Smoke and dust comprehensive processing technique, smoke and dust trapping device and combined dust remover for electric arc furnace

Abstract

The invention includes an arc furnace smoke-dust comprehensive disposal process and a smoke-dust catching device and a combined dust catcher. The smoke-dust comprehensive disposal technique has the following steps: a semi-sealed cover and a roof clearstory are combined to collect smoke dust; a three-level wet dust catcher, a one level water washing or striking assemble and a two-level venturi dustcatcher or a venturi dust catcher provided with a desulfurizing device are adopted to remove dusts; a multilevel heat-treatment water toughening settlement is carried out. The arc furnace smoke-dustcomprehensive catcher of the invention adopts the three-level wet dust catching method to completely dissolve the SO2 gas contained in the gas flow carrying tiny dusts, so as to reduce the emission concentration of the SO2, which is also attributed to the good smoke collecting effect of the smoke-collecting cover.

Description

technical field [0001] The invention belongs to the mixture separation technology in the technical field of operation and transportation, and in particular relates to a comprehensive treatment method for electric arc furnace smoke and dust and equipment for use. Background technique [0002] The existing electric furnace dust collection system adopts a clamp-shaped fume exhaust hood installed on the furnace top and a furnace door fume exhaust hood above the furnace door to exhaust the smoke outside the furnace. The smoke and dust replenishment, especially during the oxygen blowing period, cannot effectively replenish the smoke and dust, causing smoke around the electric arc furnace and even above the electric arc furnace to affect the environment. [0003] At present, most electric arc furnaces use pulse bag filter, which has strong dust removal ability and high dust removal efficiency. However, generally after a period of use, the dust removal efficiency will drop signific...

AI Technical Summary

Problems solved by technology

In the future, after the filter material is seriously clogged and the efficiency drops, due to the high cost of replacement, people will often feel that it is a pity to discard the filter material, and it is useless to keep it.

[0004] In addition, at present, in the flue gas collection of electric arc furnaces, the method of detecting the dust concentration and dust temperature in the working of the electric furnace is used to directly control the dust removal air volume. Since the flue gas temperature in different process stages varies and changes irregularly, the temperature cannot directly reflect Operating Conditions of Electric Furnace

Although from an engineering point of view, temperature transmitters can be used in harsh industrial situations, with strong anti-interference ability, good working stability, high control accuracy, safety and reliability, maintenance-free and cheap, but in the entire smelting process, the temperature Uncertainty makes it difficult to control

The dust concentration detection device is expensive, poor in stability, high in failure rate, large in maintenance, and it is difficult for the data collection of on-site detection points to be widely representative.

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