High-temperature tubular heat exchanger

Abstract

The high-temperature tubular heat exchanger comprises a high-temperature-resistant heat exchange tube and a protective shell outside the high-temperature-resistant heat exchange tube, the high-temperature-resistant heat exchange tube is detachably connected to the protective shell, and a slidable plugging ring attached to the high-temperature-resistant heat exchange tube is arranged in the high-temperature-resistant heat exchange tube. A one-way conduction assembly enabling liquid in the high-temperature-resistant heat exchange pipe to flow in a one-way mode is arranged on the slidable plugging ring, sealing grooves are formed in the two ends of the outer ring face of the slidable plugging ring, and sealing rings are arranged in the sealing grooves. A positioning and fixing assembly for fixing the slidable plugging ring at any position in the high-temperature-resistant heat exchange tube is arranged between the slidable plugging ring and the high-temperature-resistant heat exchange tube; the high-temperature-resistant heat exchange tube has the technical effect that when the high-temperature-resistant heat exchange tube is damaged, the damaged position can be quickly blocked without being disassembled.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a high-temperature tubular heat exchanger. Background Art

[0002] The tubular heat exchanger (also known as shell and tube, tube-in-tube) is the most typical partition-type heat exchanger. It has a long history of industrial application and still occupies a dominant position among all heat exchangers. The tubular heat exchanger is mainly composed of the shell, tube bundle, tube sheet and head. The shell is mostly circular, with parallel tube bundles inside, and the two ends of the tube bundle are fixed on the tube sheet. The two fluids for heat exchange in the tubular heat exchanger, one flows inside the tube, and its stroke is called the tube side; the other flows outside the tube, and its stroke is called the shell side. Among them, the heat transfer medium is generally steam, water, weakly corrosive chemical raw materials, etc., and the temperature is generally between minus 40 degrees and 400 degrees.

[0003] After a long period of use, the cold fluid in the tubular heat exchanger will be heated and precipitation or debris will be precipitated. The precipitated precipitation will adhere to and accumulate on the inner wall of the shell and the inner and outer walls of the tube body, which will greatly affect the heat transfer efficiency. At the same time, the temperature difference inside the tubular heat exchanger often changes, and the heat exchange tubes are prone to cracking and leakage, especially when the heat exchanger is in working condition. At this time, the replacement of the heat exchanger will affect the use of the equipment if leakage occurs. If some chemical products are processed, it will cause an imbalance in the reaction of the chemical products.

[0004] With respect to the above-mentioned related technologies, the inventors believe that there is a technical defect that leakage of the tubular heat exchanger during use will affect the working efficiency and product quality. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a high-temperature tubular heat exchanger.

[0006] The present application provides a high-temperature tubular heat exchanger, which adopts the following technical solution: A high-temperature tubular heat exchanger, comprising a high-temperature heat exchange tube and a protective shell outside the high-temperature heat exchange tube, the high-temperature heat exchange tube is detachably connected to the protective shell, a slidable sealing ring that fits the high-temperature heat exchange tube is arranged inside the high-temperature heat exchange tube, a unidirectional conduction component that enables the liquid in the high-temperature heat exchange tube to flow in one direction is arranged on the slidable sealing ring, sealing grooves are opened at both ends of the outer ring surface of the slidable sealing ring, a sealing ring is arranged in the sealing groove, and a fixing member for fixing the slidable sealing ring is arranged between the slidable sealing ring and the high-temperature heat exchange tube A positioning and fixing component at any position in the high-temperature resistant heat exchange tube; the one-way conductive component includes a one-way sealing baffle, a connecting rod is provided between the one-way sealing baffle and the slidable sealing ring, one end of the connecting rod is fixed to the slidable sealing ring, a connecting through hole is provided on the one-way sealing baffle at a position corresponding to the connecting rod, the connecting rod passes through the connecting through hole and a block is fixedly connected to its protruding end, and when the one-way sealing baffle is attached to the slidable sealing ring, the connecting through hole is tightly attached to the side wall of the slidable sealing ring.

