CN207928880U - Organic exhaust gas recycling and processing device - Google Patents
Organic exhaust gas recycling and processing device Download PDFInfo
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- CN207928880U CN207928880U CN201721875641.7U CN201721875641U CN207928880U CN 207928880 U CN207928880 U CN 207928880U CN 201721875641 U CN201721875641 U CN 201721875641U CN 207928880 U CN207928880 U CN 207928880U
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Abstract
A kind of organic exhaust gas recycling and processing device, including filter（1）, cooler（2）, vacuum pump（3）, absorption valve（4）, desorption valve（5）, suction/desorption tank（7）, exhaust blower（8）And PLC control system（9）；Solvent exhaust gas is sent into recovery system air collecting box through collecting, and passes through filter（1）And cooler（2）After pretreatment, then is pumped by centrifugal high pressure fan and enter suction/desorption tank equipped with activated carbon（7）It is inside adsorbed, the tail gas of emission request is reached after absorption by suction/desorption tank（7）Top discharge mouth passes through exhaust blower（8）Drain into air；It adsorbs after a certain period of time, when suction/desorption tank（7）When top will penetrate, system starts vacuum pump automatically（3）Suction desorption is carried out, activated carbon is made to be regenerated, absorption and desorption pass through PLC control system（9）Control absorption valve（4）With desorption valve（5）It is automatically performed；Then vacuum pump（3）It extracts high concentration solvent exhaust gas out, passes sequentially through three-level condensation unit and handled, liquid is then dissolved by way of hot gas defrosting and is recycled by solvent tank.The device can improve the treatment effect of organic exhaust gas recycling and processing device, reduce operating cost.
Description
Technical field
The utility model belongs to exhaust-gas treatment field, and in particular to a kind of organic exhaust gas recycling and processing device.
Background technology
Benzene homologues will produce a large amount of evaporating loss in glue production line, and the steam for evaporating generation is directly discharged to air
In, mass energy can be caused to waste while can also be caused to poison to human body；On the other hand, after flammable escaping gas is formed not
But there is serious security risk, and photochemical fog can be formed under ultraviolet light irradiation, cause environmental pollution.
It is concentrated mainly on glue production line according to the harmful exhaust of gluing production technology, discharge, the master of exhaust gas discharge
Want ingredient for toluene or dimethylbenzene, wherein 110.6 DEG C of toluene boiling point, -95 DEG C of molten point, density 0.8667, explosion limit 1.2~
7.0%, it is not soluble in water, it is dissolved in a variety of organic solvents；Toluene has certain toxicity, steam to have stimulation to make human skin, mucous membrane
With, while Central nervous system has anesthetic effect, long term that can influence hepatic and renal function.Dimethylbenzene is a kind of water white transparency liquid
Body has the smell of similar toluene.144.4 DEG C of boiling point, -25.5 DEG C of fusing point, the density 0.88 of opposite water, explosion limit 1.0~
7.0%, it is not soluble in water, it is miscible in a variety of organic solvents；Dimethylbenzene has a moderate toxicity, steam except damage human body mucous membrane,
Outside respiratory tract, excited, anesthetic effect is also presented.
Benzene class volatility is low, therefore discharge gas organic component concentration during gluing is relatively low, to adapt to organic waste
The development trend of gas comprehensive treatment needs to develop the Processing tecchnics for adapting to low concentration VOCs gas characteristics, increasingly tight meeting
Under the premise of the discharge standard of lattice, the operation energy consumption of processing unit is reduced, improves the reliability of device.
The processing method of organic exhaust gas mainly has absorption process, active carbon adsorption, combustion method, condensation method, low-temperature plasma
Method and photocatalytic method.But considers from the selection of absorbent, processing gas concentration, cost, treatment effect etc., be applied to gluing
The environment protection treating of the exhaust gas of production line, above method have certain limitation when being used alone.Various processing methods it is reasonable
Change and combine, deficiency existing for single treatment method can be made up, preferably meet the processing requirement of glue production line exhaust gas.
