Anti-fouling surface treatment device for ground source heat pump heat exchangers

Abstract

The utility model discloses a ground source heat pump heat exchanger anti -incrustation surface treatment device belongs to ground source heat pump heat exchanger field, two end covers are respectively installed with first connecting pipe, second connecting pipe, and the second connecting pipe is connected with first control valve, and the outer end of first control valve is connected with the connecting pipe, and the lateral wall of connecting pipe is equipped with the branch pipe, and the upper end of branch pipe is connected with manual valve. The surface treatment liquid liquid supplementing tank stores and supplements chemical substances, and removes the surface treatment liquid to the surface of heat exchanger and guarantees the efficient operation of equipment. Manual valve controls the flow rate, adjusts the liquid supplementing tank and the connecting pipe intercommunication state, and ensures the surface treatment liquid supply according to the demand. The flushing equipment is transported to the heat exchanger inside through the pump body and effectively cleans the inside surface of equipment, prevents the formation of incrustation, and guarantees the cleanliness and operating efficiency of equipment. Flowmeter instrument monitoring and control ensure the accurate liquid flow, and improve the cleaning effect. The flushing equipment and liquid supplementing tank cooperate and simplify the maintenance and cleaning process.

Description

Technical Field

[0001] This utility model relates to the field of ground source heat pump heat exchangers, and in particular to a surface treatment device for preventing scaling in ground source heat pump heat exchangers. Background Technology

[0002] The ground source heat pump heat exchanger is the core component of a ground source heat pump system. It utilizes the principles of thermodynamic circulation and the constant temperature characteristics of underground soil or water sources to provide buildings with an energy-efficient heating and cooling solution. This heat exchanger primarily exchanges heat with the soil or groundwater through heat exchange pipes buried underground. In winter, it absorbs heat from the ground, raises its temperature through the heat pump unit, and then delivers it indoors for heating; in summer, it releases heat from the indoor environment back underground for cooling. This efficient operating mode relies on the stable temperature characteristics of the underground soil or water source, enabling the ground source heat pump to maintain excellent performance under various climatic conditions.

[0003] In the actual use and maintenance of tubular heat exchangers, the resistance of the internal pipes is distributed within the large-sized shell and tubes, and the accumulation of leaked liquid within the shell and tubes is a challenging problem. Due to the limited space and complex structure inside the shell and tubes, once leakage occurs, the leaked liquid is difficult to detect and drain in a timely manner. This accumulated liquid can not only corrode the shell and tubes but also adversely affect the overall performance and safety of the heat exchanger. Furthermore, the process of disassembling and cleaning the accumulated liquid inside large shell and tubes is complex and time-consuming, often leading to unnecessary production downtime and increased maintenance costs.

[0004] Furthermore, as fluid flows through pipes, impurities easily accumulate and form scale. This scale adheres to the inner wall of the pipe, gradually thickening and affecting heat exchange efficiency. Over time, the scale can reduce the pipe's inner diameter, decrease flow rate, and in severe cases, even cause blockages. In addition, uneven scale coverage can lead to uneven heating of the pipes, resulting in safety hazards such as pipe bursts. Cleaning scale from pipes is extremely difficult due to the densely packed pipe arrays and limited internal space. This not only increases the workload for maintenance personnel but also risks damaging the pipes or pipe shells due to improper operation. Utility Model Content

[0005] The main purpose of this invention is to provide a surface treatment device for preventing scaling in ground source heat pump heat exchangers, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A surface treatment device for preventing scaling in a ground source heat pump heat exchanger includes an outer shell of the heat exchanger, end caps, and inner pipes of the heat exchanger. Multiple inner pipes of the heat exchanger are installed inside the outer shell of the heat exchanger, and end caps are installed at the ports of the outer shell of the heat exchanger. The two end caps are respectively equipped with a first connecting pipe and a second connecting pipe. A first control valve is connected to the second connecting pipe. A connecting pipe is connected to the outer end of the first control valve. A secondary pipe is provided on the side wall of the connecting pipe. A manual valve is connected to the upper end of the secondary pipe. A surface treatment liquid replenishment tank is connected to the upper end of the manual valve. The surface treatment liquid is introduced into the outer shell of the heat exchanger to achieve surface treatment of scale on the surface of the outer shell of the heat exchanger and the inner pipe of the heat exchanger. The liquid is then discharged through the connecting pipe. The outer end of the connecting pipe is connected to the pump body, and the zero and one ports of the pump body are connected to the connecting pipe. The upper end of the connecting pipe is connected to the liquid inlet pipe through the second control valve. The cleaning liquid is input through the liquid inlet pipe and then pumped into the outer shell of the heat exchanger through the pump body to clean the internal surface of the equipment and prevent scaling.

