Jet heat exchanger

Abstract

The utility model relates to the technical field of tubular heat exchangers, in particular to a jet heat exchanger. The axis of the horizontal structure is longitudinally horizontal; comprising a left tube box, a left tube plate, a left barrel, a conical section, a barrel, a right tube plate and a right tube box which are sequentially connected from left to right. The heat exchanger further comprises a medium inlet, a medium outlet, heat exchange tubes and baffle plates. The medium inlet is vertically arranged and is vertically and fixedly connected to the top of the left barrel body; the medium outlet is vertically arranged and is vertically and fixedly connected to the bottom of the right end of the cylinder body; the plurality of baffle plates are vertically arranged and are fixedly connected into the cylinder body; the axes of the heat exchange tubes are longitudinally horizontal, and the two ends are connected with the left tube plate and the right tube plate respectively. The flow field distribution is relatively uniform, almost no heat transfer dead zone exists, the shear stress between the tube bundle and the supporting structure is effectively reduced, the transverse scouring to the tube bundle is also eliminated, the fluid induced vibration is effectively eliminated, and the wear of the tube bundle is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tubular heat exchanger technology, specifically a jet heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers, also known as tubular heat exchangers, are indirect heat exchangers that use the walls of a bundle of heat-exchange tubes enclosed in a shell as the heat transfer surface. These heat exchangers have advantages such as simple structure, low cost, wide flow cross-section, and ease of scale removal; their disadvantages include a low heat transfer coefficient and a large footprint. Shell-and-tube heat exchangers can be manufactured using various structural materials (mainly metals) and can be used under high temperature and high pressure, making them the most widely used type of heat exchanger.

[0003] Currently, tubular heat exchangers typically use baffles or support plates as the support structure for the tube bundle. The fluid flows through the tube bundle multiple times along a predetermined path, improving the heat transfer coefficient of the shell side. However, because the fluid needs to cross the tube bundle multiple times, repeatedly changing its scouring direction, and the scouring angle is roughly vertical, the flow resistance of the fluid is very high, resulting in local flow dead zones and easily inducing vibrations. This leads to vibration and wear of the heat exchange tubes, ultimately causing leaks. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a jet heat exchanger that not only has a relatively uniform flow field distribution and almost no heat transfer dead zone, but also effectively reduces the shear stress between the tube bundle and the support structure, and eliminates the lateral scouring of the tube bundle, effectively eliminating fluid-induced vibration and reducing tube bundle wear.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A jet heat exchanger has a horizontal structure with its axis running longitudinally. It includes, from left to right, a left tube box, a left tube sheet, a left cylinder, a conical section, a cylinder, a right tube sheet, and a right tube box. It also includes a medium inlet, a medium outlet, heat exchange tubes, and baffles. The medium inlet is vertically positioned and fixed to the top of the left cylinder. The medium outlet is vertically positioned and fixed to the bottom right end of the cylinder. Multiple baffles are vertically positioned and fixed to the cylinder. The heat exchange tubes have their axes running longitudinally horizontally, with both ends connected to the left and right tube sheets, respectively.

[0007] Furthermore, the heat exchange tubes are arranged in a square or corner square pattern. The heat exchange tubes can be bare tubes or high-efficiency heat exchange tubes.

[0008] Furthermore, the baffle plate is a single piece of baffle plate with a regular hexagonal tube opening, and the outer diameter of the heat exchange tube is tangent to the regular hexagonal tube opening; after the heat exchange tube is installed, gaps are left at the six interior corners of the regular hexagonal tube opening; jet holes are opened between adjacent regular hexagonal tube openings.

[0009] Furthermore, the hexagonal tube openings are aligned in the same direction or adjacent hexagonal tube openings are rotated 90° and arranged alternately. When installed inside the heat exchanger, it can be one type of baffle or two types of baffles installed alternately.

[0010] Furthermore, the baffle plate is fixedly connected to the left tube sheet by a tie rod and a spacer tube.

[0011] Furthermore, the inner diameter of the left cylinder is larger than the inner diameter of the cylinder.

[0012] Furthermore, it also includes a guide tube, which is fixed to the inner wall of the conical section and located within the left cylinder and the conical section.

[0013] The left cylinder is connected to the cylinder via a conical section 6. The guide tube 7 is welded to the conical section 6. The left cylinder and the guide tube form a medium flow channel. The medium flows into the cylinder through the gap between the guide tube and the left tube sheet. The medium inlet is welded to the left cylinder.

[0014] Furthermore, the inner diameter of the guide tube is larger than the inner diameter of the cylinder.

[0015] Furthermore, the heat exchange tube openings of the left tube sheet and the right tube sheet are identical, and the left tube sheet has a tie rod hole. The outer diameter of the left tube sheet is larger than the outer diameter of the right tube sheet. The left tube sheet is adapted to the left cylinder.

