Clean energy centralized heating energy storage system

Abstract

The invention discloses a clean energy centralized heat supply and energy storage system, which relates to the technical field of centralized heat supply and energy storage, and comprises a tail end heat dissipation device, a plate heat exchanger, heat source equipment, a heat preservation water tank, a primary pipe network, a secondary pipe network and a heat storage pipe network, the primary pipe network comprises a primary pipe network circulating pump, a primary pipe network water supply pipe and a primary pipe network water return pipe, one end of the primary pipe network water supply pipe is communicated with the heat source equipment, the other end of the primary pipe network water supply pipe is communicated with the plate heat exchanger, and one end of the primary pipe network water return pipe is communicated with the heat source equipment; the heat source equipment, the primary pipe network water supply pipe, the plate heat exchanger and the primary pipe network water return pipe form primary pipe network waterway circulation. A large amount of water in the primary pipe network and the heat preservation water tank serves as a heat storage medium, heat is stored in the valley electricity period, heat is released in the peak electricity period, under the condition that only a small amount of investment is increased, heat source equipment in the peak electricity period is completely shut down, heat is supplied to the tail end only through heat energy stored in the valley electricity period, and the operation cost of the heat supply system is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of centralized heating energy storage, and in particular to a clean energy centralized heating energy storage system. Background Art

[0002] New clean energy heating systems, such as air-source heat pumps, water-source heat pumps, and electric boilers, are gradually replacing traditional coal-fired heating. With electricity prices during peak hours more than three times higher than during off-peak hours, while ensuring stable heating, staggering the operation of heat source equipment during peak hours and increasing it during off-peak hours, thereby achieving energy savings and lowering operating costs, is a key research direction in the field of heating energy conservation.

[0003] The publication number is "CN112013565A", which discloses a patent named "Heat Pump Unit Coupled Water Energy Storage Supply System". It couples the heat pump unit with the energy storage tank, stores cold / heat during off-peak hours, and releases cold / heat during peak hours. However, in order to achieve the function, the design is too complicated, and a large number of valves and pipelines are added. The construction and operation and maintenance are very difficult, and the operability is low. In addition, during the process of the energy storage tank releasing cold / heat to the terminal, the terminal water supply temperature is constantly changing, and the heating and cooling comfort is poor.

[0004] Publication number CN220669568U discloses a patent titled "An Intelligent Electric Heating System Utilizing Energy Storage in Heating Pipes." By increasing the size of the heating pipes by two sizes, an electric heater heats the water in the pipes during off-peak hours, while using the stored heat energy to provide heating during peak hours. However, for large-scale centralized heating systems, the primary pipe network is long and large in diameter. Increasing the pipe diameter by two sizes would require significant investment, making it suitable only for small heating systems.

[0005] However, as a centralized heating system, it has high operating costs (especially during peak power periods), large energy storage investments, and difficulty in variable load regulation. Therefore, it is necessary to develop a heating system that can save system operating costs. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of high operating costs (especially during peak power periods) of centralized heating systems in the existing technology, large energy storage investments, and difficult variable load control, and to propose a clean energy centralized heating energy storage system.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A clean energy centralized heating and energy storage system, comprising a terminal heat dissipation device, a plate heat exchanger, a heat source device, an insulated water tank, a primary pipe network, a secondary pipe network and a heat storage pipe network; The primary pipe network includes a primary pipe network circulation pump, a primary pipe network water supply pipe and a primary pipe network return pipe, one end of the primary pipe network water supply pipe is connected to the heat source equipment, and the other end is connected to the plate heat exchanger, and one end of the primary pipe network return pipe is connected to the heat source equipment, and the other end is connected to the plate heat exchanger; The primary pipe network circulation pump is installed on the primary pipe network return pipe; The secondary pipe network includes a terminal circulation pump, an electric regulating valve, a heat meter, a secondary pipe network water supply pipe, a secondary pipe network return pipe and a secondary pipe network bypass pipe. One end of the secondary pipe network return pipe is connected to the terminal heat dissipation device, and the other end is connected to the plate heat exchanger; one end of the secondary pipe network water supply pipe is connected to the terminal heat dissipation device, and the other end is connected to the plate heat exchanger; The heat storage pipe network includes a water tank circulation pump, a heat storage pipeline water supply pipe, a heat storage pipeline return pipe and a liquid level control device. One end of the insulated water tank is connected to the heat storage pipeline water supply pipe, and the other end is connected to the heat storage pipeline return pipe; the liquid level control device is installed in the insulated water tank, and the water tank circulation pump is installed on the heat storage pipeline water supply pipe; One end of the secondary pipe network bypass pipe is connected to the secondary pipe network return pipe, and the other end is connected to the secondary pipe network water supply pipe; The heat meter is arranged on the return pipe of the secondary network and is located between the connection point of the secondary network bypass pipe and the secondary network return pipe and the terminal heat dissipation device; the electric regulating valve is arranged on the secondary network bypass pipe; the terminal circulation pump is arranged on the return pipe of the secondary network and is located between the connection point of the secondary network bypass pipe and the secondary network return pipe and the terminal heat dissipation device.

