CN114028906A - Organic waste gas coupling formula integration processing apparatus - Google Patents
Organic waste gas coupling formula integration processing apparatus Download PDFInfo
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- CN114028906A CN114028906A CN202111425960.9A CN202111425960A CN114028906A CN 114028906 A CN114028906 A CN 114028906A CN 202111425960 A CN202111425960 A CN 202111425960A CN 114028906 A CN114028906 A CN 114028906A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—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 electrical effects other than those provided for in group B01D61/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/10—Single element gases other than halogens
- B01D2257/106—Ozone
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
An organic waste gas coupling type integrated treatment device comprises a cavity, a purification device, an air duct and a circulating device; the purifying device is arranged in the cavity, the vent pipe penetrates through the cavity, the purifying device is arranged on the vent pipe positioned in the cavity, the purifying device comprises a first activated carbon net, an anode electro-catalysis net, a second activated carbon net and a cathode which are sequentially arranged on the vent pipe, or the purifying device comprises an anode electro-catalysis net, a first activated carbon net, a second activated carbon net and a cathode which are sequentially arranged on the vent pipe; one end of the circulating device is connected with one end of the cathode, and the other end of the cathode is connected with the other end of the circulating device. According to the invention, the inner wall of the cavity and the purification device in the cavity form an air circulation area which can take redundant heat out of the device, so that the circulation of waste gas is prevented from being influenced; by using the first activated carbon net, the second activated carbon net and the anode catalytic net together, the purification efficiency of waste gas is effectively improved, and the pollution gas is purified more thoroughly.
Description
Technical Field
The invention belongs to the technical field of waste gas treatment, and particularly relates to an organic waste gas coupling type integrated treatment device.
Background
With the development of industrialization in China, a large amount of waste gas generated in industrial production is discharged into the atmosphere, so that the air quality is greatly reduced, and the living trip of people is seriously influenced. Part of the waste gas contains some organic matters, which are easy to stimulate the respiratory tract in the human body to damage the heart and lung functions except the harm of the environment, and thus great threat is generated to the health of people. In some industrial parks, the exhaust gases are discharged directly into the atmosphere without treatment, so that air pollution becomes more and more serious.
The waste gas adsorption technology is to introduce waste gas into an adsorption material with a certain microporous structure, further adsorb harmful substances in the air on the surface of the material, filter the pollutants and fully separate the pollutants from the air. The adsorption technology is widely applied to enterprise production as a mature technology. But physical adsorption is limited in the use process due to the influence of the adsorption medium.
In addition, the chemical combustion technology is to oxidize and convert combustible parts in the waste gas into harmless components and then discharge the harmless components into the atmosphere to reduce pollution. The combustion method can keep the gas at a higher temperature without other combustion promoters, thereby having low cost and simple operation. However, in the practical application process, some new nitrides and sulfides are generated in the combusted gas to cause secondary pollution.
The biological filtration technology is that after waste gas is sent to a filtering facility containing various microorganisms, organic and inorganic parts contained in the waste gas are degraded and converted into non-toxic and pollution-free gas. The technology mainly depends on the purification effect of different types of microorganisms on different components in the waste gas, has a good cleaning effect, but has higher early investment.
Catalytic oxidation of gases is a technical method for achieving evolution of exhaust gases by oxidizing or adsorbing pollutants in the exhaust gases using a catalyst. The catalytic oxidation technology is economical and practical, and the adsorption effect is obvious. In order to avoid secondary pollution, the new toxic substances formed after the harmful substances are adsorbed still need to be effectively and timely treated to achieve the whole waste gas treatment effect.
The existing gas catalytic oxidation treatment process has the following technical problems: each part works independently and cannot meet the requirement of cooperative work; the cycle times are less; the medicament consumption is large; further treatment of the agent having adsorbed the harmful substance is required again; the occupied area of the required structures or equipment is large.
Disclosure of Invention
The invention aims to provide an organic waste gas coupling type integrated treatment device, which is used for solving the defects of the existing technology for removing pollutants, particularly Volatile Organic Compounds (VOC) by physical adsorption of activated carbon.
