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CN-116969457-B - Active coke preparation method and device

CN116969457BCN 116969457 BCN116969457 BCN 116969457BCN-116969457-B

Abstract

The invention belongs to the technical field of active coke, and particularly relates to a preparation method and a device of active coke. The preparation method of the active coke comprises the following steps of (1) granulating pulverized coal and red mud to obtain solid particles, and (2) preparing the solid particles prepared in the step (1) into coke to obtain the active coke. The method not only utilizes the solid waste resources, but also reduces the preparation cost of the active coke, and the prepared active coke has the original capability of physically adsorbing hydrogen sulfide, has the capability of chemically adsorbing metal oxide, combines physical adsorption and chemical adsorption, and has higher adsorption capability.

Inventors

  • GUO JIE
  • ZHANG JUN
  • CHU LIANG
  • ZHOU JIE
  • LI YONG
  • JIA CHENGUANG
  • LI YANG
  • YANG CHENGLONG
  • ZHANG LIQIANG
  • CUI YI
  • JING QINGHE
  • LI DEJUN
  • ZHANG HONGQING
  • SUN YUANSHUAI

Assignees

  • 扎赉诺尔煤业有限责任公司
  • 西安热工研究院有限公司
  • 山东大学
  • 华能嘉祥发电有限公司

Dates

Publication Date
20260508
Application Date
20230803

Claims (8)

  1. 1. The preparation method of the active coke is characterized by comprising the following steps: (1) Granulating pulverized coal and red mud to obtain solid particles, wherein the pulverized coal is lignite; (2) And (3) preparing the solid particles prepared in the step (1) into active coke, wherein the solid particles react with water vapor in the coke preparing process.
  2. 2. The method for preparing activated coke according to claim 1, wherein in the step (1), the mass ratio of the pulverized coal to the red mud is 100 (1-20).
  3. 3. The method for preparing active coke according to claim 1, wherein in the step (2), the coke preparation is performed at a temperature of 700-900 ℃ for 2-8 hours.
  4. 4. The method for producing active coke according to claim 1, wherein in the step (2), the mass ratio of the water vapor to the solid particles is (2 to 6): 1.
  5. 5. The method for preparing active coke according to any one of claims 1 to 4, wherein the preparation device adopted by the preparation method comprises a coal dust bin, a red mud bin, a forming device and a coke making oven; the outlet of the pulverized coal storage bin and the outlet of the red mud storage bin are respectively connected with the inlet of the forming device; The forming device is used for granulating the pulverized coal and the red mud to obtain solid particles, and an outlet of the forming device is connected with an inlet of the coke oven; The coke oven is used for making coke by solid particles and water vapor.
  6. 6. The method for producing active coke according to claim 5, wherein the coke oven comprises an inner layer for producing coke from solid particles and water vapor and an outer layer for introducing flue gas to provide heat for producing coke.
  7. 7. The method for producing active coke according to claim 6, wherein the apparatus further comprises a hydrogen sulfide removal chamber, a combustion chamber, and a steam generator; The gas outlet of the hydrogen sulfide removal chamber is connected with the gas inlet of the combustion chamber, so that the pyrolysis gas subjected to the hydrogen sulfide removal treatment enters the combustion chamber to be combusted to obtain flue gas; The gas outlet of the combustion chamber is respectively connected with the outer layer inlet of the coke making furnace and the heat source inlet of the steam generator, so that part of flue gas enters the outer layer of the coke making furnace to provide heat for coke making, and the other part of flue gas enters the steam generator to prepare steam; The steam outlet of the steam generator is connected with the inner layer steam inlet of the coke making furnace, so that steam enters the coke making furnace to carry out coke making reaction with solid particles.
  8. 8. The method for producing active coke according to claim 7, wherein the apparatus further comprises a cooling chamber connected to an active coke outlet of the coke oven for cooling active coke, and a cooling water outlet of the cooling chamber is connected to a water inlet of the steam generator.

Description

Active coke preparation method and device Technical Field The invention belongs to the technical field of active coke, and particularly relates to a preparation method and a device of active coke. Background Most of active coke used in the industry at present is prepared from coal as a raw material, and sulfur element contained in the coal can generate sulfur-containing gas such as hydrogen sulfide and the like to be mixed in coke oven gas in the carbonization and activation processes. Hydrogen sulfide is corrosive, can adversely affect the transportation of coke oven gas, can threaten the life and health of people, and can produce gas pollutants such as sulfur dioxide and the like after being burnt, thereby damaging the ecological environment. As the demand for aluminum products continues to increase worldwide, the production and storage amount of red mud are continuously increased as industrial solid waste discharged when extracting Al 2O3 in aluminum production industry. The red mud generally has strong alkalinity, and the pH value of the extract is more than 10, so that the red mud is easy to cause pollution of water areas such as underground water, rivers, lakes and the like or cause alkalization of land and cause land pollution under the condition of large accumulation. The particles of the red mud are very small, and dust can be raised to cause air pollution when the red mud is piled up in the open air. Disclosure of Invention The present invention has been made based on the findings and knowledge of the inventors regarding the following facts and problems: the active coke is used as an adsorption material which is cheap and easy to prepare and can be recycled, is widely applied to the aspects of pollutant treatment, air purification, water treatment and the like, but the fresh active coke has poor hydrogen sulfide adsorption and catalytic oxidation capability, and needs to be subjected to alkali modification and metal oxide modification. In the existing active coke preparation process, the activity Jiao Gaixing is mainly realized by heating nitrate at high temperature to modify metal oxide, the production cost is high, and meanwhile, nitrogen oxides can be generated in the process of heating and decomposing to pollute the environment. The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides a preparation method of active coke, which not only utilizes solid waste resources, but also reduces the preparation cost of the active coke, and the prepared active coke not only has the original capability of physically adsorbing hydrogen sulfide, but also has the chemical adsorption capability of metal oxide, and combines physical adsorption and chemical adsorption, so that the active coke has higher adsorption capability. The preparation method of the active coke comprises the following steps: (1) Granulating pulverized coal and red mud to obtain solid particles; (2) And (3) preparing the solid particles prepared in the step (1) into coke to obtain active coke. The method provided by the embodiment of the invention has the advantages and technical effects that 1, industrial solid waste red mud is used as a source of metal oxide in the modification of the active coke, solid waste resources are utilized, meanwhile, the cost of modified active coke is reduced, 2, the method provided by the embodiment of the invention is beneficial to active coke forming by adding red mud in the preparation process of the active coke, and the particle strength of the active coke is enhanced, 3, the method provided by the embodiment of the invention is beneficial to active coke forming, and the prepared active coke has the original capability of physically adsorbing hydrogen sulfide, the capability of chemically adsorbing hydrogen sulfide of metal oxide, and the physical adsorption and the chemical adsorption are combined, so that the prepared active coke has higher adsorption capability. In some embodiments, in the step (1), the mass ratio of the pulverized coal to the red mud is 100 (1-20). In some embodiments, in the step (1), the pulverized coal comprises at least one of anthracite, bituminous coal, and lignite. In some embodiments, in the step (2), the coking is performed at a temperature of 700-900 ℃ for 2-8 hours. In some embodiments, in step (2), the solid particles are reacted with steam during the coking process. In some embodiments, in the step (2), the mass ratio of the water vapor to the solid particles is (2-6): 1. The embodiment of the invention also provides a device for preparing the active coke, which comprises a coal dust bin, a red mud bin, a forming device and a coke making furnace; the outlet of the pulverized coal storage bin and the outlet of the red mud storage bin are respectively connected with the inlet of the forming device; The forming device is used for granulating the pulverized coal and the red