A corrosion-resistant shell-and-tube heat exchanger

Abstract

The present invention relates to the technical field of heat exchangers, and proposes a corrosion-resistant shell-and-tube heat exchanger, including a shell, a plurality of heat exchange tubes and a baffle, wherein the shell has a working space, the plurality of heat exchange tubes are arranged in the working space, and the baffles are arranged in a staggered interval in the working space to form a water flow channel, and further comprising: a circular tube, wherein there are a plurality of circular tubes, and the plurality of circular tubes are all arranged through the baffle, and the circular tubes have spiral flow channels, and the two ends of the spiral flow channels are respectively connected to the water flow channels on both sides of the baffle; and a bending plate, wherein there are a plurality of bending plates, and the plurality of bending plates are arranged at intervals on the baffle, and after the water flow enters the water flow channel, it is blocked by the bending plate to form turbulence. Through the above technical scheme, the problems of reduced heat exchange efficiency and unsatisfactory corrosion resistance treatment of the shell-and-tube heat exchanger existing in the related art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, and in particular to a corrosion-resistant shell-and-tube heat exchanger. Background Art

[0002] Shell and tube heat exchangers, also known as shell and tube heat exchangers, are one of the most commonly used heat exchange equipment in industrial production and are widely used in chemical, petroleum, pharmaceutical, food processing, electric power, refrigeration and other industries. Its main function is to achieve heat transfer between two fluids of different temperatures to achieve the purpose of heating or cooling without allowing the two fluids to mix directly.

[0003] After long-term use, shell-and-tube heat exchangers often suffer from structural corrosion. Existing corrosion-resistant shell-and-tube heat exchangers usually adopt the method of applying corrosion-resistant coating, but it will affect the heat exchange efficiency, or achieve corrosion resistance by using spiral baffles or inclined baffles to change the direction of water flow and increase turbulence, but the effect is not ideal. Summary of the invention

[0004] The present invention provides a corrosion-resistant shell-and-tube heat exchanger, which solves the problems of reduced heat exchange efficiency and unsatisfactory corrosion resistance of the shell-and-tube heat exchanger in the related art.

[0005] The technical solution of the present invention is as follows:

[0006] A corrosion-resistant shell-and-tube heat exchanger comprises a shell, a plurality of heat exchange tubes and baffles, wherein the shell has a working space, a plurality of heat exchange tubes are arranged in the working space, and the baffles are arranged in a staggered interval in the working space to form a water flow channel, and further comprises:

[0007] A circular tube, wherein the circular tube has a plurality of circular tubes, and the plurality of circular tubes are all arranged through the baffle plate, wherein the circular tube has a spiral flow channel, and the two ends of the spiral flow channel are respectively connected to the water flow channels on both sides of the baffle plate;

[0008] There are a plurality of bending plates, and the plurality of bending plates are arranged at intervals on the baffle plate. After the water flow enters the water flow channel, it is blocked by the bending plates to form turbulence.

[0009] Preferably, the baffle has a plurality of tube holes, each of which is provided with a heat exchange tube, and the circular tube is staggered with the tube holes.

[0010] Preferably, the baffle has a mounting hole, and further comprises:

[0011] A movable plate, wherein the movable plate has a through slot, the heat exchange tube passes through the through slot, and the movable plate is used to move toward the baffle under water pressure;

[0012] A sliding rod, one end of which is disposed on the movable plate, and the other end of which is slidably disposed in the mounting hole;

[0013] an elastic member, one end of which is arranged on the movable plate, and the other end of which is arranged on the baffle;

[0014] A control member is arranged on a side of the baffle away from the movable plate, and the control member has a cavity, and the other end of the sliding rod is slidably arranged in the cavity; after the elastic member is compressed, the control member guides the elastic member to reset.

