Anti-scaling efficient heat exchanger

Abstract

The invention discloses an anti-scaling efficient heat exchanger which comprises a multi-section heat exchanger formed by detachably connecting a baffling heat exchange section, a straight-through heat exchange section and a tubular heat exchange section. A first heat exchange channel used for circulation of a first heat exchange medium is formed in the communicated interior of the baffling heat exchange section, the straight-through heat exchange section and the tubular heat exchange section, the baffling heat exchange section is provided with a first inlet allowing the first heat exchange medium to enter, and the tubular heat exchange section is provided with a first outlet used for discharging the first heat exchange medium. A communicated second heat exchange channel used for circulation of a second heat exchange medium is formed among the baffling heat exchange section, the straight-through heat exchange section and the tubular heat exchange section, the baffling heat exchange section is provided with a second inlet allowing the second heat exchange medium to enter, and the tubular heat exchange section is provided with a second outlet used for discharging the second heat exchange medium; when dirt appears on a certain section, only the certain section needs to be disassembled, a certain area can be independently disassembled in a targeted mode, the heat exchanger can be cleaned or maintained timely and rapidly, and corrosion of the dirt to the pipe wall is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of heat exchangers, and specifically relates to an anti-scaling and high-efficiency heat exchanger. Background Art

[0002] As an important heat exchange equipment, shell and tube heat exchangers are widely used in the field of petrochemical production, and their heat exchange performance has a great impact on the process flow in these fields. At present, due to factors such as shell-side media and operating habits, the scaling of shell and tube heat exchangers has increased significantly, resulting in increased heat transfer resistance and reduced heat transfer performance; in addition, the corrosive media in the scale can easily corrode the metal tube wall, causing perforation or cracks, that is, the shell and tube heat exchanger leaks, causing material contamination and affecting the safe operation of the heat exchanger.

[0003] In addition, when maintaining the heat exchanger, in order to clean dirt or perform local repairs on the heat exchanger, the entire movement, including the internal heat exchange tubes, plates and other structures, needs to be pulled out for high-pressure cleaning and descaling, which is time-consuming and labor-intensive, and it is impossible to clean the area where the problem of the heat exchanger occurs separately. Since the heat exchanger occupies a large area and has a large volume, if it is completely disassembled for repair or cleaning, it will not only increase the amount of repair or cleaning work, but also increase labor intensity and reduce the efficiency of repair or cleaning. In addition, frequent and repeated disassembly and assembly will increase the probability of repair of the heat exchanger and reduce the service life of the heat exchanger. Summary of the invention

[0004] The present application provides an anti-scaling and high-efficiency heat exchanger to solve the above-mentioned technical problem that due to factors such as shell-side media and operating habits, there is too much scaling inside the heat exchanger, which increases the heat transfer thermal resistance and reduces the heat transfer performance. The scale will corrode the metal pipe wall, causing gaps or holes in the pipe wall and thus cause leakage accidents. In addition, traditional heat exchangers are long and large in size, and it is very troublesome to clean the scale. The entire heat exchanger needs to be dismantled, and it is impossible to effectively dismantle a certain area separately, which is time-consuming, labor-intensive and increases labor intensity.

[0005] The technical solution adopted in this application is:

[0006] An anti-scaling high-efficiency heat exchanger, comprising a multi-section heat exchanger formed by detachably connecting a baffle heat exchange section, a straight heat exchange section and a tubular heat exchange section;

[0007] The baffle heat exchange section, the straight heat exchange section and the tubular heat exchange section are connected to each other and have a first heat exchange channel for the circulation of a first heat exchange medium; the baffle heat exchange section has a first inlet for the first heat exchange medium to enter, and the tubular heat exchange section has a first outlet for the first heat exchange medium to be discharged;

[0008] A second heat exchange channel for the circulation of a second heat exchange medium is formed between the baffle heat exchange section, the straight heat exchange section and the tubular heat exchange section. The baffle heat exchange section has a second inlet for the second heat exchange medium to enter, and the tubular heat exchange section has a second outlet for the second heat exchange medium to discharge.

[0009] The anti-scaling high-efficiency heat exchanger of the present application also has the following additional technical features:

[0010] The first inlet is connected to an inlet pipe, and the first outlet is connected to an outlet pipe; the inlet pipe is a corrugated pipe or a twisted pipe, and / or the outlet pipe is a corrugated pipe or a twisted pipe.

[0011] The inlet of the baffle heat exchange section is connected to the straight heat exchange section through a first heat exchange component, and the outlet of the straight heat exchange section is connected to the tubular heat exchange section through a second heat exchange component; the second heat exchange medium enters the baffle heat exchange section through the first inlet, enters the straight heat exchange section through the first heat exchange component, enters the tubular heat exchange section through the second heat exchange component, and is discharged through the first outlet to form a heat exchange path for the second heat exchange medium.

[0012] The first heat exchange component includes a first connecting pipe, a first elbow and a second connecting pipe; the first connecting pipe is connected to the first connecting port of the baffle heat exchange section, the second connecting pipe is connected to the inlet of the straight heat exchange section, and a first elbow is connected between the first connecting pipe and the second connecting pipe; the second heat exchange component includes a third connecting pipe, a second elbow and a fourth connecting pipe; the third connecting pipe is connected to the discharge port of the straight heat exchange section, the fourth connecting pipe is connected to the second connecting port of the tubular heat exchange section, and a second elbow is connected between the third connecting pipe and the fourth connecting pipe.

[0013] The baffle heat exchange section includes a baffle heat exchange shell, an end plate, a baffle and a plurality of first heat exchange tubes; the end plate is connected to the inside of the baffle heat exchange shell to divide the baffle heat exchange shell into a first chamber connected to a first inlet and a second chamber connected to a second inlet along a flow direction; one end of the plurality of first heat exchange tubes can be connected to the first chamber by being installed on the end plate, and the first heat exchange medium can enter the first heat exchange tube through the first chamber, and the other end of the plurality of first heat exchange tubes is installed on the end of the baffle heat exchange shell; the baffle is connected to the first heat exchange tube at intervals along the flow direction of the baffle heat exchange shell to form a guide for the second heat exchange medium.

