Heat network water operation regulating device and regulating method of heat storage water tank combined with electric boiler

Abstract

This invention relates to the field of energy storage technology, specifically to a device and method for regulating the operation of a combined hot water storage tank and an electric boiler in a heating network. The device comprises: a hot water storage tank; an electric boiler system, wherein during direct heating, the inlet is connected to the outlet of the primary heating station's circulating pump, and the outlet is connected to the plant's heating network supply pipe; during heat storage in the electric boiler system, the cold water interface of the hot water storage tank is connected to the electric boiler system, and the hot water interface of the hot water storage tank is also connected to the electric boiler system; or, during heat storage, the outlet of the primary heating station's circulating pump and the plant's heating network supply pipe are connected to the hot water interface of the hot water storage tank, and the cold water interface of the hot water storage tank is connected to the plant's heating network return pipe; during heat release, the hot water interface of the hot water storage tank is connected to the outlet of the primary heating station's circulating pump, and the cold water interface of the hot water storage tank is connected to the plant's heating network return pipe. This invention solves the problem of insufficient heating supply in existing regulating devices when actual heat demand fluctuates significantly.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, specifically to a device and method for regulating the operation of a combined hot water storage tank and an electric boiler in a heating network. Background Technology

[0002] High-pressure electric boilers and hot water storage tanks, as a simple, low-investment, and minimally invasive energy storage technology, have been widely used in combined heat and power (CHP) units. In these systems, the adjustment of the power plant's heat load rate is achieved through the hot water storage tank in conjunction with the high-pressure electric boiler and the existing primary heating station. However, the existing systems only offer three operating modes: direct heating from the electric boiler, heating from the electric boiler and then storing heat in the hot water tank, and heat release from the hot water tank. This results in insufficient heating when actual heat demand fluctuates significantly, failing to meet actual needs. Summary of the Invention

[0003] This invention provides a heating network water operation regulation device and method for a combined hot water storage tank and electric boiler, in order to solve the problem that existing regulation devices are insufficient in heating supply and cannot meet actual needs when the actual heat demand fluctuates greatly.

[0004] On one hand, the present invention provides a heating network water operation regulation device for a combined hot water storage tank and electric boiler, comprising: A hot water storage tank has a hot water receiving chamber, a cold water receiving chamber, a hot water interface, and a cold water interface. The hot water interface is connected to the hot water receiving chamber, and the cold water interface is connected to the cold water receiving chamber. The electric boiler has its inlet connected to the hot-side outlet of the heat exchanger, and its outlet connected to the hot-side inlet of the heat exchanger. The heat exchanger has its cold side outlet connected to the plant's heating network water supply pipe or the hot water interface of the hot water storage tank, and its cold side inlet connected to the outlet of the heating network circulation pump at the first heating station or the cold water interface of the hot water storage tank. When the electric boiler provides direct heating, the electric boiler is connected to the outlet of the heating network circulation pump of the first heating station through the cold side inlet of the heat exchanger, and connected to the water supply pipe of the heating network in the plant area through the cold side outlet of the heat exchanger. When the electric boiler is used for heating and heat storage, the cold water interface of the hot water storage tank is connected to the electric boiler through the cold side inlet of the heat exchanger, and the hot water interface of the hot water storage tank is connected to the electric boiler through the cold side outlet of the heat exchanger. Alternatively, during heat storage, after the outlet of the heating network circulation pump of the first heating station and the outlet of the heating network water supply pipe in the plant area are connected, they are connected to the hot water interface of the hot water storage tank, and the cold water interface of the hot water storage tank is connected to the return water pipe of the heating network in the plant area. When releasing heat, the hot water interface of the hot water storage tank is connected to the outlet of the heating network circulation pump of the first heating station. After mixing with the return water of the heating network and reheating, it is delivered to the heating network water supply pipe in the plant area. The cold water interface of the hot water storage tank is connected to the return water pipeline of the heating network in the plant area.

[0005] Beneficial effects: This invention achieves flexible adjustment of four operating conditions through a set of heating network pipeline systems: direct heating by electric boilers, heating by electric boilers for hot water storage tanks, heating by the plant's heating network for hot water storage tanks, and heat release from the hot water storage tanks. This satisfies the need for the plant's heating network water supply pipes to directly supply hot water to the hot water storage tanks after cooling the return water from the outlet of the heating network circulation pump at the first heating station when the heat demand fluctuates greatly, thereby maximizing energy utilization. The entire system has a simple structure and low cost.

