CN112044236A - Organic waste gas treatment system and method based on zeolite rotating wheel - Google Patents
Organic waste gas treatment system and method based on zeolite rotating wheel Download PDFInfo
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- CN112044236A CN112044236A CN202010965486.8A CN202010965486A CN112044236A CN 112044236 A CN112044236 A CN 112044236A CN 202010965486 A CN202010965486 A CN 202010965486A CN 112044236 A CN112044236 A CN 112044236A
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- 239000007789 gas Substances 0.000 title claims abstract description 111
- 229910021536 Zeolite Inorganic materials 0.000 title claims abstract description 90
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 239000010457 zeolite Substances 0.000 title claims abstract description 90
- 239000010815 organic waste Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000003795 desorption Methods 0.000 claims abstract description 78
- 238000001816 cooling Methods 0.000 claims abstract description 51
- 238000007084 catalytic combustion reaction Methods 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000000746 purification Methods 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 9
- 238000010926 purge Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 5
- 238000005485 electric heating Methods 0.000 claims description 5
- 239000002808 molecular sieve Substances 0.000 claims description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 238000001179 sorption measurement Methods 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000001914 filtration Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000012855 volatile organic compound Substances 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
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- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
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- 230000001172 regenerating effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 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
- B01D53/06—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 moving adsorbents, e.g. rotating beds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2202/00—Combustion
- F23G2202/60—Combustion in a catalytic combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses an organic waste gas treatment system and method based on a zeolite rotating wheel, wherein the treatment system comprises the zeolite rotating wheel, a heater, a catalytic combustion device and a preheater; the zeolite rotating wheel is provided with a desorption area and a cooling area, and a desorption inlet and a desorption outlet are arranged at the position opposite to the desorption area; the desorption inlet is connected with the heater through a pipeline, and the desorption outlet is connected with an air inlet of the catalytic combustion device through a pipeline; the exhaust port of the catalytic combustion device is connected with the preheater, the preheater is connected with the cooling zone through a pipeline, so that the combusted gas is subjected to heat exchange and cooling in the preheater and the cooled gas is introduced into the cooling zone; and the preheater is connected with the heater through a pipeline to provide heat for the heater, so that the energy consumption in the desorption process is reduced.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to an organic waste gas treatment system and method based on a zeolite rotating wheel.
Background
At present, with the continuous development of industry, the discharge amount of VOCs is continuously increased while economic benefits are brought to the society, and the ecological environment and the health of human beings are seriously threatened. The VOCs waste gas is a volatile organic compound, and the formation of the VOCs waste gas mainly comes from road mobile source tail gas, home decoration coating, petrochemical industry, packaging printing and the like.
However, in the case of activated carbon adsorption, the activated carbon needs to be replaced periodically to ensure the adsorption effect, which results in high operation cost of activated carbon adsorption equipment and time and labor waste during each replacement; if the saturated activated carbon is desorbed, the purification efficiency can be reduced more quickly along with the increase of the desorption times, so that the service life of the activated carbon adsorption is short, and the purification efficiency is low; in addition, the energy consumption required in the desorption process is more, and the purposes of energy conservation and emission reduction cannot be achieved.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the objectives of the present invention is to provide an organic waste gas treatment system based on a zeolite wheel, which can improve the service life of the organic waste gas treatment system and reduce the energy consumption in the desorption process.
The invention also aims to provide an organic waste gas treatment method based on the zeolite rotating wheel.
One of the purposes of the invention is realized by adopting the following technical scheme:
an organic waste gas treatment system based on a zeolite rotating wheel comprises the zeolite rotating wheel, a heater, a catalytic combustion device and a preheater; the zeolite rotating wheel is provided with a desorption area and a cooling area, and a desorption inlet and a desorption outlet are arranged at the position opposite to the desorption area; the desorption inlet is connected with the heater through a pipeline, and the desorption outlet is connected with an air inlet of the catalytic combustion device through a pipeline; the exhaust port of the catalytic combustion device is connected with the preheater, the preheater is connected with the cooling zone through a pipeline, so that the combusted gas is subjected to heat exchange and cooling in the preheater and the cooled gas is introduced into the cooling zone; and the preheater is connected with the heater through a pipeline to provide heat for the heater.
