CN114345061A - Method and system for treating oil fume with volatile organic compounds - Google Patents

Method and system for treating oil fume with volatile organic compounds Download PDF

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Publication number
CN114345061A
CN114345061A CN202210097988.2A CN202210097988A CN114345061A CN 114345061 A CN114345061 A CN 114345061A CN 202210097988 A CN202210097988 A CN 202210097988A CN 114345061 A CN114345061 A CN 114345061A
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China
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adsorption
oil
gas
organic compounds
volatile organic
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Chinese (zh)
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骆坚平
郭行
潘涛
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Beijing Longtao Environment Technology Co ltd
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Beijing Longtao Environment Technology Co ltd
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Priority to CN201710048104.3A priority Critical patent/CN106731415A/en
Priority to CN202210097988.2A priority patent/CN114345061A/en
Publication of CN114345061A publication Critical patent/CN114345061A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/20Combinations of devices covered by groups B01D45/00 and B01D46/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023Pockets filters, i.e. multiple bag filters mounted on a common frame
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/02Separation 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
    • B01D53/06Separation 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2253/00Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10Inorganic adsorbents
    • B01D2253/106Silica or silicates
    • B01D2253/108Zeolites
    • B01D2253/1085Zeolites characterized by a silicon-aluminium ratio
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/70Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708Volatile organic compounds V.O.C.'s
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/40Further details for adsorption processes and devices
    • B01D2259/40083Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B01D2259/4009Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention relates to the technical field of oil fume treatment, in particular to a treatment method and a treatment system of oil fume with volatile organic compounds, wherein the method comprises the following steps: the centrifugal oil removal device (11) centrifugally processes oil smoke to separate oil drops and impurities from the oil smoke, the processed oil smoke is filtered by the dry type filtering device (6) to remove solid and liquid tiny particles to leave oil smoke gas with volatile organic compounds, the adsorption device (9) rotates between the adsorption area (1) and the desorption area (10), and the oil smoke gas passes through a molecular sieve in the adsorption area (1) to adsorb the volatile organic compounds; after the molecular sieve rotates to the desorption area (10), the mixed gas flows through the molecular sieve adsorbing the volatile organic compounds to be desorbed at high temperature, the desorbed volatile organic compounds are discharged, combusted and removed, the molecular sieve regenerated by desorption circularly enters the adsorption area (1) to be cooled, then adsorption is carried out, and adsorption-desorption continuous operation is carried out circularly.

Description

Method and system for treating oil fume with volatile organic compounds
The application is a divisional application with application date of 2017, 20.01 and application number of 201710048104.3 and the name of 'a method and a system for treating oily fume with volatile organic compounds'.
Technical Field
The invention relates to the technical field of oil fume treatment, in particular to a treatment method and a treatment system for oil fume with volatile organic compounds.
Background
With the increase of production activities of human beings, a large amount of various waste gases and dust which cannot be effectively treated are generated, such as industrial production waste gases, automobile exhaust gases, coal-fired waste gases, cooking oil fumes, straw-fired waste gases and the like. Cooking fume is the product of high temperature cracking of edible oil and food in frying, cooking, frying and other high temperature processes, and has suspended particle matter, Volatile Organic Compound (VOC) in gas state, unsaturated hydrocarbon, saturated hydrocarbon, benzene series, polycyclic aromatic hydrocarbon, heterocyclic compound, alcohol, aldehyde and other main components, and gas, liquid and solid pollutants formed by pollution of fuel in operation room. Cooking fume contains various toxic and harmful chemical components, different foods can generate different volatile substances at high temperature, and the volatile substances contain a plurality of mutagenic and carcinogenic substances and also have certain contribution to PM2.5 pollution in the air. According to the international energy agency data 2014, the total global carbon emission reaches 323 hundred million tons! The large amount of exhaust gas is discharged to form haze which is terrible weather and seriously threatens human health. The existing treatment technologies mainly comprise a dilution diffusion method, a water absorption method, a catalyst reduction method, a low-temperature plasma removal method and the like. These methods are costly in equipment, costly to operate, inefficient in removal, and do not cover a large number of low end users. The oil fume purification technology in catering industry mainly comprises a mechanical separation method, a filtration method, an electrostatic deposition method, a liquid washing method, a catalytic combustion method and the like, but each technology is difficult to simultaneously treat oil fume waste gas with complex components and three states of gas, liquid and solid. Therefore, the combination of different purification technologies is a fundamental method for thoroughly treating the catering oil fume.
