Cleaning device for plate heat exchanger

Abstract

The invention discloses a cleaning device for a plate heat exchanger. The cleaning device for the plate heat exchanger comprises the plate heat exchanger (15) and a control system (7). The plate heat exchanger (15) is connected with a reaction still (8) and an ultrasonic reaction device (10). The control system (7) is connected with an energy converter (11) and the ultrasonic reaction device (10). The cleaning device for the plate heat exchanger can remove scale quickly and thoroughly.

Description

technical field [0001] The invention relates to the technical field of heat exchangers, in particular to a cleaning device for plate heat exchangers. Background technique [0002] The plate heat exchanger is a high-efficiency heat exchange device that has been rapidly popularized in the past 10 years. The plate heat exchanger in water mainly has high heat transfer coefficient, large logarithmic average temperature difference, small footprint, light weight, low price, and small end temperature difference. , It can realize the heat exchange of various media and easily change the heat exchange area or process combination, etc. It has been widely used in electric power, heat supply, chemical industry and other industries. At present, fouling exists in all plate heat exchangers. After fouling, the heat exchange equipment is easy to block and has poor corrosion resistance. After the scale is formed in the plate heat exchanger, the heat transfer efficiency will decrease, the circu...

AI Technical Summary

Problems solved by technology

At present, scaling phenomenon exists in all plate heat exchangers. After scaling, the heat exchange equipment is easy to block and has poor corrosion resistance.

After the scale is formed in the plate heat exchanger, the heat transfer efficiency will decrease, the circulating water flow area will become smaller, and the flow resistance will increase. For every 1mm increase in equipment fouling, the heat transfer coefficient will decrease by 9-9.6%, and the energy consumption will increase by more than 10%. , which leads to a substantial increase in the operating energy consumption of the entire system and an increase in heat exchange costs

It not only causes waste of heat energy to users, affects economic benefits, but also brings many difficulties to operation, maintenance and overhaul.

Shorten the service life of the equipment, scaling will cause serious under-scaling corrosion, especially the pinhole corrosion of the plate by chloride ions, resulting in corrosion and leakage of the equipment, shortening the service life of the heat exchange equipment, and even causing the heat exchanger to advance scrapped

Due to the thinness of the plate, the plate is easily deformed during the cleaning of hard dirt, and the sealing gasket is easily damaged; in order to ensure the quality of reassembly, it must be replaced, and the maintenance cost is high

Maintenance is difficult and expensive. The current descaling method is to disassemble the plate heat exchanger and pickle it piece by piece or manually clean it. The descaling is difficult. During assembly, the sealing strip and leaking plates must be replaced, and the probability of assembly leakage is high. , high maintenance costs

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