CN106552467B - A kind of processing method and processing device of butadiene-styrene rubber drying box exhaust gas - Google Patents
A kind of processing method and processing device of butadiene-styrene rubber drying box exhaust gas Download PDFInfo
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- CN106552467B CN106552467B CN201510638298.3A CN201510638298A CN106552467B CN 106552467 B CN106552467 B CN 106552467B CN 201510638298 A CN201510638298 A CN 201510638298A CN 106552467 B CN106552467 B CN 106552467B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention belongs to technical field of waste gas treatment, and in particular to a kind of processing method and processing device of butadiene-styrene rubber drying box exhaust gas.A kind of processing method of butadiene-styrene rubber drying box exhaust gas, it is the following steps are included: (a) washing cooling: butadiene-styrene rubber drying box exhaust gas enters water cooling tower from air inlet pipe, it is inversely contacted with the cooling water sprayed from top to bottom, then the recirculated water in tower bottom reservoir is sent the heat exchanger of styrene-butadiene latex after being reaction to cooling medium to cool down, and the circulation by being set in reservoir has the heat exchanger tube II of cold water further to cool down；(b) biological treatment: the exhaust gas by washing cooling enters biological filtering tower combined working, from bottom to top by biologic packing material, is discharged after inversely contacting purification with the nutrient solution sprayed from top to bottom.The problems such as the present invention overcomes face high there are micelle stickum and concentration of styrene of rubber dryness case tail gas and fluctuating range is big, temperature is high, it is ensured that the qualified discharge of exhaust gas has environmental protection and economical effects.
Description
Technical field
The invention belongs to technical field of waste gas treatment, and in particular to a kind of processing method of butadiene-styrene rubber drying box exhaust gas and
Device.
Background technique
The heated drying exhaust gas of rubber plant's emulsion polymerized styrene butadiene rubber device drying box discharge is large-minded, about 45~50 DEG C of temperature, has
Machine species are more, and pollutant component is complicated, mainly contain styrene, carbon disulfide, crumb particle, tar ingredients and water vapour
(90% or more humidity) etc..Non-methane total hydrocarbons in dry waste gas is mainly made of styrene, and concentration of styrene about 60~
750mg/m3, fluctuation of concentration amplitude is big, and styrene accounts for the ratio about 30%~95% of non-methane total hydrocarbons.Exhaust gas is because being in acid and containing
There are the impurity such as carbon disulfide, there is certain corrosivity to exhaust piping, while after heated drying exhaust gas chance cryogenic piping, broken glue
Grain, tar and other organic matters can also condense on pipeline, bring security risk, influence to produce.It is organic in the dry waste gas
Object belongs to odorant pollutant, and toxicity is big, and high altitude discharge influences ambient enviroment.
Butadiene-styrene rubber drying box tail gas is since large-minded, moisture content is big, contains sticky particle substance and styrene etc.
Non-methane total hydrocarbons fluctuation of concentration is big and never suitable treatment process.
The processing industrial applications case of general volatile organic contaminant (VOCS) is mainly divided following several:
First is that bioanalysis, i.e., will use biofilm filtration bed, pass through spray after the gas sampling containing volatile organic contaminant
Water drenching keeps biofilm surface wet, at the same by the organic pollutant in exhaust gas wash with biofilm contact, react, drop
Solution, organic matter are water and carbon dioxide, treated tail gas qualified discharge by biological decomposition.The advantages of this method is investment and place
Manage it is at low cost, the disadvantage is that organic matter dye object degradation be not thorough, if contain persistent organic pollutants, tail gas is difficult to row up to standard
It puts.There are many articles for the exhaust gas for containing styrene using Biochemical method for literature search discovery, such as Liu Zhifei was in 2007
" purifying styrene waste gases with bio-trickling filter " that " chemical industry environmental protection " is delivered, does micro-nutrients to pure benzene second with sodium nitrate
Alkene exhaust gas is handled, concentration of styrene 300-4500mg/m in exhaust gas3, styrene removal rate up to 87% or more, imitate by processing
Fruit is preferable.But high temperature is directly handled using bioanalysis, with the drying of the butadiene-styrene rubber of stickum and corrosivity acidic materials
Case tail gas is then infeasible, needs necessary pre-treatment.
