CN108837665A - A kind of efficient Integrated Processing Unit of organic exhaust gas - Google Patents
A kind of efficient Integrated Processing Unit of organic exhaust gas Download PDFInfo
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- CN108837665A CN108837665A CN201810939168.7A CN201810939168A CN108837665A CN 108837665 A CN108837665 A CN 108837665A CN 201810939168 A CN201810939168 A CN 201810939168A CN 108837665 A CN108837665 A CN 108837665A
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- knockout drum
- condenser
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- 238000012545 processing Methods 0.000 title claims abstract description 24
- 238000001179 sorption measurement Methods 0.000 claims abstract description 170
- 239000012855 volatile organic compound Substances 0.000 claims abstract description 90
- 238000010521 absorption reaction Methods 0.000 claims abstract description 43
- 238000011282 treatment Methods 0.000 claims abstract description 18
- 239000000779 smoke Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 47
- 238000003795 desorption Methods 0.000 claims description 37
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 36
- 238000000926 separation method Methods 0.000 claims description 30
- 239000003463 adsorbent Substances 0.000 claims description 28
- 239000012530 fluid Substances 0.000 claims description 26
- 229910021529 ammonia Inorganic materials 0.000 claims description 18
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 11
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000002808 molecular sieve Substances 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000000741 silica gel Substances 0.000 claims description 8
- 229910002027 silica gel Inorganic materials 0.000 claims description 8
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 56
- 238000009833 condensation Methods 0.000 abstract description 20
- 230000005494 condensation Effects 0.000 abstract description 20
- 230000008569 process Effects 0.000 description 27
- 230000000694 effects Effects 0.000 description 11
- 238000001816 cooling Methods 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 229940058401 polytetrafluoroethylene Drugs 0.000 description 7
- 230000006837 decompression Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000008246 gaseous mixture Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention is a kind of efficient Integrated Processing Unit of organic exhaust gas, including passing through the sequentially connected surge tank of flue, air blower, condenser, knockout drum and adsorption tower unit, gas river conjunction is provided between the knockout drum and the adsorption tower unit, the uncontrollable discharge VOCs exhaust gas collected from workshop enters surge tank from uncontrollable discharge smoke inlet, point source emission VOCs exhaust gas enters gas river conjunction by point source discharge gas entrance, treated uncontrollable discharge VOCs exhaust gas enters adsorption tower unit with untreated source emission VOCs exhaust gas after gas river conjunction mixes and carries out adsorption treatment.The present apparatus combines the advantages of condensation method and absorption method, and high concentration VOCs exhaust gas is separated using condensation method, and low concentration VOCs exhaust gas is checked on using absorption method, so that the VOCs exhaust gas of organized discharge and uncontrollable discharge obtains effective comprehensive treatment.
Description
Technical field
The present invention relates to environmental technology fields, relate to the use of the method for physical technique means processing VOCs gas, specifically relate to
And a kind of efficient Integrated Processing Unit of organic exhaust gas.
Background technique
Organic exhaust gas, also referred to as VOCs mainly include hydro carbons, aromatic hydrocarbons, alcohols, aldehydes, ketone, lipid, amine and organic
Acid etc., it is generally recognized that fusing point is lower than room temperature, and volatile organic compounds of the boiling spread between 50~260 DEG C has strong
The features such as volatilization, special odor, irritation and toxicity, not only can baneful influence ecological environment, human health can also be caused sternly
It endangers again.VOCs Treatment process can be divided into two classes：First is that recovery technology, by temperature, the pressure etc. that change certain technical process
Physical condition makes VOCs enrichment and separation, is preferentially recycled, and takes further innoxious place for no utility value
Reason, mainly there is condensation method, absorption method, absorption process and membrane separation process etc.；Second is that the technology of destruction is used by chemistry or biochemical reaction
VOCs is transformed into CO by heat, light, catalyst and microorganism2And H2The small molecule compound of the nonhazardous such as O or low toxicity evil, makes
VOCs is handled, and mainly has combustion method, lower temperature plasma technology, Photocatalyst and biotechnology etc..
In the workshop of the industries such as petroleum, chemical industry, coating, pharmacy, printing, the discharge of VOCs exhaust gas is divided into a source emission
With uncontrollable discharge two types：Point source emission refers to the discharge of process units in technical process, and exhaust gas pressure is higher, concentration and
Flow is relatively stable；Uncontrollable discharge then not necessarily has direct relation with a certain specific production process or device, in fact it could happen that
At each position in workshop, such as valve, flange, storage tank, cooling tower or circulating water cooling system, exhaust gas pressure is lower, concentration
With changes in flow rate is frequent, fluctuation range is larger, it is extremely unstable.
