A cleaning device for heat exchange station

Abstract

The utility model discloses a kind of cleaning devices for heat exchange station, belong to heat exchange station technical field, including plate heat exchanger and box, the bottom of the box is provided with cleaning mechanism, water supply mechanism is provided on the box, hot fluid inlet pipe is provided on the plate heat exchanger, cold fluid outlet pipe is provided on the plate heat exchanger, hot fluid outlet pipe is provided on the plate heat exchanger. In the utility model, when the inside of plate heat exchanger is cleaned, the first water pump is used to make the water suction pipe draw out the cleaning agent in the inner cavity of the box, and the high-pressure gas is filled into the inner cavity of the tee joint by using the high-pressure fan, so that the gas and the cleaning agent are in contact, the high-speed water gas enters the plate heat exchanger, the kinetic energy and impact force of high-speed water gas flow are used to clean the inner wall of the plate heat exchanger completely, to ensure the cleaning effect of the plate heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange station technology, and more specifically, to a cleaning device for heat exchange stations. Background Technology

[0002] Heat exchange stations, also known as heat stations, are places where heat is concentrated and exchanged. They are divided into direct supply stations and indirect supply stations according to the form of heating. The former is directly supplied by the power plant to users and is the product of the initial welfare heating of power plant waste heat. Heat exchange stations generally use plate heat exchangers, which need to be cleaned regularly after a certain period of use. The cleaning method is mostly to directly disassemble and clean, but this method is relatively time-consuming and labor-intensive.

[0003] A search revealed that utility model patent CN217653947U discloses an online cleaning device for a heat exchange station, comprising: a housing, a water pump mounted on the housing, a suction pipe and two outlet pipes mounted on the water pump, both of which are connected to the heat exchanger; two return pipes on the housing, both of which are connected to the heat exchanger; and a drain pipe at the bottom of the housing, primarily used to discharge collected impurities. This online cleaning device for the heat exchange station can clean the heat exchanger without disassembling it, significantly reducing cleaning time. However, the aforementioned patent has the following shortcomings: cleaning the heat exchanger solely with cleaning fluid is ineffective, and it is inconvenient to remove residual cleaning fluid from the heat exchanger after cleaning, which can contaminate the water used for subsequent heat exchange. Therefore, we propose a cleaning device for heat exchange stations. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a cleaning device for heat exchange stations.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A cleaning device for a heat exchange station includes a plate heat exchanger and a housing. A cleaning mechanism is installed at the bottom of the housing, and a water supply mechanism is installed on the housing. The plate heat exchanger has a hot fluid inlet pipe and a cold fluid outlet pipe. A first three-way valve is fixedly installed at the bottom of both the hot fluid inlet pipe and the cold fluid outlet pipe, and a second three-way valve is fixedly installed at the bottom of both the hot fluid outlet pipe and the cold fluid inlet pipe. The bottom end of the second three-way valve is fixed... A return water pipe is fixedly connected, with its end fixedly sleeved to the bottom of the inner cavity of the box. A filter screen is fixedly sleeved in the middle of the inner cavity of the box. A first water pump is fixedly installed on the top surface of the box. The input end of the first water pump extends into the inner cavity of the box and is fixedly connected to a water suction pipe. A three-way connector is fixedly connected to the output end of the first water pump. A high-pressure blower is fixedly installed on the top surface of the box. The output end of the high-pressure blower is connected to one end of the three-way connector. A water guide pipe is fixedly connected to the other end of the three-way connector. The end of the water guide pipe is connected to the bottom end of a first three-way valve.

[0007] As a preferred embodiment of this utility model, the water supply mechanism includes a liquid level sensor fixedly installed on the inner wall of the tank and a second water pump fixedly installed on the outer side of the tank. The output end of the second water pump extends into the inner cavity of the tank and is fixedly connected to a water spray network. The bottom surface of the water spray network has multiple water spray holes. The water spray network is located above the filter screen. The input end of the second water pump is fixedly connected to a third three-way valve. One end of the third three-way valve is fixedly connected to a cleaning agent suction pipe, and the other end of the third three-way valve is fixedly connected to a clean water suction pipe.