Second is that heat-accumulation combustion method, the i.e. exhaust gas containing volatile organic contaminant are sent into combustion chamber, combustion chamber dress after being collected
There is heat-storing material, natural gas is sprayed into combustion chamber as combustion adjuvant, organic pollutant is burned to be decomposed into water and carbon dioxide.Such as
Article " heat accumulating type oxidation furnace the answering in processing SBS production exhaust gas that simple power, Sun Kun are published in 2014 " power-saving technology "
With ", it describes using heat-accumulation combustion method processing SBS production exhaust gas, organic pollutant complete decomposition, to organic concentration in tail gas
Variation is big adaptable, the disadvantage is that investment is big, reaction temperature is up to 700~800 DEG C, and operating cost is high, is suitble to processing high concentration
Organic exhaust gas, but the rubber dryness case vent gas treatment high for moisture content, viscosity is big, fluctuation of concentration amplitude is big, then be difficult to
It adapts to, it is necessary to have suitable pre-treatment removal stickum and moisture that can just carry out subsequent processing.It is especially combustible to have
The shortage of heat that waste gas burning generates when machine object concentration is very low requires supplementation with a large amount of day when required heat to maintain to react
Right gas is combustion-supporting, and operating cost is higher.
Third is that Production by Catalytic Combustion Process, what Wang Xin, Chen Yuxiang, Wang Xuehai, Liu Zhongsheng etc. were delivered at 2014 " chemical industry environmental protection "
" industrial application of the WSH-2 type catalyst in propylene oxide/styrene device exhaust-gas treatment " is introduced, the operation of industrialized unit
The result shows that in exhaust-gas treatment amount 86000Nm3/ h, 250~300 DEG C of reactor inlet temperatures of setting, setting import non-methane are total
1000~2200mg/m of hydrocarbon (NMHC) mass concentration3Under conditions of, treated exhaust gas can with qualified discharge, catalyst life
Up to 5 years.Production by Catalytic Combustion Process is invested equally very big than the energy conservation of heat-accumulation combustion method, and for atm number, humidity is big, toughness object
Matter, pollutant concentration fluctuate big butadiene-styrene rubber drying box exhaust-gas treatment and are then difficult to adapt to, especially the non-first in exhaust gas sometimes
Alkane total hydrocarbon concentration is less than 100mg/m3When, shortage of heat caused by oxidation operation is to maintain heat required for subsequent reactions
When, reaction is difficult to continue, and has an adverse effect to device stable operation.If the normal operation of device is maintained to need to exhaust gas
It is electrically heated, then consumes energy larger.
Fourth is that plasma oxidation method, i.e. oxygen in the case where electrion in air are decomposed into active oxygen and tail gas
Organic matter reaction, become carbon dioxide and water.Such as patent CN201010280645.7 " matrix form dielectric barrier discharge plasma
Body handles gas with foreign flavor device ", its advantage is that oxidation operation is thorough, the disadvantage is that investment is big, operating cost is high, in tail gas
Organic concentration amplitude of variation be difficult to adapt to greatly, containing the ozone of high concentration in the tail gas after oxidation reaction, bring secondary dirt
Dye problem.And it is equally faced with the stickum in tail gas and moisture and system stable operation bring is adversely affected.Using
Styrene occurs in the long run test of this method processing butadiene-styrene rubber drying box exhaust gas and polymerize attachment on the critical component of equipment
Influence the phenomenon that equipment operates normally.
Above-mentioned process butadiene-styrene rubber drying box tail gas all suffers from asking for stickum, styrene autohemagglutination and moisture
Topic, biological treatment are also faced with high temperature problem.
Summary of the invention
For in butadiene-styrene rubber drying box exhaust gas, there are micelle stickum and concentration of styrene height and fluctuating ranges
Greatly, the problems such as temperature is high, the invention proposes a kind of processing method and processing devices of butadiene-styrene rubber drying box exhaust gas, to butadiene-styrene rubber
Drying box tail gas is cooled down, removes micelle pretreatment, then uses biological treatment, it is ensured that exhaust gas qualified discharge.
