Performance test system for raw sewage heat exchanger

Abstract

The utility model relates to the technical field of renewable energy utilization, and provides a raw sewage heat exchanger performance test system, which comprises a sewage main canal, a sewage heat exchanger, a heat pump unit, an intermediate water main canal and a buffer water tank, the sewage heat exchanger is connected with the heat pump unit through an intermediate water circulation pipeline, the heat pump unit is connected with the buffer water tank through a user side water circulation pipeline, and the heat pump unit and the buffer water tank are further connected with the intermediate water trunk canal through pipelines. The sewage circulation pipeline, the intermediate water circulation pipeline and the user side water circulation pipeline are each provided with a monitoring assembly. Through the structural arrangement, the influence rule of suspended solids, microorganisms and the like in sewage on the performance of the sewage heat exchanger can be really reflected, and the real reliability of performance test data of the sewage heat exchanger is improved.

Description

Technical Field

[0001] This utility model relates to the field of renewable energy utilization technology, and more specifically, to a performance testing system for a raw wastewater heat exchanger. Background Technology

[0002] Urban sewage contains abundant residual heat energy. By utilizing the sewage's properties of being warm in winter and cool in summer (9-16℃ in winter and 22-28℃ in summer), heat can be extracted or released through heat pumps to provide heating, cooling, and domestic hot water for buildings. This can replace traditional fossil fuel heating and has significant carbon emission reduction benefits.

[0003] One of the core components of a wastewater source heat pump system is the wastewater heat exchanger. A wastewater heat exchanger performance testing system is a crucial step in promoting the implementation of wastewater waste heat utilization technology. However, existing wastewater heat exchanger tests often use clean water to simulate wastewater conditions and involve building complex testing systems in laboratories or at the user's location. This fails to accurately reflect the impact of suspended solids and microorganisms in wastewater on heat exchanger performance, leading to deviations in practical applications. Consequently, these systems cannot provide reliable test data for the commissioning of wastewater energy utilization projects. Furthermore, existing testing systems are structurally complex and have high operation and maintenance costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to improve the authenticity and reliability of performance test data of sewage heat exchangers.

[0005] This utility model provides a performance testing system for a primary wastewater heat exchanger, comprising a wastewater trunk line, a wastewater heat exchanger, a heat pump unit, an intermediate water trunk line, and a buffer tank. The wastewater trunk line is connected to the wastewater heat exchanger via a wastewater circulation pipeline. The wastewater heat exchanger is connected to the heat pump unit via an intermediate water circulation pipeline. The heat pump unit is connected to the buffer tank via a user-side water circulation pipeline. The heat pump unit and the buffer tank are also connected to the intermediate water trunk line via pipelines. Monitoring components are respectively installed on the wastewater circulation pipeline, the intermediate water circulation pipeline, and the user-side water circulation pipeline.

[0006] Optionally, the monitoring components include flow monitoring devices and temperature monitoring devices.

[0007] Optionally, the temperature monitoring device is installed on the inlet and return pipes of the sewage circulation pipeline, the inlet and return pipes of the intermediate water circulation pipeline, and the inlet and return pipes of the user-side water circulation pipeline.

[0008] Optionally, a first valve body is provided on the user-side water circulation pipeline between the outlet of the heat pump unit and the inlet of the buffer water tank, and a second valve body is provided on the pipeline between the outlet of the heat pump unit and the intermediate water trunk line.

[0009] Optionally, a first user-side flow monitoring device is installed on the user-side water circulation pipeline between the outlet of the heat pump unit and the inlet of the buffer water tank, and a second user-side flow monitoring device is installed on the pipeline between the outlet of the heat pump unit and the intermediate water trunk line.

[0010] Optionally, an intermediate water flow monitoring device and an intermediate water temperature monitoring device are installed on the pipeline between the intermediate water main channel and the inlet of the buffer water tank.

[0011] Optionally, an intermediate water intake pump is provided at the water intake end of the pipeline between the intermediate water trunk line and the inlet of the buffer water tank. The intermediate water intake pump is located inside the intermediate water trunk line, and the intermediate water discharge end of the pipeline between the outlet of the heat pump unit and the intermediate water trunk line is located inside the intermediate water trunk line.

[0012] Optionally, a user-side water circulation pump is installed on the user-side water circulation pipeline.

[0013] Optionally, an intermediate water circulation pump is installed on the intermediate water circulation pipeline.