[0008] As a preferred embodiment of this utility model, the cleaning mechanism includes a servo motor fixedly installed on the bottom surface of the housing. The output shaft of the servo motor extends to the bottom of the inner cavity of the housing and is fixedly connected to a U-shaped frame. A brush is provided on the top surface of the U-shaped frame. The top surface of the brush contacts the bottom surface of the filter screen. The side surface of the U-shaped frame fits against the inner wall of the housing. The bottom surface of the U-shaped frame fits against the bottom surface of the inner cavity of the housing.

[0009] As a preferred embodiment of this utility model, a control panel is fixedly installed on the top surface of the housing. The control panel is electrically connected to the first water pump, the high-pressure blower, the first three-way valve, the second three-way valve, the third three-way valve, the liquid level sensor, the servo motor, and the second water pump.

[0010] As a preferred embodiment of this utility model, a storage battery is provided on the top surface of the housing, and the storage battery is electrically connected to the control panel, the first water pump, the high-pressure blower, the first three-way valve, the second three-way valve, the third three-way valve, the liquid level sensor, the servo motor, and the second water pump.

[0011] As a preferred embodiment of this utility model, the bottom surface of the box is fixedly connected with multiple support legs, and a drain valve is fixedly installed at the bottom of the box.

[0012] As a preferred embodiment of this utility model, a switch valve is fixedly installed at the ends of the hot fluid inlet pipe, the cold fluid outlet pipe, the hot fluid outlet pipe, and the cold fluid inlet pipe.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] (1) In this utility model, when cleaning the inside of the plate heat exchanger, the first water pump is used to extract the cleaning agent from the inner cavity of the tank through the water pumping pipe, and the high-pressure blower is used to fill the inner cavity of the three-way joint with high-pressure gas, so that the gas and the cleaning agent come into contact, and the high-speed water vapor enters the plate heat exchanger. The kinetic energy and impact force of the high-speed water vapor flow are used to completely clean the inner wall of the plate heat exchanger, ensuring the cleaning effect of the plate heat exchanger.

[0015] (2) In this utility model, after cleaning the plate heat exchanger with cleaning agent, the valve connecting the clean water suction pipe and the second water pump on the third three-way valve is opened, and the second water pump is started to pump the external clean water into the inner cavity of the box. The clean water is used to clean the inner cavity of the box, and the clean water and high pressure air are brought into the plate heat exchanger through the first water pump and the high pressure fan, so as to clean the inside of the plate heat exchanger again until the residual cleaning agent is washed away. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the box body of this utility model;

[0018] Figure 3 This is a schematic diagram of the plate heat exchanger of this utility model;

[0019] Figure 4 This is a cross-sectional view of the housing of this utility model;

[0020] Figure 5 This is a schematic diagram of the water spray pipe network of this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Plate heat exchanger; 2. Housing; 3. Cleaning mechanism; 4. Water supply mechanism; 5. Filter screen; 6. Hot fluid inlet pipe; 7. Cold fluid outlet pipe; 8. Hot fluid outlet pipe; 9. Cold fluid inlet pipe; 10. First three-way valve; 11. Second three-way valve; 12. First water pump; 13. Pumping pipe; 14. High-pressure blower; 15. T-joint; 16. Water guide pipe; 17. Return water pipe; 18. Second water pump; 19. Liquid level sensor; 20. Spray pipe network; 21. Spray hole; 22. Third three-way valve; 23. Cleaning agent suction pipe; 24. Clean water suction pipe; 25. Servo motor; 26. U-shaped frame; 27. Brush; 28. Drain valve; 29. ​​Control panel; 30. Battery; 31. Support leg; 32. Switch valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example:

[0027] Please see Figure 1-5A cleaning device for a heat exchange station includes a plate heat exchanger 1 and a housing 2. A cleaning mechanism 3 is installed at the bottom of the housing 2, and a water supply mechanism 4 is installed on the housing 2. The plate heat exchanger 1 has a hot fluid inlet pipe 6, a cold fluid outlet pipe 7, a hot fluid outlet pipe 8, and a cold fluid inlet pipe 9. A first three-way valve 10 is fixedly installed at the bottom of the hot fluid inlet pipe 6 and the cold fluid outlet pipe 7, and a second three-way valve 11 is fixedly installed at the bottom of the hot fluid outlet pipe 8 and the cold fluid inlet pipe 9. The bottom end of the second three-way valve 11 is fixedly connected to... A return water pipe 17 is fixedly sleeved at the bottom of the inner cavity of the box 2. A filter screen 5 is fixedly sleeved in the middle of the inner cavity of the box 2. A first water pump 12 is fixedly installed on the top surface of the box 2. The input end of the first water pump 12 extends into the inner cavity of the box 2 and is fixedly connected to a water suction pipe 13. A three-way connector 15 is fixedly connected to the output end of the first water pump 12. A high-pressure blower 14 is fixedly installed on the top surface of the box 2. The output end of the high-pressure blower 14 is connected to one end of the three-way connector 15. A water guide pipe 16 is fixedly connected to the other end of the three-way connector 15. The end of the water guide pipe 16 is connected to the bottom end of the first three-way valve 10.

[0028] In this embodiment, the plate heat exchanger 1, hot fluid inlet pipe 6, cold fluid outlet pipe 7, hot fluid outlet pipe 8, and cold fluid inlet pipe 9 are common structures of existing plate heat exchangers. Hot fluid inlet pipe 6 and hot fluid outlet pipe 8 are used for hot medium flow, and cold fluid outlet pipe 7 and cold fluid inlet pipe 9 are used for cold medium flow. After heat exchange between hot and cold fluids in the plate heat exchanger 1, the hot fluid outlet pipe 8 discharges the low-temperature fluid, and at this time, the cold fluid outlet pipe 7 discharges the high-temperature fluid after heat exchange.

[0029] For details, please refer to Figure 1 , Figure 4 and Figure 5 The water supply mechanism 4 includes a liquid level sensor 19 fixedly installed on the inner wall of the tank 2 and a second water pump 18 fixedly installed on the outer side of the tank 2. The output end of the second water pump 18 extends into the inner cavity of the tank 2 and is fixedly connected to a water spray network 20. The bottom surface of the water spray network 20 is provided with multiple water spray holes 21. The water spray network 20 is located above the filter screen 5. The input end of the second water pump 18 is fixedly connected to a third three-way valve 22. One end of the third three-way valve 22 is fixedly connected to a cleaning agent suction pipe 23, and the other end of the third three-way valve 22 is fixedly connected to a clean water suction pipe 24.

[0030] In this embodiment, the end of the cleaning agent suction tube 23 is connected to an external cleaning agent storage tank, and the end of the clean water suction tube 24 is connected to an external clean water source.

[0031] For details, please refer to Figure 4The cleaning mechanism 3 includes a servo motor 25 fixedly installed on the bottom surface of the housing 2. The output shaft of the servo motor 25 extends to the bottom of the inner cavity of the housing 2 and is fixedly connected to a U-shaped frame 26. A brush 27 is provided on the top surface of the U-shaped frame 26. The top surface of the brush 27 contacts the bottom surface of the filter screen 5. The side of the U-shaped frame 26 fits against the inner wall of the housing 2, and the bottom surface of the U-shaped frame 26 fits against the bottom surface of the inner cavity of the housing 2.

[0032] In this embodiment, the servo motor 25 drives the loop frame 26 and the brush 27 to rotate. The brush 27 cleans the impurities on the bottom surface of the filter screen 5 to ensure the filtering effect of the filter screen 5. The side of the loop frame 26 scrapes the inner wall of the box 2 to prevent impurities from adhering to the inner wall at the bottom of the inner cavity of the box 2.

[0033] For details, please refer to Figures 1 to 5 A control panel 29 is fixedly installed on the top surface of the housing 2. The control panel 29 is electrically connected to the first water pump 12, the high-pressure blower 14, the first three-way valve 10, the second three-way valve 11, the third three-way valve 22, the liquid level sensor 19, the servo motor 25, and the second water pump 18.

[0034] In this embodiment, the control panel 29 is used to control the first water pump 12, the high-pressure blower 14, the first three-way valve 10, the second three-way valve 11, the third three-way valve 22, the servo motor 25, and the second water pump 18. At the same time, the control panel 29 is used to process the signal detected by the liquid level sensor 19.

[0035] For details, please refer to Figures 1 to 5 The top surface of the housing 2 is equipped with a storage battery 30, which is electrically connected to the control panel 29, the first water pump 12, the high-pressure blower 14, the first three-way valve 10, the second three-way valve 11, the third three-way valve 22, the liquid level sensor 19, the servo motor 25, and the second water pump 18.

