CN110947277A - VOCs adsorbs desorption active carbon case - Google Patents

VOCs adsorbs desorption active carbon case Download PDF

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Publication number
CN110947277A
CN110947277A CN201811118052.3A CN201811118052A CN110947277A CN 110947277 A CN110947277 A CN 110947277A CN 201811118052 A CN201811118052 A CN 201811118052A CN 110947277 A CN110947277 A CN 110947277A
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China
Prior art keywords
activated carbon
box
layer
desorption
adsorption
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CN201811118052.3A
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Chinese (zh)
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廖精华
何升宝
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Fujian Aierpu Environmental Protection Co ltd
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Fujian Aierpu Environmental Protection Co ltd
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Priority to CN201811118052.3A priority Critical patent/CN110947277A/en
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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
    • B01D53/0462—Temperature swing adsorption
    • 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
    • B01D53/0438—Cooling or heating systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)
  • Separation Of Gases By Adsorption (AREA)

Abstract

The invention provides a VOCs adsorption and desorption activated carbon box, which can solve the problem that the whole height of equipment is too high or the occupied area is too large because an air inlet and an air outlet of the conventional activated carbon box are respectively arranged at two sides of the activated carbon box. Meanwhile, the contact area of the activated carbon and the waste gas is increased, the treatment air quantity is improved, the filtering air speed is reduced, and the adsorption and desorption efficiency can be obviously improved. It includes the box and is located two-layer activated carbon layer in the box, the bottom surface of box is equipped with air inlet and gas outlet, two-layer activated carbon layer along box length direction sets up and the perpendicular to the bottom surface of box, two-layer activated carbon layer all place in backup pad in the box, the backup pad with space adopts the baffle to cut apart into air inlet chamber and air outlet chamber between the box bottom surface, air inlet chamber intercommunication the air inlet with two-layer activated carbon layer lateral surface space, air outlet chamber intercommunication the gas outlet with space between two-layer activated carbon layer, activated carbon box side sets up the access door, when the access door is opened with space communicates with each other between two-layer activated carbon layer.

