CN106039938A - Recovery method and device for tail gas in vinegar production - Google Patents
Recovery method and device for tail gas in vinegar production Download PDFInfo
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- CN106039938A CN106039938A CN201610538775.3A CN201610538775A CN106039938A CN 106039938 A CN106039938 A CN 106039938A CN 201610538775 A CN201610538775 A CN 201610538775A CN 106039938 A CN106039938 A CN 106039938A
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- tail gas
- spray
- absorption
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- absorbing liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1406—Multiple stage absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0275—Other waste gases from food processing plants or kitchens
Abstract
The invention relates to a recovery method for tail gas in vinegar production. The method includes the steps of directly introducing tail gas of a production fermentation tank into a first-stage absorption tower, absorbing organic components in the tail gas through a second-stage absorption tower, adjusting and controlling the supplementation time and supplementation amount of new water by monitoring the pH value of absorption liquid, sufficiently recovering the tail gas by spraying the new water at the last stage, absorbing the tail gas through an active carbon layer in a demist tower, and conducting direct emission when the direct emission standard regulated by nation is reached. By means of the method, thorough treatment and comprehensive recovery and reutilization of vinegar production tail gas are achieved, and the method has the advantages of being low in energy consumption, easy to control, low in running cost and good in tail gas treatment and recovery effect. In addition, the invention further provides a recovery device which is more beneficial to operation and running control of the recovery method and beneficial to treatment and recycle of the vinegar production tail gas.
Description
Technical field
The present invention relates to tail gas recycle technical field, particularly relate to the recovery method of tail gas during a kind of vinegar produces, meanwhile,
Further relate to the retracting device for this recovery method.
Background technology
The liquid fermentation production process of vinegar, owing to ventilation is big, fermentation temperature is higher, often results in bulk fermentation product second
Acid, fermentation raw material thing ethanol and intermediate product volatile flavor substance are discharged from tail gas, and environment not only causes greatly pollution,
And cause the biggest waste for producing, therefore, during Vinegar Fermentation produces, tail gas need to recycle, and makes absorbing liquid be back to
Produce, reduce production cost, avoid waste while, reduce pollute.
Chinese patent ZL201210339141.7 discloses a kind of method that during vinegar produces, tail gas recycle utilizes, and is used for leading
Ethanol in Vinegar Fermentation to be reclaimed, is to absorb via exhaust collection liquefaction to resolve condensing reflux recycling etc.
Reason, it is achieved the recycling of tail gas, but there is condensation at low temperature in the method, high temperature resolves homenergic operation and technique is irrational scarce
Point.Chinese patent ZL201310131041.X discloses the method for work of a kind of vinegar liquid fermentation device, adopts producing tail gas
By the multiple techniques of cooling cyclic absorption microfiltration backflow fermentation, reclaim the ethanol in fermentation tail gas, ethyl acetate, lactic acid
Ethyl ester etc., but the method still needs to carry out cooling down and the energy operation of supercharging, and using ethanol content in absorbing liquid as recovery index,
There is tail gas absorption unstable, the irrational problem of technique.It addition, along with country's enhancing to environmental consciousness, administer at air
Aspect strict regulations gas discharge standard, it is desirable to gas discharge need to meet that " industrial undertaking's Volatile organic emissions controls mark
Accurate " (DB13/2322-2016), and the most thorough to the process of tail gas in above-mentioned patented technology, it is impossible to reach national regulation
Directly discharge standard.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides the recovery method of tail gas during a kind of vinegar produces,
Using under conditions of lowest energy consumption, reclaiming tail gas and be used for producing recycling, and making the tail gas after process reach directly to discharge mark
Accurate.
