Longitudinal flow integral baffle plate jet flow heat exchanger

Abstract

The utility model relates to the technical field of jet flow heat exchangers, in particular to a longitudinal flow integral baffle plate jet flow heat exchanger. The axis of the horizontal structure is longitudinally horizontal; comprising a tube box, a tube plate, a barrel and a seal head 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 fixedly connected to the top of the left end of the cylinder body; the medium outlet is vertically formed and fixedly connected to the bottom of the right end of the barrel; the multiple baffle plates are vertically arranged and fixedly connected into the cylinder body, the baffle plates are integrated, and the flow direction of shell pass fluid is longitudinal flow in the axial direction of the cylinder body; and the heat exchange tubes are longitudinally and horizontally arranged on the tube plate. The whole baffle plate is adopted, the jet flow holes are formed, the flow direction of shell pass fluid is longitudinal flow in the axial direction of the shell, fluid induced vibration is effectively eliminated, and abrasion of a tube bundle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of jet heat exchangers, in particular to a longitudinal flow integral baffle jet heat exchanger. Background Art

[0002] A heat exchanger is a system used to transfer heat between two or more fluids. Commonly used heat exchangers include shell and tube heat exchangers, plate heat exchangers, shell and tube heat exchangers, and spiral plate heat exchangers.

[0003] Conventional heat exchangers typically use baffles or support plates as the supporting structure for the tube bundle. The fluid flows through the tube bundle multiple times along a prescribed path, improving the shell-side heat transfer coefficient. However, because the fluid must repeatedly cross the tube bundle, repeatedly changing its direction of flow, and the angle of flow is roughly vertical, the fluid flow resistance is high, resulting in localized dead zones and easily inducing vibration, which can cause vibration wear of the heat exchange tubes and ultimately lead to leakage. Utility Model Content

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides a longitudinal flow integral baffle jet heat exchanger, which adopts a whole baffle with jet holes. The flow direction of the shell-side fluid is a longitudinal flow along the axial direction of the shell, which effectively eliminates fluid-induced vibration and reduces the wear of the tube bundle.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A longitudinal flow integral baffle jet heat exchanger is a horizontal structure with a longitudinal axis horizontal; it includes a tube box, a tube sheet, a cylinder and a head connected in sequence from left to right; it also includes a medium inlet, a medium outlet, a heat exchange tube and a baffle; the medium inlet is vertically arranged and fixed to the top of the left end of the cylinder; the medium outlet is vertically arranged and fixed to the bottom of the right end of the cylinder; multiple baffles are vertically arranged and fixed in the cylinder, the baffles are a whole piece, and the flow direction of the shell-side fluid is a longitudinal flow along the axial direction of the cylinder; the heat exchange tubes are longitudinally arranged horizontally and installed on the tube sheet.

[0007] Furthermore, the heat exchange tubes are arranged in a square or a corner square.

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

[0009] Furthermore, the longitudinal directions of the regular pentagonal pipe openings are consistent, and adjacent longitudinal regular pentagonal pipe openings are rotated 180° and arranged alternately.

[0010] Furthermore, it also includes a semicircular ring, the medium inlet is fixed to the semicircular ring, the semicircular ring is fixed to the outer wall of the left end of the cylinder, and the cylinder has holes evenly opened along the circumference, forming a uniformly distributed channel for the medium to enter the cylinder.

[0011] Furthermore, the baffle is fixed to the tube sheet through a pull rod and a distance tube, and is fixed to the slideway.

[0012] Furthermore, the pipe box and the end of the cylinder are both provided with flanges, the two flanges clamp the tube sheet, and the two flanges are connected by bolts.

[0013] Furthermore, the heat exchanger is a U-tube heat exchanger, a floating head heat exchanger, or a fixed tube sheet heat exchanger.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model adopts a jet-type integral baffle to replace the traditional baffle or support plate, so that the original shell-side fluid flow direction, which is mainly transverse flow and cross flow, is changed to a longitudinal flow along the axial direction of the shell. Not only is the flow field distribution more uniform, with almost no heat transfer dead zone, but the shear stress between the tube bundle and the supporting structure is also effectively reduced, and the transverse scouring of the tube bundle is also eliminated, effectively eliminating the fluid-induced vibration and reducing the wear of the tube bundle.

