CN108722104A - A kind of device of efficient process uncontrollable discharge VOCs - Google Patents

A kind of device of efficient process uncontrollable discharge VOCs Download PDF

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Publication number
CN108722104A
CN108722104A CN201810939459.6A CN201810939459A CN108722104A CN 108722104 A CN108722104 A CN 108722104A CN 201810939459 A CN201810939459 A CN 201810939459A CN 108722104 A CN108722104 A CN 108722104A
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CN
China
Prior art keywords
adsorption tower
knockout drum
gas
condenser
vocs
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Pending
Application number
CN201810939459.6A
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Chinese (zh)
Inventor
杨颖欣
钟璐
胡小吐
刘勇
胡静龄
薛学良
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Guangdong Jiade Environmental Protection Technology Co Ltd
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Guangdong Jiade Environmental Protection Technology Co Ltd
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Priority to CN201810939459.6A priority Critical patent/CN108722104A/en
Publication of CN108722104A publication Critical patent/CN108722104A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/002Separation 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/02Separation 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
    • B01D53/04Separation 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2253/00Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25Coated, impregnated or composite adsorbents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/70Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708Volatile organic compounds V.O.C.'s
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/40Further details for adsorption processes and devices
    • B01D2259/40083Regeneration of adsorbents in processes other than pressure or temperature swing adsorption

Abstract

The present invention is a kind of device of efficient process uncontrollable discharge VOCs, including passing through the sequentially connected surge tank of flue, air blower, condenser, knockout drum and adsorption tower unit, the adsorption tower unit is connected with vacuum pump by the way that pipeline is desorbed, the desorption pipeline is provided with desorption valve, the vacuum pump is 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, and the surge tank is provided with pressure sensor;The condenser and the knockout drum are connect with fluid reservoir, and the fluid reservoir is provided with waste liquid outlet.The present apparatus combines the advantages of condensation method and absorption method, form can efficient stable operation comprehensive processing technique flow, the newest discharge standard of country, and non-secondary pollution can be reached under lower investment and operating cost.

Description

A kind of device of efficient process uncontrollable discharge VOCs
Technical field
The present invention relates to environmental technology fields, relate to the use of the method for physical technique means processing VOCs gases, specifically relate to And a kind of device of efficient process uncontrollable discharge VOCs.
Background technology
Organic exhaust gas, also referred to as VOCs include mainly hydro carbons, aromatic hydrocarbons, alcohols, aldehydes, ketone, lipid, amine and organic Acid etc., it is generally recognized that fusing point is less 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, health can also be caused sternly It endangers again.VOCs Treatment process can be divided into two classes:When recovery technology, by temperature, the pressure etc. that change certain technical process Physical condition makes VOCs enrichment and separations, is preferentially recycled, and further innoxious place is taken 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 micromolecular compound of the nonhazardous such as O or low toxicity evil, makes VOCs processing mainly has combustion method, lower temperature plasma technology, Photocatalyst and biotechnology etc..
In the workshop of the industries such as oil, 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 refer to process units in technical process discharge, exhaust gas pressure is higher, concentration and Flow is stablized relatively;Uncontrollable discharge then not necessarily has direct relation with a certain specific production process or device, in fact it could happen that Each position in workshop, such as valve, flange, storage tank, cooling tower or circulating water cooling system, exhaust gas pressure is relatively low, 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 retracting devices, including adsorption system, VOCs take off Attached condensation collection system and refrigeration system, include 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 systems of desorption recycling, and VOCs desorption condensation collection systems are provided with for it simultaneously The refrigeration system of condensing recovery connects.Technical solution VOCs treatment effeciencies are 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 discharges, 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, there is an urgent need for designing a kind of Treatment process combined route of reasonable, to realize workshop uncontrollable discharge VOCs exhaust gas efficient integrated treatment.
