Sewage source heat pump system aiming at different user requirements and design method thereof

Abstract

The invention discloses a sewage source heat pump system for different user requirements and a design method of the sewage source heat pump system, and belongs to the field of energy recovery and heat energy utilization. According to the system, a water taking point and a water returning point of a sewage source heat pump are reasonably designed according to different requirements of residential users and commercial complexes, a clean water tank or a buffer tank of a V-shaped filter tank is selected as a water source, and water subjected to heat exchange is properly treated, so that the operation efficiency of the system is improved, the influence of water source extraction on the sewage treatment process is reduced, and the energy consumption is reduced. And stable operation of the sewage plant and the water source heat pump unit is ensured. The method can effectively improve the utilization efficiency of the heat energy of the sewage, reduces the operation cost, meets the heat energy requirements of different users, and has better economic benefits and social benefits.

Description

Technical Field

[0001] The present application relates to the field of energy recovery and thermal energy utilization, and in particular to a sewage source heat pump system and a design method thereof for different user needs. Background Art

[0002] Sewage source heat pump technology uses the treated sewage in the sewage treatment plant as a heat source or cold source, and extracts low-grade heat energy through heat exchange technology for heating, cooling and hot water supply in the plant area, and can even export heat energy to the outside. The sewage source heat pump system has the advantages of energy saving and environmental protection, so it has been used in some sewage treatment plants. However, there are some problems in the implementation of the existing technology, especially in the selection of water intake points and return points for different user needs and sewage source heat pump operation. At present, there are relatively few application cases of sewage source heat pumps in my country, and the scale is generally small. In actual operation, there are two main problems.

[0003] The needs of different types of users are different. There are large differences in the heat energy demand and operating time of residential users and commercial complexes. The existing design cannot flexibly adapt to the changes in the needs of different users, resulting in low operating efficiency of the heat pump system. Secondly, the selection of water intake and return points is unreasonable. The selection of water intake and return points of sewage source heat pumps has an important impact on the operation of the entire system, especially in the case of unreasonable design, which may affect the normal operation of the sewage treatment plant. For example, when the water intake point is over-pumped, the water level in the front-end pool will be reduced, thereby affecting the backwash process of sewage treatment and reducing the sewage treatment effect.

[0004] In view of the above problems, the present invention proposes a new design scheme of sewage source heat pump system. By reasonably selecting water intake points and return points according to different user types (residential and commercial complexes), it not only optimizes the utilization efficiency of water sources, but also ensures the stable operation of sewage treatment plants and heat pump systems, thereby improving the economic and social benefits of the system. Summary of the invention

[0005] The embodiment of the present application provides a sewage source heat pump system and a design method thereof for different user needs. The technical solution is as follows:

[0006] According to one aspect of the present application, a sewage source heat pump system for different user needs is provided, the system comprising:

[0007] The main body of the sewage treatment plant is equipped with sewage treatment tanks, V-type filter tanks, clean water tanks, disinfection tanks and buffer tanks;

[0008] A sewage source heat pump unit, including a water pump, a heat exchanger, and a pipe connection assembly;

[0009] The water source heat pump water intake system for residential users is designed with the water intake point as the clean water tank of the V-type filter tank, and the water is returned to the disinfection tank after heat exchange;

[0010] The water source heat pump water intake system of the commercial complex is designed to have both the water intake point and the water return point set in the buffer tank, which is located between the V-shaped filter tank and the disinfection tank;

[0011] The water pump of the sewage source heat pump unit is connected to the clean water tank or the buffer tank through a pipeline system for supplying water to the heat exchanger. After heat exchange, the return water pipeline leads to the disinfection tank or the buffer tank.

[0012] Optionally, the volume of the buffer tank is 20% of the design scale of the sewage treatment plant, and can accommodate the water output of a single water source heat pump for 10 minutes, thereby preventing the water in the front-end clear water tank from being drained.

[0013] Optionally, the heat exchanger of the sewage source heat pump unit adopts high-efficiency heat exchange technology to improve heat energy recovery efficiency and reduce energy loss.

[0014] Optionally, the sewage source heat pump unit further includes a temperature and flow sensor for monitoring the temperature and flow of the water source in real time to adjust the system operating state and ensure efficient operation of the heat pump.