[0014] The baffle is connected to the baffle heat exchange section and extends in a spiral shape along the flow direction of the baffle heat exchange section; and / or, a plurality of the baffles are arranged in the baffle heat exchange section and are spaced apart along the flow direction perpendicular to the baffle heat exchange section; the baffle is connected to at least a portion of the first heat exchange tube along the radial direction of the baffle heat exchange section.

[0015] The straight-through heat exchange section includes a straight-through heat exchange shell, a filter screen and a plurality of second heat exchange tubes; the straight-through heat exchange shell is connected to the baffle heat exchange section through a connector; the filter screen is connected to the straight-through heat exchange shell so that the second heat exchange medium flowing from the baffle heat exchange section is filtered by the filter screen and then flows to the tubular heat exchange section; a plurality of second heat exchange tubes are connected to the straight-through heat exchange shell along the flow direction of the straight-through heat exchange shell, and one end of the second heat exchange tube extends to the end of the straight-through heat exchange shell to communicate with the outside.

[0016] The end surface of the baffle heat exchange section facing the straight heat exchange section has a groove, and the end surface of the straight heat exchange section facing the baffle heat exchange section has a protrusion; or, the end surface of the baffle heat exchange section facing the straight heat exchange section has a protrusion, and the end surface of the straight heat exchange section facing the baffle heat exchange section has a groove; the baffle heat exchange section and the straight heat exchange section are butt-connected by matching the protrusion and the groove, so that the first heat exchange tube and the second heat exchange tube are butt-connected.

[0017] The tubular heat exchange section includes a tubular heat exchange shell, a partition and a plurality of third heat exchange tubes; the partition is connected to the tubular heat exchange shell to divide the tubular heat exchange shell into a first cavity connected to a first outlet and a second cavity connected to a second outlet along a flow direction; one end of the plurality of third heat exchange tubes can be installed on the end of the tubular heat exchange shell, and the other end can be installed on the partition to be connected to the first cavity.

[0018] The end surface of the straight-through heat exchange section facing the tubular heat exchange section has a groove, and the end surface of the tubular heat exchange section facing the straight-through heat exchange section has a protrusion; or, the end surface of the straight-through heat exchange section facing the tubular heat exchange section has a protrusion, and the end surface of the tubular heat exchange section facing the straight-through heat exchange section has a groove; the straight-through heat exchange section and the tubular heat exchange section are butt-connected by matching the protrusion and the groove, so that the second heat exchange tube is connected to the third heat exchange tube.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0020] 1. An anti-scaling high-efficiency heat exchanger, comprising a multi-section heat exchanger formed by detachably connecting a baffle heat exchange section, a straight heat exchange section and a tubular heat exchange section; the baffle heat exchange section, the straight heat exchange section and the tubular heat exchange section are connected to each other and have a first heat exchange channel for the circulation of a first heat exchange medium, the baffle heat exchange section has a first inlet for the first heat exchange medium to enter, and the tubular heat exchange section has a first outlet for the first heat exchange medium to be discharged; a second heat exchange channel for the circulation of a second heat exchange medium is formed between the baffle heat exchange section, the straight heat exchange section and the tubular heat exchange section, the baffle heat exchange section has a second inlet for the second heat exchange medium to enter, and the tubular heat exchange section has a second outlet for the second heat exchange medium to be discharged.

[0021] The baffle heat exchange section, the straight heat exchange section and the tubular heat exchange section can be detachably connected to form a multi-section heat exchanger, so that any section of the heat exchanger can be disassembled and assembled at will. When a section is fouled, only that section needs to be disassembled, and all structures of the heat exchanger, including the internal movement, do not need to be disassembled, which effectively reduces the amount of engineering work. A specific area can be disassembled and assembled separately, and the heat exchanger can be cleaned or repaired in a timely and rapid manner to avoid corrosion of the tube wall by dirt. Moreover, cleaning and repairing only the area where dirt appears can not only reduce the labor intensity of the workers, but also more accurately replace and repair the damaged or fouled area, thereby improving work efficiency. It also avoids damage to the heat exchanger structure caused by repeated disassembly and assembly due to frequent disassembly and cleaning, which can greatly reduce damage to the heat exchanger, thereby increasing the service life of the heat exchanger.

[0022] In order to further improve the heat exchange performance of the heat exchanger, a first heat exchange channel with a tube-type for the circulation of the first heat exchange medium is formed inside the baffle heat exchange section, the straight heat exchange section and the tubular heat exchange section, and the shell side formed by connecting the baffle heat exchange section, the straight heat exchange section and the tubular heat exchange section serves as a second heat exchange channel for the second heat exchange medium, thereby achieving convection heat exchange between the first heat exchange medium in the first heat exchange channel and the second heat exchange medium in the second heat exchange channel, thereby realizing the heat exchange function of the heat exchanger.

[0023] 2. As a preferred embodiment of the present application, the first inlet is connected to an inlet pipe, and the first outlet is connected to an outlet pipe; the inlet pipe is a corrugated pipe or a twisted pipe, and / or the outlet pipe is a corrugated pipe or a twisted pipe.

[0024] The first inlet is the first inlet for the first heat exchange medium to enter the heat exchanger. The first inlet is connected to the inlet pipe, and the purpose of using a corrugated pipe or a twisted pipe for the inlet pipe is to be able to achieve the fall-off of the initially formed scale layer at the first inlet position and not continue to enter the interior of the baffle heat exchanger, thereby greatly reducing the probability of entering the interior of the heat exchanger, thereby preventing the initial scale layer from continuing to generate scale during the subsequent flow process, thereby reducing the probability of scale generation, reducing the scale content inside the heat exchanger, and facilitating the stable operation of the heat exchanger;

[0025] Among them, a bellows is used as the inlet pipe. Due to the change of the tube bundle interface of the bellows, the fluid inside and outside the tube is strongly disturbed, forming a good flushing, and it is not easy to form a scale layer on the tube wall. At the same time, due to the large change in the curvature of the inner and outer surfaces of the bellows, it has elasticity. For the bellows itself, these bellows play a role similar to the expansion joint of the heat exchanger. Under the action of temperature difference and turbulent flow of the medium, even if scaling occurs, the scale layer formed can be easily impacted and fall off confidently, so that the bellows has a strong anti-scaling ability and avoids corrosion and clogging at the same time; the first inlet used in this application can prevent the initially formed scale from entering the interior of the heat exchanger, thereby reducing the probability of scale formation;

[0026] The inlet pipe can also be made of twisted pipe, because the spiral flow channel structure formed by the twisted pipe can eliminate the dead zone of flow, and under the flushing effect of turbulent fluid, it has a self-cleaning function and is not easy to scale. At the same time, because the fluid no longer flushes the tube bundle horizontally, it can also support each other through the tangent point. During use, the tube bundle will not produce induced vibration, avoiding the problem of tube perforation caused by friction, so it has a long service life and high reliability.