CN105688596B discloses a kind of multicomponent VOCs adsorption condensing recyclable device, including adsorption system, VOCs take off
Attached condensation collection system and refrigeration system, including for exhaust gas to be pre-chilled, dehumidification treatments fix with multiple adsorbents
The adsorption system of bed；What is connect with adsorption system is used for while adsorption system is adsorbed to the suction containing saturation adsorbent
Attached fixed bed carries out the VOCs desorption condensation collection system of desorption recycling, and VOCs desorption condensation collection system is provided with for it simultaneously
The refrigeration system of condensing recovery connects.Technical solution VOCs treatment effeciency is high, low energy consumption, but can only process points source emission
VOCs.CN206139013U discloses a kind of processing equipment of chemical storage tank VOCs uncontrollable discharge, including breather valve, adsorption tanks
And heat exchanger, the storage tank communication port of breather valve are connected with chemical storage tank, the exhaust outlet of breather valve and the air inlet of adsorption tanks
It communicates, the exhaust outlet of adsorption tanks and the air inlet of heat exchanger connect, and breather valve can regulate and control to be input to the flow in adsorption tanks
Size, the exhaust outlet of adsorption tanks and the air inlet of heat exchanger connect.The technical solution is utilized high performance catalyst and independently divides
The characteristic for solving VOCs, solves secondary pollution problems, however device treatment effeciency is not high, it is also difficult to be effectively treated on a large scale a little
The VOCs of source emission.
Therefore, because the VOCs exhaust gas of point source emission and uncontrollable discharge is deposited in terms of the characteristics such as concentration, flow, temperature and humidity
In larger difference, it is difficult to realize qualified discharge and high efficiente callback by single Treatment process, need to design a kind of reasonable
Treatment process combined route, to realize the efficient integrated treatment of workshop VOCs exhaust gas.
Summary of the invention
The object of the present invention is in view of the drawbacks of the prior art, develop a kind of efficient Integrated Processing Unit of organic exhaust gas, adopt
With " condensation+absorption " comprehensive treatment technique route, the equal of the VOCs exhaust gas of workshop point source emission and uncontrollable discharge is realized
It can efficient integrated treatment.It is described that technical scheme is as follows.
A kind of efficient Integrated Processing Unit of organic exhaust gas, including by the sequentially connected surge tank of flue, air blower,
Condenser, knockout drum and adsorption tower unit are provided with gas friendship between the knockout drum and the adsorption tower unit
Remittance mouth enters surge tank from the uncontrollable discharge VOCs exhaust gas that workshop is collected from uncontrollable discharge smoke inlet, puts source emission
VOCs exhaust gas enters gas river conjunction by point source discharge gas entrance, and the gas river conjunction passes through absorption pipeline and adsorption tower
Unit connects, and is provided with absorption valve on the absorption pipeline, air outlet valve is provided on the outlet pipe at the top of the adsorption tower, passes through
The uncontrollable discharge VOCs exhaust gas for crossing processing enters after gas river conjunction mixes with untreated source emission VOCs exhaust gas
Adsorption tower unit carries out adsorption treatment, is discharged by opening air outlet valve by exhanst gas outlet after being disposed；
The vacuum pump is connected with the adsorption tower unit by the way that pipeline is desorbed, and the desorption pipeline is provided with desorption valve,
The vacuum pump is connect with surge tank, and the desorption gas of the adsorption tower unit is then passed through described slow by the vacuum pump from bottom to top
It rushes in tank, the uncontrollable discharge VOCs exhaust gas collected from workshop is mixed with desorption gas mixed flow, and the surge tank is provided with pressure biography
Sensor；The condenser and the knockout drum are connect with the fluid reservoir, and the fluid reservoir is provided with waste liquid outlet.
, concentration lower to pressure and the frequent uncontrollable discharge VOCs exhaust gas of changes in flow rate are adsorbed afterwards using first condensing
Method processing.The desorption gas of the VOCs containing high concentration caused by uncontrollable discharge VOCs exhaust gas and desorption process is in surge tank mixed flow
Mixing.Pressure sensor in the surge tank shows that pressure reaches certain value, starts the air blower, gaseous mixture is boosted to
After operating pressure, then it is delivered in the condenser from tank deck, most VOCs in exhaust gas are by the condenser
Condensing agent is cooling and condenses.Exhaust gas through condensing is passed through in the knockout drum, and organic liquid is left on the gas-liquid separation
In tank, tail gas is then passed through gas river conjunction, and adsorption tower unit is entered after mixing with source emission VOCs exhaust gas and carries out adsorption treatment,
The organic liquid of condenser and gas-liquid separation pot bottom re-uses or fixed by the waste liquid outlet from the fluid reservoir is flow to
Phase outlet.
To sum up, the present apparatus combines the advantages of condensation method and absorption method, and high concentration VOCs exhaust gas is separated using condensation method, low
Concentration VOCs exhaust gas is checked on using absorption method, and workshop VOCs exhaust gas is made to obtain effective comprehensive treatment, and foring can efficient stable
The comprehensive processing technique process of operation can reach the newest discharge standard of country, and nothing under lower investment and operating cost
Secondary pollution.
Preferably, the adsorption tower unit includes adsorption tower, successively set inside the adsorption tower along the exhaust gas direction of motion
Set air inlet pipe, eddy flow diffuser, even spiracular plate, deflector, silk screen orifice plate and escape pipe, the even spiracular plate and the silk screen hole
Adsorption tower inner space between plate is filled with adsorbent.
Adsorption tower diameter refers to internal diameter, code name D in the application.
The air inlet pipe is set to the bottom of adsorption tower, and the eddy flow diffuser is set on the air inlet pipe, described
The bottom of eddy flow diffuser is identical and in communication as the caliber of the air inlet pipe, is provided with several rotations on the eddy flow diffuser
Flowing plate；The even spiracular plate is located above the eddy flow diffuser, the even spiracular plate it is vertical with the eddy flow diffuser away from
From 1/6 adsorption tower diameter D is greater than, the top diameter for the spiral board being arranged on the eddy flow diffuser is no more than adsorption tower diameter D,
The diameter of the even spiracular plate is identical as adsorption tower diameter D, and the even stomata packing free ratio is 50~80%.