Patent document CN205435476U discloses an industrial waste gas, food and beverage oil flue gas integrated processing device includes gas collecting channel, blast pipe and air discharge fan, and wherein the gas collecting channel is the frustum shape, and its top is connected on the blast pipe, and it still includes UV photodissociation air purifier, and this UV photodissociation air purifier includes casing and core, and casing one side is equipped with the air intake, and the opposite side is equipped with the air outlet, and air intake connection blast pipe, the core includes frame and block terminal, and the frame outside is equipped with the photocatalyst filter screen, and the frame center is equipped with the UV fluorescent tube, photocatalyst filter screen and UV fluorescent tube setting are between air intake and air outlet, and 185nm is less than or equal to the light wave that above-mentioned UV fluorescent tube sent and is less than or equal to 254nm, the air discharge fan sets up on gas collecting channel top or UV photodissociation air purifier's air intake or air outlet or other positions of blast pipe. The patent can treat the waste gas, but the treatment effect of the patent needs to be improved, and particularly the treatment on oil drops, volatile organic compounds and the like needs to be enhanced.
The patent document CN2451237Y discloses a high-voltage electrostatic dust-collecting range hood, which comprises a frame, a smoke dust air inlet pipe section, a filter, a high-voltage electrostatic box, and a purified air outlet pipe section, wherein a transformer is arranged on the high-voltage electrostatic box, and a circuit is connected with an electrode plate and an electrode wire of the high-voltage electrostatic generator in the high-voltage electrostatic box and an electric control panel beside the frame; the high-voltage electrostatic generator arranged in the high-voltage electrostatic box is an electrode polar plate and an electrode polar wire which are densely distributed and arranged in parallel to the airflow direction, the electrode polar plate is a conductive material thin plate with smooth and round corners at the edge, two ends of the electrode polar plate are fixed by a discharge insulating sleeve, the adjacent electrode polar plates are charged with different charges with high voltage or sub-high voltage, positive electricity or negative electricity, and the upper ends of the electrode polar plates are connected with a transformer circuit; the electrode filament is a conductive filament stretched up and down by a spring and arranged at the smoke air inlet, and the upper end of the electrode filament is connected with a transformer circuit and is charged with high voltage electricity. This patent utilizes high voltage static to produce electrostatic field, thoroughly separates oil smoke granule and air, but this patent needs high voltage power supply, and the range of application is restricted, and is especially not very suitable to the family kitchen, and in addition, this patent is ageing easily in the oil smoke environment, breaks down not durable.
Patent document CN105202605A discloses a commercial kitchen oil smoke of portable food and beverage decomposes clarification plant and including the box, the box in including flue gas recovery room, alkaline differentiation room, flue gas filter chamber, charcoal clean room, electrodeless disinfection room, flue gas recovery room upper end be equipped with the suction fan, flue gas recovery room lower extreme intercommunication be equipped with alkaline differentiation room, alkaline differentiation indoor flue gas drainage releaser that is equipped with, flue gas drainage releaser be the L type, alkaline differentiation room and flue gas filter chamber bottom communicate each other, flue gas drainage releaser extend to in the flue gas filter chamber, flue gas drainage releaser upper end be equipped with the splashproof and separate empty grid against the current, the splashproof separate empty grid against the current cross the upper end and be equipped with oil absorption filter against the current, flue gas filter chamber right-hand member be connected with the charcoal clean room, the charcoal clean room in be equipped with charcoal type absorption clarifier, the charcoal purifying device is characterized in that an alkaline differentiation liquid storage box is arranged at the lower end of the charcoal purifying chamber, one side of the storage and recovery box is connected with the electrodeless disinfecting chamber, a disinfecting device frame is arranged in the electrodeless disinfecting chamber, a negative pressure outer exhaust fan is arranged on the right side of the electrodeless disinfecting chamber, and an air distribution grid is arranged at the position of the negative pressure outer exhaust fan. This patent utilizes alkaline liquid differentiation microparticle, and exhaust gas is handled to adverse current grid and polytype filter, but this patent is with high costs, and the structure is complicated, because pile up the greasy dirt easily in the grid, is unsuitable for long-term being suitable for, and to treating oil droplet, volatile organic compounds etc. to be waited to strengthen.