[0016] Furthermore, it also includes an anti-impact plate, which is fixed inside the left tube box.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model has a horizontal structure with a longitudinally horizontal axis. The left tube box, left tube sheet, left cylinder, conical section, cylinder, right tube sheet, and right tube box are connected in sequence. The medium inlet is vertically set and fixed to the top of the left cylinder, and the medium outlet is vertically set and fixed to the bottom of the right end of the cylinder. This changes the flow direction of the shell-side fluid, which was originally dominated by transverse and cross-flow, to longitudinal flow along the shell axis. This not only results in a more uniform flow field distribution with almost no heat transfer dead zones, but also effectively reduces the shear stress between the tube bundle and the support structure, eliminates transverse scouring of the tube bundle, effectively eliminates fluid-induced vibration, and reduces tube bundle wear.

[0019] 2. In this utility model, multiple baffles are vertically arranged and fixed to the cylinder body. The baffles are integral baffles with hexagonal openings tangential to the heat exchange tubes. After the heat exchange tubes are installed, gaps are left at the six interior corners of the hexagonal openings. Jet holes are opened between adjacent hexagonal openings. Since the fluid in the shell side flows along the tube bundle, it will generate turbulence when it encounters a baffle. After the intensity of the turbulence weakens, it will encounter another baffle, generating turbulence again. This repeated turbulence thins the laminar boundary layer, effectively enhancing heat transfer. At the same time, due to the self-cleaning effect of the turbulence, it also makes it difficult for dirt to accumulate.

[0020] 3. This utility model is equipped with a flow guide tube, and the medium inlet adopts a flow guide tube structure to ensure uniform distribution of the medium inlet and improve the heat exchange effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the left tube plate structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the right tube sheet structure of this utility model.

[0024] Figure 4 This is a schematic diagram of the overall baffle structure of this utility model.

[0025] Figure 5 This is a schematic diagram of the staggered overall baffle structure of this utility model.

[0026] In the diagram: 1-Left tube box; 2-Anti-impact plate; 3-Left tube sheet; 4-Medium inlet; 5-Left cylinder; 6-Conical section; 7-Guide tube; 8-Baffle plate; 9-Cylinder body; 10-Spacing tube; 11-Tie rod; 12-Heat exchange tube; 13-Nut; 14-Right tube sheet; 15-Right tube box; 16-Medium outlet; 17-Support; 18-Tie rod hole; 19-Hexagonal nozzle; 20-Jet orifice; 21-Heat exchange tube opening. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0030] Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In the description of this utility model, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0033] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0034] like Figure 1-5 As shown, a jet heat exchanger has a horizontal structure with its axis running longitudinally. It includes, from left to right, a coaxially connected left tube box 1, left tube sheet 3, left cylinder 5, conical section 6, cylinder 9, right tube sheet 14, and right tube box 15, all arranged horizontally along their longitudinal axis. The left and right ends of the bottom of the cylinder 9 are fixed to supports 17, which support the device.

[0035] It also includes a medium inlet 4, a medium outlet 16, heat exchange tubes 12, baffles 8, spacer tubes 10, tie rods 11, and anti-impact plates 2. The medium inlet 4 is vertically oriented and fixed to the top of the left cylinder 5. The medium outlet 16 is vertically oriented and fixed to the bottom right end of the cylinder 9. Multiple baffles 8 are vertically oriented and evenly distributed within the cylinder 9. The heat exchange tubes 12 are horizontally oriented longitudinally, with both ends connected to the left tube sheet 3 and the right tube sheet 14, respectively. The anti-impact plate 2 is fixed inside the left tube box 1, located at the left end.

[0036] The heat exchange tubes 12 are arranged in a square or a corner square. The heat exchange tubes 12 can be bare tubes or high-efficiency heat exchange tubes.

[0037] The baffle plate 8 is a single piece, with a regular hexagonal nozzle 19. The outer diameter of the heat exchange tube 12 is tangent to the regular hexagonal nozzle 19. After the heat exchange tube 12 is installed, gaps are left at the six interior corners of the regular hexagonal nozzle 19 as medium jet holes. Jet holes 20 are opened between adjacent regular hexagonal nozzles 19, and the jet holes 20 can be circular or other shapes.

[0038] The baffles 8 can be regular hexagonal tube openings 19 with the same direction or adjacent regular hexagonal tube openings 19 rotated 90° and arranged alternately. When installed in the heat exchanger, there can be one type of baffle 8 or two types of baffles 8 installed alternately.

[0039] The baffle plate 8 is fixedly connected to the left tube plate 3 via the tie rod 11, the spacer tube 10, and the nut 13.

[0040] The left cylinder 5 and cylinder 9 are connected by a conical section 6. The inner diameter of the left cylinder 5 is larger than that of the cylinder 9. The guide tube 7 is welded to the conical section 6 and is located inside the left cylinder 5 and the conical section 6. The space between the left cylinder 5 and the guide tube 7 is a medium flow channel. The medium flows into the interior of the cylinder 9 through the gap between the guide tube 7 and the left tube sheet 3. The inner diameter of the guide tube 7 is larger than that of the cylinder 9.

[0041] The heat exchange tube openings 21 of the left tube sheet 3 and the right tube sheet 14 are identical, and the left tube sheet 3 has a tie rod hole 18. The outer diameter of the left tube sheet 3 is larger than the outer diameter of the right tube sheet 14. The left tube sheet 3 is compatible with the left cylinder 5.

