CN108905576B - Organic waste gas treatment process - Google Patents
Organic waste gas treatment process Download PDFInfo
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- CN108905576B CN108905576B CN201810816479.4A CN201810816479A CN108905576B CN 108905576 B CN108905576 B CN 108905576B CN 201810816479 A CN201810816479 A CN 201810816479A CN 108905576 B CN108905576 B CN 108905576B
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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
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
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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
- B01D2253/25—Coated, impregnated or composite adsorbents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
Abstract
The invention discloses an organic waste gas treatment process, which comprises the following steps: (1) organic waste gas is subjected to primary absorption, and a certain primary absorption liquid absorbs equivalent organic waste gas; absorbing alkali liquor in the treated gas phase, and recycling the treated liquid phase; (2) through secondary spraying, alkali liquor absorbs equivalent organic waste gas; carrying out adsorption reaction on the treated gas phase, and recycling the treated liquid phase; (3) through specific three-stage adsorption, the treated gas phase reaches the discharge standard, and the treated non-woven cloth bag can be recycled; (4) the liquid phase after the primary absorption treatment and the secondary spraying treatment is specially adjusted to ensure that the organic waste gas dissolved in the liquid phase overflows, and the overflowed organic waste gas, the non-woven cloth bag after the three-stage absorption treatment, the zeolite powder and the copper oxide nano particles are combusted in a combustion zone, so that the method has the advantage of reducing the cost.
Description
Technical Field
The invention relates to an organic waste gas treatment process.
Background
Organic waste gas is generated in the production and manufacturing processes of various industries, and most enterprises in the prior art adopt a direct discharge mode or a direct discharge mode after simple treatment, which has great harm to the environment. Chinese patent with application publication No. CN107930313A and application publication date of 2018, 4 and 20 discloses a volatile organic waste gas treatment system, which adopts a four-component spray tower and a UV photolysis and plasma treatment combination machine for treatment.
The defects of the prior art are that the cost of the UV photolysis and plasma treatment combined machine is high, the burden on small and medium-sized enterprises is high, and the small and medium-sized enterprises have no application value in the treatment of organic waste gas. Therefore, the development of a low-cost organic waste gas method has great production and application values.
Disclosure of Invention
The invention aims to provide an organic waste gas treatment process which has the advantage of reducing cost.
The technical purpose of the invention is realized by the following technical scheme:
an organic waste gas treatment process, comprising the following steps:
(1) primary absorption
Organic waste gas enters the primary absorption tank from the bottom of the primary absorption tank, gas phase obtained by absorption is discharged into the absorption tower from a pipeline arranged at the top of the primary absorption tank, and stainless steel corrugated packing is arranged in the primary absorption tank; the primary absorption tank is filled with primary absorption liquid, and the primary absorption liquid comprises 0.5-0.6 wt% of SDS, 0.1-0.2 wt% of polytetrafluoroethylene, 0.1-0.2 wt% of release paper scraps and 99.0-99.3% of saturated lime water; the liquid-gas flow ratio of the primary absorption liquid to the organic waste gas is 1: 700-800;
when the concentration of the organic waste gas in the primary absorption tank is increased to 10g/l, the primary absorption liquid enters an absorption liquid collection tank from a pipeline arranged at the bottom of the primary absorption tank;
(2) absorption of lye
Gas phase obtained after primary absorption enters the absorption tower from the bottom of the absorption tower to be sequentially subjected to primary spray absorption and secondary spray absorption, and the middle part and the upper part of the absorption tower are respectively sprayed with first spray liquid from a first alkali liquor tank and second spray liquid from a second alkali liquor tank; gas phase obtained after the secondary spraying absorption is discharged into the absorption tower from a pipeline arranged at the top of the absorption tower; the liquid-gas flow ratio of the first spraying liquid to the gas phase obtained after primary absorption to the second spraying liquid to the gas phase obtained after primary absorption is 1: 200-250;
the second spraying liquid in the second alkali liquid tank is fresh alkali liquid from an external environment, and the fresh alkali liquid is saturated lime water; mixing liquid phases obtained after the secondary spraying absorption and then entering a first alkali liquor tank as first spraying liquid, and when the concentration of VOCs in the first spraying liquid is increased to 5g/l, entering the first spraying liquid into a spraying liquid collecting tank from a pipeline arranged at the bottom of the first alkali liquor tank;
(3) adsorption
Gas phase obtained after secondary spraying absorption enters the absorption tower from the bottom of the absorption tower to be sequentially subjected to primary absorption, secondary absorption and tertiary absorption, and a first absorption plate, a second absorption plate and a third absorption plate are sequentially arranged in the absorption tower from bottom to top;
