CN206094996U - Shell -and -tube heat exchanger - Google Patents

Abstract

The utility model discloses a shell -and -tube heat exchanger belongs to the heat exchanger field. This heat exchanger includes: casing, heat transfer tube bank and a plurality of baffling board subassembly, conduct heat the tube bank with a plurality of baffling board subassemblies are all installed in the casing, a plurality of baffling board subassemblies are followed the length direction equidistance interval arrangement of casing, every baffling board subassembly all includes the triangle baffling board that a plurality of helical structure of being arranged, every all be equipped with a plurality of tube holes on the triangle baffling board, conduct heat the tube bank through corresponding the tube hole cartridge is in in the baffling board subassembly. The utility model discloses reduced and be detained the production in blind spot, and then improved the heat exchange efficiency of heat exchanger.

Description

A shell and tube heat exchanger

technical field

The utility model belongs to the field of heat exchangers, in particular to a shell-and-tube heat exchanger.

Background technique

Heat exchanger is one of the most widely used unit equipment in energy system, and plays an important role in production. Due to the advantages of reliable structure, mature technology and wide application range, shell and tube heat exchangers are widely used in industrial production. The shell and tube heat exchanger mainly includes the shell, the heat transfer tube bundle and the baffle. The baffle is one of its most important parts. On the one hand, it is used to support the heat transfer tube bundle and reduce the deflection of the heat transfer tube bundle. On the one hand, the baffle can change the flow velocity and flow direction of the fluid in the shell, increase the turbulence of the shell-side fluid, and thus effectively improve the heat exchange efficiency of the heat exchanger. At present, ordinary baffles will lead to a certain stagnation dead zone in the shell, which affects the heat transfer efficiency of the heat exchanger.

Utility model content

In order to solve the problem that the existing baffles easily lead to more stagnation dead zones in the shell, the embodiment of the utility model provides a shell-and-tube heat exchanger. Described technical scheme is as follows:

The embodiment of the utility model provides a shell-and-tube heat exchanger, the heat exchanger includes: a shell, a heat transfer tube bundle and a plurality of baffle assemblies, the heat transfer tube bundle and the plurality of baffles The components are installed in the housing, and the plurality of baffle components are arranged at equal intervals along the length direction of the housing, and each of the baffle components includes a plurality of triangular baffles arranged in a spiral structure plate, each of the triangular baffles is provided with a plurality of tube holes, and the heat transfer tube bundle is inserted into the baffle assembly through the corresponding tube holes;

Each of the triangular baffles is a curved plate member, and the curvature of each of the triangular baffles is 0.5 to 1.5 times the inner diameter of the housing.

In another implementation manner of the present invention, the sum of the projected areas of the plurality of tube holes of the triangular baffle on the cross section of the heat exchanger is 30% to 40% of the projected area on the cross section of the heat exchanger.

In yet another implementation of the present utility model, each of the triangular baffles includes a first side, a second side, an outer arc and an inner arc, and each of the triangular baffles An included angle between the first side and the second side of the nearest triangular baffle is 15° to 90°.

In yet another implementation of the present invention, the inner arc edge of the triangular baffle is provided with a depression, and the depression on the triangular baffle of the same baffle assembly is located on the A central hole is formed on the cross section of the heater, and the diameter of the central hole is 1 to 2 times the diameter of the tube hole.

In yet another implementation of the present utility model, a plurality of pull rods for supporting the triangular baffles are installed in the housing, and the two ends of each pull rod are fixedly installed on two ends of the heat exchanger. The tube plate at the end is arranged parallel to the length direction of the shell, and each of the triangular baffles is respectively set outside the three corresponding tie rods, and each two adjacent triangular baffles are provided with There are spacer tubes corresponding to the pull rods one by one, and the three spacer tubes are respectively located at the top of the outer arc, the middle of the first side and the middle of the second side, Each of the distance tubes is sleeved on the respective corresponding pull rods, and the distance tubes are parallel to the length direction of the housing.

In yet another implementation of the present utility model, both ends of the housing are respectively connected to tube boxes through the tube sheets, one end of the heat transfer tube bundle communicates with one of the tube boxes, and the heat transfer The other end of the tube bundle communicates with the other tube box, and the two tube boxes are respectively provided with a tube pass outlet and a tube pass inlet, and the tube pass outlet and the tube pass inlet respectively pass through the respective corresponding The tube box communicates with the heat transfer tube bundle.

In yet another implementation manner of the present invention, a shell-side outlet and a shell-side inlet are respectively provided on the outer peripheral walls at both ends of the housing, and the shell-side outlet and the shell-side inlet are connected.

In yet another implementation of the present utility model, the heat transfer tube bundle includes a plurality of heat transfer tubes, each of the heat transfer tubes is inserted into the corresponding tube hole, and each of the heat transfer tubes is parallel to each other. layout.

In yet another implementation manner of the present utility model, the baffle assembly is a carbon steel component or a stainless steel component.

