CN101199913A - Absorption processing system of volatile organic compounds - Google Patents

Absorption processing system of volatile organic compounds Download PDF

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Publication number
CN101199913A
CN101199913A CNA2006101611968A CN200610161196A CN101199913A CN 101199913 A CN101199913 A CN 101199913A CN A2006101611968 A CNA2006101611968 A CN A2006101611968A CN 200610161196 A CN200610161196 A CN 200610161196A CN 101199913 A CN101199913 A CN 101199913A
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volatile organic
desorption
fluidisation
heat
processing system
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CNA2006101611968A
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蔡铭昇
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Abstract

The invention provides a novel adsorption treatment system for volatile-organic-compound waste gas, mainly for solving the problem that the traditional active-carbon flow-type adsorption device along with a condensation recovery device may cause secondary pollution of the waste solution and big energy consumption. The invention is characterized in that volatile organic compound (VOC) is adsorbed in a fluidized way by granule-shaped active carbon and then sent to fluidized desorption bed for desorption by adopting the hot gas produced by a heat exchanger and a positive pressure windmill; the desorbed VOC of high concentration uses back-drafting windmill for entering a VOC oxidation heater; the VOC is urged to relieve the heat after being pyrolyzed in high temperature; then the heat is recovery and provides for the devices mentioned above. As the active carbon used for adsorption and desorption in the system of the invention is completely separated, with the nitrogen fire-extinguishing mechanism arranged and the heat source can be produced by the combustibility of the waste gas discharged during the production instead of using gas or heavy oil, the cost is reduced and the processing efficiency of the discharge standard for the environmental protection is quite high, so that the industrial competitive advantage can be improved greatly.

Description

The absorption processing system of volatile organic compounds
Technical field
(Volatile Organic Componds, VOCs) the adsorption treatment technology of waste gas, this technology relate to a kind of brand-new activated carbon regeneration and the system of recovery heat to the present invention relates to a kind of volatile organic matter.Specifically, thereby relate to a kind of can cutting down the consumption of energy, and can not cause the active carbon adsorption treatment system of the volatile organic compounds of secondary pollution acting as a fuel after the volatile organic compounds cracking.
Background technology
VOC (Volatile Organic Componds, VOCs) maximum use classes is an organic solvent, and be widely used in various industries, as the dilution and the cleaning of the solvent recovery of application industry, paint industry, chemical industry and semiconductor packages industry and semiconductor manufacturing industry, photoelectricity industry.
The main kind of domestic organic solvent commonly used comprises at present: (1) alcohols-methyl alcohol, isopropyl alcohol, butanols and isobutanol etc.(2) ketone-acetone, butanone, cyclohexanone etc.(3) ester class-ethyl acetate, butyl acetate.(4) chlorinated solvents-chloroform, carbon tetrachloride, carrene etc.(5) other-benzene,toluene,xylene etc.And the key property of VOC in environment, safety and health aspect has (1) toxic.(2) derivative air pollution.(3) depletion of the ozone layer.Therefore (4) explosivity must have suitable treatment technology for VOC, and it is subjected to the control of national law institute.
Be divided into recovery property and two kinds of destructivenesses about the VOC control technology, the former uses active carbon adsorption always, and the desorption condensation is reclaimed again, and it exists the problem and the activated carbon discarded object problem of solvent slop formation deriving pollutant, and treatment effeciency is not good; The latter is commonly used directly to be incinerated and catalyst incineration technology, but must use a large amount of fuel that the shortcoming of power consumption is arranged, and the pollution problem that the back of burning is caused is also difficult; So, its not most desirable part is arranged all with present two kinds of treatment technologies being habitually practised.
Summary of the invention
The object of the present invention is to provide a kind of absorption processing system of volatile organic compounds, this system is the system that a kind of brand-new activated carbon regeneration also can be reclaimed heat, this system mainly is with volatile organic matter VOC waste gas, utilize the bead activated carbon to give fluidisation absorption, and employing heat exchanger, malleation windmill generation hot gas is sent into fluidisation desorption bed and is carried out desorption, again the high concentration VOC behind the desorption is utilized the pumpback windmill to enter VOC oxidation heater, short this VOC will be provided for the aforesaid heat exchangers device again because of the Pintsch process release heat after this heat recovery; The characteristics of this system are that absorption separates fully with desorption, and has the nitrogen extinguishing security mechanism, especially running cost is low (utilizes the VOC waste gas combustible of producing discharging to burn characteristic, use to produce the thermal source supply system, and must not use gas or heavy oil to cause secondary pollution), treatment effeciency height (reclaiming the optimization that discharges heat reaches environmental emission standard), more significantly improve the inter-industry competition advantage.
