CN110743356A - Method for purifying waste gas containing liquid hazardous chemicals - Google Patents
Method for purifying waste gas containing liquid hazardous chemicals Download PDFInfo
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- CN110743356A CN110743356A CN201911054819.5A CN201911054819A CN110743356A CN 110743356 A CN110743356 A CN 110743356A CN 201911054819 A CN201911054819 A CN 201911054819A CN 110743356 A CN110743356 A CN 110743356A
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- waste gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0052—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation
- B01D46/0056—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation with rotational movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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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
- B01D2257/00—Components to be removed
- B01D2257/91—Bacteria; Microorganisms
Abstract
The invention belongs to the technical field of waste gas treatment, and particularly relates to a method for purifying waste gas containing liquid hazardous chemicals, wherein a dehumidifying device adopted by the purifying method comprises a cylindrical hollow filtering bin; a first rotating shaft is rotatably connected in the filtering bin, and a group of alkaline filter screens are uniformly distributed on the circumference of the part of the first rotating shaft, which is positioned in the filtering bin; the two sides of the lower part of the filtering bin are respectively communicated with an air inlet pipe and an exhaust pipe, the air inlet pipe is communicated with high-pressure waste gas through an air valve, and the exhaust pipe is communicated with a next-stage filtering device; when the waste gas in the filter bin is introduced into the air inlet pipe and passes through the filter screen, the acidic waste liquid in the waste gas is absorbed and neutralized by the filter screen, and meanwhile, the waste gas pushes the filter screen to rotate, so that the waste liquid in the waste gas is continuously absorbed by the rotating filter screen, the filtering effect of the filter screen is fully utilized, and the filtering efficiency of the waste gas is further improved.
Description
Technical Field
The invention belongs to the technical field of waste gas treatment, and particularly relates to a method for purifying waste gas containing liquid hazardous chemicals.
Background
In the accident of leakage of the liquid hazardous chemical in the limited space, the hazardous vapor and the leaked liquid exist at the same time and affect each other, and the liquid-containing hazardous chemical waste gas treatment equipment is ideal equipment for handling the accident.
The phenomenon of coexistence of hazardous chemical gas, liquid mist, liquid drops and the like can occur in the processes of chemical production, hazardous chemical production storage and the like, for example, the coexistence of methane, hydrogen sulfide mixed gas and ammonia liquid can be caused by operation deviation in the methane nitrogen washing process; the coexistence of hydrogen sulfide, light hydrocarbon gas mixture, fog drops and the like is easily caused in a sewage pipeline network of a chemical plant, and the development of a purification method for treating waste gas containing liquid hazardous chemicals is of great significance. The liquid in the common waste gas containing liquid dangerous chemicals mainly comprises: the hazardous chemical waste gas is condensed into fog drops, water mist, acid liquor, hydrocarbon liquid drops, benzene series and the like; common toxic and harmful gases include: toxic gases such as hydrogen sulfide, chlorine, ammonia gas and the like, flammable and explosive gases such as methane, propane and the like, and flammable and explosive organic gas such as gasoline, kerosene and benzene series volatile steam and the like.
