CN100490945C - Continuously absorbing and rectifying organic waste recovering method - Google Patents

Continuously absorbing and rectifying organic waste recovering method Download PDF

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Publication number
CN100490945C
CN100490945C CNB200710052010XA CN200710052010A CN100490945C CN 100490945 C CN100490945 C CN 100490945C CN B200710052010X A CNB200710052010X A CN B200710052010XA CN 200710052010 A CN200710052010 A CN 200710052010A CN 100490945 C CN100490945 C CN 100490945C
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rectifying
temperature
absorber
exhaust gas
stripping vapor
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CN101053753A (en
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杨旭东
肖华青
范飞飞
贺涛
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Wuhan Xurihua Science And Technology Development Co ltd
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Wuhan Xurihua Science And Technology Development Co ltd
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  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Separation Of Gases By Adsorption (AREA)

Abstract

The invention relates to an organic exhaust gas recovery method, especially to an organic exhaust gas recovery method of continuous adsorption and rectification. The method is sent the organic exhaust gas in to the activated carbon fibre absorber, and the resolution steam enters a three way auto valve directly where the temperature sensor is mounted and which is controlled by the temperature sensor. The resolution steam enters rectification tower directly to be rectified when the temperature is higher than 100 degree C, and when the temperature is lower than 100 degree C, the resolution steam with noncondensing air is condensed into a condensator, wherein the condensate is continuously pumped into rectification tower and the noncondensing air is re-absorbed back to the absorber. The invention has the advantage of a simple process and a convenient operation, also be capable of continuous adsorption and rectification, has a high rate of recovery in organic solvent, and saves energy sources.

Description

The method for organic waste gas recovery of a kind of continuous adsorption and rectifying
Technical field
The present invention relates to a kind of recovery method of organic exhaust gas, the method for organic waste gas recovery of specifically a kind of continuous adsorption and rectifying.
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, 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.For these organic exhaust gas, generally be to carry out desorb again after the absorption of utilization carbon fiber adsorption and catalytic combustion device is reclaimed.Use water vapor desorption during desorb, desorb vapour is cooled to the aqueous solution through condenser, and the aqueous solution enters rectifying column again and purifies.There is following defective in this method: 1, the cooling of desorb vapour need be become liquid phase earlier, thereby consume big energy.2, need to consume big energy in the distillation process aqueous solution heating vaporization.3, the heat exchanger that needs the very big heat exchange area of investment.If stripping vapor directly enters rectifying column without condensation, because desorb vapour enters absorber in earlier stage, air pocket in the absorber causes containing in the desorb vapour and do not coagulate air in a large number, and is influential to vapor-liquid separation, causes rectifying not carry out continuously.Therefore the recovery method of inventing a kind of new organic exhaust gas solves above problem and is highly profitable.
Summary of the invention
The object of the invention is exactly the defective that exists at existing method, provides the method for organic waste gas recovery of a kind of continuous adsorption and continuous rectification, to remedy the deficiency of art methods.
Technical scheme of the present invention is achieved in that it is organic exhaust gas to be passed into the carbon fiber adsorption and catalytic combustion device adsorb, stripping vapor directly enters a threeway automatic valve, on the threeway automatic valve temperature sensor is housed, by temperature sensor triple valve is controlled switching automatically, when temperature was higher than certain value (as 100 ℃), stripping vapor directly entered rectifying column and carries out rectifying; When temperature is lower than certain value (as 100 ℃), at this moment contain not the stripping vapor that coagulates air and enter a condenser condenses, condensate liquid is continuously pumped into rectifying column, does not coagulate air and returns absorber and adsorb.For the desorb vapour that guarantees to enter rectifying column continuously, the absorber of design is made up of four or more casing, is divided into two groups, every group of two or more absorption casing, an absorption casing adsorbs, and another one or a plurality of absorption casing carry out desorption process, and absorption and desorb hocket.In two groups, desorb vapour is by programme-control, and the desorb that hockets makes whole process stripping gas uninterruptedly evenly carry out rectifying continuously and reclaims.
It is simple that the present invention has technology, easy to operate advantage, and it can adsorb and rectifying continuously, and it also has organic solvent rate of recovery height, the advantage of energy savings.
Description of drawings
Fig. 1 is a process flow diagram of the present invention
Fig. 2 alternately adsorbs schematic diagram with desorb for the carbon fiber adsorption and catalytic combustion device
The specific embodiment
Below in conjunction with process chart and embodiment the present invention is further described:
As shown in Figure 1, the present invention introduces the absorber that has loaded NACF with organic exhaust gas by blower fan 10 to adsorb, absorber is made up of four casings (1,2,3,4), be divided into two groups, 1,2 absorption casings are one group, and 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.Stripping vapor directly enters a threeway automatic valve 5, on the threeway automatic valve 5 temperature sensor is housed, by temperature sensor triple valve 5 is controlled automatically, when temperature is higher than certain value (as 100 ℃), stripping vapor directly enters rectifying column 9 and carries out rectifying, and the solvent reclaiming that obtains conforming to quality requirements is in production; When temperature is lower than certain value (as 100 ℃), contain not the stripping vapor that coagulates air and enter condenser 6 condensations, after condensate liquid enters vapour liquid separator 7, squeeze into rectifying column continuously with pump 8 and carry out rectifying, air returns absorber and adsorbs with fixed attention.
The ethanol waste gas of embodiment 1, certain printing enterprise's discharging, air quantity 12000m 3/ h, concentration 10g/m 3, adsorb recovery with NACF, (use the 640kg NACF, each adsorption box is loaded the 160kg NACF to design four adsorption boxes.And become two adsorption boxes by former technological design, each adsorption box uses NACF 320kg),), stripping steam 300kg/h, desorb vapour directly enters the rectifying column of a ¢ 500 * 12000, obtain the ethanol that content meets production requirement through rectifying, per hour save more than the steam 300kg economized cycle cooling water 160m 3/ h.
The methanol waste gas of embodiment 2, certain chemical enterprise emission, air quantity 1500m 3/ h, concentration 45g/m 3Reclaim four absorbers of design with carbon fiber adsorption and catalytic combustion, each absorber is filled NACF 80kg, adsorption time 20min, desorption time 10min, drying time, 5min separated suck drain time 3min, intermittent time 2min, desorb vapour directly enter the methyl alcohol that stuffing rectification column rectifying obtains more than 99% and are back to production.

