CN105944500B - The cellular VOCs adsorption/desorptions device and method of fixed-bed type - Google Patents
The cellular VOCs adsorption/desorptions device and method of fixed-bed type Download PDFInfo
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- CN105944500B CN105944500B CN201610490129.4A CN201610490129A CN105944500B CN 105944500 B CN105944500 B CN 105944500B CN 201610490129 A CN201610490129 A CN 201610490129A CN 105944500 B CN105944500 B CN 105944500B
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- 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
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The present invention relates to gas handling techniques, it is desirable to provide a kind of cellular VOCs adsorption/desorptions device and method of fixed-bed type.The device includes the absorption bed unit that heap is filled with sorbing material, and absorption bed unit has multiple and is installed in parallel, and constitutes adsorbent bed module；Adsorbing bed unit, there is outer framework, inner wall to set insulated lining；The inlet end of each absorption bed unit is separately connected inlet channel, and exhaust end is then separately connected exhaust passage；Inlet channel connects hot-air and gas inlet pipeline and realizes that air inlet switches, and exhaust passage connects purified gas and desorption feed channel and to realize exhaust switching；Gas concentration detection apparatus is set in purification feed channel, and PLC control unit is connected to by signal wire.The bed unit alternation state in adsorption and desorption, cooling successively is respectively adsorbed in the present invention, absorption bed unit is in continuous more new state, without rotation absorption bed unit, energy-saving consumption-reducing.Each absorption bed unit is relatively independent, uniform specification, easy to produce and dismounting, and regeneration is convenient.
Description
Technical field
The present invention relates to a kind of gas handling techniques, more particularly to a kind of large-wind-volume low-concentration fixed-bed type VOCs gases are inhaled
Attached desorption processing unit and method belong to environmental protection and chemical field.
Background technology
At the beginning of 2013, the national territorial area in China about 1/4 is influenced by lasting haze weather, causes severe and serious dirt
Phenomena such as dye, impacted population about 600,000,000, hospital is full, aircraft grounds, frequently occurs, and is caused to the economy and social development in China
It seriously affects.PM2.5 is to cause one of arch-criminal of haze, and as generally acknowledged PM2.5 presomas, volatile organic compounds
(VOCs) petrochemical industry, organic chemical industry, synthetic material, the manufacture of chemicals active compound, plastic product manufacture, equipment manufacturing are mainly derived from
The key industrys such as application, communications device computer and other electronic equipment manufacturings, packages printing, such discharge amount of exhaust gas is big, dirty
Dye region is not only limited near pollution sources, also by Atmospheric Diffusion to entire city and region, is brought to environment huge
Harm, is directly or indirectly detrimental to health, influences atmosphere quality.With the getting worse that VOCs pollutes, effectively control
It is extremely urgent to manage VOCs, improvement atmospheric environment.China in recent years pays much attention to this, has worked out a series of relevant policies marks
Standard is determined to reinforce the prevention of heavy polluted industry VOCs exhaust gas.
Mainly there are condensation method, absorption process, combustion method, Production by Catalytic Combustion Process, absorption for the Treatment process of VOCs exhaust gas at present
Method, adsorption-catalysis incineration method, and the domestic and international new method studied, including Purification biotechnology, ionization technology
Deng.In the various VOCs treatment technologies, adsorption technology is primary key.Only first the pollutant component in exhaust gas is cut
Post-processing could be carried out by staying.At present for Wind Volume, the organic exhaust gas of low concentration, mainly adsorbed using fixed bed
Desorption concentration, then burned or be catalyzed the treating method of burning.General fixed adsorption bed includes absorption air inlet, one
A absorption gas outlet, a desorption air inlet and a desorption gas outlet, adsorbent are fixed on inside an adsorbent bed, adsorb
Measure small, adsorption layer is easy to reach saturation state and breakdown, needs periodically to be desorbed, can not be carried out at the same time adsorption/desorption, work
Make less efficient.
A kind of purifier of processing organic exhaust gas as disclosed in Chinese patent 93222819.4, mainly by filling honeycomb
Purification system is formed in the adsorbent bed and catalytic combustor of activated carbon, and has dedicated prefilter and three-way switch valve door, is made
Obtain Adsorption Concentration, catalysis is burnt, desorption and regeneration process is all completed in system.But these three processes cannot be in the apparatus
The same time completes, but is switched by three-way valve and realize that substep is completed.There is one kind disclosed in Chinese patent 01274679.7
Machine exhaust treatment system, Adsorption Concentration, catalysis burning, desorption and regeneration process can be achieved to automatically control completion, but still be sublevel
Section is completed.
