CN115155308B - VOCs exhaust-gas treatment system - Google Patents
VOCs exhaust-gas treatment system Download PDFInfo
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- CN115155308B CN115155308B CN202210891371.8A CN202210891371A CN115155308B CN 115155308 B CN115155308 B CN 115155308B CN 202210891371 A CN202210891371 A CN 202210891371A CN 115155308 B CN115155308 B CN 115155308B
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/864—Removing carbon monoxide or hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0012—In-line filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
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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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- 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
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—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
- B01D2255/00—Catalysts
- B01D2255/40—Mixed oxides
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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
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention belongs to the field of waste gas treatment equipment, and particularly relates to a VOCs waste gas treatment system. The system is used for handling VOCs waste gas, specifically includes: leading fan, leading processing case and zeolite enrichment facility, waste gas enter into the leading processing case that is equipped with dust filter, activated carbon filter, desicator and catalytic unit under leading fan drive, zeolite enrichment facility includes zeolite runner and drive arrangement, and drive arrangement passes through the drive belt and drives the rotation of zeolite runner, the zeolite runner divide into adsorption zone, desorption district and cooling space, waste gas behind leading processing case processing discharges behind the zeolite runner adsorption zone, the desorption district leads to high temperature gas, cooling space and leads to the cooling gas. The system can fully and effectively carry out cyclic treatment on the VOCs waste gas, achieves the purification efficiency of more than 99.5 percent, greatly reduces energy consumption, improves the pollutant combustion purification effect, and fully converts the VOCs waste gas into clean gas components.
Description
Technical Field
The invention belongs to the field of waste gas treatment equipment, and particularly relates to a VOCs waste gas treatment system.
Background
VOCs waste gases are a very common type of industrial waste gas, the main constituents of which include hydrocarbons, halogenated hydrocarbons, oxygen hydrocarbons and nitrogen hydrocarbons. Specifically, it includes benzene series, organic chlorides, freon series, organic ketones, amines, alcohols, ethers, esters, petroleum hydrocarbon compounds, and the like.
As industrial waste gas, the VOCs industrial waste gas in actual emission also contains a large amount of combustible components such as carbon monoxide and clean components such as carbon dioxide, so that the VOCs emission technology is always the core of progress if the clean components are rapidly and effectively discharged and the pollutant components are treated and then discharged.
For this purpose, zeolite rotary-RTO combustion systems are known, which achieve a dual-cycle process discharge by means of cleaning and combustion. However, in actual use, the direct-exhaust efficiency of the actual zeolite runner-RTO combustion system is only about 75 to 80%, and the gas discharged after combustion has a large amount of pollutant components due to insufficient combustion.
Disclosure of Invention
The invention provides a VOCs waste gas treatment system, aiming at solving the problems that the prior zeolite rotating wheel-RTO combustion system has relatively limited VOCs waste gas treatment effect, low efficiency, poor effect, high energy consumption and the like.
The invention aims to:
1. the treatment efficiency and treatment effect on VOCs waste gas are improved;
2. the energy consumption of the waste gas treatment system is greatly reduced;
3. the improved double-circulation system is a single-circulation system, so that the waste gas can be fully treated and uniformly reach the target emission standard.
In order to achieve the purpose, the invention adopts the following technical scheme.
A VOCs waste gas treatment system, which comprises a waste gas treatment system,
the system is used for handling VOCs waste gas, specifically includes:
the device comprises a front-mounted fan, a front-mounted treatment box and a zeolite concentration device;
the VOCs waste gas enters a pre-treatment box under the driving of a pre-fan, a dust filter, an activated carbon filter, a dryer and a catalytic device are arranged in the pre-treatment box, and the catalytic device is filled with a catalytic material;
the VOCs waste gas sequentially passes through a dust filter, an activated carbon filter and a dryer, and then CO in the VOCs waste gas is subjected to catalytic oxidation in a catalytic device;
the zeolite concentration device comprises a zeolite rotating wheel and a driving device, and the driving device drives the zeolite rotating wheel to rotate through a driving belt;
the zeolite runner divide into adsorption zone, desorption district and cooling zone according to its direction of rotation in proper order, the VOCs waste gas after leading processing box handles discharges after adsorbing through the adsorption zone of zeolite runner, high temperature gas is led to in the desorption district, cooling gas is led to in the cooling zone.
