Thermodynamic calculation method for continuous spiral baffle plate shell-and-tube heat exchanger

Abstract

The invention relates to a thermodynamic calculation method for a continuous spiral baffle plate shell-and-tube heat exchanger. Firstly, according to thermal parameters required by the design, the design of a single segmental baffle plate shell-and-tube heat exchanger is performed according to a design method of a traditional shell-and-tube heat exchanger, detailed geometry parameters of the single segmental baffle plate shell-and-tube heat exchanger are determined and meet requirements of working conditions, the heat exchanging area and the central tube diameter of the continuous spiral baffle plate shell-and-tube heat exchanger are determined under the conditions that the continuous spiral baffle plate shell-and-tube heat exchanger is the same as the obtained single segmental baffle plate shell-and-tube heat exchanger through the design in structural style, heat exchange tube diameter, heat exchanger tube arrangement mode and tube pass number, and then the baffle plate distance of the continuous spiral baffle plate shell-and-tube heat exchanger is determined according to a maximum flow velocity ratio. The calculation method can accurately and efficiently calculate the heat exchanger meeting requirements of a given thermal load task, the design efficiency and accuracy are high, the purpose of miniaturizing the heat exchanger can be achieved, and installation space and raw material are saved.

Description

technical field [0001] The invention belongs to the field of heat exchanger design, and in particular relates to a thermal calculation method of a continuous spiral baffle tube shell heat exchanger. Background technique [0002] Shell and tube heat exchanger is an important equipment in oil refining, chemical industry, environmental protection, energy, electric power, refrigeration and other industries. Among them, the one with the longest history is the single-bow baffle shell-and-tube heat exchanger. Although the single-bow baffle shell-and-tube heat exchanger belongs to the most widely used shell-and-tube heat exchanger in the heat exchanger industry, due to its structural characteristics, there are large pressure drops along the process, easy flow dead zones, and easy 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 s...

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Problems solved by technology

[0006] For the design of the continuous spiral baffle shell-and-tube heat exchanger, there is no published relevant literature at home and abroad, let alone relevant commercial software. The design, manufacture and popularization of heat exchangers bring great difficulties

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