Tandem structure of integrated shell-and-tube heat exchanger

Abstract

The utility model discloses a series connection structure of an integrated shell-and-tube heat exchanger, which solves the problems of improving the heat exchange efficiency and saving the installation space. The lower end of the upper tube box (1) is connected with an upper tube pass (3), and the upper end of the lower tube box (2) is connected with a lower tube pass (4); an upper tube pass inner tube plate (5) is arranged in the upper tube pass (3), an upper tube pass inner heat exchange tube (7) is connected to the upper tube pass inner tube plate (5), a lower tube pass inner tube plate (6) is arranged in the lower tube pass (4), and a lower tube pass inner heat exchange tube (8) is connected to the lower tube pass inner tube plate (6). A lower sealing ring (9) is arranged on the lower bottom face of the upper tube pass inner tube plate (5), an upper sealing ring (10) is arranged on the top end face of the lower tube pass inner tube plate (6), and a sealing cavity (11) is formed after the lower sealing ring (9) and the upper sealing ring (10) are in butt joint. The purposes of saving the installation space of the shell-and-tube heat exchanger and improving the heat exchange efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to a shell and tube heat exchanger, in particular to a series structure of an integrated shell and tube heat exchanger. Background Art

[0002] Shell and tube heat exchanger is the most common type of heat exchanger in chemical equipment. In chemical production, sometimes in order to improve the heat exchange efficiency, two shell and tube heat exchangers are often used in series. A general shell and tube heat exchanger is composed of an upper tube box, a shell side, and a lower tube box connected in series in sequence. The medium in the tube first enters the closed shell of the upper tube box, and then enters the heat exchange tube in the shell side, and exchanges heat with the medium outside the heat exchange tube in the shell side. The exchanged medium passes through the series pipeline and then enters the closed shell of the lower tube box, and is finally discharged to the downstream equipment. When one shell and tube heat exchanger cannot meet the heat exchange requirements, two shell and tube heat exchangers need to be connected in series to achieve secondary heat exchange of the medium in the tube. However, how to save series space and effectively combine the two-stage shell and tube heat exchangers together to improve the heat exchange efficiency and save installation space has become a problem that needs to be solved on site. Summary of the invention

[0003] The utility model provides an integrated series structure of shell and tube heat exchangers, which solves the technical problem of how to improve the heat exchange efficiency and save the installation space.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] An integrated series structure of a shell and tube heat exchanger comprises an upper tube box and a lower tube box, wherein an upper tube pass is connected to the lower end of the upper tube box, and a lower tube pass is connected to the upper end of the lower tube box; an upper tube pass inner tube sheet is arranged in the upper tube pass, and an upper tube pass inner heat exchange tube is connected to the upper tube pass inner tube sheet; a lower tube pass inner tube sheet is arranged in the lower tube pass, and a lower tube pass inner heat exchange tube is connected to the lower tube pass inner tube sheet; a lower sealing ring is arranged on the lower bottom surface of the upper tube pass inner tube sheet, and an upper sealing ring is arranged on the top end surface of the lower tube pass inner tube sheet, a sealing cavity is formed after the lower sealing ring is butted against the upper sealing ring, a lower port of the upper tube pass heat exchange tube is communicated with the sealing cavity, and an upper port of the lower tube pass heat exchange tube is communicated with the sealing cavity.

[0006] Two tube pass series connection bolts are arranged between the upper tube pass inner tube plate and the lower tube pass inner tube plate; and a sealing gasket is arranged on the butt joint surface of the lower sealing ring and the upper sealing ring.