As a preference, the first and second liquid crystal compositions are,
the catalytic material is copper cerium oxide particles;
the zeolite used in the zeolite rotating wheel adopts zeolite with LTA structure.
As a preference, the first and second liquid crystal compositions are,
the zeolite used in the zeolite runner is itq-26 zeolite and/or itq-29 zeolite and/or itq-33 zeolite.
As a preference, the first and second liquid crystal compositions are,
the VOCs waste gas treatment system also comprises a post-separation device, a heat exchange box and a heat exchange combustion box;
the VOCs waste gas is treated by a zeolite concentration device and then treated by a separation device to adsorb VOCs components and then discharged;
the heat exchange box is provided with a low-temperature area and a high-temperature area which are mutually and airtightly isolated, the heat exchange combustion box is provided with a combustion chamber and a heat exchange chamber which are mutually and airtightly isolated, air is preheated in the low-temperature area of the heat exchange box and then is led into the heat exchange chamber of the heat exchange combustion chamber for heating, and high-temperature air is formed after heating for desorption treatment in a desorption area;
form the leading-in burning to the heat transfer burning box of one-level VOCs concentrated gas after the desorption district desorption, form high temperature clean gas after the burning and lead-in to the separator in be used for the adsorbed VOCs composition of desorption separator to form second grade VOCs concentrated gas, the leading-in high-temperature region to the heat exchange box of second grade VOCs concentrated gas for the air to the low temperature zone heats up and preheats.
As a preference, the first and second liquid crystal compositions are,
the pre-processing box is also provided with a secondary lead-in opening, and the secondary lead-in opening is arranged between the dust filter and the activated carbon filter;
and the secondary VOCs concentrated gas is guided to the zeolite rotating wheel after being guided out from the high-temperature zone of the heat exchange box and is used for cooling the cooling zone, is guided into the pre-treatment box through the secondary introducing port after passing through the cooling zone, and is mixed with VOCs waste gas filtered by the dust filter in the pre-treatment box.
As a preference, the first and second liquid crystal compositions are,
the separation device includes:
the device comprises a shell, a driving motor and a rotating body;
the shell is provided with a cylindrical inner cavity and an upper part and a lower part, a first air inlet and a first air outlet are arranged at the head end and the tail end of the upper part, and a second air inlet and a second air outlet are arranged at the head end and the tail end of the lower part;
a driving motor is embedded in the side wall of the first air inlet;
the rotating body comprises a rotating shaft and a closed rotating shell which is fixed on the rotating shaft and matched with the cylindrical inner cavity in the shell, the head end and the tail end of the closed rotating shell are plate-shaped or net-shaped supporting structures which can be used for ventilation, and filtering materials are filled in the closed rotating shell.
As a matter of preference,
the filter material is itq-26 zeolite and/or itq-29 zeolite and/or itq-33 zeolite.
As a preference, the first and second liquid crystal compositions are,
a plurality of supporting ribs are uniformly arranged in the closed type rotating shell around the circumferential direction of the rotating shaft;
support the rib and connect pivot and closed rotatory shells inner wall, separate closed rotatory shells inner wall for a plurality of mutual airtight separation's cavity, all be equipped with the spout on every supports the rib, the embedded slider that is equipped with of spout and slider and chute wall carry out elastic connection through the elastic component, be equipped with airtight elastic diaphragm between two sliders in same cavity, airtight elastic diaphragm separates each cavity of closed rotatory shells, forms the filling area in one side towards the pivot, and filtering material fills in the filling area.
The invention has the beneficial effects that:
according to the invention, VOCs waste gas is subjected to full and effective circulation treatment in a single and large circulation mode, the purification efficiency is more than 99.5%, meanwhile, heat generated in the treatment process is effectively distributed and used and converted, the energy consumption is greatly reduced, and the pollutant combustion purification effect is improved in a circulation improvement mode, so that the pollutant is fully converted into clean gas components.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a schematic structural view of embodiment 2 of the present invention;
FIG. 3 is a schematic view of the structure of the separation apparatus of the present invention;
FIG. 4 is a schematic cross-sectional view of a rotating body in the separation apparatus of the present invention.
