CN111871155A - Metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device - Google Patents
Metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device Download PDFInfo
- Publication number
- CN111871155A CN111871155A CN202010700611.2A CN202010700611A CN111871155A CN 111871155 A CN111871155 A CN 111871155A CN 202010700611 A CN202010700611 A CN 202010700611A CN 111871155 A CN111871155 A CN 111871155A
- Authority
- CN
- China
- Prior art keywords
- gas
- metal
- ionic liquid
- based ionic
- membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- B01D53/007—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 irradiation
-
- 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
- B01D53/14—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 absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- 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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
- B01D53/22—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 diffusion
- B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/30—Ionic liquids and zwitter-ions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
Abstract
The invention provides a metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device, which organically combines a metal-based ionic liquid supported liquid membrane technology and a photocatalytic technology, and overcomes the use bottlenecks of limited metal ion capacity, higher viscosity and high manufacturing cost of the traditional ionic liquid supported liquid membrane; the waste gas purification efficiency is high, no secondary pollution is caused, the continuous operation can be realized, the human health is benefited, the environmental pollution is reduced, and better social benefit and environmental benefit are realized.
Description
Technical Field
The invention relates to the technical field of gas purification, in particular to a metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device.
Background
The petroleum is a mixture of a plurality of liquid hydrocarbons such as alkane, cyclane, aromatic hydrocarbon, olefin and the like, the hydrocarbon formed by combining carbon and hydrogen forms the main component of the petroleum, accounts for about 95 to 99 percent, and is the main body for development and utilization; the oil products have a large amount of high-concentration oil gas waste gas emission in the processes of conveying, processing and storing, so that great economic waste is caused, the environment is seriously polluted, and more seriously, the potential danger of fire and explosion accidents also exists. In addition, the volatilization of oil gas also affects the quality of finished oil, which causes the increase of the initial boiling point of gasoline, the reduction of vapor pressure, the reduction of octane number and the deterioration of antiknock property, and the evaporation loss of oil products is caused by the volatility of oil products and the imperfect mining and smelting process and equipment, which has great harm to the environment and human health, so the oil gas waste gas needs to be recycled, thereby improving the living environment and the living quality of people.
The ionic liquid is a salt which is liquid at room temperature or close to room temperature and completely consists of anions and cations, and is an environment-friendly green solvent. The ionic liquid used in the membrane separation technology has the characteristics of difficult volatilization, good stability and easy dissolution in transition metal salt, so that the ionic liquid and the metal compound are combined, and the selective permeation is realized by utilizing the solubility difference of different components in oil gas waste gas in the membrane material. Meanwhile, the ionic liquid supported liquid membrane has the advantages of high selectivity, high permeability and the like in the absorption and separation aspect of the polluted gas, has the advantages of obvious separation effect, strong durability and the like in the separation aspect of organic matters, and has the advantages of high catalytic efficiency, recycling and the like in the aspect of chemical reaction. The ionic liquid is applied to the supporting liquid film, the characteristics of low volatilization and high viscosity of the ionic liquid are utilized, the volatilization loss of the film liquid and the loss in micropores are effectively reduced, and the stability of an ionic liquid system is obviously improved.
In recent years, various metal ions are utilized to modify ionic liquids, and a series of metal-based ionic liquids with specific functions are designed and synthesized. Compared with common ionic liquid, the metal-based ionic liquid has more outstanding properties such as paramagnetism, Lewis acidity and electrochemistry, and therefore, the ionic liquid is widely applied to the fields of catalysis, electrochemistry, gas separation and the like.
The supported liquid membrane is formed by filling a liquid absorbent containing a promoting carrier into micropores of the microfiltration supported membrane, selectively absorbing at a high pressure side and desorbing and releasing at a low pressure side, so that selective permeation of target gas components is realized. The supported liquid film couples the chemical absorption and analysis processes to one unit operation, so that the preparation is simple and the operation is convenient.
The photocatalysis is used as a waste gas treatment technology with wide development potential, and can decompose organic macromolecules which are difficult to degrade into organic micromolecules or completely mineralize into CO2、H2O and inorganic ions, has the advantages of wide application range, mild reaction conditions, simple process, strong oxidation capacity, no secondary pollution and the like, and products obtained after waste gas treatment can not pollute the environment, so that the method is widely regarded.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the invention provides a metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device, which overcomes the use bottlenecks of limited metal ion capacity, higher viscosity and high manufacturing cost of the traditional ionic liquid supported liquid membrane; the metal-based ionic liquid supported liquid membrane technology and the photocatalysis technology are organically combined, so that the waste gas purification efficiency is high, no secondary pollution is caused, the continuous operation can be realized, the human health is facilitated, the environmental pollution is reduced, and the social benefit and the environmental benefit are better.
