Process and equipment for dust collection and heat recovery by converter gas dry method

Abstract

The invention provides an optimized process scheme and equipment aiming at the problems existing in the recovery technology of the conventional converter gas dry method. In the process scheme and the equipment, physical sensible heat between 800-1,000 DEG C and 200 DEG C of converter gas is recovered by using a high-efficient heat pipe exhaust-heat boiler, and hidden danger of system explosion is eliminated by using a spark arrestor at the same time. A nitrogen pulse bag-type dust collector replaces an electrostatic dust collector, so that the equipment has the advantages of simple structure, low fault rate and high dust collection efficiency. Compared with the recovery technology of the conventional converter gas dry method, the process scheme and equipment have obvious improvements on benefits, which are shown as reduction in dust emission load, reduction in energy and water consumption, increase in steam recovery, small equipment investment, safe and reliable process and the like.

Description

technical field [0001] The invention relates to the field of converter gas dry dedusting and heat recovery, in particular to a process and equipment for fully dry purification and heat recovery of converter gas. Background technique [0002] At present, in the field of iron and steel smelting, the recovery of converter gas is mainly divided into two types: dry recovery technology (LT method, Lurgi-Thyssen method) and wet method recovery technology (OG method). Compared with the OG recovery method, the LT method has obvious advantages, which are as follows: First, the dust removal and purification efficiency is high, and the dust concentration can be reduced to 10mg / Nm through the electrostatic precipitator 3 ; Second, the system adopts dry dust removal treatment, which consumes less water; third, the system resistance loss is small, the gas calorific value is high, and the recovered dust can be directly used. However, with the popularization and application of dry process t...

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Problems solved by technology

[0004] Purpose of the invention: the present invention proposes an improved method for the problems existing in the LT method imported from abroad and domestically digested, and mainly solves the two key problems described in the background technology. A large amount of industrial water; Second, the electrostatic precipitator has a high failure rate and cannot achieve the expected dust removal effect

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