CN102743962A - 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 PDF

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Publication number
CN102743962A
CN102743962A CN2012102585627A CN201210258562A CN102743962A CN 102743962 A CN102743962 A CN 102743962A CN 2012102585627 A CN2012102585627 A CN 2012102585627A CN 201210258562 A CN201210258562 A CN 201210258562A CN 102743962 A CN102743962 A CN 102743962A
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hydrolysis
oxidation
tower
gas
waste gas
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CN102743962B (en
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徐淼
张金凤
马艳宁
刘晓亮
冯海军
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Tianjin Academy of Environmental Sciences
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Tianjin Academy of Environmental Sciences
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Abstract

The invention discloses hydrolysis and oxidation device and method for treating an industrial organic waste gas, wherein the hydrolysis and oxidation device comprises a washing tower, a hydrolytic tower, a gas-liquid separator, a draught fan and an oxidizing tower, the washing tower, the hydrolytic tower and the oxidizing tower are all respectively internally provided with two-stage gas distribution-spray devices and one-stage defogging devices from top to bottom, a gas inlet pipe of the washing tower is provided with a flame arrester, and the oxidizing tower is provided with a blowdown stack. The hydrolysis and oxidation method comprises the following steps that: the industrial organic waste gas is absorbed into the washing tower and the hydrolytic tower through the negative pressure of the flame arrester, respectively uniformly distributed through a gas inlet and a Pall ring and then subjected to two-stage miscible and hydrolytic reaction with atomized washing and hydrolytic liquor granules; the waste gas is defogged, then dehydrated through the gas-liquid separator and delivered into the oxidizing tower through the draught fan and then subjected to two-stage oxidation-reduction reaction with atomized oxidized liquor and defogged; and the waste gas is emitted to upper air after reaching the standard. In the invention, a washing absorption process, a hydrolysis process and an oxidation process are organically combined, thereby effectively removing the pollutants and reducing the initial investment and the operation cost; and in addition, the invention has low labor intensity of workers, stable system operation without secondary pollution.

Description

Be used for the hydrolysis oxidation device and method that industrial organic exhaust gas is administered
Technical field
The invention belongs to the waste gas pollution control and treatment technical field, relate to a kind of purification method that is used for industrial organic exhaust gas.
Background technology
Along with expanding economy, industries such as electronics, plastic cement, building materials, pharmacy, chemical industry develop rapidly in recent years, adding the not enough of environmental protection investments dynamics, have caused the discharging of a large amount of industrial organic exhaust gas, make atmosphere quality descend.The organic pollution that the enterprise of above-mentioned industry enters in the atmospheric environment in process of production comprises compounds such as benzene series thing, aldoketones, halogenated hydrocarbons, alcohols; Especially pharmaceutical industry; Its product category is various, renewal is fast, production process is complicated, production scale is little, and the pollution treatment difficulty is bigger.In many production processes, use a large amount of organic solvents, have only few part to become product, major part all gets in waste water and the waste gas.Industrial organic exhaust gas pollutes and directly the healthy of people is worked the mischief, and brings about great losses to national economy, and therefore, the processing of organic exhaust gas is imperative.
The organic exhaust gas technology of administering can be divided into two big types, and the one, recovery technology is meant that methods such as adopting absorption, absorption, condensation, film separation concentrates organic matter in the organic exhaust gas method of reclaiming.Mainly comprise adsorption technology, absorption techniques, condensation (and balance of steam) technology and membrane separation technique etc.The organic solvent that reclaims can directly be used for the lower production technology of quality requirement, perhaps concentrates and separates purification.The 2nd, destroy technology; Be meant the method with nonhazardous inorganic molecules compounds such as thorough decomposition and inversion Cheng Shui of the volatile organic matter of low concentration in the organic exhaust gas and carbon dioxide such as the effect that utilizes light, electricity, heat, catalyst, plasma or microorganism, mainly comprise technology such as high temperature incineration, catalytic combustion, biological oxidation.Wherein absorption method, absorption process, Production by Catalytic Combustion Process are traditional organic exhaust gas improvement technology, also are present most widely used practical improvement technology.