In order to achieve the purpose, the invention adopts the following technical scheme:
an organic waste gas coupling type integrated treatment device comprises a cavity, a purification device, an air duct and a circulating device; the purifying device is arranged in the cavity, the vent pipe penetrates through the cavity, the purifying device is arranged on the vent pipe positioned in the cavity, the purifying device comprises a first activated carbon net, an anode electro-catalysis net, a second activated carbon net and a cathode which are sequentially arranged on the vent pipe, or the purifying device comprises an anode electro-catalysis net, a first activated carbon net, a second activated carbon net and a cathode which are sequentially arranged on the vent pipe;
one end of the circulating device is connected with one end of the cathode, and the other end of the cathode is connected with the other end of the circulating device.
Furthermore, the cavity is cuboid, and the interior of the cavity is vacuum.
Furthermore, one end of the vent pipe is communicated with the air inlet, an induced draft fan is arranged between one end of the vent pipe and the air inlet, the induced draft fan is arranged outside the cavity, and the other end of the vent pipe is communicated with the air outlet.
Furthermore, the cathode is made of an aluminum plate.
Furthermore, a valve is arranged on the vent pipeline.
Further, the anode electrocatalytic mesh is prepared by the following processes: adding ethanol and tetrabutyl titanate into a reaction kettle, adding a metal oxide nanosheet, heating at 140 ℃ for 12 hours to prepare nanometer powder, adding the nanometer powder into a meshed graphite mold, and then keeping the temperature at 400-660 ℃ for 0.5 hour under the conditions that the vacuum degree is 0.01-0.08 Pa, the sintering pressure is 280-480 MPa and the sintering temperature is 400-660 ℃ to obtain the anode electrocatalysis net with a meshed structure.
Further, the metal oxide nanosheets are Ni, Mn, Fe, Co, Ti, Ni, Pd, Cu or V oxide nanosheets; the dosage ratio of the ethanol to the tetrabutyl titanate to the metal oxide nano-sheet is 150-300 mL: 15-20 mL: 200-300 g.
Further, the first activated carbon net and the second activated carbon net are both prepared by the following processes: powdery wood active carbon particles are poured into a reticular graphite mold, and the graphite mold and the powdery wood active carbon particles are placed into a hot-pressing sintering furnace together for sintering, wherein the vacuum degree in the hot-pressing sintering furnace is 0.01-0.08 Pa, the sintering pressure is 280-480 MPa, the sintering temperature is 400-660 ℃, and the temperature is kept for 0.5 h.
Furthermore, the circulating device comprises an external power supply and a solid salt bridge, wherein the anode of the external power supply is connected with one end of the cathode, the other end of the cathode is connected with one end of the solid salt bridge, and the other end of the solid salt bridge is connected with the cathode of the external power supply.
Further, the solid salt bridge is prepared by the following process: heating agar to dissolve completely, and adding KCl solution or KNO3Stirring the solution until the agar is coagulated; wherein the mass ratio of agar to KCl or agar to KNO3The mass ratio of (A) to (B) is 1: 10.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the inner wall of the cavity and the purification device in the cavity form an air circulation area which can take redundant heat out of the device, so that the circulation of waste gas is prevented from being influenced; the whole device is communicated by an air duct, and the structure is simple and efficient. Through reasonable design, the first activated carbon net, the second activated carbon net and the anode catalytic net are used together, so that the purification efficiency of waste gas is effectively improved, and the purification of the polluted gas is more thorough. The anode catalytic net achieves the effect of removing pollutants through direct oxidation or active oxides generated in the electrolytic process, the first active carbon net eliminates organic matters remained in waste gas through physical adsorption, and the second active carbon net plays a role of secondary absorption of the residual pollutants. Compare in simple activated carbon adsorption, vent pipe's catalytic oxidation has improved holistic scrubbing efficiency, simultaneously through introducing the electric catalytic oxidation effect, oxidizes partly contaminated component before activated carbon adsorption, the consumption of the active carbon that has significantly reduced when passing through the active carbon net, energy-conservation is the environmental protection again.