The technical scheme adopted by the invention for solving the technical problems is as follows: a metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device comprises a raw material gas tank, a metal-based ionic liquid supported liquid membrane component and a photocatalytic reaction device; the gas outlet of the raw material gas tank is connected with a gas-oil waste gas inlet pipeline; the front end of the metal-based ionic liquid supported liquid membrane component is provided with a waste gas inlet, the rear end of the metal-based ionic liquid supported liquid membrane component is provided with a trapped gas outlet, the top of the metal-based ionic liquid supported liquid membrane component is provided with a permeated gas outlet, the waste gas inlet is communicated with the tail end of an oil gas waste gas inlet pipeline, and the permeated gas outlet is connected with a gas recovery pipeline; the photocatalytic reaction device comprises a photocatalytic reaction tank body, an ultraviolet light lamp tube and a plurality of baffle plates which are arranged at intervals, wherein one end of the photocatalytic reaction tank body is provided with a trapped gas inlet, the other end of the photocatalytic reaction tank body is provided with a purified gas outlet, and a purified gas outlet pipeline is communicated with a purified gas tank.
Furthermore, in order to prolong the service life of the membrane module, the feed gas can be pretreated through an oil gas waste gas inlet pipeline. The oil gas waste gas inlet pipeline comprises an induced draft fan, a dust removal device, a dewatering device, an oil gas separation device, an adsorption device and a filter which are sequentially connected between the gas outlet of the raw material gas tank and the waste gas inlet at the front end of the metal-based ionic liquid supporting liquid membrane assembly through pipelines; the outlet of the filter is connected with the waste gas inlet through a pipeline, and a gas flowmeter and a pressure gauge are further arranged on the pipeline. The draught fan is installed on the air inlet pipe line and used for conveying the oil gas waste gas to be treated to the dust removal device. The dust removal device performs gas-solid separation, and further settles suspended particles in the oil gas waste gas, so that the metal-based ionic liquid supported liquid membrane component achieves the best purification effect. The dewatering device is a high-efficiency water film dewatering device, water molecules in oil gas are removed, and corrosion of equipment is avoided. The oil-gas separation device is used for carrying out oil-gas separation on the feed gas, removing oil and further recycling. The adsorption device pretreats part of impurity gases (such as carbon dioxide) in the oil gas waste gas so as to improve the degradation efficiency of the oil gas in the processes of the metal-based ionic liquid supported liquid membrane component and the photocatalytic reaction. The filter is filter cellucotton or activated carbon cellucotton, and is double-deck filtration, can prevent mineralize mineralization ion, suspended particle from getting into the membrane module, avoids damage and the jam of metal base ionic liquid support liquid membrane subassembly, increase of service life.
Preferably, the metal-based ionic liquid supported membrane module comprises a porous membrane module and an active component filled in the porous membrane module.
Further, the porous membrane module is a hollow fiber type membrane module or a tubular type membrane module; the membrane material of the porous membrane component is a hydrophobic modified inorganic porous membrane or a high polymer microporous membrane; the active component is metal-based ionic liquid, and the metal-based ionic liquid is a compound of ionic liquid and metal chloride. The preparation of the metal-based ionic liquid supported liquid film can adopt a physical impregnation method to prepare the film.
Furthermore, the gas recovery pipeline comprises a vacuum meter, a gas flowmeter, a vacuumizing device and a gas recovery tank which are sequentially connected with the permeating gas outlet.
Preferably, the inner cavity of the tank body of the photocatalytic reaction device is of a cylindrical structure, the ultraviolet light tube penetrates through the axis of the cylindrical structure, and the axis of the ultraviolet light tube and the axis of the cylindrical structure are positioned on the same straight line; a gas distributor is fixed at the end part of the inner cavity corresponding to the trapped gas inlet; the baffle is in a segmental shape, the round surface of the segmental shape is fixedly attached to the inner wall of the tank body, and the willow baffle is provided with a hole for the ultraviolet lamp tube to penetrate through; the opening directions of segmental arch notches of the circular segment shapes of two adjacent baffle plates are different; the inner walls of the upper reaction cavity and the lower reaction cavity of the photocatalytic reaction device and the side wall of the baffle are respectively attached with a photocatalyst film.
Furthermore, the tank body is formed by folding and sealing an upper reaction cavity and a lower reaction cavity, the upper reaction cavity and the lower reaction cavity are provided with flange edges at corresponding folding positions, and a sealing gasket is arranged between the flange edge of the upper reaction cavity and the flange edge of the lower reaction cavity.
Furthermore, the ultraviolet lamp tube is also provided with a quartz glass sleeve, the quartz glass sleeve penetrates through a hole in the baffle plate and is hermetically connected with the two ends of the tank body of the quartz glass sleeve and the photocatalytic reaction device through a sealing ring, and the axis of the quartz glass sleeve coincides with the axis of the cylindrical structure.