[0006] In one optional implementation, the outlet of the heating network circulation pump at the primary heating station is provided with a first pipeline, and the outlet of the plant area heating network water supply pipe is provided with a second pipeline. The first and second pipelines are connected in parallel and then connected in series with a third pipeline. The other end of the third pipeline is connected to the hot water interface of the hot water storage tank. A fourth pipeline is provided between the cold water interface of the hot water storage tank and the return water pipe of the plant area heating network. Both the second and fourth pipelines are equipped with regulating valves.

[0007] The heating network circulation pump at the primary heating station, the water supply pipe of the heating network in the plant area, the return water pipe of the heating network in the plant area, and the hot water storage tank are connected by multiple pipelines. Different pipeline connections can be achieved by adjusting the regulating valve, which saves the number of pipelines and further reduces costs. Moreover, the heat storage speed and heat storage time can be adjusted by adjusting the opening of the regulating valve, making operation more convenient.

[0008] In one alternative implementation, the hot water interface of the hot water storage tank is equipped with a temperature detection structure.

[0009] The temperature detection structure ensures that the mixed water reaches the predetermined temperature, thus guaranteeing the normal operation of the hot water storage tank.

[0010] In one alternative embodiment, the system further includes a fifth pipeline connected in parallel with the third pipeline and a sixth pipeline connected in parallel with the first pipeline. The fifth pipeline is provided with at least one valve and a high-pressure pump, and the sixth pipeline is provided with a regulating valve. The system also includes a seventh pipeline connected in parallel with the fourth pipeline, and the seventh pipeline is provided with a filter and a low-pressure pump.

[0011] The high-temperature water stored in the upper part of the hot water storage tank is pressurized by a high-pressure pump and then transported to the outlet pipeline of the heating network circulation pump at the first heating station. The return water in the plant's heating network return water pipe is filtered and pressurized before entering the lower part of the hot water storage tank, ensuring the liquid level balance inside the hot water storage tank.

[0012] On the other hand, an adjustment method is also provided, including the following steps: During heat storage, the hot water from the outlet of the primary heating station's circulating pump mixes with the hot water from the plant's heating network supply pipe and is then transported to the hot water storage tank. The cold water from the cold water inlet of the hot water storage tank is then transported to the plant's heating network return pipe; or When the electric boiler provides direct heating, the hot water from the outlet of the heating network circulation pump at the primary heating station is heated by a heat exchanger and then delivered to the plant's heating network water supply pipe; or When an electric boiler is used for heating and heat storage, the cold water from the cold water inlet of the hot water storage tank is heated by a heat exchanger and then sent back to the hot water storage tank. When releasing heat, the hot water from the storage tank is transported to the outlet pipeline of the heating network circulation pump at the first heating station. It is then mixed with the return water from the heating network, reheated, and transported to the heating network supply pipeline in the plant area. The return water from the heating network in the plant area is then transported to the storage tank.

[0013] Beneficial effects: This invention achieves flexible switching between four operating modes—direct heating from the electric boiler, heating supply pipes from the plant area, return pipes from the plant area, and the electric boiler and hot water storage tank—by flexibly adjusting the connections between the heating network circulation pump at the primary heating station, the plant area heating network water supply pipes, the electric boiler heating water for hot water storage tanks, and the hot water storage tank releasing heat. This allows the plant area heating network water supply pipes to directly supply heat to the hot water storage tanks after mixing and cooling with the return water from the heating network circulation pump at the primary heating station when heat demand fluctuates significantly, maximizing energy utilization. The entire system has a simple structure and low cost.

[0014] In one optional implementation, during heat release, the hot water in the storage tank is pressurized and then transported to the outlet of the heating network circulation pump at the first heating station. It is mixed with the return water of the heating network, reheated, and then transported to the heating network supply pipe in the plant area. The return water of the heating network in the plant area is filtered, pressurized, and then transported to the storage tank.

[0015] By pressurizing, the water supply and return pipelines between the hot water storage tank and the plant's heating network supply and return pipelines are made more convenient to operate.

[0016] In one optional implementation, the hot water from the outlet of the heating network circulation pump at the primary heating station and the cold water from the cold water interface of the hot water storage tank are pressurized, heated by a heat exchanger, and then respectively delivered to the plant's heating network water supply pipe and the hot water interface of the hot water storage tank.