[0027] 3. As a preferred embodiment of the present application, the inlet of the folding heat exchange section is connected to the straight heat exchange section through a first heat exchange component, and the outlet of the straight heat exchange section is connected to the tubular heat exchange section through a second heat exchange component; the second heat exchange medium enters the folding heat exchange section through the first inlet, passes through the first heat exchange component, enters the straight heat exchange section, enters the tubular heat exchange section through the second heat exchange component, and is discharged through the first outlet to form a heat exchange path for the second heat exchange medium.

[0028] The baffle heat exchange section is connected to the straight heat exchange section through a first heat exchange component, and the straight heat exchange section is connected to the tubular heat exchange section through a second heat exchange component, so that a connecting passage is formed between the baffle heat exchange section and the tubular heat exchange section, thereby facilitating the second heat exchange medium to flow in this passage to form a heat exchange path for the second heat exchange medium.

[0029] 4. As a preferred embodiment of the present application, the first heat exchange component includes a first connecting pipe, a first elbow and a second connecting pipe; the first connecting pipe is connected to the first connecting port of the folding heat exchange section, the second connecting pipe is connected to the inlet of the straight heat exchange section, and the first elbow is connected between the first connecting pipe and the second connecting pipe; the first heat exchange component includes a third connecting pipe, a second elbow and a fourth connecting pipe; the third connecting pipe is connected to the discharge port of the straight heat exchange section, the fourth connecting pipe is connected to the second connecting port of the tubular heat exchange section, and the second elbow is connected between the third connecting pipe and the fourth connecting pipe.

[0030] The first connecting pipe is connected to the first elbow and the second connecting pipe to form a three-section structure. The purpose is to connect the baffle heat exchange section to the straight heat exchange section externally, so as to increase the heat exchange circulation path and facilitate disassembly and assembly. The first connecting pipe is used to connect to the baffle heat exchange section, the second connecting pipe is used to connect to the straight heat exchange section, and the first connecting pipe and the second connecting pipe are connected by the first elbow. Since the first connecting pipe and the second connecting pipe are in a parallel state, in order to avoid the vortex flow of the fluid medium in the part where the first connecting pipe and the second connecting pipe are connected, because this vortex flow will produce inertial force and resistance to the fluid in the pipeline, thereby causing energy loss and increased flow resistance. At the same time, due to the change in flow velocity, it will also cause uneven flow velocity and stratification of the fluid, and these problems will affect the transmission efficiency and operation stability of the pipeline. Therefore, the first connecting pipe and the second connecting pipe are connected by a first elbow at a certain angle, so that the fluid medium can pass smoothly in the pipe, reduce energy loss and flow resistance, and improve heat exchange efficiency.

[0031] 5. As a preferred embodiment of the present application, the baffle heat exchange section includes a baffle heat exchange shell, an end plate, a baffle and a plurality of first heat exchange tubes; the end plate is connected to the baffle heat exchange shell to divide the baffle heat exchange shell into a first chamber connected to the first inlet and a second chamber connected to the second inlet along the flow direction; one end of the plurality of first heat exchange tubes can be connected to the first chamber by being installed on the end plate, and the first heat exchange medium can enter the first heat exchange tube through the first chamber, and the other end of the plurality of first heat exchange tubes is installed on the end of the baffle heat exchange shell; the baffle is connected to the first heat exchange tubes at intervals along the flow direction of the baffle heat exchange shell to form a guide for the second heat exchange medium.

[0032] The part of the first heat exchange channel located in the baffle heat exchange section is formed by a plurality of first heat exchange tubes arranged in the baffle heat exchange section, and the interior of the baffle heat exchange section is divided into a first chamber and a second chamber by an end plate, and the first chamber is connected to the first inlet, and the first heat exchange medium first enters the first chamber through the first inlet, and the solid in the solid-liquid mixed state in the first heat exchange medium can be blocked to a certain extent under the blocking effect of the end plate, so that sludge and the like can not enter the second chamber under the blocking effect of the end plate, and the fluid part can enter the first heat exchange tube located in the second chamber through the first heat exchange tube connected to the end plate. The second chamber can be connected to the second inlet, so that the second heat exchange medium can directly flow into the space inside the tube located outside the first heat exchange tube in the second chamber through the second inlet, and flow toward the straight heat exchange section under the guidance of the baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0034] Figure 1 This is a front view structural schematic diagram of an anti-scaling high-efficiency heat exchanger according to one implementation mode of the present application;

[0035] Figure 2 A schematic diagram of a top view of an anti-scaling high-efficiency heat exchanger according to an implementation mode of the present application;

[0036] In the figure,

[0037] 1. Baffle heat exchange section; 2. Straight heat exchange section; 3. Tubular heat exchange section; 4. First inlet; 5. First outlet; 6. Second inlet; 7. Second outlet; 8. Inlet pipe; 9. Outlet pipe; 10. First connecting port; 11. Second connecting port; 12. Inlet port; 13. Outlet port;

[0038] 14. first heat exchange component; 141. first connecting pipe; 142. first elbow; 143. second connecting pipe;

[0039] 15. second heat exchange assembly; 151. third connecting pipe; 152. second elbow; 153. fourth connecting pipe;