[0014] Optionally, a sewage intake pump is provided at the intake end of the sewage circulation pipeline between the sewage trunk line and the inlet of the sewage heat exchanger. The sewage intake pump is located inside the sewage trunk line, and the sewage discharge end of the sewage circulation pipeline between the outlet of the sewage heat exchanger and the sewage trunk line is located inside the sewage trunk line.

[0015] Compared with the prior art, the raw wastewater heat exchanger performance testing system provided by this utility model has the following technical effects:

[0016] The raw wastewater heat exchanger performance testing system provided by this utility model can be applied to the performance testing of wastewater heat exchangers. By setting up a wastewater trunk line, which can be directly located at, for example, a wastewater treatment plant or a domestic sewage collection point, raw wastewater is directly used as the heat source or cold source for the wastewater heat exchanger to conduct performance testing. A heat pump unit, a buffer tank, and an intermediate water trunk line are set up, and the wastewater heat exchanger and heat pump unit are connected through an intermediate water circulation pipeline. A user-side water circulation pipeline connects the heat pump unit and the buffer tank. The intermediate water trunk line provides intermediate water to the buffer tank, intermediate water circulation pipeline, and user-side water circulation pipeline. The heat pump unit can absorb or release heat through the wastewater heat exchanger, while simultaneously providing simulated user-side heating or cooling operations to the user-side water circulation pipeline and buffer tank, thus simulating the actual working conditions of wastewater energy utilization. Furthermore, by setting up monitoring components on the wastewater circulation pipeline, intermediate water circulation pipeline, and user-side water circulation pipeline, the monitoring components can monitor data such as flow rate and temperature, and the performance analysis and testing of the wastewater heat exchanger can be performed through data comparison. Through the above structural setup, not only can raw sewage be used as the heat or cold source for testing the performance of sewage heat exchangers, but the performance of sewage heat exchangers, including their clogging tolerance, long-term operational stability, and energy efficiency indicators, can also be evaluated. This system can accurately reflect the impact of suspended solids and microorganisms in sewage on the performance of sewage heat exchangers. Moreover, the system can be built within sewage treatment plants or near the domestic sewage end to form a sewage operating condition testing platform for the equipment. It is flexible in layout and simple in system design. At the same time, by simulating the actual heating or cooling conditions on the user side through heat pump units, buffer tanks, intermediate water channels, and circulation pipelines, a complete testing system can be formed without the need for remote users, thus improving the authenticity and reliability of sewage heat exchanger performance test data. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the composition and working principle of the raw wastewater heat exchanger performance testing system according to an embodiment of this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 10-Sewage trunk line, 11-Sewage intake pump, 12-Sewage discharge end, 13-Sewage circulation pipeline, 14-Sewage side flow monitoring device, 15-Sewage side temperature monitoring device, 20-Sewage heat exchanger, 21-Intermediate water circulation temperature monitoring device, 22-Intermediate water circulation flow monitoring device, 23-Intermediate water circulation pump, 30-Heat pump unit, 31-Expansion valve, 32-Evaporator, 33-Compressor, 34-Condenser, 40-Intermediate water trunk line, 41-User side temperature monitoring device, 42-User side circulating water pump, 43-First valve body, 44-First user side flow monitoring device, 45-Second user side flow monitoring device, 46-Second valve body, 47-Intermediate water discharge end, 50-Buffer tank, 51-Intermediate water intake pump, 52-Intermediate water flow monitoring device, 53-Intermediate water temperature monitoring device. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in sequences other than those illustrated or described herein.

[0022] In the description of this utility model, the orientation or positional relationship indicated by terms such as "up", "down", "left", "right", "top", "bottom", "front", "back", "inner" and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and is not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0024] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or illustrative embodiment of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0025] To solve the above technical problems, such as Figure 1 As shown in the figure, this utility model embodiment provides a raw sewage heat exchanger performance testing system, including a sewage trunk line 10, a sewage heat exchanger 20, a heat pump unit 30, an intermediate water trunk line 40, and a buffer tank 50. The sewage trunk line 10 is connected to the sewage heat exchanger 20 through a sewage circulation pipeline 13. The sewage heat exchanger 20 is connected to the heat pump unit 30 through an intermediate water circulation pipeline. The heat pump unit 30 is connected to the buffer tank 50 through a user-side water circulation pipeline. The heat pump unit 30 and the buffer tank 50 are also connected to the intermediate water trunk line 40 through pipelines. Monitoring components are respectively installed on the sewage circulation pipeline 13, the intermediate water circulation pipeline, and the user-side water circulation pipeline.

