatment neck in environmental protection Domain.
Background technique
VOCs is the english abbreviation of volatile organic compounds (volatile organic compounds).Typically VOCs emission source can be divided into anthropogenic discharge source (including stationary source and moving source) and natural emission source (including biological source with it is abiotic Source) two classes, wherein taking human as based on emission source, mostly for the production process of petrochemical industry related industry, product consumption behavior with And motor-vehicle tail-gas causes.The complicated component of VOCs, big to the harm of human body, possessed special odor can lead to the kind of human body Kind sense of discomfort, and there is toxicity and irritation.Known many VOCs have neurotoxicity, kidney and hepatotoxicity, or even have Carcinogenesis can damage blood constituent and cardiovascular system, cause gastrointestinal disturbance, induce immune system, endocrine system and Disease of hematopoietic system causes metabolic deficiency.A variety of VOCs can act on human body simultaneously in air, generate cumulative effect, harm Degree greatly increases.
Traditional VOCs control technology is basically divided into two major classes: recovery technology and destruction technology.Recovery technology is basis The property of VOCs itself under certain temperature and pressure, uses absorption and sorption agent and selectively penetrating by physical method Film etc. realizes the separation of VOCs, mainly includes absorption process, absorption method, condensation method and membrane separation process.And destroying technology then is to use Chemistry or biological method, make VOCs gas molecule be changed into the water and carbon dioxide of small molecule, mainly include combustion method and biology Method.
(1) absorption process: the method for absorption process purifying VOCs is that mixed gas is handled using stripping liquid, in mixed gas One or more of gas components be dissolved in liquid, or in absorbing liquid component occur selection chemical reaction, remove it The process of middle one or more gas, to reach a kind of method of control atmosphere pollution.The method is suitable for atm number, medium The processing of the exhaust gas containing VOCs of concentration.
(3) absorption method: absorption method is to handle the gaseous mixture containing VOCs using porous solid adsorbent, utilizes solid The unbalanced chemical bond force or molecular attraction on surface, concentrate in one such or various ingredients on the surface of solids, to reach To isolated purpose.The active charcoal of common adsorbent, activated carbon fibre, activated alumina, molecular sieve and zeolite etc..
(3) combustion method: VOCs is converted to by combustion method that carbon dioxide, water and hydrogen chloride etc. is nontoxic or small toxicity Inorganic matter process, referred to as burning the method for purification, chemical action be mainly under combustion oxidation and high temperature thermal decomposition effect.This Method is suitable for administering pernicious gas that is flammable or can decomposing in the case of a high temperature.The advantages of combustion method be removal rate compared with Height, generally 95% or more；The disadvantage is that directly combustion method is easy to happen explosion, wastes thermal energy and be also easy to produce secondary pollution, heating power combustion Burning method operating cost is higher.
(4) condensation method: condensation method is that have different saturated vapor pressures under different temperature and pressures using VOCs, is led to It crosses reduction temperature and increases pressure, condense out the pollutant in steam condition, it is made to be purified and recycle.This method Advantage is that apparatus and process is simple, and low energy consumption, and useful component can be recycled；The disadvantage is that be not suitable for handling the organic gas of low concentration, it is right Entrance VOCs is required strictly, and when cooling temperature is lower, power consumption is larger.
(5) bioanalysis: bioanalysis be under suitable environmental condition, will be in VOCs gas using the vital movement of microorganism Harmful substance be transformed into simple inorganic matter (CO2、H2) and the process of cellular material etc. O.Common Biochemical method VOCS's Method has: zinc cation method, biofiltration process and biological island.The advantages of bioanalysis is removal rate height, small investment, equipment letter Single, operating cost is low, and less formation secondary pollution has a wide range of application；The disadvantage is that microorganism is higher to environmental requirement, crushing compared with Greatly, capacity of resisting impact load is poor, and equipment volume is big, is not suitable for the removal of high halogen compounds.
(6) membrane separation process: membrane separation process is using under the promotion of pressure difference, and the rate of air penetrating film is different, thus The process that admixture of gas is separated.The advantages of membrane separation process is that selectivity is good, and adaptable, low energy consumption, no phase-state change, can Recycle useful component；The disadvantage is that investment is big, it is strong to the dependence of film；It is more demanding to the granule surface contral of film, membrane separation device behaviour It is required height.