The exhaust gas for entering adsorption tower in parallel by air inlet pipe, the air-flow of rotational flow is converted into through eddy flow diffuser, uniformly
Even spiracular plate is diffused to, then adsorption zone in tower is further dispersed by even spiracular plate.Eddy flow diffuser can be effectively improved
Distribution situation of the exhaust gas on orifice plate avoids forming absorption dead zone in tower body, improves the utilization rate and service life of adsorbent.
The deflector is set in qually spaced in tower wall two sides, tilts down 10~30 °, and the lateral length of the deflector is
L, 1/2D<L<2/3D.Deflector designs advantages of simple, by changing gas circuit of the exhaust gas in tower, can have under lower drag
Effect extends residence time of the exhaust gas in tower, improves the adsorption deeply of adsorbent, is attained by superior suction to big flow exhaust gas
Attached effect.
Preferably, the adsorbent selects silica gel, activated alumina, active carbon, any one or its in molecular sieve
Combination particularly selects silica gel/molecular sieve compound adsorbent, i.e., by silica gel and molecular sieve according to the type of VOCs in exhaust gas and
Characteristic is mixed in a certain ratio into compound adsorbent.Adsorbent loads upwards from even spiracular plate, by the space between deflector
It fills up step by step, is finally loaded into certain altitude.The silk screen orifice plate, which is bolted, to press on adsorbent.It can be avoided gas
It flows through big and causes adsorbent boiling fluidisation, generates catalyst fines, to effectively extend adsorbent service life, guarantee absorption
Tower operates normally.
Preferably, the knockout drum includes can body, the separation canister incoming gas that is set on the can body side wall
It manages, the knockout drum leakage fluid dram for being set to the can body bottom, the knockout drum gas outlet being set at the top of the can body and set
It is placed in the knockout drum escape pipe of can body inside center, the knockout drum air inlet pipe is connect with the condenser, the knockout drum
Leakage fluid dram is connect with the fluid reservoir, and the knockout drum escape pipe is connect with the gas river conjunction, the knockout drum escape pipe
Inside center is provided with eddy flow bar, is equidistantly provided on the outer surface of the knockout drum escape pipe and the eddy flow bar several
Eddy flow guide plate, the lower part of the can body are provided with gas-liquid separation orifice plate, as shown in figure 3, in the middle part of the gas-liquid separation orifice plate
It is set as the fairing cap to raise upward, the periphery of the fairing cap is provided with circular arc plate, the circular arc plate equidistantly distributed
There are several knockout drum drainage holes, the knockout drum leakage fluid dram is connected with liquid seal device, and tank body bottom end can be kept to retain for a long time to be had on a small quantity
Machine liquid is to form fluid-tight, in order to avoid gas leakage.
Organic exhaust gas is tangentially passed through in tank from knockout drum air inlet pipe, and the top for flowing to can body is arranged by knockout drum escape pipe
Out, the time of gas-liquid separation is extended in this way, and gas is during flow direction, on knockout drum escape pipe and eddy flow rod outer surface
Eddy flow guide plate under the action of high-speed rotational, lose kinetic energy after organic liquid through condensing and tank skin, tube wall collision, be attached on
Thereon, to realize the separation with steering gas.Organic liquid on tank skin flow to gas-liquid separation orifice plate certainly under the effect of gravity,
It flow to fluid reservoir, re-using or regular outlet certainly through knockout drum leakage fluid dram after.Gas-liquid separation orifice plate 3 can promote cyclone gas
Body is folded into knockout drum escape pipe, carries out depth separation；Gas excessive convergence is avoided simultaneously, again with the organic liquid of tank bottom
Mixing, to guarantee more preferably gas-liquid separation effect.
Preferably, the fairing cap is circular arc body, top is provided with anticorrosion rubber.Rubber one can be prevented from organic
The corrosion of liquid increases residence time of the gas inside tank second is that can slow down to gas, promotes point of gas liquid
From.The anticorrosion rubber be polytetrafluoroethylene (PTFE), the polytetrafluoroethylene (PTFE) with a thickness of 0.1-1mm.
Preferably, the bottom or top of the knockout drum escape pipe are provided with silk screen filter layer；The silk screen filter layer
With a thickness of 10~100mm.Gas through cyclonic separation is further separated in outlet bottom of the tube by silk screen layer, the silk screen filter
Layer is for preventing the organic liquid not being kept completely separate to be discharged with gas.The silk screen filter layer with a thickness of 10~100mm.It is preferred that
, when organic exhaust gas concentration is higher, silk screen filter layer is installed at the top of escape pipe, in order to replace.Preferably, the silk
Net filtration layer at top with a thickness of 30~100mm.When organic exhaust gas concentration is higher, thickness can be increased, promote separating effect.