Disclosure of Invention
In view of the above problems, the present invention provides a method and a system for treating oil fume with volatile organic compounds, which thoroughly treat oil mist, VOC and other pollutants in the oil fume through the steps of separation, filtration, adsorption and desorption, and the like, and can be applied for a long time due to the cyclic desorption treatment, and the method and the system are suitable for various environments, and have low cost and good purification effect.
The purpose of the invention is realized by the following technical scheme.
The invention provides a method for treating oil fume with volatile organic compounds, which comprises the following steps:
the first step is as follows: collecting oil fume with volatile organic compounds by an oil fume collecting device (12), inputting the oil fume into a centrifugal oil removing device (11), centrifugally treating the oil fume by the centrifugal oil removing device (11) to separate oil drops and impurities in the oil fume, and enabling the oil drops and the impurities to flow into a waste oil collecting container through an oil guide groove;
the second step is as follows: filtering the oil fume gas treated in the first step by a dry filtering device (6) to remove solid and liquid micro particles so as to leave oil fume gas with volatile organic compounds, wherein the oil fume gas with the volatile organic compounds flows into an adsorption device under the driving of a fan (8);
the third step: the adsorption device (9) with the molecular sieve rotates between the adsorption area (1) and the desorption area (10), and the oil smoke gas with the volatile organic compounds adsorbs the volatile organic compounds in the adsorption area (1) through the molecular sieve;
the fourth step: high-temperature gas generated by the combustor (2) is input into the mixer (3) and mixed with air to form mixed gas with the temperature of 190-210 ℃, when the molecular sieve rotates to the desorption area (10), the mixed gas flows through the molecular sieve adsorbing the volatile organic compounds to be desorbed at high temperature, and the desorbed volatile organic compounds are discharged to be combusted and removed;
the fifth step: the molecular sieve regenerated by desorption circularly enters an adsorption area (1) for cooling, and then is adsorbed, so that continuous adsorption-desorption operation is circularly carried out;
in the third step, the rotating speed of an adsorption rotating wheel of the adsorption device is 3-8 r/h, and the wind speed of the oil smoke gas passing through the adsorption area (1) is 1-4 m/s; the adsorption device (9) is an adsorption rotating wheel, and a hydrophobic Y-type molecular sieve or a ZSM-type molecular sieve and a combination thereof are filled in the adsorption rotating wheel;
in the fourth step, the wind speed of the mixed gas passing through the desorption area (10) is 1-4 m/s, and the desorption temperature is 180-220 ℃;
in the third step, the adsorption device (9) is an adsorption rotating wheel, and a hydrophobic Y-type molecular sieve or a ZSM-type molecular sieve and a combination thereof are arranged in the adsorption rotating wheel.
Preferably, in the first step, the centrifugal oil removal device (11) is of a pipeline type, a plurality of groups of metal wire mesh discs capable of rotating at a high speed are arranged in the centrifugal oil removal device, and the rotating direction of the metal wire mesh discs is perpendicular to the direction of the oil fume.
Preferably, in the second step, the dry filter device (6) comprises a modularized filter bag, the filter bag is made of non-woven fabrics or filter cotton, the average effective pore size of the filter bag is less than 0.5 μm, and the counting efficiency of particles with the particle size of more than or equal to 0.5 μm is not lower than 50%.
The invention also provides a processing system for implementing the processing method of the oil fume with the volatile organic compounds, which comprises an oil fume collecting device (12) for collecting the oil fume with the volatile organic compounds, a centrifugal oil removal device (11) connected with the oil fume collecting device (12) and used for separating oil drops and impurities, a dry type filtering device (6) connected with the centrifugal oil removal device (11) and used for filtering solid and liquid tiny particles, an adsorption device (9) connected with the dry type filtering device (6) and used for adsorbing the volatile organic compounds, and a mixed gas generating device (4) connected with the adsorption device (9) and used for desorption, the adsorption device (9) comprises a molecular sieve, and the mixed gas generating device (4) comprises a burner (2) for heating to generate high-temperature gas and a mixer (3) for mixing the high-temperature gas and air;
the combustor (2) is a gas combustor with a gas electric regulating valve, and one inlet of the mixer (3) is connected with the outlet of the gas combustor and the other inlet is communicated with air;
the dry filtering device (6) is a dry filter with a modularized filter bag; the dry filter is connected with a smoke exhaust fan (8) through a regulating valve (7), the smoke exhaust fan (8) inputs the oil smoke gas into the adsorption device (9), the adsorption device (9) is an adsorption rotating wheel internally provided with a molecular sieve, and the adsorption rotating wheel is divided into an adsorption area (1) and a desorption area (10);
the mixer (3) is provided with a temperature sensor (5).
