A low temperature washing device with methanol
A methanol and low temperature technology, applied in the field of low temperature methanol washing devices, can solve the problems of high energy consumption, low acid gas concentration, large equipment investment, etc., and achieve the effects of low energy consumption, lower system energy consumption, and lower energy consumption.
Active Publication Date: 2018-04-24
QITAIHE BAOTAILONG COAL CHEM IND
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Problems solved by technology
[0003] The present invention aims to solve the problems of high energy consumption, large equipment investment and low acid gas concentration in the prior art, and provides a low-temperature methanol washing device
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specific Embodiment approach 1
[0010] Specific implementation mode one: combine figure 1Describe this embodiment, a low-temperature methanol washing device in this embodiment includes a shift gas separator 2, a shift gas cooler 3, a hydrogen sulfide absorption tower prewash section 5, a hydrogen sulfide absorption tower main wash section 6, and a carbon dioxide absorption tower 7 , carbon dioxide flash tower 8, methanol circulation cooler 10, hydrogen sulfide absorption tower feed cooler 12, hydrogen sulfide rich liquid pump 13, nitrogen cooler 14, tail gas scrubber 15, high-altitude discharge port 16, the first main methanol wash Pump 17, second main wash methanol pump 18, hydrogen sulfide concentration tower 19, first methanol filter 21, lean-rich methanol exchanger 22, nitrogen stripper 23, heat regeneration tower feed pump 24, heat regeneration tower feed Heater 25, thermal regeneration tower 26, condenser 27, prewash / hot flash vapor heat exchanger 28, reflux tank 29, thermal regeneration tower reboiler...
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The present invention relates to a low temperature methanol washing device, and aims to solve the problems of large energy consumption, large equipment investment and low acid gas concentration in the prior art. The low temperature methanol washing device includes a shift gas separator, a shift gas cooler, a hydrogen sulfide absorption tower prewashing segment, a hydrogen sulfide absorption tower main washing segment, a carbon dioxide absorption tower, a carbon dioxide flash column, a methanol circulation cooler, a hydrogen sulfide absorption tower feed cooler, a hydrogen sulfide liquid enrichment pump, a nitrogen cooler, an exhaust gas scrubber, a high-altitude discharge port, a first main washing methanol pump, a second main washing methanol pump, a hydrogen sulfide concentration column, a first methanol filter, a rich and poor methanol switcher, a nitrogen stripper column, a thermal regeneration tower feed pump, a thermal regeneration tower feed heater, a thermal regeneration tower, a condenser, a prewash liquid / thermal flash steam heat exchanger, a reflux tank, a thermal regeneration tower reboiler, an acid gas scrubber, a thermal regeneration tower reflux pump and a poor methanol pump. The low temperature methanol washing device is used to remove impurities in a shift gas.
Description
technical field [0001] The invention relates to a low-temperature methanol washing device. Background technique [0002] Low-temperature methanol washing was originally an acid gas removal process jointly developed by Linde and Lurgi, and it is widely used in the production of synthetic ammonia, city gas, industrial hydrogen, synthetic methanol or other One carbon chemical synthesis process. After years of reform and improvement, the existing low-temperature methanol washing device includes H 2 S absorption tower, CO 2 Absorption tower, medium pressure flash tower, reabsorption tower, methanol thermal regeneration tower and tail gas scrubbing system. The low-temperature methanol washing process is as follows: the crude synthesis gas at about 40°C is cooled to -26°C ~ -10°C and then sent to H 2 S absorber and CO 2 The absorption tower is washed with methanol at low temperature to remove the H 2 S and CO 2 , get purified gas; absorbed H 2 S and CO 2 The rich methanol ...
Claims
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IPC IPC(8): B01D53/18C10K1/16
CPCB01D53/18B01D2252/2021B01D2257/304B01D2257/408B01D2257/504C10K1/16Y02P20/151
Inventor 战丽萍
Owner QITAIHE BAOTAILONG COAL CHEM IND