[0015] Preferably, the housing has a water inlet and a water outlet, and further comprises:

[0016] A branch pipe, one end of which is connected and arranged near the water inlet, and the other end of which is connected and arranged near the water outlet;

[0017] A valve is arranged on the branch pipe. After the valve is opened, part of the water flow in the water flow channel enters into the branch pipe.

[0018] Preferably, the control element comprises:

[0019] A sleeve, wherein the sleeve is arranged on the baffle, the cavity is located in the sleeve, and one end of the sliding rod passes through the mounting hole and is slidably arranged in the cavity;

[0020] A guide plate, the guide plate is arranged in the cavity, and the guide plate has a guide groove;

[0021] A pin shaft, the pin shaft is slidably and rotatably disposed in the guide groove;

[0022] A connecting rod is located in the cavity, one end of the connecting rod is hinged to the side wall of the sliding rod, and the other end is hinged to the pin shaft.

[0023] Preferably, the guide groove comprises:

[0024] A first guide groove, wherein the first guide groove has a first bending section, the pin shaft is slidably disposed in the first guide groove, and after the sliding rod enters the cavity, the pin shaft enters the first bending section along the first guide groove;

[0025] A second guide groove, wherein the second guide groove has a second bending section, an end of the first bending section away from the first guide groove is connected to the middle of the second bending section, and an end of the second bending section away from the second guide groove has a stop end, the stop end and the second bending section are arranged in a straight line, and the stop end and the first bending section are arranged obliquely;

[0026] A revolving groove is arranged at one end of the first guide groove away from the first bending section, and the revolving groove is respectively connected to the first guide groove and the second guide groove.

[0027] Preferably, the baffle further comprises:

[0028] There are several blocks, one of which is arranged between adjacent through grooves, and a notch is arranged between two adjacent blocks, and the blocks are used to disturb the water flow in the water flow channel.

[0029] Preferably, there is a gap between the through groove and the heat exchange tube.

[0030] Preferably, it also includes:

[0031] The baffle is arranged at the edge of the movable plate, and the baffle is arranged obliquely with respect to the outer side of the movable plate.

[0032] Preferably, the bending plate comprises:

[0033] a first inclined plate, the first inclined plate being disposed on the baffle plate, and the first inclined plate being arranged obliquely with respect to the water flow direction in the water flow channel;

[0034] The second inclined plate is arranged on the baffle plate, and the second inclined plate is arranged at one end of the first inclined plate, and the second inclined plate is arranged obliquely with the first inclined plate.

[0035] The working principle and beneficial effects of the present invention are:

[0036] The round tubes in the present invention are inserted into the baffles, and each round tube has a spiral structure inside to form a spiral flow channel. When the fluid passes through the spiral flow channel, due to the guidance of the spiral structure, a spiral flow will be generated, which not only increases the turbulence of the fluid, but also effectively prolongs the contact time between the fluid and the heat exchange tube wall, greatly improving the heat exchange efficiency. In combination with the bending plate, the turbulence is further increased, the precipitation in the shell is reduced, and the corrosion resistance of the shell-and-tube heat exchanger is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0038] Figure 1 Schematic diagram of the internal structure of the heat exchanger of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the heat exchanger from another perspective;

[0040] Figure 3 This is a schematic diagram of the baffle structure of the present invention;

[0041] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0042] Figure 5 It is a schematic diagram of the structure of the movable plate of the present invention;

[0043] Figure 6 for Figure 5 A partial enlarged view of point C in the middle;

[0044] Figure 7 for Figure 2 A partial enlarged view of the middle part;

[0045] Figure 8 This is a schematic diagram of the guide plate structure of the present invention;

[0046] Fig. 9 It is a schematic diagram of the structure of the heat exchanger of the present invention.

