Rectangular fully welded U-shaped tube type heating network heater

Abstract

The invention discloses a rectangular fully welded U-shaped tube type heating network heater, which belongs to heat transfer equipment, particularly to steam-water heat transfer equipment using U-shaped heat transfer tubes. The rectangular fully welded U-shaped tube type heating network heater comprises a heat transfer tube bundle formed by the U-shaped heat transfer tubes and mounted in a casing, and a tube box provided with a secondary heat medium inlet and a secondary heat medium outlet and mounted at one end of the casing, wherein the heat transfer tube bundle is formed by a rectangular tube plate, the U-shaped heat transfer tubes and rectangular support plates; the U-shaped heat transfer tubes sequentially penetrate at least two rectangular support plates and the rectangular tube plate and are in welding connection and expanded joint with the two types of plates; a semi-circular steam ingoing collection box with a steam inlet is welded above parallel side plates A and B of the casing, and a semi-circular water outgoing collection box with an outgoing water outlet is welded below the side plates A and B; the semicircular cylinder-shaped tube box with the secondary heat medium inlet and the secondary heat medium outlet is welded to the end of the casing, at which the rectangular tube plate is welded. Compared with the conventional U-shaped tube type heat transfer equipment, the fully welded structure is more reliable in sealing, stronger in temperature resistance and pressure resistance, and simpler in structure.

Description

technical field [0001] The invention belongs to heat exchange equipment, in particular to steam-water heat exchange equipment using U-shaped heat exchange tubes. Background technique [0002] The traditional U-shaped tube heating network heater has a structural form: a circular shell and a circular tube plate, and the heat exchange tube is a U-shaped tube. The two ports of the heat exchange tube are connected to the tube plate at one end, and the circular shell The side cylinder is welded with the circular tube sheet. Its biggest advantage is that there is no temperature difference stress on the shell side. The disadvantage is that the steam circulation space of the shell is small, it is difficult to replace the tube and repair the defect, and it is not easy to dredge the blockage of the heat exchange tube. In the traditional U-shaped tube heating network heater, tube bundle leaks and broken tubes often occur during operation, which affects normal heating. Therefore, the ...

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