CN107486003B - A kind of processing method removing benzene homologues in petrochemical industry exhaust gas - Google Patents

A kind of processing method removing benzene homologues in petrochemical industry exhaust gas Download PDF

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CN107486003B
CN107486003B CN201710929272.3A CN201710929272A CN107486003B CN 107486003 B CN107486003 B CN 107486003B CN 201710929272 A CN201710929272 A CN 201710929272A CN 107486003 B CN107486003 B CN 107486003B
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gas
exhaust gas
benzene homologues
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ozone
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CN107486003A (en
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缪琼华
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Foshan Teng Teng Environmental Protection Technology Co., Ltd.
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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
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
    • 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
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • 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
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • 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
    • B01D53/75—Multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/104—Ozone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • B01D2252/103—Water
    • 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
    • B01D2257/702—Hydrocarbons
    • B01D2257/7027—Aromatic hydrocarbons
    • 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
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

Abstract

The invention discloses a kind of processing method of benzene homologues in removal petrochemical industry exhaust gas, exhaust gas passes sequentially through residual-heat exchanger, gas superheat protective device, thermal type gas quality flow meter, mixed gas flow regulating valve, fiber bag precipitator, tungsten wire circle surface active ozone Oxidation Treatment device, gas fume washing purifying column, air-introduced machine and is handled.Ozone surface active characteristic specific to certain metal simple-substance surfaces is utilized in the invention, when tungsten wire coil is in the state that energization is red-hot, ozone can discharge rapidly out activation oxygen atom on its surface, a kind of Strong oxdiative environment can be generated in tungsten metal surface, when the molecule containing conjugation C C keys such as benzene homologues is under such Strong oxdiative environment, its conjugation C C key can be activated oxygen atom and break, and benzene homologues molecule is finally H by oxygenolysis2O and CO2Equal inorganic molecules, to achieve the purpose that benzene homologues in removing exhaust gas.

