CN106110809B - A kind of processing system for removing benzene homologues in petrochemical industry waste gas - Google Patents

A kind of processing system for removing benzene homologues in petrochemical industry waste gas Download PDF

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CN106110809B
CN106110809B CN201610555324.0A CN201610555324A CN106110809B CN 106110809 B CN106110809 B CN 106110809B CN 201610555324 A CN201610555324 A CN 201610555324A CN 106110809 B CN106110809 B CN 106110809B
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gas
mixed
tungsten wire
wire circle
ozone
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CN201610555324.0A
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CN106110809A (en
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周云鹏
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广东吉之准检测有限公司
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0019Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/0023Filters, i.e. particle separators 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023Pockets filters, i.e. multiple bag filters mounted on a common frame
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of devices for separating particles from gases or vapours
    • B01D50/006Combinations of devices relating to groups B01D46/00 and B01D47/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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
    • B01D53/1493Selection of liquid materials for use as absorbents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/38Removing components of undefined structure
    • B01D53/44Organic components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/72Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/76Gas phase processes, e.g. by using aerosols
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/10Oxidants
    • B01D2251/104Ozone
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2252/00Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10Inorganic absorbents
    • B01D2252/103Water
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/70Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/702Hydrocarbons
    • B01D2257/7027Aromatic hydrocarbons
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/70Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708Volatile organic compounds V.O.C.'s
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

Abstract

The invention discloses a kind of processing system for removing benzene homologues in petrochemical industry waste gas, the system includes residual-heat exchanger, gas superheat protection 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 etc..The system creativeness make use of ozone in surface active characteristic specific to some metal simple-substance surfaces, when tungsten wire coil is in the state of energization is red-hot, ozone can discharge activation oxygen atom rapidly on its surface, a kind of Strong oxdiative environment can be produced in tungsten metal surface, when the molecule containing conjugation C C keys such as benzene homologues is under such a Strong oxdiative environment, its conjugation C C key can be activated oxygen atom and break, and benzene homologues molecule is finally oxidized and is decomposed into H2O and CO2Deng inorganic molecule, so as to reach the purpose of benzene homologues in removing exhaust gas.

Description

A kind of processing system for removing benzene homologues in petrochemical industry waste gas

Technical field

The present invention relates to a kind of processing system for removing benzene homologues in petrochemical industry waste gas, the waste gas belonged 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.

Refinement of the mankind to benzene homologues obtains can trace back to for 19th century earliest.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 toluene, diformazan and are found that in succession The materials such as benzene, and Uniform Name is benzene homologues.The industrial production of benzene homologues starts from 1865, is reclaimed from coal tar.With The expansion of its purposes, yield constantly rises, and has become one of large tonnage product of the world ten to nineteen thirty.With benzene homologues Production and application, its 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 thing pollution of benzene in air system are increasingly becoming focus.

Benzene homologues have serious negative effect to region particularly city atmospheric environment.Due to most benzene homologues(As benzene, Toluene etc.)With stronger volatility, it is easy to evaporate among gas under normal temperature condition and forms VOC (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.Can be due to waving during BTEX production, accumulating and use Send out and cause 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 the discharge gas using oil product as the vehicles of fuel;The species of stationary source is extremely more, predominantly petrochemical process process Effluent and the various occasions using organic solvent with storage facilities etc., 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 waste 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:Biomembrance process, 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 are made to be enriched in the surface of solids, And the process separated with other components is referred to as adsorbing.Absorption method is mainly used in the purification of low concentration high flux benzene homologues.

(2)Heat damage method:

Heat damage method is current applies than benzene homologues administering method wide, that research is more, especially suitable for containing low The waste gas of concentration benzene series matter.This method can be divided into direct flame combustion and catalysis is burnt, and its process is complicated and may be including 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 material, using reduction system temperature Degree improves system pressure, the process for condensing the benzene homologues in steam condition and being separated from waste 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 waste gas as absorbent, and common absorber is padding washing absorption tower.

(5)Biomembrance process:

Microorganism is exactly fixedly attached to porous medium filler surface by so-called biomembrance process, and is filling out dusty gas Biological treatment is carried out in material bed, can be by contaminant removal therein, and be allowed to degrade in space.Volatile organic contaminant Apparent gap is attracted to, is consumed by the Institute of Micro-biology in space, and be degraded into CO2、H2O and neutral salt.

At present, the waste 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.

