CN102743962B - Hydrolysis and oxidation device and method for treating industrial organic waste gas - Google Patents
Hydrolysis and oxidation device and method for treating industrial organic waste gas Download PDFInfo
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- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
本发明公开了一种用于工业有机废气治理的水解氧化装置及方法，其中，装置包括依次连接的水洗及水解塔、气液分离器、引风机和氧化塔；水洗、水解和氧化塔内均分别自下而上设两级布气-喷淋装置及一级除雾装置；水洗塔进气管上设阻火器，氧化塔设排放烟囱。其方法步骤是：废气经阻火器负压吸入水洗和水解塔内，分别经进气口和鲍尔环布气均匀后与雾化的水洗及水解液颗粒发生两级混溶及水解反应，除雾后经气液分离器去水由引风机送至氧化塔，再与雾化的氧化液发生两级氧化还原反应并除雾，废气达标后高空排放。本发明将水洗吸收、水解及氧化工艺有机结合，有效去除了污染物，降低了初期投资和运行费用，工人劳动强度小，系统稳定运行，无二次污染。
The invention discloses a hydrolysis oxidation device and method for treating industrial organic waste gas, wherein the device includes a water washing and hydrolysis tower, a gas-liquid separator, an induced draft fan and an oxidation tower connected in sequence; Two-stage air distribution-spraying device and one-stage demisting device are respectively installed from bottom to top; flame arrester is installed on the inlet pipe of water washing tower, and discharge chimney is installed on oxidation tower. The steps of the method are as follows: the exhaust gas is sucked into the water washing and hydrolysis tower through the negative pressure of the flame arrester, and the gas is uniformly distributed through the air inlet and the Pall ring respectively, and then undergoes two-stage miscibility and hydrolysis reaction with the atomized water washing and hydrolysis liquid particles. After the mist, the water is removed by the gas-liquid separator and sent to the oxidation tower by the induced draft fan, and then undergoes a two-stage oxidation-reduction reaction with the atomized oxidizing liquid to remove the fog, and the exhaust gas is discharged at high altitude after reaching the standard. The invention organically combines water washing absorption, hydrolysis and oxidation processes, effectively removes pollutants, reduces initial investment and operating costs, has low labor intensity, stable system operation, and no secondary pollution.
Description
Technical field
The invention belongs to waste gas pollution control and treatment technical field, relate to a kind of purification method for industrial organic exhaust gas.
Background technology
Along with expanding economy, the industries such as electronics, plastic cement, building materials, pharmacy, chemical industry develop rapidly in recent years, adding the inadequate of environmental protection investments dynamics, have caused the discharge of a large amount of industrial organic exhaust gas, and atmosphere quality is declined.The organic pollution that the enterprise of above-mentioned industry enters in atmospheric environment in process of production comprises the compounds such as benzene homologues, aldoketones, halogenated hydrocarbons, alcohols, especially pharmaceutical industry, its product category is various, renewal is fast, production process is complicated, production scale is little, and pollution treatment difficulty is larger.In many production processes, use a large amount of organic solvents, only have small part to become product, major part all enters in waste water and waste gas.Industrial organic exhaust gas pollutes and directly the healthy of people is worked the mischief, and to national economy, brings about great losses, and therefore, the processing of organic exhaust gas is imperative.
VOCs treatment technology can be divided into two large classes, and the one, recovery technology, refers to that methods such as adopting absorption and sorption, condensation, film separation is by the method for organic matter concentration and recovery regeneration in organic exhaust gas.Mainly comprise adsorption technology, absorption techniques, condensation (and balance of steam) technology and membrane separation technique etc.The organic solvent reclaiming can be directly used in the production technology that quality requirement is lower, or concentrates and carry out separating-purifying.The 2nd, destroy technology, refer to that effects such as utilizing optical, electrical, hot, catalyst, plasma or microorganism, by the method for the nonhazardous inorganic molecules compounds the such as thorough volatile organic matter of low concentration in organic exhaust gas decomposition and inversion Cheng Shui and carbon dioxide, mainly comprises the technology such as high temperature incineration, catalytic combustion, biological oxidation.Wherein absorption method, absorption process, Production by Catalytic Combustion Process are traditional VOCs treatment technology, are also current most widely used practical improvement technology.
