Regeneration process for washing and spraying methanol by low-temperature methanol

A low-temperature methanol washing, methanol technology, applied in the preparation of organic compounds, organic chemistry, chemical instruments and methods, etc., can solve the problems of reducing concentration, increasing material consumption and energy consumption in acid gas treatment process, and reducing operation and design pressure. , The effect of reducing equipment investment and consumption
CN101735010AActive Publication Date: 2010-06-16WISON ENG +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WISON ENG
Publication Date
2010-06-16

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Abstract

The invention relates to a regeneration process for washing and spraying methanol by low-temperature methanol, which comprises the following steps of: spraying the methanol by virgin gas, cooling the virgin gas, carrying out gas-liquid separation on the virgin gas, carrying out flash evaporation on the methanol and a water condensate, reheating the methanol and the water condensate, rectifying and regenerating the methanol, carrying out flash evaporation on the methanol sprayed by the virgin gas and the water condensate by a flash tank, delivering the flashed vapor of the condensate into an H2S concentration tower, delivering into tail gas finally, carrying out heat exchange between the decompressed methanol, the decompressed water condensate and H2S gas at an outlet of an H2S distillate heat exchanger, delivering the reheated methanol and the reheated water condensate into a methanol water knockout tower for separation, delivering methanol gas at the top of the methanol water knockout tower into a methanol regeneration tower and carrying out rectification and regeneration. Compared with the prior art, the invention has the advantages of low energy consumption, low operating pressure of the heat exchanger, high concentration of H2S in acid gas and the like.
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Description

technical field

[0001] The invention relates to the field of solvent regeneration of a gas absorption device, in particular to a regeneration process for washing and spraying methanol at low temperature. Background technique

[0002] The low-temperature methanol washing process has been widely used in gas purification devices such as synthetic ammonia, synthetic methanol and other oxo synthesis, hydrogen production, city gas and natural gas desulfurization. 相关专利有CN1491882(2005),CN1451602(2005),CN1386699(2004),CN1107382(1997),CN1113824(1997),CN1063086(1994),CN88100529(1988),US4609384(1986),CN85107195(1986),US4430316( 1984), US4324567 (1982). The low-temperature methanol washing process is to use methanol to absorb the acid gas in the mixed gas, and then separate the methanol from the acid gas through decompression desorption, air stripping, and heating, so as to purify the mixed gas and recover methanol.

[0003] The raw material gas of the low-temperature methanol washing p...

Claims

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