[0008] Preferably, the insulated water tank is arranged in the primary pipe network, one end of the heat storage pipeline water supply pipe is connected to the insulated water tank, and the other end is connected to the primary pipe network return pipe; one end of the heat storage pipeline return pipe is connected to the insulated water tank, and the other end is connected to the primary pipe network water supply pipe.

[0009] Preferably, the primary pipe network circulation pump is located between the connection point of the primary pipe network return pipe and the heat storage pipeline water supply pipe and the heat source equipment.

[0010] Preferably, the insulated water tank is arranged in the secondary pipe network, one end of the heat storage pipeline water supply pipe is connected to the insulated water tank, and the other end is connected to the secondary pipe network return pipe; one end of the heat storage pipeline return pipe is connected to the insulated water tank, and the other end is connected to the secondary pipe network water supply pipe.

[0011] Preferably, the connection point of the heat storage pipeline return pipe and the secondary pipeline network water supply pipe is located between the connection point of the secondary pipeline network bypass pipe and the secondary pipeline network water supply pipe and the plate heat exchanger; the connection point of the heat storage pipeline supply pipe and the secondary pipeline network return pipe is located between the connection point of the secondary pipeline network bypass pipe and the secondary pipeline network return pipe and the plate heat exchanger.

[0012] Compared with the prior art, this application has the following advantages: 1. The present invention proposes an efficient and clean energy centralized heating energy storage system, which cleverly uses the abundant water resources in the primary pipe network and the insulated water tank as the core heat storage medium. During the off-peak period when electricity demand is low, the system actively stores heat; and during the peak period when electricity demand surges, it releases heat energy to achieve intelligent staggered operation of the heat source equipment. On the basis of only adding extremely limited investment costs, the heat source equipment can be completely shut down during the peak period, relying entirely on the heat energy accumulated during the off-peak period to provide a continuous and stable heat energy supply to the heating terminal. This design not only significantly reduces the overall operating cost of the heating system, but is also more conducive to energy conservation and emission reduction, and the implementation of the green development path, thereby achieving efficient and energy-saving operation of the heating system.

[0013] 2. This invention incorporates an electric control valve and heat meter on the secondary network side, enabling the system to accurately monitor temperature fluctuations in the secondary network return water in real time during the critical processes of valley power storage and peak power release. The system continuously compares the actual return water temperature with the target temperature and adjusts the opening and closing of the electric control valve accordingly, ensuring stable secondary network return water temperature. This mechanism effectively mitigates the potential impact of drastic temperature fluctuations in the primary network during heat storage and release periods, achieving a balance between the supply and demand sides of the heating system and facilitating its sustained and stable operation.

[0014] 3. This invention incorporates PLC automatic control, enabling coordinated control of the heat source equipment, water pump, and electric regulating valve. The system adjusts the opening of the electric regulating valve based on real-time data from outdoor temperature and secondary pipe network return water temperature, simultaneously adjusting the opening on the primary pipe network side and the volume on the secondary pipe network side. The system coordinates the coordinated and automatic control of various devices during energy storage and release based on actual peak and valley electricity levels, thereby enhancing the operation of the heating system and improving its efficiency and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of a clean energy centralized heating and energy storage system proposed by the present invention; Figure 2 This is a schematic diagram of the overall structure of the second embodiment of a clean energy centralized heating and energy storage system proposed by the present invention.