[0040] 16. baffle heat exchange shell; 17. end plate; 18. baffle; 19. first heat exchange tube; 20. straight heat exchange shell; 21. filter screen; 22. second heat exchange tube; 23. tubular heat exchange shell; 24. partition; 25. third heat exchange tube; 26. skid frame; 27. first chamber; 28. second chamber; 29. ​​first cavity; 30. second cavity. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0043] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0046] An anti-scaling and high-efficiency heat exchanger, such as Figure 1-2As shown, a multi-section heat exchanger is formed by detachably connecting a baffle heat exchange section 1, a straight heat exchange section 2 and a tubular heat exchange section 3; the baffle heat exchange section 1, the straight heat exchange section 2 and the tubular heat exchange section 3 are connected to each other and have a first heat exchange channel for the circulation of a first heat exchange medium, the baffle heat exchange section 1 has a first inlet 4 for the first heat exchange medium to enter, and the tubular heat exchange section 3 has a first outlet 5 for the first heat exchange medium to be discharged; a second heat exchange channel for the circulation of a second heat exchange medium is formed between the baffle heat exchange section 1, the straight heat exchange section 2 and the tubular heat exchange section 3, the baffle heat exchange section 1 has a second inlet 6 for the second heat exchange medium to enter, and the tubular heat exchange section 3 has a second outlet 7 for the second heat exchange medium to be discharged.

[0047] The baffle heat exchange section 1, the straight heat exchange section 2 and the tubular heat exchange section 3 are detachably connected to form a multi-section heat exchanger, so that any section of the heat exchanger can be disassembled and assembled at will. When a section is fouled, only that section needs to be disassembled, and all structures of the heat exchanger, including the internal movement, do not need to be disassembled, which effectively reduces the amount of engineering work, and allows for targeted separate disassembly and assembly of a certain area, and timely and rapid cleaning or repair of the heat exchanger to avoid corrosion of the tube wall by dirt; and cleaning and repairing only the area where dirt appears can not only reduce the labor intensity of the workers, but also more accurately replace and repair the damaged or fouled area, thereby improving work efficiency; it also avoids damage to the heat exchanger structure caused by repeated disassembly and assembly due to frequent disassembly and cleaning, which can greatly reduce damage to the heat exchanger, thereby increasing the service life of the heat exchanger;

[0048] In order to further improve the heat exchange performance of the heat exchanger, a first heat exchange channel with a tube-type for the circulation of the first heat exchange medium is formed inside the baffle heat exchange section 1, the straight heat exchange section 2 and the tubular heat exchange section 3, and the shell side formed by connecting the baffle heat exchange section 1, the straight heat exchange section 2 and the tubular heat exchange section 3 is used as a second heat exchange channel for the second heat exchange medium, thereby achieving convection heat exchange between the first heat exchange medium in the first heat exchange channel and the second heat exchange medium in the second heat exchange channel, thereby realizing the heat exchange function of the heat exchanger.

[0049] It should be noted that the baffle heat exchange section 1 and the straight heat exchange section 2, and the straight heat exchange section 2 and the tubular heat exchange section 3 are connected via flanges, and the flange end faces are connected with sealing gaskets or sealing rings.

[0050] As a preferred embodiment, the first inlet 4 is connected to an inlet pipe 8, and the first outlet 5 is connected to an outlet pipe 9; the inlet pipe 8 is a corrugated pipe or a twisted pipe, and / or the outlet pipe 9 is a corrugated pipe or a twisted pipe.

[0051] The first inlet 4 is the first inlet for the first heat exchange medium to enter the heat exchanger. The first inlet 4 is connected to the inlet pipe 8. The purpose of using a corrugated pipe or a twisted pipe for the inlet pipe 8 is to be able to remove the initially formed scale layer at the first inlet 4 and not continue to enter the interior of the baffle heat exchanger, thereby greatly reducing the probability of entering the interior of the heat exchanger, thereby preventing the initial scale layer from continuing to generate scale during the subsequent flow process, thereby reducing the probability of scale generation, reducing the scale content inside the heat exchanger, and facilitating the stable operation of the heat exchanger;

[0052] Among them, a bellows is used as the inlet pipe 8. Due to the change of the tube bundle interface of the bellows, the fluid inside and outside the tube is strongly disturbed, forming a good flushing, and it is not easy to form a scale layer on the tube wall. At the same time, due to the large change in the curvature of the inner and outer surfaces of the bellows, it has elasticity. For the bellows itself, these bellows play a role similar to the expansion joint of the heat exchanger. Under the action of temperature difference and turbulent flow of the medium, even if scaling occurs, the scale layer formed can be easily impacted and fall off confidently, so that the bellows has a strong anti-scaling ability and avoids corrosion and clogging. The first inlet 4 used in this application can prevent the initially formed scale from entering the interior of the heat exchanger, thereby reducing the probability of scale formation;

[0053] The inlet pipe 8 may also be a twisted pipe, because the spiral flow channel structure formed by the twisted pipe can eliminate the flow dead zone, and under the flushing action of the turbulent fluid, it has a self-cleaning function and is not easy to scale. At the same time, because the fluid no longer flushes the tube bundle laterally, it can also support each other through the tangent point. During use, the tube bundle will not produce induced vibration, avoiding the problem of tube perforation caused by friction, so that the service life is long and the reliability is high.

[0054] As a preferred embodiment, the inlet 12 of the baffle heat exchange section 1 and the straight heat exchange section 2 is connected through the first heat exchange component 14, and the outlet 13 of the straight heat exchange section 2 is connected to the tubular heat exchange section 3 through the second heat exchange component 15; the second heat exchange medium enters the baffle heat exchange section 1 through the first inlet 4, passes through the first heat exchange component 14, enters the straight heat exchange section 2, enters the tubular heat exchange section 3 through the second heat exchange component, and is discharged through the first outlet 5 to form a heat exchange path for the second heat exchange medium.

[0055] The baffle heat exchange section 1 is connected to the straight heat exchange section 2 via a first heat exchange component 14, and the straight heat exchange section 2 is connected to the tubular heat exchange section 3 via a second heat exchange component 15, so that a connecting passage is formed between the baffle heat exchange section 1 and the tubular heat exchange section 3, thereby facilitating the circulation of the second heat exchange medium in this passage to form a heat exchange path for the second heat exchange medium.

