Environment-friendly quicklime dust recovery device and working method

Abstract

The invention discloses an environment-friendly quick lime dust recovery device and a method thereof. The device includes a digester and a first feeder connected with a feed inlet of the digester; an input end of the first feeder is provided with a quick lime bin; the interior of the digester is provided with a flowmeter in a cut-through manner; the top of the digester is provided with a dust collecting cover; the dust collecting cover is connected with an input end of a second feeder; the top of the second feeder is provided with a dust settling chamber; the dust settling chamber communicates with a chimney; the dust collecting cover is vertically arranged on the top of the digester, and an output end of the second feeder is vertical to the dust settling chamber; the chimney is vertical to the dust settling chamber; the longitudinal section of the dust settling chamber has a trapezoid structure. The environment-friendly quick lime dust recovery device and the method thereof have the beneficial effects that with use of a chimney effect, the purifying and dust-removing effects are enhanced; all inflection points of internal channels of the whole system are of right-angle structures, and thus quick lime dust adhesion due to inclination of the internal channels is avoided; and by arrangement of the dust settling chamber, the purifying and dust-removing effects are enhanced.

Description

technical field [0001] The invention relates to the technical field of environmental protection and sintering production in the iron and steel industry, in particular to an environment-friendly quicklime dust recovery device and method. Background technique [0002] At present, quicklime digestion is one of the effective measures for iron and steel enterprises to produce high-yield, low-consumption and cost-reducing sintering products. However, a large amount of high-temperature and high-humidity dust will be generated during the digestion of quicklime with water, and a large amount of steam will come out of the digester with quicklime dust. , pervades the top of the factory building, seriously corroding the steel structure factory building and spare parts; after the digestion reaction between the floating quicklime dust and the water droplets in the steam, it is scattered on the surface of the equipment, which deteriorates the site environment; negative impact on health. ...

AI Technical Summary

Problems solved by technology

[0002] At present, quicklime digestion is one of the effective measures for iron and steel enterprises to produce high-yield, low-consumption and cost-reducing sintering products. However, a large amount of high-temperature and high-humidity dust will be generated during the digestion of quicklime with water, and a large amount of steam will come out of the digester with quicklime dust. , pervades the top of the factory building, seriously corroding the steel structure factory building and spare parts; after the digestion reaction between the floating quicklime dust and the water droplets in the steam, it is scattered on the surface of the equipment, which deteriorates the site environment; negative impact on health

[0003] In the process of technological progress in the steel industry, various high-temperature and high-humidity quicklime dust disposal technologies and equipment have emerged, but they are all due to failure to effectively deal with environmental protection issues such as dust settlement and steam discharge; some complex operations Equipment, the exhaust duct is seriously blocked, difficult to clean, and the service life is very short

As a result, many iron and steel enterprises have stopped using the quicklime digester for environmental protection, preferring to lose the output and quality of sinter

[0004] The cancellation of the quicklime digester shifted the quicklime digestion process to the post of mixing and adding water, and the generation of high-temperature and high-humidity quicklime dust has not been substantially reduced; the post of mixing and adding water is usually arranged in the open air, which apparently has little impact on the environment of the production site. However, due to the limitation of digestion time, the market has caused insufficient digestion of quicklime, which leads to continuous absorption and digestion of quicklime in the subsequent mine trough cloth process, resulting in volume expansion, deteriorating the granulation effect, and easily causing mine trough suspension and production accidents. , increasing the labor intensity and danger of workers

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