CN101053733A - Processing method for organic waste gas - Google Patents
Processing method for organic waste gas Download PDFInfo
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- CN101053733A CN101053733A CN 200710026709 CN200710026709A CN101053733A CN 101053733 A CN101053733 A CN 101053733A CN 200710026709 CN200710026709 CN 200710026709 CN 200710026709 A CN200710026709 A CN 200710026709A CN 101053733 A CN101053733 A CN 101053733A
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Abstract
The invention discloses a method for reclaiming the organic solvent in the organic exhaust gas, comprising absorbing the organic solvent in the exhaust gas using the absorber after the organic exhaust gas is absorbing concentrated, treating it to be the gas draining into the air directly according with the require of environmental protection after passing the absorbing concentrator. The invention has a simply technological process and a convenient operation, which saves the energy sources, reduces the product cost, makes the organic material in the exhaust gas lower than that stipulated by ISO14000 and environmental law. And at the same time, the organic material in the exhaust gas can be reused as resource, the income gotten from the organic solvent reclaimed from the exhaust gas can counteract the investment and operation cost of the equipment, the economic benefit is visible, and using field is broad.
Description
Technical field
The present invention relates to the organic exhaust gas processing technology field, specifically is a kind of organic waste gas treatment method.
Background technology
Volatile organic matter (Volatile Organic Compounds, VOC) generally be under the accurate state of index (20 ℃, 760mmHg), vapour pressure is greater than the organic matter more than the 0.1mmHg, the problem of environmental pollution that it caused extensively is present in all types of industries, automotive lacquer for example, household electrical appliance are produced, furniture is produced, iron is printed jar, packages printing, adhesive tape is produced, lithium battery is produced, shoemaking, electronic element, container production etc. all can produce a large amount of organic exhaust gas, will cause direct or indirect adverse effect to health and environment if these organic exhaust gas directly are discharged in the atmosphere.
Because the investment organic waste gas treatment device needs the fund of some; add that organic waste gas treatment equipment operation also needs certain operating cost, therefore simple is that the organic waste gas treatment device of purpose also is difficult at no distant date by utilization and extention widely with the environmental protection.
Summary of the invention
The objective of the invention is to problem and shortage at above-mentioned existence, carry a kind of novel organic waste gas treatment method of arch, this technology not only can make content of organics in the waste gas be lower than the content of ISO14000 and environmental regulation regulation, can also make the organic substance in the waste gas be recovered utilization as resource simultaneously.
Technical scheme of the present invention is achieved in that
I) with after the processing of organic exhaust gas process absorption inspissator, waste gas is separated into two strands of air-flows, one air-flow can directly enter atmosphere, and one air-flow contains the organic solvent of high concentration in addition;
II) utilize the absorption tower, the organic solvent in the air-flow of discharging by absorbent absorption step I forms that first class purification gas is discharged from top, absorption tower and the solution that contains organic solvent is discharged from the bottom, absorption tower;
III) be separated into the clean relatively gas that can directly enter atmosphere after the first class purification gas that comes out from the absorption tower is handled through the absorption inspissator again and contain the organic solvent that do not absorbed fully and the residual gas of a spot of absorbent;
IV) residual gas repeating step II, the III of Step II I generation carry out circular treatment.
Further technical scheme of the present invention is:
Process cooling processing before organic exhaust gas is handled through the absorption inspissator among the step I; Air-flow enters before the absorption tower through supercooling, freezing processing in the Step II; Step I, absorption inspissator among the Step II I adopts rotary-type inspissator, the runner of rotary-type inspissator adopts the molecular sieve manufacturing to form, during the runner operate as normal rotating speed be 1 change～5 change/hour, rotary-type inspissator has been divided into 3 zones, one is treatment region, one is the cooling zone, one is the renewing zone, organic exhaust gas flows through the back from rotary-type inspissator treatment region and is adsorbed in the air-flow that runner becomes relative clean because of organic solvent, the content of organic solvent is minimum in the air-flow after the processing reduces to below the 10ppm, the organic exhaust gas that part flows through from rotary-type inspissator cooling zone, after being heated to certain temperature, form regeneration air, regeneration air flows through through rotary-type inspissator renewing zone again, because rotary-type inspissator renewing zone is reproduced air heat, simultaneously, runner is taken away with regeneration air when being adsorbed on the rotary-type inspissator of the organic solvent process renewing zone on the runner with the per hour speed rotation of 1 commentaries on classics～5 commentaries on classics, forms the air-flow that contains high levels of organic solvents.During the work of rotary-type inspissator, regeneration air and the ratio of handling air are between 1/10～1/20, and the concentration of organic solvent can be to handle 10～20 times of preceding concentration in the regeneration air.
The present invention is owing to adopted as above technical process, technological process is simple, easy to operate, both energy savings reduced production costs again, and the organic waste gas treatment device that the present invention relates to is to be prerequisite with the organic solvent recycled in the organic exhaust gas, make the content of handling organic solvent in the waste gas of back reach environmental emission standard simultaneously, and by utilizing the organic solvent that reclaims in the waste gas to obtain certain income in order to compensate for the investment and the operating cost of equipment, its economic benefit is obvious, and application is extensive.