[0017] The above method ensures that the pressure of the water supplied to the heat exchanger of the electric boiler meets the requirements.

[0018] In one alternative implementation, the cold water flow rate at the cold water inlet of the hot water storage tank, the hot water flow rate at the outlet of the heating network circulation pump of the primary heating station, and the hot water flow rate at the outlet of the heating network supply pipe in the plant area are adjusted to regulate the heat storage speed and heat storage time.

[0019] The above adjustment methods are simple, reliable, and easy to operate.

[0020] In one alternative implementation, the temperature of the hot water mixed at the outlet of the heating network circulation pump at the primary heating station and the outlet of the heating network supply pipe in the plant area is detected until a predetermined temperature is reached before being transported to the hot water storage tank.

[0021] By adjusting the temperature of the mixed hot water from the outlet of the heating network circulation pump at the primary heating station and the hot water from the outlet of the plant's heating network supply pipe, the operating temperature of the hot water storage tank is met, thus extending the service life of the hot water storage tank.

[0022] In one alternative implementation, the pressure of the heating network water at the outlet of the heating network circulation pump at the primary heating station is greater than the pressure of the heating network water at the outlet of the heating network supply pipe in the plant area.

[0023] The above setup avoids the use of a booster pump, further reducing costs. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the heating network water operation regulation device of the combined hot water storage tank and electric boiler according to an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures: 1. Hot water storage tank; 101. Hot water receiving chamber; 102. Cold water receiving chamber; 103. Hot water interface; 104. Cold water interface; 105. Upper water distributor; 106. Lower water distributor; 107. Inclined temperature layer; 2. Electric boiler; 3. Heat exchanger; 4. High-pressure pump; 5. Filter; 6. Low-pressure pump. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The following is combined Figure 1 Embodiments of the present invention are described.

[0029] According to an embodiment of the present invention, in one aspect, a heating network water operation regulation device combining a hot water storage tank and an electric boiler is provided, comprising: Hot water storage tank 1 has a hot water receiving chamber 101, a cold water receiving chamber 102, a hot water interface 103 and a cold water interface 104, the hot water interface being connected to the hot water receiving chamber and the cold water interface being connected to the cold water receiving chamber. The electric boiler 2 has its inlet connected to the hot-side outlet of the heat exchanger 3, and its outlet connected to the hot-side inlet of the heat exchanger. Heat exchanger 3 has its cold side outlet connected to the plant's heating network water supply pipe or the hot water interface of the hot water storage tank, and its cold side inlet connected to the outlet of the heating network circulation pump at the first heating station or the cold water interface of the hot water storage tank. When the electric boiler 2 provides direct heating, the electric boiler 2 is connected to the outlet of the heating network circulation pump of the first heating station through the cold side inlet of the heat exchanger 3, and is connected to the water supply pipe of the heating network in the plant area through the cold side outlet of the heat exchanger 3. When the electric boiler 2 is used for heat storage, the cold water interface of the hot water storage tank is connected to the electric boiler through the cold side inlet of the heat exchanger, and the hot water interface of the hot water storage tank is connected to the electric boiler through the cold side outlet of the heat exchanger. Alternatively, during heat storage, after the outlet of the heating network circulation pump of the first heating station and the outlet of the heating network water supply pipe in the plant area are connected, they are connected to the hot water interface of the hot water storage tank, and the cold water interface of the hot water storage tank is connected to the return water pipe of the heating network in the plant area. When releasing heat, the hot water interface of the hot water storage tank is connected to the outlet of the heating network circulation pump of the first heating station. After mixing with the return water of the heating network and reheating, it is delivered to the heating network water supply pipe in the plant area. The cold water interface of the hot water storage tank is connected to the return water pipeline of the heating network in the plant area.

[0030] The hot water storage tank has an upper water distributor 105 at the top, a lower water distributor 106 at the bottom, and a temperature-controlled layer 107 in the middle. The hot water receiving chamber is located between the upper water distributor and the temperature-controlled layer, and the cold water receiving chamber is located between the lower water distributor and the temperature-controlled layer. The hot water inlet is located at the top, and the cold water inlet is located at the bottom. The hot water storage tank is an atmospheric pressure tank, storing both hot and cold water in one tank, eliminating the need for separate hot and cold water tanks, reducing investment and operating costs, and lowering the requirements for operation and maintenance. The hot water storage tank is directly connected to the plant's heating network water supply pipe, maintaining the pressure in the network and acting as an expansion tank. This is especially beneficial for users in high-altitude areas where altitude differences are significant. The hot water storage tank can easily determine the stable pressure value of the network system and replenish water to the network in a timely manner during heating network failures, stabilizing network pressure and reducing losses. The electric boiler is a high-pressure electrode boiler, connected to heat exchanger 3. The heat exchanger is installed between the electric boiler and the heating network circulation pump of the first heating station and the water supply pipe of the plant heating network to exchange heat for hot or cold water.

