Double-pipe heat interchanger suitable for sewage with high solid content

Abstract

The invention discloses a double-pipe heat interchanger suitable for sewage with the high solid content. The double-pipe heat interchanger comprises an inner casing pipe used as a sewage channel, and an outer casing pipe providing a heat exchange medium channel. The inner casing pipe is located in the outer casing pipe. The section of the inner casing pipe is triangular, and the inner casing pipe is a triangular twisted pipe formed by spiraling and deforming the pipe wall in the pipe center axial direction. The double-pipe heat interchanger is suitable for sewage with the high solid content, dirt impurities in the sewage are not prone to scaling on the four walls of the sewage channel or blockage, and the heat exchange efficiency and continuous and stable operation of the heat interchanger are ensured; and the pipe pass and shell pass convective heat transfer efficiency of the heat interchanger is quite high, so that the heat interchanger has high heat transfer enhancement performance, and the power consumption of a process pump is small.

Description

technical field [0001] The invention belongs to the field of heat exchange equipment, and in particular relates to a heat exchange equipment suitable for sewage with high solid particle content. Background technique [0002] The effective treatment of biomass, organic solid waste and domestic sewage can effectively solve the dual crises of energy and environment that our country is currently facing. At present, sewage and sewage treatment projects or process processes, such as large-scale farm biogas projects, municipal sewage fermentation treatment projects, cassava fermentation alcohol engineering wastewater degradation processes, etc., can all achieve the output of an important energy gas - methane, and at the same time To degrade organic matter to reduce air, soil and water pollution. These projects or engineering supporting processes all require heating or temperature control of raw materials, discharge and reaction process. Temperature is the key factor to ensure the ...

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Problems solved by technology

However, since there is almost no turbulence in the flat or spiral plate, the enhancement of the heat transfer process cannot be realized. Compared with the circular tube with enhanced heat transfer structure, the convective heat transfer efficiency is low, and a larger heat transfer area is often required.

[0006] On the other hand, the current main twisted structure heat exchange tube is an elliptical twisted tube. Although it has certain advantages in enhancing heat transfer performance, its application objects are limited to single-phase fluids without solid particles, such as sulfuric acid cooling, ammonia preheating, etc. Heat, lubricating oil cooling, etc., there is no research and related patents suitable for sewage

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