Description

A kind of processing method removing benzene homologues in petrochemical industry exhaust gas
Technical field
The present invention relates to a kind of processing methods of benzene homologues in removal petrochemical industry exhaust gas, belong to the exhaust gas in environmental protection Process field.
Background technology
Benzene homologues are the general names of benzene and its derivative.Sensu lato benzene homologues include whole aromatic compounds, in the narrow sense Benzene homologues refer in particular to having containing for certain distribution and do harm to huamn body in human being's production living environment including BTEX Benzene ring compound.
The mankind can trace back to for 19th century earliest to the refinement acquisition of benzene homologues.1825, British scientist faraday （Faraday）With the benzene of method isolated higher degree from the thermal cracking product of the similar substances such as fish oil of distillation, claim it For " the heavy carbon compound of hydrogen ", and determine its basic physical property and chemical composition.Hereafter and it is found that toluene, diformazan in succession The substances such as benzene, and Uniform Name is benzene homologues.The industrial production of benzene homologues starts from 1865, is recycled from coal tar.With The expansion of its purposes, yield constantly rises, and has become one of ten large tonnage product of the world to nineteen thirty.With benzene homologues Production and application, polluting property and toxicologic study to air gradually attract attention extensively, 70 years last century Before and after generation, the monitoring and research of the object pollution of benzene in air system are increasingly becoming hot spot.
Benzene homologues have serious negative effect to region especially city atmospheric environment.Due to most benzene homologues（As benzene, Toluene etc.）With stronger volatility, it is easy to evaporate into gas under normal temperature condition and forms volatile organic gases （VOCs）, VOCs gaseous contaminations can be caused.For example BTEX is widely used in oil as the organic solvent being industrially commonly used The industries such as paint, degreasing, dry-cleaning, printing, weaving, synthetic rubber.It can be due to waving during the production of BTEX, storage and transportation and use It sends out and causes atmosphere pollution.Photochemical reaction activity is higher in an atmosphere by BTEX, to photooxidant in air（Such as ozone and peroxide Acetyl group nitrate etc.）Formation with secondary organic aerosol has suitable effect.
Mainly there are two kinds of stationary source and moving source in the source of benzene homologues pollution.Moving source mainly has automobile, steamer and aircraft Deng using oil product as the discharge gas of the vehicles of fuel；The type of stationary source is extremely more, predominantly petrochemical process process Effluent with storage facilities etc. and the various occasions using organic solvent, such as spray painting, printing, metal degreasing and degreasing, bonding Agent, pharmacy, plastics, coating and rubber processing etc..
According to the technological process of production and the difference of the discharging modes of exhaust gas, benzene homologues have different control technologies.At present It is widely used and study and more have：Absorption method, heat damage method, condensation method, absorption process etc., the new control developed in recent years Technology processed includes：Biofilm, light decomposition method, plasma decomposition, ozone decomposed method etc..
（1）Absorption method：
With porous solid treatment fluid mixture, one or more of components contained therein is made to be enriched in the surface of solids, And the process detached with other components is known as adsorbing.Absorption method is mainly used for the purification of low concentration high throughput benzene homologues.
（2）Heat damage method：
Heat damage method is current application than benzene homologues administering method wide, that research is more, low especially suitable for containing The exhaust gas of concentration benzene series matter.This method can be divided into direct flame combustion and catalysis is burnt, and process is complicated and may include one Series of decomposition, polymerization and radical reaction.And most important benzene homologues heat damage method mechanism includes oxidation, thermal cracking and heat point Solution, heat damage method are based on the progress of this mechanism.
（3）Condensation method：
Condensation method is that have this property of different saturated vapor pressures at different temperatures using substance, using reduction system temperature Degree improves system pressure, the process for making the benzene homologues in steam condition condense and being separated from exhaust gas.
（4）Absorption process：
The characteristics of absorption process can mainly be dissolved each other using benzene homologues with most of oily substance, with higher boiling, low-steam pressure Oils absorbs the benzene homologues in exhaust gas as absorbent, and common absorber is padding washing absorption tower.
（5）Biofilm：
Microorganism is exactly fixedly attached to porous medium filler surface by so-called biofilm, and polluted gas is made to fill out Biological treatment is carried out in material bed, can be by contaminant removal therein, and be allowed to degrade in gap.Volatile organic contaminant It is attracted to apparent gap, is consumed by the Institute of Micro-biology in gap, and be degraded into CO2、H2O and neutral salt.
Currently, the exhaust gas benzene series substance treating method that China generally uses, generally existing initial investment is big, operation and maintenance cost The shortcomings of height, technical sophistication, and its treatment effect is also difficult to meet increasingly strict emission request.For this reason, it may be necessary to find new Method and approach solve this problem.
Invention content