Furthermore, the ultraviolet lamp tube circuit is connected with a controller, a ballast and a lead.
Furthermore, the trapped gas inlet of the photocatalytic reaction device is provided with an air inlet sampling port, the purified gas outlet is provided with an air outlet sampling port, and the air inlet sampling port and the air outlet sampling port are respectively communicated with a gas analysis and detection device through air-entraining pipelines.
The invention has the beneficial effects that:
1. the ionic liquid dissolved transition metal salt is used as the absorbent, so that the defects of volatility, poor stability, poor separation performance and the like of the traditional ionic liquid absorbent are overcome, metal ions stably exist in membrane pores of the supporting liquid membrane in a coordination form with the ionic liquid, the influence of mass transfer is reduced, and the dispersion degree of metal is improved. Meanwhile, the ionic liquid is used as a catalyst in the reaction process, has the function of an extracting agent, can realize deep removal of various oil gas components under mild conditions, and expands the application range of the ionic liquid.
2. The metal-based ionic liquid supported liquid membrane component is combined with the photocatalysis technology, so that the problems of low oil-gas degradation efficiency, poor stability and the like in the traditional photocatalysis technology are effectively solved, and the problem that the oil-gas treatment effect is poor only by the photocatalysis technology is avoided, so that the metal-based ionic liquid supported liquid membrane-photocatalysis reaction device is constructed, and the oil-gas degradation efficiency is greatly improved.
3. Compared with methods such as cryogenic separation, chemical absorption, pressure swing adsorption and the like, the method for applying the metal-based ionic liquid supported liquid membrane component to gas separation has the advantages of low energy consumption, high efficiency, simplicity in operation, no chemical change in the separation process, no pollution to products, small occupied area of equipment, simple structure, easiness in maintenance and the like.
4. The invention adopts a physical impregnation method to prepare the membrane, has simple operation and low requirement on equipment, fills the metal-based ionic liquid in the porous inorganic membrane material by the impregnation method to prepare the metal-based ionic liquid supported liquid membrane, can effectively avoid the loss of the ionic liquid when used for separating partial gas in oil gas waste gas due to the characteristics of large viscosity and difficult volatilization of the ionic liquid, ensures that the ionic liquid can be regenerated and the metal-based ionic liquid supported liquid membrane has higher stability, can prolong the service life of the supported liquid membrane, and overcomes the defects of the traditional supported liquid membrane due to the thermal stability and non-volatilization of the membrane liquid of the ionic liquid.
5. Set up the baffling baffle of circle segmental shape in the photocatalytic reaction device, make oil gas waste gas be approximate "S" type flow direction in the reaction chamber, prolonged the dwell time of oil gas at the reaction chamber, make oil gas can fully contact photocatalyst, the reaction is more abundant, and then better improvement photocatalytic reaction rate and purification efficiency, guaranteed purifying effect.
6. The oil gas waste gas is pretreated by the dust removal device, the water removal device, the oil gas separation device, the adsorption device and the filter, so that the contents of mineralized ions, suspended impurities and impurity gases in the raw gas can be reduced, the pipeline is prevented from being blocked, scaled and corroded, the protective film component is not damaged, the service life of the film component is prolonged, and the purification efficiency is improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a schematic view of the structure of a photocatalytic reaction apparatus according to the present invention.
FIG. 3 is a sectional view of the photocatalytic reaction apparatus according to the present invention.
FIG. 4 is a schematic view of the baffle structure of the photocatalytic reactor of the present invention.
FIG. 5 is a schematic view of the structure of a gas distributor of the photocatalytic reaction device according to the present invention.
FIG. 6 is a schematic structural view of a quartz glass sleeve according to the present invention.
In the figure, 1-1, 1-2 parts of a metal-based ionic liquid supported liquid membrane component, 1-3 parts of a waste gas inlet, 1-4 parts of a permeated gas outlet, 1-5 parts of an intercepted gas outlet, 2-1 parts of a metal-based ionic liquid supported liquid membrane, 2-2 parts of a photocatalytic reaction device, 2-3 parts of an upper reaction cavity, 2-4 parts of a lower reaction cavity, 2-5 parts of a photocatalyst film, 2-6 parts of a segmental baffle, 2-7 parts of a gas distributor, 2-8 parts of an intercepted gas inlet, 2-9 parts of a purified gas outlet, 2-10 parts of a gas inlet sampling port, 2-11 parts of an exhaust sampling port, 2-12 parts of a flange edge, a sealing gasket 3, a raw material gas tank 4, a valve 5, a draught fan 6, a dust removal device 7, The device comprises an adsorption device 10, a filter 11, a gas flowmeter 12, a pressure gauge 13, a vacuum gauge 14, a vacuumizing device 15, a gas recovery tank 16, a quartz glass sleeve 16-1, a sealing ring 17, an ultraviolet light lamp tube 18, a thermometer 19, a controller 20, a ballast 21, a lead 22, a purification gas tank 23 and a gas analysis and detection device.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in figure 1, the metal-based ionic liquid supported liquid membrane-photocatalytic composite oil-gas waste gas treatment device is the best embodiment of the invention. Comprises a raw material gas tank 3, a metal-based ionic liquid supported liquid membrane component 1-1 and a photocatalytic reaction device 2-1.