Currently, the organic waste gas treatment method used both at home and abroad includes absorption and sorption, condensation, burning and biotechnology etc. Methods described above, but all there is the disadvantages of investment is big, the period is long, operating cost is high in it, and treatment effect is also difficult to meet Increasingly strict emission request.For this reason, it may be necessary to find new method and approach to solve this problem.
Summary of the invention
In order to solve problems existing in the prior art, VOCs is removed the present invention provides a kind of petrochemical industry exhaust gas Purification system, the system include residual-heat exchanger, gas superheat protective device, thermal type gas quality flow meter, mixed gas stream Adjustable valve, fiber bag precipitator, pulsed UV activation-microbial degradation reactor, gas fume washing purifying column, air-introduced machine；Its In, the petrochemical industry exhaust gas containing VOCs enters residual-heat exchanger by gas piping, makes to overheat by heat exchange action herein The exhaust gas after-heat that is cooled down and stablized, and obtained for utilizing, the outlet of residual-heat exchanger passes through gas piping Gas superheat protective device is connected, effect is that the exhaust gas temperature when residual-heat exchanger failure or after heat exchange is still excessively high When, can temporarily disconnected gas circuit, play the role of protect back-end processing device, the outlet of gas superheat protective device passes through flue Road connects thermal type gas quality flow meter, can carry out real time monitoring record, thermal type gas quality to information such as exhaust gas flow, flow velocitys The outlet of flowmeter connects mixed gas flow regulating valve by gas piping, is adjusted in exhaust gas by the method for importing air The actual concentrations of VOCs, and accurate dilution cooling is carried out to exhaust gas, the outlet of mixed gas flow regulating valve passes through flue Road connects fiber bag precipitator, removes the particulate pollutant in exhaust gas herein, prevents from wearing or blocking back-end processing device, cloth bag The outlet of formula deduster connects pulsed UV activation-microbial degradation reactor, pulsed UV activation-micro- life by gas piping The outlet of object degradation reaction device connects gas fume washing purifying column by gas piping, and at this, to treated, exhaust gas is carried out further Water washing cleaning and cooling, the outlet of gas fume washing cooling tower air-introduced machine is connected by gas piping, the outlet of air-introduced machine passes through Gas piping is connected to atmospheric environment；Wherein, pulsed UV activation-microbial degradation reactor is made of hard stainless steel, left Upper lateral part is equipped with air intake valve, and lower right side is equipped with drain tap, is respectively equipped with 1 pulsed on reactor arranged on left and right sides wall Ultraviolet lamp, reactor bottom are equipped with 1 driving motor, thereon 1 set of stainless steel hollow shaft of connection, in stainless steel hollow shaft Portion is filled with porous catheter, and porous catheter is connected with the pure cotton porous fibre item being fixed on outside stainless steel hollow shaft, Also, porous catheter is also connected with the bacterium solution slot for being installed on reactor head；Exhaust gas containing VOCs is purple by being located at pulse Outer activation-microbial degradation reactor upper left quarter air intake valve enters inside reactor, is now placed in reactor arranged on left and right sides Pulsed ultraviolet lamp on wall is opened, can be intermittent to radiate ultraviolet light to inside reactor with the working method of pulsed, Meanwhile being opened positioned at the driving motor of reactor bottom, drive the stainless steel hollow shaft for being located at reactor center centainly to turn Speed starts turning, and several pure cotton porous fibre items being fixed on stainless steel hollow shaft have been got rid of under the influence of centrifugal force, It is adequately contacted with the generation of inside reactor exhaust gas, the Verticillium lecanii KM9083 bacterial strain adhered on pure cotton porous fibre item is in arteries and veins It rushes under formula ultraviolet light irradiation activation and the effect of Benzophenone-hexamethylphosphoramide mixture ultraviolet protection, it may occur that high VOCs ingredient in exhaust gas is finally decomposed to H by the biological respiration of efficiency2O and CO2, after biodegradable purified treatment Exhaust gas by be located at pulsed UV activation-microbial degradation reactor right lower quadrant drain tap be discharged reactor, under One treatment process；
Wherein, it is installed in the bacterium solution slot of reactor head and stores Verticillium lecanii liquid and Benzophenone-hexamethyl phosphinylidyne The mixed solution of triamine mixture, meanwhile, porous catheter is filled with inside stainless steel hollow shaft, and be connected with bacterium solution slot, it can Above-mentioned mixed solution is conducted to each pure cotton porous fibre item by capillary conduction, reacts microbial degradation With lasting progress.
