Heat and energy storage system

Abstract

The utility model relates to the technical field of heat storage, in particular to a heat and energy storage system. The system comprises a solid heat accumulator, a high-pressure control cabinet, a steam generator, a heat exchange fan and a steam-water separator, the high-pressure control cabinet distributes power to generate heat for the solid heat accumulator, the solid heat accumulator generates and stores heat, high-temperature hot air of the solid heat accumulator is blown into the steam generator through the heat exchange fan, and the steam-water separator is connected with the steam generator. Water in the heat exchange pipe is heated to medium temperature in the low-temperature heat exchange area in the steam generator and then is heated by the high-temperature evaporation area to form a steam-water mixed state, the steam-water mixed state is divided into saturated steam and liquid water by the steam-water separator, the saturated steam is used for being conveyed to a heat user, and the liquid water flows back to the heating pipe to be reused. The system can generate and store heat at a low electricity consumption ebb, the waste heat of the high-temperature evaporation area is fully utilized to form a low-temperature heat exchange area to heat low-temperature water, the heat consumption efficiency is high, and peak load shifting of electricity consumption can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat storage, specifically refers to a heat storage and energy storage system. BACKGROUND

[0002] In the field of industrial heat supply, traditional coal-fired boilers are gradually replaced by gas boilers and electric boilers, gas boilers use non-renewable natural gas as fuel, which cannot meet the national energy-saving and carbon-reducing policy, a large amount of emissions will take away part of the heat, and the heat cannot be directly stored, the overall operation efficiency is low, resulting in high cost; the industrial heat peak is often the power peak, and the conventional electric boiler has limited heat storage capacity, so it is necessary to produce heat at the power peak to meet the industrial heat demand, which is high in cost. SUMMARY

[0003] The main purpose of the utility model is to solve the problem of high heat production cost, and provide a heat storage and energy storage system.

[0004] The technical scheme adopted by the utility model is: a heat storage and energy storage system; the system comprises,

[0005] The solid heat storage body comprises a heat preservation cover, a heat storage solid body arranged in the heat preservation cover, and an electric heating wire in thermal conduction with the heat storage solid body;

[0006] The high-voltage control cabinet is used for configuring a high-voltage electric connection electric heating wire;

[0007] The steam generator comprises an air inlet and an air return forming a circulating air path in communication with the heat preservation cover, a high-temperature evaporation zone and a low-temperature heat exchange zone arranged in sequence on the circulating air path, and a heat exchange pipe passing through the low-temperature heat exchange zone and the high-temperature evaporation zone in sequence, for heating water flowing through the low-temperature heat exchange zone to form a steam-water mixed state flowing out through the high-temperature evaporation zone;

[0008] The steam-water separator is connected by pipeline with the steam generator, and is used for separating the steam-water mixed state into saturated steam delivered to the heat user and liquid water returned to the steam generator;

[0009] The heat exchange fan is arranged on the circulating air path, and is used for driving the high-temperature hot gas in the heat preservation cover to enter the steam generator.

[0010] Further, the heat exchange pipe is provided with an oxygen removal pump located between the low-temperature heat exchange zone and the high-temperature evaporation zone.

[0011] Further, the heat exchange pipe is provided with a second water pump located between the low-temperature heat exchange zone and the high-temperature evaporation zone.

[0012] Further, it further comprises a water softening device connected with the heat exchange pipe, for softening and storing water source.

[0013] Further, the steam generator bottom is provided with a condensing pipe, the condensing pipe is communicated with the soft water device, and is used for conveying condensed water to the heat exchange pipe for heat exchange; the steam-water separator pipe is connected with the soft water device, and is used for conveying separated liquid water.

[0014] Further, the soft water device is provided with a first water pump between the soft water device and the heat exchange pipe, and the first water pump is used for pumping water to the heat exchange pipe.

[0015] Further, the soft water device comprises a water softener and a soft water tank communicated with the water softener, and the soft water tank is communicated with the first water pump.

[0016] Further, the steam cylinder is further provided with a steam-water separator, the steam-water separator is connected with the steam cylinder, and is used for regulating and controlling saturated steam to be conveyed to the plurality of heat users.

[0017] Further, the heat storage solid is provided with a heat transfer hole, and the electric heating wire is arranged in the heat transfer hole; and the heat storage solid comprises a magnesium brick material.

