A variable volume rapid steam generation electric energy storage device

Abstract

The present invention relates to a variable volume rapid steam production electric energy storage device. The purpose is to provide a variable volume rapid steam production electric energy storage device, which, in addition to satisfying the requirement of large energy storage under a conventional voltage of 380V power supply, can have the function of rapid steam production under the same power consumption, and has the characteristics of high power utilization efficiency, low investment cost, and low operating cost. The technical solution is a variable volume rapid steam production electric energy storage device, comprising an electric energy storage container in a closed state, a heating component arranged in the electric energy storage container, and a water inlet pipe and a steam output pipe respectively connected to the electric energy storage container; the characteristic is that: the inner cavity of the electric energy storage container is divided into three independent water storage spaces with interconnected top ends, each space is equipped with the heating component, and the number of heating components arranged in one space is matched according to the maximum heating power of the electric energy storage device, and the maximum heating power is the rated power of the electric energy storage device.

Description

Technical Field

[0001] The invention relates to a variable volume rapid steam generation electric energy storage device, in particular to an electric steam energy storage device suitable for rapid steam generation and energy saving at conventional voltage. Background Art

[0002] In the context of my country's carbon peak and carbon neutrality, strengthening the electrification of terminal energy consumption is an inevitable trend. In order to achieve the consumption of green new energy such as wind power or to achieve peak load shifting and valley load shifting in electricity consumption, electric steam energy storage devices will be rapidly applied.

[0003] At present, most electric steam energy storage devices on the market use large-volume high-temperature hot water for energy storage by electric heating. When steam is needed, the high-temperature and high-pressure hot water is flashed to output steam. However, this device has the following disadvantages: First, in order to meet the larger energy storage requirements, the accumulator needs to store hot water in a larger volume, and it takes a long time to electrically heat the hot water to hot water with high temperature and high pressure with flash evaporation capability; second, because resistance heating is generally used, although the thermal efficiency is high, the replenishment water after steam output is still room temperature water, and there is still a large space for energy saving that has not been explored; third, conventionally speeding up the steam production speed requires increasing the heating power, which requires the transformer to be modified to increase the capacity to increase the heating resistance power or to become an electrode boiler. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and to provide a variable volume rapid steam production electric energy storage device, which, in addition to meeting the requirement of large energy storage under a conventional voltage of 380V power supply, can have the function of rapid steam production under the same power consumption, and has the characteristics of high energy utilization efficiency, low investment cost and low operating cost.

[0005] The technical solution provided by the present invention is:

[0006] A variable volume rapid steam generation electric energy storage device comprises an electric energy storage container in a closed state, a heating component arranged in the electric energy storage container, and a water inlet pipe and a steam output pipe respectively connected to the electric energy storage container; characterized in that: the inner cavity of the electric energy storage container is divided into three independent water storage spaces which are interconnected at the top, each space is equipped with the heating component, and the number of heating components arranged in one space is matched according to the maximum heating power of the electric energy storage device, and the maximum heating power is the rated power of the electric energy storage device.

[0007] The water inlet pipes of the three water storage spaces are all equipped with valves, and these water inlet pipes are connected in parallel and then connected to the hot water tank and the air energy heat pump in turn.

[0008] The three water storage spaces are separated by partitions; and the partitions are all equipped with support rods to increase the rigidity of the container.

[0009] The heating components shown are divided into several rows and installed in rows from the bottom to the top; in the water storage space matched with the maximum heating power, the height of the heating components in the top row is lower than the top of the partition; the height of the heating components in the top row in the other two water storage spaces is one quarter to one half of the height of the heating components in the top row in the water storage space matched with the maximum heating power.

[0010] The arrangement method of the heating components is as follows: the heating components in the water storage space matched with the maximum heating power are divided into two upper and lower areas, wherein the number of heating components in the upper area is two-thirds of the total number of heating components in the water storage space, and the number of heating components in the lower area is one-third of the total number of heating components in the water storage space; the heating components in the water storage spaces in the other two areas are respectively one-third of the total number of heating components at the maximum heating power.

[0011] The three water storage spaces are also equipped with power switches respectively; the upper and lower areas in the water storage space that matches the maximum heating power are respectively provided with power switches, so that each area can operate independently.

[0012] The electric energy storage container is also provided with a plurality of liquid level sensors, which cooperate with corresponding valves to form a water level control device for each water storage space, and are used to control the water inlet and the liquid level of each area, so as to achieve the purpose of protecting the safe operation of the heating component.

[0013] The liquid level sensor controls the liquid level of each water storage space in the following manner: in the rapid steam production operation mode, the minimum liquid level of the middle water storage space is required to be 100 mm higher than the top row of heating components in the area and lower than the top of the partition; in the conventional energy storage operation mode, each water storage space is required to be 100 mm higher than the operating heating components; during the entire energy storage period, the liquid level must be 100 mm lower than the top of the inner wall of the electric energy storage container.

