Large heat exchanger allowing fluid to efficiently flow

Abstract

The utility model relates to the field of chemical engineering, and provides a large-scale heat exchanger for high-efficiency flowing of fluid, which comprises a barrel body, a plurality of through hole ring belts are arranged on the barrel body, a sealed refrigerant collecting box is arranged on the outer sides of the through hole ring belts, and the refrigerant collecting box is provided with a refrigerant inlet for inputting refrigerant; and a plurality of full-circle distribution plates with flower-shaped holes are arranged in the cylinder body. The heat exchanger has the advantages that fluid is evenly distributed in the heat exchanger, and therefore the even heat exchange effect without a dead zone is achieved. The design is particularly suitable for occasions needing high-precision heat exchange. Therefore, by means of the design, the heat exchange effect of the occasions can be effectively improved, and the heat exchange effect is more remarkable.

Description

Technical Field

[0001] The utility model relates to the field of chemical equipment, in particular to a large-scale heat exchanger with efficient fluid flow. Background Art

[0002] In modern industrial production, heat exchangers are increasingly used. Their main function is to exchange heat through the fluid inside and outside the tube bundle to achieve the purpose of cooling or heating. In order to improve the heat exchange efficiency, baffles are usually installed inside the heat exchanger. These baffles are generally arched or disc-shaped annular flat plates, installed in the shell, and perpendicular to the tube bundle.

[0003] The main function of the baffle is to guide the shell-side fluid to cross the tube bundle multiple times along the prescribed path, which can increase the flow rate and turbulence, thereby improving the heat exchange efficiency. However, this design may have certain problems in some cases. For example, dead zones may occur, that is, the fluid stagnates in certain areas and cannot effectively participate in heat exchange; at the same time, the baffle may increase the flow resistance of the fluid and reduce the overall heat transfer efficiency.

[0004] Especially when the diameter of the heat exchanger is large (especially the heat exchanger with a nominal diameter greater than 3 meters), the impact of the above problems will be more obvious. Therefore, with the increasing application and large-scale application of heat exchangers, as well as in some fields with high-precision heat transfer requirements and long heat exchange tubes, the general baffle form can no longer meet the process requirements.

[0005] In order to solve these problems, we need a new type of efficient fluid distribution structure. This structure can ensure uniform fluid flow and avoid dead zones. It also has more advantages, such as reducing flow resistance and improving heat transfer efficiency, effectively improving and enhancing the heat transfer effect of the heat exchanger and meeting higher process requirements. Utility Model Content

[0006] Aiming at the shortcomings of existing technologies, the problem of dead zone and large resistance in flow, which affects the heat transfer efficiency of heat exchangers, is solved;

[0007] The utility model provides a large-scale heat exchanger with efficient fluid flow, comprising a cylinder, a plurality of through-hole rings are arranged on the cylinder, a sealed refrigerant header is arranged outside the through-hole rings, and the refrigerant header is provided with a refrigerant inlet for inputting refrigerant;

[0008] A plurality of full-circle distribution plates with flower-shaped holes are arranged inside the cylinder.

[0009] Furthermore, a material inlet is arranged at one end of the cylinder, a material outlet is arranged at the other end, and a heat exchange tube is fixedly arranged in the middle through a tube sheet.

[0010] Furthermore, a refrigerant outlet is provided on the side of the cylinder.

[0011] Furthermore, the through hole ring is arranged between two adjacent distribution plates.

[0012] As a preferred solution, the total flow area of ​​the openings of the distribution plate is not less than 1.6 to 2.0 times the total flow area of ​​the openings of the refrigerant inlet.

[0013] Furthermore, the through-hole distribution density of the distribution plate increases from the periphery to the center.

[0014] As a preferred solution, the distribution plate is divided into three areas, from inside to outside: central area, middle area and edge area. The hole flow area of ​​the central area is 1.3-1.7 times that of the middle area, and the hole flow area of ​​the middle area is 1.8-2.2 times that of the edge area.

[0015] As a preferred solution, the distribution plates are symmetrically distributed along the center of the cylinder.

[0016] The beneficial effects of the utility model are:

[0017] 1. The design concept of the utility model is to make the fluid evenly distributed inside the heat exchanger, so as to achieve a uniform heat exchange effect without dead zones. This design is particularly suitable for occasions that require high-precision heat exchange. Therefore, the design of the utility model can effectively improve the heat exchange effect in these occasions, making it more significant.

