CN101045190A - Method for recovering organic waste gas during printing or coating production - Google Patents
Method for recovering organic waste gas during printing or coating production Download PDFInfo
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- CN101045190A CN101045190A CN 200710052011 CN200710052011A CN101045190A CN 101045190 A CN101045190 A CN 101045190A CN 200710052011 CN200710052011 CN 200710052011 CN 200710052011 A CN200710052011 A CN 200710052011A CN 101045190 A CN101045190 A CN 101045190A
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Abstract
A process for recovering the organic waste gas during printing and coating includes such steps as cooling by air cooler, pressurizing by circulating blower, adsorbing by activated carbon fiber box, adsorbing, heat exchange, condensing, and layering to recover the organic solvent.
Description
Technical field
The present invention relates to a kind of recovery method of organic exhaust gas, the recovery method of organic exhaust gas in specifically a kind of printing and the coating production process.
Background technology
In industries such as printing, coating, contain a large amount of organic solvents in printing-ink, the glue.After printing and being coated with, generally printing sheets and coating to be carried out drying with baking oven.As shown in Figure 1, paper or coating are transported to drying box, carry out drying by the air blast heat air delivery to drier then.Organic solvent produces a large amount of organic exhaust gas through baking oven heating back in dry run.At present organic exhaust gas is had two kinds of processing methods: a kind of is direct discharging, has so both wasted a large amount of organic solvents, has produced a large amount of pollutions again; Another kind method is to discharge after the utilization NACF simply adsorbs recovery again, this method can reclaim a part of organic solvent effectively, although this method Recovery of Organic Solvent rate is higher, but because the concentration height of organic exhaust gas in the tail gas, gas after the processing does not reach the environment protection emission requirement, and saturated activated carbon fiber directly carries out desorb with water vapour after the absorption, and energy resource consumption is bigger.Therefore the recovery method of a kind of new organic exhaust gas of invention is highly profitable in the production process of printing, coating.
Summary of the invention
The object of the invention is exactly the defective that exists at existing method, provides the recovery method of organic exhaust gas in a kind of printing and the coating production process, to remedy the deficiency of art methods.
Technical scheme of the present invention is achieved in that it is that the waste gas that contains organic solvent that baking oven discharges is cooled to below 40 ℃ through aerial cooler, after the circulating fan supercharging, enter the adsorption box that has loaded NACF, adsorb the waste gas that by the heating of desorb vapour after, regulate to reach through heat exchanger again and enter the baking oven circulation after temperature of oven requires and be used for heating, the stripping gas of moisture vapor and organic solvent enters condenser again and carries out condensation after the heat exchanger heat exchange, carry out layering to the layering groove at last, organic solvent enters storage tank and reclaims.Wherein adsorption box is formed with upper box by four, is divided into two groups, every group of two or more absorption casing, and an absorption casing adsorbs, and another one or a plurality of absorption casing carry out desorption process, and desorb vapour is evenly carried out continuously.
The gas of the present invention after carbon fiber adsorption and catalytic combustion is directly discharging not, but enters closed circulation use in the baking oven, and organic exhaust gas all is recycled into organic solvent, has realized the zero-emission of organic exhaust gas.Gas after the absorption enters preheating by stripping vapor before entering the baking oven heater, and circulated air is preheated to higher temperature by desorb vapour, has saved a large amount of steam.Stripping vapor temperature after circulated air is taken away a large amount of heats of vaporization reduces again to be cooled off through condenser, has saved cooling water amount.The inventive method had both reclaimed a large amount of organic solvents, made waste gas reach the environment protection emission requirement, had saved a large amount of energy again.
Description of drawings
Fig. 1 is the schematic diagram of prior art
Fig. 2 is a process chart of the present invention
The specific embodiment
Below in conjunction with embodiment and process chart the present invention is further described:
As shown in the figure, the waste gas that contains organic solvent by baking oven 11 dischargings is cooled to below 40 ℃ through aerial cooler 5, after circulating fan 12 superchargings, enter and inhale the adsorption box that has loaded NACF, adsorption box is made up of four casings, is divided into two groups, and 1,2 absorption casings are one group, 3,4 absorption casings are one group, alternately adsorb and desorb, desorb vapour is evenly carried out continuously, thereby to make full use of the latent heat of vaporization of desorb vapour.Adsorb the waste gas that by the heating of desorb vapour after, regulate the temperature requirement that reaches baking oven 11 through heat exchanger 7 again, the stripping gas of moisture vapor and organic solvent enters condenser 8 again and further carries out layering to layering groove 9 in the cooling back after heat exchanger 6 heat exchange, organic solvent enters storage tank 10, and layering water is further handled discharging.
