Vertical falling film heat exchanger

Abstract

The invention provides a vertical falling film heat exchanger, comprising: a cylinder vertically arranged and provided with openings at both ends, an air inlet at the upper part of one side for insertion of an intake pipe, and a liquid outlet at the lower part of the other side; an exhaust distribution plate disposed on the inner wall of one side of the cylinder and provided with distribution holes in both sides; upper and lower tube plates respectively disposed on the upper and lower opening ends of the cylinder; a plurality of heat exchange pipes disposed at the inner part of the cylinder, and two ends of which are respectively inserted into the upper and lower tube plates; at least one liquid collecting plate provided with liquid collecting holes in the surface, sleeving the heat exchange pipe and provided with a notch on the outer edge; a water inlet chamber, of which an open end cover is arranged on the upper tube plate, the side wall is provided with a water inlet for insertion of a water inlet pipe, and the closed end is provided with an exhaust port for insertion of an exhaust pipe; a drainage chamber, of which an open end cover is arranged on the lower tube plate and the closed end is provided with a drainage port for insertion of a drainage pipe. The falling film heat exchanger improves the heat exchange performance on both sides of the shell side and pipe side, greatly improves the heat exchange performance, reduces the cost, is simple in structure, avoids aspirating liquid, and improves system reliability.

Description

technical field [0001] The invention belongs to the technical field of water evaporation heat exchangers in waste water concentration heat pump systems, and in particular relates to a vertical falling film heat exchanger. Background technique [0002] Wastewater treatment methods are the use of physical, chemical and biological methods to treat wastewater, purify wastewater, reduce pollution, and achieve wastewater recycling and reuse, making full use of water resources. [0003] Some industrial processes will produce wastewater, which is not allowed to be discharged directly, and the treatment of wastewater is charged according to the volume, which is very expensive. At this time, the wastewater needs to be concentrated. That is, by heating the waste water to evaporate the water, the waste water is concentrated, and the concentration ratio can reach 1%, thereby greatly reducing the amount of waste water treatment and reducing the treatment cost. Heat pump is a relatively e...

AI Technical Summary

Problems solved by technology

However, in the falling film heat exchanger provided by this patent, the inlet end, that is, the suction pipe directly corresponds to the heat exchange pipe, which leads to uneven air distribution and affects the heat exchange efficiency.

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