High-efficiency heat exchange equipment based on Dean Vortice effect

Abstract

The invention discloses high-efficiency heat exchange equipment based on a Dean Vortice effect. The high-efficiency heat exchange equipment sequentially comprises a shell, a cooling medium inlet, a cooling medium outlet, a process medium outlet, a process medium inlet, a spiral heat exchange tube and the like. When a fluid medium flows in the spiral heat exchange tube, a Dean Vortice with symmetric vortex cores distributed can be formed to make an important influence on fluid heat exchange; and the intensity and the heat exchange efficiency of the Dean Vortice are analyzed and evaluated so asto select a Dean Vortice intensity index corresponding to the optimal heat exchange efficiency, and the structure parameters of the heat exchange tube are optimally designed, so that when the fluid medium flows in a tube pass, the fluid medium reaches a sufficient turbulence state under the condition of relatively low resistance and on-way loss, the thickness of a flow boundary layer and a temperature boundary layer near the pipe wall is effectively reduced, the active convection heat exchange process in the medium flowing process is enhanced, the overall operation efficiency of the equipmentis improved, meanwhile, formed scale and impurity deposition near the pipe wall is damaged, and it is guaranteed that the equipment operates in a high-efficiency, economical, safe and long-term mode.

Description

technical field [0001] The present invention relates to the technical field of active enhanced heat transfer in the fluid flow process, and more specifically relates to a high-efficiency spiral heat exchange device based on the DeanVortice secondary flow active enhanced heat transfer effect, which can be widely used in petroleum, chemical, light industry , sewage treatment and other fields of fluid heat transfer process. Background technique [0002] Heat exchange equipment is a general process unit for heat exchange. It is widely used in chemical industry, oil refining, power, light industry, metallurgy, nuclear energy, shipbuilding, aviation, construction and other industrial sectors. Its metal consumption, power consumption and construction investment are in the whole project occupy a considerable share. Therefore, the operating performance and work efficiency of heat exchange equipment directly affect the stable operation and economic benefits of the entire device and e...

AI Technical Summary

Problems solved by technology

However, simply increasing the medium flow rate will lead to an increase in flow resistance and a sharp increase in equipment energy consumption

Enlarging the heat transfer area is one of the important ways to enhance the performance of shell-and-tube heat exchange equipment. The heat transfer area is increased by using small-diameter heat exchange tubes and expanding the surface heat transfer surface, but this method often results in equipment volume, technical The subsequent increase in facilities and investment restricts its wide application in chemical systems with fixed sites

Increasing the average heat transfer temperature difference is also an effective method to enhance the heat transfer performance of heat exchange equipment. It mainly uses different heat transfer surface layouts to change the average heat transfer temperature difference, or expands the temperature difference between the inlet and outlet of cold and hot fluids to increase the average heat transfer. temperature difference, but this method is usually limited by the production process and economic conditions in the implementation process, and the effect is limited

In addition, in industrial applications, components such as swirl slices and spiral ties are often inserted into the pipe to make it fully develop into turbulent flow. It can enhance the operating efficiency of heat exchange equipment to a certain extent, but usually results in higher flow resistance and operating costs

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