A kind of processing method of butadiene-styrene rubber drying box exhaust gas comprising following steps:
(a) washing cooling: butadiene-styrene rubber drying box exhaust gas enters water cooling tower from air inlet pipe, and sprays from top to bottom
Cooling water inversely contacts, then by the recirculated water in tower bottom reservoir send to cooling medium be reaction after styrene-butadiene latex heat exchanger
Cool down, and the circulation by being set in reservoir has the heat exchanger tube II of cold water further to cool down；
(b) biological treatment: the exhaust gas by washing cooling enters biological filtering tower combined working, from bottom to top by biologic packing material, with from
The nutrient solution of upper and lower spray is discharged after inversely contacting purification.
Wherein, in step (a) to shower water take 2 cooling advantages be the lotion after reaction can both have been carried out it is pre-
Heat, reduces the energy consumption of lotion recycling butadiene, and saves the energy consumption of spray liquid cooling.Spray mode is taken to carry out exhaust gas
Cool down (being reduced to 38 DEG C or less), the steam that exhaust gas can be carried secretly removes a part, reduces gas gross, and quantity of circulating water increases
Add, extra water is overflowed outside tower.Meanwhile the sticky micelle that shower water carries exhaust gas secretly removes, micelle is bubbled through the water column, is arranged with water
Out outside tower.In step (b) after biological treatment, the non-methane hydrocarbon organic pollutant in exhaust gas is by the life on biologic packing material surface
Object film, moisture film absorption and sorption, and be degraded by microorganisms.
The temperature of step (a) the butadiene-styrene rubber drying box exhaust gas is 45-50 DEG C, and the temperature of spraying cooling water is 20-25
DEG C, the cold water in the heat exchanger tube II is obtained by refrigeration mechanism, and temperature is 4-5 DEG C.
Styrene-butadiene latex in step (a) after heating, which send to butadiene extraction device to reheat, recycles unreacted butadiene.
Micelle and extra moisture in step (a) reservoir overflow outside tower from discharging of waste liquid pipe, send sewage treatment
Field is further processed.
Biologic packing material described in step (b) uses diameter for 3~5 millimeters of haydite, and its surface apposition growth microorganism
Film.
Nutrient solution described in step (b) is mixed by ammonium hydrogen carbonate, disodium hydrogen phosphate, sodium acetate, and three kinds of salt are alkali
Property, wherein disodium hydrogen phosphate and ammonium hydrogen carbonate mainly provide nitrogen P elements required for microbial degradation organic matter, and sodium acetate
Then it is co-substrate, is conducive to the activity for improving microorganism, improves the efficiency of microbial degradation styrene.Using three kinds of alkaline matters
The purpose for being made into nutrient solution is to improve biologic packing material surface moisture film to the effect of absorption, the retention of the organic matters such as exhaust gas middle acid substance
Rate, moisture film are higher to the efficiency of rejection to organics, higher to the removal efficiency of the organic matters such as styrene.
The nutrient solution sprayed in step (b) falls into the pond that stores of tower bottom after biologic packing material, and by communicating therewith
Compounding tank Additional nutrient solution.
Preferably, ammonium hydrogen carbonate in compounding tank, disodium hydrogen phosphate, sodium acetate mass concentration ratio be
2.5%:0.01%:0.2%.
Generated waste and extra moisture send dirt outside overflow pipe discharge tower in bioprocesses in step (b)
Large Water Treatment Field is further processed.
A kind of device for realizing the butadiene-styrene rubber drying box waste gas processing method comprising water cooling tower and biological filter
Tower, the water cooling tower are connected to by the waste gas delivery pipeline of tower top with biological filtering tower combined working, and the water cooling tower tower bottom is provided with
Reservoir is connected with heat exchanger by circulating pump, and in reservoir be equipped with heat exchanger tube II, tower top be equipped with by circulating pump with
The spray nozzle I of reservoir connection；The biological filtering tower combined working tower bottom, which is provided with, stores pond, passes through circulating pump and the spray for being set to tower top
It drenches mouth II to be connected to, and is connected by nutrition pipeline with compounding tank.