In the figure: 100-preposition fan, 200-preposition processing box, 201-dust filter, 202-activated carbon filter, 203-dryer, 204-catalytic device, 205-secondary leading-in port, 300-zeolite concentration device, 301-zeolite rotating wheel, 3011-adsorption area, 3012-desorption area, 3013-cooling area, 302-driving device, 303-driving belt, 400-separation device, 401-shell, 4011-first air inlet, 4012-first air outlet, 4013-second air outlet, 4014-second air inlet, 4015-caulking groove, 402-driving motor, 403-rotator, 403 a-purification area, 403 b-regeneration area, 4031-rotating shaft, 4032-closed rotating shell, 4033-supporting rib, 40331-sliding groove, 40332-sliding block, 33-elastic piece, 4034-airtight elastic membrane, 4035-zeolite granule, 500-postposition fan, 403600-chimney, 700-heat exchange fan, 800-801-temperature area, 802-1003-low-temperature area, 4034-airtight elastic membrane, 4035-zeolite granule, 1002-heat exchange chamber, 1001-heat exchange chamber, and heat transfer chamber.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and the attached drawing figures. Those skilled in the art will be able to implement the invention based on these teachings. Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Unless otherwise specified, the raw materials used in the examples of the present invention are all commercially available or available to those skilled in the art; unless otherwise specified, the methods used in the examples of the present invention are all those known to those skilled in the art.
Example 1
A system for treating exhaust gases from VOCs as shown in fig. 1, comprising:
a pre-blower 100, a pre-treatment tank 200 and a zeolite concentration device 300;
the inlet end of the front fan 100 is communicated with a VOCs waste gas generating source, and the outlet end of the front fan is connected to the inlet end of the front processing box 200;
the VOCs waste gas is driven by the front-end fan 100 to enter the front-end processing box 200, and a dust filter 201, an activated carbon filter 202, a dryer 203 and a catalytic device 204 are sequentially arranged in the front-end processing box 200 from an inlet end to an outlet end;
the dust filter 201 adopts a conventional EMI aluminum screen dust filtering ventilation board for removing granular impurities, the activated carbon filter 202 is filled with activated carbon for primary filtering, for the technical scheme of the invention, the drier 203 cannot adopt a drier 203 filled with common substances such as silica and/or diatomite, and the drier 203 is filled with moisture-absorbing heating substances such as quicklime;
the catalytic device 204 is filled with copper cerium oxide particles (Cu0.1Ce0.9O2-y or written as Cu (I) xCu (II) 0.1-xCe0.9O3.7-0.5 x) as a catalyst, and can be used for very effectively catalyzing and oxidizing carbon monoxide in the VOCs waste gas at the low temperature of 50-60 ℃ and releasing the latent heat of the carbon monoxide to heat the VOCs waste gas;
the zeolite concentration device 300 comprises a zeolite rotating wheel 301 and a driving device 302, wherein the driving device 302 drives the zeolite rotating wheel 301 to rotate through a transmission belt 303.
The zeolite rotating wheel 301 is sequentially divided into an adsorption area 3011, a desorption area 3012 and a cooling area 3013 according to the rotation direction, wherein the desorption area 3012 is also called as a regeneration area, the VOCs waste gas treated by the pre-treatment box 200 is conducted to the inlet end of the adsorption area 3011 of the zeolite rotating wheel 301, the adsorption area 3011 adsorbs pollutant components in the VOCs waste gas, and clean gas such as carbon dioxide is conveyed from the outlet end of the adsorption area 3011 to a discharge device such as a chimney 600 for discharge, while the volatile organic pollutants adsorbed in the adsorption area 3011 of the zeolite rotating wheel 301 rotate to the desorption area 3012 along with the zeolite rotating wheel 301, hot air flows into the desorption area 3012 from the inlet end of the desorption area 3012, and is desorbed under the driving of the hot air flow, and after desorption, highly concentrated volatile organic pollutants such as primary VOCs concentrated gas is formed, the primary VOCs concentrated gas is led out from the outlet end of the desorption area 3012 for combustion, and can be converted into clean gas such as water vapor and carbon dioxide for further discharge, and the cool air is introduced into the inlet end of the zeolite rotating wheel 3013 for cooling the zeolite 301.