The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

When the heat exchanger provided in this embodiment is in operation, the heat exchange fluid flows between the shell and the heat transfer tube bundle. When the heat exchange fluid flows through the baffle assembly, the heat exchange fluid passes through Under the action, a rotating vortex is formed, so that the rotating heat exchange fluid can flow through each area between the shell and the heat transfer tube bundle, greatly reducing the stagnation dead zone, and thus improving the heat exchange efficiency of the heat exchanger.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present utility model more clearly, the following will briefly introduce the drawings required for the description of the embodiments. Apparently, the drawings in the following description are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

Fig. 1 is a schematic structural view of a heat exchanger provided by an embodiment of the present invention;

Fig. 2 is a schematic structural view of a triangular baffle provided by an embodiment of the present invention;

Fig. 3 is a left view of the baffle assembly provided by the embodiment of the present invention;

The meanings of the symbols in the figure are as follows:

1-shell, 11-shell side outlet, 12-shell side inlet, 2-heat transfer tube bundle, 21-heat transfer tube, 3-baffle assembly, 31-triangular baffle, 311-first side, 312-second side, 313-outer arc edge, 314-inner arc edge, 32-tube hole, 33-center hole, 4-tube plate, 5-tube box, 51-tube pass outlet, 52-tube pass inlet .

detailed description

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

Example

A shell-and-tube heat exchanger provided by the embodiment of the utility model, as shown in Figure 1, the heat exchanger includes a shell 1, a heat transfer tube bundle 2 and a plurality of baffle assemblies 3, Each baffle assembly 3 is installed in the casing 1, and a plurality of baffle assemblies 3 are arranged at equal intervals along the length direction of the casing 1, and each baffle assembly 3 includes a plurality of triangles arranged in a spiral structure. The baffles 31 are provided with a plurality of tube holes 32 on each triangular baffle 31 , and the heat transfer tube bundle 2 is inserted into the baffle assembly 3 through the corresponding tube holes 32 .

When the heat exchanger provided in this embodiment is working, the heat exchange fluid flows between the shell 1 and the heat transfer tube bundle 2. Under the action of the flow plate 31, it becomes a rotating vortex, so that the rotating heat exchange fluid can flow through each area between the shell 1 and the heat transfer tube bundle 2, which greatly reduces the generation of stagnation dead zone, and thus improves the heat exchange. The heat exchange efficiency of the device.

Preferably, the baffle assembly 3 is a carbon steel member or a stainless steel member, thereby delaying the corrosion of the baffle assembly 3 and improving the service life of the heat exchanger. Moreover, the baffle assembly 3 made of carbon steel or stainless steel also has good thermal conductivity. It should be noted that the material of the baffle assembly 3 is not limited to the above-mentioned preferred solution, in other embodiments, it can also be made of other materials, and the present invention is not limited here.

Fig. 2 is a structural schematic diagram of a triangular baffle. In this embodiment, each triangular baffle 31 is a curved plate member, and the curvature of each triangular baffle 31 is 0.5 times to the inner diameter of the housing 1. 1.5 times, so that the baffle assembly 3 composed of a plurality of triangular baffles 31 can have a spiral structure, which is beneficial to the heat exchange fluid to form a rotating vortex, and improves the heat exchange efficiency of the heat exchanger.

It should be noted that the curvature of the triangular baffle 31 can be changed according to actual needs, and the present invention does not limit this.

Fig. 3 is a left view of the baffle assembly, as shown in Fig. 3, preferably, the sum of the projected areas of the plurality of tube holes 32 of the triangular baffle 31 on the cross section of the heat exchanger is the corresponding triangular baffle The projected area of the plate 31 on the cross-section of the heat exchanger is 30% to 40%, thereby ensuring that the triangular baffle 31 can have a larger area to act on the heat exchange fluid, thereby improving the reliability of the heat exchanger.

In this embodiment, each triangular baffle 31 includes a first side 311, a second side 312, an outer arc 313 and an inner arc 314, and the first sides of each triangular baffle 31 are respectively connected to The included angle between the second sides of the nearest triangular baffles 31 is 15° to 90°, thereby limiting the arrangement of the triangular baffles 31, that is, the distance between two triangular baffles 31, In turn, the flow rate of the heat exchange fluid is controlled.

Preferably, the inner arc edge 314 of the triangular baffle 31 is provided with a depression, and the depression on the triangular baffle 31 of the same baffle assembly 3 forms a central hole 33 on the cross section of the heat exchanger, and the center hole 33 The diameter is 1 to 2 times the diameter of the pipe hole 32 . In the above implementation mode, when the heat exchanger is in operation, a small part of the heat exchange fluid can flow between the shell 1 and the heat transfer tube bundle 2 through the central hole 33 to achieve the effect of splitting, thereby reducing the heat exchange fluid folding The impact of the flow plate assembly 3 further reduces the vibration of the heat exchanger.