For achieving the above object, the recovery method of tail gas in the vinegar production of the present invention, comprise the following steps:
A, first order absorption: tail gas is passed through first grade absorption tower, via two-stage can the spray equipment of spray-absorption liquid, with absorbing liquid
Reverse contact, carries out first order absorption；
B, two grades of absorptions: the tail gas after first order absorption is passed through two-level absorption tower, first can spray-absorption liquid via one-level
Spray equipment, inversely contacts with absorbing liquid, then via one-level can the spray equipment of spray-absorption liquid and water, with absorbing liquid or suction
Receive liquid with watery vomiting to contacting, carry out two grades of absorptions；
In described first grade absorption tower, the absorbing liquid of spray is identical, for being absorbed by water with the absorbing liquid of spray in two-level absorption tower
The liquid of circulated sprinkling is continued after tail gas；Tail gas absorption process monitoring absorbing liquid pH value, when absorbing liquid pH value is higher than 4.5, described
Spray-absorption liquid controls spray-absorption liquid with the spray equipment of water；When absorbing liquid pH value is not higher than 4.5, described spray-absorption liquid with
The spray equipment of water controls spray-absorption liquid and water, and controls the spray flux of water to maintain absorbing liquid pH value to be not less than 3；Work as absorption
Liquid pH value is 3～4.5, and discharge unit absorbing liquid is back to produce；
C, discharge: the tail gas after two grades absorb is passed through deentrainment tower, via the absorption of active carbon layer, directly discharges.
The recovery method of the present invention, is that the tail gas producing fermentation tank is passed directly into first grade absorption tower, more successively via two
Discharge after the process of level absorption tower and deentrainment tower, utilize the tail gas overbottom pressure of fermentation tank, enable tail gas to be certainly advanced into two-stage and absorb
Tower and the bottom of deentrainment tower, discharge from top the most again, is not required to the dissipative operation such as cooling, supercharging, reduces tail gas absorption mistake
Journey energy consumption.In the process on two-stage absorption tower, tail gas is introduced into first grade absorption tower, inverse with the absorbing liquid of two-stage spray from bottom to top
Carrying out absorption process to contact, enter back into two-level absorption tower, the absorbing liquid first sprayed with one-level from bottom to top inversely contacts and carries out
Absorption processes, then carries out absorption process with the absorbing liquid of one-level spray or absorbing liquid and watery vomiting to contacting, the institute wherein sprayed
Absorbing liquid is had to be the same liquid of circulating pump input, for continuing the liquid of circulated sprinkling, absorption process after being absorbed tail gas by water
By controlling the pH value of absorbing liquid, the absorption of tail gas is regulated and controled, when absorbing liquid pH value is higher than 4.5, and absorbing liquid now has
Enough tail gas absorption abilities, are not required to supplement new water, and the most described spray-absorption liquid controls only to spray suction with the spray equipment of water
Receive liquid, and absorbing liquid now is few owing to absorbing the main matter acetic acid amount in tail gas, it is impossible to be used for producing reuse, so inhaling
Receive liquid and do not drain back into use；When absorbing liquid pH value is not higher than 4.5, now require supplementation with new water and carry out tail gas is fully absorbed,
The most described spray-absorption liquid controls spray-absorption liquid and water, the side that new water sprays simultaneously with afterbody with the spray equipment of water
Formula carries out last efficient absorption to tail gas, reaches absorption, emission request, and the magnitude of recruitment controlling new water maintains the pH of absorbing liquid
Value can not be less than 3, it is to avoid it is incomplete to tail gas absorption that absorption liquid pH causes less than 3, the problem affecting exhaust emissions；Absorbing
When liquid pH value is 3～4.5, in absorbing liquid, the amount of acetic acid reaches the requirement that can be back to produce, and now absorbing liquid can be carried out portion
Dividing drains back into for producing, it is achieved the continuous processing to tail gas.In absorption process by the monitoring of absorbing liquid pH value, regulation and control,
The abundant recovery to organic components such as acetic acid, ethanol, ethyl acetate in tail gas can be realized, the Vapor recovery unit of tail gas can be made again,
Ensure the treatment effect absorbed, do not affect the quality of exhaust emissions.After two-stage absorption tower processes, tail gas finally enters except mist
Tower, active carbon layer, after absorbing very small amount VOC remained in tail gas, reach the direct discharge standard of national regulation, can be direct
Discharge, thus thoroughly improvement and comprehensive recycling of tail gas in realizing vinegar is produced.Therefore, the tail gas recycle of the present invention
Method, has energy consumption low, and manipulation is simple, and operating cost is low, the advantage that vent gas treatment, recovering effect are good.
As the restriction to aforesaid way, described spray-absorption liquid and the spray position of water in the spray equipment of water are higher than inhaling
Receive the spray position of liquid.
