CN105709562A - Continuous purification treatment system for paint spraying waste gas and purification method adopting continuous purification treatment system - Google Patents
Continuous purification treatment system for paint spraying waste gas and purification method adopting continuous purification treatment system Download PDFInfo
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- CN105709562A CN105709562A CN201610213052.6A CN201610213052A CN105709562A CN 105709562 A CN105709562 A CN 105709562A CN 201610213052 A CN201610213052 A CN 201610213052A CN 105709562 A CN105709562 A CN 105709562A
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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
- 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
- B01D53/005—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 heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
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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
- B01D2259/40003—Methods relating to valve switching
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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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Abstract
The invention discloses a continuous purification treatment system for paint spraying waste gas and a purification method adopting the continuous purification treatment system. The system comprises a first adsorption zone, a second adsorption zone, a preheating zone and a thermal decomposition zone, wherein waste gas inlets of the first adsorption zone and the second adsorption zone are used for collecting the paint spraying waste gas; waste gas exhaust ports of the first adsorption zone and the second adsorption zone are used for discharging waste gas subjected to adsorption treatment through discharging pipelines; desorption hot air inlets of the first adsorption zone and the second adsorption zone are connected onto an outlet of the preheating zone; hot air outlets of the first adsorption zone and the second adsorption zone are connected to a first heat recovery zone; an outlet of the first heat recovery zone is connected with the thermal decomposition zone; an outlet of the thermal decomposition zone is used for recovering heat of the gas subjected to thermal decomposition through the first heat recovery zone and discharging the gas. The system and the method have the remarkable effects as follows: requirements for operation and maintenance are lower; the investment and the operating cost are low; the adsorption process can be performed continuously; the treatment efficiency of the paint spraying waste gas is high.
Description
Technical field
The present invention relates to atmospheric environment protection technical field, specifically, be that a kind of lacquer spraying waste gas purifies continuous processing system and purification method thereof.
Background technology
Along with the raising year by year of environmental requirement and Environmental Inputs, the improvement of atmosphere quality is inconspicuous, and haze frequency in various places is existing.After SO2, NOx and dust etc. become control object, volatile organic matter (VOCs) has also been included into atmosphere pollution and has controlled category.
In prior art, VOCs treatment technology mainly has activated carbon adsorption, condensation recovery, Adsorption Concentration+oxidizing fire (heat-accumulation combustion RTO, heat reclamation type heating power burn TNV or heat accumulating type catalysis RCO), low-temperature plasma, photocatalysis and bioanalysis etc., and wherein Adsorption Concentration+oxidizing fire is the common technology processing Wind Volume, low concentration VOCs.
One of feature of lacquer spraying waste gas is exactly Wind Volume and low concentration VOCs.And common technology has following defects that and Adsorption Concentration+oxidative combustion processes lacquer spraying waste gas to there is problems of the requirement to operation and maintenance higher, investment and operation and maintenance cost are high；Heat-accumulation combustion RTO and heat reclamation type heating power burn TNV method it is generally required to use combustion gas, Combustion System is required height, also can produce secondary pollution；Heat accumulating type catalysis RCO method needs to use expensive and easy in inactivation catalyst, finally also wants the catalyst that harmless treatment inactivates, it is to avoid secondary pollution.These factors have impact on the popularization of lacquer spraying waste gas VOCs Treatment process.
Accordingly, it would be desirable to develop the investment for lacquer spraying waste gas and operating cost is low, VOCs purification techniques easy and simple to handle, it is possible to continuously perform lacquer spraying waste gas purified treatment, reduce the economical and environmentally friendly pressure of industrial undertaking.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of lacquer spraying waste gas and purify continuous processing system and purification method thereof, by subregion desorbing and electrical heating isolation, easy and simple to handle, disclosure satisfy that and produce needs continuously, investment and operating cost can be greatly reduced, effectively alleviate industrial undertaking's economical and environmentally friendly pressure；Two adsorption zone rotation work are set, it may be achieved adsorption process continuously performs.