[0018] Further, the high-voltage control cabinet comprises a high-voltage switch cabinet and a PLC control cabinet, the high-voltage switch cabinet is connected with the solid heat storage body, and is used for power distribution of the solid heat storage body, and the PLC control cabinet is used for detecting and regulating and controlling the electric element of the solid heat storage body.

[0019] The beneficial effects of the utility model include: 1. through the high-voltage control cabinet, the electric heating wire can produce heat by high-voltage electricity in the electricity low valley, the heat storage solid stores heat, when using heat, the high-temperature hot gas in the heat preservation cover is driven by the heat exchange fan to enter the steam generator, the low-temperature water of the heat exchange pipe is heated to medium temperature through the low-temperature heat exchange area, and then is heated to form a steam-water mixture through the high-temperature evaporation area, flows into the steam-water separator, the separated saturated steam is used to be conveyed to the heat user, and the separated liquid water flows back to the steam generator to be recycled, the temperature of the high-temperature hot gas is reduced after being evaporated and exchanged in the high-temperature evaporation area, is used to heat the low-temperature water to medium temperature as secondary utilization of the low-temperature heat exchange area, and then flows into the heat preservation cover to be recycled, the utilization efficiency of heat energy is improved, the peak shaving of electricity can be realized, and the problem that the existing electric heating furnace needs to produce heat in the electricity peak to meet the industrial heat demand, resulting in high cost can be solved;

[0020] 2. through the deaerating pump, oxygen in the water after heat exchange in the low-temperature heat exchange area can be removed, the quality of the feed water is guaranteed, the equipment and the pipeline are prevented from being corroded, and the service life is prolonged; the deaerating pump is arranged downstream of the low-temperature heat exchange area, heat of the low-temperature heat exchange area is utilized after deaeration, and the heat energy utilization is improved;

[0021] 3. through the second water pump, the warm water of the low-temperature heat exchange area can be provided to enter the high-temperature evaporation area, and the water circulation of heat exchange is guaranteed;

[0022] 4. through the soft water device, the mineral content in the municipal water supply can be reduced, soft water storage is formed, the equipment and the pipeline are prevented from being corroded, and the service life is prolonged.

[0023] 5. The steam generator collects water from the condenser and then flows it to the water softener. The liquid water separated by the steam-water separator also flows to the water softener and can be centrally fed into the heat exchange tubes for recycling, making full use of the heat in the condensate and the separated liquid water.

[0024] 6. The first water pump can pump the soft water stored in the soft water device into the heat exchange tube, avoiding insufficient water power and reducing the water circulation efficiency of this system.

[0025] 7. The water softening device of this utility model has a simple structure. It filters and softens municipal water sources to form soft water, which is stored in a soft water tank. The soft water tank can also store condensate and separated liquid water, making it convenient to use.

[0026] 8. The steam distribution cylinder can supply heat to multiple heat users and regulate the heat consumption of each heat user;

[0027] 9. The heat storage solid is equipped with heating wires through heat transfer holes, which has high heat transfer efficiency and enables the rapid storage of heat on the heat storage solid.

[0028] 10. Through the high-voltage switchgear, 10kV~110kV high voltage can be directly supplied to the heating wire to generate heat, realizing high-power electrothermal conversion and large-capacity thermal energy storage; through the PLC control cabinet, the operation of the electrical equipment of the entire thermal energy storage system can be controlled, making it convenient to use.

[0029] The thermal energy storage system designed in this utility model can generate and store heat using high-voltage electricity during off-peak hours through a high-voltage control cabinet and thermal storage solid. The high-temperature hot air in the insulation cover enters the steam generator, where it heats the low-temperature water in the heat exchange tube in the low-temperature heat exchange zone and forms a steam-water mixture in the high-temperature evaporation zone. The mixture is then separated into saturated steam by the steam-water separator for use by the heating user. This system can achieve peak shaving and valley filling of electricity consumption and has a high thermal energy utilization rate. Attached Figure Description

[0030] Figure 1 : A simplified schematic diagram of this thermal energy storage system;

[0031] Figure 2 A simplified schematic diagram of a steam generator;

[0032] Wherein: 1—Solid heat storage body; 2—High-voltage control cabinet; 21—High-voltage switch cabinet; 22—PLC control cabinet; 3—Steam generator; 31—Air inlet; 32—Air return outlet; 33—High-temperature evaporation section; 34—Low-temperature heat exchange zone; 35—Second water pump; 36—Heat exchange tube; 37—Condenser tube; 4—Heat exchange fan; 5—Steam-water separator; 6—Deaerator pump; 7—Soft water device; 71—Soft water tank; 72—Soft water unit; 8—First water pump; 9—Steam distribution cylinder; 10—Heat user. Detailed Implementation

