Through type efficient exhaust vertical heat exchanger

Abstract

The utility model relates to the technical field of petrochemical equipment, in particular to a penetrating type efficient exhaust vertical heat exchanger which comprises an upper box body, an upper tube plate, a shell pass barrel, a plurality of heat exchange tubes, a lower tube plate and a lower box body, and a shell pass space is defined by the upper tube plate, the lower tube plate and the shell pass barrel. An upper tube pass space is defined by the upper box body and the upper tube plate, and a lower tube pass space is defined by the lower box body and the lower tube plate. A plurality of upper exhaust holes are transversely formed in the upper tube plate in a penetrating mode at intervals, the upper tube plate is further provided with a plurality of upper air passing holes communicating with the shell pass space and the upper exhaust holes, and the upper air passing holes are distributed in the length direction of the upper exhaust holes at intervals; a plurality of lower exhaust holes are transversely formed in the lower tube plate in a penetrating mode, the lower tube plate is further provided with a plurality of lower air passing holes communicating with the shell pass space and the lower exhaust holes, and the lower air passing holes are distributed in the length direction of the lower exhaust holes at intervals. Compared with the prior art, exhaust is more timely, overheating of the bottom of the upper tube plate / the bottom of the lower tube plate is more efficiently avoided, and therefore the service life of the heat exchanger is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical equipment, and particularly relates to a vertical heat exchanger with through-type efficient exhaust. Background Technique

[0002] A heat exchanger is an indispensable device for realizing heat exchange and transfer in the chemical production process. The shell-and-tube heat exchanger is the most widely used heat exchange device in industrial applications, and the vertical tube-type heat exchanger is widely used in industrial production.

[0003] The heat exchanger includes an upper tube box, an upper tube sheet, a shell, a plurality of heat exchange tubes, a lower tube sheet and a lower tube box. The upper tube sheet and the lower tube sheet are respectively fixed at both ends of the shell to enclose a shell-side space; the upper tube box is fixed to the upper tube sheet and they jointly enclose an upper tube-side space, and the lower tube box is fixed to the lower tube sheet and they jointly enclose a lower tube-side space; both ends of the plurality of heat exchange tubes are respectively fixed to the upper tube sheet and the lower tube sheet, and are respectively communicated with the upper tube-side space and the lower tube-side space. When in use, the high-temperature fluid flows from the lower tube box through the heat exchange tubes to the upper tube box. A cooling medium is filled in the shell-side space, and the cooling medium continuously enters from the inlet and exits from the outlet. The cooling medium contains gas inclusions, which will cause the gas inclusions to continuously accumulate in the shell-side space and accumulate on the bottom surface of the upper tube sheet. Among them, the gas inclusions will adhere to the bottom surface of the upper tube sheet and then slowly gather into large bubbles. If these bubbles are not discharged, it will affect the heat exchange between the bottom surface of the upper tube sheet and the cooling medium, reduce the heat dissipation effect, especially at the connection between the bottom of the upper tube sheet and the heat exchange tubes, causing local overheating. In the long run, the overheated position is prone to corrosion, shortening the service life of the heat exchanger.

[0004] Chinese patent document with the application number CN202021042096.5 discloses a heat exchanger for preventing gas-phase thermal resistance in the shell side. The bottom surface of the upper tube sheet is in the shape of an arc-shaped arch protrusion, or a conical protrusion, or an inclined plane. An exhaust hole is opened inside the upper tube sheet. One end of the exhaust hole is communicated with the high position of the bottom surface of the upper tube sheet, and the other end of the exhaust hole is communicated to the outside of the upper tube sheet and is connected with an exhaust pipe. When needed, the exhaust pipe is opened, and the bubbles adhering to the bottom surface of the upper tube sheet climb from the low position to the high position along the bottom surface of the upper tube sheet by their own buoyancy and finally are discharged from the exhaust pipe, avoiding excessive bubble medium covering the bottom surface of the upper tube sheet, and thus avoiding local overheating damage to the bottom surface of the upper tube sheet, so the service life of the heat exchanger can be prolonged.

[0005] The above exhaust structure realizes exhaust by relying on the inclined surface of the upper tube sheet and the exhaust holes opened on the side of the tube sheet, and optimizes the exhaust of the shell side of the shell-and-tube heat exchanger to a certain extent. In actual application, the bubbles climb along the inclined surface. If there are more bubbles generated due to intense heat exchange, the continuous bubbles queue up and climb, and there is still a layer of bubble medium left at the bottom of the upper tube sheet. Summary of the Invention

[0006] In view of the above technical problems in the prior art, the present utility model provides a vertical heat exchanger with a through-type high-efficiency exhaust structure.

