CN216125419U - VOCS adsorbs clean system - Google Patents
VOCS adsorbs clean system Download PDFInfo
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- CN216125419U CN216125419U CN202121848390.XU CN202121848390U CN216125419U CN 216125419 U CN216125419 U CN 216125419U CN 202121848390 U CN202121848390 U CN 202121848390U CN 216125419 U CN216125419 U CN 216125419U
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- 238000001179 sorption measurement Methods 0.000 claims abstract description 35
- 239000002912 waste gas Substances 0.000 claims abstract description 18
- 239000010865 sewage Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 239000003463 adsorbent Substances 0.000 claims description 172
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 103
- 238000011069 regeneration method Methods 0.000 claims description 31
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- 238000005507 spraying Methods 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
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- 238000000926 separation method Methods 0.000 claims description 8
- 238000003795 desorption Methods 0.000 claims description 7
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 230000001172 regenerating effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 239000013505 freshwater Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims 1
- 239000002351 wastewater Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 14
- 230000007613 environmental effect Effects 0.000 abstract description 4
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- 238000005516 engineering process Methods 0.000 description 1
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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
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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
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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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
- B01D2257/00—Components to be removed
- B01D2257/80—Water
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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
-
- 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
- B01D2259/402—Further details for adsorption processes and devices using two beds
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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
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a VOCS adsorption purification system, which comprises a first collection purification device and a second collection purification device, provides a targeted implementation method aiming at different application conditions, and adopts distributed collection purification treatment. For the places where VOCS is not easy to collect in a centralized way and the concentration of VOCS is higher and exceeds the standard in detection, a first collecting and purifying device is used for carrying out adsorption purification on VOCS; and for a sewage well or a place with limited space where the concentration of the VOCS is low and the concentrated collection is not easy, a second collection and purification device is used for carrying out adsorption purification on the VOCS. The utility model ensures that VOCS waste gas and peculiar smell treatment which are difficult to be collected and purified in a centralized way on site has feasibility, safe and stable operation and obvious environmental benefit.
Description
Technical Field
The utility model relates to the technical field of environmental protection, in particular to a VOCS adsorption purification system.
Background
VOCS (volatile organic compounds) refers to organic compounds with saturated vapor pressure of more than 133.32Pa at normal temperature and boiling point of less than 260 ℃ at normal pressure, and the treatment of VOCS is an important problem which is generally concerned by countries and enterprises due to the serious influence on production and ecological environment.
The collection and treatment of the VOCS can be divided into two forms of a centralized collection and purification mode (centralized type, organized discharge) and a dispersed distribution collection and purification mode (distributed type, unorganized discharge). From the prior art, the adsorption method technology is mature and reliable, but different from the centralized method, the distributed method has the following difficulties in the technical implementation form: 1) the concentrated collection and purification are not easy, and the concentration and the yield of VOCS are unstable; 2) the waste gas often contains moisture, which has great influence on the operation and regeneration period of the adsorbent; 3) the purification device usually operates outdoors, and the low-temperature operation in winter has great influence on the adsorbent; 4) because the adsorption belongs to a heat release process, the adsorption has higher requirements on safe operation; 5) the adsorbent is difficult to regenerate; 6) the purification device is difficult to be supplied with power in a centralized way, and the device is difficult to be operated by a special person on duty.
In the distributed purification device, the VOCS adsorption purification problem of the sewage well is more prominent, and because a targeted adsorption purification device is not developed, volatilization of the device has great influence on the surrounding environment and is also an important source of on-site peculiar smell.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a VOCS adsorption purification system, which can collect and purify VOCS in a safe and feasible mode, ensure the long-period operation of the device and realize the aim of distributed VOCS collection and purification.
The utility model adopts the following technical scheme:
a VOCS adsorption purification system comprises a plurality of first collection purification devices which can be arranged in a distributed mode in a VOCS detection standard exceeding place;
every first collection purifier includes first waste gas collector, first fan, first filter, first adsorber and the second adsorber that loops through the pipeline intercommunication, be equipped with first adsorbent bed in the first adsorber, be equipped with the second adsorbent bed in the second adsorber, first adsorbent bed and second adsorbent bed in be equipped with water resistance adsorbent and low temperature resistant adsorbent respectively, contain VOCS gas through first waste gas collector collects, and pass through behind the first filter filtration particulate impurity, pass through in proper order first adsorber and second adsorber adsorb purify the back certainly the second gas vent of second adsorber discharges.
