Pipe network water mixing heat supply system
By implementing zoned and graded control and mixing within the mixing tank in the pipe network mixing heating system, the problem of unutilized heat from the return water is solved, enabling flexible adjustment of district heating temperature and efficient utilization of heat energy, thus enhancing the system's adaptability and flexibility.
Patent Information
- Application Number
- CN202520046944.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-09
AI Technical Summary
In existing piped mixed-water heating systems, the heat of the return water is not fully utilized, resulting in energy waste. Furthermore, the large flow rate and small temperature difference between the supply and return water lead to excessive energy consumption.
The pipe network mixing heating system adopts zoned and graded control. By setting up mixing stations and mixing tanks in each heating zone, the heating temperature is adjusted according to the regional demand. High-temperature supply water and low-temperature return water are mixed in the mixing tank to improve the efficiency of heat energy utilization.
It enables flexible adjustment based on the heating needs of different areas, reduces energy consumption, improves thermal energy utilization efficiency, and enhances the system's flexibility and adaptability.
Smart Images
Figure CN223826308U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of heat supply, especially relates to a pipe network water mixing heat supply system. BACKGROUND
[0002] As a connection mode of hot water heat supply system, the pipe network water mixing heat supply system can trace its origin to the continuous pursuit of energy saving and power saving of heat supply system. With the increasingly prominent energy problem and the continuous development of heat supply technology, water mixing heat supply technology has gradually been valued and widely applied. The pipe network water mixing heat supply system mainly mixes part of the return water of the user into the water supplied by the heat source, thereby increasing the circulating water volume on the user side and reducing the user water supply temperature to adapt to the demand of indoor heat dissipation devices for flow and temperature. This heat supply mode and the indirect connection mode of the heat exchanger have a similar primary side delivery system and secondary side indoor heating system, so that the primary side delivery system can realize large temperature difference and small flow operation, and the secondary side heating system can more conveniently adapt to the demand of indoor facilities for temperature, temperature difference and flow.
[0003] The existing pipe network water mixing heat supply system usually adopts a unified water supply mode, that is, during the heat supply process, the hot water heated by the heat source is directly delivered to each user after heat exchange in the heat exchanger for heating, and in the recovery process, the return water is uniformly returned to the heat source for heating or partially enters the heat exchanger for heat exchange. The heat of the return water cannot be fully utilized, and there is a phenomenon of large flow and small temperature difference in water supply and return, resulting in waste of energy.
[0004] Therefore, it is necessary to develop a pipe network water mixing heat supply system to solve the above-mentioned defects. UTILITY MODEL CONTENTS
[0005] The utility model aims to provide a pipe network water mixing heat supply system, which can be adjusted according to the heating demand of different areas through zoned and graded control, thereby avoiding excessive consumption of energy and further improving the utilization efficiency of heat energy.
[0006] To solve the above technical problems, the utility model adopts the following technical scheme:
[0007] The utility model relates to a kind of pipe network water mixing heating system, including heating source and heat exchange station, heat exchanger is provided in the heat exchange station, the heat exchanger heating end is connected with first-stage water supply pipeline, first-stage return water pipeline respectively, the first-stage water supply pipeline, first-stage return water pipeline another end is connected with the heating source respectively;The heat exchanger heat exchange end is connected with second-stage water supply pipeline and second-stage return water pipeline respectively, and there are a plurality of heating areas in parallel between the second-stage water supply pipeline and second-stage return water pipeline, and area water supply pipeline is communicated between the water inlet end of the heating area and the second-stage water supply pipeline, and area return water pipeline is communicated between the water outlet end of the heating area and the second-stage return water pipeline;Water mixing station is provided in each heating area, and water mixing tank is provided in the water mixing station, the water mixing tank is connected on the area water supply pipeline, and the water mixing tank is communicated with the area return water pipeline.
[0008] Further, the area water supply pipeline between the water mixing tank and the second-stage water supply pipeline is connected with water mixing valve, and circulation pipeline is communicated between the water mixing valve and the area return water pipeline.
[0009] Further, first circulation pump is connected on the circulation pipeline, and the water mixing valve and the first circulation pump are located in the water mixing station.
[0010] Further, temperature sensor is fixedly installed on the water mixing tank, and the temperature sensor is used to detect water temperature in the water mixing tank.