Compared with prior art, the present invention achieves following effect:
(1) it overcomes existing treatment process and is difficult to adapt to the viscosity of micelle in butadiene-styrene rubber drying box exhaust gas, styrene appearance
Easily polymerization forms that stickum makes processing equipment be difficult to operate normally and concentration of styrene fluctuating range is big, processing equipment is difficult to
The shortcomings that adaptation, treatment effect are difficult to ensure, it is ensured that exhaust gas qualified discharge.
(2) the characteristics of lotion low temperature, cools down indirectly to drying box exhaust gas after making full use of butadiene-styrene rubber to polymerize, and both goes
It is preheated in addition to moisture in exhaust gas, and to lotion, saves the energy of lotion subsequent processing, have environmental protection and economy dual
Benefit.
(3) high temperature and sticky micelle of exhaust gas must be solved the problems, such as using Biochemical method drying box exhaust gas, if using
Conventional cooling measure is then invested and huge energy consumption.In butadiene-styrene rubber production process, the low temperature styrene-butadiene latex after reaction needs to add
Heat is to removing unreacted butadiene after 50 DEG C, and the present invention cools down to exhaust gas using the styrene-butadiene latex of low temperature, while right
Styrene-butadiene latex is preheated, and saves energy to exhaust gas cooling than using refrigeration machine to produce cold water completely.
Detailed description of the invention
Fig. 1 is the processing method and processing device schematic diagram of butadiene-styrene rubber drying box exhaust gas of the present invention.
Appended drawing reference as shown in the figure: 1- styrene-butadiene latex enters pipe；2- heat exchanger；3- heat exchanger tube I；The outlet of 4- styrene-butadiene latex
Pipe；5- circulating water pipe I；6- cold water pipe；7- heat exchanger tube II；8- hot-water line；9- air inlet pipe；10- water cooling tower；11- recirculated water
Pipe II；12- spray nozzle I；13- reservoir；14- discharging of waste liquid pipe；15- waste gas delivery pipeline；16- biological filtering tower combined working；17- biology is filled out
Material；18- stores pond；19- nutrient solution circulation pipe；20- spray nozzle II；21- compounding tank；22- nutrition pipeline；23-
Purified exhaust gas evacuation pipe；24- overflow pipe.
Specific embodiment
The present invention will be further described in the following with reference to the drawings and specific embodiments:
A kind of butadiene-styrene rubber drying box emission-control equipment, as shown in Figure 1 comprising water cooling tower 10 and biological filtering tower combined working
16, the water cooling tower 10 is connected to by the waste gas delivery pipeline 15 of tower top with biological filtering tower combined working 16,10 tower of water cooling tower
Bottom is provided with reservoir 13, is connected with heat exchanger 2 by circulating pump, and heat exchanger tube II 7 is equipped in reservoir 13, tower top peace
Equipped with the spray nozzle I 12 being connect by circulating pump with reservoir 13；16 tower bottom of biological filtering tower combined working, which is provided with, stores pond 18,
It is connected to by circulating pump with the spray nozzle II 20 for being set to tower top, and passes through nutrition pipeline 22 and compounding tank 21
It is connected.
