Tubular heat exchanger and heat exchange equipment capable of cleaning tube side without disassembling shell

Abstract

The utility model relates to heat exchange technical field especially, relate to a kind of shell-and-tube heat exchanger and heat exchange equipment that can be cleaned in tube pass without disassembling box, the shell-and-tube heat exchanger that can be cleaned in tube pass without disassembling box includes shell-and-tube heat exchanger box, flange connector and reducing flange short pipe, by being set flange connector, and the reducing flange short pipe is detachably connected with the end of flange connector away from shell-and-tube heat exchanger box, when only need to clean heat exchanger tube pass, only need to remove reducing flange short pipe, since the minimum inner diameter of flange connector is greater than 600mm, staff can enter the inside of shell-and-tube heat exchanger box by flange connector, then remove the inside hole cover plate on partition plate etc., can use high-pressure cleaning equipment to clean tube pass completely inside shell-and-tube heat exchanger box, restore inside hole cover plate component after cleaning, then install reducing flange short pipe, can complete overhaul work, greatly reduce maintenance cost, shorten overhaul time.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and in particular to a shell-and-tube heat exchanger and heat exchange equipment that allows for tube cleaning without disassembling the casing. Background Technology

[0002] like Figure 1 and Figure 2 As shown, the existing shell-and-tube heat exchanger's casing, tube sheet, and shell flange (triple flange) fastening structure uses multiple double-ended studs (with many bolts around the flange) to press the three flanges together, tightening the gaskets between the casing flange and the tube sheet, and between the tube sheet and the shell flange, thus achieving a seal between the tube side and the outside environment, and between the shell side and the outside environment. After a period of use, the heat exchanger needs to be cleaned to maintain heat exchange efficiency. However, not both the tube side and shell side need to be cleaned simultaneously. In many cases, only the tube side needs to be cleaned. Cleaning the tube side simply requires disassembling the casing, and a high-pressure washer can easily clean the inner walls of the heat exchange tubes. However, with the existing fastening structure, after removing the fastening bolts, the casing flange, tube sheet flange, and shell flange all loosen simultaneously, and both the tube-side and shell-side gaskets need to be replaced. This is because after the flanges are loosened, the flanges and gaskets may move relative to each other, and the gasket pressure rebound may cause them to scatter, making it impossible to guarantee that the gaskets can still be used. Therefore, according to specifications, gaskets can only be used once. Replacing the shell-side gasket requires pulling the heat exchanger tube bundle out of the shell (core removal) before it can be done. After putting on the gasket, the tube bundle must be pushed back into the shell (core insertion). This greatly increases the workload and extends the maintenance time. Especially for large heat exchangers, the cost of "core removal" and "core insertion" can far exceed the cost of tube cleaning. Utility Model Content

[0003] This invention provides a shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing, thereby solving the problems of cumbersome installation and disassembly processes, large maintenance workload, and high maintenance costs in the existing technology.

[0004] This utility model provides a shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing, comprising:

[0005] A shell-and-tube heat exchanger housing, wherein the interior of the shell-and-tube heat exchanger housing is provided with a partition to divide the interior of the shell-and-tube heat exchanger housing into multiple chambers, and the partition is provided with an internal manhole connecting two adjacent chambers, and the internal manhole is provided with an internal manhole cover.

[0006] A flange connection is provided on the side wall of the shell-and-tube heat exchanger housing and communicates with the corresponding chamber. The minimum inner diameter of the flange connection is greater than 600 mm.

[0007] A reducing flange short pipe is provided, wherein the reducing flange short pipe is detachably connected to the end of the flange connecting pipe away from the shell-and-tube heat exchanger housing.

[0008] According to the present invention, a shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing is provided, wherein the inner diameter of the reducing flange short tube gradually decreases along the direction away from the flange connecting tube.

[0009] According to the present invention, a shell-and-tube heat exchanger that allows tube cleaning without disassembling the casing is provided, wherein the reducing flange short tube and the flange connecting tube are connected at the end away from the casing of the shell-and-tube heat exchanger via a flange.

[0010] According to this utility model, a shell-and-tube heat exchanger allows for tube-side cleaning without disassembling the casing. The flange connection includes a casing outlet flange connection and a casing inlet flange connection. The reducing flange short pipe includes an inlet reducing flange short pipe and an outlet reducing flange short pipe. The casing outlet flange connection and the casing inlet flange connection are respectively connected to the corresponding chambers. The end of the inlet reducing flange short pipe that is away from the casing of the shell-and-tube heat exchanger is connected to the end of the casing inlet flange connection that is away from the casing of the shell-and-tube heat exchanger via a flange. The end of the outlet reducing flange short pipe that is away from the casing of the shell-and-tube heat exchanger is connected to the end of the casing outlet flange connection that is away from the casing of the shell-and-tube heat exchanger via a flange.