[0015] On the other hand, a method for designing a sewage source heat pump system for different user needs is provided, the method being used for the sewage source heat pump system for different user needs as described above, the method comprising:

[0016] For residential users, the required water volume is calculated based on the design scale of the sewage treatment plant and the operation time of the heat pump, and the water intake point of the water source heat pump is determined to be the clear water tank of the V-type filter tank, and the water is returned to the disinfection tank after heat exchange;

[0017] For commercial complexes, the required water volume is calculated based on the design scale of the sewage treatment plant and the operation time of the heat pump, and the water intake point and return point of the water source heat pump are determined to be set in the buffer tank, which is located between the V-type filter tank and the disinfection tank;

[0018] During the operation of the sewage source heat pump, water is supplied to the heat exchanger through a water pump for heat exchange, and the cold water returns to the disinfection tank or buffer tank for subsequent treatment.

[0019] Optionally, for residential users, the water source heat pump runs for 24 hours, the required water volume is calculated to be 80% of the design scale of the sewage treatment plant, and the daily water intake of the water source heat pump is about 3333.3m 3 / h.

[0020] Optionally, for the commercial complex, the operation time of the water source heat pump is 16 hours, the required water volume is calculated to be 80% of the design scale of the sewage treatment plant, and the required water volume of the water source heat pump is about 5000m3 / h.

[0021] Optionally, the control component starts the synchronous motor, including:

[0022] When the displacement data of the displacement sensor indicates that the slider is moving, the water source heat pump returns water to the disinfection pool to further disinfect the sewage after heat exchange to ensure water quality safety.

[0023] The present invention discloses a sewage source heat pump system and a design method thereof for different user needs. The system reasonably designs the water intake point and return water point of the sewage source heat pump according to the different needs of residential users and commercial complexes, selects the clear water tank or buffer tank of the V-type filter as the water source, and properly treats the water after heat exchange, thereby improving the system operation efficiency, reducing the impact of water source extraction on the sewage treatment process, and ensuring the stable operation of the sewage plant and the water source heat pump unit. The method can effectively improve the utilization efficiency of sewage heat energy, reduce operating costs, and meet the heat energy needs of different users, with good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of a sewage source heat pump water intake point and a water return point designed for a residential user, provided by an exemplary embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of a sewage source heat pump water intake point and return water point designed for a commercial complex, provided in an illustrative embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0027] The term "multiple" as used herein refers to two or more than two. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0028] Example 1

[0029] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a sewage source heat pump water intake point and a water return point designed for a residential user, provided by an exemplary embodiment of the present application. Figure 2 This is a schematic diagram of a sewage source heat pump water intake point and a water return point designed for a commercial complex provided by an exemplary embodiment of the present application. The sewage source heat pump system for different user needs includes:

[0030] The main body of the sewage treatment plant is equipped with sewage treatment tanks, V-type filter tanks, clean water tanks, disinfection tanks and buffer tanks;

[0031] A sewage source heat pump unit, including a water pump, a heat exchanger, and a pipe connection assembly;

[0032] The water source heat pump water intake system for residential users is designed with the water intake point as the clean water tank of the V-type filter tank, and the water is returned to the disinfection tank after heat exchange;

[0033] The water source heat pump water intake system of the commercial complex is designed to have both the water intake point and the water return point set in the buffer tank, which is located between the V-shaped filter tank and the disinfection tank;

[0034] The water pump of the sewage source heat pump unit is connected to the clean water tank or the buffer tank through a pipeline system for supplying water to the heat exchanger. After heat exchange, the return water pipeline leads to the disinfection tank or the buffer tank.

[0035] In the embodiment of the present application, by setting different water intake points between residential and commercial users (residential users use a V-type filter tank for clear water, and commercial users use a buffer tank), the water source can be reasonably configured according to the actual needs of each type of user to ensure that the system's water source is efficiently utilized.

[0036] In the embodiment of the present application, a clean water pool with good water quality is selected to avoid corrosion of the sewage source heat pump equipment by residual chlorine and other pollutants. At the same time, a buffer pool is set up in the commercial complex to effectively alleviate the impact of large-scale pumping on the water level of the pool.