Invention content
The purpose of this utility model is that the characteristics of for glue production line exhaust gas, adsorbed using micro-positive pressure, negative pressure parsing
（Desorption）In conjunction with the operation process that deep cooling recycles, advantageous absorption and desorption conditions are built for activated carbon, to improve organic exhaust gas
The treatment effect of recycling and processing device reduces operating cost.Make up the deficiency that existing treatment technology is used alone, particular technique side
Case is as follows：
A kind of organic exhaust gas recycling and processing device, including filter 1, cooler 2, vacuum pump 3, absorption valve 4, desorption valve
Door 5, suction/desorption tank 7, exhaust blower 8 and PLC control system 9；Solvent exhaust gas is sent into recovery system air collecting box through collecting, and passes through
After filter 1 and cooler 2 pre-process, then pumps to enter in suction/desorption tank 7 equipped with activated carbon by centrifugal high pressure fan and be inhaled
Attached, the tail gas that emission request is reached after absorption drains into air by 7 top discharge mouth of suction/desorption tank by exhaust blower 8；Absorption is certain
After time, when 7 top of suction/desorption tank will penetrate, system starts vacuum pump 3 and carries out suction desorption automatically, and activated carbon is made to obtain
To regeneration, absorption and desorption are automatically performed by the control of PLC control system 9 absorption valve 4 and desorption valve 5；Then vacuum pump 3
It extracts high concentration solvent exhaust gas out, passes sequentially through three-level condensation unit and handled, then dissolved by way of hot gas defrosting
Liquid is recycled by solvent tank.
Further, it is respectively equipped with the switching of two plate heat exchangers 10 for three-level condensation unit to use, two board-like to change
Pipeline switching between hot device 10 is realized by cooling line switching valve 11.
Further, the suction/desorption tank 7 includes at least two tanks, and adsorption and desorption alternately, moves in circles, to ensure
The continuous recycling of solvent exhaust gas.
Further, the organic exhaust gas recycling and processing device further includes thermocouple 6, the suction/7 active carbon bed of desorption tank
Equipped with temperature measuring point, thermometric is carried out in temperature measuring point by thermocouple 6, to ensure recycling and processing device operational safety.
Further, the organic exhaust gas recycling and processing device also installs centrifugal blower motor inverter additional, with useless according to difference
Gas discharge capacity carries out frequency modulation speed change.
Further, the organic exhaust gas is toluene or dimethylbenzene.
Further, the high-concentration waste gas that vacuum pump 3 is extracted out enters the board-like of level-one condensation unit after gas-liquid separator
Heat exchanger 10 is cooled to 0 DEG C or so by room temperature herein while part toluene or dimethylbenzene is precipitated, and then exhaust gas enters two level
Unit is condensed, is further cooled upon -30 DEG C, three-level condensation unit is subsequently entered, is cooled to -70 DEG C, at this time first in exhaust gas
The concentration of benzene or dimethylbenzene is less than 20mg/m3, reach discharge standard..
Further, solvent exhaust gas filter screen crushing monitoring function is arranged in the organic exhaust gas recycling and processing device, works as filtering
When net causes solvent exhaust gas pressure difference to change because blocking or rupturing, system sends out alarm automatically.
Further, VOCs on-line detectors are set in the certain altitude of exhaust blower 8, sampler, institute is installed in detection mouth
The gaseous sample of acquirement enters VOCs on-line detectors and carries out monitoring VOCs concentration in real time, to monitor exhaust-gas treatment effect, and
Shi Gaijin exhaust-gas treatment measures.
The advantageous effect of the application：
1, the solvent properties used in user, i.e. chemical property are stable, do not polymerize.Very using coal-based granular activated carbon
It is suitble to these solvent Volatile Gas adsorption desorption occasion repeatedly, desorption performance is very good, and natural heatproof is up to 450 DEG C, can be effectively
The regeneration effect of guarantee system, and the frequency for hot spot occur is greatly reduced, the maximum security with commercial Application.
2, it according to activated carbon adsorption characteristic, is adsorbed using micro-positive pressure, negative pressure parsing（Desorption）The operation recycled in conjunction with deep cooling
Technique builds advantageous absorption and desorption conditions, to improve the treatment effect of organic exhaust gas recycling and processing device, drop for activated carbon
Low operating cost.
3, entire recycling and processing device operational process carries out intelligent control, all temperature, pressure, stream by PLC control system
The parameters such as amount carry out real time monitoring, and provide real-time tendency and historical trend query function；Device generates in the process of running
Alarm and operation information storage, be used for the various production and operation failures of supervision and management.
Description of the drawings
1. Fig. 1 is organic exhaust gas recycling and processing device structural schematic diagram.
In figure：Filter 1；Cooler 2；Vacuum pump 3；Adsorb valve 4；Valve 5 is desorbed；Thermocouple 6；Suction/desorption tank 7；
Exhaust blower 8；PLC control system 9；Plate heat exchanger 10；Cooling line switching valve 11.
Specific implementation mode
The organic exhaust gas recycling and processing device of the utility model is described further to the utility model below in conjunction with the accompanying drawings
And its technological process.
