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

A converter gas, dry dust removal technology, applied in lighting and heating equipment, process efficiency improvement, furnace and other directions, can solve problems such as waste of industrial water, high failure rate of electrostatic precipitators, inability to achieve dust removal effect, etc., to achieve dust removal effect Significantly reduce the effect of explosion hazards

Inactive Publication Date: 2011-01-12
北京国华新兴节能环保科技有限公司
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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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  • Process and equipment for dust collection and heat recovery by converter gas dry method
  • Process and equipment for dust collection and heat recovery by converter gas dry method

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Embodiment Construction

[0022] According to the attached figure 1 As a specific embodiment description, the converter gas enters the vaporization cooling flue (2) from the converter (1), and the temperature drops from about 1450°C to 800-1000°C. After entering the spark arrestor (3), the converter gas separates the sparking coarse particles that are easy to cause explosion in (3). Then it enters the waste heat boiler (4) and is cooled to about 200°C, and the steam collected by the waste heat boiler can be used for power generation or other purposes. The coarse dust collected from the spark arrestor (3) and the waste heat boiler (4) enters the coarse ash storage bin (6) through the coarse ash conveying device (5) at the lower part thereof. Afterwards, the converter gas enters the nitrogen pulse gas bag filter (9), and the fine dust is removed, and the dust accumulated on the cloth bag is blown off by the nitrogen pulse blowback, and the fine dust collected by the nitrogen pulse gas bag filter (9) pa...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/40F27D17/00
CPCY02P10/25
Inventor 韩泽生
Owner 北京国华新兴节能环保科技有限公司
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