Tubular heat exchanger

Abstract

The utility model provides a shell-and-tube heat exchanger. The shell-and-tube heat exchanger comprises a shell, end sockets installed at the two ends of the shell, tube plates seamlessly arranged at the two ends of an inner cavity of the shell, and a tube bundle arranged between the two tube plates in a penetrating mode. A shell pass inlet and a shell pass outlet are formed in the shell; a tube pass inlet and a tube pass outlet are respectively formed in the two sealing heads; the two stirring assemblies are located at the two ends of the shell correspondingly; the stirring assembly comprises a mounting plate and a stirring spiral plug-in; a plurality of open holes corresponding to tube holes in the tube plate are distributed in the mounting plate, and the mounting plate is detachably mounted on the side, facing the end socket, of the tube plate; the multiple stirring spiral inserting pieces are arranged in one-to-one correspondence with the open holes, one ends of the stirring spiral inserting pieces are connected with the side walls of the corresponding open holes, and the other ends of the stirring spiral inserting pieces extend into the heat exchange tubes of the tube bundle. The shell-and-tube heat exchanger is high in heat exchange efficiency, good in heat exchange effect and easy to clean and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange equipment, in particular to a shell and tube heat exchanger. Background Art

[0002] Shell-and-tube heat exchangers, also known as shell-and-tube heat exchangers, are one of the most commonly used heat exchange devices in industrial production and are widely used in the chemical, petroleum, pharmaceutical, food processing, power, refrigeration, and other industries. Their primary function is to transfer heat between two fluids of different temperatures, achieving heating or cooling. A typical shell-and-tube heat exchanger typically consists of a shell, headers on both sides of the shell, tubesheets at both ends of the shell, and a heat transfer tube bundle located between the two tubesheets. Heat exchange occurs through heat conduction, with one fluid flowing through the shell and another through the tubes. In order to optimize the heat transfer effect, the existing technology often uses shell-side baffles to extend the shell-side liquid flow distance and duration, so that the shell-side liquid can fully contact the side wall of the heat exchange tube bundle and exchange heat with the tube-side liquid, but this method has limited effect on optimizing the heat transfer effect; there are also improvements to the heat exchange tube structure, such as designing the heat exchange tube structure as a corrugated tube or setting a disturbance plate inside the tube to disturb the flow of the tube-side liquid. Although such structures can disturb the flow of the tube-side liquid to a certain extent and improve the heat transfer efficiency, the special shape of the heat exchange tube is difficult to process and the cost is high, and it is difficult to clean and maintain the bent joints after scaling. Utility Model Content

[0003] In view of this, in order to solve the above technical problems, the utility model proposes a shell and tube heat exchanger with simple structure, high heat exchange efficiency, good heat exchange effect, and easy cleaning and maintenance.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] A shell and tube heat exchanger comprises a shell, a head mounted on both ends of the shell, a tube sheet seamlessly arranged at both ends of the inner cavity of the shell, and a tube bundle arranged between the two tube sheets; the shell is provided with a shell-side inlet and a shell-side outlet; the two heads are respectively provided with a tube-side inlet and a tube-side outlet; it also includes a stirring assembly, two of which are respectively located at both ends of the shell; the stirring assembly comprises a mounting plate and a stirring spiral plug-in; a plurality of openings corresponding to the tube holes on the tube sheet are distributed on the mounting plate, and the mounting plate is detachably mounted on the side of the tube sheet facing the head; there are a plurality of stirring spiral plug-ins, which are arranged in a one-to-one correspondence with each of the openings, one end of the stirring spiral plug-in is connected to the side wall of the opening corresponding to it, and the other end extends into the heat exchange tube of the tube bundle.

[0006] The stirring assembly is installed on the tube sheet through the mounting plate, and each stirring spiral plug-in is correspondingly inserted into each heat exchange tube of the heat exchange tube bundle; the two stirring assemblies are correspondingly arranged on both sides of the shell, that is, they are arranged at the inlet and outlet of the tube side, so that the inlet section and outlet section of each heat exchange tube are inserted with a stirring spiral plug-in, and the liquid entering the tube side is stirred by the stirring spiral plug-in to form turbulence, which effectively improves the heat exchange efficiency and heat exchange effect; at the same time, since the stirring assembly and the heat exchange tube are not an integrated structure but a split structure, the heat exchange tube is a universal long tube structure with low manufacturing and processing costs, and the split structure is detachable. For later cleaning and maintenance, only the stirring assembly needs to be removed, which is convenient and quick.