The system also comprises a plurality of second collecting and purifying devices which are arranged at or near the sewage wellhead, and the plurality of first collecting and purifying devices and the plurality of second collecting and purifying devices are independently arranged;
each second collection and purification device comprises a second waste gas collector, a third adsorber and a second fan which are sequentially communicated, wherein the upper end of the second waste gas collector is connected with the lower end of the third adsorber; a third adsorbent bed layer and a fourth adsorbent bed layer are arranged in the third adsorber, the third adsorbent bed layer is positioned in the middle of the third adsorber and is provided with openings at the upper end and the lower end, the fourth adsorbent bed layer is coated outside the third adsorbent bed layer, the third adsorbent bed layer is communicated with the fourth adsorbent bed layer through the openings at the upper end, and the third adsorbent bed layer and the fourth adsorbent bed layer are respectively filled with a water-resistant adsorbent and a low-temperature-resistant adsorbent; and a second filter is arranged in the second waste gas collector, the second filter is arranged at the lower end opening of the third adsorbent bed, and the VOCS-containing gas is collected by the second waste gas collector, passes through the second filter to filter particle impurities and is discharged from the air outlet of the second fan after being sequentially adsorbed and purified by the third adsorbent bed and the fourth adsorbent bed.
The system also comprises an adsorbent centralized regeneration device used for regenerating the water-resistant adsorbent, wherein the adsorbent centralized regeneration device comprises a desorption steam supply device, a regeneration adsorber, a condenser and an oil-water separation tank which are sequentially communicated through a pipeline, the regeneration adsorber is internally provided with a low-temperature-resistant adsorbent to be regenerated, condensed water separated by the oil-water separation tank is discharged into a sewage storage tank to be subjected to later-stage sewage treatment, and separated organic matters are pumped into the organic matter storage tank to be subjected to organic matter recovery or incineration.
The top of the first adsorber is provided with a first air inlet and a first spraying port, the bottom of the first adsorber is provided with a first exhaust port, and the side wall of the first adsorber is provided with a first circulating water inlet and a first circulating water outlet, wherein the first circulating water inlet is positioned at the upper position of the side wall of the first adsorber, the first circulating water outlet is positioned at the lower position of the side wall of the first adsorber, and spraying water and circulating water pass through the outer side of the shell of the first adsorbent bed layer and are used for cooling the first adsorbent bed layer;
the top of the second adsorber is provided with a second exhaust port and a second spray port, the bottom of the second adsorber is provided with a second air inlet, and the side wall of the second adsorber is provided with a second circulating water inlet and a second circulating water outlet, wherein the second circulating water inlet is positioned at the upper position of the side wall of the second adsorber, the second circulating water outlet is positioned at the lower position of the side wall of the second adsorber, and spray water and circulating water pass through the outer side of the shell of the second adsorbent bed and are used for cooling the second adsorbent bed;
the bottom of the third adsorber is provided with a supporting net, the lower part of the side wall of the third adsorber is provided with a third exhaust port, and the third exhaust port is communicated with the second fan through a guide pipe.
The first spraying port, the first circulating water inlet, the second spraying port and the second circulating water inlet are all provided with control valves;
the first collection and purification device further comprises a first PLC controller, wherein the first PLC controller is respectively electrically connected with the first fan, the first spray port, the first circulating water inlet, the second spray port and a control valve on the second circulating water inlet and respectively controls the opening and closing of the first fan and the control valve;
the second collection and purification device further comprises a second PLC controller, and the second PLC controller is electrically connected with the second fan and used for controlling the second fan to be opened and closed.
The first collection and purification device and the second collection and purification device further respectively comprise a first wind-light integrated power supply device and a second wind-light integrated power supply device, the first wind-light integrated power supply device is electrically connected with the first PLC and the first fan, and the second wind-light integrated power supply device is electrically connected with the second PLC and the second fan and is respectively used for providing electric energy for the first PLC, the first fan, the second PLC and the second fan.