[0031] Beneficial effects: This invention achieves flexible adjustment of four operating conditions through a set of heating network pipeline systems: direct heating by electric boilers, heating by electric boilers for hot water storage tanks, heating by the plant's heating network for hot water storage tanks, and heat release from the hot water storage tanks. This satisfies the need for the plant's heating network water supply pipes to directly supply hot water storage tanks after mixing and cooling the return water from the outlet of the heating network circulation pump at the first heating station when the heat demand fluctuates greatly, thus maximizing energy utilization. The entire system has a simple structure and low cost.

[0032] In one embodiment, the outlet of the heating network circulation pump at the primary heating station is provided with a first pipeline, and the outlet of the plant area heating network water supply pipe is provided with a second pipeline. The first and second pipelines are connected in parallel and then connected in series with a third pipeline. The other end of the third pipeline is connected to the hot water interface of the hot water storage tank. A fourth pipeline is provided between the cold water interface of the hot water storage tank and the return water pipe of the plant area heating network. Both the second and fourth pipelines are equipped with regulating valves.

[0033] The first pipeline is equipped with valves K02 and K12; the second pipeline is equipped with valves K03 and K16 and regulating valve T3; the third pipeline is equipped with valve K11; and the fourth pipeline is equipped with valves K1, K2, K3, K4, regulating valve T1, and valve K01 in sequence. When the plant's heating network supplies water to the hot water storage tank, the electric boiler and corresponding water pumps are shut down. Electric valves K03, K16, K02, K14, K15 and regulating valves T2 and T3 are opened. High-temperature water at 110°C from the plant's heating network supply pipe mixes with 50°C temperature-adjusting water from the heating network circulation pump at the primary heating station. After reaching 95°C, the mixture is depressurized and enters the upper part of the hot water storage tank, where it is maintained at 95°C. The 50°C temperature-adjusting water flow is regulated by adjusting the opening of regulating valve T3. Open the electric valves K1, K2, K3, K4, K01 and the second regulating valve T1, and the 50°C hot water from the bottom of the hot water storage tank returns to the plant's hot water return pipe through the low-temperature water pipeline.

[0034] The heating network circulation pump at the primary heating station, the water supply pipe of the heating network in the plant area, the return water pipe of the heating network in the plant area, and the hot water storage tank are connected by multiple pipelines. Different pipeline connections can be achieved by adjusting the regulating valve, which saves the number of pipelines and further reduces costs. Moreover, the heat storage speed and heat storage time can be adjusted by adjusting the opening of the regulating valve, making operation more convenient.

[0035] In one embodiment, the hot water interface of the hot water storage tank is equipped with a temperature detection structure.

[0036] The temperature detection structure is a thermometer or temperature sensor. The temperature detection structure ensures that the mixed water temperature reaches the predetermined temperature, thus ensuring the normal operation of the hot water storage tank.

[0037] In one embodiment, the system further includes a fifth pipeline connected in parallel with the third pipeline and a sixth pipeline connected in parallel with the first pipeline. The fifth pipeline is provided with at least one valve and a high-pressure pump 4, and the sixth pipeline is provided with a regulating valve. The system also includes a seventh pipeline connected in parallel with the fourth pipeline, and the seventh pipeline is provided with a filter 5 and a low-pressure pump 6.

