Thermoelectric decoupling heat supply system and method based on solar heat collection and long-distance pipeline heat storage

Abstract

The invention relates to the field of remote heat supply. A heat supply system based on solar heat collection and long-distance pipeline heat storage thermoelectricity decoupling is characterized by comprising a solar heat collector, a traditional heat source, a long-distance pipeline, a heat supply initial station, a pressure isolation station, a primary heat supply network and an intelligent control system, and the heat supply initial station supplies hot water to the pressure isolation station through a long-distance heat supply network of the long-distance pipeline; the heat insulation station returns water to the heat supply initial station through a long-conveying heat return pipe network of a long-conveying pipeline and supplies hot water to heat consumers through a primary pipe network water supply pipe, the heat consumers return water to the heat insulation station through a primary pipe network water return pipe, and the heat supply initial station returns water to a traditional heat source through a traditional heat source water return pipe. A traditional heat source supplies hot water to a heat supply initial station through a traditional heat source water supply pipe, a solar heat collector supplies hot water to the traditional heat source through a solar heat collector water supply pipe, and the traditional heat source returns water to the solar heat collector through a solar heat collector water return pipe. The heat supply mode can be automatically optimized according to different climate conditions and user requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of remote heating. BACKGROUND

[0002] With the acceleration of urbanization in China, the scale of urban central heating systems is continuously expanding, and the demand for heat and power decoupling technology is increasingly urgent. Traditional cogeneration units operate in a "heat-to-power" mode, and their electric-thermal coupling characteristics limit the flexibility of the power system, especially during periods of high renewable energy generation such as wind and solar power. This leads to a serious "curtailment of wind" and "curtailment of light" phenomenon. This problem is particularly pronounced in northern regions, especially during the winter heating period, where heat and power coupling severely limits the peak shaving capacity of heating-type thermal power units, hindering the efficient use of renewable energy.

[0003] Solar energy, as an important clean energy, has great potential in the field of heating. However, the intermittent nature of solar heating systems requires effective thermal energy management and storage solutions. Combining solar thermal technology with the heat storage characteristics of long-distance pipelines provides a new approach to the effective use of solar energy as a supplemental heat source for central heating systems. Long-distance pipelines exhibit high heat storage potential due to their simple structure, strong control ability, and large water capacity. By storing excess heat during periods of abundant solar energy and releasing stored heat during periods of insufficient solar energy or high heating demand, the system can effectively balance heating demand, reduce dependence on traditional heat sources, and improve energy utilization efficiency and the stability of the heating system.

[0004] However, existing technologies mainly focus on static heat storage techniques, lacking a dynamic heat storage and release management system that can adjust according to solar energy supply conditions and user demand. In the absence of solar energy as a supplemental heat source, the limitations of traditional heat source (thermal power plant) peak shaving capacity are more apparent, especially during periods of high renewable energy generation. Due to the inability of thermal power plants to flexibly adjust their heat load, renewable energy is wasted. Conversely, when solar energy is used as a supplemental heat source, not only can the peak shaving capacity of thermal power plants be improved, but heat and power decoupling can also be achieved, leading to better utilization of renewable energy and improved overall system operation efficiency and economic performance. SUMMARY

[0005] The technical problem addressed by the present application is how to utilize solar energy and long-distance pipelines for supplemental and stored heat, while meeting winter heating requirements and reducing the energy consumption of traditional heat sources (in this application, it refers to heating hot water heating devices such as coal-fired boilers, etc.).

