Novel flow guide anti-scour structure of heat exchanger

Abstract

The utility model belongs to the technical field of heat exchanger anti-scour structure design, and particularly relates to a novel flow guide anti-scour structure of a heat exchanger, which comprises a shell and a shell pass fluid inlet, the outer side wall of the shell is connected with a buffer sleeve, and the shell pass fluid inlet is arranged on the side wall of the buffer sleeve. A plurality of strip-shaped through holes are formed in the side wall, located in the buffer sleeve, of the shell, the trend of each strip-shaped through hole is consistent with that of the shell, and each strip-shaped through hole is formed in the side opposite to the shell pass fluid inlet. According to the novel flow guide anti-scour structure of the heat exchanger, high-speed shell pass fluid flowing into the shell pass fluid inlet can enter the shell through the strip-shaped through holes in the opposite direction after being buffered by a certain distance along the buffer sleeve, the shell pass fluid is effectively prevented from scouring the heat exchange tubes, and operation is safe and reliable; and moreover, the arrangement space of the heat exchange tubes is not occupied, and the heat exchange tubes can be fully arranged, so that the effective heat exchange area is prevented from being reduced, and the heat exchange efficiency is ensured.

Description

Technical Field

[0001] The utility model relates to a novel flow-guiding and anti-impact structure of a heat exchanger, belonging to the technical field of heat exchanger anti-impact structure design. Background Art

[0002] As a heat exchange equipment, heat exchangers play an important role in the petrochemical industry, especially for industries with high energy consumption. Heat exchangers can effectively utilize heat sources and minimize heat loss. With the development of society, the advancement of science and technology, the large-scale petroleum and chemical equipment, and the increasing size of heat exchange equipment, the requirements for the structural design of heat exchangers have also been greatly increased. How to make the heat exchanger operate safely and reliably is of vital importance to users. Traditional heat exchangers do not have an anti-scouring structure. The shell-side fluid directly enters the shell through the shell-side fluid inlet, which will cause scouring and corrosion to the heat exchange tubes in the shell. At the same time, the high-speed flow of the shell-side fluid will also cause the heat exchange tubes to vibrate, affecting the service life of the heat exchange tubes.

[0003] To this end, a Chinese utility model patent with authorization announcement number CN203731926U discloses a new type of heat exchanger anti-collision plate structure. Although it can achieve anti-collision for shell-side fluid, since its anti-collision plate structure is directly installed at the shell-side fluid inlet, the shell-side fluid will directly impact the anti-collision plate structure, which is easy to cause damage to the anti-collision plate and has poor safety and reliability; and since the anti-collision plate structure is located in the shell, it will occupy the layout space of the heat exchange tubes, thereby resulting in a corresponding reduction in the number of heat exchange tubes arranged, which will lead to a reduction in the effective heat exchange area of ​​the heat exchanger, affecting the heat exchange efficiency. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a new flow-guiding and anti-collision structure for a heat exchanger which is safe and reliable in operation and does not occupy the space for arranging heat exchange tubes.

[0005] The novel flow-guiding and anti-impact structure of the heat exchanger described in the utility model comprises a shell and a shell-side fluid inlet, the outer side wall of the shell is connected with a buffer sleeve, the shell-side fluid inlet is arranged on the side wall of the buffer sleeve, and a plurality of strip through holes are opened on the side wall of the shell located in the buffer sleeve, the direction of each strip through hole is consistent with the direction of the shell, and each strip through hole is arranged on the side facing away from the shell-side fluid inlet.

[0006] Furthermore, the angle formed by the line connecting the two outermost strip-shaped through holes and the center of the shell is between 90° and 150°.

[0007] Furthermore, the middle section of the buffer sleeve is linear, the upper and lower ends of the buffer sleeve are both contracted inwardly to correspond to the outer diameter of the shell, and the upper and lower ends of the buffer sleeve are both welded to the shell.

[0008] Furthermore, an upper partition is welded between the upper contraction port of the buffer sleeve and the shell, a lower partition is welded between the lower contraction port of the buffer sleeve and the shell, and the shell-side fluid inlet is arranged between the upper partition and the lower partition.

[0009] Furthermore, an annular rib is connected to the outer side wall of the shell, and the annular rib corresponds to the shell-side fluid inlet.

[0010] Furthermore, the strip-shaped through holes are arranged in two rows, the upper row of strip-shaped through holes is arranged between the upper partition and the annular rib, and the lower row of strip-shaped through holes is arranged between the lower partition and the annular rib.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The novel flow-guiding and anti-scouring structure of the heat exchanger described in the utility model can make the high-speed shell-side fluid flowing into the shell-side fluid inlet be buffered along the buffer sleeve for a distance and then enter the shell through the strip-shaped through hole in the reverse direction, effectively preventing the shell-side fluid from scouring the heat exchange tube, and the operation is safe and reliable;

[0013] The novel flow-guiding and anti-collision structure of the heat exchanger described in the utility model does not occupy the arrangement space of the heat exchange tubes, and the heat exchange tubes can be fully arranged, thereby preventing the effective heat exchange area from being reduced and ensuring the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 Sectional view at AA in the middle;

[0016] Figure 3 It is a schematic diagram of the distribution of the strip-shaped through holes of the utility model on the shell.