As the restriction to aforesaid way, described in step a, b, c, the empty tower gas velocity of tail gas is 0.2-0.5m/s.
As the restriction to aforesaid way, the gas liquid ratio on described two-stage absorption tower is 50:1-100:1.
As the restriction to aforesaid way, in described two-stage absorption tower, the spray flow of each spray equipment is 300-700L/
h。
Limit the operating parameter in recovery method further, such as water and the spray position of absorbing liquid, spray in spray equipment
The parameters such as the spray flux of device and the empty tower gas velocity of tail gas, gas liquid ratio, make recovery method that the process of tail gas to reach optimum
Recovery, treatment effect.
Meanwhile, present invention also offers the retracting device of tail gas during a kind of vinegar produces, inhale including the one-level being arranged in series
Receive tower, two-level absorption tower and deentrainment tower,
Described first grade absorption tower includes the first tower body, is formed with the first hydroecium in the bottom of described first tower body, described
The top of the first hydroecium and the top of the first tower body are respectively equipped with the first air inlet and the first gas outlet, in described first tower body
Spaced apart two-layer the first spray equipment, described first spray dress it is provided with between described first air inlet and the first gas outlet
Put and include the first packing layer, and be positioned at the first spray head above described first packing layer, the import of described first spray head
It is communicated to described first hydroecium via circulating pump, is provided with overflow pipe in the side of described first hydroecium, in described overflow pipe and institute
The connecting pipeline stating the first hydroecium is provided with pH detector unit；
Described two-level absorption tower includes the second tower body, is formed with the second hydroecium in the bottom of described second tower body, described
The top of the second hydroecium and the top of the second tower body are respectively equipped with the second air inlet and the second gas outlet, in described second tower body
Spaced apart two-layer the second spray equipment, described second spray dress it is provided with between described second air inlet and the second gas outlet
Put and include the second packing layer, and be positioned at the second spray head above described second packing layer, the import of described second spray head
Being communicated to described circulating pump, described second hydroecium is communicated in the first hydroecium, in described in described second spray equipment on upper strata
The moisturizing spray head being also arranged above being connected with external water source of the second packing layer, at the inlet pipeline of described moisturizing spray head
On be serially connected with and the described joining electromagnetic valve of pH detector unit；
Described deentrainment tower includes the 3rd tower body, be respectively equipped with in the bottom of described 3rd tower body and top the 3rd air inlet and
3rd gas outlet, is provided with activated carbon adsorption layer in described 3rd tower body between described 3rd air inlet and the 3rd gas outlet.
As the second spray head interlaced arrangement of the restriction to aforesaid way, described moisturizing spray head and its side, described
The position of moisturizing spray head is higher than the position of described second spray head of its side.
As the restriction to aforesaid way, the height of the overfall of described overflow pipe is 500mm.
As the restriction to aforesaid way, the spray of described first spray head, the second spray head and moisturizing spray head covers
Area is 0.5.
The retracting device that the present invention provides is more conducive to the operation of above-mentioned recovery method and runs control, conveniently and efficiently real
The recovery of tail gas, process in now vinegar being produced.By first grade absorption tower the first hydroecium and two-level absorption tower in this retracting device
Second hydroecium arranges pipeline communication, it is ensured that bottom two-level absorption tower, the liquid of the second hydroecium can flow at the bottom of first grade absorption tower voluntarily
First hydroecium in portion, is inputted the absorbing liquid in first order absorption tower bottom the first hydroecium to each spray equipment by circulating pump, can
To save the use of absorbing liquid storage tank, make full use of two-stage absorption tower, make retracting device overall structure easier.