[0007] By adopting the above technical scheme, when the high-temperature tube heat exchanger is in working state, high-temperature liquid flows into the liquid inlet of the high-temperature heat exchange tube and flows out from the liquid outlet. When the high-temperature heat exchange tube is damaged at a certain position, in order not to affect the production, the high-temperature liquid can be controlled to flow into the liquid outlet of the high-temperature heat exchange tube, and the liquid inlet of the high-temperature heat exchange tube can be blocked. At this time, since the one-way conductive component can only conduct one way, the high-temperature liquid will drive the one-way conductive component to move in the high-temperature heat exchange tube, and the gas or liquid in the space between the one-way conductive component and the liquid inlet will flow out through the damaged position until the slidable sealing ring blocks the damaged position. At this time, the slidable sealing ring is fixed at this position by the positioning and fixing component, and then the work can be restarted. Due to the existence of the one-way conductive component, the liquid flows out of the high-temperature heat exchange tube. The liquid flows into the liquid inlet and flows out at the liquid outlet, which can work normally; the unidirectional conductive component can make the high-temperature liquid in the high-temperature heat exchange tube flow in one direction, that is, flow in from the liquid inlet and flow out from the liquid outlet. When flowing in the forward direction, the one-way sealing baffle will break away from the slidable sealing ring and slide along the length direction of the connecting rod, and finally abut against the block. At this time, there is a gap between the one-way sealing baffle and the slidable sealing ring, and the high-temperature liquid flows out from the gap between the two. When the damaged position is sealed in the reverse direction, the one-way sealing baffle will tightly abut against the slidable sealing ring to block the liquid. After the liquid inlet is blocked, the slidable sealing ring can be pushed to move to the damaged position for blocking, which is simple and convenient to operate; this design can be blocked without disassembling the high-temperature heat exchange tube, and does not affect production.

[0008] Preferably, a cleaning component for cleaning the inner surface of the high-temperature resistant heat exchange tube is provided on the slidable sealing ring located on the liquid inlet side, and the cleaning component includes a cleaning ring detachably connected to the side of the slidable sealing ring, and a cleaning rubber ring is provided on the side of the cleaning ring facing away from the slidable sealing ring, and the cleaning ring is detachably connected to the slidable sealing ring by bolts.

[0009] By adopting the above technical solution, when the slidable sealing ring slides in the high-temperature heat exchange tube, some impurities remaining on the inner wall of the high-temperature heat exchange tube can be scraped off, which can keep the inside of the high-temperature heat exchange tube in a relatively clean state and reduce the possibility of damage to the high-temperature heat exchange tube.

[0010] Preferably, the positioning and fixing component includes a slidable fixing ring which is sleeved on the outside of the high-temperature resistant heat exchange tube, and a magnetic attraction component is fixedly connected to the slidable fixing ring. A magnetic attraction component is also provided on the slidable sealing ring at a position corresponding to the slidable sealing ring. The slidable fixing ring and the slidable sealing ring are adsorbed on the outer surface of the high-temperature resistant heat exchange tube through the magnetic attraction component.

[0011] By adopting the above technical solution, a slidable fixing ring is sleeved on the outside of the high-temperature resistant heat exchange tube, so that when the internal slidable sealing ring needs to be fixed at any position, the slidable fixing ring can be controlled to move to the corresponding position. At this time, the magnetic suction component is used to position and fix it to prevent the internal slidable sealing ring from moving again, thereby achieving sealing of the damaged position of the high-temperature resistant heat exchange tube.

[0012] Preferably, there are multiple slidable fixing rings and they are sleeved on the high temperature resistant heat exchange tube. A support frame is arranged between adjacent slidable fixing rings. The support frame includes a supporting section and an adjusting section. The adjusting section can slide relative to the supporting section and be fixed at any position.

[0013] By adopting the above technical solution, when in use, first adjust the position of the slidable fixing ring, which can be the position determined after the slidable sealing ring is fixed by the slidable fixing ring, and then control the relative sliding of the supporting section and the adjusting section. At this time, the supporting frame becomes longer or shorter as a whole, and then continues to support the entire high-temperature resistant heat exchange tube as a whole, thereby improving the stability of the equipment.

[0014] Preferably, a socket is provided in the supporting section, the adjusting section can be inserted in the socket, a ratchet is fixedly connected to the adjusting section, and a pawl is hinged on the supporting section at a position corresponding to the ratchet.

[0015] By adopting the above technical solution, when it is necessary to extend the overall support frame, the pawl is rotated to allow the adjustment section to slide relative to the support section, thereby adjusting the relative positions of the two. The pawl is then rotated to clamp it on the ratchet of the adjustment section. During use, the support section and the adjustment section are always kept in a supporting state, thereby stably supporting the high-temperature heat exchange tubes of the adjacent bending sections, thereby increasing the strength of the high-temperature heat exchange tubes and improving the service life of the overall equipment.

