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Production method for capturing and recovering CO2 from blast furnace gas for converter steelmaking

A blast furnace gas and blast furnace technology, which is applied in the field of gas recovery and utilization and iron and steel smelting to achieve the effects of high production efficiency, improved quality and calorific value, and large processing capacity

Pending Publication Date: 2021-08-10
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Using coal-fired power generation and lime calcination kiln tail gas as gas source to capture and recover CO 2 There are research and application reports on the technology, and the chemical absorption method is used to capture and recover CO using blast furnace gas as raw material gas. 2 And the application of converter steelmaking has not yet been reported

Method used

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  • Production method for capturing and recovering CO2 from blast furnace gas for converter steelmaking
  • Production method for capturing and recovering CO2 from blast furnace gas for converter steelmaking
  • Production method for capturing and recovering CO2 from blast furnace gas for converter steelmaking

Examples

Experimental program
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Effect test

Embodiment 1

[0061] (1) Raw gas dust removal

[0062] The raw material used in this example is a blast furnace gas, and the pressure is about 15 kPa, and the component is shown in Table 2.

[0063] Table 2

[0064]

[0065] From the shot of the blast furnace gas, the branch pipe gas is divided, and the flow rate is 600 nm. 3 / min (divided into the CO 2 The product requirements are adjusted), and the water washing dust is transferred to the heat exchanger to adjust the temperature to about 30 to 40 ° C, and the inlet of the absorption tower is sent.

[0066] (2) CO 2 Capture

[0067] The raw blast furnace gas entry from the bottom end of the absorption tower, and the absorption tacrollamine adsorbent (MDEA (23 wt%) + DEA (35 wt%), that is, in the alkylamine adsorbent solution, the concentration of MDEA is 23% by weight, DEA The concentration is 35 wt%; the temperature is about 30 to 35 ° C) CO 2 Adsorption reaction, alkylamine melt and blast furnace gas molar ratio is 1: 1.2. Adsorbed CO2 al...

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Abstract

The invention provides a method for recovering carbon dioxide from blast furnace gas. The method comprises the following steps: (1) introducing blast furnace gas output from a blast furnace into an absorption tower; (2) in the absorption tower, absorbing carbon dioxide in the blast furnace gas by adopting an alcohol amine adsorbent to obtain a rich solution; (3) feeding the rich solution into a regeneration tower, desorbing and releasing carbon dioxide from the rich solution, performing dehydrating and pressurizing, and then performing collecting. The method provided by the invention is a low-cost and high-efficiency CO2 capture recovery and application integrated technology, and is suitable for steel production combined enterprises, CO2 gas captured and recovered from blast furnace gas can replace Ar to be used for stainless steel and carbon steel smelting, and partial recycling of CO2, energy conservation and emission reduction are realized.

Description

Technical field [0001] The present invention relates to a gas recycling iron and steel smelting technology and, particularly, to a blast furnace gas recovery capturing CO 2 Production method for the use of converter steelmaking. Background technique [0002] According to the latest statistics, China's steel industry in carbon emissions, and electricity generation, the third largest after manufacturing building materials, accounting for about 15%. Therefore, optimize production and manufacturing process, reduce CO 2 Emission, development of CO 2 New ways and means of using the actual initiatives to implement national green development concept is one of the topics at the forefront of research workers in the steel industry. [0003] With coal-fired power generation, lime calcined kiln exhaust gas is a gas source trap recovery CO 2 Techniques have research and application report, with high furnace gas as a chemical absorption method to collect CO 2 It has not been found in the replac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D53/1493B01D53/1425B01D53/1418B01D2252/20478Y02A50/20Y02C20/40
Inventor 刘卫东李建民刘华平陈景锋
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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