Specifically, a plurality of pull rods (not shown) for supporting the triangular baffle 31 are installed in the shell 1, and the two ends of each pull rod are respectively fixedly installed on the two ends of the tube sheet 4 and aligned with the longitudinal direction of the shell 1. Arranged in parallel, each triangular baffle 31 is respectively set outside the respective corresponding tie rods, and a distance tube (not shown) corresponding to the tie rods is provided between every two adjacent triangular baffles 31, three The spacer tubes are located at the arc top of the outer arc edge 313, the middle of the first side 311 and the middle of the second side 312, and each spacer tube is set outside the corresponding pull rod, and the spacer tube and the housing The length direction of 1 is parallel, and the length of the spacer tube can be equal to the distance between two adjacent triangular baffles 31 arranged at intervals along the length direction of the housing 1, thereby limiting the distance between the triangular baffles 31 in the housing 1. spacing along the length.

In this embodiment, both ends of the shell 1 are respectively connected to the tube box 5 through the tube sheet, one end of the heat transfer tube bundle 2 communicates with one tube box 5, and the other end of the heat transfer tube bundle 2 communicates with another tube box 5, The tube side outlet 51 and the tube side inlet 52 are respectively provided on the two tube boxes, and the tube side outlet 51 and the tube side inlet 52 communicate with the heat transfer tube bundle 2 through the respective tube boxes 5, thereby forming the heat transfer tube bundle 2 Circulation of the heat exchange fluid inside.

In this embodiment, a shell side outlet 11 and a shell side inlet 12 are respectively provided on the outer peripheral walls of the two ends of the housing 1, and the shell side outlet 11 and the shell side inlet 12 are connected, thereby forming a gap between the housing and the heat transfer tube bundle 2. Circulation of the heat exchange fluid.

In this embodiment, the heat transfer tube bundle 2 includes a plurality of heat transfer tubes 21, and each heat transfer tube 21 is inserted into a corresponding tube hole 32, and each heat transfer tube is arranged in parallel to each other, thereby improving the heat transfer efficiency of the heat exchanger. Thermal efficiency. It is worth noting that the number of heat transfer tubes 21 needs to correspond to the overall design of the heat exchanger. In other embodiments, the number of heat transfer tubes 21 can vary according to actual needs, which is not limited by the present invention.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (9)

1. A shell-and-tube heat exchanger, the heat exchanger comprising: a shell, a heat transfer tube bundle and a plurality of baffle assemblies, the heat transfer tube bundle and the plurality of baffle assemblies are installed on the In the casing, the plurality of baffle assemblies are arranged at equal intervals along the length direction of the casing, and it is characterized in that each of the baffle assemblies includes a plurality of triangular baffles arranged in a spiral structure , each of the triangular baffles is provided with a plurality of tube holes, and the heat transfer tube bundle is inserted into the baffle assembly through the corresponding tube holes; Each of the triangular baffles is a curved plate member, and the curvature of each of the triangular baffles is 0.5 to 1.5 times the inner diameter of the housing. 2. The heat exchanger according to claim 1, wherein the sum of the projected areas of the plurality of tube holes of the triangular baffle on the cross section of the heat exchanger is the corresponding The projected area of the triangular baffle on the cross section of the heat exchanger is 30% to 40%. 3. The heat exchanger according to claim 1, wherein each of the triangular baffles includes a first side, a second side, an outer arc and an inner arc, and each of the triangular baffles The included angles between the first side of the baffle and the second side of the closest triangular baffle are 15° to 90°. 4. The heat exchanger according to claim 3, characterized in that, the inner arc edge of the triangular baffle is provided with a depression, and the same on the triangular baffle of the baffle assembly The depression forms a central hole on the cross section of the heat exchanger, and the diameter of the central hole is 1 to 2 times the diameter of the tube hole. 5. The heat exchanger according to claim 3, wherein a plurality of pull rods for supporting the triangular baffles are installed in the housing, and the two ends of each of the pull rods are respectively fixed on the The tube plates at both ends of the heat exchanger are arranged parallel to the length direction of the shell, each of the triangular baffles is respectively set outside the corresponding tie rods, and every two adjacent triangular baffles There are spacer tubes that correspond to the pull rods one by one, and the three spacer tubes are respectively located at the top of the outer arc, the middle of the first side, and the second side. In the middle of the side, each of the spacer tubes is sleeved on the respective corresponding pull rods, and the spacer tubes are parallel to the length direction of the housing. 6. The heat exchanger according to claim 5, wherein both ends of the housing are respectively connected to a tube box through the tube sheet, one end of the heat transfer tube bundle communicates with one of the tube boxes, The other end of the heat transfer tube bundle communicates with the other tube box, and the two tube boxes are respectively provided with a tube pass outlet and a tube pass inlet, and the tube pass outlet and the tube pass inlet pass through their respective The corresponding tube box communicates with the heat transfer tube bundle. 7 . The heat exchanger according to claim 1 , wherein a shell-side outlet and a shell-side inlet are respectively provided on the peripheral walls at both ends of the shell, and the shell-side outlet and the shell-side inlet are connected. 8. The heat exchanger according to claim 1, wherein the heat transfer tube bundle includes a plurality of heat transfer tubes, and each of the heat transfer tubes is inserted into the corresponding tube holes, and each of the heat transfer tubes The heat transfer tubes are arranged parallel to each other. 9. The heat exchanger according to any one of claims 1-8, wherein the baffle assembly is a carbon steel member or a stainless steel member.