[0011] Further, supplementary water pipeline is communicated on the first-stage return water pipeline and the second-stage return water pipeline, supplementary water pump is connected on the supplementary water pipeline, and the other end of the supplementary water pipeline is connected with external water source.
[0012] Further, second circulation pump is connected on the first-stage return water pipeline close to the heating source, and third circulation pump is connected on the second-stage return water pipeline close to the heat exchanger.
[0013] Further, the number of the second circulation pump and the third circulation pump is two, two second circulation pumps are connected in parallel on the first-stage return water pipeline, and two third circulation pumps are connected in parallel on the second-stage return water pipeline.
[0014] Compared with prior art, the utility model has the beneficial technical effects:
[0015] The utility model discloses a kind of pipe network mixed water heating systems, by zoning and grading control, can be adjusted according to different regional heating needs, avoid the excessive consumption of energy, further improve the utilization efficiency of heat energy. BRIEF DESCRIPTION OF DRAWINGS
[0016] The utility model will be further described with the description of the drawings.
[0017] Figure 1 It is the structure diagram of pipe network mixed water heating system of the utility model;
[0018] Figure 2 It is Figure 1 Partial enlarged view of A part in middle.
[0019] Reference signs: 1, heating source;2, heat exchange station;3, heat exchanger;4, primary water supply pipeline;5, primary backwater pipeline;6, secondary water supply pipeline;7, secondary backwater pipeline;8, heating area;9, regional water supply pipeline;10, regional backwater pipeline;11, mixed water station;12, mixed water tank;13, mixed water valve;14, circulating pipeline;15, first circulating pump;16, temperature sensor;17, water supply pipeline;18, water supply pump;19, second circulating pump;20, third circulating pump. DETAILED DESCRIPTION
[0020] The core of the utility model is to provide a kind of pipe network mixed water heating system, by zoning and grading control, can be adjusted according to different regional heating needs, avoid the excessive consumption of energy, further improve the utilization efficiency of heat energy.
[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the scope of the utility model.
[0022] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0023] In a specific embodiment, as shown in Figure 1 and Figure 2 , including heating source 1 and heat exchange station 2, heat exchanger 3 is arranged in heat exchange station 2, the heating end of heat exchanger 3 is connected with first-stage water supply pipeline 4 and first-stage water return pipeline 5 respectively, the other end of first-stage water supply pipeline 4 and first-stage water return pipeline 5 is connected with heating source 1 respectively; the heat exchange end of heat exchanger 3 is connected with second-stage water supply pipeline 6 and second-stage water return pipeline 7 respectively, a plurality of heating areas 8 are connected in parallel between second-stage water supply pipeline 6 and second-stage water return pipeline 7, area water supply pipeline 9 is communicated between the water inlet end of heating area 8 and second-stage water supply pipeline 6, and area water return pipeline 10 is communicated between the water outlet end of heating area 8 and second-stage water return pipeline 7; water mixing station 11 is arranged in each heating area 8, water mixing tank 12 is arranged in water mixing station 11, water mixing tank 12 is connected in series on area water supply pipeline 9, and water mixing tank 12 is communicated with area water return pipeline 10.
[0024] First-stage water supply pipeline 4 and first-stage water return pipeline 5 are connected with heat exchanger 3 and heating source 1 respectively, forming a first-stage circulation, and second-stage water supply pipeline 6 and second-stage water return pipeline 7 are connected with heat exchanger 3 and heating area 8 respectively, forming a second-stage circulation. The setting of heating source 1 can provide heat energy for the first-stage circulation, and heating source 1 can be a boiler or an electric heating plant and the like which can heat the water in the pipeline of the first-stage circulation. Heat exchanger 3 is a plate heat exchanger, which can transfer the heat energy of hot water in first-stage water supply pipeline 4 of the first-stage circulation to low-temperature return water of second-stage water return pipeline 7, so that second-stage water supply pipeline 6 can provide high-temperature hot water to each heating area 8. Through water mixing tank 12, the high-temperature hot water delivered by area water supply pipeline 9 and the low-temperature return water delivered by area water return pipeline 10 can be mixed, and then the hot water with suitable temperature is delivered to heating area 8. Thus, the heat energy of low-temperature return water is fully utilized, and the utilization efficiency of heat energy is improved.
[0025] In a specific embodiment, water mixing valve 13 is connected on area water supply pipeline 9 between water mixing tank 12 and second-stage water supply pipeline 6, circulation pipeline 14 is communicated between water mixing valve 13 and area water return pipeline 10.
