CN118663063B - Asphalt flue gas treatment method - Google Patents
Asphalt flue gas treatment method Download PDFInfo
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- CN118663063B CN118663063B CN202410871725.1A CN202410871725A CN118663063B CN 118663063 B CN118663063 B CN 118663063B CN 202410871725 A CN202410871725 A CN 202410871725A CN 118663063 B CN118663063 B CN 118663063B
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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
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/04—Plant or installations having external electricity supply dry type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
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Abstract
本发明提供了一种沥青烟气的处理方法，属于烟气处理技术领域。本发明提供了一种沥青烟气的处理方法，包括以下步骤：将沥青烟气采用聚酯胎布进行吸附，得到前处理的沥青烟气；将所述前处理的沥青烟气依次进行静电捕集和光催化氧化，得到净化的烟气。本发明通过聚酯胎布吸附、静电捕集、光催化氧化技术的组合，首先，利用聚酯胎布吸附能够将几乎全部填料粉尘、绝大部分沥青烟吸附在聚酯胎布上，极大减轻了静电捕集和光催化氧化的负担，然后再通过静电捕集进一步除尘，最后采用光催化氧化分解小分子有机气体及异味物质，达到达标排放的目的，从而实现对沥青烟气的有效净化。
The present invention provides a method for treating asphalt flue gas, and belongs to the technical field of flue gas treatment. The present invention provides a method for treating asphalt flue gas, comprising the following steps: using polyester tire cloth to adsorb asphalt flue gas to obtain pre-treated asphalt flue gas; and sequentially subjecting the pre-treated asphalt flue gas to electrostatic capture and photocatalytic oxidation to obtain purified flue gas. The present invention combines the polyester tire cloth adsorption, electrostatic capture, and photocatalytic oxidation technologies. First, the polyester tire cloth adsorption can adsorb almost all filler dust and most of the asphalt smoke on the polyester tire cloth, which greatly reduces the burden of electrostatic capture and photocatalytic oxidation. Then, electrostatic capture is used to further remove dust. Finally, photocatalytic oxidation is used to decompose small molecular organic gases and odor substances to achieve the purpose of meeting emission standards, thereby achieving effective purification of asphalt flue gas.
Description
Technical Field
The invention belongs to the technical field of gas treatment, and particularly relates to a treatment method of asphalt flue gas.
Background
The polymer modified asphalt waterproof coiled material is the most main variety in waterproof materials, and is widely applied to building materials, but asphalt smoke generated in the production process is always a difficult problem of environmental protection and control of industries. The main components of asphalt fume comprise asphalt fume, inorganic filler dust, micromolecular peculiar smell substances and the like, and the asphalt fume consists of three phases of gas, liquid and solid, wherein the gas phase part is a mixture of different gases, the appearance state is mostly smoke with low concentration and extremely dispersed, the liquid phase part is extremely fine volatile condensate with the particle size of 0.1-1.0 mu m, and the solid phase dust particles mainly originate from the powder filler and the modifier, have larger particle size and are easy to be settled under the action of gravity. Asphalt fumes also have the characteristic of easy adhesion, and the asphalt vapor condensation point is high (200 ℃), so that the asphalt fumes are easy to adhere to equipment and pipeline walls to form liquid-to-solid asphalt in the collecting, conveying and processing processes, and the asphalt fumes are difficult to eliminate, so that pipeline blockage and equipment failure are caused. Besides common atmospheric pollutants such as CO, SO X、NOX and the like, the asphalt volatile contains 3, 4-benzopyrene, paraxylene, butylbenzene, pentylene, 2-methyl heptane, 2-methylthiophene, cyclohexanone, dimethyl trithio, dimethyl tetrasulfide, benzothiazole, 2, 4-trimethyl-1, 2-dihydroquinoline and other substances with high toxicity and strong pungent odor and even strong carcinogenic substances. The asphalt fume with complex components and gas, liquid and solid three-state pollutants is easy to adhere and block the treatment device when treated by the conventional method, and is difficult to completely purify.