The content of the invention

In order to solve many deficiencies of the prior art, the invention provides one kind to remove benzene homologues in petrochemical industry waste gas Processing system, the system include residual-heat exchanger, gas superheat protection device, thermal type gas quality flow meter, mixed gas Flow control valve, fiber bag precipitator, tungsten wire circle surface active-ozone Oxidation Treatment device, gas fume washing purifying column, air-introduced machine Deng;Wherein, the petrochemical industry waste gas containing benzene homologues enters residual-heat exchanger by gas piping, herein by heat exchange action The waste gas of overheat is set to be cooled and stably, and obtained after-heat is available for utilizing, and the outlet of residual-heat exchanger passes through gas Body pipeline connects gas superheat protection device, and its effect is when residual-heat exchanger failure or the EGT after heat exchange remain unchanged When too high, can temporarily disconnected gas circuit, play a part of protect back-end processing device, the outlet of gas superheat protection device passes through gas Body pipeline connects thermal type gas quality flow meter, can carry out real-time monitoring record, heating type gas to information such as exhaust gas flow, flow velocitys The outlet of mass flowmenter connects mixed gas flow regulating valve by gas piping, and waste gas is adjusted by the method for importing air The actual concentrations of middle benzene homologues, and accurate dilution cooling is carried out to waste gas, the outlet of mixed gas flow regulating valve passes through gas Body pipeline connects fiber bag precipitator, and the particulate pollutant in waste gas is removed at this, prevents from wearing or blocks back-end processing device, The outlet of fiber bag precipitator connects tungsten wire circle surface active-ozone Oxidation Treatment device, tungsten wire circle surface by gas piping The outlet of activation-ozone Oxidation Treatment device connects gas fume washing purifying column by gas piping, at this to the waste gas after processing Further water washing cleaning and cooling are carried out, the outlet of gas fume washing purifying column connects air-introduced machine, air-introduced machine by gas piping Outlet atmospheric environment is connected 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 composition, bottom of device are provided with air intake valve, and air intake valve rear end is connected to super by gas piping Fie screen, ultra-fine filter screen rear end are connected to gas pre-mixed four-way valve by gas piping, meanwhile, ozone generator and nitrogen storage tank Gas pre-mixed four-way valve is connected to by gas piping respectively, the gas pre-mixed four-way valve port of export is connected to gaseous mixture by gas piping Body shower nozzle, mixed gas shower nozzle top are provided with 1 set of metal tungsten wire circle, and metal tungsten wire circle is by 1 voltage stabilizing outside device Power supply is powered, and drain tap is provided with the top of device;Petrochemical industry waste gas containing benzene homologues by tungsten wire circle surface active- The air intake valve of ozone Oxidation Treatment bottom of device enters inside processing unit, is thoroughly removed by the fine filtering of ultra-fine filter screen After granule foreign, into gas pre-mixed four-way valve, meanwhile, supplied by the ozone gas of ozone generator generation and by nitrogen storage tank The nitrogen given also enters gas pre-mixed four-way valve, and pending waste gas, ozone and nitrogen are in gas pre-mixed four-way valve according to prior The volume ratio set(Waste gas, O3、N2Ratio be respectively 28.7%, 31.1% and 40.2%)It is sufficiently mixed, after being well mixed Gas by mixed gas shower nozzle, uniformly at metal tungsten wire circle, metal tungsten wire circle enters under the power supply of voltage-stabilized power supply for injection Be powered red-hot state, and now, the ozone in mixed gas discharges rapidly activation oxygen atom in tungsten coil surface, and in office Portion produces a kind of Strong oxdiative environment, when the benzene homologues molecule containing conjugation C-C keys in waste gas is in such a Strong oxdiative environment When lower, its conjugation C-C key can be activated oxygen atom and break, and benzene homologues molecule is finally oxidized and is decomposed into H2O and CO2Etc. inorganic point Son, so as to reach the purpose of benzene homologues in removing exhaust gas, the waste gas after purified treatment is arranged by the drain tap at the top of device Go out, and enter next treatment process.Wherein, because benzene homologues are combustible, and ozone can be formed after oxygen atom is discharged and helped Agent --- oxygen is fired, has the danger exploded after the two mixing, therefore be mixed into nitrogen as shielding gas, energy into waste gas in advance Enough play explosion-proof.

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, its W content is more than 99.95%.

Wherein, tungsten wire circle surface active-ozone Oxidation Treatment device, its gas pre-mixed four-way valve enter one using three and go out knot Structure, maximum pressure-bearing are 1.05MPa, and operating temperature range is 105 ~ 850 DEG C.

Waste gas after being handled by the system, the removal efficiency of its benzene homologues is up to 99.6%.