The charcoal absorption technology is applicable to that low concentration, temperature are lower than 50 ℃, concentration at 1-5000mg/m 3Organic exhaust gas.Though specific area is big, the absorption range of flue gas is complete.But its weak point is: need carry out the waste gas preliminary treatment; Have the not high result of purification efficiency to high-concentration waste gas; Under wet condition, can not keep good adsorption capacity; Be not suitable for high-temp waste gas; Can produce non-adsorbable situation; The additional expense of regeneration of activated carbon is big; Equipment is huge.
Direct combustion technology is applicable to high concentration, the organic exhaust gas of the occasion of working continuously.Can be in that keep can efficient treatment of high concentration organic exhaust gas in certain time of staying.But need the energy consumption of labor to keep to low-concentration organic exhaust gas and decompose required heat.
Production by Catalytic Combustion Process is applicable to that little air quantity, high concentration, the occasion of working continuously, concentration are at 2000-6000mg/m 3Organic exhaust gas.The equipment of realizing this process is simple, and is easy to operate; Purification ratio is more thorough; Non-secondary pollution; Can recycle heat energy; Initiation temperature is low.But the catalyst cost is high; Catalyst exists poisons and life problems; There is combustion explosion dangerous; Can not reclaim solvent.
Absorption process is applicable to that various concentration, temperature are lower than 100 ℃ organic exhaust gas.Stable, convenient operating maintenance; Do not need preliminary treatment; Flow process is simple, and running expense is low; Floor space is little; Purification efficiency is high.But it is big to the organic principle selectivity; When micelle material or other impurity were arranged in the waste gas, adsorbent was prone to poison; Secondary pollution appears easily.
To sum up, no matter be the traditional treatment method that extensively adopts, still treatment technology newly developed all has many factors (like the scope of application, removal performance, investment operating cost etc.) to restrict cell processing (promptly realizing single processing capacity) The Application of Technology.Therefore, it is extremely urgent to seek effective treatment technology of such waste gas.At present, except promoting cell processing technology, emphasis is the combination technique of exploitation different units treatment process, removes efficient to reach to improve, and reduces the investment operating cost, reduces the purpose of secondary pollution.
Summary of the invention
To above-mentioned prior art, the present invention provides a kind of hydrolysis oxidation method that industrial organic exhaust gas is administered that is used for, and has formed the combination of absorption, hydrolysis and oxidation technology in the industrial organic exhaust gas governance process; Not only can effectively remove the organic pollution in the waste gas; And can reduce the investment and the operating cost of treatment system, and realize that process equipment is simple, reduced working strength of workers; Simultaneously system stable operation can be guaranteed, secondary pollution can be do not produced.
In order to solve the problems of the technologies described above, the present invention is used for the technical scheme that hydrolysis oxidation device that industrial organic exhaust gas administers is achieved and is: comprise the water scrubber, hydrolysis tower, gas-liquid separator, air-introduced machine and the oxidizing tower that connect successively; In said water scrubber, hydrolysis tower and the oxidizing tower respectively from bottom to top be provided with two-stage gas distribution-spray equipment, the top of gas distribution-spray equipment is provided with demister in the second level; Said water scrubber is connected with circulating water pool 1, and said hydrolysis tower is connected with circulating water pool 2, and said oxidizing tower is connected with circulating water pool 3; Said circulating water pool 1, circulating water pool 2 and circulating water pool 3 are provided with sewage draining exit respectively and are connected to the water inlet at water source; Said circulating water pool 2 also is connected with the hydrolysis flow container, and said circulating water pool 3 also is connected with the oxidation flow container; The upper reaches of said water scrubber are provided with spark arrester, and said oxidizing tower is provided with blowdown stack.
Say that further the present invention is used for the hydrolysis oxidation device that industrial organic exhaust gas is administered, wherein, said 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 mouth of pipe of said water scrubber and hydrolysis tower, the air inlet mouth of pipe of said oxidizing tower adopts the inverted concave arrangement.Said gas distribution-spray equipment comprises distribution device and the spray equipment that is provided with from bottom to top, and said distribution device comprises Pall ring, and said spray equipment comprises atomizer, and the distance between the distribution device peak of said atomizer and peer is 1.0-1.2m.The inwall of said oxidizing tower is provided with the fiberglass anticorrosive coat, and the thickness of said fiberglass anticorrosive coat is 2mm.