[0037] In the embodiment of the present application, setting up a buffer tank effectively avoids the problem of water shortage caused by demand fluctuations in a short period of time, thereby improving the stability and operational safety of the water source heat pump system.

[0038] Example 2

[0039] Optionally, the volume of the buffer tank is 20% of the design scale of the sewage treatment plant, and can accommodate the water output of a single water source heat pump for 10 minutes, thereby preventing the water in the front-end clear water tank from being drained.

[0040] In this design, the volume of the buffer tank is designed to ensure that the water source can still maintain a stable supply under the maximum load, avoiding the impact of excessive water extraction on the water level of the pool, thereby ensuring the normal operation of the system. The volume design of the buffer tank avoids the rapid consumption of water sources caused by large-scale pumping, alleviates the drastic fluctuations in the water level of the front-end pool of the sewage plant, and ensures that key processes such as backwashing of sewage treatment are not disturbed.

[0041] Optionally, the heat exchanger of the sewage source heat pump unit adopts high-efficiency heat exchange technology to improve heat energy recovery efficiency and reduce energy loss.

[0042] In this design, the high-efficiency heat exchanger can extract heat from sewage to the greatest extent, reduce energy loss, and improve the energy efficiency of the system. Efficient heat exchange not only improves the efficiency of heat recovery, but also reduces the energy consumption required for system operation, thereby reducing operating costs and improving overall economic benefits.

[0043] Optionally, the sewage source heat pump unit further includes a temperature and flow sensor for monitoring the temperature and flow of the water source in real time to adjust the system operating state and ensure efficient operation of the heat pump.

[0044] In this design, temperature and flow sensors can monitor the heat energy status of the sewage source in real time, and adjust the working state of the heat pump through data feedback to ensure that the heat pump is always in an efficient working state. Through real-time data of temperature and flow, the system can flexibly adjust the water flow and heat exchange speed, improve the adjustability and response speed of the heat pump system, enable it to cope with changes in the sewage source, and thus improve the stability of the overall system.

[0045] Example 3

[0046] On the other hand, a method for designing a sewage source heat pump system for different user needs is provided, the method being used for the sewage source heat pump system for different user needs as described above, the method comprising:

[0047] For residential users, the required water volume is calculated based on the design scale of the sewage treatment plant and the operation time of the heat pump, and the water intake point of the water source heat pump is determined to be the clear water tank of the V-type filter tank, and the water is returned to the disinfection tank after heat exchange;

[0048] For commercial complexes, the required water volume is calculated based on the design scale of the sewage treatment plant and the operation time of the heat pump, and the water intake point and return point of the water source heat pump are determined to be set in the buffer tank, which is located between the V-type filter tank and the disinfection tank;

[0049] During the operation of the sewage source heat pump, water is supplied to the heat exchanger through a water pump for heat exchange, and the cold water returns to the disinfection tank or buffer tank for subsequent treatment.

[0050] In this method, the thermal energy demands of different types of users are calculated and the water intake and return points are flexibly designed according to the demands, so as to meet the different thermal energy demands of residential and commercial complexes.

[0051] By rationally designing the water intake and return points, it is ensured that the heat pump system can operate efficiently and stably under different needs of different types of users, avoiding the decline in efficiency of the heat pump system due to uneven water sources or inappropriate return water. This method enables the heat pump system to maintain efficient operation for a long time through reasonable water source heat exchange and return water design, reducing energy consumption caused by water source flow fluctuations.

[0052] Optionally, for residential users, the water source heat pump runs for 24 hours, the required water volume is calculated to be 80% of the design scale of the sewage treatment plant, and the daily water intake of the water source heat pump is about 3333.3m 3 / h.

[0053] Through 24-hour continuous operation, it ensures that residential users have heating or cooling around the clock and meets the comfort requirements of the living environment. At the same time, it optimizes the operation mode of the water source heat pump and improves the system utilization rate.

[0054] Optionally, for the commercial complex, the operation time of the water source heat pump is 16 hours, the required water volume is calculated to be 80% of the design scale of the sewage treatment plant, and the required water volume of the water source heat pump is about 5000m 3 / h.