Specifically, the absorption processing system of a kind of volatile organic compounds of the present invention is characterized in that, comprising:
Fluidisation adsorbent bed: volatile organic compounds is sent into by fluidisation adsorbent bed bottom one side, the suction-operated of equally distributed bead activated carbon in a succession of punched-plate in top, the volatile organic matter pollutant is adsorbed removal, and make and remove purifying air behind the volatile organic matter by discharging this fluidisation adsorbent bed top, behind a large amount of volatile organic contaminants of active carbon adsorption, will drop because of the proportion increase and discharge by fluidisation adsorbent bed bottom one side;
Fluidisation desorption bed: the activated carbon that is adsorbed with volatile organic contaminant is sent into by this fluidisation desorption bed top one side, and the hot blast after will heating is imported by a side, be provided with a plurality of punched-plates of consecutive in it, make the volatile organic contaminant that is adsorbed in activated carbon be able to desorption, the volatile organic contaminant that desorption goes out is delivered to the recovery annealing device by top output, sends back to after then being exported by the below as for the clean activated carbon of regeneration again and continues in the fluidisation adsorbent bed to use;
Reclaim annealing device: work as fuel from the high concentration volatile organic matter of aforesaid fluid desorption bed desorption output in order to continue supply, produce high temperature via the heating pyrolyze volatile organic matter, and utilize the combustion characteristics of this volatile organic matter to give birth to heat, to reclaim this heat.
Wherein, this fluidisation adsorbent bed comprises the first activated carbon delivery pump; This fluidisation desorption bed comprises the second activated carbon delivery pump; And this recovery annealing device further comprises malleation windmill, desorption column heater, pumpback windmill, volatile organic matter oxidation heater and heat exchanger.
Now further conjunction with figs. is to illustrate preferred embodiment of the present invention, the present invention being had more deep and concrete understanding.
Description of drawings
Fig. 1 is a single unit system schematic diagram of the present invention.
Drawing reference numeral explanation: fluidisation adsorbent bed 1; Punched-plate 10; The first activated carbon delivery pump 11; Fluidisation desorption bed 2; Punched-plate 20; The second activated carbon delivery pump 21; Reclaim annealing device 3; Malleation windmill 30; Desorption column heater 31; Pumpback windmill 32; VOC oxidation heater 33; Heat exchanger 34; Separate plate 341; Nitrogen 35.
The specific embodiment
Seeing also shown in Figure 1ly, is the absorption processing system of the volatile organic compounds of a preferred embodiment of the present invention, i.e. the system diagram of heat is reclaimed in activated carbon regeneration, and its composition comprises at least:
Fluidisation adsorbent bed 1 mainly utilizes the big characteristic of activated carbon specific area (100-1000m2/g), produces the mobile adsorption effect that increases of large tracts of land and reaches the statutory standard that discharges clean air; Shown in figure, after VOC waste gas is sent into by fluidisation adsorbent bed 1 bottom one side, the suction-operated of equally distributed bead activated carbon in a succession of punched-plate 10 in top, the VOC pollutant is adsorbed removal, and the air behind the purification VOC is discharged by this fluidisation adsorbent bed 1 top, behind active carbon adsorption lot of V OC pollutant, will drop because of the proportion increase and discharge by fluidisation adsorbent bed 1 bottom one side; And this fluidisation adsorbent bed 1 is equipped with the first activated carbon delivery pump 11, utilizes the air compress mode to supply activated carbon separately and is sent into by fluidisation adsorbent bed 1 one sides tops, in case take place when unusual, this first activated carbon delivery pump 11 can stop to carry.
