Energy-saving inter-section high low temperature gradient alcohol-division two-stage alcohol generation method and energy-saving inter-section high low temperature gradient alcohol-division two-stage alcohol generation device
A high-low temperature, energy-saving technology, applied in chemical instruments and methods, bulk chemical production, sustainable manufacturing/processing, etc., can solve the problem of low total alcohol net value in the synthesis loop, high circulating cooling water consumption, poor catalyst utilization, etc. problem, to achieve the effect of high total alcohol net value, low compression power consumption, and avoid heat accumulation
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[0046] The above-mentioned energy-saving two-stage alcohol production device with high and low temperature gradient alcohol separation between stages is used for large-scale methanol production.
[0047] An energy-saving two-stage alcohol production method with high and low temperature gradient alcohol separation between stages, comprising the following steps:
[0048] (1), the fresh synthesis gas passes through the third gas-gas heat exchanger (10) to exchange heat with the mixture containing synthesis gas and methanol steam output from the second reactor (9), and the cycle gas of the synthesis loop passes through the first gas-gas heat exchanger (10). The gas heat exchanger (2) exchanges heat with the mixture containing synthesis gas and methanol steam output from the first reactor (1), and the fresh synthesis gas and cycle gas preheated to 200-220°C are mixed and passed into the first The air inlet at the top of the reactor, the synthesis gas passes through the first cataly...
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