[0026] It should be noted that the sewage trunk line 10 can be located near a sewage treatment plant or domestic sewage source, connected to the sewage source, or it can directly serve as a sewage storage device for a sewage treatment plant or domestic sewage source. It directly uses raw sewage as the heat and cold source for performance testing of the sewage heat exchanger 20, enabling the evaluation of performance indicators such as the heat exchanger's clogging tolerance, long-term operational stability, and energy efficiency, accurately reflecting the impact of suspended solids and microorganisms in the sewage on the heat exchanger's performance. Simultaneously, the intermediate water trunk line 40 stores intermediate water, such as clean water, required by the system, to simulate user-end water usage. Monitoring components can include parameter monitoring devices such as temperature and flow rate monitors. Comparative analysis of the data displayed by these monitoring components can reflect the performance indicators of the sewage heat exchanger. The sewage circulation pipeline 13 is used to circulate sewage between the sewage trunk 10 and the sewage heat exchanger 20. The intermediate water circulation pipeline is used to circulate intermediate water between the sewage heat exchanger 20 and the heat pump unit 30. The user-side water circulation pipeline is used to circulate user-side water between the heat pump unit 30 and the buffer tank 50. Therefore, the sewage circulation pipeline 13, the intermediate water circulation pipeline, and the user-side water circulation pipeline all include two sections: one for water supply and the other for water return. The sewage heat exchanger 20 is used to achieve heat exchange between sewage and intermediate water. The heat pump unit 30 includes an expansion valve 31, an evaporator 32, a compressor 33, and a condenser 34. It absorbs or releases heat from the sewage heat exchanger 20 end through the intermediate water circulation pipeline and heats or cools the user side, i.e., the buffer tank 50, through the user-side water circulation pipeline. This establishes a complete test platform that truly reflects the impact of raw sewage on the performance of the sewage heat exchanger 20, improving the authenticity and reliability of the performance test data of the sewage heat exchanger 20.

[0027] In this embodiment, the raw wastewater heat exchanger performance testing system provided can be applied to the performance testing of the wastewater heat exchanger 20. By setting up a wastewater trunk line 10, which can be directly installed in, for example, a wastewater treatment plant or a domestic sewage collection point, raw wastewater is directly used as the heat source or cold source for the wastewater heat exchanger 20 for performance testing. The system connects the wastewater heat exchanger 20 and the heat pump unit 30 through a heat pump unit 30, a buffer tank 50, and an intermediate water trunk line 40, as well as through an intermediate water circulation pipeline. A user-side water circulation pipeline connects the heat pump unit 30 and the buffer tank 50. Next, the intermediate water channel 40 can provide intermediate water for the buffer water tank 50, the intermediate water circulation pipeline, and the user-side water circulation pipeline. The heat pump unit 30 can absorb or release heat through the sewage heat exchanger 20, and at the same time provide simulated user-side heating or cooling operations for the user-side water circulation pipeline and the buffer water tank 50, which simulates the actual working conditions of sewage energy utilization. Furthermore, by setting monitoring components on the sewage circulation pipeline 13, the intermediate water circulation pipeline, and the user-side water circulation pipeline, the monitoring components can monitor data such as flow rate and temperature, and the performance analysis and testing of the sewage heat exchanger 20 can be carried out through data comparison. Through the above structural setup, not only can raw sewage be used as the heat source or cold source for performance testing of the sewage heat exchanger 20, but also the performance of the sewage heat exchanger 20, including its clogging tolerance, long-term operational stability, and energy efficiency indicators, can be evaluated. This can truly reflect the influence of suspended solids and microorganisms in sewage on the performance of the sewage heat exchanger 20. Moreover, the system can be built in sewage treatment plants or near the domestic sewage end to form a sewage operating condition testing platform for the equipment. The layout is flexible and the system is simple. At the same time, the actual operating conditions of heating or cooling on the user side can be simulated through the heat pump unit 30, buffer water tank 50, intermediate water trunk 40, and circulation pipeline. A complete testing system can be formed without the need for remote users, which improves the authenticity and reliability of the performance test data of the sewage heat exchanger 20.

