Oil refining water circulation heat exchanger

Abstract

The invention relates to the technical field of oil refining, in particular to an oil refining water circulation heat exchanger which comprises a storage bin, a heat exchange box and a heat conduction box, the heat conduction box is arranged in the heat exchange box, and a heat exchange cavity is formed between the heat conduction box and the heat exchange box; at least part of the heat conduction pipe set is arranged in the heat conduction box, the heat conduction pipe set comprises a water inlet main pipe, heat exchange branch pipes and a water outlet main pipe, the number of the heat exchange branch pipes is multiple, one end of each heat exchange branch pipe communicates with the water inlet main pipe, and the other end of each heat exchange branch pipe communicates with the water outlet main pipe; at least part of the heat exchange pipe is arranged in the heat exchange cavity, and a heat conduction medium is arranged in the heat conduction box, so that the heat conduction pipe set transmits heat to the heat exchange pipe; and the intercepting assemblies are arranged between the heat exchange branch pipes and the water inlet main pipe, and the intercepting assemblies are used for communicating the heat exchange branch pipes and the water inlet main pipe. The heat exchange branch pipes with leakage can be blocked, the situation that leaked liquid pollutes the external environment is avoided, and meanwhile normal work of other heat exchange branch pipes is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of oil refining, and in particular to an oil refining water circulation heat exchanger. Background Art

[0002] Refinery water circulation heat exchanger is a commonly used equipment in the petrochemical industry, mainly used to improve the utilization efficiency of heat energy in the refining process. It uses circulating water for heat exchange, transferring heat energy from the high temperature end to the low temperature end, thereby realizing energy recovery and utilization and reducing energy consumption. In the modern oil industry, water resources are used to a large extent. If effective treatment measures are not taken, it will cause serious waste of water resources. Therefore, it is necessary to reduce industrial water consumption through the application of circulating water treatment technology, and realize the rational use of water resources while improving refining efficiency.

[0003] Existing circulating water heat exchangers are prone to leakage and blockage during use. If not handled in time, the heat exchange efficiency of the system will be affected. Summary of the invention

[0004] In order to solve the problems of water leakage and blockage in existing heat exchangers, the present application provides a refinery water circulation heat exchanger.

[0005] The present application provides a refinery water circulation heat exchanger, which adopts the following technical solution:

[0006] A refinery water circulation heat exchanger comprises a heat exchange box and a heat conduction box, wherein the heat conduction box is arranged inside the heat exchange box, and a heat exchange cavity is provided between the heat conduction box and the heat exchange box;

[0007] The heat conduction pipe group is at least partially arranged in the heat conduction box, and the heat conduction pipe group includes a water inlet main pipe, a heat exchange branch pipe and a water outlet main pipe. A plurality of heat exchange branch pipes are provided, and one end of each heat exchange branch pipe is connected to the water inlet main pipe, and the other end is connected to the water outlet main pipe;

[0008] The heat exchange tube is at least partially arranged in the heat exchange cavity, and a heat transfer medium is arranged in the heat transfer box so that the heat transfer tube group transfers heat to the heat exchange tube;

[0009] The interception assembly is arranged between each heat exchange branch pipe and the water inlet main pipe. The interception assembly is used to connect the heat exchange branch pipe and the water inlet main pipe. When leakage occurs between the water inlet main pipe and the heat exchange branch pipe, the interception assembly is used to open and close the heat exchange branch pipe to achieve interception.

[0010] By adopting the above technical scheme, by setting up a plurality of heat exchange branch pipes, on the one hand, a good heat exchange effect can be achieved, and on the other hand, when one of the heat exchange branch pipes leaks, the other heat exchange branch pipes can work normally and will not affect the normal operation of the refinery water circulation heat exchanger; by setting up an interception component, when one of the heat exchange branch pipes leaks, the interception component can seal the leaking heat exchange branch pipe to avoid leakage from polluting the external environment; in addition, when the connection between the heat exchange branch pipe and the water inlet main pipe is blocked, the interception component can be moved back and forth between the heat exchange branch pipe and the water inlet main pipe to achieve the effect of dredging and preventing blockage.