Active carbon adsorption technology be applicable to low concentration, temperature lower than 50 ℃, concentration at 1-5000mg/m
3organic exhaust gas.Although specific area is large, absorption range of flue gas is complete.But its weak point is: need to carry out waste gas pretreatment; For high-concentration waste gas, have the result that purification efficiency is not high; Under wet condition, can not keep good adsorption capacity; Be not suitable for high-temp waste gas; Can produce non-adsorbable situation; The supplementary expense of regenerating active carbon is large; Equipment is huge.
Direct-Combustion Technology is applicable to high concentration, the organic exhaust gas of the occasion of working continuously.Can within certain time of staying of maintenance, can efficiently process high-concentration organic waste gas.But for low-concentration organic exhaust gas, need to expend a large amount of energy consumptions and maintain the required heat of decomposition.
Production by Catalytic Combustion Process is applicable to little air quantity, high concentration, the occasion of working continuously, concentration at 2000-6000mg/m
3organic exhaust gas.The equipment of realizing this process is simple, easy to operate; Purification ratio is more thorough; Non-secondary pollution; Can recycle heat energy; Initiation temperature is low.But catalyst cost is high; There is poisoning and life problems in catalyst; There is combustion explosion danger; Can not reclaim solvent.
Absorption process is applicable to various concentration, temperature lower than the organic exhaust gas of 100 ℃.Stable, convenient operating maintenance; Do not need pretreatment; Flow process is simple, and running expense is low; Floor space is little; Purification efficiency is high.But selectively large to organic principle; When having micelle material or other impurity in waste gas, adsorbent is easily poisoning; Easily there is secondary pollution.
To sum up, no matter be the traditional treatment method extensively adopting, or treatment technology newly developed, all there is factors (as the scope of application, removal capacity, investment operating cost etc.) to restrict the application of cell processing (realizing single processing capacity) technology.Therefore, seek effective treatment technology of such waste gas extremely urgent.At present, except promoting cell processing technique, emphasis is the combination technique of exploitation different units treatment process, to reach raising removal efficiency, reduces investment operating cost, reduces the object of secondary pollution.
Summary of the invention
For above-mentioned prior art, the invention provides a kind of hydrolysis oxidation method of administering for industrial organic exhaust gas, formed the combination of absorption, hydrolysis and oxidation technology in industrial organic exhaust gas governance process, not only can effectively remove the organic pollution in waste gas, and can reduce investment and the operating cost for the treatment of system, and realize process equipment simple, reduced workman's labour intensity, can guarantee system stable operation, can not produce secondary pollution simultaneously.
In order to solve the problems of the technologies described above, the technical scheme that the hydrolysis oxidation device that the present invention administers for industrial organic exhaust gas is achieved is: comprise the water scrubber, hydrolysis tower, gas-liquid separator, air-introduced machine and the oxidizing tower that connect successively; In described water scrubber, hydrolysis tower and oxidizing tower respectively from bottom to top be provided with two-stage gas distribution-spray equipment, at the top of second level gas distribution-spray equipment, be provided with demister; Described water scrubber is connected with circulating water pool 1, and described hydrolysis tower is connected with circulating water pool 2, and described oxidizing tower is connected with circulating water pool 3; Described circulating water pool 1, circulating water pool 2 and circulating water pool 3 are provided with respectively sewage draining exit and are connected to the water inlet at water source; Described circulating water pool 2 is also connected with hydrolysis flow container, and described circulating water pool 3 is also connected with oxidation flow container; The upstream of described water scrubber is provided with spark arrester, and described oxidizing tower is provided with blowdown stack.
