Square shell and tube heat exchanger with waved tube

Abstract

The invention provides a square shell and tube heat exchanger with a waved tube. The shell and tube heat exchanger comprises a square drum, a heat exchange tube and a tube plate, wherein the tube plate comprises an upper tube plate body and a lower tube plate body, the upper tube plate body, the lower tube plate body and the square drum form airtight space, the heat exchange tube is arranged in the air tight space, an airtight upper head is arranged on the left side of the upper tube plate body and provided with a tube pass fluid outlet, an airtight lower head is arranged on the right side of the lower tube plate body and provided with a tube pass fluid inlet, the upper and lower tube plate bodies are provided with holes, two ends of the heat exchange tube are fixed by holes of the upper and lower tube plate bodies respectively and communicated with the upper and lower heads respectively, a shell pass fluid inlet is arranged on the right side of the upper tube plate body on the square drum, and a shell pass fluid outlet is arranged on the left side of the lower tube plate body on the square drum. According to the shell and tube heat exchanger, the heat exchange performance is enhanced substantially, thermal stress generated during uneven heating of the tube can be absorbed through appropriate deformation, flow directions are continuously changed along with the waved structure of the tube wall, and scaling on the surface of the tube can be inhibited through the generated scouring action.

Description

technical field [0001] The invention relates to a heat exchanger in the technical field of heat transfer and enhanced heat exchange. Background technique [0002] The shell-and-tube heat exchanger is a heat exchanger that connects a certain number of heat transfer tubes to the tube sheet, arranges the heat transfer tube bundles in parallel, and then connects the shell and the tube sheet externally. At present, the shell and tube heat exchanger has the largest application range in the industry and the highest frequency of use. [0003] The core component of the shell-and-tube heat exchanger is the heat transfer tube, and its heat transfer capacity directly determines the performance of the heat exchanger. With the continuous deepening of the research on enhanced heat exchange technology, people have developed many enhanced heat exchange elements, and the wave tube is one of them. The corrugated tube uses a curved structure that changes positively and negatively along the ax...

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Problems solved by technology

[0004] At present, the research on wave tube heat exchangers at home and abroad has not been fully carried out, and there are few related patents on wave tube heat exchangers. There are only two invention patents: the wave tube heat exchanger proposed by the patent No. 94225614.X A rough schematic diagram is given, and several parallel wavy lines are drawn in the heat exchanger cylinder to represent the heat exchange tubes, and the structure of the wave tubes, their specific arrangement in the cylinder, and the relationship between the baffles and the baffles are not pointed out. The matching method, so its design cannot meet the technical requirements of the actual production and use of the heat exchanger; the patent No. 200610165381.4 uses a wave-shaped spiral groove heat exchange tube as the heat exchange element of the heat exchanger, and provides several heat exchange The three-dimensional schematic diagram of the water-water heat exchanger, but its structure cannot meet the design requirements of the water-water heat exchanger, and the wave-shaped spiral groove heat exchange tube is difficult to manufacture and difficult to withstand high pressure, so its application is limited to those with low pressure car exhaust cooling system

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