Split-flow rectisol device
A low-temperature methanol washing and split-flow technology, which is applied in the field of gas purification, can solve the problems of large mutual influence on heat balance of heat exchangers, high interdependence of logistics, and complex heat exchange network, so as to reduce energy consumption and complexity , the effect of saving steam consumption
Active Publication Date: 2009-12-02
SHANGHAI INT ENG CONSULTING
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The invention discloses a split-flow rectisol device, which comprises an absorption tower, a medium pressure flash tower, a reabsorber, a hot regenerating tower, a methanol water tower, a tail gas washing tower, a plurality of heat exchangers, pumps and a circulation compressor; and the upper section of the reabsorber is provided with a flash distillation section. The split-flow rectisol device is not provided with a CO2 product tower, and reduces the complexity of the flow and the investment on the premise of ensuring that CO2 product gas is qualified. The split-flow rectisol device is provided with a novel split-flow rectisol (acid gas removal) flow for absorption from a semi-lean methanol liquid feeding absorption tower on the upper section of the reabsorber, reduces the dosage of lean methanol of the absorption tower, further can reduce the energy consumption of the hot regenerating tower for hot regeneration, and saves the dosage of gas stripping nitrogen, consumption of steam, and low level cold quantity used when the lean methanol is cooled.
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