CN207102240U - VOCs waste gas recovery processing units - Google Patents
VOCs waste gas recovery processing units Download PDFInfo
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- CN207102240U CN207102240U CN201721003356.6U CN201721003356U CN207102240U CN 207102240 U CN207102240 U CN 207102240U CN 201721003356 U CN201721003356 U CN 201721003356U CN 207102240 U CN207102240 U CN 207102240U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
It the utility model is related to a kind of VOCs waste gas recoveries processing unit, including adsorption/desorption unit, absorptive unit and rectification cell, the adsorption/desorption unit includes air-introduced machine, pretreating device, absorber, the source nitrogen being sequentially connected, and nitrogen heater is set between the absorber and source nitrogen；The absorptive unit includes the absorption tower being connected with absorber, and gas mixture cold condenser and gaseous mixture compressor are additionally provided between the absorption tower and absorber；The rectification cell includes the divided-wall distillation column being connected with absorption tower, and the gas outlet of the divided-wall distillation column tower top is connected with gas compressor, gas condenser, return tank and VOCs storage tanks are also connected with the downstream of gas condenser；Divided-wall distillation column bottom liquid outlet is connected with absorption tower.The VOCs waste gas recovery processing units that the utility model obtains, not only have higher absorption efficiency to VOCs, also reduce the loss of absorbent, and VOCs can obtain recycling.
Description
Technical field
It the utility model is related to environmental technology field, more particularly to a kind of VOCs waste gas recoveries processing unit.
Background technology
Industrial trade in process of production, can produce the largely waste gas containing VOCs, if these waste gas directly discharged
Into air, air pollution is not only resulted in, also results in waste of material, improves production cost.In recent years, VOCs control emissions
Work deploys in succession in various regions, and conventional VOCs Treatment process has combustion method, bioanalysis, absorption process, absorption method, luminous urged
Change method etc., wherein absorption method due to operating procedure it is simple, easily realize Automated condtrol, VOCs be recyclable, sorbing material can
Regeneration recycling the advantages that and by enterprise's extensive use.
But in VOCs removal process, original steam desorption and directly nitrogen desorption are (cleaned without using fixed gas
Journey) technology exists and permitted drawback：1. steam consumption when steam is desorbed is big, a large amount of waste water are formed after the completion of desorption, it is necessary to two
Secondary improvement, and steam condensate (SC) can take away a big chunk solvent, cause wastage of material；When 2. nitrogen is directly desorbed due to
VOCs saturated vapor pressure is larger, if wanting, required temperature is low if the VOCs overwhelming majority liquefaction in desorption gas is made by condensation,
Cause condensation energy consumption big, complex process, condition harshness；Due to condensing to the fixed gas after normal temperature still when 2. nitrogen is directly desorbed
Containing about 15%~18% VOCs, absorber desorption is caused not exclusively, regneration of adsorbent material is not thorough, the VOCs of recovery bis- times
Absorption cause energy dissipation and VOCs waste, neither energy-conservation again cause gas secondary pollution, cause this technology always not by
Enterprise approves, therefore adsorption recovery technology is badly in need of the development of technology and solved the above problems.
Utility model content
In order to solve the above problems, the utility model provides a kind of VOCs waste gas recoveries processing unit, can be raw to industry
Caused organic exhaust gas carries out safety dumping and realizes VOCs to recycle in production, while has carried out heat profit to greatest extent
With greatly reducing energy consumption, and non-secondary pollution, reached the purpose of green circulation economy.
The technical solution adopted in the utility model is：A kind of VOCs waste gas recoveries processing unit, it is characterised in that：Including inhaling
Attached desorption unit, the absorptive unit being connected with adsorption/desorption unit and the rectification cell being connected with absorptive unit.
The adsorption/desorption unit include be sequentially connected by the road air-introduced machine, organic exhaust gas can be cooled down and filtered
The pretreating device of processing, the absorber for adsorbing organic exhaust gas and the source nitrogen that desorbing agent is provided for desorption, in described
Nitrogen heater is provided between absorber and source nitrogen, the absorber is provided with air inlet, gas outlet and nitrogen inlet port；
The absorptive unit includes the absorption tower being connected with the gas outlet of absorber, between the absorption tower and absorber also
It is sequentially provided with gas mixture cold condenser and gaseous mixture compressor；Inlet, liquid outlet and gas outlet are provided with the absorption tower,
The cooler of cooling treatment can be carried out to absorbent by being provided with the absorption tower inlet；The absorption tower gas outlet and source nitrogen
It is connected；
The rectification cell includes the divided-wall distillation column being connected via pump with the liquid outlet on absorption tower, the partition wall essence
Evaporating tower, there is the gas outlet for being located at tower top and multiple liquid outlets located at bottom of towe, the divided-wall distillation column gas outlet to be sequentially connected
There are gas compressor, gas condenser, return tank and VOCs storage tanks are also associated with the downstream of gas condenser；Multiple described points
Next door rectifying column liquid outlet is connected via pump with the cooler at the inlet of absorption tower, and between the pump and cooler,
Liquid heat-exchanger is respectively provided between divided-wall distillation column and absorption tower liquid outlet.
