Scale-inhibiting and anti-blocking plate heat exchanger

Abstract

The invention relates to the field of plate heat exchangers and discloses an anti-scale and anti-blocking plate heat exchanger which comprises a fixed plate, guide rods are fixedly connected to the upper side and the lower side of one end of the fixed plate, and the outer diameters of the middles of the guide rods are movably connected to the upper side and the lower side of the interior of a movable plate correspondingly. A plurality of tightly connected plate sheets are arranged between the fixed plate and the movable plate, a descaling mechanism is arranged in the middle of the outer side end of the fixed plate, four fluid inlets and outlets are further formed in the outer side end of the fixed plate, a plurality of flow limiting mechanisms are arranged in the middles of the plate sheets, and each flow limiting mechanism comprises a flow dividing plate and a flow blocking plate. And a pointed end is arranged at the top of the splitter plate. By arranging the descaling mechanism, before fluid enters the equipment, part of calcium ions and magnesium ions in the fluid are filtered out through the semipermeable membrane, part of calcium ions and magnesium ions in the fluid are removed through the ion exchange resin filler, and therefore dirt generated in the heat exchange process of the fluid is greatly reduced, and the scale inhibition purpose is achieved.

Description

Technical Field

[0001] The present invention relates to the field of plate heat exchangers, and particularly to a plate heat exchanger for scale prevention and blockage prevention. Background Art

[0002] A plate heat exchanger is a common heat exchange device used to transfer heat from one fluid to another, usually for heating, cooling or evaporation processes. Since a large amount of cold water and hot water need to be circulated in the plate heat exchanger, a large amount of scale usually accumulates inside. Scale refers to salts such as calcium carbonate and magnesium carbonate dissolved in water. Under the conditions of heating or evaporation, as the water evaporates, the solubility decreases, resulting in the precipitation and deposition of these salts on the surface to form white or yellow solid residues. Scale not only affects the heat transfer efficiency, but also increases energy consumption and may damage the equipment. Therefore, measures are usually taken to prevent and remove scale, such as water treatment, regular cleaning and maintenance of the equipment, etc. However, these methods are first of all more troublesome to operate and the removal effect is average. Most of the current internal plate structures are inclined line type flow guides, and this structure cannot control the flow velocity change of the fluid inside, easily forming internal vortices, thus causing scale accumulation. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a plate heat exchanger for scale prevention and blockage prevention, which solves the problems that the existing treatment methods are more troublesome to operate, the removal effect is average, and the plate structure cannot control the flow velocity change of the fluid inside, easily forming internal vortices, thus causing scale accumulation.

[0004] To achieve the above purposes, the present invention is realized through the following technical solutions: A plate heat exchanger for scale prevention and blockage prevention includes a fixed plate. Both the upper and lower sides of one end of the fixed plate are fixedly connected with guide rods. The outer diameters of the middle parts of the guide rods are respectively movably connected to the upper and lower sides inside a movable plate. There are several closely connected plate sheets between the fixed plate and the movable plate. A descaling mechanism is arranged in the middle of the outer side end of the fixed plate. Four fluid inlets and outlets are also arranged on the outer side end of the fixed plate. Several flow limiting mechanisms are arranged in the middle of the plate sheets. The flow limiting mechanism includes a flow dividing plate and a flow blocking plate. The flow dividing plate is fixedly arranged on one side of the flow blocking plate. The top of the flow dividing plate is provided with a pointed end, and the bottom of the flow dividing plate is provided with a round end. The bottom of the flow blocking plate is provided with a hook body. A main flow channel is arranged on the side of the flow dividing plate away from the flow blocking plate, and a flow dividing channel is arranged on the side of the flow dividing plate close to the flow blocking plate.

[0005] Preferably, the ends of the guide rods are respectively fixedly connected to the upper and lower sides of a support column. Both sides of the inner ends of the guide rods and the movable plate are installed and fixed through several tension bolts.

[0006] Preferably, four fluid inlets and outlets are further provided at the outer side end of the fixing plate. The fluid inlets and outlets include a hot fluid inlet provided on one side of the upper part of the fixing plate, a hot fluid outlet provided on one side of the lower part of the fixing plate, a cold fluid outlet provided on the other side of the upper part of the fixing plate, and a cold fluid inlet provided on the other side of the lower part of the fixing plate.

[0007] Preferably, flow holes are provided at the four corners inside the plate piece, and sealing rubber rings are fixedly connected to the inner circles of the flow holes.