[0047] In the figure: 1, shell; 101, working space; 102, water flow channel; 103, water inlet; 104, water outlet; 2, heat exchange tube; 3, movable plate; 301, through groove; 4, baffle; 401, tube hole; 402, round tube; 4021, spiral flow channel; 403, bending plate; 4031, first inclined plate; 4032, second inclined plate; 404, mounting hole; 5, stopper; 501, notch; 6, sliding Moving rod; 7, elastic member; 8, baffle; 9, control member; 91, sleeve; 901, cavity; 10, guide plate; 1010, guide groove; 1011, first guide groove; 1012, first bending section; 1013, second bending section; 1014, stop end; 1015, second guide groove; 1016, rotary groove; 11, connecting rod; 12, pin shaft; 13, branch pipeline; 14, valve; 15, gap. DETAILED DESCRIPTION

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0049] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0050] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0052] Reference Figure 1 to Figure 9 , is an embodiment of the present invention, and proposes a corrosion-resistant shell-and-tube heat exchanger, including a shell 1, a plurality of heat exchange tubes 2 and a baffle 4, the shell 1 has a working space 101, a plurality of heat exchange tubes 2 are arranged in the working space 101, and the baffles 4 are arranged in the working space 101 at staggered intervals to form a water flow channel 102, and also includes: a circular tube 402, having a plurality of, and the plurality of circular tubes 402 are all arranged on the baffle 4, the circular tube 402 has a spiral flow channel 4021, and the two ends of the spiral flow channel 4021 are respectively connected to the water flow channel 102 on both sides of the baffle 4; a plurality of bending plates 403, having a plurality of, and the plurality of bending plates 403 are arranged on the baffle 4 at intervals, and after the water flow enters the water flow channel 102, it is blocked by the bending plate to form turbulence.

[0053] In the above scheme, the purpose is to increase the turbulence effect by optimizing the structural design, so as to improve the heat exchange efficiency and enhance the corrosion resistance of the equipment, and overcome the limitations of the existing technology of reduced heat exchange efficiency and unsatisfactory corrosion resistance. The shell 1 is made of high-strength corrosion-resistant materials such as stainless steel or duplex stainless steel to ensure the durability of the basic structure. The interior of the shell 1 constitutes a spacious working space 101, which provides sufficient channels for the flow of fluid. The heat exchange tube 2 is made of materials with excellent corrosion resistance, such as titanium alloy or Hastelloy, and is fixed on the tube sheet designed for corrosion resistance by precise expansion or welding technology to ensure good sealing between the heat exchange tube 2 and the tube sheet. The baffle 4 is also corrosion-resistant and is arranged at intervals in the shell 1 to guide the flow of the fluid and form an orderly curved flow channel.

[0054] The circular tube 402 is inserted through the baffle 4 by welding. Each circular tube 402 has a spiral structure inside, forming a spiral flow channel 4021. When the fluid passes through the spiral flow channel 4021, due to the guidance of the spiral structure, a spiral flow will be generated, which not only increases the turbulence degree of the fluid, but also effectively prolongs the contact time between the fluid and the heat exchange tube wall, greatly improving the heat exchange efficiency. At the same time, it also reduces the direct impact of the fluid on the tube wall and reduces the corrosion risk of the tube body. The bent plates 403 are arranged at intervals between the baffles 4. The bent plates 403 are designed into specific shapes, such as: "7"-shaped or "several"-shaped, etc., which can guide the fluid to generate an additional guiding effect when flowing through, further enhancing the turbulence effect, so as to improve the heat exchange efficiency without increasing the external power consumption. The design of the bent plates 403 also takes into account reducing dead corners, avoiding the formation of fluid stagnation areas, and reducing the possibility of corrosion occurrence. Through the above structural design, the corrosion-resistant shell-and-tube heat exchanger of this embodiment shows the following advantages in practical applications: Enhanced heat exchange efficiency: The combined design of the spiral flow channel 4021 and the bent plates 403 significantly improves the turbulence degree of the fluid, increases the heat exchange area and heat exchange time, making the heat exchange efficiency significantly improved compared with the traditional design. Corrosion-resistant performance: Corrosion-resistant materials are selected and the internal fluid flow pattern is optimized, reducing the direct impact of the fluid on the heat exchange tube 2 and the retention of the fluid in the shell 1, effectively suppressing the corrosion problem.