The gas outlet of the raw material gas tank 3 is connected with a gas-oil waste gas inlet pipeline; the oil gas waste gas inlet pipeline comprises an induced draft fan 5, a dust removal device 6, a water removal device 7, an oil gas separation device 8, an adsorption device 9 and a filter 10 which are sequentially connected between the gas outlet of the raw material gas tank 3 and a waste gas inlet 1-2 at the front end of the metal-based ionic liquid supporting liquid membrane component 1-1 through pipelines.
Specifically, the induced draft fan 5 is installed on the air inlet pipeline and used for conveying the oil gas waste gas to be treated to the dust removal device 66.
Specifically, the dust removal device 6 performs gas-solid separation, and further settles suspended particles in the oil gas waste gas, so that the metal-based ionic liquid supported liquid membrane component 1-1 achieves the best purification effect.
Specifically, the water removal device 7 is a high-efficiency water film water removal device, water molecules in oil gas are removed, and corrosion of equipment is avoided.
Specifically, the oil-gas separation device 8 performs oil-gas separation on the raw material gas to remove oil, and further recovers and utilizes the oil.
Specifically, the adsorption device 9 pretreats part of impurity gases in the oil gas waste gas, such as carbon dioxide, so as to improve the degradation efficiency of the oil gas in the metal-based ionic liquid supported liquid membrane component 1-1 and the photocatalytic reaction process.
Specifically, the filter 10 is filter fiber cotton or activated carbon fiber cotton, and is double-layer filter, so that mineralized ions and suspended particles can be prevented from entering the membrane component, damage and blockage of the metal-based ionic liquid supported liquid membrane component 1-1 are avoided, and the service life is prolonged.
The front end of the metal-based ionic liquid supported liquid membrane component 1-1 is provided with a waste gas inlet 1-2, the rear end is provided with a trapped gas outlet 1-4, the top is provided with a permeated gas outlet 1-3, the waste gas inlet 1-2 is communicated with the tail end of an oil gas waste gas inlet pipeline, and the permeated gas outlet 1-3 is connected with a gas recovery pipeline.
Specifically, the metal-based ionic liquid supported liquid membrane component 1-1 consists of a porous membrane component and active components filled in the porous membrane component; the porous membrane component is applicable to hollow fiber type membrane components and tubular membrane components, and the membrane material can be a hydrophobic modified inorganic porous membrane, and can also be a high polymer microporous membrane such as polyvinylidene fluoride (PVDF), polyether sulfone (PES), Polytetrafluoroethylene (PTFE), Polysulfone (PS) and the like. The active component is metal-based ionic liquid, the metal-based ionic liquid is a compound of ionic liquid and metal chloride, the ionic liquid is imidazole type, pyridine type or ammonium salt type ionic liquid, and the metal chloride is silver chloride, copper chloride, ferric chloride, zinc chloride and the like. The invention further prefers a porous hydrophobic hollow fiber membrane, the ionic liquid is imidazole type, the metal chloride is silver chloride, the membrane material is polyvinylidene fluoride, and the length of a single membrane component is 100-400 mm.
Specifically, the preparation method of the metal-based ionic liquid supported liquid membrane comprises the steps of physically heating for 3-20 hours, uniformly mixing the heated ionic liquid with metal chloride, heating and stirring for 1-6 hours, melting until a transparent clear liquid is obtained, and stopping heating to prepare the metal-based ionic liquid. Then the porous membrane is placed in an ultrasonic cleaning device for cleaning for 5-10 minutes and then is placed in a drying oven for drying for 1-2 hours so as to remove impurities in the pipelines and micropores of the porous membrane component and residual air in the membrane pores; and then filling metal-based ionic liquid into the porous membrane on the surface of the porous membrane by using a dipping method so that the porous membrane is completely covered by the metal-based ionic liquid, then drying the porous membrane in a vacuum drying oven for 1 to 2 hours, and then lightly wiping the residual metal-based ionic liquid on the surface of the membrane by using filter paper to obtain the metal-based ionic liquid supported liquid membrane.