Below according to described above, selecting typical industry VOC is to deal with objects, and carries out specific implementation explanation:
Embodiment 1
200,000 m of butadiene-styrene rubber drying box exhaust gas3/ h, temperature 50 C, humidity 95%, non-methane total hydrocarbons content 800mg/m3, press
Fig. 1 process is handled.Butadiene-styrene rubber drying box exhaust gas conveys power and comes from air blower, through air inlet pipe 9 from water cooling tower 10
Middle part enters, and promotes 25 DEG C of cooling water pressurization through circulating water pipe II 11 using circulating pump and send to top of tower, passes through spray nozzle
I 12 spray downwards from top, and exhaust gas temperature is down to 38 DEG C, the 13 reservoir storage 300m of reservoir of 10 tower bottom of water cooling tower3, cold
But the internal circulating load 5000m of water3/h.180,000 m of exhausted air quantity after cooling3/ h, quantity of circulating water increases 9m after steam becomes condensed water3/ h,
The extra water in this part and the micelle for droping to pool surface with shower water are sent at sewage outside the spilling tower of discharging of waste liquid pipe 14
Manage field cesspool.44 DEG C of spray water temperature after heat exchange needs to maintain the temperature of recirculated water at 20-25 DEG C by recirculated water
Heat is swapped out.1000m is extracted from 10 tower bottom reservoir of water cooling tower, 13 top first3The recirculated water of/h is through circulating water pipe
I 5 send into the heat exchanger tube I 3 of heat exchanger 2, with the styrene-butadiene latex after the reacting of enter that pipe 1 enters by styrene-butadiene latex 5 DEG C into
Row heat exchange.The flow of latex is 150m3/h.The temperature of latex increases 10 DEG C after heat exchange, and circulating water temperature reduces by 5 DEG C and passes through pipeline
The top for returning to reservoir 13, the latex after heating send butadiene extraction device to reheat recycling not through styrene-butadiene latex outlet 4
The monomer butadiene of reaction.The cold water that 5 DEG C are produced using refrigeration machine, through cold water pipe 6 with 400m3The flow of/h enters reservoir 13
Circulating water temperature is further reduced to 25 DEG C by bottom heat exchanger tube II 7, and circulated sprinkling is exhaust gas cooling, temperature of cold water rises to 15
DEG C, cryocooled is sent back to from the discharge of hot-water line 8 recycles to 5 DEG C.About 180,000 m of exhaust gas after cooling3/ h, conveys through exhaust gas
Pipe 15 is averagely into the biological filtering tower combined working of 5 12 meters of 10 х of Φ, 16 middle part.Exhaust gas passes through biologic packing material 17 from bottom to top, and packing layer has
5 meters of effect height, filler uses about 3~5 millimeters of diameter of haydite, haydite surface apposition growth microbial film, weakly alkaline nutrition
Liquid is sprayed from top to bottom by spray nozzle II 20, spray liquid internal circulating load 5000m3/ h is (using circulating pump through nutrient solution circulation pipe 19
Nutrient solution pressurization is promoted and is sent to top of tower), it is inversely contacted with exhaust gas in biologic packing material layer, spray liquid is fallen into after packing layer
The nutrient solution of tower bottom stores pond 18, and storing pond 18 is 5 meters of 10 х of Φ, volume 390m3.Styrene in exhaust gas and other non-
Methane total hydrocarbons organic pollutant is trapped, absorbs, and the absorption of biomembrane object, the degradation grown on filler.Alkalescent nutrition
Liquid is conducive to the neutralization of the acidic materials in exhaust gas, absorbs, and keeps the liquid film of biofilm surface to maintain neutral meta-alkali environment, has
Activity is maintained conducive to microorganism.Non-methane total hydrocarbons is less than 50mg/L in tail gas after biological treatment, is arranged by purified exhaust gas
23 qualified discharge of blank pipe.16 bottom of biological filtering tower combined working is maintained to store ammonia nitrogen concentration 20mg/L in pond 18, total phosphorus 1mg/L stablizes, periodically
The concentrating of nutrients in nutrient solution is detected, passes through metering pump if being lower than setting value through nutrition pipeline 22 from nutrient solution
Preparing tank 21 extracts dope and is supplemented.Ammonium hydrogen carbonate 2.5% in compounding tank 21, disodium hydrogen phosphate 0.01%, acetic acid
Sodium 0.2% (mass percent).Generated waste such as biofilm detachment is formed by biological relic, more in bioprocesses
Remaining moisture etc. is discharged outside tower from overflow pipe 24, and sewage farm is sent to be further processed.