However, although the adsorption efficiency of the VOCs components of the conventional zeolite rotating wheel 301 can reach 75 to 80%, the discharge of VOCs pollutants is greatly reduced, a certain amount of VOCs pollutants are still discharged into the atmosphere, and certain pollution is still provided.
However, through research, it is found that in the process of adsorbing the VOCs components by the zeolite rotating wheel 301, carbon dioxide in the VOCs waste gas is a factor that significantly affects the adsorption effect, and carbon dioxide in the VOCs components occupies a large number of adsorption vacancies in the zeolite rotating wheel 301, so that the adsorption region 3011 reaches a saturated state too early, and is limited by factors such as gas pressure drop, and the thickness of the zeolite rotating wheel 301 needs to be controlled, so that if the adsorption rate of the VOCs components is to be improved, it is a very effective means to avoid the carbon dioxide from occupying the adsorption vacancies.
In contrast, the zeolite used in the zeolite runner 301 of the present invention adopts zeolite with LTA structure to replace the conventional MFI zeolite runner 301, specifically, the present embodiment adopts itq-33 zeolite, that is, the technical solution of the present invention needs to adopt the LTA structure zeolite runner 301, and the present embodiment specifically adopts itq-33 zeolite runner 301.
The LTA structure zeolite including itq-33 zeolite has unique properties, carbon dioxide has strong temperature dependence, and can be effectively adsorbed under the low temperature condition, but can not be effectively adsorbed under the high temperature condition, the adsorption efficiency of itq-33 zeolite at the relatively high temperature (70 ℃) can be reduced to 35-45% of the normal temperature (22 ℃), and the adsorption efficiency of the itq-33 zeolite runner 301 to VOCs can be greatly improved to 85-95%.
In the process of treatment, VOCs waste gas passes through the preposed treatment box 200, wherein the dryer 203 and the catalytic device 204 can perform reaction temperature rise, generally the temperature can be raised to 85-95 ℃, the requirements of the itq-33 zeolite runner 301 in the invention on a temperature zone (about 70-105 ℃) for efficient adsorption of VOCs components and low adsorption of carbon dioxide are met, and the adsorption efficiency of the VOCs waste gas is greatly improved.
Example 2
Further, on the basis of example 1: the VOCs waste gas treatment system of the invention further comprises a post-separation device 400, a heat exchange tank 800 and a heat exchange combustion tank 1000 as shown in FIG. 2;
the separation device 400 is provided with a rear fan 500 matched with the separation device, the inlet end of the separation device 400 is connected with the outlet end of the adsorption region 3011 of the zeolite rotating wheel 301, the VOCs waste gas is adsorbed and purified by the adsorption region 3011 to form primary purified gas, the primary purified gas enters the separation device 400 and is adsorbed and separated again by the separation device 400, the VOCs components are further removed to form secondary purified gas, and the secondary purified gas is guided and conveyed to the chimney 600 to be discharged under the action of the rear fan 500;
the second-level VOCs concentrated gas further separated from the first-level purified gas in the separation device 400 enters the heat exchange box 800 under the action of the heat exchange fan 700;
as shown in fig. 2, the heat exchange box 800 is provided with a high temperature region 801 and a low temperature region 802, in the heat exchange box 800, the high temperature region 801 and the low temperature region 802 are isolated from each other and respectively introduce air flows, the air flow of the high temperature region 801 transfers heat to the low temperature region 802 by means of contact heat transfer, so as to realize cooling of the air flow of the high temperature region 801 and preheating and heating of the air flow of the low temperature region 802;
the secondary VOCs concentrated gas enters the high-temperature area 801 of the heat exchange box 800 from the inlet end of the high-temperature area 801 of the heat exchange box 800, is guided out from the outlet end of the high-temperature area 801 after heat exchange, is guided to the cooling area 3013 of the zeolite rotating wheel 301 after being cooled to cool the zeolite rotating wheel 301 and is pre-adsorbed on the zeolite rotating wheel 301 in a small amount, a secondary introducing port 205 is arranged on the corresponding pre-processing box 200, the secondary introducing port 205 is arranged between the dust filter 201 and the activated carbon filter 202, the secondary VOCs concentrated gas passing through the cooling area 3013 enters the pre-processing box 200 through the secondary introducing port 205, is mixed with VOCs waste gas filtered by the dust filter 201 and enters the circulation again for secondary adsorption purification;
