Novel circulating fluidized bed flue gas desulfurization system

Abstract

The invention relates to a novel circulating fluidized bed flue gas desulfurization system and belongs to the technical field of semidry-method flue gas desulfurization. According to the technical scheme, the novel circulating fluidized bed flue gas desulfurization system comprises a desulfurization absorption tower, a dust collector, a dust hopper and a dust storage, wherein the a slag-preventing cone is arranged between every two adjacent Venturi nozzles in the nozzle section of the desulfurization absorption tower, a slag-preventing cone is arranged at the upper end of a gap between each Venturi nozzle and the inner wall of the nozzle section, and a fluidizing air system is mounted on the dust hopper and comprises a pressure measuring device for measuring fluidizing air pressure. The novel circulating fluidized bed flue gas desulfurization system which is mainly applicable to flue gas deep purification of industry such as electric power industry, petrochemical industry and smelting industry has the advantages that wall sticking and blocking cannot occur easily in the desulfurization absorption tower, and the system is good in material level measuring reliability and high in accuracy.

Description

technical field [0001] A novel circulating fluidized bed flue gas desulfurization system of the invention belongs to the technical field of semi-dry flue gas desulfurization, and specifically relates to deep purification of flue gas in industries such as electric power, petrochemical, and smelting. Background technique [0002] Circulating fluidized bed flue gas desulfurization technology belongs to the field of semi-dry flue gas desulfurization. In the circulating fluidized bed reactor, the powdery solid desulfurizer is used as the bed material and the flue gas to be treated is vigorously mixed in the desulfurization absorption tower (fluidized bed) and the desulfurization reaction occurs. After desulfurization, the flue gas carries the desulfurizer and leaves the fluidized bed. Enter the dust removal device, where the desulfurizer is separated from the clean flue gas and falls into the ash hopper, and finally the desulfurizer enters the fluidized bed again from the ash hop...

AI Technical Summary

Problems solved by technology

However, while the efficiency is improved, some new problems have arisen, for example: 1. In the traditional desulfurization absorption tower, the desulfurizer bed material will be in the gap between the outlet of the Venturi nozzle, and between the outlet of the Venturi nozzle and the shell. 2. Although the traditional ash hopper also has a fluidizing wind, the function of the fluidizing wind is to make the material fluid and prevent the material from being blocked. The fluidizing wind cannot hold the material smoothly. The pressure of the fluidizing wind is also unstable and cannot be used to express the material level in the ash hopper

Images