Fluidisation desorption bed 2, shown in figure, the activated carbon of absorption VOC pollutant is sent into by fluidisation desorption bed 2 tops one side, and will heat the about 240 ℃ hot blast in back is imported by a side, in fluidisation desorption bed 2, be provided with a plurality of punched-plates 20 of consecutive equally, and the outside second activated carbon delivery pump 21 that also is equipped with independent conveying utilizes the air compression to make activated carbon reach the conveying purpose; This fluidisation desorption bed 2 utilizes the principle mode that is same as fluidisation adsorbent bed 1 as described above, make the VOC pollutant that is adsorbed in activated carbon be able to desorption, the VOC pollutant that desorption goes out is delivered to by top output and is reclaimed annealing device 3, sends back to after then being exported by the below as for the clean activated carbon of regeneration again and continues in the fluidisation adsorbent bed 1 to use.
Reclaim annealing device 3, continue supply and work as fuel from the high concentration VOC of aforesaid fluid desorption bed 2 desorptions output, heating pyrolyze VOC produces high temperature, and the 1kg of VOC can produce average 6000kcal heat, and this installs recyclable these heats.It is formed shown in drawing, and it further comprises:
Malleation windmill 30 when extraneous air (about 25 ℃ of normal temperature) enters malleation windmill 30 after the hot preheating of the recovery of heat exchanger 33, and is sent into the desorption air in the desorption column heater 31 by the normal pressure of malleation windmill 30;
Desorption column heater 31, utilize desorption temperature (240 ℃ of the desorption temperatures of electric heating mode of heating control desorption air, oxidizing temperature is more than 800 ℃), and only need a little electric weight just the desorption air can be heated to required desorption temperature immediately, send into again in the fluidisation desorption bed 2; For example need the 35KW/HR electric weight when 20 ℃ are heated to 220 ℃ when 1CMM air mass flow temperature, equal to reclaim the energy because of reclaiming heat, are practices of quite economizing the energy so reclaim heat through heat exchanger 33; When 500CMM air mass flow VOC is the burning of isopropyl alcohol IPA 300ppm concentration, can produce the 22KW/HR electric weight, therefore utilize the characteristic of this reclaiming energy will make its operating process economize the energy more;
Pumpback windmill 32 with the VOC outlet pumpback of fluidisation desorption bed 2, through heat exchanger 34 effects, reclaims heat again and makes the electric weight output slightly of 33 needs of VOC oxidation heater, and economizing with tool can effect.
VOC oxidation heater 33, utilize electric heating or fuel mode of heating, being heated to 800 ℃ makes all VOC can finish cracking (as long as produce carbon dioxide and water because of present all VOC bond energy have just can decompose fully more than 800 ℃, and carbon dioxide and water after decomposing can be disposed in the atmosphere because of nuisanceless problem); It mainly uses and carries out reaching behind the fluid desorption samming by fluidisation desorption bed 2 and produce high concentration VOC and work as fuel, in sending into this VOC oxidation heater 33, heat to 800 ℃ of high temperature and can satisfy this VOC cracking condition, be enough to produce suitable heat (VOC of 1kg produces average approximately 6000kcal heat), and export heat exchanger 34 these heats of recovery to;
Heat exchanger 34 after the heat of VOC oxidation heater 33 complete cracking generations reclaims most of heat energy via heat exchanger 34, can reach Geng Sheng and reach the more effect of environmental protection; This heat exchanger 33 is depicted as upper and lower UNICOM according to drawing, dotted line is for separating plate 341, its upper and lower part all is the hot gas of temperature more than 800 ℃ that utilizes VOC oxidation heater 33 to discharge, utilize heat exchanger 34 as shell-tube type, pipe is that 800 ℃ of high temperature, outer tube are extraneous air in it, and heat is reclaimed in the extraneous air preheating, will reduce the output of primary heater electric weight, even utilize and to reclaim heat fully and transfer the renewable sources of energy to, and reach the energy effect of province fully of no electric weight output; Heat exchanger 33 first halves also are to utilize this practice that the about 240 ℃ desorption air of desorption temperature of fluidisation desorption bed 2 outputs is added to more than 500 ℃ as secondary recovery hot again, reduce the electric weight output of oxidation heater 33 once more.
