High-efficiency tubular heat exchanger device based on surface modification and heat exchange system

Abstract

The invention relates to the field of efficient utilization of tail gas waste heat, and specifically discloses a high-efficiency tubular heat exchanger device based on surface modification. The devicecomprises a cylinder body, an oil drain wire net, an oil receiving device, a self-rotation turbulence inner component, a bearing, a self-rotation turbulence inner component fixing shaft and a self-rotation turbulence inner component lower supporting plate; an air inlet and the oil receiving device are arranged at the bottom end of the cylinder body, the oil drain wire net and the self-rotation turbulence inner component are arranged above the air inlet; an air outlet is formed in the upper end of the cylinder body; and oleophobic and hydrophobic layers are arranged on the inner wall of the cylinder body and the surface of the self-rotation turbulence inner component. According to the device, oil-containing coking substances in the air can be filtered through the oil drain wire net, the coking substances can be collected by the oil receiving device, so that the part, entering the cylinder body to be adhered, of the oil-containing coking substances are reduced; the self-rotation turbulence inner component, under drive of air flows, carries out self-rotation to increase the disturbance of fluids, to improve the flushing effect of the air on a heat exchange surface, so that the scaleis effectively inhibited, and the heat exchange efficiency is improved; and the oleophobic and hydrophobic layers can prevent the oil-containing coking substances from being adhered, and the heat exchange efficiency is continuously improved.

Description

technical field [0001] The invention relates to the field of high-efficiency utilization of tail gas waste heat, in particular to a high-efficiency tubular heat exchanger device and a heat exchange system based on surface modification. Background technique [0002] Coal is currently the most important primary energy in China and occupies an important position in my country's energy structure. After more than 20 years of development, coal in many areas of China has basically realized clean transformation and utilization, and coal chemical industry has also made great progress. Today, coal is widely used in electricity, heating and other fields. [0003] Medium and low temperature dry distillation technology is known as the "leader" of coal classification and utilization, and low temperature dry distillation to produce high-quality coal is a more commonly used process. Among them, the calorific value of gas can reach 33.5-37.7MJ / m3. In actual production, the heat in the tai...

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Problems solved by technology

[0004] However, due to the complexity of the coal structure, especially the scaling of tar vapor and coal dust in the coal gas generated during the pyrolysis process of coal has always been the key factor hindering the recovery of residual heat. The oil scale adheres to the heat transfer surface, making the heat transfer The coefficient drops significantly, and heat recovery is difficult to carry out effectively for a long time

Although the static internal components used above can better realize the heat transfer process enhancement, due to the large increase in resistance, they are not suitable for the waste heat recovery process of exhaust gas with strict pressure drop requirements.

Moreover, the inner surface of the traditional tubular heat exchanger is very easy to be adhered by coke, and the heat transfer efficiency of the heat exchanger with coke adhesion is greatly reduced.

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