Hairpin type double-tube-plate heat exchanger and method for assembling heat exchanging tube and shell body thereof

Abstract

The invention relates to a hairpin type double-tube-plate heat exchanger and a method for assembling a heat exchanging tube and a shell body thereof. The hairpin type double-tube-plate heat exchanger comprises the U-shaped heat exchanging tube, the shell body and tube plates, wherein the shell body is U-shaped, the U-shaped shell body is composed of an A section, a B section and a C section, the A section and the B section constitute the two arms of the U-shaped shell body, and the C section constitutes the bent section in the middle of the U-shaped shell body; the tube plates include a first front tube plate, a first rear tube plate, a second front tube plate and a second rear tube plate, a first isolation cavity is arranged between the first front tube plate and the first rear tube plate, and a second isolation cavity is arranged between the second front tube plate and the second rear tube plate; the U-shaped heat exchanging tube is embedded in the U-shaped shell body, and the two arms of the U-shaped heat exchanging tube are positioned on the first front tube plate and the second front tube plate respectively. According to the heat exchanger obtained with the method for assembling the heat exchanging tube and the shell body, the heat exchanging area between pipe side media and shell side media is increased in limited equipment space, and leakage of exchanging media at the positions of the tube plates is avoided.

Description

technical field [0001] The invention relates to a heat exchanger and an assembling method thereof, in particular to a double-tube plate heat exchanger with a U-shaped shell of the heat exchanger and an assembling method of the heat exchange tube and the shell. Background technique [0002] The heat transfer tube bundle of the U-shaped tube heat exchanger is U-shaped, and the two ends of the tube bundle are fixed on the upper and lower parts of the same tube sheet, and then divided into two inlet and outlet by the partition in the tube box Part, the tube sheet is clamped between the flange of the tube box and the flange of the shell, and is connected by bolts. Since the U-shaped end of the tube bundle is not fixed, it can be freely stretched, which completely eliminates the influence of thermal stress on the tube bundle, and is suitable for occasions where the temperature difference between the two fluids is large. But in practice, the heat exchanger must first be fixed by t...

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Problems solved by technology

[0003] In addition, since the ordinary U-shaped tube heat exchanger has only one tube sheet, the medium in the shell cavity of the heat exchanger is easy to leak into the tube cavity at the connection between the U-shaped tube and the tube sheet, and this mixed medium enters the other The equipment will cause damage to other equipment. Some media are high-pressure and toxic fluids. Once leaked, they will pollute the environment and even cause fatal injuries to personnel.

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