Counter-flow type return-flow condensation pipe

Abstract

The present invention relates to a glass instrument, in particular, it relates to a counter-current reflux condenser pipe. It includes an outer pipe and an inner pipe which is passed through upper and lower two ends of said outer pipe, and it is mainly characterized by that one side of upper portion of said outer pipe is equipped with a water inlet pipe, its another side is equipped with an air vent pipe, on the air vent pipe a valve is set, the lower portion of said outer pipe is equipped with a drain pipe which is upwards extended and whose upper end position is not lower than upper end portion of said outer pipe, the upper end of said drain pipe and the tail end of said air vent pipe are combined and formed into a water outlet pipe. Said invention can change the flowing direction of cooling water and form a counter-current relationship between two fluids in inner pipe and outer pipe so as to greatly raise heat exchange efficiency of condenser pipe and its cooling effect.

Description

technical field [0001] The invention relates to a glass instrument, in particular to a countercurrent reflux condensation tube. Background technique [0002] The condensing tube is an indispensable cooling part in the distillation and reflux device. The existing condensing tube is usually composed of an inner tube and an outer tube, and the outer tube is provided with a water inlet and a water outlet. Its working principle is that the cooled fluid flows through the inner tube, and the water as the coolant flows through the outer tube. The hot and cold fluids exchange heat through the inner tube wall, and the fluid in the inner tube is absorbed by the outer tube. water cooled. The condensing tubes in the reflux device are installed vertically above the flask, and the hot fluid generated in the flask moves upward along the inner tube, and flows back down after being cooled, so it is also called a reflux condensing tube. Since the reflux condenser is installed vertically, if ...

AI Technical Summary

Problems solved by technology

Therefore, in the reflux operation of some fluids with a boiling point higher than 140°C, the air condenser can only be used as the coolant, but because the heat transfer efficiency of air is much lower than that of water, the air condenser The cooling effect is very poor, the cooled fluid will have more volatilization loss, and it is difficult to perform satisfactory reflux operation

Since the existing reflux condenser is limited by the boiling point temperature range of the cooled fluid, its application range is small

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