[0016] Preferably, the slidable sealing ring is provided with an embedding groove adapted to the one-way sealing baffle, the one-way sealing baffle is an umbrella-shaped structure, and the cone of the one-way sealing baffle faces the liquid outlet of the high-temperature heat exchange tube.

[0017] By adopting the above technical solution and setting it into an umbrella-shaped structure, the blocking is made more stable.

[0018] Preferably, the slidable sealing ring is an open structure, and the first section is inserted into the tail end, and a rubber block is arranged between the tail of the slidable sealing ring, and the two ends of the rubber block are respectively connected to the head end and the tail end of the slidable sealing ring. The rubber block shrinks when cold so that the diameter of the slidable sealing ring is relatively reduced.

[0019] By adopting the above technical scheme, the head and tail ends of the slidable sealing ring can be plugged into each other, and a rubber block is arranged at the plug-in position. When the slidable sealing ring slides in the high-temperature heat exchange tube, the rubber block is in a stretched state under the high-temperature environment. At this time, the slidable sealing ring is tightly attached to the inner wall of the high-temperature heat exchange tube, and the overall sealing effect is the best. When it is necessary to drive the slidable sealing ring to move in a non-sealed state by liquid, the slidable sealing ring can slide and rotate freely in the high-temperature heat exchange tube; when it is necessary to seal the damaged position, the liquid temperature can be adjusted appropriately to facilitate the movement of the slidable sealing ring. When the temporary sealing is completed, the staff has already welded the damaged position. At this time, a liquid with a lower temperature can be injected into the liquid inlet or outlet to drive the slidable sealing ring at one end for the next use.

[0020] Preferably, a liquid inlet pressure detection sensor is provided at the liquid inlet of the high temperature heat exchange tube, a liquid outlet pressure detection sensor is provided at the liquid outlet of the high temperature heat exchange tube, and a positioning sensor is provided in the slidable sealing ring.

[0021] By adopting the above technical solution, the pressure of the two chambers separated by the slidable sealing ring can be detected by two air pressure detection sensors, so as to know whether the sealing position has been reached for sealing.

[0022] Preferably, a cleaning groove is provided at the bottom of the protective shell, and the cleaning groove is arc-shaped. A freely movable connecting block is connected to the supporting frame through a drag chain.

[0023] By adopting the above technical solution, a cleaning tank is provided to facilitate cleaning, and a connecting block is provided. Since the connecting block is in a free state and can swing, the liquid inside the protective shell will not settle, thereby improving the service life of the entire equipment.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the high-temperature tube heat exchanger is in working condition, high-temperature liquid flows in from the liquid inlet of the high-temperature heat exchange tube and flows out from the liquid outlet. When the high-temperature heat exchange tube is damaged at a certain position, in order not to affect production, the high-temperature liquid can be controlled to flow in from the liquid outlet of the high-temperature heat exchange tube, and the liquid inlet of the high-temperature heat exchange tube can be blocked. At this time, since the one-way conductive component can only conduct one way, the high-temperature liquid will drive the one-way conductive component to move in the high-temperature heat exchange tube, and the gas or liquid in the space between the one-way conductive component and the liquid inlet will flow out through the damaged position until the slidable sealing ring blocks the damaged position. At this time, the slidable sealing ring is fixed at this position by the positioning and fixing component, and then the work can be restarted. Due to the existence of the one-way conductive component, the liquid flows in from the liquid inlet of the high-temperature heat exchange tube and flows out at the liquid outlet, and it can work normally. This design can be blocked without disassembling the high-temperature heat exchange tube, and does not affect production.

[0025] 2. The head and tail ends of the slidable sealing ring can be plugged into each other, and a rubber block is set at the plug-in position. When the slidable sealing ring slides in the high-temperature heat exchange tube, the rubber block is in a stretched state under high temperature environment. At this time, the slidable sealing ring fits tightly on the inner wall of the high-temperature heat exchange tube, and the overall sealing effect is the best. When it is necessary to drive the slidable sealing ring to move in a non-sealed state by liquid, the slidable sealing ring can slide and rotate freely in the high-temperature heat exchange tube; when it is necessary to seal the damaged position, the liquid temperature can be adjusted appropriately to facilitate the movement of the slidable sealing ring. When the temporary sealing is completed, the staff has already welded the damaged position. At this time, a liquid with a lower temperature can be injected into the liquid inlet or outlet to drive the slidable sealing ring at one end for the next use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the embodiment.