[0055] Furthermore, the baffle 4 has a number of tube holes 401, and each tube hole 401 is provided with a heat exchange tube 2. The circular tube 402 and the tube holes 401 are arranged in a staggered manner.

[0056] In the above scheme, the layout of the tube holes: on each baffle 4, a number of precisely arranged tube holes are designed, which match the diameter of the heat exchange tube 2 to ensure that the heat exchange tube 2 can pass through tightly and firmly, while maintaining good sealing, preventing fluid leakage, and supporting the heat exchange tube 2. The staggered arrangement between the circular tube 402 and the tube holes on the baffle 4. Specifically, each circular tube 402 does not affect the tube holes on the baffle 4, and can change the flow path of the fluid when passing through the baffle 4 without reducing the heat exchange area, prompting the fluid to form more complex vortices around the tube holes, further enhancing the turbulent effect. Through this staggered arrangement, when the fluid passes through the heat exchange tube 2, in addition to being guided by the spiral flow channel 4021 to produce spiral flow, it also needs to bypass the staggered circular tube 402. This double-layer fluid disturbance not only significantly increases the contact opportunity between the fluid and the wall of the heat exchange tube 2, but also improves the heat exchange efficiency, while promoting uniform heat exchange inside the fluid and reducing the occurrence of hot spots and cold spots. Another benefit of the staggered arrangement is that it reduces the direct impact of the fluid at specific points, especially for corrosion-prone areas such as the edges of pipe holes. By optimizing fluid dynamics, the accumulation of corrosive substances and the corrosion rate are reduced, thereby extending the service life of the equipment.

[0057] Furthermore, the baffle plate 4 has a mounting hole 404, and also includes: a movable plate 3, having a through groove 301, through which the heat exchange tube 2 passes, and the movable plate 3 is used to move toward the baffle plate 4 under water pressure; a sliding rod 6, one end of which is arranged on the movable plate 3, and the other end slides through the mounting hole 404; an elastic member 7, one end of which is arranged on the movable plate 3, and the other end of which is arranged on the baffle plate 4; a control member 9, which is arranged on the side of the baffle plate 4 away from the movable plate 3, and has a cavity 901, and the other end of the sliding rod 6 is slidably arranged in the cavity 901; after the elastic member 7 is pressed, the control member 9 guides the elastic member to reset.

[0058] In the above scheme, a movable plate 3 is introduced into the baffle 4. The movable plate 3 has a through groove 301 matching the diameter of the heat exchange tube 2, so that the heat exchange tube 2 can pass through. The movable plate 3 can change the relative position of the movable plate 3 and the baffle 4 according to the water flow in the water flow channel 102. The movable plate 3 is designed to respond to the pressure of the fluid (water or other working medium) inside the shell 1 and move toward the baffle 4. Using fluid pressure as power, no external driving source is required, which simplifies the control system and reduces energy consumption. One end of the sliding rod 6 is fixed on the movable plate 3, and the other end slides through the mounting hole 404 of the baffle 4, ensuring that the movable plate 3 can slide along the axial direction of the heat exchange tube 2 in the shell 1 to achieve dynamic position adjustment. The two ends of the elastic member 7 are respectively connected to the movable plate 3 and the baffle 4, playing the role of a reset spring. The control member 9 is arranged on the side of the baffle 4 away from the movable plate 3, and has a built-in cavity 901. The other end of the sliding rod 6 is slidably arranged in the cavity 901 of the control member 9. When water is needed to flush the movable plate 3, the elastic member 7 is compressed. When the water pressure decreases, the control member 9 controls its release, and the movable plate 3 is reset to achieve dynamic movement of the movable plate 3, increase the disturbance of the movable plate 3, and increase the turbulence effect.