the first adsorption plate comprises a first support plate which is adaptive to the cross section of the adsorption tower and a first non-woven cloth bag which is arranged on the first support plate and is adaptive to the cross section of the adsorption tower, and activated carbon is filled in the first non-woven cloth bag;
the second adsorption plate comprises a second support plate adaptive to the cross section of the adsorption tower and a second non-woven fabric bag which is arranged on the second support plate and adaptive to the cross section of the adsorption tower, a mixture of activated carbon, calcium chloride powder, nanoscale polyaluminium chloride and polyacrylonitrile fibers is filled in the second non-woven fabric bag, and the mass ratio of the activated carbon to the calcium chloride powder to the nanoscale polyaluminium chloride to the polyacrylonitrile fibers is 100: 5-6: 10-12: 2-3;
the third adsorption plate comprises a third support plate adaptive to the cross section of the adsorption tower and a third non-woven fabric bag which is arranged on the third support plate and adaptive to the cross section of the adsorption tower, and the third non-woven fabric bag is filled with a mixture of activated carbon, calcium chloride powder, nanoscale polyaluminium chloride, polyacrylonitrile fiber, polyvinyl alcohol, ceramic powder and wheat bran, wherein the mass ratio of the activated carbon to the calcium chloride powder to the nanoscale polyaluminium chloride to the polyacrylonitrile fiber to the polyvinyl alcohol to the ceramic powder to the wheat bran is 100: 5-6: 10-12: 2-3: 1-2: 2-3;
the gas phase obtained after the tertiary adsorption can be directly discharged into the air, and the first non-woven cloth bag, the second non-woven cloth bag and the third non-woven cloth bag obtained after adsorption are detached for reutilization treatment;
(4) reuse of
Conveying an absorption liquid collecting tank and a spraying liquid collecting tank to a recycling area, pumping primary absorption liquid in the absorption liquid collecting tank into a treatment tank from the bottom of the treatment tank, pumping second spraying liquid in the spraying liquid collecting tank into the treatment tank from the bottom of the treatment tank, adding acid liquid into the treatment tank to adjust the pH value to 6.8-7.0, and allowing organic waste gas in the treatment tank to overflow and enter a combustion area from a pipeline arranged at the top of the treatment tank;
putting the detached first non-woven cloth bag, second non-woven cloth bag and third non-woven cloth bag into a combustion zone, and adding zeolite powder and copper oxide nanoparticles into the combustion zone; the mass ratio of the total amount of the first non-woven cloth bag, the second non-woven cloth bag and the third non-woven cloth bag, the organic waste gas overflowing from the treatment tank, the zeolite powder and the copper oxide nanoparticles is 100: 25-30: 1-2: 0.4-0.5;
and (3) charging sufficient air into the combustion zone, combusting at 200-225 ℃, and recycling heat energy obtained by combustion through heat exchange.
More preferably: the stainless steel corrugated packing is coated with an absorption layer, and the absorption layer is prepared by the following method: mixing styrene, methyl methacrylate, gelatin, starch and toluene according to the mass ratio of 100: 30-35: 0.5-0.6: 0.3-0.4: 2-3, heating to soften, and stirring for reaction for 1.5-2.0 hr to obtain the product.
More preferably: the second non-woven fabric bag is further filled with sodium alginate and sodium diatomate, and the mass ratio of the activated carbon, the calcium chloride powder, the nano-grade polyaluminium chloride, the polyacrylonitrile fiber, the sodium alginate and the sodium diatomate is 100: 5-6: 10-12: 2-3: 1-2;
the third non-woven fabric bag is further filled with sodium alginate, sodium diatomate and sodium bicarbonate, wherein the mass ratio of the activated carbon, calcium chloride powder, nano-grade polyaluminum chloride, polyacrylonitrile fiber, polyvinyl alcohol, ceramic powder, wheat bran, the sodium alginate, the sodium diatomate and the sodium bicarbonate is 100: 5-6: 10-12: 2-3: 1-2: 2-3: 1-2: 3-4.
More preferably: the top of the adsorption tower is connected with a reabsorption tank through a pipeline, gas phase obtained after three-stage adsorption in the adsorption tower enters the reabsorption tank from an inlet on one side of the reabsorption tank, is adsorbed by a reabsorption plate vertically arranged in the reabsorption tank, and is discharged into the air from an outlet on one side, far away from the inlet, of the reabsorption tank;
the reabsorption plate comprises a reabsorption carrier plate which is matched with the longitudinal section of the reabsorption tank and coatings coated on two sides of the reabsorption carrier plate, the thickness of the coatings is 4-5 mm, and the coatings comprise 20-22 wt% of magnesium oxide, 30-32 wt% of aluminum oxide and 46-50 wt% of magnesium chloride.
In conclusion, the invention has the following beneficial effects:
1. the traditional alkali liquor absorption, adsorption and combustion combined treatment is adopted, the whole line is replaced and modified only by improving the structure and the material of each step, the cost is reduced, meanwhile, the method can be used by improving the existing treatment equipment of medium and small enterprises, the modification cost is reduced, and the popularization is facilitated;
2. the treatment method can better purify the organic waste gas, has negligible emission and environmental friendliness, and is obviously superior to the prior art;
3. the treatment method can fully reuse the organic waste gas, improve the utilization rate of the organic waste gas, reduce the secondary pollution after combustion, and simultaneously, the temperature during combustion is obviously lower than that of the prior art, thereby saving energy and reducing consumption.
