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Blast furnace coal gas dechlorinating agent, preparation method of dechlorinating agent and dechlorinating method thereof

A technology for blast furnace gas and dechlorination agent, which is applied in combustible gas purification, combustible gas purification/transformation, and selection of absorbing solid gas purification, etc. question

Inactive Publication Date: 2018-09-14
BEIJING PEKING UNIV PIONEER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a low-cost, high-performance blast furnace gas dechlorination agent, its preparation method, and dechlorination method, so as to solve the problems of complex preparation process, high price and unsuitable application in blast furnaces. Problems in the field of gas dechlorination

Method used

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  • Blast furnace coal gas dechlorinating agent, preparation method of dechlorinating agent and dechlorinating method thereof
  • Blast furnace coal gas dechlorinating agent, preparation method of dechlorinating agent and dechlorinating method thereof
  • Blast furnace coal gas dechlorinating agent, preparation method of dechlorinating agent and dechlorinating method thereof

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preparation example Construction

[0048] The invention provides a blast furnace gas dechlorination agent, a preparation method thereof and a dechlorination method, which have low cost and excellent performance and are suitable for the blast furnace gas dechlorination field.

[0049] The blast furnace gas dechlorination agent provided by the invention is a calcium-based dechlorination agent; calcium carbonate (CaCO 3 ) as an active component, knead calcium carbonate, a binder and a certain amount of water together, then extrude, keep healthy overnight in a natural environment, and then dry at a higher temperature; the blast furnace gas dechlorination The strength of the agent is above 80N / cm; the blast furnace gas dechlorination agent can be washed with water during use, and the strength of the blast furnace gas dechlorination agent after water washing is above 50N / cm. The drying at a higher temperature is specifically drying at a temperature of 120° C. for 3 to 12 hours; the binder uses clay minerals that will...

Embodiment 1

[0056]Add heavy calcium carbonate and diatomaceous earth binder to the kneader respectively, the mass fraction of calcium carbonate in the dechlorination agent is 30%, then add a certain amount of water, fully knead, the amount of water added depends on the water absorption of the raw materials, and then Extruded into a cylindrical shape, kept in a natural environment overnight, and dried at 120°C for 3 hours to make a finished dechlorination agent with a strength of 80.17N / cm.

[0057] The evaluation test method of dechlorination agent is as follows:

[0058] Because the gas consumption of the original particle size test is too large, it is impossible to detect the strength of the dechlorination agent after use. The lower end of the reactor that first contacts the gas source is filled with 20 grains of the original particle dechlorination agent with a length of about 5 mm (the finished product of the dechlorination agent prepared by the above method) ), and 5ml of 20-40 mesh ...

Embodiment 2

[0068] Add light calcium carbonate and attapulgite binder into the kneader respectively, the mass fraction of calcium carbonate in the dechlorination agent is 50%, then add a certain amount of water, fully knead, the amount of water added depends on the water absorption of the raw materials, and then Extruded into a clover shape, kept in a natural environment overnight, dried at 120°C for 5 hours, and made into a finished dechlorination agent with a strength of 261N / cm.

[0069] The evaluation test method of dechlorination agent is as follows:

[0070] Because the gas consumption of the original particle size test is too large, it is impossible to detect the strength of the dechlorination agent after use. Fill 20 grains of the original particle dechlorination agent with a length of about 5mm in the lower end of the reactor first contacting the gas source, and fill the top with 20-40 mesh granulation 5ml of dechlorination agent, which not only saves gas volume, but also obtains...

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Abstract

The invention discloses a blast furnace coal gas dechlorinating agent, a preparation method of the dechlorinating agent and a dechlorinating method thereof. The blast furnace coal gas dechlorinating agent has the active ingredients of calcium carbonate. The calcium carbonate, bonding agents and water are kneaded together; then strip extrusion is performed; the keeping in good health over the nightis performed in natural environment; then, the drying is performed at a higher temperature. The intensity is 80N / cm or more; after the single-time use, the water washing can be performed; then, multi-time dichlorination can be performed; after the water washing, the intensity is 50N / cm or more; the mass percentage of the active ingredient calcium carbonate in the dechlorinating agent is 28.2 to 90 percent; the active ingredient calcium carbonate can be heavy calcium carbonate with the granularity being 1250 to 1500 meshes, light calcium carbonate with the granularity being 1250 to 1500 meshes, calcium carbonate prepared by a nanometer stage coprecipitation method, and calcium carbonate prepared by a nanometer stage solid phase reaction method. During the dichlorination, 20 to 25 particlesof raw particle dechlorinating agents with the length being about 5mm are filled in the lower end of the contact air source; 3 to 5ml of granulation dechlorinating agents being 20 to 40 meshes are filled at the upper side. The preparation process is simple; the cost is low; the performance is excellent.

Description

technical field [0001] The invention relates to a preparation method of a dechlorination agent, in particular to a blast furnace gas dechlorination agent, a preparation method and a dechlorination method. Background technique [0002] With the continuous development of iron and steel enterprises, the smelting intensity of blast furnaces and the wide application of technologies to reduce the cost of smelting blast furnaces, such as blast furnace oxygen-enriched coal injection technology, sinter spraying of CaC1 2 Solution technology, etc., resulting in acid gas (such as SO 2 , SO 3 、H 2 S, HC1, etc.) content is getting higher and higher. However, the dry dedusting process cannot effectively remove acid gases such as hydrogen chloride (HCl) contained in blast furnace gas, resulting in almost all acid gases remaining in the gas. [0003] When the gas leaves the blast furnace, the temperature gradually decreases, and when it enters the bag filter, the temperature drops to ab...

Claims

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Application Information

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IPC IPC(8): C10K1/20C10K1/26C10K1/32
CPCC10K1/20C10K1/26C10K1/32
Inventor 梁曙光郭迎秋
Owner BEIJING PEKING UNIV PIONEER TECH
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