[0016] In the figure: 1. Terminal heat dissipation device; 2. Plate heat exchanger; 3. Heat source equipment; 4. Insulated water tank; 5. Terminal circulation pump; 6. Primary pipe network circulation pump; 7. Water tank circulation pump; 8. Electric regulating valve; 9. Heat meter; 10. Secondary pipe network water supply pipe; 11. Secondary pipe network return pipe; 12. Secondary pipe network bypass pipe; 13. Primary pipe network water supply pipe; 14. Primary pipe network return pipe; 15. Heat storage pipeline water supply pipe; 16. Heat storage pipeline return pipe; 17. Liquid level control device. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0019] The present invention is implemented by the following technical solutions: Reference Figure 1 , a clean energy centralized heating and energy storage system, comprising a terminal heat dissipation device 1, a plate heat exchanger 2, a heat source device 3, an insulated water tank 4, a primary pipe network, a secondary pipe network and a heat storage pipe network; The primary pipe network includes a primary pipe network circulation pump 6, a primary pipe network water supply pipe 13 and a primary pipe network return pipe 14. One end of the primary pipe network water supply pipe 13 is connected to the heat source equipment 3, and the other end is connected to the plate heat exchanger 2. One end of the primary pipe network return pipe 14 is connected to the heat source equipment 3, and the other end is connected to the plate heat exchanger 2. The heat source equipment 3, the primary pipe network water supply pipe 13, the plate heat exchanger 2 and the primary pipe network return pipe 14 constitute a primary pipe network water circuit circulation, and the order is heat source equipment 3 → primary pipe network water supply pipe 13 → plate heat exchanger 2 → primary pipe network return pipe 14 → heat source equipment 3, or heat source equipment 3 → primary pipe network return pipe 14 → plate heat exchanger 2 → primary pipe network water supply pipe 13 → heat source equipment 3.

[0020] The primary pipe network circulation pump 6 is arranged on the primary pipe network return pipe 14 and is located between the connection point of the primary pipe network return pipe 14 and the heat storage pipeline water supply pipe 15 and the heat source equipment 3.

[0021] The secondary network includes a terminal circulation pump 5, an electric regulating valve 8, a heat meter 9, a secondary network water supply pipe 10, a secondary network return pipe 11, and a secondary network bypass pipe 12. One end of the secondary network return pipe 11 is connected to the terminal heat sink 1, and the other end is connected to the plate heat exchanger 2. The secondary network water supply pipe 10 is connected to the terminal heat sink 1 at one end, and to the plate heat exchanger 2 at the other end. The order of flow is plate heat exchanger 2 → secondary network return pipe 11 → terminal heat sink 1 → secondary network bypass pipe 12 → plate heat exchanger 2, or alternatively, plate heat exchanger 2 → secondary network bypass pipe 12 → terminal heat sink 1 → secondary network return pipe 11 → plate heat exchanger 2. The terminal heat sink 1, secondary network water supply pipe 10, plate heat exchanger 2, and secondary network return pipe 11 constitute the secondary network water circuit.

[0022] The heat storage pipeline network includes a water tank circulation pump 7, a heat storage pipeline water supply pipe 15, a heat storage pipeline return pipe 16 and a liquid level control device 17. One end of the heat storage pipeline water supply pipe 15 is connected to the insulated water tank 4, and the other end is connected to the primary pipeline network return pipe 14; one end of the heat storage pipeline return pipe 16 is connected to the insulated water tank 4, and the other end is connected to the primary pipeline network water supply pipe 13.

[0023] The liquid level control device 17 is arranged in the thermal insulation water tank 4 .

