Tail gas separation tower

Abstract

The invention relates to a novel dried water-containing tail gas separation tower which can cleanly separate water in the dried water-containing tail gas. The separation tower consists of an area I for washing, cooling, condensation and absorption and an area II for negative-pressure flashing. By the conditional exchanging, transferring and circulating of heat quantity and quality between the area I for washing, cooling, condensation and absorption and the area II for negative-pressure flashing area, the novel dried water-contained tail gas separation tower can realize clean separation of wet steam and incondensable process gas in the dried water-contained tail gas.

Description

[0001] technical field [0002] The invention relates to a novel dry and wet tail gas separation tower for separating moisture steam and dry non-condensable process gas in the dry and wet tail gas. [0003] Background technique [0004] A large amount of dry and wet tail gas is produced in the operation of drying unit and pyrolysis unit. In addition to process gas (such as air, nitrogen, etc.), the dry and wet tail gas also contains a large amount of moisture (such as water vapor or hexane, methanol, etc.) , ethanol, acetic acid and other organic moisture) and a small amount of solid dust, using a washing cooling tower to wash, cool, condense, absorb and dehumidify the moisture in the dry tail gas is the traditional technology of the drying unit. Widely used in process industries such as chemical industry, iron and steel, metallurgy, etc., see the classic dehumidification process of dry and wet tail gas figure 1 . [0005] The dry and wet tail gas enters the washing and c...

AI Technical Summary

Problems solved by technology

[0008] (1) Dry and wet tail gas moisture recovery liquid contains solid dust, which needs to be separated. The separation technology of liquid (liquid formed after the condensation of dry moisture) and solid (dust entrained by drying into the circulating cooling liquid) is complicated and costly

[0009] ⑵The circulating coolant containing dry and wet tail gas entrained with dust is easy to block during the cooling process, which affects the heat exchange efficiency

[0010] (3) The traditional washing cooling tower has a large number of washing cooling recovery process equipment and covers a large area

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