[0008] Preferably, the descaling mechanism includes two shells, which are respectively fixedly installed on the upper and lower sides of the outer side end of the fixing plate. Partition plates are provided inside the shells, and the partition plates divide the shells into an inner filter chamber and an outer ion exchange chamber. Communication holes are provided at positions corresponding to the fluid inlets and outlets at the inner side ends of the partition plates, and water inlets are provided at the mutually remote sides of the outer side ends of the shells.

[0009] Preferably, punching plates are fixedly installed on the mutually remote sides inside the filter chamber. A plurality of venturi tubes are fixedly connected to the inner side ends of the punching plates. At least one semi-permeable membrane is fixedly installed on the mutually close sides inside the filter chamber. Ion exchange resin fillers are movably arranged inside the ion exchange chambers.

[0010] Preferably, a DC motor is fixedly installed on the top of the upper shell. A rotating rod is fixedly installed at the driving end of the DC motor, and the end of the rotating rod extends to the bottom wall of the lower shell. Spiral guide vanes are fixedly installed on the outer diameters of the rotating rod between the punching plate and the semi-permeable membrane.

[0011] Preferably, a rotating body is fixedly connected to the outer diameter of the middle part of the rotating rod. An inclined groove is provided on the outer diameter of the rotating body. A metal outer ring is movably arranged outside the rotating body. A plurality of balls are movably arranged between the inclined groove and the metal outer ring. Swing rods are fixedly connected to both ends of the metal outer ring. The ends of the swing rods are movably connected to connecting rods. The ends of the connecting rods are movably connected to push-pull rods. The ends of the push-pull rods penetrate through the outer walls of the corresponding shells and are fixedly connected to one ends of the ion exchange resin fillers.

[0012] Working principle: First, hot fluid and cold fluid are respectively introduced into the interior of the housing through the upper and lower water inlets. After the fluid enters the interior of the housing, it will pass through the perforated plate and the venturi tube in the filter chamber. Since the venturi tube is conical in shape, the fluid will increase in flow rate and pressure after passing through the venturi tube. At this time, the DC motor is started, and the rotating rod is driven to rotate by the DC motor, driving the spiral guide vanes on the upper and lower sides to rotate. The rotating guide vanes are used to guide the fluid to further increase the fluid pressure, so that the fluid passes through the semi-permeable membrane. The semi-permeable membrane can prevent calcium, magnesium and other ions in the fluid from passing through, thereby softening the fluid and reducing the generation of later-stage dirt. The filtered fluid will enter the ion exchange chamber from the filter chamber. Since the rotating rod will also drive the rotating body to rotate when rotating, the rotating rotating body will drive the ball in the inclined groove to move, thereby driving the metal outer ring to swing reciprocally. The swinging metal outer ring drives the push-pull rods at both ends to move up and down through the transmission of the connecting rod, thereby driving the ion exchange resin filler in the ion exchange chamber to shake up and down continuously. The ion exchange resin filler is carried with sodium ions. When the fluid passes through, the calcium ions and magnesium ions inside will exchange with the sodium ions on the ion exchange resin filler, so that calcium and magnesium in the fluid are removed, and sodium is released into the water. The continuously shaking ion exchange resin filler will increase the contact area with the fluid, thereby greatly improving the ion exchange efficiency, removing more calcium ions and magnesium ions in the fluid, and further reducing the generation of later-stage dirt. Finally, the fluid after scale removal will enter the plate heat exchanger through the communication hole and the fluid inlet for heat exchange. During the exchange process, the cold fluid will flow from bottom to top. When the cold fluid enters the flow limiting mechanism in the plate, due to the blocking of the lower hook body of the baffle plate, most of the fluid will always flow along the route of the main flow channel. Therefore, the cold fluid will only be affected by its own gravity and will flow smoothly from bottom to top and maintain a stable flow rate. The hot fluid will move from top to bottom. When the hot fluid enters the flow limiting mechanism in the plate, since the pointed end of the flow dividing plate will divide the fluid into two, the fluid entering the flow dividing channel will be affected by the bottom hook body of the baffle plate and turn, meeting the fluid in the main flow channel, and the two will collide, thereby losing kinetic energy. Therefore, the hot fluid moving from top to bottom will be continuously decelerated by the flow limiting mechanism to counteract the accelerating effect of its own gravity, so that it will also maintain a relatively stable flow rate. This can not only improve the heat exchange efficiency of the cold fluid and the hot fluid, but also reduce the change in fluid flow rate and the formation of vortices, thereby reducing the formation of dirt.