For reaching above-mentioned purpose, the technical solution used in the present invention is as follows:
A kind of lacquer spraying waste gas purifies continuous processing system, it it is critical only that: includes the first adsorption zone, second adsorption zone, preheating zone and pyrolysis zone, the exhaust gas inlet of described first adsorption zone and the second adsorption zone is used for collecting lacquer spraying waste gas, the Waste gas outlet of described first adsorption zone and described second adsorption zone discharges the waste gas after adsorption treatment each through discharge tube, the heat of desorption air intlet of described first adsorption zone and the second adsorption zone is both connected in the outlet of described preheating zone, the hot air outlet of described first adsorption zone and the second adsorption zone is connected to the first heat recovery, the outlet of this first heat recovery is connected with described pyrolysis zone, the outlet of described pyrolysis zone is also discharged after the gas after thermal decomposition is carried out heat recovery by described first heat recovery again.
Native system is in running, and described first adsorption zone carries out adsorption process and desorption process time different from the second adsorption zone.When carrying out lacquer spraying waste gas and processing, lacquer spraying waste gas enters one of them adsorption zone of system after collection, pretreatment by collecting pipe, and the waste gas being adsorbed purifying afterwards passes through discharge tube and directly discharges；Adsorbed VOCs desorbing is got off by the hot-air entrance adsorption zone being preheating to uniform temperature by preheating zone, and it is flowed into pyrolysis zone with hot-air, by pyrolysis zone is heated to uniform temperature, VOCs is pyrolyzed as CO2, water etc., is then passed through entering in air after the first heat recovery carries out heat recovery；Another adsorption zone is finally utilized to repeat said process.Native system passes through thermal decomposition manner, it is possible to effectively lacquer spraying waste gas is carried out purified treatment, compared to traditional lacquer spraying waste gas treating method, the requirement of operation and maintenance is relatively low, and investment and operation and maintenance cost are few；Combustion gas will not be used, Combustion System is required low, it is thus also avoided that produce secondary pollution；And two adsorption zones can be carried out rotation work, namely an adsorption zone carries out adsorption process another carries out desorption process, thus the adsorption process realizing native system can continuously perform, and then improves the treatment effeciency of lacquer spraying waste gas.
Further, the floss hole in described first heat recovery is also associated with the second heat recovery, and the air sending into described preheating zone, for the first heat recovery expellant gas is carried out heat recovery again, is preheated by this second heat recovery.
Can reclaim, by above-mentioned second heat recovery, the heat that thermal decomposition produces more fully, it is achieved energy-conservation and reduction operating cost, avoid thermal pollution simultaneously.
Further, it is respectively arranged with the first valve, the second valve, the 3rd valve and the 4th valve at the exhaust gas inlet of described first adsorption zone, Waste gas outlet, heat of desorption air intlet and hot air outlet, is respectively arranged with the 5th valve, the 6th valve, the 7th valve and the 8th valve at the exhaust gas inlet of described second adsorption zone, Waste gas outlet, heat of desorption air intlet and hot air outlet.
By each valve above-mentioned, it is possible not only to realize flexibly the control of regional duty, but also as required two adsorption zones can be carried out rotation work, namely an adsorption zone carries out adsorption process another carries out desorption process, thus the adsorption process realizing native system can continuously perform, and then improve the treatment effeciency of lacquer spraying waste gas.
Further, the adsorbate that described first adsorption zone and the second adsorption zone adopt can be at least one in granular active carbon, particulate molecular sieve, NACF, Alveolate activated carbon, cellular molecular sieve.
