A cyclone flue gas dry catalytic desulfurization device and process

Abstract

The invention relates to a cyclone cylinder flue gas dry-method catalytic desulfurization device and process; the device comprises at least two stages of cyclone cylinder bodies; a flap valve is arranged at a desulfurization product outlet at the bottom of the cyclone cylinder body; the desulfurization product outlet at the bottom of the first-stage cyclone cylinder body is communicated with a desulfurization product inlet at the upper part of the second-stage cyclone cylinder body; a flue gas outlet on the top of the second-stage cyclone cylinder body is communicated with a flue gas inlet at the upper part of the first-stage cyclone cylinder body; a flue gas outlet on the top of the first-stage cyclone cylinder body is communicated with a flue gas humidifier and a dust removing system; the desulfurization product outlet at the bottom of the last cyclone cylinder body is communicated with a spiral conveyor; the spiral conveyor is communicated with a feeding hole of a bucket elevator; the cyclone cylinder further comprises a desulfurization agent storage tank; the desulfurization agent storage tank is communicated with a variable speed spiral conveyor; the variable speed spiral conveyor is communicated with the feeding hole of the bucket elevator; the discharging hole of the bucket elevator is communicated with a high-level desulfurization agent tank; and the high-level desulfurization agent tank is communicated with the desulfurization product inlet on the top of the second-stage cyclone cylinder body through a feeder.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a cyclone flue gas dry catalytic desulfurization device and process. Background technique [0002] Reducing and eliminating sulfur dioxide pollution has always been a major environmental issue concerned by the international scientific community and governments of various countries. In April 2001, the book "Technical Handbook of Sulfur Dioxide Pollution Control from Coal Burning" was jointly published by Chemical Industry Press and Environmental Science and Engineering Publishing Center , summarizing and introducing the desulfurization technology achievements of various countries in the world, and also disclosed many successful cases of coal-fired boiler desulfurization technology in my country. [0003] There are three main types of existing desulfurization technologies: one is flue gas wet desulfurization; the other is dry desulfurization in furnace; the third is...

AI Technical Summary

Problems solved by technology

From the analysis of the desulfurization efficiency of the above-mentioned desulfurization technologies, the flue gas wet desulfurization effect is the best, and its desulfurization rate can reach more than 95%. However, the project investment of the flue gas wet desulfurization is huge. The project investment accounts for 10-15% of the total investment of the power plant, and the power consumption is large and the operating cost is high, which is generally unaffordable for small and medium-sized enterprises

The existing common flue gas dry desulfurization technology not only has the above shortcomings, but also has low desulfurization efficiency. Although the dry desulfurization in the furnace has low investment and relatively low operating costs, its disadvantage is that the desulfurization efficiency is low, generally only about 50% , unable to meet the national sulfur dioxide emission standards

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