Furthermore, the vacuum area is arranged in the cavity, so that heat preservation and insulation can be realized, and the adsorption efficiency of the activated carbon is guaranteed.
Furthermore, the anode electro-catalytic net is used as the core of the electro-catalytic oxidation, and the anode electro-catalytic net is a catalytic net formed by one or more metals of Mn, Fe, Co, Ti, Ni, Pd, Cu and V, and has efficient and stable catalytic activity and lower manufacturing cost.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1-an external power supply, 3-a first activated carbon net, 4-a catalytic net, 5-a cathode, 6-an induced draft fan, 7-a salt bridge, 8-a valve, 9-an air duct, 10-an air inlet, 11-an air outlet, 12-a second activated carbon net, 100-a cavity, 101-a purification device and 102-a circulation device.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings, but the scope of the claimed invention is not limited thereto.
Referring to fig. 1, the organic waste gas coupling-type integrated treatment device of the present invention includes a rectangular cavity 100, an induced draft fan 6, a purification device 101, a ventilation pipeline 9, and a circulation device 102. The space inside the chamber 100 is a vacuum region, which can reduce the humidity in the space; the purification apparatus 101 is disposed at a central position inside the chamber 100,
the vent pipe 9 penetrates through the cavity 100, a purification device 101 is arranged on the vent pipe 9 positioned in the cavity 100, and the purification device 101 comprises a valve 8, a first activated carbon net 3, an anode electro-catalysis net 4, a second activated carbon net 12 and a cathode 5 which are sequentially arranged on the vent pipe 9.
The left side and the right side of the anode electro-catalysis net 4 are simultaneously provided with the first activated carbon net 3 and the second activated carbon net 12, so that mutual linkage and complementation among all parts are realized, and the oxidation process of waste gas is realized through electro-catalysis.
9 one ends of vent pipe way are linked together with air inlet 10, and be provided with draught fan 6 between 9 one ends of vent pipe way and the air inlet 10, draught fan 6 sets up in the cavity 100 outside, the 9 other ends of vent pipe way are linked together with gas outlet 11, wherein, first activated carbon net 3 is located the inside front end of whole cavity 100, positive pole electro-catalysis net 4 is located between first activated carbon net 3 and second activated carbon net 12, negative pole 5 is located the inside position that is close to the gas vent of cavity 100, it is inside with leading-in cavity 100 of waste gas by draught fan 6.
After dirty gas passes through breather pipe 9 and gets into positive pole electro-catalysis net 4, partial contamination component passes through the electro-catalysis and is oxidized, and enters into first active carbon net 3 and is reduced by the adsorbed pollutant total amount, and the gas behind first active carbon net 3 is after second active carbon net 12 again, and the scrubbing effect further obtains promoting to the activated carbon adsorption saturation's time has been prolonged, use cost has been reduced. Because the gas after catalytic oxidation can produce a certain content of ozone, the cathode 5 adopts a strong reducing electrode material aluminum plate to reduce the ozone, and the treated gas is finally discharged from the gas outlet 11, thereby completing the purification process of the waste gas.
The circulating device 102 comprises an external power supply 1 and a solid salt bridge 7, wherein the anode of the external power supply 1 is connected with one end of a cathode 5, the other end of the cathode 5 is connected with one end of the solid salt bridge 7, and the other end of the solid salt bridge 7 is connected with the cathode of the external power supply 1 to form a closed loop.
Or the purification device 101 comprises a valve 8, an anode electro-catalysis net 4, a first activated carbon net 3, a second activated carbon net 12 and a cathode 5 which are arranged on the vent pipeline 9 in sequence. The exhaust gas is introduced into the cavity 100 through the ventilation pipeline 9 by the induced draft fan 6, then passes through the first layer of activated carbon net 3, so that part of substances in the exhaust gas are adsorbed, then is oxidized through the anode electro-catalysis net 4 to further reduce pollutants, and then is secondarily adsorbed through the second layer of activated carbon net 3 to enable the exhaust gas to reach the emission standard, and finally is discharged from the gas outlet 11 by reducing harmful substances generated in the catalytic reaction at the last cathode 5. The exhaust gas is finally purified through a plurality of physicochemical reactions under the action of the external power supply 1 and the solid salt bridge 7.