[0013] The present invention provides a plate heat exchanger for preventing scale and blockage. It has the following beneficial effects:

[0014] 1. The present invention sets up a descaling mechanism, so that before the fluid enters the interior of the device, part of the calcium ions and magnesium ions in the fluid are filtered out by the semi-permeable membrane, and then part of the calcium ions and magnesium ions in the fluid are removed by the ion exchange resin filler, thereby greatly reducing the formation of dirt during the heat exchange process of the fluid and achieving the purpose of scale inhibition.

[0015] 2. The present invention sets up a flow-limiting mechanism in the middle of the plate, so that the fluid is always smooth when moving from bottom to top and maintains a stable flow rate. When moving from top to bottom, it will continuously decelerate to counteract the accelerating effect of its own gravity, so that a relatively stable flow rate will also be maintained. This can not only improve the heat exchange efficiency of the cold fluid and the hot fluid, but also reduce the change of the fluid flow rate and the formation of eddies, thereby reducing the formation of dirt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the present invention;

[0017] Figure 2 is a schematic diagram of the internal structure of the descaling mechanism in the present invention;

[0018] Figure 3 is Figure 2 an enlarged view of part A in

[0019] Figure 4 is a schematic diagram of the internal structure of the rotating body in the present invention;

[0020] Figure 5 is a schematic diagram of the structure of the plate in the present invention;

[0021] Figure 6 is Figure 5 an enlarged view of part B in

[0022] Among them, 1. Fixed plate; 2. Guide rod; 3. Movable plate; 4. Support pillar; 5. Tie rod; 6. Plate; 7. Descaling mechanism; 701. Shell; 702. Partition plate; 703. Perforated plate; 704. Venturi tube; 705. Semi-permeable membrane; 706. Rotating rod; 707. Spiral guide vane; 708. DC motor; 709. Ion exchange resin filler; 710. Communication hole; 711. Rotating body; 712. Inclined groove; 713. Ball; 714. Metal outer ring; 715. Swing rod; 716. Connecting rod; 717. Push-pull rod; 718. Water inlet; 8. Fluid inlet and outlet; 9. Flow-limiting mechanism; 901. Shunt plate; 902. Flow-blocking plate; 903. Pointed end; 904. Rounded end; 905. Hook body; 906. Main flow channel; 907. Shunt channel; 10. Flow-through hole; 11. Sealing rubber ring. DETAILED DESCRIPTION OF THE INVENTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Embodiment:

[0025] Please refer to the attached Figure 1 - attached Figure 6 , the embodiment of the present invention provides a plate heat exchanger for scale prevention and blockage prevention. As Figure 1 shown, it includes a fixing plate 1. Guide rods 2 are fixedly connected to both the upper and lower sides of one end of the fixing plate 1 for installation and fixing. The middle outer diameters of the guide rods 2 are respectively movably connected to the upper and lower sides inside the movable plate 3. The movable plate 3 can move back and forth, so as to facilitate the extrusion and fixation of the plate 6, which is convenient for installation, disassembly and maintenance. A number of closely connected plates 6 are arranged between the fixing plate 1 and the movable plate 3. Notches are provided at both the upper and lower ends of the plate 6, and protrusions that fit the notches are provided at the inner ends of the guide rods 2, so as to improve the installation firmness of the plate 6, which is the main structure for realizing heat exchange and is made of heat-conducting metal. A descaling mechanism 7 is provided in the middle of the outer side end of the fixing plate 1 for pre-descaling the fluid about to enter the equipment, reducing the accumulation of dirt inside the equipment in the later stage. Four fluid inlets and outlets 8 are also provided at the outer side end of the fixing plate 1. A number of flow-limiting mechanisms 9 are provided in the middle of the plate 6 for restricting the flow rate of the fluid inside the equipment, reducing the generation of eddy currents, and reducing the accumulation of dirt inside.

[0026] The flow-limiting mechanism 9 includes a flow-dividing plate 901 and a flow-blocking plate 902, which are respectively used for dividing the fluid and blocking the fluid. The flow-dividing plate 901 is fixedly arranged on one side of the flow-blocking plate 902. A pointed end 903 is provided at the top of the flow-dividing plate 901, and the pointed end 903 can divide the incoming fluid into two parts. A round end 904 is provided at the bottom of the flow-dividing plate 901. A hook body 905 is provided at the bottom of the flow-blocking plate 902. A main flow channel 906 is provided on the side of the flow-dividing plate 901 away from the flow-blocking plate 902. A flow-dividing channel 907 is provided on the side of the flow-dividing plate 901 close to the flow-blocking plate 902. The fluid in the flow-dividing channel 907 will change the movement direction through the hook body 905, so as to collide with the fluid in the main flow channel 906, causing energy loss.