The advantage of the invention is that:

(1)The system has broken away from the governance model of benzene homologues in existing petrochemical industry waste gas, and creative make use of is smelly Oxygen in surface active characteristic specific to some 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 activation oxygen atom rapidly on its surface, a kind of Strong oxdiative environment can be produced in tungsten metal surface, when such as benzene series When the molecule containing conjugation C-C keys such as thing is under such a Strong oxdiative environment, its conjugation C-C key can be activated oxygen atom and beat It is broken, and be finally oxidized and be decomposed into H2O and CO2Deng inorganic molecule.This method has preferable oxidation Decomposition effect to benzene homologues, is It is a kind of that very targetedly processing method, its treatment effeciency can reach 98.9%.

(2)The system without using any chemical agent, on the one hand greatly reduces in the process of running and purchases processing material Caused cost, on the other hand also prevent to introduce the risk for endangering bigger pollutant.

(3)The system applies multiple gases pre-mixed technology, can realize the advance uniformly mixing of reaction mass, significantly The reaction efficiency of raising.

(4)Because benzene homologues are combustible, and ozone can form combustion adjuvant after oxygen atom is discharged --- oxygen, the two There is the danger exploded after mixing.Therefore, the system has especially used nitrogen effectively to exclude the wind that explodes as shroud gas Danger.

(5)The system technology path is advanced, and occupation area of equipment is smaller, and treatment effect is good, operation expense It is very low, be advantageous to a wide range of popularization and application.

Brief description of the drawings

Fig. 1 is the equipment schematic diagram of the present invention.

In figure:1- residual-heat exchangers, 2- gas superheats protection 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 filter screen 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 shower nozzle, 67- metals tungsten wire circle, 68- voltage-stabilized power supplies, 69- drain taps.

Embodiment

As shown in figure 1, removing the processing system of benzene homologues in petrochemical industry waste gas, the system includes residual-heat exchanger 1, gas Body overtemperature protection system 2, thermal type gas quality flow meter 3, mixed gas flow regulating valve 4, fiber bag precipitator 5, tungsten wire circle Surface active-ozone Oxidation Treatment device 6, gas fume washing purifying column 7, air-introduced machine 8 etc.;Wherein, the petrochemical industry work containing benzene homologues Industry waste gas enters residual-heat exchanger 1 by gas piping, the waste gas of overheat is obtained cooling and steady by heat exchange action herein It is fixed, and obtained after-heat is available for utilizing, and the outlet of residual-heat exchanger 1 connects gas superheat protection dress by gas piping Put 2, its act on be when the failure of residual-heat exchanger 1 or the EGT after heat exchange remain unchanged too high, can temporarily disconnected gas circuit, Play a part of protecting back-end processing device, the outlet of gas superheat protection device 2 connects heating type gas matter by gas piping Flowmeter 3 is measured, real-time monitoring record can be carried out to information such as exhaust gas flow, flow velocitys, the outlet of thermal type gas quality flow meter 3 leads to Gas piping connection mixed gas flow regulating valve 4 is crossed, the reality that the method by importing air adjusts benzene homologues in waste gas is dense Degree, and accurate dilution cooling is carried out to waste gas, the outlet of mixed gas flow regulating valve 4 connects cloth-bag type by gas piping Deduster 5, the particulate pollutant in waste gas is removed at this, prevents from wearing or blocks back-end processing device, fiber bag precipitator 5 Outlet connects tungsten wire circle surface active-ozone Oxidation Treatment device 6, tungsten wire circle surface active-ozone oxidation by gas piping The outlet of processing unit 6 connects gas fume washing purifying column 7 by gas piping, waste gas after processing is carried out at this further Water washing cleaning and cooling, the outlet of gas fume washing purifying column 7 connect air-introduced machine 8 by gas piping, and the outlet of air-introduced machine 8 passes through Gas piping connects 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 provided with air intake valve 61, and the rear end of air intake valve 61 is connected to ultra-fine filter by gas piping Net 62, the ultra-fine rear end of filter screen 62 are connected to gas pre-mixed four-way valve 63 by gas piping, meanwhile, ozone generator 64 and nitrogen storage Tank 65 is also connected to gas pre-mixed four-way valve 63 by gas piping respectively, and the gas pre-mixed port of export of four-way valve 63 is connected by gas piping Be connected to mixed gas shower nozzle 66, the top of mixed gas shower nozzle 66 is provided with 1 set of metal tungsten wire circle 67, metal tungsten wire circle 67 by positioned at 1 voltage-stabilized power supply 68 outside device is powered, and drain tap 69 is provided with the top of device;Petrochemical industry containing benzene homologues is given up Gas is entered inside processing unit by the air intake valve 61 of tungsten wire circle surface active-bottom of ozone Oxidation Treatment device 6, by super After the fine filtering of fie screen 62 thoroughly removes granule foreign, into gas pre-mixed four-way valve 63, meanwhile, by ozone generator 64 The ozone gas of generation and the nitrogen supplied by nitrogen storage tank 65 also enter gas pre-mixed four-way valve 63, pending waste gas, smelly Oxygen and nitrogen are in gas pre-mixed four-way valve 63 according to the volume ratio being previously set(Waste gas, O3、N2Ratio be respectively 28.7%th, 31.1% and 40.2%)It is sufficiently mixed, the gas after being well mixed uniformly is sprayed to metal by mixed gas shower nozzle 66 At tungsten wire circle 67, metal tungsten wire circle 67 enters the red-hot state that is powered under the power supply of voltage-stabilized power supply 68, now, in mixed gas Ozone discharges rapidly activation oxygen atom on the surface of metal tungsten wire circle 67, and is locally producing a kind of Strong oxdiative environment, works as waste gas In the benzene homologues molecule containing conjugation C-C keys when being under such a Strong oxdiative environment, it, which is conjugated C-C keys, can be activated oxygen original Son is broken, and benzene homologues molecule is finally oxidized and is decomposed into H2O and CO2Deng inorganic molecule, so as to reach benzene homologues in removing exhaust gas Purpose, the waste gas after purified treatment are discharged by the drain tap 69 at the top of device, and enter next treatment process.Wherein, Because benzene homologues are combustible, and ozone can form combustion adjuvant after oxygen atom is discharged --- oxygen, there is hair after the two mixing The danger of raw blast, therefore nitrogen is mixed into as shielding gas into waste gas in advance, explosion-proof can be played;Wherein, tungsten wire circle The working pressure range of surface active-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, its metal tungsten wire circle 67 are working When surface temperature be about 2600 DEG C, operating voltage 380V, its W content be more than 99.95%;Wherein, tungsten wire circle surface active- Ozone Oxidation Treatment device 6, its gas pre-mixed four-way valve 63 enter one using three and go out structure, and maximum pressure-bearing is 1.05MPa, work temperature It is 105 ~ 850 DEG C to spend scope.