At present, many researches on removal of organic waste gas are carried out, but a purification method capable of simultaneously removing organic waste gas and acidic waste gas is few, and a purification device is expensive and occupies a large area.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problems that the existing purification method capable of removing organic waste gas and acidic waste gas simultaneously is less, the purification equipment is expensive and the occupied area is large, the invention provides the method for purifying the waste gas containing the liquid hazardous chemicals.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a method for purifying waste gas containing liquid hazardous chemicals, which comprises the following steps:
s1, carrying out water filtration and purification on the waste gas through a dehumidification device, removing liquid-containing components in the waste gas, and neutralizing acidic impurities in the waste gas;
s2, degreasing the waste gas through a metal filter screen;
s3, sterilizing the waste gas by adopting a photocatalytic oxidation technology, and then sterilizing the waste gas at high temperature;
s4, performing secondary water filtration and purification on the waste gas, removing ozone generated in photo-oxidation catalytic filtration, and sterilizing and filtering at high temperature to generate odor after protein burning;
s5, generating negative ions through a negative ion generator, having the effect of actively capturing harmful substances in the waste gas and improving the air cleanliness;
the dehumidification device adopted by the invention comprises a cylindrical hollow filter bin; a first rotating shaft is rotatably connected in the filtering bin, and a group of alkaline filter screens are uniformly distributed on the circumference of the part of the first rotating shaft, which is positioned in the filtering bin; the two sides of the lower part of the filtering bin are respectively communicated with an air inlet pipe and an exhaust pipe, the air inlet pipe is communicated with high-pressure waste gas through an air valve, and the exhaust pipe is communicated with a next-stage filtering device; high-pressure waste gas is introduced into the filtering bin, the waste gas is discharged from the exhaust pipe after being absorbed by the filter screen, acidic liquid in the waste gas is filtered and neutralized, and meanwhile, the filter screen is pushed to rotate, so that the filtering efficiency of the waste gas is increased; during the use, open the pneumatic valve and let in waste gas through the intake pipe and filter the storehouse, when waste gas passes through the filter screen, the acidic waste liquid that contains in the waste gas is absorbed and neutralized by the filter screen, and waste gas promotes the filter screen simultaneously and rotates for the continuous by pivoted filter screen absorption of waste liquid in the waste gas, the filter effect of abundant utilization filter screen, and then increase the filtration efficiency of waste gas.
Preferably, one end of the first rotating shaft, which is positioned outside the filtering bin, is fixedly connected with a first gear; a wear-resistant plastic column is arranged outside the filter bin, a second gear is sleeved on the plastic column and meshed with the first gear, and the transmission ratio of the second gear to the first gear is smaller than zero four; the rotating speed of the filter screen is reduced through the friction force between the second gear and the plastic column, and the filtering efficiency of waste gas is further improved; through the frictional force of No. two gears and plastics post and the frictional force between a gear and No. two gears, further reduce the rotational speed of filter screen to make the waste gas of intake pipe discharged from the blast pipe after being fully filtered by the filter screen, prevent that the filter screen rotational speed is too fast, the quick space from between the adjacent filter screen of following of waste gas flows through, reduces the absorption efficiency of waste liquid in the waste gas, and then further increases the filtration efficiency of waste gas.
Preferably, the top of the filtering bin is communicated with a recovery pipe, and the recovery pipe is communicated with a waste liquid collecting device; a heating wire is arranged at the upper part of the filtering bin, which is close to the recovery pipe, and is connected with a power supply through a controller, and the heating wire is used for heating the filtering net at the upper part of the filtering bin, so that the waste liquid is gasified and then discharged from the recovery pipe, the efficiency of the filtering net for absorbing liquid in the waste gas is further increased, and the filtering efficiency of the waste gas is further increased; the controller controls the heating wires to be electrified and heated, so that the temperature of the part, close to the recovery pipe, of the upper part of the filter bin is raised, and when the filter screen rotates to the upper part of the filter bin, waste liquid in the filter screen is heated and evaporated, and formed waste liquid steam flows out of the recovery pipe and is recovered, so that the pollution of the waste liquid to the environment is reduced; meanwhile, the dried filter screen continues to rotate and absorbs waste liquid in the waste gas, and further the filtering efficiency of the waste gas is increased.
Preferably, the middle part of the filtering bin is provided with a heat insulation belt, the middle part of the heat insulation belt is provided with a vacuum chamber, and the heat transfer to the bottom of the filtering bin is reduced through the heat insulation belt vacuum chamber, so that the heating of waste gas is reduced; one side of the second gear, which is far away from the filtering bin, is fixedly connected with a fan blade, and the fan blade dissipates heat from the bottom of the filtering bin when rotating, so that the filtering efficiency of waste gas is further improved; the heat generated by the heating wire is reduced to be transferred to the bottom of the filtering bin by matching the vacuum chamber with the heat insulation belt, so that the temperature rise of waste gas is reduced, the evaporation of waste liquid in the waste gas is reduced, and the absorption efficiency of the filter screen on the waste liquid is further increased; simultaneously, the rotating shaft drives the first gear to rotate, so that the second gear and the fan blades are driven to rotate, air flow outside the bottom of the filtering bin is increased, temperature rise at the bottom of the filtering bin is further controlled, and therefore filtering efficiency of waste gas is further improved.
