CN203540289U - Treating and recovering device of organic waste gas with low concentration and large air volume - Google Patents
Treating and recovering device of organic waste gas with low concentration and large air volume Download PDFInfo
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- CN203540289U CN203540289U CN201320563920.5U CN201320563920U CN203540289U CN 203540289 U CN203540289 U CN 203540289U CN 201320563920 U CN201320563920 U CN 201320563920U CN 203540289 U CN203540289 U CN 203540289U
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Abstract
The utility model discloses a treating and recovering device of organic waste gas with low concentration and large air volume, which is designed for solving the problem that an existing device can not treat the organic waste gas with low concentration and large air volume. The treating and recovering device comprises an adsorbing system and a desorbing system, wherein the adsorbing system uses honeycomb active carbon as an adsorbing agent; the desorbing system uses hot nitrogen as desorbing gas. The adsorbing system comprises a pretreating device, an adsorber and an exhausting fan. The desorbing system comprises a nitrogen generator, a heat-exchanger first end, a surface cooler, a condensing unit, a circulating fan, a heat-exchanger second end, a heater and a secondary absorber. The treating and recovering device disclosed by the utility model is reasonable in structure and low in cost, is applicable to treating and recovering the organic waste gas with low concentration and large air volume in multiple solvents, and especially is applicable to recovering the organic solvents with high boiling point and volatility.
Description
Technical field
The utility model relates to a kind of low concentration Wind Volume VOCs treatment retracting device.
Background technology
Some industries including vehicle spray painting, printing, coating etc. all can produce organic exhaust gas, if can not finely process, the discharge of these organic exhaust gas will pollute atmospheric environment.
Organic waste gas treatment method mainly comprises that absorption and sorption purifies, adsorbs recovery, catalytic burning, accumulation of heat burning, ionization cracking etc. at present.Substantially the processing mode that adopts absorption to reclaim during recovery, the adsorbent in absorber mostly is column-shaped active carbon, NACF is inhaled.Adsorption solvent reaches after certain saturation degree, and use water vapour is adsorbent desorption.
Aforesaid way can obtain better regulation effect and income for the organic exhaust gas of little air quantity, high concentration, reduces environmental protection investments pressure.But as the large (50000m of air quantity of organic exhaust gas
3more than/h), concentration is low (mainly at 300-800mg/m
3between), solvent species is when various because the resistance of sorbent material itself, strength characteristics cause processing air quantity and be subject to larger restriction, the equipment scale totally needing is very huge, invest high, and operation and maintenance high cost.Use the method for saturated steam desorption need to consider the problems such as solvent refining, wastewater treatment requirement and steam implementation condition, restricted the popularization of improvement technology.
Utility model content
An object of the present utility model is to propose a kind of device of realizing low concentration Wind Volume VOCs treatment recovery method.
Another object of the present utility model is to propose the low concentration Wind Volume VOCs treatment retracting device of a kind of organic solvent without discharge.
For reaching this object, the utility model by the following technical solutions:
A kind of low concentration Wind Volume VOCs treatment retracting device, described device comprises adsorption system and desorption system, and described adsorption system is used Alveolate activated carbon capable as adsorbent, and described desorption system is used hot nitrogen as desorption gas.
Particularly, described adsorption system comprises at least one pretreatment unit, at least one absorber and the discharge blower fan that by pipeline, connect successively; In described absorber, adsorbent is Alveolate activated carbon capable.
Further, described adsorption system shares a pretreatment unit or each described pretreatment unit corresponding to an absorber independently.
Particularly, described desorption system comprises the nitrogen gas generator, heat exchanger first end, surface cooler, condensing unit, circulating fan, heat exchanger the second end, the heater that by pipeline, connect successively, also comprise at least one secondary adsorption device, described secondary adsorption device one end is connected to the outlet side of nitrogen gas generator outlet side and condensing unit, and the described secondary adsorption device other end is connected to heater outlet side by pipeline; Described heater outlet side is connected to absorber discharge end by pipeline; On described secondary adsorption device, be provided with by-pass line, described by-pass line is desorption fixed gas absorption pipeline; Described desorption system is provided with independently nitrogen blanketing valve road.