Preferably, the oil fume collection device (12) is provided with an exhaust fan and a gas collection cover;
the centrifugal oil removal device (11) comprises a pipeline type centrifuge, an oil guide groove and a waste oil collecting container, wherein a plurality of groups of metal wire mesh discs rotating at high speed are arranged in the pipeline type centrifuge;
the volume ratio of the adsorption area (1) to the desorption area (10) is 11:1, and the adsorption rotating wheel rotates to enable the molecular sieve to pass through the adsorption area (1) and the desorption area (10) in sequence so as to continuously run.
Preferably, the oil fume collection device (12) is provided with a wind speed sensor for measuring wind speed, and the centrifugal oil removal device (11) is provided with a rotating speed sensor for measuring centrifugal rotating speed;
the wind speed sensor, the rotating speed sensor and the temperature sensor are connected by the processor; the processor is a general processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), an analog circuit or a digital circuit;
the processor is provided with a memory comprising one or more of a read only memory ROM, a random access memory RAM, a flash memory or an electrically erasable programmable read only memory EEPROM.
The invention also provides a treatment system for treating the oil fume generated in the cooking process, which comprises a gas collection-purification section and a desorption-combustion section; the gas collection-purification section comprises a lampblack collection device (12), a centrifugal oil removal device (11), a dry type filtering device (6), a smoke exhaust fan (8) and an adsorption device (9) which are connected in sequence;
the dry filtering device (6) is a dry filter with a modularized filter bag; the dry filter is connected with a smoke exhaust fan (8) through a regulating valve (7); the smoke exhaust fan (8) inputs the oil smoke gas into the adsorption device (9);
the adsorption device (9) is an adsorption rotating wheel internally provided with a molecular sieve, and the adsorption rotating wheel is divided into an adsorption area (1) and a desorption area (10);
the desorption-combustion section comprises a mixed gas generation device (4) connected with an adsorption device (9), a desorption area (10) in the adsorption rotating wheel (9), a gas stove (13), a flame arrester (14), a blast fan (15) and an electric air regulating valve (16);
the mixed gas generating device (4) comprises a burner (2) for heating and generating high-temperature gas and a mixer (3) for mixing the high-temperature gas and air; the mixer (3) is provided with a temperature sensor (5);
the oil fume collection device (12), the centrifugal oil removal device (11) and the dry type filtering device (6) are sequentially arranged right above the gas stove (13);
the flame arrester (14) is arranged between the gas stove (13) and the blast fan (15); the air blower (15) is connected with the gas stove (13) through a flame arrester (14);
the air blower (15) is connected with an outlet of the desorption area through one end of a three-way pipeline, and the other end of the three-way pipeline is connected with an air electric regulating valve (16) for regulating air.
Drawings
Various other advantages and benefits of the present invention will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. Also, like parts are designated by like reference numerals throughout the drawings.
FIG. 1 is a schematic illustration of the steps of a method for treating fume with volatile organic compounds according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a processing system for implementing a method for processing fume with volatile organic compounds according to an embodiment of the present invention;
fig. 3 is a schematic connection diagram of a processing system for implementing a method for processing oil fume with volatile organic compounds according to an embodiment of the present invention.
The invention is further explained below with reference to the figures and examples.
Detailed Description
Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art, and it is intended that certain terms are used throughout the specification and claims to refer to particular components. As one skilled in the art will appreciate, various names may be used to refer to a component. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description which follows is a preferred embodiment of the invention, but is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the present invention is defined by the appended claims.
For the purpose of facilitating understanding of the embodiments of the present invention, the following description will be made by taking specific embodiments as examples with reference to the accompanying drawings, and the drawings are not to be construed as limiting the embodiments of the present invention.