[0011] Optionally, the cut-off assembly includes an cut-off piece, a protective cover, a first waterproof cover and a second waterproof cover. The cut-off piece is arranged between the water inlet main pipe and each heat exchange branch pipe, the protective cover is fixedly mounted on the cut-off piece, a flow channel is opened in the cut-off piece, and the flow channel is connected with the heat exchange branch pipe and the water inlet main pipe; one end of the first waterproof cover is connected to the heat exchange branch pipe, and the other end is threadedly connected to the protective cover; one end of the second waterproof cover is connected to the water inlet main pipe, and the other end is threadedly connected to an end of the protective cover away from the first waterproof cover, so that the cut-off piece and the protective cover can move between the first waterproof cover and the second waterproof cover.

[0012] By adopting the above technical solution and providing the first waterproof cover and the second waterproof cover, when the intercepting member is moving, it is possible to prevent liquid from flowing out from between the water inlet main pipe and the heat exchange branch pipe, thereby achieving a protective effect; and by providing the protective cover, it is convenient to move the intercepting member.

[0013] Optionally, each heat exchange branch pipe has a heat exchange channel, and a water inlet channel is arranged in the water inlet main pipe. The shut-off member includes a main body, a first blocking portion and a second blocking portion. The first blocking portion is connected to one end of the main body close to the heat exchange branch pipe, and the second blocking portion is connected to one end of the main body close to the water inlet main pipe. The first blocking portion is used to close the heat exchange channel, and the second blocking portion is used to close the water inlet channel.

[0014] By adopting the above technical solution, by setting the first sealing part and the second sealing part, the first sealing part can be moved close to or away from the heat exchange channel to achieve the closing or opening of the heat exchange channel, and the first sealing part can be moved close to or away from the heat exchange channel to adjust the flow rate of the liquid; similarly, the second sealing part can be moved close to or away from the water inlet channel to achieve the closing or opening of the water inlet channel, and the second sealing part can be moved close to or away from the heat exchange channel to adjust the flow rate of the liquid.

[0015] Optionally, the heat exchange channel includes a first channel and a second channel that are interconnected, the second channel is close to the shut-off piece relative to the first channel, the diameter of the second channel is larger than that of the first channel, and the diameter of the first channel is the same as the diameter of the first blocking portion; the water inlet channel includes a third channel and a fourth channel that are interconnected, the fourth channel is close to the shut-off piece relative to the third channel, the diameter of the fourth channel is larger than that of the third channel, and the diameter of the third channel is the same as the diameter of the second blocking portion.

[0016] By adopting the above technical solution, since the caliber of the first channel is the same as the diameter of the first blocking part, the shutoff piece moves toward the first channel until it contacts the heat exchange branch pipe, thereby blocking the first channel; similarly, since the caliber of the third channel is the same as the diameter of the second blocking part, the second blocking part moves toward the third channel until it contacts the water inlet main pipe, thereby blocking the third channel. In this way, when a leak occurs in the heat exchange branch pipe or the water inlet main pipe, it can be blocked in time to achieve interception, so that the leaking pipe stops working, and other pipes can continue to work, which will not affect the water circulation heat exchange effect.

[0017] Optionally, the diameter of the main body is the same as the calibers of the second channel and the fourth channel.

[0018] By adopting the above technical solution, when a leak occurs in the heat exchange branch pipe, the first channel is blocked by the first blocking part, and the main body can block the second channel at the same time, which helps to further achieve a better blocking effect.

[0019] Optionally, a first annular groove and a second annular groove are provided in the protective cover, the first waterproof cover is at least partially slidably embedded in the first annular groove, the second waterproof cover is at least partially slidably embedded in the second annular groove, a first elastic member is provided in the first annular groove, one end of the first elastic member is in contact with the inner wall of the first annular groove, and the other end is in contact with the first waterproof cover, a second elastic member is provided in the second annular groove, one end of the second elastic member is in contact with the inner wall of the second annular groove, and the other end is in contact with the second waterproof cover.

[0020] By adopting the above technical solution and providing the first elastic member and the second elastic member, when the protective cover and the intercepting member are moved, collision between the protective cover and the first waterproof cover and the second waterproof cover can be avoided as much as possible, thereby playing a buffering and protective role.

[0021] Optionally, the intercepting assembly also includes a first protective sleeve and a second protective sleeve, the first protective sleeve is sleeved on the heat exchange branch pipe, the first protective sleeve is provided with a first groove and a second groove, the first waterproof sleeve is provided in the first groove and is engaged with the inner wall of the first groove, and one end of the protective sleeve is provided in the second groove; the second protective sleeve is sleeved on the water inlet main pipe, the second protective sleeve is provided with a third groove and a fourth groove, the second waterproof sleeve is provided in the third groove and is engaged with the inner wall of the third groove, and the other end of the protective sleeve is provided in the fourth groove.

