A flue gas treatment process for realizing ultra-low emission of industrial silicon flue gas

Abstract

The application discloses a flue gas treatment process for realizing ultra-low emission of industrial silicon flue gas, and belongs to the flue gas treatment field, which comprises dust removal, desulfurization and denitrification, the desulfurization comprises lower layer wet desulfurization and upper layer dry desulfurization; the lower layer wet desulfurization comprises the following steps: a flow uniformizing plate is arranged at the position of the flue gas inlet near the bottom of a desulfurization tower, a spraying device is arranged above the flow uniformizing plate, alkaline aqueous solution is sprayed downward through the spraying device, the flue gas in the desulfurization tower flows downward and the alkaline aqueous solution flows upward to be mixed in countercurrent, and the lower layer wet desulfurization is carried out; the upper layer dry desulfurization comprises the following steps: a porous carrier is arranged in the desulfurization tower above the spraying device, desulfurizer particles with water-repellent modified surfaces are uniformly filled in the porous carrier, the porous carrier is located above the spraying device, and the flue gas in the desulfurization tower flows downward and passes through the porous carrier after the lower layer wet desulfurization to carry out the upper layer dry desulfurization. The application has high desulfurization efficiency.

Description

Technical Field

[0001] This invention belongs to the field of flue gas treatment and relates to a flue gas treatment process for achieving ultra-low emissions of industrial silicon flue gas. Background Technology

[0002] Currently, the desulfurization processes used in industrial silicon flue gas treatment mainly include wet desulfurization and dry desulfurization. The desulfurization effect of dry desulfurizing agents will be severely reduced after they absorb water and become wet. Therefore, it is difficult to mix the two in actual use. To achieve good desulfurization effect by using a single wet or dry desulfurization method, multiple dry or wet desulfurization structures need to be set up in the desulfurization tower, which occupies a lot of space and makes the disassembly, assembly, and maintenance of the equipment very difficult.

[0003] In summary, there is currently a lack of a desulfurization process that combines wet and dry desulfurization in flue gas treatment. Summary of the Invention

[0004] The purpose of this invention is to provide a flue gas treatment process for achieving ultra-low emissions of industrial silicon flue gas, which solves the problem that there is currently a lack of a desulfurization process that combines wet and dry desulfurization in flue gas treatment.

[0005] The technical solution adopted in this invention is as follows:

[0006] A flue gas treatment process for achieving ultra-low emissions of industrial silicon flue gas includes dust removal, desulfurization, and denitrification, wherein the desulfurization includes lower-layer wet desulfurization and upper-layer dry desulfurization;

[0007] The lower-level wet desulfurization includes the following steps: a flow equalization plate is installed inside the desulfurization tower near the bottom flue gas inlet, and a spraying device is installed above the flow equalization plate. An alkaline aqueous solution is sprayed downward through the spraying device. The flue gas flowing upward inside the desulfurization tower is mixed countercurrently with the alkaline aqueous solution flowing downward to carry out the lower-level wet desulfurization.

[0008] The upper dry desulfurization includes the following steps: a porous carrier is installed inside the desulfurization tower above the spray device. The porous carrier is uniformly filled with desulfurizing agent particles with waterproof surface modification. The porous carrier is located above the spray device. The flue gas inside the desulfurization tower from bottom to top passes through the lower wet desulfurization and then through the porous carrier for upper dry desulfurization.

[0009] This invention modifies the desulfurizing agent particles used in dry desulfurization to make them waterproof, so that water mist in the flue gas after wet desulfurization cannot affect the desulfurizing agent in dry desulfurization. This achieves the combined use of wet and dry desulfurization, which has a better desulfurization effect than existing single wet or dry desulfurization methods. Furthermore, after the desulfurizing agent in dry desulfurization is modified to be waterproof, the waterproof layer formed on the surface of the desulfurizing agent particles has good air permeability and does not affect the contact between the desulfurizing agent and sulfur dioxide gas.