Toshimi Kuma in 1989 are put forward for the first time using runner adsorption/desorption device, may be implemented adsorption/desorption simultaneously into
Row, and realize industrial applications in Japan, TaiWan, China etc..China also occurs of all kinds based on runner successively at present
The adsorption/desorption device of structure.As Chinese patent 200820146326.5 discloses a kind of rotary-type organic exhaust gas adsorption and desorption dress
It sets, the adsorbent layer of the device forms continuous adsorption/desorption system during rotation, and adsorbent layer is in continuous update
State, not only increase adsorbance and also improve working efficiency.China Patent Publication No. 202087198U proposes one kind and changes
Into zeolite concentration rotating wheel on-line regeneration facility, switch the direction that becomes a mandarin of rotary wheel regeneration air-flow using switching valve group, make runner
Front and back two sides is evenly heated regeneration activating, improves the activation efficiency of runner.
However, there is also some shortcomings for runner, as diameter and its of runner are handled, air quantity is related, and processing air quantity is different, turns
The diameter of wheel is also different, is difficult to realize the standardized production of runner.When processing air quantity is larger, the diameter of runner also mutually strains
Greatly, the intensity of runner declines.And the method for using addition rigid material to improve runner intensity, the weight of runner can be made also corresponding
Increase, the load of driving motor increases, and increases energy consumption.Simultaneously as entire adsorbent bed is rotated, movable members are more, limitation
The service life of runner.In addition the problem of runner is there is also in terms of some regeneration are such as susceptible to according to activation on line bored
The phenomenon that combustion, regeneration activating then requires the dismounting of runner under line and the specification requirement of fire device is stringent etc..
Invention content
The technical problem to be solved by the present invention is to overcome deficiency in the prior art.It is cellular to provide a kind of fixed-bed type
VOCs adsorption/desorption device and methods.
To solve technical problem, solution of the invention is：
A kind of cellular VOCs adsorption/desorptions device of fixed-bed type is provided, including internal heap is filled with the adsorbent bed of sorbing material
Unit；The absorption bed unit has multiple and is installed in parallel, and constitutes adsorbent bed module；Adsorbing bed unit has outer framework, in
Wall sets insulated lining；The inlet end of each absorption bed unit is separately connected respective inlet channel, and exhaust end is then separately connected respectively
From exhaust passage；
The inlet channel through air inlet triple valve is connected to hot-air duct and gas inlet pipeline to realize that air inlet switches,
Exhaust passage is connected to purification feed channel and desorption feed channel to realize exhaust switching through exhaust three-way valve；The purification feed channel
It is equipped with gas concentration detection apparatus, and PLC control unit is connected to by signal wire；PLC control unit is by signal wire and respectively
Triple valve connects, and controls the switching action of each triple valve respectively.
In the present invention, the adsorbent bed module is closed rectangular parallelepiped structure；Its both ends is respectively air inlet gas chamber and exhaust
Gas chamber, middle part are the absorption bed unit being installed in parallel in collection pencil；
The inlet channel of each absorption bed unit both passes through air inlet gas chamber, and connects with hot-air duct on the outside of adsorbent bed module
It connects；The air inlet triple valve is set on the indoor inlet channel of air inlet gas, and gas inlet pipeline is then connected to the side wall of air inlet gas chamber
On；
The exhaust passage of each absorption bed unit both passes through discharge plenum, and connects with desorption feed channel on the outside of adsorbent bed module
It connects；The exhaust three-way valve is set on the exhaust passage in discharge plenum, and purification feed channel is then connected on the side wall of discharge plenum.
In the present invention, the air inlet triple valve and exhaust three-way valve are two-position three way plate valve, and valve plate is pivoted
Angle be 90 °, valve plate be equipped with sealing ring.
In the present invention, the section of the inlet channel and exhaust passage is rectangle, the air inlet triple valve and exhaust three
The valve plate of port valve has matched shape.
In the present invention, heating device is set on the hot-air duct, temperature sensor, warm-air pipe are equipped in inlet channel
Road is connected by electric control valve with cold air duct is mended, and heating device, temperature sensor and electric control valve are connected to PLC by signal wire
Control unit.
In the present invention, gas gathering mask, exhaust end and exhaust are equipped between the inlet end and inlet channel of the absorption bed unit
Gaseous diffuser is equipped between channel.