Embodiment 2
180,000 m of butadiene-styrene rubber drying box exhaust gas3/ h, temperature 45 C, humidity 90%, non-methane total hydrocarbons content 400mg/m3, press
Fig. 1 process is handled.Butadiene-styrene rubber drying box exhaust gas conveys power and comes from air blower, through air inlet pipe 9 from water cooling tower 10
Middle part enters, and promotes 25 DEG C of cooling water pressurization through circulating water pipe II 11 using circulating pump and send to top of tower, passes through spray nozzle
I 12 spray downwards from top, and exhaust gas temperature is down to 36 DEG C, the 13 reservoir storage 300m of reservoir of 10 tower bottom of water cooling tower3, cold
But the internal circulating load 4000m of water3/h.About 170,000 m of exhausted air quantity after cooling3/ h, quantity of circulating water increase is about after steam becomes condensed water
7m3/ h, the extra water in this part and the micelle for droping to pool surface with shower water are sent outside the spilling tower of discharging of waste liquid pipe 14
Sewage farm cesspool.40 DEG C of spray water temperature after heat exchange needs to follow to maintain the temperature of recirculated water at 20-25 DEG C
The heat of ring water is swapped out.1000m is extracted from 10 tower bottom reservoir of water cooling tower, 13 top first3The recirculated water of/h is through following
Ring water pipe I 5 is sent into the heat exchanger tube I 3 of heat exchanger 2, with the butylbenzene after the reacting of enter that pipe 1 enters by styrene-butadiene latex 5 DEG C
Latex exchanges heat.The flow of latex is 130m3/h.The temperature of latex increases 10 DEG C after heat exchange, and circulating water temperature reduces by 5.5 DEG C
The top that reservoir 13 is returned to by pipeline, the latex after heating send butadiene extraction device to add again through styrene-butadiene latex outlet 4
The unreacted monomer butadiene of recuperation of heat.The cold water that 5 DEG C are produced using refrigeration machine, through cold water pipe 6 with 250m3The flow of/h enters
Circulating water temperature is further reduced to 25 DEG C by 13 bottom heat exchanger tube II 7 of reservoir, and circulated sprinkling is exhaust gas cooling, cold water liter
Temperature is sent cryocooled back to from the discharge of hot-water line 8 and is recycled to 5 DEG C to 15 DEG C.About 170,000 m of exhaust gas after cooling3/ h, through useless
Letter shoot 15 is averagely into the biological filtering tower combined working of 5 12 meters of 10 х of Φ, 16 middle part.Exhaust gas passes through biologic packing material 17 from bottom to top, fills out
5 meters of bed of material effective height, filler uses about 3~5 millimeters of diameter of haydite, haydite surface apposition growth microbial film, alkalescent
Nutrient solution sprayed from top to bottom by spray nozzle II 20, spray liquid internal circulating load 3000m3/ h (is followed using circulating pump through nutrient solution
Nutrient solution pressurization is promoted and is sent to top of tower by endless tube 19), it is inversely contacted with exhaust gas in biologic packing material layer, spray liquid passes through packing layer
The nutrient solution for falling into tower bottom afterwards stores pond 18, and storing pond 18 is 5 meters of 10 х of Φ, volume 390m3.Styrene in exhaust gas and
Other non-methane total hydrocarbons class organic pollutants are trapped, absorb, and the absorption of biomembrane object, the degradation grown on filler.Weak base
Property nutrient solution be conducive to the acidic materials in exhaust gas neutralization, absorb, keep the liquid film of biofilm surface to maintain neutral meta-alkali
Environment is conducive to microorganism and maintains activity.Non-methane total hydrocarbons is less than 50mg/L in tail gas after biological treatment, by purified
23 qualified discharge of exhaust gas evacuation pipe.16 bottom of biological filtering tower combined working is maintained to store ammonia nitrogen concentration 20mg/L in pond 18, total phosphorus 1mg/L is steady
Fixed, the nutrient concentrations in nutrient solution decline 10% because biological respinse consumes, then by metering pump through nutrition pipeline
22, which extract dope from compounding tank 21, is supplemented.Ammonium hydrogen carbonate 2.5%, disodium hydrogen phosphate in compounding tank 21
0.01%, sodium acetate 0.2% (mass percent).Generated waste such as biofilm detachment is formed by bioprocesses
Biological relic, extra moisture etc. are discharged outside tower from overflow pipe 24, and sewage farm is sent to be further processed.