[0010] Furthermore, the waterproof modified desulfurizing agent particles are prepared by the following method:

[0011] S1. Ethyl acrylate (N-methylperfluorohexylsulfonamide), butyl acrylate, methyl methacrylate, and n-dodecyl mercaptan are added to hydrofluoroether and mixed evenly. The mixture is then heated to 70°C with stirring. Diisopropyl peroxide is added at 70°C. The mixture is stirred and reacted at 70°C for 12 hours. After standing for 5 hours, the mixture is washed and dried to obtain the first intermediate.

[0012] S2. After melting and blending the first intermediate, the biodegradable polymer, and the photodegradable polymer, di-tert-butyl peroxide and sodium bicarbonate are added at 80°C. After stirring for 2 hours, the reaction system is cooled to 60°C. Cerium stearate is added at 60°C, and the mixture is stirred for 20-25 minutes to obtain the second intermediate.

[0013] S3. Preparation of desulfurizing agent granules: Mix and stir mesoporous silica, activated carbon, alumina and calcium carbonate to obtain a desulfurizing agent mixture. Then, slowly pour the desulfurizing agent mixture into the organosilicon pressure-sensitive adhesive solution under stirring. After stirring continuously for 20 minutes at 50℃ and 700 rpm, granulate and dry to obtain desulfurizing agent granules.

[0014] S4. Add the desulfurizing agent granules, rice husk powder, and silane coupling agent to the second intermediate in sequence. After reacting for 2 hours at a stirring speed of 800 rpm, filter and dry to obtain waterproof modified desulfurizing agent granules.

[0015] After undergoing the aforementioned waterproof modification, the desulfurization particles produced by the dry desulfurization process of this invention form a highly breathable waterproof layer on their surface. To rapidly remove this waterproof layer during desorption, this invention incorporates biodegradable polymers, photodegradable polymers, and rice husk powder. Under certain conditions, such as light exposure and the presence of microorganisms, the waterproof layer on the surface of the desulfurization particles can be quickly detached.

[0016] Furthermore, the porous carrier is a microsphere silica gel carrier.

[0017] Furthermore, the biodegradable polymer comprises polylactic acid, carboxymethyl cellulose, and PBAT in a mass ratio of 1:1:1;

[0018] The photodegradable polymer is at least one of ethylene-carbon monoxide copolymer, ketene-ethylene copolymer, propylene, vinyl chloride, styrene and vinyl ketone copolymer.

[0019] Further, the mass ratio of ethyl acrylate (N-methylperfluorohexylsulfonamide), butyl acrylate, and methyl methacrylate is 2:1:1; the amount of n-dodecyl mercaptan added is 1% of the total mass of ethyl acrylate (N-methylperfluorohexylsulfonamide), butyl acrylate, and methyl methacrylate; and the amount of diisopropyl peroxide dicarbonate added is 2% of the total mass of ethyl acrylate (N-methylperfluorohexylsulfonamide), butyl acrylate, and methyl methacrylate.

[0020] The mass ratio of the first intermediate, the biodegradable polymer, and the photodegradable polymer is 2:1.5:1. The amount of di-tert-butyl peroxide added is 1.5% of the total mass of the first intermediate, the biodegradable polymer, and the photodegradable polymer. The amount of sodium bicarbonate added is 0.6% of the total mass of the first intermediate, the biodegradable polymer, and the photodegradable polymer. The amount of cerium stearate added is 1.6% of the mass of the photodegradable polymer.

[0021] The mass ratio of the mesoporous silica, activated carbon, alumina, and calcium carbonate is 3:2:1:3;

[0022] The amount of rice husk powder added is 3% of the total mass of the first intermediate, biodegradable polymer, and photodegradable polymer;

[0023] The amount of silane coupling agent added is 0.8% of the mass of the desulfurizer particles.

[0024] Furthermore, the silane coupling agent is γ-glycidoxypropyltrimethoxysilane.

[0025] Furthermore, the silicone pressure-sensitive adhesive is a methylsiloxane type silicone pressure-sensitive adhesive.