[0016] 2. The present invention employs multiple vertically arranged baffles fixedly attached to the cylinder. Each baffle features a regular pentagonal orifice, and the outer diameter of the heat exchange tube is tangential to the orifice. Because the fluid in the shell-side flows along the tube bundle, it experiences turbulence when it encounters a baffle. After the turbulence weakens, it encounters the next baffle, generating further turbulence. These multiple turbulences thin the laminar boundary layer, effectively enhancing heat transfer. Furthermore, the self-cleaning effect of the turbulence prevents dirt from settling.

[0017] 3. The medium inlet adopts a semi-ring tube structure with holes evenly opened inside the cylinder to ensure uniform distribution of the medium inlet and improve the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the utility model.

[0019] Figure 2 for Figure 1 AA cross-sectional view.

[0020] Figure 3 This is a schematic diagram of the overall baffle structure of the utility model.

[0021] In the figure: 1 - tube box 2 - tube sheet 3 - medium inlet 4 - semi-annular tube 5 - cylinder 6 - heat exchange tube 7 - baffle 8 - tie rod 9 - distance tube 10 - nut 11 - head 12 - medium outlet 13 - slide 14 - support 15 - flange 16 - hole 31 - regular pentagonal tube orifice 32 - jet hole 33 - tie rod hole 34 - slide notch DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may 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 these terms in this utility model based on the specific circumstances.

[0025] In the description of the present invention, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0027] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0028] like Figure 1-3 As shown, a longitudinal flow integral baffle jet heat exchanger is a horizontal structure with a longitudinal axis horizontal; it includes a tube box 1, a tube sheet 2, a cylinder 5 and a head 11 connected in sequence from left to right, and a support 14 is fixed to the bottom of the cylinder 15.

[0029] It also includes a medium inlet 3, a medium outlet 12, a semi-annular tube 4, a heat exchange tube 6, a baffle 7, a pull rod 8, a distance tube 9, a nut 10, a slideway 13, a support 14 and a flange 15.

[0030] The heat exchanger can be a U-tube heat exchanger, a floating head heat exchanger, or a fixed tube sheet heat exchanger.

[0031] The heat exchange tubes 6 are arranged in a square or a corner square. The heat exchange tubes 6 can be plain tubes or high-efficiency heat exchange tubes.

[0032] The baffle 7 is a single piece with regular pentagonal orifices 31 tangential to the heat exchange tubes 6. After the heat exchange tubes 6 are installed, gaps are left at the five inner corners to serve as medium injection holes. Circular orifices 32 or other shaped orifices 32 are also provided between adjacent regular pentagonal orifices 31. The longitudinal orifices of the regular pentagons are aligned, while adjacent longitudinal orifices are arranged in opposite directions, alternating between them. The baffle 7 is provided with tie rod holes 33 and slideway notches 34.

[0033] The medium inlet 3 is vertically arranged and fixed to a semi-circular tube 4, which is fixed to the outer wall of the left end of the cylinder 5. The cylinder 5 has holes 16 uniformly opened along its circumference. These holes can be circular holes, oblong holes, or other holes. The width of the holes does not exceed the inner diameter of the semi-circular tube 4. The semi-circular tube 4 is welded to the cylinder 5, forming a uniformly distributed channel for the medium to enter the cylinder. The medium inlet 3 is welded to the semi-circular tube 4.

[0034] The multiple baffles 7 are arranged vertically and fixed in the cylinder 5. The baffles 7 are a whole piece, and the flow direction of the shell-side fluid is a longitudinal flow along the axial direction of the cylinder; the baffles 7 are fixed to the tube sheet 2 through tie rods 8 and distance tubes 9, and are welded to the slide 13.

[0035] The heat exchange tubes 6 are arranged longitudinally and horizontally and are mounted on the tube sheet 2. The heat exchange tubes 6 are arranged in a square or corner square shape.

[0036] Flanges 15 are provided at the ends of the pipe box 1 and the cylinder 2. The two flanges 15 clamp the tube sheet 2 and are connected by bolts.

