SDFGD (semi-dry flue gas desulfurization) device

Abstract

The invention belongs to the field of environmental engineering, relating to an SDFGD (semi-dry flue gas desulfurization) device. The device comprises an air separating chamber, a dense-phase chamber, a circulating fluidized chamber, a flue gas inlet, a stirring shaft, an ash bucket, a flue gas outlet, a bag-type dust collector, a feeding machine and a roots blower, wherein the dual-layer stirring shaft is arranged in the dense-phase chamber and used for providing more collision chances for an desulfurizing agent and the flue gas and improving the desulfurization efficiency; and the roosts blower is connected with the feeding machine so as to provide fluidized wind power for the circulating fluidized chamber, and a traditional bucket elevator is replaced by the roots blower so as to provide motive power for elevating circulating ashes to arrive at the top of the dense-phase chamber. The device is used for solving the problems of higher energy consumption, repair frequency and cost andthe like for an existing dense-phase circulating flow dry-tower desulfurization device, thus further improving the desulfurization efficiency on the original basis.

Description

technical field [0001] The invention belongs to the field of environmental engineering and relates to a semi-dry flue gas desulfurization device. Background technique [0002] 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, reducing SO2 emissions 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 2009, pointing out that by the end of 2011, the emission of sulfur dioxide from sintering f...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the existing dense-phase circulating fluidized desulfurization device, such as short residence time of flue gas, insufficient use of desulfurizer, large and complex equipment, high energy consumption, high maintenance frequency, etc., and adopts a tower Divide into three rooms, and cancel the design of the bucket elevator

Images