Its pulsed UV activation-microbial degradation reactor working pressure range is 0.03 ~ 0.70MPa, operating temperature Range is 20 ~ 42 DEG C, dischargeable capacity 260m3。
The operating voltage of its pulsed UV activation-microbial degradation reactor, pulsed ultraviolet lamp is 25V, and power is 45W, luminescent spectrum energy focus primarily upon at 340nm wavelength, and average life was up to 2000 hours.
Its pulsed UV activation-microbial degradation reactor, pure cotton porous fibre item are made of long-staple cotton, fibre length Greater than 33mm, line density is 7500 public branch or so, is strongly greater than 5.2cN.
By this system treated exhaust gas, the removal efficiency of VOCs is up to 99.8%.
The present invention has the advantages that
(1) this system gets rid of existing industrial waste gas VOCs governance model, and creative is utilized Verticillium lecanii liquid Adaptability and its bioactivity degradation to higher concentration VOCs, in the item that pulsed ultraviolet irradiation activation is used in combination Under part, above-mentioned bacterial strains can play highly efficient VOCs degradation, can meet industry to the biodegradable efficiency of VOCs The purified treatment requirement of exhaust gas.This method is a kind of very targeted processing method, and treatment effeciency can reach 98.8%.
(2) this system takes full advantage of Benzophenone and the ultra-violet radiation resisting protection of hexamethylphosphoramide mix reagent is made With it is added in bacterial strain in advance, ultraviolet light can be effectively prevent to act on the biological inhibitions of above-mentioned bacterial strains, thoroughly solve bacterium The technical problem that quasi-microorganism can not survive under ultraviolet light irradiation.
(3) this system uses pure cotton porous fibre as Strain Vector, on the one hand has good liquid conductive performance, Strain solution can be made to be uniformly distributed；On the other hand, the generation that can also prevent electrostatic has fundamentally prevented to be cremated by electrostatic Caused by VOCs gas burst danger.
(4) this system technology path is advanced, and occupation area of equipment is smaller, and treatment effect is good, operation expense It is very low, be conducive to promote and apply on a large scale.
Detailed description of the invention
Fig. 1 is equipment schematic diagram of the invention.
In figure: 1- residual-heat exchanger, 2- gas superheat protective device, 3- thermal type gas quality flow meter, 4- mixed gas Flow control valve, 5- fiber bag precipitator, 6- pulsed UV activation-microbial degradation reactor, 7- gas fume washing purifying column, 8- Air-introduced machine.
Fig. 2 is pulsed UV activation-microbial degradation reactor schematic diagram.
61- air intake valve, 62- pulsed ultraviolet lamp, 63- pure cotton porous fibre item, 64- stainless steel hollow shaft, 65- are more Hole catheter, 66- bacterium solution slot, 67- driving motor, 68- drain tap.
