On-line cleaning system for plate heat exchanger

Abstract

The plate heat exchanger online cleaning system comprises a plate heat exchanger body, a connecting mechanism and a movable cleaning device, four connectors are arranged on one side of the plate heat exchanger body and are a hot medium inlet, a hot medium outlet, a cold medium inlet and a cold medium outlet respectively, the connecting mechanism is connected with the hot medium inlet and the hot medium outlet, and the movable cleaning device is connected with the connecting mechanism. The connecting mechanism is provided with two connecting interfaces; the movable cleaning device comprises a movable frame, a medicine adding tank and a cleaning circulation mechanism are arranged on the top of the movable frame, and two connectors are arranged on the cleaning circulation mechanism. The connecting mechanisms are mounted on the thermal medium inlet and the thermal medium outlet, so that the movable cleaning device can be connected with the thermal medium inlet and the thermal medium outlet through the connecting interfaces, cleaning operation can be completed without disassembling the plate heat exchanger, the problem that a sealing gasket is not mounted in place in the disassembling and assembling process is solved, and the working efficiency is improved. The sealing performance and the using performance of equipment are effectively guaranteed, and the overhaul and maintenance difficulty is reduced.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger cleaning technology, specifically to an online cleaning system for plate heat exchangers. Background Technology

[0002] A plate heat exchanger is a heat exchange device composed of a set of corrugated metal plates with channels for two heat transfer liquids to pass through. These metal plates are installed in a frame with a fixed plate and a movable clamping plate on one side and are clamped and fixed by clamping bolts. Sealing gaskets are also installed between the plates to seal the liquid channels and guide the fluids to flow alternately into their respective channels to achieve heat exchange.

[0003] Currently available plate heat exchangers are relatively large in size, requiring disassembly for maintenance and cleaning. However, the reinstallation of gaskets is difficult, and improper installation during disassembly can easily lead to misalignment, compromising the equipment's sealing performance and impacting its overall performance. This creates significant challenges for maintenance and repair. Furthermore, traditional cleaning methods require dedicated cleaning equipment, resulting in poor versatility, high costs, and low chemical utilization during the cleaning process. Therefore, there is an urgent need to design an online cleaning system for plate heat exchangers to address these issues. Summary of the Invention

[0004] The purpose of this invention is to provide an online cleaning system for plate heat exchangers to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The plate heat exchanger online cleaning system includes a plate heat exchanger body, a connecting mechanism, and a mobile cleaning device. The plate heat exchanger body has four ports on one side, namely a hot medium inlet, a hot medium outlet, a cold medium inlet, and a cold medium outlet. The connecting mechanism is connected to the hot medium inlet and the hot medium outlet, and the connecting mechanism has two connection ports. The mobile cleaning device includes a mobile frame, and a dosing tank and a cleaning circulation mechanism are provided on the top of the mobile frame. The cleaning circulation mechanism is provided with two connectors, and the two connectors correspond to the two connection interfaces respectively.

[0006] Furthermore, the connection mechanism includes an inlet pipe installed at one end of the heat medium inlet and an outlet pipe installed at one end of the heat medium outlet. The two connection interfaces are respectively provided on the inlet pipe and the outlet pipe. An adjustment pipe is provided between the inlet pipe and the outlet pipe, and a solenoid valve is provided on one side of the adjustment pipe.

[0007] Furthermore, a control valve is provided on the connection interface, a sealing cap is provided at one end of the connection interface, and pressure gauges are provided on both the heat medium inlet and the heat medium outlet.

[0008] Furthermore, the bottom of the mobile frame is equipped with multiple casters, the top of the mobile frame is provided with a tray corresponding to the dosing tank, the top of the mobile frame is equipped with a bracket, the cleaning and circulation mechanism is installed on one side of the bracket, and the mobile frame is provided with fixing mechanisms on both sides.

[0009] Furthermore, the cleaning circulation mechanism includes a water pump installed on the top of the mobile frame, an equipment box installed on one side of the support, a water pumping pipe installed at the input end of the water pump, and a water outlet pipe installed at the output end of the water pump. The water outlet pipe is connected to the bottom of the equipment box. A return water pipe connected to the top of the dosing tank is provided on the top of the equipment box. The water pumping pipe is connected to the bottom of one side of the dosing tank. Two external pipes corresponding to the water outlet pipe and the return water pipe are provided on the bottom of the equipment box. Two connectors are respectively provided at one end of the two external pipes.