The first adsorbent bed layer shell and the third adsorbent bed layer shell are both provided with a vacuum heat insulation layer; and a temperature measuring and heating element is arranged in the third adsorbent bed layer, and the temperature measuring and heating element is electrically connected with the second PLC and used for controlling the working state of the temperature measuring and heating element.
Still be equipped with fresh water entry and nitrogen gas entry on the regeneration adsorber, the condenser adopts circulating water cooling, including the first condenser and the second condenser of series connection setting.
The concentration of the inlet air NMHC of the first collection and purification device is controlled to be less than or equal to 800mg/m3The NMHC emission concentration is less than or equal to 15mg/m3(ii) a The filling amount of the water-resistant adsorbent in the first adsorbent bed layer is 0.5m3-5m3The filling amount of the low-temperature resistant adsorbent in the second adsorbent bed layer is 0.5m3-5m3The regeneration period of the water-resistant adsorbent in the first adsorbent bed is 30 days to 150 days;
the concentration of the inlet air NMHC of the second collection and purification device is controlled to be less than or equal to 500mg/m3The NMHC emission concentration is less than or equal to 15mg/m3(ii) a The filling amount of the water-resistant adsorbent in the third adsorbent bed layer is 0.2m3-3m3The filling amount of the low-temperature resistant adsorbent in the fourth adsorbent bed layer is 0.2m3-2m3And the regeneration period of the water-resistant adsorbent in the third adsorbent bed is more than or equal to 90 days.
The temperature of the regeneration steam provided by the desorption steam supply device is 110-140 ℃.
The technical scheme of the utility model has the following advantages:
A. the utility model provides a VOCS adsorption purification system aiming at VOCS which is not easy to collect and purify in a centralized way, provides a targeted realization method aiming at different application conditions, and adopts distributed collection and purification treatment. For the places where VOCS is not easy to collect in a centralized way and the concentration of VOCS is higher and exceeds the standard in detection, a first collecting and purifying device is used for carrying out adsorption purification on VOCS; and for a sewage well or a place with limited space where the concentration of the VOCS is low and the concentrated collection is not easy, a second collection and purification device is used for carrying out adsorption purification on the VOCS.
B. The utility model provides the complementary operation of double adsorbents aiming at the problem of high and low temperature operation of outdoor environment moisture, and adopts vacuum heat insulation measures to ensure the long-period reliable operation of the adsorbents. The double adsorbents select a water-resistant adsorbent and a low-temperature-resistant adsorbent, and the water-resistant adsorbent has large adsorption capacity, is moisture-resistant and easy to regenerate, but is not low-temperature-resistant; the low temperature resistant adsorbent has large adsorption capacity, wide applicable components, and is applicable to low temperature conditions, but is not resistant to moisture. The method adopts a mode of combining two adsorbents, and can meet the overall performance requirements of large adsorption capacity, moisture resistance and low temperature resistance through performance complementation.
C. The VOCS treatment system provided by the utility model has the advantages that the VOCS waste gas and peculiar smell treatment which is difficult to collect and purify in a centralized manner on site is feasible, safe and stable operation is realized, and obvious environmental benefits are realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings which are needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained from the drawings without inventive labor to those skilled in the art.
FIG. 1 is a schematic view of the overall structure of a first collection and purification device according to the present invention;
FIG. 2 is a schematic view of a first adsorber of the present invention;
FIG. 3 is a schematic diagram of a second adsorber of the utility model;
FIG. 4 is a schematic view of the overall structure of a second collection and purification device according to the present invention;
FIG. 5 is a schematic view of the overall structure of the concentrated adsorbent regenerating apparatus according to the present invention.