Drawings
FIG. 1 is a schematic view of the construction of a primary absorption, liquid absorption and adsorption apparatus of example 1;
FIG. 2 is a schematic view of the construction of a recycling apparatus according to embodiment 1;
FIG. 3 is a schematic view of the structure of the primary absorption, liquid absorption and adsorption apparatus of example 4.
1. A primary absorber tank; 2. an absorption liquid collection tank; 3. an absorption tower; 4. a first lye tank; 5. a second lye tank; 6. a spray liquid collection tank; 7. an adsorption tower; 8. a treatment tank; 9. a combustion zone; 10. And adsorbing the tank again.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the present invention.
Example 1: an organic waste gas treatment process, referring to fig. 1 and 2, comprises the following steps:
(1) primary absorption
Organic waste gas enters the primary absorption tank 1 from the bottom of the primary absorption tank 1, gas phase obtained by absorption is discharged into the absorption tower 3 from a pipeline arranged at the top of the primary absorption tank 1, and stainless steel corrugated packing is arranged in the primary absorption tank 1; the primary absorption tank 1 is filled with primary absorption liquid, and the primary absorption liquid comprises 0.5wt% of SDS, 0.1wt% of polytetrafluoroethylene, 0.2wt% of release paper scrap and 99.3% of saturated lime water; the liquid-gas flow ratio of the primary absorption liquid to the organic waste gas is 1: 800;
when the concentration of the organic waste gas in the primary absorption tank 1 is increased to 10g/l, the primary absorption liquid enters the absorption liquid collecting tank 2 from a pipeline arranged at the bottom of the primary absorption tank 1;
(2) absorption of lye
Gas phase obtained after primary absorption enters the absorption tower 3 from the bottom of the absorption tower 3 to be sequentially subjected to primary spray absorption and secondary spray absorption, and the middle part and the upper part of the absorption tower 3 are respectively sprayed with first spray liquid from a first alkali liquor tank 4 and second spray liquid from a second alkali liquor tank 5; the gas phase obtained after the secondary spraying absorption is discharged into the absorption tower 7 from a pipeline arranged at the top of the absorption tower 3; the liquid-gas flow ratio of the first spraying liquid to the gas phase obtained after primary absorption to the second spraying liquid to the gas phase obtained after primary absorption is 1: 200;
the second spraying liquid in the second lye tank 5 is fresh lye from an external environment, and the fresh lye is saturated lime water; mixing liquid phases obtained after secondary spraying absorption and then entering a first alkali liquor tank 4 as first spraying liquid, and when the concentration of VOCs in the first spraying liquid is increased to 5g/l, entering the first spraying liquid into a spraying liquid collecting tank 6 from a pipeline arranged at the bottom of the first alkali liquor tank 4;
(3) adsorption
Gas phase obtained after the secondary spraying absorption enters the absorption tower 7 from the bottom of the absorption tower 7 to be sequentially subjected to primary absorption, secondary absorption and tertiary absorption, and a first absorption plate, a second absorption plate and a third absorption plate are sequentially arranged in the absorption tower 7 from bottom to top;
the first adsorption plate comprises a first support plate which is adaptive to the cross section of the adsorption tower 7 and a first non-woven cloth bag which is arranged on the first support plate and is adaptive to the cross section of the adsorption tower 7, and activated carbon is filled in the first non-woven cloth bag;
the second adsorption plate comprises a second support plate which is adaptive to the cross section of the adsorption tower 7 and a second non-woven fabric bag which is arranged on the second support plate and is adaptive to the cross section of the adsorption tower 7, and a mixture of activated carbon, calcium chloride powder, nano-grade polyaluminium chloride and polyacrylonitrile fiber is filled in the second non-woven fabric bag, wherein the mass ratio of the activated carbon to the calcium chloride powder to the nano-grade polyaluminium chloride to the polyacrylonitrile fiber is 100:5:10: 2;
the third adsorption plate comprises a third support plate adaptive to the cross section of the adsorption tower 7 and a third non-woven fabric bag which is arranged on the third support plate and adaptive to the cross section of the adsorption tower 7, and the third non-woven fabric bag is filled with a mixture of activated carbon, calcium chloride powder, nano-grade polyaluminium chloride, polyacrylonitrile fiber, polyvinyl alcohol, ceramic powder and wheat bran, wherein the mass ratio of the activated carbon, the calcium chloride powder, the nano-grade polyaluminium chloride, the polyacrylonitrile fiber, the polyvinyl alcohol, the ceramic powder and the wheat bran is 100:5:10:2:1:2: 2;
the gas phase obtained after the tertiary adsorption can be directly discharged into the air, and the first non-woven cloth bag, the second non-woven cloth bag and the third non-woven cloth bag obtained after adsorption are detached for reutilization treatment;
(4) reuse of
Conveying an absorption liquid collecting tank 2 and a spraying liquid collecting tank 6 to a recycling area, pumping primary absorption liquid in the absorption liquid collecting tank 2 into a treatment tank 8 from the bottom of the treatment tank 8, pumping second spraying liquid in the spraying liquid collecting tank 6 into the treatment tank 8 from the bottom of the treatment tank 8, adding acid liquid into the treatment tank 8 to adjust the pH value to 6.8, and enabling organic waste gas in the tank 8 to be treated to overflow and enter a combustion area 9 from a pipeline arranged at the top of the treatment tank 8;
putting the detached first non-woven cloth bag, second non-woven cloth bag and third non-woven cloth bag into a combustion zone 9, and adding zeolite powder and copper oxide nanoparticles into the combustion zone 9; the mass ratio of the total amount of the first non-woven cloth bag, the second non-woven cloth bag and the third non-woven cloth bag, the organic waste gas overflowing from the treatment tank 8, the zeolite powder and the copper oxide nano particles is 100:25:1: 0.4;
sufficient air is charged into the combustion zone 9 and combusted at 225 c, and the heat energy from the combustion is reused by heat exchange.