[0010] Furthermore, the fixing mechanism includes a fixing plate disposed on one side of the movable frame, a lead screw threaded in the fixing plate, and a fixing block rotatably engaged at the bottom end of the lead screw, with a rotating wheel installed at the top end of the lead screw.

[0011] Furthermore, a drain pipe is provided on one side of the water outlet pipe, and manual valves are provided on the water pumping pipe, the water outlet pipe, and the drain pipe.

[0012] Furthermore, a take-up reel is rotatably fitted on one side of the bracket, and two outer pipes are wound around the periphery of the take-up reel. Two fixing clips are installed on one side of the bracket, and the two fixing clips are respectively engaged with the two connectors.

[0013] Furthermore, the equipment box is provided with a cleaning chamber, one side of which is transparent, and a removable filter plate corresponding to the cleaning chamber is provided on one side of the equipment box.

[0014] Furthermore, the top of the dosing tank is threaded with a cover plate, and a rotating rod is rotatably fitted inside the cover plate. Multiple stirring rods are arranged around the rotating rod, and a crank is installed at the top of the rotating rod. A dosing pipe is provided at the top of the dosing tank.

[0015] In the above technical solution, the online cleaning system for plate heat exchangers provided by the present invention has the following advantages: By installing connecting mechanisms at the heat medium inlet and outlet, the mobile cleaning device can be connected to the heat medium inlet and outlet via connection interfaces. This allows cleaning operations to be completed without disassembling the plate heat exchanger, avoiding the problem of improper installation of sealing gaskets during disassembly and assembly. This effectively ensures the sealing performance and usability of the equipment, reduces the difficulty of inspection and maintenance, and allows the mobile cleaning device to be flexibly moved to the corresponding position to adapt to the cleaning needs of plate heat exchangers of different locations and specifications. It has strong versatility, reduces the investment in dedicated cleaning equipment, and lowers equipment costs. The chemical dosing tank and cleaning circulation mechanism ensure that the chemical cleaning agent is mixed evenly and fully contacts the heat exchange surface, resulting in a more thorough cleaning effect, while improving the utilization rate of the agent and reducing cleaning costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the cleaning system provided in an embodiment of the online cleaning system for plate heat exchangers of the present invention.

[0018] Figure 2 This is a schematic diagram of the connection mechanism provided in an embodiment of the online cleaning system for plate heat exchangers of the present invention.

[0019] Figure 3 This is a schematic diagram of the mobile cleaning device provided in an embodiment of the online cleaning system for plate heat exchangers of the present invention.

[0020] Figure 4 A schematic diagram of the winding reel structure provided in an embodiment of the online cleaning system for plate heat exchangers of the present invention.

[0021] Figure 5 This is a schematic diagram of the dosing tank structure provided in an embodiment of the online cleaning system for plate heat exchangers of the present invention.

[0022] Figure 6 This is a schematic diagram of the equipment box structure provided for an embodiment of the online cleaning system for plate heat exchangers of the present invention.

[0023] Explanation of reference numerals in the attached figures: 1. Plate heat exchanger body; 2. Connecting mechanism; 3. Mobile cleaning device; 4. Hot medium inlet; 5. Hot medium outlet; 6. Cold medium inlet; 7. Cold medium outlet; 8. Connection interface; 9. Mobile frame; 10. Dosing tank; 11. Cleaning circulation mechanism; 12. Connector; 13. Inlet pipe; 14. Outlet pipe; 15. Control valve; 16. Sealing cover; 17. Pressure gauge; 18. Casters; 19. Tray; 20. 21. Support frame; 22. Fixing mechanism; 23. Water pump; 24. Equipment box; 25. Pumping pipe; 26. Outlet pipe; 27. Return pipe; 28. External connecting pipe; 29. ​​Drain pipe; 30. Manual valve; 31. Winding reel; 32. Fixing clip; 33. Fixing plate; 34. Screw; 35. Fixing block; 36. Cover plate; 37. Rotating rod; 38. Stirring rod; 39. Dosing pipe; 40. Cleaning chamber; 51. Removable filter plate. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1-6 As shown in the embodiment of the present invention, an online cleaning system for plate heat exchangers is provided.