The labels in the figure are as follows:
1-first Collection and purification device
11-first exhaust collector, 12-first fan, 13-first filter
14-first adsorber
141-a first adsorbent bed layer, 142-a first gas inlet, 143-a first spray opening,
144-first vent, 145-first inlet for recycled water, 146-first outlet for recycled water,
147-water drain valve
15-second adsorber
151-second adsorbent bed, 152-second exhaust port, 153-second spray port,
154-a second inlet port, 155-a second inlet for recycled water, 156-a second outlet for recycled water,
157-trap
16-a first PLC controller, 17-a first wind-solar integrated power supply;
2-second collecting and purifying device
21-second exhaust gas collector, 22-second Filter
23-third adsorber
231-third adsorbent bed
2311 temperature measuring and heating element
232-fourth adsorbent bed, 233-support mesh, 234-third gas vent
24-a second fan, 25-a second PLC controller and 26-a second wind-solar integrated power supply;
3-adsorbent centralized regeneration device
31-desorption steam supply device
32-regeneration adsorber
321-fresh water inlet, 322-Nitrogen inlet
33-condenser
331-first condenser, 332-second condenser
34-an oil-water separation tank, 35-a sewage storage tank and 36-an organic matter storage tank.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model provides a VOCS (volatile organic compounds) adsorption purification system, which comprises a plurality of first collection purification devices 1 which can be arranged in a VOCS detection standard exceeding place, a plurality of second collection purification devices 2 which can be arranged at a sewage wellhead and an adsorbent centralized regeneration device 3 for regenerating water-resistant adsorbents, wherein the first collection purification devices 1 and the second collection purification devices 2 are arranged separately.
As shown in fig. 1, each first collection and purification device 1 includes a first exhaust gas collector 11, a first fan 12, a first filter 13, a first adsorber 14 and a second adsorber 15 which are sequentially connected by a pipeline, a first adsorbent bed 141 is disposed in the first adsorber 14, a second adsorbent bed 151 is disposed in the second adsorber 15, a water-resistant adsorbent and a low-temperature-resistant adsorbent are respectively disposed in the first adsorbent bed 141 and the second adsorbent bed 151, and the VOCS-containing gas is collected by the first exhaust gas collector 11, filtered by the first filter 13 for particulate impurities, sequentially adsorbed and purified by the first adsorber 14 and the second adsorber 15, and then discharged from a second exhaust port 152 of the second adsorber 15.
Further, as shown in fig. 2, the top of the first adsorber 14 is provided with a first air inlet 142 and a first spraying port 143, the bottom is provided with a first air outlet 144, and the sidewall is provided with a first circulating water inlet 145 and a first circulating water outlet 146, wherein the first circulating water inlet 145 is located at an upper position of the sidewall of the first adsorber 14, the first circulating water outlet 146 is located at a lower position of the sidewall of the first adsorber 14, and the sprayed water and the circulating water pass through the outer side of the shell of the first adsorbent bed 141 to cool the temperature of the first adsorbent bed 141. The first adsorbent bed layer 141 shell and the third adsorbent bed layer (231) shell are both provided with vacuum insulation layers. As shown in fig. 3, the second adsorber 15 has a second exhaust port 152 and a second spray port 153 at the top, a second air inlet 154 at the bottom, and a second circulating water inlet 155 and a second circulating water outlet 156 on the sidewalls, wherein the second circulating water inlet 155 is located at the upper position of the sidewall of the second adsorber 15, the second circulating water outlet 156 is located at the lower position of the sidewall of the second adsorber 15, and the spray water and the circulating water pass through the outside of the second adsorbent bed 151 to cool the temperature of the second adsorbent bed 151.
Control valves are arranged on the first spraying port 143, the first circulating water inlet 145, the second spraying port 153 and the second circulating water inlet 155. The first collection and purification device 1 further comprises a first PLC (programmable logic controller) 16 and a first wind-solar integrated power supply 17, wherein the first PLC 16 is respectively electrically connected with the first fan 12, the first spraying port 143, the first circulating water inlet 145, the second spraying port 153 and the control valve on the second circulating water inlet 155, and is used for respectively controlling the first fan 12 and the control valve to be opened and closed. The first wind-solar integrated power supply 17 is electrically connected with the first PLC 16 and the first fan 12 and provides electric energy for the first PLC 16 and the first fan 12.
The first collecting and purifying device 1 can be placed in a place where VOCS detection exceeds standard, is suitable for places where VOCS is not easy to collect in a centralized manner, VOCS concentration is high, and circulating cooling water is easy to obtain, and adopts circulating water to radiate and spray heat by adopting a tubular heat exchanger under the condition of possible adsorption heat release and over-temperature; for places where circulating water is not easily available, natural air cooling measures can be adopted for heat dissipation. The power supply line is preferentially adopted for supplying power with the power supply condition, and the wind-solar integrated power supply mode can be adopted for supplying power without the power supply condition.