Invention further provides the methods for realizing VOCs adsorption/desorptions using aforementioned device, specifically include：
(1) exhaust gas adsorption treatment
PLC control unit controls the open state of some absorption bed unit corresponding air inlet triple valve and exhaust three-way valve,
So that the pending exhaust gas containing VOCs is introduced into gas channel from gas inlet pipeline, by absorption bed unit and discharge duct after from
Purify feed channel discharge；
(2) desorption of bed unit is adsorbed
Gas concentration detection apparatus on-line analysis purifies the VOCs concentration in feed channel, and transmits and believe to PLC control unit
Number；When concentration exceeds preset value, PLC control unit controls the open state of air inlet triple valve and exhaust three-way valve, makes the suction
Attached bed unit is switched to be connected to hot-air duct and desorption feed channel, is carried out to sorbing material with importing hot-air or hot steam
Desorption；Pneumatic transmission to follow up device is desorbed and carries out advanced treating；
In desorption process, when the temperature of hot-air or hot steam for desorption is higher than setting value, PLC control unit is opened
It opens electric control valve and connects benefit cold air duct, cool down to hot-air or hot steam；When the temperature of hot-air or hot steam is less than
When setting value, PLC control unit opens the heating device on hot-air duct, is heated to hot-air or hot steam；
(3) cooling after being desorbed
The pending exhaust gas containing VOCs is directly introduced into gas channel, PLC control unit control from gas inlet pipeline
The open state of air inlet triple valve and exhaust three-way valve makes pending exhaust gas after absorption bed unit and discharge duct from desorption
Feed channel is discharged, and send to follow up device and carries out advanced treating, is completed at the same time the cooling to adsorbing bed unit after desorption；
(4) continuous to run in turn
Required adsorbent bed unit number in adsorbent bed module is determined according to the average single run time of absorption bed unit
Amount, and the sequence and time that each absorption bed unit puts into operation successively are set in PLC control unit, keep adsorbent bed mould in the block
Adsorb the bed unit alternation state in adsorption and desorption, cooling successively；Meanwhile it being determined according to whole loads of exhaust-gas treatment
The quantity of adsorbent bed module, to ensure to inhale the continuous operation of each attached bed module.
In the present invention, the air quantity of the pending exhaust gas is 2000~200000m3/ h, VOCs's is dense in pending exhaust gas
Degree is 200~1500mg/m3；It is 1 to the cocnentration factor of VOCs to adsorb bed unit:(10~50), gas is by adsorbing bed unit
Flow velocity is 0.8~1.2m/s, and the pressure loss is less than 2.0kPa.
In the present invention, it includes carrier and adsorbent to adsorb sorbing material used in bed unit；The carrier is ceramic honeycomb
Fibrous paper is made using corrugated paper preparation process, and stupefied high and stupefied width is than H: L 1: (0.5~2)；The filling mode of carrier uses
Orthogonal arrangement, circular arrangement or mode arranged in parallel；The adsorbent is zeolite molecular sieve or carbon molecular sieve；Adsorbent passes through
Infusion process or suction pump cladding process are supported on absorption carrier.
Compared with prior art, the present invention has the following advantages：
(1) each absorption bed unit alternation state in adsorption and desorption, cooling successively, absorption are realized by valve transfer
Bed unit is in continuous more new state, without rotating absorption bed unit, energy-saving consumption-reducing.
(2) respectively absorption bed unit is relatively independent, uniform specification, easy to produce and dismounting, and regeneration is convenient.
(3) ceramic honeycomb fibrous paper uses the preparation process of corrugated paper, mature preparation process that can realize that assembly line is given birth to
Production.The filling of bed unit is adsorbed using orthogonal arrangement, circular arrangement or arranged in parallel, increase adsorbent bed transverse strength and
Longitudinal strength, while large specific surface area, the pressure loss are less than 2.0kPa.Adsorbent bed adsorbent is using zeolite molecular sieve, charcoal molecule
The porous moleculars sieve adsorbants such as sieve, adsorption capacity is big, and adsorptive selectivity is high.Whole device is in 0.8~1.2m/s of gas flow rate
It can realize that efficient adsorption/desorption, cocnentration factor are up to 1 to the VOCs exhaust gas of Wind Volume, low concentration down:(10~50).
(4) it realizes that continuous operation is fed back and automated to the information of whole system by PLC control system, can effectively remember
Record and the operation data for preserving whole equipment.
Description of the drawings
Fig. 1 is the dimensional structure diagram of apparatus of the present invention.
