Spiral traverse baffle shell type heat exchanger design method

Abstract

The invention relates to a design method for a screw deflector shell and tube exchanger. Firstly, the method for computing the pressure drop on the shell side of the screw deflector shell and tube exchanger and a coefficient of heat transfer can be obtained after the correlation of the drag produced from the sweep of hypothetical pipe columns by fluid and heat exchange is adjusted by referring tothe adjustment factors relevant to geometric structure parameters of the screw deflector shell and tube exchanger. Subsequently, a method for designing the process and geometric parameters of the screw deflector shell and tube exchanger according to the known thermal parameters is proposed by adopting the Bell-Delawre design method which is widely used for designing a segmental baffle shell and tube exchanger based on the computing method. According to the design method provided by the invention, a heat exchange meeting the given heat load specification is designed more accurately and efficiently; the design efficiency and the accuracy are high; the performance of the designed heat exchanger is closer to the performance required by the design specification; the raw materials and the cost wastage are significantly reduced.

Description

Design method of a shell-and-tube heat exchanger with spiral baffles technical field The invention relates to a design method of a heat exchanger, in particular to a design method of a shell-and-tube heat exchanger with spiral baffles. Background technique Shell and tube heat exchanger is an important equipment in oil refining, chemical industry, environmental protection, energy, electric power and other industries. Among them, the bow-shaped baffle shell-and-tube heat exchanger has the longest history. Although the bow-shaped baffle shell-and-tube heat exchanger is the most widely used shell-and-tube heat exchanger in the heat exchanger industry, due to its structural characteristics, there is a large pressure drop along the process; it is prone to flow dead zones; Fouling and easy to induce vibration of heat exchange tubes and other shortcomings, researchers have been improving its structure for a long time, but they have not been able to break away from its basic struc...

AI Technical Summary

Problems solved by technology

But then the American ABB company bought out its related research results, and only very limited information was given in the published literature for the detailed performance analysis and design methods of the heat exchanger.

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