Purify the structure of continuous processing system based on above-mentioned lacquer spraying waste gas, this programme also proposed the purification method of this system, specifically carries out according to following steps:
Step 1, adsorption cleaning:
Close the 5th valve corresponding to the second adsorption zone and the 6th valve, open the first valve on the first adsorption zone and the second valve, close the 3rd valve between the first adsorption zone and preheating zone and the 4th valve；Lacquer spraying waste gas enters the first adsorption zone of cleaning system after collection, pretreatment, and the adsorbed waste gas purified directly is discharged by discharge tube afterwards；
After the first adsorption zone absorption is saturated, starting working in second adsorption zone: closes the first valve on the first adsorption zone and the second valve, close the 7th valve and the 8th valve, open the 5th valve and the 6th valve, lacquer spraying waste gas enters the second adsorption zone of cleaning system after collection, pretreatment, and the adsorbed waste gas purified directly is discharged by discharge tube afterwards；
Step 2, desorbing processes:
After the first adsorption zone absorption is saturated, the first adsorption zone starts desorbing: close the first valve and the second valve, opens the 3rd valve and the 4th valve；Preheated district is preheating to the hot-air of uniform temperature and enters the first adsorption zone and adsorbed VOCs desorbing got off, and flows into pyrolysis zone with hot-air；
After the first adsorption zone desorbing completes, the second adsorption zone can start desorption process: closes the 5th valve and the 6th valve, opens the 7th valve and the 8th valve；Preheated district is preheating to the hot-air of uniform temperature and enters the second adsorption zone and adsorbed VOCs desorbing got off, and flows into pyrolysis zone with hot-air；
Step 3, heat resolve:
Described first adsorption zone or the second adsorption zone are desorbed the VOCs got off and enter the first heat recovery with hot-air and be heated, it is then fed into pyrolysis zone and VOCs is pyrolyzed into CO2, water etc., and the hot-air after thermal decomposition is sequentially sent to described first heat recovery and the second heat recovery；
Step 4, heat recovery:
Hot-air after thermal decomposition carries out heat recovery in the first heat recovery, and for heating containing the hot-air being desorbed VOCs, the hot-air of described first heat recovery output sends into preheating zone after carrying out heat recovery in the second heat recovery and being heated by the air being used for desorbing；
Step 5, returns step 1 circulation and carries out.
Further, desorbing described in step 2 processes and adopts subregion desorption mode.
Adopt subregion desorption mode, greatly reduce gas desorption quantity and the required energy of thermal decomposition, significantly reduce cost of investment and operating cost that lacquer spraying waste gas purifies.Concrete mode is: adsorption zone is divided into multiple decile, each subregion desorption time a period of time, each subregion desorbing certain time, after the desorbing once successively of each subregion, again according to needing to repeat desorbing successively, desorbing number of times and desorption time can be manually set as required.
Further, pyrolysis zone described in step 3 and the first heat recovery adopt Electric heating to ensure the temperature needed for thermal decomposition process.
Adopting electrical heating, burn TNV method compared to traditional Adsorption Concentration+oxidative combustion and heat-accumulation combustion RTO and heat reclamation type heating power, the requirement of operation and maintenance is relatively low, and investment and operation and maintenance cost are few；Combustion gas will not be used, Combustion System is required low, it is thus also avoided that produce secondary pollution.
Further, the preheating temperature of described preheating zone air is 50 DEG C～200 DEG C, the decomposition temperature of described pyrolysis zone is 600 DEG C～1000 DEG C, and the temperature of described first heat recovery delivery air is lower than 200 DEG C, and the temperature of described second heat recovery discharge air is lower than 60 DEG C.
The present invention has the advantages that: simple in construction, easy and simple to handle, adopts subregion desorbing and electrical heating isolation, it is possible to effectively lacquer spraying waste gas is carried out purified treatment, compared to traditional lacquer spraying waste gas processing method, the requirement of operation and maintenance is relatively low；By two heat recovery, gas heat is carried out recycling, significantly reduce investment and operating cost；Combustion gas will not be used, Combustion System is required low, it is thus also avoided that produce secondary pollution, effectively alleviate industrial undertaking's economical and environmentally friendly pressure；And two adsorption zones can be carried out rotation work, occupation mode is flexible, thus the adsorption process realizing native system can continuously perform, and then improves the treatment effeciency of lacquer spraying waste gas.
Accompanying drawing explanation
Fig. 1 is the pipeline structure schematic diagram of the present invention；
Fig. 2 is described subregion desorbing schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention and operation principle are described in further detail.