Description

VOCs adsorbs desorption active carbon case
Technical Field
The invention relates to one of active carbon adsorption methods in a volatile organic waste gas treatment device, belonging to the technical field of industrial volatile organic waste gas (VOCs) treatment.
Background
The active carbon adsorption desorption and catalytic combustion technology is a commonly used process for treating industrial VOCs waste gas in the market at present, particularly aims at treating VOCs waste gas with large air volume and medium and low concentration, and has the characteristics of low manufacturing cost, good purification effect, simple operation and maintenance and the like. The quantity of the activated carbon boxes of the process is usually not less than 2, and the activated carbon boxes are adjacently arranged side by side, and an adsorption air main pipe and a desorption air main pipe between the activated carbon boxes are all connected in series, so that the continuous adsorption and desorption of the whole process device on the VOCs waste gas can be realized.
The conventional mode of the activated carbon adsorption and desorption box of the process is shown in figure 1, wherein a box body 1 is connected with an upper bell mouth 3 and a lower bell mouth 2, the upper bell mouth 3 is simultaneously connected with an adsorption inlet valve 12 and a desorption outlet valve 14, and the lower bell mouth 2 is simultaneously connected with an adsorption outlet valve 8 and a desorption inlet valve 10; when the activated carbon box is used for adsorption, VOCs-containing waste gas enters the activated carbon box body 1 from the adsorption air inlet main pipe 11 through the adsorption inlet valve 12, and clean air is exhausted into the adsorption air outlet main pipe 7 from the adsorption outlet valve 8 after being adsorbed by the activated carbon 5; when the activated carbon box is in desorption, desorption hot air enters the activated carbon box body 1 from the desorption inlet valve 10, the activated carbon 5 is desorbed and regenerated under the action of hot air, releases VOCs components and is mixed into the hot air, flows through the desorption outlet valve 14, enters the desorption air outlet pipe 13, and then is introduced into a subsequent catalytic combustion device.
The conventional activated carbon box has the advantages of simple structure, convenient manufacture, uniform gas distribution and good purification effect. The defect is that the internal sectional area of the activated carbon box is the airflow filtering area, so the air volume for waste gas treatment is limited, and if waste gas with larger air volume needs to be treated, the horizontal sectional area of the activated carbon box needs to be increased or the number of the activated carbon boxes needs to be increased, which leads to the increase of the occupied area of equipment. Meanwhile, in order to ensure that the activated carbon box maintains certain adsorption time and adsorption efficiency, the stacking height of the activated carbon needs to be increased so as to ensure the filling amount of the activated carbon, the increase of the height of the activated carbon layer leads to the increase of airflow resistance, the desorption regeneration of the activated carbon is not thorough, the desorption time is prolonged, and the energy consumption of system operation is increased. In addition, because air inlet and gas outlet arrange respectively in activated carbon box upper and lower both ends, the whole height of equipment is higher, and inconvenient maintenance is equipment such as valve, instrument above the activated carbon box.
Disclosure of Invention
The invention aims to solve the technical problem of providing a VOCs adsorption and desorption activated carbon box, which can solve the problem that the whole height of equipment is too high or the occupied area is too large because an air inlet and an air outlet of the conventional activated carbon box are respectively arranged at two sides of the activated carbon box. Meanwhile, the contact area of the activated carbon and the waste gas is increased, the treatment air quantity is improved, the filtering air speed is reduced, and the adsorption and desorption efficiency can be obviously improved.
The technical scheme is as follows: the utility model provides a VOCs adsorbs desorption active carbon case, includes the box and is located two-layer activated carbon layer in the box, the bottom surface of box is equipped with air inlet and gas outlet, two-layer activated carbon layer along box length direction sets up and the perpendicular to the bottom surface of box, two-layer activated carbon layer all place in backup pad in the box, the backup pad with space adoption baffle between the box bottom surface is cut apart into the air inlet chamber and is gone out the air chamber, the air inlet chamber intercommunication the air inlet with two-layer activated carbon layer lateral surface space, go out the air chamber intercommunication the gas outlet with space between two-layer activated carbon layer, activated carbon case box side sets up the access door, when the access door is opened with space between two-layer activated carbon layer communicates with each other.
Furthermore, the activated carbon box body is an inner shell and an outer shell, and heat insulation cotton is filled between the inner shell and the outer shell.
The inner shell is made of stainless steel, and the heat-insulating cotton is aluminum silicate heat-insulating cotton.
Further, the air inlet and the air outlet are both positioned on the bottom surface of the activated carbon box.
Further, the air inlet of the support plate is provided with a shutter for guiding flow, and the air outlet of the support plate is provided with a steel grating.