[0033] The embodiments of the present application will be described in detail below, wherein identical or similar reference numerals denote identical or similar elements throughout the present application. The embodiments described below are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0034] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0036] The present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0037] The present application relates to a heat storage and energy storage system, which can be used for industrial heat supply. Through the high-voltage control cabinet 2 and the heat storage solid, heat can be generated and stored during the low electricity consumption period, the high-temperature hot gas in the heat preservation cover enters the steam generator 3, the low-temperature water of the heat exchange pipe 36 is heated in the low-temperature heat exchange area 34, and the steam-water mixture formed by heat exchange in the high-temperature evaporation area 33 is separated by the steam-water separator 5 to obtain saturated steam for heat supply users, which can realize peak shaving and valley filling of electricity consumption, has high heat energy utilization rate, lower heat supply cost, and has high popularization value.

[0038] A heat storage and energy storage system, specifically, Figures 1-2As shown, it comprises a solid heat accumulator 1, a high-voltage control cabinet 2, a steam generator 3, a steam-water separator 5 and a heat exchange fan 4. The solid heat accumulator 1 comprises a heat preservation cover, heat storage solids and electric heating wires in thermal conduction with the heat storage solids. The high-voltage control cabinet 2 is used for configuring high-voltage electric connection of the electric heating wires. The high-voltage range includes 10kv-110kv, and the present application is high-power electric heating conversion and large-capacity heat storage. The steam generator 3 comprises an air inlet 31 and an air return 32 which are connected to the heat preservation cover to form a circulating air path, a high-temperature evaporation zone 33 and a low-temperature heat exchange zone 34 which are arranged in sequence on the circulating air path, and a heat exchange pipe 36 which passes through the low-temperature heat exchange zone 34 and the high-temperature evaporation zone 33 in sequence, and is used for heating water flowing through the low-temperature heat exchange zone 34 to form a steam-water mixed state flowing out through the high-temperature evaporation zone 33. The high-temperature evaporation zone 33 is close to the air inlet 31, and the air return 32 is between the air inlet 31 and the heat exchange air duct. The steam-water separator 5 is connected to the steam generator 3 by a pipeline, and is used for separating the steam-water mixed state to saturated steam and liquid water which are delivered to a heat user 10. The liquid water is returned to the steam generator 3 by a pipeline for circulation. The heat exchange fan 4 is arranged on the circulating air path, and is used for driving high-temperature hot air in the heat preservation cover to enter the steam generator 3 to form circulation.

[0039] The present application can effectively manage and control the high-voltage power supply through the high-voltage control cabinet 2, and ensure stable output (power distribution) of the power supply through the built-in multiple safety protection devices, so as to provide continuous and stable power support for the solid heat accumulator 1. The heat energy is stored through the solid heat accumulator 1 by using valley electricity to produce heat, and the factory can be heated at peak electricity. The stable 0.8-1.0MPa saturated steam can be generated through the efficient steam generator 3, and the whole system can stably meet the steam demand in the process of the lithium battery production enterprise, so as to realize the "peak load shifting" of the electric quantity and the load.

[0040] In a preferred embodiment, as shown in Figure 2 The heat exchange pipe 36 is provided with an oxygen removal pump 6 which is located between the low-temperature heat exchange zone 34 and the high-temperature evaporation zone 33, and is used for removing oxygen and other gases in the heat exchange pipe 36 to ensure the quality of the feed water, avoid corrosion of the equipment and the pipeline, and prolong the service life. The oxygen removal pump 6 is arranged downstream of the low-temperature heat exchange zone 34, and can remove oxygen after utilizing the heat of the low-temperature heat exchange zone 34, so as to improve the heat energy utilization.

[0041] It is worth noting that the heat exchange pipe 36 can not need the oxygen removal pump 6, and can be directly connected to the steam-water separator 6 after passing through the high-temperature evaporation zone 33 in the steam generator 3 in the reverse circulating air path.

[0042] In a further embodiment, as shown in Figure 2As shown, the heat exchange pipe 36 is provided with a second water pump 35, which is located between the low-temperature heat exchange area 34 and the high-temperature evaporation area 33, and can be located between the deaeration pump 6 and the high-temperature evaporation area 33 when the deaeration pump 6 is used, to provide power for the warm water in the low-temperature heat exchange area 34 to enter the high-temperature evaporation area 33, thereby ensuring the water circulation of heat exchange.