Invention content
The object of the present invention is in view of the drawbacks of the prior art, develop a kind of dress of efficient process uncontrollable discharge VOCs It sets, using " condensation+absorption " comprehensive treatment technique route, realizes that the equal of the VOCs exhaust gas of uncontrollable discharge can efficient General Office Reason.It is described that technical scheme is as follows.
A kind of device of efficient process uncontrollable discharge VOCs, including pass through the sequentially connected surge tank of flue, drum Wind turbine, condenser, knockout drum and adsorption tower unit, uncontrollable discharge VOCs exhaust gas enter from uncontrollable discharge smoke inlet Surge tank, the knockout drum are connect by adsorbing pipeline with adsorption tower unit, and absorption valve is provided on the absorption pipeline, Air outlet valve is provided on outlet pipe at the top of the adsorption tower, treated uncontrollable discharge VOCs exhaust gas enters adsorption tower Unit is discharged by opening air outlet valve by exhanst gas outlet after carrying out adsorption treatment;
The adsorption tower unit is connected with vacuum pump by the way that pipeline is desorbed, and the desorption pipeline is provided with desorption valve, described Vacuum pump is connect with surge tank, and the desorption gas of the adsorption tower unit is then passed through the surge tank by the vacuum pump from bottom to top Interior, the surge tank is provided with pressure sensor;The condenser and the knockout drum are connect with fluid reservoir, the storage Flow container is provided with waste liquid outlet.
, concentration relatively low 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 is in surge tank mixed flow caused by uncontrollable discharge VOCs exhaust gas and desorption process 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 to from tank deck in the condenser, most VOCs in exhaust gas are by the condenser Condensing agent is cooling and condenses.Condensed exhaust gas 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 adsorption tower unit and carries out adsorption treatment, and the organic liquid of condenser and gas-liquid separation pot bottom is flow to certainly The fluid reservoir is re-used or is arranged by the way that the waste liquid outlet is periodically outer.
To sum up, the present apparatus combines the advantages of condensation method and absorption method, and high concentration VOCs exhaust gas is detached 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 flow 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, set successively along the exhaust gas direction of motion inside the adsorption tower 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, and several rotations are provided 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 more than 1/6 adsorption tower diameter D, 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%.
By the parallel exhaust gas into adsorption tower of 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 both 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, superior suction is attained by big flow exhaust gas Attached effect.
Preferably, the adsorbent selects any one or its in silica gel, activated alumina, activated carbon, 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 avoid gas It flows through big and causes adsorbent boiling fluidisation, generates catalyst fines, to effectively extend adsorbent service life, ensure absorption Tower normal operation.
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, the knockout drum escape pipe is connect with the adsorption tower unit, 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 The lower part of eddy flow guide plate, the can body is 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 up, the periphery of the fairing cap is provided with circular arc tablet, the circular arc tablet equidistantly distributed There are several knockout drum drainage holes, the knockout drum leakage fluid dram to be connected with liquid seal device, 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 Go out, extend the time of gas-liquid separation in this way, 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 condensed organic liquid and tank skin, tube wall collision, be attached on Thereon, the separation to realize with turn to gas.Organic liquid on tank skin flow to gas-liquid separation orifice plate certainly under the effect of gravity, Through knockout drum leakage fluid dram from fluid reservoir is flow to after, re-uses or arranged outside regular.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 ensure 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 is polytetrafluoroethylene (PTFE), and the thickness of the polytetrafluoroethylene (PTFE) is 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 Thickness be 10-100mm.Gas through cyclonic separation is further detached 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 thickness of the silk screen filter layer is 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 Thickness of the net filtration layer at top is 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 agents in pipe that are condensed are cooling and condense.Condensation process can directly use factory to 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 both provided with absorption valve and desorption Valve, first adsorption tower, third adsorption tower, are both 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 both 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.Adsorption tower unit is provided with 4 vertical adsorption towers, double de- using double suction, first When adsorption tower, third adsorption tower are adsorbed, the adsorption tower that the second adsorption tower, the 4th adsorption tower have adsorbed a certain amount of VOCs carries out Desorption so works alternatively.Adsorption tower has adsorbed a certain amount of VOCs, need to carry out desorption and regeneration.First turn on need to be desorbed two The desorption valve of a adsorption tower, it is automatic to be depressured, when system pressure drops to certain value, start the vacuum pump automatically, to adsorption tower Vacuum desorption is carried out, VOCs is thoroughly deviate from.The desorption gas of the VOCs containing high concentration is through the vacuum pump caused by desorption process It extracts out, and is delivered in surge tank below from adsorption tower, after being mixed with uncontrollable discharge VOCs exhaust gas, condensed method recycling together VOCs.Therefore, can be realized by vacuum pump it is with pressure absorption, decompression separating 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 detached 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 operation Comprehensive processing technique flow, the newest discharge standard of country can be reached, and without secondary under lower investment and operating cost Pollution.