[0006] The technical scheme adopted by the present application is: a heat supply system based on solar heat collection and long-distance pipeline heat storage heat-electricity decoupling, comprising a solar heat collector (1), a traditional heat source (such as a coal-fired or gas-fired boiler) (2), a long-distance pipeline (with heat storage function) (4), a heat supply first station, a pressure isolation station, a primary heat network, an intelligent control system (monitoring the output of the solar heat collector and the traditional heat source) (7), the heat supply first station supplies hot water to the heat insulation station through the long-distance heat supply pipe network of the long-distance pipeline (with heat storage function) (4), the heat insulation station returns water to the heat supply first station through the long-distance heat return pipe network of the long-distance pipeline (with heat storage function) (4), the heat insulation station supplies hot water to heat users through the primary pipe network water supply pipe, the heat users return water to the heat insulation station through the primary pipe network return water pipe, the heat supply first station returns water to the traditional heat source (such as a coal-fired or gas-fired boiler) through the traditional heat source return water pipe, the traditional heat source (such as a coal-fired or gas-fired boiler) supplies hot water to the heat supply first station through the traditional heat source water supply pipe, the solar heat collector (1) supplies hot water to the traditional heat source through the solar heat collector water supply pipe, the traditional heat source (such as a coal-fired or gas-fired boiler) (2) returns water to the solar heat collector (1) through the solar heat collector return water pipe, a first regulating valve V1 (3) is installed on the solar heat collector return water pipe, the long-distance heat return pipe network and the long-distance heat supply pipe network are connected at the pressure isolation station end through a second regulating valve V2 (controlling the amount of hot water entering the long-distance pipeline and the zero-time supply-return water communication pipe network valve) (5), a third regulating valve V3 (controlling the release of heat stored in the long-distance pipeline and the primary side valve of the heat exchanger) (6) is installed on the primary pipe network water supply pipe, a fourth regulating valve V4 (for compensating for the heat when solar energy is insufficient) (9) is installed on the solar heat collector water supply pipe, a first water pump P1 (controlling water flow speed) (8) and a fourth regulating valve are installed on the primary pipe network return water pipe, a second water pump P2 (controlling power plant circulation flow) (10) is installed at the heat supply first station end of the long-distance heat supply pipe network, a frequency converter is installed on the second water pump (10), the first regulating valve V1 (3), the second regulating valve V2, the third regulating valve V3 (6), the fourth regulating valve V4 (9), the first water pump P1 (8), the second water pump P2 (10) are electrically connected to the intelligent control system (7).

[0007] The pipeline of the long-distance pipeline is a sandwich pipeline, the inner wall of the sandwich pipeline is made of heat-conducting material, and the sandwich is filled with phase change heat storage material.

[0008] A heat supply method based on a solar heat collection and long-distance pipeline heat storage heat-electricity decoupling heat supply system, which is performed according to the following steps Step one, the solar heat collector absorbs solar energy and converts it into heat energy, then transmits the heat energy to the traditional heat source through the solar heat collector water supply pipe, adjusts the energy consumption of the traditional heat source according to the situation of the solar heat collector absorbing solar energy, when the solar heat collector cannot absorb solar energy or the solar energy converted into heat energy cannot heat the traditional heat source, adjusts the flow in the solar heat collector water supply pipe to the minimum flow through the first regulating valve V1 (3). Step two, when the heat received by the heat insulation station through the long-distance heat return pipe network is greater than the heat output by the heat insulation station, open the second regulating valve V2 to make the heat received by the heat insulation station equal to the heat output by the heat insulation station, and return the excess heat to the traditional heat source through the long-distance heat return pipe network to reduce the energy consumption of the traditional heat source; Step three, when the adjustment of the second regulating valve V2 cannot satisfy the heat received by the heat insulation station equal to the heat output by the heat insulation station, adjust the primary pipe network water supply pipe flow through the third regulating valve V3, thereby reducing the long-distance heat return pipe network flow, so that the heat received by the heat insulation station is equal to the heat output by the heat insulation station; Step four, when the adjustment of the second regulating valve V2 and the third regulating valve V3 cannot satisfy the heat received by the heat insulation station equal to the heat output by the heat insulation station, adjust the power of the first water pump P1 (8) through the frequency converter to reduce the primary heat network flow; Step five, when the above adjustments cannot satisfy the heat received by the heat insulation station equal to the heat output by the heat insulation station, reduce the power of the second water pump P2 (10) through the frequency converter.