As shown in Figure 1, a kind of lacquer spraying waste gas purifies continuous processing system, including the first adsorption zone 1, second adsorption zone 2, preheating zone 3 and pyrolysis zone 4, the exhaust gas inlet of described first adsorption zone 1 and the second adsorption zone 2 is used for collecting lacquer spraying waste gas, the Waste gas outlet of described first adsorption zone 1 and described second adsorption zone 2 discharges the waste gas after adsorption treatment each through discharge tube, the heat of desorption air intlet of described first adsorption zone 1 and the second adsorption zone 2 is both connected in the outlet of described preheating zone 3, the hot air outlet of described first adsorption zone 1 and the second adsorption zone 2 is connected to the first heat recovery 5, the outlet of this first heat recovery 5 is connected with described pyrolysis zone 4, the outlet of described pyrolysis zone 4 is also discharged after the gas after thermal decomposition is carried out heat recovery by described first heat recovery 5 again.
Referring to accompanying drawing 1, floss hole in described first heat recovery 5 is also associated with the second heat recovery 6, this second heat recovery 6, for the first heat recovery 5 expellant gas is carried out heat recovery, is additionally operable to the air to sending into described preheating zone 3 and preheats.
It can also be seen that from Fig. 1, it is respectively arranged with the first valve the 7, second valve the 8, the 3rd valve 9 and the 4th valve 10 at the exhaust gas inlet of described first adsorption zone 1, Waste gas outlet, heat of desorption air intlet and hot air outlet, is respectively arranged with the 5th valve the 11, the 6th valve the 12, the 7th valve 13 and the 8th valve 14 at the exhaust gas inlet of described second adsorption zone 2, Waste gas outlet, heat of desorption air intlet and hot air outlet.
When implementing, the adsorbate that described first adsorption zone 1 and the second adsorption zone 2 adopt can be at least one in granular active carbon, particulate molecular sieve, NACF, Alveolate activated carbon, cellular molecular sieve.In this example, the adsorbate that described first adsorption zone 1 and the second adsorption zone 2 adopt is honeycomb molecular sieve, then corresponding, preheating zone 3 outlet air temperature<200 DEG C, pyrolysis zone 4 hot air temperature<1000 DEG C, first heat recovery 5 outlet air temperature>200 DEG C, the second heat recovery 6 outlet drain air themperature<60 DEG C.
Purify the pipeline structure of continuous processing system in conjunction with above-mentioned lacquer spraying waste gas, the present embodiment also proposed a kind of purification method based on this system, carries out according to following steps:
Step 1, adsorption cleaning:
Close the 5th valve 11 and the 6th valve 12 of the second adsorption zone 2 correspondence, open the first valve 7 and the second valve 8 on the first adsorption zone 1, and close the 3rd valve 9 and the 4th valve 10；Lacquer spraying waste gas enters the first adsorption zone 1 of cleaning system after collection, pretreatment, and the adsorbed waste gas purified directly is discharged by discharge tube afterwards；
When the first adsorption zone 1 adsorb saturated after, starting working in second adsorption zone 2: closes the first valve 7 and the second valve 8 on the first adsorption zone 1, open the 5th valve 11 and the 6th valve 12, close the 7th valve 13 and the 8th valve 14, lacquer spraying waste gas enters the second adsorption zone 2 of cleaning system after collection, pretreatment, and the adsorbed waste gas purified directly is discharged by discharge tube afterwards；
Step 2, desorbing processes:
When the first adsorption zone 1 adsorb saturated after, the first adsorption zone 1 starts desorbing: close the first valve 7 and the second valve 8, opens the 3rd valve 9 and the 4th valve 10；The hot-air that preheated district 3 is preheating to uniform temperature enters the first adsorption zone 1 and adsorbed VOCs desorbing is got off, and flows into pyrolysis zone 4 with hot-air；
After the first adsorption zone 1 desorbing completes, the second adsorption zone 2 can start desorption process: closes the 5th valve 11 and the 6th valve 12, opens the 7th valve 13 and the 8th valve 14；The hot-air that preheated district 3 is preheating to uniform temperature enters the second adsorption zone 2 and adsorbed VOCs desorbing is got off, and flows into pyrolysis zone 4 with hot-air；
In this example, described desorbing processes and adopts subregion desorption mode.Described first adsorption zone 1 and the second adsorption zone 2 all adopt subregion desorbing, 5～11 deciles can be divided equally in each adsorption zone when implementing, hot air outlet size after preheating is consistent with each partitions sizes, each subregion desorption time about 5 minutes, after the desorbing once successively of each subregion, then repeat desorbing successively according to needs.