Description of drawings
Fig. 1 is a kind of process chart of the present invention;
Fig. 2 is an another kind of process chart of the present invention.
The specific embodiment
Embodiment 1
As shown in Figure 1, adopt following technical process:
I) with organic exhaust gas A process cooling water heat exchanger cooling processing, utilizing blower fan that gas is blown into rotary-type inspissator, simultaneously, the runner of rotary-type inspissator changes with 1 and～5 changes/hour the speed rotation, organic exhaust gas is from becoming the air-flow B of relative clean after rotary-type inspissator treatment region flows through, air-flow B can directly enter atmosphere, the organic exhaust gas that part flows through from rotary-type inspissator cooling zone, after being heated to certain temperature, form regeneration air, regeneration air flows through through rotary-type inspissator renewing zone again, and the organic solvent that is adsorbed on the runner is taken away with regeneration air through rotary-type inspissator renewing zone, forms the air-flow C that contains high levels of organic solvents.
II) after air-flow C process cooling water heat exchanger cooling, the chilled water heat exchanger freezing processing, utilize the absorption tower, by the organic solvent among the absorbent absorption air-flow C, form that first class purification gas G discharges from top, absorption tower and the solution F that contains organic solvent discharges from the bottom, absorption tower, first class purification gas G can contain and do not absorbed a spot of absorbent that volatilizees in organic solvent and the absorption process fully.
III) be separated into the clean relatively gas H that can directly enter atmosphere after first class purification gas G handles through rotary-type inspissator again and contain the organic solvent that do not absorbed fully and the residual gas L of a spot of absorbent.
IV) residual gas L repeating step II, III carry out circular treatment.
Embodiment 2,
As shown in Figure 2, adopt following technical process:
I) utilize blower fan that organic exhaust gas A is blown into rotary-type inspissator, simultaneously, the runner of rotary-type inspissator changes with 1 and～5 changes/hour the speed rotation, organic exhaust gas is from becoming the air-flow B of relative clean after rotary-type inspissator treatment region flows through, air-flow B can directly enter atmosphere, the organic exhaust gas that part flows through from rotary-type inspissator cooling zone, after being heated to certain temperature, form regeneration air, regeneration air flows through through rotary-type inspissator renewing zone again, organic solvent on being adsorbed on runner is taken away with regeneration air when rotary-type inspissator renewing zone, forms the air-flow C that contains high levels of organic solvents.
II) air-flow C enters the absorption tower, by the organic solvent among the absorbent absorption air-flow C, form that first class purification gas G discharges from top, absorption tower and the solution F that contains organic solvent discharges from the bottom, absorption tower, first class purification gas G can contain and not absorbed organic solvent and a spot of absorbent fully.
III) be separated into the clean relatively gas H that can directly enter atmosphere after first class purification gas G handles through rotary-type inspissator again and contain the organic solvent that do not absorbed fully and the residual gas L of a spot of absorbent.
IV) residual gas L repeating step II, III carry out circular treatment.
In the foregoing description, the absorbent that the absorption tower is selected for use can be high boiling organic solvents such as dimethyl formamide, N-methyl pyrrolidone or with oil crops such as soybean, rape sons, the liquid fuel that oil-yielding shrubs such as oil palm, Chinese pistache fruit etc. are produced for raw material, the selection of absorbent comes final decision by the organic solvent that will absorb.
Although the present invention describes with reference to specific embodiment, this description and not meaning that is construed as limiting the present invention.With reference to description of the invention, other of the disclosed embodiments changes, if all can expect for those skilled in the art, so, such variation should belong within this claim institute's restricted portion and the spirit.
Claims (8)
1, organic waste gas treatment method is characterized in that comprising the steps:
I) with after the processing of organic exhaust gas (A) process absorption inspissator, waste gas (A) is separated into two strands of air-flows, one air-flow (B) can directly enter atmosphere, and one air-flow (C) contains the organic solvent of high concentration in addition;
II) utilize the absorption tower, the organic solvent in the air-flow (C) of discharging by absorbent absorption step I forms that first class purification gas (G) is discharged from top, absorption tower and the solution (F) that contains organic solvent is discharged from the bottom, absorption tower;
III) be separated into the clean relatively gas (H) that can directly enter atmosphere after the first class purification gas (G) that comes out from the absorption tower is handled through the absorption inspissator again and contain the organic solvent that do not absorbed fully and the residual gas (L) of a spot of absorbent;
IV) residual gas (L) repeating step II, the III of Step II I generation carry out circular treatment.
2, organic waste gas treatment method according to claim 1 is characterized in that: process cooling processing before above-mentioned steps I organic exhaust gas (A) is handled through the absorption inspissator.
3, organic waste gas treatment method according to claim 1 is characterized in that: above-mentioned steps II air-flow (C) enters before the absorption tower through supercooling, freezing processing.