Example 2: an organic waste gas treatment process is different from the process of example 1 in that a stainless steel corrugated packing is coated with an absorption layer, and the absorption layer is prepared by the following method: mixing styrene, methyl methacrylate, gelatin, starch and toluene at a mass ratio of 100:30:0.5:0.3:2, heating to soften, and stirring for reaction for 1.5 hr.
Example 3: an organic waste gas treatment process is different from that in the embodiment 2, the second non-woven fabric bag is also filled with sodium alginate and sodium diatomate, and the mass ratio of the activated carbon, the calcium chloride powder, the nano-grade polyaluminum chloride, the polyacrylonitrile fiber, the sodium alginate and the sodium diatomate is 100:5:10:2:1: 1;
the third non-woven fabric bag is also filled with sodium alginate, sodium diatomate and sodium bicarbonate, wherein the mass ratio of the activated carbon, calcium chloride powder, nano-grade polyaluminum chloride, polyacrylonitrile fiber, polyvinyl alcohol, ceramic powder, wheat bran, the sodium alginate, the sodium diatomate and the sodium bicarbonate is 100:5:10:2:1:2:2:1:1: 3.
Example 4: an organic waste gas treatment process, with reference to fig. 3, is different from embodiment 3 in that the top of an adsorption tower 7 is connected with a reabsorption tank 10 through a pipeline, a gas phase obtained after three-stage adsorption in the adsorption tower 7 enters the reabsorption tank 10 from an inlet on one side of the reabsorption tank 10, is adsorbed by a reabsorption plate vertically arranged in the reabsorption tank 10, and is then discharged into the air from an outlet on one side of the reabsorption tank 10, which is far away from the inlet;
the reabsorption plate comprises a reabsorption carrier plate which is adaptive to the longitudinal section of the reabsorption tank 10 and coatings coated on two sides of the reabsorption carrier plate, the thickness of the coatings is 4mm, and the coatings comprise 22wt% of magnesium oxide, 32wt% of aluminum oxide and 46wt% of magnesium chloride.
Example 5: an organic waste gas treatment process, comprising the following steps:
(1) primary absorption
Organic waste gas enters the primary absorption tank 1 from the bottom of the primary absorption tank 1, gas phase obtained by absorption is discharged into the absorption tower 3 from a pipeline arranged at the top of the primary absorption tank 1, and stainless steel corrugated packing is arranged in the primary absorption tank 1; the primary absorption tank 1 is filled with primary absorption liquid, and the primary absorption liquid comprises 0.6wt% of SDS, 0.2wt% of polytetrafluoroethylene, 0.2wt% of release paper scrap and 99.0% of saturated lime water; the liquid-gas flow ratio of the primary absorption liquid to the organic waste gas is 1: 700;
when the concentration of the organic waste gas in the primary absorption tank 1 is increased to 10g/l, the primary absorption liquid enters the absorption liquid collecting tank 2 from a pipeline arranged at the bottom of the primary absorption tank 1;
(2) absorption of lye
Gas phase obtained after primary absorption enters the absorption tower 3 from the bottom of the absorption tower 3 to be sequentially subjected to primary spray absorption and secondary spray absorption, and the middle part and the upper part of the absorption tower 3 are respectively sprayed with first spray liquid from a first alkali liquor tank 4 and second spray liquid from a second alkali liquor tank 5; the gas phase obtained after the secondary spraying absorption is discharged into the absorption tower 7 from a pipeline arranged at the top of the absorption tower 3; the liquid-gas flow ratio of the first spraying liquid to the gas phase obtained after primary absorption to the second spraying liquid to the gas phase obtained after primary absorption is 1: 250;
the second spraying liquid in the second lye tank 5 is fresh lye from an external environment, and the fresh lye is saturated lime water; mixing liquid phases obtained after secondary spraying absorption and then entering a first alkali liquor tank 4 as first spraying liquid, and when the concentration of VOCs in the first spraying liquid is increased to 5g/l, entering the first spraying liquid into a spraying liquid collecting tank 6 from a pipeline arranged at the bottom of the first alkali liquor tank 4;
(3) adsorption