The step that the present invention is used for the hydrolysis oxidation method that industrial organic exhaust gas administers is following:
Waste gas is through behind the spark arrester; Suck in the water scrubber by the air-introduced machine negative pressure; Waste gas flows after reducing flow velocity through 45 ° of air inlet mouths of pipe from bottom to top, and meanwhile, spray liquid forms the atomizing particle that the diameter that flows reaches micron level from top to bottom after the atomizer atomizing; Waste gas evenly contacts with atomizing particle the back through the Pall ring gas distribution, and is miscible through the gas-liquid two-phase of two-stage, tentatively reduces waste gas organic contamination substrate concentration, finally through being sucked in the hydrolysis tower by the air-introduced machine negative pressure after the demister demist;
Hydrolyzate is promoted to the spray equipment in the hydrolysis tower by water circulating pump; After the atomizer atomizing, exchange with the exhaust emission mass transfer; Hydrolytic reactions, the waste gas after the two-stage hydrolysis is handled are delivered in the oxidizing tower by the air-introduced machine malleation after discharging moisture through gas-liquid separator;
Oxidation liquid is promoted to the spray equipment place in the oxidizing tower by water circulating pump, after the atomizer atomizing, with the exchange of exhaust emission mass transfer, redox reaction takes place; Waste gas after the two-stage oxidation reduction reaction is handled reaches " discharge standard of air pollutants " (GB16297-1996), through the smoke stack emission that is positioned at the oxidizing tower top to the high-altitude.
Say that further the present invention is used for the hydrolysis oxidation method that industrial organic exhaust gas is administered, said hydrolyzate is selected from a kind of in sodium hydroxide solution, dilute sulfuric acid and the watery hydrochloric acid, preferred sodium hydroxide solution.
Said oxidation liquid is selected from a kind of in liquor natrii hypochloritis, iron chloride and the hydrogen peroxide solution, preferred liquor natrii hypochloritis.
Spray liquid in the said water scrubber is selected from a kind of in running water, recycle-water and the ethanol, preferred running water or recycle-water; Hydrolysis spray liquid in the said hydrolysis tower (20) is selected from a kind of in sodium hydroxide solution, dilute sulfuric acid and the watery hydrochloric acid, preferred sodium hydroxide solution; Oxidation spray liquid in the said oxidizing tower (50) is selected from a kind of in liquor natrii hypochloritis, iron chloride and the hydrogen peroxide solution, preferred liquor natrii hypochloritis.
Compared with prior art, the invention has the beneficial effects as follows:
At present, absorbing process is adopted in the improvement that is used for industrial organic exhaust gas more, and because absorbing process receives the influence of exhausted air quantity and adsorption capacity, adsorption system equipment is huge after reaching finite concentration or certain tolerance.The most scabrous problem is to receive the commercial production characteristics to influence toxic emission concentration instability, and the adsorbent saturation time is not easy to confirm that treatment effect is unstable, causes waste gas not discharge by stably reaching standard.
The present invention will wash the group technology of absorption, hydrolysis and oxidation and introduce in the 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 present invention is used for the influence that hydrolysis oxidation method that industrial organic exhaust gas administers is not changed by exhaust gas properties, can be fast and the organic pollution in the steady removal waste gas, thoroughly solved deficiency of the prior art; Simultaneously, also thoroughly solved the difficult grasp of adsorbent saturation point, the absorbent secondary pollution; Technical problems such as treatment effect instability; Technology of the present invention is simple, economical, reliable, and less demanding to workman's technical merit, controllability is strong.
Description of drawings
Fig. 1 is that the present invention is used for industrial organic exhaust gas hydrolysis oxidation improvement process flow diagram;
Fig. 2 is the basic structure and the annexation sketch map of water scrubber among the present invention, hydrolysis tower and oxidizing tower.
Among the figure:
The 10-water scrubber, 20-hydrolysis tower, 30-gas-liquid separator, 40-air-introduced machine; The 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 done to describe in further detail.