Further, the hydrolysis oxidation device that the present invention administers for industrial organic exhaust gas, wherein, described circulating water pool 1, circulating water pool 2 and circulating water pool 3 are connected with water circulating pump respectively.All downward-sloping 45 ° of the air inlet mouths of pipe of described water scrubber and hydrolysis tower, the air inlet mouth of pipe of described oxidizing tower adopts inverted concave arrangement.Described gas distribution-spray equipment comprises from bottom to top the distribution device and the spray equipment that arrange, and described distribution device comprises Pall ring, and described spray equipment comprises atomizer, and the distance between described atomizer and distribution device peak at the same level is 1.0-1.2m.The inwall of described oxidizing tower is provided with Corrosion Protection of Fiber Reinforced Plastics layer, and the thickness of described Corrosion Protection of Fiber Reinforced Plastics layer is 2mm.
The step of the hydrolysis oxidation method that the present invention administers for industrial organic exhaust gas is as follows:
Waste gas is after spark arrester, by air-introduced machine negative pressure, sucked in water scrubber, waste gas flows from bottom to top after 45 ° of air inlet mouths of pipe reduce flow velocitys, and meanwhile, spray liquid forms mobile diameter from top to bottom and reach the atomizing particle of micron level after atomizer atomization; Waste gas contacts with atomizing particle after Pall ring gas distribution is even, miscible through the gas-liquid two-phase of two-stage, tentatively reduces waste gas organic contamination substrate concentration, finally after demister demist, by air-introduced machine negative pressure, is sucked in hydrolysis tower;
Hydrolyzate is promoted to the spray equipment in hydrolysis tower by water circulating pump, after atomizer atomization, exchange with exhaust emission mass transfer, hydrolysis occurs, and two-stage hydrolysis waste gas after treatment is delivered in oxidizing tower by air-introduced machine malleation after gas-liquid separator is discharged moisture;
Oxidation solution is promoted to the spray equipment place in oxidizing tower by water circulating pump, after atomizer atomization, with the exchange of exhaust emission mass transfer, redox reaction occurs; Two-stage oxidation reduction reaction waste gas after treatment reaches < < discharge standard of air pollutants > > (GB16297-1996), and the smoke stack emission through being positioned at oxidizing tower top is to high-altitude.
Further, the hydrolysis oxidation method that the present invention administers for industrial organic exhaust gas, described hydrolyzate is selected from the one in sodium hydroxide solution, dilute sulfuric acid and watery hydrochloric acid, preferably sodium hydroxide solution.
Described oxidation solution is selected from the one in liquor natrii hypochloritis, iron chloride and hydrogen peroxide, preferably liquor natrii hypochloritis.
Spray liquid in described water scrubber is selected from the one in running water, recycle-water and ethanol, preferably running water or recycle-water; Hydrolysis spray liquid in described hydrolysis tower (20) is selected from the one in sodium hydroxide solution, dilute sulfuric acid and watery hydrochloric acid, preferably sodium hydroxide solution; Oxidation spray liquid in described oxidizing tower (50) is selected from the one in liquor natrii hypochloritis, iron chloride and hydrogen peroxide, preferably liquor natrii hypochloritis.
Compared with prior art, the invention has the beneficial effects as follows:
At present, for the improvement of industrial organic exhaust gas, adopt absorbing process, and because absorbing process is subject to the impact of exhausted air quantity and adsorption capacity more, huge when reaching after finite concentration or certain tolerance adsorption system equipment.The most scabrous problem is that to be subject to industrial production feature to affect toxic emission concentration unstable, and adsorbent saturation time is not easy to determine, treatment effect is unstable, causes the waste gas can not stably reaching standard discharge.
