Bubble corrosion prevention structure of tubular heat exchanger

Abstract

The bubble corrosion prevention structure comprises a shell, a tube plate, a baffle plate and a plurality of tube bundles, the tube plate, the baffle plate and the tube bundles are closed in the shell, a shell pass inlet is formed in the shell, an anti-scour bottom plate is arranged below the shell pass inlet in a suspended mode, and the shell pass inlet is communicated with the shell pass inlet. And a small hole matrix is arranged on the anti-impact bottom plate right below the shell pass inlet. The stainless steel anti-impact bottom plate is arranged at the shell pass inlet, the small holes are evenly drilled in the anti-impact plate right opposite to the inlet, bubbles are eliminated, meanwhile, media are evenly distributed, the stainless steel wire net clamped by the baffle is arranged in the circumferential direction of the shell pass inlet, the bubbles in liquid are effectively reduced, bubble corrosion is reduced, and the service life of the heat exchanger is prolonged.

Description

Technical Field

[0001] This application belongs to the field of heat exchangers, and specifically relates to an anti-bubble corrosion structure for a shell-and-tube heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers are widely used equipment in the oil refining and chemical industries. Also known as tube-and-shell heat exchangers, they are indirect heat exchangers that use the walls of tube bundles enclosed in a shell as the heat transfer surface. Two fluids exchange heat: one flows inside the tubes (tube-side fluid), and the other flows outside the tubes (shell-side fluid). Heat exchange occurs through the tube walls, achieving the purpose of heating or cooling.

[0003] The service life of a shell-and-tube heat exchanger directly affects the manufacturing cost of the entire unit. At the inlet of the shell side of the heat exchanger, turbulence or temperature changes in the liquid at the inlet cause a local pressure drop, forming bubbles. When these bubbles collapse, they generate high-pressure shock waves that can not only tear the metal surface but also knock the metal into tiny particles that detach from the surface. New bubbles will then form at the same point and collapse rapidly. This process repeats itself, leading to heat exchanger leakage due to bubble corrosion.

[0004] Therefore, a technical solution to prevent bubble corrosion is needed to solve the above problems. Utility Model Content

[0005] To address the shortcomings of the prior art, this application provides an anti-bubble corrosion structure for a shell-and-tube heat exchanger, which can eliminate bubbles, reduce bubble corrosion, and improve the service life of the heat exchanger.

[0006] The technical effect to be achieved in this application is accomplished through the following solution:

[0007] According to a first aspect of this application, a bubble corrosion prevention structure for a shell-and-tube heat exchanger is provided, comprising a shell and a tube sheet, baffles and a plurality of tube bundles enclosed within the shell. The shell is provided with a shell-side inlet, and an anti-impact base plate is suspended below the shell-side inlet. A matrix of small holes is provided on the anti-impact base plate directly below the shell-side inlet.

[0008] Preferably, the aperture matrix is ​​circular, and the radius of the aperture matrix is ​​not less than the cross-sectional area of ​​the shell inlet.

[0009] Preferably, the two sides of the anti-impact base plate are bent upward to form an anti-impact section, and the anti-impact section is provided with an anti-foam mesh matrix.

[0010] Preferably, the anti-foaming part is provided with a rectangular opening, and the rectangular opening is covered with a stainless steel wire mesh, which forms the defoaming mesh matrix.

[0011] Preferably, the stainless steel wire mesh is fixed to the lower part of the rectangular opening by a clamping plate, and the clamping plate is fixed to the anti-impact part by bolts.

[0012] Preferably, the anti-impact base plate is made of stainless steel.

[0013] Preferably, the anti-impact base plate is welded to the tube sheet and the baffle plate.

[0014] According to one embodiment of this application, the beneficial effect of the anti-bubble corrosion structure of the shell-and-tube heat exchanger of this application is that by setting a stainless steel anti-impact base plate at the shell-side inlet and drilling small holes evenly arranged on the anti-impact plate directly opposite the inlet, bubbles are eliminated and the medium is evenly distributed. A stainless steel wire mesh clamped by baffles is set around the shell-side inlet, which effectively reduces bubbles in the liquid, reduces the generation of bubble corrosion, and improves the service life of the heat exchanger. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this application or the existing technical solutions, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view schematic diagram of an anti-bubble corrosion structure for a shell-and-tube heat exchanger according to an embodiment of this application;

[0017] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0018] Figure 3 for Figure 2 Top view of the anti-impact base plate;

[0019] Figure 4 for Figure 2 A schematic diagram of the structure of the central anti-impact section. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] like Figures 1 to 4As shown, the anti-bubble corrosion structure of the shell-and-tube heat exchanger in one embodiment of this application includes a shell 100 and a tube sheet 110, a baffle plate 120 and a plurality of tube bundles 102 enclosed in the shell 100. A shell-side inlet 101 is provided on the shell 100, and an anti-impact base plate 200 is suspended below the shell-side inlet 101. A small hole matrix 201 is provided on the anti-impact base plate 200 directly below the shell-side inlet 101.