[0009] The heat received by the heat insulation station equal to the heat output by the heat insulation station is determined by whether the water temperature of the long-distance heat return pipe network at the heat insulation station and the water temperature of the primary pipe network return pipe match, when the water temperature of the long-distance heat return pipe network at the heat insulation station is within the set temperature range of the long-distance heat return pipe network, and the water temperature of the primary pipe network return pipe at the heat insulation station is within the set temperature range of the primary pipe network return pipe, it means that the heat received by the heat insulation station is equal to the heat output by the heat insulation station, otherwise it means that the heat received by the heat insulation station is not equal to the heat output by the heat insulation station.

[0010] When two or more of the second regulating valve V2, the third regulating valve V3 (6), the fourth regulating valve V4 (9), the first water pump P1 (8), and the second water pump P2 (10) are adjusted, the adjustments are coordinated to meet the adjustment requirements while maintaining a safety margin, which means that the second regulating valve V2, the third regulating valve V3 (6), the fourth regulating valve V4 (9), the first water pump P1 (8), and the second water pump P2 (10) operate within the nearest adjustment range.

[0011] The application has the following advantages: The application realizes efficient operation and stability of the heating system by innovative application of solar heat collection and long-distance pipeline heat storage technology and dynamic heat management strategy. The core of the application is to collect heat energy by using a solar collector when the sunlight is sufficient, and to dynamically adjust the storage and release of heat energy through a long-distance pipeline. When solar energy is sufficient, excess heat energy is stored; when solar energy is insufficient or during a high heat demand period, heat energy is released to balance the heating demand, reduce dependence on traditional heat sources, and improve the flexibility and economy of the heating system. By optimizing the heat storage and release mode of the long-distance pipeline, such as temperature-raising heat storage or flow-increasing heat storage, the effect of heat decoupling is achieved, thereby improving the flexibility and economy of the heating system. In addition, the application also utilizes the heat storage capacity of the long-distance pipeline to realize cross-period use of heat energy, thereby improving the flexibility and economy of the heating system.

[0012] The application utilizes temperature-raising heat storage design and flow-increasing heat storage design of the long-distance pipeline to realize intelligent and dynamic interaction between the heating system and the solar collector. When the heat generated by the solar collector exceeds the current demand, the excess heat is used to raise the temperature of the heat medium in the pipeline or increase the flow of the conveying medium, thereby realizing heat storage. This method is more flexible than traditional single heat storage mode and can more accurately respond to changes in heating demand to provide immediate heat scheduling response. At the same time, the application also coordinates the application of traditional heat sources and solar supplemental heat sources, so that when solar energy is insufficient, traditional heat sources can supplement heating to ensure the continuity and stability of the heating system.

[0013] Compared with traditional heat accumulators, the application uses an optimized long-distance pipeline as a heat storage device to store excess heat energy when solar energy is sufficient and release heat energy during periods of insufficient solar energy or high heat demand. This method not only improves the heat energy management efficiency of the system, but also effectively balances the heating demand in scenarios of rapid solar charging and high load output, avoiding service interruptions due to insufficient heat sources. In particular, when solar energy cannot meet the demand, traditional heat sources can seamlessly access to ensure heating quality.

[0014] By integrating various sensors (such as temperature, pressure, flow, etc.) and intelligent control algorithms (such as fuzzy logic control, neural network control, or adaptive control), the application can form a dynamic heat scheduling between the solar collector and the heating system. This active adjustment is superior to static heat management design and can dynamically adjust the storage and release of heat energy according to actual heating demand, thereby optimizing the performance of the heating system. Moreover, the system can automatically adjust the cooperation ratio between the traditional heat source and the solar energy according to the availability of the traditional heat source and the fluctuation of the solar energy, further improving the flexibility of the system.

[0015] The present application realizes the adaptive adjustment of heating strategy through the intelligent thermal energy scheduling control system. The system can automatically optimize the heating mode according to different climate conditions and user demands, and compared with the fixed mode heating system, the present application shows higher flexibility and economy. At the same time, the system can also dynamically adjust the start-up time of the solar collector according to the load condition of the traditional heat source, realizing the optimal energy allocation.

