Shell-and-tube heat exchanger suitable for three-fluid heat exchange

Abstract

The invention discloses a shell-and-tube heat exchanger suitable for three-fluid heat exchange. The shell-and-tube heat exchanger suitable for three-fluid heat exchange comprises a shell, a first sealing head, a second sealing head, a first fluid heat exchange assembly, a second fluid heat exchange assembly and a third fluid heat exchange assembly, wherein the shell is isolated through a vertically-arranged third tube plate to form a first inner cavity and a second inner cavity; the first sealing head is arranged at one end of the shell, and a first tube box is formed in the first sealing head; the second sealing head is arranged at the other end of the shell, and a second tube box is formed in the second sealing head; the first fluid heat exchange assembly is arranged in the first inner cavity, and comprises a third tube box, a first heat exchange tube communicating the third tube box with the first tube box, a fourth tube box, and a second heat exchange tube communicating the fourth tube box with the first tube box, and a first fluid flows to exchange heat in the first heat exchange tube and the second heat exchange tube; the second fluid heat exchange assembly comprises concentric tubes arranged in the shell and communicating with the second tube box and the second inner cavity respectively, and a second fluid flows to exchange heat in the concentric tubes; and in the third fluid heat exchange assembly, a third fluid flows to exchange heat in the first inner cavity of the shell. The shell-and-tube heat exchanger suitable for three-fluid heat exchange, which is disclosed by the invention, is reasonable in structural design; and the shell-pass fluid can exchange heat with the two tube-pass fluids simultaneously, thus a multi-fluid heat exchange need is met, and the heat exchange efficiency is high.

Description

technical field [0001] The invention relates to a shell-and-tube heat exchanger, specifically a shell-and-tube heat exchanger suitable for simultaneous heat exchange of three fluids, and belongs to the technical field of heat exchange. Background technique [0002] The shell-and-tube heat exchanger used in the prior art is only suitable for the heat exchange of two fluids, one fluid flows in the tube side, and the other fluid flows in the shell side, which cannot adapt to multi-fluid working conditions. [0003] At present, there are few studies on multi-fluid heat exchangers, and the designed multi-fluid heat exchangers are often large in size, complex in structure, difficult to manufacture, and high in cost. [0004] For example, Chinese invention patent 201310531767.2 discloses a core-pulling heat exchanger, which is provided with a spiral branch pipe connected to the feed core pipe on the periphery of the feed core pipe. The spiral branch pipes are closely arranged in a ...

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Problems solved by technology

However, when four fluid inlets and outlets are required on the same side of the heat exchanger, it is difficult to manufacture the concentrically arranged core tubes. Low

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