[0027] Specifically, during the heat exchange process, the cold fluid flows from bottom to top. When the cold fluid enters the flow limiting mechanism 9 inside the plate 6, due to the blocking of the lower half hook body 905 of the baffle 902, most of the fluid will always flow along the route of the main flow channel 906. Therefore, the cold fluid is only affected by its own gravity and will flow smoothly from bottom to top and maintain a stable flow rate. The hot fluid flows from top to bottom. When the hot fluid enters the flow limiting mechanism 9 inside the plate 6, since the pointed end 903 of the flow dividing plate 901 divides the fluid into two parts, the fluid entering the flow dividing channel 907 will be affected by the bottom hook body 905 of the baffle 902 and turn, meeting the fluid in the main flow channel 906, and the two will collide, thus losing kinetic energy. Therefore, the hot fluid flowing from top to bottom will be continuously decelerated by the flow limiting mechanism 9 to counteract the accelerating effect of its own gravity, and thus will also maintain a relatively stable flow rate. This can not only improve the heat exchange efficiency between the cold fluid and the hot fluid, but also reduce the change in fluid flow rate and the formation of vortices, thereby reducing the formation of dirt.

[0028] In this embodiment, the ends of the guide rods 2 are respectively fixedly connected to the upper and lower sides of the support columns 4 for connection and fixation. The inner sides of the guide rods 2 and the movable plate 3 are both installed and fixed by a plurality of tension rods 5 to improve the installation firmness of the plate 6. Four fluid inlets and outlets 8 are also provided at the outer side end of the fixed plate 1. The fluid inlets and outlets 8 include a hot fluid inlet provided on one side of the upper part of the fixed plate 1, a hot fluid outlet provided on one side of the lower part of the fixed plate 1, a cold fluid outlet provided on the other side of the upper part of the fixed plate 1, and a cold fluid inlet provided on the other side of the lower part of the fixed plate 1, which are respectively used for introducing hot fluid, discharging hot fluid, introducing cold fluid, and discharging cold fluid. Flow holes 10 are provided at the four corners inside the plate 6 to facilitate the fluid to enter between the two plates 6 for heat exchange. Sealing rubber rings 11 are fixedly connected to the inner circles of the flow holes 10 to improve the sealing performance.

[0029] Furthermore, the descaling mechanism 7 includes two shells 701, which are respectively fixedly installed on the upper and lower sides of the outer side end of the fixed plate 1 for connection and fixation. Partition plates 702 are provided inside the shells 701. The partition plates 702 divide the shells 701 into an inner filtering chamber and an outer ion exchange chamber. The filtering chamber conducts a preliminary process on the fluid, and the ion exchange chamber is used for ion exchange of the fluid. Communication holes 710 are provided at the positions corresponding to the fluid inlets and outlets 8 at the inner side ends of the partition plates 702 to introduce the descaled fluid into the equipment interior. Water inlets 718 are provided on the mutually remote sides of the outer side ends of the shells 701, and the positions of the water inlets 718 are located in the filtering chamber to introduce fluid into the filtering chamber.

[0030] Further, punching plates 703 are fixedly installed on both sides of the interior of the filtration chamber that are far away from each other. Multiple through holes are provided on the surface of the punching plates 703. A plurality of Venturi tubes 704 are fixedly connected to the inner ends of the punching plates 703. The Venturi tubes 704 are conical in shape. When the fluid flows through, the flow rate increases and the pressure increases due to the narrowing of the space. At least one semi-permeable membrane 705 is fixedly installed on both sides of the interior of the filtration chamber that are close to each other. The semi-permeable membrane 705 can prevent the passage of calcium and magnesium ions, etc., thereby generating softened fluid. Ion exchange resin fillers 709 are movably arranged inside the ion exchange chamber. The resin carries sodium ions. When water passes through, calcium ions and magnesium ions will exchange with the sodium ions on the resin, so that calcium and magnesium in the water are removed, and sodium is released into the water. As time goes by, the resin will gradually become saturated and needs to be regenerated, which is usually achieved by flushing the resin with brine (sodium chloride solution).

