A heat exchanger

Abstract

The utility model discloses a heat exchanger, including the tubulature, the tubulature both ends are connected with first head, second head respectively, the both ends of tubulature all are fixedly connected with the tube sheet, be provided with screen between first head with the tube sheet, be provided with the head liquid inlet on first head, install the conical filter screen at the head liquid inlet, the radius of conical filter screen gradually increases along the liquid liquid direction, and the application is filtered twice to the heat exchange medium of entering the tube bundle through setting conical filter screen and screen, greatly reduced the impurity in medium, effectively avoided the impurity and accumulated in the tube bundle, prolonged the use cycle of tube bundle.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, specifically a heat exchanger. Background Technology

[0002] In modern chemical production processes, heat exchangers, as efficient and stable heat exchange devices, can rapidly cool materials through their unique structural design and high-efficiency heat exchange performance.

[0003] However, during the use of heat exchangers, impurities in the heat exchange medium can easily form scale on the surface of the tube bundle, affecting heat exchange efficiency, reducing heat exchange capacity, and even causing the heat exchanger to be scrapped. Although existing technologies reduce the tube bundle blockage cycle through backflushing, and although periodic backflushing can flush out some impurities or particles in the fluid, impurities or particles in dead spots will slowly accumulate and return to the entire system after backflushing ends, leading to a vicious cycle. Impurities in the entire system gradually increase, affecting heat exchange efficiency and causing products to fail. Utility Model Content

[0004] The purpose of this invention is to provide a heat exchanger to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A heat exchanger includes a tube body, with a first end cap and a second end cap respectively connected to both ends of the tube body, and a tube sheet fixedly connected to both ends of the tube body, with a screen provided between the first end cap and the tube sheet; The first end cap is provided with a liquid inlet, and a conical filter screen is installed at the liquid inlet, the radius of which gradually increases along the direction of liquid inlet.

[0006] As a further embodiment of this utility model: a tube bundle is provided inside the tube body, both ends of the tube bundle are fixedly connected to the tube sheet, and both ends of the tube bundle are respectively connected to the first end cap and the second end cap through the tube sheet.

[0007] As a further embodiment of this utility model: a tube flow is provided inside the tube, and the tube flow is sealed and isolated from the first end cap and the second end cap at both ends.

[0008] As a further embodiment of this utility model: a baffle plate is provided inside the tube, and multiple baffle plates are arranged alternately. The tube body is provided with a tube body inlet and a tube body outlet, and both the tube body inlet and the tube body outlet are connected to the tube body flow inside the tube body.

[0009] As a further embodiment of this utility model: the conical filter screen is fixedly connected to the liquid inlet of the sealing head by a short circuit, and the side wall of the conical filter screen is provided with sieve holes.

[0010] As a further embodiment of this utility model: the tube sheet and the first end cap are provided with positioning pins and / or positioning holes for connecting the screen.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This application filters the heat exchange medium entering the tube bundle twice by setting a conical filter screen and a sieve screen, which greatly reduces the impurity content in the medium, effectively avoids the accumulation of impurities in the tube bundle, and extends the service life of the tube bundle. 2. In this application, the heat exchange medium first passes through a conical filter screen before entering the heat exchanger. Therefore, most impurities tend to accumulate at the front end of the conical filter screen. During the rinsing process, impurities easily fall off the conical filter screen; therefore, the conical structure facilitates backwashing. 3. The screen in this application is installed between the end cap and the tube sheet of the tube body, which facilitates maintenance and replacement. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the heat exchanger structure in this embodiment; Figure 2 This is a schematic diagram of the conical filter screen structure of the heat exchanger in this embodiment; Figure 3 This is a schematic diagram of the screen structure of the heat exchanger in this embodiment; In the figure: 1-tube body, 2-first end cap, 3-second end cap, 4-tube sheet, 5-screen, 6-tube bundle, 7-baffle plate, 8-tube body flow path, 9-tube body inlet, 10-tube body outlet, 11-end cap inlet, 12-end cap outlet, 13-conical filter screen, 14-screen hole. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1In this embodiment of the present invention, a heat exchanger includes a tube body 1, which is a cylindrical structure. Tube sheets 4 are fixedly connected to both ends of the tube body 1. Multiple through holes are provided on the tube sheets 4. A tube bundle 6 is disposed between two tube sheets 4, with both ends of the tube bundle 6 connected to the through holes on the two tube sheets 4 respectively. Therefore, the outside of the tube bundle 6 is isolated from the inside of the tube body 1. A first end cap 2 and a second end cap 3 are connected to both ends of the tube body 1, and both ends of the tube bundle 6 are connected to the spaces within the first end cap 2 and the second end cap 3 respectively. The tube bundle flow is formed through the tube body 1, which is the tube body flow 8. The tube body 1 is provided with a tube body inlet 9 and a tube body outlet 10 that are connected to the tube body flow 8. The tube body flow 8 and the tube bundle flow are isolated from each other, and the tube bundle flow passes through the tube body flow. This can isolate them from each other while allowing heat exchange. Multiple baffles 7 are provided inside the tube body 1. The multiple baffles 7 are arranged alternately on the inner wall of the tube body 1, which can increase the distance that the flow travels in the tube body 1 and increase the heat exchange time.