Step 3, heat resolve:
Described first adsorption zone 1 or the second adsorption zone 2 are desorbed the VOCs got off and enter the first heat recovery 5 with hot-air and be heated, it is then fed into pyrolysis zone 4 and VOCs is pyrolyzed into CO2, water etc., and the hot-air after thermal decomposition is sequentially sent to described first heat recovery 5 and the second heat recovery 6；
For easy to control, minimizing secondary pollution, as preferably, pyrolysis zone 4 described in step 3 and the first heat recovery 5 adopt Electric heating to ensure the temperature needed for thermal decomposition process.
In specific implementation process, if the temperature of air from the second heat recovery 6 out is not up to temperature required for the first adsorption zone 1 or the second adsorption zone 2 desorbing, the auto-power on heating in preheating zone 3 is to temperature required；If the hot air temperature containing VOCs from the first heat recovery 5 out fails to reach the temperature required for thermal decomposition, the auto-power on heating in electrical heating district can be set in pyrolysis zone 4 to temperature required.
Step 4, heat recovery:
Hot-air after thermal decomposition carries out heat recovery in the first heat recovery 5, and for heating containing the hot-air being desorbed VOCs, the hot-air of described first heat recovery 5 output carries out heat recovery in the second heat recovery 6, and sends into preheating zone 3 after being heated by the air being used for desorbing；
Step 5, returns step 1 circulation and carries out.
When being embodied as, the preheating temperature of described preheating zone 3 air is 50 DEG C～200 DEG C, the decomposition temperature of described pyrolysis zone 4 is 600 DEG C～1000 DEG C, and the temperature of described first heat recovery 5 delivery air is lower than 200 DEG C, and the temperature of air is discharged lower than 60 DEG C in described second heat recovery 6.
Claims (8)
1. a lacquer spraying waste gas purifies continuous processing system, it is characterized in that: include the first adsorption zone (1), second adsorption zone (2), preheating zone (3) and pyrolysis zone (4), the exhaust gas inlet of described first adsorption zone (1) and the second adsorption zone (2) is used for collecting lacquer spraying waste gas, the Waste gas outlet of described first adsorption zone (1) and described second adsorption zone (2) discharges the waste gas after adsorption treatment each through discharge tube, the heat of desorption air intlet of described first adsorption zone (1) and the second adsorption zone (2) is both connected in the outlet of described preheating zone (3), the hot air outlet of described first adsorption zone (1) and the second adsorption zone (2) is connected to the first heat recovery (5), the outlet of this first heat recovery (5) is connected with described pyrolysis zone (4), the outlet of described pyrolysis zone (4) is also discharged after the gas after thermal decomposition is carried out heat recovery by described first heat recovery (5) again.
2. lacquer spraying waste gas according to claim 1 purifies continuous processing system, it is characterized in that: the floss hole described first heat recovery (5) is also associated with the second heat recovery (6), the air sending into described preheating zone (3), for the first heat recovery (5) expellant gas is carried out heat recovery again, is preheated by this second heat recovery (6).
3. lacquer spraying waste gas according to claim 2 purifies continuous processing system, it is characterized in that: in the exhaust gas inlet of described first adsorption zone (1), Waste gas outlet, heat of desorption air intlet and hot air outlet are respectively arranged with the first valve (7), second valve (8), 3rd valve (9) and the 4th valve (10), exhaust gas inlet described second adsorption zone (2), Waste gas outlet, heat of desorption air intlet and hot air outlet are respectively arranged with the 5th valve (11), 6th valve (12), 7th valve (13) and the 8th valve (14).
4. the lacquer spraying waste gas according to claim 1 or 2 or 3 purifies continuous processing system, it is characterised in that: the adsorbate that described first adsorption zone (1) and the second adsorption zone (2) adopt can be at least one in granular active carbon, particulate molecular sieve, NACF, Alveolate activated carbon, cellular molecular sieve.
