Longitudinal flow integral baffle plate jet flow heat exchanger

Abstract

The invention 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 invention 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 usually use baffles or support plates as the supporting structure of the tube bundle. The fluid flows through the tube bundle multiple times along the specified path to improve the heat transfer coefficient of the shell side. However, since the fluid needs to cross the tube bundle multiple times, the flushing direction is repeatedly changed, and the flushing angle is roughly vertical, the flow resistance of the fluid is very large, there is a dead zone in the local flow, and it is easy to cause induced vibration, resulting in vibration wear of the heat exchange tube, and finally causing leakage of the heat exchange tube. Summary of the invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a longitudinal flow integral baffle jet heat exchanger, which adopts a whole baffle and has 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 object, 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 fixedly connected to the top of the left end of the cylinder; the medium outlet is vertically arranged and fixedly connected to the bottom of the right end of the cylinder; a plurality of baffles are vertically arranged and fixedly connected to 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 tube is longitudinally and horizontally arranged 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 fixedly connected to the semicircular ring, the semicircular ring is fixedly connected 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.

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

[0012] Furthermore, flanges are provided at the ends of the pipe box and the cylinder, 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 present invention has the following beneficial effects:

[0015] 1. The present invention 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 lateral 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 effectively reduced, and the lateral scouring of the tube bundle is eliminated, which effectively eliminates the fluid-induced vibration and reduces the wear of the tube bundle.

[0016] 2. The baffles of the present invention are arranged vertically and fixedly connected to the cylinder. The baffles have regular pentagonal tube openings, and the outer diameter of the heat exchange tube is tangent to the regular pentagonal tube openings. Since the fluid in the shell flows along the tube bundle, it will generate turbulence when it encounters the baffles. After the intensity of the turbulence decreases, it will encounter the next baffle and generate turbulence again. Such multiple disturbances thin the laminar boundary layer and effectively enhance heat transfer. At the same time, due to the self-cleaning effect of the turbulence, it also makes it difficult for dirt to deposit.

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

[0018] Figure 1 It is a schematic diagram of the structure of the present invention.

[0019] Figure 2 for Figure 1 AA section view.

[0020] Figure 3 It is a schematic diagram of the overall baffle structure of the present invention.

[0021] In the figure: 1-tube box 2-tube sheet 3-medium inlet 4-semi-ring tube 5-cylinder 6-heat exchange tube 7-baffle 8-tie rod 9-spacer 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 combination 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 by no means 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 creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, 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 the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to 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, it indicates 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 described in these embodiments, the numerical expressions and numerical values ​​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 technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

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

[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-ring 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 plate 7 is a whole baffle plate, and a regular pentagonal tube opening 31 is opened on the baffle plate 7, which is tangent to the heat exchange tube 6. After the heat exchange tube 6 is installed, gaps are left at the five inner corners as medium jet holes, and circular jet holes 32 or other shaped jet holes 32 are opened between adjacent regular pentagonal tube openings 31. The longitudinal directions of the regular pentagonal tube openings are consistent, and the directions of adjacent longitudinal tube openings are opposite and arranged alternately. The baffle plate 7 is provided with a tie rod hole 33 and a slideway notch 34.

[0033] The medium inlet 3 is arranged vertically, and is fixed to the semi-circular tube 4, and the semi-circular tube 4 is fixed to the outer wall of the left end of the cylinder 5. The cylinder 5 has holes 16 uniformly opened along the circumference, and can be round holes or other holes such as oblong holes. The width of the hole does not exceed the inner diameter of the semi-circular tube 4. The semi-circular tube 4 is welded to the cylinder 5 to form 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 baffles 7 are arranged vertically and fixed in the cylinder 5. The baffles 7 are integral pieces, 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 by tie rods 8 and distance tubes 9, and are welded to the slideway 13.

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

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

[0037] In this embodiment, the baffle 7 is a whole baffle, and the baffle 7 has a regular pentagonal tube mouth 31, which is tangent to the heat exchange tube 6. After the heat exchange tube 6 is installed, gaps are left at the five inner corners as medium jet holes 32, and circular jet holes are opened along the regular pentagonal tube mouth. The longitudinal directions of the regular pentagonal tube mouths are consistent, and the directions of adjacent longitudinal tube mouths are opposite and arranged alternately. The tube sheet 2 is fixed with the tie rod 8, the first row of spacing tubes 9 are installed, and then the first baffle 7 is installed, and the process is carried out in sequence. After the last baffle 7 is installed, it is fixed by 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 with the baffle 7 and the tube sheet 2 to complete the tube bundle manufacturing. The end of the cylinder 5 is evenly opened along the circumference and welded to the semi-ring tube 4, the end is welded with a flange 15, and the other end is welded with a head 11. The medium inlet 3 is welded to the semi-ring tube 4 to complete the cylinder manufacturing. The tube box 1 is manufactured conventionally. 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, and the inner hole 16 is evenly opened in the cylinder to ensure that the medium inlet 3 is evenly distributed and improve the heat exchange effect. The medium enters the cylinder 5 evenly, flows forward along the baffle 7, and jets forward through the pentagonal inner corner gap and circular jet hole of the baffle 7. After the jet-type integral baffle is used to replace the traditional baffle or support plate, the original shell-side fluid flow direction, which is mainly transverse flow and cross flow, is changed to longitudinal flow along the axial direction of the shell. Not only is the flow field distribution more uniform, there is almost no heat transfer dead zone, but also the shear stress between the tube bundle and the support structure is effectively reduced, and the transverse scouring of the tube bundle is eliminated, the fluid-induced vibration is effectively eliminated, and the wear of the tube bundle is reduced. Since the fluid in the shell flows along the tube bundle, when it encounters the baffle 7, it will generate turbulence. After the intensity of the turbulence is weakened, it will encounter the next baffle 7 and generate turbulence again. Such multiple disturbances thin the laminar boundary layer and effectively enhance the heat transfer. At the same time, due to the self-cleaning effect of the turbulence, it is also difficult for dirt to deposit.

[0039] The above descriptions are only some 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 can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, and they 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 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 fixedly connected to the top of the left end of the cylinder; the medium outlet is vertically arranged and fixedly connected to the bottom of the right end of the cylinder; A plurality of baffles are arranged vertically and fixedly connected to the cylinder body. The baffles are integral pieces, and the flow direction of the shell-side fluid is longitudinal flow along the axial direction of the cylinder body. The heat exchange tubes are arranged longitudinally and horizontally and are installed on the tube sheet.

2. A 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 plate 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. A 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 the 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 fixedly connected to the semicircular ring, the semicircular ring is fixedly connected to the outer wall of the left end of the cylinder, and the cylinder is 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 tie 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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