A kind of pulsating flow shell-and-tube heat exchanger and its heat exchanging method

Abstract

The invention relates to a pulsating flow shell-and-tube heat exchanger and a heat exchange method thereof. The heat exchanger comprises multiple heat exchange pipes, a pulsating flow generation system, a shell, pipe plates at the two ends of the shell, end covers connected with the pipe plates, and multiple baffle plates in the shell, wherein the heat exchange pipes have periodically circular inner rib structures; all ring ribs are arranged in parallel, and are perpendicular to the axis; and the pulsating flow generation system converts a heat exchange working medium, flowing through the right end cover part of the shell-and-tube heat exchanger, from a constant flow state to a pulsating flow state having average velocity. As a pulsating flow is combined with the round pipes having the periodical inner ring rib structures, when a fluid at the tube pass side of the heat exchanger is in low average Reynolds number, a constant flow is converted to a longitudinal waveform pulsating flow having a certain frequency and amplitude, periodical vortexes can be formed in the heat exchange pipes having the inner ring rib structures, and the heat exchange efficiency and the scaling prevention capacity of the fluid at the tube pass side are improved.

Description

technical field [0001] The invention relates to the technical field of heat exchange, in particular to a pulsating flow shell-and-tube type pulsating flow heat exchanger and a heat exchanging method thereof. Background technique [0002] With the increasingly tense global energy situation and the decrease of conventional energy sources, people pay more and more attention to energy saving and consumption reduction. Shell heat exchangers are widely used in petrochemical, electric power, environmental protection, energy and other industrial fields. The main function is to adjust the temperature of the process medium in industrial production to meet the process requirements and recover waste heat to achieve energy saving and consumption reduction. Therefore, optimizing the design or improving the structure of the shell heat exchanger to improve its heat transfer performance and reduce its power consumption is related to production efficiency and energy saving. [0003] In addit...

AI Technical Summary

Problems solved by technology

The existing shell-and-tube heat exchanger consumes too much pump work, and the heat transfer effect on the tube side is not good, which cannot meet the heat exchange demand and fail to achieve the purpose of energy saving and consumption reduction

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