[0015] The first end cap 2 is a liquid inlet end cap, and the second end cap 3 is a liquid outlet end cap. A screen 5 is provided between the first end cap 2 and the tube sheet 4, and the screen 5 is located between the first end cap 2 and the tube sheet 4. Both the first end cap 2 and the tube sheet 4 are provided with positioning pins and / or positioning holes. In this embodiment, as shown... Figure 3 As shown, in this embodiment, the first end cap 2 is provided with positioning holes, and the screen is provided with positioning pins that match the positioning holes on the first end cap 2. At the same time, the tube plate 4 is also provided with positioning pins, and the screen is provided with matching positioning holes. The screen 5 is provided with positioning holes, which makes it easy to connect the screen 5. The first end cap 2 is provided with an end cap liquid inlet 11, and the second end cap 3 is provided with an end cap liquid outlet 12. The end cap liquid inlet 11 is fixedly connected to the conical filter screen 13 by a short circuit. The radius of the conical filter screen 13 gradually increases along the liquid flow direction. That is, the bottom of the conical filter screen 13 is connected to the end cap liquid inlet 11, and the conical filter screen 13 is provided with screen holes 14.

[0016] In use, when heat exchange is required, the heat exchange medium enters the first end cap 2 through the conical filter screen 13 and the end cap inlet 11 via a pipeline. During this process, the heat exchange medium undergoes a first filtration through the conical filter screen 13, and then enters the tube bundle 6 through the screen 5. During this process, the heat exchange medium undergoes a second filtration. After two filtrations, the heat exchange medium enters the tube bundle 6 and flows through the tube bundle 6 to the second end cap 3. Then, it flows out through the end cap outlet 12 on the second end cap 3 and is circulated through a circulation pipeline. At the same time, the heat exchange liquid enters the tube body flow 8 through the tube body inlet 9 and flows through the tube body flow 8 to the tube body outlet 10. During this process, the heat exchange liquid in the tube body flow 8 exchanges heat with the heat exchange medium in the tube bundle 6.

[0017] Since the heat exchange medium in this embodiment is filtered twice by the conical filter 13 and the screen 5, the impurities in the heat exchange medium entering the tube bundle 6 are basically filtered out, thus reducing the problem of impurities accumulating in the tube bundle and improving the service life of the tube bundle. When backwashing is required after a period of use, the heat exchange medium enters from the liquid outlet 12 of the end cap and then exits through the backwash port. The backwash port is located at the front end of the conical filter 13 and is installed on the liquid inlet pipe. During backwashing, the backwash port is opened, and the backwash liquid and the impurities washed down are discharged through the backwash port. Since most of the filtered impurities accumulate at the conical filter, they are all gathered at the front end of the conical filter after backwashing, making it easy to clean. In addition, the screen 5 of this application is set between the first end cap 2 and the tube sheet 4. Therefore, when it needs to be replaced, it is only necessary to remove the bolts connecting the first end cap 2 and the tube sheet 4, move the first end cap 2 a little distance, and then pull out the screen 5 for replacement, which reduces the difficulty of later maintenance.

[0018] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heat exchanger, comprising a tube body (1), characterized in that, The tube body (1) is connected to a first end cap (2) and a second end cap (3) at both ends respectively. Both ends of the tube body (1) are fixedly connected to a tube plate (4). A screen (5) is provided between the first end cap (2) and the tube plate (4). The first end cap (2) is provided with an end cap liquid inlet (11), and a conical filter screen (13) is installed at the end cap liquid inlet (11). The radius of the conical filter screen (13) gradually increases along the liquid inlet direction.

2. A heat exchanger according to claim 1, characterized in that, The tube body (1) is provided with a tube bundle (6), both ends of which are fixedly connected to the tube plate (4). The two ends of the tube bundle (6) are respectively connected to the first end cap (2) and the second end cap (3) through the tube plate (4).

3. A heat exchanger according to claim 1, characterized in that, The tube body (1) is provided with a tube flow (8), which is sealed and isolated from the first end cap (2) and the second end cap (3) at both ends.

4. A heat exchanger according to claim 3, characterized in that, The tube body (1) is provided with baffles (7), and multiple baffles (7) are arranged alternately. The tube body (1) is provided with a tube body inlet (9) and a tube body outlet (10). The tube body inlet (9) and the tube body outlet (10) are both connected to the tube body flow (8) inside the tube body (1).

5. A heat exchanger according to claim 1, characterized in that, The conical filter screen (13) is fixedly connected to the liquid inlet (11) of the sealing head by a short circuit, and the side wall of the conical filter screen (13) is provided with sieve holes (14).

6. A heat exchanger according to claim 1, characterized in that, The tube sheet (4) and the first end cap (2) are provided with positioning pins and / or positioning holes for connecting the screen (5).

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