Solvent properties used in user, i.e. chemical property are stable, do not polymerize.It is very suitable using coal-based granular activated carbon
These solvent Volatile Gas adsorption desorption occasion repeatedly is closed, desorption performance is very good, and natural heatproof is up to 450 DEG C, can effectively protect
The regeneration effect of card system, and the frequency for hot spot occur is greatly reduced, the maximum security with commercial Application.According to activity
Charcoal characterization of adsorption, is adsorbed using micro-positive pressure, negative pressure parsing（Desorption）In conjunction with the operation process that deep cooling recycles, have for activated carbon construction
Profit absorption and desorption conditions reduce operating cost to improve the treatment effect of organic exhaust gas recycling and processing device.
This patent provides a kind of organic exhaust gas recycling and processing device, including filter 1, cooler 2, vacuum pump 3, absorption valve
Door 4, desorption valve 5, thermocouple 6, suction/desorption tank 7, exhaust blower 8 and PLC control system 9；Solvent exhaust gas is sent into recycling through collecting
System air collecting box after being pre-processed by filter 1 and cooler 2, then is pumped by centrifugal high pressure fan and is entered equipped with activated carbon
It is adsorbed in suction/desorption tank 7, the tail gas that emission request is reached after absorption passes through exhaust blower by 7 top discharge mouth of suction/desorption tank
8 drain into air；After a certain period of time, when 7 top of suction/desorption tank will penetrate, system starts vacuum pump 3 and is taken out automatically for absorption
Adsorption desorption makes activated carbon be regenerated, adsorb and be desorbed by PLC control system 9 control absorption valve 4 and desorption valve 5 from
It is dynamic to complete；Then vacuum pump 3 extracts high concentration solvent exhaust gas out, passes sequentially through three-level condensation unit and is handled, then passes through heat
Toluene or dimethylbenzene are dissolved into liquid and are recycled by solvent tank by the mode of gas defrosting；Three-level condensation unit is respectively equipped with
Two switchings of plate heat exchanger 10 use, and the pipeline switching between two plate heat exchangers 10 is real by cooling line switching valve 11
It is existing.
The suction/desorption tank 7 includes at least two tanks, and adsorption and desorption alternately, moves in circles, to ensure that solvent is useless
The continuous recycling of gas.Suction/7 active carbon bed of desorption tank is equipped with temperature measuring point, thermometric is carried out in temperature measuring point by thermocouple 6, with true
Protect recycling and processing device operational safety.One of tank is for being desorbed and regenerating, and other tank parallel connections are for adsorbing.After desorption and regeneration
Automatic switchover replaces the longest tank of adsorption tanks adsorption time, and the longest tank of adsorption time is switched to desorption and regeneration, switches
Desorption tank to absorption is concatenated into first behind the shortest adsorption tanks of adsorption time, has just been desorbed using the tail gas drying of the tank
Remaining moisture content above activated carbon, the tank after drying are in parallel with other adsorption tanks again.Adsorption tanks include activated carbon adsorption layer, profit
The adsorption capacity of toluene or dimethylbenzene is adsorbed with activated carbon, the purification gas organic solvent content adsorbed reaches discharge
Standard requires in direct emission air；Adsorption tanks for absorption are preferably more than two, because being come by the switching of desorption tank, institute
Different with the time of each adsorption tanks absorbing organic solvent, the time existence time for reaching saturation is poor, first reaches the suction of saturation
Attached tank first switches to desorption tank, another desorption tank is switched to adsorption tanks after above-mentioned concatenation drying and other adsorption tanks again
Parallel connection is adsorbed together, and the mutual switching adsorbed and be desorbed all is to control absorption valve 4 and desorption valve 5 by PLC control system 9
It is automatically performed, ensures the continuity of system operation.
Specific organic gas withdrawal processing technique flow is described in detail as follows：
Production line emits solvent exhaust gas and is sent into recovery system air collecting box through collecting, pre- by filter 1 and cooler 2
Processing, the exhaust gas temperature come out from cooler 2 is down to 40~45 DEG C, then is pumped and entered equipped with activated carbon by centrifugal high pressure fan
In suction/desorption tank 7.In order to reach energy saving of system, centrifugal blower motor inverter can be installed additional, with according to different discharge amount of exhaust gas into
Row frequency modulation speed change.Solvent exhaust gas is tightly held by activated carbon when passing through active carbon layer in hole, and air then penetrates layer of charcoal.Reach
The tail gas of emission request drains into air by 7 top discharge mouth of suction/desorption tank by exhaust blower.Certain time is adsorbed, when suction/desorption
When 7 top of tank will penetrate, system starts vacuum pump 3 and carries out suction desorption automatically, and activated carbon is made to be regenerated, and vacuum pump 3 is taken out
Go out high concentration solvent（Toluene or dimethylbenzene）Exhaust gas passes sequentially through three-level condensation process, then will by way of hot gas defrosting
Toluene or dimethylbenzene dissolve into liquid and are recycled by solvent tank.