[0018] 2. Another advantage of the utility model is that it can reduce the flow resistance of the fluid inside the heat exchanger. This is because by optimizing the flow path and distribution of the fluid, the fluid can pass through the tube bundle more smoothly, thereby reducing the flow resistance and making the pressure drop loss smaller. This can not only improve the heat exchange efficiency, but also save energy and reduce production costs, which is in line with the current development trend of green, environmental protection and energy saving.

[0019] 3. The utility model can also reduce the vibration effect of the original notch area. During the operation of the heat exchanger, due to the impact of the fluid and the vibration of the tube bundle, a large stress may be generated in the notch area, thereby affecting the stability and service life of the heat exchanger. Therefore, the design of the utility model can effectively reduce the impact of such vibration and improve the stability and service life of the heat exchanger. In addition, under the condition of the same plate spacing, the utility model can use thinner manufacturing materials to support the heat exchange tubes, which can not only save materials and reduce costs, but also improve the heat conduction efficiency of the heat exchanger and further improve the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings.

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 This is a schematic diagram of the regional distribution and refrigerant flow of the distribution plate of the utility model.

[0023] Figure 3 It is a schematic diagram of the refrigerant flow of the heat exchange tube of the utility model.

[0024] The reference numerals in the accompanying drawings are:

[0025] 1. Material inlet, 3. Tube sheet, 4. Refrigerant inlet, 5. Distribution plate, 6. Cylinder, 7. Heat exchange tube, 8. Refrigerant header, 9. Refrigerant outlet, 11. Material outlet. DETAILED DESCRIPTION

[0026] To illustrate the features of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0027] Embodiment 1:

[0028] refer to Figures 1 to 3 This embodiment provides a large heat exchanger with efficient fluid flow, which solves the problem of inconvenient transportation of workpieces in a narrow space; this embodiment includes a cylinder 6, one end of the cylinder 6 is provided with a material inlet 1, the other end is provided with a material outlet 11, the middle part is provided with a heat exchange tube 7 fixed by a tube sheet 3, and the side of the cylinder 6 is provided with a refrigerant outlet 9.

[0029] In order to make the refrigerant more evenly distributed in the cylinder, the present embodiment sets a plurality of through-hole annular belts on the cylinder 6, and a plurality of full-circle distribution plates 5 with flower-shaped holes are set inside the cylinder 6. The notch-type baffle is replaced by a full-circle flower-shaped hole-type distribution plate 5. At this time, the fluid will form an axial flow along the axis of the equipment, changing the radial deflection mode of the original notch-type baffle. After the shell-side fluid flows through the orifice plate, jet phenomenon and secondary flow phenomenon will occur, which aggravates the disturbance of the shell-side fluid near the tube wall, thins and destroys the liquid boundary layer on the tube wall surface, and achieves the purpose of enhancing heat transfer. The through-hole annular belt is arranged between two adjacent distribution plates 5, and a sealed refrigerant header 8 is arranged on the outside of the through-hole annular belt. The refrigerant header 8 is provided with a refrigerant inlet 4 to input the refrigerant. After the refrigerant is input, it enters the cylinder through the through-hole annular belt and diffuses into the cylinder through the distribution plate 5;

[0030] In order to ensure that the fluid flow can achieve a uniform heat exchange effect without dead zones, the distribution plate 5 is divided into three areas in this embodiment, which are: the central area, the middle area and the edge area from the inside to the outside. The through-hole distribution density of the distribution plate 5 increases from the periphery to the center. The hole flow area of ​​the central area is 1.5 times that of the middle area, and the hole flow area of ​​the middle area is 2 times that of the edge area. At the same time, in order to ensure the flow efficiency of the distribution plate 5, the total flow area of ​​the openings of the distribution plate 5 is not less than 1.8 times the total flow area of ​​the openings of the refrigerant inlet 4.

[0031] Embodiment 2:

[0032] refer to Figures 1 to 3 This embodiment provides a large heat exchanger with efficient fluid flow, which solves the problem of inconvenient transportation of workpieces in a narrow space; this embodiment includes a cylinder 6, one end of the cylinder 6 is provided with a material inlet 1, the other end is provided with a material outlet 11, the middle part is provided with a heat exchange tube 7 fixed by a tube sheet 3, and the side of the cylinder 6 is provided with a refrigerant outlet 9.