Preferably, a first hole is formed in the first rotating shaft and communicated with high-pressure hot air; the pressure of the hot air is the same as the pressure of the exhaust gas; a breather pipe is arranged in the filter screen and is communicated with the first hole, and a group of air injection holes are arranged on the breather pipe; the evaporation efficiency of the waste liquid in the filter screen is further increased by introducing high-pressure hot air, so that the filtering efficiency of the waste gas is further increased; through letting in high-pressure hot-air to a hole, because hot-air pressure is the same with exhaust gas pressure, make hot-air can only be from rotating breather pipe and the fumarole blowout to upper portion, and then increase the flow of high-temperature air in the filter screen, further increase the evaporation rate of the waste liquid in the filter screen that rotates to upper portion, thereby reduce the content of waste liquid in the filter screen, make the filter screen continue to rotate the back increase to waste liquid in the waste gas absorption rate and absorption efficiency, further increase the filtration efficiency of waste gas.
Preferably, the high-pressure hot air introduced into the first hole contains sodium hydroxide powder, and one side of the air jet hole close to the filter screen is fixedly connected with a baffle through a pull rope; the sodium hydroxide powder is adhered to the filter screen after being sprayed out of the air injection holes, so that the efficiency of the filter screen for neutralizing the acidic waste liquid is further increased, and the filtering efficiency of the waste gas is further increased; through the sodium hydroxide powder that carries in the hot-air of high pressure, supply the consumption of alkaline neutralizer in the filter screen, further increase the neutralization efficiency of waste liquid in the waste gas, cooperation stay cord and baffle avoid the sodium hydroxide powder to follow the fumarole and penetrate directly and go out, and then increase the efficiency of sodium hydroxide adhesion on the filter screen, further increase neutralization effect to further increase the filtration efficiency of waste gas.
The invention has the following beneficial effects:
1. according to the method for purifying the waste gas containing the liquid dangerous chemicals, when the waste gas is introduced into the filter bin through the air inlet pipe and passes through the filter screen, acidic waste liquid contained in the waste gas is absorbed and neutralized by the filter screen, and meanwhile, the waste gas pushes the filter screen to rotate, so that the waste liquid in the waste gas is continuously absorbed by the rotating filter screen, the filtering effect of the filter screen is fully utilized, and the filtering efficiency of the waste gas is further improved.
2. According to the method for purifying the waste gas containing the liquid dangerous chemicals, the heat generated by the heating wire is reduced to be transferred to the bottom of the filtering bin by matching the vacuum chamber with the heat insulation belt, so that the temperature rise of the waste gas is reduced, the evaporation of the waste liquid in the waste gas is reduced, and the absorption efficiency of the filter screen on the waste liquid is further increased; simultaneously, the rotating shaft drives the first gear to rotate, so that the second gear and the fan blades are driven to rotate, air flow outside the bottom of the filtering bin is increased, temperature rise at the bottom of the filtering bin is further controlled, and therefore filtering efficiency of waste gas is further improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a perspective view of a dehumidifier employed in the present invention;
FIG. 3 is a sectional view of a dehumidifying apparatus used in the present invention
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a partial enlarged view of FIG. 4 at B;
in the figure: the device comprises a filter bin 1, a first rotating shaft 11, a filter screen 2, an air inlet pipe 12, an exhaust pipe 13, a first gear 14, a plastic column 15, a second gear 16, a recovery pipe 17, a heat insulation belt 18, a vacuum chamber 19, fan blades 110, a first hole 21, a vent pipe 22, an air jet hole 23, a pull rope 24 and a baffle 25.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 5, the method for purifying waste gas containing liquid hazardous chemical substances according to the present invention comprises the following steps:
s1, carrying out water filtration and purification on the waste gas through a dehumidification device, removing liquid-containing components in the waste gas, and neutralizing acidic impurities in the waste gas;