Specifically, the gas component for separation of the metal-based ionic liquid supported liquid membrane component 1-1 can be olefin, alkane, cycloalkane, benzene series, and the like.
Specifically, the permeate gas outlet 1-3 is sequentially connected with a vacuum meter 13, a gas flowmeter 11, a vacuumizing device 14 and a gas recovery tank 15 through pipelines. The vacuum pumping device 14 connects the vacuum pump with the gas recovery tank 15, when in use, the vacuum pumping device 14 pumps the metal-based ionic liquid supported liquid membrane assembly 1-1 to vacuum degree of-0.08 MPa, which is used for making the working pressure of the system lower than the external atmospheric pressure.
The photocatalytic reaction device 2-1 comprises a photocatalytic reaction tank body, an ultraviolet light lamp tube 17 and a plurality of baffle plates 2-5 which are arranged at intervals, wherein one end of the photocatalytic reaction tank body is provided with a trapped gas inlet 2-7, the other end of the photocatalytic reaction tank body is provided with a purified gas outlet 2-8, and a purified gas tank 22 is communicated with a pipeline of the purified gas outlet 2-8. The outer peripheral surface of the photocatalytic reaction device 2-1 is also respectively connected with a thermometer 18 and a pressure gauge 12.
Specifically, the photocatalytic reaction device 2-1 is a cylindrical tubular structure and is divided into an upper reaction chamber 2-2 and a lower reaction chamber 2-3, two sides of a butt joint portion of the upper reaction chamber 2-2 and the lower reaction chamber 2-3 are respectively provided with flange edges 2-11 extending outwards, sealing gaskets 2-12 are arranged on the flange edges 2-11, the upper reaction chamber 2-2 and the lower reaction chamber 2-3 of the photocatalytic reaction device 2-1 are fixedly connected in a sealing mode through the flange edges 2-11, the photocatalytic reaction device 2-1 is made of stainless steel, the length is 600-shaped sand glass 1000mm, the diameter is 150-shaped sand glass 200mm, and the wall thickness is 2-5 mm.
Specifically, segmental baffling baffles 2-5 are arranged in the photocatalytic reaction device 2-1 and are respectively fixedly welded on the inner walls of the upper reaction chamber 2-2 and the lower reaction chamber 2-3 and are made of stainless steel.
Specifically, segmental baffle plates 2-5 are staggered to form a continuous curved flow channel, so that oil gas flows in a reaction cavity in a baffling manner, the retention time of the oil gas in the reaction cavity is prolonged, and the photocatalysis efficiency is improved.
Specifically, the quartz glass sleeve 16 is a cylindrical straight tube, and the two ends of the quartz glass sleeve are provided with sealing rings 16-1, so that the quartz glass sleeve 16 is hermetically connected with the side wall of the photocatalytic reaction device 2-1, the length of the quartz glass sleeve 16 is 800-1200mm, the diameter of the quartz glass sleeve is 25-30mm, and the wall thickness of the quartz glass sleeve is 1.5-3 mm.
Specifically, the ultraviolet light tube 17 is sleeved in the quartz glass sleeve 16, and the quartz glass sleeve 16 and the ultraviolet light tube 17 penetrate through the whole reaction chamber together, including the upper reaction chamber 2-2, the lower reaction chamber 2-3, the gas distributor 2-6 and the segmental baffle 2-5, so that the ultraviolet light tube 17 is convenient to disassemble and replace.
Specifically, the gas distributor 2-6 sprays the gas into the reaction chamber uniformly, and is fixedly welded on the inner walls of the upper reaction chamber 2-2 and the lower reaction chamber 2-3, respectively, and is made of stainless steel.
Specifically, the axis of the quartz glass sleeve 16 coincides with the axis of the photocatalytic reaction device 2-1, so that the distance from the ultraviolet light tube 17 to the annular inner wall of the photocatalytic reaction device 2-1 is equal everywhere, the photocatalytic rate of each part in the reaction cavity is basically consistent, and the high efficiency and uniformity of the photocatalytic reaction are ensured.
Specifically, the ultraviolet light tube 17 is a cylindrical straight tube, the ultraviolet light spectrum wavelength range of the ultraviolet light tube 17 is 190nm-400nm, and different organic waste gas components can basically react in the ultraviolet light spectrum range of 190nm-400nm, preferably 254 nm. The specification of the ultraviolet light tube 17 is: the length is 800-1200mm, the diameter is 20-25mm, and the power is 10-150W.
Specifically, the ultraviolet light tube 17 may be a hernia lamp, a mercury lamp, an LED lamp, or the like.
