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问题的提出流程:每个精馏塔设两个再沸器(即列管式加热器),其作用是用蒸汽加热塔釜液以进行循环精馏,外来蒸汽减压后进到再沸器,与塔釜液通过列管进行顺流热交换,蒸汽从再沸器出来再去原料预热器加热粗甲醇,最后以冷凝液的形式送到冷凝水槽。原热能利用:蒸汽减压到3kg/cm~2(atu),其饱和蒸汽温度 tH=142.92℃将釜液加热到106℃±,再沸器排出蒸汽温度还有105～115℃。粗甲醇预热器来料温度一般72℃±,预热后的温度要求82～84℃。再沸器液位投运以前蒸汽耗量为2.0～2.3吨/时。表现出热量有余,常常打开支路使蒸汽白白
Proposed process of the problem: Each distillation column set up two reboilers (ie, tubular heaters), its role is to use steam heating tower bottoms liquid for recirculation distillation, external steam decompression into the reboiler, Co-current heat exchange with the tower bottoms through the tube, the steam from the reboiler and then go to the raw material preheater to heat the crude methanol, finally sent to the condensation tank as a condensate. The original heat utilization: steam decompression to 3kg / cm ~ 2 (atu), the saturated steam temperature tH = 142.92 ℃ heating the kettle liquid to 106 ℃ ±, reboiler steam temperature of 105 ~ 115 ℃. Crude methanol preheater incoming temperature is generally 72 ℃ ±, preheated temperature requirements of 82 ~ 84 ℃. Before the reboiler liquid level transports steam consumption is 2.0 ~ 2.3 tons / hour. Show more than heat, often open the branch so that the steam white