[0056] As a preferred embodiment, the first heat exchange component 14 includes a first connecting pipe 141, a first elbow 142 and a second connecting pipe 143; the first connecting pipe 141 is connected to the first connecting port 10 of the folding heat exchange section 1, the second connecting pipe 143 is connected to the inlet 12 of the straight heat exchange section 2, and the first elbow 142 is connected between the first connecting pipe 141 and the second connecting pipe 143; the second heat exchange component 15 includes a third connecting pipe 151, a second elbow 152 and a fourth connecting pipe 153; the third connecting pipe 151 is connected to the discharge port 13 of the straight heat exchange section 2, the fourth connecting pipe 153 is connected to the second connecting port 11 of the tubular heat exchange section 3, and the second elbow 152 is connected between the third connecting pipe 151 and the fourth connecting pipe 153.

[0057] The first connecting pipe 141, the first elbow 142 and the second connecting pipe 143 are connected to form a three-section structure, the purpose of which is to increase the heat exchange flow path when the baffle heat exchange section 1 is externally connected to the straight heat exchange section 2, and to facilitate disassembly and assembly, wherein the first connecting pipe 141 is used to connect to the baffle heat exchange section 1, the second connecting pipe 143 is used to connect to the straight heat exchange section 2, and the first connecting pipe 141 and the second connecting pipe 143 are connected through the first elbow 142. Since the first connecting pipe 141 and the second connecting pipe 143 are in a parallel state, in order to avoid the occurrence of vortex flow in the part where the fluid medium connects between the first connecting pipe 141 and the second connecting pipe 143, because this vortex flow will generate inertial force and resistance to the fluid in the pipeline, thereby causing energy loss and increased flow resistance. At the same time, due to the change in flow velocity, it will also cause uneven flow velocity and stratification of the fluid, and these problems will affect the transmission efficiency and operation stability of the pipeline. Therefore, the first connecting pipe 141 and the second connecting pipe 143 are connected by the first elbow pipe 142 at a certain angle, so that the fluid medium can pass smoothly in the pipe, reducing energy loss and flow resistance and improving heat exchange efficiency.

[0058] Similarly, the third connecting pipe 151, the second elbow 152 and the fourth connecting pipe 153 are connected to form a three-section structure, the purpose of which is to increase the heat exchange flow path when the straight-through heat exchange section 2 is externally connected to the tubular heat exchange section 3, and to facilitate disassembly and assembly. The third connecting pipe 151 is used to connect to the straight-through heat exchange section 2, and the fourth connecting pipe 153 is used to connect to the tubular heat exchange section 3.

[0059] Furthermore, the first connecting pipe 141, the second connecting pipe 143, the third connecting pipe 151 and the fourth connecting pipe 153 adopt a straight pipe structure; the third connecting pipe 151 and the second curved pipe 152, and the second curved pipe 152 and the fourth connecting pipe 153 are connected by flanges, and the flange end faces are connected with sealing gaskets or sealing rings.

[0060] Furthermore, the first bend 142 and the second bend 152 adopt a U-shaped tube structure, so that the first bend 142 has a 180° elbow; specifically, the outer peripheral surfaces of the first bend 142 and the second bend 152 form a smooth arc surface; or, the first bend 142 and the second bend 152 form a right-angle structure at the U-shaped corner.

[0061] As a preferred embodiment, the baffle heat exchange section 1 includes a baffle heat exchange shell 16, an end plate 17, a baffle 18 and a plurality of first heat exchange tubes 19; the end plate 17 is connected to the baffle heat exchange shell 16 to divide the baffle heat exchange shell 16 into a first chamber 27 connected to the first inlet 4 and a second chamber 28 connected to the second inlet 6 along the flow direction; one end of the plurality of first heat exchange tubes 19 can be connected to the first chamber 27 by being installed on the end plate 17, and the first heat exchange medium can enter the first heat exchange tube 19 through the first chamber 27, and the other end of the plurality of first heat exchange tubes 19 is installed on the end of the baffle heat exchange shell 16; the baffle 18 is connected to the first heat exchange tube 19 at intervals along the flow direction of the baffle heat exchange shell 16 to form a guide for the second heat exchange medium.

[0062] The part of the first heat exchange channel located in the baffle heat exchange section 1 is formed by a plurality of first heat exchange tubes 19 arranged in the baffle heat exchange section 1, and the interior of the baffle heat exchange section 1 is divided into a first chamber 27 and a second chamber 28 by the end plate 17, and the first chamber 27 is connected to the first inlet 4, and the first heat exchange medium first enters the first chamber 27 through the first inlet 4, and the solid in the solid-liquid mixed state in the first heat exchange medium can be blocked to a certain extent under the blocking effect of the end plate 17, so that the sludge and the like can not enter the second chamber 28 under the blocking effect of the end plate 17, and the fluid part can enter the first heat exchange tube 19 located in the second chamber 28 through the first heat exchange tube 19 connected to the end plate 17. The second chamber 28 can be connected to the second inlet 6, so that the second heat exchange medium can directly flow into the space inside the tube located in the second chamber 28 outside the first heat exchange tube 19 through the second inlet 6, and flow toward the straight heat exchange section 2 under the guidance of the baffle 18.

[0063] The structure and arrangement of the baffle 18 are not limited to the methods listed in this application. Specifically, any of the following implementations may be adopted:

[0064] In the first embodiment, the baffle 18 is connected to the baffle heat exchange section 1 and extends in a spiral shape along the flow direction of the baffle heat exchange section 1 ; the baffle 18 is connected to at least a portion of the first heat exchange tube 19 along the radial direction of the baffle heat exchange section 1 .

[0065] The spiral baffle 18 can overcome the problem of the back-and-forth flow mode brought by the traditional bow-shaped baffle 18, and there will be no dead zone of flow due to insufficient flushing. Because the heat exchange system in the dead zone is very low, it is easy to lead to low utilization of the heating surface, resulting in a decrease in the overall heat transfer coefficient. In addition, the existence of the dead zone is prone to fouling, affecting the service life of the heat exchanger. The use of the spiral baffle 18 can reduce the flow dead zone and fouling dead corners. The second heat exchange medium of the shell side in the spiral channel is in a continuous spiral plunger flow state. Particulate matter and sediment can be flushed away along the upper surface of the baffle 18, thereby reducing the fouling rate and extending the cleaning cycle and service life of the heat exchanger.