[0007] Furthermore, a mounting bolt is provided on a side of the tube sheet facing the head near the edge; a matching socket is provided on the mounting plate at a position corresponding to the mounting bolt, the mounting bolt is inserted into the socket and locked by a locking nut, so that the mounting plate is detachably fixed to the tube sheet.

[0008] The mounting plate and the tube plate are fixed by inserting mounting bolts into the sockets and then tightening them with lock nuts. The structure is simple and the assembly and disassembly are convenient.

[0009] Furthermore, the stirring spiral plug-in includes a connecting ring, a connecting rod, a center rod and a spiral sheet; the connecting ring is detachably installed in the opening; one end of the connecting rod is connected to the connecting ring, and the other end is connected to one end of the center rod; the center rod is located on the central axis of the heat exchange tube into which it is inserted; the spiral sheet is arranged on the center rod along its length direction.

[0010] When the liquid in the tube side flows into the heat exchange tube and encounters the spiral blades, it will be disturbed, forming multi-directional flow. At the same time, it can also extend the liquid residence time, greatly improving the heat exchange efficiency and effect.

[0011] Furthermore, the connecting ring and the opening are detachably connected via threads, which facilitates subsequent maintenance and replacement of accessories.

[0012] Furthermore, a plurality of through holes are distributed on the spiral sheet to increase the liquid flow path.

[0013] Furthermore, the spiral directions of the spiral sheets of the two stirring spiral inserts are opposite to each other, which can improve the liquid disturbance effect.

[0014] Furthermore, the length of the central rod extending into the heat exchange tube is one quarter to one third of the length of the heat exchange tube.

[0015] Furthermore, a plurality of baffles are provided in the shell at equal intervals and perpendicular to the heat exchange tubes; the baffles are arched and staggered up and down.

[0016] Compared with the prior art, the shell and tube heat exchanger described in the present invention has the following advantages:

[0017] (1) The shell and tube heat exchanger described in the present invention adopts a detachable stirring assembly installed at the inlet and outlet sections of the heat exchange tubes at both ends of the shell, which disturbs the liquid entering the tube side to form multiple flow directions, while extending the liquid residence time, greatly improving the heat exchange efficiency and heat exchange effect; the stirring assembly is a detachable structure between the heat exchange tubes and the shell, which is convenient for later cleaning and maintenance;

[0018] (2) The stirring spiral insert described in the present invention is suspended at the inlet and outlet sections of the heat exchange tube by insertion, which can effectively disturb the liquid in the tube without affecting the structure of the heat exchange tube itself. After scaling, it can be easily removed for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a structural diagram of a shell and tube heat exchanger according to an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 A magnified view of point A;

[0022] Figure 3 This is a schematic structural diagram of the stirring assembly according to an embodiment of the present utility model;

[0023] Figure 4 This is a structural schematic diagram of the mounting plate described in an embodiment of the present utility model.

[0024] Description of reference numerals:

[0025] 1-shell, 2-head, 3-tube sheet, 4-baffle, 5-agitation assembly, 6-shell inlet, 7-shell outlet, 8-tube inlet, 9-tube outlet, 10-heat exchange tube, 11-mounting plate, 12-agitation spiral plug-in; 13-opening; 14-mounting bolt, 15-jack, 16-locking nut, 17-connecting ring, 18-connecting rod, 19-center rod, 20-spiral sheet, 21-through hole. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0027] In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] like Figures 1 to 4 As shown, a shell and tube heat exchanger includes a shell 1, a head 2, a tube sheet 3, a tube bundle, a baffle 4, and an agitation assembly 5;

[0031] The shell 1 is provided with a shell-side inlet 6 and a shell-side outlet 7;

[0032] There are two heads 2, which are installed at both ends of the shell 1 through flange connection. The two heads 2 are respectively provided with a pipe side inlet 8 and a pipe side outlet 9;

[0033] There are two tube sheets 3, which are installed at both ends of the inner cavity of the shell 1 by seamless welding;

[0034] The tube bundle includes a plurality of heat exchange tubes 10, which are arranged between two tube sheets 3;

[0035] There are multiple baffles 4, which are evenly spaced and perpendicular to the heat exchange tubes 10; the baffles 4 are arched and staggered up and down;