[0026] It includes a plate heat exchanger body 1, a connecting mechanism 2, and a mobile cleaning device 3. The plate heat exchanger body 1 has four ports on one side, namely a hot medium inlet 4, a hot medium outlet 5, a cold medium inlet 6, and a cold medium outlet 7. The connecting mechanism 2 is connected to the hot medium inlet 4 and the hot medium outlet 5, and has two connecting interfaces 8. The mobile cleaning device 3 includes a mobile frame 9. The top of the mobile frame 9 is provided with a dosing tank 10 and a cleaning circulation mechanism 11. The cleaning circulation mechanism 11 is provided with two connectors 12, which correspond to two connection interfaces 8 respectively.

[0027] Reference Figure 2The connection mechanism 2 in this embodiment includes an inlet pipe 13 installed at one end of the heat medium inlet 4 and an outlet pipe 14 installed at one end of the heat medium outlet 5. Two connection interfaces 8 are respectively provided on the inlet pipe 13 and the outlet pipe 14. An adjustment pipe is provided between the inlet pipe 13 and the outlet pipe 14, and a solenoid valve is provided on one side of the adjustment pipe. The regulating pipe and solenoid valve enable pressure balancing. Before or during cleaning, the regulating pipe connects the inlet pipe 13 and the outlet pipe 14 to quickly balance the pressure in both pipes, preventing damage to the internal components of the plate heat exchanger due to excessive pressure difference. This also ensures the safety of subsequent pipeline connections. If it is necessary to adjust the chemical flow distribution or flush certain pipelines separately during cleaning, the regulating pipe can serve as a temporary diversion channel. It can be used in conjunction with other valves to achieve flexible loop switching and improve the targeting of cleaning. The regulating pipe can guide the residual hot medium in the inlet pipe 13, outlet pipe 14, and heat exchanger to the outlet side for discharge, preventing the residual medium from mixing with the cleaning agent and affecting the cleaning effect, while reducing medium waste. The solenoid valve can quickly control the opening and closing of the regulating pipe via electrical signals, eliminating the need for manual operation and automating the switching of pressure balancing and diversion actions in the cleaning process, thus improving operational convenience and efficiency.

[0028] Reference Figure 2 In this embodiment, a regulating valve 15 is provided on the connection interface 8, and a sealing cap 16 is provided on one end of the connection interface 8. Pressure gauges 17 are provided on both the hot medium inlet 4 and the hot medium outlet 5. The regulating valve 15 can be opened during cleaning to form a connected loop between the mobile cleaning device 3 and the inlet pipe 13 and the outlet pipe 14, ensuring smooth flow of the cleaning agent. When not cleaning, the valve 15 is closed to completely isolate the connection interface 8 from the inlet pipe 13 and the outlet pipe 14, preventing medium leakage or crossflow. The opening of the valve 15 can be flexibly adjusted according to cleaning needs to control the flow rate of the cleaning agent flowing through the connection interface 8, adapting to cleaning scenarios with different scale thicknesses, improving the cleaning effect and avoiding agent waste.

[0029] Reference Figure 3 In this embodiment, the bottom of the mobile frame 9 is equipped with multiple casters 18, and the top of the mobile frame 9 is provided with a tray 19 corresponding to the dosing tank 10. A bracket 20 is installed on the top of the mobile frame 9, and the cleaning and circulation mechanism 11 is installed on one side of the bracket 20. Fixing mechanisms 21 are provided on both sides of the mobile frame 9. The tray 19 corresponds to the structure of the dosing tank 10, providing a dedicated placement position for the dosing tank 10, achieving precise positioning of the dosing tank 10, avoiding displacement and shaking of the dosing tank 10 during movement, and ensuring the stability of the equipment during movement. The bracket 20 provides a fixed mounting point for the cleaning and circulation mechanism 11.