Hot system is reclaimed in activated carbon of the present invention regeneration according to above-mentioned composition, when its on reality is implemented, can be divided into three processes substantially and carry out, be i.e. fluidisation absorption, fluidisation desorption and reclaim heat treatment.Wherein: fluidisation absorbed portion and prior art and indifference, and particularly:
Fluidisation desorption and recovery heat treatment two parts are the place of technical characterictic.In other words, fluidisation desorption bed 2 comprises in the activated carbon desorption process: input is done pre-heat effect through heat exchanger 34 to extraneous air, and desorption column heater 31 is heated to desorption temperature to it after lowering; The primary heater desire of supply VOC oxidation heater 33 is heated to 800 ℃ of required part energy with VOC, to lower its electric weight output; And heat exchanger 33 first halves are the about 240 ℃ desorption air of desorption temperature of fluidisation desorption bed 2 output, and secondary recovery hot is heated more than the process to 500 ℃, to reduce the electric weight output of oxidation heater 33.
The above-mentioned required energy or the heats of device such as fluidisation desorption bed 2, desorption column heater 31, VOC oxidation heater 33, heat exchanger 34 that comprise, partly or entirely can directly provide by the recovery heat that reclaims annealing device 3, so, reach province and can conform with economic real benefit again.
In addition, when spending greater than 450 if any abnormal temperature when the high temperature desorption, enter in the fluidisation desorption bed as lot of V OC and to produce high temperature, utilize inert nitrogen gas 35 to reduce the air oxygen content this moment, and reach the effect of hypoxemia fire extinguishing.
Because hot system is reclaimed in activated carbon of the present invention regeneration, overcome the absorption of traditional active carbon flow-type and cooperated condensation to reclaim the solvent slop secondary pollution that produces, and condensation a large amount of electric weight of palpus consumption, and other pollutant of can not deriving.And overcome traditional zeolite runner must be a large amount of the fuel and the nitrogen oxide secondary pollution of deriving, and the zeolite runner safety problem that has the high boiling VOC of coating (coating) to produce burning other pollutant of more can not deriving, because absorption and the employed activated carbon of desorption are to separate fully and the nitrogen extinguishing security mechanism arranged in the system of the present invention, and utilize production exhaust gas discharged VOC incendivity characteristic to produce thermal source, and must not use gas or heavy oil to cause secondary pollution, running cost reduces, and the treatment effeciency of environmental emission standard is quite high, can significantly improve the inter-industry competition advantage completely.
It should be noted that the above is preferred embodiment of the present invention, as the change of doing according to conception of the present invention, when the function of its generation, effect did not exceed spiritual that specification and accompanying drawing contain yet, all should belong in the scope of the present invention.

Claims (10)

1. the absorption processing system of a volatile organic compounds is characterized in that, comprising:
Fluidisation adsorbent bed: volatile organic compounds is sent into by fluidisation adsorbent bed bottom one side, the suction-operated of equally distributed bead activated carbon in a succession of punched-plate in top, the volatile organic matter pollutant is adsorbed removal, and make and remove purifying air behind the volatile organic matter by discharging this fluidisation adsorbent bed top, behind a large amount of volatile organic contaminants of active carbon adsorption, will drop because of the proportion increase and discharge by fluidisation adsorbent bed bottom one side;
Fluidisation desorption bed: the activated carbon that is adsorbed with volatile organic contaminant is sent into by this fluidisation desorption bed top one side, and the hot blast after will heating is imported by a side, be provided with a plurality of punched-plates of consecutive in it, make the volatile organic contaminant that is adsorbed in activated carbon be able to desorption, the volatile organic contaminant that desorption goes out is delivered to the recovery annealing device by top output, sends back to after then being exported by the below as for the clean activated carbon of regeneration again and continues in the fluidisation adsorbent bed to use;
Reclaim annealing device: work as fuel from the high concentration volatile organic matter of aforesaid fluid desorption bed desorption output in order to continue supply, produce high temperature via the heating pyrolyze volatile organic matter, and utilize the combustion characteristics of this volatile organic matter to give birth to heat, to reclaim this heat.
2. the absorption processing system of volatile organic compounds as claimed in claim 1, wherein the fluid adsorption bed is provided with the independently first activated carbon delivery pump.
3. the absorption processing system of volatile organic compounds as claimed in claim 1 is characterized in that, fluidisation desorption bed is provided with the independently second activated carbon delivery pump.
4. the absorption processing system of volatile organic compounds as claimed in claim 1 is characterized in that, this recovery annealing device further comprises malleation windmill, desorption column heater, pumpback windmill, volatile organic matter oxidation heater and heat exchanger.