[0007] Optionally, an instrument, which is a flow meter, is connected to the side wall of the connecting pipe. The instrument and the connecting pipe are connected by a thread, and the connection is provided with multiple sealing rings. Optionally, the connecting pipe, the first control valve, the pump body, the connecting pipe, the second control valve, and the inlet pipe are connected by connecting flanges, bolts, and nuts, and a sealing ring is provided at the connection. The connecting pipe and the second connecting pipe are connected by connecting flanges, and a sealing ring is provided at the connection. Optionally, the secondary pipe and the connecting pipe are designed as a single unit. The end pipe of the manual valve is inserted into the secondary pipe and communicates with the connecting pipe. The end pipe of the manual valve and the secondary pipe are threaded together, and the connection is provided with multiple layers of sealing rings. The manual valve and the surface treatment liquid replenishment tank are threaded together, and the connection is provided with multiple layers of sealing rings. Optionally, the surface treatment liquid replenishment tank is a soft replenishment tank, and the manual valve is a ball valve. The flow rate of the surface treatment liquid in the surface treatment liquid replenishment tank is controlled by the manual valve, and the connection between the surface treatment liquid replenishment tank and the connecting pipe is controlled. Optionally, the first control valve and the second control valve are butterfly valves, which are used to open and close the pipe connection. Optionally, the surface treatment liquid stored in the surface treatment liquid replenishment tank is any one of the following: formic acid-based cleaning liquid, water heat exchanger descaling agent KD-L411, circulating water scale inhibitor and corrosion inhibitor JM660, TNB plate heat exchanger descaling agent TNB-HRQ008, and polyphosphate buffer.

[0008] Compared with the prior art, the present invention has the following beneficial effects: The surface treatment fluid replenishment tank can store and replenish a variety of different chemical substances. These substances, acting as surface treatment fluids, effectively remove scale from the surface of heat exchangers, thus ensuring the efficient operation of the equipment. The flow rate of the surface treatment fluid can be controlled by a manual valve, allowing for flexible adjustment of the connection between the replenishment tank and the connecting pipe, ensuring that the surface treatment fluid is supplied as needed.

[0009] The rinsing equipment uses a pump to deliver cleaning fluid into the heat exchanger, effectively cleaning the internal surfaces of the equipment. This not only further prevents scale formation but also ensures the cleanliness and operational efficiency of the equipment. Simultaneously, the monitoring and control of the flow meter ensures accurate flow rate of the liquid, thereby improving the cleaning effect.

[0010] The synergistic effect of the rinsing equipment and replenishment tank simplifies the equipment maintenance and cleaning process. Operators can easily control the delivery and discharge of surface treatment and cleaning solutions via valves and pumps, saving time and labor costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a diagram showing the overall structure of the present invention; Figure 3 This is a diagram showing the internal pipes and cleaning mechanism of the heat exchanger of this utility model. Figure 4 This is a schematic diagram of the cleaning and processing mechanism of this utility model; Figure 5 This is a diagram illustrating the cleaning and processing mechanism of this utility model.

[0012] In the diagram: 1. Heat exchanger outer shell; 2. End cap; 3. Heat exchanger inner pipe; 4. First connecting pipe; 5. Second connecting pipe; 6. First control valve; 7. Connecting pipe; 8. Secondary pipe; 9. Manual valve; 10. Surface treatment liquid replenishment tank; 11. Pump body; 12. Connecting pipe; 13. Instrument; 14. Liquid inlet pipe; 15. Second control valve. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0014] like Figure 1 - Figure 5 As shown, the anti-scaling surface treatment device for a ground source heat pump heat exchanger mainly consists of an outer shell 1, an end cap 2, and internal pipes 3. Inside the outer shell 1, multiple internal pipes 3 are installed in an orderly manner, while the end cap 2 is tightly installed at the port of the outer shell 1, ensuring the sealing of the device and the integrity of the overall structure.