[0016] By integrating key components such as temperature-raising heat storage design, flow-increasing heat storage design, and intelligent thermal energy scheduling control system, the present application reduces the demand for additional equipment, simplifies the system structure, reduces the construction and maintenance costs, and improves the economic feasibility of the heating system. In addition, due to the full consideration of the coordinated application of traditional heat sources and solar heat sources in the system design, the operation of the overall system is more efficient and economical. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural diagram of the system of the present application; Among them, 1. Solar collector, 2. Traditional heat source, 3. First regulating valve V1, 4. Long pipeline, 5. Second regulating valve V2, 6. Third regulating valve V3, 7. Intelligent control system, 8. First water pump P1, 9. Fourth regulating valve V4, 10. Second water pump P2. DETAILED DESCRIPTION

[0018] As Figure 1As shown, a solar heat collection and long-distance pipeline heat storage heat decoupling heating system includes a solar heat collector 1, a traditional heat source (such as a coal or gas boiler) 2, a long-distance pipeline (with heat storage function) 4, a heating first station, a pressure isolation station, a primary heat network, and an intelligent control system (monitoring the output of the solar heat collector and the traditional heat source) 7. The solar heat collector is a device that converts solar radiation into heat energy and belongs to the prior art. The solar heat collector 1 in the present application is a solar water heater, and the traditional heat source 2 is a heat boiler that uses one of gas, coal, or electricity for heating, also belonging to the prior art. The pipelines of the long-distance pipeline are pipelines with heat storage function. The heating first station is the core hub of the central heating system, mainly responsible for heat source conversion, heat distribution, and pipe network regulation and control. Through the heat exchanger, the steam or high-temperature water of the power plant or waste heat source is converted into suitable secondary heat network hot water, completing the heat exchange process of "steam-water" or "high-temperature water-low-temperature water". As the heat medium preparation and delivery center of the heat network, it undertakes tasks such as heat distribution, pressure regulation, and water quality control, ensuring the smooth operation of the pipe network, and belongs to the prior art. The pressure isolation station is a key facility in the central heating, water supply, and other systems, mainly used to balance the medium transmission pressure between different pressure areas, ensuring the safe operation of the pipe network, and realizing efficient energy transfer between the heat source and the user end. Through the plate heat exchanger and other equipment, the pressure difference between the primary network and the secondary network is isolated to prevent high-pressure impact damage to the user end pipe network. The heat exchange process of high-temperature hot water or steam and low-temperature medium is completed to improve the delivery efficiency. For example, the Zhengzhou Qifu pressure isolation station optimizes heat distribution by reducing the return water temperature of the primary network. It includes heat exchangers (plate / tube and shell type): core devices for heat exchange, avoiding mixing of media on both sides through pressure isolation design, circulating pumps and valves: adjusting flow and pressure, intelligent monitoring system: integrating sensors and PLC control modules, real-time acquisition of temperature, pressure, and other parameters and remote control.

[0019] The long-distance pipeline (with heat storage function) 4 includes a long-distance heating pipe network and a long-distance heat return pipe network. The heating first station supplies hot water to the heat insulation station through the long-distance heating pipe network of the long-distance pipeline (with heat storage function) 4, and the heat insulation station returns water to the heating first station through the long-distance heat return pipe network of the long-distance pipeline (with heat storage function) 4. The long-distance heating pipe network of the long-distance pipeline has heat storage function, and the long-distance heat return pipe network of the long-distance pipeline has no requirements. When the internal hot water temperature of the long-distance heating pipe network exceeds the phase change point of the phase change material of the long-distance heating pipe network, the long-distance heating pipe network absorbs and stores heat. When the internal hot water temperature of the long-distance heating pipe network is lower than the phase change point of the phase change material of the long-distance heating pipe network, the long-distance heating pipe network releases and stores heat.