[0027] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0028] Figure 3 It is a structural schematic diagram highlighting the connection method of the supporting section and the adjusting section in the embodiment.

[0029] Figure 4Schematic diagram of the structure of the slidable sealing ring in the embodiment.

[0030] Explanation of the reference numerals: 1. High temperature resistant heat exchange tube; 11. Slidable sealing ring; 12. Guide and conduction assembly; 121. One-way sealing baffle; 122. Connecting rod; 123. Block; 13. Cleaning assembly; 131. Cleaning ring; 132. Cleaning rubber ring; 14. Connecting bracket; 141. Support section; 142. Adjusting section; 143. Ratchet; 144. Paw; 15. Rubber block; 16. Positioning and fixing assembly; 161. Slidable fixing ring; 2. Protective shell; 21. Connecting block. DETAILED DESCRIPTION

[0031] In order to be able to understand the features and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present invention. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0032] The terms "first", "second", etc. in the description and claims of the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present invention described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the embodiments of the present invention, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0034] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0035] Unless otherwise specified, the term "plurality" means two or more and "plurality" means two or more.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention may be combined with each other.

[0037] The following is combined with Figure 1-4 This application is described in further detail.

[0038] The present application embodiment discloses a high temperature tubular heat exchanger. Figure 1-2 , including a high-temperature heat-resistant heat-exchange tube 1 and a protective shell 2 located outside the high-temperature heat-resistant heat-exchange tube 1, wherein the high-temperature heat-resistant heat-exchange tubes 1 are multiple and parallel to each other, the high-temperature heat-resistant heat-exchange tubes 1 are detachably connected to the inside of the protective shell 2 by bolts, and each high-temperature heat-resistant heat-exchange tube 1 is independent of each other, the high-temperature heat-resistant heat-exchange tube 1 has a liquid inlet and a liquid outlet, a slidable sealing ring 11 is arranged in the high-temperature heat-resistant heat-exchange tube 1, the initial position of the slidable sealing ring 11 is located at the liquid outlet of the high-temperature heat-resistant heat-exchange tube 1, annular sealing grooves parallel to each other are opened at both ends of the outer surface of the slidable sealing ring 11, and a sealing ring is arranged in the sealing groove. Under normal conditions, the slidable sealing ring 11 is tightly pressed against the inner surface of the high-temperature heat-resistant heat-exchange tube 1 through the sealing ring, and the contact surfaces of the two can be sealed, and a unidirectional conductive component is arranged on the slidable sealing ring 11, which can make the liquid in the high-temperature heat-resistant heat-exchange tube 1 flow from the liquid inlet to the liquid outlet. Liquid flows in from the outlet and flows out from the outlet. The one-way conduction component includes a connecting rod 122 fixedly connected to the slidable sealing ring 11 at a position close to the outlet and parallel to the length direction of the high-temperature heat exchange tube 1. A one-way sealing baffle 121 is arranged at a position of the slidable sealing ring 11 corresponding to the connecting rod 122. A through hole is opened at a position of the one-way sealing baffle 121 corresponding to the connecting rod 122, through which the connecting rod 122 passes and a rubber ring is used to seal the connection between the two. A gap is left between the outer ring of the one-way sealing baffle 121 and the inner wall of the high-temperature heat exchange tube 1, and a block 123 for limiting the one-way sealing baffle 121 is fixedly connected to the outer end of the connecting rod 122; an inlay groove adapted to the one-way sealing baffle 121 is opened on the slidable sealing ring 11, and the one-way sealing baffle 121 is an umbrella-shaped structure, and the cone of the one-way sealing baffle 121 faces the outlet of the high-temperature heat exchange tube 1.

[0039] When the high-temperature heat exchange tube 1 is damaged, the liquid inlet of the corresponding high-temperature heat exchange tube 1 is first blocked, and liquid is injected into the liquid outlet of the high-temperature heat exchange tube 1. At this time, the one-way sealing baffle 121 will slide along the connecting rod 122 until it fits on the side of the slidable sealing ring 11. At this time, the slidable sealing ring 11 and the one-way sealing baffle 121 will divide the high-temperature heat exchange tube 1 into two chambers. Liquid is continuously injected. At this time, the slidable sealing ring 11 located at the liquid outlet will move under the drive of pressure and finally stay at the damaged position to achieve sealing.