Fig. 2 is the overlooking structure diagram of apparatus of the present invention.
Fig. 3 is the dimensional structure diagram of apparatus of the present invention absorption bed unit.
Fig. 4 is the indoor pipeline configuration schematic diagram of apparatus of the present invention air inlet.
Fig. 5 is apparatus of the present invention rotary valve structure schematic diagram.
Fig. 6 is the indoor pipeline configuration schematic diagram of air inlet (0 aperture of rotary valve) under apparatus of the present invention absorption and the state of cooling.
Fig. 7 is the indoor pipeline configuration schematic diagram of air inlet (1 aperture of rotary valve) under apparatus of the present invention detachment status.
Fig. 8 is each rotary valve status diagram of inlet end.
Fig. 9 is each rotary valve status diagram in outlet side.
Figure 10-12 is the filling schematic diagram for adsorbing bed unit.
In figure：1, hot-air duct；2, air inlet gas chamber；3, bed unit is adsorbed；4, discharge plenum；5, feed channel is desorbed；6、
Gaseous diffuser；7, gas gathering mask；8, exhaust passage；9, inlet channel；9A, positive ventilation mouth；9B, lateral blow vent；10, two
Threeway plate valve；10A, valve hinges；10B, valve plate；10C, valve sealing ring；11, hot air inlet；12, exhaust inlet pipe
Road；13, feed channel is purified；14, desorption gas outlet；15, insulated lining.
Specific implementation mode
The principle of the cellular VOCs adsorption/desorptions device of fixed-bed type in the present invention, be adsorbent bed module is divided into it is several
A absorption bed unit, controls the aperture of encapsulated rotary valve on different pipelines by PLC control unit, realize to adsorption and desorption into
The control of gas and outlet, constitute continuous adsorption and desorption, cooling device.Connect since the sorbing material of each absorption bed unit is in
Continuous more new state, both improves adsorption efficiency, also saves the energy consumption of runner driving motor.Each absorption bed unit rule in device
Lattice are unified, it can be achieved that standardized production, dismounting, regeneration are convenient.Low concentration VOCs exhaust gas is adsorbed by device, and tail gas is up to standard
Discharge.Hot air method can be used in desorption or vapor method is realized, the exhaust gas by concentration enters heat accumulating type catalytic combustion system
System, heat accumulating type heating power combustion system or direct flame combustion system carry out advanced treating.
VOCs of the present invention is typically derived from the life that refinery, chemical industry, printing, application, synthetic leather etc. are related to organic solvent
Low concentration Wind Volume organic exhaust gas caused by the industry of production, 20000~200000m of organic exhaust gas air quantity3/ h, pollutant it is dense
Spend 200~1500mg/m3.Device of the present invention is 1 to the cocnentration factor of contained VOCs in gas:(10~50).
The cellular VOCs adsorption/desorptions device of fixed-bed type in the present invention, including internal heap are filled with the absorption of sorbing material
Bed unit 3；The absorption bed unit 3 has multiple and is installed in parallel, and constitutes adsorbent bed module；Adsorbing bed unit 3 has outer framework,
Its inner wall sets insulated lining 15；The inlet end of each absorption bed unit 3 is separately connected respective inlet channel 9, and exhaust end then divides
Respective exhaust passage 8 is not connected；
The inlet channel 9 is connected to hot-air duct 1 and gas inlet pipeline 12 to realize air inlet through air inlet triple valve
Switching, exhaust passage 8 are connected to purification feed channel 13 and desorption feed channel 5 to realize exhaust switching through exhaust three-way valve；It is described
It purifies feed channel 13 and is equipped with gas concentration detection apparatus, and PLC control unit is connected to by signal wire；PLC control unit is logical
It crosses signal wire to connect with each triple valve, controls the switching action of each triple valve respectively.
Heating device is set on hot-air duct 1, is equipped with temperature sensor in inlet channel 9, hot-air duct 1 is by automatically controlled
Valve connects with cold air duct is mended, and heating device, temperature sensor and electric control valve are connected to PLC control unit by signal wire.
A specific embodiment as the present invention is as shown in Fig. 1 to 12.