Further, the two activated carbon layers are honeycomb activated carbon, the specification of the honeycomb activated carbon single block is 100 multiplied by 100mm, and the two activated carbon layers have the same thickness and the thickness is not more than 400 mm.
When the honeycomb type activated carbon is filled, a horizontal plate is arranged at the height of every 300mm to be used as a support, so that the honeycomb type activated carbon at the lower part is prevented from being damaged due to compression.
The inner side and the outer side of the two layers of activated carbon layers are both provided with stainless steel meshes for fixation, so that the honeycomb type activated carbon is prevented from being displaced due to the action of air flow, the stainless steel meshes on the inner side and the outer side of the activated carbon layers are detachable, and the aperture of each stainless steel mesh is 5-30 mm.
Further, the access door is located activated carbon box side and perpendicular to activated carbon layer direction, the access door width is not more than interval between the two-layer activated carbon layer.
The access door is two-layer steel sheet inside and outside, it has the heat preservation cotton to fill between the two-layer steel sheet of inside and outside.
The invention has at least the following advantages.
According to the activated carbon box disclosed by the invention, the airflow direction of the conventional activated carbon box is changed, the air inlet and the air outlet are both positioned at the bottom side of the activated carbon box, the matched valve and the main air pipe are both arranged below the activated carbon box, the activated carbon box is simpler and more convenient to install and more compact in structure, the floor area of equipment is fully utilized, the overall height of the equipment is reduced, and an overhaul platform above the conventional activated carbon box is saved.
According to the activated carbon box, the two activated carbon layers are arranged along the length direction of the activated carbon box, compared with a conventional activated carbon box with the same size, the filtering area and the activated carbon filling amount of the activated carbon layers are effectively increased, the treatment efficiency is improved, the adsorption time and the desorption period are prolonged, and the energy-saving effect is remarkable.
According to the activated carbon box, the access door is arranged on the side face of the activated carbon box and in the direction perpendicular to the activated carbon layer, so that an maintainer can enter the activated carbon box through the access door, the space between the activated carbon layers can realize the maintenance operation, and compared with the conventional activated carbon box, the activated carbon box is more flexible and convenient to operate because the activated carbon is fully distributed on the horizontal section of the whole activated carbon box.
Drawings
Fig. 1 is a schematic view of the overall structure of a conventional activated carbon tank.
Fig. 2 is a front view (cut-away in centering) of the present invention.
Fig. 3 is a top view of the present invention (with the top cover removed).
Fig. 4 is a schematic diagram of a support plate structure according to the present invention.
Fig. 5 is a left side view of the present invention.
The parts in the drawings are marked as follows:
1-a box body; 2-lower bell mouth; 3-upper bell mouth; 4-a support plate; 5-activated carbon; 6-a support frame; 7-adsorption air outlet main pipe; 8-an adsorption outlet valve; 9-a desorption air inlet pipe; 10-desorption inlet valve; 11-main pipe of adsorption air inlet; 12-an adsorption inlet valve; 13-a desorption air outlet pipe; 14-desorption outlet valve;
15-a box body; 16-an activated carbon layer; 17-a support plate; 18-a baffle plate; 19-a support frame; 20-a desorption air inlet pipe; 21-an adsorption outlet valve; 22-adsorption air outlet main pipe; 23-an access door; 24-a sorption inlet valve; 25-adsorption air inlet main pipe; 26-a desorption air outlet pipe; 27-desorption outlet valve; 28-Desorption inlet valve.
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly defined.
Example (b): referring to fig. 2-5, the VOCs adsorption and desorption activated carbon box of the invention comprises a box body 15 and two activated carbon layers 16 positioned in the box body, wherein the bottom surface of the box body 15 is provided with an air inlet and an air outlet, the two activated carbon layers 16 are arranged along the length direction of the box body and are vertical to the bottom surface of the box body 15, the two activated carbon layers 16 are both arranged on a supporting plate 17 in the box body, the space between the supporting plate 17 and the bottom surface of the box body 15 is divided into an air inlet chamber 18-1 and an air outlet chamber 18-2 by a baffle plate 18, the air inlet chamber 18-1 is communicated with the space between the air inlet and the outer side surfaces of the two activated carbon layers, the air outlet chamber 18-2 is communicated with the space between the air outlet and the two activated carbon layers, the side surface of the activated.
Specifically, the activated carbon box body 15 is an inner shell and an outer shell, and heat insulation cotton is filled between the inner shell and the outer shell, so that the heat loss during desorption can be reduced, the heating time of hot air desorption is shortened, the desorption effect is improved, and energy is saved.
Specifically, the inner shell is made of stainless steel, so that the box body can be prevented from being corroded by harmful ingredients in waste gas.