Further, the zeolite rotating wheel comprises a machine body, a rotating wheel main body and a driving device, wherein the rotating wheel main body is connected into the machine body through a rotating shaft, and the driving device is linked with the rotating main body to drive the rotating main body to rotate around the rotating shaft; the top of the machine body is provided with the desorption inlet and the desorption outlet, and orthographic projections of the desorption inlet and the desorption outlet on the horizontal plane are respectively positioned at the left side and the right side of the rotating wheel main body; the region through which gas enters from the desorption inlet and is discharged from the desorption outlet is the desorption region of the zeolite wheel.
Furthermore, a purification inlet and a purification outlet are arranged on the machine body opposite to the rotating wheel main body, and the area through which gas enters from the purification inlet and is discharged from the purification outlet is the purification area of the zeolite rotating wheel; and a cooling port is arranged at the top of the machine body, and the area opposite to the cooling port is the cooling area.
Furthermore, the runner main body comprises three wheel cores which are sequentially arranged, the rotating speed of the wheel core positioned in the middle is less than that of the other two wheel cores, and the rotating direction of the wheel core positioned in the middle is opposite to that of the other two wheel cores.
Furthermore, each wheel core is provided with a plurality of detachable zeolite modules, each zeolite module is internally provided with grid discs with different densities, and the grid discs are filled with zeolite molecular sieves for purifying organic waste gas; the grid discs of the second wheel core are distributed more densely than those of the first wheel core and the third wheel core.
Furthermore, a metal heat exchange medium is arranged in the preheater, and cold and hot fluids are respectively arranged on two sides of the metal heat exchange medium; wherein, the metal heat exchange medium is designed into a bending structure.
Furthermore, a first temperature measuring element is arranged on a pipeline connecting the preheater and the heater, and the first temperature measuring element is in signal communication with the heater so as to control the electric heating power of the heater according to the gas temperature.
Furthermore, a second temperature measuring element and a control valve are arranged on a pipeline of the preheater connected with the cooling area, and the second temperature measuring element is in signal communication with the control valve so as to control the opening angle of the control valve according to the gas temperature.
Furthermore, a fire-retardant dust remover is arranged on a pipeline connected with an air inlet of the catalytic combustion device, and an explosion-proof device is arranged at the top of the catalytic combustion device.
The second purpose of the invention is realized by adopting the following technical scheme:
the organic waste gas treatment method based on the zeolite rotating wheel is applied to the organic waste gas treatment system based on the zeolite rotating wheel, and comprises the following steps:
step S1: introducing organic waste gas into the purification area of the zeolite rotating wheel for purification, and simultaneously heating the desorption area of the zeolite rotating wheel by the heater to desorb a zeolite module positioned in the desorption area in the zeolite rotating wheel;
step S2: gas generated in the desorption process of the zeolite rotating wheel enters the catalytic combustion device through a pipeline to be combusted;
step S3: introducing the combusted gas into the preheater, carrying out heat exchange cooling on the combusted gas by the preheater, and introducing the cooled gas into a cooling zone of the zeolite rotating wheel; and the preheater sends the heat absorbed in the heat exchange cooling process to the heater for heat supplement, and returns to the step S1 until the desorption process is finished.
Compared with the prior art, the invention has the beneficial effects that:
the zeolite rotating wheel is used for purifying the organic waste gas, so that the service life of the zeolite rotating wheel is longer than that of active carbon adsorption; the heater is used for providing heat for the desorption area of the zeolite rotating wheel for desorption, gas generated in the desorption process is introduced into the catalytic combustion device for combustion, and heat of high-temperature gas generated after combustion is supplemented into the heater, so that energy consumption can be recycled, the electric heating power of the heater is reduced, and the effects of energy conservation and emission reduction are achieved.