[0055] The 16-hour operation time can adapt to the operating hours and load requirements of the commercial complex, avoiding the waste of heat energy, while reducing energy consumption and improving economic benefits.

[0056] The following are some application scenarios.

[0057] Assume that the design scale of the sewage treatment plant is 100,000 m 3 / d(4166.7m 3 / h), for residential users, the water source heat pump runs for 24 hours. The amount of water required by residential users is: 100,000 m 3 / d\times 0.8 / 24h=3333.3m 3 / h. The water intake point is the V-type filter clear water tank, and the return water is in front of the disinfection tank.

[0058] For the commercial complex, the operation time of the water source heat pump is 16 hours, and the water demand of the water source heat pump is 5000m 3 / h. The water intake point and return point are both set in the buffer tank with a volume of 833.3m 3 , ensuring that the maximum single pump water output for 10 minutes does not affect the water supply.

[0059] An embodiment of the present application also provides a computer-readable medium storing at least one instruction, wherein the at least one instruction is loaded and executed by the processor to implement the sewage source heat pump system design method for different user needs as described in the above embodiments.

[0060] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A sewage source heat pump system for different user needs, characterized in that: The system comprises: The main body of the sewage treatment plant is equipped with sewage treatment tanks, V-type filter tanks, clean water tanks, disinfection tanks and buffer tanks; A sewage source heat pump unit, including a water pump, a heat exchanger, and a pipe connection assembly; The water source heat pump water intake system for residential users is designed with the water intake point as the clean water tank of the V-type filter tank, and the water is returned to the disinfection tank after heat exchange; The water source heat pump water intake system of the commercial complex is designed to have both the water intake point and the water return point set in the buffer tank, which is located between the V-shaped filter tank and the disinfection tank; The water pump of the sewage source heat pump unit is connected to the clean water tank or the buffer tank through a pipeline system for supplying water to the heat exchanger. After heat exchange, the return water pipeline leads to the disinfection tank or the buffer tank.

2. The system according to claim 1, characterized in that The volume of the buffer tank is 20% of the design scale of the sewage treatment plant, and can accommodate the water output of a single water source heat pump for 10 minutes, thereby preventing the water in the front-end clear water tank from being emptied.

3. The system according to claim 2, characterized in that The heat exchanger of the sewage source heat pump unit adopts high-efficiency heat exchange technology to improve heat energy recovery efficiency and reduce energy loss.

4. The system according to any one of claims 1 to 3, characterized in that: The sewage source heat pump unit further includes a temperature and flow sensor for real-time monitoring of the temperature and flow of the water source to adjust the system operating state and ensure efficient operation of the heat pump.

5. A sewage source heat pump system design method for different user needs, characterized in that: The method is used for the sewage source heat pump system for different user needs as described in any one of claims 1 to 4, and the method comprises: For residential users, the required water volume is calculated based on the design scale of the sewage treatment plant and the operation time of the heat pump, and the water intake point of the water source heat pump is determined to be the clear water tank of the V-type filter tank, and the water is returned to the disinfection tank after heat exchange; For commercial complexes, the required water volume is calculated based on the design scale of the sewage treatment plant and the operation time of the heat pump, and the water intake point and return point of the water source heat pump are determined to be set in the buffer tank, which is located between the V-type filter tank and the disinfection tank; During the operation of the sewage source heat pump, water is supplied to the heat exchanger through a water pump for heat exchange, and the cold water returns to the disinfection tank or buffer tank for subsequent treatment.

6. The method according to claim 5, characterized in that For residential users, the water source heat pump runs for 24 hours, and the required water volume is calculated to be 80% of the design scale of the sewage treatment plant, and the daily water intake of the water source heat pump is about 3333.3m 3 / h.

7. The method according to claim 5, characterized in that For the commercial complex, the water source heat pump has an operating time of 16 hours, and the required water volume is calculated to be 80% of the design scale of the sewage treatment plant, and the required water volume of the water source heat pump is about 5000m 3 / h.

8. The method according to claim 6, characterized in that The control component starts the synchronous motor, comprising: When the displacement data of the displacement sensor indicates that the slider is moving, the water source heat pump returns water to the disinfection pool to further disinfect the sewage after heat exchange to ensure water quality safety.

Images