[0033] In order to make the refrigerant more evenly distributed in the cylinder, the present embodiment sets a plurality of through-hole annular belts on the cylinder 6, and a plurality of full-circle distribution plates 5 with flower-shaped holes are set inside the cylinder 6. The notch-type baffle is replaced by a full-circle flower-shaped hole-type distribution plate. At this time, the fluid will form an axial flow along the axis of the equipment, changing the radial deflection mode of the original notch-type baffle. After the shell-side fluid flows through the orifice plate, jet phenomenon and secondary flow phenomenon will occur, which aggravates the disturbance of the shell-side fluid near the tube wall, thins and destroys the liquid boundary layer on the tube wall surface, and achieves the purpose of enhancing heat transfer. The through-hole annular belt is arranged between two adjacent distribution plates 5, and a sealed refrigerant header 8 is arranged on the outside of the through-hole annular belt. The refrigerant header 8 is provided with a refrigerant inlet 4 to input the refrigerant. After the refrigerant is input, it enters the cylinder through the through-hole annular belt and diffuses into the cylinder through the distribution plate 5;

[0034] In order to ensure that the fluid flow can achieve a uniform heat exchange effect without dead zones, the distribution plate 5 is divided into three areas in this embodiment, which are: the central area, the middle area and the edge area from the inside to the outside. The through-hole distribution density of the distribution plate 5 increases from the periphery to the center. The hole flow area of ​​the central area is 1.7 times that of the middle area, and the hole flow area of ​​the middle area is 2.2 times that of the edge area. At the same time, in order to ensure the flow efficiency of the distribution plate 5, the total flow area of ​​the openings of the distribution plate 5 is not less than 2 times the total flow area of ​​the openings of the refrigerant inlet 4.

[0035] In addition, in this embodiment, the distribution plates 5 are symmetrically distributed along the center of the cylinder 6 to increase the degree of turbulence, thereby achieving a higher heat transfer effect.

[0036] The above embodiments and drawings are only used to illustrate the technical solution of the utility model, and are not intended to limit the utility model. The utility model is described in detail with reference to the preferred embodiments. It should be understood by ordinary technicians in this field that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the utility model do not deviate from the purpose of the utility model and should also fall within the scope of protection of the claims of the utility model. Other related technical structures not fully disclosed in the utility model are prior art in the field.

Claims

1. A large heat exchanger for efficient fluid flow, comprising a cylinder (6), characterized in that: A plurality of through-hole annular bands are arranged on the cylinder (6), a sealed refrigerant header (8) is arranged outside the through-hole annular bands, and the refrigerant header (8) is provided with a refrigerant inlet (4) for inputting refrigerant; A plurality of full-circular distribution plates (5) with flower-shaped holes are arranged inside the cylinder (6).

2. The large-scale heat exchanger with efficient fluid flow according to claim 1, characterized in that: The cylinder (6) is provided with a material inlet (1) at one end and a material outlet (11) at the other end, and a heat exchange tube (7) is fixedly arranged in the middle through a tube sheet (3).

3. The large-scale heat exchanger with efficient fluid flow according to claim 1, characterized in that: A refrigerant outlet (9) is provided on the side of the cylinder (6).

4. The large-scale heat exchanger with efficient fluid flow according to claim 1, characterized in that: The through hole annular band is arranged between two adjacent distribution plates (5).

5. The large-scale heat exchanger with efficient fluid flow according to claim 1, characterized in that: The total flow area of ​​the openings of the distribution plate (5) is not less than 1.6 to 2.0 times the total flow area of ​​the openings of the refrigerant inlet (4).

6. The large-scale heat exchanger with efficient fluid flow according to claim 1, characterized in that: The through-hole distribution density of the distribution plate (5) increases from the periphery to the center.

7. The large-scale heat exchanger with efficient fluid flow according to claim 6, characterized in that: The distribution plate (5) is divided into three areas, from the inside to the outside: a central area, a middle area and an edge area. The hole flow area of ​​the central area is 1.3-1.7 times that of the middle area, and the hole flow area of ​​the middle area is 1.8-2.2 times that of the edge area.

8. The large-scale heat exchanger with efficient fluid flow according to claim 1, characterized in that: The distribution plates (5) are symmetrically distributed along the center of the cylinder (6).

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