[0026] Furthermore, the alkaline aqueous solution is ammonia or sodium hydroxide solution.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] 1. A flue gas treatment process for achieving ultra-low emissions of industrial silicon flue gas involves waterproofing the desulfurizing agent particles used in dry desulfurization, so that the water mist in the flue gas after wet desulfurization cannot affect the desulfurizing agent in dry desulfurization, thereby realizing the combined use of wet and dry desulfurization, which has a better desulfurization effect than existing single wet or dry desulfurization.

[0029] 2. After the desulfurizing agent of dry desulfurization is modified to be waterproof, the waterproof layer formed on the surface of the desulfurizing agent particles has good air permeability and does not affect the contact between the desulfurizing agent and sulfur dioxide gas.

[0030] 3. In order to quickly remove the waterproof layer on the surface of desulfurization particles during desorption, this invention incorporates biodegradable polymers, photodegradable polymers, and rice husk powder. Under certain conditions such as light and microorganisms, the waterproof layer on the surface of desulfurization particles can be quickly removed. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort, wherein:

[0032] Figure 1 This is an SEM image of the dry desulfurizing agent particles after the waterproofing treatment of this invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0035] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0037] Example 1

[0038] The preferred embodiment of the present invention provides a flue gas treatment process for achieving ultra-low emissions of industrial silicon flue gas, including dust removal, desulfurization, and denitrification, wherein the desulfurization includes lower layer wet desulfurization and upper layer dry desulfurization;

[0039] The lower-level wet desulfurization includes the following steps: a flow equalization plate is installed inside the desulfurization tower near the bottom flue gas inlet, and a spraying device is installed above the flow equalization plate. An alkaline aqueous solution is sprayed downward through the spraying device. The flue gas flowing upward inside the desulfurization tower is mixed countercurrently with the alkaline aqueous solution flowing downward to carry out the lower-level wet desulfurization.

[0040] The upper dry desulfurization includes the following steps: a porous carrier is installed inside the desulfurization tower above the spray device. The porous carrier is uniformly filled with desulfurizing agent particles with waterproof surface modification. The porous carrier is located above the spray device. The flue gas inside the desulfurization tower from bottom to top passes through the lower wet desulfurization and then through the porous carrier for upper dry desulfurization.

[0041] The waterproof modified desulfurizing agent granules are prepared by the following method:

[0042] S1. Ethyl acrylate (N-methylperfluorohexylsulfonamide), butyl acrylate, methyl methacrylate, and n-dodecyl mercaptan are added to hydrofluoroether and mixed evenly. The mixture is then heated to 70°C with stirring. Diisopropyl peroxide is added at 70°C. The mixture is stirred and reacted at 70°C for 12 hours. After standing for 5 hours, the mixture is washed and dried to obtain the first intermediate.

[0043] S2. After melting and blending the first intermediate, the biodegradable polymer, and the photodegradable polymer, di-tert-butyl peroxide and sodium bicarbonate are added at 80°C. After stirring for 2 hours, the reaction system is cooled to 60°C. Cerium stearate is added at 60°C, and the mixture is stirred for 20-25 minutes to obtain the second intermediate.

[0044] S3. Preparation of desulfurizing agent granules: Mix and stir mesoporous silica, activated carbon, alumina and calcium carbonate to obtain a desulfurizing agent mixture. Then, slowly pour the desulfurizing agent mixture into the organosilicon pressure-sensitive adhesive solution under stirring. After stirring continuously for 20 minutes at 50℃ and 700 rpm, granulate and dry to obtain desulfurizing agent granules.

[0045] S4. Add the desulfurizing agent granules, rice husk powder, and silane coupling agent to the second intermediate in sequence. After reacting for 2 hours at a stirring speed of 800 rpm, filter and dry to obtain waterproof modified desulfurizing agent granules.

[0046] The porous carrier is a microsphere silica gel carrier.

[0047] The biodegradable polymer comprises polylactic acid, carboxymethyl cellulose, and PBAT in a mass ratio of 1:1:1.