Further, described condensing unit comprises the condenser that is connected in described desorption system, is connected to storage tank and cold machine on described condenser.
Further, the adsorbent of loading in secondary adsorption device is Alveolate activated carbon capable or granular active carbon.
Particularly, described desorption system is closed type inner circulation structure, and described absorber connects and enters desorption system with fixing point embedded mode.
Further, on described desorption system, be also provided with nitrogen pressure monitoring and bucking-out system.
Particularly, the temperature of described hot nitrogen is 80 ℃-180 ℃.
Particularly, the temperature of described hot nitrogen is 135 ℃-155 ℃.
The utility model low concentration Wind Volume VOCs treatment retracting device is rational in infrastructure, and cost is low, has realized the efficient adsorption treatment of organic solvent and recovery.Use hot nitrogen to adsorbent desorption, desorption temperature possesses larger controllability, and absorption is reclaimed can contain constitutionally stable all conventional volatile solvents, and the higher boiling solvent flashing of defect can not process to(for) conventional absorption reclaimer is made up.And separating process does not generate waste water, only absorb a small amount of airborne moisture, can not increase solvent-refined difficulty of later stage.Use Alveolate activated carbon capable as the solvent in adsorbent absorption organic exhaust gas, can effectively process the organic exhaust gas of Wind Volume, low concentration.
Accompanying drawing explanation
Fig. 1 is the flow chart of the utility model preferred embodiment one;
Fig. 2 is point flow chart of the utility model preferred embodiment one step S30;
Fig. 3 is the structural representation of the utility model preferred embodiment one.
In figure, be labeled as:
1, discharge blower fan; 2, Alveolate activated carbon capable absorber; 3, pretreatment unit; 4, circulating fan; 6, heater; 7, secondary adsorption device; 8, surface cooler; 9, condenser; 10, cold machine; 11, storage tank; 12, pressure monitor and bucking-out system; 20, nitrogen gas generator; 51, heat exchanger first end; 52, heat exchanger the second end.
The specific embodiment
Below in conjunction with accompanying drawing and by the specific embodiment, further illustrate the technical solution of the utility model.
Alveolate activated carbon capable is a kind of novel active carbon adsorption material.Its structure shape is honeycomb seemingly, the well-regulated wind duct of crossing of tool.There are the various shapes such as triangle, square, hexagon in its straight-through duct.By different are shaped to honeycomb containing carbon source materials or powdered active carbon, it has been had advantages of compared with common active carbon as follows: one, external surface area significantly increases; Two, air drag reduces.
The increase of external surface area makes the adsorption efficiency of Alveolate activated carbon capable high, and unit volume adsorbent can be processed air quantity to be increased more than 1 times than column-shaped active carbon.Its adsorption efficiency can reach more than 90%, still can obtain good treatment effect when the concentration of organic exhaust gas is lower.The reduction of air drag, is suitable for purifying Wind Volume organic exhaust gas.In addition, air drag is low makes to drive the power consumption of blower fan to reduce, and operating cost is effectively controlled.
Preferred embodiment one:
As shown in Figure 3, this preferred embodiment provides a kind of low concentration Wind Volume VOCs treatment retracting device, and this device comprises adsorption system and desorption system.Wherein adsorption system comprises three pretreatment units 3, three Alveolate activated carbon capable absorbers 2 and discharge blower fans 1.Each pretreatment unit 3 corresponding to one independently the whole absorbers 2 of Alveolate activated carbon capable absorber 2(also can share a set of pretreatment unit 3), Alveolate activated carbon capable absorber 2 inlet and outlets possess sealed valve.
Desorption system comprises the nitrogen gas generator 20, heat exchanger first end 51, surface cooler 8, condensing unit, circulating fan 4, heat exchanger the second end 52, the heater 6 that by pipeline, connect successively, also comprises two secondary adsorption devices 7.Secondary adsorption device 7 one end are connected to the outlet side of nitrogen gas generator 20 outlet sides and condensing unit, and the other end is connected to heater 6 outlet sides by pipeline; On secondary adsorption device 7, be provided with can switch by-pass line, inlet and outlet possesses sealed valve, wherein the adsorbent of filling is Alveolate activated carbon capable or granular active carbon.By-pass line is desorption fixed gas absorption pipeline, and desorption system is provided with independently nitrogen blanketing valve road.
