Drainage and drag reduction device in the guide tube, guide tube and shell-and-tube heat exchanger

Abstract

The invention relates to the technical field of tube-shell-type heat exchangers, in particular to a flow guiding and resistance-reducing device in a flow guiding barrel, the flow guiding barrel and a tube-shell-type heat exchanger, wherein the flow guiding and resistance reducing device is arranged along the axial direction of the inner shell of the flow guiding barrel; the flow guiding and resistance reducing device is of a closed structure spliced by two arc-shaped plates and two side plates; the upper ends of the two arc-shaped plates are connected; the lower ends of the two arc-shaped plates are separately fixed on the inner shell of the flow guiding barrel; the two opposite side ends of the two arc-shaped plates are separately fixedly connected with the corresponding side plate; and the arc-shaped surfaces of the two arc-shaped plates are both bent toward the inner sides. Compared with the prior art, the flow guiding and resistance-reducing device is advantaged in that the retention area of fluid in the flow guiding barrel is eliminated; the flowing resistance is reduced; and the energy-saving effect is good; the flow guiding and resistance-reducing device has the advantages of being simple in structure and convenient for manufacture; and the flow guiding and resistance-reducing device can be widely applied to heat exchangers in the oil industry, the chemistry industry, the electricity industry and the like.

Description

technical field [0001] The invention relates to the technical field of shell-and-tube heat exchangers, in particular to a drainage and drag reduction device in a draft tube, a draft tube and a shell-and-tube heat exchanger. Background technique [0002] At present, in my country's petrochemical and other industries, heat exchange equipment accounts for more than 30% of equipment investment. Among heat exchange equipment, shell and tube heat exchangers are used the most. Therefore, improving the efficiency of heat exchangers is beneficial to energy saving in the chemical industry. Emission reduction and efficiency improvement are very important. [0003] The traditional shell-and-tube heat exchanger adopts a smooth circular tube and a single-bow baffle support structure. The fluid flows perpendicular to the axial direction of the tube on the shell side, and there is a large flow and heat transfer in the front and rear areas of the baffle. The dead zone reduces the overall hea...

AI Technical Summary

Problems solved by technology

However, due to the unreasonable structural design of the existing guide tube, the guide tube blocks the fluid, so that a fluid stagnation area is formed in the guide tube, and the fluid resistance is relatively large

On the other hand, due to the complex structure of the guide tube, the processing is difficult, the equipment cost is high, and the pressure bearing capacity of the shell side of the heat exchanger is reduced

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