s2, degreasing the waste gas through a metal filter screen;
s3, sterilizing the waste gas by adopting a photocatalytic oxidation technology, and then sterilizing the waste gas at high temperature;
s4, performing secondary water filtration and purification on the waste gas, removing ozone generated in photo-oxidation catalytic filtration, and sterilizing and filtering at high temperature to generate odor after protein burning;
s5, generating negative ions through a negative ion generator, having the effect of actively capturing harmful substances in the waste gas and improving the air cleanliness;
the dehumidifying device adopted by the invention comprises a cylindrical hollow filtering bin 1; a first rotating shaft 11 is rotatably connected in the filtering bin 1, and a group of alkaline filter screens 2 are uniformly distributed on the circumference of the part, located inside the filtering bin 1, of the first rotating shaft 11; the two sides of the lower part of the filtering bin 1 are respectively communicated with an air inlet pipe 12 and an air outlet pipe 13, the air inlet pipe 12 is communicated with high-pressure waste gas through an air valve, and the air outlet pipe 13 is communicated with a next-stage filtering device; high-pressure waste gas is introduced into the filtering bin 1, the waste gas is discharged from the exhaust pipe 13 after being absorbed by the filter screen 2, acidic liquid in the waste gas is filtered and neutralized, and meanwhile, the filter screen 2 is pushed to rotate, so that the filtering efficiency of the waste gas is increased; during the use, open the pneumatic valve and let in filtration storehouse 1 with waste gas through intake pipe 12, when waste gas passes through filter screen 2, the acidic waste liquid that contains in the waste gas is absorbed and neutralized by filter screen 2, and waste gas promotes filter screen 2 simultaneously and rotates for waste liquid in the waste gas is continuous to be absorbed by pivoted filter screen 2, and abundant utilization filter screen 2's filtering action, and then increase the filtration efficiency of waste gas.
As an embodiment of the invention, one end of the first rotating shaft 11, which is positioned outside the filter bin 1, is fixedly connected with a first gear 14; a wear-resistant plastic column 15 is arranged outside the filter bin 1, a second gear 16 is sleeved on the plastic column 15, the second gear 16 is meshed with the first gear 14, and the transmission ratio of the second gear 16 to the first gear 14 is smaller than zero four; the rotating speed of the filter screen 2 is reduced through the friction force between the second gear 16 and the plastic column 15, and the filtering efficiency of waste gas is further improved; through the frictional force of No. two gears 16 and plastic column 15 and the frictional force between No. one gear 14 and No. two gears 16, further reduce the rotational speed of filter screen 2 to make the waste gas of intake pipe 12 discharged from blast pipe 13 after being fully filtered by filter screen 2, prevent that the filter screen 2 rotational speed is too fast, the quick space flow through between adjacent filter screen 2 of following of waste gas reduces the absorption efficiency of waste liquid in the waste gas, and then further increases the filtration efficiency of waste gas.
As an embodiment of the invention, the top of the filtering bin 1 is communicated with a recovery pipe 17, and the recovery pipe 17 is communicated with a waste liquid collecting device; a heating wire is arranged at the upper part of the filtering bin 1 close to the recovery pipe 17 and is connected with a power supply through a controller, and a filter screen at the upper part of the filtering bin 1 is heated through the heating wire, so that waste liquid is gasified and then discharged from the recovery pipe 17, the efficiency of absorbing liquid in waste gas by the filter screen 2 is further increased, and the filtering efficiency of the waste gas is further increased; the controller controls the heating wires to be electrified and heated, so that the temperature of the upper part of the filter bin 1 close to the recovery pipe 17 is raised, and further, when the filter screen 2 rotates to the upper part of the filter bin 1, the waste liquid in the filter screen 2 is heated and evaporated, and the formed waste liquid steam flows out of the recovery pipe 17 and is recovered, so that the pollution of the waste liquid to the environment is reduced; meanwhile, the dried filter screen 2 continues to rotate and absorb waste liquid in the waste gas, and further the filtering efficiency of the waste gas is increased.