Adsorbent bed module is closed rectangular parallelepiped structure；Its both ends is respectively air inlet gas chamber 2 and discharge plenum 4, and middle part is
The absorption bed unit 3 arranged, be installed in parallel in collection pencil；
The inlet channel 9 of each absorption bed unit 3 both passes through air inlet gas chamber 2, and on the outside of adsorbent bed module and warm-air pipe
Road 1 connects；The air inlet triple valve is set on the indoor inlet channel of air inlet gas 9, and gas inlet pipeline 12 is then connected to air inlet gas
On the side wall of room 2；
The exhaust passage 8 of each absorption bed unit 3 both passes through discharge plenum 4, and on the outside of adsorbent bed module with desorption tracheae
Road 5 connects；The exhaust three-way valve is set on the exhaust passage 8 in discharge plenum 4, and purification feed channel 13 is then connected to discharge plenum
On 4 side wall.
It is equipped with gas gathering mask 6 between the inlet end and inlet channel 9 of absorption bed unit 3, is set between exhaust end and exhaust passage 8
There is gaseous diffuser 7.
In the present embodiment, the section of inlet channel and exhaust passage is rectangle, as shown in Figure 4.The wherein section in channel
The ratio of size dimension and passage length is a:B=1:(1~6).Air inlet triple valve and exhaust three-way valve are two-position three way plate
Formula valve, as shown in Figure 5.It is of course also possible to select other that can meet the adaptation valve version of corresponding function demand.Valve plate 10B tools
There is the shape to match with inlet channel and exhaust passage, is rectangle.The angle that valve plate 10B is pivoted is 90 °, on valve plate
Equipped with valve sealing ring 10C.Triple valve is controlled by PLC control unit, sets delay procedure and feedback mechanism, and switch speed is fast,
The leakage of gas in handoff procedure can be reduced.
As an example, the length of adsorbent bed module is 300~1500mm, and sectional area is 0.5~1.5m2.It can divide
At the identical absorption bed unit 3 of 4~12 specifications, arrangement mode is the forms such as 2 × 2,2 × 3,3 × 3,4 × 3.Adsorb bed unit
3 outer frameworks with high-performance composite polymer material facilitate the installation and replacement of each absorption bed unit 3.Each adsorbent bed
3 inner wall of unit is equipped with insulated lining 15.Insulated lining 15 is using sheathing paper, glass fibre guard glass fibre cotton, alumina silicate fibre or centrifugation glass
Glass cellucotton/rock wool one.The thickness of heat-barrier material be 5~25mm, for prevent absorption bed unit 3 between it is channeling, keep temperature
Stablize.
Absorption 3 inside heap of bed unit is filled with sorbing material, and the flow velocity that gas passes through adsorbent bed is 0.8~1.2m/s, pressure
Loss is less than 2.0kPa.
Sorbing material includes carrier and adsorbent.Wherein, carrier is ceramic honeycomb fibrous paper.Ceramic honeycomb fibrous paper
Using the preparation process of corrugated paper, stupefied high and stupefied width ratio H:L is 1:(0.5~2), the preparation work of a whole set of ceramic honeycomb fibrous paper
Skill is ripe, realizes flow line production.The filling mode of carrier uses orthogonal arrangement (Figure 10), circular arrangement (Figure 11) or parallel
One of the mode of (Figure 12) is arranged, the transverse strength of carrier is not less than 0.5MPa, and longitudinal strength is not less than 1.0MPa.Adsorbent is boiling
The dynamic adsorbance of stone molecular sieve or carbon molecular sieve equimolecular sieve adsorbant, adsorbent is more than 10%, and adsorbent uses infusion process
Or suction pump cladding process is supported on absorption carrier.
The method for realizing VOCs adsorption/desorptions using aforementioned device, specifically includes：
(1) exhaust gas adsorption treatment
PLC control unit controls the open state of some absorption bed unit 3 corresponding air inlet triple valve and exhaust three-way valve,
The pending exhaust gas containing VOCs is set to introduce inlet channel 9 from gas inlet pipeline 12, by adsorbing bed unit 3 and discharge duct
It is discharged from purification feed channel 13 after 8, realizes qualified discharge；
Fig. 8 is each rotary valve status diagram of inlet end, indicates that air inlet triple valve 22 is open state, air inlet triple valve
21,23-26 is in off state.Fig. 9 is each rotary valve status diagram in outlet side.Indicate that exhaust three-way valve 41,42 is to open
State, air inlet triple valve 43-46 are in off state.