[0059] Furthermore, the shell 1 has a water inlet 103 and a water outlet 104, and also includes: a branch pipe 13, one end of the branch pipe 13 is connected and arranged near the water inlet 103, and the other end is connected and arranged near the water outlet 104; a valve 14 is arranged in the branch pipe 13, after the valve 14 is opened, part of the water flow in the water flow channel 102 enters the branch pipe 13.

[0060] In the above scheme, the layout of the branch pipe 13 is as follows: a branch pipe 13 is added outside the shell 1, and the branch pipe 13 is connected to the main water flow channel 102, ensuring that the fluid can flow between the main channel and the branch. One end of the branch pipe 13 is located near the water inlet 103 of the shell 1, and the other end is arranged near the water outlet 104. Such a layout facilitates the control of the circulation path of the fluid inside the shell 1 and realizes the regulation of the fluid distribution. A controllable valve 14 is installed on the branch pipe 13, and the valve 14 can be opened or closed as needed. When the valve 14 is opened, part of the water flow in the main water flow channel 102 will be guided into the branch pipe 13 to form a bypass flow. At this time, the pressure in the water flow channel 102 decreases, and the compressed elastic member 7 drives the movable plate 3 to reset, so that the movable plate 3 moves in the direction away from the baffle 4. When the valve 14 is closed, the water flow pressure in the water flow channel 102 increases, which will cause the movable plate 3 to move slowly in the direction of the baffle 4 and squeeze the elastic member 7. Through the switch control of the valve 14, the flow entering the branch can be dynamically adjusted, thereby affecting the fluid flow pattern and heat exchange efficiency inside the entire heat exchanger.

[0061] It should be noted that the valve 14 can be a solenoid valve, which can be opened and closed at a high frequency during heat exchange, thereby realizing the reciprocating movement of the movable plate 3. In addition, if the water pressure variation of the water flow channel 102 is small, the movable plate 3 can only reciprocate in a small range, but the effect of disturbing flow and forming turbulence can also be achieved.

[0062] Furthermore, the control member 9 includes: a sleeve 91, which is arranged on the baffle plate 4, the cavity 901 is located in the sleeve 91, and one end of the sliding rod 6 passes through the mounting hole 404 and is slidably arranged in the cavity 901; a guide plate 10, having a guide groove 1010; a pin 12, which is slidably and rotatably arranged in the guide groove 1010; a connecting rod 11, which is located in the cavity 901, one end of which is hinged to the side wall of the sliding rod 6, and the other end is hinged to the pin 12.

[0063] In the above scheme, the sleeve 91 is installed on one side of the baffle 4, and a cavity 901 is constructed inside the sleeve 91. The sliding rod 6 passes through one end of the mounting hole 404 and slides in the cavity 901. A guide plate 10 is arranged at a specified position of the sleeve 91 or the baffle 4, and a guide groove 1010 is opened on the plate. The pin 12 can slide and rotate in the guide groove 1010. The connecting rod 11 is placed inside the cavity 901, one end of which is connected to the side wall of the sliding rod 6 by a hinge, and the other end is hinged on the pin 12. This configuration of the connecting rod 11 ensures that the rotation of the pin 12 can be transmitted to the sliding rod 6 through the hinge point, thereby pushing the movable plate 3 to move in the direction of the heat exchange tube 2. The displacement of the sliding rod 6 further drives the movable plate 3 to move along the direction of the heat exchange tube 2, thereby realizing the movement of the movable plate 3. When returning, under the action of the elastic member 7, the sliding rod 6 and the movable plate 3 will return to their original positions.