As depicted in figs. 1 and 2, the present invention is used for the hydrolysis oxidation device that industrial organic exhaust gas is administered, and comprises the water scrubber 10, hydrolysis tower 20, gas-liquid separator 30, air-introduced machine 40 and the oxidizing tower 50 that connect successively; In said water scrubber 10, hydrolysis tower 20 and the oxidizing tower 50 respectively from bottom to top be provided with first, second grade gas distribution-spray equipment; First order gas distribution-spray equipment comprises the first order distribution device 31 and first order spray equipment 41 that is provided with from bottom to top; Second level gas distribution-spray equipment comprises the second level distribution device 32 and second level spray equipment 42 that is provided with from bottom to top; Every grade of distribution device all adopts the Pall ring structure; The nozzle of said spray equipment is an atomizer, and the distance between said atomizer and the said distribution device peak is 1.0-1.2m, and the top of gas distribution-spray equipment is provided with demister 5 in the second level.All downward-sloping 45 ° of the air inlet mouth of pipe of said water scrubber 10 and hydrolysis tower 20 has promptly formed 45 ° of air inlet mouths of pipe 2, and the air inlet mouth of pipe of said oxidizing tower 50 adopts the inverted concave arrangement; Said water scrubber 10 is connected with circulating water pool 1; Said hydrolysis tower 20 is connected with circulating water pool 2; Said oxidizing tower 50 is connected with circulating water pool 3, and said circulating water pool 1, circulating water pool 2 and circulating water pool 3 are connected with water circulating pump, pump as shown in fig. 1, pump 2 and pump 3 respectively.Said circulating water pool 1, circulating water pool 2 and circulating water pool 3 are provided with sewage draining exit respectively and are connected to the water inlet at water source; Said circulating water pool 2 also is connected with the hydrolysis flow container, and said circulating water pool 3 also is connected with the oxidation flow container; The upper reaches of said water scrubber 10 are provided with spark arrester 1, and the inwall of said oxidizing tower 50 is provided with the fiberglass anticorrosive coat, and the thickness of said fiberglass anticorrosive coat is 2mm, and said oxidizing tower 50 is provided with blowdown stack 60.
The hydrolysis oxidation method that the present invention is used for industrial organic exhaust gas improvement may further comprise the steps:
Waste gas is sucked in the water scrubber 10 by air-introduced machine 40 negative pressure through behind the spark arrester 1, after waste gas reduces flow velocity through 45 ° of air inlet mouths of pipe 2 in the said water scrubber 10; Pall ring in every grade of distribution device is uniformly distributed with waste gas; Guaranteed the gas distribution uniformity, avoided short flow phenomenon to produce, system compares with conventional treatment; Improve the 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, and wherein, the nozzle of spray equipment is selected atomizer for use; Atomizer can evenly be suspended in spray liquid atomizing ejection in the air, and form the atomizing particle that the diameter that flows reaches micron level from top to bottom; Improve the probability of spray liquid and waste gas collision, increased the reaction time, the gas-liquid two-phase mass transfer; Improve purification efficiency, greatly reduce medicament expense simultaneously and use and operating cost; Since in the 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 evenly contacts with atomizing particle the back through the Pall ring gas distribution; Gas-liquid two-phase through two-stage is miscible, tentatively reduces waste gas organic contamination substrate concentration, finally through being sucked in the hydrolysis tower 20 by air-introduced machine 40 negative pressure after the 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 the hydrolysis tower 20 by water circulating pump; After the atomizer atomizing, exchange with the exhaust emission mass transfer; Hydrolytic reactions, through the two-stage gas distribution-spray equipment in the hydrolysis tower 20, the waste gas after hydrolysis is handled is delivered in the oxidizing tower 50 by air-introduced machine 40 malleations after discharging moisture through gas-liquid separator 30 gas-water separation; Air-introduced machine 40 places after the gas-liquid separator 30, and main cause has two: the one, and industrial organic exhaust gas has certain corrosivity and adopts the negative pressure inlet mode to avoid blower fan is formed corrosion; The 2nd, save and take up an area of, reduce the pipeline investment.
Also the structure with water scrubber 10 is identical basically for the structure of oxidizing tower 50, and its difference only is that the air inlet mouth of pipe of oxidizing tower adopts the inverted concave arrangement, has promptly formed the inverted concave air inlet mouth of pipe 6, and is as shown in Figure 2; Hypochlorous sodium solution is as oxidation liquid, and oxidation liquid is promoted to the spray equipment place in the oxidizing tower 50 by water circulating pump, after the atomizer atomizing, with the exchange of exhaust emission mass transfer, redox reaction takes place; Carrying out redox reaction through the two-stage gas distribution-spray equipment in the oxidizing tower 50 handles;
Waste gas reaches " discharge standard of air pollutants " through above-mentioned washing absorption-hydrolysis-oxidation tertiary treatment and (GB16297-1996) is disposed to the high-altitude after be positioned at the chimney 60 at oxidizing tower 50 tops.
