Converter flue gas pure dry purification and waste heat deep recovery system and method

A technology of converter flue gas and recovery system, which is applied in the field of steelmaking to achieve the effects of reducing consumption, production safety and increasing recycling

Pending Publication Date: 2019-01-15
WISDRI ENG & RES INC LTD
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Problems solved by technology

[0005] Aiming at the above-mentioned problems existing in the existing converter flue gas treatment process, the present invention provides a co

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  • Converter flue gas pure dry purification and waste heat deep recovery system and method

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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, 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.

[0031] In describing the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than in...

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Abstract

The invention provides a converter flue gas pure dry purification and waste heat deep recovery system. The system comprises a gasifying-cooling flue, a water/steam cooling cyclone separator, a waste heat recycling device, a ceramic fiber filter, a fan and a three-way switching valve which are connected in sequence through a pipeline, wherein the other two ends of the three-way switching valve areconnected with a coal gas recycling pipeline and a flue gas difusing pipeline respectively; a flue gas component analyzer is arranged between the fan and the three-way switching valve. By adopting thesystem, converter flue gas can be subjected to dust removal under a whole-dry condition, so that the consumption of water and vapor is lowered; meanwhile, waste heat in a low-medium-temperature segment of the converter flue gas is recycled on a large scale, so that the recycling amount of the waste heat resource is improved, and a remarkable energy saving effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a system and method for pure dry purification of converter flue gas and deep waste heat recovery. Background technique [0002] Converter steelmaking is currently the most important steelmaking method, accounting for more than 85% in China. The process is a complex high-temperature oxidation reaction dominated by carbon and oxygen reactions, which will produce a large amount of high-temperature dust-containing flue gas; The main components are CO (accounting for about 66%), CO 2 (approximately 16%) and N 2 (about 17%), and a small amount of O 2 and Ar. Because converter flue gas contains a large amount of CO, converter flue gas is also called converter gas. The initial temperature of converter gas is about 1600°C, which contains a large amount of dust from steelmaking, and the dust content is about 80-150g / m 3 , the main components of dust are FeO, Fe, CaO, Mn...

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Application Information

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IPC IPC(8): C21C5/40
CPCC21C5/40Y02P10/25
Inventor 徐海伦刘攀叶理德
Owner WISDRI ENG & RES INC LTD
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