At present, main methods for treating asphalt flue gas include a combustion method, an absorption method, an adsorption method, an electrostatic trapping method, a photocatalytic oxidation method and the like, wherein the process of combining polyester felt adsorption and activated carbon adsorption can effectively treat the flue gas, but the activated carbon adsorption becomes dangerous waste after saturation, and secondary pollution is caused. Therefore, how to effectively purify asphalt flue gas without causing secondary pollution becomes a technical problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a treatment method of asphalt flue gas. The treatment method provided by the invention can be used for effectively purifying the asphalt flue gas, and has no secondary pollution.
In order to achieve the above object, the present invention provides the following technical solutions:
The invention provides a treatment method of asphalt flue gas, which comprises the following steps:
(1) Adsorbing asphalt fume by adopting polyester felt to obtain pretreated asphalt fume;
(2) And (3) sequentially carrying out electrostatic trapping and photocatalytic oxidation on the pretreated asphalt flue gas obtained in the step (1) to obtain purified flue gas.
Preferably, the flow rate of the asphalt fume in the step (1) is 10000-20000 m 3/h.
Preferably, the model of the polyester tyre fabric in the step (1) comprises national standard type 1 or national standard type 2.
Preferably, the adsorption in step (1) is performed in an adsorption device comprising a housing;
an air outlet is formed in the top of the shell;
an air inlet is formed in the bottom of the shell;
the two sides of the shell are respectively provided with a feed inlet and a discharge outlet, and the feed inlet and the discharge outlet are provided with a sealing soft brush.
Preferably, the vertical distance between the air inlet and the air outlet is 100-600 cm.
Preferably, the heights of the feed inlet and the discharge outlet are independently 1-10 cm, and the widths of the feed inlet and the discharge outlet are independently 100-200 cm.
Preferably, the step (1) comprises the steps of inputting asphalt smoke into the shell through the air inlet, inputting polyester tyre cloth into the shell through the feed inlet, adsorbing the polyester tyre cloth with the cloth surface perpendicular to the flowing direction of the asphalt smoke, outputting the obtained pretreated asphalt smoke from the shell through the air outlet, and outputting the adsorbed polyester tyre cloth from the shell through the discharge outlet.
Preferably, the feeding speed of the polyester tire fabric is 30-40 m/min.
Preferably, the temperature of the electrostatic trapping in the step (2) is 10-100 ℃, and the secondary voltage of the electrostatic trapping is 30-80 kV.
Preferably, the light source in the photo-catalytic oxidizer used in the photo-catalytic oxidation in the step (2) is a mercury lamp, and the power of the light source is 10-300 w.
The invention provides a treatment method of asphalt fume, which comprises the following steps of adsorbing asphalt fume by using polyester tyre cloth to obtain pretreated asphalt fume, and sequentially carrying out electrostatic trapping and photocatalytic oxidation on the pretreated asphalt fume to obtain purified fume. The invention uses the combination of polyester tyre cloth adsorption, static trapping and photocatalysis oxidation technology, firstly, the polyester tyre cloth adsorption can be used for adsorbing almost all filler dust and most of asphalt smoke on the polyester tyre cloth, thus greatly reducing the burden of static trapping and photocatalysis oxidation, meanwhile, the adsorbed polyester tyre cloth can be used for preparing polymer modified asphalt waterproof coiled materials, avoiding secondary pollution, then the static trapping is used for further dedusting, and finally, the photocatalysis oxidation is adopted for decomposing small molecular organic gas and peculiar smell substances, thereby achieving the aim of reaching the emission standards and realizing the effective purification of asphalt smoke. The results of the examples show that the particulate matters in the asphalt fume are 207mg/m 3, the asphalt fume is 148mg/m 3, the total non-methane hydrocarbon is 62.1mg/m 3, the adsorption efficiency of the asphalt fume in the pretreated asphalt fume obtained by the adsorption of the polyester felt is 86.8%, the adsorption efficiency of the particulate matters is 99.6%, the particulate matters in the purified fume are 3.2mg/m 3, the asphalt fume is 12.1mg/m 3, the total non-methane hydrocarbon is 8.5mg/m 3, and the adsorbed polyester felt is used as the raw material of asphalt waterproof coiled materials.
Drawings
FIG. 1 is a schematic cross-sectional view of an adsorption apparatus according to an embodiment of the present invention;
In the figure, A is a feed inlet, B is a discharge outlet, I is an air inlet, II is an air outlet, 1 is a shell, 2 is a explosion arrester, 3 is a sealing soft brush, 4 is a static eliminator, and 5 is a rotating roll shaft;
FIG. 2 is a process flow diagram of the treatment method of asphalt fume of the present invention.