[0036] In this embodiment, the storage battery 30 is used to power the control panel 29, the first water pump 12, the high-pressure fan 14, the first three-way valve 10, the second three-way valve 11, the third three-way valve 22, the liquid level sensor 19, the servo motor 25, and the second water pump 18. The first three-way valve 10, the second three-way valve 11, and the third three-way valve 22 are all electrically controlled valves.

[0037] For details, please refer to Figure 1 Multiple support legs 31 are fixedly connected to the bottom surface of the box 2, and a drain valve 28 is fixedly installed at the bottom of the box 2.

[0038] In this embodiment, multiple support legs 31 are used to support the tank 2, and the wastewater in the tank 2 is discharged using the drain valve 28.

[0039] For details, please refer to Figure 3 A switch valve 32 is fixedly installed at the ends of the hot fluid inlet pipe 6, the cold fluid outlet pipe 7, the hot fluid outlet pipe 8, and the cold fluid inlet pipe 9.

[0040] In this embodiment, the ends of the switching valve 32 are connected to the hot water pipes, and the switching valve 32 is in the closed state when cleaning the plate heat exchanger 1.

[0041] Working principle: In use, firstly, control the third three-way valve 22 to connect the input end of the second water pump 18 with the cleaning agent suction pipe 23. Start the second water pump 18 to draw the external cleaning agent into the inner cavity of the spray pipe network 20, and let the cleaning agent be added into the inner cavity of the tank 2 from the spray hole 21 until the water level of the cleaning agent is detected by the liquid level sensor 19. At this time, the bottom end of the suction pipe 13 is below the top surface of the cleaning agent. At the same time, close multiple switch valves 32, open the second three-way valve 11 and the first three-way valve 10, and then start the first water pump 12 to generate suction in the suction pipe 13. Use the suction of the suction pipe 13 to draw the cleaning agent into the inner cavity of the tank 2. The cleaning agent inside the three-way connector 15 is introduced into the inner cavity of the plate heat exchanger 1 through the water pipe 16, the first three-way valve 10, the hot fluid inlet pipe 6, and the cold fluid outlet pipe 7. Meanwhile, the high-pressure blower 14 is activated to inject high-pressure air into the three-way connector 15, causing the air to mix with the cleaning agent in the three-way connector 15 and the water pipe 16. The kinetic energy and impact force of the high-speed water-air flow completely clean the inner wall of the plate heat exchanger 1. The resulting wastewater flows back into the inner cavity of the housing 2 through the hot fluid outlet pipe 8, the cold fluid inlet pipe 9, the second three-way valve 11, and the return water pipe 17, where it is filtered by the inner cavity of the housing 2. The filter screen 5 filters impurities in the wastewater, ensuring the cleaning agent can be recycled. Additionally, when the cleaning agent is extracted from the plate heat exchanger 1 through the pump pipe 13, the cleaning agent inside the chamber 2 will not be detected by the level sensor 19. At this time, the second pump 18, the third three-way valve 22, the cleaning agent suction pipe 23, the spray pipe network 20, and the spray nozzles 21 work together to replenish the cleaning agent in the chamber 2. After cleaning with the cleaning agent, the drain valve 28 is opened to discharge the wastewater from the chamber 2. Simultaneously, the servo motor 25 is started to rotate the loop frame 26 and the brush 27, using the brush 27 to clean the impurities filtered from the bottom surface of the filter screen 5. For cleaning, use the side of the U-shaped frame 26 to scrape the inner wall of the box 2 to ensure that impurities can be completely discharged. Finally, close the valve connecting the cleaning agent suction pipe 23 on the third three-way valve 22 to the second water pump 18, and open the valve connecting the clean water suction pipe 24 on the third three-way valve 22 to the second water pump 18. Start the second water pump 18 to pump external clean water into the inner cavity of the box 2 and use the clean water to clean the inner cavity of the box 2. In addition, clean water and high-pressure air are introduced into the plate heat exchanger 1 through the first water pump 12 and the high-pressure blower 14 to clean the inside of the plate heat exchanger 1 again until the residual cleaning agent is washed away.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A cleaning device for heat exchanger stations, comprising a plate heat exchanger (1) and a tank (2), characterized in that: A cleaning mechanism (3) is provided at the bottom of the box (2), a water supply mechanism (4) is provided on the box (2), a hot fluid inlet pipe (6) is provided on the plate heat exchanger (1), a cold fluid outlet pipe (7) is provided on the plate heat exchanger (1), a hot fluid outlet pipe (8) is provided on the plate heat exchanger (1), a cold fluid inlet pipe (9) is provided on the plate heat exchanger (1), a first three-way valve (10) is fixedly installed at the bottom of the hot fluid inlet pipe (6) and the cold fluid outlet pipe (7), a second three-way valve (11) is fixedly installed at the bottom of the hot fluid outlet pipe (8) and the cold fluid inlet pipe (9), and a return water pipe (17) is fixedly connected to the bottom end of the second three-way valve (11). 17) is fixedly sleeved to the bottom of the inner cavity of the box (2). A filter screen (5) is fixedly sleeved in the middle of the inner cavity of the box (2). A first water pump (12) is fixedly installed on the top surface of the box (2). The input end of the first water pump (12) extends into the inner cavity of the box (2) and is fixedly connected to a water pumping pipe (13). A three-way connector (15) is fixedly connected to the output end of the first water pump (12). A high-pressure blower (14) is fixedly installed on the top surface of the box (2). The output end of the high-pressure blower (14) is connected to one end of the three-way connector (15). A water guide pipe (16) is fixedly connected to the other end of the three-way connector (15). The end of the water guide pipe (16) is connected to the bottom end of the first three-way valve (10).

