Double-flow mixed tube bundle shell and tube heat exchanger

Abstract

The invention discloses a double-flow mixed tube bundle shell and tube heat exchanger. The heat exchanger comprises a shell, a tube plate, a flange, an end socket, a cylindrical partition plate, spiral tubes, a spiral rib strip straight tube, a common straight tube, a shell pass inlet and outlet tube, a spiral tube pass inlet and outlet tube, a straight tube pass inlet and outlet pipe and a lug-type support and is characterized in that the spiral rib strip straight tube and the common straight tube form a self-supporting type straight tube bundle which is used for replacing a core tube of a traditional winding tube type heat exchanger; the two ends of the straight tube bundle are fixed to the tube plate in the manner that expanding is performed first and then welding is performed; the spiral tube is wound outside the straight tube bundle; the winding directions of every two adjacent layers of spiral tubes are opposite; the two ends of each spiral tube are fixed to the tube plate in the manner that expanding is performed first and then welding is performed; the end socket, the cylindrical partition plate and the flange form a tube box; one end of the cylindrical partition plate is welded to the inner side of the end socket; and the other end of the cylindrical partition plate is combined and sealed with a round groove in the tube plate, and the tube box is divided into two spaces which correspond to a straight tube pass and a spiral tube pass. According to the double-flow mixed tube bundle shell and tube heat exchanger, the heat exchanging area is increased, and the heat exchanging efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of shell-and-tube heat exchangers, in particular to a double-stream mixing tube-bundle shell-and-tube heat exchanger. Background technique [0002] The heat exchanger is one of the key equipment for adjusting the temperature of the process medium and recovering waste heat to achieve energy saving and consumption reduction. The tube-wound heat exchanger is a special shell-and-tube heat exchanger. Compared with the general shell-and-tube heat exchanger, the tube-wound heat exchanger has a large heat transfer coefficient, compact structure, small fouling tendency in the tube side, and easy operation. It is widely used in subcoolers and liquefiers (liquid oxygen, liquid ammonia) of large-scale air separation devices, and is also widely used in pharmaceuticals, food, petroleum, chemical industry, metallurgy, electric power, and textile. and HVAC fields. [0003] The existing coiled tube heat exchanger mainly in...

AI Technical Summary

Problems solved by technology

[0003] The existing coiled tube heat exchanger mainly includes parts such as shell, core tube and spiral tube bundle. The core tube is a closed cylinder with both ends welded and fixed to the tube sheet, and is located in the center of the heat exchanger to support the spiral tube. This structure causes the core tube part not to participate in heat exchange, which wastes the space of the heat exchanger, reduces the heat exchange area, makes the heat exchanger not compact enough, and the heat exchange efficiency needs to be improved.

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