Self-cleaning spiral plate sewage heat exchanger

Abstract

The invention discloses a self-sewage-cleaning type spiral plate sewage heat exchanger. According to the heat exchanger, a sewage heat exchange wide flow way and a clean water heat exchange narrow flow way in a shell are wound around in a side-by-side manner to form a spiral heat exchange main body, and a plurality of sewage cleaning units and sewage discharging plates are formed in the spiral heat exchange main body, wherein the inner side surface of an outer side spiral plate of the sewage heat exchange wide flow way is provided with the protruding arc-shaped guide plates, and the arc-shaped guide plates are combined to form the sewage cleaning units; and the sewage discharging plates are evenly distributed at the lower ends of the sewage cleaning units, and inclined angles are formed between the sewage discharging plates and the horizontal direction. According to the heat exchanger, sewage bonded on the sewage wide flow way heat exchange plate can be effectively cleaned up, happening of a scale formation hanging wall is obstructed, and self sewage cleaning can be reliably achieved. Continuous sewage discharging can be achieved, and secondary appearing of sewage is prevented. The self-sewage-cleaning type spiral plate sewage heat exchanger has the prominent substantive beneficial effects and obvious advantages of being novel and unique in conception, compact and reasonable in structural design, stable and reliable in work performance, excellent in scale prevention and sewage cleaning effect, economical, practical, energy-saving, efficient, and capable of obviously improving the heat exchange efficiency and obviously prolonging the service life. The self-sewage-cleaning type spiral plate sewage heat exchanger is the most ideal sewage heat exchange equipment in the field at present.

Description

technical field [0001] The invention relates to a spiral plate heat exchanger, in particular to high-temperature industrial wastewater and urban sewage heat exchange occasions used in coal chemical industry, high-temperature coking, petrochemical industry, blast furnace slag removal and other industries, and can realize automatic heat exchange during the heat exchange process. A spiral plate heat exchanger for decontamination. Background technique [0002] Spiral plate heat exchanger has the advantages of long heat transfer channel, compact structure, high heat transfer efficiency, high temperature and high pressure resistance, etc. In actual use, due to the large amount of impurities and dirt in the sewage, some of the dirt will adhere to the heat exchange surface during the flow of the sewage in the spiral plate heat exchanger, and some dirt will be deposited on the heat exchanger. The bottom cannot be discharged together with the sewage, which reduces the heat exchange e...

AI Technical Summary

Problems solved by technology

The first is that the use of a detachable spiral plate heat exchanger requires professionals to regularly disassemble and manually clean it, which wastes a lot of manpower and material resources, and cannot be realized in larger equipment and complex environments.

The second is to open a sewage outlet on the outside of the ordinary spiral plate heat exchanger, which needs to be backwashed when the production is stopped and the pump is stopped. Even frequent flushing cannot completely solve the problem of dirt deposition and dirt scaling on the wall in the flow channel. Sewage effect is still unsatisfactory

The third is that a conical settling bucket is added to the lower part of the spiral plate heat exchanger, which solves the problem of part of the dirt sedimentation, but the sewage passes through the spiral heat exchange body instantly from the bottom to the top, the heat exchange time is short, and the heat exchange efficiency is extremely low. The spiral plate heat exchanger has the advantages of long heat transfer channel and high heat transfer efficiency.

In addition, at the connection between the spiral heat exchange body and the lower conical settling hopper, there is a fluid Bernoulli effect due to the different flow rates of the sewage. When the sewage flow fluctuates, the sediment will flow out again, and there is no fundamental solution to the heat exchange plate. Fouling and wall hanging problem

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