The present invention adopts the group technology of washing absorption-hydrolysis-oxidation to substitute traditional absorption technique or absorbing process, has solved absorbent and has been prone to poison and easy secondary pollution problem, and it is saturated easily also to have solved adsorbent simultaneously, needs problems such as regeneration.
Water scrubber 10, hydrolysis tower 20 and the spray liquid of oxidizing tower 50 are deposited to the corresponding circulating water pool that is connected with tower among the present invention, utilize water circulating pump to promote and recycle, and when concentration is low, can replenish the part medicament.Preferably regularly (first quarter or half a year) is measured the circulation fluid in circulating water pool 1, circulating water pool 2 and the circulating water pool 3; When pollutant levels COD is higher than 3000mg/L; Discharge a small amount of part circulation fluid to sewage disposal system, and in circulating water pool, replenish the part circulation fluid to guarantee the concentration of circulation fluid.
Below in conjunction with device further explain washing absorption-hydrolysis-oxidation tertiary treatment technology and principle thereof of the present invention.
1. spark arrester 1: organic exhaust gas at first passes through fire-retardant filtration before getting into the hydrolysis oxidation device among the present invention, prevents the propagation of flame between equipment, simultaneously slightly dedusting and 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 the water scrubber 10.Waste gas flows after reducing flow velocity through air inlet from bottom to top; Evenly contact with the spray liquid that has been atomized the back through the Pall ring gas distribution again; Miscible through gas-liquid two-phase, tentatively reduce waste gas organic contamination substrate concentration, finally get in the hydrolysis tower 20 through demister 5 demists.Wherein, waste gas inlet adopts downward-sloping 45 ° of otch form of tubes, has formed 45 ° of air inlet mouths of pipe 2, can effectively enlarge the gas distribution area of air inlet with this, reduces the 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 the 150mm-400mm, can not be blocked up, cause energy waste in order to avoid resistance is excessive, and also avoided spray liquid to form the tower wall effect simultaneously.Spray equipment is made up of shower, atomizer and support member three parts; Quantity according to atomizer in the waste gas organic contamination substrate concentration scalable spray equipment; When arranging, shower and atomizer should avoid the dead angle as far as possible; Each atomizer service area need guarantee minimum the intersection, and atomizer to distribution device peak at the same level must satisfy the service height of nozzle, is generally 1.0-1.2m.Be the gas distribution-spray equipment that adopts two-stage to arrange from bottom to top among the present invention, and the top of spray equipment is provided with demister in the second level.Demister is made up of 25-30mm Pall ring and support member, and thickness is 100mm-200mm.The spray liquid of washing absorption process adopts running water or recycle-water among the present invention, and recycles.
The cardinal principle of washing absorption technique is among the present invention: the organic solvent kind in the industrial waste gas is more; Organic solvent wherein soluble in water such as alcohols materials such as ethanol, methyl alcohol; Materials such as dioxane, oxolane, DMF, acetonitrile are also all soluble in water, and can arbitrary proportion dissolve each other, their water-soluble backs are 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 the waste gas, thereby reduces the organic contamination substrate concentration in the waste gas.
3. hydrolysis tower: the internal structure of hydrolysis tower 20 of the present invention is similar basically with water scrubber 10; Hydrolyzate adopts sodium hydroxide solution; Be promoted to spray equipment place in the hydrolysis tower by water circulating pump, after the atomizer atomizing, exchange hydrolytic reactions with the exhaust emission mass transfer.Chemical constitution and chemical property through hydrolysis change pollutant are dissolved in the alkaline solution, and reach the purpose of purifying contaminated thing.Concrete reaction equation is exemplified below:
Chlorocarbon class hydrolysis:
The oxolane hydrolysis:
The hydrolysis of ethyl acetate reaction:
N, dinethylformamide (DMF) hydrolysis:
Cardinal principle can be referring to aforesaid equation, also can be according to the kind and the concentration adjustment hydrolysis spray liquid of the organic pollution in the waste gas, and hydrolyzate can adopt a kind of in sodium hydroxide solution, dilution heat of sulfuric acid or the dilute hydrochloric acid solution.