[0048] The photodegradable polymer is an ethylene-carbon monoxide copolymer.

[0049] The mass ratio of N-methylperfluorohexylsulfonamide acrylate, butyl acrylate, and methyl methacrylate is 2:1:1; the amount of n-dodecyl mercaptan added is 1% of the total mass of N-methylperfluorohexylsulfonamide acrylate, butyl acrylate, and methyl methacrylate; and the amount of diisopropyl peroxide dicarbonate added is 2% of the total mass of N-methylperfluorohexylsulfonamide acrylate, butyl acrylate, and methyl methacrylate.

[0050] The mass ratio of the first intermediate, the biodegradable polymer, and the photodegradable polymer is 2:1.5:1. The amount of di-tert-butyl peroxide added is 1.5% of the total mass of the first intermediate, the biodegradable polymer, and the photodegradable polymer. The amount of sodium bicarbonate added is 0.6% of the total mass of the first intermediate, the biodegradable polymer, and the photodegradable polymer. The amount of cerium stearate added is 1.6% of the mass of the photodegradable polymer.

[0051] The mass ratio of the mesoporous silica, activated carbon, alumina, and calcium carbonate is 3:2:1:3;

[0052] The amount of rice husk powder added is 3% of the total mass of the first intermediate, biodegradable polymer, and photodegradable polymer;

[0053] The amount of silane coupling agent added is 0.8% of the mass of the desulfurizer particles.

[0054] The silane coupling agent is γ-glycidoxypropyltrimethoxysilane.

[0055] The silicone pressure-sensitive adhesive is a methylsiloxane type silicone pressure-sensitive adhesive.

[0056] The alkaline aqueous solution is ammonia.

[0057] The SEM image of the desulfurizer particles after waterproofing treatment in this embodiment is shown below. Figure 1 As shown, there is a clear stratification between the inside and outside.

[0058] Example 2

[0059] This embodiment differs from Embodiment 1 in that the photodegradable polymer is a ketene-ethylene copolymer.

[0060] Example 3

[0061] This embodiment differs from Embodiment 1 in that the photodegradable polymer is a copolymer of propylene, vinyl chloride, styrene, and vinyl ketone.

[0062] Example 4

[0063] This embodiment differs from Embodiment 1 in that the photodegradable polymer includes a copolymer of ethylene-carbon monoxide, ketene-ethylene, propylene, vinyl chloride, styrene, and vinyl ketone, with a mass ratio of 1:1:1.

[0064] Example 5

[0065] This embodiment differs from Embodiment 1 in that the alkaline aqueous solution is a sodium hydroxide solution.

[0066] Comparative Example 1

[0067] In this comparative example, only wet desulfurization is used. Wet desulfurization includes the following steps: a flow equalization plate is installed inside the desulfurization tower near the bottom flue gas inlet. A spray device is installed above the flow equalization plate. An alkaline aqueous solution is sprayed downward through the spray device. The flue gas flowing upward inside the desulfurization tower mixes countercurrently with the alkaline aqueous solution flowing downward, thus performing wet desulfurization. The alkaline aqueous solution is ammonia.

[0068] Comparative Example 2

[0069] In this comparative example, only dry desulfurization is used. The desulfurizing agent particles in the dry desulfurization are not waterproofed. The desulfurizing agent particles are a mixture of mesoporous silica, activated carbon, alumina, and calcium carbonate.

[0070] Comparative Example 3

[0071] Based on Example 1, the desulfurizing agent particles used in the dry desulfurization process in this comparative example are not modified to be waterproof; the mixture of mesoporous silica, activated carbon, alumina, and calcium carbonate is simply placed on a carrier.

[0072] Comparative Example 4

[0073] Based on Example 1, this comparative dry desulfurizing agent granules do not contain biodegradable polymers during waterproofing modification.

[0074] Comparative Example 5

[0075] Based on Example 1, this comparative dry desulfurizing agent granules do not contain photodegradable polymers during waterproofing modification.