As the further restriction to above-mentioned technical proposal, the pretreating device includes filter and fin tube type air cooling
Device.
As the further restriction to above-mentioned technical proposal, the absorber is to be arranged in parallel multiple, multiple suctions
Adnexa can alternately work, and the air inlet in the absorber, gas outlet and nitrogen inlet port are equipped with valve, described
VOCs detectors are provided with absorber gas outlet.
As the further restriction to above-mentioned technical proposal, between the absorber and gas mixture cold condenser, source nitrogen
Gaseous mixture heat exchanger is respectively provided between nitrogen heater.
As the further restriction to above-mentioned technical proposal, the gas mixture cold condenser is also connected with VOCs storage tanks, so that
Part VOCs enters VOCs storage tanks after being condensed into liquid.
As the further restriction to above-mentioned technical proposal, the absorption tower includes moving towards the first suction of series connection according to waste gas
Receive tower and second absorption tower.
Using above-mentioned technology, the utility model has the advantage of：
VOCs waste gas recoveries processing unit described in the utility model, VOCs is enriched in by absorption by adsorption/desorption unit
On material, so as to the gaseous mixture of the VOCs containing high concentration be obtained after desorption, so as to be advantageous in absorptive unit absorbent to VOCs's
Absorb；Two absorption towers connected in other absorptive unit can effectively be absorbed to VOCs, make to be emitted into the cleaning in air
Composition containing VOCs is lower in gas, makes absorption more thorough；Meanwhile absorbent can carry out essence after the completion of absorption through rectification cell
Evaporate and be separated into respective single product, so as to recycling, will not cause to waste, and pure liquid phase VOCs is also recycled, can quilt
Recycle.
The setting of gaseous mixture heat exchanger described in the utility model, using the high-temperature gas mixture from absorber out to needing
The nitrogen heat temperature raising heated, while to needing the gaseous mixture of cooling processing also to obtain cooling-down effect, thus high temperature mixes
The heat of gas has obtained abundant recycling, effectively reduces energy consumption, has saved production cost.
The setting of liquid heat-exchanger described in the utility model, using the heat of high temperature regeneration absorbent to absorption tower liquid outlet
The absorbent that the absorption of outflow has VOCs is heated up, while high temperature regeneration absorbent is cooled, thus has fully reclaimed heat
Amount, effectively reduces energy consumption, has saved production cost.
The setting of divided-wall distillation column described in the utility model, it may be implemented in while reclaimed to VOCs, can also be to a variety of
Absorbent carries out separation recycling；Meanwhile divided-wall distillation column also has good energy-saving effect.
Brief description of the drawings
Fig. 1 is a kind of process device structure schematic diagram of the utility model embodiment.
In figure：1- air-introduced machines；2- pretreating devices；3- absorbers；4- source nitrogens；5- nitrogen heaters；6- gaseous mixtures change
Hot device；7- gas mixture cold condensers；8-VOCs storage tanks；9- gaseous mixture compressors；The absorption towers of 10- first；11- second absorption towers；12-
Cooler；13- liquid heat-exchangers；14- divided-wall distillation columns；15- gas compressors；16- gas condensers；17- return tanks.
Embodiment
, it is necessary to explanation, the orientation of the instruction such as term " on ", " under ", " interior ", " outer " in description of the present utility model
Or position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of description the utility model and simplification is retouched
State, rather than instruction or imply signified device or element there must be specific orientation, with specific azimuth configuration and operation,
Therefore it is not intended that to limitation of the present utility model.
Below in conjunction with the accompanying drawings and specific embodiment the utility model is described in further detail.