[0007] To achieve the above object, the present utility model provides the following technical solutions:

[0008] There is provided a vertical heat exchanger with a through-type high-efficiency exhaust structure, including an upper box body, an upper tube sheet, a shell-side cylinder body, a plurality of heat exchange tubes, a lower tube sheet and a lower box body. The upper tube sheet and the lower tube sheet are respectively fixed at both ends of the shell-side cylinder body to enclose a shell-side space. The shell-side cylinder body is provided with a shell-side medium inlet pipe and a shell-side medium outlet pipe communicating with the shell-side space. The upper box body is fixed to the upper tube sheet to enclose an upper tube-side space, and the lower box body is fixed to the lower tube sheet to form a lower tube-side space. A plurality of heat exchange tubes are arranged in the shell-side space, and both ends thereof respectively penetrate through the upper tube sheet to communicate with the upper tube-side space and penetrate through the lower tube sheet to communicate with the lower tube-side space. The characteristics are as follows:

[0009] The upper tube sheet is transversely penetrated with a plurality of upper exhaust holes arranged at intervals, and the upper tube sheet is further provided with a plurality of upper air passing holes communicating the shell-side space and each upper exhaust hole. The plurality of upper air passing holes are spaced apart along the length direction of each upper exhaust hole; and / or:

[0010] The lower tube sheet is transversely penetrated with a plurality of lower exhaust holes arranged at intervals, and the lower tube sheet is further provided with a plurality of lower air passing holes communicating the shell-side space and each lower exhaust hole. The plurality of lower air passing holes are spaced apart along the length direction of each lower exhaust hole.

[0011] Preferably, between the upper exhaust holes and the tube holes arranged for the heat exchange tubes to penetrate through the upper tube sheet / between the lower exhaust holes and the tube holes arranged for the heat exchange tubes to penetrate through the lower tube sheet: they are staggered.

[0012] Preferably, the upper air passing holes / the lower air passing holes are round holes, oval holes, polygonal holes or tapered holes with a reduced diameter upwards.

[0013] Preferably, the upper exhaust holes / the lower exhaust holes are round holes, oval holes or polygonal holes.

[0014] Preferably, between the plurality of upper exhaust holes / between the plurality of lower exhaust holes, they are arranged side by side.

[0015] Preferably, an exhaust manifold is provided on the outer side of the upper tube sheet / the lower tube sheet, and the plurality of upper exhaust holes / the plurality of lower exhaust holes are converged and communicated to the exhaust manifold.

[0016] Preferably, an expansion joint is provided on the side wall of the shell-side cylinder body.

[0017] Preferably, the center lines of the upper air passing holes / the lower air passing holes are arranged parallel to the axis of the shell-side cylinder body.

[0018] Preferably, exhaust connection pipes are provided at both ends of the upper exhaust holes / the lower exhaust holes.

[0019] Preferably, the center line of the upper vent hole / lower vent hole is arranged obliquely with respect to the axis of the shell side cylinder and is inclined towards the exhaust connection pipe it approaches.

[0020] Advantages of the present utility model:

[0021] In the vertical heat exchanger with through - type high - efficiency exhaust of the present utility model, when upper exhaust holes and upper vent holes are provided on the upper tube sheet, during use, the bubbles located at the top of the shell side space can timely enter the upper exhaust holes through the upper vent holes and be discharged; when lower exhaust holes and lower vent holes are provided on the lower tube sheet, similarly, the bubbles at the top of the lower tube side space during use can timely enter the lower exhaust holes through the lower vent holes and be discharged. Compared with the prior art, the exhaust is more timely and efficient, avoiding overheating at the bottom of the upper tube sheet / lower tube sheet, thereby prolonging the service life of the heat exchanger. Description of the drawings

[0022] Figure 1 It is a schematic structural diagram of a vertical heat exchanger with through - type high - efficiency exhaust in the embodiment.

[0023] Figure 2 It is a perspective view of the upper tube sheet in the embodiment, and the structure of the lower tube sheet is the same as it.

[0024] Figure 3 It is a three - dimensional view of the upper tube sheet in the embodiment.

[0025] Figure 4 It is a sectional view of the upper tube sheet in the embodiment.