Embodiment 3
180,000 m of butadiene-styrene rubber drying box exhaust gas3/ h, temperature 45 C, humidity 90%, non-methane total hydrocarbons content 60mg/m3, press
Fig. 1 process is handled.Butadiene-styrene rubber drying box exhaust gas conveys power and comes from air blower, through air inlet pipe 9 from water cooling tower 10
Middle part enters, and promotes 25 DEG C of cooling water pressurization through circulating water pipe II 11 using circulating pump and send to top of tower, passes through spray nozzle
I 12 spray downwards from top, and exhaust gas temperature is down to 36 DEG C, the 13 reservoir storage 300m of reservoir of 10 tower bottom of water cooling tower3, cold
But the internal circulating load 4000m of water3/h.About 170,000 m of exhausted air quantity after cooling3/ h, quantity of circulating water increase is about after steam becomes condensed water
7m3/ h, the extra water in this part and the micelle for droping to pool surface with shower water are sent outside the spilling tower of discharging of waste liquid pipe 14
Sewage farm cesspool.40 DEG C of spray water temperature after heat exchange needs to follow to maintain the temperature of recirculated water at 20-25 DEG C
The heat of ring water is swapped out.1000m is extracted from 10 tower bottom reservoir of water cooling tower, 13 top first3The recirculated water of/h is through following
Ring water pipe I 5 is sent into the heat exchanger tube I 3 of heat exchanger 2, with the butylbenzene after the reacting of enter that pipe 1 enters by styrene-butadiene latex 5 DEG C
Latex exchanges heat.The flow of latex is 130m3/h.The temperature of latex increases 10 DEG C after heat exchange, and circulating water temperature reduces by 5.5 DEG C
The top that reservoir 13 is returned to by pipeline, the latex after heating send butadiene extraction device to add again through styrene-butadiene latex outlet 4
The unreacted monomer butadiene of recuperation of heat.The cold water that 5 DEG C are produced using refrigeration machine, through cold water pipe 6 with 250m3The flow of/h enters
Circulating water temperature is further reduced to 25 DEG C by 13 bottom heat exchanger tube II 7 of reservoir, and circulated sprinkling is exhaust gas cooling, cold water liter
Temperature is sent cryocooled back to from the discharge of hot-water line 8 and is recycled to 5 DEG C to 15 DEG C.About 170,000 m of exhaust gas after cooling3/ h, through useless
Letter shoot 15 is averagely into the biological filtering tower combined working of 5 12 meters of 10 х of Φ, 16 middle part.Exhaust gas passes through biologic packing material 17 from bottom to top, fills out
5 meters of bed of material effective height, filler uses about 3~5 millimeters of diameter of haydite, haydite surface apposition growth microbial film, alkalescent
Nutrient solution sprayed from top to bottom by spray nozzle II 20, spray liquid internal circulating load 2500m3/ h (is followed using circulating pump through nutrient solution
Nutrient solution pressurization is promoted and is sent to top of tower by endless tube 19), it is inversely contacted with exhaust gas in biologic packing material layer, spray liquid passes through packing layer
The nutrient solution for falling into tower bottom afterwards stores pond 18, and storing pond 18 is 5 meters of 10 х of Φ, volume 390m3.Styrene in exhaust gas and
Other non-methane total hydrocarbons class organic pollutants are trapped, absorb, and the absorption of biomembrane object, the degradation grown on filler.Weak base
Property nutrient solution be conducive to the acidic materials in exhaust gas neutralization, absorb, keep the liquid film of biofilm surface to maintain neutral meta-alkali
Environment is conducive to microorganism and maintains activity.Non-methane total hydrocarbons is less than 50mg/L in tail gas after biological treatment, by purified
23 qualified discharge of exhaust gas evacuation pipe.16 bottom of biological filtering tower combined working is maintained to store ammonia nitrogen concentration 10mg/L in pond 18, total phosphorus 0.5mg/L is steady
Fixed, the nutrient concentrations in nutrient solution decline 10% because biological respinse consumes, then by metering pump through nutrition pipeline
22, which extract dope from compounding tank 21, is supplemented.Ammonium hydrogen carbonate 2.5%, disodium hydrogen phosphate in compounding tank 21
0.01%, sodium acetate 0.2% (mass percent).Generated waste such as biofilm detachment is formed by bioprocesses
Biological relic, extra moisture etc. are discharged outside tower from overflow pipe 24, and sewage farm is sent to be further processed.