Gas phase obtained after the secondary spraying absorption enters the absorption tower 7 from the bottom of the absorption tower 7 to be sequentially subjected to primary absorption, secondary absorption and tertiary absorption, and a first absorption plate, a second absorption plate and a third absorption plate are sequentially arranged in the absorption tower 7 from bottom to top;
the first adsorption plate comprises a first support plate which is adaptive to the cross section of the adsorption tower 7 and a first non-woven cloth bag which is arranged on the first support plate and is adaptive to the cross section of the adsorption tower 7, and activated carbon is filled in the first non-woven cloth bag;
the second adsorption plate comprises a second support plate adaptive to the cross section of the adsorption tower 7 and a second non-woven fabric bag which is arranged on the second support plate and adaptive to the cross section of the adsorption tower 7, and a mixture of activated carbon, calcium chloride powder, nano-grade polyaluminium chloride and polyacrylonitrile fiber is filled in the second non-woven fabric bag, wherein the mass ratio of the activated carbon to the calcium chloride powder to the nano-grade polyaluminium chloride to the polyacrylonitrile fiber is 100:6:12: 3;
the third adsorption plate comprises a third support plate adaptive to the cross section of the adsorption tower 7 and a third non-woven fabric bag which is arranged on the third support plate and adaptive to the cross section of the adsorption tower 7, and the third non-woven fabric bag is filled with a mixture of activated carbon, calcium chloride powder, nano-grade polyaluminium chloride, polyacrylonitrile fiber, polyvinyl alcohol, ceramic powder and wheat bran, wherein the mass ratio of the activated carbon, the calcium chloride powder, the nano-grade polyaluminium chloride, the polyacrylonitrile fiber, the polyvinyl alcohol, the ceramic powder and the wheat bran is 100:6:12:3:2:3: 3;
the gas phase obtained after the tertiary adsorption can be directly discharged into the air, and the first non-woven cloth bag, the second non-woven cloth bag and the third non-woven cloth bag obtained after adsorption are detached for reutilization treatment;
(4) reuse of
Conveying an absorption liquid collecting tank 2 and a spraying liquid collecting tank 6 to a recycling area, pumping primary absorption liquid in the absorption liquid collecting tank 2 into a treatment tank 8 from the bottom of the treatment tank 8, pumping second spraying liquid in the spraying liquid collecting tank 6 into the treatment tank 8 from the bottom of the treatment tank 8, adding acid liquid into the treatment tank 8 to adjust the pH value to 7.0, and enabling organic waste gas in the tank 8 to be treated to overflow and enter a combustion area 9 from a pipeline arranged at the top of the treatment tank 8;
putting the detached first non-woven cloth bag, second non-woven cloth bag and third non-woven cloth bag into a combustion zone 9, and adding zeolite powder and copper oxide nanoparticles into the combustion zone 9; the mass ratio of the total amount of the first non-woven cloth bag, the second non-woven cloth bag and the third non-woven cloth bag, the organic waste gas overflowing from the treatment tank 8, the zeolite powder and the copper oxide nano particles is 100:30:2: 0.5;
sufficient air is charged into the combustion zone 9 and combusted at 200 c, and the heat energy obtained from the combustion is reused by heat exchange.
Example 6: an organic waste gas treatment process, which is different from the process of example 5 in that a stainless steel corrugated packing is coated with an absorption layer, and the absorption layer is prepared by the following method: mixing styrene, methyl methacrylate, gelatin, starch and toluene according to the mass ratio of 100:35:0.6:0.4:3, heating to soften, stirring and reacting for 2.0hr to obtain the final product.
Example 7: an organic waste gas treatment process is different from that in the embodiment 6 in that a second non-woven fabric bag is also filled with sodium alginate and sodium diatomate, and the mass ratio of activated carbon, calcium chloride powder, nano-grade polyaluminum chloride, polyacrylonitrile fiber, sodium alginate to sodium diatomate is 100:6:12:3:2: 2;
the third non-woven fabric bag is also filled with sodium alginate, sodium diatomate and sodium bicarbonate, wherein the mass ratio of the activated carbon, calcium chloride powder, nano-grade polyaluminum chloride, polyacrylonitrile fiber, polyvinyl alcohol, ceramic powder, wheat bran, the sodium alginate, the sodium diatomate and the sodium bicarbonate is 100:6:12:3:2:3:3:2:2: 4.