Preferably, the condenser is provided with liquefied ammonia entrance and ammonia outlet, the condenser is horizontal condenser, institute
It states and is provided with condenser pipe in horizontal condenser, liquefied ammonia is accessed in the liquefied ammonia entrance and is circulated in the condenser pipe.In exhaust gas
Most VOCs condensing agent in pipe that is condensed is cooling and condense.Condensation process can directly adopt factory and have liquefied ammonia, condensation
After, the ammonia being vaporized is delivered in factory and is used.
Preferably, the adsorption tower unit includes the first adsorption tower, the second adsorption tower, third adsorption tower, the 4th absorption
Tower, first adsorption tower, the second adsorption tower, third adsorption tower, the 4th adsorption tower bottom be provided with absorption valve and desorption
Valve, first adsorption tower, third adsorption tower, are provided with air outlet valve at the top of the 4th adsorption tower at the second adsorption tower, and described
Between one adsorption tower and the second adsorption tower, balanced valve, the absorption valve are provided between third adsorption tower and the 4th adsorption tower
On pipeline between the knockout drum and the adsorption tower unit, the exhaust gas by the adsorption tower cell processing is logical
Air outlet valve control is crossed to be discharged by exhanst gas outlet.When using the present apparatus, the pressure discharged to process units in workshop is higher, concentration
Point source emission VOCs exhaust gas low, flow is big, gas source is stable directlys adopt absorption method processing.Adsorption tower unit is provided with 4 and stands
Formula adsorption tower, it is double de- using double suction, when the first adsorption tower, third adsorption tower are adsorbed, the second adsorption tower, the 4th adsorption tower
The adsorption tower for having adsorbed a certain amount of VOCs is desorbed, and is so worked alternatively.When source emission VOCs exhaust gas reaches certain pressure
When, air intake control system automatically turns on absorption valve, and exhaust gas, which enters from bottom to top in two of them adsorption tower, to be adsorbed, in exhaust gas
VOCs be adsorbed processing, purify it is up to standard after drained into atmosphere through exhanst gas outlet.Adsorption tower has adsorbed a certain amount of VOCs, need to be into
Row desorption and regeneration.The desorption valve for two adsorption towers that need to be desorbed is first turned on, it is automatic to be depressured, certain value is dropped to system pressure
When, start the vacuum pump automatically, vacuum desorption is carried out to adsorption tower, VOCs is thoroughly deviate from.Contain caused by desorption process
The desorption gas of high concentration VOCs is extracted out through the vacuum pump from below adsorption tower, and is delivered in surge tank, with uncontrollable discharge
After the mixing of VOCs exhaust gas, VOCs is recycled through condensation method together.Therefore, it can realize that absorption with pressure, decompression are de- by vacuum pump
Attached process flow.
Beneficial effects of the present invention have：
(1) system combines the advantages of condensation method and absorption method, and high concentration VOCs exhaust gas is separated using condensation method, low concentration
VOCs exhaust gas is checked on using absorption method, so that the VOCs exhaust gas of organized discharge and uncontrollable discharge obtains effective Synthetic
Reason, form can efficient stable operation comprehensive processing technique process, can it is lower investment and operating cost under, reach country
Newest discharge standard, and it is without secondary pollution.
(2) the reasonable structure design of adsorption tower can effectively extend residence time of the exhaust gas in tower under lower drag, match
Silica gel/molecular sieve the compound adsorbent selected is closed, with large specific surface area, adsorption efficiency is high, selectivity is good, high-intensitive, wear-resisting
And regenerability it is good the advantages that, it can be achieved that splendid adsorption effect.
(3) adsorption tower unit cooperates advanced, reliable automation control using absorption with pressure, decompression separating process process
Program can either effectively deviate from the VOCs being adsorbed when carrying out desorption and regeneration to adsorbent, and can guarantee that adsorbent is stablized
In best effort environment；Can high efficiente callback have the VOCs of utility value, not only can avoid polluting the environment, but also can be effective
The loss of raw materials for production and product is reduced, production cost is reduced.
(4) condensing unit is provided with surge tank, can be effective against the variation such as exhaust gas concentration, flow, pressure, temperature to dress
The impact set adapts to the VOCs concentration of uncontrollable discharge exhaust gas in tens~hundreds of thousands mg/m3Between fluctuation, changes in flow rate it is frequent
The characteristics of, adaptability for working condition is strong, and the continual and steady operation of device is effectively ensured.
(5) knockout drum uses new structural design, can effectively realize the separation of organic liquid and gas, prevent organic
Liquid causes to impact to adsorption tower.
Detailed description of the invention
2 flowage structure schematic diagram of Fig. 1 embodiment；
1 flow diagram of Fig. 2 embodiment；
Fig. 3 adsorption tower unit partial enlarged view；
Fig. 4 knockout drum partial enlarged view；
The fairing cap partial enlarged view of Fig. 5 knockout drum；
The partial enlarged view of another embodiment of Fig. 6 knockout drum.