4, organic waste gas treatment method according to claim 1, it is characterized in that: the absorption inspissator among above-mentioned steps I, the Step II I adopts rotary-type inspissator, the runner of described rotary-type inspissator adopts the molecular sieve manufacturing to form, rotary-type inspissator is divided into 3 zones, and one is that treatment region, one are that cooling zone, one are the renewing zones.
5, organic waste gas treatment method according to claim 4 is characterized in that: during above-mentioned rotary-type inspissator operate as normal rotating speed be 1 change～5 change/hour.
6, according to any described organic waste gas treatment method of claim in the claim 1 to 5, it is characterized in that: the absorbent that above-mentioned absorption tower is selected for use is a dimethyl formamide.
7, according to any described organic waste gas treatment method of claim in the claim 1 to 5, it is characterized in that: the absorbent that above-mentioned absorption tower is selected for use is the N-methyl pyrrolidone.
8, according to any described organic waste gas treatment method of claim in the claim 1 to 5, it is characterized in that: the absorbent that above-mentioned absorption tower is selected for use is a liquid fuel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710026709 CN101053733A (en) | 2007-02-05 | 2007-02-05 | Processing method for organic waste gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710026709 CN101053733A (en) | 2007-02-05 | 2007-02-05 | Processing method for organic waste gas |
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| CN101053733A true CN101053733A (en) | 2007-10-17 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657336A (en) * | 2012-08-31 | 2014-03-26 | 傑智環境科技股份有限公司 | System and method for purifying organic compounds in air |
| CN104307310A (en) * | 2014-11-07 | 2015-01-28 | 清本环保工程(杭州)有限公司 | Gas treatment system and method in photosensory membrane printing |
| CN104474843A (en) * | 2014-12-01 | 2015-04-01 | 马军 | Device for treating organic waste gas during production of printing plate material of computer-to-plate |
| CN105833666A (en) * | 2016-04-27 | 2016-08-10 | 河北美邦工程科技股份有限公司 | VOCs waste gas treatment method |
| CN106139815A (en) * | 2015-04-08 | 2016-11-23 | 江苏中远环保科技有限公司 | A kind of cleaning of evaporator gas withdrawal processing technique |
| CN106237790A (en) * | 2016-08-09 | 2016-12-21 | 重庆三众环保投资顾问有限公司 | A kind of lacquer spraying waste gas absorbing liquid |
| CN107715651A (en) * | 2017-10-17 | 2018-02-23 | 华南理工大学 | A kind of efficient low damage solvent for being used to absorb toluene and flow |
| WO2018054317A1 (en) * | 2016-09-21 | 2018-03-29 | 苏州迈沃环保工程有限公司 | Method for reclaiming nmp from gas by utilizing high boiling point solvent |
| CN108531213A (en) * | 2018-04-26 | 2018-09-14 | 杭州立佳环境服务有限公司 | A kind of purification recovery process of VOCs machine oil elution absorbing liquid |
| CN111054173A (en) * | 2018-10-17 | 2020-04-24 | 伊利诺斯工具制品有限公司 | Exhaust gas purification system |
-
2007
- 2007-02-05 CN CN 200710026709 patent/CN101053733A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657336A (en) * | 2012-08-31 | 2014-03-26 | 傑智環境科技股份有限公司 | System and method for purifying organic compounds in air |
| CN104307310A (en) * | 2014-11-07 | 2015-01-28 | 清本环保工程(杭州)有限公司 | Gas treatment system and method in photosensory membrane printing |
| CN104474843A (en) * | 2014-12-01 | 2015-04-01 | 马军 | Device for treating organic waste gas during production of printing plate material of computer-to-plate |
| CN106139815A (en) * | 2015-04-08 | 2016-11-23 | 江苏中远环保科技有限公司 | A kind of cleaning of evaporator gas withdrawal processing technique |
| CN105833666A (en) * | 2016-04-27 | 2016-08-10 | 河北美邦工程科技股份有限公司 | VOCs waste gas treatment method |
| CN106237790A (en) * | 2016-08-09 | 2016-12-21 | 重庆三众环保投资顾问有限公司 | A kind of lacquer spraying waste gas absorbing liquid |
| WO2018054317A1 (en) * | 2016-09-21 | 2018-03-29 | 苏州迈沃环保工程有限公司 | Method for reclaiming nmp from gas by utilizing high boiling point solvent |
| CN107715651A (en) * | 2017-10-17 | 2018-02-23 | 华南理工大学 | A kind of efficient low damage solvent for being used to absorb toluene and flow |
| CN108531213A (en) * | 2018-04-26 | 2018-09-14 | 杭州立佳环境服务有限公司 | A kind of purification recovery process of VOCs machine oil elution absorbing liquid |
| CN108531213B (en) * | 2018-04-26 | 2021-01-08 | 杭州立佳环境服务有限公司 | Purification and recovery process of VOCs engine oil leaching absorption liquid |
| CN111054173A (en) * | 2018-10-17 | 2020-04-24 | 伊利诺斯工具制品有限公司 | Exhaust gas purification system |
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