As an embodiment of the invention, the middle part of the filtering bin 1 is provided with a heat insulation belt 18, the middle part of the heat insulation belt 18 is provided with a vacuum chamber 19, and the heat transfer to the bottom of the filtering bin 1 is reduced through the heat insulation belt 18 and the vacuum chamber 19, so that the heating of waste gas is reduced; one side of the second gear 16, which is far away from the filtering bin 1, is fixedly connected with a fan blade 110, and the fan blade 110 dissipates heat to the bottom of the filtering bin 1 when rotating, so that the filtering efficiency of waste gas is further improved; the vacuum chamber 19 is matched with the heat insulation belt 18, so that the heat generated by the heating wire is reduced to be transferred to the bottom of the filtering bin 1, the temperature rise of waste gas is further reduced, the evaporation of waste liquid in the waste gas is reduced, and the absorption efficiency of the filter screen 2 on the waste liquid is further increased; meanwhile, the rotating shaft drives the first gear 14 to rotate, so that the second gear 16 and the fan blades 110 are driven to rotate, air flow outside the bottom of the filtering bin 1 is increased, temperature rise of the bottom of the filtering bin 1 is further controlled, and therefore filtering efficiency of waste gas is further improved.
As an embodiment of the invention, a first hole 21 is formed in the first rotating shaft 11, and the first hole 21 is communicated with high-pressure hot air; the pressure of the hot air is the same as the pressure of the exhaust gas; a vent pipe 22 is arranged in the filter screen 2, the vent pipe 22 is communicated with the first hole 21, and a group of air injection holes 23 are formed in the vent pipe 22; the evaporation efficiency of the waste liquid in the filter screen 2 is further increased by introducing high-pressure hot air, so that the filtering efficiency of the waste gas is further increased; through letting in high-pressure hot-air to hole 21, because hot-air pressure is the same with exhaust gas pressure, make hot-air can only be from rotating breather pipe 22 and the fumarole 23 blowout to upper portion, and then increase the flow of high-temperature air in the filter screen 2, further increase the evaporation rate of the waste liquid in the filter screen 2 that rotates to upper portion, thereby reduce the content of waste liquid in the filter screen 2, make filter screen 2 continue to rotate the back increase to waste liquid's in the waste gas absorption rate and absorption efficiency, further increase the filtration efficiency of waste gas.
As an embodiment of the invention, the high-pressure hot air introduced into the first hole 21 contains sodium hydroxide powder, and the side of the air injection hole 23 close to the filter screen 2 is fixedly connected with a baffle 25 through a pull rope 24; the sodium hydroxide powder is sprayed out from the gas spraying holes 23 and then adhered to the filter screen 2, so that the efficiency of the filter screen 2 in neutralizing the acidic waste liquid is further increased, and the filtering efficiency of the waste gas is further increased; through the sodium hydroxide powder that carries in the hot-air of high pressure, supply the consumption of alkaline neutralizer in the filter screen 2, further increase the neutralization efficiency of waste liquid in the waste gas, cooperation stay cord 24 and baffle 25 avoid the sodium hydroxide powder to follow jet orifice 23 and penetrate directly and go out, and then increase the efficiency of sodium hydroxide adhesion on filter screen 2, further increase neutralization effect to further increase the filtration efficiency of waste gas.