(2) desorption of bed unit is adsorbed
Gas concentration detection apparatus on-line analysis purifies the VOCs concentration in feed channel 13, and is transmitted to PLC control unit
Signal；When concentration exceeds preset value, PLC control unit controls the open state of air inlet triple valve and exhaust three-way valve, makes this
Absorption bed unit 3 is switched to be connected to hot-air duct 1 and desorption feed channel 5, to import hot-air or hot steam to adsorption material
Material is desorbed；Pneumatic transmission is desorbed to follow up device (heat accumulating type catalytic combustion system, heat accumulating type heating power combustion system or direct heating power
Combustion system) carry out advanced treating；
In desorption process, when the temperature of hot-air or hot steam for desorption is higher than setting value, PLC control unit is opened
It opens electric control valve and connects benefit cold air duct, cool down to hot-air or hot steam；When the temperature of hot-air or hot steam is less than
When setting value, PLC control unit opens the heating device on hot-air duct 1, is heated to hot-air or hot steam；
(3) cooling after being desorbed
The pending exhaust gas containing VOCs is directly introduced into inlet channel 9, PLC control unit control from gas inlet pipeline 12
The open state of air inlet triple valve and exhaust three-way valve processed, make pending exhaust gas by absorption bed unit 3 and discharge duct 8 after from
Feed channel 5 is desorbed to be discharged, send to follow up device and carries out advanced treating, is completed at the same time the cooling to adsorbing bed unit 3 after desorption；
(4) continuous to run in turn
Required absorption bed unit 3 in adsorbent bed module is determined according to the average single run time of absorption bed unit 3
Quantity, and set in PLC control unit sequence and time that each absorption bed unit 3 puts into operation successively, make adsorbent bed mould
It is in the block to adsorb the alternation state in adsorption and desorption, cooling successively of bed unit 3；Meanwhile according to whole loads of exhaust-gas treatment
The quantity of adsorbent bed module is determined, to ensure to inhale the continuous operation of each attached bed module.
Concrete application embodiment is provided below, and the present invention is described in more detail, which part design parameter only as
The explanation of typical case, is not limited to the present invention.
Embodiment 1：Certain chemical plant organic exhaust gas adsorption desorption purification
The factory produces medicine intermediate, and the gas washing before exhaust and charging when tail gas is reaction kettle discharging shares 18 instead
Kettle different periods interval is answered to be vented, average exhaust gas amount about 5000m3/ h, wherein toluene concentration 166mg/m3, tetrahydrofuran (THF) is dense
Degree is 2316mg/m3, remaining is air, N2(gas washing N2) and micro vinyl chloride, delivery temperature be room temperature.
Equipment and technological process in the present embodiment is as follows：
Device simultaneously purifies the exhaust gas in this workshop using four absorption bed units 3, and the design parameter of device is：
The ratio of the section size dimension and passage length of inlet channel 9 and exhaust passage 8 is a:B=1:6, absorption bed unit 3 be 2 ×
2 spread pattern, it is 400mm, 15 thickness of insulated lining that landfill form, which uses orthogonal arrangement (Figure 10), absorption 3 length of bed unit,
5mm, absorption carrier are ceramic honeycomb fibrous paper, and adsorbent is carbon molecular sieve.According to clockwise direction to adsorbing bed unit 3 one by one
Desorption cooling, each desorption time for adsorbing bed unit 3 are 100s.The exhaust gas passes through the cellular VOCs adsorption/desorptions of fixed-bed type
Device processing, purifying rate can reach 98%, and cocnentration factor reaches 1:20.
Embodiment 2：Certain synthetic leather factory organic exhaust gas adsorption desorption purification
There are 10 production lines in certain synthetic leather factory, produces 3000 myriametre PU synthetic leather per year, wherein one is produced per year 300 myriametre PU synthesis
Leather production line generates 100000 cubic metres of exhaust gas per hour, the DMF containing low concentration, toluene, methyl esters and butanone etc. in exhaust gas
Organic matter, major concentration parameter see the table below.
Certain the synthetic leather factory waste gas component of table 1
Unit：mg/m3
| Exhaust gas index | DMF | Non-methane total hydrocarbons | TVOC |
| Concentration | 70-90 | 10-20 | 5-10 |
Equipment and technological process in the present embodiment is as follows：
Device simultaneously purifies the exhaust gas of this production line using six absorption bed units 3, the design parameter of device
For：The ratio of the section size dimension and passage length of inlet channel 9 and exhaust passage 8 is a:B=1:3, adsorbing bed unit 3 is
2 × 3 spread pattern, it is 500mm that landfill form, which uses circular arrangement (Figure 11), absorption 3 length of bed unit, and insulated lining 15 is thick
10mm is spent, absorption carrier is ceramic honeycomb fibrous paper, and adsorbent sieves for hydrophobic molecule.According to clockwise direction to adsorbing bed unit
3 desorption coolings one by one, each desorption time for adsorbing bed unit 3 are 120s.The exhaust gas is inhaled by the cellular VOCs of fixed-bed type
Attached desorption apparatus processing, purifying rate can reach 95%, and cocnentration factor reaches 1:30.