Discharge toluene in embodiment 1, certain printing house recombination process, ethyl acetate mix waste gas, air circulation 5000m
3/ h, waste gas is discharged by baking oven 11, after aerial condenser 5 is condensed to 30 ℃, enter the absorption of carbon fiber adsorption and catalytic combustion case by circulating fan 12 pressurizations, adsorption box is made up of four casings, be divided into two groups, 1,2 absorption casings are one group, 3,4 absorption casings are one group, alternately adsorb and desorb, and the waste gas after the absorption reaches 85 ℃ through stripping vapor heat exchange (heat exchanger is a fin-tube type heat exchanger), ℃ enter baking oven 11 again through electrical heating to 120 again and be used for the circulation heating, gas does not have and effluxes, and has reduced the heating institute calorific requirement of baking oven gas through heat exchange, has reduced the cooling water amount of desorb vapour condenser 8 simultaneously.The stripping gas of moisture vapor and toluene, ethyl acetate mix waste gas enters condenser 8 again and further carries out layering to layering groove 9 in the cooling back after heat exchanger 6 heat exchange, toluene and ethyl acetate organic solvent enter storage tank 10 respectively, and layering water is further handled discharging.Reality is per hour saved baking oven electricity consumption 90KW, and per hour the economized cycle cooling water is 80 tons.
Claims (4)
1, the recovery method of organic exhaust gas in a kind of printing and the coating production process, it is that the waste gas that contains organic solvent that baking oven discharges is cooled to below 40 ℃ through aerial cooler, after the circulating fan supercharging, enter the adsorption box that has loaded NACF, adsorb the waste gas that by the heating of desorb vapour after, regulate to reach through heat exchanger again and enter the baking oven circulation after temperature of oven requires and be used for heating, the stripping gas of moisture vapor and organic solvent enters condenser again and carries out condensation after the heat exchanger heat exchange, carry out layering to the layering groove at last, organic solvent enters storage tank and reclaims.
2, the recovery method of organic exhaust gas in printing according to claim 1 and the coating production process, wherein adsorption box is formed with upper box by four, be divided into two groups, every group of two or more absorption casing, an absorption casing adsorbs, another one or a plurality of absorption casing carry out desorption process, and stripping gas is evenly reclaimed continuously.
3, the recovery method of organic exhaust gas in printing according to claim 1 and the coating production process, wherein stripping vapor is sent back to baking oven by the cold air heat exchange after cold air is heated.
4, the recovery method of organic exhaust gas in printing according to claim 1 and the coating production process wherein is recycled in the baking oven after the blower fan supercharging through the gas after the adsorption box absorption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100520114A CN100502994C (en) | 2007-04-28 | 2007-04-28 | Method for recovering organic waste gas during printing or coating production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100520114A CN100502994C (en) | 2007-04-28 | 2007-04-28 | Method for recovering organic waste gas during printing or coating production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101045190A true CN101045190A (en) | 2007-10-03 |
| CN100502994C CN100502994C (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100520114A Active CN100502994C (en) | 2007-04-28 | 2007-04-28 | Method for recovering organic waste gas during printing or coating production |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489106A (en) * | 2011-12-08 | 2012-06-13 | 孙宗长 | Method for cycle collection of exhaust gas by adopting secondary adsorption |
| CN102580469A (en) * | 2012-02-17 | 2012-07-18 | 江苏科圣热能设备工程有限公司 | Technical method and device for comprehensively balancing energy of desorption steam and flue gas during flue gas desulfurization |