Detailed Description
The invention provides a treatment method of asphalt flue gas, which comprises the following steps:
(1) Adsorbing asphalt fume by adopting polyester felt to obtain pretreated asphalt fume;
(2) And (3) sequentially carrying out electrostatic trapping and photocatalytic oxidation on the pretreated asphalt flue gas obtained in the step (1) to obtain purified flue gas.
The treatment method provided by the invention is suitable for asphalt fume obtained by any method, including but not limited to asphalt oxidation, a tyre cloth oil immersion working section, a film covering working section and other emission collection. The composition of the asphalt fume is not particularly limited, and conventional components can be used.
The invention adsorbs asphalt fume by adopting polyester tyre cloth to obtain pretreated asphalt fume. The invention adopts the polyester base cloth to adsorb the asphalt fume, almost can adsorb all filler dust and most of asphalt fume on the polyester base cloth, greatly lightens the burden of post-treatment, and simultaneously can be used for preparing polymer modified asphalt waterproof coiled materials, so that pollutants are fixed in the waterproof coiled materials, and secondary pollution is avoided.
In the invention, the flow rate of the asphalt fume is preferably 10000-20000 m 3/h, and the type of the polyester tire fabric comprises national standard type 1 or national standard type 2. The treatment method provided by the invention adopts any polyester tyre cloth.
In the present invention, the adsorption is preferably performed in an adsorption apparatus.
In one embodiment of the invention, as shown in fig. 1, the adsorption device comprises a shell 1, wherein the cross section of the shell 1 is hexagonal. The invention is not particularly limited in the material and thickness of the housing, and the invention can be adjusted as required. According to the invention, the cross section of the shell is hexagonal, so that asphalt smoke can be conveniently diffused and adsorbed in the device, and the adsorption performance is further improved.
In one embodiment of the present invention, as shown in fig. 1, an air outlet II is provided at the top of the housing 1, an air inlet I is provided at the bottom of the housing 1, and the air inlet I and the air outlet II are located in the same vertical direction. The air inlet and the air outlet are arranged in the same vertical direction, so that the air conditioner can be conveniently installed, and the space is saved.
In one embodiment of the present invention, as shown in fig. 1, the width of the air inlet I is the same as the width of the air outlet II, and the vertical distance between the air inlet and the air outlet is preferably 100-600 cm. The vertical distance between the air inlet and the air outlet is set in the range, so that the process requirement can be met, and the space can be saved.
In one embodiment of the present invention, the air inlet I and the air outlet II are independently connected to the air duct. The invention has no requirement on the shape and the size of the air inlet and the air outlet, and the air inlet and the air outlet are matched with the air duct.
In one embodiment of the invention, as shown in fig. 1, the pipe connected to the air inlet I is provided with a detonation inhibitor 2. The invention can eliminate the potential safety hazard caused by high-temperature smoke by arranging the explosion arrester.
In one embodiment of the present invention, as shown in fig. 1, a feed inlet a and a discharge outlet B are respectively provided at two sides of the housing 1, the feed inlet a and the discharge outlet B are provided with a sealing soft brush 3, the feed inlet a and the discharge outlet B are located on the same horizontal plane, the feed inlet a and the discharge outlet B have the same height, the height of the feed inlet and the discharge outlet is preferably 1-10 cm independently, and the width of the feed inlet and the discharge outlet is preferably 100-200 cm independently. The height of the feed inlet and the height of the discharge outlet are arranged in the range, so that the requirements of feeding and discharging can be met, and the sealing requirement can be met to the greatest extent.
In one embodiment of the present invention, as shown in fig. 1, the inlet a and the outlet B are independently connected with a static eliminator 4. The type of the static eliminator is not particularly limited, and the static eliminator can be any type of static eliminator known to those skilled in the art. The present invention is not limited to the manner of connection described, and may be practiced by those skilled in the art. The invention is provided with the static eliminator, eliminates static generated by friction between the polyester tyre cloth and the sealing soft brush, thereby eliminating potential safety hazard caused by static.