[0011] According to the present invention, a shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing is provided, wherein the outlet reducing flange short pipe and the casing outlet flange connecting pipe are located at the upper part of the shell-and-tube heat exchanger casing.

[0012] According to this utility model, a shell-and-tube heat exchanger that allows for tube cleaning without disassembling the casing is provided, wherein the inner manhole is an oblong hole.

[0013] According to the present invention, a shell-and-tube heat exchanger that allows tube cleaning without disassembling the casing is provided, wherein the major axis of the inner manhole is greater than 600mm and the minor axis of the oblong hole is greater than 450mm.

[0014] According to the present invention, a shell-and-tube heat exchanger that allows tube cleaning without disassembling the casing is provided, wherein an internal drain port is provided on the partition plate and an internal drain port cover is provided on the internal drain port.

[0015] According to the present invention, a shell-and-tube heat exchanger that allows tube cleaning without disassembling the casing is provided, wherein the bottom of the shell-and-tube heat exchanger casing is provided with an external drain port, and the external drain port is provided with an external drain port cover.

[0016] This utility model also provides a heat exchange device, which includes a shell-and-tube heat exchanger as described in any of the above-mentioned embodiments, which allows for tube cleaning without disassembling the casing.

[0017] This utility model provides a shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing. By installing a flange connection and detachably connecting the reducing flange short pipe to the end of the flange connection away from the shell-and-tube heat exchanger casing, when only the tube side needs cleaning, only the reducing flange short pipe needs to be removed. Since the minimum inner diameter of the flange connection is greater than 600mm, workers can enter the interior of the shell-and-tube heat exchanger casing through the flange connection, remove the inner manhole cover on the partition, and then use high-pressure cleaning equipment to clean the tube side inside the shell-and-tube heat exchanger casing. After cleaning, the inner manhole cover and other components are restored, and the reducing flange short pipe is reinstalled, thus completing the maintenance work, greatly reducing maintenance costs and shortening maintenance time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional structural diagram of an existing shell-and-tube heat exchanger provided by this utility model.

[0020] Figure 2 yes Figure 1 A magnified schematic diagram of a portion of the structure.

[0021] Figure 3 This is one of the cross-sectional structural diagrams of a shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing, as provided by this utility model.

[0022] Figure 4 This is the second cross-sectional structural diagram of the shell-and-tube heat exchanger provided by this utility model, which allows for tube-side cleaning without disassembling the casing.

[0023] Figure label:

[0024] 10. Shell flange; 20. Tube sheet flange; 30. Shell flange; 40. Tube-side gasket; 50. Shell-side gasket; 60. Shell-and-tube heat exchanger housing; 61. Partition plate; 70. Internal manhole cover; 80. Housing outlet flange connection; 90. Housing inlet flange connection; 100. Outlet reducing flange short pipe; 110. Internal drain outlet; 120. External drain outlet; 130. Inlet reducing flange short pipe. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0028] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] The following is combined Figures 3 to 4 This invention describes the specific structure of a shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing.

[0031] Figure 3 This invention provides a cross-sectional structural diagram of a shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing. Figure 4 This invention provides a second example of a cross-sectional structural diagram of a shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing. Figures 3 to 4 As shown, a shell-and-tube heat exchanger that allows tube-side cleaning without disassembling the casing includes a shell-and-tube heat exchanger housing 60, flange connections, and reducing flange short tubes. The shell-and-tube heat exchanger housing 60 has an internal partition 61 that divides its interior into multiple chambers. The partition 61 has internal manholes connecting adjacent chambers, each fitted with a manhole cover 70. Flange connections are located on the sidewalls of the shell-and-tube heat exchanger housing 60 and communicate with the corresponding chambers. The minimum inner diameter of the flange connections is greater than 600 mm. The reducing flange short tube is detachably connected to the end of the flange connection furthest from the shell-and-tube heat exchanger housing 60.

[0032] Figure 1 A cross-sectional structural diagram of an existing shell-and-tube heat exchanger provided by this utility model is illustrated. Figure 2 yes Figure 1 A partially enlarged structural diagram, such as Figure 1 and Figure 2 As shown, in the existing technology, the housing flange 10, tube sheet flange 20, and shell flange 30 need to be removed at the same time. This results in the need to replace both the tube-side sealing gasket 40 and the shell-side sealing gasket 50, which leads to cumbersome installation and disassembly processes, a large workload for maintenance, and high maintenance costs.