[0020] The heat insulation station supplies hot water to the heat user through the primary pipe network water supply pipe, the heat user returns water to the heat insulation station through the primary pipe network return pipe, the heat supply first station returns water to the traditional heat source (such as a coal or gas boiler) through the traditional heat source return pipe, the traditional heat source (such as a coal or gas boiler) supplies hot water to the heat supply first station through the traditional heat source water supply pipe, the solar collector 1 supplies hot water to the traditional heat source through the solar collector water supply pipe, the traditional heat source (such as a coal or gas boiler) 2 returns water to the solar collector 1 through the solar collector return pipe, the first regulating valve V1 is installed on the solar collector return pipe, the long-distance heat return pipe network and the long-distance heat supply pipe network are connected at the pressure isolation station end through the second regulating valve V2 (controlling the hot water amount entering the long-distance pipe line and the zero-time supply-return water communication pipe network valve), the third regulating valve V3 (controlling the release of the heat stored in the long-distance pipe line and the heat exchanger primary side valve) is installed on the primary pipe network water supply pipe, the fourth regulating valve V4 (used for compensating the heat when the solar energy is insufficient) is installed on the solar collector water supply pipe, the first water pump P1 (controlling the water flow speed) and the fourth regulating valve are installed on the primary pipe network return pipe, the second water pump P2 (controlling the power plant circulation flow) is installed at the heat supply first station end of the long-distance heat supply pipe network, the frequency converter is installed on the second water pump 10, and the first regulating valve V1, the second regulating valve V2, the third regulating valve V3, the fourth regulating valve V4, the first water pump P1 and the second water pump P2 are electrically connected to the intelligent control system.

[0021] The pipe of the long-distance pipe line is a sandwich pipe, the inner wall of the sandwich pipe is made of heat-conducting material, and the sandwich pipe is filled with phase change heat storage material.

[0022] A heat supply method based on a solar collector heat storage and long-distance pipe line heat storage heat supply system, which is performed according to the following steps Step one, the solar collector absorbs solar energy and converts it into heat energy, then transmits the heat energy to the traditional heat source through the solar collector water supply pipe, adjusts the energy consumption of the traditional heat source according to the situation of the solar collector absorbing solar energy, and when the solar collector cannot absorb solar energy or the solar energy converted into heat energy cannot heat the traditional heat source, adjusts the flow in the solar collector water supply pipe to be the minimum flow through the first regulating valve V1; Step two, when the heat received by the heat insulation station through the long-distance heat return pipe network is greater than the heat output by the heat insulation station, the second regulating valve V2 is opened to make the heat received by the heat insulation station equal to the heat output by the heat insulation station, and the excess heat is returned to the traditional heat source through the long-distance heat return pipe network to reduce the energy consumption of the traditional heat source; Step three, when the adjustment of the second regulating valve V2 cannot satisfy the condition that the heat received by the heat insulation station is equal to the heat output by the heat insulation station, the flow of the primary pipe network water supply pipe is adjusted through the third regulating valve V3, so that the flow of the long-distance heat return pipe network is reduced, and the heat received by the heat insulation station is equal to the heat output by the heat insulation station; Step four, when the adjustment of the second regulating valve V2 and the third regulating valve V3 cannot satisfy the heat received by the heat insulation station equal to the heat output by the heat insulation station, the power of the first water pump P1 is adjusted by the frequency converter to reduce the primary heat network flow; Step five, when the above adjustment cannot satisfy the heat received by the heat insulation station equal to the heat output by the heat insulation station, the power of the second water pump P2 is reduced by the frequency converter.

[0023] The heat received by the heat insulation station equal to the heat output by the heat insulation station is determined by whether the water temperature of the long-distance heat pipe network at the heat insulation station and the water temperature of the primary pipe network backwater pipe match, when the water temperature of the long-distance heat pipe network at the heat insulation station is in the long-distance heat pipe network set temperature range, and the water temperature of the primary pipe network backwater pipe at the heat insulation station is in the primary pipe network backwater pipe set temperature range, it is indicated that the heat received by the heat insulation station is equal to the heat output by the heat insulation station, otherwise it is indicated that the heat received by the heat insulation station is not equal to the heat output by the heat insulation station.

[0024] When two or more of the second regulating valve V2, the third regulating valve V3, the fourth regulating valve V4, the first water pump P1 and the second water pump P2 are adjusted, the adjustment is coordinated to meet the adjustment requirement while maintaining a safety margin, the safety margin refers to that the second regulating valve V2, the third regulating valve V3, the fourth regulating valve V4, the first water pump P1 and the second water pump P2 operate in the nearest adjustment range.

