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Converter flue gas carbon dioxide recovery system and process

A carbon dioxide and converter flue gas technology, applied in the field of iron and steel metallurgy production, can solve problems such as difficulty in carbon dioxide capture, and achieve the effects of reducing the risk factor, improving the safety factor, and avoiding bulky volumes

Pending Publication Date: 2022-03-18
WISDRI ENG & RES INC LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since some air is mixed in the converter gas recovery process and air is used for combustion in the combustion process, the CO in the final flue gas of converter gas combustion 2 by a large number of N 2 Dilution makes capture of carbon dioxide very difficult

Method used

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  • Converter flue gas carbon dioxide recovery system and process

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Embodiment Construction

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. In the drawings, the size and relative size of certain parts may be exaggerated for clarity.

[0026] In the description of the present invention, unless otherwise clearly stipulated and limited, the terms "connected" and "connected" should be interpreted in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical The connection can also be an electrical connection; it can be a ...

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Abstract

The invention relates to the field of ferrous metallurgy production, in particular to a converter flue gas carbon dioxide recovery system and process. The carbon dioxide recovery system comprises a first waste heat recovery device, a purification device, a chemical looping combustion device, a second waste heat recovery device and a carbon dioxide storage tank which are sequentially connected through pipelines, and an evaporation cooling flue used for cooling is connected between the first waste heat recovery device and a flue gas outlet of the converter. A furnace mouth smoke hood is further arranged between the smoke outlet of the converter and the evaporative cooling flue, a draught fan is further arranged on the pipeline between the second waste heat recovery device and the carbon dioxide storage tank, and a gas sealing protection device is arranged at the smoke outlet of the converter, so that air suction can be restrained, and low-nitrogen or nitrogen-free smoke is obtained. The converter flue gas is cooled for multiple times before entering the chemical looping combustion device, and the flue gas waste heat is recycled, so that the high requirement on the combustion device caused by overhigh flue gas temperature can be avoided, and meanwhile, the potential safety hazard of oxidation-reduction reaction at high temperature is avoided.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgical production, in particular to a converter flue gas carbon dioxide recovery system and process. Background technique [0002] On the one hand, carbon dioxide is one of the most important gases that cause the greenhouse effect. On the other hand, it has high civil and industrial value and is widely used in many fields. It is a very precious resource. It is not only widely used in Petroleum exploration, welding, low-temperature refrigerant, machinery manufacturing, artificial rainfall, fire protection, chemical industry, papermaking, agriculture, food industry, medical and health, etc., can also be used in supercritical solvents, laser technology, nuclear industry and other cutting-edge high-tech fields. [0003] The world's iron and steel industry carbon dioxide emissions account for 5% -6% of the global total emissions, while my country's iron and steel industry accounts for about 15% of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/40C01B32/50
CPCC21C5/40C01B32/50C21C2100/02C21C2100/06C01P2006/80Y02P10/25Y02P10/122Y02P20/10Y02P20/129
Inventor 刘攀
Owner WISDRI ENG & RES INC LTD
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