In sum, use technical scheme, it is thus achieved that vinegar produce in the recovery method of tail gas, be to produce
The tail gas of fermentation tank is passed directly into first grade absorption tower, then discharges via after the process of double absorption tower and deentrainment tower successively, two
The absorption process on level absorption tower, by the monitoring to absorbing liquid pH value, to regulate and control the opportunity that fills into and the amount of filling into of new water, and is passed through
The abundant recovery of organic component during new water is realized tail gas in the way of afterbody spray, it is ensured that the absorption to tail gas is steady
Determine and absorb treatment effect, not affecting the quality of exhaust emissions；After, the absorption of active carbon layer in deentrainment tower, reaches state
The direct discharge standard of family's regulation, directly discharges.The method for recovering tail gas of the present invention, it is achieved that in producing vinegar, tail gas is thorough
The end, is administered and comprehensive recycling, has energy consumption low, and manipulation is simple, and operating cost is low, good excellent of vent gas treatment, recovering effect
Gesture.Additionally, the retracting device that the present invention provides, operation and the operation of the most above-mentioned recovery method control, convenient raw to vinegar
The recycling of tail gas in product.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings and detailed description of the invention to the present invention make further describe in detail:
Fig. 1 is the structural representation of the retracting device of the embodiment of the present invention；
Fig. 2 is the internal structure schematic diagram of the first grade absorption tower of the embodiment of the present invention；
Fig. 3 is the internal structure schematic diagram of the two-level absorption tower of the embodiment of the present invention；
Fig. 4 is the internal structure schematic diagram of the deentrainment tower of the embodiment of the present invention；
In figure 1, first grade absorption tower；2, two-level absorption tower, 3, deentrainment tower；4, the first air inlet；5, the first gas outlet；6,
One packing layer；7, the first spray head；8, overflow pipe；9, pH detector unit；10, the second air inlet；11, the second gas outlet；12,
Two packing layers；13, the second spray head；14, moisturizing spray head；15, electromagnetic valve；16, the 3rd air inlet；17, the 3rd gas outlet；
18, activated carbon adsorption layer.
Detailed description of the invention
Embodiment
The present embodiment relates to the recovery method of tail gas during vinegar produces.
In the production of a kind of vinegar, the retracting device of tail gas, is combined shown in Fig. 2 to Fig. 4 by Fig. 1, and it includes be arranged in series
Level absorption tower 1, two-level absorption tower 2 and deentrainment tower 3.Described first grade absorption tower 1 includes the first tower body, at described first tower body
Bottom is formed with the first hydroecium, above described first hydroecium and the top of the first tower body is respectively equipped with the first air inlet 4 He
First gas outlet 5, is provided with spaced apart in described first tower body between described first air inlet 4 and the first gas outlet 5
Two-layer the first spray equipment, described first spray equipment includes the first packing layer 6, and is positioned at above described first packing layer
First spray head 7, the import of described first spray head 7 is communicated to described first hydroecium via circulating pump, at described first hydroecium
Side be provided with overflow pipe 8, the height of the overfall on described overflow pipe 8 is set to 500mm, in described overflow pipe 8 with described
The connecting pipeline of the first hydroecium is provided with pH detector unit 9, for detecting the pH value of overflow liquid.Described two-level absorption tower 2 wraps
Include the second tower body, be formed with the second hydroecium in the bottom of described second tower body, above described second hydroecium and the second tower body
Top be respectively equipped with the second air inlet 10 and the second gas outlet 11, in described second air inlet 10 He in described second tower body
Being provided with spaced apart two-layer the second spray equipment between second gas outlet 11, described second spray equipment includes the second packing layer
12, and it is positioned at the second spray head 13 above described second packing layer 12, the inlet communication of described second spray head 13 is to institute
Stating circulating pump, described second hydroecium is communicated in the first hydroecium, in described second filler in described second spray equipment on upper strata
The moisturizing spray head 14 being also arranged above being connected with external water source of layer, described moisturizing spray head 14 sprays with the second of its side
Pouring 13 is preferably in interlaced arrangement, and the position of described moisturizing spray head 14 is higher than the position of the second spray head 13 of its side
Put, be beneficial to preferably absorb tail gas.The inlet pipeline of described moisturizing spray head 14 is serially connected with and described pH detector unit 9 phase
The electromagnetic valve 15 coupled, controls the water source switch of moisturizing spray head for the pH value according to overflow liquid, controls supplementary water time.Institute
State deentrainment tower 3 and include the 3rd tower body, be respectively equipped with the 3rd air inlet 16 and the 3rd in the bottom of described 3rd tower body and top and go out
QI KOU 17, is provided with activated carbon adsorption layer 18 in described 3rd tower body between described 3rd air inlet and the 3rd gas outlet.Institute
The first gas outlet 5 stating first grade absorption tower 1 is connected with the second air inlet 10 of two-level absorption tower 2 via exhaust pipe, and described two
Second gas outlet 11 on level absorption tower 2 is connected with the 3rd air inlet 16 of deentrainment tower 3 via exhaust pipe.