In the present invention, the widths of the feed inlet, the discharge outlet, the sealing soft brush and the polyester felt are preferably the same. According to the invention, the feed inlet, the discharge outlet, the sealing soft brush and the polyester tire cloth are set to be the same in width, so that the tightness of the device can be further improved.
As shown in fig. 1, in one embodiment of the present invention, a rotating roller shaft 5 is further disposed on the inner wall of the housing 1, the rotating roller shaft 5 is perpendicular to the flow direction of the asphalt fume, and the rotating roller shaft 5 is parallel to the width direction of the feed inlet a. The material and the diameter of the rotating roll shaft are not particularly limited, and the rotating roll shaft can be selected according to common knowledge. The rotating roll shaft is a driven roll shaft, and no extra power is needed.
In one embodiment of the present invention, the number of the rotating roll shafts 5 is 4, and the rotating roll shafts are arranged in parallel and not in the same vertical direction. The vertical height of each rotating roll shaft is not particularly limited, and the vertical height of each rotating roll shaft can be adjusted according to the needs. The distance between the rotating roll shafts is not particularly limited, and the judgment can be carried out according to common knowledge. When the invention is provided with 4 rotating roll shafts, the middle two play a role in supporting, and the side two play a role in steering (a feed inlet and a discharge outlet).
In one embodiment of the present invention, as shown in fig. 1, the number of the rotating roll shafts 5 is 13, 2 rotating roll shafts in the roll shaft 5 are respectively arranged at the side of the feed port a and the side of the discharge port B, the remaining rotating roll shafts are arranged in three rows, the three rows are not in the same horizontal plane, and the number of the rotating roll shaft in the lowest row and the rotating roll shaft in the middle row in the three rows is 4. The distance between the rotating roll shafts is not particularly limited, and the judgment can be carried out according to common knowledge. According to the invention, the rotating roll shafts are arranged in three rows, so that asphalt smoke can be adsorbed for multiple times. The invention can adjust the adsorption times and trend of the polyester tyre cloth by arranging the arrangement mode and the data of the rotating roll shafts, and the number and the distribution of the rotating roll shafts are arranged according to the purification requirement on asphalt smoke.
The adsorption device provided by the invention can further improve the purifying effect of asphalt flue gas.
The invention discloses a polyester type asphalt smoke adsorption device, which is characterized in that asphalt smoke is preferably adsorbed by polyester type cloth, wherein the asphalt smoke is input into a shell through an air inlet, the polyester type cloth is input into the shell through a feed inlet, the cloth surface of the polyester type cloth is perpendicular to the flowing direction of the asphalt smoke, the asphalt smoke subjected to pretreatment is adsorbed, the obtained asphalt smoke is output from an air outlet to the shell, the adsorbed polyester type cloth is output from a discharge outlet to the shell, and the feeding speed of the polyester type cloth is preferably 30-40 m/min. The invention can further improve the purifying effect of asphalt fume by controlling the feeding speed of the polyester felt.
In the present invention, the width of the polyester felt is preferably the same as the width of the inlet.
After the pretreated asphalt flue gas is obtained, the pretreatment asphalt flue gas is subjected to electrostatic trapping and photocatalytic oxidation in sequence to obtain purified flue gas.
In the invention, the temperature of the static electricity trapping is preferably 10-100 ℃, more preferably 40-60 ℃, and the operating voltage of the static electricity trapping is preferably 30-80 kV, more preferably 50-60 kV. The time for the electrostatic trapping is not particularly limited, and may be performed by an operation well known to those skilled in the art.
In the present invention, the electrostatic precipitator used for the electrostatic precipitator is preferably a dry electrostatic precipitator or a wet electrostatic precipitator, and more preferably a wet electrostatic precipitator. The type of the electrostatic precipitator is not particularly limited, and the electrostatic precipitator can be any type of electrostatic precipitator known to those skilled in the art.
In one embodiment of the invention, the operating voltage of the electrostatic precipitator is preferably 60kV, the effective electric field area is preferably 5.8m 2, and the number of corona poles is preferably 166.
In the present invention, the electrostatic precipitator is preferably connected to the adsorption apparatus through a pipe.