[0038] The fifth pipeline is equipped with valves K9 and K10, and two high-pressure pumps are connected in parallel. The sixth pipeline is equipped with valves K14, K15 and a regulating valve T2. The seventh pipeline is equipped with a valve K6, and two low-pressure pumps are connected in parallel. The outlets of the two low-pressure pumps are arranged between the electric valves K2 and K3. An eighth pipeline is provided between the inlets of the two low-pressure pumps and the electric valve K1, and a valve K5 is provided on the eighth pipeline. When the heat storage water tank releases heat, the electric boiler and the corresponding water pumps are shut down, and the electric valves K9, K10, K12 and K02 are opened. The 95°C high-temperature water stored in the upper part of the heat storage tank is pressurized by the high-pressure pump and then transported to the outlet header pipe of the heat network circulation pump at the heat supply main station. After being mixed with the heat network return water, it enters the heat network heater for secondary heating to the required temperature and then is transported to the factory area heat network supply pipe. The electric valves K01, K4, K6, K2, K1 and the regulating valve T1 are opened. The 50°C heat network return water is led out from the factory area heat network return pipe, filtered by the automatic filter, and then boosted by the low-pressure pump and enters the lower part of the heat storage water tank.

[0039] The high-temperature water stored in the upper part of the heat storage water tank is pressurized by the high-pressure pump and then transported to the outlet pipeline of the heat network circulation pump at the heat supply main station. The return water in the factory area heat network return pipe is filtered and boosted and then enters the lower part of the heat storage water tank, ensuring the liquid level balance inside the heat storage water tank.

[0040] On the other hand, a regulation method is also provided, including the following steps: During heat storage, the heat network water at the outlet of the heat network circulation pump at the heat supply main station is mixed with the hot water at the outlet of the factory area heat network supply pipe and then transported to the heat storage water tank. The cold water at the cold water interface of the heat storage water tank is transported to the factory area heat network return pipe; or When the electric boiler directly supplies heat, the heat network water at the outlet of the heat network circulation pump at the heat supply main station is heated by the heat exchanger and then transported to the factory area heat network supply pipe; or When the electric boiler generates heat for heat storage, the cold water at the cold water interface of the heat storage water tank is heated by the heat exchanger and then transported back to the heat storage water tank; During heat release, the hot water in the heat storage water tank is transported to the outlet pipeline of the heat network circulation pump at the heat supply main station, mixed with the heat network return water and reheated and then transported to the factory area heat network supply pipe. The heat network return water in the factory area heat network return pipeline is transported to the heat storage water tank.

[0041] When the electric boiler directly supplies heat, the electric valves K02, K12, K8, K6, K2 and K7 are opened. The 50°C heat network water from the outlet header pipe of the heat network circulation pump at the heat supply main station is boosted by the low-pressure pump and then pumped into the heat exchanger supporting the electric boiler system for heating. The electric valves K13, K14 and K03 are opened. The 110°C heat network water heated by the heat exchanger supporting the electric boiler system returns to the factory area heat network supply pipe, and the factory area heat network supply pipe is connected to the urban heat network supply pipe for direct heating.

[0042] When the electric boiler is used for heating and storing heat in the heat storage water tank, open the electric valves K5, K2, and K7. The 50°C heat network water from the lower interface of the heat storage water tank is boosted by a low-pressure pump and then sent into the heat exchanger supporting the electric boiler system for heating. Open the electric valves K13, K15, K11, and the third regulating valve T2. The 95°C heat network water heated by the heat exchanger supporting the electric boiler system enters the upper interface of the heat storage water tank for heat storage.

[0043] Beneficial effects: By flexibly adjusting the connections among the heat network circulation pump at the heat supply first station, the heat network supply pipe in the plant area, the heat network return pipe in the plant area, the electric boiler, and the heat storage water tank, the present invention realizes the seamless switching among four operating conditions, namely direct heating by the electric boiler, heating by the electric boiler for heat storage in the heat storage water tank, heat storage in the heat storage water tank by the heat network water supply in the plant area, and heat release from the heat storage water tank. Thus, when the heat demand fluctuates greatly, the heat network supply pipe in the plant area can directly store heat in the heat storage water tank after the return water is mixed with the water from the outlet of the heat network circulation pump at the heat supply first station and cooled by mixing, achieving the maximization of energy utilization. The whole system has a simple structure and low cost.

[0044] In one embodiment, during heat release, the hot water in the heat storage water tank is pressurized and then transported to the outlet of the heat network circulation pump at the heat supply first station, mixed with the heat network return water and reheated, and then transported to the heat network supply pipe in the plant area. The heat network return water in the heat network return pipe of the plant area is filtered, boosted in pressure, and then transported to the heat storage water tank.