Appended drawing reference：Uncontrollable discharge smoke inlet 1, ammonia outlet 3, point source discharge gas entrance 4, delays liquefied ammonia entrance 2
Rush tank 5, air blower 6, condenser 7, knockout drum 8, knockout drum air inlet pipe 801, knockout drum leakage fluid dram 802, gas-liquid separation hole
Plate 803, eddy flow guide plate 804, eddy flow bar 805, knockout drum escape pipe 806, silk screen filter layer 807, knockout drum gas outlet 808,
Fairing cap 809, circular arc plate 810, knockout drum drainage hole 811, vacuum pump 9, adsorption tower unit 10, the first adsorption tower 11, second
Adsorption tower 12, third adsorption tower 13, the 4th adsorption tower 14, exhanst gas outlet 15, waste liquid outlet 16, gas river conjunction 17, absorption valve
18, valve 19, air outlet valve 20, balanced valve 21, air inlet pipe 22, eddy flow distributor 23, even spiracular plate 24, deflector 25, absorption is desorbed
Agent 26, fluid reservoir 27, silk screen orifice plate 28, escape pipe 29.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing：
Embodiment 1
A kind of efficient Integrated Processing Unit of organic exhaust gas, as shown in Fig. 2, including passing through the sequentially connected buffering of flue
Tank 5, air blower 6, condenser 7, knockout drum 8 and adsorption tower unit 10, the knockout drum 8 and the adsorption tower unit
Gas river conjunction 17 is provided between 10, the uncontrollable discharge VOCs exhaust gas collected from workshop is from uncontrollable discharge smoke inlet 1
Into surge tank 5, source emission VOCs exhaust gas is put by point source discharge gas entrance 4 and enters gas river conjunction 17, the gas is handed over
The mouth 17 that converges is connect by adsorbing pipeline with adsorption tower unit 10, and absorption valve 18, the adsorption tower are provided on the absorption pipeline
Air outlet valve 20 is provided on the outlet pipe at top, treated uncontrollable discharge VOCs exhaust gas and untreated point source are arranged
It puts VOCs exhaust gas and enters the progress adsorption treatment of adsorption tower unit 10 after the mixing of gas river conjunction 17, pass through unlatching after being disposed
Air outlet valve 20 is discharged by exhanst gas outlet 15；
The vacuum pump 9 is connected with the adsorption tower unit 10 by the way that pipeline is desorbed, and the desorption pipeline is provided with desorption
Valve 19, the vacuum pump 9 are connect with surge tank 5, the vacuum pump 9 by the desorption gas of the adsorption tower unit 10 then from bottom to top
It is passed through in the surge tank 5, the uncontrollable discharge VOCs exhaust gas collected from workshop is mixed with desorption gas mixed flow, the surge tank 5
It is provided with pressure sensor (not shown)；The condenser 7 and the knockout drum 8 are connect with the fluid reservoir 27, institute
It states fluid reservoir 27 and is provided with waste liquid outlet 16.
, concentration lower to pressure and the frequent uncontrollable discharge VOCs exhaust gas of changes in flow rate are adsorbed afterwards using first condensing
Method processing.The desorption gas of the VOCs containing high concentration caused by uncontrollable discharge VOCs exhaust gas and desorption process is mixed in surge tank 5
Stream mixing.Pressure sensor in the surge tank 5 shows that pressure reaches certain value, starts the air blower 6, will mix gas lift
After being depressed into operating pressure, then it is delivered in the condenser 7 from tank deck, most VOCs in exhaust gas are by the condensation
The condensing agent of device 7 is cooling and condenses.Exhaust gas through condensing is passed through in the knockout drum 8, and organic liquid is left on the gas
In liquid knockout drum 8, tail gas is then passed through gas river conjunction 17, and adsorption tower unit is entered after mixing with source emission VOCs exhaust gas and is carried out
The organic liquid of adsorption treatment, condenser and gas-liquid separation pot bottom re-uses or passes through institute from the fluid reservoir 27 is flow to
State the regular outlet of waste liquid outlet 16.
To sum up, the present apparatus combines the advantages of condensation method and absorption method, and high concentration VOCs exhaust gas is separated using condensation method, low
Concentration VOCs exhaust gas is checked on using absorption method, and workshop VOCs exhaust gas is made to obtain effective comprehensive treatment, and foring can efficient stable
The comprehensive processing technique process of operation can reach the newest discharge standard of country, and nothing under lower investment and operating cost
Secondary pollution.
As shown in figure 3, the adsorption tower unit 10 includes adsorption tower, inside the adsorption tower successively along the exhaust gas direction of motion
Air inlet pipe 22, eddy flow diffuser 23, even spiracular plate 24, deflector 25, silk screen orifice plate 28 and the escape pipe 29 of setting, the even gas
Adsorption tower inner space between orifice plate 24 and the silk screen orifice plate 28 is filled with adsorbent 26；
The air inlet pipe 22 is set to the bottom of adsorption tower, the eddy flow diffuser 23 be set to the air inlet pipe 22 it
On, the bottom of the eddy flow diffuser 23 and the caliber of the air inlet pipe 22 are identical and in communication, the eddy flow diffuser 23
On be provided with several spiral boards；The even spiracular plate 24 is located at 23 top of eddy flow diffuser, the even spiracular plate 24 and institute
The vertical range for stating eddy flow diffuser 23 is greater than 1/6 adsorption tower diameter D, the top for the spiral board being arranged on the eddy flow diffuser 23
Portion's diameter is no more than adsorption tower diameter D, and the diameter of the even spiracular plate 24 is identical as adsorption tower diameter D, the even spiracular plate 24
Percent opening is 50~80%.