In the invention, the light source in the photocatalytic oxidation device used for photocatalytic oxidation is preferably a mercury lamp, the power of the light source is preferably 10-300W, and the catalyst used for photocatalytic oxidation is preferably one of nano titanium dioxide and nano ferric oxide. The photocatalytic oxidizer is not particularly limited, and the photocatalytic oxidizer may be an apparatus known to those skilled in the art. The source of the catalyst is not particularly limited, and commercially available products known to those skilled in the art may be used. The invention has no requirement on specific technological parameters of the photocatalytic oxidation, and the photocatalytic oxidation is selected according to common sense.
In the invention, the photocatalytic oxidizer is preferably connected with the electrostatic catcher through a pipeline, and the photocatalytic oxidizer is preferably connected with the chimney through a pipeline and a fan.
In the invention, asphalt flue gas enters the shell from the air inlet, is adsorbed for one time or a plurality of times by the polyester tyre cloth, enters the static electricity trapping device through the fan, further enters the photocatalytic oxidation device after dust and asphalt flue gas are trapped and purified through static electricity, and is oxidized and decomposed into micromolecular peculiar smell substances, and the gas is discharged from a chimney at high altitude after reaching the standard; by adopting the integration of polyester felt adsorption, electrostatic trapping, further adsorption purification and photocatalytic oxidation degradation of peculiar smell substances, the dust particles and asphalt smoke in most of asphalt smoke are solidified in the finished coiled material, so that the low-cost and high-efficiency green treatment of the asphalt smoke in the production of the waterproof coiled material is realized, and no secondary pollution is caused; compared with the traditional absorption method and adsorption method, the asphalt fume adsorption technology can solidify pollutants in a waterproof coiled material product, and uses polyester tyre cloth adsorbed with the pollutants as raw materials of the asphalt waterproof coiled material, so that the transfer of the pollutants is avoided, no secondary pollution is caused, the asphalt fume adsorption technology is a green treatment technology, the treatment cost of the adsorption of the polyester tyre cloth is only 1/100-1/200 of that of a combustion method, flammable and explosive fuels such as natural gas are not needed, and the safety risk is greatly reduced.
The invention solves the difficult problem of asphalt flue gas pollution blocking treatment equipment and achieves the aim of low-cost standard emission through the integrated process of polyester tyre cloth adsorption and electrostatic trapping and photocatalysis oxidation technology coupling.
The invention takes the production base material as the asphalt smoke adsorption material, the pollutant asphalt smoke is solidified in the product, thereby avoiding secondary pollution and recycling the pollutant, and the adsorption frequency of the asphalt smoke is flexibly adjusted according to the requirement, so that the adsorption efficiency is high.
The process flow chart of the treatment method of asphalt fume of the invention is shown in figure 2. As can be seen from FIG. 2, the asphalt fume can be obtained from asphalt oxidation, a tyre cloth oil immersion working section, a film covering working section and other emission collection, and can be discharged at high altitude after polyester tyre cloth adsorption, electrostatic trapping and photocatalytic oxidation are carried out on the asphalt fume.
The technical solutions of the present invention will be clearly and completely described in the following in connection with the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The adsorption device of the present embodiment includes a housing 1;
the cross section of the shell 1 is hexagonal;
the shell is made of tinplate;
the top of the shell 1 is provided with an air outlet II, and the bottom of the shell 1 is provided with an air inlet I, wherein the air inlet I and the air outlet II are positioned in the same vertical direction;
The widths of the air inlet I and the air outlet II are the same;
the vertical distance between the air inlet and the air outlet is 300cm;
The air inlet I and the air outlet II are respectively connected with the air duct;
The pipeline connected with the air inlet I is provided with a detonation inhibitor 2;
the two sides of the shell 1 are respectively provided with a feed inlet A and a discharge outlet B, wherein the feed inlet A and the discharge outlet B are provided with a sealing soft brush 3;
The heights of the feed inlet A and the discharge outlet B are the same and are 10cm, and the widths of the feed inlet A and the discharge outlet B are 100cm;