[0015] A first connecting pipe 4 and a second connecting pipe 5 are respectively installed on the two end caps 2. A first control valve 6 is connected to the second connecting pipe 5, and a connecting pipe 7 is connected to the outer end of the control valve. A secondary pipe 8 is designed on the side wall of the connecting pipe 7, and a manual valve 9 is connected to the upper end of the secondary pipe 8. The upper end of the manual valve 9 is connected to a surface treatment liquid replenishment tank 10. Through this series of devices, the surface treatment liquid can be effectively delivered to the outer shell 1 of the heat exchanger, thereby achieving surface treatment of scale on the surface of the outer shell 1 and the inner pipes 3 of the heat exchanger. After treatment, the treatment liquid can be discharged through the corresponding connecting pipe.

[0016] The outer end of the connecting pipe 7 is also connected to the pump body 11, and the other end of the pump body 11 is connected to the connecting pipe 12. The upper end of the connecting pipe 12 is connected to the inlet pipe 14 through the second control valve 15, through which cleaning fluid can be introduced. The function of the pump body 11 is to deliver the cleaning fluid to the outer shell 1 of the heat exchanger, thereby cleaning the internal surface of the equipment and effectively preventing scaling.

[0017] An instrument 13, a flow meter, is connected to the side wall of the connecting pipe 12. This instrument 13 is used to monitor and control the flow rate of the liquid flowing through it. The instrument 13 is connected to the connecting pipe 12 by threads, and multiple sealing rings are provided at the connection to ensure sealing and measurement accuracy.

[0018] The connecting pipe 7, the first control valve 6, the pump body 11, the connecting pipe 12, the second control valve 15, and the inlet pipe 14 are connected by connecting flanges, bolts, and nuts. Sealing rings are provided at the connections to ensure tightness and prevent liquid leakage. The connecting pipe 7 is connected to the second connecting pipe 5 by a connecting flange, and a sealing ring is also provided at the connection to ensure reliability.

[0019] The secondary pipe 8 and the connecting pipe 7 are integrated into one unit. The end of the manual valve 9 is inserted into the secondary pipe 8 and connected to the connecting pipe 7. The end of the manual valve 9 and the secondary pipe 8 are connected by threads, and multiple sealing rings are provided at the connection to ensure a tight connection and prevent liquid leakage. The manual valve 9 is also connected to the surface treatment liquid replenishment tank 10 by threads, and multiple sealing rings are provided at the connection to ensure the reliability of the connection.

[0020] The surface treatment solution replenishment tank 10 is a soft-fill tank, which is convenient for storing and replenishing the surface treatment solution. The manual valve 9 is a ball valve, which can be manually operated to control the flow rate of the surface treatment solution in the surface treatment solution replenishment tank 10, thereby adjusting the connection between the surface treatment solution replenishment tank 10 and the connecting pipe 7.

[0021] The first control valve 6 and the second control valve 15 are butterfly valves. This design allows for easy opening and closing of pipe connections, thus facilitating the control of liquid flow.

[0022] The surface treatment fluid stored in the surface treatment fluid replenishment tank 10 can be a variety of different chemical substances, including but not limited to formic acid-based cleaning fluid, KD-L411 descaling agent for water heat exchangers, JM660 scale and corrosion inhibitor for circulating water, TNB-HRQ008 descaling agent for TNB plate heat exchangers, and polyphosphate buffers. The concentration of these treatment agents needs to be controlled, as these substances can effectively remove scale from the surface of the heat exchanger and ensure efficient equipment operation.

[0023] Select a suitable surface treatment solution as needed, such as formic acid-based cleaning solution, KD-L411 descaling agent for water heat exchangers, JM660 scale and corrosion inhibitor for circulating water, TNB-HRQ008 descaling agent for TNB plate heat exchangers, polyphosphate buffers, etc. Ensure the concentration of the surface treatment solution meets the requirements to effectively remove scale from the heat exchanger surface. Ensure all connecting flanges, bolts, and nuts are tightly connected and the sealing rings are intact to prevent liquid leakage. Ensure the first connecting pipe 4 and the second connecting pipe 5 are correctly installed on the end cover 2, and that the first control valve 6 and the second control valve 15 are in the closed position.

[0024] Open manual valve 9 to allow the surface treatment solution to flow from the surface treatment solution replenishment tank 10 into the connecting pipe 7. The surface treatment solution is then delivered to the heat exchanger outer shell 1 via the first control valve 6 and the connecting pipe 7. Ensure the surface treatment solution evenly covers the surface of the heat exchanger outer shell 1 and the inner pipes 3. Maintain the surface treatment solution within the heat exchanger for a certain period to ensure effective scale removal. Adjust the treatment time as needed to achieve the best treatment results.

