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System for preparing hydrogen-rich coal gas and applying hydrogen-rich coal gas to blast furnace injection and working process

A pneumatic conveying system and gas technology, applied in blast furnaces, gasification processes, blast furnace details, etc., can solve the problem of high emissions, and achieve the effects of reducing coke consumption, good coal adaptability, and reducing heat loss

Pending Publication Date: 2021-06-22
河北燕钢科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a system for preparing hydrogen-rich gas and injecting it into a blast furnace, so as to solve the problem of CO in the current blast furnace ironmaking technology. 2 The problem of high emissions

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  • System for preparing hydrogen-rich coal gas and applying hydrogen-rich coal gas to blast furnace injection and working process
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  • System for preparing hydrogen-rich coal gas and applying hydrogen-rich coal gas to blast furnace injection and working process

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Embodiment Construction

[0035] It should be noted that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined. "Several" means one or more than one, unless otherwise clearly and specifically defined.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right" etc. are based on those shown in the accompanying drawings. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply...

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Abstract

The invention discloses a system for preparing hydrogen-rich coal gas and applying the hydrogen-rich coal gas to blast furnace injection and a working process. The system comprises a two-stage furnace, a gasifying agent injection system, a high-temperature material pneumatic conveying system, a coal gas injection system, a gas-solid separation device, a coal gas heat exchanger, a waste heat boiler, a dust removal device and a two-stage coal gas pressurizing machine. According to the system, hydrogen-rich coal gas preparation, coal gas injection system and blast furnace ironmaking coupling linkage operation are achieved, and the working processes of hot charging and hot conveying of high-temperature coke breeze and conveying of high-temperature coal gas into a furnace are realized; according to the preparation process, the high-calorific-value hydrogen-rich coal gas can be obtained, the coal type adaptability is good, the carbon conversion rate is high, and the coal energy utilization rate is effectively increased; in addition, the hydrogen-rich coal gas is safely injected into the blast furnace for reduction smelting, the proportion of H2 in the blast furnace reducing atmosphere is increased, the reduction reaction speed in the furnace can be increased, the direct reduction reaction of carbon is reduced, the coke consumption is reduced, and the smelting cost is reduced; and meanwhile, the carbon dioxide emission of the blast furnace is greatly reduced.

Description

technical field [0001] The invention relates to the technical fields of ironmaking and energy utilization, in particular to a system for preparing hydrogen-rich gas and injecting it into a blast furnace and a working process of the system. Background technique [0002] The current blast furnace ironmaking technology has been continuously improved and perfected for a long time, and has developed into a mature and advanced production process. However, there are still many problems in the blast furnace process, especially in the country's vigorously advocating low-carbon emission reduction and severe environmental protection situation, as CO 2 As a major emitter, the iron and steel industry will inevitably have enormous pressure. At the same time, the contradiction between the large consumption of blast furnace coke and its small storage capacity, as well as the energy structure of rich coal, little gas, and poor oil will inevitably bring crisis to the subsequent development o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00C21B7/00C10J3/50C10J3/66
CPCC10J3/50C10J3/66C10J2300/0953C10J2300/0959C10J2300/0976C21B5/003C21B7/00Y02P20/129
Inventor 刘卫东徐连友岳文超刘泽阳胡俊波
Owner 河北燕钢科技有限公司
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