the feed inlet A and the discharge outlet B are connected with a static eliminator 4;
the widths of the feed inlet, the discharge outlet and the sealing soft brush are the same;
The inner wall of the shell 1 is also provided with a rotary roll shaft 5, and the rotary roll shaft 5 is perpendicular to the flow direction of asphalt smoke, wherein the rotary roll shaft 5 is parallel to the width direction of the feed inlet A;
when the roll shafts are 4, the middle two roll shafts play a role in supporting, and the side two roll shafts (a feed inlet and a discharge outlet) play a role in steering;
the treatment method of the asphalt fume comprises the following steps:
(1) Asphalt smoke with the flow rate of 20000m 3/h (the particles in the asphalt smoke are 212mg/m 3, the asphalt smoke is 153mg/m 3, the total non-methane hydrocarbon is 65.7mg/m 3) is organically collected, then the asphalt smoke is input into the shell 1 from the air inlet I through the pressure regulating fan, the international 1-type polyester tire cloth is input into the shell 1 from the feed inlet A, the cloth cover of the polyester tire cloth is perpendicular to the flowing direction of the asphalt smoke and is adsorbed, the obtained pretreated asphalt smoke is output from the shell 1 from the air outlet II, the adsorbed polyester tire cloth is output from the shell 1 from the discharge outlet B and is used as the raw material of an asphalt waterproof coiled material, wherein the feeding speed of the polyester tire cloth is 30m/min, and the width of the polyester tire cloth is the same as that of the feed inlet;
(2) And (3) carrying out electrostatic trapping on the pretreated asphalt flue gas obtained in the step (1) in a wet electrostatic trap, and then, carrying out photocatalytic oxidation in a photocatalytic oxidation device to obtain purified flue gas, wherein the operation voltage of the wet electrostatic trap is 60kV, the effective electric field area is 5.8m 2, the corona pole number is 166, the catalyst in the photocatalytic oxidation device is TiO 2 (foam nickel is used as a carrier), and the high-pressure mercury lamp is 400W and 6.
The pre-treated asphalt fume obtained by the adsorption of the polyester felt in example 1 was measured, the adsorption efficiency of asphalt fume was 68.6%, the adsorption efficiency of particulate matter was 95.2%, and the purified fume was measured, the particulate matter in the fume was 8.6mg/m 3, the asphalt fume was 33.7mg/m 3, and the total non-methane hydrocarbon was 14.4mg/m 3.
Example 2
FIG. 1 is a schematic cross-sectional view of an adsorption apparatus according to an embodiment of the present invention;
In the figure, A is a feed inlet, B is a discharge outlet, I is an air inlet, II is an air outlet, 1 is a shell, 2 is a flame arrester, 3 is a sealing soft brush, 4 is a static eliminator, and 5 is a rotating roll shaft.
The adsorption device is different from the adsorption device in the embodiment 1 only in the number of the rotating roll shafts, wherein the number of the rotating roll shafts 5 is 13, 2 rotating roll shafts in the roll shaft 5 are respectively arranged on one side of a feed port A and one side of a discharge port B, and the rest rotating roll shafts are arranged in three rows, wherein the three rows are not in the same horizontal plane, and the number of the rotating roll shafts in the lowest row and the rotating roll shafts in the middle row in the three rows are respectively 4;
the treatment method of the asphalt fume comprises the following steps:
(1) Asphalt smoke with the flow rate of 20000m 3/h (the particles in the asphalt smoke are 207mg/m 3, the asphalt smoke is 148mg/m 3, the total non-methane hydrocarbon is 62.1mg/m 3) is organically collected, then the asphalt smoke is input into the shell 1 from the air inlet I through the pressure regulating fan, the international 1-type polyester tire cloth is input into the shell 1 from the feed inlet A, the cloth cover of the polyester tire cloth is perpendicular to the flowing direction of the asphalt smoke and is adsorbed, the obtained pretreated asphalt smoke is output from the shell 1 from the air outlet II, the adsorbed polyester tire cloth is output from the shell 1 from the discharge outlet B and is used as the raw material of an asphalt waterproof coiled material, wherein the feeding speed of the polyester tire cloth is 30m/min, and the width of the polyester tire cloth is the same as that of the feed inlet;
(2) And (3) carrying out electrostatic trapping on the pretreated asphalt flue gas obtained in the step (1) in a wet electrostatic trap, and then, carrying out photocatalytic oxidation in a photocatalytic oxidation device to obtain purified flue gas, wherein the operation voltage of the wet electrostatic trap is 60kV, the effective electric field area is 5.8m 2, the corona pole number is 166, the catalyst in the photocatalytic oxidation device is TiO 2 (foam nickel is used as a carrier), and the high-pressure mercury lamp is 400W and 6.