The exhaust gas for entering adsorption tower in parallel by air inlet pipe 22, the air-flow of rotational flow is converted into through eddy flow diffuser 23,
Even spiracular plate 24 is uniformly diffused to, then adsorption zone in tower is further dispersed by even spiracular plate 24.23 energy of eddy flow diffuser
It is enough effectively improved distribution situation of the exhaust gas on orifice plate, avoids forming absorption dead zone in tower body, improves the utilization rate of adsorbent
And service life.The deflector 25 is set in qually spaced in tower wall two sides, tilts down 10~30 °, the cross of the deflector 25
It is L, 1/2D to length<L<2/3D.Deflector 25 designs advantages of simple, by changing gas circuit of the exhaust gas in tower, can compared with
Effectively extend residence time of the exhaust gas in tower under lower resistance, improve the adsorption deeply of adsorbent, big flow exhaust gas can be reached
To superior adsorption effect.
The adsorbent 26 select silica gel, activated alumina, active carbon, in molecular sieve any one or combinations thereof, it is special
Not, silica gel/molecular sieve compound adsorbent is selected, i.e., presses one according to the type and characteristic of VOCs in exhaust gas by silica gel and molecular sieve
Certainty ratio mixes compound adsorbent.Adsorbent loads upwards from even spiracular plate, and the space between deflector is filled up step by step,
Finally it is loaded into certain altitude.The silk screen orifice plate 28, which is bolted, to press on adsorbent.It is excessive to can be avoided air-flow
And cause adsorbent boiling fluidisation, generate catalyst fines, to effectively extend adsorbent service life, guarantee that adsorption tower is normal
Operation.The top diameter for the spiral board being arranged on the eddy flow diffuser 23 and be less than or equal to tower diameter, the even spiracular plate 24
Internal diameter is identical as adsorption tower diameter, and percent opening is 50~80%.
Show as preferred embodiment, such as Fig. 4 and Fig. 5, the knockout drum 8 includes can body, is set to the tank
Knockout drum air inlet pipe 801 in main body wall, the knockout drum leakage fluid dram 802 for being set to the can body bottom, be set to it is described
Knockout drum gas outlet 808 at the top of can body and the knockout drum escape pipe 806 for being set to can body inside center, the knockout drum
Air inlet pipe 801 is connect with the condenser 7, and the knockout drum leakage fluid dram 802 is connect with the fluid reservoir 27, and the knockout drum goes out
Tracheae 806 is connect with gas river conjunction 17, and 806 inside center of knockout drum escape pipe is provided with eddy flow bar 805, the separation
Several eddy flow guide plates 804, the tank master are equidistantly provided on the outer surface of tank escape pipe 806 and the eddy flow bar 805
The lower part of body is provided with gas-liquid separation orifice plate 803, as shown in figure 3, being set as raising upward in the middle part of the gas-liquid separation orifice plate 803
Fairing cap 809, the periphery of the fairing cap 809 is provided with circular arc plate 810, and 810 equidistantly distributed of circular arc plate has
Several knockout drum drainage holes 811, the knockout drum leakage fluid dram 2 are connected with liquid seal device, tank body bottom end can be kept to retain for a long time a small amount of
Organic liquid is to form fluid-tight, in order to avoid gas leakage.
Organic exhaust gas is tangentially passed through in tank from knockout drum air inlet pipe 801, and the top for flowing to can body passes through knockout drum outlet
Pipe 806 is discharged, and extends the time of gas-liquid separation in this way, gas is during flow direction, in knockout drum escape pipe 806 and eddy flow
High-speed rotational under the action of eddy flow guide plate 804 on 805 outer surface of bar, organic liquid and tank skin, tube wall through condensing collide
After lose kinetic energy, stick on it, thus realize with turn to gas separation.Organic liquid on tank skin under the effect of gravity from
It is flow to gas-liquid separation orifice plate 803, flow to fluid reservoir 27, re-using or regular outlet certainly through knockout drum leakage fluid dram 802 after.Gas
Liquid separation orifice 3 can promote rotational flow gas to be folded into knockout drum escape pipe 806, carry out depth separation；Gas is avoided simultaneously
Excessive convergence mixes again with the organic liquid of tank bottom, to guarantee more preferably gas-liquid separation effect.The fairing cap 809 is
Circular arc body, top are provided with one layer of anticorrosion rubber.Rubber one can be prevented from the corrosion of organic liquid, second is that can be to gas
Slow down, increases residence time of the gas inside tank, promote the separation of gas liquid.The anticorrosion rubber is polytetrafluoro
Ethylene, the polytetrafluoroethylene (PTFE) with a thickness of 0.1-1mm.The bottom of the knockout drum escape pipe 806 is provided with silk screen filter layer
807.And the gas through cyclonic separation is further separated in outlet bottom of the tube by silk screen layer.The silk screen filter layer 7 with a thickness of
10~50mm.
As preferred embodiment, as shown in fig. 6, the top side detachable of the knockout drum escape pipe 806 be provided with silk
Net filtration layer 7.When organic exhaust gas concentration is higher, preferably silk screen filter layer is installed at the top of escape pipe, in order to replace.It is described
Silk screen filter layer 7 with a thickness of 30~100mm.When organic exhaust gas concentration is higher, thickness can be increased, promote separating effect.