Specifically, the heat preservation cotton is aluminum silicate heat preservation cotton.
Referring to fig. 2 and 5, the air inlet and the air outlet are both located on the bottom surface of the activated carbon box. The air inlet is connected with an adsorption inlet valve 24, an adsorption air inlet main pipe 25, a desorption outlet valve 27 and a desorption air outlet pipe 26; the air outlet is connected with an adsorption outlet valve 21, an adsorption air outlet main pipe 26, a desorption inlet valve 28 (not shown in the figure) and a desorption air inlet pipe 20. The activated carbon box is supported on the ground by the support frame 19, and all valves and pipelines on the lower part of the activated carbon can be manufactured integrally after leaving a factory, so that the installation difficulty of field equipment can be further reduced.
Specifically, as shown in fig. 3-4, shutters are arranged at air inlets 17-1 and 17-2 of the support plate for guiding air flow so as to enable air flow entering the activated carbon box to be uniformly distributed, and a steel grating is arranged at an air outlet 17-3 of the support plate so as to facilitate operation of maintainers on the support plate.
Specifically, as shown in fig. 3, the two activated carbon layers 16 are honeycomb activated carbon, and the thicknesses of the two activated carbon layers 16 are the same and are not greater than 400 mm. This provides the activated carbon layer with the same flow resistance, preventing flow deflection or partial breakthrough.
Specifically, the specification of the honeycomb type activated carbon monolith is 100X 100 mm.
Specifically, when the honeycomb type activated carbon is filled, a horizontal plate is arranged at the height of every 300mm to be used as a support, so that the lower honeycomb type activated carbon is prevented from being damaged due to compression.
Specifically, referring to fig. 3, stainless steel nets (not shown in the drawings) are disposed on the inner side and the outer side of the two activated carbon layers 16 to prevent the honeycomb activated carbon from shifting due to the airflow, and the stainless steel nets on the inner side of the activated carbon layers are detachable.
Specifically, the aperture of the stainless steel net is 5-30 mm.
Specifically, referring to fig. 2-3, the access door 23 is located on the side of the activated carbon box and perpendicular to the direction of the activated carbon layers, and the width of the access door is not greater than the distance between the two activated carbon layers. The access door is two-layer steel sheet inside and outside, and it has the heat preservation cotton to fill between the two-layer steel sheet of inside and outside.
During specific implementation, the 15 quantity of active carbon box is for being no less than 2 and adjacent arrangement side by side, and the female pipe of adsorption air and the female pipe of desorption air all establish ties together, so can realize the continuous absorption and the desorption of whole set of process units.
The working process of the invention is described below: the adsorption and desorption processes are separated.
An adsorption process: when the activated carbon box is in the adsorption process, the desorption outlet valve 27 and the desorption inlet valve 28 are closed, the adsorption inlet valve 24 and the adsorption outlet valve 21 are opened, the waste gas containing VOCs enters the activated carbon box inlet chamber 18-1 from the adsorption air inlet main pipe 25 through the adsorption inlet valve 24, then reaches the activated carbon adsorption area through the support plate air inlets 17-1 and 17-2, in the process that the waste gas enters the inner side surface from the outer side surface of the activated carbon layer 16, VOCs components are adsorbed and trapped by activated carbon, the purified air enters the air outlet chamber 18-2 from the support plate air outlet 17-3, and then enters the adsorption air outlet main pipe 22 through the adsorption outlet valve 21. The purified clean air is finally introduced into the exhaust funnel of the system for high-altitude discharge through the adsorption air outlet main pipe 22.
A desorption process: when the activated carbon box is in a desorption process, the direction of air flow in the activated carbon box is opposite to the direction of air flow during adsorption, specifically, the adsorption inlet valve 24 and the adsorption outlet valve 21 are closed, the desorption outlet valve 27 and the desorption inlet valve 28 are opened, desorption hot air enters the activated carbon box air outlet chamber 18-2 from the desorption air inlet pipe 20 through the desorption inlet valve 28 and then enters the inner side surface space of the activated carbon layer 16 through the support plate air outlet 17-3, hot air flows from the inner side surface to the outer side surface, the temperature of the activated carbon rises under the action of the desorption hot air, VOCs components are desorbed from the activated carbon and are resolved and mixed in the desorption air, and the desorbed waste gas enters the air inlet chamber 18-1 from the support plate air inlets 17-1 and 17-2 and then enters the desorption air outlet pipe 26 through the desorption. The desorbed high-concentration waste gas is finally introduced into a subsequent catalytic combustion device of the system through a desorption air outlet pipe 26 for deep purification.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all structural devices formed by equivalent replacement or equivalent transformation, or directly or indirectly applied to other related technical fields, which are made from the content of the present specification and the attached drawings, are within the scope of the present invention as claimed.