[0026] Reference numerals:

[0027] Upper box body 1, upper tube sheet 2, upper exhaust hole 21, upper vent hole 22, shell side cylinder 3, heat exchange tube 4, lower tube sheet 5, lower exhaust hole 51, lower vent hole 52, lower box body 6, shell side space 7, shell side medium inlet pipe 8, shell side medium outlet pipe 9, upper tube side space 10, lower tube side space 11, expansion joint 12, exhaust connection pipe 13. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0029] A vertical heat exchanger with through - type high - efficiency exhaust in this embodiment, as Figures 1 to 4As shown in the figure, it includes an upper box body 1, an upper tube sheet 2, a shell-side cylinder 3, a plurality of heat exchange tubes 4, a lower tube sheet 5 and a lower box body 6. The upper tube sheet 2 and the lower tube sheet 5 are respectively fixed at both ends of the shell-side cylinder 3 to enclose a shell-side space 7. The shell-side cylinder 3 is provided with a shell-side medium inlet tube 8 and a shell-side medium outlet tube 9 that communicate with the shell-side space 7. The upper box body 1 is fixed to the upper tube sheet 2 to enclose an upper tube-side space 10, and the lower box body 6 is fixed to the lower tube sheet 5 to form a lower tube-side space 11. A plurality of heat exchange tubes 4 are arranged in the shell-side space 7, and both ends thereof respectively penetrate through the upper tube sheet 2 to communicate with the upper tube-side space 10 and penetrate through the lower tube sheet 5 to communicate with the lower tube-side space 11.

[0030] The upper tube sheet 2 is transversely perforated with a plurality of upper exhaust holes 21 arranged at intervals. The upper tube sheet 2 is further provided with a plurality of upper through holes 22 that communicate the shell-side space 7 and each upper exhaust hole 21. The plurality of upper through holes 22 are spaced apart along the length direction of each upper exhaust hole 21.

[0031] The lower tube sheet 5 is transversely perforated with a plurality of lower exhaust holes 51 arranged at intervals. The lower tube sheet 5 is further provided with a plurality of lower through holes 52 that communicate the shell-side space 7 and each lower exhaust hole 51. The plurality of lower through holes 52 are spaced apart along the length direction of each lower exhaust hole 51.

[0032] During use, the bubbles located at the top of the shell-side space 7 enter the upper exhaust holes 21 from the upper through holes 22 in a timely manner and are discharged. Similarly, during use, the bubbles at the top of the lower tube-side space 11 can enter the lower exhaust holes 51 from the lower through holes 52 in a timely manner. Compared with the prior art, the exhaust is more timely and efficient, avoiding overheating at the bottom of the upper tube sheet 2 and the bottom of the lower tube sheet 5, thereby prolonging the service life of the heat exchanger.

[0033] It can be understood that in this embodiment, exhaust holes and through holes are respectively provided on both the upper tube sheet 2 and the lower tube sheet 5. In practice, according to needs, exhaust holes and through holes can be provided only on one of them.

[0034] In this embodiment, between the upper exhaust holes 21 and the tube holes arranged for the heat exchange tubes 4 to penetrate through the upper tube sheet 2, and between the lower exhaust holes 51 and the tube holes arranged for the heat exchange tubes 4 to penetrate through the lower tube sheet 5: they are staggered, that is, a row of tube holes, an upper exhaust hole 21 / lower exhaust hole 51, a row of tube holes circulate and stagger in this way. The tube holes are not shown in the figure.

[0035] In practice, for the cross-sectional shape of the upper through holes 22 / lower through holes 52, it can be a round hole, an oval hole, a polygonal hole or a tapered hole with a reduced diameter upwards.

[0036] In practice, for the cross-sectional shape of the upper exhaust holes 21 / lower exhaust holes 51, it can be a round hole, an oval hole or a polygonal hole.

[0037] In this embodiment, the multiple upper exhaust holes 21 are arranged side by side with each other, and the multiple lower exhaust holes 51 are also arranged side by side with each other.

[0038] In practice, an exhaust manifold (not shown in the figure) can be provided outside the upper tube sheet 2 / lower tube sheet 5. The multiple upper exhaust holes 21 / multiple lower exhaust holes 51 are connected to the exhaust manifold in a converging manner. The gas flowing out of the multiple upper exhaust holes 21 on the upper tube sheet 2 converges in the same exhaust manifold, and the gas flowing out of the multiple lower exhaust holes 51 on the lower tube sheet 5 converges in another exhaust manifold.

[0039] In this embodiment, an expansion joint 12 is provided on the side wall of the shell-side cylinder 3.

[0040] In this embodiment, exhaust connection pipes 13 are provided at both ends of the upper exhaust holes 21 / lower exhaust holes 51. The center lines of the upper through holes 22 / lower through holes 52 are arranged parallel to the axis of the shell-side cylinder 3.