[0024] One end of the secondary pipe network bypass pipe 12 is connected to the secondary pipe network return pipe 11, and the other end is connected to the secondary pipe network water supply pipe 10; Furthermore, the heat meter 9 is arranged on the secondary pipe network return pipe 11, and is located between the connection point of the secondary pipe network bypass pipe 12 and the secondary pipe network return pipe 11 and the terminal heat dissipation device 1; the electric regulating valve 8 is arranged on the secondary pipe network bypass pipe 12; the terminal circulation pump 5 is arranged on the secondary pipe network return pipe 11, and is located between the connection point of the secondary pipe network bypass pipe 12 and the secondary pipe network return pipe 11 and the terminal heat dissipation device 1.

[0025] The water tank circulation pump 7 is arranged on the heat storage pipeline water supply pipe 15 and is located between the connection point of the heat storage pipeline water supply pipe 15 and the primary pipe network return pipe 14 and the thermal insulation water tank 4.

[0026] Reference Figure 2 , a clean energy centralized heating and energy storage system, also has the following implementation mode, including a terminal heat dissipation device 1, a plate heat exchanger 2, a heat source device 3, an insulated water tank 4, a primary pipe network, a secondary pipe network and a heat storage pipe network; The primary pipe network includes a primary pipe network circulation pump 6, a primary pipe network water supply pipe 13 and a primary pipe network return pipe 14. One end of the primary pipe network water supply pipe 13 is connected to the heat source equipment 3, and the other end is connected to the plate heat exchanger 2. One end of the primary pipe network return pipe 14 is connected to the heat source equipment 3, and the other end is connected to the plate heat exchanger 2. The heat source equipment 3, the primary pipe network water supply pipe 13, the plate heat exchanger 2 and the primary pipe network return pipe 14 constitute a primary pipe network water circuit circulation, and the order is heat source equipment 3 → primary pipe network water supply pipe 13 → plate heat exchanger 2 → primary pipe network return pipe 14 → heat source equipment 3, or heat source equipment 3 → primary pipe network return pipe 14 → plate heat exchanger 2 → primary pipe network water supply pipe 13 → heat source equipment 3.

[0027] The primary pipe network circulation pump 6 is arranged on the primary pipe network return pipe 14 .

[0028] The secondary network includes a terminal circulation pump 5, an electric regulating valve 8, a heat meter 9, a secondary network water supply pipe 10, a secondary network return pipe 11, and a secondary network bypass pipe 12. One end of the secondary network return pipe 11 is connected to the terminal heat sink 1, and the other end is connected to the plate heat exchanger 2. The secondary network water supply pipe 10 is connected to the terminal heat sink 1 at one end, and to the plate heat exchanger 2 at the other end. The order of flow is plate heat exchanger 2 → secondary network return pipe 11 → terminal heat sink 1 → secondary network bypass pipe 12 → plate heat exchanger 2, or alternatively, plate heat exchanger 2 → secondary network bypass pipe 12 → terminal heat sink 1 → secondary network return pipe 11 → plate heat exchanger 2. The terminal heat sink 1, secondary network water supply pipe 10, plate heat exchanger 2, and secondary network return pipe 11 constitute the secondary network water circuit.

[0029] The heat storage pipeline network includes a water tank circulation pump 7, a heat storage pipeline water supply pipe 15, a heat storage pipeline return pipe 16 and a liquid level control device 17. One end of the heat storage pipeline water supply pipe 15 is connected to the insulated water tank 4, and the other end is connected to the secondary pipeline network return pipe 11; one end of the heat storage pipeline return pipe 16 is connected to the insulated water tank 4, and the other end is connected to the secondary pipeline network water supply pipe 10.

[0030] The liquid level control device 17 is arranged in the thermal insulation water tank 4 .