Drawings
FIG. 1 is a block diagram of an organic waste gas treatment system according to a first embodiment of the present invention;
FIG. 2 is a schematic side view of a zeolite wheel according to one embodiment of the present invention;
fig. 3 is a schematic top view of a zeolite wheel according to an embodiment of the present invention.
In the figure: 1. a zeolite wheel; 11. a desorption zone; 111. a desorption inlet; 112. a desorption outlet; 12. a purification zone; 121. a purge inlet; 122. a purified outlet; 13. a cooling zone; 131. a cooling port; 14. a runner body; 15. a drive device; 2. a heater; 3. a catalytic combustion device; 4. a preheater.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
Example one
As shown in fig. 1, the present embodiment provides an organic waste gas treatment system based on a zeolite wheel 1, which includes a zeolite wheel 1, a heater 2, a catalytic combustion device 3 and a preheater 4, wherein a plurality of devices cooperate with each other to achieve the purpose of organic waste gas purification.
As shown in fig. 2 and 3, the zeolite wheel 1 includes a machine body, a wheel main body 14 and a driving device 15, wherein the wheel main body 14 is connected in the machine body through a rotating shaft, and the driving device 15 is linked with the rotating main body to drive the rotating main body to rotate around the rotating shaft; the driving device 15 may be a motor and a transmission belt, the transmission belt is sleeved outside the rotating main body, and the motor drives the transmission belt to rotate and simultaneously drive the rotating main body to rotate around the rotating shaft.
A purification area 12, a desorption area 11 and a cooling area 13 are divided in the zeolite rotating wheel 1, the desorption inlet 111 and the desorption outlet 112 are arranged at the top of the machine body, and orthographic projections of the desorption inlet 111 and the desorption outlet 112 on the horizontal plane are respectively positioned at the left side and the right side of the rotating wheel main body 14; the desorption zone 11 of the zeolite rotor 1 is defined as a region through which gas enters from the desorption inlet 111, passes through the rotor body 14, and is discharged from the desorption outlet 112. And a purification inlet 121 and a purification outlet 122 are arranged on the machine body opposite to the rotating wheel main body 14, and the region through which gas enters from the purification inlet 121 and is discharged from the purification outlet 122 is the purification region 12 of the zeolite rotating wheel 1. A cooling port 131 is arranged at the top of the machine body, the cooling port 131 is not overlapped with the desorption inlet 111 and the desorption outlet 112, and the region right below the cooling port 131 is the cooling zone 13 of the zeolite rotating wheel 1.
When the organic waste gas is required to be purified, the organic waste gas is introduced from the purification inlet 121, the purification effect is completed when the organic waste gas passes through the wheel main body 14, and the purified gas is discharged from the purification outlet 122, and the gas can be directly discharged into the atmosphere. The rotation of the rotating wheel main body 14 can make the organic waste gas uniformly contact with the filtering material in the rotating wheel main body 14, so that the adsorption efficiency of the zeolite rotating wheel 1 on the VOC in the original waste gas is more than or equal to 90%.
In this embodiment, the rotating wheel main body 14 includes a plurality of wheel cores, and a rotating shaft penetrates through central axis positions of the plurality of wheel cores, so that the plurality of wheel cores can rotate coaxially; in this embodiment, be equipped with three wheel core, three wheel core all is equipped with a plurality of detachable zeolite modules, when arbitrary one zeolite module of arbitrary one wheel core breaks down, can change local zeolite module. Grid discs with different distribution queues are arranged in each zeolite module, and zeolite molecular sieves capable of purifying organic waste gas are filled in the grid discs; each wheel core is driven to rotate by an independent driving device 15, and meanwhile, the rotating speeds and the rotating speeds of the three wheel cores are different.