The pre-treated asphalt fume obtained by the adsorption of the polyester felt in example 2 was measured, the adsorption efficiency of the asphalt fume was 86.8%, the adsorption efficiency of the particulate matter was 97.6%, and the purified fume was measured, the particulate matter in the fume was 3.2mg/m 3, the asphalt fume was 12.1mg/m 3, and the total non-methane hydrocarbon was 8.5mg/m 3.
From the above embodiments, the treatment method provided by the invention can be used for carrying out low-cost and high-efficiency green treatment on asphalt flue gas, and has no secondary pollution.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (7)
1. A treatment method of asphalt flue gas comprises the following steps:
(1) Inputting asphalt smoke into a shell through an air inlet, and inputting polyester tyre fabrics into the shell through a feed inlet, wherein the fabric surfaces of the polyester tyre fabrics are perpendicular to the flowing direction of the asphalt smoke, adsorbing, outputting the obtained pretreated asphalt smoke from the shell through an air outlet, and outputting the adsorbed polyester tyre fabrics from a discharge outlet, wherein the feed rate of the polyester tyre fabrics is 30-40 m/min;
(2) Sequentially carrying out electrostatic trapping and photocatalytic oxidation on the pretreated asphalt flue gas obtained in the step (1) to obtain purified flue gas;
the adsorption in the step (1) is carried out in an adsorption device, wherein the adsorption device comprises a shell;
an air outlet is formed in the top of the shell;
an air inlet is formed in the bottom of the shell;
the two sides of the shell are respectively provided with a feed inlet and a discharge outlet, and the feed inlet and the discharge outlet are provided with a sealing soft brush.
2. The treatment method according to claim 1, wherein the flow rate of the asphalt fume in the step (1) is 10000-20000 m 3/h.
3. The process of claim 1, wherein the polyester tire fabric in step (1) is of the national standard type 1 or the national standard type 2.
4. The method according to claim 1, wherein the vertical distance between the air inlet and the air outlet is 100-600 cm.
5. The method according to claim 1, wherein the height of the inlet and outlet is independently 1 to 10cm and the width is independently 100 to 200cm.
6. The method according to claim 1, wherein the temperature of the electrostatic trapping in the step (2) is 10 to 100 ℃, and the secondary voltage of the electrostatic trapping is 30 to 80kv.
7. The method according to claim 1, wherein the light source in the photocatalytic oxidizer used in the photocatalytic oxidation in the step (2) is a mercury lamp, and the power of the light source is 10-300 w.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410871725.1A CN118663063B (en) | 2024-07-01 | 2024-07-01 | Asphalt flue gas treatment method |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1243023A (en) * | 1999-04-08 | 2000-02-02 | 肖元恺 | Purifying adsorption band and moving-bed purifying device using same |
| CN210356506U (en) * | 2019-06-17 | 2020-04-21 | 河南彩虹建材科技有限公司 | Waterproofing membrane production line tail end waste treatment device |
| CN219050782U (en) * | 2022-11-25 | 2023-05-23 | 渭南科顺新型材料有限公司 | Environment-friendly modified asphalt waterproofing membrane workshop fume treatment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3684471B2 (en) * | 1995-01-31 | 2005-08-17 | バブコック日立株式会社 | Bag filter material |
| CA2227716A1 (en) * | 1995-05-12 | 1996-11-14 | M.E. Wright | Filter device |
| JP2000189734A (en) * | 1998-12-25 | 2000-07-11 | Seiren Co Ltd | Durable filtering adsorption sheet and production thereof |
| JP2003182196A (en) * | 2001-12-21 | 2003-07-03 | Seiko Epson Corp | Ink ribbon tape |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243023A (en) * | 1999-04-08 | 2000-02-02 | 肖元恺 | Purifying adsorption band and moving-bed purifying device using same |
| CN210356506U (en) * | 2019-06-17 | 2020-04-21 | 河南彩虹建材科技有限公司 | Waterproofing membrane production line tail end waste treatment device |
| CN219050782U (en) * | 2022-11-25 | 2023-05-23 | 渭南科顺新型材料有限公司 | Environment-friendly modified asphalt waterproofing membrane workshop fume treatment device |
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