[0028] Optionally, such as Figure 1 As shown, the monitoring components include a flow monitoring device and a temperature monitoring device.

[0029] Specifically, the flow monitoring devices include a sewage-side flow monitoring device 14, an intermediate water circulation flow monitoring device 22, and a user-side flow monitoring device, respectively installed on the sewage circulation pipeline 13, the intermediate water circulation pipeline, and the user-side water circulation pipeline. The user-side flow monitoring device includes, for example, an attached... Figure 1The first user-side flow monitoring device 44 and the second user-side flow monitoring device 45 shown can take various forms, such as turbine flow meters, electromagnetic flow meters, or ultrasonic flow meters. These flow meters can accurately measure water flow and adapt to different water quality environments to monitor the flow parameters of sewage or intermediate water in each circulation pipeline. The temperature monitoring device includes a sewage-side temperature monitoring device 15, an intermediate water circulation temperature monitoring device 21, and a user-side flow temperature monitoring device 41, respectively installed on the sewage circulation pipeline 13, the intermediate water circulation pipeline, and the user-side water circulation pipeline. The temperature monitoring device can use temperature sensors such as thermocouples, thermistors, or platinum resistance thermometers. These sensors can respond quickly to temperature changes and provide accurate temperature data to monitor the temperature changes of sewage or intermediate water in each circulation pipeline.

[0030] In this embodiment, by setting the monitoring components to include flow monitoring devices and temperature monitoring devices, the flow rate and temperature changes of sewage or intermediate water in each circulation pipeline can be accurately monitored. Through the cooperation of these two monitoring devices and the comparison of data, the working status and performance parameters of the sewage heat exchanger 20 can be monitored in real time, providing reliable data support for the stable operation and performance evaluation of the system.

[0031] Optionally, such as Figure 1 As shown, the temperature monitoring device is installed on the inlet and return water pipes of the sewage circulation pipeline 13, the inlet and return water pipes of the intermediate water circulation pipeline, and the inlet and return water pipes of the user-side water circulation pipeline.

[0032] Specifically, the temperature monitoring devices include a wastewater-side temperature monitoring device 15, an intermediate water circulation temperature monitoring device 21, and a user-side flow temperature monitoring device 41, with at least two of each. These devices are respectively installed on the inlet and outlet pipes of the wastewater circulation pipeline 13, the inlet and outlet pipes of the intermediate water circulation pipeline, and the inlet and outlet pipes of the user-side water circulation pipeline. For example, by comparing and analyzing the monitoring data of the two wastewater-side temperature monitoring devices 15 on the inlet and outlet pipes of the wastewater circulation pipeline 13, the efficiency of wastewater heat exchange and other statuses can be obtained. By comparing and analyzing the data of the two intermediate water circulation temperature monitoring devices 21, the heat exchange efficiency of the intermediate water circulation can be obtained. By comparing and analyzing the data of the two user-side flow temperature monitoring devices 41, the efficiency of user-side circulation heat exchange can be obtained, so as to more accurately and realistically reflect the performance indicators of the wastewater heat exchanger.

[0033] In this embodiment, by installing temperature monitoring devices on the inlet and return water pipes of the sewage circulation pipe 13, the intermediate water circulation pipe, and the user-side water circulation pipe, real-time monitoring of the temperature in each pipe and temperature comparison of the inlet and return water pipes in each circulation pipe can be achieved, which can more accurately reflect the temperature changes of each part of the system, thereby improving the operating efficiency and reliability of the system.

[0034] Optionally, such as Figure 1 As shown, a first valve body 43 is provided on the user-side water circulation pipeline between the outlet of the heat pump unit 30 and the inlet of the buffer water tank 50, and a second valve body 46 is provided on the pipeline between the outlet of the heat pump unit 30 and the intermediate water trunk 40.

[0035] Specifically, the outlet of the heat pump unit 30 is connected to the intermediate water channel 40 via a pipeline, allowing the outlet water from the heat pump unit 30 to flow not only into the buffer tank 50 for user-side water use, but also into the intermediate water channel 40. The first valve body 43 and the second valve body 46 can be either electrically or manually adjustable valves, the choice depending on the system's automation level and cost considerations. Electrically adjustable valves can achieve remote control and automated adjustment via control signals, suitable for systems requiring precise control and remote monitoring. Manually adjustable valves, on the other hand, have a simpler structure and lower cost, suitable for applications where frequent adjustments are not required or automation requirements are low. Furthermore, the valve body material can be selected from corrosion-resistant and high-temperature-resistant materials based on the specific application environment to ensure long-term stable operation of the system.