The anode electro-catalytic mesh 4 is made by the following process: the method comprises the steps of respectively placing a solvent and a precursor into different regions of a reaction kettle by a solvothermal method, adding a reactant (nickel oxide nanosheet) into the reaction kettle, heating the mixture at 140 ℃ for 12 hours, dissolving the nickel oxide nanosheet which is originally insoluble by utilizing high pressure generated by solvent steam, and carrying out chemical reaction to prepare nano nickel powder, pouring the prepared nano nickel powder into a reticular graphite mold, placing the nano nickel powder and the graphite mold into a hot-pressing sintering furnace for sintering, wherein the vacuum degree in the hot-pressing sintering furnace is 0.01-0.08 Pa, the sintering pressure is 280-480 MPa, the sintering temperature is 400-660 ℃, keeping the temperature for 0.5 hour, and then cooling the nano nickel powder to room temperature along with the furnace to obtain the anode electrocatalysis net 4 with a reticular structure. Wherein the mass of the nickel oxide nano-sheet is 200-300 g, the volume of the ethanol is 150-300mL, the ethanol mainly provides air pressure, and the volume of the tetrabutyl titanate is 15-20 mL. Preferably, the volume ratio of ethanol to tetrabutyl titanate is 9: 1.
The nickel oxide nanosheets in the present invention may be Mn, Fe, Co, Ti, Ni, Pd, Cu or V oxide nanosheets.
The anode electrocatalysis net 4 of the invention has large specific surface area and high activity, and can be used as a high-efficiency catalyst for electrocatalysis of organic gas.
The first activated carbon net 3 and the second activated carbon net 12 are both prepared by the following processes: and pouring powdery wood active carbon particles into a reticular graphite mold, putting the graphite mold and the powdery wood active carbon particles into a hot-pressing sintering furnace for sintering, wherein the vacuum degree in the hot-pressing sintering furnace is 0.01-0.08 Pa, the sintering pressure is 280-480 MPa, the sintering temperature is 400-660 ℃, and the furnace is cooled to room temperature after heat preservation is carried out for 0.5h, so that the active carbon network with the reticular structure is obtained.
Due to the existence of the vacuum in the cavity 100, the provided humidity and temperature can ensure the stable adsorption efficiency of the activated carbon.
The solid salt bridge 7 is prepared by the following process: heating agar to dissolve completely by water bath heating method, and adding KCl solution or KNO3The solution was stirred well and used as a salt bridge after the agar had coagulated. Wherein the mass ratio of agar to KCl or agar to KNO3The mass ratio of (A) to (B) is 1: 10.
The positions of the anode electro-catalysis net 4 and the first activated carbon net 3 can be replaced mutually or combined according to actual needs, so that the production requirements are met practically, the difference between the positions before and after replacement is that the consumption of the first activated carbon can be reduced by the structure before replacement (the first activated carbon net 3 is positioned in front of the anode electro-catalysis net 4), the consumption of the activated carbon of the first activated carbon net 3 is still large after the position replacement (the first activated carbon net 3 is positioned behind the anode electro-catalysis net 4), but harmful components of electro-catalytic oxidation treatment are reduced, and the catalytic oxidation process is carried out more thoroughly.
The invention realizes effective purification of waste gas through the synergistic effect of the activated carbon net and the catalytic net, and compared with the equipment which independently uses two activated carbon nets, the concentration of the content of Volatile Organic Compounds (VOC) can be adjusted from 64.4mg/m by adding one layer of the second activated carbon net 12 before the adsorption quantity of the activated carbon is not saturated in 20 minutes of introducing industrial waste gas3Reduced to 34.8mg/m3. The device has the advantages of high cooperativity, less material consumption, small occupied area and good treatment effect, reduces the use cost in the waste gas treatment process and avoids secondary pollution.