the inlet end of the low temperature region 802 of the heat exchange box 800 is communicated with an air fan 900, the air fan 900 guides air into the low temperature region 802 from the inlet end of the low temperature region 802 of the heat exchange box 800, and the air is guided out from the outlet end of the low temperature region 802 to flow to the heat exchange combustion box 1000 after being heated by heat exchange;
the heat exchange combustion box 1000 comprises a combustion chamber 1001 and a heat exchange chamber 1002, the combustion chamber 1001 and the heat exchange chamber 1002 are hermetically isolated by a heat conduction metal plate 1003 and realize heat exchange, the combustion chamber 1001 is used for combusting and purifying concentrated primary VOCs gas to convert the concentrated VOCs gas into clean gas and generate heat, and the heat is supplied to the gas in the heat exchange chamber 1002 through the heat conduction metal plate 1003 to heat and preheat;
the medium-temperature hot air which flows under the drive of the air fan 900 and is preheated and heated by the heat exchange box 800 enters the heat exchange chamber 1002 from the inlet end of the heat exchange chamber 1002 of the heat exchange combustion box 1000, flows out from the outlet end of the heat exchange chamber 1002 after being heated to form high-temperature hot air of about 220-240 ℃, is guided and drained to the inlet end of the desorption region 3012 of the zeolite runner 301, and the pollutants of the VOCs adsorbed on the zeolite runner 301 are desorbed by the high-temperature hot air, so that the actually formed first-level VOCs concentrated gas contains rich oxygen.
In the conventional zeolite rotating wheel-RTO combustion system, the VOCs concentrated gas is directly ignited and combusted, but actually because the oxygen content in the VOCs concentrated gas is extremely low, the VOCs concentrated gas needs to be continuously ignited for naked flame and be independently supplied for combustion in a combustion chamber 1001, the leakage risk and the explosion risk exist, and certain potential safety hazards exist, in the technical scheme of the invention, the effective cyclic utilization of energy and the reasonable allocation of material components are realized, so that the air is firstly mixed with VOCs pollutants after being subjected to heat exchange preheating and combustion heat exchange temperature rise to form primary VOCs concentrated gas with high oxygen content, the primary VOCs concentrated gas can be continuously combusted only by being ignited once in a heat exchange combustion box 1000, the energy consumption is greatly saved, the VOCs components can be more thoroughly removed by combustion under the oxygen-enriched condition, and the formed clean gas is led out from the outlet end of the combustion chamber 1001 of the heat exchange combustion box 1000, the guide separation device 400 is used for separating the enriched VOCs components by the desorption separation device 400 to form second-level VOCs concentrated gas, the second-level VOCs concentrated gas is used for being mixed with the original VOCs waste gas which is only filtered by the dust filter 201 after being cooled by the cooling area 3013, thereby further realizing pre-heating, ensuring that the subsequent pre-heating process before the carbon monoxide catalysis and the VOCs enter the adsorption area 3011 is guaranteed, ensuring that good separation effect is realized, avoiding the adsorption vacancy in the adsorption area 3011 of the zeolite rotating wheel 301 from being occupied by carbon dioxide, firstly, air is preheated by the heat exchange box 800 and then guided to the heat exchange combustion box 1000, on one hand, the second-level VOCs concentrated gas can be cooled so that the second-level VOCs concentrated gas can be used for cooling the cooling area 3013 of the zeolite rotating wheel 301, on the other hand, the clean gas formed by combustion in the combustion chamber 1001 is prevented from being greatly deprived of heat by low-temperature air so that the subsequent desorption effect is weakened, the double high-efficiency of material circulation and heat circulation is realized, and the energy consumption is greatly saved.
Compared with the conventional zeolite rotating wheel-RTO combustion system, the VOCs waste gas treatment system adopts a single large circulation mode to replace the traditional double circulation mode, so that gas can be purified and utilized for multiple times in a single circulation, the continuous purification and discharge of VOCs waste gas are realized, the purification effect and the discharge efficiency are improved, the energy consumption is also saved, the material utilization rate is improved, and the waste gas treatment cost can be greatly reduced.