In order to solve many deficiencies in the prior art, the present invention provides benzene homologues in a kind of removal petrochemical industry exhaust gas Processing method, the petrochemical industry exhaust gas containing benzene homologues enters residual-heat exchanger by gas piping, passes through heat exchange herein The after-heat for making the exhaust gas of overheat be cooled down and be stablized, and obtaining is acted on for utilizing, the outlet of residual-heat exchanger is logical Gas piping connection gas superheat protective device is crossed, effect is when residual-heat exchanger failure or the exhaust gas temperature after heat exchange When still excessively high, can temporarily disconnected gas circuit, play the role of protecting back-end processing device, the outlet of gas superheat protective device logical Gas piping connection thermal type gas quality flow meter is crossed, real time monitoring record, hot type can be carried out to information such as exhaust gas flow, flow velocitys The outlet of gas mass flow gauge connects mixed gas flow regulating valve by gas piping, is adjusted by the method for importing air The actual concentrations of benzene homologues in exhaust gas, and accurate dilution cooling is carried out to exhaust gas, the outlet of mixed gas flow regulating valve is logical Gas piping connection fiber bag precipitator is crossed, the particulate pollutant in exhaust gas is removed at this, prevents from wearing or blocking back-end processing The outlet of device, fiber bag precipitator connects tungsten wire circle surface active-ozone Oxidation Treatment device, tungsten wire circle by gas piping The outlet of surface active-ozone Oxidation Treatment device connects gas fume washing purifying column by gas piping, at this to treated Exhaust gas carries out further water washing cleaning and cooling, and the outlet of gas fume washing purifying column connects air-introduced machine by gas piping, draws The outlet of wind turbine is connected to atmospheric environment by gas piping.
Wherein, tungsten wire circle surface active-ozone Oxidation Treatment device is by gas pre-mixed area and oxidation reaction zone two parts group At bottom of device is equipped with air intake valve, and air intake valve rear end is connected to ultra-fine strainer by gas piping, and ultra-fine strainer rear end is by gas Body piping connection to gas pre-mixed four-way valve, meanwhile, ozone generator and nitrogen storage tank are also connected to gas by gas piping respectively Body premixes four-way valve, and gas pre-mixed four-way valve outlet end is connected to mixed gas nozzle by gas piping, on mixed gas nozzle Side is equipped with 1 set of metal tungsten wire circle, and metal tungsten wire circle is powered by 1 regulated power supply outside device, at the top of device Equipped with drain tap；Petrochemical industry exhaust gas containing benzene homologues passes through tungsten wire circle surface active-ozone Oxidation Treatment bottom of device Air intake valve enter inside processing unit, after the fine filtering of ultra-fine strainer thoroughly removes granule foreign, into gas Four-way valve is premixed, meanwhile, the ozone gas generated by ozone generator and the nitrogen supplied by nitrogen storage tank are also into gas Four-way valve is premixed, pending exhaust gas, ozone and nitrogen are in gas pre-mixed four-way valve according to the volume ratio being previously set（It is useless Gas, O3、N2Ratio be respectively 28.7%, 31.1% and 40.2%）It is sufficiently mixed, gas after mixing is sprayed by mixed gas For head uniformly at injection to metal tungsten wire circle, metal tungsten wire circle enters the red-hot state that is powered under the power supply of regulated power supply, at this point, mixed The ozone closed in gas discharges rapidly out activation oxygen atom in tungsten coil surface, and is locally generating a kind of Strong oxdiative ring Border is conjugated C-C key meetings when the benzene homologues molecule containing conjugation C-C keys in exhaust gas is under such Strong oxdiative environment It is activated oxygen atom to break, benzene homologues molecule is finally H by oxygenolysis2O and CO2Equal inorganic molecules, to reach removing exhaust gas The purpose of middle benzene homologues, the exhaust gas after purified treatment is discharged by the drain tap at the top of device, and enters next processing work Sequence.Wherein, since benzene homologues are combustible, and ozone can form combustion adjuvant after discharging oxygen atom --- and oxygen, the two are mixed There is the danger exploded after conjunction, therefore be mixed into nitrogen as shielding gas into exhaust gas in advance, explosion-proof can be played.
Wherein, the working pressure range of tungsten wire circle surface active-ozone Oxidation Treatment device is 0.055 ~ 0.75MPa, work It is 250 ~ 700 DEG C to make temperature range, dischargeable capacity 230m3。
Wherein, tungsten wire circle surface active-ozone Oxidation Treatment device, the surface temperature of metal tungsten wire circle at work are about 2600 DEG C, operating voltage 380V, W content is more than 99.95%.
Wherein, tungsten wire circle surface active-ozone Oxidation Treatment device, gas pre-mixed four-way valve go out knot using three into one Structure, maximum pressure-bearing are 1.05MPa, and operating temperature range is 105 ~ 850 DEG C.
By this method treated exhaust gas, the removal efficiency of benzene homologues is up to 99.6%.
The advantage of the invention is that：
（1）The present invention has broken away from the governance model of benzene homologues in existing petrochemical industry exhaust gas, and creative being utilized is smelly Oxygen surface active characteristic specific to certain metal simple-substance surfaces, when tungsten wire coil be in be powered it is red-hot in the state of, it is smelly Oxygen can discharge rapidly out activation oxygen atom on its surface, a kind of Strong oxdiative environment can be generated in tungsten metal surface, when such as benzene series When the molecule containing conjugation C-C keys such as object is under such Strong oxdiative environment, conjugation C-C keys can be activated oxygen atom and beat It is broken, and be finally H by oxygenolysis2O and CO2Equal inorganic molecules.This method has preferable oxygenolysis effect to benzene homologues, is It is a kind of that very targetedly processing method, treatment effeciency can reach 98.9%.
（2）The present invention does not use any chemical agent in the process of running, on the one hand greatly reduces and purchases processing material On the other hand generated cost has also prevented the risk for introducing the pollutant for endangering bigger.
（3）Invention applies multiple gases pre-mixed technologies, can realize the advance uniform mixing of reaction mass, significantly The reaction efficiency of raising.