Claims (10)
1. An organic waste gas coupling type integrated treatment device is characterized by comprising a cavity (100), a purification device (101), an air duct (9) and a circulating device (102); the purification device (101) is arranged in the cavity (100), the vent pipe (9) penetrates through the cavity (100), the purification device (101) is arranged on the vent pipe (9) positioned in the cavity (100), the purification device (101) comprises a first activated carbon net (3), an anode electro-catalysis net (4), a second activated carbon net (12) and a cathode (5) which are sequentially arranged on the vent pipe (9), or the purification device (101) comprises the anode electro-catalysis net (4), the first activated carbon net (3), the second activated carbon net (12) and the cathode (5) which are sequentially arranged on the vent pipe (9);
one end of the circulating device (102) is connected with one end of the cathode (5), and the other end of the cathode (5) is connected with the other end of the circulating device (102).
2. The coupling-type integrated organic waste gas treatment device according to claim 1, wherein the cavity (100) is rectangular, and the inside of the cavity (100) is vacuum.
3. The organic waste gas coupling-type integrated treatment device according to claim 1, wherein one end of the vent pipe (9) is communicated with the gas inlet (10), an induced draft fan (6) is arranged between one end of the vent pipe (9) and the gas inlet (10), the induced draft fan (6) is arranged outside the cavity (100), and the other end of the vent pipe (9) is communicated with the gas outlet (11).
4. The coupled integrated organic waste gas treatment device according to claim 1, wherein the cathode (5) is made of an aluminum plate.
5. The coupled integrated organic waste gas treatment device according to claim 1, wherein a valve (8) is arranged on the ventilation pipeline (9).
6. The organic waste gas coupling type integrated treatment device according to claim 1, wherein the anode electro-catalytic mesh (4) is prepared by the following processes: adding ethanol and tetrabutyl titanate into a reaction kettle, adding a metal oxide nanosheet, heating at 140 ℃ for 12 hours to prepare nanometer powder, adding the nanometer powder into a meshed graphite mold, and then keeping the temperature at 400-660 ℃ for 0.5 hour under the conditions that the vacuum degree is 0.01-0.08 Pa, the sintering pressure is 280-480 MPa and the sintering temperature is 400-660 ℃ to obtain the anode electrocatalysis net (4) with a meshed structure.
7. The organic waste gas coupling-type integrated treatment device of claim 6, wherein the metal oxide nanosheets are Ni, Mn, Fe, Co, Ti, Ni, Pd, Cu or V oxide nanosheets; the dosage ratio of the ethanol to the tetrabutyl titanate to the metal oxide nano-sheet is 150-300 mL: 15-20 mL: 200-300 g.
8. The organic waste gas coupling type integrated treatment device according to claim 1, wherein the first activated carbon net (3) and the second activated carbon net (12) are both prepared by the following processes: powdery wood active carbon particles are poured into a reticular graphite mold, and the graphite mold and the powdery wood active carbon particles are placed into a hot-pressing sintering furnace together for sintering, wherein the vacuum degree in the hot-pressing sintering furnace is 0.01-0.08 Pa, the sintering pressure is 280-480 MPa, the sintering temperature is 400-660 ℃, and the temperature is kept for 0.5 h.
9. The organic waste gas coupling-type integrated treatment device according to claim 1, wherein the circulating device (102) comprises an external power supply (1) and a solid salt bridge (7), wherein the positive electrode of the external power supply (1) is connected with one end of the cathode (5), the other end of the cathode (5) is connected with one end of the solid salt bridge (7), and the other end of the solid salt bridge (7) is connected with the negative electrode of the external power supply (1).
10. The integrated coupled organic waste gas treatment device according to claim 9, wherein the solid salt bridge (7) is prepared by the following steps: heating agar to dissolve completely, and adding KCl solution or KNO3Stirring the solution until the agar is coagulated; wherein the mass ratio of agar to KCl or agar to KNO3The mass ratio of (A) to (B) is 1: 10.
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