As preferred embodiment, the condenser 7 is provided with liquefied ammonia entrance 2 and ammonia outlet 3, and the condenser 7 is
Horizontal condenser is provided with condenser pipe in the horizontal condenser, and access liquefied ammonia is in the condenser pipe in the liquefied ammonia entrance 2
Circulation.Most VOCs in exhaust gas condensing agent in pipe that is condensed is cooling and condense.Condensation process can directly adopt factory
Existing liquefied ammonia, after condensation, the ammonia being vaporized is delivered in factory and is used.
Embodiment 2
The present embodiment only describes difference from Example 1.
As shown in Figure 1, the adsorption tower unit 10 include the first adsorption tower 11, the second adsorption tower 12, third adsorption tower 13,
4th adsorption tower 14, first adsorption tower 11, the second adsorption tower 12, third adsorption tower 13, the bottom of the 4th adsorption tower 14 are equal
It is provided with absorption valve 18 and desorption valve 19, first adsorption tower 11, the second adsorption tower 12, third adsorption tower the 13, the 4th adsorb
The top of tower 14 is provided with air outlet valve 20, between first adsorption tower 11 and the second adsorption tower 12,13 and of third adsorption tower
Balanced valve 21 is provided between 4th adsorption tower 14, the balanced valve 21 is used to balance the pressure between two towers.As previously mentioned, this
Device is using absorption with pressure, decompression separating process process.Such as terminate to open in the first adsorption tower 11, third adsorption tower absorption 13
Begin desorption, and when the second adsorption tower 12, the 4th adsorption tower 14 desorption terminate will to start absorption, opens the first adsorption tower 11 and the
Balanced valve 21 between two adsorption towers 12, between third adsorption tower 13 and the 4th adsorption tower 14, may be implemented a tower decompression and one
Tower pressurization, after pressure balance, close balanced valve, first, third adsorption tower open desorption valve be further depressured, dropped to pressure
Certain value is opened vacuum pump and is desorbed.The absorption valve 18 is between the knockout drum 8 and the adsorption tower unit
Pipeline on, exhaust gas by the adsorption tower cell processing is discharged by the control of air outlet valve 20 by exhanst gas outlet 15；Use this
When device, the pressure discharged to process units in workshop is compared with the point source emission VOCs that high, concentration is low, flow is big, gas source is stable
Exhaust gas directlys adopt absorption method processing.Adsorption tower unit is provided with 4 vertical adsorption towers, double de- using double suction, in the first absorption
Tower 11, third adsorption tower 13, when being adsorbed, the second adsorption tower 12, the 4th adsorption tower 14 have adsorbed the absorption of a certain amount of VOCs
Tower is desorbed, and is so worked alternatively.When source emission VOCs exhaust gas reaches certain pressure, air intake control system is automatically turned on
Valve 18 is adsorbed, exhaust gas, which enters from bottom to top in two of them adsorption tower, to be adsorbed, and the VOCs in exhaust gas is adsorbed processing, purification
It is drained into atmosphere after up to standard through exhanst gas outlet 15.Adsorption tower has adsorbed a certain amount of VOCs, need to carry out desorption and regeneration.It first turns on
The desorption valve 19 for two adsorption towers that need to be desorbed, it is automatic to be depressured, when system pressure drops to certain value, start the vacuum automatically
Pump 9 carries out vacuum desorption to adsorption tower, VOCs is thoroughly deviate from.The desorption gas of the VOCs containing high concentration caused by desorption process
It extracts out, and is delivered in surge tank 5 from below adsorption tower through the vacuum pump 9, after being mixed with uncontrollable discharge VOCs exhaust gas, one
VOCs is recycled with through condensation method.Therefore, can be realized by vacuum pump 9 it is with pressure absorption, decompression separating process process.
Application Example
When using the present apparatus, VOCs exhaust gas is mixed into the surge tank 5, and the pressure sensor in the surge tank 5 is aobvious
Show that pressure reaches certain value, start the air blower 6, after gaseous mixture is boosted to operating pressure, then it is delivered to from tank deck
In the condenser 7, most VOCs in exhaust gas are cooling by the condensing agent of the condenser 7 and condense.When pressure reaches
900-1400kPa starts air blower automatically, gaseous mixture is boosted to (excellent after operating pressure (condensing pressure) 1800-2800kPa
Select 2600kPa), then it is delivered in horizontal condenser from tank deck.The overwhelming majority (90% or more) VOCs in exhaust gas is cold
Condensing agent in solidifying pipe is cooling and condenses.System of the present invention is used for process for producing workshop VOCs exhaust gas, clean-up effect is such as
Shown in following table.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to the one of invention
A little modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (10)
1. a kind of efficient Integrated Processing Unit of organic exhaust gas, which is characterized in that including passing through the sequentially connected buffering of flue
Tank, air blower, condenser, knockout drum and adsorption tower unit are set between the knockout drum and the adsorption tower unit
It is equipped with gas river conjunction, uncontrollable discharge VOCs exhaust gas enters surge tank from uncontrollable discharge smoke inlet, puts source emission VOCs
Exhaust gas enters gas river conjunction by point source discharge gas entrance, and the gas river conjunction passes through absorption pipeline and adsorption tower unit
It connects, is provided with absorption valve on the absorption pipeline, is provided with air outlet valve on the outlet pipe at the top of the adsorption tower, by place
The uncontrollable discharge VOCs exhaust gas of reason enters absorption with untreated source emission VOCs exhaust gas after gas river conjunction mixes
Tower unit carries out adsorption treatment, is discharged by opening air outlet valve by exhanst gas outlet after being disposed；
The adsorption tower unit connects vacuum pump by desorption pipeline, and the desorption pipeline is provided with desorption valve, the vacuum pump
It being connect with surge tank, the desorption gas of the adsorption tower unit is then passed through in the surge tank by the vacuum pump from bottom to top, from
The uncontrollable discharge VOCs exhaust gas that workshop is collected is mixed with desorption gas mixed flow, and the surge tank is provided with pressure sensor；It is described
Condenser and the knockout drum are connect with fluid reservoir, and the fluid reservoir is provided with waste liquid outlet.