| CN104399351A (en) * | 2014-11-29 | 2015-03-11 | 河南国花彩印包装有限公司 | Solvent-containing air separation system |
| CN104436743A (en) * | 2014-11-29 | 2015-03-25 | 河南国花彩印包装有限公司 | Solvent collecting system for printing machine |
| CN105080175A (en) * | 2015-08-28 | 2015-11-25 | 赵智民 | Exhaust-emission-free online printing solvent recovery device |
| CN105617810A (en) * | 2016-03-18 | 2016-06-01 | 天伟化工有限公司 | Closed-cycle recycling method for solvent in PVC foaming board production |
| CN105854478A (en) * | 2016-04-01 | 2016-08-17 | 武汉旭日华科技发展有限公司 | Apparatus and method for treating exhaust gas in the production of PVC gloves |
| CN106512642A (en) * | 2016-12-26 | 2017-03-22 | 郑州天舜电子技术有限公司 | Activated carbon waste gas treatment device |
| CN108067083A (en) * | 2018-01-24 | 2018-05-25 | 德阳天赐塑胶有限责任公司 | A kind of coating complex machine device for recycling exhaust gas |
| CN110339985A (en) * | 2019-08-09 | 2019-10-18 | 天津市瑞通恒达环保技术有限公司 | The circulating coater oven aqueous solvent coating heat recovery system of return air and operation method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5133785A (en) * | 1991-02-26 | 1992-07-28 | Air Products And Chemicals, Inc. | Separation of multicomponent gas mixtures by selective adsorption |
| CN2205239Y (en) * | 1994-03-14 | 1995-08-16 | 张明荣 | Organic waste gas purifying and reclaiming device |
| JP2000026319A (en) * | 1998-07-07 | 2000-01-25 | Mitsui Eng & Shipbuild Co Ltd | Recovery of lower hydrocarbons from off-gas of polyolefin manufacturing equipment |
| CN2686708Y (en) * | 2004-04-07 | 2005-03-23 | 马建 | Intermittent serial adsorption organic waste gas continuous recovery apparatus |
| CN100503006C (en) * | 2005-06-22 | 2009-06-24 | 福建大拇指环保科技有限公司 | Automatic reclaiming process for industrial organic exhaust gas |
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2007
- 2007-04-28 CN CNB2007100520114A patent/CN100502994C/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489106A (en) * | 2011-12-08 | 2012-06-13 | 孙宗长 | Method for cycle collection of exhaust gas by adopting secondary adsorption |
| CN102489106B (en) * | 2011-12-08 | 2013-10-16 | 洛阳汇通天宝环保科技有限公司 | Method for cycle collection of exhaust gas by adopting secondary adsorption |
| CN102580469A (en) * | 2012-02-17 | 2012-07-18 | 江苏科圣热能设备工程有限公司 | Technical method and device for comprehensively balancing energy of desorption steam and flue gas during flue gas desulfurization |
| CN104436743B (en) * | 2014-11-29 | 2016-02-17 | 河南国花彩印包装有限公司 | A kind of printing machine solvent collecting system |
| CN104436743A (en) * | 2014-11-29 | 2015-03-25 | 河南国花彩印包装有限公司 | Solvent collecting system for printing machine |
| CN104399351A (en) * | 2014-11-29 | 2015-03-11 | 河南国花彩印包装有限公司 | Solvent-containing air separation system |
| CN104399351B (en) * | 2014-11-29 | 2016-03-16 | 河南国花彩印包装有限公司 | A kind of solvent-laden air-seperation system |
| CN105080175A (en) * | 2015-08-28 | 2015-11-25 | 赵智民 | Exhaust-emission-free online printing solvent recovery device |
| CN105617810A (en) * | 2016-03-18 | 2016-06-01 | 天伟化工有限公司 | Closed-cycle recycling method for solvent in PVC foaming board production |
| CN105854478A (en) * | 2016-04-01 | 2016-08-17 | 武汉旭日华科技发展有限公司 | Apparatus and method for treating exhaust gas in the production of PVC gloves |
| CN106512642A (en) * | 2016-12-26 | 2017-03-22 | 郑州天舜电子技术有限公司 | Activated carbon waste gas treatment device |
| CN108067083A (en) * | 2018-01-24 | 2018-05-25 | 德阳天赐塑胶有限责任公司 | A kind of coating complex machine device for recycling exhaust gas |
| CN108067083B (en) * | 2018-01-24 | 2023-08-11 | 德阳天赐塑胶有限责任公司 | Coating compounding machine waste gas recycle device |
| CN110339985A (en) * | 2019-08-09 | 2019-10-18 | 天津市瑞通恒达环保技术有限公司 | The circulating coater oven aqueous solvent coating heat recovery system of return air and operation method |
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| Publication number | Publication date |
|---|---|
| CN100502994C (en) | 2009-06-24 |
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