Specifically, the ultraviolet light tube 17 is further connected with a controller 19, a ballast 20 and a conducting wire 21 through a line, and the controller 19 can record and adjust the illumination intensity, the illumination time and the like of the ultraviolet light tube 17 according to the process requirements, so that the purpose of accurate control is achieved. The ballast 20 and the corresponding ultraviolet lamp tube 17 are independently connected through a conducting wire 21 to form a closed loop, and the conducting wire 21 is a copper wire.
Specifically, the annular inner walls of the upper reaction chamber 2-2 and the lower reaction chamber 2-3 of the photocatalytic reaction device 2-1 and the side walls of the segmental baffle plates 2-5 are both attached with photocatalyst films 2-4 mainly made of foam nickel screens or honeycomb aluminum plates, and the photocatalyst is TiO2Or TiO2Preferably foamed nickel mesh and TiO2The dopant of (1).
Specifically, the gas analysis and detection device 23 leads out pipelines from the gas inlet sampling ports 2-9 and the gas outlet sampling ports 2-10 on the side wall of the photocatalytic reaction device 2-1, and gas products can randomly enter the gas analysis and detection device 23 for real-time detection and on-line real-time detection, so that the concentrations of reaction gas and products are detected, and the photocatalytic degradation efficiency is calculated.
Meanwhile, in order to avoid the backflow of the gas in each gas tank, valves 4 are respectively designed on pipelines corresponding to the gas inlet sampling port 2-9, the gas exhaust sampling port 2-10 and the gas inlet of the purification gas tank 22 respectively corresponding to the gas outlet of the raw material gas tank 3, the gas inlet of the gas recovery pipe, the trapped gas outlet 1-4 of the metal-based ionic liquid supported liquid membrane component 1-1 and the gas analysis device.
The metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device comprises the following steps:
firstly, oil gas is conveyed to a dust removal device 6 by an induced draft fan 5 to remove suspended particles contained in the oil gas, then water molecules are removed by a water removal device 7, the oil gas is removed by an oil gas separation device 8, then the oil gas enters an adsorption device 9 to remove partial impurity gas, then the oil gas is conveyed to a filter 10 to be filtered, then the oil gas enters a metal-based ionic liquid supported liquid membrane component 1-1, the downstream side of the metal-based ionic liquid supported liquid membrane component 1-1 is vacuumized by a vacuumizing device 14, partial oil gas components are adsorbed and dissolved on the surface of a membrane feeding side under the pushing of vapor pressure difference at two sides, gas molecules on the surface of the membrane diffuse to the other side of the membrane under the action of concentration difference, the desorbed gas is desorbed and released on the surface of a membrane permeation side; the residual gas which is not dissolved by the metal-based ionic liquid supported liquid membrane component 1-1 is discharged from an intercepted gas outlet 1-4 and enters a photocatalytic reaction device 2-1 through an intercepted gas inlet 2-7, the gas flow direction is shown as the arrow direction in figure 1, the intercepted gas is baffled and moved forward along a segmental baffling baffle 2-5, the gas is slowly baffled to pass through the whole photocatalytic reaction device 2-1 to carry out photocatalytic degradation reaction under the catalytic action of ultraviolet light, so that part of residual waste gas is degraded under the catalytic action of a photocatalyst, and the treated purified gas is finally conveyed to a purification gas tank 22 through a gas exhaust pipeline.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device is characterized in that: comprises a raw material gas tank (3), a metal-based ionic liquid supported liquid membrane component (1-1) and a photocatalytic reaction device (2-1);
an air outlet of the raw material air tank (3) is connected with an oil gas waste gas inlet pipeline;
the metal-based ionic liquid supported liquid membrane component (1-1) is provided with a waste gas inlet (1-2) at the front end, a trapped gas outlet (1-4) at the rear end and a permeated gas outlet (1-3) at the top, the waste gas inlet (1-2) is communicated with the tail end of an oil gas waste gas inlet pipeline, and the permeated gas outlet (1-3) is connected with a gas recovery pipeline;
the photocatalytic reaction device (2-1) comprises a photocatalytic reaction tank body, an ultraviolet light tube (17) and a plurality of baffle plates (2-5) which are arranged at intervals, wherein one end of the photocatalytic reaction tank body is provided with a trapped gas inlet (2-7), the other end of the photocatalytic reaction tank body is provided with a purified gas outlet (2-8), and a pipeline of the purified gas outlet (2-8) is communicated with a purified gas tank (22).
2. The metal-based ionic liquid supported liquid membrane-photocatalytic composite oil-gas exhaust gas treatment device as set forth in claim 1, wherein: the oil gas waste gas inlet pipeline comprises an induced draft fan (5), a dust removal device (6), a water removal device (7), an oil gas separation device (8), an adsorption device (9) and a filter (10), which are sequentially connected between an air outlet of the raw material gas tank (3) and a waste gas inlet (1-2) at the front end of the metal-based ionic liquid supported liquid membrane assembly (1-1) through pipelines; the outlet of the filter (10) is connected with the waste gas inlet (1-2) through a pipeline, and a gas flowmeter (11) and a pressure gauge (12) are further arranged on the pipeline.