Example 8: an organic waste gas treatment process is different from that of embodiment 7 in that the top of an adsorption tower 7 is connected with a reabsorption tank 10 through a pipeline, gas phase obtained after three-stage adsorption in the adsorption tower 7 enters the reabsorption tank 10 from an inlet on one side of the reabsorption tank 10, is adsorbed by a reabsorption plate vertically arranged in the reabsorption tank 10, and is discharged into the air from an outlet on one side, far away from the inlet, on the reabsorption tank 10;
the reabsorption plate comprises a reabsorption carrier plate which is adaptive to the longitudinal section of the reabsorption tank 10 and coatings coated on two sides of the reabsorption carrier plate, the thickness of the coatings is 5mm, and the coatings comprise 20wt% of magnesium oxide, 30wt% of aluminum oxide and 50wt% of magnesium chloride.
Performance characterization
1. Control group
Control group 1: the method for purifying and treating the organic waste gas is different from the method in the embodiment 1 in that only activated carbon is filled in a first non-woven fabric bag, a second non-woven fabric bag and a third non-woven fabric bag, and primary absorption is eliminated.
Control group 2: an exhaust gas treatment method, which refers to the embodiment of CN 107930313A.
2. Emission concentration test
At 21mg/m3Phthalate, 40mg/m3Dimethicone, 45mg/m3Benzene, 87mg/m3Toluene, 130mg/m3Xylene, 130mg/m3Phenols, 60mg/m3Formaldehyde, 160mg/m3Acetaldehyde, 32mg/m3Acrylonitrile, 31mg/m3Acrolein, 130mg/m3Methanol, 44mg/m3Anilines 80mg/m3Chlorobenzene, 35mg/m3Nitrobenzene and 100mg/m3Taking the mixed gas of chloroethylene as initial organic waste gas, respectively treating the mixed gas by different test groups, taking a test sample at the highest point of concentration outside the periphery, and carrying out concentration test by taking a TH-300B atmospheric environment volatile organic compound line monitoring system of an Agilent GC-FID/MS detection system as test equipment. The parallel test is carried out for 5 times, and the average value is taken. The test groups were examples 1-8 and control groups 1-2, respectively. The unorganized emission monitoring concentration limit in the integrated emission Standard of atmospheric pollutants (GB 16297-1996) is taken as the reference emission upper limit concentration.
The test results are shown in table 1. Table 1 shows:
(1) compared with the initial organic waste gas, the concentrations of phthalate, dimethyl silicone oil, benzene, toluene, xylene, phenols, formaldehyde, acetaldehyde, acrylonitrile, acrolein, methanol, anilines, chlorobenzenes, nitrobenzene and chloroethylene are greatly reduced after the treatment of the test group, which shows that the test group can better purify the organic waste gas;
(2) compared with a control group 1 and a control group 2, the concentrations of the phthalate, the simethicone, the benzene, the toluene, the xylene, the phenols, the formaldehyde, the acetaldehyde, the acrylonitrile, the acrolein, the methanol, the anilines, the chlorobenzenes, the nitrobenzenes and the chloroethylene treated in the embodiments 1 to 8 are further greatly reduced, which shows that the organic waste gas purification capacity can be greatly improved by adopting the scheme of the application;
(3) compared with the embodiment 1 (or the embodiment 5), the purification capacity of the organic waste gas treated by the embodiment 2 (or the embodiment 6) is further increased; compared with the embodiment 2 (or the embodiment 6), the purification capacity of the organic waste gas treated by the embodiment 3 (or the embodiment 7) is further increased; compared with the example 3 (or the example 7), the purification capacity of the organic waste gas treated by the example 4 (or the example 8) is further increased.
TABLE 1 emissionsConcentration measurement (unit: mg/m)3）
3. Test of Combustion Effect
And (3) testing the concentration of VOCs and CO at the outlet of the combustion zone after the treatment of the combustion zone in the test group is completed during the concentration test.
The test results are shown in table 2. Table 2 shows:
(1) compared with the control group 1, the phthalate, the dimethicone, the benzene, the toluene, the xylene, the phenols, the formaldehyde, the acetaldehyde, the acrylonitrile, the acrolein, the methanol, the anilines, the chlorobenzenes, the nitrobenzenes and the chloroethylene treated by the examples 1 to 8 have large combustion amount (which indicates high combustion utilization rate) and low CO concentration (which indicates large combustion conversion rate);
(2) compared with the example 1 (or the example 5), the combustion amount of the organic waste gas treated by the example 2 (or the example 6) is further increased, and the CO concentration is further reduced; compared with the example 2 (or the example 6), the combustion amount of the organic waste gas treated by the example 3 (or the example 7) is further increased, and the CO concentration is further reduced; the combustion amount of the organic exhaust gas treated in example 4 (or example 8) was further increased and the CO concentration was further decreased, as compared with example 3 (or example 7).
TABLE 2 test of combustion effect (unit: mg/m)3）
The above description should not be taken as limiting the invention to the specific embodiments, but rather, as will be readily apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which should be construed to fall within the scope of the invention as defined in the claims appended hereto.