The three wheel cores that arrange in proper order are first wheel core, second wheel core and third wheel core respectively, in this embodiment, the rotational speed of second wheel core will be less than the rotational speed of first wheel core and third wheel core, wherein, the degree of concentration that the net dish of second wheel core distributes will be greater than the degree of concentration that net dish distributes in first wheel core and third wheel core, simultaneously, ensure the rotation direction of second wheel core and the rotation direction of first wheel core, third wheel core are opposite, when making organic waste gas get into from first wheel core direction, organic waste gas that net dish distribution degree of concentration is less relatively can evenly contact with the zeolite molecular sieve in all net dishes on first wheel core under the fast rotation effect, the purification burden of reducible net dish in this process alone can also purify simultaneously and filter organic waste gas for the first time. The gas passing through the first wheel core reaches the second wheel core, the rotating direction of the second wheel core is opposite to that of the first wheel core, so that the gas output from the first wheel core can be disturbed by the rotating trend of the second wheel core, the gas can be dispersedly in contact with the grid disc on the second wheel core for purification, and in addition, the rotating speed of the second wheel core is relatively slow, and the grid disc distribution density is relatively high, so that the gas can be fully in contact with the zeolite molecular sieve on any grid disc when passing through the second wheel core, and the gas purification degree is further improved; when the gas is introduced into the third wheel core, the rotating speed of the third wheel core is higher than that of the second wheel core, so that the gas is quickly discharged under the driving of the gas flow driven by the rotation of the third wheel core after being output from the second wheel core, the gas is prevented from staying in the zeolite wheel 1, the gas can be quickly purified again during the discharge period after passing through the third wheel core, the discharge of part of the unpurified gas is reduced, and the efficiency and the quality of gas purification are improved.
The desorption zone is also performing the desorption process while the zeolite wheel 1 is being cleaned. The desorption inlet 111 of the zeolite rotating wheel 1 is connected with the heater 2 through a pipeline, enough heat is provided for the saturated filtering materials to be desorbed in the desorption area 11 of the zeolite rotating wheel 1 through the heater 2, and in the rotating process of the rotating wheel main body 14, the filtering materials in the rotating wheel main body 14 can be subjected to a desorption process through the desorption area 11, so that a comprehensive desorption effect is achieved. The heater 2 can introduce high temperature of more than or equal to 280 ℃ into the zeolite rotating wheel 1, so that the zeolite rotating wheel 1 automatically enters a high-temperature purging mode, the desorption efficiency can be improved, and a good desorption effect is achieved on organic matters difficult to desorb.
The filtering material can drop impurities out of the filtering material in the desorption process, and can generate concentrated gas in the desorption process, so the desorption outlet 112 of the zeolite rotating wheel 1 is connected with the gas inlet of the catalytic combustion device 3 through a pipeline, and the concentrated gas is introduced into the catalytic combustion device 3 for combustion so as to carry out oxidative decomposition on the concentrated gas.
The catalytic combustion device 3 comprises a preheating chamber and a catalytic bed, the preheating chamber can be connected with a heat exchanger, and the heat exchanger can obtain heat from the catalytic combustion device 3 and also can obtain heat from the heater 2; the concentrated gas is preheated by the heat exchanger to increase the temperature of the concentrated gas, and then the concentrated gas is introduced into a catalytic bed for oxidation combustion.
And a fire-retardant dust remover is arranged on a pipeline connected with an air inlet of the catalytic combustion device 3, and an explosion-proof device is arranged at the top of the catalytic combustion device 3 so as to improve the safety of the catalytic combustion device 3.
The exhaust port of the catalytic combustion device 3 is connected with the preheater 4, and the preheater 4 is connected with the cooling zone 13 of the zeolite rotating wheel 1 through a pipeline, so that high-temperature gas combusted in the catalytic combustion device 3 is subjected to heat exchange cooling in the preheater 4 to reduce the temperature of the gas; and introducing the cooled gas into the cooling zone 13 of the zeolite rotating wheel 1, cooling the cooling zone 13 of the zeolite rotating wheel 1 to recover the purification capacity of the zeolite rotating wheel 1, and cooling the filtering materials in the rotating wheel main body 14 through the cooling zone 13 in the rotating process of the rotating wheel main body 14 so as to achieve a comprehensive cooling effect.