For better understanding, fig. 1 is a schematic diagram of the steps of a method for treating fume with volatile organic compounds, and as shown in fig. 1, the steps of a method for treating fume with volatile organic compounds include:
in first step S1, collect the fume through fume collection device 12 and have volatile organic compounds, and input into centrifugal deoiling device 11, centrifugal deoiling device 11 will fume centrifugal treatment is with separating out oil droplet and impurity in the fume, oil droplet and impurity flow into waste oil collecting container via leading the oil groove.
In the second step S2, the fume gas treated in the first step S1 is filtered by the dry filter 6 to remove solid and liquid fine particles to leave the volatile organic compounds-carrying fume gas, which flows into the adsorption device under the driving of the fan 7.
In a third step S3, the adsorption device 9 with molecular sieve is rotated between the adsorption zone 1 and the desorption zone 10, and the soot gas passes through the molecular sieve in the adsorption zone 1 to adsorb volatile organic compounds.
In the fourth step S4, the high temperature gas generated by the burner 2 is input into the mixer 3 and mixed with air to form a mixed gas with a temperature in the range of 190-210 ℃, and after the molecular sieve rotates to the desorption region 10, the mixed gas flows through the molecular sieve adsorbing the volatile organic compounds to desorb at a high temperature, and the desorbed volatile organic compounds are discharged for combustion and removal.
In the fifth step S5, the molecular sieve regenerated by desorption is circulated into the adsorption zone 1 to be cooled and then is adsorbed again, and thus the continuous operation of adsorption-desorption is performed.
In one embodiment, in the first step S1, the centrifugal oil removing device 11 is a pipe type, and a plurality of sets of wire mesh discs capable of rotating at high speed are arranged inside the pipe type, and the rotating direction of the wire mesh discs is perpendicular to the oil fume direction.
In one embodiment, in the second step S2, the dry filter device 6 includes a modular filter bag made of non-woven fabric or filter cotton, the average effective pore size of the filter bag is smaller than 0.5 μm, the counting efficiency of the particles with the particle size of 0.5 μm or more is not less than 50%, and the fume is filtered by the filter bag to remove solid and liquid micro particles to leave the volatile organic matter-containing fume.
In one embodiment, in the third step S3, the adsorption device 9 is an adsorption rotating wheel filled with hydrophobic Y-type molecular sieve or ZSM-type molecular sieve and combinations thereof.
In one embodiment, in the third step S3, the rotation speed of the adsorption rotating wheel is 3-8 r/h, the wind speed of the oil smoke gas passing through the adsorption area 1 is 1-4 m/S, in the fourth step S4, the wind speed of the mixed gas passing through the desorption area 10 is 1-4 m/S, and the desorption temperature is 180-220 ℃.
Fig. 2 is a schematic structural diagram of a processing system for implementing a method for processing oil fume with volatile organic compounds according to an embodiment of the present invention, which will be described in detail with reference to fig. 2.
As shown in fig. 2, a processing system for implementing the processing method of oil fume with volatile organic compounds includes an oil fume collecting device 12 for collecting oil fume with volatile organic compounds, a centrifugal oil removing device 11 connected to the oil fume collecting device 12 for separating oil drops and impurities, a dry filtering device 6 connected to the centrifugal oil removing device 11 for filtering solid and liquid fine particles, an adsorbing device 9 connected to the dry filtering device 6 for adsorbing volatile organic compounds, and a mixed gas generating device 4 connected to the adsorbing device 9 for desorption, wherein the adsorbing device 9 includes a molecular sieve, and the mixed gas generating device 4 includes a burner 2 for heating and generating high-temperature gas and a mixer 3 for mixing the high-temperature gas and air.
In one embodiment, the oil fume collecting device 12 is provided with an exhaust fan and a gas collecting hood, the centrifugal oil removing device 11 comprises a pipeline type centrifuge, an oil guide groove and a waste oil collecting container, the pipeline type centrifuge is internally provided with a plurality of groups of metal wire mesh discs rotating at a high speed, the waste oil collecting container is used for collecting separated oil drops and impurities, the dry type filtering device 6 is a dry type filter with a modularized filter bag, the dry type filter is connected with a smoke exhaust fan 8 through a regulating valve 7, the smoke exhaust fan 8 inputs the oil fume gas into the adsorption device 9, the adsorption device 9 is an adsorption rotating wheel internally provided with a molecular sieve, the adsorption rotating wheel is divided into an adsorption area 1 and a desorption area 10, the volume ratio of the adsorption area 1 to the desorption area 10 is 11:1, the adsorption rotating wheel rotates to enable the molecular sieve to sequentially pass through the adsorption area 1 and the desorption area 10 so as to continuously operate, and the combustor 2 is a gas combustor with a gas electric regulating valve, an inlet of the mixer 3 is connected with an outlet of the gas burner and the other inlet of the mixer is communicated with air.