Heater 6 outlet sides are connected to absorber 2 discharge end by pipeline, and possess can switch by-pass line; Its surface temperature is no more than 300 ℃.Wherein, condensing unit comprises the condenser 9 that is connected in desorption system, is connected to storage tank 11 and cold machine 10 on condenser 9.The low-temperature receiver of surface cooler 9 is normal temperature recirculated water, and the low-temperature receiver of condenser is refrigeration unit.
Desorption system is closed type inner circulation structure, and Alveolate activated carbon capable absorber 2 connects and enters desorption system with fixing point embedded mode.Because pipeline is airtight, only when separating process for the first time, carry out oxygen removal process, in desorption process afterwards, in the pipeline of desorption system, remain airtight anaerobic.On desorption system, be also provided with nitrogen pressure monitoring and bucking-out system 12, for supplement nitrogen in pipeline, coordinate assurance system in slight positive pressure state with pressure detecting system.Alveolate activated carbon capable absorber 2 and secondary adsorption device 7 are fixed bed.
Alveolate activated carbon capable absorber 2 air intake valve inside tube roads are connected with desorption system admission line, and pipeline is connected with desorption system discharge duct inside Alveolate activated carbon capable absorber 2 valve for air exhausts; Inside secondary adsorption device 7 air intake valves, pipeline is connected with desorption system admission line, and pipeline is connected with desorption system discharge duct inside secondary adsorption device 7 drain taps.
Workflow: as shown in Figure 1, this workflow comprises the steps:
Pipeline and all the cross wind device of step S10. to desorption system fills nitrogen, guarantees that the oxygen-content reduction of nitrogen is to safety margin.Start to fill after nitrogen, pipeline air is ejected and is discharged from the cut-out cock being connected with absorber, and Exhaust Gas carries out oxygen concentration monitoring by oxygen content detector.When oxygen content is reduced to after setting value, close emptying valve and close nitrogen simultaneously and enter valve.
Organic exhaust gas through nonwoven fabric filter de-dirt and cooling, dewater, enter Alveolate activated carbon capable absorber 2 after the pretreatment such as deacidification, in Alveolate activated carbon capable absorber 2, carry out adsorption cleaning.Tail gas after purification directly discharges by discharge blower fan 1.
Step S20. reaches setting breakthrough concentration when reaching Alveolate activated carbon capable absorber 2 after setting-up time, and absorber stops absorption, enters separating process state.Alveolate activated carbon capable absorber 2 adsorbs to organize circulation pattern more--desorption operation.
The absorber for the treatment of desorption fills nitrogen deoxygenation, by the oxygen concentration of oxygen content detector monitoring institute Exhaust Gas.When the interior oxygen content of Alveolate activated carbon capable absorber 2 until desorption stops filling nitrogen after setting value.
Step S30 and step S40, as shown in Figure 2, heater 6 power transmissions or send oil to be warming up to after rated temperature, ON cycle blower fan 4.After circulation wind speed is stable, regulate heater 6 power to the Alveolate activated carbon capable absorber 2 entrance wind-warm syndrome for the treatment of desorption to reach design temperature.Step S31, nitrogen enters surface cooler 8 and condenser 9 after heat exchanger heat exchange cooling, then through blower fan, heat exchanger intensification, secondary adsorption device 7 bypass, gets back to heater 6, continuous circulation desorption.The temperature of hot nitrogen is 80 ℃-180 ℃; Preferred range is 135 ℃-155 ℃.Step S32, when solvent strength in hot nitrogen is through accumulating continuously and exceeding the dew point under condensation temperature, solvent starts to condense and by being recycled after storage tank 11.