[0026] Through the setting of the mixing valve 13, the flow of high-temperature hot water of the secondary water supply pipeline 6 into the mixing tank 12 through the regional water supply pipeline 9 and the flow of low-temperature return water of the regional return water pipeline 10 into the mixing tank 12 through the circulating pipeline 14 can be adjusted and controlled, so that the temperature of the hot water provided by the mixing tank 12 to the heating area 8 can be adjusted.
[0027] Specifically, the first circulating pump 15 is connected to the circulating pipeline 14, and the mixing valve 13 and the first circulating pump 15 are located in the mixing station 11.
[0028] Through the setting of the first circulating pump 15, power can be provided for the low-temperature return water of the regional return water pipeline 10 to enter the mixing tank 12 through the circulating pipeline 14.
[0029] Specifically, the temperature sensor 16 is fixedly installed on the mixing tank 12, and the temperature sensor 16 is used to detect the water temperature in the mixing tank 12.
[0030] Through the setting of the temperature sensor 16, the water temperature in the mixing tank 12 can be monitored in real time, and the stability of the water supply temperature can be ensured.
[0031] In a specific embodiment, the supplemental water pipeline 17 is connected to the primary return water pipeline 5 and the secondary return water pipeline 7, the supplemental water pump 18 is connected to the supplemental water pipeline 17, and the other end of the supplemental water pipeline 17 is connected to an external water source.
[0032] During the circulation process, the water volume in the system may gradually decrease due to evaporation, leakage or other reasons. By connecting the external water source through the supplemental water pipeline 17 and providing water pressure through the supplemental water pump 18, the required water volume of the system can be supplemented, and the stable operation of the system can be maintained. The system is prevented from running poorly or being damaged due to lack of water, and the reliability and durability of the system are improved.
[0033] In a specific embodiment, the second circulating pump 19 is connected to the primary return water pipeline 5 near the heating source 1, and the third circulating pump 20 is connected to the secondary return water pipeline 7 near the heat exchanger 3.
[0034] Through the setting of the second circulating pump 19 and the third circulating pump 20, the circulation of water flow in the primary water supply pipeline 4, the primary return water pipeline 5, the secondary water supply pipeline 6 and the secondary return water pipeline 7 can be ensured.
[0035] Specifically, the number of the second circulating pump 19 and the third circulating pump 20 is two, two second circulating pumps 19 are connected in parallel to the primary return water pipeline 5, and two third circulating pumps 20 are connected in parallel to the secondary return water pipeline 7.
[0036] By the arrangement of two parallel second circulating pumps 19 and third circulating pumps 20, the water supply capacity of water circulation in the system can be improved, the water flow is increased, and the heating effect is ensured during the heating peak period. In addition, for relatively long heating pipelines or heating areas 8, the effect of parallel connection of two second circulating pumps 19 and two third circulating pumps 20 is particularly obvious, and the heating effect of the entire system can be improved. At the same time, the redundancy and flexibility of the system are increased. When one of the two parallel pumps fails, the other pump can still work normally, ensuring the continuous operation of the system. In addition, according to the actual demand and load change of the system, the energy efficiency of the system can be optimized by adjusting the number of operating parallel pumps.
[0037] The working principle of the utility model is: when the pipe network water mixing heating system is used, the heating source 1 generates heat energy, the heated hot water is transported to the heating end of the heat exchanger 3 through the first water supply pipeline 4, the heat exchanger 3 transmits the heat energy of the hot water in the first water supply pipeline 4 to the low-temperature return water in the second return water pipeline 7, and the first return water pipeline 5 returns the hot water with released part of heat energy to the heating source 1 for re-heating, forming a first circulation.
[0038] The high-temperature hot water after heat exchange of the heat exchanger 3 is transported to each heating area 8 through the second water supply pipeline 6. In the heating area 8, the high-temperature hot water enters the water mixing tank 12 of the water mixing station 11 through the area water supply pipeline 9. The water mixing tank 12 mixes the high-temperature hot water with the low-temperature return water returned through the area return water pipeline 10, and adjusts the hot water with a temperature suitable for the heating area 8. The adjusted hot water continues to flow to the heating area 8 for heating, and the low-temperature return water returns to the water mixing station 11 through the area return water pipeline 10 and the circulating pipeline 14, and returns to the second return water pipeline 7, forming a second circulation.
