Low-concentration DMF wastewater treatment system by distillation method with multiple intermediate heat exchangers
The invention relates to a low-concentration DMF wastewater treatment system by a distillation method with multiple intermediate heat exchangers. The system comprises a raw material preheater, a normal-pressure rectification tower, a plurality of intermediate reboilers, an overhead condenser and a t...
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Main Authors | , , , , |
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Format | Patent |
Language | Chinese English |
Published |
31.05.2017
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Subjects | |
Online Access | Get full text |
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Summary: | The invention relates to a low-concentration DMF wastewater treatment system by a distillation method with multiple intermediate heat exchangers. The system comprises a raw material preheater, a normal-pressure rectification tower, a plurality of intermediate reboilers, an overhead condenser and a tower kettle reboiler, wherein DMF wastewater is preheated to a bubble point in the preheater and is separated in the rectification tower. According to the system, consumption of high-grade steam can be reduced by adopting the plurality of intermediate reboilers, and the material extracted from the side line of an intermediate plate is heated by steam having a relatively low energy grade, so that the consumption of steam at the tower bottom can be saved, and the thermodynamic efficiency of a separation system can be improved. Compared with a traditional rectification method, the system has the advantage that the thermodynamic efficiency can be increased by over 39 percent.
本发明涉及种带多个中间换热器精馏法处理低浓度DMF废水系统,该系统包括原料预热器、常压 |
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Bibliography: | Application Number: CN201611167122 |