[0031] One end of the secondary pipe network bypass pipe 12 is connected to the secondary pipe network return pipe 11, and the other end is connected to the secondary pipe network water supply pipe 10; Furthermore, the connection point of the heat storage pipeline return pipe 16 and the secondary pipe network water supply pipe 10 is located between the connection point of the secondary pipe network bypass pipe 12 and the secondary pipe network water supply pipe 10 and the plate heat exchanger 2; the connection point of the heat storage pipeline supply pipe 15 and the secondary pipe network return pipe 11 is located between the connection point of the secondary pipe network bypass pipe 12 and the secondary pipe network return pipe 11 and the plate heat exchanger 2; The heat meter 9 is arranged on the secondary pipe network return pipe 11 and is located between the connection point of the secondary pipe network bypass pipe 12 and the secondary pipe network return pipe 11 and the terminal heat dissipation device 1; the electric regulating valve 8 is arranged on the secondary pipe network bypass pipe 12; the terminal circulation pump 5 is arranged on the secondary pipe network return pipe 11 and is located between the connection point of the secondary pipe network bypass pipe 12 and the secondary pipe network return pipe 11 and the terminal heat dissipation device 1.

[0032] The water tank circulation pump 7 is arranged on the heat storage pipeline water supply pipe 15 and is located between the connection point of the heat storage pipeline water supply pipe 15 and the secondary pipe network return pipe 11 and the thermal insulation water tank 4.

[0033] This invention fully utilizes the large water capacity of the centralized heating network. By installing an insulated water tank 4 on the primary network and combining it with constant-temperature bypass control of the secondary network, the water in the primary network and insulated water tank 4 is used as a heat storage medium. During off-peak hours, the energy station's heat source equipment 3 operates at full capacity, maximizing the water temperature in the primary network and insulated water tank 4. During peak hours, all heat source equipment 3 in the energy station is shut down, and heat is supplied solely to the terminal terminals from the heat of the water in the primary network and insulated water tank 4. Unlike traditional heating systems, this invention fully utilizes the heat storage capacity of the primary network, rather than relying solely on the insulated water tank 4 as a single energy storage unit.

[0034] The present invention jointly regulates the heat source equipment 3 with the primary heating pipe network, secondary pipe network, liquid level control of the insulated water tank 4, and constant temperature bypass control of the secondary pipe network, so as to realize heat storage and heat release of the primary pipe network and the insulated water tank 4 during peak and valley periods, control the staggered operation of the heat source equipment 3, and ensure stable heat supply at the terminal.

[0035] The operating principle of this application is as follows: ① Valley power thermal storage working conditions: During the off-peak period, the heat source equipment 3, the terminal circulation pump 5, the primary pipe network circulation pump 6, and the water tank circulation pump 7 are started and operated to maximize the primary pipe network temperature, that is, to maximize the temperature of the internal water channels of the primary pipe network circulation pump 6, the primary pipe network water supply pipe 13, and the primary pipe network return pipe 14, and to store heat using the water in the primary pipe network and the insulated water tank 4. At this time, the off-peak period can be utilized to the maximum extent to store heat.

[0036] At the same time, the electric regulating valve 8 automatically adjusts the opening size according to the return water temperature of the secondary pipe network in real time, so that the secondary pipe network temperature is not affected by the large fluctuations of the primary pipe network water temperature, maintaining the stability of the secondary pipe network heating supply.

[0037] The liquid level control device 17 monitors the liquid level in the thermal insulation water tank 4 to ensure that the thermal insulation water tank 4 will not overflow.

[0038] ②Peak power heat release condition: During peak power periods, the heat source equipment 3 stops working, and the terminal circulation pump 5, the primary pipe network circulation pump 6, and the water tank circulation pump 7 are in operation. Only the heat stored in the primary pipe network and the insulated water tank is used to supply heat to the terminal heat dissipation device 1. At this time, a large amount of heat energy stored during the off-peak power period is utilized.

[0039] At the same time, the electric regulating valve 8 automatically adjusts its opening in real time based on the secondary pipe network return water temperature, ensuring that the secondary pipe network temperature is not affected by large fluctuations in the primary pipe network water temperature, maintaining stable secondary pipe network heat supply. During peak electricity prices, the high-power heat source equipment in the heating system is shut down, and only the low-power water pump is running, saving significant operating costs while ensuring stable terminal heat supply.

[0040] 1. Water supply temperature setting During implementation, the present application is equipped with an outdoor temperature sensor, which detects the outdoor temperature Te and the return water temperature T1 every 30 minutes. The outdoor temperature Te and the return water temperature T1 can be detected by the outdoor temperature sensor every 30 minutes.