Claims (10)

1. The utility model provides a VOCs adsorbs desorption active carbon case, a serial communication port, include box (15) and be located two-layer activated carbon layer (16) in the box, the bottom surface of box is equipped with air inlet and gas outlet, two-layer activated carbon layer along box length direction sets up and the perpendicular to the bottom surface of box, two-layer activated carbon layer all place in backup pad (17) in the box, the backup pad with space adopts baffle (18) to cut apart into air inlet chamber and air outlet chamber between the box bottom surface, air inlet chamber intercommunication the air inlet with two-layer activated carbon layer lateral surface space, air outlet chamber intercommunication the gas outlet with space between two-layer activated carbon layer, activated carbon case box side sets up access door (23), when the access door is opened with space between two-layer activated carbon layer communicates with each other.
2. The adsorption and desorption activated carbon box for VOCs according to claim 1, wherein the activated carbon box body is an inner shell and an outer shell, and heat insulation cotton is filled between the inner shell and the outer shell.
3. The adsorption and desorption activated carbon box for VOCs according to claim 2, wherein the inner shell is made of stainless steel, and the heat insulation cotton is aluminum silicate heat insulation cotton.
4. The adsorption and desorption activated carbon tank for VOCs as claimed in claim 1, wherein the air inlet and the air outlet are both located on the bottom surface of the activated carbon tank.
5. The adsorption and desorption activated carbon box for VOCs according to claim 1, wherein a shutter is arranged at the air inlet of the support plate for guiding the flow, and a steel grating is arranged at the air outlet of the support plate.
6. A VOCs adsorption and desorption activated carbon tank as claimed in claim 1, wherein the two activated carbon layers are honeycomb activated carbon, the specification of the honeycomb activated carbon single block is 100 x 100mm, and the thicknesses of the two activated carbon layers are the same and are not more than 400 mm.
7. A VOCs adsorption and desorption activated carbon box according to claim 6, wherein a horizontal plate is arranged as a support every 300mm of height when the honeycomb activated carbon is filled.
8. The adsorption and desorption activated carbon box for VOCs according to claim 6, wherein the inner side and the outer side of the two layers of activated carbon layers are both provided with stainless steel nets for fixation, the stainless steel nets on the inner side and the outer side of the activated carbon layers are detachable, and the aperture of the stainless steel nets is 5-30 mm.
9. A VOCs adsorption and desorption activated carbon box as claimed in claim 1, wherein said access door is located at the side of said activated carbon box and perpendicular to the direction of said activated carbon layers, and the width of said access door is not larger than the distance between said two activated carbon layers.
10. The adsorption and desorption activated carbon box for VOCs according to claim 9, wherein the access door is an inner steel plate and an outer steel plate, and heat insulation cotton is filled between the inner steel plate and the outer steel plate.
CN201811118052.3A 2018-09-26 2018-09-26 VOCs adsorbs desorption active carbon case Pending CN110947277A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811118052.3A CN110947277A (en) 2018-09-26 2018-09-26 VOCs adsorbs desorption active carbon case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811118052.3A CN110947277A (en) 2018-09-26 2018-09-26 VOCs adsorbs desorption active carbon case

Publications (1)

Publication Number Publication Date
CN110947277A true CN110947277A (en) 2020-04-03

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ID=69962233

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811118052.3A Pending CN110947277A (en) 2018-09-26 2018-09-26 VOCs adsorbs desorption active carbon case

Country Status (1)

Country Link
CN (1) CN110947277A (en)

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