5. the absorption processing system of volatile organic compounds as claimed in claim 4 is characterized in that, the malleation windmill is to be used for extraneous air is sent in the desorption column heater after the hot preheating of the recovery of heat exchanger.
6. the absorption processing system of volatile organic compounds as claimed in claim 4, it is characterized in that, the desorption column heater is the desorption temperature that utilizes electric heating mode of heating control desorption air, and with the desorption air heat to required desorption temperature, send into again in the fluidisation desorption bed.
7. the absorption processing system of volatile organic compounds as claimed in claim 4 is characterized in that, the pumpback windmill be with volatile organic matter by the exit pumpback of fluidisation desorption bed, and do pre-heat effect through heat exchanger.
8. the absorption processing system of volatile organic compounds as claimed in claim 4 is characterized in that, volatile organic matter oxidation heater is to utilize electric heating or fuel mode of heating, is heated to volatile organic matter and can finishes cracking.
9. the absorption processing system of volatile organic compounds as claimed in claim 4 is characterized in that, the heat recovery of heat exchanger in order to the complete cracking volatile organic matter of oxidation heater is produced.
10. the absorption processing system of volatile organic compounds as claimed in claim 9, it is characterized in that, heat exchanger is a shell and tube heat exchanger, and high temperature, outer tube that interior pipe is in after the volatile organic matter cracking are extraneous air, thus this air of preheating and reclaim heat.
CNA2006101611968A 2006-12-11 2006-12-11 Absorption processing system of volatile organic compounds Pending CN101199913A (en)

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CN101524612B (en) * 2009-01-16 2011-08-10 刘伍雄 Device and method for recycling volatile substances by utilizing adsorbent bed
WO2011128073A2 (en) 2010-04-12 2011-10-20 Durtec Gmbh Use of granulated natural minerals as gas adsorbents for removing gaseous pollutant components
CN101676017B (en) * 2008-09-18 2012-01-11 杰智环境科技股份有限公司 Device for desorbing organic substances on line on temperature-change type fluidized floating bed
CN102371148A (en) * 2010-08-13 2012-03-14 杰智环境科技股份有限公司 Desorption tower and desorption state detection method
CN102553391A (en) * 2010-12-24 2012-07-11 承源环境科技企业有限公司 Adsorption material conveying device of solvent purification system
CN102950084A (en) * 2012-11-08 2013-03-06 广东生益科技股份有限公司 Method for reducing precipitation of organic matter in hot wind of gluing machine
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CN106621703A (en) * 2016-12-07 2017-05-10 神华集团有限责任公司 VOCs adsorption treatment device
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CN112090233A (en) * 2020-09-22 2020-12-18 夏志军 Rotating mechanism for organic waste gas treatment equipment
US10913026B2 (en) 2015-05-11 2021-02-09 Enverid Systems, Inc. Method and system for reduction of unwanted gases in indoor air
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US11207633B2 (en) 2016-04-19 2021-12-28 Enverid Systems, Inc. Systems and methods for closed-loop heating and regeneration of sorbents
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CN101524612B (en) * 2009-01-16 2011-08-10 刘伍雄 Device and method for recycling volatile substances by utilizing adsorbent bed
WO2011128073A2 (en) 2010-04-12 2011-10-20 Durtec Gmbh Use of granulated natural minerals as gas adsorbents for removing gaseous pollutant components
US10086324B2 (en) 2010-05-17 2018-10-02 Enverid Systems, Inc. Method and system for improve-efficiency air-conditioning
US10730003B2 (en) 2010-05-17 2020-08-04 Enverid Systems, Inc. Method and system for improved-efficiency air-conditioning
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US10675582B2 (en) 2012-07-18 2020-06-09 Enverid Systems, Inc. Systems and methods for regenerating adsorbents for indoor air scrubbing
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US10792608B2 (en) 2015-08-24 2020-10-06 Enverid Systems, Inc. Scrubber for HVAC system
US11207633B2 (en) 2016-04-19 2021-12-28 Enverid Systems, Inc. Systems and methods for closed-loop heating and regeneration of sorbents
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US11110387B2 (en) 2016-11-10 2021-09-07 Enverid Systems, Inc. Low noise, ceiling mounted indoor air scrubber
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