[0040] A positioning and fixing component 16 is provided between the slidable sealing ring 11 and the high-temperature heat exchange tube 1 to fix the slidable sealing ring 11 at any position in the high-temperature heat exchange tube 1. Specifically, the positioning and fixing component 16 includes a slidable fixing ring 161 sleeved on the outer ring surface of the high-temperature heat exchange tube 1, and a magnetic attraction component is provided on the slidable fixing ring 161 and the slidable sealing ring 11. The magnetic attraction component can be a strong magnet. When the slidable sealing ring 11 moves to a damaged position, the slidable fixing ring 161 and the slidable sealing ring 11 can be fixed at the corresponding worn position by an external strong magnet. At this time, liquid continues to be injected from the liquid inlet, and the slidable sealing ring 11 will not produce relative movement.

[0041] A cleaning component 13 for cleaning the inner surface of the high-temperature heat exchange tube 1 is arranged on the slidable sealing ring 11 located on the liquid inlet side, and the cleaning component 13 includes a cleaning ring 131 detachably connected to the side of the slidable sealing ring 11, and a cleaning rubber ring 132 is arranged on the side of the cleaning ring 131 away from the slidable sealing ring 11, and the cleaning ring 131 is detachably connected to the slidable sealing ring 11 by bolts; a liquid inlet air pressure detection sensor is arranged at the liquid inlet of the high-temperature heat exchange tube 1, a liquid outlet air pressure detection sensor is arranged at the liquid outlet of the high-temperature heat exchange tube 1, and a positioning sensor is arranged in the slidable sealing ring 11; a cleaning groove is arranged at the bottom of the protective shell 2, and the cleaning groove is arc-shaped, and a freely movable connecting block 21 is connected to the support frame 14 through a drag chain.

[0042] Reference Figure 3There are multiple slidable fixing rings 161, and a support frame 14 is arranged between two adjacent slidable fixing rings 161. The support frame 14 includes a support section 141 and an adjustment section 142. The adjustment section 142 can slide relative to the support section 141. The adjustment section 142 is hinged on one of the adjacent slidable fixing rings 161, and the support section 141 is hinged on the other adjacent slidable fixing ring 161. A socket is opened at one end of the support section 141, and the adjustment section 142 can be slidably connected to the support section 141 through the socket. 2 is fixedly connected with a ratchet 143, and a pawl 144 is hinged on the support section 141 at the position corresponding to the ratchet 143. Due to the matching structure of the pawl 144 and the ratchet 143, when one of the slidable fixing rings 161 positions and fixes the slidable sealing ring 11, the pawl 144 can be controlled to rotate to disengage. At this time, the angle of the support frame 14 relative to the high-temperature resistant heat exchange tube 1 will change, but the overall structure formed by the adjusting section 142 and the supporting section 141 is always in a supporting state, thereby improving the stability of the entire device.

[0043] Reference Figure 4 The slidable sealing ring 11 is an open structure and the first section is inserted into the tail end. A rubber block 15 is arranged between the tail of the slidable sealing ring 11. The two ends of the rubber block 15 are respectively connected to the head end and the tail end of the slidable sealing ring 11. The rubber block 15 shrinks when cold so that the slidable sealing ring 11 is directly relatively reduced. When it is necessary to seal the damaged position, the liquid temperature can be appropriately adjusted to facilitate the movement of the slidable sealing ring 11. When the temporary sealing is completed, the staff has already welded the damaged position. At this time, a liquid with a lower temperature can be injected into the liquid inlet or outlet to drive the slidable sealing ring 11 to one end of the high-temperature resistant heat exchange tube 1 for easy use next time.