Embodiment 1
Carrying out the recovery of tail gas in vinegar production in above-mentioned retracting device, recovery method comprises the following steps:
A, the tail gas in apparatus for acetic acid fermentation tank top vent pipeline is passed through the air inlet of first order absorption tower bottom, tail gas elder generation warp
Crossing one-level packing layer and absorbing liquid spray head, the absorbing liquid of spray falls from top to bottom on the filler being made up of PE material hollow ball
Forming liquid film, tail gas by packing layer, inversely contacts formation convection current, carries out the absorption of tail gas, tail gas from bottom to top with absorbing liquid
Up cross after absorbing liquid spray head PE material hollow ball packing layer identical through one-level again and absorbing liquid spray head, with absorption
Liquid inversely contacts, and carries out the absorption of tail gas, thus completes first order absorption；
B, two grades of absorptions: the tail gas discharged from first grade absorption tower top vent pipeline is passed through the air inlet bottom two-level absorption tower
Mouthful, first pass through one-level PE material hollow ball packing layer and absorbing liquid spray head, inversely contact with absorbing liquid, carry out the suction of tail gas
Receive, then through one-level PE material hollow ball packing layer and absorbing liquid and Water spray head, with absorbing liquid or absorbing liquid and watery vomiting to
Contact, carries out the absorption of tail gas, thus completes two grades of absorptions；
Bottom two-level absorption tower, the absorbing liquid of the second hydroecium flows into first grade absorption tower voluntarily via connecting pipe, inhales with one-level
Receive the absorbing liquid mixing of tower bottom the first hydroecium, use circulating pump to circulate defeated by the absorbing liquid of first order absorption tower bottom the first hydroecium
Entering to each absorbing liquid spray head, the absorbing liquid making spray is identical, all for continuing circulated sprinkling after being absorbed tail gas by water, absorbing tail
The liquid of gas；By pH detector unit on-line monitoring absorbing liquid pH value at the overflow mechanism of first order absorption tower bottom, thus control
The spray of water is operated by moisturizing spray head processed, when absorbing liquid pH value is higher than 4.5, controls on the source water inlet pipes road of moisturizing spray head
Electromagnetic valve be closed, make absorbing liquid and Water spray head spray-absorption liquid；When absorbing liquid pH value is not higher than 4.5, control
Electromagnetic valve on the source water inlet pipes road of moisturizing spray head processed is in opening, makes absorbing liquid and Water spray head spray suction simultaneously
Receive liquid and water；By controlling the spray flux of water, absorbing liquid pH value is maintained to be not less than 3；When absorbing liquid pH value is between 3～4.5,
Absorbing liquid flows into the storage tank of workshop by overflow pipe, maintains stablizing of absorbing liquid total amount by discharge unit absorbing liquid,
Thus ensure tail gas carries out stable, absorption process up hill and dale；
C, discharge: from two-level absorption tower top vent pipeline discharge tail gas be passed through deentrainment tower bottom air inlet, by lower to
On by active carbon layer, via after the very small amount VOC adsorption treatment that tail gas is remained by activated carbon, tail gas passes through top vent pipeline
Directly discharge；
In above-mentioned recovery method, the void tower flow velocity of tail gas is 0.2-0.5m/s, and it is 50 that two-stage absorption tower controls gas liquid ratio:
1-100:1, the capacity of sprinkler of spray head is 300-700L/h.
After testing, tail gas VOC (NMHC) content in apparatus for acetic acid fermentation tank top vent pipeline is 12000-
15000mg/m3, tail gas VOC (NMHC) content in first grade absorption tower top vent pipeline is 1500-2500mg/m3,
Tail gas VOC (NMHC) content in two-level absorption tower top vent pipeline is 150-300mg/m3, the tail of final discharge
Gas VOC (NMHC) content < 100mg/m3, meet the requirement of direct discharge standard.