The present invention introduces the group technology of water absorption, hydrolysis and oxidation in industrial organic exhaust gas processing, wherein gas distribution-the spray equipment of waste gas is the core of each reaction tower, can efficiently remove organic pollution, the clearance of whole system is up to more than 99%, and removal effect is stable, has substituted simple absorption or absorption or oxidation technology.The impact that the hydrolysis oxidation method that the present invention administers for industrial organic exhaust gas is not changed by exhaust gas properties, organic pollution that can be fast and in steady removal waste gas, thoroughly solved deficiency of the prior art, meanwhile, also thoroughly solved the difficult grasp of adsorbent saturation point, absorbent secondary pollution, the technical problems such as treatment effect is unstable, technique of the present invention is simple, economical, reliable, and less demanding to workman's technical merit, controllability is strong.
Accompanying drawing explanation
Fig. 1 is that the present invention administers process flow diagram for industrial organic exhaust gas hydrolysis oxidation;
Fig. 2 is basic structure and the annexation schematic diagram of water scrubber in the present invention, hydrolysis tower and oxidizing tower.
In figure:
10-water scrubber, 20-hydrolysis tower, 30-gas-liquid separator, 40-air-introduced machine, 50-oxidizing tower, 60-chimney, 1-spark arrester, the 2-45 ° of air inlet mouth of pipe, 31-first order distribution device, 41-first order spray equipment, 32-second level distribution device, 42-second level spray equipment, 5-demister, the 6-inverted concave air inlet mouth of pipe.
The specific embodiment
Below in conjunction with the specific embodiment, the present invention is described in further detail.
As depicted in figs. 1 and 2, the hydrolysis oxidation device that the present invention administers for industrial organic exhaust gas, comprises the water scrubber 10, hydrolysis tower 20, gas-liquid separator 30, air-introduced machine 40 and the oxidizing tower 50 that connect successively, described water scrubber 10, in hydrolysis tower 20 and oxidizing tower 50 respectively from bottom to top be provided with first, second level gas distribution-spray equipment, first order gas distribution-spray equipment comprises the first order distribution device 31 and the first order spray equipment 41 that arrange from bottom to top, second level gas distribution-spray equipment comprises the second level distribution device 32 and the second level spray equipment 42 that arrange from bottom to top, every grade of distribution device all adopts Pall ring structure, the nozzle of described spray equipment is atomizer, distance between described atomizer and described distribution device peak is 1.0-1.2m, at the top of second level gas distribution-spray equipment, be provided with demister 5.All downward-sloping 45 ° of the air inlet mouths of pipe of described water scrubber 10 and hydrolysis tower 20, have formed 45 ° of air inlet mouths of pipe 2, and the air inlet mouth of pipe of described oxidizing tower 50 adopts inverted concave arrangement; Described water scrubber 10 is connected with circulating water pool 1, described hydrolysis tower 20 is connected with circulating water pool 2, described oxidizing tower 50 is connected with circulating water pool 3, and described circulating water pool 1, circulating water pool 2 and circulating water pool 3 are connected with water circulating pump respectively, as shown in Figure 1 pump, pump 2 and pump 3.Described circulating water pool 1, circulating water pool 2 and circulating water pool 3 are provided with respectively sewage draining exit and are connected to the water inlet at water source; Described circulating water pool 2 is also connected with hydrolysis flow container, and described circulating water pool 3 is also connected with oxidation flow container; The upstream of described water scrubber 10 is provided with spark arrester 1, and the inwall of described oxidizing tower 50 is provided with Corrosion Protection of Fiber Reinforced Plastics layer, and the thickness of described Corrosion Protection of Fiber Reinforced Plastics layer is 2mm, and described oxidizing tower 50 is provided with blowdown stack 60.