Waste gas after being handled by the system, the removal efficiency of its benzene homologues is up to 99.6%.

Claims (6)

1. it is a kind of remove petrochemical industry waste gas in benzene homologues processing system, it is characterised in that the system include residual-heat exchanger, Gas superheat protection device, thermal type gas quality flow meter, mixed gas flow regulating valve, fiber bag precipitator, tungsten wire circle table Face activation-ozone Oxidation Treatment device, gas fume washing purifying column, air-introduced machine;Wherein, the petrochemical industry waste gas containing benzene homologues leads to Cross gas piping and enter residual-heat exchanger, the outlet of residual-heat exchanger connects gas superheat protection device, gas by gas piping The outlet of body overtemperature protection system connects thermal type gas quality flow meter by gas piping, and thermal type gas quality flow meter goes out Mouth connects mixed gas flow regulating valve by gas piping, and the outlet of mixed gas flow regulating valve is connected by gas piping Fiber bag precipitator, the outlet of fiber bag precipitator connect tungsten wire circle surface active-ozone Oxidation Treatment by gas piping and filled Put, the outlet of tungsten wire circle surface active-ozone Oxidation Treatment device connects gas fume washing purifying column, flue gas water by gas piping The outlet for washing purifying column connects air-introduced machine by gas piping, and the outlet of air-introduced machine connects atmospheric environment by gas piping;Its In, tungsten wire circle surface active-ozone Oxidation Treatment device is made up of gas pre-mixed area and oxidation reaction zone two parts, bottom of device Provided with air intake valve, air intake valve rear end is connected to ultra-fine filter screen by gas piping, and ultra-fine filter screen rear end is connected by gas piping To gas pre-mixed four-way valve, meanwhile, ozone generator and nitrogen storage tank are also connected to gas pre-mixed four-way by gas piping respectively Valve, the gas pre-mixed four-way valve port of export are connected to mixed gas shower nozzle by gas piping, 1 set are provided with above mixed gas shower nozzle Metal tungsten wire circle, metal tungsten wire circle are powered by 1 voltage-stabilized power supply outside device, and air bleeding valve is provided with the top of device Door.
A kind of 2. processing system for removing benzene homologues in petrochemical industry waste gas, it is characterised in that tungsten wire circle surface active-ozone oxygen Change processing unit to be made up of gas pre-mixed area and oxidation reaction zone two parts, including air intake valve, ultra-fine filter screen, gas pre-mixed four Port valve, ozone generator, nitrogen storage tank, mixed gas shower nozzle, metal tungsten wire circle, voltage-stabilized power supply, drain tap;Tungsten wire circle surface Activation-ozone Oxidation Treatment bottom of device is provided with air intake valve, and air intake valve rear end is connected to ultra-fine filter screen by gas piping, surpasses Fie screen rear end is connected to gas pre-mixed four-way valve, while ozone generator by gas piping(64)And nitrogen storage tank(65)Also divide Gas pre-mixed four-way valve is not connected to by gas piping, the gas pre-mixed four-way valve port of export is connected to oxidation reaction by gas piping Mixed gas shower nozzle in area, 1 set of metal tungsten wire circle, tungsten are installed above the internal mix gas tip of oxidation reaction zone Coil is by 1 voltage-stabilized power supply outside oxidation reaction zone(68)Powered, drain tap is provided with the top of device.