Specific embodiment
As shown in Figure 1, petrochemical industry exhaust gas removes VOCs purification system, which includes residual-heat exchanger 1, gas superheat Protective device 2, thermal type gas quality flow meter 3, mixed gas flow regulating valve 4, fiber bag precipitator 5, pulsed UV activation- Microbial degradation reactor 6, gas fume washing purifying column 7, air-introduced machine 8 etc.；Wherein, the petrochemical industry exhaust gas containing VOCs passes through gas Body pipeline enters residual-heat exchanger 1, so that the exhaust gas of overheat is cooled down and is stablized by heat exchange action herein, and obtain After-heat is for utilizing, and the outlet of residual-heat exchanger 1 connects gas superheat protective device 2 by gas piping, and effect is When 1 failure of residual-heat exchanger or the exhaust gas temperature after heat exchange remain unchanged excessively high, can temporarily disconnected gas circuit, play protection rear end The outlet of the effect of processing unit, gas superheat protective device 2 connects thermal type gas quality flow meter 3 by gas piping, can Real time monitoring record is carried out to information such as exhaust gas flow, flow velocitys, the outlet of thermal type gas quality flow meter 3 is connected by gas piping Mixed gas flow regulating valve 4 is connect, the actual concentrations of VOCs in exhaust gas are adjusted by the method for importing air, and carry out to exhaust gas Accurate dilution cooling, the outlet of mixed gas flow regulating valve 4 connect fiber bag precipitator 5 by gas piping, remove herein The particulate pollutant in exhaust gas is removed, prevents from wearing or blocking back-end processing device, the outlet of fiber bag precipitator 5 passes through flue Road connects pulsed UV activation-microbial degradation reactor 6, and the outlet of pulsed UV activation-microbial degradation reactor 6 passes through Gas piping connects gas fume washing purifying column 7, and at this, to treated, exhaust gas carries out further water washing cleaning and cooling, flue gas The outlet of washing cooling tower 7 connects air-introduced machine 8 by gas piping, and the outlet of air-introduced machine 8 is connected to big compression ring by gas piping Border；Wherein, pulsed UV activation-microbial degradation reactor 6 is made of hard stainless steel, and left upper portion is equipped with air intake valve 61, lower right side is equipped with drain tap 68, is respectively equipped with 1 pulsed ultraviolet lamp 62, reactor on reactor arranged on left and right sides wall Bottom is equipped with 1 driving motor 67, connects 1 set of stainless steel hollow shaft 64 thereon, fills inside stainless steel hollow shaft 64 There are porous catheter 65, porous catheter 65 and 63 phase of pure cotton porous fibre item being fixed on outside stainless steel hollow shaft 64 Even, also, porous catheter 65 is also connected with the bacterium solution slot 66 for being installed on reactor head；Exhaust gas containing VOCs is by being located at Pulsed UV activation -6 upper left quarter of microbial degradation reactor air intake valve 61 enters inside reactor, is now placed in reactor Pulsed ultraviolet lamp 62 on arranged on left and right sides wall is opened, can be intermittent to inside reactor with the working method of pulsed Ultraviolet light is radiated, meanwhile, the driving motor 67 positioned at reactor bottom is opened, and drives the stainless steel for being located at reactor center hollow Axis body 64 is started turning with certain revolving speed, and several pure cotton porous fibre items 63 being fixed on stainless steel hollow shaft 64 are being centrifuged It has been got rid of, has adequately been contacted with the generation of inside reactor exhaust gas, the lecanium adhered on pure cotton porous fibre item 63 under the action of power Verticillium dahliae acts in pulsed ultraviolet irradiation activation and Benzophenone-hexamethylphosphoramide mixture ultraviolet protection Under, it may occur that the VOCs ingredient in exhaust gas is finally decomposed to H by efficient biology respiration2O and CO2, dropped by biology Exhaust gas after solving purified treatment is by being located at pulsed UV activation -6 right lower quadrant of microbial degradation reactor 68 row of drain tap Reactor out, into next treatment process；Wherein, it is installed in the bacterium solution slot 66 of reactor head and stores Verticillium lecanii KM9083 bacterial strain and Benzophenone-hexamethylphosphoramide mixture mixed solution, meanwhile, it is filled inside stainless steel hollow shaft 64 There is porous catheter 65, and be connected with bacterium solution slot 66, can be conducted above-mentioned mixed solution to each by capillary conduction On pure cotton porous fibre item 63, microbial degradation reaction is made to be able to continue progress；Wherein, pulsed UV activation-microbial degradation The working pressure range of reactor 6 is 0.03 ~ 0.70MPa, and operating temperature range is 20 ~ 42 DEG C, dischargeable capacity 260m3；Its In, pulsed UV activation-microbial degradation reactor 6, the operating voltage of pulsed ultraviolet lamp 62 is 25V, power 45W, Its luminescent spectrum energy focuses primarily upon at 340nm wavelength, and average life was up to 2000 hours；Wherein, pulsed UV is living Change-microbial degradation reactor 6, pure cotton porous fibre item 63 are made of long-staple cotton, and fibre length is greater than 33mm, line density For 7500 public branch or so, strongly it is greater than 5.2cN.
By this system treated exhaust gas, the removal efficiency of VOCs is up to 99.8%.

