Sewage heat exchange device for large-diameter shell-tube type fluidized bed

Abstract

The invention discloses a sewage heat exchange device for a large-diameter shell-tube type fluidized bed, which is provided with a sewage passageway and a clear water passageway, wherein an area for carrying out heat exchange through the tube wall exists between the sewage passageway and the clear water passageway. The sewage heat exchange device is characterized in that the sewage passageway is positioned in the heat exchange area, and a large-diameter pipeline with the diameter of 50-120mm is selected as a sewage pipeline; in addition, a solid particle introducing port is arranged at a water inlet of the sewage large-diameter passageway, and a solid particle storing and conveying assembly is connected to the rear end of the solid particle introducing port, wherein the diameters of the solid particles are 2-8mm, and the volume fraction of the solid particles is 2-8 percent; and the density of the solid particles is more than that of sewage. The sewage heat exchange device disclosed by the invention thoroughly overcomes the defects that a heat exchange is blocked by sundries and the heat exchange property is poor in the utilization of sewage or surface water cold and hot sources, can provide cold and hot sources for a heat pump, can be also used for cooling circulating water of large-size equipment or used for occasions, such as heating, air-conditioning and domestic water and has remarkable environment-friendly economic benefits.

Description

technical field [0001] The invention belongs to the technical field of energy utilization and relates to a heat exchange device which can automatically decontaminate, strengthen heat exchange and prevent scale inhibition by using sewage or surface water cold heat source. Background technique [0002] The use of sewage or surface water cooling and heat sources can alleviate the current energy shortage situation, and has good energy-saving effects, environmental protection benefits and economic benefits. Provide a new way of thinking. The reason why these cold and heat sources are not used and popularized in a large area is mainly because their water quality cannot meet the water quality standards required in the current water circulation system. The performance drops significantly, and it doesn't even work. In actual operation, the water pump and heat exchanger are often blocked by dirt. For this reason, the author obtained two patents, CN200410020630.1 and CN200420031799.2...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, effectively solve the problems of the clogging of dirt and the complex technological process and huge land occupation caused by the prior art to realize anti-clogging, and propose a high heat exchange efficiency, anti-clogging Heat exchange device with the characteristics of clogging, anti-fouling, anti-corrosion and easy cleaning

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