[0041] First, different time periods are set. Based on the time adjustment, the supply water temperature T2 can be adjusted in each time period based on the outdoor ambient temperature Te and the return water temperature T1: For example, if you set the time period, [00:00]-[05:35], [05:35]-[12:00]... On the basis of time adjustment, the supply water temperature T2 can be adjusted in each time period based on the outdoor ambient temperature Te and the return water temperature T1: T2=GT(Te,

-5℃

a1

a2

a3

a4

-5℃

b1

b2

b3

b4

[0042] Achieve the goal: Divide the control of water supply temperature into four areas, as shown in the following table: Ambient return water temperature -5℃ or above -5℃ or less Above 35℃ 1 2 Below 35℃ 3 4 ① The ambient temperature [-5°C] and above is a control curve, such as the fixed water supply temperature T2 = 43°C; ②Ambient temperature [-5℃] is a control curve as follows: T2=3Te 3 +2Te 2 +0.5Te+3 (℃); ③When the return water temperature is higher than [35℃], the supply water temperature is not affected by the return water temperature; ④ When the return water temperature is lower than [35℃], the supply water temperature T2 = T2 + [0.7] × ([35℃] - T1).

[0043] 2. Valve control Every day at [24:00], adjust the opening of electric control valve 8 to [50%].

[0044] (1) Temperature control (primary network heat storage process adjustment) (cooling process); through the temperature sensor, the secondary network water supply temperature T2 is monitored in real time.

[0045] Assume that the supply water temperature T2 calculated based on the ambient temperature and return water temperature is 43°C.

[0046] When the secondary network water supply temperature T2 ≥ 43℃ + [0.5℃] and lasts ≥ [30s]: Detect the opening of the electric regulating valve 8; If the opening of the electric regulating valve is ≤ [95%], the opening of the electric regulating valve 8 is controlled to increase, and the adjustment speed is controlled according to PID until the water supply temperature T2 is ≤ 43℃-[0.5℃] and lasts for ≥ [10s]. The electric regulating valve 8 stops moving. When the opening of the electric regulating valve 8 is greater than [95%], the adjustment is stopped, the secondary network water supply temperature T2 and the opening of the electric regulating valve 8 are detected, and the water supply temperature T2 range is re-determined; If the opening of electric regulating valve 8 is greater than [95%], detect the water pump current X——X∈([30A], [50A]), the water pump runs at the rated frequency, and continue to monitor the water supply temperature T2. If: T2≥43℃+[1℃], for [300s], then alarm [water supply temperature is too high], otherwise prompt [water pump runs at the rated frequency]; if: X∉([30A], [50A]), then alarm [water supply temperature is too high].

[0047] (2) Temperature control (regulation of the heat release process of the primary network) (heating process), real-time monitoring of the secondary network water supply temperature T2 (same as above, minimum interval problem).

[0048] When the secondary network water supply temperature T2 ≤ 43℃-【0.5℃】, and lasts for ≥【30s】: Detect the opening of the electric regulating valve 8; If the opening of the electric regulating valve 8 is ≥【5%】, the opening of the electric regulating valve 8 is controlled to decrease, and the adjustment speed is controlled according to PID until the water supply temperature T2 is ≥43℃+【0.5℃】, and lasts for ≥【10s】, and the electric regulating valve 8 stops operating. When the opening of the electric regulating valve 8 is less than【5%】, the adjustment is stopped, the secondary network water supply temperature T2 and the opening of the electric regulating valve 8 are detected, and the water supply temperature T2 range is re-determined; If the opening of electric regulating valve 8 is less than [5%], detect the water pump current X——X∈([30A], [50A]), the water pump runs at the rated frequency, detect the water supply temperature T2, if: T2≤43℃-[1℃], lasts for [300s], then alarm [water supply temperature is too low], otherwise prompt [water pump runs at the rated frequency]; if: X∉([30A], [50A]), then alarm [water supply temperature is too low], and the water pump runs at the lowest frequency.