(2) the rational 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, has that large specific surface area, adsorption efficiency is high, selectivity is good, high intensity, wear-resisting And regenerability it is good the advantages that, it can be achieved that splendid adsorption effect.
(3) adsorption tower unit coordinates advanced, reliable automation control using absorption with pressure, decompression separating process flow Program can either effectively deviate from the VOCs adsorbed when carrying out desorption and regeneration to adsorbent, and can ensure 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.
Description of the drawings
2 flowage structure schematic diagram of Fig. 1 embodiments;
1 flow diagram of Fig. 2 embodiments;
Fig. 3 adsorption tower unit partial enlarged views;
Fig. 4 knockout drum partial enlarged views;
The fairing cap partial enlarged view of Fig. 5 knockout drums;
The partial enlarged view of another embodiment of Fig. 6 knockout drums.
Reference numeral:Uncontrollable discharge smoke inlet 1, liquefied ammonia entrance 2, ammonia outlet 3, surge tank 5, air blower 6, condensation Device 7, knockout drum 8, knockout drum air inlet pipe 801, knockout drum leakage fluid dram 802, gas-liquid separation orifice 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 are flat Plate 810, knockout drum drainage hole 811, vacuum pump 9, adsorption tower unit 10, the first adsorption tower 11, the second adsorption tower 12, third absorption Tower 13, the 4th adsorption tower 14, exhanst gas outlet 15, waste liquid outlet 16, fluid reservoir 17, absorption valve 18, desorption valve 19, air outlet valve 20, Balanced valve 21, air inlet pipe 22, eddy flow distributor 23, even spiracular plate 24, deflector 25, adsorbent 26, silk screen orifice plate 28, escape pipe 29。
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings:
Embodiment 1
A kind of device of efficient process uncontrollable discharge VOCs, as shown in Fig. 2, including sequentially connected by flue Surge tank 5, air blower 6, condenser 7, knockout drum 8 and adsorption tower unit 10, the uncontrollable discharge VOCs collected from workshop Exhaust gas enters surge tank 5 from uncontrollable discharge smoke inlet 1, and the knockout drum 8 is by adsorbing pipeline and adsorption tower unit 10 connect, and absorption valve 18 is provided on the absorption pipeline, air outlet valve 20 is provided on the outlet pipe at the top of the adsorption tower, Treated uncontrollable discharge VOCs exhaust gas enters after adsorption tower unit 10 carries out adsorption treatment and is led to by opening air outlet valve 20 Cross the discharge of exhanst gas outlet 15;
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 is connect with surge tank 5, and the desorption gas of the adsorption tower unit 10 is then passed through by the vacuum pump 9 from bottom to top In the surge tank 5, the surge tank 5 is provided with pressure sensor (not shown);The condenser 7 and the knockout drum 8 connect with the fluid reservoir 17, and the fluid reservoir 17 is provided with waste liquid outlet 16.