[0043] In some preferred embodiments, as shown in the drawings, Figure 1 The heat storage and energy storage system also includes a soft water device 7, which is connected to the heat exchange pipe 36, and is used to soften and store water sources. After the municipal water supply is softened, the mineral content in the municipal water supply is reduced to form a soft water storage, which is input into the steam generator 3 through the heat exchange pipe 36 to generate steam, thereby avoiding corrosion of various equipment and pipelines and prolonging the service life.

[0044] In some preferred embodiments, as shown in the drawings, Figure 2 The steam generator 3 is provided with a condensing pipe 37 at the bottom, which is connected to the soft water device 7, and is used to transport the condensed water to the heat exchange pipe 36 for heat exchange, thereby fully utilizing the residual heat in the condensed water and saving water.

[0045] Based on the heat storage and energy storage system also includes a soft water device 7, as shown in the drawings, Figure 1 The steam-water separator 5 is connected to the soft water device 7, and is used to transport the liquid water separated by the steam-water separator 5 to the soft water device 7, and then flow into the heat exchange pipe 36 for circulation. Alternatively, the condensing pipe 37 is connected to the soft water device 7, and the condensed water flows into the heat exchange pipe 36 through the soft water device 7 for reuse. The steam generator 3 is connected to the soft water device 7 through the condensing pipe 37, and the liquid water separated by the steam-water separator 5 is also connected to the soft water device 7, which can be concentrated and sent to the heat exchange pipe 36 for circulation, thereby fully utilizing the heat in the condensed water and the separated liquid water.

[0046] Based on the heat storage and energy storage system also includes a soft water device 7, as shown in the drawings, Figure 1 The soft water device 7 is provided with a first water pump 8 between the soft water device 7 and the heat exchange pipe 36, which is used to pump water to the heat exchange pipe 36. The soft water stored in the soft water device 7 is pumped into the heat exchange pipe 36 through the first water pump 8, thereby avoiding insufficient water power and reducing the water circulation efficiency of the system.

[0047] Based on the heat storage and energy storage system also includes a soft water device 7, as shown in the drawings, Figure 1 The soft water device 7 includes a soft water tank 71 and a soft water device 72 connected to the soft water tank 71, and the soft water tank 71 is connected to the first water pump 8. The water inlet of the soft water device 72 is used to connect to the municipal water source. The soft water device 7 has a simple structure, and the municipal water source is filtered and softened by the soft water device 72 to form soft water, which is stored in the soft water tank 71. The soft water tank 71 can also store condensed water and separated liquid water, which is convenient to use.

[0048] In some preferred embodiments, as shown in the drawings,Figure 1 As shown, the heat storage and energy storage system further comprises a distributing cylinder 9, which is connected with the steam-water separator 5 through a pipeline, and is used for regulating and controlling the saturated steam delivered to the plurality of heat users 10. The distributing cylinder 9 can regulate and control the flow of the saturated steam delivered according to the heat demand of each department of the factory, and a condensing pipe 37 can be arranged to communicate with the heat exchange pipe 36 to return the condensed water to the heat exchange.

[0049] In some embodiments, the heat storage solid is specifically described, and the heat storage solid is provided with a heat transfer hole, and the heat transfer hole is provided with the electric heating wire; the heat storage solid is installed with the electric heating wire through the heat transfer hole, has high heat transfer efficiency, and realizes rapid storage of heat on the heat storage solid. Preferably, the heat storage solid comprises a magnesium brick material, which has low cost, high heat storage density, heat storage density of more than 5 times of water per unit volume, heat storage temperature of 600-800℃, and good heat storage performance.

[0050] In some embodiments, the high-voltage control cabinet 2 is described, which comprises a high-voltage switch cabinet 21 and a PLC control cabinet 22 connected with the solid heat storage body 1. The high-voltage switch cabinet 21 is used for power distribution of the solid heat storage body 1, provides power management and safety protection, the PLC control cabinet 22 is used for detecting and regulating the action of the electric elements of the solid heat storage body 1, and real-time detects and monitors the working state and parameters of the solid heat storage body 1 and the electrical equipment involved in the system, and automatically adjusts and controls the system according to the change of the heat load of the end user. The high-voltage switch cabinet 21 can make the system use 10-110KV high-voltage power to distribute power for the electric heating wire in a safe range, the PLC control cabinet 22 has a communication interface, can accept information feedback of the solid heat storage body 1, and is connected with the FMCS (plant monitoring system), so as to realize efficient regulation and control of the heat storage and energy storage system.