[0014] The heating component is an electric heating tube.

[0015] The beneficial effects of the present invention are as follows: the present invention can store energy under a conventional voltage of 380V power supply, so as to achieve the purpose of rapid steam production through a variable volume operation mode at a relatively low investment cost, and is suitable for places with high steam response requirements; at the same time, the energy efficiency of the accumulator can be improved through a heat pump and related control methods, so as to achieve a relatively low operating cost; the present invention has a larger application space under valley power operation conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of an embodiment of the present invention (top view).

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the electric energy storage container in an embodiment of the present invention (front view).

[0018] Numbers in the figure: 1. heat pump; 2. hot water tank; 3. first valve; 4. second valve; 5. water supply pump; 6. third valve; 7. fourth valve; 8. fifth valve; 9. water outlet pipe; 10. electric energy storage container; 11. partition; 12. steam valve; 13. support rod; water inlet pipe 14. DETAILED DESCRIPTION

[0019] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0020] The variable volume rapid steam generation electric energy storage device shown in the attached drawings comprises a closed electric energy storage container 10, in which a heating component is provided, and a water inlet pipe connected to the electric energy storage container and a steam output pipe installed at the top of the electric energy storage container and equipped with a steam valve 12; the above structures are similar to those of existing electric steam energy storage devices.

[0021] The improvement of the present invention is that: the electric energy storage container is divided into three independent water storage spaces (indicated by area A, area B, and area C in the figure) that are interconnected at the top, forming three independent heating spaces; each space is equipped with the heating components and the number of heating components configured is different, and the number of heating components configured in one of the water storage spaces (area B shown in the figure) is matched according to the maximum heating power. The maximum heating power refers to the rated heating power of the entire electric energy storage device; for example, for a 1.8MW electric energy storage device, the power of a single heating component is 30kW, and the water storage space in area B needs to be equipped with 60 heating components.

[0022] Furthermore, the arrangement method of the heating components is as follows: the heating components in the water storage space (area B) matched with the maximum heating power need to be divided into two upper and lower areas, wherein the number of heating components in the upper area is two-thirds of the total number of heating components at the rated heating power (i.e. 40), and the number of heating components in the lower area is one-third of the total number of heating components at the rated heating power (i.e. 20). The heating components in the water storage spaces of areas A and B are respectively one-third of the total number of heating components at the rated heating power (i.e. 20). The heating components are divided into several rows and installed in rows from the bottom to the top (the installation structure of the heating components is the same as that of the existing electric steam energy storage device); in the water storage space (area B) matched with the maximum heating power, the height of the top row of heating components is lower than the top of the partition to ensure that the heating components are submerged in the water; the height of the top row of heating components in the other two water storage spaces is one-quarter to one-half (preferably one-third) of the height of the top row of heating components in area B.

[0023] The water inlet pipes of the three water storage spaces are all equipped with valves (shown in the figure: the water inlet pipe of the water storage space in area A is equipped with a third valve 6, the water inlet pipe of the water storage space in area B is equipped with a fourth valve 7, and the water inlet pipe of the water storage space in area C is equipped with a fifth valve 8), and these water inlet pipes are connected in parallel and then connected to the hot water tank 2 and the air energy heat pump 1 in sequence. The air energy heat pump can heat the room temperature water to a higher hot water and store it in the hot water tank, and the hot water tank is then input into the electric energy storage container through the water inlet pipe; it can effectively improve the energy utilization efficiency.

[0024] The three water storage spaces are separated by partitions 11 (preferably steel plates), and support rods 13 are provided to support the partitions to increase the rigidity of the container.

[0025] The three water storage spaces are also equipped with power switches respectively; the upper and lower areas of zone B are respectively equipped with power switches; so that the heating components in each area can operate independently.

[0026] In addition, the present invention also sets a number of liquid level sensors on the inner walls of each water storage space of the electric energy storage container. These liquid level sensors cooperate with corresponding valves to form a water level control device (when the water level is lower than the heating component, the water level control device disconnects the power supply) to control the water inlet and the liquid level of each area, so as to achieve the purpose of protecting the safe operation of the heating components in the three areas.

[0027] The water level control device controls the liquid level of each water storage space in the following manner: in the rapid steam production operation mode, the minimum liquid level in zone B is required to be 100mm higher than the top row of heating components in the zone and lower than the top of the partition; in the conventional energy storage operation mode, each water storage space is required to be 100mm higher than the operating heating components. During the entire operation of the energy storage period, the liquid level must be 100mm lower than the top of the inner wall of the electric energy storage container.

[0028] The heating component is preferably an electric heating tube.