[0022] By adopting the above technical solution, by setting the first protective cover and the second protective cover, the first protective cover simultaneously covers the heat exchange branch pipe, the first waterproof cover and at least part of the protective cover, and the second protective cover simultaneously covers the water inlet main pipe, the second waterproof cover and at least part of the protective cover, thereby further avoiding leakage of the water inlet main pipe and the heat exchange branch pipe at the connection point to achieve a better sealing effect.

[0023] Optionally, a gap is provided between the first protective sleeve and the second protective sleeve, and a swivel is provided on the outer wall of the protective sleeve facing away from the shut-off member, and the swivel is provided in the gap.

[0024] By adopting the above technical solution and providing a swivel, it is convenient to rotate the protective sleeve and the shut-off member, thereby facilitating the movement of the shut-off member between the heat exchange branch pipe and the water inlet main pipe.

[0025] Optionally, the shut-off member also includes a first transition portion and a second transition portion which are interconnected, the first transition portion being connected between the main body and the first blocking portion, the second transition portion being connected between the main body and the second blocking portion, the flow channel including a main flow channel, a first branch flow channel and a second branch flow channel, the main flow channel being opened in the main body, the first branch flow channel being opened in the first transition portion, and the second branch flow channel being opened in the second transition portion.

[0026] By adopting the above technical solution, by setting the first transition part and the second transition part, the first transition part connects the first blocking part and the main body, and the second transition part connects the second blocking part and the main body, when the pipeline leaks, when the first blocking part is blocked, the first transition part can contact with the inner wall of the heat exchange channel to achieve a good sealing effect, thereby achieving a good blocking effect; when the second blocking part is blocked, the second transition part can contact with the inner wall of the water inlet channel to achieve a good sealing effect, thereby achieving a good blocking effect.

[0027] Optionally, a first protrusion is provided at one end of the first blocking portion facing the heat exchange branch pipe, and a first protrusion is provided at one end of the second blocking portion facing the water inlet main pipe, and both the first protrusion and the second protrusion are conical.

[0028] By adopting the above technical solution, when the pipeline is blocked, a better cleaning effect can be achieved by moving the intercepting member so that the first protrusion and the second protrusion come into contact with the sludge.

[0029] Compared with the prior art, the present invention has at least one of the following beneficial technical effects:

[0030] 1. By setting up the interception component, when one of the heat exchange branch pipes leaks, the interception component can block the leaking heat exchange branch pipe to prevent the leakage from polluting the external environment;

[0031] 2. By setting up multiple heat exchange branches, on the one hand, a good heat exchange effect can be achieved; on the other hand, when one of the heat exchange branches leaks, the other heat exchange branches can work normally and will not affect the normal operation of the refinery water circulation heat exchanger;

[0032] 3. When the connection between the heat exchange branch pipe and the water inlet main pipe is blocked, the interception component can be moved back and forth between the heat exchange branch pipe and the water inlet main pipe to achieve the effect of dredging and preventing blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the refinery water circulation heat exchanger in the embodiment of the present application.

[0034] Figure 2 It is an internal cross-sectional view of the refinery water circulation heat exchanger in the embodiment of the present application.

[0035] Figure 3 It is an internal cross-sectional view of the shut-off assembly in the embodiment of the present application.

[0036] Figure 4 It is a schematic diagram of the structure of the shut-off member and the protective cover in the embodiment of the present application.

[0037] Figure 5 It is a schematic diagram of the structure of the shut-off member in the embodiment of the present application.

[0038] Figure 6 It is a schematic diagram of the structure of the first protective cover or the second protective cover in the embodiment of the present application.

[0039] In the figure:

[0040] 1. heat exchange box; 2. heat conduction box; 3. heat exchange cavity; 4. heat conduction pipe group; 41. water inlet main pipe; 411. water inlet channel; 412. third channel; 413. fourth channel; 42. heat exchange branch pipe; 421. heat exchange channel; 422. first channel; 423. second channel; 43. water outlet main pipe; 5. heat exchange pipe; 6. cut-off assembly; 61. cut-off member; 610. flow channel; 601. main flow channel; 602. first branch flow channel; 603. second branch flow channel; 611. main body; 612. The first blocking portion; 613, the second blocking portion; 614, the first protrusion; 615, the second protrusion; 62, the protective cover; 621, the first ring groove; 622, the second ring groove; 623, the first elastic member; 624, the second elastic member; 63, the first waterproof cover; 64, the second waterproof cover; 65, the first protective cover; 651, the first groove; 652, the second groove; 66, the second protective cover; 661, the third groove; 662, the fourth groove; 67, the swivel; 68, the first transition portion; 69, the second transition portion. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0043] The present application provides a refinery water circulation heat exchanger, referring to Figure 1 and Figure 2 The refinery water circulation heat exchanger includes a heat exchange box 1 and a heat conduction box 2. The heat conduction box 2 is arranged in the heat exchange box 1. A heat exchange cavity 3 is provided between the heat conduction box 2 and the heat exchange box 1. The refinery water circulation heat exchanger also includes a heat conduction pipe group 4 and a heat exchange tube 5. The heat exchange tube 5 is arranged in the heat exchange cavity 3. A heat conduction medium is arranged in the heat conduction box 2. The high-temperature waste liquid transfers heat to the heat conduction pipe group 4, and then the heat of the heat conduction pipe group 4 is transferred to the heat exchange tube 5 through the heat conduction medium. The heat exchange tube 5 transfers heat to the liquid in the tube to achieve heat exchange.

[0044] It is understandable that in this embodiment, the heat exchange tube 5 is arranged in a spiral shape in the heat exchange cavity 3, so as to increase the contact area with the heat conduction box 2 and extend the flow path of the liquid in the heat conduction box, thereby achieving a better heat exchange effect. In other embodiments, the heat exchange tube 5 can also be arranged in other forms, which are not limited here.

[0045] In this embodiment, the heat conduction pipe group 4 is at least partially arranged in the heat conduction box 2. The heat conduction pipe group 4 includes a water inlet main pipe 41, a heat exchange branch pipe 42 and a water outlet main pipe 43. One end of the water inlet main pipe 41 and the water outlet main pipe 43 are both arranged outside the heat conduction box 2. A plurality of heat exchange branch pipes 42 are provided. One end of each heat exchange branch pipe 42 is connected to the water inlet main pipe 41, and the other end passes through the heat conduction box 2 and is connected to the water outlet main pipe 43.

[0046] Similarly, in this embodiment, each heat exchange branch pipe 42 is arranged in a spiral shape in the heat transfer box 2 to extend the flow path of the high-temperature liquid in the heat transfer box 1, thereby achieving a better heat exchange effect. It is not difficult to understand that in this embodiment, each heat exchange branch pipe 42 can be arranged in a spiral shape, and multiple heat exchange branch pipes 42 are stacked.

[0047] In addition, refer to Figure 1and Figure 2 The refinery water circulation heat exchanger also includes a shut-off component 6, which is arranged between each heat exchange branch pipe 42 and the water inlet main pipe 41. The shut-off component 6 is used to connect the heat exchange branch pipe 42 and the water inlet main pipe 41. When leakage occurs between the water inlet main pipe 41 and the heat exchange branch pipe 42, the shut-off component 6 is used to open and close the heat exchange branch pipe 42 to achieve shut-off.

[0048] By providing a plurality of heat exchange branch pipes 42 and providing a cut-off assembly 6 between each heat exchange branch pipe 42 and the water inlet main pipe 41, when a heat exchange branch pipe 42 leaks, the cut-off assembly 6 can close a single heat exchange branch pipe 42, thereby cutting off the single heat exchange branch pipe 42 without affecting the use of other heat exchange branch pipes 42, thereby ensuring the normal operation of the water circulation heat exchanger. In addition, the cut-off assembly 6 is provided, and by moving the cut-off assembly 6 between the heat exchange branch pipe 42 and the water inlet main pipe 41, a good anti-blocking effect is achieved.

[0049] Specifically, refer to Figure 3 and Figure 4 In this embodiment, the interception assembly 6 includes an interception member 61, a protective cover 62, a first waterproof cover 63 and a second waterproof cover 64. The interception member 61 is arranged between the water inlet main pipe 41 and each heat exchange branch pipe 42. The protective cover 62 is fixedly sleeved on the outer periphery of the interception member 61. One end of the protective cover 62 is connected to the first waterproof cover 63, and the other end is connected to the second waterproof cover 64. A flow channel 610 is provided in the interception member 61, and the flow channel 610 is connected to the heat exchange branch pipe 42 and the water inlet main pipe 41. Specifically, each heat exchange branch pipe 42 has a heat exchange channel 421, and the water inlet main pipe 41 is provided with a water inlet channel 411. One end of the flow channel 610 is connected to the heat exchange branch pipe 42, and the other end is connected to the water inlet main pipe 41.