In one embodiment, the fume gas collecting device 12 is provided with a wind speed sensor for measuring wind speed, the centrifugal oil removing device 11 is provided with a rotational speed sensor for measuring centrifugal rotational speed, the mixer 3 is provided with a temperature sensor 5, the processing system comprises a processor connected with the wind speed sensor, the rotational speed sensor and the temperature sensor, the processor is a general processor, a digital signal processor, an application specific integrated circuit ASIC, a field programmable gate array FPGA, an analog circuit or a digital circuit, the processor is provided with a memory, and the memory comprises one or more of a read only memory ROM, a random access memory RAM, a flash memory or an electrically erasable programmable read only memory EEPROM. The processor can preset a plurality of modes such as an energy-saving mode, an efficacy mode and the like in the memory, and the processor can obtain the expected treatment effect by adjusting the collecting speed of the oil fume collecting device 12, the centrifugal speed of the centrifugal oil removing device and the temperature of the mixed gas.
In one embodiment, the memory is volatile memory or non-volatile memory.
The invention can be applied to the treatment of various oil fumes, wherein the catering oil fume waste gas and the oil fume waste gas generated in the cooking process of frying, stir-frying, cooking and frying mainly contain liquid oil drops, suspended particulate matters, VOC and other pollutants. In particular to a treatment method for treating fume generated in a cooking process, which is implemented by the treatment system.
For further understanding of the present invention, the restaurant waste gas is taken as an example below. Fig. 3 is a schematic connection diagram of a system for processing fume with volatile organic compounds according to an embodiment of the present invention, as shown in fig. 3, a gas range 13 includes two burners for cooking Chinese dishes, generating fume exhaust containing pollutants such as liquid oil droplets, suspended particulate matter, and VOCs,
the oil fume and waste gas are treated thoroughly through the gas collecting-purifying section and the desorption-burning section. The gas collection-purification section comprises a fume gas collection device 12 such as a gas collection hood, a centrifugal oil removal device 11, a dry filter device 6 such as a dry filter, a smoke exhaust fan 8 and an adsorption device 9 such as an adsorption rotating wheel which are connected in sequence.
Oil smoke waste gas is at first collected by gas collecting channel 12, gets into centrifugal deoiling device 11 and carries out the preliminary treatment, and large granule oil drips and impurity are effectively intercepted because of inertial action and the rotatory metal mesh dish bumps, is got rid of the oil groove of leading with large granule oil drips and impurity by metal mesh dish centrifugal action again, flows into waste oil collecting container.
The pretreated oil smoke waste gas enters a dry filter 6, and solid or liquid tiny particles and the like are effectively filtered by a filter bag; the residual oil smoke waste gas containing VOC flows through the adsorption area 1 of the adsorption rotating wheel 9 at the wind speed of 2m/s under the drive of the smoke exhaust fan 8, the Y-type molecular sieve and the ZSM-type molecular sieve in the adsorption area 1 adsorb and remove the VOC in the waste gas by using a unique microporous structure, the clean gas can be directly discharged into the atmosphere, the molecular sieve adsorbing the VOC enters the desorption area 10 to be subjected to high-temperature desorption under the rotation of the adsorption rotating wheel 9 at the rotating speed of 4r/h, and the molecular sieve regenerated by desorption circularly enters the transition area of the adsorption area 1 to be cooled, and then the adsorption work is carried out, so that the continuous adsorption-desorption work is carried out in the circulation.
The desorption-combustion section comprises a gas electric regulating valve, a gas burner 2, a mixer 3, a temperature sensor 5, a desorption area 10 in an adsorption rotating wheel 9, a gas stove 13, a flame arrester 14, a blast fan 15 and an air electric regulating valve 16.
The gas burner 2 adopts the existing natural gas of a restaurant to generate high-temperature gas, and then the high-temperature gas is mixed with external air in the mixer 3 to form mixed gas with the temperature within the range of 200 +/-10 ℃; the temperature control is to detect the temperature of the mixed gas through the temperature sensor 5, control the opening state of the gas electric regulating valve according to the change of the temperature, regulate the gas quantity in real time and control the temperature of the mixed gas.