In order to avoid the freezing inactivation of the water-resistant adsorbent in the first adsorbent bed layer 141 in a low-temperature environment, a vacuum heat-insulating layer can be arranged on the bed layer shell, and power supply or steam heat insulation can be adopted in places where power supply and steam can be obtained. When the concentration of VOCS is higher and the temperature of the adsorbent bed reaches the set temperature, the first PLC controller 16 starts spraying and circulating water cooling. In places where circulating water is not easily available, a natural air cooling measure can be adopted, and the first PLC controller 16 stops running after the temperature rise exceeds the standard.
When the adsorbent bed has a large amount of water collection due to spraying or the like during the operation of the first collection purification apparatus 1, the first adsorber 14 may be drained by using the drain valve 147 and the second adsorber 15 may be drained by using the drain valve 157. After regular tail gas detection exceeds the standard, the water-resistant adsorbent in the first adsorber 14 is sent to the adsorbent centralized regeneration device 3 for regeneration, and the low-temperature-resistant adsorbent in the second adsorber 15 is regenerated by the regeneration method or incinerated. The first PLC controller 16 is internally provided with a wireless signal transmission device, and sends running condition data such as temperature rise, pressure and spraying to a central control room for unified monitoring.
As shown in fig. 4, each second collection and purification device 2 includes a second exhaust gas collector 21, a third adsorber 23 and a second fan 24 which are sequentially conducted, a third adsorbent bed 231 and a fourth adsorbent bed 232 are arranged in the third adsorber 23, the third adsorbent bed 231 is located in the middle of the third adsorber 23, the upper end and the lower end of the third adsorbent bed are open, the fourth adsorbent bed 232 is coated outside the third adsorbent bed 231, so as to perform both adsorption and thermal insulation, and the third adsorbent bed (231) housing is provided with a vacuum insulation layer to prevent freezing and inactivation of the water-resistant adsorbent in the third adsorbent bed 231. The third adsorbent bed 231 is communicated with the fourth adsorbent bed 232 through the upper end opening of the third adsorbent bed 231, the third adsorbent bed 231 and the fourth adsorbent bed 232 are respectively filled with a water-resistant adsorbent and a low-temperature-resistant adsorbent, the second exhaust gas collector 21 is internally provided with a second filter 22, the second filter 22 is communicated with the third adsorbent bed 231 through the lower end opening of the third adsorbent bed 231, the VOCS-containing gas is collected by the second exhaust gas collector 21, and after particulate impurities are filtered by the second filter 22, the VOCS-containing gas is sequentially adsorbed and purified by the third adsorbent bed 231 and the fourth adsorbent bed 232 and then is discharged from the air outlet of the second fan 24.
The bottom of the third adsorber 23 is provided with a support net 233, the lower part of the side wall of the third adsorber 23 is provided with a third exhaust port 234, and the third exhaust port 234 is communicated with the second fan 24 through a conduit.
The second collecting and purifying device 2 further comprises a second PLC 25 and a second wind-solar integrated power supply 26, wherein the second PLC 25 is electrically connected with the second fan 24 and used for controlling the second fan 24 to be opened and closed. The second wind-solar integrated power supply 26 is electrically connected with the second PLC controller 25 and the second fan 24, and is used for supplying electric energy to the second PLC controller 25 and the second fan 24. A temperature measuring and heating element 2311 is arranged in the third adsorbent bed layer 231, and the temperature measuring and heating element 2311 is electrically connected with the second PLC controller 25 and is used for controlling the working state of the temperature measuring and heating element 2311. When the temperature is lower than the set temperature, the heating is controlled by the second PLC 25; when the concentration of VOCS is high and the temperature of the adsorbent bed reaches the set temperature, the operation is stopped by the second PLC 25.
The second collection and purification device 2 is suitable for places with low concentration of VOCS, difficult centralized collection and difficult acquisition of circulating water, such as a sewage well or a place with limited space. The method is particularly suitable for places operating in winter in low-temperature environments. The power supply line is preferentially adopted for supplying power under the power supply condition, the low-temperature operation below-35 ℃ can be adopted at the time, and the wind-solar integrated power supply mode can be adopted for supplying power without the power supply condition.