Embodiment 2
Use retracting device same as in Example 1, with identical recovery method, two-stage during detection absorbing liquid difference pH value
The tail gas VOC content that absorption tower is discharged with deentrainment tower, result is as shown in the table:
| pH | First grade absorption tower discharge VOC (mg/m3) | Two-level absorption tower discharge VOC (mg/m3) | Deentrainment tower discharge VOC (mg/m3) |
| 4.7 | 1215 | 189 | 23 |
| 4.2 | 1531 | 156 | 31 |
| 3.8 | 1926 | 182 | 28 |
| 3.6 | 2193 | 192 | 37 |
| 2.9 | 2356 | 228 | 35 |
As seen from the above table, the vinegar of the present invention produces in the recovery method of tail gas, and the monitoring of absorbing liquid pH value is for tail gas
Recovery, process most important, control ph is 3～4.5 organic component in tail gas can be made thoroughly to be reclaimed, and is back to vinegar
Production recycling, simultaneously process after tail gas reach direct discharge standard.
Comparative example 1
The recovery method of tail gas in the production of a kind of vinegar, uses the recovery method roughly the same with embodiment, uniquely different
Part is, arranges two-stage absorbing liquid spray head rather than first order absorption liquid spray head, first order absorption liquid in two-level absorption tower
With Water spray head, make tail gas spray-absorption via two-stage absorbing liquid in two-level absorption tower, and the water for regulating and controlling adds to
In the absorbing liquid of first order absorption tower bottom the first hydroecium, two-stage absorption tower discharge during detection absorption process absorbing liquid difference pH value
Tail gas VOC content, result is as shown in the table:
| pH | First grade absorption tower discharge VOC (mg/m3) | Two-level absorption tower discharge VOC (mg/m3) |
| 4.9 | 1115 | 179 |
| 4.1 | 1718 | 268 |
| 3.5 | 2256 | 302 |
| 3.2 | 2301 | 439 |
| 2.8 | 2564 | 507 |
As seen from the above table, during the recovery method of employing comparative example 1 is when absorption liquid pH is 4.9 to tail gas, organic component returns
Fruit of producing effects is preferable, but owing to pH value is higher, in absorbing liquid, the yield of organic component can not meet production application, it is impossible to directly returns
Receive recycling；When absorption liquid pH is less than 4.1 to tail gas in the recovery of organic component thorough, cause VOC content the most up to standard.Right
More visible than embodiment 1 and comparative example 1, the vinegar of the present invention produces in the recovery method of tail gas, supplements water and sprays with afterbody
Form fill into, compared to the mode directly supplementing water to absorbing liquid, it is possible to significantly improve the recovery to tail gas, treatment effeciency.
Comparative example 2
In the production of a kind of vinegar, the recovery method of tail gas, uses the recovery method roughly the same with comparative example 1, difference
Being, in absorbing liquid, ethanol content is as monitoring index rather than using absorbing liquid pH value as monitoring index, when in absorbing liquid
Close the valve supplementing water when amount of alcohol is less than 0.8%, stop supplementing new water to first grade absorption tower the first hydroecium；When in absorbing liquid
Open the valve supplementing water when amount of alcohol is more than 1.0%, supplement new water to first grade absorption tower the first hydroecium；By the supplementary tune of water
Control, control absorbing liquid amount of alcohol is at 0.8-1.0%, and when absorbing liquid amount of alcohol is more than 1.0%, absorbing liquid is flowed into by overflow pipe
The storage tank of workshop, detection absorption process absorbing liquid is the tail gas VOC content of two-stage absorption tower discharge when different amount of alcohol,
Result is as shown in the table:
| Concentration of alcohol % | First grade absorption tower discharge VOC (mg/m3) | Two-level absorption tower discharge VOC (mg/m3) |
| 0.6 | 1829 | 318 |
| 0.8 | 2718 | 496 |
| 1.0 | 3256 | 565 |
| 1.1 | 3301 | 639 |
Comparative example 1 is compared visible with comparative example 2, in the recovery method of tail gas, refers to using pH value as the monitoring of absorbing liquid
Mark, compared to the Testing index using ethanol content as absorbing liquid, to the recovery of tail gas, processes that to have monitoring sensitiveer, processes
The significant advantage that effect is more stable.