Embodiment 3：Certain spraying factory organic exhaust gas adsorption desorption purification
Certain spraying factory owner will be engaged in the various paint spraying work such as automobile coating, industrial paint, sign paint, F-C paint, workshop production
Raw exhausted air quantity about 200000m3/ h, the principal polluter in exhaust gas see the table below.
Certain the spraying factory organic exhaust gas component of table 2
Unit：mg/m3
| Exhaust gas index | Benzene | Toluene | Dimethylbenzene |
| Concentration | 60 | 110 | 180 |
Equipment and technological process in the present embodiment is as follows：
Device simultaneously purifies the exhaust gas in workshop using 12 absorption bed units 3, and the design parameter of device is：Into
The ratio of the section size dimension and passage length of gas channel 9 and exhaust passage 8 is a:B=1:1, absorption bed unit 3 is 3 × 4
Spread pattern, landfill form use (Figure 12) arranged in parallel, absorption 3 length of bed unit be 1000mm, 15 thickness of insulated lining
15mm, absorption carrier are ceramic honeycomb fibrous paper, and adsorbent is molecular sieve.
The method of operation reference implementation example 1 and embodiment 2 of device have eight absorption bed units in entire adsorption/desorption system
3 are adsorbed, and two absorption bed units 3 are desorbed, and an absorption bed unit 3 is cooled down.The exhaust gas passes through fixed-bed type
Cellular VOCs adsorption/desorptions device processing, purifying rate can reach 93%, and cocnentration factor reaches 1:45.
Claims (8)
1. a kind of cellular VOCs adsorption/desorptions device of fixed-bed type, including internal heap are filled with the absorption bed unit of sorbing material；
It is characterized in that, the absorption bed unit has multiple and is installed in parallel, adsorbent bed module is constituted；Adsorbing bed unit has outline border
Frame, inner wall set insulated lining；The inlet end of each absorption bed unit is separately connected respective inlet channel, and exhaust end is then distinguished
Connect respective exhaust passage；
The inlet channel is connected to hot-air duct and gas inlet pipeline to realize that air inlet switches through air inlet triple valve, is vented
Channel is connected to purification feed channel and desorption feed channel to realize exhaust switching through exhaust three-way valve；It is set in the purification feed channel
There is gas concentration detection apparatus, and PLC control unit is connected to by signal wire；PLC control unit passes through signal wire and each threeway
Valve connects, and controls the switching action of each triple valve respectively；
The adsorbent bed module is closed rectangular parallelepiped structure；Its both ends is respectively air inlet gas chamber and discharge plenum, middle part be in
The absorption bed unit that collection pencil is installed in parallel；
The inlet channel of each absorption bed unit both passes through air inlet gas chamber, and is connect with hot-air duct on the outside of adsorbent bed module；
The air inlet triple valve is set on the indoor inlet channel of air inlet gas, and gas inlet pipeline is then connected on the side wall of air inlet gas chamber；
The exhaust passage of each absorption bed unit both passes through discharge plenum, and is connect with desorption feed channel on the outside of adsorbent bed module；
The exhaust three-way valve is set on the exhaust passage in discharge plenum, and purification feed channel is then connected on the side wall of discharge plenum.
2. the apparatus according to claim 1, which is characterized in that the air inlet triple valve and exhaust three-way valve are two three
Logical plate valve, the angle that valve plate is pivoted are 90 °, and valve plate is equipped with sealing ring.
3. the apparatus of claim 2, which is characterized in that the section of the inlet channel and exhaust passage is in rectangular
The valve plate of shape, the air inlet triple valve and exhaust three-way valve has matched shape.
4. according to the device described in claims 1 to 3 any one, which is characterized in that set heating on the hot-air duct
Device, inlet channel is interior to be equipped with temperature sensor, and hot-air duct is connected by electric control valve with cold air duct is mended, heating dress
It sets, temperature sensor and electric control valve are connected to PLC control unit by signal wire.
5. according to the device described in claims 1 to 3 any one, which is characterized in that the inlet end of the absorption bed unit
It is equipped with gas gathering mask between inlet channel, gaseous diffuser is equipped between exhaust end and exhaust passage.
