Converter primary flue gas wet type classification dust removing apparatus

Abstract

The present invention relates to a converter primary flue gas wet type classification dust removing apparatus, which comprises a first-stage coarse dust removing device, a second-stage fine dust removing device, a third-stage fine dust removing device, a fan and a circulating water system, wherein the first-stage coarse dust removing device, the second-stage fine dust removing device, the third-stage fine dust removing device, the fan and the circulating water system are sequentially connected, the first-stage coarse dust removing device is provided with a spraying device I and a sludge discharge valve I, the second-stage fine dust removing device is provided with a spraying device II and a sludge discharge valve II, the circulating water system comprises a sewage treatment device and a circulating pump, the sludge discharge valve I and the sludge discharge valve II are respectively connected with an inlet of the sewage treatment device, and an outlet of the sewage treatment device is respectively connected with the spraying device I and the spraying device II through the circulating pump. The converter primary flue gas wet type classification dust removing apparatus has characteristics of simple structure, stable and reliable operation, low investment, and low operation and maintenance cost. With the three-stage dust removing, dust removing efficiency is improved, it is ensured that the dust concentration in the flue gas discharged after purification is less than or equal to 10 mg / m<3>, the dust concentration in the flue gas through the apparatus of the present invention is lower than the dust concentration in the flue gas through the existing dry dust removing technology and the existing wet dust removing technology, and the discharging standard meets the international environmental protection standard.

Description

technical field [0001] The invention relates to a dust removal device, in particular to a converter primary flue gas wet classification dust removal device. Background technique [0002] At present, the primary flue gas dedusting technology of converter mainly adopts dry electrostatic precipitator and wet precipitator. Dry electrostatic precipitator technology is a relatively new technology, with low operating costs (saving water and electricity), high dust removal efficiency (up to 99.9%, dust concentration in exhaust gas ≤ 15mg / m 3 ), but at the same time has the disadvantages of high one-time investment, high failure rate, great impact on production, and heavy maintenance workload, which makes it difficult for many users to accept. Wet dust removal technology is a traditional dust removal technology. Although it has the advantages of one-time investment half of dry method and stable and reliable operation, it also has the disadvantages of high operating cost (energy cons...

AI Technical Summary

Problems solved by technology

Dry electrostatic precipitator technology is a relatively new technology, with low operating costs (saving water and electricity), high dust removal efficiency (up to 99.9%, dust concentration in exhaust gas ≤ 15mg / m 3 ), but at the same time has the disadvantages of high one-time investment, high failure rate, great impact on production, and heavy maintenance workload, which makes it difficult for many users to accept

Wet dust removal technology is a traditional dust removal technology. Although it has the advantages of one-time investment half of dry method and stable and reliable operation, it also has the disadvantages of high operating cost (energy consumption is about twice that of dry method) and poor dust removal effect. Especially the dust concentration in the exhaust gas is as high as 50mg / m 3 ~100mg / m 3 , can no longer meet the environmental protection standards in some areas of China. Although the market share is relatively high, it cannot meet the environmental protection standards and cannot be adopted. At the same time, many existing wet dust removal projects are also facing the problem of environmental protection failure.

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