[0031] Further, a DC motor 708 is fixedly installed on the top of the upper housing 701. A rotating rod 706 is fixedly installed at the driving end of the DC motor 708, and the end of the rotating rod 706 extends to the bottom wall of the lower housing 701. Spiral guide vanes 707 are fixedly installed on the outer diameter of the rotating rod 706 between the punching plates 703 and the semi-permeable membranes 705. The DC motor 708 is used to drive the rotation of the rotating rod 706. The rotating rotating rod 706 drives the spiral guide vanes 707 to rotate accordingly, thereby guiding the fluid movement and further increasing the pressure of the fluid, so that the fluid can better pass through the semi-permeable membrane 705.

[0032] Specifically, first, hot fluid and cold fluid are respectively introduced into the interior of the housing 701 through the upper and lower water inlets 718. After the fluid enters the interior of the housing 701, it will pass through the punching plates 703 and the Venturi tubes 704 in the filtration chamber. Since the Venturi tubes 704 are conical in shape, the flow rate of the fluid will increase and the pressure will increase after passing through the Venturi tubes 704. At this time, the DC motor 708 is started, and the rotating rod 706 is driven to rotate by the DC motor 708, driving the spiral guide vanes 707 on the upper and lower sides to rotate. The rotating spiral guide vanes 707 are used to guide the fluid to further increase the fluid pressure, so that the fluid passes through the semi-permeable membrane 705. The semi-permeable membrane 705 can prevent the passage of calcium, magnesium and other ions in the fluid, thereby softening the fluid and reducing the generation of later dirt.

[0033] Further, a rotating body 711 is fixedly connected to the outer diameter of the middle part of the rotating rod 706. An inclined groove 712 is provided on the outer diameter of the rotating body 711. The inclined groove 712 is inclined. A metal outer ring 714 is movably arranged outside the rotating body 711. A number of balls 713 are movably arranged between the inclined groove 712 and the metal outer ring 714. The metal outer ring 714 and the balls 713 form a bearing seat without an inner ring. When the rotating body 711 rotates, it will drive the balls 713 in the inclined groove 712 to move up and down, thereby driving the metal outer ring 714 to move up and down. Both ends of the metal outer ring 714 are fixedly connected with swing rods 715. The ends of the swing rods 715 are movably connected with connecting rods 716 respectively. When the metal outer ring 714 moves up and down, it will drive the swing rods 715 to move accordingly, thereby driving one end of the connecting rod 716 to move accordingly. The ends of the connecting rods 716 are movably connected with push-pull rods 717 respectively. When one end of the connecting rod 716 moves, it will drive the push-pull rod 717 to move by pushing or pulling. The middle part of the push-pull rod 717 is movably arranged on the sleeve of the housing 701 to improve the stability of the movement. The ends of the push-pull rods 717 penetrate through the outer wall of the corresponding side housing 701 and are fixedly connected to one end of the ion exchange resin filler 709. The continuously moving up and down push-pull rods 717 are used to drive the ion exchange resin filler 709 to shake up and down, increasing the contact area between the fluid and the resin and improving the ion exchange efficiency.

[0034] Specifically, the filtered fluid will enter the ion exchange chamber from the filtration chamber. Since the rotating rod 706 will also drive the rotating body 711 to rotate when rotating, the rotating rotating body 711 will drive the balls 713 in the inclined groove 712 to move, thereby driving the metal outer ring 714 to swing reciprocally. The swinging metal outer ring 714 drives the push-pull rods 717 at both ends to move up and down through the transmission of the connecting rod 716, thereby driving the ion exchange resin filler 709 in the ion exchange chamber to shake up and down continuously. The ion exchange resin filler 709 carries sodium ions. When the fluid passes through, the calcium ions and magnesium ions inside will exchange with the sodium ions on the ion exchange resin filler 709, so that the calcium and magnesium in the fluid are removed, and the sodium is released into the water. The continuously shaking ion exchange resin filler 709 will increase the contact area with the fluid, thereby greatly improving the ion exchange efficiency, removing more calcium ions and magnesium ions in the fluid, and further reducing the generation of dirt in the later stage. Finally, the fluid after descaling will enter the plate heat exchanger through the communication hole 710 and the fluid inlet and outlet 8 for heat exchange.