[0050] The high-temperature wastewater enters the flow channel 610 from the water inlet channel 411 of the water inlet main pipe 41, and then enters the heat exchange channel 421 of the heat exchange branch pipe 42 through the flow channel 610. The heat of the high-temperature wastewater is transferred to the liquid in the heat exchange tube 5 through the heat transfer medium in the heat exchange branch pipe 42, so as to fully utilize the heat and realize resource recycling.

[0051] Specifically, refer to Figures 3 to 5The shutoff member 61 includes a main body 611, a first blocking portion 612 and a second blocking portion 613. The first blocking portion 612 is connected to one end of the main body 611 close to the heat exchange branch pipe 42, and the second blocking portion 613 is connected to one end of the main body 611 close to the water inlet main pipe 41. The first blocking portion 612 is used to close the heat exchange channel 421, and the second blocking portion 613 is used to close the water inlet channel 411. One end of the first waterproof cover 63 is connected to the heat exchange branch pipe 42, and the other end is threadedly connected to the protective cover 62. One end of the second waterproof cover 64 is connected to the water inlet main pipe 41, and the other end is threadedly connected to one end of the protective cover 62 away from the first waterproof cover 63, so that the shutoff member 61 and the protective cover 62 can move between the first waterproof cover 63 and the second waterproof cover 64.

[0052] It is understandable that, in other embodiments, the first blocking portion 612 and the second blocking portion 613 may be hemispherical, and the first blocking portion 612 and the second blocking portion 613 may also be conical or have other irregular shapes, which are not limited here.

[0053] Since the protective sleeve 62 is threadedly connected to the first waterproof sleeve 63 and the second waterproof sleeve 64 respectively, the protective sleeve 62 can be rotated to drive the intercepting member 61 to move between the heat exchange branch pipe 42 and the water inlet main pipe 41. When the first blocking portion 612 of the intercepting member 61 enters the heat exchange channel 421, the heat exchange channel 421 is blocked. When the second blocking portion 613 of the intercepting member 61 enters the water inlet channel 411, the water inlet channel 411 is blocked, which is convenient for operation. At the same time, when the water inlet channel 411 and the heat exchange channel 421 are blocked, the intercepting member 61 repeatedly moves between the water inlet main pipe 41 and the heat exchange branch pipe 42, which can play the role of clearing the pipeline, so as to avoid blockage between the water inlet main pipe 41 and the heat exchange branch pipe 42 as much as possible.

[0054] Reference Figures 3 to 5 The heat exchange channel 421 includes a first channel 422 and a second channel 423 that are interconnected. The second channel 423 is closer to the shutoff member 61 relative to the first channel 422. The caliber of the second channel 423 is larger than that of the first channel 422. The caliber of the first channel 422 is the same as the diameter of the first blocking portion 612. The water inlet channel 411 includes a third channel 412 and a fourth channel 413 that are interconnected. The fourth channel 413 is closer to the shutoff member 61 relative to the third channel 412. The caliber of the fourth channel 413 is larger than that of the third channel 412. The caliber of the third channel 412 is the same as the diameter of the second blocking portion 613.

[0055] Since the caliber of the first channel 422 is the same as the diameter of the first blocking portion 612, the shutoff member 61 moves toward the first channel 422 until the shutoff member 61 contacts the heat exchange branch pipe 42, thereby blocking the first channel 422; similarly, since the caliber of the third channel 412 is the same as the diameter of the second blocking portion 613, the second blocking portion 613 moves toward the third channel 412 until the shutoff member 61 contacts the water inlet main pipe 41, thereby blocking the third channel 412. In this way, when the heat exchange branch pipe 42 or the water inlet main pipe 41 leaks, it can be blocked in time to achieve interception, so that the leaking pipe stops working, and other pipes can continue to work, which will not affect the water circulation heat exchange effect.

[0056] Furthermore, the diameter of the main body 611 is the same as the diameter of the second channel 423 and the fourth channel 413. When the heat exchange branch pipe 42 leaks, the first channel 422 is blocked by the first blocking portion 612, and the main body 611 can block the second channel 423, which helps to further achieve a better blocking effect.