, concentration relatively low 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 to from tank deck in the condenser 7, most VOCs in exhaust gas are by the condensation The condensing agent of device 7 is cooling and condenses.Condensed exhaust gas is passed through in the knockout drum 8, and organic liquid is left on the gas In liquid knockout drum 8, tail gas then enters adsorption tower unit 10 and carries out adsorption treatment, and condenser 7 is organic with 8 bottom of knockout drum Liquid self-flowing is re-used or is arranged by the way that the waste liquid outlet 16 is periodically outer to the fluid reservoir 17.
To sum up, the present apparatus combines the advantages of condensation method and absorption method, and high concentration VOCs exhaust gas is detached 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 flow 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 is identical and in communication as the caliber of the air inlet pipe 22, the eddy flow diffuser 23 On be provided with several spiral boards;The even spiracular plate 24 is located at 23 top of the eddy flow diffuser, the even spiracular plate 24 and institute The vertical range for stating eddy flow diffuser 23 is more 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%.
By the parallel exhaust gas into adsorption tower of 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 both sides, tilts down 10-30 °, the transverse direction of the deflector 25 Length is L, 1/2D<L<2/3D.Deflector 25 designs advantages of simple, can be relatively low by changing gas circuit of the exhaust gas in tower Effectively extend residence time of the exhaust gas in tower under resistance, improve the adsorption deeply of adsorbent, big flow exhaust gas is attained by Superior adsorption effect.
The adsorbent 26 selects any one in silica gel, activated alumina, activated carbon, molecular sieve or combinations thereof, 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.Air-flow can be avoided excessive And cause adsorbent boiling fluidisation, generate catalyst fines, to effectively extend adsorbent service life, ensure 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, percent opening 50-80%.
As shown in Figure 4 and Figure 5, the knockout drum 8 includes can body, the separation being set on the can body side wall Canister incoming gas pipe 801, the knockout drum leakage fluid dram 802 for being set to the can body bottom, the separation being set at the top of the can body Tank gas outlet 808 and the knockout drum escape pipe 806 for being set to can body inside center, the knockout drum air inlet pipe 801 with it is described Condenser 7 connects, and the knockout drum leakage fluid dram 802 is connect with the fluid reservoir 17, the knockout drum escape pipe 806 and the suction Attached tower unit 10 connects, and 806 inside center of knockout drum escape pipe is provided with eddy flow bar 805, the knockout drum escape pipe 806 Be equidistantly provided with several eddy flow guide plates 804 on the outer surface of the eddy flow bar 805, the lower part setting of the can body There is gas-liquid separation orifice plate 803, as shown in figure 3,803 middle part of the gas-liquid separation orifice plate is set as the fairing cap to raise up 809, The periphery of the fairing cap 809 is provided with circular arc tablet 810, and 810 equidistantly distributed of circular arc tablet has several knockout drums to arrange Fluid apertures 811, the knockout drum leakage fluid dram 2 are connected with liquid seal device, and tank body bottom end can be kept to retain a small amount of organic liquid with shape for a long time At 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, condensed organic liquid are collided with tank skin, tube wall After lose kinetic energy, stick on it, to 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, through knockout drum leakage fluid dram 802 from fluid reservoir 17 is flow to after, re-uses or is arranged outside regular.Gas Liquid separation orifice 3 can promote rotational flow gas to be folded into knockout drum escape pipe 806, carry out depth separation;Avoid gas simultaneously Excessive convergence mixes again with the organic liquid of tank bottom, to ensure 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 The thickness of ethylene, the polytetrafluoroethylene (PTFE) is 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 detached in outlet bottom of the tube by silk screen layer.The thickness of the silk screen filter layer 7 is 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 The thickness of silk screen filter layer 7 is 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 agents in pipe that are condensed are cooling and condense.Condensation process can directly use factory Have 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 both provided with air outlet valve 20, between first adsorption tower, 11 and second adsorption tower 12,13 and of third adsorption tower Balanced valve 21 is both 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 flow.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 be pressurized, after pressure balance, close balanced valve, first, third adsorption tower open desorption valve be further depressured, wait for that pressure drops to 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 controlled by air outlet valve 20 and is discharged by exhanst gas outlet 15.Adsorption tower Unit is provided with 4 vertical adsorption towers, double de- using double suction, the first adsorption tower 11, third adsorption tower 13, adsorbed when, The adsorption tower that second adsorption tower 12, the 4th adsorption tower 14 have adsorbed a certain amount of VOCs is desorbed, and is so worked alternatively.Adsorption tower A certain amount of VOCs has been adsorbed, desorption and regeneration need to be carried out.The desorption valve 19 for two adsorption towers that need to be desorbed is first turned on, it is automatic to drop Pressure, when system pressure drops to certain value, starts the vacuum pump 9 automatically, and vacuum desorption is carried out to adsorption tower, and VOCs is thorough Abjection.The desorption gas of the VOCs containing high concentration caused by desorption process is extracted out through the vacuum pump 9 from below adsorption tower, and is conveyed Into surge tank 5, after being mixed with uncontrollable discharge VOCs exhaust gas, condensed method recycles VOCs together.Therefore, vacuum can be passed through Pump 9 can realize it is with pressure absorption, decompression separating process flow.