2. The cleaning device for a heat exchange station according to claim 1, characterized in that: The water supply mechanism (4) includes a liquid level sensor (19) fixedly installed on the inner wall of the tank (2) and a second water pump (18) fixedly installed on the outer side of the tank (2). The output end of the second water pump (18) extends into the inner cavity of the tank (2) and is fixedly connected to a water spray network (20). The bottom surface of the water spray network (20) is provided with multiple water spray holes (21). The water spray network (20) is located above the filter screen (5). The input end of the second water pump (18) is fixedly connected to a third three-way valve (22). One end of the third three-way valve (22) is fixedly connected to a cleaning agent suction pipe (23), and the other end of the third three-way valve (22) is fixedly connected to a clean water suction pipe (24).

3. The cleaning device for a heat exchange station according to claim 2, characterized in that: The cleaning mechanism (3) includes a servo motor (25) fixedly installed on the bottom surface of the housing (2). The output shaft of the servo motor (25) extends to the bottom of the inner cavity of the housing (2) and is fixedly connected to a U-shaped frame (26). A brush (27) is provided on the top surface of the U-shaped frame (26). The top surface of the brush (27) is in contact with the bottom surface of the filter screen (5). The side surface of the U-shaped frame (26) is in contact with the inner wall of the housing (2). The bottom surface of the U-shaped frame (26) is in contact with the bottom surface of the inner cavity of the housing (2).

4. The cleaning device for a heat exchange station according to claim 3, characterized in that: The top surface of the box body (2) is fixedly provided with a control panel (29), and the control panel (29) is electrically connected with the first water pump (12), the high-pressure fan (14), the first three-way valve (10), the second three-way valve (11), the third three-way valve (22), the liquid level sensor (19), the servo motor (25) and the second water pump (18) respectively.

5. The cleaning device for a heat exchange station according to claim 4, characterized in that: The top surface of the box body (2) is provided with a storage battery (30), and the storage battery (30) is electrically connected with the control panel (29), the first water pump (12), the high-pressure fan (14), the first three-way valve (10), the second three-way valve (11), the third three-way valve (22), the liquid level sensor (19), the servo motor (25) and the second water pump (18) respectively.

6. The cleaning device for a heat exchange station according to claim 1, characterized in that: The bottom surface of the box body (2) is fixedly connected with a plurality of supporting legs (31), and the bottom of the box body (2) is fixedly provided with a liquid discharge valve (28).

7. The cleaning device for a heat exchange station according to claim 1, characterized in that: The end of the hot fluid inlet pipe (6), the cold fluid outlet pipe (7), the hot fluid outlet pipe (8) and the cold fluid inlet pipe (9) is fixedly provided with a switch valve (32).

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