[0045] When the heat storage water tank releases heat, the electric boiler and the corresponding water pumps are shut down. Open the electric valves K9, K10, K12, and K02. The 95°C high-temperature water stored in the upper part of the heat storage tank is pressurized by a high-pressure pump and then transported to the header pipe at the outlet of the heat network circulation pump at the heat supply first station, mixed with the heat network return water, and then enters the heat network heater for secondary heating to the required temperature and then transported to the heat network supply pipe in the plant area. Open the electric valves K01, K4, K6, K2, K1, and the regulating valve T1. The 50°C heat network return water is led out from the heat network return pipe in the plant area, filtered by an automatic filter, and then boosted in pressure by a low-pressure pump and enters the lower part of the heat storage water tank.

[0046] The water supply and return water transportation between the heat storage water tank and the heat network supply pipe and the heat network return pipe in the plant area are realized through pressurization, making the operation more convenient.

[0047] In one embodiment, the heat network water at the outlet of the heat network circulation pump at the heat supply first station and the cold water at the cold water interface of the heat storage water tank are boosted in pressure, heated by a heat exchanger, and then transported to the heat network supply pipe in the plant area and the hot water interface of the heat storage water tank respectively.

[0048] The above method ensures that the pressure of the water transported to the heat exchanger supporting the electric boiler can meet the requirements.

[0049] In one embodiment, the cold water flow rate at the cold water inlet of the hot water storage tank, the hot water flow rate at the outlet of the heating network circulation pump at the first heating station, and the hot water flow rate at the outlet of the heating network supply pipe in the plant area are adjusted to regulate the heat storage speed and heat storage time.

[0050] The heat storage rate and time can be adjusted by regulating the opening of regulating valves T1, T2, and T3; the heat release rate and time can be adjusted by regulating the flow rates of the low-pressure pump and the high-pressure pump; and the additional heat, heat storage rate, and heat storage time of the heating network water supply can be adjusted by adjusting the power of the electric boiler and the flow rate of the low-pressure pump. The above adjustment methods are simple, reliable, and easy to operate.

[0051] In one embodiment, the temperature of the hot water mixed at the outlet of the heating network circulation pump of the primary heating station and the outlet of the heating network supply pipe in the plant area is detected until a predetermined temperature is reached before being transported to the hot water storage tank.

[0052] By adjusting the temperature of the mixed hot water from the outlet of the heating network circulation pump at the primary heating station and the hot water from the outlet of the plant's heating network supply pipe, the operating temperature of the hot water storage tank is met, thus extending the service life of the hot water storage tank.

[0053] In one embodiment, the pressure of the heating network water at the outlet of the heating network circulation pump of the primary heating station is greater than the pressure of the heating network water at the outlet of the heating network supply pipe in the plant area.

[0054] The above setup avoids the use of a booster pump, further reducing costs.

[0055] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A heating network water operation regulation device for a combined hot water storage tank and electric boiler, characterized in that, include: A hot water storage tank (1) has a hot water receiving chamber (101), a cold water receiving chamber (102), a hot water interface (103), and a cold water interface (104). The hot water interface (103) is connected to the hot water receiving chamber (101), and the cold water interface (104) is connected to the cold water receiving chamber (102). The electric boiler (2) has its inlet connected to the hot side outlet of the heat exchanger (3), and its outlet connected to the hot side inlet of the heat exchanger (3). The heat exchanger (3) has its cold side outlet connected to the hot water interface (103) of the plant area heating network water supply pipe or the hot water storage tank (1), and its cold side inlet connected to the outlet of the heating network circulation pump of the first heating station or the cold water interface (104) of the hot water storage tank (1). When the electric boiler (2) provides direct heating, the electric boiler (2) is connected to the outlet of the heating network circulation pump of the first heating station through the cold side inlet of the heat exchanger (3), and connected to the water supply pipe of the heating network in the plant area through the cold side outlet of the heat exchanger (3). When the electric boiler (2) is used for heat storage, the cold water interface (104) of the hot water storage tank (1) is connected to the electric boiler (2) through the cold side inlet of the heat exchanger (3), and the hot water interface (103) of the hot water storage tank (1) is connected to the electric boiler (2) through the cold side outlet of the heat exchanger (3). Alternatively, during heat storage, after the outlet of the heating network circulation pump of the first heating station and the outlet of the heating network water supply pipe of the plant area are connected, they are connected to the hot water interface (103) of the hot water storage tank (1), and the cold water interface (104) of the hot water storage tank (1) is connected to the return water pipe of the heating network of the plant area. When releasing heat, the hot water interface (103) of the hot water storage tank (1) is connected to the outlet of the heating network circulation pump of the first heating station, and after mixing with the return water of the heating network and reheating, it is transported to the heating network water supply pipe of the plant area. The cold water interface (104) of the hot water storage tank (1) is connected to the return water pipeline of the heating network of the plant area.