Introducing the mixed gas into a desorption area 10 in an adsorption rotating wheel 9 at the wind speed of 2m/s, heating the molecular sieve to desorb the adsorbed VOC, mixing the adsorbed VOC with air, preheating the adsorbed VOC, and bringing the adsorbed VOC into a gas stove 13 by a blast fan 15; VOC is thoroughly eliminated in the gas stove 13 through a combustion method, and a flame arrester 14 is arranged between the gas stove 13 and the blast fan 15, so that flame spread is effectively prevented, and the use safety of the system is ensured.
In one embodiment, the desorption area outlet is connected with a blast fan 15 through a three-way pipeline, the other end of the three-way pipeline is connected with an air electric regulating valve 16 for regulating air, and the blast fan 15 is connected with the gas stove 13 through a flame arrester 14.
In one embodiment, the gas burner 2 may use natural gas, liquefied petroleum gas, coal gas, or biogas as fuel.
Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments and application fields, and the above-described embodiments are illustrative, instructive, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto without departing from the scope of the invention as defined by the appended claims.

Claims (7)

1. The method for treating the oil fume with the volatile organic compounds is characterized by comprising the following steps of:
the first step is as follows: collecting oil fume with volatile organic compounds by an oil fume collecting device (12), inputting the oil fume into a centrifugal oil removing device (11), centrifugally treating the oil fume by the centrifugal oil removing device (11) to separate oil drops and impurities in the oil fume, and enabling the oil drops and the impurities to flow into a waste oil collecting container through an oil guide groove;
the second step is as follows: filtering the oil fume gas treated in the first step by a dry filtering device (6) to remove solid and liquid micro particles so as to leave oil fume gas with volatile organic compounds, wherein the oil fume gas with the volatile organic compounds flows into an adsorption device under the driving of a fan (8);
the third step: the adsorption device (9) with the molecular sieve rotates between the adsorption area (1) and the desorption area (10), and the oil smoke gas with the volatile organic compounds adsorbs the volatile organic compounds in the adsorption area (1) through the molecular sieve;
the fourth step: high-temperature gas generated by the combustor (2) is input into the mixer (3) and mixed with air to form mixed gas with the temperature of 190-210 ℃, when the molecular sieve rotates to the desorption area (10), the mixed gas flows through the molecular sieve adsorbing the volatile organic compounds to be desorbed at high temperature, and the desorbed volatile organic compounds are discharged to be combusted and removed;
the fifth step: the molecular sieve regenerated by desorption circularly enters an adsorption area (1) for cooling, and then is adsorbed, so that continuous adsorption-desorption operation is circularly carried out;
in the third step, the rotating speed of an adsorption rotating wheel of the adsorption device is 3-8 r/h, and the wind speed of the oil smoke gas passing through the adsorption area (1) is 1-4 m/s; the adsorption device (9) is an adsorption rotating wheel, and a hydrophobic Y-type molecular sieve or a ZSM-type molecular sieve and a combination thereof are filled in the adsorption rotating wheel;
in the fourth step, the wind speed of the mixed gas passing through the desorption area (10) is 1-4 m/s, and the desorption temperature is 180-220 ℃;
in the third step, the adsorption device (9) is an adsorption rotating wheel, and a hydrophobic Y-type molecular sieve or a ZSM-type molecular sieve and a combination thereof are arranged in the adsorption rotating wheel.
2. The method for treating fume with volatile organic compounds according to claim 1, wherein in the first step, the centrifugal oil removing device (11) is of a pipe type, and a plurality of groups of wire mesh discs capable of rotating at high speed are arranged in the centrifugal oil removing device, and the rotating direction of the wire mesh discs is perpendicular to the fume direction.
3. The method for treating fume with volatile organic compounds according to claim 1, wherein: in the second step, the dry type filtering device (6) comprises a modularized filtering bag, the filtering bag is made of non-woven fabrics or filter cotton, the average effective pore size of the filtering bag is smaller than 0.5 mu m, and the counting efficiency of particles with the particle size larger than or equal to 0.5 mu m is not lower than 50%.