[0076] Comparative Example 6

[0077] Based on Example 1, this comparative dry desulfurizing agent granules do not contain cerium stearate during waterproofing modification.

[0078] Comparative Example 7

[0079] Based on Example 1, this comparative dry desulfurizing agent granules do not contain sodium bicarbonate during waterproofing modification.

[0080] Comparative Example 8

[0081] Based on Example 1, the dry desulfurizing agent particles of this comparative example do not contain silicone pressure-sensitive adhesive during waterproof modification.

[0082] Experimental Example 1

[0083] The desulfurization efficiency of Examples 1-5 and Comparative Examples 1-8 was measured, and the results are shown in Table 1.

[0084] The formula for calculating desulfurization efficiency is: Desulfurization efficiency (m) = (SO2 mass concentration in flue gas before desulfurization tower × flue gas flow rate before desulfurization tower - SO2 mass concentration in flue gas after desulfurization tower × flue gas flow rate after desulfurization tower) / (SO2 mass concentration in flue gas before desulfurization tower × flue gas flow rate before desulfurization tower) × 100%.

[0085] The method for detecting the desulfurization efficiency of flue gas is based on the calculation formula mentioned above and is existing technology, so it will not be elaborated further here.

[0086] Table 1. Desulfurization efficiency test results

[0087]

[0088] The desulfurization efficiency of this invention is far higher than that of single dry desulfurization and wet desulfurization.

[0089] Experimental Example 2

[0090] The air permeability and water resistance of the 0.4 mm films formed by the second intermediates in Examples 1-5 and Comparative Examples 4-7 were measured, and the results are shown in Table 2. Sulfur dioxide was used as the test gas when testing the air permeability of the films.

[0091] The gas permeability is calculated as: G = V / A * t * P, where G represents the permeability, V represents the gas volume, A represents the area permeated through the membrane, t represents the thickness of the permeated material, and P represents the gas pressure at a given temperature, expressed as the volume value at standard temperature and pressure, in cm. 3 / (m 2 (24h, 0.1MPa). The method for detecting gas permeability is existing technology and will not be elaborated on here.

[0092] Water resistance: The water vapor transmission rate was measured using existing technology, and the unit is 1 g / m². 2 .day.1atm.

[0093] Table 2 Results of breathability and water resistance tests

[0094] breathability Waterproof Example 1 Greater than 50 Less than 1 Example 2 Greater than 50 Less than 1 Example 3 Greater than 50 Less than 1 Example 4 Greater than 50 Less than 1 Example 5 Greater than 50 Less than 1 Comparative Example 4 Less than 50 Greater than 1 Comparative Example 5 Less than 50 Greater than 1 Comparative Example 6 Greater than 50 Less than 1 Comparative Example 7 Less than 50 Less than 1

[0095] The waterproof layer that coats the dry desulfurization particles in this invention has high air permeability and good waterproof performance.

