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Daqing Refining and Chemical Co.
, Ltd.
skillfully eliminates the hidden danger of heat exchanger crystallization
Recently, the technical personnel of the acetonitrile workshop of Daqing Refining and Chemical Company carried out technical research on the hidden dangers of crystallization of the E805 heat exchanger, and installed two DN25 small valves at the shell side medium brine feed valve of the E805 drying tower condenser to accurately adjust the flow rate of E805 frozen brine, cleverly relieving the hidden danger of crystallization of the heat exchanger and improving the rectification effect of
acetonitrile products.
The cooling medium of the exhaust condenser E805 of the drying tower is frozen brine, in order to prevent the crystallization of the tube bundle, it is necessary to manually adjust the frozen brine feed water DN80 valve frequently, and the flow rate of frozen brine is not easy to accurately control
.
Moreover, every time E805 crystallization is warmed, steam is used to purge the tube layer of the heat exchanger, which not only wastes steam energy, but also causes the loss of acetonitrile products and reduces the yield of
acetonitrile products.
(Li Xin)