1results about How to "Improve thermodynamic efficiency" patented technology

The utility model discloses a device of recycling DMF in waste water, through primary dehydration tower, secondary dehydration tower and partition wall rectifying column carry out multistage dehydration and rectification, compared with traditional conventional two tower three component separation structure, greatly reduce equipment cost and equipment's floor space, vacuum pump and DMF reation kettle cooperation, the most part dimethylamine in primary dehydration tower, secondary dehydration tower and partition wall rectifying column overhead distillate is sucked to DMF reation kettle with formic acid in partition wall rectifying column column kettle liquid dehydration reaction again obtains DMF, and transports to the partition wall rectifying column and carries out rectification, has reduced byproduct in waste gas and waste liquid, reduced the loss rate of DMF, improved the recovery rate of DMF.