Embodiment
As shown in figure 1, the VOCs waste gas recoveries processing unit includes adsorption/desorption unit, is connected with adsorption/desorption unit
Absorptive unit and the rectification cell being connected with absorptive unit.VOCs can be enriched on sorbing material by adsorption/desorption unit, desorption
When because desorption throughput it is small, in so obtained gaseous mixture will the VOCs containing higher concentration, so as to be advantageous to absorptive unit
Absorption of the middle absorbent to VOCs.Adsorption/desorption unit include be sequentially connected by the road air-introduced machine 1, organic exhaust gas can be carried out
Cool down with the pretreating device 2 of filtration treatment, the absorber 3 for adsorbing organic exhaust gas and provide desorbing agent for desorption
Source nitrogen 4, wherein pretreating device 2 include filter and fin tube type air cooler, and filter wraps to remove in VOCs waste gas
Solid, the liquid particles contained, and fin tube type air cooler can then carry out cooling processing to VOCs waste gas, to improve absorber 3
To VOCs absorption efficiency.VOCs waste gas is passed through in absorber 3 after fin tube type air cooler cools to 30~40 DEG C, is inhaled
Sorbing material in adnexa 3 is upper and lower two layers, and wherein sorbing material is activated carbon or molecular sieve, and the thickness of every layer of sorbing material is
600~800mm.Absorber 3 is provided with air inlet, gas outlet and nitrogen inlet port, and air inlet is located at two layers of the absorption of absorber 3
The centre position of material, so that VOCs waste gas enters the centre of two layers of sorbing material in absorber 3, so as to pass through two layers of absorption up and down
Discharged after material adsorption cleaning by the gas outlet of absorber 3, the clean gas of discharge is through smoke stack emission into air.
Absorber 3 is multiple to be arranged in parallel, and multiple absorbers 3 can alternately work, and entering in each absorber 3
Valve is equipped with gas port, gas outlet and nitrogen inlet port, while VOCs detectors are provided with the gas outlet of absorber 3.When
When VOCs contents reach limit value in the clean gas of VOCs detector monitors at the gas outlet of absorber 3, then by pipeline
Valve transfer, VOCs waste gas is passed through to another absorber 3 with adsorption capacity being in parallel to the absorber 3 with adsorption saturation
In, while desorption manipulation is carried out to the absorber 3 of adsorption saturation.Nitrogen heater 5 is provided between absorber 3 and source nitrogen 4,
Nitrogen in source nitrogen 4 enters in the absorber 3 of adsorption saturation after being heated in nitrogen heater 5 from nitrogen inlet port to be followed
Ring is desorbed.
Absorptive unit includes the absorption tower being connected by pipeline with the gas outlet of absorber 3, and the absorption tower is included with gas
The first absorption tower 10 and the second absorption tower 11 of series connection are moved towards, is also sequentially provided between the first absorption tower 10 and absorber 3 mixed
Gas condenser 7 and gaseous mixture compressor 9 are closed, while gas mixture cold condenser 7 is also connected with VOCs storage tanks 8, so that part gaseous mixture
The middle blended gas condensers 7 of part VOCs turn into liquid after condensing and entered in VOCs storage tanks 8.The connection of gaseous mixture compressor 9 first
The air inlet on absorption tower 10, inlet, liquid outlet and gas outlet are provided with the first absorption tower 10 and second absorption tower 11,
The air inlet of the gas outlet connection second absorption tower 11 on one absorption tower 10, and the gas outlet of second absorption tower 11 and the phase of source nitrogen 4
Connect, so that the nitrogen in the gaseous mixture after desorption participates in desorption process again after being back to source nitrogen 4 again, circulated nitrogen
Utilize.First absorption tower 10 uses paraffin oil as absorbent, what paraffin oil was set at the top inlet of the first absorption tower 10
Cooler 12 enters after carrying out cooling treatment, and the tower top in the first absorption tower 10 is added in the form of spraying, and on the first absorption tower
Flow in 10, contacted with the gaseous mixture flowed from bottom to top from top to bottom, so as to absorb the VOCs in gaseous mixture, and inhaled from first
Receive paraffin oil of the liquid outlet discharge containing VOCs of tower 10；Remaining gaseous mixture enters second by the gas outlet on the first absorption tower 10 and inhaled
Receive in tower 11, second absorption tower 11 is using heavy diesel as absorbent, and heavy diesel is in the top inlet of second absorption tower 11
The cooler 12 that place is set enters after carrying out cooling treatment, is added in the tower top of second absorption tower 11 in the form of spraying, and the
Flow in two absorption towers 11, contacted with the gaseous mixture flowed from bottom to top from top to bottom, so as to absorb the VOCs in gaseous mixture, and
The heavy diesel containing VOCs is discharged from the liquid outlet of second absorption tower 11.