[0033] This utility model provides a shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing. By installing a flange connection and detachably connecting the reducing flange short pipe to the end of the flange connection away from the shell-and-tube heat exchanger casing 60, when only the tube side needs cleaning, a "no casing disassembly, no core removal" maintenance method is adopted. Only the reducing flange short pipe needs to be removed. Since the minimum inner diameter of the flange connection is greater than 600mm, workers can enter the interior of the shell-and-tube heat exchanger casing 60 through the flange connection, remove the inner manhole cover 70 on the partition plate, and then use high-pressure cleaning equipment to clean the tube side inside the shell-and-tube heat exchanger casing 60. After cleaning, the inner manhole cover 70 is restored, and the reducing flange short pipe is reinstalled to complete the maintenance work. This utility model avoids the traditional shell-and-tube heat exchanger that requires disassembling triple flanges, replacing shell-side sealing gaskets 50, and core removal / reinsertion during tube-side cleaning. Only 2-3 workers are needed to complete the cleaning, saving labor costs.

[0034] This utility model provides a shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing. Cleaning can be performed simply by removing the short pipe of the reducing flange, and the unit can be reassembled after cleaning. This reduces the maintenance time of a single unit by more than 80%, and the shell-side gaskets remain undisturbed during the tube-side cleaning process, significantly reducing the annual gasket consumption and maintenance costs.

[0035] In one embodiment of this invention, the inner diameter of the reducing flange short pipe gradually decreases along the direction away from the flange connector. Since the inner diameter of the reducing flange short pipe is relatively large, by gradually decreasing its inner diameter along the direction away from the flange connector, it is convenient to connect the end of the reducing flange short pipe away from the flange connector to other pipelines. Simultaneously, the tapered channel can create a Venturi effect, reducing the turbulence intensity of the fluid at the diameter change and minimizing local resistance losses.

[0036] In one embodiment of this utility model, the end of the reducing flange short pipe and the flange connecting pipe furthest from the shell-and-tube heat exchanger housing 60 is connected by a flange. Of course, the connection method between the reducing flange short pipe and the flange connecting pipe is not limited to this, and other connection methods can also be used. The flange connection adopts a standardized bolt fastening structure, which allows operators to complete the disassembly and installation of the reducing flange short pipe in a very short time, greatly improving maintenance efficiency.

[0037] In one embodiment of the present invention, a vertically arranged partition 61 divides the interior of the shell-and-tube heat exchanger housing 60 into two chambers, left and right, and a horizontally arranged partition 61 further divides the left chamber into an upper chamber and a lower chamber.

[0038] In one embodiment of this utility model, the flange connection includes a housing outlet flange connection 80 and a housing inlet flange connection 90. The housing outlet flange connection 80 and the housing inlet flange connection 90 have the same structure, but their dimensions can be the same or different. The shorter the length of the housing outlet flange connection 80 and the housing inlet flange connection 90, the better, to facilitate personnel entering the housing. The housing outlet flange connection 80 and the housing inlet flange connection 90 are respectively connected to corresponding chambers. Specifically, the housing inlet flange connection 90 is connected to the lower left chamber, and the housing outlet flange connection 80 is connected to the upper left chamber.

[0039] The reducing flange short pipe includes an inlet reducing flange short pipe 130 and an outlet reducing flange short pipe 100. The inlet reducing flange short pipe 130 is connected to the end of the inlet flange pipe 90 of the shell-and-tube heat exchanger box 60 away from the box body via a flange. The outlet reducing flange short pipe 100 is connected to the end of the outlet flange pipe 80 of the shell-and-tube heat exchanger box 60 away from the box body via a flange.

[0040] In one embodiment of this utility model, the outlet reducing flange short pipe 100 and the shell outlet flange connecting pipe 80 are located at the upper part of the shell-and-tube heat exchanger housing 60, with the end of the outlet reducing flange short pipe 100 away from the shell outlet flange connecting pipe 80 facing upwards. The outlet reducing flange short pipe 100 being located at the highest point and facing upwards creates a "chimney effect," which allows the internal gas of the shell-and-tube heat exchanger housing 60 to be discharged, improving the safety of the shell-and-tube heat exchanger where tube cleaning can be performed without disassembling the housing.

[0041] In one embodiment of this invention, the inner manhole is an elongated oval opening, allowing workers to pass between the various chambers of the enclosure and facilitating their work. Preferably, the major axis of the inner manhole is greater than 600mm, and the minor axis of the elongated oval opening is greater than 450mm. Using this size elongated oval opening allows workers to easily pass through, avoiding the drawback of traditional round openings that require sideways movement.