The preheater 4 is connected with the heater 2 through a pipeline and can also be connected with the heat exchanger, and the preheater 4 absorbs the gas temperature and sends the gas temperature to the heater 2 or the heat exchanger when performing heat exchange cooling on high-temperature gas, so as to provide heat for the heater 2 or the heat exchanger and reduce the electric heating power in the heater 2, thereby realizing the energy-saving effect.
A metal heat exchange medium is arranged in the preheater 4, in this embodiment, an SUS304 steel plate can be used as the heat exchange medium, cold and hot fluids are respectively arranged on two sides of the metal heat exchange medium, the cold and hot fluids exchange heat in a cross flow manner, and heat of high-temperature gas transfers heat to low-temperature gas through the steel plate, so as to achieve the purpose of recovering energy; meanwhile, the metal heat exchange medium can also be arranged into a bent structure, the flow direction of gas is changed through the baffle plate in the heat exchanger, and the heat exchange flow and the contact time of the gas are increased.
The pipeline that the preheater 4 links to each other with the heater 2 is equipped with first temperature measurement element, first temperature measurement element is through well accuse module with the heater 2 signal is linked together, first temperature measurement element detects the gas temperature that the preheater 4 sent to the heater 2, well accuse module is according to gas temperature control the electric heating power of heater 2.
And a second temperature measuring element and a control valve are arranged on a pipeline connecting the preheater 4 and the cooling zone 13, the second temperature measuring element is in signal communication with the control valve through a central control module, the second temperature measuring element detects the temperature of the gas sent to the cooling zone 13 by the preheater 4, and the central control module controls the opening angle of the control valve according to the temperature of the gas, so that the high-temperature gas is introduced into the cooling zone 13 after being subjected to sufficient heat exchange and cooling in the preheater 4.
Example two
The present embodiment provides a method for treating organic waste gas based on a zeolite wheel 1, which is applied to the organic waste gas treatment system based on a zeolite wheel 1 according to the first embodiment, and includes:
step S1: introducing organic waste gas into a purification area 12 of the zeolite rotating wheel 1 for purification, and simultaneously, starting the heater 2 to heat a desorption area 11 of the zeolite rotating wheel 1 to perform a desorption process on the zeolite rotating wheel 1;
step S2: gas generated in the desorption process of the zeolite rotating wheel 1 enters the catalytic combustion device 3 through a pipeline for combustion;
step S3: introducing high-temperature gas after combustion into the preheater 4, wherein the preheater 4 carries out heat exchange cooling on the gas after combustion, and the cooled gas is introduced into the cooling zone 13 of the zeolite rotating wheel 1 to cool the zeolite rotating wheel 1 so as to recover the adsorption and purification capacity of the zeolite rotating wheel 1; the preheater 4 transmits the absorbed heat in the heat exchange and cooling process to the heater 2 for heat supplement so as to reduce the motor thermal power of the heater 2 and realize the energy-saving effect; and returns to step S1 to start the loop of steps S1 to S3 until the desorption process is finished.
The pretreated waste gas respectively enters the purification areas 12 of the respective rotating wheels for adsorption, the waste gas reaching the standard is discharged through a chimney, the organic waste gas VOC adsorbed in the concentrated rotating wheels is desorbed in the desorption area 11 through high-temperature air treatment, and the gas is concentrated to 15-25 times. The flow of the concentration fan is 1/20-1/15 of the exhaust air volume. The zeolite rotating wheel 1 is cooled in the cooling zone 13, the tail gas passing through the cooling zone 13 is heated, and the tail gas passes through the regenerative heater to be used as desorption gas, so that the energy-saving effect is achieved.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. An organic waste gas treatment system based on a zeolite rotating wheel is characterized by comprising the zeolite rotating wheel, a heater, a catalytic combustion device and a preheater; the zeolite rotating wheel is provided with a desorption area and a cooling area, and a desorption inlet and a desorption outlet are arranged at the position opposite to the desorption area; the desorption inlet is connected with the heater through a pipeline, and the desorption outlet is connected with an air inlet of the catalytic combustion device through a pipeline; the exhaust port of the catalytic combustion device is connected with the preheater, the preheater is connected with the cooling zone through a pipeline, so that the combusted gas is subjected to heat exchange and cooling in the preheater and the cooled gas is introduced into the cooling zone; and the preheater is connected with the heater through a pipeline to provide heat for the heater.