Example 3
Further, on the basis of example 2:
the separation device 400 used in the present invention is specifically shown in fig. 3, and specifically includes:
a housing 401, a drive motor 402, and a rotor 403;
the shell 401 is provided with a cylindrical inner cavity and an upper part and a lower part, a first air inlet 4011 and a first air outlet 4012 are arranged at the head end and the tail end of the upper part, and a second air inlet 4014 and a second air outlet 4013 are arranged at the head end and the tail end of the lower part;
the side wall of the first air inlet 4011 is provided with an embedded groove 4015, and a driving motor 402 is arranged in the front groove;
the swivel 403 includes a rotating shaft 4031 and a closed rotating housing 4032 fixed on the rotating shaft 4031 and adapted to the inner cylindrical cavity of the housing 401, the head and the tail of the closed rotating housing 4032 are plate-shaped or mesh-shaped support structures such as air vent plates and the like that can be used for ventilation, and specifically, the embodiment employs the air vent plates;
an even number of support ribs 4033 are uniformly arranged in the closed type rotating shell 4032 around the circumferential direction of the rotating shaft 4031.
As shown in fig. 4, the support rib 4033 connects the rotating shaft 4031 and the inner wall of the closed rotating housing 4032, so as to divide the inner wall of the closed rotating housing 4032 into a plurality of chambers separated from each other in an airtight manner, each of the two circumferential sides of the support rib 4033 is provided with a sliding groove 40331, a sliding block 40332 is embedded in the sliding groove 40331, the wall of the sliding block 40332 and the wall of the sliding groove 40331 are elastically connected through an elastic member 40333, the sliding block 40332 can restore to an initial position after moving under the action of the elastic member 40333 to restore, the initial position of the sliding block 40332 corresponds to the upper wall of the first gas inlet 4011, so that gas can be constrained to flow through a filling region when entering from the first gas inlet 4011, and for this embodiment, the initial position and the upper wall of the first gas inlet 4011 are correspondingly set in the middle of the support rib 4033.
An airtight elastic diaphragm 4034 is arranged between the two sliding blocks 40332 in the same chamber, the airtight elastic diaphragm 4034 separates the chambers of the closed rotating casing 4032, each chamber forms a filling area on one side facing the rotating shaft 4031 under the separation effect, and the filling area is filled with zeolite particles 4035.
In the packed region, zeolite particles 4035 are selected from itq-33 zeolite particles.
As shown in fig. 2, 3 and 4, when the enclosed rotary housing 4032 is operated, which can be regarded as a cleaning zone 403a at the upper half and a regeneration zone 403b at the lower half, the rotor 403 is continuously rotated under the action of the driving motor 402, and due to the upper and lower partitions and the structural characteristics of the rotor 403, during operation, the cleaning gas purified by the adsorption zone 3011 of the zeolite wheel 301 enters the rotor 403 from the first gas inlet 4011, at this time, the slider 40332 is reset, the zeolite particles 4035 are limited at a position close to the rotating shaft 4031, the cleaning gas flows through the filling zone, flows out from the first gas outlet 4012 after further adsorbing VOCs components, and flows out to the guide chimney 600, while along with the rotation of the rotor 403, as shown in fig. 4, when the cleaning gas is rotated to the lower portion of the cylindrical inner cavity of the housing 401, the slider 40332 moves away from the rotating shaft 4031 along the support ribs 4033 under the action of its own gravity and the gravity, so that the zeolite particles 4035 "centrifuge", flow into the second gas at high temperature, so that the adsorbed VOCs components 4035 and the gas flow out from the upper portion 4033, and then flows back to the upper portion 40333, and then flows out again after being desorbed from the upper portion.