[0066] In the second embodiment, a plurality of baffles 18 are disposed in the baffle heat exchange section 1 and are spaced apart along a flow direction perpendicular to the baffle heat exchange section 1 ; the baffles 18 are connected to at least a portion of the first heat exchange tubes 19 along a radial direction of the baffle heat exchange section 1 .

[0067] The cross-section of the baffle 18 is a multi-section structure, which can be a wavy curve structure or a multi-section folding structure. The length direction of the baffle 18 is distributed along the axial direction of the baffle heat exchange section 1. A plurality of baffles 18 are arranged in the radial direction of the baffle heat exchange section 1, so that the second heat exchange medium entering the baffle heat exchange section 1 can enhance the disturbance ability between the constantly changing interfaces of the plurality of baffles 18, thereby causing the dirt to fall off. By opening an opening connected to the external collection box at the lowest point of the heat exchanger, the impurities accumulated in the heat exchanger can be discharged.

[0068] In the third embodiment, the baffle plate 18 is connected to the baffle heat exchange section 1 and extends in a spiral shape along the flow direction of the baffle heat exchange section 1 to occupy a partial area within the baffle heat exchange section 1. A plurality of baffle plates 18 are arranged in the baffle heat exchange section 1 and are spaced apart along the flow direction perpendicular to the baffle heat exchange section 1 to occupy the remaining area within the baffle heat exchange section 1.

[0069] In the third embodiment, two types of baffles 18 are used, including a spiral baffle 18 and a baffle 18 with a multi-stage structure, so that the second heat exchange medium can flow between the spiral baffle 18 and the multi-stage baffle 18, and the second heat exchange medium can be in a spiral plunger flow state and a curved disturbance state, thereby increasing the disturbance to the second heat exchange medium, increasing the rate at which particulate matter and sediment in the second heat exchange medium can be washed away along the upper surface of the baffle 18, and also increasing the flow area of ​​the second heat exchange medium, thereby extending the heat exchange time of the second heat exchange medium and enhancing the heat exchange capacity of the second heat exchange medium.

[0070] As a preferred embodiment, the straight-through heat exchange section 2 includes a straight-through heat exchange shell 20, a filter screen 21 and a plurality of second heat exchange tubes 22; the straight-through heat exchange shell 20 is connected to the baffle heat exchange section 1 through a connecting piece; the filter screen 21 is connected to the straight-through heat exchange shell 20, so that the second heat exchange medium flowing in from the baffle heat exchange section 1 is filtered through the filter screen 21 and then flows to the tubular heat exchange section 3; a plurality of second heat exchange tubes 22 are connected to the straight-through heat exchange shell 20 along the flow direction of the straight-through heat exchange shell 20, and one end of the second heat exchange tube 22 extends to the end of the straight-through heat exchange shell 20 to communicate with the outside.

[0071] A filter screen 21 is provided in the straight heat exchange section 2, the purpose of which is to filter out some impurities after the second heat exchange medium flowing into the baffle heat exchange section 1 passes through the filter screen 21, so that the second heat exchange medium is further purified, and the second heat exchange medium flowing through the baffle heat exchange section 1 is fully filtered and then output to the tubular heat exchanger for heat exchange, thereby enhancing the heat exchange effect;

[0072] The two ends of the multiple second heat exchange tubes 22 arranged in the straight heat exchange section 2 are respectively connected to the end of the straight heat exchange shell 20 along the axial direction of the straight heat exchange shell 20, and can be connected to the outside world. The purpose is that when the baffle heat exchange section 1 is docked with the straight heat exchange section 2, the end of the second heat exchange tube 22 facing the baffle heat exchange section 1 can be docked with the first heat exchange tube 19, so that the first heat exchange medium flows to the second heat exchange tube 22 through the first heat exchange tube 19; and the other end of the second heat exchange tube 22 is extended to the end of the straight heat exchange shell 20 and is connected to the outside world, which can further realize that when the straight heat exchange section 2 is docked with the tubular heat exchange section 3, the second heat exchange tube One end of 22 facing the tubular heat exchange section 3 can be connected to the third heat exchange tube 25 in the tubular heat exchange section 3, so that the first heat exchange medium enters the third heat exchange tube 25 of the tubular heat exchange section 3 from the first heat exchange tube 19 of the baffle heat exchange section 1 through the second heat exchange tube 22 of the straight heat exchange section 2, thereby forming a heat exchange path for the first heat exchange medium; and because the first heat exchange tube 19, the second heat exchange tube 22 and the third heat exchange tube 25 belong to different heat exchange sections, even if scaling occurs in any of the tubes, they can be disassembled separately for easy cleaning and maintenance, thereby reducing labor intensity, improving heat exchange efficiency, and extending the service life of the heat exchanger.

[0073] As a preferred embodiment, the end surface of the baffle heat exchange section 1 facing the straight heat exchange section 2 has a groove, and the end surface of the straight heat exchange section 2 facing the baffle heat exchange section 1 has a protrusion; or, the end surface of the baffle heat exchange section 1 facing the straight heat exchange section 2 has a protrusion, and the end surface of the straight heat exchange section 2 facing the baffle heat exchange section 1 has a groove; the protrusion and the groove are matched to connect so that the baffle heat exchange section 1 and the straight heat exchange section 2 are butt-connected, so that the first heat exchange tube 19 and the second heat exchange tube 22 Butt connection; similarly, the end face of the straight-through heat exchange section 2 facing the tubular heat exchange section 3 has a groove, and the end face of the tubular heat exchange section 3 facing the straight-through heat exchange section 2 has a protrusion; or, the end face of the straight-through heat exchange section 2 facing the tubular heat exchange section 3 has a protrusion, and the end face of the tubular heat exchange section 3 facing the straight-through heat exchange section 2 has a groove; the straight-through heat exchange section 2 and the tubular heat exchange section 3 are butt-connected by matching the protrusion and the groove, so that the second heat exchange tube 22 is connected to the third heat exchange tube 25.