Claims (9)
1. the recovery method of tail gas during a vinegar produces, it is characterised in that comprise the following steps:
A, first order absorption: tail gas is passed through first grade absorption tower, via two-stage can the spray equipment of spray-absorption liquid, reverse with absorbing liquid
Contact, carries out first order absorption；
B, two grades of absorptions: the tail gas after first order absorption is passed through two-level absorption tower, first can the spray of spray-absorption liquid via one-level
Device, inversely contacts with absorbing liquid, then via one-level can the spray equipment of spray-absorption liquid and water, with absorbing liquid or absorbing liquid
With watery vomiting to contacting, carry out two grades of absorptions；
In described first grade absorption tower, the absorbing liquid of spray is identical, for being absorbed tail gas by water with the absorbing liquid of spray in two-level absorption tower
The liquid of rear continuation circulated sprinkling；Tail gas absorption process monitoring absorbing liquid pH value, when absorbing liquid pH value is higher than 4.5, described spray
Absorbing liquid controls spray-absorption liquid with the spray equipment of water；When absorbing liquid pH value is not higher than 4.5, described spray-absorption liquid and water
Spray equipment controls spray-absorption liquid and water, and controls the spray flux of water to maintain absorbing liquid pH value to be not less than 3；Work as absorption liquid pH
Value is 3～4.5, and discharge unit absorbing liquid is back to produce；
C, discharge: the tail gas after two grades absorb is passed through deentrainment tower, via the absorption of active carbon layer, directly discharges.
Vinegar the most according to claim 1 produce in the recovery method of tail gas, it is characterised in that: described spray-absorption liquid with
In the spray equipment of water, the spray position of water is higher than the spray position of absorbing liquid.
The recovery method of tail gas in vinegar the most according to claim 1 production, it is characterised in that: described in step a, b, c
The empty tower gas velocity of tail gas is 0.2-0.5m/s.
The recovery method of tail gas in vinegar the most according to claim 1 production, it is characterised in that: described two-stage absorption tower
Gas liquid ratio is 50:1-100:1.
The recovery method of tail gas in vinegar the most according to claim 1 production, it is characterised in that: in described two-stage absorption tower
The spray flow of each spray equipment is 300-700L/h.
6. the retracting device of tail gas during a vinegar produces, it is characterised in that: include the first grade absorption tower being arranged in series, two grades of suctions
Receive tower and deentrainment tower,
Described first grade absorption tower includes the first tower body, is formed with the first hydroecium in the bottom of described first tower body, described first
The top of hydroecium and the top of the first tower body are respectively equipped with the first air inlet and the first gas outlet, in institute in described first tower body
State and between the first air inlet and the first gas outlet, be provided with spaced apart two-layer the first spray equipment, described first spray equipment bag
Include the first packing layer, and be positioned at the first spray head above described first packing layer, the import of described first spray head via
Circulating pump is communicated to described first hydroecium, is provided with overflow pipe in the side of described first hydroecium, in described overflow pipe and described the
The connecting pipeline of one hydroecium is provided with pH detector unit；
Described two-level absorption tower includes the second tower body, is formed with the second hydroecium in the bottom of described second tower body, described second
The top of hydroecium and the top of the second tower body are respectively equipped with the second air inlet and the second gas outlet, in institute in described second tower body
State and between the second air inlet and the second gas outlet, be provided with spaced apart two-layer the second spray equipment, described second spray equipment bag
Include the second packing layer, and be positioned at the second spray head above described second packing layer, the inlet communication of described second spray head
To described circulating pump, described second hydroecium is communicated in the first hydroecium, in described second in described second spray equipment on upper strata
The moisturizing spray head being also arranged above being connected with external water source of packing layer, goes here and there on the inlet pipeline of described moisturizing spray head
It is connected to and the described joining electromagnetic valve of pH detector unit；
Described deentrainment tower includes the 3rd tower body, is respectively equipped with the 3rd air inlet and the 3rd in the bottom of described 3rd tower body and top
Gas outlet, is provided with activated carbon adsorption layer in described 3rd tower body between described 3rd air inlet and the 3rd gas outlet.
Vinegar the most according to claim 6 produce in the retracting device of tail gas, it is characterised in that: described moisturizing spray head with
Second spray head interlaced arrangement of its side, the position of described moisturizing spray head is higher than the position of described second spray head of its side
Put.
