CN112691535A - Carbide slag-based sulfur dioxide curing agent and preparation method thereof - Google Patents
Carbide slag-based sulfur dioxide curing agent and preparation method thereof Download PDFInfo
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- CN112691535A CN112691535A CN202011483033.8A CN202011483033A CN112691535A CN 112691535 A CN112691535 A CN 112691535A CN 202011483033 A CN202011483033 A CN 202011483033A CN 112691535 A CN112691535 A CN 112691535A
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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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
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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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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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
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/78—Recycling of wood or furniture waste
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Abstract
The invention discloses a carbide slag-based sulfur dioxide curing agent and a preparation method thereof, wherein carbide slag is conveyed into a wet crusher to obtain mud-mass-shaped carbide slag with the particle size of 5-10mm, water is added into the mud-mass-shaped carbide slag according to the water-material ratio of 12:1-8:1 to prepare carbide slag slurry, the carbide slag slurry is pumped into a sand mill and is wet-milled at the rotating speed of 40-60RPS until the median particle size is 0.5-10 mu m, and 0.1-0.5% of a stabilizer is added to obtain the carbide slag sulfur dioxide curing agent. The sulfur dioxide curing agent provided by the invention takes solid waste as a raw material, the preparation process is environment-friendly and safe, the curing agent has high absorption efficiency, and sulfur dioxide can be rapidly captured and absorbed to generate stable CaSO4·2H2O。
Description
Technical Field
The invention belongs to the field of solid waste resource utilization, and particularly relates to a carbide slag-based sulfur dioxide curing agent and a preparation method thereof.
Background
The coal yield of China is always stable in the world, the power generation by the fire of coal combustion still occupies most of the energy supply of China in the expected time in the future, and in addition, a large number of cities in the north of China still use coal for heating. Coal is a non-renewable energy source and, in addition to producing large quantities of carbon dioxide, also large quantities of sulfur dioxide after combustion. This, along with the emission of sulfur dioxide into the atmosphere, causes serious pollution to the atmosphere environment. Sulfur dioxide can cause lung disease and acid rain. According to statistics, the emission amount of sulfur dioxide in 2010 in China is up to 2185.1 ten thousand tons, while thermal power generation is a main source of sulfur dioxide, and other industrial production can also cause the emission of sulfur dioxide. Therefore, China faces a severe form of sulfur dioxide treatment.
Flue gas desulfurization is an effective means for controlling sulfur dioxide emission, and the basic principle of the flue gas desulfurization is to use an alkaline substance as an adsorbent of sulfur dioxide, namely a sulfur dioxide curing agent. According to the classification of sulfur dioxide curing agents, the flue gas desulfurization technology can be divided into the following types: (1) calcium processes based on calcium carbonate (limestone); (2) magnesium oxide based magnesium processes; (3) sodium method based on sodium sulfate; (4) by NH3A basic ammonia process; (5) alkaline process based on organic bases. In addition, the first and second substrates are,there are also some methods in research and development, such as the seawater method, the double alkali method, the magnesium hydroxide and oxide method, the sodium hydroxide method, etc. Although the current methods of curing sulfur dioxide are very diverse, the current calcium process based on calcium carbonate accounts for over 90% of the total commercial use in view of economic feasibility and curing efficiency. Although the limestone flue gas desulfurization method is widely applied at present, with the implementation of pollutant emission standard of thermal power plants (GB13223-2016), ultra-clean emission of many thermal power plants cannot be realized, and the modification of a desulfurization system is urgent. The equipment desulfurization modification is upgraded with tens of thousands of modification costs, and the upgrading period reaches half a year, which causes great economic and environmental protection pressure for enterprises. Under the condition of not modifying equipment, the improvement of the quality of the sulfur dioxide curing agent or the addition of a synergist is the only way out. The main problems of the existing limestone desulfurization method are that the solubility of limestone is low and the alkalinity of slurry is not high enough, so that the curing efficiency is low; in addition, a small amount of sulfur trioxide is contained in a thermal power plant, and acid mist is generated at the moment of contact of the sulfur trioxide and the slurry, so that the inner wall of the reaction kettle is corroded.