The hydrolysis oxidation method that the present invention administers for industrial organic exhaust gas comprises the following steps:
Waste gas is after spark arrester 1, by air-introduced machine 40 negative pressure, sucked in water scrubber 10, the interior waste gas of described water scrubber 10 reduces after flow velocity through 45 ° of air inlet mouths of pipe 2, the uniform waste gas of Pall ring in every grade of distribution device, guarantee gas distribution uniformity, avoided short flow phenomenon to produce, compared with conventional treatment system, improve contact area and the reaction time of waste gas and spray liquid, guaranteed the purification efficiency of waste gas.Waste gas flows from bottom to top, wherein, the nozzle of spray equipment is selected atomizer, and atomizer can, by spray liquid atomization ejection, evenly be suspended in air, and form mobile diameter from top to bottom and reach the atomizing particle of micron level, the probability that has improved spray liquid and waste gas collision, has increased the reaction time, gas-liquid mass transfer, improve purification efficiency, greatly reduce medicament expense simultaneously and use and operating cost; Due in water scrubber 10 from bottom to top be in series with two-stage gas distribution-spray equipment, and the top of the second level gas distribution-spray equipment above being positioned at is provided with demister 5, waste gas contacts with atomizing particle after Pall ring gas distribution is even, gas-liquid two-phase through two-stage is miscible, the preliminary waste gas organic contamination substrate concentration that reduces is finally sucked in hydrolysis tower 20 by air-introduced machine 40 negative pressure after demister demist;
The structure of the structure of hydrolysis tower 20 and water scrubber 10 is basic identical; Adopt sodium hydroxide solution as hydrolyzate, hydrolyzate is promoted to the spray equipment in hydrolysis tower 20 by water circulating pump, after atomizer atomization, exchange with exhaust emission mass transfer, there is hydrolysis, through the two-stage gas distribution-spray equipment in hydrolysis tower 20, hydrolysis waste gas after treatment is delivered in oxidizing tower 50 by air-introduced machine 40 malleations after gas-liquid separator 30 gas-water separation are discharged moisture; After air-introduced machine 40 is placed in gas-liquid separator 30, main cause has two: the one, and industrial organic exhaust gas has certain corrosivity and adopts negative pressure inlet mode to avoid blower fan to form corrosion; The 2nd, save and take up an area, reduce pipeline investment.
The structure of oxidizing tower 50 is substantially also identical with the structure of water scrubber 10, and its difference is only that the air inlet mouth of pipe of oxidizing tower adopts inverted concave arrangement, has formed the inverted concave air inlet mouth of pipe 6, as shown in Figure 2; Hypochlorous sodium solution is as oxidation solution, and oxidation solution is promoted to the spray equipment place in oxidizing tower 50 by water circulating pump, after atomizer atomization, with the exchange of exhaust emission mass transfer, redox reaction occurs; Through the two-stage gas distribution-spray equipment in oxidizing tower 50, carry out redox reaction processing;
Waste gas reaches < < discharge standard of air pollutants > > (GB16297-1996) through above-mentioned water absorption-hydrolysis-oxidation tertiary treatment and is disposed to high-altitude by the chimney 60 that is positioned at oxidizing tower 50 tops.
The present invention adopts the group technology of water absorption-hydrolysis-oxidation to substitute traditional absorption technique or absorbing process, has solved the easily problem of poisoning and easy secondary pollution of absorbent, has also solved adsorbent easily saturated, the problems such as need regeneration simultaneously.
In the present invention, the spray liquid of water scrubber 10, hydrolysis tower 20 and oxidizing tower 50 is deposited to the circulating water pool that be connected corresponding to tower, utilizes water circulating pump to promote and recycles, until concentration can be supplemented part medicament when lower.Preferably regularly (first quarter or half a year) is measured the circulation fluid in circulating water pool 1, circulating water pool 2 and circulating water pool 3, when pollutant levels COD is during higher than 3000mg/L, discharge a small amount of part circulation fluid to sewage disposal system, and supplement part circulation fluid to guarantee the concentration of circulation fluid in circulating water pool.
Below in conjunction with device of the present invention, further describe water absorption-hydrolysis-oxidation tertiary treatment process and principle thereof.
1. spark arrester 1: in the present invention, first organic exhaust gas passes through fire-retardant filtration before entering hydrolysis oxidation device, prevents the propagation of flame between equipment, simultaneously slightly dedusting play the effect of even gas distribution distribution.