[0037] In this embodiment, the baffle 7 is a single piece with a regular pentagonal nozzle 31 tangent to the heat exchange tube 6. After the heat exchange tube 6 is installed, gaps are left at the five inner corners to serve as medium injection holes 32. Circular injection holes are also opened along the regular pentagonal nozzle. The longitudinal nozzles of the regular pentagon are in the same direction, while adjacent longitudinal nozzles are in opposite directions and arranged alternately. The tube sheet 2 is fixed with the tie rod 8, the first row of spacing tubes 9 is installed, and then the first baffle 7 is installed. This is done in sequence. After the last baffle 7 is installed, it is fixed with the nut 10. After the baffle 7 is fixed, the heat exchange tube 6 is installed, and finally the slide 13 is installed and welded to the baffle 7 and tube sheet 2 to complete the tube bundle. Holes are evenly opened along the circumference of the end of the cylinder 5 and welded to the semi-annular tube 4. A flange 15 is welded to the end, and a head 11 is welded to the other end. The medium inlet 3 is welded to the semi-annular tube 4 to complete the cylinder manufacturing. The tube box 1 is manufactured in a conventional manner. The flange of the tube box 1 and the flange of the cylinder clamp the tube sheet 2 and are connected by bolts to complete the assembly of the heat exchanger.

[0038] The medium inlet 3 adopts a semi-annular tube structure with uniformly opened holes 16 inside the cylinder, ensuring uniform distribution of the medium inlet 3 and improving heat exchange efficiency. The medium enters the cylinder 5 evenly, flows forward along the baffle 7, and is ejected forward through the pentagonal inner corner gaps and circular jet holes of the baffle 7. By replacing traditional baffles or support plates with jet-type integral baffles, the shell-side fluid flow direction, which was originally dominated by transverse and cross-current, is transformed into a longitudinal flow along the shell axis. This not only achieves a more uniform flow field distribution and virtually eliminates heat transfer dead zones, but also effectively reduces shear stress between the tube bundle and the support structure, eliminates lateral scouring of the tube bundle, effectively eliminates fluid-induced vibration, and reduces tube bundle wear. Since the shell-side fluid flows along the tube bundle, it will generate turbulence when it encounters the baffle 7. After the intensity of the turbulence decreases, it will encounter the next baffle 7, generating turbulence again. These multiple turbulences thin the laminar boundary layer, effectively enhancing heat transfer. At the same time, the self-cleaning effect of the turbulence also prevents dirt from depositing.

[0039] The above description is only part of the specific implementation methods of the present invention, and the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and the utility model concept of the present invention, should be covered by the protection scope of the present invention.

Claims

1. A longitudinal flow integral baffle jet heat exchanger, characterized in that: It is a horizontal structure with the longitudinal axis horizontal; It includes the tube box, tube sheet, cylinder and head connected in sequence from left to right; It also includes a medium inlet, a medium outlet, a heat exchange tube and a baffle; the medium inlet is vertically arranged and fixed to the top of the left end of the cylinder; the medium outlet is vertically arranged and fixed to the bottom of the right end of the cylinder; The baffles are arranged vertically and fixedly connected to the cylinder. The baffles are integral pieces, and the flow direction of the shell-side fluid is longitudinal flow along the axial direction of the cylinder. The heat exchange tubes are arranged longitudinally and horizontally and are installed on the tube sheet.

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

3. The longitudinal flow integral baffle jet heat exchanger according to claim 1, characterized in that: The baffle has a regular pentagonal tube opening, and the outer diameter of the heat exchange tube is tangent to the regular pentagonal tube opening; After the heat exchange tubes are installed, gaps are left at the six inner corners of the regular pentagonal tube openings; and jet holes are opened between adjacent regular pentagonal tube openings.

4. The longitudinal flow integral baffle jet heat exchanger according to claim 3, characterized in that: The longitudinal directions of the regular pentagonal pipe openings are consistent, and adjacent longitudinal regular pentagonal pipe openings are rotated 180 degrees and arranged alternately.

5. The longitudinal flow integral baffle jet heat exchanger according to claim 1, characterized in that: It also includes a semicircular ring, the medium inlet is fixed to the semicircular ring, the semicircular ring is fixed to the outer wall of the left end of the cylinder, and the cylinder has holes evenly opened along the circumference to form a uniformly distributed channel for the medium to enter the cylinder.

6. The longitudinal flow integral baffle jet heat exchanger according to claim 1, characterized in that: The baffle is fixed to the tube sheet through a pull rod and a distance tube, and is fixedly connected to the slideway.

7. The longitudinal flow integral baffle jet heat exchanger according to claim 1, characterized in that: The pipe box and the ends of the cylinder are both provided with flanges, the two flanges clamp the tube sheet, and the two flanges are connected by bolts.

8. The longitudinal flow integral baffle jet heat exchanger according to claim 1, characterized in that: The heat exchanger is a U-tube heat exchanger, a floating head heat exchanger, or a fixed tube sheet heat exchanger.

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