In use, the third adsorbent bed 231 may naturally sink into the sump when higher moisture in the intake air causes condensation to form. In non-bilge applications, the second exhaust collector 21 may be placed on the side outside the third adsorber 23.
The third adsorber 23 is filled with two adsorbents separately and is provided with a lid for easy filling and regeneration. After regular tail gas detection exceeds the standard, the water-resistant adsorbent adsorption box in the third adsorbent bed 231 can be detached and sent to the adsorbent centralized regeneration device 3 for regeneration without unloading, and the low-temperature-resistant adsorbent in the fourth adsorber 24 is regenerated or incinerated according to the regeneration method. The second PLC 25 is internally provided with a wireless signal transmission device, and transmits the operation condition data such as temperature rise, pressure and the like to a central control room for unified monitoring.
As shown in fig. 5, the adsorbent centralized regeneration device 3 includes a desorption steam supply device 31, a regeneration adsorber 32, a condenser 33 and an oil-water separation tank 34 which are sequentially communicated through a pipeline, the regeneration adsorber 32 is filled with a water-resistant adsorbent to be regenerated, condensed water separated by the oil-water separation tank 34 is discharged into a sewage storage tank 35 for later sewage treatment, and separated organic matters are pumped into an organic matter storage tank 36 for organic matter recovery or incineration. The regeneration adsorber 32 is also provided with a fresh water inlet 321 and a nitrogen inlet 322, and the condenser 33 is cooled by circulating water and comprises a first condenser 331 and a second condenser 332 which are arranged in series.
The water-resistant adsorbent is preferably adsorbent resin, has large adsorption capacity, is resistant to moisture, is easy to regenerate, and cannot resist low temperature; the low-temperature resistant adsorbent is preferably activated carbon or molecular sieve, and has the advantages of large adsorption capacity, wide applicable components, applicability to low-temperature conditions and no water resistance. The method adopts a mode of combining two adsorbents, and can meet the overall performance requirements of large adsorption capacity, moisture resistance and low temperature resistance through performance complementation.
The VOCS adsorption purification method comprises a VOCS concentration standard exceeding purification step S1:
s1.1, placing a first collecting and purifying device 1 in a VOCS (volatile organic Compounds) to-be-collected place;
s1.2, opening a first fan 12, and collecting VOCS-containing gas by a first waste gas collector 11;
s1.3, enabling the collected VOCS gas to enter a first filter 13, and filtering particle impurities such as dust and the like;
s1.4, the gas filtered in the step S1.3 enters a first adsorber 14, and primary purification is completed after water and VOCS components are adsorbed by a water-resistant adsorbent in the first adsorber;
s1.5, the gas primarily purified in the step S1.4 enters a second adsorber 15, and the residual VOCS components are adsorbed by a low-temperature-resistant adsorbent in the second adsorber and then are discharged after reaching the standard.
The method also comprises a step S2 of purifying the sewage wellhead or other space-limited places with excessive VOCS concentration:
s2.1, directly placing the second collecting and purifying device 2 at a sewage wellhead or connecting the second collecting and purifying device with the sewage wellhead through a guide pipe or other places with limited space;
s2.2, opening a second fan 24, and collecting the VOCS-containing gas by a second waste gas collector 21;
s2.3, filtering particle impurities such as dust and the like from the collected VOCS gas through a second filter 22;
and S2.4, allowing the gas filtered in the step S2.3 to enter a third adsorber 23, adsorbing moisture and VOCS components by a water-resistant adsorbent in the middle, allowing the gas to enter a fourth adsorbent bed 232 from an outlet at the upper part of the third adsorbent bed 231, and adsorbing the residual VOCS by a low-temperature-resistant adsorbent to reach the standard and discharging.