[0051] The working principle of the heat storage and energy storage system is as follows: in the off-peak period, the high-voltage control cabinet 2 uses high-voltage power to supply power for the electric heating wire to produce heat, and the heat storage solid stores heat; in the peak period, the heat production is stopped, the high-temperature hot gas in the heat preservation cover is blown into the steam generator 3 by the heat exchange fan 4, the water in the heat exchange pipe 36 is heated to medium temperature in the low-temperature heat exchange zone 34, and then the gas is discharged by the deaerating pump 6, and then the water is heated to form a steam-water mixture in the high-temperature evaporation zone 33, the steam-water mixture is separated into saturated steam and liquid water by the steam-water separator 5, the saturated steam is delivered to the heat users 10 through the distributing cylinder 9, and the liquid water is returned to the heat exchange pipe 36 for heat exchange and recycling.

[0052] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A thermal energy storage system, characterized by: include, Solid heat storage body (1), the solid heat storage body (1) includes a heat insulation cover, a heat storage solid disposed in the heat insulation cover and an electric heating wire that conducts heat with the heat storage solid; High-voltage control cabinet (2), the high-voltage control cabinet (2) is used to configure high-voltage electrical connection heating wire; The steam generator (3) includes an air inlet (31) and an air outlet (32) that connect to the heat insulation cover to form a circulating air path, a high-temperature evaporation zone (33) and a low-temperature heat exchange zone (34) that are sequentially arranged on the circulating air path, and a heat exchange tube (36) that passes through the low-temperature heat exchange zone (34) and the high-temperature evaporation zone (33) in sequence, for heating water through the low-temperature heat exchange zone (34) and then forming a steam-water mixture that flows out through the high-temperature evaporation zone (33); A steam-water separator (5) is connected to a steam generator (3) via a pipeline. It is used to separate the steam-water mixture into saturated steam that is delivered to the heat user (10) and liquid water that is returned to the steam generator (3). Heat exchange fan (4) is installed on the circulating air path and is used to drive the high temperature hot air in the heat insulation cover into the steam generator (3).

2. A thermal mass energy storage system as claimed in claim 1, wherein: The heat exchange tube (36) is equipped with a deaerator (6) located between the low-temperature heat exchange zone (34) and the high-temperature evaporation zone (33).

3. A thermal mass energy storage system as claimed in claim 2, wherein: The heat exchange tube (36) is equipped with a second water pump (35) located between the low-temperature heat exchange zone (34) and the high-temperature evaporation zone (33).

4. A thermal mass energy storage system as claimed in claim 1, wherein: It also includes a water softening device (7) connected to the heat exchange tube (36) for softening and storing water.

5. A thermal mass energy storage system as claimed in claim 4, wherein: The steam generator (3) is equipped with a condenser pipe (37) at the bottom, which is connected to the water softener (7) to transport the condensed water to the heat exchanger pipe (36) for heat exchange; the steam-water separator (5) is connected to the water softener (7) to transport the separated liquid water.

6. A thermal mass energy storage system as claimed in claim 4, wherein: A first water pump (8) is provided between the soft water device (7) and the heat exchange tube (36) for pumping water into the heat exchange tube (36).

7. A thermal mass energy storage system as claimed in claim 6, wherein: The water softening device (7) includes a water softener (72) and a water softener tank (71) connected to the water softener (72), and the water softener tank (71) is connected to the first water pump (8).

8. A thermal mass energy storage system as claimed in any one of claims 1 to 7, wherein: It also includes a steam distribution cylinder (9), which is connected to a steam-water separator (5) and is used to regulate the delivery of saturated steam to multiple heat users (10).

9. A thermal mass energy storage system as claimed in claim 1, wherein: The heat storage solid is provided with heat transfer holes, and the heating wire is provided inside the heat transfer holes; the heat storage solid includes magnesium brick material.

10. A thermal mass energy storage system as claimed in claim 1, wherein: The high-voltage control cabinet (2) includes a high-voltage switch cabinet (21) and a PLC control cabinet (22) that are connected to the solid heat storage body (1) by a circuit. The high-voltage switch cabinet (21) is used to distribute power to the solid heat storage body (1), and the PLC control cabinet (22) is used to detect and regulate the operation of the electrical components of the solid heat storage body (1).

Images