Claims (7)
1. a kind of processing method of butadiene-styrene rubber drying box exhaust gas, which comprises the following steps:
(a) washing cooling: butadiene-styrene rubber drying box exhaust gas enters water cooling tower (10) from air inlet pipe (9), and sprays from top to bottom
The cooling water of leaching inversely contacts, and then sending the recirculated water in tower bottom reservoir (13) to cooling medium is styrene-butadiene latex after reaction
Heat exchanger (2) cool down, and the circulation by being set in reservoir (13) have cold water heat exchanger tube II (7) further drop
Temperature；
(b) biological treatment: the exhaust gas by washing cooling enters biological filtering tower combined working (16), passes through biologic packing material (17) from bottom to top,
It is discharged after inversely contacting purification with the nutrient solution sprayed from top to bottom；
The temperature of step (a) the butadiene-styrene rubber drying box exhaust gas is 45-50 DEG C, and the temperature of spraying cooling water is 20-25 DEG C, institute
The cold water stated in heat exchanger tube II (7) is obtained by refrigeration mechanism, and temperature is 4-5 DEG C；
Styrene-butadiene latex in step (a) after heating, which send to butadiene extraction device to reheat, recycles unreacted butadiene；
Micelle and extra moisture in step (a) reservoir (13) overflow outside tower from discharging of waste liquid pipe (14), send sewage
Treatment stations are further processed.
2. the processing method of butadiene-styrene rubber drying box exhaust gas according to claim 1, which is characterized in that described in step (b)
Biologic packing material uses diameter for 3~5 millimeters of haydite, and its surface apposition growth microbial film.
3. the processing method of butadiene-styrene rubber drying box exhaust gas according to claim 1, which is characterized in that described in step (b)
Nutrient solution is mixed by ammonium hydrogen carbonate, disodium hydrogen phosphate, sodium acetate.
4. the processing method of butadiene-styrene rubber drying box exhaust gas according to claim 1, which is characterized in that spray in step (b)
Nutrient solution fall into storing pond (18) for tower bottom after biologic packing material (17), and the compounding tank by communicating therewith
(21) Additional nutrient solution.
5. the processing method of butadiene-styrene rubber drying box exhaust gas according to claim 4, which is characterized in that compounding tank
(21) ammonium hydrogen carbonate in, disodium hydrogen phosphate, sodium acetate mass percent be 2.5%:0.01%:0.2%.
6. the processing method of butadiene-styrene rubber drying box exhaust gas according to claim 1, which is characterized in that biological in step (b)
Generated waste and extra moisture send sewage farm further to locate outside overflow pipe (24) discharge tower in reaction process
Reason.
7. a kind of device for realizing butadiene-styrene rubber drying box waste gas processing method described in claim 1-6 any one, feature
It is, including water cooling tower (10) and biological filtering tower combined working (16), the waste gas delivery pipeline that the water cooling tower (10) passes through tower top
(15) it is connected to biological filtering tower combined working (16), water cooling tower (10) tower bottom is provided with reservoir (13), is connected by circulating pump
It is connected to heat exchanger (2), and is equipped with heat exchanger tube II (7) in reservoir (13), tower top is equipped with through circulating pump and reservoir (13)
The spray nozzle I (12) of connection；Biological filtering tower combined working (16) tower bottom, which is provided with, stores pond (18), by circulating pump and is set to tower
The spray nozzle II (20) on top is connected to, and is connected by nutrition pipeline (22) with compounding tank (21).
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