[0022] In this embodiment, the fluid in the tube enters the shell 100 through the shell inlet 101 and directly impacts the anti-impact base plate 200, avoiding impact on the inner wall of the shell 100 and the outer wall of the tube bundle 102. The arrangement of the small hole matrix 201 can eliminate a large number of bubbles generated by the impact while ensuring the fluid flow through the tube, so that the medium is evenly distributed and the corrosion caused by the bubbles is reduced.

[0023] In one embodiment of this application, the orifice matrix 201 is circular, and the radius of the orifice matrix 201 is not less than the cross-sectional area of ​​the shell-side inlet 101. This ensures that all the input tube-side liquid can impact the orifice matrix 201, completing the defoaming process.

[0024] In one embodiment of this application, the anti-impact base plate 200 is bent upwards on both sides to form anti-impact portions 210, and an anti-foaming mesh matrix 211 is provided on the anti-impact portions 210. The anti-impact portions 210 can block the fluid splashed up when impacting the anti-impact base plate 200, and perform defoaming and filtration through the defoaming mesh, thereby improving the throughput and further eliminating bubbles, and preventing corrosion caused by bubbles in the splashed liquid.

[0025] In the embodiment, in addition to the anti-foaming part 210 being provided with an anti-foaming mesh matrix 211, an anti-foaming mesh matrix is ​​also provided on the other two side pages.

[0026] In one embodiment of this application, the anti-foaming part 210 is provided with a rectangular opening, and a stainless steel wire mesh 220 is covered on the rectangular opening, forming an anti-foaming mesh matrix 211. The stainless steel wire mesh 220 has a highly efficient defoaming effect and does not affect the passage of liquid.

[0027] In one embodiment of this application, the stainless steel wire mesh 220 is fixed to the lower part of the rectangular opening by a clamping plate 230, and the clamping plate 230 is fixed to the anti-impact part 210 by bolts 231. This facilitates the replacement of the stainless steel wire mesh 220 for maintenance and repair.

[0028] In one embodiment of this application, the anti-impact base plate 200 is made of stainless steel. This increases the service life of the anti-impact base plate 200, reduces maintenance frequency, and improves production efficiency.

[0029] In one embodiment of this application, the anti-impact base plate 200 is welded to the tube sheet 110 and the baffle plate 120. This facilitates the installation of the anti-impact base plate 200, thereby making it easier to upgrade existing shell-and-tube heat exchangers.

[0030] According to one embodiment of this application, the beneficial effect of the anti-bubble corrosion structure of the shell-and-tube heat exchanger of this application is that by setting a stainless steel anti-impact base plate at the shell-side inlet and drilling small holes evenly arranged on the anti-impact plate directly opposite the inlet, bubbles are eliminated and the medium is evenly distributed. A stainless steel wire mesh clamped by baffles is set around the shell-side inlet, which effectively reduces bubbles in the liquid, reduces the generation of bubble corrosion, and improves the service life of the heat exchanger.

[0031] It should be noted that the above detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0032] 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 application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. 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.

[0033] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0034] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0035] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0036] In the detailed description above, reference has been made to the accompanying drawings, which form part of this document. In the drawings, similar symbols typically identify similar parts unless the context otherwise indicates otherwise. The illustrated embodiments described in the detailed specification, drawings, and claims are not intended to be limiting. Other embodiments may be used and other changes may be made without departing from the spirit or scope of the subject matter presented herein.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A bubble corrosion prevention structure for a shell-and-tube heat exchanger, comprising a shell and a tube sheet, baffles, and a plurality of tube bundles enclosed within the shell, wherein the shell has a shell-side inlet, characterized in that, An anti-impact base plate is suspended below the shell-side inlet, and a matrix of small holes is provided on the anti-impact base plate directly below the shell-side inlet.

2. The anti-bubble corrosion structure for the shell-and-tube heat exchanger according to claim 1, characterized in that, The aperture matrix is ​​arranged in a circle, and the radius of the aperture matrix is ​​not less than the cross-sectional area of ​​the shell inlet.

3. The anti-bubble corrosion structure for the shell-and-tube heat exchanger according to claim 1, characterized in that, The anti-impact base plate is bent upwards on both sides to form an anti-impact section, and an anti-foam mesh matrix is ​​provided on the anti-impact section.

4. The anti-bubble corrosion structure for the shell-and-tube heat exchanger according to claim 3, characterized in that, The anti-impact part is provided with a rectangular opening, and the rectangular opening is covered with a stainless steel wire mesh, which forms the defoaming mesh matrix.

5. The anti-bubble corrosion structure for the shell-and-tube heat exchanger according to claim 4, characterized in that, The stainless steel wire mesh is fixed to the lower part of the rectangular opening by a clamping plate, and the clamping plate is fixed to the anti-impact part by bolts.

6. The anti-bubble corrosion structure for the shell-and-tube heat exchanger according to claim 1, characterized in that, The anti-impact base plate is made of stainless steel.

7. The anti-bubble corrosion structure for the shell-and-tube heat exchanger according to claim 1, characterized in that, The anti-impact base plate is welded to the tube sheet and the baffle plate.

Images