The retracting device of tail gas in vinegar the most according to claim 6 production, it is characterised in that: the overflow of described overflow pipe
The height of mouth is 500mm.
The retracting device of tail gas in vinegar the most according to claim 6 production, it is characterised in that: described first spray head,
The spray area coverage of the second spray head and moisturizing spray head is 0.5.
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| CN201610538775.3A CN106039938B (en) | 2016-07-09 | 2016-07-09 | The recovery method and retracting device of tail gas in vinegar production |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731519A (en) * | 2016-12-28 | 2017-05-31 | 浙江华源颜料股份有限公司 | A kind of hydrogen governing system of sulphur Asia reaction container |
| CN109985480A (en) * | 2019-04-24 | 2019-07-09 | 杭州余杭振华日化玻璃有限公司 | Exhaust treatment system |
| CN114378025A (en) * | 2021-12-13 | 2022-04-22 | 唐山三友集团兴达化纤有限公司 | Filler flushing device, biological tower and filler flushing method |
| CN114712996A (en) * | 2022-05-07 | 2022-07-08 | 江苏凯美酷碳科技有限公司 | Full-automatic high-efficient solvent device that retrieves of tail gas |
| CN114768487A (en) * | 2022-05-07 | 2022-07-22 | 江苏凯美酷碳科技有限公司 | Circulating system for recycling solvent, performing gas-liquid separation and recycling wastewater and operating method thereof |
| CN116173713A (en) * | 2023-03-20 | 2023-05-30 | 重庆中润新材料股份有限公司 | Treatment method for tail gas generated in methylamine and NMP production |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202237714U (en) * | 2011-08-17 | 2012-05-30 | 河南清水源科技股份有限公司 | Tail gas absorbing system |
| CN203886408U (en) * | 2014-06-23 | 2014-10-22 | 高业萍 | Acetic acid tail gas washing device |
| CN204170587U (en) * | 2014-09-16 | 2015-02-25 | 上海安赐机械设备有限公司 | A kind of device strengthening iodomethane in absorption acetate acid tail gas |
-
2016
- 2016-07-09 CN CN201610538775.3A patent/CN106039938B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202237714U (en) * | 2011-08-17 | 2012-05-30 | 河南清水源科技股份有限公司 | Tail gas absorbing system |
| CN203886408U (en) * | 2014-06-23 | 2014-10-22 | 高业萍 | Acetic acid tail gas washing device |
| CN204170587U (en) * | 2014-09-16 | 2015-02-25 | 上海安赐机械设备有限公司 | A kind of device strengthening iodomethane in absorption acetate acid tail gas |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731519A (en) * | 2016-12-28 | 2017-05-31 | 浙江华源颜料股份有限公司 | A kind of hydrogen governing system of sulphur Asia reaction container |
| CN109985480A (en) * | 2019-04-24 | 2019-07-09 | 杭州余杭振华日化玻璃有限公司 | Exhaust treatment system |
| CN114378025A (en) * | 2021-12-13 | 2022-04-22 | 唐山三友集团兴达化纤有限公司 | Filler flushing device, biological tower and filler flushing method |
| CN114712996A (en) * | 2022-05-07 | 2022-07-08 | 江苏凯美酷碳科技有限公司 | Full-automatic high-efficient solvent device that retrieves of tail gas |
| CN114768487A (en) * | 2022-05-07 | 2022-07-22 | 江苏凯美酷碳科技有限公司 | Circulating system for recycling solvent, performing gas-liquid separation and recycling wastewater and operating method thereof |
| CN114712996B (en) * | 2022-05-07 | 2023-11-21 | 江苏凯美酷碳科技有限公司 | Full-automatic tail gas high-efficiency solvent recovery device |
| CN114768487B (en) * | 2022-05-07 | 2023-11-21 | 江苏凯美酷碳科技有限公司 | Circulating system for solvent recovery gas-liquid separation and wastewater reuse and operation method thereof |
| CN116173713A (en) * | 2023-03-20 | 2023-05-30 | 重庆中润新材料股份有限公司 | Treatment method for tail gas generated in methylamine and NMP production |
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|---|---|
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