[0025] The application will be described in detail below with reference to the accompanying drawings. Figure 1

[0026] System initialization: when the system starts, the solar collector and the traditional heat source are in standby state.

[0027] Solar collector response: when the solar radiation intensity is high enough, the solar collector absorbs solar energy and converts it into heat energy. At this time, if the traditional heat source meets the heating demand, the use of solar energy is reduced. The first regulating valve V1 adjusts the fluid flow entering the solar collector according to the change of the heating demand.

[0028] The long-distance pipeline heat storage implementation scheme includes the following two implementation modes of pressure insulation station regulating heat storage and power plant regulating heat storage: (1) Pressure insulation station regulating heat storage mode 1) Pressure insulation station regulating valve opening degree: when the heat generated by the solar collector exceeds the demand, the excess heat is returned to the long-distance pipeline backwater main pipe by adjusting the opening degree of the zero-order supply and return water communication pipe network valve (second regulating valve V2) in the pressure insulation station, etc. Heat storage is realized. If the valve has good regulating performance, the heat output by the pressure insulation station to the primary network can be reduced by adjusting the opening degree, so that the backwater temperature is increased, and heat storage is realized.

[0029] ​2) Regulating the primary side valve of the heat exchanger: If the above method is not feasible, the opening of the third valve V3 on the primary side of the heat exchanger can be adjusted to reduce the heat output from the pressure separation station to the primary network, and the heat storage can still be achieved.

[0030] 3) Reducing the circulation flow of the primary pipe network: When the first two methods are not feasible, the circulation flow of the primary network can be appropriately reduced, controlled by the first water pump P1, but this may affect the heating effect of the end users and may cause the hydraulic balance of the networked heating area to be destroyed.

[0031] (2) Regulating the heat storage mode by the power plant When the solar energy is sufficient, the excess heat can be stored by adjusting the circulation flow of the power plant. Specifically, when the solar energy is sufficient, the circulation flow is reduced by reducing the speed of the second water pump P2, so that the supply water temperature rises to achieve heat storage. When the user demand is high at night, the circulation flow is gradually increased, controlled by the second pump P2, to release the stored heat.

[0032] Temperature regulation: The system continuously monitors the output of the solar collector and the traditional heat source through the intelligent control system to ensure that the water temperature delivered to the user's home remains within the set range. In addition, the water flow rate is controlled by the first water pump P1 to ensure uniform distribution of heat. At the same time, in order to ensure that the water temperature in the long-distance pipeline does not exceed the upper limit, a safety margin should be considered in the design. Generally, the upper limit of the design temperature of the long-distance pipeline is 130°C, and the upper limit of the return water temperature is 70°C. Therefore, during heat storage, the supply and return water temperatures should be controlled within the safety range, usually 125°C / 65°C, with a certain safety margin (about 3-5°C).

Claims

1. A decoupled thermoelectric heating system based on solar thermal collection and long-distance pipeline thermal storage, characterized in that: The application relates to a solar energy collector (1), a traditional heat source (2), a long-distance pipeline (4), a heat supply first station, a pressure isolation station, a primary heat network and an intelligent control system (7), wherein the heat supply first station supplies hot water to the pressure isolation station through a long-distance heat supply pipe network of the long-distance pipeline (4), the pressure isolation station returns water to the heat supply first station through a long-distance heat return pipe network of the long-distance pipeline (4), the pressure isolation station supplies hot water to a heat user through a primary pipe network water supply pipe, the heat user returns water to the pressure isolation station through a primary pipe network return water pipe, the heat supply first station returns water to the traditional heat source through a traditional heat source return water pipe, the traditional heat source supplies hot water to the heat supply first station through a traditional heat source water supply pipe, the solar energy collector (1) supplies hot water to the traditional heat source through a solar energy collector water supply pipe, the traditional heat source (2) returns water to the solar energy collector (1) through a solar energy collector return water pipe, a first regulating valve V1 (3) is arranged on the solar energy collector return water pipe, the long-distance heat return pipe network and the long-distance heat supply pipe network are connected at the pressure isolation station end through a second regulating valve V2 (5), a third regulating valve V3 (6) is arranged on the primary pipe network water supply pipe, a fourth regulating valve V4 (9) is arranged on the solar energy collector water supply pipe, a first water pump P1 (8) and the fourth regulating valve are arranged on the primary pipe network return water pipe, a second water pump P2 (10) is arranged at the heat supply first station end of the long-distance heat supply pipe network, a frequency converter is arranged on the second water pump (10), the first regulating valve V1 (3), the second regulating valve V2, the third regulating valve V3 (6), the fourth regulating valve V4 (9), the first water pump P1 (8) and the second water pump P2 (10) are electrically connected with the intelligent control system (7).