（4）Since benzene homologues are combustible, and ozone can form combustion adjuvant after discharging oxygen atom --- oxygen, the two There is the danger exploded after mixing.For this purpose, this system has especially used nitrogen as shroud gas, explosion wind can be effectively excluded Danger.
（5）The technology of the present invention route 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.
Description of the drawings
Fig. 1 is the equipment schematic diagram of the present invention.
In figure：1- residual-heat exchangers, 2- gas superheats protective device, 3- thermal type gas quality flow meters, 4- mixed gas Flow control valve, 5- fiber bag precipitators, 6- tungsten wire circles surface active-ozone Oxidation Treatment device, 7- gas fume washings purifying column, 8- air-introduced machines
Fig. 2 is the schematic diagram of tungsten wire circle surface active-ozone Oxidation Treatment device.
The ultra-fine strainer of 61- air intake valves, 62-, the gas pre-mixed four-way valves of 63-, 64- ozone generators, 65- nitrogen storage tanks, 66- mixed gas nozzle, 67- metals tungsten wire circle, 68- regulated power supplies, 69- drain taps.
Specific implementation mode
As shown in Figure 1, removing the processing method of benzene homologues in petrochemical industry exhaust gas, the petrochemical industry exhaust gas containing benzene homologues Enter residual-heat exchanger 1 by gas piping, passing through heat exchange action herein makes the exhaust gas of overheat be cooled down and be stablized, and For obtained after-heat for utilizing, the outlet of residual-heat exchanger 1 connects gas superheat protective device 2 by gas piping, Effect be 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 guarantor The effect of back-end processing device is protected, the outlet of gas superheat protective device 2 connects thermal type gas quality flow by gas piping Meter 3, can carry out the information such as exhaust gas flow, flow velocity real time monitoring record, the outlet of thermal type gas quality flow meter 3 passes through gas Piping connection mixed gas flow regulating valve 4 adjusts the actual concentrations of benzene homologues in exhaust gas by the method for importing air, and right Exhaust gas carries out accurate dilution cooling, and the outlet of mixed gas flow regulating valve 4 connects fiber bag precipitator by gas piping 5, the particulate pollutant in exhaust gas is removed at this, prevents from wearing or blocking back-end processing device, the outlet of fiber bag precipitator 5 is logical Cross gas piping connection tungsten wire circle surface active-ozone Oxidation Treatment device 6, tungsten wire circle surface active-ozone Oxidation Treatment dress The outlet for setting 6 connects gas fume washing purifying column 7 by gas piping, and at this, to treated, the further water of exhaust gas progress is cleaned Change and cooling, the outlet of gas fume washing purifying column 7 connects air-introduced machine 8 by gas piping, and the outlet of air-introduced machine 8 passes through flue Road is connected to atmospheric environment；Wherein, tungsten wire circle surface active-ozone Oxidation Treatment device 6 is by gas pre-mixed area and oxidation reaction zone Two parts form, and bottom of device is equipped with air intake valve 61, and 61 rear end of air intake valve is connected to ultra-fine strainer 62 by gas piping, surpass 62 rear end of fie screen is connected to gas pre-mixed four-way valve 63 by gas piping, meanwhile, ozone generator 64 and nitrogen storage tank 65 Gas pre-mixed four-way valve 63 is connected to by gas piping respectively, 63 outlet end of gas pre-mixed four-way valve is connected to mixed by gas piping Gas tip 66 is closed, 66 top of mixed gas nozzle is equipped with 1 set of metal tungsten wire circle 67, and metal tungsten wire circle 67 is by being located at outside device 1 regulated power supply 68 in portion is powered, and drain tap 69 is equipped at the top of device；Petrochemical industry exhaust gas containing benzene homologues passes through The air intake valve 61 of tungsten wire circle surface active -6 bottom of ozone Oxidation Treatment device enters inside processing unit, by ultra-fine strainer After 62 fine filtering thoroughly removes granule foreign, into gas pre-mixed four-way valve 63, meanwhile, it is generated by ozone generator 64 Ozone gas and the nitrogen supplied by nitrogen storage tank 65 also enter gas pre-mixed four-way valve 63, pending exhaust gas, ozone and nitrogen Gas is in gas pre-mixed four-way valve 63 according to the volume ratio being previously set（Exhaust gas, O3、N2Ratio be respectively 28.7%, 31.1% and 40.2%）It is sufficiently mixed, gas after mixing is uniformly sprayed by mixed gas nozzle 66 to metal tungsten wire circle At 67, metal tungsten wire circle 67 enters the red-hot state that is powered under the power supply of regulated power supply 68, at this point, the ozone in mixed gas exists 67 surface of metal tungsten wire circle discharges rapidly out activation oxygen atom, and is locally generating a kind of Strong oxdiative environment, when containing in exhaust gas When the benzene homologues molecule of conjugation C-C keys is under such Strong oxdiative environment, conjugation C-C keys can be activated oxygen atom and beat Broken, benzene homologues molecule is finally H by oxygenolysis2O and CO2Equal inorganic molecules, to reach the mesh of benzene homologues in removing exhaust gas , the exhaust gas after purified treatment is discharged by the drain tap 69 at the top of device, and enters next treatment process.Wherein, by It is combustible in benzene homologues, and ozone can form combustion adjuvant after discharge oxygen atom --- oxygen, the two have generation after mixing The danger of explosion, therefore nitrogen is mixed into as shielding gas into exhaust gas in advance, explosion-proof can be played；Wherein, tungsten wire circle table The working pressure range of face activation-ozone Oxidation Treatment device 6 is 0.055 ~ 0.75MPa, and operating temperature range is 250 ~ 700 DEG C, dischargeable capacity 230m3；Wherein, tungsten wire circle surface active-ozone Oxidation Treatment device 6, metal tungsten wire circle 67 are working When surface temperature be about 2600 DEG C, operating voltage 380V, W content be more than 99.95%；Wherein, tungsten wire circle surface active- Ozone Oxidation Treatment device 6, gas pre-mixed four-way valve 63 go out structure using three into one, and maximum pressure-bearing is 1.05MPa, work temperature Ranging from 105 ~ 850 DEG C of degree.
By this method treated exhaust gas, the removal efficiency of benzene homologues is up to 99.6%.

