Semidry process fume desulfurizing and dedusting integrated device used for SO2

Abstract

The invention belongs to the field of environmental engineering and relates to a semidry process fume desulfurizing and dedusting integrated device. the device comprises a fluidifying tank, a circulating fluidifying region, an injection orifice, a fine grain region, a separation region, a fume inlet, a fume outlet and a Roots blower, wherein the separation region is arranged at the top of the whole device, dust-containing fume is separated by virtue of the separation region, solid part is directly fallen into the fine grain region and the circulating fluidifying region to be continuously recycled; and the Roots blower is connected with the bottom of the fluidifying tank and provides fluidifying power for desulfurizer deposited at the bottom of the fluidigying tank and the whole circulating fluidifying region. In the semidry process fume desulfurizing and dedusting integrated device provided by the invention, a circulating ash conveying system is eliminated, and the integrated device can be used when the concentration of SO2 is lower than 1500mg / Nm<3>.

Description

[0001] technical field [0002] The invention belongs to the field of environmental engineering and relates to SO 2 Concentration below 1500mg / Nm 3 The semi-dry flue gas desulfurization and dust removal integrated device. Background technique [0003] The iron and steel industry is a highly material- and energy-intensive industry. It is not only a major consumer of raw materials, but also a major energy-consumer and polluter. To maintain sustainable development, the steel industry must reduce environmental pollution. During the "Eleventh Five-Year Plan" period, the emission reduction of SO 2 It is the focus of China's environmental protection. Similarly, during the "Twelfth Five-Year Plan" period, my country will still focus on energy conservation, consumption reduction, emission reduction and pollution control. The Ministry of Industry and Information Technology released the "Implementation Plan for Sintering Flue Gas Desulfurization in the Iron and Steel Industry" in...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of SO in the flue gas in the existing dense phase dry tower device. 2 When the concentration is low, there are problems such as waste of equipment resources and high energy consumption, but the integrated design of desulfurization and dust removal is adopted, and the present invention also solves the problems of easy collapse of the existing circulating fluidized bed and high energy consumption due to the existence of the Venturi tube. The problem

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