[0039] The water mixing process in the water mixing tank 12 is adjusted by the water mixing valve 13 and the first circulating pump 15. The water mixing valve 13 controls the flow ratio of the high-temperature hot water and the low-temperature return water entering the water mixing tank 12, so as to adjust the water temperature after water mixing. The first circulating pump 15 provides power for the low-temperature return water entering the water mixing tank 12, ensuring the smooth progress of the water mixing process. The temperature sensor 16 monitors the water temperature in the water mixing tank 12 in real time, ensures the stability of the water supply temperature, and adjusts the opening of the water mixing valve 13 as needed.
[0040] The water supplement pipeline 17 and the water supplement pump 18 in the system ensure the stability of the water quantity. When the water quantity of the system is reduced due to evaporation, leakage and other reasons, the water supplement pump 18 extracts water from the external water source and supplements it to the system through the water supplement pipeline 17.
[0041] The second circulating pump 19 and the third circulating pump 20 are respectively arranged on the first return water pipeline 5 and the second return water pipeline 7 to ensure the circulation of water flow in the pipeline. The two parallel second circulating pump 19 and the third circulating pump 20 improve the water supply capacity and flexibility of the system, ensuring good heating effect during the heating peak period or in long-distance heating pipeline. The parallel second circulating pump 19 and the third circulating pump 20 increase the redundancy of the system, and when one pump fails, the other pump can still work normally, ensuring the continuous operation of the system. According to the actual demand and load change of the system, the energy efficiency of the system can be optimized by adjusting the number of parallel pumps in operation, realizing energy saving and consumption reduction.
[0042] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.
[0043] The above-described embodiments are only used to describe the preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements of the technical scheme of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.
Claims
1. A pipe network mixing water heating system, characterized in that: The system includes a heating source (1) and a heat exchange station (2). The heat exchange station (2) is equipped with a heat exchanger (3). The heat supply end of the heat exchanger (3) is connected to a primary water supply pipeline (4) and a primary water return pipeline (5). The other ends of the primary water supply pipeline (4) and the primary water return pipeline (5) are connected to the heating source (1). The heat exchange end of the heat exchanger (3) is connected to a secondary water supply pipeline (6) and a secondary water return pipeline (7). Several heating zones are connected in parallel between the secondary water supply pipeline (6) and the secondary water return pipeline (7). (8) A regional water supply pipeline (9) is connected between the water inlet of the heating zone (8) and the secondary water supply pipeline (6), and a regional return water pipeline (10) is connected between the water outlet of the heating zone (8) and the secondary return water pipeline (7); a mixing station (11) is provided in each heating zone (8), and a mixing tank (12) is provided in the mixing station (11). The mixing tank (12) is connected in series with the regional water supply pipeline (9), and the mixing tank (12) is connected with the regional return water pipeline (10).
2. The pipe network mixing water heating system according to claim 1, characterized in that: A mixing valve (13) is connected to the regional water supply pipeline (9) between the mixing tank (12) and the secondary water supply pipeline (6), and a circulation pipeline (14) is connected between the mixing valve (13) and the regional return water pipeline (10).
3. The pipe network mixing water heating system according to claim 2, characterized in that: The circulation pipeline (14) is connected to a first circulation pump (15), and the mixing valve (13) and the first circulation pump (15) are located in the mixing station (11).
4. The pipe network mixing water heating system according to claim 3, characterized in that: A temperature sensor (16) is fixedly installed on the mixing tank (12), and the temperature sensor (16) is used to detect the water temperature inside the mixing tank (12).
5. The pipe network mixing water heating system according to claim 1, characterized in that: Both the primary return water pipeline (5) and the secondary return water pipeline (7) are connected to a water supply pipeline (17), and a water supply pump (18) is connected to the water supply pipeline (17). The other end of the water supply pipeline (17) is connected to an external water source.
6. The pipe network mixing water heating system according to claim 1, characterized in that: The first-stage return water pipeline (5) is connected to a second circulation pump (19) at one end near the heating source (1), and the second-stage return water pipeline (7) is connected to a third circulation pump (20) at one end near the heat exchanger (3).
7. The pipe network mixing water heating system according to claim 6, characterized in that: There are two of each of the second circulation pump (19) and the third circulation pump (20). The two second circulation pumps (19) are connected in parallel on the primary return water pipeline (5), and the two third circulation pumps (20) are connected in parallel on the secondary return water pipeline (7).