[0041] In practice, it can be changed to that the center lines of the upper through holes 22 / lower through holes 52 are arranged obliquely with respect to the axis of the shell-side cylinder 3 and are inclined towards the exhaust connection pipe 13 they are close to. Taking the upper through hole 22 as an example, with the axis of the shell-side cylinder 3 as the dividing line, Figure 1 the upper through hole 22 on the left in the middle is inclined to the left, and the upper through hole 22 on the right is inclined to the right. The function is that the gas in the upper through hole 22 promotes the gas flow out of the upper exhaust hole 21.

[0042] In the description of the present invention, it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention usually described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the above detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention claimed, but only represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

Claims

1. A vertical heat exchanger with through-type high-efficiency exhaust, comprising an upper box (1), an upper tube sheet (2), a shell-side cylinder (3), a plurality of heat exchange tubes (4), a lower tube sheet (5) and a lower box (6), wherein the upper tube sheet (2) and the lower tube sheet (5) are respectively fixed to the two ends of the shell-side cylinder (3) to enclose a shell-side space (7), and the shell-side cylinder (3) is provided with a shell-side medium inflow tube (8) and a shell-side medium outflow tube (9) connected to the shell-side space (7); the upper box (1) and the upper tube sheet (2) are fixed to enclose an upper tube-side space (10), and the lower box (6) and the lower tube sheet (5) are fixed to form a lower tube-side space (11); a plurality of heat exchange tubes (4) are arranged in the shell-side space (7), and the two ends of the heat exchange tubes are respectively penetrated through the upper tube sheet (2) to connect to the upper tube-side space (10), and penetrated through the lower tube sheet (5) to connect to the lower tube-side space (11); the characteristics are: The upper tube plate (2) is provided with a plurality of upper exhaust holes (21) arranged at intervals and extending transversely therethrough, and the upper tube plate (2) is further provided with a plurality of upper through holes (22) connecting the shell-side space (7) and each of the upper exhaust holes (21), and the plurality of upper through holes (22) are distributed at intervals along the length direction of each of the upper exhaust holes (21); and / or: The lower tube plate (5) is provided with a plurality of lower exhaust holes (51) arranged at intervals and extending transversely therethrough. The lower tube plate (5) is also provided with a plurality of lower air holes (52) connecting the shell-side space (7) and the lower exhaust holes (51). The plurality of lower air holes (52) are distributed at intervals along the length direction of the lower exhaust holes (51).

2. A vertical heat exchanger with through-type high-efficiency exhaust according to claim 1, characterized in that: The upper exhaust holes (21) and the arranged tube holes of the upper tube plate (2) through which the heat exchange tubes (4) pass / the lower exhaust holes (51) and the arranged tube holes of the lower tube plate (5) through which the heat exchange tubes (4) pass are arranged in a staggered distribution.

3. A vertical heat exchanger with through-type high-efficiency exhaust according to claim 1, characterized in that: The upper air hole (22) / lower air hole (52) is a circular hole, an elliptical hole, a polygonal hole or a tapered hole with a diameter that decreases upward.

4. A vertical heat exchanger with through-type high-efficiency exhaust according to claim 1, characterized in that: The upper exhaust hole (21) / lower exhaust hole (51) is a circular hole, an elliptical hole or a polygonal hole.

5. The vertical heat exchanger with through-type high-efficiency exhaust according to claim 1 is characterized in that: The plurality of upper exhaust holes (21) and the plurality of lower exhaust holes (51) are distributed in parallel with each other.

6. A vertical heat exchanger with through-type high-efficiency exhaust according to claim 1, characterized in that: An exhaust manifold is arranged on the outer side of the upper tube plate (2) / lower tube plate (5), and a plurality of upper exhaust holes (21) / a plurality of lower exhaust holes (51) are converged and connected to the exhaust manifold.

7. A vertical heat exchanger with through-type high-efficiency exhaust according to claim 1, characterized in that: An expansion joint (12) is provided on the side wall of the shell-side cylinder (3).

8. The vertical heat exchanger with through-type high-efficiency exhaust according to claim 1 is characterized in that: The center line of the upper air hole (22) / lower air hole (52) is arranged parallel to the axis of the shell-side cylinder (3).

9. A vertical heat exchanger with through-type high-efficiency exhaust according to claim 1, characterized in that: Exhaust pipes (13) are provided at both ends of the upper exhaust hole (21) / lower exhaust hole (51).

10. A vertical heat exchanger with through-type high-efficiency exhaust according to claim 9, characterized in that: The center line of the upper air hole (22) / lower air hole (52) is arranged obliquely relative to the axis of the shell-side cylinder (3), and is inclined toward the exhaust pipe (13) close to it.

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