[0017] In the figure: 1, shell; 2, buffer sleeve; 3, upper partition; 4, shell-side fluid inlet; 5, annular ribs; 6, lower partition; 7, strip-shaped through holes. DETAILED DESCRIPTION

[0018] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0019] Embodiment 1:

[0020] like Figures 1 to 3As shown, the novel flow-guiding and anti-impact structure of the heat exchanger described in the utility model comprises a shell 1 and a shell-side fluid inlet 4, the outer wall of the shell 1 is connected with a buffer sleeve 2, the shell-side fluid inlet 4 is arranged on the side wall of the buffer sleeve 2, and a plurality of strip through holes 7 are opened on the side wall of the shell 1 located in the buffer sleeve 2, the direction of each strip through hole 7 is consistent with the direction of the shell 1, and each strip through hole 7 is arranged on the side opposite to the shell-side fluid inlet 4.

[0021] When in use, the shell-side fluid enters the buffer sleeve 2 through the shell-side fluid inlet 4, then flows along the buffer sleeve 2 for buffering, and then enters the shell 1 through the strip through hole 7 in the opposite direction, which greatly reduces the impact force of the shell-side fluid, thereby effectively preventing the shell-side fluid from scouring the heat exchange tube, and the operation is safe and reliable.

[0022] The novel flow-guiding and anti-collision structure of the heat exchanger described in the utility model does not occupy the arrangement space of the heat exchange tubes, and the heat exchange tubes can be fully arranged, thereby preventing the effective heat exchange area from being reduced and ensuring the heat exchange efficiency.

[0023] Embodiment 2:

[0024] like Figure 1 As shown in the figure, based on Example 1,

[0025] Furthermore, the angle formed by the line between the two outermost strip-shaped through holes 7 and the center of the housing 1 is between 90° and 150°, preferably 120°;

[0026] Furthermore, the middle section of the buffer sleeve 2 is linear, the upper and lower ends of the buffer sleeve 2 are both contracted inward to correspond to the outer diameter of the shell 1, the upper and lower ends of the buffer sleeve 2 are both welded to the shell 1, and the upper and lower ends of the buffer sleeve 2 are both set to be conical and welded to the shell 1, which effectively ensures the structural strength and stability of the buffer sleeve 2;

[0027] Furthermore, an upper baffle 3 is welded between the upper contraction port of the buffer sleeve 2 and the shell 1, and a lower baffle 6 is welded between the lower contraction port of the buffer sleeve 2 and the shell 1. The shell-side fluid inlet 4 is arranged between the upper baffle 3 and the lower baffle 6. The arrangement of the upper baffle 3 and the lower baffle 6 can, on the one hand, prevent the shell-side fluid from affecting the flow due to the conical angle of entering the buffer sleeve 2, and on the other hand, further improve the structural strength of the buffer sleeve 2 to ensure safe and reliable operation;

[0028] Furthermore, a ring rib 5 is connected to the outer wall of the shell 1, and the ring rib 5 corresponds to the shell-side fluid inlet 4. The ring rib 5 can increase the structural strength of the shell 1 and play a protective role.

[0029] Furthermore, the strip through holes 7 are arranged in two rows, the upper row of strip through holes 7 is arranged between the upper partition plate 3 and the annular rib 5, and the lower row of strip through holes 7 is arranged between the lower partition plate 6 and the annular rib 5. The structural distribution is reasonable and the shell-side fluid flows smoothly.

[0030] It is particularly noted that in the description of the present invention, the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

Claims

1. A novel flow-guiding and anti-impact structure for a heat exchanger, comprising a shell (1) and a shell-side fluid inlet (4), characterized in that: The outer wall of the shell (1) is connected to a buffer sleeve (2), the shell-side fluid inlet (4) is arranged on the side wall of the buffer sleeve (2), and a plurality of strip-shaped through holes (7) are opened on the side wall of the shell (1) located in the buffer sleeve (2), the direction of each strip-shaped through hole (7) is consistent with the direction of the shell (1), and each strip-shaped through hole (7) is arranged on the side opposite to the shell-side fluid inlet (4).

2. The novel flow-guiding and anti-impact structure of the heat exchanger according to claim 1 is characterized in that: The angle formed by the line connecting the two outermost strip-shaped through holes (7) and the center of the housing (1) is between 90° and 150°.

3. The novel flow-guiding and anti-impact structure of the heat exchanger according to claim 1 or 2, characterized in that: The middle section of the buffer sleeve (2) is linear, the upper and lower ends of the buffer sleeve (2) are both contracted inwardly to correspond to the outer diameter of the shell (1), and the upper and lower ends of the buffer sleeve (2) are both welded to the shell (1).

4. The novel flow-guiding and anti-impact structure of the heat exchanger according to claim 3 is characterized in that: An upper partition (3) is welded between the upper contraction opening of the buffer sleeve (2) and the shell (1), a lower partition (6) is welded between the lower contraction opening of the buffer sleeve (2) and the shell (1), and the shell-side fluid inlet (4) is arranged between the upper partition (3) and the lower partition (6).

5. The novel flow-guiding and anti-impact structure of the heat exchanger according to claim 4 is characterized in that: An annular rib (5) is connected to the outer wall of the shell (1), and the annular rib (5) corresponds to the shell-side fluid inlet (4).

6. The novel flow-guiding and anti-impact structure of the heat exchanger according to claim 5 is characterized in that: The strip-shaped through holes (7) are arranged in two rows, upper and lower. The strip-shaped through holes (7) in the upper row are arranged between the upper partition plate (3) and the annular rib (5), and the strip-shaped through holes (7) in the lower row are arranged between the lower partition plate (6) and the annular rib (5).

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