Claims (1)

1, the method for organic waste gas recovery of a kind of continuous adsorption and rectifying, it is organic exhaust gas to be passed into the carbon fiber adsorption and catalytic combustion device adsorb, stripping vapor directly enters a threeway automatic valve, on the threeway automatic valve temperature sensor is housed, by temperature sensor triple valve is controlled automatically, when temperature was higher than 100 ℃, stripping vapor directly entered rectifying column and carries out rectifying; When temperature is lower than 100 ℃, contain the stripping vapor that does not coagulate air and enter a condenser condenses, condensate liquid is continuously pumped into rectifying column, does not coagulate air and returns absorber and adsorb, and absorber is formed with upper box by four, be divided into two groups, every group of two or more absorption casing, an absorption casing adsorbs, and another one or a plurality of absorption casing carry out desorption process, absorption and desorb hocket, and make stripping vapor evenly carry out rectifying continuously and reclaim.
CNB200710052010XA 2007-04-28 2007-04-28 Continuously absorbing and rectifying organic waste recovering method Active CN100490945C (en)

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CNB200710052010XA CN100490945C (en) 2007-04-28 2007-04-28 Continuously absorbing and rectifying organic waste recovering method

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CNB200710052010XA CN100490945C (en) 2007-04-28 2007-04-28 Continuously absorbing and rectifying organic waste recovering method

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CN100490945C true CN100490945C (en) 2009-05-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103349872A (en) * 2013-07-08 2013-10-16 安徽东冠器械设备有限公司 Laboratory solid particle processing system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220116284A (en) * 2019-12-26 2022-08-22 도요보 가부시키가이샤 Organic Solvent Recovery System

Citations (5)

* Cited by examiner, † Cited by third party
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
CN2686708Y (en) * 2004-04-07 2005-03-23 马建 Intermittent serial adsorption organic waste gas continuous recovery apparatus
CN1608710A (en) * 2003-10-20 2005-04-27 中国石油化工股份有限公司 Active carbon fiber device and method for adsorbing, recovering and treating organic waste gas
CN1883759A (en) * 2005-06-22 2006-12-27 福建大拇指环保科技有限公司 Automatic reclaiming process for industrial organic exhaust gas

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
CN1608710A (en) * 2003-10-20 2005-04-27 中国石油化工股份有限公司 Active carbon fiber device and method for adsorbing, recovering and treating organic waste gas
CN2686708Y (en) * 2004-04-07 2005-03-23 马建 Intermittent serial adsorption organic waste gas continuous recovery apparatus
CN1883759A (en) * 2005-06-22 2006-12-27 福建大拇指环保科技有限公司 Automatic reclaiming process for industrial organic exhaust gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103349872A (en) * 2013-07-08 2013-10-16 安徽东冠器械设备有限公司 Laboratory solid particle processing system

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