[0042] The installation process of this utility model is as follows:

[0043] The medium inlet 4 is welded to the left cylinder 5, and the medium outlet 16 is welded to the cylinder 9. The left cylinder 5 is welded to the conical section 6 and the cylinder 9, the guide tube 7 is welded to the conical section 6, and the other end of the left cylinder 5 is welded to the left tube sheet 3. The baffle 8 is a single piece of baffle plate with hexagonal openings 19. The outer diameter of the heat exchange tube 12 is tangent to the hexagonal openings 19. After the heat exchange tube 12 is installed, gaps are left at the six inner corners as medium jet holes. At the same time, circular jet holes 20 or other shaped jet holes are opened between adjacent hexagonal openings 19. The baffle 8 can be arranged with the hexagonal openings 19 in the same direction, or adjacent hexagonal openings 19 can be rotated 90° and arranged alternately. When installed in the heat exchanger, one type of baffle 8 or two types of baffle 8 can be installed alternately. The left tube sheet 3 is fixed to the tie rod 11, the first row of spaced tubes 10 is installed, then the first baffle 8 is installed, and so on, until the last baffle 8 is installed and fixed with nuts 13. After the baffle 8 is fixed, the right end of the cylinder 9 is welded to the right tube sheet 14, and the heat exchange tubes 12 are installed, completing the tube bundle manufacturing. The left tube box 1 and the right tube box 15 are manufactured according to conventional methods. The left tube box 1 and the right tube box 15 are connected to the tube bundle with bolts, completing the heat exchanger assembly.

[0044] This invention employs a flow guide tube 7 structure at the medium inlet to ensure uniform medium distribution and improve heat exchange efficiency. The medium enters the cylinder 9 uniformly, flows forward along the baffle 8, and is ejected forward through the gaps at the six inner corners of the hexagonal nozzle 19 of the baffle 8 and the circular jet holes. By replacing the traditional baffle or support plate with a jet-type integral baffle, the flow direction of the shell-side fluid, which was originally dominated by transverse and cross-flow, is changed to longitudinal flow along the shell axis. This not only results in a more uniform flow field distribution with almost no heat transfer dead zones, but also effectively reduces the shear stress between the tube bundle and the support structure, eliminates transverse scouring of the tube bundle, effectively eliminates fluid-induced vibration, and reduces tube bundle wear.

[0045] Since the fluid in the shell side flows along the tube bundle, it will generate turbulence when it encounters a baffle. After the intensity of the turbulence weakens, it will encounter another baffle and generate turbulence again. This repeated turbulence thins the laminar boundary layer, effectively enhancing heat transfer. At the same time, due to the self-cleaning effect of the turbulence, it also makes it difficult for dirt to accumulate.

[0046] The above description is only a part of the specific embodiments of this utility model. The protection scope of this utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and utility model concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A jet heat exchanger, characterized in that: It has a horizontal structure with the longitudinal axis horizontal; It includes, from left to right, the left tube box, left tube sheet, left cylinder, conical section, cylinder, right tube sheet and right tube box connected in sequence; It also includes a medium inlet, a medium outlet, heat exchange tubes, and baffles; the medium inlet is vertically fixed to the top of the left cylinder; the medium outlet is vertically fixed to the bottom of the right end of the cylinder. The baffles are arranged vertically and fixed to the cylinder body; The heat exchange tubes are longitudinally horizontal, with their two ends connected to the left tube sheet and the right tube sheet, respectively.

2. The jet heat exchanger according to claim 1, characterized in that: The heat exchange tubes are arranged in a square or a corner square.

3. A jet heat exchanger according to claim 1, characterized in that: The baffle is a single piece of baffle with a regular hexagonal tube opening, and the outer diameter of the heat exchange tube is tangent to the regular hexagonal tube opening; After the heat exchange tubes are installed, gaps are left at the six interior corners of the regular hexagonal tube openings; jet holes are opened between adjacent regular hexagonal tube openings.

4. A jet heat exchanger according to claim 3, characterized in that: The regular hexagonal tube openings are aligned in the same direction or adjacent regular hexagonal tube openings are rotated 90° and arranged alternately.

5. A jet heat exchanger according to claim 1, characterized in that: The baffle plate is fixed to the left tube sheet by a tie rod and a spacer tube.

6. A jet heat exchanger according to claim 1, characterized in that: The inner diameter of the left cylinder is larger than the inner diameter of the cylinder.

7. A jet heat exchanger according to claim 1, characterized in that: It also includes a flow guide tube, which is fixed to the inner wall of the conical section and located inside the left cylinder and the conical section.

8. A jet heat exchanger according to claim 7, characterized in that: The inner diameter of the guide tube is larger than the inner diameter of the cylinder.

9. A jet heat exchanger according to claim 1, characterized in that: The heat exchange tube openings of the left tube sheet and the right tube sheet are the same, and the left tube sheet has a tie rod hole; the outer diameter of the left tube sheet is larger than the outer diameter of the right tube sheet.

10. A jet heat exchanger according to claim 1, characterized in that: It also includes a shock-absorbing plate, which is fixed inside the left tube box.

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