3. the processing system according to claim 1 for removing benzene homologues in petrochemical industry waste gas, it is characterised in that contain benzene It is that the petrochemical industry waste gas of thing enters processing by the air intake valve of tungsten wire circle surface active-ozone Oxidation Treatment bottom of device and filled Inside is put, after the fine filtering of ultra-fine filter screen thoroughly removes granule foreign, into gas pre-mixed four-way valve, while by ozone The ozone gas of generator generation and the nitrogen supplied by nitrogen storage tank also enter gas pre-mixed four-way valve, pending waste gas, Ozone and nitrogen are sufficiently mixed in gas pre-mixed four-way valve according to the volume ratio being previously set, the gas after being well mixed Uniformly sprayed by mixed gas shower nozzle to metal tungsten wire circle, it is vehement that metal tungsten wire circle enters energization under the power supply of voltage-stabilized power supply Warm status, now the ozone in mixed gas discharge activation oxygen atom rapidly in tungsten coil surface, and in local generation A kind of Strong oxdiative environment, when the benzene homologues molecule containing conjugation C-C keys in waste gas is under such a Strong oxdiative environment, its Conjugation C-C keys can be activated oxygen atom and break, and benzene homologues molecule is finally oxidized and is decomposed into H2O and CO2, given up so as to reach to remove The purpose of benzene homologues in gas, the waste gas after purified treatment is discharged by the drain tap at the top of device, and enters next processing Process.
4. the processing system according to claim 1 for removing benzene homologues in petrochemical industry waste gas, it is characterised in that tungsten wire circle The working pressure range of surface active-ozone Oxidation Treatment device is 0.055 ~ 0.75MPa, and operating temperature range is 250 ~ 700 DEG C, dischargeable capacity 230m3
5. the processing system according to claim 1 for removing benzene homologues in petrochemical industry waste gas, it is characterised in that tungsten wire circle The surface temperature of the metal tungsten wire circle of surface active-ozone Oxidation Treatment device at work is 2600 DEG C, and operating voltage is 380V, its W content are more than 99.95%.
6. the processing system according to claim 1 for removing benzene homologues in petrochemical industry waste gas, it is characterised in that tungsten wire circle The gas pre-mixed four-way valve of surface active-ozone Oxidation Treatment device enters one using three and goes out structure, and maximum pressure-bearing is 1.05MPa, Operating temperature range is 105 ~ 850 DEG C.
CN201610555324.0A 2016-07-15 2016-07-15 A kind of processing system for removing benzene homologues in petrochemical industry waste gas CN106110809B (en)

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CN201710929308.8A CN107441905B (en) 2016-07-15 2016-07-15 Processing system for removing benzene series in petrochemical industrial waste gas
CN201710929310.5A CN107441911B (en) 2016-07-15 2016-07-15 Processing system for removing benzene series in petrochemical waste gas
CN201610555324.0A CN106110809B (en) 2016-07-15 2016-07-15 A kind of processing system for removing benzene homologues in petrochemical industry waste gas
CN201710929277.6A CN107511043B (en) 2016-07-15 2016-07-15 A kind of processing system removing benzene homologues in petrochemical industry exhaust gas
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CN201710929310.5A Division CN107441911B (en) 2016-07-15 2016-07-15 Processing system for removing benzene series in petrochemical waste gas
CN201710929668.8A Division CN107511044B (en) 2016-07-15 2016-07-15 Processing system for removing benzene series in petrochemical industrial waste gas
CN201710929277.6A Division CN107511043B (en) 2016-07-15 2016-07-15 A kind of processing system removing benzene homologues in petrochemical industry exhaust gas
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CN107441904A (en) 2017-12-08
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