[0030] Reference Figure 3The cleaning circulation mechanism 11 in this embodiment includes a water pump 22 installed on the top of the mobile frame 9, an equipment box 23 installed on one side of the bracket 20, a water pump pipe 24 installed at the input end of the water pump 22, and a water outlet pipe 25 installed at the output end of the water pump 22. The water outlet pipe 25 is connected to the bottom of the equipment box 23. The top of the equipment box 23 is provided with a return water pipe 26 connected to the top of the dosing tank 10. The water pump pipe 24 is connected to the bottom of one side of the dosing tank 10. The bottom of the equipment box 23 is provided with two external pipes 27 corresponding to the water outlet pipe 25 and the return water pipe 26. Two connectors 12 are respectively provided at one end of the two external pipes 27. The water pump 22 serves as the power core, drawing the prepared cleaning agent from the dosing tank 10 through the water pumping pipe 24. Simultaneously, it provides stable pressure to deliver the agent via the outlet pipe 25 to the equipment box 23, providing continuous power for the entire cleaning cycle and ensuring smooth flow of the agent through the heat exchanger. The return pipe 26 connects the top of the equipment box 23 to the top of the dosing tank 10, forming a cleaning agent return channel. This guides the agent that has completed the cleaning operation through the heat exchanger back to the dosing tank 10, achieving agent recycling and reducing cleaning costs. The external pipe 27 serves as… The transition pipe between the equipment box 23 and the heat exchanger connection interface 8 has one end precisely connected to the equipment box 23, and the other end is detachably connected to the heat exchanger connection interface 8 via the connector 12, realizing quick connection between the cleaning circuit and the heat exchanger, adapting to the disassembly and assembly requirements of online cleaning. The connector 12 is set at the end of the external pipe 27 for quick and precise connection with the heat exchanger connection interface 8, ensuring the sealing of the external pipe 27 after connection with the connection interface 8, preventing leakage of cleaning agents, and facilitating disassembly and assembly, thereby improving the efficiency of cleaning operation switching.

[0031] Reference Figure 4 The fixing mechanism 21 in this embodiment includes a fixing plate 32 disposed on one side of the movable frame 9, a lead screw 33 threaded into the fixing plate 32, and a fixing block 34 rotatably fitted to the bottom end of the lead screw 33. A rotating wheel is installed at the top of the lead screw 33. The fixing plate 32 serves as the mounting base for the fixing mechanism, providing a stable threaded mounting carrier for the lead screw 33. At the same time, through the fixed connection with the movable frame 9, the entire fixing mechanism is firmly assembled to the side of the movable frame 9, ensuring that the structure does not loosen or deform under force. The lead screw 33 utilizes the thread transmission principle to convert the rotational motion of the rotating wheel into its own linear lifting motion, driving the bottom fixing block 34 to move up and down, realizing the contact and pressing or separation and unlocking of the fixing block 34 with the ground. It is the core component for transmitting force.

[0032] Reference Figure 3In this embodiment, a drain pipe 28 is provided on one side of the water outlet pipe 25, and a manual valve 29 is provided on the water pumping pipe 24, the water outlet pipe 25 and the drain pipe 28. After the cleaning operation is completed, the waste cleaning agent or sewage remaining in the dosing tank 10 can be discharged through the drain pipe 28 for centralized collection and treatment, which meets the requirements of environmental protection operation. When it is necessary to repair or replace the agent in the dosing tank 10 and the cleaning circulation mechanism 11 pipeline, the residual agent or water in the system can be quickly drained through the drain pipe 28, providing a dry and safe working environment for the repair operation and avoiding interference from the residual agent with the maintenance work. If the agent deteriorates or the pipeline is blocked, resulting in abnormal pressure, etc., during the cleaning process, the drain pipe 28 can be used as an emergency discharge channel to quickly discharge the abnormal medium, reduce the pressure in the system, and prevent the fault from expanding and causing safety risks. The manual valves 29 on the pumping pipe 24, the outlet pipe 25 and the drain pipe 28 can independently control the opening and closing of the corresponding pipelines. They are opened during the cleaning operation to realize the extraction and transportation of the agent, and closed when not cleaning or during maintenance to cut off the connection between the pipeline and other parts of the system and prevent the medium from leaking or flowing back.