2. water scrubber 10: gas distribution-spray equipment and demister 5 that waste gas inlet, waste gas are set in water scrubber 10.Waste gas flows from bottom to top after air inlet reduces flow velocity, after Pall ring gas distribution is even, contact with the spray liquid being atomized again, miscible through gas-liquid two-phase, tentatively reduce waste gas organic contamination substrate concentration, finally through demister, 5 demists enter in hydrolysis tower 20.Wherein, waste gas inlet adopts downward-sloping 45 ° of otch form of tubes, has formed 45 ° of air inlet mouths of pipe 2, and the gas distribution area that can effectively expand air inlet with this, reduces waste gas flow velocity, improves follow-up gas distribution uniformity.The functor Pall ring of gas distribution is carried by supporting construction the most, and its thickness is between 150mm-400mm, can not be blocked up, in order to avoid resistance is excessive, cause energy waste, and also avoided spray liquid to form tower wall effect simultaneously.Spray equipment is comprised of shower, atomizer and support member three parts, according to the quantity of atomizer in the adjustable spray equipment of waste gas organic contamination substrate concentration, when arranging, shower and atomizer should avoid dead angle as far as possible, each atomizer service area need guarantee minimum the intersection, atomizer to distribution device peak at the same level must meet the service height of nozzle, is generally 1.0-1.2m.In the present invention, be the gas distribution-spray equipment that adopts two-stage to arrange from bottom to top, and at the top of second level spray equipment, demister be set.Demister consists of 25-30mm Pall ring and support member, and thickness is 100mm-200mm.In the present invention, the spray liquid of water absorption process adopts running water or recycle-water, and recycles.
In the present invention, the cardinal principle of water absorption technique is: the organic solvent kind in industrial waste gas is more, wherein organic solvent soluble in water is as alcohols materials such as ethanol, methyl alcohol, the materials such as dioxane, oxolane, DMF, acetonitrile are also all soluble in water, and can arbitrary proportion dissolve each other, after they are water-soluble, it is good organic solvent, except sturated aliphatic hydrocarbon, can with nearly all immiscible organic solvent.Therefore, the spray liquid of water scrubber adopts running water or recycle-water, and recycles and can improve organic matter water-soluble in waste gas, thereby reduces the organic contamination substrate concentration in waste gas.
3. hydrolysis tower: the internal structure of hydrolysis tower 20 of the present invention is substantially similar to water scrubber 10, hydrolyzate adopts sodium hydroxide solution, by water circulating pump, be promoted to spray equipment place in hydrolysis tower, after atomizer atomization, with the exchange of exhaust emission mass transfer, hydrolysis occur.The chemical constitution and the chemical property that by hydrolysis, change pollutant, be dissolved in alkaline solution, and reach the object of purifying contaminated thing.Concrete reaction equation is exemplified below:
Chlorocarbon class hydrolysis:
Oxolane hydrolysis:
Hydrolysis of ethyl acetate reaction:
DMF (DMF) hydrolysis:
Cardinal principle can, referring to aforesaid equation, also can be hydrolyzed spray liquid according to the kind of the organic pollution in waste gas and concentration adjustment, and hydrolyzate can adopt the one in sodium hydroxide solution, dilution heat of sulfuric acid or dilute hydrochloric acid solution.
3. gas-liquid separator 30 and air-introduced machine 40: in the present invention, gas-liquid separator 30 is mainly to prevent that moisture from entering in air-introduced machine 40, particularly often occurs condensed water in pipeline in winter, discharges after can separating by gas-liquid separator 30.Air-introduced machine 40 is placed on before oxidizing tower 50, is mainly to prevent that air-introduced machine 40 is corroded, and improves the service life of blower fan.