[0007] The utility model eliminates the lower tube box of the upper shell and tube heat exchanger and the upper tube box of the lower shell and tube heat exchanger, and directly connects the tube path of the upper shell and tube heat exchanger with the tube path of the lower shell and tube heat exchanger in series, thereby achieving the purpose of saving the installation space of the shell and tube heat exchanger and improving the heat exchange efficiency; the investment cost is low, the assembly is convenient, and the heat exchange medium is guaranteed to flow smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the utility model;

[0009] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle. Implementation

[0010] The utility model is described in detail below with reference to the accompanying drawings:

[0011] An integrated shell-and-tube heat exchanger series structure includes an upper tube box 1 and a lower tube box 2, wherein an upper tube pass 3 is connected to the lower end of the upper tube box 1, and a lower tube pass 4 is connected to the upper end of the lower tube box 2; an upper tube pass inner tube sheet 5 is arranged in the upper tube pass 3, and an upper tube pass inner heat exchange tube 7 is connected to the upper tube pass inner tube sheet 5; a lower tube pass inner tube sheet 6 is arranged in the lower tube pass 4, and a lower tube pass inner heat exchange tube 8 is connected to the lower tube pass inner tube sheet 6; a lower sealing ring 9 is arranged on the lower bottom surface of the upper tube pass inner tube sheet 5, and an upper sealing ring 10 is arranged on the top surface of the lower tube pass inner tube sheet 6 , a sealed cavity 11 is formed after the lower sealing ring 9 is butted with the upper sealing ring 10, the lower port of the heat exchange tube 7 in the upper tube pass is connected with the sealed cavity 11, and the upper port of the heat exchange tube 8 in the lower tube pass is connected with the sealed cavity 11; the utility model is to dismantle the lower tube box of the upper shell and tube heat exchanger, and then dismantle the upper tube box of the lower shell and tube heat exchanger, and then butt the tubes of the two shell and tube heat exchangers together to form a shell and tube heat exchanger connected in series; and the connection of the heat exchange tubes in the two tube passes is completed through the sealed cavity 11 formed by the two sealing rings at the butt joint.

[0012] Two-pass series connection bolts 13 are arranged between the upper-pass inner tube sheet 5 and the lower-pass inner tube sheet 6; a sealing gasket 12 is arranged on the butt surface of the lower sealing ring 9 and the upper sealing ring 10; the lower sealing ring 9 can be formed by surfacing welding on the lower bottom surface of the upper-pass inner tube sheet 5, and an annular boss is surfacing welded on the lower bottom surface of the surfacing lower sealing ring 9; the upper sealing ring 10 is formed by surfacing welding on the top end surface of the lower-pass inner tube sheet 6, and an annular groove is formed on the top end surface of the upper sealing ring 10, and a sealing gasket 12 is arranged between the annular boss and the annular groove to ensure the tightness of the sealing cavity 11, so that the medium flowing from the upper-pass inner heat exchange tube 7 to the sealing cavity 11 can smoothly enter the lower-pass inner heat exchange tube 8 to continue heat exchange.

Claims

1. An integrated shell and tube heat exchanger series structure, comprising an upper tube box (1) and a lower tube box (2), characterized in that: The upper tube side (3) is connected to the lower end of the upper tube box (1), and the lower tube side (4) is connected to the upper end of the lower tube box (2); an upper tube side inner tube sheet (5) is arranged in the upper tube side (3), and an upper tube side inner heat exchange tube (7) is connected to the upper tube side inner tube sheet (5); a lower tube side inner tube sheet (6) is arranged in the lower tube side (4), and a lower tube side inner heat exchange tube (8) is connected to the lower tube side inner tube sheet (6); a lower sealing ring (9) is arranged on the lower bottom surface of the upper tube side inner tube sheet (5), and an upper sealing ring (10) is arranged on the top surface of the lower tube side inner tube sheet (6); the lower sealing ring (9) and the upper sealing ring (10) are butt-jointed to form a sealing cavity (11); the lower end of the upper tube side inner heat exchange tube (7) is connected to the sealing cavity (11), and the upper end of the lower tube side inner heat exchange tube (8) is connected to the sealing cavity (11).

2. The series structure of an integrated shell and tube heat exchanger according to claim 1, characterized in that: Two-pass series connection bolts (13) are provided between the upper-pass inner tube sheet (5) and the lower-pass inner tube sheet (6); and a sealing gasket (12) is provided on the butt joint surface between the lower sealing ring (9) and the upper sealing ring (10).

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