[0036] There are two stirring assemblies 5, which are located at both ends of the shell 1; the stirring assembly 5 includes a mounting plate 11 and a stirring spiral plug-in 12; a plurality of openings 13 corresponding to the tube holes on the tube sheet 3 are distributed on the mounting plate 11; a mounting bolt 14 is provided near the edge of the tube sheet 3 facing the head 2, and a matching socket 15 is provided at the position corresponding to the mounting bolt 14 on the mounting plate 11. The mounting bolt 14 is inserted into the socket 15 and is locked by a locking nut 16 to detachably fix the mounting plate 11 to the tube sheet 3; there are multiple stirring spiral plugs 12, which are arranged one by one corresponding to each opening 13; the stirring spiral plug Component 13 includes a connecting ring 17, a connecting rod 18, a center rod 19 and spiral pieces 20; the connecting ring 17 is detachably mounted in the opening 13 by means of a thread; one end of the connecting rod 18 is connected to the connecting ring 17, and the other end is connected to one end of the center rod 19; the center rod 19 is located on the central axis of the heat exchange tube 10 into which it is inserted, and the length of the center rod 19 extending into the heat exchange tube 10 is one quarter of the length of the heat exchange tube 10; spiral pieces 20 are provided on the center rod 19 along its length, and a plurality of through holes 21 are distributed on the spiral pieces 20; the spiral directions of the spiral pieces 20 of the two stirring spiral inserts 12 are opposite.

[0037] The working process of the shell and tube heat exchanger described in this utility model is as follows:

[0038] The shell-side liquid flows into the shell side from the shell-side inlet 6, flows under the guidance of the baffle 4, and finally flows out from the shell-side outlet 7; the tube-side liquid flows into the tube-side inlet 8 and enters the heat exchange tube 10. The tube-side liquid is stirred by the stirring spiral insert 12 to form turbulence, and fully exchanges heat with the liquid in the shell side, and finally flows out from the heat exchange tube 10 and out through the tube-side outlet 9.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A shell-and-tube heat exchanger comprising a shell, end caps mounted at both ends of the shell, tube sheets seamlessly mounted at both ends of the shell cavity, and a tube bundle extending between the two tube sheets; the shell being provided with a shell-side inlet and a shell-side outlet; and the two end caps being provided with a tube-side inlet and a tube-side outlet, respectively, characterized in that: It also includes a stirring assembly, two of which are located at both ends of the shell; the stirring assembly includes a mounting plate and a stirring spiral plug-in; the mounting plate is distributed with a plurality of openings corresponding to the tube holes on the tube sheet, and the mounting plate is detachably mounted on the side of the tube sheet facing the head; there are a plurality of stirring spiral plug-ins, which are arranged in a one-to-one correspondence with each of the openings, one end of the stirring spiral plug-in is connected to the side wall of the corresponding opening, and the other end extends into the heat exchange tube of the tube bundle.

2. The shell and tube heat exchanger according to claim 1, characterized in that: A mounting bolt is provided on a side of the tube sheet facing the head near the edge; a matching socket is provided on the mounting plate at a position corresponding to the mounting bolt, the mounting bolt is inserted into the socket and locked by a locking nut, so that the mounting plate is detachably fixed to the tube sheet.

3. The shell and tube heat exchanger according to claim 1, characterized in that: The stirring spiral insert includes a connecting ring, a connecting rod, a center rod and spiral sheets; the connecting ring is detachably installed in the opening; one end of the connecting rod is connected to the connecting ring, and the other end is connected to one end of the center rod; the center rod is located on the central axis of the heat exchange tube into which it is inserted; the spiral sheets are arranged on the center rod along its length.

4. The shell and tube heat exchanger according to claim 3, characterized in that: The connecting ring is detachably connected to the opening via threads.

5. The shell and tube heat exchanger according to claim 3, characterized in that: A plurality of through holes are distributed on the spiral sheet.

6. The shell and tube heat exchanger according to claim 3, characterized in that: The spiral directions of the spiral sheets of the two stirring spiral inserts are opposite.

7. The shell and tube heat exchanger according to claim 3, characterized in that: The length of the central rod extending into the heat exchange tube is one quarter to one third of the length of the heat exchange tube.

8. The shell and tube heat exchanger according to claim 1, characterized in that: A plurality of baffles are arranged in the shell at equal intervals and perpendicular to the heat exchange tubes; the baffles are arched and staggered up and down.

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