5. the purification method of a lacquer spraying waste gas as claimed in claim 3 purification continuous processing system, it is characterised in that carry out according to following steps:
Step 1, adsorption cleaning:
Close the 5th valve (11) corresponding to the second adsorption zone (2) and the 6th valve (12), open the first valve (7) on the first adsorption zone (1) and the second valve (8), and close the 3rd valve (9) and the 4th valve (10)；Lacquer spraying waste gas enters first adsorption zone (1) of cleaning system after collection, pretreatment, and the adsorbed waste gas purified directly is discharged by discharge tube afterwards；
When the first adsorption zone (1) adsorb saturated after, starting working in second adsorption zone (2): closes the first valve (7) on the first adsorption zone (1) and the second valve (8), open the 5th valve (11) and the 6th valve (12), close the 7th valve (13) and the 8th valve (14), lacquer spraying waste gas enters second adsorption zone (2) of cleaning system after collection, pretreatment, and the adsorbed waste gas purified directly is discharged by discharge tube afterwards；
Step 2, desorbing processes:
When the first adsorption zone (1) adsorb saturated after, the first adsorption zone (1) starts desorbing: close the first valve (7) and the second valve (8), opens the 3rd valve (9) and the 4th valve (10)；Preheated district (3) is preheating to the hot-air of uniform temperature and enters the first adsorption zone (1) and adsorbed VOCs desorbing got off, and flows into pyrolysis zone (4) with hot-air；
After the first adsorption zone (1) desorbing completes, second adsorption zone (2) can start desorption process: closes the 5th valve (11) and the 6th valve (12), opens the 7th valve (13) and the 8th valve (14)；Preheated district (3) is preheating to the hot-air of uniform temperature and enters the second adsorption zone (2) and adsorbed VOCs desorbing got off, and flows into pyrolysis zone (4) with hot-air；
Step 3, heat resolve:
Described first adsorption zone (1) or the second adsorption zone (2) are desorbed the VOCs got off and enter the first heat recovery (5) with hot-air and be heated, it is then fed into pyrolysis zone (4) and VOCs is pyrolyzed into CO2, water etc., and the hot-air after thermal decomposition is sequentially sent to described first heat recovery (5) and the second heat recovery (6)；
Step 4, heat recovery:
Hot-air after thermal decomposition carries out heat recovery in the first heat recovery (5), and for heating containing the hot-air being desorbed VOCs, the hot-air that described first heat recovery (5) exports sends into preheating zone (3) after carrying out heat recovery in the second heat recovery (6) and being heated by the air being used for desorbing；
Step 5, returns step 1 circulation and carries out.
6. lacquer spraying waste gas according to claim 5 purifies the purification method of continuous processing system, it is characterised in that: desorbing described in step 2 processes and adopts subregion desorption mode.
7. lacquer spraying waste gas according to claim 5 purifies the purification method of continuous processing system, it is characterised in that: pyrolysis zone described in step 3 (4) and the first heat recovery (5) adopt Electric heating to ensure the temperature needed for thermal decomposition process.
8. the lacquer spraying waste gas according to claim 5 or 7 purifies the purification method of continuous processing system, it is characterized in that: the preheating temperature of described preheating zone (3) air is 50 DEG C～200 DEG C, the decomposition temperature of described pyrolysis zone (4) is 600 DEG C～1000 DEG C, the temperature of described first heat recovery (5) delivery air is lower than 200 DEG C, and the temperature of described second heat recovery (6) discharge air is lower than 60 DEG C.
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| CN102941000A (en) * | 2012-11-12 | 2013-02-27 | 天津市联合环保工程设计有限公司 | Organic waste gas multifunctional integral processing device |
| CN105233622A (en) * | 2015-11-03 | 2016-01-13 | 济南圣泉集团股份有限公司 | VOC (volatile organic compound) waste gas treatment device and method for pharmaceutical and chemical industry |
| CN206008366U (en) * | 2016-04-07 | 2017-03-15 | 重庆纽贝环保科技有限公司 | Spray paint exhaust gas purification equipment |
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