Desulfurization process of blast furnace gas

Abstract

The invention discloses a desulfurization process of a blast furnace gas, which comprises the following steps: 1) preparing two same adsorption towers filled with molecular sieve resin, denoted as anadsorption tower A and an adsorption tower B; 2) introducing the cooled blast furnace gas into the adsorption tower A for adsorption, when the sulfur content of gas at the outlet of the adsorption tower A is more than 5 mg / m<3>, switching the blast furnace gas into an adsorption tower B for continuous adsorption, and stopping the operation of the adsorption tower A at the same time; 3) guiding outand heating a small amount of completely desulfurized coal gas, introducing the desulfurized coal gas into the adsorption tower A for high-temperature desorption regeneration, treating the gas afterthe high-temperature desorption regeneration through a recovery process of a sulfur-containing compound, and cooling the regenerated adsorption tower A for later use; and 4) alternately using the regenerated adsorption tower A and the adsorption tower B so as to complete continuous removal of the sulfur-containing compounds in the blast furnace gas. The method disclosed by the invention can realize recycling of sulfur resources, and is low in equipment investment and low in operation cost.

Description

technical field [0001] The invention relates to a desulfurization process of blast furnace gas. Background technique [0002] In the past ten years, with the widespread application of blast furnace gas dry bag dust removal + residual pressure turbine power generation (TRT), the pressure energy and heat energy of blast furnace gas have been fully recovered. After the pressure energy and heat energy are recovered by the TRT device, the blast furnace gas is sent to the fuel for hot blast stoves, heating furnaces, coke ovens, boilers, etc. [0003] The raw coal gas produced in ironmaking production contains a certain concentration of hydrogen sulfide and carbonyl sulfide, which need to be further removed. However, direct wet removal requires large air volume, high investment, insufficient concentration of sulfur compounds, low desulfurization efficiency, and difficult production control. Contents of the invention [0004] In view of the above-mentioned technical problems exi...

AI Technical Summary

Problems solved by technology

However, direct wet removal requires large air volume, high investment, insufficient concentration of sulfur compounds, low desulfurization efficiency, and difficult production control.