[0042] In one embodiment of this utility model, an inner drain port 110 is provided on the partition 61, and the inner drain port 110 is provided with an inner drain port cover. During normal operation, the media on both sides of the partition 61 do not flow across each other, ensuring a stable heat exchange process. Specifically, as shown... Figure 3 As shown, the internal drain outlet 110 is located on the horizontal partition 61. During cleaning operations, the internal drain outlet cover is opened first, and then the cleaning operation is carried out. Wastewater in the upper chamber of the partition 61 can enter the lower chamber of the partition 61 through the internal drain outlet 110, and then be discharged through the external drain outlet 120. By setting the internal drain outlet 110, wastewater can be continuously discharged from top to bottom by gravity, without the need for an additional sewage pump or vacuum suction device.

[0043] In one embodiment of this utility model, the bottom of the shell-and-tube heat exchanger housing 60 is provided with an external drain port 120, and the external drain port 120 is provided with an external drain port cover. Preferably, there are two external drain ports 120, one of which communicates with the lower left chamber, and the other external drain port 120 communicates with the right chamber. During cleaning operations, the internal drain port cover is opened first, and then the cleaning operation is carried out. Wastewater in the chamber can be discharged through the corresponding external drain port 120.

[0044] In one embodiment of this utility model, the shell-and-tube heat exchanger that allows tube cleaning without disassembling the casing also includes a limit switch and an indicator light. The limit switch is located on the flange of the inlet reducing flange short pipe 130 and abuts against the flange of the casing inlet flange connecting pipe 90. The limit switch is electrically connected to the indicator light. When the flange of the inlet reducing flange short pipe 130 is separated from the flange of the casing inlet flange connecting pipe 90, the switch contacts open, the circuit is connected, and the indicator light is lit. The lit indicator light can remind other personnel that the inside of the shell-and-tube heat exchanger is being cleaned and that the inlet reducing flange short pipe 130 should not be installed.

[0045] This utility model also provides a heat exchange device, which includes a shell-and-tube heat exchanger as described in any of the above embodiments, which allows for tube cleaning without disassembling the casing.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing, characterized in that, include: A shell-and-tube heat exchanger housing (60) is provided with a partition (61) inside the shell-and-tube heat exchanger housing (60) to divide the interior of the shell-and-tube heat exchanger housing (60) into multiple chambers. The partition (61) is provided with an internal manhole that connects two adjacent chambers. The internal manhole is provided with an internal manhole cover (70). A flange connection is provided on the side wall of the shell-and-tube heat exchanger housing (60) and communicates with the corresponding chamber. The minimum inner diameter of the flange connection is greater than 600 mm. A reducing flange short pipe is provided, wherein the reducing flange short pipe is detachably connected to the end of the flange connecting pipe away from the shell-and-tube heat exchanger housing (60).

2. The shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing according to claim 1, characterized in that, The inner diameter of the reducing flange short pipe gradually decreases along the direction away from the flange connecting pipe.

3. The shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing according to claim 2, characterized in that, The reducing flange short pipe and the flange connecting pipe are connected by a flange at the end away from the shell and tube heat exchanger housing (60).

4. The shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing according to claim 3, characterized in that, The flange connection includes a housing outlet flange connection (80) and a housing inlet flange connection (90). The reducing flange short pipe includes an inlet reducing flange short pipe (130) and an outlet reducing flange short pipe (100). The housing outlet flange connection (80) and the housing inlet flange connection (90) are respectively connected to the corresponding chambers. The end of the inlet reducing flange short pipe (130) and the housing inlet flange connection (90) away from the housing (60) of the shell-and-tube heat exchanger are connected by a flange. The end of the outlet reducing flange short pipe (100) and the end of the housing outlet flange connection (80) away from the housing (60) of the shell-and-tube heat exchanger are connected by a flange.

5. The shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing according to claim 4, characterized in that, The outlet reducing flange short pipe (100) and the box body outlet flange connecting pipe (80) are located at the upper part of the shell and tube heat exchanger box body (60).

6. The shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing, as described in any one of claims 1 to 5, is characterized in that... The manhole is an oblong hole.

7. The shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing according to claim 6, characterized in that, The major axis of the inner manhole is greater than 600 mm, and the minor axis of the oblong hole is greater than 450 mm.

8. The shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing according to claim 6, characterized in that, The partition (61) is provided with an internal drain outlet (110), and the internal drain outlet (110) is provided with an internal drain outlet cover.

9. The shell-and-tube heat exchanger that allows for tube-side cleaning without disassembling the casing according to claim 6, characterized in that, The bottom of the shell-and-tube heat exchanger housing (60) is provided with an external drain port (120), and the external drain port (120) is provided with an external drain port cover.

10. A heat exchange device, characterized in that, The heat exchange equipment includes the shell-and-tube heat exchanger described in any one of claims 1 to 9, which allows for tube-side cleaning without disassembling the casing.

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