Claims (3)

1. a kind of VOCs purification system of petrochemical industry exhaust gas, which is characterized in that the system includes residual-heat exchanger, gas superheat Protective device, thermal type gas quality flow meter, mixed gas flow regulating valve, fiber bag precipitator, pulsed UV activation-micro- life Object degradation reaction device, gas fume washing purifying column, air-introduced machine；Wherein, the petrochemical industry exhaust gas containing VOCs by gas piping into Enter residual-heat exchanger, the outlet of residual-heat exchanger connects gas superheat protective device, gas superheat protection dress by gas piping The outlet set connects thermal type gas quality flow meter by gas piping, and the outlet of thermal type gas quality flow meter passes through flue Road connects mixed gas flow regulating valve, and the outlet of mixed gas flow regulating valve connects cloth-sack-type dust removal by gas piping The outlet of device, fiber bag precipitator connects pulsed UV activation-microbial degradation reactor by gas piping, and pulsed UV is living The outlet of change-microbial degradation reactor connects gas fume washing purifying column, the outlet of gas fume washing purifying column by gas piping Air-introduced machine is connected by gas piping, the outlet of air-introduced machine is connected to atmospheric environment by gas piping；Wherein, pulsed UV is living Change-microbial degradation reactor left upper portion is equipped with air intake valve, and lower right side is equipped with drain tap, reactor arranged on left and right sides 1 pulsed ultraviolet lamp is respectively installed, reactor bottom is equipped with 1 driving motor, and it is hollow to connect 1 set of stainless steel thereon on wall Axis body, is filled with porous catheter inside stainless steel hollow shaft, porous catheter and is fixed on outside stainless steel hollow shaft Pure cotton porous fibre item be connected, and porous catheter is also connected with the bacterium solution slot for being installed on reactor head；
Exhaust gas containing VOCs is entered instead by being located at pulsed UV activation-microbial degradation reactor upper left quarter air intake valve It answers inside device, the pulsed ultraviolet lamp being now placed on reactor arranged on left and right sides wall is opened, can be with the work side of pulsed Formula, it is intermittent to radiate ultraviolet light to inside reactor, while the driving motor for being located at reactor bottom is opened, and is driven positioned at anti- The stainless steel hollow shaft in device center is answered to start turning with certain revolving speed, several pure cottons being fixed on stainless steel hollow shaft are more Hole ribbon has been got rid of under the influence of centrifugal force, is adequately contacted with the generation of inside reactor exhaust gas, pure cotton porous fibre item The Verticillium lecanii of upper attachment irradiates activation in pulsed ultraviolet and Benzophenone-hexamethylphosphoramide mixture is ultraviolet Under line protective action, it may occur that the VOCs ingredient in exhaust gas is finally decomposed to H by efficient biology respiration2O and CO2, Exhaust gas after biodegradable purified treatment is by being located at the exhaust of pulsed UV activation-microbial degradation reactor right lower quadrant Reactor is discharged in valve, into next treatment process；
It is installed in the bacterium solution slot of reactor head and stores Verticillium lecanii liquid and Benzophenone-hexamethylphosphoramide mixture Mixed solution, while porous catheter is filled with inside stainless steel hollow shaft, and be connected with bacterium solution slot, it is conducted and is made by capillary It is conducted with by above-mentioned mixed solution to each pure cotton porous fibre item, microbial degradation reaction is made to be able to continue progress；
The operating voltage of pulsed UV activation-microbial degradation reactor pulsed ultraviolet lamp is 25V, power 45W, hair Light spectral energy focuses primarily upon at 340nm wavelength, and average life was up to 2000 hours.
2. the VOCs purification system of petrochemical industry exhaust gas according to claim 1, which is characterized in that pulsed UV activation- The working pressure range of microbial degradation reactor is 0.03 ~ 0.70MPa, and operating temperature range is 20 ~ 42 DEG C, and dischargeable capacity is 260m3。
3. the VOCs purification system of petrochemical industry exhaust gas according to claim 1, which is characterized in that pulsed UV activation- The pure cotton porous fibre item of microbial degradation reactor is made of long-staple cotton, and fibre length is greater than 33mm, line density 7500 Public affairs branch, is strongly greater than 5.2cN.
CN201711271626.6A 2016-06-28 2016-06-28 A kind of VOCs purification system of petrochemical industry exhaust gas Active CN107854995B (en)

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