[0096] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A flue gas treatment process for achieving ultra-low emissions of industrial silicon flue gas, comprising dust removal, desulfurization, and denitrification, characterized in that: The desulfurization includes lower-layer wet desulfurization and upper-layer dry desulfurization; The lower-level wet desulfurization includes the following steps: a flow equalization plate is installed inside the desulfurization tower near the bottom flue gas inlet, and a spraying device is installed above the flow equalization plate. An alkaline aqueous solution is sprayed downward through the spraying device. The flue gas flowing upward inside the desulfurization tower is mixed countercurrently with the alkaline aqueous solution flowing downward to carry out the lower-level wet desulfurization. The upper dry desulfurization includes the following steps: a porous carrier is installed inside the desulfurization tower above the spray device. The porous carrier is uniformly filled with desulfurizing agent particles with waterproof surface modification. The porous carrier is located above the spray device. The flue gas inside the desulfurization tower from bottom to top passes through the lower wet desulfurization and then passes through the porous carrier for upper dry desulfurization. The waterproof modified desulfurizing agent granules are prepared by the following method: S1. Ethyl acrylate (N-methylperfluorohexylsulfonamide), butyl acrylate, methyl methacrylate, and n-dodecyl mercaptan are added to hydrofluoroether and mixed evenly. The mixture is then heated to 70°C with stirring. Diisopropyl peroxide is added at 70°C. The mixture is stirred and reacted at 70°C for 12 hours. After standing for 5 hours, the mixture is washed and dried to obtain the first intermediate. S2. After melting and blending the first intermediate, the biodegradable polymer, and the photodegradable polymer, di-tert-butyl peroxide and sodium bicarbonate are added at 80°C. After stirring for 2 hours, the reaction system is cooled to 60°C. Cerium stearate is added at 60°C, and the mixture is stirred for 20-25 minutes to obtain the second intermediate. S3. Preparation of desulfurizing agent granules: Mix and stir mesoporous silica, activated carbon, alumina and calcium carbonate to obtain a desulfurizing agent mixture. Then, slowly pour the desulfurizing agent mixture into the organosilicon pressure-sensitive adhesive solution under stirring. After stirring continuously for 20 minutes at 50℃ and 700 rpm, granulate and dry to obtain desulfurizing agent granules. S4. Add the desulfurizing agent granules, rice husk powder, and silane coupling agent to the second intermediate in sequence. After reacting for 2 hours at a stirring speed of 800 rpm, filter and dry to obtain waterproof modified desulfurizing agent granules.

2. The flue gas treatment process for achieving ultra-low emissions of industrial silicon fumes according to claim 1, characterized in that: The porous carrier is a microsphere silica gel carrier.

3. The flue gas treatment process for achieving ultra-low emissions of industrial silicon fumes according to claim 1, characterized in that: The biodegradable polymer comprises polylactic acid, carboxymethyl cellulose, and PBAT in a mass ratio of 1:1:

1. The photodegradable polymer is at least one of ethylene-carbon monoxide copolymer, ketene-ethylene copolymer, propylene, vinyl chloride, styrene and vinyl ketone copolymer.

4. The flue gas treatment process for achieving ultra-low emissions of industrial silicon fumes according to claim 3, characterized in that: The mass ratio of N-methylperfluorohexylsulfonamide acrylate, butyl acrylate, and methyl methacrylate is 2:1:1; the amount of n-dodecyl mercaptan added is 1% of the total mass of N-methylperfluorohexylsulfonamide acrylate, butyl acrylate, and methyl methacrylate; and the amount of diisopropyl peroxide dicarbonate added is 2% of the total mass of N-methylperfluorohexylsulfonamide acrylate, butyl acrylate, and methyl methacrylate. The mass ratio of the first intermediate, the biodegradable polymer, and the photodegradable polymer is 2:1.5:

1. The amount of di-tert-butyl peroxide added is 1.5% of the total mass of the first intermediate, the biodegradable polymer, and the photodegradable polymer; the amount of sodium bicarbonate added is 0.6% of the total mass of the first intermediate, the biodegradable polymer, and the photodegradable polymer; and the amount of cerium stearate added is 1.6% of the mass of the photodegradable polymer. The mass ratio of the mesoporous silica, activated carbon, alumina, and calcium carbonate is 3:2:1:3; The amount of rice husk powder added is 3% of the total mass of the first intermediate, biodegradable polymer, and photodegradable polymer; The amount of silane coupling agent added is 0.8% of the mass of the desulfurizer particles.

5. The flue gas treatment process for achieving ultra-low emissions of industrial silicon fumes according to claim 4, characterized in that: The silane coupling agent is γ-glycidoxypropyltrimethoxysilane.

6. The flue gas treatment process for achieving ultra-low emissions of industrial silicon fumes according to claim 1, characterized in that: The silicone pressure-sensitive adhesive is a methylsiloxane type silicone pressure-sensitive adhesive.

7. The flue gas treatment process for achieving ultra-low emissions of industrial silicon fumes according to claim 1, characterized in that: The alkaline aqueous solution is ammonia or sodium hydroxide solution.

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