[0036] In this embodiment, by adjusting the opening degree of the first valve body 43 and the second valve body 46, the user-side water circulation can be maintained within a stable temperature range, realistically simulating the actual user operating conditions. For example, during simulated heating conditions, if the user-side water circulation temperature is too high, the opening degree of the second valve body 46 can be opened or increased, while the opening degree of the first valve body 43 can be decreased or closed, allowing the user-side water to flow into the intermediate water channel 40 for cooling. Conversely, by setting two valve bodies on the pipeline, the system can adjust the flow direction and flow rate of the water as needed, ensuring that the outlet water flow of the heat pump unit 30 can be reasonably distributed to the buffer tank 50 and the intermediate water channel 40. This design makes the system more flexible and efficient in actual operation, helps improve the overall performance of the heat pump unit 30 and the system stability, and can more realistically simulate the cooling and heating operations on the user side, thereby further improving the authenticity and reliability of the performance test data of the sewage heat exchanger 20.

[0037] Optionally, such as Figure 1As shown, a first user-side flow monitoring device 44 is installed on the user-side water circulation pipeline between the outlet of the heat pump unit 30 and the inlet of the buffer water tank 50, and a second user-side flow monitoring device 45 is installed on the pipeline between the outlet of the heat pump unit 30 and the intermediate water trunk 40.

[0038] Specifically, the first user-side traffic monitoring device 44 and the second user-side traffic monitoring device 45 adopt the same structure, which facilitates installation.

[0039] In this embodiment, by installing a first user-side flow monitoring device 44 on the pipeline between the outlet of the heat pump unit 30 and the inlet of the buffer water tank 50, the user-side water flow from the heat pump unit 30 to the buffer water tank 50 can be monitored. By installing a second user-side flow monitoring device 45 on the pipeline between the outlet of the heat pump unit 30 and the intermediate water channel 40, the user-side water flow from the heat pump unit 30 to the intermediate water channel 40 can be monitored. On the one hand, the flow rate changes of the user-side water circulation can be monitored more accurately, providing more precise monitoring data and improving the accuracy and reliability of the overall test. On the other hand, it is convenient to adjust the temperature of the user-side water circulation, providing a reliable basis for flow rate adjustment and ensuring the overall reliable and stable operation of the system.

[0040] Optionally, such as Figure 1 As shown, an intermediate water flow monitoring device 52 and an intermediate water temperature monitoring device 53 are installed on the pipeline between the inlet of the intermediate water channel 40 and the buffer water tank 50.

[0041] Specifically, the intermediate water flow monitoring device 52 can employ common flow measurement devices such as electromagnetic flow meters, ultrasonic flow meters, or turbine flow meters. These devices can provide high-precision flow measurement under different environmental and fluid conditions. The intermediate water temperature monitoring device 53 can employ temperature sensors such as thermocouples, resistance temperature detectors (RTDs), or platinum resistance thermometers. These sensors feature fast response speed and high measurement accuracy, enabling real-time monitoring of intermediate water temperature changes. Furthermore, the monitoring device can transmit data to the control system via wireless or wired communication, achieving remote monitoring and data recording.

[0042] In this embodiment, by installing an intermediate water flow monitoring device 52 and an intermediate water temperature monitoring device 53 on the pipeline between the inlet of the intermediate water main channel 40 and the buffer water tank 50, it is possible not only to monitor the flow and temperature of the intermediate water in real time, but also to promptly detect abnormal situations in the system operation, provide early warnings and handle them, thereby improving the system's operating efficiency and reliability. Furthermore, the structure is simple, easy to implement, and can provide more realistic and reliable monitoring data, avoiding the deviation problems caused by simulated working conditions in existing test systems, and providing more realistic, accurate and reliable test data.

[0043] Optionally, such as Figure 1 As shown, an intermediate water intake pump 51 is provided at the water intake end of the pipeline between the intermediate water trunk 40 and the inlet of the buffer water tank 50. The intermediate water intake pump 51 is located inside the intermediate water trunk 40, and the intermediate water discharge end 47 of the pipeline between the outlet of the heat pump unit 30 and the intermediate water trunk 40 is located inside the intermediate water trunk 40.