[0074] It should be noted that the first heat exchange tube 19 and the second heat exchange tube 22 are arranged correspondingly, and the third heat exchange tube 25 and the second heat exchange tube 22 are arranged correspondingly, so that one end of the first heat exchange tube 19 is connected to one end of the second heat exchange tube 22, and one end of the third heat exchange tube 25 is connected to the second heat exchange tube 22, so that the first heat exchange tube 19 to the third heat exchange tube 25 are connected to form a heat exchange path for the first heat exchange medium.

[0075] In order to further achieve the docking connection between the baffle heat exchange section 1 and the straight heat exchange section 2, and to make the docking between the first heat exchange tube 19 and the second heat exchange tube 22 more accurate, a groove can be provided on the end face of the baffle heat exchange section 1 facing the straight heat exchange section 2, and a protrusion can be provided on the corresponding end face of the straight heat exchange section 2, or a protrusion can be provided on the end face of the baffle heat exchange section 1 facing the straight heat exchange section 2, and a groove can be provided on the end face of the corresponding straight heat exchange section 2. The baffle heat exchange section 1 and the straight heat exchange section 2 are connected by the cooperation of the protrusion and the groove, and the connection strength and assembly accuracy between the baffle heat exchange section 1 and the straight heat exchange section 2 are enhanced, so that the first heat exchange tube 19 in the baffle heat exchange section 1 can be accurately docked with the second heat exchange section on the straight heat exchange section 2.

[0076] Similarly, in order to achieve the docking connection between the straight heat exchange section 2 and the tubular heat exchange section 3, and to make the docking between the second heat exchange tube 22 and the third heat exchange tube 25 more accurate, the end surface of the straight heat exchange section 2 facing the tubular heat exchange section 3 may have a groove, and the end surface of the tubular heat exchange section 3 facing the straight heat exchange section 2 may have a protrusion; or, the end surface of the straight heat exchange section 2 facing the tubular heat exchange section 3 may have a protrusion, and the end surface of the tubular heat exchange section 3 facing the straight heat exchange section 2 may have a groove. The coordination between the protrusion and the groove allows the straight heat exchange section 2 and the tubular heat exchange section 3 to be connected, thereby enhancing the connection strength and assembly accuracy between the straight heat exchange section 2 and the tubular heat exchange section 3, so that the second heat exchange tube 22 in the straight heat exchange section 2 can be accurately docked with the third heat exchange section on the tubular heat exchange section 3;

[0077] Specifically, the groove can be designed to be a cross-shaped structure, or the groove can be distributed in the form of multiple intervals along the radial direction of the straight-through heat exchange section 2 or the baffle heat exchange section 1 to enhance the connection strength and operating stability between the straight-through heat exchange section 2 and the baffle heat exchange section 1, and prevent the baffle heat exchange section 1 from having an installation deviation between the straight-through heat exchange section 2, which would cause a deviation between the first heat exchange tube 19 and the second heat exchange tube 22.

[0078] As a preferred embodiment, the tubular heat exchange section 3 includes a tubular heat exchange shell 23, a partition 24 and a plurality of third heat exchange tubes 25; the partition 24 is connected to the tubular heat exchange shell 23 to separate the tubular heat exchange shell 23 into a first cavity 29 connected to the first outlet 5 and a second cavity 30 connected to the second outlet 7 along the flow direction; one end of the plurality of third heat exchange tubes 25 can be installed on the end of the tubular heat exchange shell 23, and the other end can be installed on the partition 24 to be connected to the first cavity 29.

[0079] A partition 24 is connected to the side of the tubular heat exchange section 3 away from the straight heat exchange section 2. The purpose of the partition 24 is to separate the first cavity 29 and the second cavity 30 in the tubular heat exchange section 3, so that the first cavity 29 is connected to the first outlet 5, and the second cavity 30 is connected to the second outlet 7. There are two sections of a plurality of third heat exchange tubes 25 on the partition 24. The second heat exchange medium can be connected to the second cavity 30 through the second heat exchange component 15 in the straight heat exchange section 2, and flow out through the second outlet 7 of the second cavity 30, so that the second heat exchange medium can flow in the space of the second cavity 30;

[0080] The first heat exchange medium flows through the first heat exchange tube 19 and the second heat exchange tube 22 to the third heat exchange tube 25. One end of the third heat exchange tube 25 can be installed on the end of the shell of the tubular heat exchange section 3. When the straight heat exchange section 2 and the tubular heat exchange section 3 are connected, the end of the third heat exchange tube 25 connected to the heat exchange section shell can be connected to the second heat exchange tube 22 of the straight heat exchange section 2 connected to the end of the shell of the straight heat exchange section 2, so that the first heat exchange medium can flow into the third heat exchange tube 25 through the second heat exchange tube 22 to realize the heat exchange path of the first heat exchange medium, and the other end of the third heat exchange tube 25 can be installed on the partition 24 and communicate with the first cavity 29, so that the second heat exchange medium flowing through the third heat exchange tube 25 can flow into the first cavity 29 and be discharged through the first outlet 5 connected to the first cavity 29, so that the first heat exchange medium and the second heat exchange medium flow in different heat exchange paths in the tubular heat exchange section 3 and realize convection, thereby realizing heat exchange.

[0081] Furthermore, the bottoms of the baffle heat exchange section 1, the straight heat exchange section 2 and the tubular heat exchange section 3 are fixedly connected to the skid frame 26, and the skid frame 26 is provided with lifting ears for cooperating with lifting and brackets for supporting the baffle heat exchange section 1, the straight heat exchange section 2 and the tubular heat exchange section 3.

[0082] The bracket is provided with a plurality of clamps for fixing the baffle heat exchange section 1, the straight heat exchange section 2, the tubular heat exchange section 3 and other pipelines. The pry frame 26 can be provided to isolate the heat exchanger from the ground, and the heat exchanger is easy to assemble on site, reducing the workload on site and the engineering cost.

[0083] The skid frame 26 includes a split structure formed by connecting multiple skid-mounted frames to support the heat exchanger, or the skid frame 26 is an integrated structure. The split structure is convenient for disassembly and assembly, and can be adaptively adjusted according to the total length of the actual heat exchanger, which is convenient for transportation; the integrated structure can enhance the overall connection strength of the skid frame 26, and the type of skid frame 26 is selected according to specific needs.