[0049] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A clean energy centralized heating storage system, characterized in that: It includes a terminal heat dissipation device (1), a plate heat exchanger (2), a heat source device (3), an insulation water tank (4), a primary pipe network, a secondary pipe network and a heat storage pipe network; The primary pipe network includes a primary pipe network circulation pump (6), a primary pipe network water supply pipe (13) and a primary pipe network return pipe (14), one end of the primary pipe network water supply pipe (13) is connected to the heat source equipment (3), and the other end is connected to the plate heat exchanger (2), and one end of the primary pipe network return pipe (14) is connected to the heat source equipment (3), and the other end is connected to the plate heat exchanger (2); A primary pipe network circulation pump (6) is provided on a primary pipe network return pipe (14); The secondary pipe network includes a terminal circulation pump (5), an electric regulating valve (8), a heat meter (9), a secondary pipe network water supply pipe (10), a secondary pipe network return pipe (11) and a secondary pipe network bypass pipe (12). One end of the secondary pipe network return pipe (11) is connected to the terminal heat dissipation device (1), and the other end is connected to the plate heat exchanger (2); one end of the secondary pipe network water supply pipe (10) is connected to the terminal heat dissipation device (1), and the other end is connected to the plate heat exchanger (2); The heat storage pipe network includes a water tank circulation pump (7), a heat storage pipeline water supply pipe (15), a heat storage pipeline return pipe (16), and a liquid level control device (17); one end of the heat preservation water tank (4) is connected to the heat storage pipeline water supply pipe (15), and the other end is connected to the heat storage pipeline return pipe (16); the liquid level control device (17) is arranged in the heat preservation water tank (4), and the water tank circulation pump (7) is arranged on the heat storage pipeline water supply pipe (15); One end of the secondary pipe network bypass pipe (12) is connected to the secondary pipe network return pipe (11), and the other end is connected to the secondary pipe network water supply pipe (10); The heat meter (9) is arranged on the secondary pipe network return pipe (11) and is located between the connection point of the secondary pipe network bypass pipe (12) and the secondary pipe network return pipe (11) and the terminal heat dissipation device (1); the electric regulating valve (8) is arranged on the secondary pipe network bypass pipe (12); and the terminal circulation pump (5) is arranged on the secondary pipe network return pipe (11) and is located between the connection point of the secondary pipe network bypass pipe (12) and the secondary pipe network return pipe (11) and the terminal heat dissipation device (1).

2. A clean energy centralized heating and energy storage system according to claim 1, characterized in that: The heat-insulating water tank (4) is arranged in the primary pipe network; one end of the heat storage pipeline water supply pipe (15) is connected to the heat-insulating water tank (4), and the other end is connected to the primary pipe network return pipe (14); one end of the heat storage pipeline return pipe (16) is connected to the heat-insulating water tank (4), and the other end is connected to the primary pipe network water supply pipe (13).

3. A clean energy centralized heating and energy storage system according to claim 2, characterized in that: The primary pipe network circulation pump (6) is located between the connection point of the primary pipe network return pipe (14) and the heat storage pipeline water supply pipe (15) and the heat source equipment (3).

4. A clean energy centralized heating and energy storage system according to claim 1, characterized in that: The heat-insulating water tank (4) is arranged in the secondary pipe network; one end of the heat storage pipeline water supply pipe (15) is connected to the heat-insulating water tank (4), and the other end is connected to the secondary pipe network return pipe (11); one end of the heat storage pipeline return pipe (16) is connected to the heat-insulating water tank (4), and the other end is connected to the secondary pipe network water supply pipe (10).

5. A clean energy centralized heating and energy storage system according to claim 4, characterized in that: The connection point between the heat storage pipeline return pipe (16) and the secondary pipeline network water supply pipe (10) is located between the connection point between the secondary pipeline network bypass pipe (12) and the secondary pipeline network water supply pipe (10) and the plate heat exchanger (2); and the connection point between the heat storage pipeline supply pipe (15) and the secondary pipeline network return pipe (11) is located between the connection point between the secondary pipeline network bypass pipe (12) and the secondary pipeline network return pipe (11) and the plate heat exchanger (2).

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