[0033] Reference Figure 4 In this embodiment, a take-up reel 30 is rotatably fitted on one side of the bracket 20. Two outer tubes 27 are wound around the periphery of the take-up reel 30. Two fixing clips 31 are installed on one side of the bracket 20, and the two fixing clips 31 are respectively engaged with the two connectors 12. The take-up reel 30 can wind and store the idle outer tubes 27 around its periphery, preventing the outer tubes 27 from being dragged or scattered, which could lead to knots, wear, or crushing. This ensures the integrity of the outer tubes 27 and extends their service life. After the outer tubes 27 are wound up, the connectors 12 are engaged with the fixing clips 31 to achieve precise positioning and fixation of the connectors 12, preventing the connectors 12 from shaking and colliding with the pipeline, and preventing wear, deformation, or damage to the sealing surface of the connectors 12.

[0034] Reference Figure 6 In this embodiment, the equipment housing 23 is provided with a cleaning chamber 39, one side of which is transparent. A removable filter plate 40 corresponding to the cleaning chamber 39 is provided on one side of the equipment housing 23. The cleaning chamber 39 provides a dedicated space for the cleaning agent to temporarily stay and for filtration operations, slowing down the flow rate of the agent as it flows through this space. This allows the removable filter plate 40 to effectively intercept impurities, improving the filtration effect. The removable filter plate 40 is designed to be detachable. When excessive impurities accumulate on the surface of the filter plate, causing a decrease in filtration efficiency, it can be quickly removed from one side of the equipment housing 23 for cleaning or replacement without disassembling the entire equipment housing 23 or the cleaning circuit, significantly improving maintenance efficiency and reducing downtime.

[0035] Reference Figure 5In this embodiment, the top of the dosing tank 10 is threaded with a cover plate 35, and a rotating rod 36 is rotatably fitted inside the cover plate 35. Multiple stirring rods 37 are arranged around the rotating rod 36, and a crank handle is installed at the top of the rotating rod 36. A dosing pipe 38 is provided at the top of the dosing tank 10. The rotating rod 36 drives the stirring rods 37 to rotate, which can quickly stir the clean water and chemical cleaning agent in the dosing tank, ensuring that the agent is fully dissolved and evenly dispersed, avoiding localized excessively high or low concentrations, ensuring stable performance of the cleaning agent, and improving the scale removal effect. The dosing pipe 38 serves as a dedicated dosing channel, directly guiding the chemical cleaning agent into the dosing tank 10, preventing spillage and waste, and facilitating control of the agent dosage. Combined with the liquid level observation component, precise proportioning can be achieved.

[0036] Working principle: In use, first close the media supply to the hot medium inlet 4, hot medium outlet 5, cold medium inlet 6, and cold medium outlet 7. When the pressure inside the pipeline is zero as observed by pressure gauge 17, open the sealing cap 16 on the connection interface 8. Then, pull out two external pipes 27 from the reel 30, connecting the two connectors 12 to the two connection interfaces 8 respectively. After fixing, add water and chemical cleaning agent to the dosing tank 10, stir and mix, and observe the dosage and concentration effect. Then, open the regulating valve 15 on the connection interface 8 and start the water pump 22 to draw cleaning water from the dosing tank 10, allowing the cleaning water to flow through the outlet pipe 25 to one of the external pipes 27. The cleaning water enters the plate heat exchanger body 1 through the connection of the pipe 27 with the connection interface 8 and the connector 12 for cleaning. It enters from the hot medium outlet 5 on one side of the plate heat exchanger body 1 and exits at the cold medium inlet 6. It flows back to another external pipe 27 through the connection of the connection interface 8 and the connector 12. After passing through the filter in the equipment box 23, it flows back to the dosing tank 10 through the return water pipe 26. The cycle continues. After cleaning is completed, the water pump 22 is turned off, and then the control valve 15 is turned off. The connection interface 8 and the connector 12 are disassembled and the external pipe 27 is put away. The medium supply of the hot medium inlet 4, the hot medium outlet 5, the cold medium inlet 6 and the cold medium outlet 7 is reopened.