[0084] It should be noted that the baffle heat exchange section 1, the straight heat exchange section 2 and the tubular heat exchange section 3 can be connected horizontally or vertically, depending on actual needs.

[0085] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0086] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0087] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An anti-scaling high-efficiency heat exchanger, characterized in that: A multi-section heat exchanger comprising a baffle heat exchange section, a straight heat exchange section and a tubular heat exchange section which are detachably connected; The baffle heat exchange section, the straight heat exchange section and the tubular heat exchange section are connected to each other and have a first heat exchange channel for the circulation of a first heat exchange medium; the baffle heat exchange section has a first inlet for the first heat exchange medium to enter, and the tubular heat exchange section has a first outlet for the first heat exchange medium to be discharged; A second heat exchange channel for the circulation of a second heat exchange medium is formed between the baffle heat exchange section, the straight heat exchange section and the tubular heat exchange section. The baffle heat exchange section has a second inlet for the second heat exchange medium to enter, and the tubular heat exchange section has a second outlet for the second heat exchange medium to discharge.

2. The anti-scaling high-efficiency heat exchanger according to claim 1, characterized in that: The first inlet is connected to an inlet pipeline, and the first outlet is connected to an outlet pipeline; The inlet pipe is a corrugated pipe or a twisted pipe, and / or the outlet pipe is a corrugated pipe or a twisted pipe.

3. The anti-scaling high-efficiency heat exchanger according to claim 1, characterized in that: The inlet of the baffle heat exchange section is connected to the straight heat exchange section through a first heat exchange component, and the outlet of the straight heat exchange section is connected to the tubular heat exchange section through a second heat exchange component; the second heat exchange medium enters the baffle heat exchange section through the first inlet, enters the straight heat exchange section through the first heat exchange component, enters the tubular heat exchange section through the second heat exchange component, and is discharged through the first outlet to form a heat exchange path for the second heat exchange medium.

4. The anti-scaling high-efficiency heat exchanger according to claim 3, characterized in that: The first heat exchange assembly includes a first connecting pipe, a first elbow and a second connecting pipe; the first connecting pipe is connected to the first connecting port of the baffle heat exchange section, the second connecting pipe is connected to the inlet of the straight heat exchange section, and a first elbow is connected between the first connecting pipe and the second connecting pipe; The second heat exchange assembly includes a third connecting pipe, a second elbow and a fourth connecting pipe; the third connecting pipe is connected to the discharge port of the straight-through heat exchange section, the fourth connecting pipe is connected to the second connecting port of the tubular heat exchange section, and a second elbow is connected between the third connecting pipe and the fourth connecting pipe.

5. The anti-scaling high-efficiency heat exchanger according to claim 1, characterized in that: The baffle heat exchange section includes a baffle heat exchange shell, an end plate, a baffle and a plurality of first heat exchange tubes; the end plate is connected to the inside of the baffle heat exchange shell to divide the baffle heat exchange shell into a first chamber connected to a first inlet and a second chamber connected to a second inlet along a flow direction; one end of the plurality of first heat exchange tubes can be connected to the first chamber by being installed on the end plate, and the first heat exchange medium can enter the first heat exchange tube through the first chamber, and the other end of the plurality of first heat exchange tubes is installed on the end of the baffle heat exchange shell; the baffle is connected to the first heat exchange tube at intervals along the flow direction of the baffle heat exchange shell to form a guide for the second heat exchange medium.

6. The anti-scaling high-efficiency heat exchanger according to claim 5, characterized in that: The baffle is connected to the baffle heat exchange section and extends in a spiral shape along the flow direction of the baffle heat exchange section; and / or, a plurality of baffles are arranged in the baffle heat exchange section and are spaced apart and distributed along the flow direction perpendicular to the baffle heat exchange section; The baffle is connected to at least a portion of the first heat exchange tube along the radial direction of the baffle heat exchange section.

7. The anti-scaling high-efficiency heat exchanger according to claim 5, characterized in that: The straight-through heat exchange section includes a straight-through heat exchange shell, a filter screen and a plurality of second heat exchange tubes; the straight-through heat exchange shell is connected to the baffle heat exchange section through a connector; the filter screen is connected to the straight-through heat exchange shell so that the second heat exchange medium flowing from the baffle heat exchange section is filtered by the filter screen and then flows to the tubular heat exchange section; a plurality of second heat exchange tubes are connected to the straight-through heat exchange shell along the flow direction of the straight-through heat exchange shell, and one end of the second heat exchange tube extends to the end of the straight-through heat exchange shell to communicate with the outside.

8. The anti-scaling high-efficiency heat exchanger according to claim 7, characterized in that: The end surface of the baffle heat exchange section facing the straight heat exchange section has a groove, and the end surface of the straight heat exchange section facing the baffle heat exchange section has a protrusion; or, the end surface of the baffle heat exchange section facing the straight heat exchange section has a protrusion, and the end surface of the straight heat exchange section facing the baffle heat exchange section has a groove; The baffle heat exchange section and the straight heat exchange section are butt-connected by matching the protrusion with the groove, so that the first heat exchange tube and the second heat exchange tube are butt-connected.

9. The anti-scaling high-efficiency heat exchanger according to claim 1, characterized in that: The tubular heat exchange section includes a tubular heat exchange shell, a partition and a plurality of third heat exchange tubes; the partition is connected to the tubular heat exchange shell to divide the tubular heat exchange shell into a first cavity connected to a first outlet and a second cavity connected to a second outlet along a flow direction; one end of the plurality of third heat exchange tubes can be installed on the end of the tubular heat exchange shell, and the other end can be installed on the partition to be connected to the first cavity.

10. The anti-scaling high-efficiency heat exchanger according to claim 9, characterized in that: The end surface of the straight heat exchange section facing the tubular heat exchange section has a groove, and the end surface of the tubular heat exchange section facing the straight heat exchange section has a protrusion; or, the end surface of the straight heat exchange section facing the tubular heat exchange section has a protrusion, and the end surface of the tubular heat exchange section facing the straight heat exchange section has a groove; The straight heat exchange section and the tubular heat exchange section are butt-connected by matching the protrusions with the grooves, so that the second heat exchange tube is connected to the third heat exchange tube.

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