3. gas-liquid separator 30 and air-introduced machine 40: gas-liquid separator 30 mainly is to prevent that moisture from getting in the air-introduced machine 40 among the present invention, particularly often occurs condensed water in the pipeline in winter, can separate the back through gas-liquid separator 30 and discharge.Before air-introduced machine 40 is placed on oxidizing tower 50, mainly be to prevent that air-introduced machine 40 is corroded, improve the service life of blower fan.
4. oxidizing tower 50: the internal structure of oxidizing tower 50 of the present invention and preceding two column foots are originally similar; Difference only is that waste gas is to be delivered in the oxidizing tower 50 by air-introduced machine 40 malleations; So the air inlet mouth of pipe of oxidizing tower 50 adopts the inverted concave arrangement; Thereby form inverted concave air inlet pipe mouth structure, can reduce the waste gas flow velocity with this.Oxidation liquid adopts the liquor natrii hypochloritis; Be promoted to the spray equipment place in the oxidizing tower 50 by water circulating pump, after atomizing,, redox reaction take place with the exchange of exhaust emission mass transfer; Promptly change the chemical property and the chemical constitution of pollutant, thereby reach the purpose of purifying contaminated thing.Concrete reaction equation is exemplified below:
N-butanol is oxidized to the reaction of n-butyric acie:
Toluene oxidation becomes benzoic reaction:
Cardinal principle can be referring to aforesaid equation, also can be according to the kind and the concentration adjustment oxidation spray liquid of the organic pollution in the waste gas, and oxidation liquid can adopt a kind of in liquor natrii hypochloritis, ferric chloride solution or the hydrogen peroxide solution.
Waste gas is through after the above serial purified treatment, and up to standard after smoke stack emission is to the 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 the circulating water pool; When pollutant levels COD is higher than 3000mg/L, discharges a small amount of part circulation fluid to sewage disposal system, and replenish the part circulation fluid to guarantee the concentration of circulation fluid to circulating water pool.Rule of thumb, circulating water pool is main with replenishment cycles liquid.
Development test instance: select for use from a certain chemical synthesis pharmaceuticals industry organic exhaust gas and administer engineering, implementation process of the present invention is done specifying in conjunction with accompanying drawing:
Research material: mainly contain organic pollutions such as methyl alcohol, ethanol, toluene, dioxane, oxolane, ethyl acetate in the organic exhaust gas, EGT is a normal temperature.
Comprise spark arrester 1 among the present invention, waste gas is carried out fire-retardant filtration, prevent the propagation of flame between equipment, slightly dedusting simultaneously.Differential manometer 1 is set on the pipeline of spark arrester 1, is used to predict spark arrester 1 stopping state.The outlet of spark arrester 1 connects water scrubber 10 exhaust inlet pipe mouths 2, and what the exhaust inlet pipe mouth adopted is downward-sloping 45 ° of otch form of tubes, through getting into distribution device behind 45 ° of air inlet mouths of pipe, the 2 reduction flow velocitys; Distribution device is made up of bracing or strutting arrangement and 250mm thickness Pall ring; The Pall ring diameter is 35-40mm, can improve the waste gas uniformity in the water scrubber 10 through distribution device, avoids short stream; Improve spray liquid and waste gas collision probability, improve reaction efficiency.Spray liquid after the mobile from bottom to top spray equipment with distribution device top of waste gas atomizes is miscible; Spray liquid adopts running water or plant area's recycle-water; Be promoted to the first order spray equipment 41 and second level spray equipment 42 places of water scrubber 10 by water circulating pump; Spray liquid diameter after atomizing can reach micron level, has increased the gas liquid reaction time, has guaranteed the removal efficient of organic contamination in the waste gas.Adopt the gas distribution-spray equipment of two-stage series connection in the present embodiment, after the abundant reaction through two-stage gas distribution-spray equipment, waste gas gets into the demister 5 at water scrubber 10 tops, and the moisture in the removal waste gas is after in the negative pressure suction hydrolysis tower 20.Demister 5 is that the 25-30mm Pall ring is formed with supporting by diameter, and Pall ring thickness is 150mm.The structure of hydrolysis tower is similar basically with water scrubber; Hydrolyzate adopts sodium hydroxide solution; Be promoted to the first order spray equipment 41 and second level spray equipment 42 places of hydrolysis tower 20 by water circulating