[0037] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An online cleaning system for plate heat exchangers, comprising a plate heat exchanger body (1), a connecting mechanism (2) and a mobile cleaning device (3), characterized in that, The plate heat exchanger body (1) is provided with four interfaces on one side, which are hot medium inlet (4), hot medium outlet (5), cold medium inlet (6) and cold medium outlet (7), the connecting mechanism (2) is connected with the hot medium inlet (4) and the hot medium outlet (5), and the connecting mechanism (2) is provided with two connecting interfaces (8); The mobile cleaning device (3) comprises a mobile frame (9), a dosing tank (10) and a cleaning circulation mechanism (11) are arranged on the top of the mobile frame (9), two connecting heads (12) are arranged on the cleaning circulation mechanism (11), and the two connecting heads (12) correspond to the two connecting interfaces (8) respectively.

2. The plate heat exchanger on-line cleaning system according to claim 1, characterized in that, The connecting mechanism (2) comprises an inlet pipe (13) mounted at one end of the hot medium inlet (4), an outlet pipe (14) mounted at one end of the hot medium outlet (5), and two connecting interfaces (8) arranged on the inlet pipe (13) and the outlet pipe (14) respectively, an adjusting pipe is arranged between the inlet pipe (13) and the outlet pipe (14), and an electromagnetic valve is arranged on one side of the adjusting pipe.

3. The plate heat exchanger online cleaning system according to claim 1, characterized in that, The connecting interface (8) is provided with a regulating valve (15), one end of the connecting interface (8) is provided with a sealing cover (16), and a pressure gauge (17) is arranged on the hot medium inlet (4) and the hot medium outlet (5).

4. The plate heat exchanger online cleaning system according to claim 1, characterized in that, A plurality of universal wheels (18) are mounted on the bottom of the mobile frame (9), a tray (19) corresponding to the dosing tank (10) is arranged on the top of the mobile frame (9), a support (20) is mounted on the top of the mobile frame (9), the cleaning circulation mechanism (11) is mounted on one side of the support (20), and fixed mechanisms (21) are arranged on the two sides of the mobile frame (9).

5. The plate heat exchanger online cleaning system according to claim 4, characterized in that, The cleaning circulation mechanism (11) comprises a water pump (22) mounted on the top of the mobile frame (9), a device box (23) mounted on one side of the support (20), a water suction pipe (24) mounted on the input end of the water pump (22), and a water outlet pipe (25) mounted on the output end of the water pump (22), the water outlet pipe (25) is connected with the bottom of the device box (23), the top of the device box (23) is provided with a water return pipe (26) connected with the top of the dosing tank (10), the water suction pipe (24) is connected with the bottom of one side of the dosing tank (10), and the bottom of the device box (23) is provided with two external connecting pipes (27) corresponding to the water outlet pipe (25) and the water return pipe (26), and two connecting heads (12) are arranged at one end of the two external connecting pipes (27).

6. The plate heat exchanger online cleaning system according to claim 4, characterized in that, The fixed mechanism (21) comprises a fixed plate (32) arranged on one side of the mobile frame (9), a lead screw (33) threadedly matched in the fixed plate (32), and a fixed block (34) rotationally matched with the bottom end of the lead screw (33), and a rotating wheel is mounted on the top end of the lead screw (33).

7. The plate heat exchanger online cleaning system according to claim 4, characterized in that, One side of the water outlet pipe (25) is provided with a drain pipe (28), the water suction pipe (24), water outlet pipe (25) and drain pipe (28) are all provided with a manual valve (29).

8. The plate heat exchanger online cleaning system according to claim 5, characterized in that, One side of the support (20) is rotatably connected with a winding disc (30), two outer connecting pipes (27) are wound around the circumferential side of the winding disc (30), one side of the support (20) is provided with two fixed clamps (31), and two fixed clamps (31) are respectively connected with two connecting heads (12).

9. The plate heat exchanger online cleaning system according to claim 6, characterized in that, The cleaning cavity (39) is provided in the equipment box (23), one side of the cleaning cavity (39) is transparent, and one side of the equipment box (23) is provided with a detachable filter plate (40) corresponding to the cleaning cavity (39).

10. The plate heat exchanger online cleaning system according to claim 1, characterized in that, The top of the dosing tank (10) is threadedly connected with a cover plate (35), the cover plate (35) is rotatably connected with a rotating rod (36), a plurality of stirring rods (37) are arranged on the circumferential side of the rotating rod (36), a handle is arranged on the top end of the rotating rod (36), and the top of the dosing tank (10) is provided with a dosing pipe (38).

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