Further, the rectification cell includes point being connected with the first absorption tower 10, second absorption tower 11 via pump
Next door rectifying column 14, so as to go out liquid from the paraffin oil containing VOCs of the liquid outlet of the first absorption tower 10 discharge and from second absorption tower 11
Enter after the mixing of the heavy diesel containing VOCs of mouth discharge and rectifying recovery is carried out in divided-wall distillation column 14.Using partition wall rectifying
Tower, while can be achieved to reclaim VOCs, can also separation recycling be carried out to a variety of absorbents, remove the essence using multiple series connection from
Evaporate tower to separate absorbent, therefore there is good energy-saving effect.The divided-wall distillation column 14 has located at tower top
Gas outlet and multiple liquid outlets located at bottom of towe, VOCs can be overflowed with gas phase from the gas outlet of tower top, and warp and partition wall
The gas compressor 16 of the gas outlet of rectifying column 14 connection enters gas condenser 17 after compressing, using gas compressor 15 to gas phase
VOCs be compressed with and be condensed into liquid beneficial to it.VOCs is condensed into organic solution in gas condenser 16, and organic solution enters
In the return tank 17 being connected with gas condenser 16, part organic solution is back to the tower of divided-wall distillation column 14 in return tank 17
Top, and remaining organic solution is then transported in the VOCs storage tanks 8 being connected with return tank 17 through pump.Meanwhile gas phase condenser 16
Gaseous mixture compressor 9 is also connected with, so that the gaseous mixture after the gas and desorption that are not coagulated through gas phase condenser 16 enters again after converging
Row absorption is handled.Paraffin oil and heavy diesel after regeneration flow out from the different liquid outlets of divided-wall distillation column 14 respectively, outflow
The liquid outlet of paraffin oil is connected through pump with the cooler 12 at the inlet of the first absorption tower 10, flows out the liquid outlet warp of heavy diesel
Pump is connected with the cooler 12 at the inlet of second absorption tower 11 so that regeneration after paraffin oil and heavy diesel after separation again
Again participate in into absorption operation.
In addition, respectively it is provided between absorber 3 and gas mixture cold condenser 7, between source nitrogen 4 and nitrogen heater 5
Gaseous mixture heat exchanger 6, the nitrogen that the gaseous mixture heat exchanger 6 can be used for heating needs go out using from absorber 3 in advance
The high-temperature gas mixture come carries out heat temperature raising, and at the same time gaseous mixture is cooled, thus the heat of high-temperature gas mixture can obtain
Fully recycle, so as to effectively reduce energy consumption, saved production cost.In cooler 12 and divided-wall distillation column 14
Liquid heat-exchanger is respectively provided between pump at liquid outlet, between the liquid outlet of 14 and first absorption tower of divided-wall distillation column 10
13, liquid heat-exchanger 13 sets the suction that can have VOCs to the absorption on the first absorption tower 10 and the outflow of the liquid outlet of second absorption tower 11
Receive agent and carry out heating treatment using the heat of high temperature regeneration absorbent, while high temperature regeneration absorbent is cooled, thus fully
Heat has been reclaimed, has effectively reduced energy consumption.
VOCs waste gas recovery processing units described in the present embodiment, VOCs can be collected in by sorbing material by absorber 3
On, in so obtained gaseous mixture will the VOCs containing higher concentration, so as to be advantageous in absorptive unit absorbent to VOCs
Absorption；The first absorption tower 10 connected in other absorptive unit can effectively be absorbed with second absorption tower 11 to VOCs, be made
Be emitted into the clean gas in air that composition containing VOCs is lower, allow absorb it is more thorough；Meanwhile absorbent is after the completion of absorption,
Respective single product can be separated into through divided-wall distillation column 14, so as to recycling, will not cause to waste, and VOCs is also returned
Receive, can be reused.
The preferred embodiment of the utility model is the foregoing is only, but the scope of protection of the utility model is not limited to
This, any those skilled in the art are in the technical scope that the utility model discloses, according to technology of the present utility model
Design is subject to equivalent substitution or changes the technical scheme of gained, should all be covered by the scope of protection of the utility model.