[0057] In this embodiment, see Figure 3 and Figure 4 A first annular groove 621 is provided at one end of the protective cover 62 facing the first waterproof cover 63, and a second annular groove 622 is provided at one end of the protective cover 62 facing the second waterproof cover 64. The first waterproof cover 63 is slidably embedded in the first annular groove 621, and the second waterproof cover 64 is slidably embedded in the second annular groove 622. A first elastic member 623 is provided in the first annular groove 621, one end of the first elastic member 623 is in contact with the inner wall of the first annular groove 621, and the other end is in contact with the first waterproof cover 63. A second elastic member 624 is provided in the second annular groove 622, one end of the second elastic member 624 is in contact with the inner wall of the second annular groove 622, and the other end is in contact with the second waterproof cover 64.

[0058] It is easy to understand that in this embodiment, the first elastic member 623 and the second elastic member 624 are both springs. In other embodiments, the first elastic member 623 and the second elastic member 624 may also be rubber sleeves, etc., which are not limited here. By providing the first elastic member 623 and the second elastic member 624, when the protective cover 62 and the intercepting member 61 are moved, the collision between the protective cover 62 and the first waterproof cover 63 and the second waterproof cover 64 can be avoided as much as possible, thereby playing a buffering and protective role.

[0059] For further information, see Figure 3 and Figure 6In some embodiments, the shutoff member 61 further includes a first protective sleeve 65 and a second protective sleeve 66. The first protective sleeve 65 is sleeved on the heat exchange branch pipe 42. The first protective sleeve 65 is provided with a first groove 651 and a second groove 652. The first waterproof sleeve 63 is provided in the first groove 651 and is engaged with the inner wall of the first groove 651. One end of the protective sleeve 62 is provided in the second groove 652. The second protective sleeve 66 is sleeved on the water inlet main pipe 41. The second protective sleeve 66 is provided with a third groove 661 and a fourth groove 662. The second waterproof sleeve 64 is sleeved in the third groove 661 and is engaged with the inner wall of the third groove 661. The other end of the protective sleeve 62 is provided in the fourth groove 662. There is a moving gap between the protective sleeve 62 and the inner wall of the second groove 652, so as to facilitate the movement of the shutoff member 61.

[0060] By setting the first protective cover 65 and the second protective cover 66, the first protective cover 65 simultaneously covers the heat exchange branch pipe 42, the first waterproof cover 63 and at least part of the protective cover 62, and the second protective cover 66 simultaneously covers the water inlet main pipe 41, the second waterproof cover 64 and at least part of the protective cover 62, thereby further avoiding leakage of liquid at the connection between the water inlet main pipe 41 and the heat exchange branch pipe 42 to achieve a better sealing effect.

[0061] A gap is provided between the first protective sleeve 65 and the second protective sleeve 66. A swivel 67 is fixed on the outer wall of the protective sleeve 62 away from the shutoff member 61. The swivel 67 is provided in the gap. The swivel 67 facilitates the rotation of the protective sleeve 62 and the shutoff member 61, thereby facilitating the movement of the shutoff member 61 between the heat exchange branch pipe 42 and the water inlet main pipe 41.

[0062] Reference Figure 5 The shutoff member 61 further includes a first transition portion 68 and a second transition portion 69 which are interconnected. The first transition portion 68 is connected between the main body 611 and the first blocking portion 612, and the second transition portion 69 is connected between the main body 611 and the second blocking portion 613. The first transition portion 68, the second transition portion 69, the first anti-blocking portion 612, the main body 611, and the second anti-blocking portion 612 are divided by a dotted line in the middle, which is only used for illustration. The flow channel 610 includes a main flow channel 601, a first branch flow channel 602, and a second branch flow channel 603. The main flow channel 601 is opened in the main body 611, the first branch flow channel 602 is opened in the first transition portion 68, and the second branch flow channel 603 is opened in the second transition portion 69. It can be understood that in this embodiment, the first branch flow channel 602 and the second branch flow channel 603 are respectively provided with two sections to ensure the passing speed of the liquid. In other embodiments, the first branch channel 602 and the second branch channel 603 may be respectively provided with multiple sections or one section, which is not limited here.

[0063] In some embodiments, a first protrusion 614 is provided at one end of the first blocking portion 612 facing the heat exchange branch pipe 42, and a second protrusion 615 is provided at one end of the second blocking portion 613 facing the water inlet main pipe 41. Both the first protrusion 614 and the second protrusion 615 are conical.