When desorption, the high-concentration waste gas that vacuum pump 3 is extracted out enters the board-like of level-one condensation unit after gas-liquid separator
Heat exchanger 10 is cooled to 0 DEG C or so by room temperature herein while part toluene or dimethylbenzene is precipitated.Then exhaust gas enters two level
Unit is condensed, is further cooled upon -30 DEG C, three-level condensation unit is subsequently entered, is cooled to -70 DEG C, at this time first in exhaust gas
The concentration of benzene or dimethylbenzene has been less than 20mg/m3, reach discharge standard.Since toluene or dimethylbenzene are adsorbed on condensation set heat exchange
Device surface can influence to exchange heat so that effect is precipitated and is deteriorated, therefore is respectively equipped with two plate-type heat-exchanges for three-level condensation unit
The switching of device 10 uses, and the pipeline switching between two plate heat exchangers 10 is realized by cooling line switching valve 11, specifically, cold
But pipeline switching valve 11 can be Pneumatic butterfly valve 3.
Finally, toluene or dimethylbenzene are dissolved into liquid by condensation units at different levels by hot gas defrosting, and weight is collected by water conservancy diversion
It is new to utilize.
Entire recycling and processing device operational process carries out intelligent control by PLC control system 9, and PLC can using DVP series
Programmable controller is connect with touch screen COM1 by RS232 mouthfuls and is communicated, realize human-computer interaction, complete all operations and
Display function；Pass through the RS485 interfaces and inverter communication of PLC simultaneously.Touch screen software carries out the real time data in PLC
It has been shown that, record, storage, processing, to meet various monitoring requirements.The parameters such as all temperature, pressure, flow carry out Real-time
Row real time monitoring, and real-time tendency and historical trend query function are provided；The alarm and operation that device generates in the process of running
Information storage is used for the various production and operation failures of supervision and management.It specifically includes：
（1）, adsorption tanks active carbon bed temperature-monitoring function and superhigh temperature fire sprinkler system
Temperature alarming, interlocking is arranged in active carbon bed.Since in absorption, temperature increases activated carbon, when desorption at a temperature of
Drop, when absorption when activated carbon temperature increase enter risk range before, control system will automatic alarm and interlock switch into
Detachment status carries out superhigh temperature fire sprinkler when necessary, it is ensured that activated carbon temperature will not continue to increase and jeopardize safety.
（2）, air pressure system monitoring function
In order to enable retracting device to realize, all valves of automation control use pneumatic control, when compressed air pressure deficiency
When, it cannot be started up running；If compressed air pressure is less than 6kg/cm in operational process2, control system can automatic alarm.
（3）Recycle gas filter screen crushing monitoring function and centrifugal blower overload protection function
In order to protect centrifugal high pressure fan motor safe operation, solvent exhaust gas filter screen crushing monitoring function is set.It has served as
When strainer causes solvent exhaust gas pressure difference to change because blocking or rupturing, system sends out alarm automatically, and operating personnel must in time more
Change filter screen.When centrifugal high pressure fan causes overload because of other reasons, system sends out alarm automatically, is automatically closed when necessary and is
System, solvent exhaust gas is by being promptly vented valve exhaust.
（4）Cooling water system hydraulic pressure deficiency alerts and super temperature-monitoring function.
In order to ensure system exchanges heat load so that can reach recovering effect, setting cooling water system hydraulic pressure deficiency alert and
Super monitoring-temperature alarm function.
（5）, vacuum pump overpressure protection apparatus
Vacuum pump is equipped with safety attachment（Negative pressure transmitter and vacuum meter）, ensure adsorption tank desorption process operational safety.
The above is only the specific embodiments of the present invention, but the design concept of the present invention is not limited thereto,
All non-essential modifications to the present invention made by this concept should all belong to the row for invading scope of protection of the utility model
For.