Claims (1)

1. the processing method of benzene homologues in a kind of removal petrochemical industry exhaust gas, which is characterized in that the petrochemical industry containing benzene homologues Exhaust gas enters residual-heat exchanger by gas piping, and passing through heat exchange action herein makes the exhaust gas of overheat be cooled down and be stablized, And obtained after-heat, for utilizing, the outlet of residual-heat exchanger connects gas superheat protective device by gas piping, The outlet of gas superheat protective device connects thermal type gas quality flow meter by gas piping, is carried out to exhaust gas flow, flow velocity The outlet of real time monitoring record, thermal type gas quality flow meter connects mixed gas flow regulating valve by gas piping, passes through The actual concentrations of benzene homologues in the method adjustment exhaust gas of air are imported, and accurate dilution cooling, mixed gas are carried out to exhaust gas The outlet of flow control valve connects fiber bag precipitator by gas piping, and the particulate pollutant in exhaust gas, cloth bag are removed at this The outlet of formula deduster connects tungsten wire circle surface active-ozone Oxidation Treatment device, the stone containing benzene homologues by gas piping Chemical industry exhaust gas is entered by the air intake valve of tungsten wire circle surface active-ozone Oxidation Treatment bottom of device inside processing unit, After the fine filtering of ultra-fine strainer thoroughly removes granule foreign, into gas pre-mixed four-way valve, while by ozone generator The ozone gas of generation and by nitrogen storage tank supply nitrogen also enter gas pre-mixed four-way valve, pending exhaust gas, ozone and Nitrogen is sufficiently mixed in gas pre-mixed four-way valve according to the volume ratio being previously set, and gas after mixing passes through mixed It closes gas tip uniformly to spray to metal tungsten wire circle, metal tungsten wire circle enters the red-hot shape that is powered under the power supply of regulated power supply State, the ozone in mixed gas discharges rapidly out activation oxygen atom in tungsten coil surface at this time, and is locally generating one kind Strong oxdiative environment, when the benzene homologues molecule containing conjugation C-C keys in exhaust gas is under such Strong oxdiative environment, conjugation C-C keys can be activated oxygen atom and break, and benzene homologues molecule is finally H by oxygenolysis2O and CO2, to reach in removing exhaust gas The purpose of benzene homologues goes the exhaust gas of the benzene homologues in removing exhaust gas to be discharged by the drain tap at the top of device after purified treatment, Gas fume washing purifying column is connected by gas piping, at this, to treated, exhaust gas carries out further water washing cleaning and cooling, The outlet of gas fume washing purifying column connects air-introduced machine by gas piping, and the outlet of air-introduced machine is connected to big compression ring by gas piping Border；The gas pre-mixed four-way valve of tungsten wire circle surface active-ozone Oxidation Treatment device goes out structure using three into one, and maximum pressure-bearing is 1.05MPa, operating temperature range are 105 ~ 850 DEG C, the working pressure range of tungsten wire circle surface active-ozone Oxidation Treatment device For 0.055 ~ 0.75MPa, operating temperature range is 250 ~ 700 DEG C, dischargeable capacity 230m3。
CN201710929272.3A 2016-07-15 2016-07-15 A kind of processing method removing benzene homologues in petrochemical industry exhaust gas Active CN107486003B (en)

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CN201610555323.6A CN105944494B (en) 2016-07-15 2016-07-15 A kind of processing method for removing benzene homologues in petrochemical industry waste gas
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