[0029] The working principle of the present invention is (see Figure 2 ): At the beginning of an energy storage heating cycle, when the liquid level in zone B is lower than the top electric heating pipe, the hot water at the bottom of zones A and C of the electric energy storage container is sent to zone B through the water supply pump to immerse the top row of electric heating pipes in zone B, and the electric heating pipes in zone B are fully opened in the relatively small water storage space in zone B to obtain the maximum heating power and achieve the purpose of rapid steam production. The heat pump operates during the entire energy storage heating cycle, inputting hot water into the electric steam energy storage container; when the steam demand is met, and the water levels in zones A and C are higher than the top row of electric heating pipes in this area, the electric heating pipes at the bottom of zones A, C and B can be started to switch to the energy storage-based mode. Due to the use of air energy heat pumps, the energy efficiency is higher than that of normal temperature water directly entering the electric steam energy storage container for heating, which can achieve energy-saving effects.

Claims

1. A variable volume rapid steam generation electric energy storage device, comprising a closed electric energy storage container (10), a heating component arranged in the electric energy storage container, and a water inlet pipe (14) and a steam output pipe (12) respectively connected to the electric energy storage container; Features: The inner cavity of the electric energy storage container is divided into three independent water storage spaces that are interconnected at the top, each space is equipped with the heating component, and the number of heating components configured in one space is matched according to the maximum heating power of the electric energy storage device; The water inlet pipes of the three water storage spaces are all equipped with valves, and these water inlet pipes are connected in parallel and then connected to the hot water tank (2) and the air energy heat pump (1) in sequence; The heating components are divided into several rows and are installed in rows from the bottom to the top; in the water storage space with the maximum heating power, the height of the heating components in the top row is lower than the top of the partition; the height of the heating components in the top row in the other two water storage spaces is one quarter to one half of the height of the heating components in the top row in the water storage space with the maximum heating power; The arrangement method of the heating components is as follows: the heating components in the water storage space matched with the maximum heating power are divided into two upper and lower areas, wherein the number of heating components in the upper area is two-thirds of the total number of heating components in the water storage space, and the number of heating components in the lower area is one-third of the total number of heating components in the water storage space; the heating components in the water storage spaces of the other two areas are respectively one-third of the total number of heating components at the maximum heating power; The working mode of the electric energy storage device is: At the beginning of an energy storage heating cycle, when the liquid level in zone B is lower than the top electric heating pipe, the hot water at the bottom of zones A and C of the electric energy storage container is sent to zone B through the water supply pump to immerse the top row of electric heating pipes in zone B, and the electric heating pipes in zone B are fully opened in the relatively small water storage space in zone B for operation; the heat pump operates during the entire energy storage heating cycle to input hot water into the electric steam energy storage container; when the steam demand is met, and the water levels in zones A and C are higher than the top row of electric heating pipes in the area, the electric heating pipes at the bottom of zones A, C and B can be started and switched to the energy storage-based mode; The area B is the water storage space matched with the maximum heating power; the areas A and C are the water storage spaces of the other two areas.

2. The variable volume rapid steam generation electric energy storage device according to claim 1, Features: The three water storage spaces are separated by partitions (11); and the partitions are each provided with a support rod (13) to increase the rigidity of the container.

3. The variable volume rapid steam generation electric energy storage device according to claim 2, Features: The three water storage spaces are also equipped with power switches respectively; the upper and lower areas in the water storage space that matches the maximum heating power are respectively provided with power switches; so that each area can operate independently.

4. The variable volume rapid steam generation electric energy storage device according to claim 3, Features: The electric energy storage container is also provided with a plurality of liquid level sensors, which cooperate with corresponding valves to form a water level control device for controlling the water inlet and the liquid level of each area, so as to achieve the purpose of protecting the safe operation of the heating component.

5. The variable volume rapid steam generation electric energy storage device according to claim 4, Features: The water level control device controls the liquid level of each water storage space in the following manner: in the rapid steam production operation mode, the maximum heating power is required to match the minimum liquid level of the water storage space to be 10 cm higher than the top row of heating components in the area and lower than the top of the partition; in the conventional energy storage operation mode, each water storage space is required to be 10 cm higher than the operating heating components; during the entire energy storage period, the liquid level must be 10 cm lower than the top of the inner wall of the electric energy storage container.

6. The variable volume rapid steam generation electric energy storage device according to claim 5, Features: The electric energy storage container also calibrates the initial liquid level of the energy storage cycle and the final liquid level of the energy storage cycle; the initial liquid level of the energy storage cycle is 10 cm below the top of the partition; the final liquid level of the energy storage cycle is 10 cm below the top of the inner wall of the electric energy storage container.

7. The variable volume rapid steam generation electric energy storage device according to claim 6, Features: The heating component is an electric heating tube.

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