[0064] Furthermore, the guide groove 1010 includes: a first guide groove 1011, having a first bending section 1012, the pin shaft 12 is slidably arranged in the first guide groove 1011, after the sliding rod 6 enters the cavity 901, the pin shaft 12 enters the first bending section 1012 along the first guide groove 1011; a second guide groove 1015, having a second bending section 1013, the first bending section 1012 one end away from the first guide groove 1011 and the second bending section 1013 3, the second bending section 1013 has a stop end 1014 at one end away from the second guide groove 1015, the stop end 1014 and the second bending section 1013 are arranged in a straight line, and the stop end 1014 and the first bending section 1012 are arranged obliquely; a revolving groove 1016 is provided at one end of the first guide groove 1011 away from the first bending section 1012, and the revolving groove 1016 is respectively connected to the first guide groove 1011 and the second guide groove 1015.

[0065] In the above scheme, the first guide groove 1011 includes a first bending section 1012 with a specific shape, which is used to guide the pin shaft 12 to experience a turning point when sliding. When the sliding rod 6 enters the cavity 901, the pin shaft 12 will slide along the first guide groove 1011 and turn into the first bending section 1012, so as to achieve preliminary adjustment of the sliding rod 6 in the vertical direction. Second guide groove 1015: The second guide groove 1015 is also provided with a second bending section 1013. One end of the first bending section 1012 away from the second bending section 1013 is connected to the middle part of the second bending section 1013, so as to ensure that the pin shaft 12 has a natural transition between the two bending sections. The other end of the second bending section 1013 is provided with a stop end 1014, which is arranged in a straight line with the second bending section 1013 and is arranged obliquely with the first bending section 1012. When the movable plate 3 moves toward the baffle 4, the pin 12 enters the first bending section 1012 through the first guide groove 1011. When the movable plate 3 continues to move toward the baffle 4, the pin 12 enters the stop end 1014 under the guidance of the first bending section 1012. When the movable plate 3 moves toward the baffle 4 again, the pin 12 moves toward the second bending section 1013. When the pin 12 enters the second guide groove 1015, if the branch pipe 13 is opened at this time, the pressure of the water flow channel 102 is reduced, and under the action of the spring, the pin 12 enters the revolving groove 1016 along the second guide groove 1015. The revolving groove 1016 acts as a connecting bridge, which is not only connected to the first guide groove 1011, but also connected to the second guide groove 1015. It should be noted that when the water pressure changes, the movable plate does not move in one direction. It is found in multiple field tests that when the movable plate is working, even if the water pressure is almost unchanged, the movable plate will still produce a slight swing along the axis direction of the heat exchange tube 2. The specific reason is that when the water flows through the through groove 301 and the round tube 402 at the same time, due to the different cross-sectional areas of the through groove 301 and the round tube 402, the water flow speed through the through groove 301 and the round tube 402 is different, and the influence of the spiral flow channel causes the water flow to fluctuate, and the water flow directly impacts the movable plate 3. However, when the water pressure is large enough (the branch pipeline is closed at this time), the movable plate 3 can move to the side of the baffle 4, but there will still be a reciprocating linear swing. When the pin 12 enters the intersection of the first bending section 1012 and the second bending section 1013, the swing effect will cause the pin 12 to enter the first bending section 1012 and detach from the second bending section 1013.

[0066] Furthermore, the baffle 4 also includes: a plurality of blocks 5 , one block 5 is provided between adjacent through grooves 301 , and a notch 501 is provided between two adjacent block blocks 5 , and the block 5 is used to disturb the water flow in the water flow channel 102 .

[0067] In the above scheme, the baffle 4 not only has several conventional through grooves 301 for inserting the heat exchange tubes 2, but also has a series of blocks 5 carefully arranged between adjacent through grooves 301. These blocks 5 can change the fluid flow path, and by increasing the disturbance of the fluid, notches 501 are formed between two adjacent blocks 5. These notches 501 are used for water to pass through, ensuring that the fluid can continue to flow. The notches 501 optimize the flow pattern of the fluid, promote turbulence, and enhance the heat exchange efficiency. The existence of the block 5 not only serves as a physical obstacle, but also has the function of disturbing the fluid. When the fluid passes through the block 5, it is forced to change direction, generating a vortex to bypass both sides of the block 5. Such disturbance not only promotes internal mixing of the fluid, but also makes the fluid contact with the wall of the heat exchange tube 2 more frequently, thereby improving the heat exchange efficiency.