[0064] By providing the first protrusion 614 on the first blocking portion 612 and the second protrusion 615 on the second blocking portion 613, when the pipeline is blocked, the first protrusion 614 and the second protrusion 615 can be moved to contact the sludge by the intercepting member 61, so as to achieve a better cleaning effect. It is understandable that in other embodiments, the first protrusion 614 and the second protrusion 615 can also be needle-shaped or other shapes, which are not limited here.

[0065] In some embodiments, a sealing ring may be provided on the first sealing portion 612 and the second sealing portion 613, or on the inner walls of the first annular groove 621 and the second annular groove 622, or on the inner walls of the second groove 652 and the fourth groove 662, or on any one or more of the first sealing portion 612 and the second sealing portion 613, the first annular groove 621 and the second annular groove 622, or the first annular groove 621 and the second annular groove 622, and no limitation is made here.

[0066] The working principle of the present application is as follows: high-temperature wastewater enters each water inlet branch from the water inlet main pipe 41, and the liquid to be heated enters the heat exchange tube 5. The high-temperature wastewater transfers heat to the heat-conducting medium, and the heat-conducting medium then transfers heat to the liquid in the heat exchange tube 5 to achieve heat exchange. Since the heat transfer tube group 4 contains high-temperature wastewater, if the heat transfer tube group 4 leaks, it will pollute the external environment. The refinery water circulation heat exchanger provided by the present application, when the heat exchange branch 42 or the water inlet main pipe 41 leaks, by rotating the swivel 67, the swivel 67 drives the protective sleeve 62 and the shut-off member 61 to move toward or away from the heat exchange branch 42; when the shut-off member 61 moves toward the heat exchange branch 42, the first blocking portion 612 blocks the first channel 422, and the main body 611 blocks the second channel 423 to achieve interception. When the heat conduction pipe group 4 operates normally, the high-temperature waste water passes through the third channel 412, the fourth channel 413, the second branch channel 603, the main channel 601, the first branch channel 602, the second channel 423 and the first channel 422 in sequence; during the flow of the waste water, the first waterproof cover 63 and the second waterproof cover 64 provide waterproof protection for the heat exchange branch pipe 42 and the water inlet main pipe 41, and the first protective cover 65 and the second protective cover 66 provide a second layer of waterproof protection to achieve a good leak-proof effect.

[0067] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A refinery water circulation heat exchanger, characterized in that: include: A heat exchange box (1) and a heat conduction box (2), wherein the heat conduction box (2) is arranged inside the heat exchange box (1), and a heat exchange cavity (3) is provided between the heat conduction box (2) and the heat exchange box (1); A heat conduction pipe group (4) is at least partially arranged in the heat conduction box (2), the heat conduction pipe group (4) comprises a water inlet main pipe (41), a heat exchange branch pipe (42) and a water outlet main pipe (43), a plurality of heat exchange branch pipes (42) are provided, one end of each heat exchange branch pipe (42) is connected to the water inlet main pipe (41), and the other end is connected to the water outlet main pipe (43); A heat exchange tube (5) is at least partially arranged in the heat exchange cavity (3), and a heat conduction medium is arranged in the heat conduction box (2), so that the heat conduction tube group (4) transfers heat to the heat exchange tube (5); A shut-off assembly (6) is provided between each of the heat exchange branch pipes (42) and the water inlet main pipe (41). The shut-off assembly (6) is used to connect the heat exchange branch pipes (42) with the water inlet main pipe (41). When leakage occurs between the water inlet main pipe (41) and the heat exchange branch pipes (42), the shut-off assembly (6) is used to open and close the heat exchange branch pipes (42) to achieve shut-off.

2. The refinery water circulation heat exchanger according to claim 1, characterized in that: The intercepting assembly (6) comprises an intercepting member (61), a protective cover (62), a first waterproof cover (63) and a second waterproof cover (64); the intercepting member (61) is arranged between the water inlet main pipe (41) and each of the heat exchange branch pipes (42); the protective cover (62) is fixedly mounted on the intercepting member (61); a flow channel (610) is provided in the intercepting member (61); the flow channel (610) is connected to the heat exchange branch pipe (42) and the water inlet main pipe (41); One end of the first waterproof sleeve (63) is connected to the heat exchange branch pipe (42), and the other end is threadedly connected to the protective sleeve (62); one end of the second waterproof sleeve (64) is connected to the water inlet main pipe (41), and the other end is threadedly connected to an end of the protective sleeve (62) away from the first waterproof sleeve (63), so that the shut-off member (61) and the protective sleeve (62) can move between the first waterproof sleeve (63) and the second waterproof sleeve (64).

