Dust collection and mercury removal integrated electric-bag composite dust collector

Abstract

The invention discloses a dust collection and mercury removal integrated electric-bag composite dust collector, and relates to a dust collector. The dust collector comprises a preheater, an electric-bag composite dust collector and an active carbon adsorbent spraying device, wherein an air inlet of the preheater is connected with a smoke outlet of a boiler; the electric-bag composite dust collector consists of a pre-level electric field dust collection area and a post-level filter-bag filtering area; a smoke inlet of the pre-level electric field dust collection area is connected with a smoke outlet of the preheater; a smoke outlet of the pre-level electric field dust collection area is connected with a smoke inlet of the post-level filter-bag filtering area; the active carbon adsorbent spraying device is arranged between the pre-level electric field dust collection area and the post-level filter-bag filtering area; and the smoke flowing to the post-level filter-bag filtering area is discharged to the atmosphere through a chimney. The dust collector disclosed by the invention has higher efficiency in collecting fine dust PM2.5 than an electrostatic dust collector and bag-type dust collector, and also has a good effect in collecting tiny mercury particles. Due to the long ash removal period, the acting time of the adsorbent on mercury is prolonged, and the mercury collection efficiency is improved.

Description

technical field [0001] The invention relates to a dust collector, in particular to an electric bag composite dust collector integrating dust removal and mercury removal. Background technique [0002] With the aggravation of pollution and the imminent signing of the international mercury control convention, it has become a consensus at home and abroad to control mercury emissions from coal-fired power plants. The Chinese government has attached great importance to the prevention and control of mercury pollution. The State Council has forwarded relevant pollution control notices many times, and has officially released the "Twelfth Five-Year Plan" for Comprehensive Prevention and Control of Heavy Metal Pollution. At present, my country's coal-fired power plant atmospheric mercury pollution control pilot work has been officially launched, and the emission limits of mercury and its compounds have been stipulated in the new emission standard "Emission Standard of Air Pollutants fo...

AI Technical Summary

Problems solved by technology

However, a large amount of high-concentration flue gas will consume a huge amount of activated carbon adsorbent, resulting in high cost of mercury removal, and will cause the final fly ash to be mixed with a large amount of activated carbon adsorbent, which will have a negative impact on the quality of the fly ash. Some fly ash users (including cement plants) find it difficult to accept fly ash mixed with activated carbon, which affects the secondary utilization of fly ash

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