CN111359421A discloses a desulfurization method of marble desulfurizer and a method for recycling by-products. The marble desulfurizer is prepared by precipitating into slurry through a sedimentation tank, pressing into a mud cake through a press filter, and grinding into sand powder through a grinding machine; mixing a marble desulfurizer with water, and dispersing by using a high-speed liquid dispersion machine to prepare absorption slurry with the solid content of 20-35%; in the absorption tower, the flue gas containing sulfur dioxide is contacted with absorbent slurry in a spraying way to carry out physical and chemical reactions, and finally, a byproduct CaSO of solidified sulfur dioxide is generated3And CaSO4·2H2And (4) O crystals. The invention uses the waste stone chips/slurry generated in the marble processing process as the production raw material of the sulfur dioxide curing agent, and uses solid waste as the raw material to treat waste gas, thereby greatly reducing the cost. However, the waste marble chips or slurry are still calcium carbonate-based substances, and the quality and curing efficiency of the sulfur dioxide curing agent are not improved.
Disclosure of Invention
In order to solve the problems, the invention provides a carbide slag-based sulfur dioxide curing agent and a preparation method thereof, which are prepared by the following steps:
1) conveying the carbide slag to a wet crusher to obtain mud-like carbide slag with the particle size of 5-10 mm;
2) adding water into the mud-mass-shaped carbide slag obtained in the step 1) to prepare a water-material ratio of 12:1-8:1, and uniformly stirring to obtain carbide slag slurry;
3) pumping the carbide slag slurry obtained in the step 2) into a sand mill, wet-milling at the rotating speed of 40-60RPS until the median particle size is 0.5-10 mu m, adding 0.1-0.5% of stabilizer, and continuing low-speed wet milling for 2-3min to obtain superfine carbide slag slurry;
4) sieving the superfine carbide slag slurry obtained in the step 3) by a 0.16mm screen to remove a very small number of large particles to obtain homogeneous superfine carbide slag slurry, and sealing and storing the slurry to obtain the carbide slag-based sulfur dioxide curing agent with the quality guarantee period of 12 months.
The stabilizer in the step 3) is one of sodium hexametaphosphate, sodium tripolyphosphate and water glass.
The wet grinding equipment in the step 3) has a closed function, namely, materials are isolated from the external atmospheric environment in the wet grinding process so as to prevent CO in the air2In the grinding process, Ca (OH) in carbide slag is mixed2Reaction to form CaCO3Consuming Ca2+Affecting the curing efficiency.
Wet grinding the carbide slag to a median particle size of 0.5-10 μm to reduce the particle size of the carbide slag, increase the specific surface area of the carbide slag, and promote Ca in the liquid phase environment of the carbide slag during grinding2+And (4) dissolving out. Ca (OH) in the carbide slag slurry2With SO2Reaction to produce CaSO3Formation of stable CaSO after oxidation4·2H2O, the curing agent has high absorption efficiency and can quickly capture and absorb sulfur dioxide.
Advantageous effects
(1) The mode of industrial discharge of the carbide slag is wet discharge, and the carbide slag is directly conveyed to a wet crusher, so that the drying treatment process is avoided, and the energy consumption of solid waste treatment is reduced.
(2) The solid waste is used as a raw material, the preparation process is environment-friendly and safe, and no dust and no pollution gas are discharged.
(3) The wet grinding process reduces the particle size of the carbide slag from 5-10mm to 0.5-10 μm, increases the specific surface area of the carbide slag, and simultaneously the liquid phase environment in the grinding process helps to promote Ca2+The dissolution and the curing efficiency are improved.
(4) Ca (OH) in the carbide slag slurry2With SO2Reaction to produce CaSO3Formation of stable CaSO after oxidation4·2H2O, the curing agent has high absorption efficiency and can quickly capture and absorb sulfur dioxide.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present invention.
Example 1
1) Conveying the carbide slag to a wet crusher to obtain mud-like carbide slag with the particle size of 5-10 mm;
2) adding water into the sludge-shaped carbide slag obtained in the step 1) to prepare a mixture with a water-to-material ratio of 12:1, and uniformly stirring to obtain carbide slag slurry;
3) pumping the carbide slag slurry obtained in the step 2) into a sand mill, carrying out wet milling at the rotating speed of 60RPS until the median particle size is 0.5 mu m, adding 0.5% of stabilizer, and carrying out continuous low-speed wet milling for 2min to obtain the ultrafine carbide slag slurry.