3. The metal-based ionic liquid supported liquid membrane-photocatalytic composite oil-gas exhaust gas treatment device as set forth in claim 1, wherein: the metal-based ionic liquid supported membrane component comprises a porous membrane component and an active component filled in the porous membrane component.
4. The metal-based ionic liquid supported liquid membrane-photocatalytic composite oil-gas exhaust gas treatment device as set forth in claim 3, wherein: the porous membrane component is a hollow fiber type membrane component or a tubular type membrane component; the membrane material of the porous membrane component is a hydrophobic modified inorganic porous membrane or a high polymer microporous membrane; the active component is metal-based ionic liquid, and the metal-based ionic liquid is a compound of ionic liquid and metal chloride.
5. The metal-based ionic liquid supported liquid membrane-photocatalytic composite oil-gas exhaust gas treatment device as set forth in claim 1, wherein: the gas recovery pipeline comprises a vacuum meter (13), a gas flowmeter (11), a vacuumizing device (14) and a gas recovery tank (15) which are sequentially connected with the permeation gas outlet (1-3).
6. The metal-based ionic liquid supported liquid membrane-photocatalytic composite oil-gas exhaust gas treatment device as set forth in claim 1, wherein: the inner cavity of the tank body of the photocatalytic reaction device (2-1) is of a cylindrical structure, the ultraviolet light tube (17) penetrates through the axis of the cylindrical structure, and the axis of the ultraviolet light tube (17) and the axis of the cylindrical structure are positioned on the same straight line; a gas distributor (2-6) is fixed at the end part of the inner cavity corresponding to the trapped gas inlet (2-7); the baffle plates (2-5) are in a segmental shape, the round surfaces of the segmental shape are fixedly attached to the inner wall of the tank body, and holes for the ultraviolet light lamp tubes (17) to penetrate through are formed in the willow baffle plates; the opening directions of segmental arch-shaped gaps of two adjacent baffle plates (2-5) are different; the inner walls of the upper reaction chamber (2-2) and the lower reaction chamber (2-3) of the photocatalytic reaction device (2-1) and the side wall of the baffle plate (2-5) are both attached with a photocatalyst film (2-4).
7. The metal-based ionic liquid supported liquid membrane-photocatalytic composite oil-gas exhaust gas treatment device as set forth in claim 6, wherein: the tank body is formed by folding and sealing an upper reaction cavity (2-2) and a lower reaction cavity (2-3), flange edges (2-11) are arranged at the positions, corresponding to the folding positions, of the upper reaction cavity (2-2) and the lower reaction cavity (2-3), and a sealing gasket (2-12) is arranged between the flange edges (2-11) of the upper reaction cavity (2-2) and the flange edges (2-11) of the lower reaction cavity (2-3).
8. The metal-based ionic liquid supported liquid membrane-photocatalytic composite oil-gas exhaust gas treatment device as set forth in claim 6, wherein: the ultraviolet light tube (17) is also externally provided with a quartz glass sleeve (16), the quartz glass sleeve (16) penetrates through a hole in the baffling baffle (2-5) and is hermetically connected with the quartz glass sleeve (16) and two ends of the tank body of the photocatalytic reaction device (2-1) through a sealing ring (16-1), and the axis of the quartz glass sleeve (16) is superposed with the axis of the cylindrical structure.
9. The metal-based ionic liquid supported liquid membrane-photocatalytic composite oil-gas exhaust gas treatment device as set forth in claim 6, wherein: the ultraviolet lamp tube circuit is connected with a controller (19), a ballast (20) and a lead (21).