When the waste gas filter is used, the gas valve is opened to introduce waste gas into the filter bin 1 through the gas inlet pipe 12, when the waste gas passes through the filter screen 2, acidic waste liquid contained in the waste gas is absorbed and neutralized by the filter screen 2, and meanwhile, the waste gas pushes the filter screen 2 to rotate, so that the waste liquid in the waste gas is continuously absorbed by the rotating filter screen 2, the filtering effect of the filter screen 2 is fully utilized, and the filtering efficiency of the waste gas is further increased; the rotating speed of the filter screen 2 is further reduced through the friction force between the second gear 16 and the plastic column 15 and the friction force between the first gear 14 and the second gear 16, so that the waste gas in the air inlet pipe 12 is fully filtered by the filter screen 2 and then is discharged from the exhaust pipe 13, the rotating speed of the filter screen 2 is prevented from being too high, the waste gas quickly flows through the space between the adjacent filter screens 2, the absorption efficiency of waste liquid in the waste gas is reduced, and the filtering efficiency of the waste gas is further increased; the controller controls the heating wires to be electrified and heated, so that the temperature of the upper part of the filter bin 1 close to the recovery pipe 17 is raised, and further, when the filter screen 2 rotates to the upper part of the filter bin 1, the waste liquid in the filter screen 2 is heated and evaporated, and the formed waste liquid steam flows out of the recovery pipe 17 and is recovered, so that the pollution of the waste liquid to the environment is reduced; meanwhile, the dried filter screen 2 continues to rotate and absorbs the waste liquid in the waste gas, so that the filtering efficiency of the waste gas is further improved; the vacuum chamber 19 is matched with the heat insulation belt 18, so that the heat generated by the heating wire is reduced to be transferred to the bottom of the filtering bin 1, the temperature rise of waste gas is further reduced, the evaporation of waste liquid in the waste gas is reduced, and the absorption efficiency of the filter screen 2 on the waste liquid is further increased; meanwhile, the rotating shaft drives the first gear 14 to rotate, so as to drive the second gear 16 and the fan blades 110 to rotate, increase the air flow outside the bottom of the filtering bin 1, further control the temperature rise of the bottom of the filtering bin 1, and further increase the filtering efficiency of the waste gas; by introducing high-pressure hot air into the first hole 21, the hot air can only be ejected from the vent pipe 22 and the air ejecting hole 23 which rotate to the upper part due to the fact that the hot air pressure is the same as the waste gas pressure, so that the flow of high-temperature air in the filter screen 2 is increased, the evaporation speed of waste liquid in the filter screen 2 which rotates to the upper part is further increased, the content of the waste liquid in the filter screen 2 is reduced, the absorption speed and the absorption efficiency of the waste liquid in the waste gas are increased after the filter screen 2 continues to rotate, and the filtering efficiency of the waste gas is further increased; through the sodium hydroxide powder that carries in the hot-air of high pressure, supply the consumption of alkaline neutralizer in the filter screen 2, further increase the neutralization efficiency of waste liquid in the waste gas, cooperation stay cord 24 and baffle 25 avoid the sodium hydroxide powder to follow jet orifice 23 and penetrate directly and go out, and then increase the efficiency of sodium hydroxide adhesion on filter screen 2, further increase neutralization effect to further increase the filtration efficiency of waste gas.
The front, the back, the left, the right, the upper and the lower are all based on the figure 2 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A method for purifying waste gas containing liquid hazardous chemicals is characterized by comprising the following steps: the method comprises the following steps:
s1, carrying out water filtration and purification on the waste gas through a dehumidification device, removing liquid-containing components in the waste gas, and neutralizing acidic impurities in the waste gas;
s2, degreasing the waste gas through a metal filter screen;
s3, sterilizing the waste gas by adopting a photocatalytic oxidation technology, and then sterilizing the waste gas at high temperature;
s4, performing secondary water filtration and purification on the waste gas, removing ozone generated in photo-oxidation catalytic filtration, and sterilizing and filtering at high temperature to generate odor after protein burning;
s5, generating negative ions through a negative ion generator, having the effect of actively capturing harmful substances in the waste gas and improving the air cleanliness;
the dehumidifying device adopted by the invention comprises a cylindrical hollow filtering bin (1); a first rotating shaft (11) is rotatably connected in the filtering bin (1), and a group of alkaline filter screens (2) are uniformly distributed on the circumference of the part, located in the filtering bin (1), of the first rotating shaft (11); the two sides of the lower part of the filtering bin (1) are respectively communicated with an air inlet pipe (12) and an air outlet pipe (13), the air inlet pipe (12) is communicated with high-pressure waste gas through an air valve, and the air outlet pipe (13) is communicated with a next-stage filtering device; high-pressure waste gas is introduced into the filtering bin (1), the waste gas is absorbed by the filter screen (2) and then discharged from the exhaust pipe (13), acid liquid in the waste gas is filtered and neutralized, and meanwhile, the filter screen (2) is pushed to rotate, so that the filtering efficiency of the waste gas is increased.