Claims (2)
1. An organic waste gas treatment process is characterized by comprising the following steps:
(1) primary absorption
Organic waste gas enters the primary absorption tank (1) from the bottom of the primary absorption tank (1), gas phase obtained by absorption is discharged into the absorption tower (3) from a pipeline arranged at the top of the primary absorption tank (1), and stainless steel corrugated packing is arranged in the primary absorption tank (1); the primary absorption tank (1) is filled with primary absorption liquid, and the primary absorption liquid comprises 0.5-0.6 wt% of SDS, 0.1-0.2 wt% of polytetrafluoroethylene, 0.1-0.2 wt% of release paper scrap and 99.0-99.3% of saturated lime water; the liquid-gas flow ratio of the primary absorption liquid to the organic waste gas is 1: 700-800;
when the concentration of the organic waste gas in the primary absorption tank (1) is increased to 10g/l, the primary absorption liquid enters the absorption liquid collecting tank (2) from a pipeline arranged at the bottom of the primary absorption tank (1);
(2) absorption of lye
Gas phase obtained after primary absorption enters the absorption tower (3) from the bottom of the absorption tower (3) to be sequentially subjected to primary spray absorption and secondary spray absorption, and the middle part and the upper part of the absorption tower (3) are respectively sprayed with first spray liquid from a first alkali liquor tank (4) and second spray liquid from a second alkali liquor tank (5); gas phase obtained after the secondary spraying absorption is discharged into the absorption tower (7) from a pipeline arranged at the top of the absorption tower (3); the liquid-gas flow ratio of the first spraying liquid to the gas phase obtained after primary absorption to the second spraying liquid to the gas phase obtained after primary absorption is 1: 200-250;
the second spraying liquid in the second alkali liquor tank (5) is fresh alkali liquor from an external environment, and the fresh alkali liquor is saturated lime water; mixing liquid phases obtained after secondary spraying absorption and then entering a first alkali liquor tank (4) as first spraying liquid, and when the concentration of VOCs in the first spraying liquid is increased to 5g/l, entering the first spraying liquid into a spraying liquid collecting tank (6) from a pipeline arranged at the bottom of the first alkali liquor tank (4);
(3) adsorption
Gas phase obtained after the secondary spraying absorption enters the absorption tower (7) from the bottom of the absorption tower (7) to be sequentially subjected to primary absorption, secondary absorption and tertiary absorption, and a first absorption plate, a second absorption plate and a third absorption plate are sequentially arranged in the absorption tower (7) from bottom to top;
the first adsorption plate comprises a first support plate which is adaptive to the cross section of the adsorption tower (7) and a first non-woven cloth bag which is arranged on the first support plate and is adaptive to the cross section of the adsorption tower (7), and activated carbon is filled in the first non-woven cloth bag;
the second adsorption plate comprises a second support plate adaptive to the cross section of the adsorption tower (7) and a second non-woven fabric bag which is arranged on the second support plate and adaptive to the cross section of the adsorption tower (7), and a mixture of activated carbon, calcium chloride powder, nano-grade polyaluminium chloride and polyacrylonitrile fiber is filled in the second non-woven fabric bag, wherein the mass ratio of the activated carbon to the calcium chloride powder to the nano-grade polyaluminium chloride to the polyacrylonitrile fiber is 100: 5-6: 10-12: 2-3;
the third adsorption plate comprises a third support plate adaptive to the cross section of the adsorption tower (7) and a third non-woven fabric bag which is arranged on the third support plate and adaptive to the cross section of the adsorption tower (7), and a mixture of activated carbon, calcium chloride powder, nanoscale polyaluminium chloride, polyacrylonitrile fiber, polyvinyl alcohol, ceramic powder and wheat bran is filled in the third non-woven fabric bag, wherein the mass ratio of the activated carbon, the calcium chloride powder, the nanoscale polyaluminium chloride, the polyacrylonitrile fiber, the polyvinyl alcohol, the ceramic powder and the wheat bran is 100: 5-6: 10-12: 2-3: 1-2: 2-3;
the gas phase obtained after the tertiary adsorption can be directly discharged into the air, and the first non-woven cloth bag, the second non-woven cloth bag and the third non-woven cloth bag obtained after adsorption are detached for reutilization treatment;
(4) reuse of
Conveying an absorption liquid collecting tank (2) and a spraying liquid collecting tank (6) to a recycling area, pumping primary absorption liquid in the absorption liquid collecting tank (2) into a treatment tank (8) from the bottom of the treatment tank (8), pumping second spraying liquid in the spraying liquid collecting tank (6) into the treatment tank (8) from the bottom of the treatment tank (8), adding acid liquor into the treatment tank (8) to adjust the pH value to 6.8-7.0, and allowing organic waste gas in the tank (8) to be treated to overflow and enter a combustion area (9) from a pipeline arranged at the top of the treatment tank (8);