In the above structure, the movable slider 40332 is provided to form a variable filling region to ensure that the zeolite particles 4035 can roll and stir and move inward and outward, which is a key to realize efficient purification and desorption, because the temperature required for the adsorption process is relatively low and the temperature required for the desorption process is relatively high, and if the zeolite particles 4035 are fully filled in the closed rotating housing 4032, although good adsorption or desorption effects can be realized, the adsorption and desorption effects cannot be obtained simultaneously, because the temperature of the zeolite particles 4035 is uncontrollable, in the separation device 400 of the present invention, the zeolite particles 4035 are attached to the inner wall of the closed rotating housing 4032 when the temperature is raised, the heat of the temperature is easily and rapidly conducted outward, so that excessive temperature rise is avoided, and meanwhile, the motion of rolling and stirring also enables the zeolite particles 4035 to be effectively cooled, so that a relatively effective temperature cycle is formed.
Under the cooperation of the structures, after the VOCs waste gas treatment system is operated in a trial mode by 15 d, the content of VOCs components in the exhaust gas is sampled and inspected for 20-30 times each day on average, the average value of VOCs in the exhaust gas is detected to be less than 0.1% during the trial operation, namely, the adsorption cleaning efficiency reaches more than 99.9%, and under the condition that the structures such as the sliding block 40332, the airtight elastic diaphragm 4034 and the like are not arranged in the closed rotating shell 4032, when zeolite particles 4035 are fully filled in each cavity, 3 d is operated in a trial mode, the content of VOCs in the exhaust gas is detected to be about 1.0-2.5% during the period, namely, the adsorption cleaning efficiency is about 97.5-99.0%, and the adsorption cleaning efficiency of the conventional zeolite runner-RTO combustion system is generally only 75-80%, so that a very remarkable lifting effect is generated.
And compared with the prior zeolite runner-RTO combustion system, the treatment efficiency of the VOCs waste gas is improved by about 11.6-13.2%, the material and energy consumption cost is reduced by more than 35%, and the system has great industrial practical value.
Claims (6)
1. A VOCs waste gas treatment system is characterized in that,
the system is used for handling VOCs waste gas, specifically includes:
the device comprises a front-mounted fan, a front-mounted treatment box and a zeolite concentration device;
the VOCs waste gas enters a pre-treatment box under the driving of a pre-fan, a dust filter, an activated carbon filter, a dryer and a catalytic device are arranged in the pre-treatment box, and the catalytic device is filled with a catalytic material;
the VOCs waste gas sequentially passes through a dust filter, an activated carbon filter and a dryer, and then CO in the VOCs waste gas is subjected to catalytic oxidation in a catalytic device;
the zeolite concentration device comprises a zeolite rotating wheel and a driving device, and the driving device drives the zeolite rotating wheel to rotate through a driving belt;
the zeolite rotating wheel is sequentially divided into an adsorption area, a desorption area and a cooling area according to the rotating direction of the zeolite rotating wheel, VOCs waste gas treated by the pre-treatment box is adsorbed by the adsorption area of the zeolite rotating wheel and then is discharged, and high-temperature gas is introduced into the desorption area and cooling gas is introduced into the cooling area;
the VOCs waste gas treatment system also comprises a post-separation device, a heat exchange box and a heat exchange combustion box;
the VOCs waste gas is treated by a zeolite concentration device and then treated by a separation device to adsorb VOCs components and then discharged;
the heat exchange box is provided with a low-temperature area and a high-temperature area which are mutually and airtightly isolated, the heat exchange combustion box is provided with a combustion chamber and a heat exchange chamber which are mutually and airtightly isolated, air is preheated in the low-temperature area of the heat exchange box and then is led into the heat exchange chamber of the heat exchange combustion chamber for heating, and high-temperature air is formed after heating for desorption treatment in a desorption area;
the first-stage VOCs concentrated gas formed after desorption in the desorption area is introduced into a heat exchange combustion box for combustion, high-temperature clean gas formed after combustion is introduced into a separation device for desorbing VOCs components adsorbed by the separation device to form second-stage VOCs concentrated gas, and the second-stage VOCs concentrated gas is introduced into a high-temperature area in the heat exchange box for heating and preheating air in the low-temperature area;
the pre-processing box is also provided with a secondary lead-in opening, and the secondary lead-in opening is arranged between the dust filter and the activated carbon filter;
and the secondary VOCs concentrated gas is guided to the zeolite rotating wheel after being guided out from the high-temperature zone of the heat exchange box and is used for cooling the cooling zone, is guided into the pre-treatment box through the secondary introducing port after passing through the cooling zone, and is mixed with VOCs waste gas filtered by the dust filter in the pre-treatment box.
