Coal gas desulfurization device

Abstract

A coal gas desulfurization device comprises a desulfurization tower (1), a decyanation tower (7), deacidification towers (8), a sulfur recovery system and a tube furnace (13), wherein a rich solution of the desulfurization tower (1) is discharged into a rich solution tank (2), barren solutions discharged by the deacidification towers (8) are discharged into a barren solution tank (3) through a barren solution return pipe and a barren solution return pump, the rich solution tank (2) is communicated with the bottom of the decyanation tower (7) through a rich solution pump and a rich solution delivery pipe, the rich solution delivery pipe penetrates through a decyanation rich solution heat exchanger (6), and both the rich solution delivery pipe and the barren solution return pipe penetrate through a barren and rich solution heat exchanger (4); a heat exchange tube of the tube furnace (13) is communicated with tower pots of the deacidification towers, and a steam pipe of the tube furnace (13) is communicated with a heat exchange tube of the decyanation rich solution heat exchanger (6). According to the device, a desulfurization rich solution is heated directly through the tube furnace, so that the operation cost is reduced, the higher working temperature can be obtained under the lower pressure, the requirements of industrial production can be met, and the operation cost is low.

Description

technical field [0001] The invention relates to a gas production device, in particular to a gas desulfurization device. The invention uses a tube furnace to directly heat the desulfurization-rich liquid, improves the thermal efficiency of the desulfurization process, saves energy, reduces production costs, and provides reliable guarantee for normal production operation. Background technique [0002] At present, desulfurization production equipment such as coal gas AS or FAS mainly uses steam to heat the process system. Due to the shortage of global water resources and the strict requirements of steam on water quality, at the same time, the heat loss of steam heating is large, the operating cost is high, and the pressure fluctuation is relatively large. Therefore, designing a gas desulfurization device with less heat loss and lower operating costs is a technical problem that needs to be solved at present. Contents of the invention [0003] The technical problem to be solv...

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Problems solved by technology

[0002] At present, desulfurization production equipment such as coal gas AS or FAS mainly uses steam to heat the process system. Due to the shortage of global water resources and the strict requirements of steam on water quality, at the same time, the heat loss of steam heating is large, the operating cost is high, and the pressure fluctuation is relatively large. Therefore, designing a gas desulfurization device with less heat loss and lower operating costs is a technical problem that needs to be solved at present

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