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 by the condensing agent cooling of the condenser 7 and are condensed.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 to from tank deck in horizontal condenser.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 changed.Therefore, the invention is not limited in specific implementation modes 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 device of efficient process uncontrollable discharge VOCs, which is characterized in that including sequentially connected by flue Surge tank, air blower, condenser, knockout drum and adsorption tower unit, uncontrollable discharge VOCs exhaust gas is from uncontrollable discharge cigarette Gas entrance enters surge tank, and the knockout drum is connect with adsorption tower unit by adsorbing pipeline, set on the absorption pipeline It is equipped with absorption valve, air outlet valve is provided on the outlet pipe at the top of the adsorption tower, treated uncontrollable discharge VOCs is useless Gas, which enters after adsorption tower unit carries out adsorption treatment, to be discharged by opening air outlet valve by exhanst gas outlet;
The adsorption tower unit is connected with vacuum pump 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 in the surge tank by the vacuum pump from bottom to top, The surge tank is provided with pressure sensor;The condenser and the knockout drum are connect with fluid reservoir, the liquid storage Tank is provided with waste liquid outlet.
2. the apparatus according to claim 1, which is characterized in that the adsorption tower unit includes adsorption tower, the adsorption tower Inside sets gradually air inlet pipe, eddy flow diffuser, even spiracular plate, deflector, silk screen orifice plate and escape pipe along the exhaust gas direction of motion, Adsorption tower inner space between the even spiracular plate and the silk screen orifice plate is 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, several spiral boards is provided 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 more 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, activated 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 includes can body, it is described to be set to 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, the knockout drum escape pipe and the adsorption tower list Member 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 up in the middle part of the gas-liquid separation orifice plate, the periphery of the fairing cap is provided with circular arc tablet, institute Stating circular arc tablet equidistantly distributed has several knockout drum drainage holes, the knockout drum leakage fluid dram to be 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 is polytetrafluoroethylene (PTFE), and the thickness of the polytetrafluoroethylene (PTFE) is 0.1-1mm.
8. according to the 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 thickness of the silk screen filter layer is 10-100mm.
9. the 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, liquefied ammonia is accessed 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 both provided with absorption valve and desorption valve, first adsorption tower, the second adsorption tower, third adsorption tower, the 4th adsorption tower Top is both 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 both 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.
CN201810939459.6A 2018-08-17 2018-08-17 A kind of device of efficient process uncontrollable discharge VOCs Pending CN108722104A (en)

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CN110124440A (en) * 2019-04-28 2019-08-16 山东盛阳集团有限公司 A kind of cokingization production system VOCs comprehensive management of technology
CN114225655A (en) * 2021-11-23 2022-03-25 安徽金禾实业股份有限公司 Sucrose esterification dehydration condensation device and method

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