Claims (9)
1. a kind of organic exhaust gas recycling and processing device, it is characterised in that including filter（1）, cooler（2）, vacuum pump（3）, inhale
Attached valve（4）, desorption valve（5）, suction/desorption tank（7）, exhaust blower（8）And PLC control system（9）；Solvent exhaust gas is sent through collecting
Enter recovery system air collecting box, passes through filter（1）And cooler（2）After pretreatment, then is pumped by centrifugal high pressure fan and enter dress
The suction of active charcoal/desorption tank（7）It is inside adsorbed, the tail gas of emission request is reached after absorption by suction/desorption tank（7）It arranges at top
It puts mouth and passes through exhaust blower（8）Drain into air；It adsorbs after a certain period of time, when suction/desorption tank（7）When top will penetrate, system is certainly
It is dynamic to start vacuum pump（3）Suction desorption is carried out, activated carbon is made to be regenerated, absorption and desorption pass through PLC control system（9）Control
Adsorb valve（4）With desorption valve（5）It is automatically performed；Then vacuum pump（3）It extracts high concentration solvent exhaust gas out, passes sequentially through three-level
Condensation unit is handled, and liquid is then dissolved by way of hot gas defrosting and is recycled by solvent tank.
2. organic exhaust gas recycling and processing device according to claim 1, it is characterised in that each for three-level condensation unit
It is equipped with two plate heat exchangers（10）Switching uses, two plate heat exchangers（10）Between pipeline switching pass through cooling line
Switching valve（11）It realizes.
3. organic exhaust gas recycling and processing device according to claim 1, it is characterised in that the suction/desorption tank（7）Including
At least two tanks, adsorption and desorption alternately, move in circles, to ensure the continuous recycling of solvent exhaust gas.
4. organic exhaust gas recycling and processing device according to claim 1, it is characterised in that the organic exhaust gas recovery processing
Device further includes thermocouple（6）, the suction/desorption tank（7）Active carbon bed is equipped with temperature measuring point, passes through thermocouple（6）In thermometric
Point carries out thermometric, to ensure recycling and processing device operational safety.
5. organic exhaust gas recycling and processing device according to claim 1, it is characterised in that the organic exhaust gas recovery processing
Device also installs centrifugal blower motor inverter additional, to carry out frequency modulation speed change according to different discharge amount of exhaust gas.
6. organic exhaust gas recycling and processing device according to claim 1, it is characterised in that the organic exhaust gas be toluene or
Dimethylbenzene.
7. organic exhaust gas recycling and processing device according to claim 6, it is characterised in that vacuum pump（3）The high concentration of extraction
Exhaust gas enters the plate heat exchanger of level-one condensation unit after gas-liquid separator（10）, herein 0 DEG C is cooled to by room temperature
It controls while part toluene or dimethylbenzene is precipitated, then exhaust gas enters B-grade condensation unit, is further cooled upon -30 DEG C, connects
It into three-level and condenses unit, be cooled to -70 DEG C, the concentration of toluene or dimethylbenzene is less than 20mg/m in exhaust gas at this time3, reach
Discharge standard.
8. organic exhaust gas recycling and processing device according to claim 1, it is characterised in that the organic exhaust gas recovery processing
Solvent exhaust gas filter screen crushing monitoring function is arranged in device, when filter screen causes solvent exhaust gas pressure difference to change because blocking or rupturing
When, system sends out alarm automatically.
9. organic exhaust gas recycling and processing device according to claim 1, it is characterised in that in exhaust blower（8）Certain altitude
VOCs on-line detectors are set, sampler is installed in detection mouth, acquired gaseous sample enter VOCs on-line detectors into
Monitoring VOCs concentration improves exhaust-gas treatment measure to row in time to monitor exhaust-gas treatment effect in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721875641.7U CN207928880U (en) | 2017-12-28 | 2017-12-28 | Organic exhaust gas recycling and processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721875641.7U CN207928880U (en) | 2017-12-28 | 2017-12-28 | Organic exhaust gas recycling and processing device |
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| Publication Number | Publication Date |
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| CN207928880U true CN207928880U (en) | 2018-10-02 |
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ID=63647703
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| CN201721875641.7U Active CN207928880U (en) | 2017-12-28 | 2017-12-28 | Organic exhaust gas recycling and processing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109157944A (en) * | 2018-10-19 | 2019-01-08 | 南京工业大学 | Fractional cryogenic recovery system for VOCs (volatile organic compounds) of throttling expansion refrigeration |
-
2017
- 2017-12-28 CN CN201721875641.7U patent/CN207928880U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109157944A (en) * | 2018-10-19 | 2019-01-08 | 南京工业大学 | Fractional cryogenic recovery system for VOCs (volatile organic compounds) of throttling expansion refrigeration |
| CN109157944B (en) * | 2018-10-19 | 2021-02-12 | 南京工业大学 | Fractional cryogenic recovery system for VOCs (volatile organic compounds) of throttling expansion refrigeration |
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