4) Sieving the superfine carbide slag slurry obtained in the step 3) by a 0.16mm screen to remove a very small number of large particles to obtain homogeneous superfine carbide slag slurry, and sealing and storing the slurry to obtain the carbide slag-based sulfur dioxide curing agent with the quality guarantee period of 12 months.
The stabilizer in the step 3) is sodium hexametaphosphate.
The wet grinding equipment in the step 3) has a closed function, namely materials in the wet grinding processIsolated from the external atmosphere to prevent CO in the air2In the grinding process, Ca (OH) in carbide slag is mixed2Reaction to form CaCO3Consuming Ca2+Affecting the curing efficiency.
The sulfur dioxide curing agent prepared by the method is applied to a desulfurization system of a certain coal-fired power plant to replace 50% limestone desulfurizer, the desulfurization efficiency of the desulfurization system is detected continuously for 3 days, and the sulfur fixation efficiency is increased to 96.4-98.4% from the original 92.2-93.6%.
Example 2
1) Conveying the carbide slag to a wet crusher to obtain mud-like carbide slag with the particle size of 5-10 mm;
2) adding water into the mud-mass-shaped carbide slag obtained in the step 1) to prepare a water-material ratio of 8:1, and uniformly stirring to obtain carbide slag slurry;
3) pumping the carbide slag slurry obtained in the step 2) into a sand mill, carrying out wet milling at the rotating speed of 40RPS until the median particle size is 10 mu m, adding 0.1% of stabilizer, and carrying out continuous low-speed wet milling for 3min to obtain the ultrafine carbide slag slurry.
4) Sieving the superfine carbide slag slurry obtained in the step 3) by a 0.16mm screen to remove a very small number of large particles to obtain homogeneous superfine carbide slag slurry, and sealing and storing the slurry to obtain the carbide slag-based sulfur dioxide curing agent with the quality guarantee period of 12 months.
The stabilizing agent in the step 3) is water glass.
The wet grinding equipment in the step 3) has a sealing function, namely, the materials are isolated from the external atmospheric environment in the wet grinding process. To prevent CO in the air2In the grinding process, Ca (OH) in carbide slag is mixed2Reaction to form CaCO3Consuming Ca2+Affecting the curing efficiency.
The sulfur dioxide curing agent prepared by the method is applied to a desulfurization system of a certain coal-fired power plant to replace 20% limestone desulfurizer, the desulfurization efficiency of the desulfurization system is detected continuously for 3 days, and the sulfur fixation efficiency is increased from 92.2-93.6% to 94.3-95.2%.
Example 3
1) Conveying the carbide slag to a wet crusher to obtain mud-like carbide slag with the particle size of 5-10 mm;
2) adding water into the mud-mass-shaped carbide slag obtained in the step 1) to prepare a water-material ratio of 9:1, and uniformly stirring to obtain carbide slag slurry;
3) pumping the carbide slag slurry obtained in the step 2) into a sand mill, carrying out wet milling at the rotating speed of 50RPS until the median particle size is 3 mu m, adding 0.2% of stabilizer, and carrying out continuous low-speed wet milling for 3min to obtain the ultrafine carbide slag slurry.
4) Sieving the superfine carbide slag slurry obtained in the step 3) by a 0.16mm screen to remove a very small number of large particles to obtain homogeneous superfine carbide slag slurry, and sealing and storing the slurry to obtain the carbide slag-based sulfur dioxide curing agent with the quality guarantee period of 12 months.
The stabilizer in the step 3) is sodium tripolyphosphate.
The wet grinding equipment in the step 3) has a sealing function, namely, the materials are isolated from the external atmospheric environment in the wet grinding process. To prevent CO in the air2In the grinding process, Ca (OH) in carbide slag is mixed2Reaction to form CaCO3Consuming Ca2+Affecting the curing efficiency.
The sulfur dioxide curing agent prepared by the method is applied to a desulfurization system of a certain coal-fired power plant to replace 20% limestone desulfurizer, the desulfurization efficiency of the desulfurization system is detected continuously for 3 days, and the sulfur fixation efficiency is increased from 92.2-93.6% to 95.5-96.1%.
