Duplex overlapped tubular heat exchanger

Abstract

The utility model discloses a duplex overlapped tubular heat exchanger which comprises a first heat exchanger, a second heat exchanger and two three-way valves arranged between the two heat exchangers, wherein the first heat exchanger and the second heat exchanger are stacked up and down. Single-shell-side or multi-shell-side heat exchangers are stacked, so that the placement space of standby heat exchangers is reduced, pipelines are simplified, the function of rapidly replacing the heat exchangers on line is achieved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically a double-overlapping tube heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers are a common type of indirect heat exchanger, widely used in chemical, petroleum, and pharmaceutical industries. The main working principle of a shell-and-tube heat exchanger is based on heat conduction and convection. It consists of a shell, heat transfer tube bundles, tube sheets, baffles, and tube boxes. During heat exchange, the hot and cold fluids flow inside the tubes (tube side) and outside the tubes (shell side), respectively. The hot fluid transfers heat to the cold fluid through the tube walls, thus achieving heat exchange.

[0003] Many systems using shell-and-tube heat exchangers cannot be shut down, as the losses from such shutdowns would be enormous. Therefore, backup heat exchangers are designed during the design phase. The original heat exchanger needs to be placed in a separate space, resulting in complex piping layouts. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems and provide a double-overlapping tubular heat exchanger that stacks single-shell or multi-shell heat exchangers to reduce the space required for spare heat exchangers, simplify piping, enable rapid online heat exchanger replacement, and improve production efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A double-overlapping tubular heat exchanger includes a first heat exchanger and a second heat exchanger stacked vertically, and two three-way valves disposed between the two heat exchangers.

[0007] Furthermore, the first heat exchanger and the second heat exchanger are connected by a bracket.

[0008] Furthermore, the three-way valve is provided in two parts.

[0009] Furthermore, the two three-way valves are arranged symmetrically on the left and right sides.

[0010] Furthermore, the second heat exchanger is provided with a mounting bracket, the mounting bracket is provided with a rotating shaft, the bracket is provided with a sliding rod that slides between them, the sliding rod is provided with a rack, the rotating shaft is provided with a gear that meshes with the rack, and the two ends of the sliding rod are respectively connected to the valve stems of corresponding three-way valves.

[0011] Furthermore, a handwheel is provided at the front end of the rotating shaft.

[0012] Furthermore, the three-way valve is symmetrically arranged front and rear.

[0013] Furthermore, both the first and second heat exchangers are provided with an inlet and an outlet for the liquid to be heated.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model includes a first heat exchanger and a second heat exchanger stacked vertically, and two three-way valves disposed between the two heat exchangers. Stacking single-shell or multi-shell heat exchangers reduces the space required for spare heat exchangers, simplifies piping, enables rapid online heat exchanger replacement, and improves production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of Embodiment 1 of the present utility model;

[0018] Figure 2 This is a schematic diagram of Embodiment 2 of the present invention;

[0019] Figure 3 This is a front view of Embodiment 2 of the present utility model.

[0020] In the diagram: 1. First heat exchanger; 2. Second heat exchanger; 3. Three-way valve; 4. Bracket; 5. Mounting bracket; 6. Slide rod; 7. Handwheel; 8. Inlet; 9. Outlet. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0022] Example 1:

[0023] like Figure 1 As shown, a double-overlapping tubular heat exchanger includes a first heat exchanger 1 and a second heat exchanger 2 stacked vertically, and two three-way valves 3 disposed between the two heat exchangers. Stacking single-shell or multi-shell heat exchangers reduces the space required for spare heat exchangers, simplifies piping, enables rapid online heat exchanger replacement, and improves production efficiency.

[0024] The first heat exchanger 1 and the second heat exchanger 2 are connected by a bracket 4.

[0025] The three-way valve 3 has two valves.

[0026] The two three-way valves 3 are symmetrically arranged on the left and right sides. The three-way valve 3 on the left side is connected to the inlet pipe, and the three-way valve 3 on the right side is connected to the outlet pipe. The shell-side medium enters from the three-way valve 3 on the left side. By rotating the valve stem or handwheel of the three-way valve, the shell-side medium flows to the second heat exchanger 2 and exits from the three-way valve 3 on the right side. When the second heat exchanger 2 malfunctions, the three-way valve stem or handwheel can be rotated to allow the shell-side medium to flow to the first heat exchanger 1, thus realizing the function of online heat exchanger replacement.

[0027] The second heat exchanger 2 is equipped with a mounting bracket 5, which has a rotating shaft. A sliding rod 6, which slides between the bracket 4 and the mounting bracket 5, is mounted on the bracket 5. The sliding rod 6 has a rack, and the rotating shaft has a gear that meshes with the rack. Both ends of the sliding rod 6 are connected to the valve stems of corresponding three-way valves 3. When the rotating shaft rotates, the sliding rod 6 moves left and right under the action of the rack and gear, thereby achieving synchronous adjustment of the passages of the two three-way valves 3.

[0028] A handwheel 7 is provided at the front end of the rotating shaft.

[0029] The first heat exchanger 1 and the second heat exchanger 2 are each provided with an inlet 8 and an outlet 9 for the liquid to be heated.

[0030] Example 2:

[0031] like Figure 2 and Figure 3 As shown, the three-way valve 3 is symmetrically arranged at the front and rear.

[0032] In the description of this utility model, it should be noted that the terms "left", "right", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A double-piped overlapped heat exchanger, characterized by, It includes a first heat exchanger (1) and a second heat exchanger (2) stacked on top of each other, and two three-way valves (3) disposed between the two heat exchangers.

2. A double-pipe heat exchanger of the overlapping type according to claim 1, characterized in that The first heat exchanger (1) and the second heat exchanger (2) are connected by a bracket (4).

3. A double-pipe heat exchanger of the overlapping type according to claim 1, characterized in that, The three-way valve (3) has two valves.

4. A double-pipe heat exchanger of the overlapping type according to claim 3, characterized in that The two three-way valves (3) are arranged symmetrically on the left and right.

5. A double-pipe heat exchanger of the overlapping type according to claim 4, characterized in that The second heat exchanger (2) is provided with a mounting bracket (5), the mounting bracket (5) is provided with a rotating shaft, the bracket (4) is provided with a sliding rod (6) that slides between them, the sliding rod (6) is provided with a rack, the rotating shaft is provided with a gear that cooperates with the rack, and the two ends of the sliding rod (6) are respectively connected to the valve stem of the corresponding three-way valve (3).

6. A double-pipe heat exchanger of the overlapping type according to claim 5, characterized in that A handwheel (7) is provided at the front end of the rotating shaft.

7. A double-overlapping tubular heat exchanger as described in claim 3, characterized in that, The three-way valve (3) is symmetrically arranged at the front and rear.

8. A double-overlapping tubular heat exchanger as described in claim 1, characterized in that, The first heat exchanger (1) and the second heat exchanger (2) are each provided with an inlet (8) and an outlet (9) for the liquid to be heated.

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