2. A VOCs exhaust treatment system in accordance with claim 1,
the catalytic material is copper cerium oxide particles;
the zeolite used in the zeolite rotating wheel adopts zeolite with LTA structure.
3. A VOCs exhaust treatment system in accordance with claim 2,
the zeolite used in the zeolite runner is itq-26 zeolite and/or itq-29 zeolite and/or itq-33 zeolite.
4. A VOCs exhaust treatment system in accordance with claim 1,
the separation device includes:
the device comprises a shell, a driving motor and a rotating body;
the shell is provided with a cylindrical inner cavity and an upper part and a lower part, a first air inlet and a first air outlet are arranged at the head end and the tail end of the upper part, and a second air inlet and a second air outlet are arranged at the head end and the tail end of the lower part;
a driving motor is embedded in the side wall of the first air inlet;
the rotating body comprises a rotating shaft and a closed rotating shell which is fixed on the rotating shaft and matched with the cylindrical inner cavity in the shell, the head end and the tail end of the closed rotating shell are plate-shaped or net-shaped supporting structures which can be used for ventilation, and filtering materials are filled in the closed rotating shell.
5. A VOCs exhaust treatment system in accordance with claim 4,
the filter material is itq-26 zeolite and/or itq-29 zeolite and/or itq-33 zeolite.
6. A VOCs exhaust treatment system in accordance with claim 4,
a plurality of supporting ribs are uniformly arranged in the closed type rotating shell around the circumferential direction of the rotating shaft;
support the rib and connect pivot and closed rotatory shells inner wall, separate closed rotatory shells inner wall for a plurality of mutual airtight separation's cavity, all be equipped with the spout on every supports the rib, the embedded slider that is equipped with of spout and slider and chute wall carry out elastic connection through the elastic component, be equipped with airtight elastic diaphragm between two sliders in same cavity, airtight elastic diaphragm separates each cavity of closed rotatory shells, forms the filling area in one side towards the pivot, and filtering material fills in the filling area.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013026255A1 (en) * | 2011-08-25 | 2013-02-28 | Ma Jun | Vapor compression type air conditioner of refrigeration combined with desiccant wheel dehumidification |
| CN105749695A (en) * | 2016-04-22 | 2016-07-13 | 南京大学环境规划设计研究院有限公司 | Low concentration, large wind volume and high odor waste gas concentration energization equipment and technology thereof |
| CN113368654A (en) * | 2021-06-29 | 2021-09-10 | 南方环境有限公司 | Zeolite rotating wheel adsorption, concentration and desorption CO catalytic oxidation system and process thereof |
| CN113877363A (en) * | 2021-09-14 | 2022-01-04 | 徐州徐工施维英机械有限公司 | Low-concentration VOCs waste gas energy-saving treatment method and device |
| CN114225640A (en) * | 2021-11-18 | 2022-03-25 | 浙江菲达环保科技股份有限公司 | Two-stage cooling zeolite rotating wheel catalytic oxidation VOCs treatment system and method |
-
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- 2022-07-27 CN CN202210891371.8A patent/CN115155308B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013026255A1 (en) * | 2011-08-25 | 2013-02-28 | Ma Jun | Vapor compression type air conditioner of refrigeration combined with desiccant wheel dehumidification |
| CN105749695A (en) * | 2016-04-22 | 2016-07-13 | 南京大学环境规划设计研究院有限公司 | Low concentration, large wind volume and high odor waste gas concentration energization equipment and technology thereof |
| CN113368654A (en) * | 2021-06-29 | 2021-09-10 | 南方环境有限公司 | Zeolite rotating wheel adsorption, concentration and desorption CO catalytic oxidation system and process thereof |
| CN113877363A (en) * | 2021-09-14 | 2022-01-04 | 徐州徐工施维英机械有限公司 | Low-concentration VOCs waste gas energy-saving treatment method and device |
| CN114225640A (en) * | 2021-11-18 | 2022-03-25 | 浙江菲达环保科技股份有限公司 | Two-stage cooling zeolite rotating wheel catalytic oxidation VOCs treatment system and method |
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