[0044] Specifically, the intermediate water intake pump 51 can be a submersible pump or other suitable pump type to ensure stable operation within the intermediate water main channel 40. The intermediate water discharge end 47 can be designed as an adjustable discharge port to adjust the discharge volume according to actual needs.

[0045] In this embodiment, by setting up an intermediate water intake pump 51, it is ensured that the intermediate water can be smoothly transported from the intermediate water main channel 40 to the buffer water tank 50, thus guaranteeing the circulation of the intermediate water. By setting the intermediate water intake pump 51 inside the intermediate water main channel 40, it helps to improve the compactness and integration of the system and reduce the space occupied by external equipment. The intermediate water discharge end 47 of the pipeline between the outlet of the heat pump unit 30 and the intermediate water main channel 40 is set inside the intermediate water main channel 40, ensuring that the intermediate water can be effectively discharged back into the intermediate water main channel 40 to complete the circulation process, thereby ensuring the normal operation of the system and helping to improve the overall efficiency and reliability of the system. Furthermore, through the above structural settings, this system has the advantages of compact structure, high integration, small space occupation, and stable operation, which can better meet the needs of practical applications.

[0046] Optionally, such as Figure 1 As shown, a user-side water circulation pump 42 is installed on the user-side water circulation pipeline.

[0047] Specifically, the user-side water circulation pump 42 can be implemented in various ways. For example, a centrifugal pump or other types of water pump can be used, depending on the system requirements and design parameters. The user-side water circulation pump 42 can be installed at any location in the user-side water circulation pipeline, as long as it can effectively drive water circulation. For example, the user-side water circulation pump 42 can be installed on the pipeline close to the heat pump unit 30 to better control the power and direction of the water flow.

[0048] In this embodiment, by setting up a user-side water circulation pump 42, the smoothness and stability of the user-side water circulation are ensured, the heat exchange efficiency of the system is improved, and by adding a user-side water circulation pump 42, a more reliable and efficient water circulation scheme is provided, avoiding the problem of system performance degradation caused by poor water circulation.

[0049] Optionally, such as Figure 1 As shown, an intermediate water circulation pump 23 is installed on the intermediate water circulation pipeline.

[0050] Specifically, the intermediate water circulation pump 23 can be installed in various ways. For example, one or more intermediate water circulation pumps 23 can be installed at appropriate locations in the intermediate water circulation pipeline to ensure the flow requirements of the intermediate water under different operating conditions. For example, an intermediate water circulation pump 23 can be installed at the inlet end of the intermediate water circulation pipeline to increase the flow rate of the intermediate water, or an intermediate water circulation pump 23 can be installed at the return end of the intermediate water circulation pipeline to ensure smooth return of the intermediate water. Preferably, an intermediate water circulation pump 23 can be installed in the middle of the intermediate water circulation pipeline to balance the water pressure and flow in the intermediate water circulation pipeline.

[0051] In this embodiment, by setting up an intermediate water circulation pump 23, the smooth flow of intermediate water in the intermediate water circulation pipeline is ensured, which improves the heat exchange efficiency between the sewage heat exchanger 20 and the heat pump unit 30, avoids the impact of insufficient or stagnant water flow on the heat exchange performance of the system, further improves the stability and reliability of the system, and ensures that the system can operate normally under different working conditions.

[0052] Optionally, such as Figure 1 As shown, a sewage intake pump 11 is provided at the water intake end of the sewage circulation pipeline 13 between the sewage trunk 10 and the inlet of the sewage heat exchanger 20. The sewage intake pump 11 is located inside the sewage trunk 10, and the sewage discharge end 12 of the sewage circulation pipeline 13 between the outlet of the sewage heat exchanger 20 and the sewage trunk 10 is located inside the sewage trunk 10.

[0053] Specifically, the sewage intake pump 11 can be a submersible pump or other types of sewage pumps. The specific selection can be determined based on the actual conditions of the sewage trunk 10 and the requirements of the sewage heat exchanger 20. Submersible pumps can be placed directly inside the sewage trunk 10, offering advantages such as convenient installation and minimal space occupation. The sewage discharge end 12 of the pipeline between the outlet of the sewage heat exchanger 20 and the sewage trunk 10 can be located at different positions within the sewage trunk 10 to ensure that the heat-exchanged sewage can be smoothly discharged back into the sewage trunk 10. This arrangement can be reasonably implemented according to the actual site conditions to reduce space occupation.