2. The zeolite wheel-based organic waste gas treatment system according to claim 1, wherein the zeolite wheel comprises a body, a wheel body and a driving device, the wheel body is connected in the body through a rotating shaft, and the driving device is linked with the rotating body to drive the rotating body to rotate around the rotating shaft; the top of the machine body is provided with the desorption inlet and the desorption outlet, and orthographic projections of the desorption inlet and the desorption outlet on the horizontal plane are respectively positioned at the left side and the right side of the rotating wheel main body; the region through which gas enters from the desorption inlet and is discharged from the desorption outlet is the desorption region of the zeolite wheel.
3. The zeolite wheel-based organic waste gas treatment system according to claim 2, wherein a purge inlet and a purge outlet are provided on the body facing the wheel main body, and a region through which gas enters from the purge inlet and exits from the purge outlet is the purge region of the zeolite wheel; and a cooling port is arranged at the top of the machine body, and the area opposite to the cooling port is the cooling area.
4. The organic waste gas treatment system based on a zeolite wheel according to claim 3, wherein the wheel body comprises three wheel cores arranged in sequence, the rotation speed of the wheel core in the middle is lower than that of the other two wheel cores, and the rotation direction of the wheel core in the middle is opposite to that of the other two wheel cores.
5. The organic waste gas treatment system based on the zeolite rotating wheel as claimed in claim 4, wherein each wheel core is provided with a plurality of detachable zeolite modules, and each zeolite module is provided with grid discs with different densities, and the grid discs are filled with zeolite molecular sieves for purifying organic waste gas; the grid discs of the second wheel core are distributed more densely than those of the first wheel core and the third wheel core.
6. The zeolite wheel-based organic waste gas treatment system of claim 1, wherein the preheater is provided with a metal heat exchange medium therein, and cold and hot fluids are respectively provided on both sides of the metal heat exchange medium; wherein, the metal heat exchange medium is designed into a bending structure.
7. The zeolite wheel-based organic waste gas treatment system as claimed in claim 6, wherein a first temperature measuring element is provided on a pipe connecting the preheater and the heater, and the first temperature measuring element is in signal communication with the heater to control the electric heating power of the heater according to the gas temperature.
8. The system of claim 7, wherein a second temperature measuring element and a control valve are disposed on a pipe connecting the preheater and the cooling zone, and the second temperature measuring element is in signal communication with the control valve to control an opening angle of the control valve according to a gas temperature.
9. The organic waste gas treatment system based on the zeolite wheel as claimed in claim 1, wherein a fire-retardant dust remover is provided on a pipe connected to an air inlet of the catalytic combustion unit, and an explosion-proof device is provided on a top of the catalytic combustion unit.
10. An organic waste gas treatment method applied to the organic waste gas treatment system based on the zeolite wheel according to any one of claims 1 to 9, comprising:
step S1: introducing organic waste gas into the purification area of the zeolite rotating wheel for purification, and simultaneously heating the desorption area of the zeolite rotating wheel by the heater to desorb a zeolite module positioned in the desorption area in the zeolite rotating wheel;
step S2: gas generated in the desorption process of the zeolite rotating wheel enters the catalytic combustion device through a pipeline to be combusted;
step S3: introducing the combusted gas into the preheater, carrying out heat exchange cooling on the combusted gas by the preheater, and introducing the cooled gas into a cooling zone of the zeolite rotating wheel; and the preheater sends the heat absorbed in the heat exchange cooling process to the heater for heat supplement, and returns to the step S1 until the desorption process is finished.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI790586B (en) * | 2021-03-31 | 2023-01-21 | 日月光半導體製造股份有限公司 | Module and method for organic waste gas treatment |
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