[0025] After treatment, open the second control valve 15 to discharge the treatment liquid through the connecting pipe 12 and pump body 11. Ensure all treatment liquid is completely discharged to avoid residue. Introduce cleaning liquid through the inlet pipe 14, ensuring it is delivered to the heat exchanger outer shell 1 via pump body 11. Use instrument 13 (flow meter) to monitor and control the flow rate of the liquid to ensure cleaning effectiveness. After cleaning, open the second control valve 15 again to discharge the cleaning liquid. Ensure all cleaning liquid is completely discharged to avoid residue. Check that all connections are properly sealed and leak-free. Regularly inspect and maintain the equipment to ensure its normal operation.

[0026] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A surface treatment device for preventing scaling in a ground source heat pump heat exchanger, comprising an outer shell (1), an end cap (2), and inner pipes (3), wherein multiple inner pipes (3) are installed inside the outer shell (1), and the end caps (2) are installed at the ports of the outer shell (1), characterized in that: The two end caps (2) are respectively equipped with a first connecting pipe (4) and a second connecting pipe (5). The second connecting pipe (5) is connected to a first control valve (6). The outer end of the first control valve (6) is connected to a connecting pipe (7). The side wall of the connecting pipe (7) is provided with a secondary pipe (8). The upper end of the secondary pipe (8) is connected to a manual valve (9). The upper end of the manual valve (9) is connected to a surface treatment liquid replenishment tank (10). The surface treatment liquid is input into the outer shell (1) of the heat exchanger to achieve surface treatment of scale on the surface of the outer shell (1) of the heat exchanger and the inner pipe (3) of the heat exchanger, and then discharged through the connecting pipe. The outer end of the connecting pipe (7) is connected to the pump body (11), and the zero and one ports of the pump body (11) are connected to the connecting pipe (12). The upper end of the connecting pipe (12) is connected to the liquid inlet pipe (14) through the second control valve (15). The cleaning liquid is input through the liquid inlet pipe (14) and then input into the outer shell (1) of the heat exchanger through the pump body (11) to achieve the cleaning of the internal surface of the equipment to prevent scaling.

2. The anti-scaling surface treatment device for a ground source heat pump heat exchanger according to claim 1, characterized in that: The side wall of the connecting pipe (12) is connected to an instrument (13), which is a flow meter. The instrument (13) and the connecting pipe (12) are connected by a thread, and the connection is provided with multiple layers of sealing rings.

3. The anti-scaling surface treatment device for a ground source heat pump heat exchanger according to claim 2, characterized in that: The connecting pipe (7), the first control valve (6), the pump body (11), the connecting pipe (12), the second control valve (15) and the liquid inlet pipe (14) are connected by connecting flanges, bolts and nuts, and a sealing ring is provided at the connection. The connecting pipe (7) and the second connecting pipe (5) are connected by connecting flanges, and a sealing ring is provided at the connection.

4. The anti-scaling surface treatment device for a ground source heat pump heat exchanger according to claim 3, characterized in that: The secondary pipe (8) and the connecting pipe (7) are designed as a single unit. The end pipe of the manual valve (9) is inserted into the secondary pipe (8) and connected to the connecting pipe (7). The end pipe of the manual valve (9) and the secondary pipe (8) are threaded together, and the connection is provided with multiple layers of sealing rings. The manual valve (9) and the surface treatment liquid replenishment tank (10) are threaded together, and the connection is provided with multiple layers of sealing rings.

5. The anti-scaling surface treatment device for a ground source heat pump heat exchanger according to claim 4, characterized in that: The surface treatment liquid replenishment tank (10) is a soft replenishment tank, and the manual valve (9) is a ball valve. The flow rate of the surface treatment liquid in the surface treatment liquid replenishment tank (10) is controlled by the manual valve (9), and the connection between the surface treatment liquid replenishment tank (10) and the connecting pipe (7) is controlled.

6. The anti-scaling surface treatment device for a ground source heat pump heat exchanger according to claim 5, characterized in that: The first control valve (6) and the second control valve (15) are butterfly valves, which are used to open and close the pipe connection.

7. The anti-scaling surface treatment device for a ground source heat pump heat exchanger according to claim 6, characterized in that: The surface treatment liquid stored in the surface treatment liquid replenishment tank (10) is any one of the following: formic acid-based cleaning liquid, water heat exchanger descaling agent KD-L411, circulating water scale inhibitor and corrosion inhibitor JM660, TNB plate heat exchanger descaling agent TNB-HRQ008, and polyphosphate buffer.

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