[0068] Furthermore, there is a gap 15 between the through groove 301 and the heat exchange tube 2 . When the movable plate 3 is close to the baffle plate 4 , the water in the water flow channel 102 can still flow, but there is still pressure on both sides of the movable plate 3 .

[0069] Furthermore, it also includes: a baffle 8, which is arranged at the edge of the movable plate 3, and the baffle 8 is arranged obliquely with the outer side of the movable plate 3. The baffle 8 is specifically arranged at the bottom of the movable plate 3. When water flows into the water flow channel 102 through the water inlet 103, most of the water can be blocked and guided by the baffle 8, so that most of the water flows into the water flow channel 102 from the side of the movable plate 3 away from the baffle 4, so that the movable plate 3 moves toward the side of the baffle 4 under the action of water pressure.

[0070] Furthermore, the elastic member 7 is a compression spring.

[0071] Furthermore, the bending plate 403 includes: a first inclined plate 4031, which is arranged on the baffle plate, and the first inclined plate 4031 is arranged obliquely with respect to the water flow direction in the water flow channel 102; a second inclined plate 4032, which is arranged on the baffle plate 4, and the second inclined plate 4032 is arranged at one end of the first inclined plate 4031, and the second inclined plate 4032 is arranged obliquely with respect to the first inclined plate 4031.

[0072] In the above scheme, when water flows in the water flow channel 102, the first inclined plate 4031 and the second inclined plate 4032 can cooperate to disturb the flow, so that the water flow passing through the first inclined plate 4031 and the second inclined plate 4032 forms turbulence. It should be noted that the first inclined plate 4031 and the second inclined plate 4032 are arranged at an obtuse angle, which can increase the turbulence effect without excessively affecting the water flow velocity.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A corrosion-resistant shell-and-tube heat exchanger, comprising a shell (1), a plurality of heat exchange tubes (2) and a baffle (4), wherein the shell (1) has a working space (101), the plurality of heat exchange tubes (2) are arranged in the working space (101), and the baffles (4) are arranged at staggered intervals in the working space (101) to form a water flow channel (102), characterized in that: Also includes: A circular tube (402), wherein there are a plurality of the circular tubes (402), and the plurality of the circular tubes (402) are all arranged through the baffle (4), wherein the circular tube (402) has a spiral flow channel (4021), and the two ends of the spiral flow channel (4021) are respectively connected to the water flow channels (102) on both sides of the baffle (4); A bending plate (403), wherein the bending plates (403) are provided in plurality, and the plurality of bending plates (403) are arranged at intervals on the baffle (4), and after the water flow enters the water flow channel (102), it is blocked by the bending plates (403) to form turbulence; The baffle plate (4) has a mounting hole (404), It also comprises: a movable plate (3), the movable plate (3) having a through groove (301), the heat exchange tube (2) passing through the through groove (301), and the movable plate (3) being used to move towards the baffle plate (4) under water pressure; A sliding rod (6), one end of which is arranged on the movable plate (3), and the other end of which is slidably arranged in the mounting hole (404); an elastic member (7), one end of the elastic member (7) being arranged on the movable plate (3) and the other end of the elastic member (7) being arranged on the baffle plate (4); a control member (9), the control member (9) being arranged on a side of the baffle plate (4) away from the movable plate (3), the control member (9) having a cavity (901), the other end of the sliding rod (6) being slidably arranged in the cavity (901); after the elastic member (7) is compressed, the control member (9) guides the elastic member to return to its original position; The housing (1) has a water inlet (103) and a water outlet (104); A branch pipe (13), one end of the branch pipe (13) is connected and arranged near the water inlet (103), and the other end of the branch pipe (13) is connected and arranged near the water outlet (104); A valve (14), wherein the valve (14) is arranged on the branch pipe (13); when the valve (14) is opened, part of the water flow in the water flow channel (102) enters the branch pipe (13), the water flow pressure in the water flow channel (102) decreases, and the elastic member (7) drives the movable plate (3) to move in a direction away from the baffle (4); when the valve (14) is closed, the water flow pressure in the water flow channel (102) increases, and the movable plate (3) squeezes the elastic member (7).