Claims (6)
- A kind of 1. VOCs waste gas recoveries processing unit, it is characterised in that：It is connected including adsorption/desorption unit, with adsorption/desorption unit Absorptive unit and the rectification cell that is connected with absorptive unit,Air-introduced machine that the adsorption/desorption unit includes being sequentially connected by the road, organic exhaust gas can be cooled down and filtration treatment Pretreating device, the absorber for adsorbing organic exhaust gas and provide the source nitrogen of desorbing agent for desorption, in the absorption Nitrogen heater is provided between device and source nitrogen, the absorber is provided with air inlet, gas outlet and nitrogen inlet port；The absorptive unit includes the absorption tower being connected with the gas outlet of absorber, between the absorption tower and absorber also successively Provided with gas mixture cold condenser and gaseous mixture compressor；Inlet, liquid outlet and gas outlet are provided with the absorption tower, it is described The cooler of cooling treatment can be carried out to absorbent by being provided with the inlet of absorption tower；The absorption tower gas outlet is connected with source nitrogen Connect；The rectification cell includes the divided-wall distillation column being connected via pump with the liquid outlet on absorption tower, the divided-wall distillation column With multiple liquid outlets located at the gas outlet of tower top and located at bottom of towe, the divided-wall distillation column gas outlet is connected with gas in turn Gas compressor, gas condenser, return tank and VOCs storage tanks are also associated with the downstream of gas condenser；Multiple partition walls Rectifying column liquid outlet is connected via pump with the cooler at the inlet of absorption tower, and between the pump and cooler, separation Liquid heat-exchanger is respectively provided between wall rectifying column and absorption tower liquid outlet.
- 2. VOCs waste gas recoveries processing unit according to claim 1, it is characterised in that：It is characterized in that：Locate before described Reason device includes filter and fin tube type air cooler.
- 3. VOCs waste gas recoveries processing unit according to claim 1, it is characterised in that：The absorber is to be arranged in parallel It is multiple, multiple absorbers can alternately work, and the air inlet in the absorber, gas outlet and nitrogen enter Mouth is equipped with valve, and VOCs detectors are provided with the absorber gas outlet.
- 4. VOCs waste gas recoveries processing unit according to claim 1, it is characterised in that：In the absorber and gaseous mixture Between condenser, gaseous mixture heat exchanger is respectively provided between source nitrogen and nitrogen heater.
- 5. VOCs waste gas recoveries processing unit according to claim 1, it is characterised in that：The gas mixture cold condenser also with VOCs storage tanks connect, so that part VOCs enters VOCs storage tanks after being condensed into liquid.
- 6. VOCs waste gas recoveries processing unit according to claim 1, it is characterised in that：The absorption tower is included with gas Move towards the first absorption tower and the second absorption tower of series connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721003356.6U CN207102240U (en) | 2017-08-11 | 2017-08-11 | VOCs waste gas recovery processing units |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721003356.6U CN207102240U (en) | 2017-08-11 | 2017-08-11 | VOCs waste gas recovery processing units |
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| CN207102240U true CN207102240U (en) | 2018-03-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107261754A (en) * | 2017-08-11 | 2017-10-20 | 河北先河正源环境治理技术有限公司 | VOCs waste gas recovery processing method and processing devices |
| CN110935281A (en) * | 2019-04-11 | 2020-03-31 | 北京诺维新材科技有限公司 | Adsorption and regeneration device and method for solid adsorbent for adsorbing volatile organic compounds |
| CN111854328A (en) * | 2020-07-06 | 2020-10-30 | 山东康源环保科技有限公司 | Treatment device for recycling organic waste gas by cryogenic process |
-
2017
- 2017-08-11 CN CN201721003356.6U patent/CN207102240U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107261754A (en) * | 2017-08-11 | 2017-10-20 | 河北先河正源环境治理技术有限公司 | VOCs waste gas recovery processing method and processing devices |
| CN107261754B (en) * | 2017-08-11 | 2023-11-28 | 河北先河正源环境治理技术有限公司 | VOCs waste gas recovery treatment method and device |
| CN110935281A (en) * | 2019-04-11 | 2020-03-31 | 北京诺维新材科技有限公司 | Adsorption and regeneration device and method for solid adsorbent for adsorbing volatile organic compounds |
| CN110935281B (en) * | 2019-04-11 | 2022-04-15 | 北京诺维新材科技有限公司 | Adsorption and regeneration device and method for solid adsorbent for adsorbing volatile organic compounds |
| CN111854328A (en) * | 2020-07-06 | 2020-10-30 | 山东康源环保科技有限公司 | Treatment device for recycling organic waste gas by cryogenic process |
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