10. The metal-based ionic liquid supported liquid membrane-photocatalytic composite oil-gas exhaust gas treatment device as set forth in claim 6, wherein: an air inlet sampling port (2-9) is arranged on a trapped gas inlet (2-7) of the photocatalytic reaction device (2-1), an exhaust sampling port (2-10) is arranged on a purified gas outlet (2-8), and the air inlet sampling port (2-9) and the exhaust sampling port (2-10) are respectively communicated with a gas analysis and detection device (23) through an air guide pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010700611.2A CN111871155A (en) | 2020-07-20 | 2020-07-20 | Metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010700611.2A CN111871155A (en) | 2020-07-20 | 2020-07-20 | Metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111871155A true CN111871155A (en) | 2020-11-03 |
Family
ID=73155048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010700611.2A Pending CN111871155A (en) | 2020-07-20 | 2020-07-20 | Metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111871155A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1552875A1 (en) * | 2004-01-08 | 2005-07-13 | Korea Institute of Science and Technology | Facilitated transport membranes for an alkene hydrocarbon separation |
| CN206081719U (en) * | 2016-10-19 | 2017-04-12 | 华南师范大学 | An organic waste gas purifier |
| CN106902648A (en) * | 2017-04-01 | 2017-06-30 | 浙江大学 | Prepare method and its application of ionic liquid/transition metal dichalcogenide gas separation membrane |
| CN107213752A (en) * | 2016-03-22 | 2017-09-29 | 天津工业大学 | The apparatus and method of liquid absorption cooperative with ultraviolet radiation catalytic degradation VOC |
| CN111111477A (en) * | 2018-11-01 | 2020-05-08 | 中国科学院过程工程研究所 | Olefin/alkane separation membrane and preparation method thereof |
| CN210473551U (en) * | 2019-06-25 | 2020-05-08 | 北京瑞斯壮环保设备有限公司 | VOC exhaust treatment device |
| CN111185090A (en) * | 2020-02-21 | 2020-05-22 | 中物院成都科学技术发展中心 | Device for photocatalytic degradation of organic waste gas and application method thereof |
-
2020
- 2020-07-20 CN CN202010700611.2A patent/CN111871155A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1552875A1 (en) * | 2004-01-08 | 2005-07-13 | Korea Institute of Science and Technology | Facilitated transport membranes for an alkene hydrocarbon separation |
| CN107213752A (en) * | 2016-03-22 | 2017-09-29 | 天津工业大学 | The apparatus and method of liquid absorption cooperative with ultraviolet radiation catalytic degradation VOC |
| CN206081719U (en) * | 2016-10-19 | 2017-04-12 | 华南师范大学 | An organic waste gas purifier |
| CN106902648A (en) * | 2017-04-01 | 2017-06-30 | 浙江大学 | Prepare method and its application of ionic liquid/transition metal dichalcogenide gas separation membrane |
| CN111111477A (en) * | 2018-11-01 | 2020-05-08 | 中国科学院过程工程研究所 | Olefin/alkane separation membrane and preparation method thereof |
| CN210473551U (en) * | 2019-06-25 | 2020-05-08 | 北京瑞斯壮环保设备有限公司 | VOC exhaust treatment device |
| CN111185090A (en) * | 2020-02-21 | 2020-05-22 | 中物院成都科学技术发展中心 | Device for photocatalytic degradation of organic waste gas and application method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101354680B1 (en) | Carbon dioxide separating apparatus using silicone separators | |
| CN102824830B (en) | The tubular reactor of ultraviolet degradation waste gas and method thereof | |
| CN1785480A (en) | Membrane adsorption natural gas desulfur method | |
| CN110772987A (en) | Treatment system and process for unstable large-gas-volume VOCs waste gas | |
| CN103316586B (en) | The device and method of organic pollution in a kind of Purge gas | |
| CN107213752A (en) | The apparatus and method of liquid absorption cooperative with ultraviolet radiation catalytic degradation VOC | |
| CN203307143U (en) | Catalytic oxidation wastewater treatment device | |
| CN202146710U (en) | Phosphine gas purifier | |
| CN111871155A (en) | Metal-based ionic liquid supported liquid membrane-photocatalytic composite oil gas waste gas treatment device | |
| CN111617613B (en) | Method and system for treating waste gas of refining and chemical enterprises | |
| CN207591590U (en) | A kind of compound photodegradation-oxidation equipment | |
| CN102824831B (en) | The box Photoreactor of ultraviolet photolysis process waste gas and method thereof | |
| CN212790409U (en) | Waste gas treatment device for coal chemical industry sewage treatment | |
| CN213231883U (en) | Device for treating wastewater based on physical adsorption coupling photo-Fenton oxidation technology | |
| CN211725254U (en) | Aluminum veneer spraying paint waste gas treatment system | |
| CN210522121U (en) | Exhaust gas purification device for coking plant desulfurization workshop | |
| CN203002191U (en) | Tubular reactor for waste gas degradation by ultraviolet light | |
| CN212283562U (en) | Industrial volatile organic waste gas treatment system | |
| CN204841385U (en) | Industrial waste gas purifies environment -friendly device | |
| CN211636015U (en) | Integrated processing apparatus of useless warehouse waste gas of danger | |
| CN211274603U (en) | Baffling multi-pass type photocatalytic oxidation pollutant degradation processor | |
| CN202803242U (en) | Box-type photo-reactor for treating waste gases by ultraviolet photolysis | |
| CN210434305U (en) | Low concentration organic waste gas treatment system | |
| CN111744317A (en) | Filtering and purifying device for treating mercury-containing industrial waste gas | |
| CN211159284U (en) | Underground garage exhaust treatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201103 |
|
| RJ01 | Rejection of invention patent application after publication |