pump, after nozzle atomization with the exchange of exhaust emission mass transfer, hydrolytic reactions.Chemical constitution and chemical property through hydrolysis change pollutant are dissolved in the alkaline solution, and reach the purpose of purifying contaminated thing.Gas-liquid separator 30 is set behind hydrolysis tower 20, is used for removing the moisture that waste gas contains, avoid waste gas that the air-introduced machine 40 of back is caused corrosion.Air-introduced machine 40 is introduced the waste gas negative pressure in water scrubber 10 and the hydrolysis tower 20; And malleation is sent in the oxidizing tower 50; Incomplete or the unreacted organic matter of reaction reaches discharge standard after chimney 60 high altitude discharges through the oxidation liquid oxidation in the oxidizing tower 50 in water scrubber 10 and hydrolysis tower 20.The structure of oxidizing tower and preceding two column foots are originally similar, and oxidation liquid adopts the liquor natrii hypochloritis, and liquor natrii hypochloritis's effective chlorine is considered by 10%.Oxidation liquid is promoted to first spray equipment 41 and second spray equipment, 42 places in the oxidizing tower 50 by water circulating pump, after nozzle atomization, with the exchange of exhaust emission mass transfer, oxidation reaction takes place.Change the chemical constitution and the chemical property of pollutant through oxidation reaction, thereby reach the purpose of purifying contaminated thing.For fear of the corrosion of oxidant to oxidizing tower, the inner fiberglass that adopts of oxidizing tower is anticorrosion, and the anticorrosion thickness of fiberglass is about 2mm.Spray liquid all adopts the recycle mode, in use according to actual conditions replenishment cycles liquid (comprising running water or recycle-water, sodium hydroxide solution and liquor natrii hypochloritis)., the circulation fluid concentration in the circulating water pool can discharge a small amount of part when being higher than 3000mg/L to sewage disposal system.
Although invention has been described for top combination figure; But the present invention is not limited to the above-mentioned specific embodiment, and the above-mentioned specific embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Under the situation that does not break away from aim of the present invention, can also make a lot of distortion, these all belong within the protection of the present invention.

Claims (10)

1. one kind is used for the hydrolysis oxidation device that industrial organic exhaust gas is administered, and it is characterized in that, comprises the water scrubber (10), hydrolysis tower (20), gas-liquid separator (30), air-introduced machine (40) and the oxidizing tower (50) that connect successively; In said water scrubber (10), hydrolysis tower (20) and the oxidizing tower (50) respectively from bottom to top be provided with first, second grade gas distribution-spray equipment, the top of gas distribution-spray equipment is provided with demister (5) in the second level; Said water scrubber (10) is connected with circulating water pool 1, and said hydrolysis tower (20) is connected with circulating water pool 2, and said oxidizing tower (50) is connected with circulating water pool 3; Said circulating water pool 1, circulating water pool 2 and circulating water pool 3 are provided with sewage draining exit respectively and are connected to the water inlet at water source; Said circulating water pool 2 also is connected with the hydrolysis flow container, and said circulating water pool 3 also is connected with the oxidation flow container; The upper reaches of said water scrubber (10) are provided with spark arrester (1), and said oxidizing tower (50) is provided with blowdown stack (60).
2. be used for the hydrolysis oxidation device that industrial organic exhaust gas is administered according to claim 1 is said, it is characterized in that, said circulating water pool 1, circulating water pool 2 and circulating water pool 3 are connected with water circulating pump respectively.
3. according to the said hydrolysis oxidation device that is used for industrial organic exhaust gas improvement of claim 2; It is characterized in that; All downward-sloping 45 ° of the air inlet mouth of pipe of said water scrubber (10) and hydrolysis tower (20), the air inlet mouth of pipe of said oxidizing tower (50) adopts the inverted concave arrangement.
4. according to the said hydrolysis oxidation device that is used for industrial organic exhaust gas improvement of claim 3; It is characterized in that; First, second grade gas distribution-spray equipment includes distribution device and the spray equipment that is provided with from bottom to top; Said distribution device comprises Pall ring, and said spray equipment comprises atomizer, and the distance between the distribution device peak of said atomizer and peer is 1.0-1.2m.