2. The system according to claim 1, wherein the system is characterized in that: The pipeline of the long-distance pipeline is a sandwich pipeline, the inner wall of the sandwich pipeline is made of heat-conducting material, and the sandwich is filled with phase change heat storage material.

3. The method of claim 1, wherein the heat supply system is a solar heat collection and long-distance pipeline heat storage heat supply system. The following steps are carried out Step one: the solar energy collector absorbs solar energy and converts the solar energy into heat energy, then the heat energy is transmitted to the traditional heat source through the solar energy collector water supply pipe, the energy consumption of the traditional heat source is adjusted according to the condition of the solar energy collector absorbing solar energy, when the solar energy collector cannot absorb solar energy or the solar energy converted into heat energy cannot heat the traditional heat source, the flow in the solar energy collector water supply pipe is adjusted to the minimum flow through the first regulating valve V1 (3); Step two: when the heat received by the pressure isolation station through the long-distance heat return pipe network is greater than the heat output by the pressure isolation station, the second regulating valve V2 is opened to make the heat received by the pressure isolation station equal to the heat output by the pressure isolation station, and the excess heat is returned to the traditional heat source through the long-distance heat return pipe network to reduce the energy consumption of the traditional heat source; Step three: when the adjustment of the second regulating valve V2 cannot satisfy the condition that the heat received by the pressure isolation station is equal to the heat output by the pressure isolation station, the flow of the primary pipe network water supply pipe is adjusted through the third regulating valve V3, so that the flow of the long-distance heat return pipe network is reduced, and the heat received by the pressure isolation station is equal to the heat output by the pressure isolation station; Step four: when the adjustment of the second regulating valve V2 and the third regulating valve V3 cannot satisfy the condition that the heat received by the pressure isolation station is equal to the heat output by the pressure isolation station, the power of the first water pump P1 (8) is adjusted through the frequency converter, and the flow of the primary heat network is reduced. Step five, when the above adjustment can not meet the heat received by the heat insulation station equal to the heat output by the heat insulation station, the power of the second water pump P2 (10) is reduced by the frequency converter.

4. The heating method based on the solar heat collection and long-distance pipeline heat storage heat decoupling heating system according to claim 3, characterized in that: The heat received by the heat insulation station equal to the heat output by the heat insulation station is determined by whether the water temperature of the long-distance heat pipe network at the heat insulation station and the water temperature of the primary pipe network return water pipe match, when the water temperature of the long-distance heat pipe network at the heat insulation station is in the set temperature range of the long-distance heat pipe network, and the water temperature of the primary pipe network return water pipe at the heat insulation station is in the set temperature range of the primary pipe network return water pipe, it is proved that the heat received by the heat insulation station equal to the heat output by the heat insulation station, otherwise it is proved that the heat received by the heat insulation station is not equal to the heat output by the heat insulation station.

5. The heating method based on the solar heat collection and long-distance pipeline heat storage heat decoupling heating system according to claim 4, characterized in that: When two or more than two of the second regulating valve V2, the third regulating valve V3 (6), the fourth regulating valve V4 (9), the first water pump P1 (8), the second water pump P2 (10) are adjusted, the adjustment is coordinated to meet the adjustment requirements while keeping a safety margin, the safety margin refers to the second regulating valve V2, the third regulating valve V3 (6), the fourth regulating valve V4 (9), the first water pump P1 (8), the second water pump P2 (10) run in the nearest adjustment range.

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