[0035] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A scale-proof and anti-clogging plate heat exchanger, comprising a fixed plate (1), characterized in that: A guide rod (2) is fixedly connected to the upper and lower sides of one end of the fixed plate (1); the middle outer diameter of the guide rod (2) is movably connected to the upper and lower sides of the inner side of the movable plate (3); a plurality of closely connected plates (6) are provided between the fixed plate (1) and the movable plate (3); a descaling mechanism (7) is provided in the middle of the outer end of the fixed plate (1); four fluid inlets and outlets (8) are also provided at the outer end of the fixed plate (1); and a plurality of flow limiting mechanisms (9) are provided in the middle of each of the plates (6); The flow limiting mechanism (9) comprises a diverter plate (901) and a baffle plate (902); the diverter plate (901) is fixedly arranged on one side of the baffle plate (902); a pointed end (903) is provided at the top of the diverter plate (901); a rounded end (904) is provided at the bottom of the diverter plate (901); a hook body (905) is provided at the bottom of the baffle plate (902); a main flow channel (906) is provided on the side of the diverter plate (901) away from the baffle plate (902); and a diverter channel (907) is provided on the side of the diverter plate (901) close to the baffle plate (902).

2. The scale-resistant and anti-clogging plate heat exchanger according to claim 1, characterized in that: The ends of the guide rod (2) are respectively fixedly connected to the upper and lower sides of the pillar (4), and the inner ends of the guide rod (2) and the movable plate (3) are both fixedly mounted via a plurality of tension screws (5).

3. The scale-resistant and anti-clogging plate heat exchanger according to claim 1, characterized in that: The outer end of the fixed plate (1) is also provided with four fluid inlets and outlets (8), the fluid inlets and outlets (8) comprising a hot fluid inlet arranged on one side of the upper portion of the fixed plate (1), a hot fluid outlet arranged on one side of the lower portion of the fixed plate (1), a cold fluid outlet arranged on the other side of the upper portion of the fixed plate (1), and a cold fluid inlet arranged on the other side of the lower portion of the fixed plate (1).

4. The scale-resistant and anti-clogging plate heat exchanger according to claim 1, characterized in that: The plate (6) is provided with flow holes (10) at the four inner corners, and a sealing rubber ring (11) is fixedly connected to the inner circle of the flow hole (10).

5. The scale-resistant and anti-clogging plate heat exchanger according to claim 1, characterized in that: The descaling mechanism (7) comprises two shells (701), the shells (701) being fixedly mounted on the upper and lower sides of the outer ends of the fixing plate (1), respectively; a partition plate (702) is provided inside the shells (701), the partition plates (702) divide the shells (701) into an inner filter chamber and an outer ion exchange chamber; a connecting hole (710) is provided at a position of the inner end of the partition plate (702) corresponding to the fluid inlet and outlet (8); and a water inlet (718) is provided on the side of the outer end of the shell (701) away from each other.

6. The scale-resistant and anti-clogging plate heat exchanger according to claim 5, characterized in that: A perforated plate (703) is fixedly installed on the side away from each other inside the filter chamber, and a plurality of venturi tubes (704) are fixedly connected to the inner end of the perforated plate (703). At least one semipermeable membrane (705) is fixedly installed on the side close to each other inside the filter chamber, and an ion exchange resin filler (709) is movably arranged inside the ion exchange chamber.

7. The scale-resistant and anti-clogging plate heat exchanger according to claim 6, characterized in that: A DC motor (708) is fixedly mounted on the top of the upper shell (701), a rotating rod (706) is fixedly mounted on the driving end of the DC motor (708), and the end of the rotating rod (706) extends to the bottom wall of the lower shell (701), and spiral guide blades (707) are fixedly mounted on the outer diameter of the rotating rod (706) located between the punching plate (703) and the semipermeable membrane (705).

8. The scale-resistant and anti-clogging plate heat exchanger according to claim 7, characterized in that: A rotating body (711) is fixedly connected to the outer diameter of the middle part of the rotating rod (706), an inclined groove (712) is provided on the outer diameter of the rotating body (711), a metal outer ring (714) is movably provided on the outside of the rotating body (711), a plurality of balls (713) are movably provided between the inclined groove (712) and the metal outer ring (714), both ends of the metal outer ring (714) are fixedly connected to a rocker rod (715), the ends of the rocker rod (715) are movably connected to a connecting rod (716), the ends of the connecting rod (716) are movably connected to a push-pull rod (717), and the ends of the push-pull rod (717) pass through the outer wall of the shell (701) on the corresponding side and are fixedly connected to one end of the ion exchange resin filler (709).

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