4. oxidizing tower 50: the internal structure of oxidizing tower 50 of the present invention and the first two column foot are originally similar, difference is only that waste gas is to be delivered in oxidizing tower 50 by air-introduced machine 40 malleations, so the air inlet mouth of pipe of oxidizing tower 50 adopts inverted concave arrangement, thereby form inverted concave air inlet pipe mouth structure, with this, can reduce waste gas flow velocity.Oxidation solution adopts liquor natrii hypochloritis, by water circulating pump, be promoted to the spray equipment place in oxidizing tower 50, after atomization, with the exchange of exhaust emission mass transfer, redox reaction occur, change chemical property and the chemical constitution of pollutant, thereby reach the object of purifying contaminated thing.Concrete reaction equation is exemplified below:
N-butyl alcohol oxidation becomes the reaction of n-butyric acie:
Toluene oxidation becomes benzoic reaction:
Cardinal principle can, referring to aforesaid equation, also can be oxidized spray liquid according to the kind of the organic pollution in waste gas and concentration adjustment, and oxidation solution can adopt the one in liquor natrii hypochloritis, ferric chloride solution or hydrogen peroxide solution.
Waste gas after above serial purified treatment, up to standard after through smoke stack emission to high-altitude.Spray liquid is deposited to circulating water pool, utilizing pump to promote recycles, regularly (per season or every half a year) is to circulation fluid mensuration in circulating water pool, when pollutant levels COD is during higher than 3000mg/L, discharge a small amount of part circulation fluid to sewage disposal system, and supplement part circulation fluid to guarantee the concentration of circulation fluid to circulating water pool.Rule of thumb, circulating water pool is take replenishment cycles liquid as main.
Development test example: select from a certain chemical synthesis pharmaceuticals industry VOCs treatment engineering, by reference to the accompanying drawings implementation process of the present invention is illustrated:
Research material: mainly contain the organic pollutions such as methyl alcohol, ethanol, toluene, dioxane, oxolane, ethyl acetate in organic exhaust gas, EGT is normal temperature.
The present invention comprises spark arrester 1, and waste gas is carried out to fire-retardant filtration, prevents the propagation of flame between equipment, slightly dedusting simultaneously.Differential manometer 1 is set, for predicting spark arrester 1 stopping state on the pipeline of spark arrester 1.The outlet of spark arrester 1 connects the water scrubber 10 gas inlet mouths of pipe 2, what the gas inlet mouth of pipe adopted is downward-sloping 45 ° of otch form of tubes, after reducing flow velocity, 45 ° of air inlet mouths of pipe 2 enter distribution device, distribution device is comprised of bracing or strutting arrangement and 250mm thickness Pall ring, Pall ring diameter is 35-40mm, through distribution device, can improve the interior waste gas uniformity of water scrubber 10, avoids short stream, improve spray liquid and waste gas collision probability, improve reaction efficiency.Waste gas flow from bottom to top with the spray equipment atomization on distribution device top after spray liquid miscible, spray liquid adopts running water or plant area's recycle-water, by water circulating pump, be promoted to first order spray equipment 41 and second level spray equipment 42 places of water scrubber 10, spray liquid diameter after atomization can reach micron level, increase the gas liquid reaction time, guaranteed the removal efficiency of organic contamination in waste gas.In the present embodiment, adopt the gas distribution-spray equipment of two-stage series connection, after the abundant reaction of two-stage gas distribution-spray equipment, waste gas enters the demister 5 at water scrubber 10 tops, after the moisture in removal waste gas, through negative pressure, sucks in hydrolysis tower 20.Demister 5 is that 25-30mm Pall ring and support form by diameter, and Pall ring thickness is 150mm.The structure of hydrolysis tower is substantially similar to water scrubber, hydrolyzate adopts sodium hydroxide solution, by water circulating pump, be promoted to first order spray equipment 41 and