[0044] 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 high-temperature tubular heat exchanger, comprising a high-temperature heat exchange tube (1) and a protective shell (2) outside the high-temperature heat exchange tube (1), wherein the high-temperature heat exchange tube (1) is detachably connected to the protective shell (2), and characterized in that: The high temperature heat exchange tube (1) is provided with a slidable sealing ring (11) which fits the high temperature heat exchange tube (1), and a one-way conducting component which enables the liquid in the high temperature heat exchange tube (1) to flow in one direction is provided on the slidable sealing ring (11), sealing grooves are provided at both ends of the outer ring surface of the slidable sealing ring (11), and a sealing ring is provided in the sealing groove, and a positioning and fixing component (16) which fixes the slidable sealing ring (11) at any position in the high temperature heat exchange tube (1) is provided between the slidable sealing ring (11) and the high temperature heat exchange tube (1); the one-way conducting component includes a one-way sealing baffle ( 121), a connecting rod (122) is provided between the one-way sealing baffle (121) and the slidable sealing ring (11), one end of the connecting rod (122) is fixed on the slidable sealing ring (11), a connecting through hole is opened on the one-way sealing baffle (121) at a position corresponding to the connecting rod (122), the connecting rod (122) passes through the connecting through hole and a stopper (123) is fixedly connected to the protruding end thereof, and when the one-way sealing baffle (121) is in contact with the slidable sealing ring (11), the connecting through hole is tightly in contact with the side wall of the slidable sealing ring (11).

2. A high temperature tubular heat exchanger according to claim 1, characterized in that: A cleaning component (13) for cleaning the inner surface of the high-temperature resistant heat exchange tube (1) is arranged on the slidable sealing ring (11) located on the liquid inlet side. The cleaning component (13) comprises a cleaning ring (131) detachably connected to the side of the slidable sealing ring (11). A cleaning rubber ring (132) is arranged on the side of the cleaning ring (131) facing away from the slidable sealing ring (11). The cleaning ring (131) is detachably connected to the slidable sealing ring (11) by bolts.

3. A high temperature tubular heat exchanger according to claim 1, characterized in that: The positioning and fixing component (16) comprises a slidable fixing ring (131) sleeved on the outside of the high-temperature resistant heat exchange tube (1), a magnetic attraction component is fixedly connected to the slidable fixing ring (131), and a magnetic attraction component is also provided on the slidable sealing ring (11) at a position corresponding to the slidable sealing ring (11), and the slidable fixing ring (131) and the slidable sealing ring (11) are adsorbed on the outer surface of the high-temperature resistant heat exchange tube (1) through the magnetic attraction component.

4. A high temperature tubular heat exchanger according to claim 1, characterized in that: The slidable fixing rings (131) are multiple and are sleeved on the high-temperature resistant heat exchange tube (1). A support frame (14) is arranged between adjacent slidable fixing rings (131). The support frame (14) comprises a supporting section (141) and an adjusting section (142). The adjusting section (142) can slide relative to the supporting section (141) and be fixed at any position.

5. A high temperature tube heat exchanger according to claim 4, characterized in that: The support section (141) is provided with a socket, the adjustment section (142) can be inserted into the socket, the adjustment section (142) is fixedly connected with a ratchet (143), and the support section (141) is hinged with a ratchet pawl (144) at a position corresponding to the ratchet (143).

6. A high temperature tube heat exchanger according to claim 1, characterized in that: The slidable sealing ring (11) is provided with an embedding groove adapted to fit the one-way sealing baffle (121); the one-way sealing baffle (121) is an umbrella-shaped structure; the taper of the one-way sealing baffle (121) faces the liquid outlet of the high-temperature resistant heat exchange tube (1).

7. A high temperature tube heat exchanger according to claim 1, characterized in that: The slidable sealing ring (11) is an open structure, and the first section is inserted into the tail end. A rubber block (15) is arranged between the tail end of the slidable sealing ring (11), and the two ends of the rubber block (15) are respectively connected to the first end of the slidable sealing ring (11) and the tail end of the slidable sealing ring (11). The rubber block (15) shrinks when cooled so that the diameter of the slidable sealing ring (11) is relatively reduced.

8. The high temperature tube heat exchanger according to claim 1, characterized in that: A liquid inlet pressure detection sensor is provided at the liquid inlet of the high temperature heat exchange tube (1), a liquid outlet pressure detection sensor is provided at the liquid outlet of the high temperature heat exchange tube (1), and a positioning sensor is provided in the slidable sealing ring (11).

9. The high temperature tube heat exchanger according to claim 1, characterized in that: A cleaning groove is provided at the bottom of the protective shell (2), and the cleaning groove is in an arc shape. A freely movable connecting block (21) is connected to the supporting frame (14) via a drag chain.

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