6. the method for realizing VOCs adsorption/desorptions using device described in 3 any one of claims 1 to 3, which is characterized in that tool
Body includes：
(1) exhaust gas adsorption treatment
PLC control unit controls the open state of some absorption bed unit corresponding air inlet triple valve and exhaust three-way valve, makes to contain
There is the pending exhaust gas of VOCs to be introduced into gas channel from gas inlet pipeline, from purification after absorption bed unit and discharge duct
Feed channel is discharged；
(2) desorption of bed unit is adsorbed
Gas concentration detection apparatus on-line analysis purifies the VOCs concentration in feed channel, and transmits signal to PLC control unit；When
When concentration exceeds preset value, PLC control unit controls the open state of air inlet triple valve and exhaust three-way valve, makes the absorption sheet
Member is switched to be connected to hot-air duct and desorption feed channel, and sorbing material is desorbed with importing hot-air or hot steam；
Pneumatic transmission to follow up device is desorbed and carries out advanced treating；
In desorption process, when the temperature of hot-air or hot steam for desorption is higher than setting value, PLC control unit opens electricity
It controls valve and connects benefit cold air duct, cool down to hot-air or hot steam；When the temperature of hot-air or hot steam is less than setting
When value, PLC control unit opens the heating device on hot-air duct, is heated to hot-air or hot steam；
(3) cooling after being desorbed
The pending exhaust gas containing VOCs is directly introduced into gas channel from gas inlet pipeline, PLC control unit controls air inlet
The open state of triple valve and exhaust three-way valve makes pending exhaust gas after absorption bed unit and discharge duct from desorption tracheae
Road is discharged, and send to follow up device and carries out advanced treating, is completed at the same time the cooling to adsorbing bed unit after desorption；
(4) continuous to run in turn
Required adsorbent bed element number in adsorbent bed module is determined according to the average single run time of absorption bed unit, and
The sequence and time that each absorption bed unit puts into operation successively are set in PLC control unit, make the absorption in the block of adsorbent bed mould
Bed unit successively be in adsorption and desorption, cooling alternation state；Meanwhile determining absorption according to whole loads of exhaust-gas treatment
The quantity of bed module, to ensure to inhale the continuous operation of each attached bed module.
7. according to the method described in claim 6, it is characterized in that, the air quantity of the pending exhaust gas is 2000~200000m3/
H, a concentration of 200~1500mg/m of VOCs in pending exhaust gas3；It is 1 to the cocnentration factor of VOCs to adsorb bed unit:(10~
50), gas is 0.8~1.2m/s by adsorbing the flow velocity of bed unit, and the pressure loss is less than 2.0kPa.
8. according to the method described in claim 6, it is characterized in that, sorbing material used in absorption bed unit includes carrier and absorption
Agent；The carrier is ceramic honeycomb fibrous paper, is made using corrugated paper preparation process, and stupefied high and stupefied width is than H: L 1: (0.5
~2)；The filling mode of carrier using orthogonal arrangement, circular arrangement or it is arranged in parallel by the way of；The adsorbent is zeolite molecules
Sieve or carbon molecular sieve；Adsorbent is supported on by infusion process or suction pump cladding process on absorption carrier.
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| CN106731473A (en) * | 2017-03-16 | 2017-05-31 | 上海兰宝环保科技有限公司 | Industrial organic waste-gas purification device |
| CN108187448B (en) * | 2018-02-27 | 2023-12-15 | 江苏安琪尔废气净化有限公司 | High-concentration-ratio high-temperature-resistant light organic waste gas concentration device and method |
| CN108310971A (en) * | 2018-03-14 | 2018-07-24 | 张荷友 | A kind of flue-gas purification equipment of more cartridge combinations |
| CN110090528A (en) * | 2019-06-04 | 2019-08-06 | 江苏大信环境科技有限公司 | De- recyclable device is inhaled in rotation |
| CN110605001A (en) * | 2019-09-19 | 2019-12-24 | 北京梦幻三星涂装设备技术开发公司 | Exhaust gas treatment equipment |
| CN111013324A (en) * | 2019-12-30 | 2020-04-17 | 苏州艾特斯环保设备有限公司 | Concentration method of organic waste gas |
| CN112370934B (en) * | 2020-10-28 | 2022-09-27 | 江苏安琪尔废气净化有限公司 | Organic waste gas activated carbon concentration coupling RTO mineralization system and process |
| CN115011388A (en) * | 2022-05-26 | 2022-09-06 | 北京中源博智节能科技有限公司 | Ventilation gas concentration and enrichment method |
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