second level spray equipment 42 places of hydrolysis tower 20, after nozzle atomization, with the exchange of exhaust emission mass transfer, hydrolysis occur.The chemical constitution and the chemical property that by hydrolysis, change pollutant, be dissolved in alkaline solution, and reach the object of purifying contaminated thing.Gas-liquid separator 30 is set after hydrolysis tower 20, and the moisture containing for removing waste gas, avoids waste gas to cause corrosion to air-introduced machine 40 below.Air-introduced machine 40 is introduced waste gas negative pressure in water scrubber 10 and hydrolysis tower 20, and malleation is sent in oxidizing tower 50, in water scrubber 10 and hydrolysis tower 20, react incomplete or unreacted organic matter through the oxidation solution oxidation in oxidizing tower 50, reach after discharge standard through chimney 60 high altitude discharges.The structure of oxidizing tower and the first two column foot are originally similar, and oxidation solution adopts liquor natrii hypochloritis, and liquor natrii hypochloritis's effective chlorine is considered by 10%.Oxidation solution is promoted to the first spray equipment 41 and the second spray equipment 42 places in oxidizing tower 50 by water circulating pump, after nozzle atomization, with the exchange of exhaust emission mass transfer, oxidation reaction occurs.By oxidation reaction, change chemical constitution and the chemical property of pollutant, thereby reach the object of purifying contaminated thing.Corrosion for fear of oxidant to oxidizing tower, the inner Corrosion Protection of Fiber Reinforced Plastics that adopts of oxidizing tower, Corrosion Protection of Fiber Reinforced Plastics thickness is about 2mm.Spray liquid all adopts the mode of recycling, in use according to actual conditions replenishment cycles liquid (comprising running water or recycle-water, sodium hydroxide solution and liquor natrii hypochloritis).When the circulation fluid concentration in circulating water pool can be discharged a small amount of part to sewage disposal system during higher than 3000mg/L.
Although in conjunction with figure, invention has been described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; in the situation that not departing from aim of the present invention, can also make a lot of distortion, within these all belong to protection of the present invention.
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| CN104841595A (en) * | 2015-05-23 | 2015-08-19 | 江苏景中景工业涂装设备有限公司 | Novel environment-friendly waste gas treatment system for paint spraying and baking equipment |
| CN105387472B (en) * | 2015-12-04 | 2018-02-23 | 赛鼎工程有限公司 | A kind of a variety of foul gas combined treatment process of coal chemical industry |
| CN105642106A (en) * | 2016-03-28 | 2016-06-08 | 天津市联合环保工程设计有限公司 | Treatment device and treatment method for meeting high-standard emission gas concentration of volatile organic compounds |
| CN106861398A (en) * | 2016-12-14 | 2017-06-20 | 江苏大信环境科技有限公司 | A kind of organic exhaust gas hydrolysis incineration treatment technology containing acrylonitrile |
| CN107243230A (en) * | 2017-07-21 | 2017-10-13 | 商志民 | A kind of processing unit of organic exhaust gas |
| CN109550362A (en) * | 2017-09-27 | 2019-04-02 | 西安天鑫利环保科技有限公司 | A kind of exhaust treatment system and its waste gas processing method |
| CN108786419B (en) * | 2018-06-23 | 2020-11-10 | 台州一帆环保设备科技有限公司 | Comprehensive treatment system for various waste gases |
| CN109046018A (en) * | 2018-09-30 | 2018-12-21 | 广东键盟环保科技有限公司 | A kind of VOC exhaust gas liquid phase photocatalysis treatment system and VOC waste gas processing method |
| CN110052102A (en) * | 2019-04-19 | 2019-07-26 | 西安工程大学 | A kind of multistage composite filtering type weld fumes purification system |
| CN110064292A (en) * | 2019-05-13 | 2019-07-30 | 江苏龙泰环保设备制造有限公司 | A kind of Chinese medicine production method for purifying and processing waste gas |
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| CN202683054U (en) * | 2012-07-24 | 2013-01-23 | 天津市环境保护科学研究院 | Hydrolysis oxidation device for treating industrial organic waste gas |
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| CN202683054U (en) * | 2012-07-24 | 2013-01-23 | 天津市环境保护科学研究院 | Hydrolysis oxidation device for treating industrial organic waste gas |
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