Coating method and device for solid medium layer inside coke oven ascension pipe crude gas waste heat recovery heat exchanger

Abstract

The invention provides a coating method for a solid medium layer inside a coke oven ascension pipe crude gas waste heat recovery heat exchanger. The coating method comprises the following steps that solid powder with a high heat-conducting property is mixed with anti-high-temperature glue to obtain a wet material; the inner side wall of an outer barrel layer is filled with a flexible heat preservation layer; an inner barrel layer is installed on a lower flange and externally provided with a heat exchange coil pipe, the heat exchange coil pipe is sleeved with the outer barrel layer of which the inner wall is filled with the flexible heat preservation layer, and the outer barrel layer is connected with an upper flange; the wet material is sprayed into a space between the outer barrel layer and the inner barrel layer; and moisture in the wet material is discharged from the gap between a working medium outlet pipe and the outer barrel layer through hot water injected into the heat exchange coil pipe. The coating method is simple in technology and low in cost, on the one hand, the heat exchange efficiency and coating quality of the solid medium layer are ensured by selecting the specific solid powder and the specific glue, on the other hand, through natural vibration of an ejection pipe of a pressure machine and drying of inherent components inside the coke oven ascension pipe crude gas waste heat recovery heat exchanger, the coating cost is greatly reduced, and the coating quality is ensured.

Description

technical field [0001] The invention belongs to the field of electric equipment, and in particular relates to a coating method for a solid medium layer in a coke oven riser pipe waste gas waste heat recovery heat exchanger. Background technique [0002] The coke oven can perform high-temperature dry distillation on coal and efficiently convert it into coke, coke oven gas, coal tar, crude benzene and other products. It is an efficient energy conversion kiln. In coke oven expenditure heat, 650°C-700°C raw coal gas takes up about 36% of the heat, which has a very high recycling value. [0003] The structure of the coke oven ascending pipe raw gas waste heat recovery heat recovery device is generally divided into three basic structures: inner, middle and outer. The inner layer is a cylinder made of alloy steel with high temperature resistance and corrosion resistance, and the raw gas flows through the cylinder from bottom to top. The middle is the core heat transfer layer. A h...

AI Technical Summary

Problems solved by technology

Usually, the coating of the solid medium layer is formed by direct filling between the inner and outer layers. The coating is uneven and the quality is unstable, which leads to the poor quality of the riser heat extraction device, and it is difficult to guarantee the service life and heat transfer efficiency.

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