2. processing unit according to claim 1, which is characterized in that the adsorption tower unit includes adsorption tower, the suction
The air inlet pipe that sets gradually inside attached tower along the exhaust gas direction of motion, eddy flow diffuser, even spiracular plate, deflector, silk screen orifice plate and
Escape pipe, the adsorption tower inner space between the even spiracular plate and the silk screen orifice plate are filled with adsorbent.
3. the apparatus of claim 2, which is characterized in that the air inlet pipe is set to the bottom of adsorption tower, the rotation
Flow diffuser is set on the air inlet pipe, and the bottom of the eddy flow diffuser is identical as the caliber of the air inlet pipe and therewith
It is connected to, is provided with several spiral boards on the eddy flow diffuser；The even spiracular plate is located above the eddy flow diffuser, described
The vertical range of even spiracular plate and the eddy flow diffuser is greater than 1/6 adsorption tower diameter, the rotation being arranged on the eddy flow diffuser
The top diameter of flowing plate is no more than adsorption tower diameter, and the diameter of the even spiracular plate is identical as adsorption tower diameter, the even stomata
Packing free ratio is 50~80%.
4. the apparatus of claim 2, which is characterized in that the adsorbent be silica gel, activated alumina, active carbon,
In molecular sieve any one or combinations thereof, the silk screen orifice plate, which is bolted, to press on adsorbent.
5. the apparatus of claim 2, which is characterized in that the knockout drum include can body, be set to it is described
Knockout drum air inlet pipe on can body side wall, is set to the tank master at the knockout drum leakage fluid dram for being set to the can body bottom
Knockout drum gas outlet at the top of body and the knockout drum escape pipe for being set to can body inside center, the knockout drum air inlet pipe and institute
Condenser connection is stated, the knockout drum leakage fluid dram is connect with the fluid reservoir, and the knockout drum escape pipe crosses with the gas
Mouthful connection, the knockout drum escape pipe inside center are provided with eddy flow bar, the knockout drum escape pipe and the eddy flow bar it is outer
Several eddy flow guide plates are equidistantly provided on surface.
6. device according to claim 5, which is characterized in that the lower part of the can body is provided with gas-liquid separation orifice plate,
It is set as the fairing cap to raise upward in the middle part of the gas-liquid separation orifice plate, the periphery of the fairing cap is provided with circular arc plate, institute
Stating circular arc plate equidistantly distributed has several knockout drum drainage holes, and the knockout drum leakage fluid dram is connected with liquid seal device.
7. device according to claim 6, which is characterized in that the fairing cap is circular arc body, and top is provided with anticorrosion
Rubber；The anticorrosion rubber be polytetrafluoroethylene (PTFE), the polytetrafluoroethylene (PTFE) with a thickness of 0.1-1mm.
8. according to device described in claim 5 or 6 or 7, which is characterized in that the bottom or top of the knockout drum escape pipe are set
It is equipped with silk screen filter layer；The silk screen filter layer with a thickness of 10~100mm.
9. device according to claim 2 or 5, which is characterized in that the condenser is provided with liquefied ammonia entrance and ammonia goes out
Mouthful, the condenser is horizontal condenser, is provided with condenser pipe in the horizontal condenser, accesses liquefied ammonia in the liquefied ammonia entrance
It circulates in the condenser pipe.
10. the apparatus of claim 2, which is characterized in that the adsorption tower unit includes the first adsorption tower, the second suction
Attached tower, third adsorption tower, the 4th adsorption tower, first adsorption tower, the second adsorption tower, third adsorption tower, the 4th adsorption tower
Bottom is provided with absorption valve and desorption valve, first adsorption tower, the second adsorption tower, third adsorption tower, the 4th adsorption tower
Top is provided with air outlet valve, between first adsorption tower and the second adsorption tower, between third adsorption tower and the 4th adsorption tower
It is provided with balanced valve, the absorption valve passes through on the pipeline between the knockout drum and the adsorption tower unit
The exhaust gas of the adsorption tower cell processing is controlled by air outlet valve and is discharged by exhanst gas outlet.
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| CN111437690A (en) * | 2020-04-01 | 2020-07-24 | 安徽晋煤中能化工股份有限公司 | Organic waste gas treatment system for producing hydrogen peroxide by anthraquinone process |
| CN111437691A (en) * | 2020-04-01 | 2020-07-24 | 安徽晋煤中能化工股份有限公司 | Organic waste gas treatment method for producing hydrogen peroxide by anthraquinone process |
| CN114425220A (en) * | 2020-10-15 | 2022-05-03 | 中国石油化工股份有限公司 | Tetrahydrofuran-containing tail gas treatment method, system and application |
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