Suzhou Jufeng Electrical Insulation System Co., Ltd.

Suzhou Suzhen Bioengineering Co., Ltd

Wei Ji

Wei Wang

Yun Zhang

Yu Xia

Cheng Zhou

Weihong Xu

Juanjuan Qian

Juan Ding

Guoxing Ru

Guozhu Shi

Ji An Luo

Bin Liu

Yaoxiang Mo

Zhitao Gu

The present invention relates to a method of insulating a motor, comprising: providing a impregnating resin; heating up the motor windings with electricity to 100-120° C., and potting the motor windings with the impregnating resin for 2-5 min at that temperature; heating up the motor windings with electricity to 140-160° C., and trickling the impregnating resin for 3-8 min for insulation; heating up the motor windings with electricity to 165-175° C., and curing for 15-45 min. The method of insulating a motor provided by the present invention has a higher resin filling level and a higher resin utilization rate, as well as faster curing speed.

Method of insulating a motor

A method for extracting polyol from a fermentation process is disclosed. The preparing method includes rectifying and purifying PDO (1,3-propanediol) from a polyol fermentation broth after concentration to form a steam condensate, wherein the concentration is a evaporative dehydration; and filtering the steam condensate through a reverse osmosis membrane to form a concentrated solution, wherein the retentate of the reverse osmosis flows back to the evaporative dehydration, and the penetrant of the reverse osmosis can be reused as a fermentation ingredient, as cleaning water or for sewage treatment; and the water content of the concentrated solution after the evaporative dehydration is 5-25 wt %; and the yield of PDO is 99.5%. The preparing method meets the requirements of water resources recycling, reduces the production loss of PDO and BDO (2,3-butanediol) during the concentration, and greatly cuts down on the amount of wastewater.

Method for extracting polyol from a fermentation process

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Suzhou, China

Wei Ji