When the content of the VOCS in the exhaust gas exceeds the standard, the method also comprises a step S3 of regenerating the water-resistant adsorbent:
s3.1, connecting the first adsorber or the third adsorber to be regenerated into an adsorbent centralized regeneration device;
s3.2, introducing desorption high-temperature steam for stripping treatment, desorbing VOCS adsorbed by the water-resistant adsorbent, and introducing the desorbed VOCS and the steam into a condenser for condensation treatment;
and S3.3, condensing the condensate by the two-stage condenser and then feeding the condensate into an oil-water separation tank 34, pumping the upper-layer organic matters into an organic matter storage tank 36 for recycling or incineration treatment, and feeding the lower-layer condensate into a sewage storage tank 35 for unified treatment.
The specific process operating conditions of the application are as follows:
main process operating conditions
The VOCS treatment system provided by the utility model has the advantages that the VOCS waste gas and peculiar smell treatment which is difficult to collect and purify in a centralized manner on site is feasible, safe and stable operation is realized, and obvious environmental benefits are realized.
The utility model is applicable to the prior art.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the utility model.
Claims (10)
1. A VOCS adsorption purification system is characterized by comprising a plurality of first collection purification devices (1) which can be arranged in a distributed mode in a VOCS standard-exceeding detection place;
every first collection purifier (1) is including passing through first waste gas collector (11), first fan (12), first filter (13), first adsorber (14) and second adsorber (15) of pipeline intercommunication in proper order, be equipped with first adsorbent bed (141) in first adsorber (14), be equipped with second adsorbent bed (151) in second adsorber (15), first adsorbent bed (141) and second adsorbent bed (151) in be equipped with water resistance adsorbent and low temperature resistant adsorbent respectively, contain VOCS gas through first waste gas collector (11) are collected, and pass through behind first filter (13) filtration particulate impurity, in proper order through first adsorber (14) and second adsorber (15) adsorb the second gas vent (152) of purification back from second adsorber (15) are discharged.
2. A VOCS adsorption purification system according to claim 1, further comprising a second plurality of collection purification units (2) positioned at or near the wellhead of the wastewater, wherein the first plurality of collection purification units (1) and the second plurality of collection purification units (2) are independently positioned;
each second collection and purification device (2) comprises a second waste gas collector (21), a third adsorber (23) and a second fan (24) which are sequentially communicated, and the upper end of the second waste gas collector is connected with the lower end of the third adsorber; a third adsorbent bed (231) and a fourth adsorbent bed (232) are arranged in the third adsorber (23), the third adsorbent bed (231) is positioned in the middle of the third adsorber (23), the upper end and the lower end of the third adsorbent bed are open, the fourth adsorbent bed (232) covers the outer side of the third adsorbent bed (231), the third adsorbent bed (231) is communicated with the fourth adsorbent bed (232) through the upper end of the third adsorbent bed (231), and a water-resistant adsorbent and a low-temperature-resistant adsorbent are respectively filled in the third adsorbent bed (231) and the fourth adsorbent bed (232); and a second filter (22) is arranged in the second waste gas collector (21), the second filter (22) is arranged at the opening at the lower end of the third adsorbent bed layer (231), and VOCS-containing gas is collected by the second waste gas collector (21), is filtered by the second filter (22) for particle impurities, and is then sequentially adsorbed and purified by the third adsorbent bed layer (231) and the fourth adsorbent bed layer (232) and then is discharged from an air outlet of the second fan (24).
3. The VOCS adsorption purification system according to claim 2, further comprising an adsorbent centralized regeneration device (3) for regenerating a water-resistant adsorbent, wherein the adsorbent centralized regeneration device (3) comprises a desorption steam supply device (31), a regeneration adsorber (32), a condenser (33) and an oil-water separation tank (34) which are sequentially communicated through a pipeline, a low-temperature-resistant adsorbent to be regenerated is filled in the regeneration adsorber (32), condensed water separated by the oil-water separation tank (34) is discharged into a sewage storage tank (35) for later sewage treatment, and the separated organic matters are pumped into an organic matter storage tank (36) for organic matter recovery or incineration.