Claims (3)
1. A preparation method of carbide slag-based sulfur dioxide curing agent is characterized by comprising the following steps: the preparation method comprises the following steps:
1) conveying the carbide slag to a wet crusher to obtain mud-like carbide slag with the particle size of 5-10 mm;
2) adding water into the sludge-shaped carbide slag obtained in the step 1) to prepare a mixture with a water-to-material ratio of 12:1-8:1, and uniformly stirring to obtain carbide slag slurry;
3) pumping the carbide slag slurry obtained in the step 2) into a sand mill, wet-milling at the rotating speed of 40-60RPS until the median particle size is 0.5-10 mu m, adding 0.1-0.5% of stabilizer, and continuing low-speed wet milling for 2-3min to obtain the ultrafine carbide slag slurry.
4) Sieving the superfine carbide slag slurry obtained in the step 3) by a 0.16mm screen to remove a very small number of large particles to obtain homogeneous superfine carbide slag slurry, and sealing and storing the slurry to obtain the carbide slag-based sulfur dioxide curing agent with the quality guarantee period of 12 months.
2. The preparation method of the carbide slag-based sulfur dioxide curing agent as claimed in claim 1, wherein the curing agent comprises the following components: the stabilizer in the step 3) is one of sodium hexametaphosphate, sodium tripolyphosphate and water glass.
3. The preparation method of the carbide slag-based sulfur dioxide curing agent as claimed in claim 1, wherein the curing agent comprises the following components: the wet grinding equipment in the step 3) has a closed function, namely, the materials in the wet grinding process are isolated from the external atmospheric environment.
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| CN202011483033.8A CN112691535A (en) | 2020-12-16 | 2020-12-16 | Carbide slag-based sulfur dioxide curing agent and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114632459A (en) * | 2022-02-23 | 2022-06-17 | 国能龙源环保有限公司 | Preparation device and preparation method of carbide slag as desulfurization reducing agent |
| CN115069362A (en) * | 2022-05-30 | 2022-09-20 | 湖北工业大学 | Carbon fixation and emission reduction method for steel plant wet-grinding steel slag and application |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318100A (en) * | 2008-07-21 | 2008-12-10 | 北京博奇电力科技有限公司 | Wet process of FGD with acetylene sludge as absorbing agent |
| CN101816890A (en) * | 2009-12-25 | 2010-09-01 | 浙江天蓝环保技术有限公司 | Carbide slag pretreatment process used in wet desulphurization |
| CN101905919A (en) * | 2009-12-25 | 2010-12-08 | 浙江天蓝环保技术有限公司 | Method for processing carbide slag sulfur-containing clear solution by utilizing electroplating zinc-containing wastewater in desulphurization system |
| CN102091525A (en) * | 2010-12-23 | 2011-06-15 | 浙江天蓝环保技术有限公司 | Device and process for preparing carbide slag desulfurization seriflux from recovered ferro-silicon |
-
2020
- 2020-12-16 CN CN202011483033.8A patent/CN112691535A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318100A (en) * | 2008-07-21 | 2008-12-10 | 北京博奇电力科技有限公司 | Wet process of FGD with acetylene sludge as absorbing agent |
| CN101816890A (en) * | 2009-12-25 | 2010-09-01 | 浙江天蓝环保技术有限公司 | Carbide slag pretreatment process used in wet desulphurization |
| CN101905919A (en) * | 2009-12-25 | 2010-12-08 | 浙江天蓝环保技术有限公司 | Method for processing carbide slag sulfur-containing clear solution by utilizing electroplating zinc-containing wastewater in desulphurization system |
| CN102091525A (en) * | 2010-12-23 | 2011-06-15 | 浙江天蓝环保技术有限公司 | Device and process for preparing carbide slag desulfurization seriflux from recovered ferro-silicon |
Non-Patent Citations (1)
| Title |
|---|
| 郑水林等主编: "《超细粉碎工程》", 30 September 2006, 中国建材工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114632459A (en) * | 2022-02-23 | 2022-06-17 | 国能龙源环保有限公司 | Preparation device and preparation method of carbide slag as desulfurization reducing agent |
| CN115069362A (en) * | 2022-05-30 | 2022-09-20 | 湖北工业大学 | Carbon fixation and emission reduction method for steel plant wet-grinding steel slag and application |
| CN115069362B (en) * | 2022-05-30 | 2023-11-21 | 湖北工业大学 | Method for carbon fixation and emission reduction of wet-milling steel slag in steel plant and application of method |
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