2. The method for purifying the waste gas containing the liquid dangerous chemicals according to claim 1, characterized in that: one end of the first rotating shaft (11) positioned outside the filtering bin (1) is fixedly connected with a first gear (14); a wear-resistant plastic column (15) is arranged outside the filtering bin (1), a second gear (16) is sleeved on the plastic column (15), the second gear (16) is meshed with the first gear (14), and the transmission ratio of the second gear (16) to the first gear (14) is smaller than zero four; the rotating speed of the filter screen (2) is reduced through the friction force between the second gear (16) and the plastic column (15), and the filtering efficiency of waste gas is further increased.
3. The method for purifying the waste gas containing the liquid dangerous chemicals according to claim 2, characterized in that: the top of the filtering bin (1) is communicated with a recovery pipe (17), and the recovery pipe (17) is communicated with a waste liquid collecting device; the position that filters storehouse (1) upper portion and is close to recovery tube (17) is equipped with the heater strip, and the heater strip passes through the controller and connects the power, heats the filter screen that filters storehouse (1) upper portion through the heater strip for discharge from recovery tube (17) after the waste liquid gasification, further increase filter screen (2) and absorb the efficiency of liquid in the waste gas, thereby further increase the filtration efficiency of waste gas.
4. The method for purifying the waste gas containing the liquid dangerous chemicals according to claim 3, wherein the method comprises the following steps: the middle part of the filtering bin (1) is provided with a heat insulation belt (18), the middle part of the heat insulation belt (18) is provided with a vacuum chamber (19), and the heat transfer to the bottom of the filtering bin (1) is reduced through the heat insulation belt (18) and the vacuum chamber (19), so that the heating of waste gas is reduced; no. two gear (16) keep away from one side of filtering storehouse (1) and have linked firmly flabellum (110), and flabellum (110) dispel the heat to filtering storehouse (1) bottom when rotating, further increase the filtration efficiency of waste gas.
5. The method for purifying the waste gas containing the liquid dangerous chemicals according to claim 2, characterized in that: a first hole (21) is formed in the first rotating shaft (11), and the first hole (21) is communicated with high-pressure hot air; the pressure of the hot air is the same as the pressure of the exhaust gas; a vent pipe (22) is arranged in the filter screen (2), the vent pipe (22) is communicated with the first hole (21), and a group of air injection holes (23) are formed in the vent pipe (22); the evaporation efficiency of the waste liquid in the filter screen (2) is further increased by introducing high-pressure hot air, so that the filtering efficiency of the waste gas is further increased.
6. The method for purifying the waste gas containing the liquid dangerous chemicals according to claim 5, wherein the method comprises the following steps: high-pressure hot air introduced into the first hole (21) contains sodium hydroxide powder, and one side of the air injection hole (23) close to the filter screen (2) is fixedly connected with a baffle (25) through a pull rope (24); the sodium hydroxide powder is adhered to the filter screen (2) after being sprayed out of the air spraying holes (23), so that the efficiency of the filter screen (2) for neutralizing the acid waste liquid is further increased, and the filtering efficiency of the waste gas is further increased.
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| CN113082993A (en) * | 2021-03-30 | 2021-07-09 | 江苏大橡木集团有限公司 | Laboratory waste gas integration purifier |
| CN113466408A (en) * | 2021-06-23 | 2021-10-01 | 新疆生产建设兵团第八师生态环境监测站(石河子市生态环境监测站) | Mobile atmospheric ozone monitoring and processing device and method |
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