5. according to the said hydrolysis oxidation device that is used for industrial organic exhaust gas improvement of claim 4, it is characterized in that the inwall of said oxidizing tower (50) is provided with the fiberglass anticorrosive coat, the thickness of said fiberglass anticorrosive coat is 2mm.
6. one kind is used for the hydrolysis oxidation method that industrial organic exhaust gas is administered, and it is characterized in that, utilizes that said to be used for the be hydrolyzed step of oxidation of hydrolysis oxidation device that industrial organic exhaust gas administers following like claim 4:
Behind the waste gas process spark arrester (1); Suck in the water scrubber (10) by air-introduced machine (40) negative pressure; Waste gas flows after reducing flow velocity through 45 ° of air inlet mouths of pipe (2) from bottom to top; Meanwhile, spray liquid forms the atomizing particle that the diameter that flows reaches micron level from top to bottom after the atomizer atomizing; Waste gas evenly contacts with atomizing particle the back through the Pall ring gas distribution, and is miscible through the gas-liquid two-phase of two-stage, tentatively reduces waste gas organic contamination substrate concentration, finally passes through after the demister demist by in air-introduced machine (40) the negative pressure suction hydrolysis tower (20);
Hydrolyzate is promoted to the spray equipment in the hydrolysis tower (20) by water circulating pump; After the atomizer atomizing, exchange with the exhaust emission mass transfer; Hydrolytic reactions, the waste gas after the two-stage hydrolysis is handled are delivered in the oxidizing tower (50) by air-introduced machine (40) malleation after discharging moisture through gas-liquid separator (30);
Oxidation liquid is promoted to the spray equipment place in the oxidizing tower (50) by water circulating pump, after the atomizer atomizing, with the exchange of exhaust emission mass transfer, redox reaction takes place; Waste gas after the two-stage oxidation reduction reaction is handled reaches " discharge standard of air pollutants " (GB16297-1996), is disposed to the high-altitude through the chimney (60) that is positioned at oxidizing tower (50) top.
7. the hydrolysis oxidation method of administering according to the said pharmaceuticals industry organic exhaust gas of claim 6 is characterized in that, said hydrolyzate is selected from a kind of in sodium hydroxide solution, dilute sulfuric acid and the watery hydrochloric acid.
8. the hydrolysis oxidation method of administering according to the said pharmaceuticals industry organic exhaust gas of claim 6 is characterized in that, said oxidation liquid is selected from a kind of in liquor natrii hypochloritis, iron chloride and the hydrogen peroxide solution.
9. the hydrolysis oxidation method of administering according to the said pharmaceuticals industry organic exhaust gas of claim 6 is characterized in that, the washing spray liquid in the said water scrubber (10) is selected from a kind of in running water, recycle-water and the ethanol; Hydrolysis spray liquid in the said hydrolysis tower (20) is selected from a kind of in sodium hydroxide solution, dilute sulfuric acid and the watery hydrochloric acid; Oxidation spray liquid in the said oxidizing tower (50) is selected from a kind of in liquor natrii hypochloritis, iron chloride and the hydrogen peroxide solution.
10. the hydrolysis oxidation method of administering according to the said pharmaceuticals industry organic exhaust gas of claim 6; It is characterized in that; Regularly the circulation fluid in circulating water pool 1, circulating water pool 2 and the circulating water pool 3 is measured; When pollutant levels COD is higher than 3000mg/L, discharges a small amount of part circulation fluid to sewage disposal system, and in circulating water pool, replenish the part circulation fluid to guarantee the concentration of circulation fluid.
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CN103217016A (en) * 2013-04-09 2013-07-24 南京信息职业技术学院 Inorganic powder body material synthesis device
CN105387472A (en) * 2015-12-04 2016-03-09 赛鼎工程有限公司 Technique for combined treatment of various foul gases in 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
CN108786419A (en) * 2018-06-23 2018-11-13 台州帆环保设备科技有限公司 A variety of exhaust gas total systems
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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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103217016A (en) * 2013-04-09 2013-07-24 南京信息职业技术学院 Inorganic powder body material synthesis device
CN105387472A (en) * 2015-12-04 2016-03-09 赛鼎工程有限公司 Technique for combined treatment of various foul gases in coal chemical industry
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
CN108786419A (en) * 2018-06-23 2018-11-13 台州帆环保设备科技有限公司 A variety of exhaust gas total systems
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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