4. A VOCS adsorption purification system of claim 3, wherein the first adsorbent (14) is provided with a first inlet port (142) and a first spray port (143) at the top, a first exhaust port (144) at the bottom, and a first inlet port (145) and a first outlet port (146) for circulating water at the side wall, wherein the first inlet port (145) for circulating water is located at the upper position of the side wall of the first adsorbent (14), the first outlet port (146) for circulating water is located at the lower position of the side wall of the first adsorbent (14), and spray water and circulating water pass through the outside of the shell of the first adsorbent bed (141) for cooling the first adsorbent bed (141);
a second exhaust port (152) and a second spraying port (153) are arranged at the top of the second adsorber (15), a second air inlet (154) is arranged at the bottom, a second circulating water inlet (155) and a second circulating water outlet (156) are arranged on the side wall of the second adsorber (15), the second circulating water inlet (155) is positioned at the upper position of the side wall of the second adsorber (15), the second circulating water outlet (156) is positioned at the lower position of the side wall of the second adsorber (15), and spraying water and circulating water pass through the outer side of the shell of the second adsorbent bed (151) and are used for cooling the second adsorbent bed (151);
the bottom of the third adsorber (23) is provided with a support net (233), the lower part of the side wall of the third adsorber (23) is provided with a third exhaust port (234), and the third exhaust port (234) is communicated with the second fan (24) through a guide pipe.
5. A VOCS adsorption purification system according to claim 4, wherein the first spray port (143), the first inlet (145) for circulating water, the second spray port (153) and the second inlet (155) for circulating water are all provided with control valves;
the first collection and purification device (1) further comprises a first PLC (programmable logic controller) (16), wherein the first PLC (16) is respectively electrically connected with the first fan (12), the first spraying port (143), the first circulating water inlet (145), the second spraying port (153) and a control valve on the second circulating water inlet (155) and respectively controls the first fan (12) and the control valve to be opened and closed;
the second collection and purification device (2) further comprises a second PLC (programmable logic controller) (25), and the second PLC (25) is electrically connected with the second fan (24) and used for controlling the second fan (24) to be opened and closed.
6. A VOCS adsorption purification system according to claim 5, wherein the first collection purification device (1) and the second collection purification device (2) further comprise a first wind-light integrated power supply (17) and a second wind-light integrated power supply (26), respectively, the first wind-light integrated power supply (17) being electrically connected to the first PLC controller (16) and the first fan (12), the second wind-light integrated power supply (26) being electrically connected to the second PLC controller (25) and the second fan (24) for providing electrical power to the first PLC controller (16), the first fan (12), the second PLC controller (25) and the second fan (24), respectively.
7. A VOCS adsorption purification system according to claim 6 wherein the first adsorbent bed (141) shell and the third adsorbent bed (231) shell are each provided with a vacuum insulation layer; a temperature measuring and heating element (2311) is arranged in the third adsorbent bed layer (231), and the temperature measuring and heating element (2311) is electrically connected with the second PLC (25) and is used for controlling the working state of the temperature measuring and heating element (2311).
8. A VOCS adsorption purification system according to claim 7 wherein the regenerative adsorber (32) is further provided with a fresh water inlet (321) and a nitrogen inlet (322), and the condenser (33) is cooled with circulating water and comprises a first condenser (331) and a second condenser (332) arranged in series.
9. A VOCS adsorption purification system according to claim 8 wherein the first collection purification device (1) is controlled to have an inlet NMHC concentration of 800mg/m or less3The NMHC emission concentration is less than or equal to 15mg/m3(ii) a The filling amount of the water-resistant adsorbent in the first adsorbent bed layer (141) is 0.5m3-5m3The low temperature resistant adsorbent in the second adsorbent bed (151) is filled in an amount of 0.5m3-5m3The regeneration period of the water-resistant adsorbent in the first adsorbent bed layer (141) is 30-150 days;
the concentration of the inlet air NMHC of the second collection and purification device (2) is controlled to be less than or equal to 500mg/m3The NMHC emission concentration is less than or equal to 15mg/m3(ii) a The water resistant adsorbent in the third adsorbent bed (231) is packed in an amount of 0.2m3-3m3The fourth adsorbent bed (232) has a low temperature resistant adsorbent loading of 0.2m3-2m3And the regeneration period of the water-resistant adsorbent in the third adsorbent bed layer (231) is more than or equal to 90 days.
10. A VOCS adsorption purification system as claimed in claim 9 wherein the desorption steam supply means (31) provides regeneration steam at a temperature of 110 ℃ to 140 ℃.
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