Step S33, the solvent in the absorber of detachment status continues heat supply by hot nitrogen and constantly by desorption out and condensation.After certain hour, the absorber exit concentration of hot nitrogen desorption Efficiency Decreasing, detachment status reduces gradually, condensation yield reduces or disappears.This interval scale desorption enters the poor efficiency stage, and in detachment status absorber, solvent storage is little, and systemic circulation proceeds to cleansing phase.Step S34 and step S35, open secondary adsorption device 7 air inlet/outlet valves and close bypass, makes condensed nitrogen enter secondary adsorption device 7 and carry out adsorption cleaning, forms compared with small concentration or without the normal temperature nitrogen of concentration.After heating up compared with the desorption circulating air of small concentration (cooled normal temperature nitrogen) heater via 6, continue separating process, continuously solvent residual in the absorber of detachment status is transferred to secondary adsorption device 7.
The absorber of detachment status stops the heating of heater 6 after being completed by hot nitrogen desorption.Wind is crossed in other 6 tunnels of heater and heat exchanger bypass, makes heat in the absorber of detachment status can be recycled continuously that gas is taken out of and is lowered the temperature by surface cooler 8 and condenser 9.A small amount of solvent residual in gas is held back by 7 absorption of secondary adsorption device.Step S40 finishes.
Step S50. judges that whether VOCs treatment is complete.It is termination routine; Otherwise repeating step S10 is to step S40.
This preferred embodiment adopts Alveolate activated carbon capable as adsorbent; and use hot nitrogen separating process; when reducing process procedure and equipment cost, avoid waste water and solvent refining that conventional absorption is reclaimed to process problem; entirety energy consumption comparison conventional granulates active carbon or carbon fiber adsorption and catalytic combustion reclaim and reduce more than 40%, and equal air quantity waste gas pollution control and treatment cost is more than 50%.The deoxidation of desorption recovery system comprises circulation line deoxidation and two execution steps of absorber deoxidation, and deoxidization technique is carried out better, is easy to arrive desorption standard in pipeline.
Preferred embodiment two:
This preferred embodiment equipment therefor comprises adsorption system and desorption system, and adsorption system is used Alveolate activated carbon capable as adsorbent, and desorption system is used hot nitrogen as desorption gas.
Workflow: use Alveolate activated carbon capable as the solvent in adsorbent absorption organic exhaust gas, use hot nitrogen to adsorbent desorption when the solvent in adsorbent reaches the intensity value of setting.Hot nitrogen to adsorbent desorption after continue circulation; When contained solvent in hot nitrogen reaches under normal temperature solidifying doing well, condense and reclaim the solvent in hot nitrogen.
Claims (10)
1. a low concentration Wind Volume VOCs treatment retracting device, described device comprises adsorption system and desorption system, it is characterized in that, and described adsorption system is used Alveolate activated carbon capable as adsorbent, and described desorption system is used hot nitrogen as desorption gas.
2. low concentration Wind Volume VOCs treatment retracting device according to claim 1, is characterized in that: described adsorption system comprises at least one pretreatment unit (3), at least one absorber (2) and the discharge blower fan (1) that by pipeline, connect successively; In described absorber, adsorbent is Alveolate activated carbon capable.
3. low concentration Wind Volume VOCs treatment retracting device according to claim 2, is characterized in that: described adsorption system shares a pretreatment unit (3) or each described pretreatment unit (3) corresponding to an absorber (2) independently.
4. low concentration Wind Volume VOCs treatment retracting device according to claim 1, is characterized in that: described desorption system comprises the nitrogen gas generator (20), heat exchanger first end (51), surface cooler (8), condensing unit, circulating fan (4), heat exchanger the second end (52) and the heater (6) that by pipeline, connect successively; Also comprise at least one secondary adsorption device (7), described secondary adsorption device (7) one end is connected to the outlet side of nitrogen gas generator (20) outlet side and condensing unit, and described secondary adsorption device (7) other end is connected to heater (6) outlet side by pipeline; Described heater (6) outlet side is connected to absorber (2) discharge end by pipeline; On described secondary adsorption device (7), be provided with by-pass line, described by-pass line is desorption fixed gas absorption pipeline; Described desorption system is provided with independently nitrogen blanketing valve road.
5. low concentration Wind Volume VOCs treatment retracting device according to claim 4, is characterized in that: described condensing unit comprises the condenser (9) that is connected in described desorption system, is connected to storage tank (11) and cold machine (10) on described condenser (9).
