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Jinxiang Coal Chemical Synthesis Workshop: Record-low steam consumption per ton of methanol Produced by/Journal: Jinxiang Coal Chemical Date: October 28, 2020 Clicks: 11 Good news came from the synthesis workshop a few days ago – the steam consumption per ton of methanol produced there has reached a record low. The steam usage dropped from 1.2 T to below 1.0 T. Since the optimization of the methanol production system on July 10, approximately 4,100 tons of steam have been saved, which is equivalent to about 330,000 yuan in value. In the methanol system of this workshop, the pre-condenser reflux ratio and the atmospheric pressure reflux ratio are difficult to control during operation; as a result, there has consistently been the issue of high volumes of pre-condenser reflux flow and high liquid levels in the pre-condenser reflux tank. While maintaining a stable level of feed input, this workshop increases the frequency of sampling and analysis. Based on the data obtained from analyzing the moisture content in the output, it adjusts the output volume from the pressurized tower and the atmospheric pressure tower as appropriate, while reducing the reflux volume from these towers. By adjusting the reflux volume, it controls the amount of steam added, thereby enabling continuous optimization of the process conditions. At the same time, improving the quality of flushing the water cooler at the outlet of the atmospheric pressure tower helps to reduce the gas temperature, thereby leading to a steady decrease in steam consumption.