3. The refinery water circulation heat exchanger according to claim 2, characterized in that: Each of the heat exchange branch pipes (42) has a heat exchange channel (421), the water inlet main pipe (41) is provided with a water inlet channel (411), the shut-off member (61) comprises a main body (611), a first blocking portion (612) and a second blocking portion (613), the first blocking portion (612) being connected to an end of the main body (611) close to the heat exchange branch pipe (42), the second blocking portion (613) being connected to an end of the main body (611) close to the water inlet main pipe (41), the first blocking portion (612) being used to close the heat exchange channel (421), and the second blocking portion (613) being used to close the water inlet channel (411).

4. The refinery water circulation heat exchanger according to claim 3, characterized in that: The heat exchange channel (421) comprises a first channel (422) and a second channel (423) which are interconnected; the second channel (423) is closer to the shutoff member (61) relative to the first channel (422); the caliber of the second channel (423) is larger than that of the first channel (422); and the caliber of the first channel (422) is the same as the diameter of the first blocking portion (612); the water inlet channel (411) comprises a third channel (412) and a fourth channel (413) which are interconnected; the fourth channel (413) is closer to the shutoff member (61) relative to the third channel (412); the caliber of the fourth channel (413) is larger than that of the third channel (412); and the caliber of the third channel (412) is the same as the diameter of the second blocking portion (613).

5. The refinery water circulation heat exchanger according to claim 4, characterized in that: The diameter of the main body (611) is the same as the calibers of the second channel (423) and the fourth channel (413).

6. The refinery water circulation heat exchanger according to claim 2, characterized in that: The protective cover (62) is provided with a first annular groove (621) and a second annular groove (622); the first waterproof cover (63) is at least partially slidably embedded in the first annular groove (621); the second waterproof cover (64) is at least partially slidably embedded in the second annular groove (622); a first elastic member (623) is provided in the first annular groove (621); one end of the first elastic member (623) contacts the inner wall of the first annular groove (621) and the other end contacts the first waterproof cover (63); a second elastic member (624) is provided in the second annular groove (622); one end of the second elastic member (624) contacts the inner wall of the second annular groove (622) and the other end contacts the second waterproof cover (64).

7. The refinery water circulation heat exchanger according to claim 2, characterized in that: The intercepting assembly (6) further comprises a first protective sleeve (65) and a second protective sleeve (66); the first protective sleeve (65) is sleeved on the heat exchange branch pipe (42); a first groove (651) and a second groove (652) are provided in the first protective sleeve (65); the first waterproof sleeve (63) is provided in the first groove (651) and is engaged with the inner wall of the first groove (651); one end of the protective sleeve (62) is provided in the second groove (652); the second protective sleeve (66) is sleeved on the water inlet main pipe (41); a third groove (661) and a fourth groove (662) are provided in the second protective sleeve (66); the second waterproof sleeve (64) is sleeved in the third groove (661) and is engaged with the inner wall of the third groove (661); the other end of the protective sleeve (62) is provided in the fourth groove (662).

8. The refinery water circulation heat exchanger according to claim 7, characterized in that: A gap is provided between the first protective sleeve (65) and the second protective sleeve (66); a swivel (67) is provided on the outer wall of the protective sleeve (62) facing away from the shut-off member (61); and the swivel (67) is arranged in the gap.

9. The refinery water circulation heat exchanger according to claim 3, characterized in that: The shut-off member (61) further comprises a first transition portion (68) and a second transition portion (69) which are interconnected, wherein the first transition portion (68) is connected between the main body (611) and the first blocking portion (612), and the second transition portion (69) is connected between the main body (611) and the second blocking portion (613). The flow channel (610) comprises a main flow channel (601), a first branch flow channel (602) and a second branch flow channel (603), wherein the main flow channel (601) is opened in the main body (611), the first branch flow channel (602) is opened in the first transition portion (68), and the second branch flow channel (603) is opened in the second transition portion (69).

10. The refinery water circulation heat exchanger according to claim 3, characterized in that: A first protrusion (614) is provided on one end of the first blocking portion (612) facing the heat exchange branch pipe (42), and a second protrusion (615) is provided on one end of the second blocking portion (613) facing the water inlet main pipe (41); the first protrusion (614) and the second protrusion (615) are both conical.

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