[0054] In this embodiment, a sewage intake pump 11 is installed at the water intake end of the pipeline between the sewage trunk 10 and the inlet of the sewage heat exchanger 20. The sewage intake pump 11 can transport sewage from the sewage trunk 10 to the sewage heat exchanger 20, thereby ensuring that the sewage can effectively enter the sewage heat exchanger 20 for heat exchange. By setting the sewage intake pump 11 inside the sewage trunk 10, sewage can be effectively extracted from the sewage trunk 10, and the space occupied is reduced. The sewage discharge end 12 of the pipeline between the outlet of the sewage heat exchanger 20 and the sewage trunk 10 is set inside the sewage trunk 10, which facilitates the discharge of the heat-exchanged sewage back to the sewage trunk 10 and facilitates assembly and overall layout. It can ensure the effective flow and circulation of sewage in the sewage heat exchanger 20, and make the system more efficient and reliable as a whole. It has the advantages of simple structure, low cost and convenient maintenance.

[0055] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A performance testing system for a raw wastewater heat exchanger, characterized in that, The system comprises a sewage main (10), a sewage heat exchanger (20), a heat pump unit (30), an intermediate water main (40) and a buffer water tank (50), the sewage main (10) is connected with the sewage heat exchanger (20) through a sewage circulating pipeline (13), the sewage heat exchanger (20) is connected with the heat pump unit (30) through an intermediate water circulating pipeline, the heat pump unit (30) is connected with the buffer water tank (50) through a user-side water circulating pipeline, and the heat pump unit (30) and the buffer water tank (50) are also connected with the intermediate water main (40) through pipelines respectively, and the sewage circulating pipeline (13), the intermediate water circulating pipeline and the user-side water circulating pipeline are respectively provided with monitoring components.

2. The primary sewage heat exchanger performance test system of claim 1, wherein, The monitoring component comprises a flow monitoring component and a temperature monitoring component.

3. The primary sewage heat exchanger performance test system of claim 2, wherein, The sewage circulating pipeline (13), the intermediate water circulating pipeline and the user-side water circulating pipeline are respectively provided with the temperature monitoring component.

4. The primary sewage heat exchanger performance testing system of claim 1, wherein, A first valve body (43) is arranged on the user-side water circulating pipeline between the outlet of the heat pump unit (30) and the inlet of the buffer water tank (50), and a second valve body (46) is arranged on the pipeline between the outlet of the heat pump unit (30) and the intermediate water main (40).

5. The primary sewage heat exchanger performance test system of claim 4, wherein, A first user-side flow monitoring component (44) is arranged on the user-side water circulating pipeline between the outlet of the heat pump unit (30) and the inlet of the buffer water tank (50), and a second user-side flow monitoring component (45) is arranged on the pipeline between the outlet of the heat pump unit (30) and the intermediate water main (40).

6. The primary sewage heat exchanger performance testing system of claim 1, wherein, An intermediate water flow monitoring component (52) and an intermediate water temperature monitoring component (53) are arranged on the pipeline between the intermediate water main (40) and the inlet of the buffer water tank (50).

7. The primary sewage heat exchanger performance testing system of claim 1, wherein, An intermediate water extraction pump (51) is arranged at a water extraction end of the pipeline between the intermediate water main (40) and the inlet of the buffer water tank (50), the intermediate water extraction pump (51) is arranged in the intermediate water main (40), and an intermediate water discharge end (47) of the pipeline between the outlet of the heat pump unit (30) and the intermediate water main (40) is arranged in the intermediate water main (40).

8. The primary sewage heat exchanger performance testing system of claim 1, wherein, A user-side water circulating pump (42) is arranged on the user-side water circulating pipeline.

9. The primary sewage heat exchanger performance testing system of claim 1, wherein, An intermediate water circulating pump (23) is arranged on the intermediate water circulating pipeline.

10. The primary sewage heat exchanger performance test system of any one of claims 1-9, wherein, A sewage extraction pump (11) is arranged at a water extraction end of the sewage circulating pipeline (13) between the sewage main (10) and the inlet of the sewage heat exchanger (20), the sewage extraction pump (11) is arranged in the sewage main (10), and a sewage discharge end (12) of the sewage circulating pipeline (13) between the outlet of the sewage heat exchanger (20) and the sewage main (10) is arranged in the sewage main (10).

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