2. The corrosion-resistant shell-and-tube heat exchanger according to claim 1, characterized in that: The baffle (4) further comprises a plurality of tube holes (401), each of the tube holes (401) being provided with a heat exchange tube (2), and the circular tube (402) and the tube hole (401) being arranged in a staggered manner.

3. The corrosion-resistant shell-and-tube heat exchanger according to claim 1, characterized in that: The control member (9) comprises: A sleeve (91), the sleeve (91) being arranged on the baffle (4), the cavity (901) being located in the sleeve (91), and one end of the sliding rod (6) passing through the mounting hole (404) being slidably arranged in the cavity (901); A guide plate (10), the guide plate (10) being arranged in the cavity (901), the guide plate (10) having a guide groove (1010); A pin shaft (12), the pin shaft (12) being slidably and rotatably disposed in the guide groove (1010); A connecting rod (11), wherein the connecting rod (11) is located in the cavity (901), one end of the connecting rod is hinged to the side wall of the sliding rod (6), and the other end of the connecting rod is hinged to the pin shaft (12).

4. The corrosion-resistant shell-and-tube heat exchanger according to claim 3, characterized in that: The guide groove (1010) comprises: A first guide groove (1011), wherein the first guide groove (1011) has a first bending section (1012), wherein the pin shaft (12) is slidably disposed in the first guide groove (1011), and after the sliding rod (6) enters the cavity (901), the pin shaft (12) enters the first bending section (1012) along the first guide groove (1011); a second guide groove (1015), wherein the second guide groove (1015) has a second bending section (1013), an end of the first bending section (1012) away from the first guide groove (1011) is connected to the middle of the second bending section (1013), an end of the second bending section (1013) away from the second guide groove (1015) has a stop end (1014), the stop end (1014) and the second bending section (1013) are arranged in a straight line, and the stop end (1014) and the first bending section (1012) are arranged obliquely; A revolving groove (1016), wherein the revolving groove (1016) is arranged at an end of the first guide groove (1011) away from the first bending section (1012), and the revolving groove (1016) is respectively connected to the first guide groove (1011) and the second guide groove (1015).

5. The corrosion-resistant shell-and-tube heat exchanger according to claim 1, characterized in that: The baffle (4) further comprises: A block (5), wherein the block (5) is in plurality, one block (5) is arranged between adjacent through grooves (301), a notch (501) is provided between two adjacent block blocks (5), and the block (5) is used to disturb the water flow in the water flow channel (102).

6. The corrosion-resistant shell-and-tube heat exchanger according to claim 1, characterized in that: There is a gap (15) between the through groove (301) and the heat exchange tube (2).

7. The corrosion-resistant shell-and-tube heat exchanger according to claim 1, characterized in that: Also includes: A baffle (8), wherein the baffle (8) is arranged at the edge of the movable plate (3), and the baffle (8) is arranged obliquely with respect to the outer side of the movable plate (3).

8. The corrosion-resistant shell-and-tube heat exchanger according to claim 1, characterized in that: The bending plate (403) comprises: A first inclined plate (4031), the first inclined plate (4031) being arranged on the baffle plate (4), the first inclined plate (4031) being arranged obliquely with respect to the direction of water flow in the water flow channel (102); A second inclined plate (4032), wherein the second inclined plate (4032) is arranged on the deflector (4), and the second inclined plate (4032) is arranged at one end of the first inclined plate (4031), and the second inclined plate (4032) and the first inclined plate (4031) are arranged obliquely.

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