2. The heating network water operation regulation device for a combined hot water storage tank and electric boiler according to claim 1, characterized in that, The outlet of the heating network circulation pump of the first heating station is provided with a first pipeline, and the outlet of the water supply pipe of the plant area heating network is provided with a second pipeline. The first pipeline and the second pipeline are connected in parallel and then connected in series with a third pipeline. The other end of the third pipeline is connected to the hot water interface (103) of the hot water storage tank (1). A fourth pipeline is provided between the cold water interface (104) of the hot water storage tank (1) and the return water pipe of the plant area heating network. Both the second pipeline and the fourth pipeline are provided with regulating valves.

3. The heating network water operation regulation device for a combined hot water storage tank and electric boiler according to claim 2, characterized in that, The hot water interface (103) of the hot water storage tank (1) is equipped with a temperature detection structure.

4. The heating network water operation regulation device for a combined hot water storage tank and electric boiler according to claim 2, characterized in that, It also includes a fifth pipeline connected in parallel with the third pipeline and a sixth pipeline connected in parallel with the first pipeline. The fifth pipeline is provided with at least one valve and a high-pressure pump (4), and the sixth pipeline is provided with a regulating valve. It also includes a seventh pipeline connected in parallel with the fourth pipeline. The seventh pipeline is provided with a filter (5) and a low-pressure pump (6).

5. A method for regulating the operation of a combined hot water storage tank and electric boiler using the heat network water operation regulating device according to any one of claims 1 to 4, characterized in that, Includes the following steps: During heat storage, the hot water from the outlet of the heating network circulation pump at the first heating station mixes with the hot water from the outlet of the plant's heating network supply pipe and is then transported to the hot water storage tank (1). The cold water from the cold water inlet (104) of the hot water storage tank (1) is then transported to the plant's heating network return pipe; or When the electric boiler (2) provides direct heating, the heating network water at the outlet of the heating network circulation pump of the first heating station is heated by the heat exchanger (3) and then transported to the heating network water supply pipe in the plant area; or When the electric boiler (2) is used for heat storage, the cold water from the cold water inlet (104) of the hot water storage tank (1) is heated by the heat exchanger (3) and then sent back to the hot water storage tank (1); When releasing heat, the hot water from the storage tank (1) is transported to the outlet pipeline of the heating network circulation pump at the first heating station. It is mixed with the return water of the heating network and reheated before being transported to the heating network supply pipe in the plant area. The return water of the heating network in the plant area is transported to the storage tank (1).

6. The adjustment method according to claim 5, characterized in that, When releasing heat, the hot water in the storage tank (1) is pressurized and then transported to the outlet of the heating network circulation pump of the first heating station. It is mixed with the return water of the heating network and reheated before being transported to the heating network supply pipe in the plant area. The return water of the heating network in the plant area is filtered, pressurized, and then transported to the storage tank (1).

7. The adjustment method according to claim 5, characterized in that, The cold water from the outlet of the heating network circulation pump at the first heating station and the cold water from the cold water interface (104) of the hot water storage tank (1) are pressurized and heated by a heat exchanger before being delivered to the heating network water supply pipe and the hot water interface (103) of the hot water storage tank (1) in the plant area.

8. The adjustment method according to claim 5, characterized in that, Adjust the cold water flow rate of the cold water interface (104) of the hot water storage tank (1), the hot water flow rate of the hot network circulation pump outlet of the heating station, and the hot water flow rate of the hot network water supply pipe outlet of the plant area to regulate the heat storage speed and heat storage time.

9. The method of adjustment according to any one of claims 5 to 8, characterized in that, The temperature of the hot water at the outlet of the heating network circulation pump of the first heating station is detected after mixing with the hot water at the outlet of the heating network supply pipe in the plant area until the predetermined temperature is reached before being transported to the hot water storage tank (1).

10. The adjustment method according to claim 9, characterized in that, The pressure of the heating network water at the outlet of the heating network circulation pump at the first heating station is greater than the pressure of the heating network water at the outlet of the heating network supply pipe in the plant area.

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