4. A treatment system for implementing the method for treating fume with volatile organic compounds according to any one of claims 1 to 5, characterized in that: the device comprises an oil fume collecting device (12) for collecting oil fume gas with volatile organic compounds, a centrifugal oil removal device (11) connected with the oil fume collecting device (12) and used for separating oil drops and impurities, a dry filtering device (6) connected with the centrifugal oil removal device (11) and used for filtering solid and liquid micro particles, an adsorption device (9) connected with the dry filtering device (6) and used for adsorbing the volatile organic compounds, and a mixed gas generating device (4) connected with the adsorption device (9) and used for desorption, wherein the adsorption device (9) comprises a molecular sieve, and the mixed gas generating device (4) comprises a combustor (2) used for heating and generating high-temperature gas and a mixer (3) used for mixing the high-temperature gas and air;
the combustor (2) is a gas combustor with a gas electric regulating valve, and one inlet of the mixer (3) is connected with the outlet of the gas combustor and the other inlet is communicated with air;
the dry filtering device (6) is a dry filter with a modularized filter bag; the dry filter is connected with a smoke exhaust fan (8) through a regulating valve (7), the smoke exhaust fan (8) inputs the oil smoke gas into the adsorption device (9), the adsorption device (9) is an adsorption rotating wheel internally provided with a molecular sieve, and the adsorption rotating wheel is divided into an adsorption area (1) and a desorption area (10);
the mixer (3) is provided with a temperature sensor (5).
5. The processing system of claim 4, wherein: the oil fume collection device (12) is provided with an exhaust fan and a gas collection cover;
the centrifugal oil removal device (11) comprises a pipeline type centrifuge, an oil guide groove and a waste oil collecting container, wherein a plurality of groups of metal wire mesh discs rotating at high speed are arranged in the pipeline type centrifuge;
the volume ratio of the adsorption area (1) to the desorption area (10) is 11:1, and the adsorption rotating wheel rotates to enable the molecular sieve to pass through the adsorption area (1) and the desorption area (10) in sequence so as to continuously run.
6. The processing system of claim 4, wherein: the oil fume collection device (12) is provided with a wind speed sensor for measuring wind speed, and the centrifugal oil removal device (11) is provided with a rotating speed sensor for measuring centrifugal rotating speed;
the wind speed sensor, the rotating speed sensor and the temperature sensor are connected by the processor; the processor is a general processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), an analog circuit or a digital circuit;
the processor is provided with a memory comprising one or more of a read only memory ROM, a random access memory RAM, a flash memory or an electrically erasable programmable read only memory EEPROM.
7. A treatment system for treating fume gas generated in a cooking process, the system comprising a gas collection-purification section and a desorption-combustion section; the gas collection-purification section comprises a lampblack collection device (12), a centrifugal oil removal device (11), a dry type filtering device (6), a smoke exhaust fan (8) and an adsorption device (9) which are connected in sequence;
the dry filtering device (6) is a dry filter with a modularized filter bag; the dry filter is connected with a smoke exhaust fan (8) through a regulating valve (7); the smoke exhaust fan (8) inputs the oil smoke gas into the adsorption device (9);
the adsorption device (9) is an adsorption rotating wheel internally provided with a molecular sieve, and the adsorption rotating wheel is divided into an adsorption area (1) and a desorption area (10);
the desorption-combustion section comprises a mixed gas generation device (4) connected with an adsorption device (9), a desorption area (10) in the adsorption rotating wheel (9), a gas stove (13), a flame arrester (14), a blast fan (15) and an electric air regulating valve (16);
the mixed gas generating device (4) comprises a burner (2) for heating and generating high-temperature gas and a mixer (3) for mixing the high-temperature gas and air; the mixer (3) is provided with a temperature sensor (5);
the oil fume collection device (12), the centrifugal oil removal device (11) and the dry type filtering device (6) are sequentially arranged right above the gas stove (13);
the flame arrester (14) is arranged between the gas stove (13) and the blast fan (15); the air blower (15) is connected with the gas stove (13) through a flame arrester (14);
the air blower (15) is connected with an outlet of the desorption area through one end of a three-way pipeline, and the other end of the three-way pipeline is connected with an air electric regulating valve (16) for regulating air.
CN202210097988.2A 2017-01-20 2017-01-20 Method and system for treating oil fume with volatile organic compounds Pending CN114345061A (en)

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