putting the first non-woven cloth bag, the second non-woven cloth bag and the third non-woven cloth bag which are detached into a combustion area (9), and adding zeolite powder and copper oxide nano particles into the combustion area (9); the mass ratio of the total amount of the first non-woven cloth bag, the second non-woven cloth bag and the third non-woven cloth bag, the organic waste gas overflowing from the treatment tank (8), the zeolite powder and the copper oxide nano particles is 100: 25-30: 1-2: 0.4-0.5;
sufficient air is filled into the combustion zone (9) and is combusted at the temperature of 200-225 ℃, and heat energy obtained by combustion is recycled through heat exchange;
the stainless steel corrugated packing is coated with an absorption layer, and the absorption layer is prepared by the following method: mixing styrene, methyl methacrylate, gelatin, starch and toluene according to the mass ratio of 100: 30-35: 0.5-0.6: 0.3-0.4: 2-3, heating to soften, and stirring for reaction for 1.5-2.0 hr to obtain the product;
the second non-woven fabric bag is further filled with sodium alginate and sodium diatomate, and the mass ratio of the activated carbon, the calcium chloride powder, the nano-grade polyaluminium chloride, the polyacrylonitrile fiber, the sodium alginate and the sodium diatomate is 100: 5-6: 10-12: 2-3: 1-2;
the third non-woven fabric bag is further filled with sodium alginate, sodium diatomate and sodium bicarbonate, wherein the mass ratio of the activated carbon, calcium chloride powder, nano-grade polyaluminum chloride, polyacrylonitrile fiber, polyvinyl alcohol, ceramic powder, wheat bran, the sodium alginate, the sodium diatomate and the sodium bicarbonate is 100: 5-6: 10-12: 2-3: 1-2: 2-3: 1-2: 3-4.
2. The organic waste gas treatment process according to claim 1, wherein the top of the adsorption tower (7) is connected with a reabsorption tank (10) through a pipeline, and a gas phase obtained after three-stage adsorption in the adsorption tower (7) enters the reabsorption tank (10) from an inlet on one side of the reabsorption tank (10), is adsorbed by a reabsorption plate vertically arranged in the reabsorption tank (10), and is then discharged into the air from an outlet on one side of the reabsorption tank (10) far away from the inlet;
the reabsorption plate comprises a reabsorption carrier plate which is matched with the longitudinal section of the reabsorption tank (10) and coatings coated on two sides of the reabsorption carrier plate, the thickness of the coatings is 4-5 mm, and the coatings comprise 20-22 wt% of magnesium oxide, 30-32 wt% of aluminum oxide and 46-50 wt% of magnesium chloride.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014175209A1 (en) * | 2013-04-25 | 2014-10-30 | 小松精練株式会社 | Gas purification device and gas purifying method |
| CN104475020A (en) * | 2014-11-20 | 2015-04-01 | 安徽天泰环保科技有限公司 | Environment-friendly active carbon particle with good absorption degradation effect and method for preparing environment-friendly active carbon particle with good absorption degradation effect |
| CN205659550U (en) * | 2016-06-02 | 2016-10-26 | 西安热工研究院有限公司 | System for high -efficient SOx/NOx control that unites |
| CN106178932A (en) * | 2016-06-30 | 2016-12-07 | 李其忠 | A kind of method of normal-temperature efficient catalytic degradation synthetic leather industry VOCs waste gas |
| JP2017074309A (en) * | 2015-10-16 | 2017-04-20 | 東洋紡株式会社 | Deodorization honeycomb filter |
| CN107661684A (en) * | 2017-07-20 | 2018-02-06 | 中石化宁波工程有限公司 | Volatile organic waste gas handling process |
| CN207384888U (en) * | 2017-10-23 | 2018-05-22 | 大韩道恩高分子材料(上海)有限公司 | A kind of VOCs exhaust treatment systems |
-
2018
- 2018-07-24 CN CN201810816479.4A patent/CN108905576B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014175209A1 (en) * | 2013-04-25 | 2014-10-30 | 小松精練株式会社 | Gas purification device and gas purifying method |
| CN104475020A (en) * | 2014-11-20 | 2015-04-01 | 安徽天泰环保科技有限公司 | Environment-friendly active carbon particle with good absorption degradation effect and method for preparing environment-friendly active carbon particle with good absorption degradation effect |
| JP2017074309A (en) * | 2015-10-16 | 2017-04-20 | 東洋紡株式会社 | Deodorization honeycomb filter |
| CN205659550U (en) * | 2016-06-02 | 2016-10-26 | 西安热工研究院有限公司 | System for high -efficient SOx/NOx control that unites |
| CN106178932A (en) * | 2016-06-30 | 2016-12-07 | 李其忠 | A kind of method of normal-temperature efficient catalytic degradation synthetic leather industry VOCs waste gas |
| CN107661684A (en) * | 2017-07-20 | 2018-02-06 | 中石化宁波工程有限公司 | Volatile organic waste gas handling process |
| CN207384888U (en) * | 2017-10-23 | 2018-05-22 | 大韩道恩高分子材料(上海)有限公司 | A kind of VOCs exhaust treatment systems |
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