6. low concentration Wind Volume VOCs treatment retracting device according to claim 4, is characterized in that: the adsorbent of loading in secondary adsorption device is Alveolate activated carbon capable or granular active carbon.
7. low concentration Wind Volume VOCs treatment retracting device according to claim 1, is characterized in that: described desorption system is closed type inner circulation structure, and described absorber connects and enters desorption system with fixing point embedded mode.
8. low concentration Wind Volume VOCs treatment retracting device according to claim 7, is characterized in that: on described desorption system, be also provided with nitrogen pressure monitoring and bucking-out system (12).
9. low concentration Wind Volume VOCs treatment retracting device according to claim 1, is characterized in that: the temperature of described hot nitrogen is 80 ℃-180 ℃.
10. low concentration Wind Volume VOCs treatment retracting device according to claim 1, is characterized in that: the temperature of described hot nitrogen is 135 ℃-155 ℃.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190206A (en) * | 2014-09-28 | 2014-12-10 | 镇江华域环保设备制造有限公司 | Recovery device for organic matter-containing exhaust |
| CN104801148A (en) * | 2015-04-16 | 2015-07-29 | 王新洲 | Environment-friendly treatment and recovery method and device for industrial waste gas containing VOCs (volatile organic compounds) |
| CN105582688A (en) * | 2014-10-29 | 2016-05-18 | 石家庄天龙环保科技有限公司 | High-efficiency purification and heat energy utilization method for volatile organic compound-containing gas |
| CN106422647A (en) * | 2016-11-15 | 2017-02-22 | 杭州捷瑞空气处理设备有限公司 | Low-liquidus-temperature organic waste gas recycling apparatus |
| CN108096993A (en) * | 2018-01-30 | 2018-06-01 | 洛阳天宝环保科技有限公司 | A kind of caching absorber absorption air separator of oxygenerator and recovery method |
| CN105688596B (en) * | 2016-04-13 | 2018-06-08 | 沈阳环境科学研究院 | A kind of multicomponent VOCs adsorption condensing retracting devices |
| CN116492809A (en) * | 2023-05-22 | 2023-07-28 | 华澄(江门)环保装备科技有限公司 | Waste gas fixed bed desorption energy-saving device |
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2013
- 2013-09-11 CN CN201320563920.5U patent/CN203540289U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190206A (en) * | 2014-09-28 | 2014-12-10 | 镇江华域环保设备制造有限公司 | Recovery device for organic matter-containing exhaust |
| CN105582688A (en) * | 2014-10-29 | 2016-05-18 | 石家庄天龙环保科技有限公司 | High-efficiency purification and heat energy utilization method for volatile organic compound-containing gas |
| CN104801148A (en) * | 2015-04-16 | 2015-07-29 | 王新洲 | Environment-friendly treatment and recovery method and device for industrial waste gas containing VOCs (volatile organic compounds) |
| CN105688596B (en) * | 2016-04-13 | 2018-06-08 | 沈阳环境科学研究院 | A kind of multicomponent VOCs adsorption condensing retracting devices |
| CN106422647A (en) * | 2016-11-15 | 2017-02-22 | 杭州捷瑞空气处理设备有限公司 | Low-liquidus-temperature organic waste gas recycling apparatus |
| CN106422647B (en) * | 2016-11-15 | 2022-10-04 | 杭州捷瑞空气处理设备有限公司 | Low liquefaction temperature organic waste gas recovery device |
| CN108096993A (en) * | 2018-01-30 | 2018-06-01 | 洛阳天宝环保科技有限公司 | A kind of caching absorber absorption air separator of oxygenerator and recovery method |
| CN108096993B (en) * | 2018-01-30 | 2023-10-20 | 洛阳天宝环保科技有限公司 | Device and method for recycling organic waste gas absorbed by buffer absorber |
| CN116492809A (en) * | 2023-05-22 | 2023-07-28 | 华澄(江门)环保装备科技有限公司 | Waste gas fixed bed desorption energy-saving device |
| CN116492809B (en) * | 2023-05-22 | 2023-12-22 | 华澄(江门)环保装备科技有限公司 | Waste gas fixed bed desorption energy-saving device |
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