A system for supplying heat by coupling steam pressure boosting with off-peak power storage

Abstract

The utility model mentions a kind of valley power heat storage coupling steam pressure boosting heat supply system, including electric boiler and heat storage tank, electric boiler generates high-temperature steam, electric boiler is communicated with the inside of heat storage tank by steam connecting pipeline, high-temperature steam is stored into the inside of heat storage tank by the form of high-temperature high-pressure saturated water, second control valve is arranged between electric boiler and heat storage tank, circulating passage is formed by electric boiler and heat storage tank with second control valve, water supply mechanism is communicated with electric boiler and the inside of heat storage tank, steam-water separator is communicated on heat storage tank, third control valve and fourth control valve are arranged between heat storage tank and steam-water separator, fourth control valve is connected with steam compression passage in parallel, to continuously transport steam in heat storage tank to gas separator, in general, the utility model has the advantages of convenient operation, high heat storage efficiency, reduce energy cost, no environmental pollution, save continuous supply steam and long service life.

Description

Technical Field

[0001] This utility model belongs to the technical field of factory steam pressure boosting and heating equipment, specifically relating to a valley electricity thermal storage coupled steam pressure boosting and heating system. Background Technology

[0002] "Off-peak electricity" is a specific time-of-use pricing policy, referring to the period when the grid load is lowest and the power supply is relatively abundant, usually corresponding to late night to the next morning. Boilers (mainly electric boilers or some boiler systems requiring auxiliary power) are major consumers of electricity, and the off-peak electricity policy provides an excellent opportunity to reduce boiler operating costs. Currently, in areas requiring heating, there are devices using electric boilers to generate steam using off-peak electricity. However, the heating equipment and the heat storage equipment are operated separately, without unified control through a complete system. Furthermore, the current heat storage equipment also has some problems. When the pressure in the heat storage tank drops to near the required steam pressure, steam can no longer be generated. This not only results in low heat storage efficiency but also necessitates stopping the entire heat storage process when the heat storage tank malfunctions, leading to high maintenance costs and affecting the normal operation of the entire system.

[0003] The invention patent application with application number "CN202410796318.9" mentions "a new type of energy supply system applied to power plants, which provides water through boiler feedwater and uses electricity to generate saturated steam. The steam is supplied to the power plant's generator boiler for start-up and warm-up through steam connection pipelines. The saturated steam generated by the electrode boiler is heated to superheated steam by electric heaters and supplied to industrial parks. The saturated steam generated by the electrode boiler heats the heating network water in the plant's heating pipe network in the shell-and-tube heat exchanger. The electrode boiler is used as the power plant's start-up boiler, solving the pollutant and carbon emission problems of oil or gas boilers, providing industrial steam to surrounding power plants without affecting the unit's operating performance." However, it does not involve how to specifically regulate the heat storage tanks, nor does it have a specific technical solution for alternating control of the two heat storage tanks.

[0004] Therefore, there is an urgent need for a valley-electricity thermal storage coupled with steam pressure boosting heating system to solve the current problems of being unable to meet the factory's annual steam demand, high energy operating costs, and the inability to maintain continuous steam supply under high temperature and high pressure conditions with reduced saturated water pressure. Utility Model Content

[0005] In view of this, this utility model proposes a valley electricity thermal storage coupled steam pressure boosting heating system, which is applied to the technical field of factory steam pressure boosting heating equipment, and solves the existing technical problems of being unable to meet the factory's annual steam demand, high energy operating costs, and inability to maintain continuous steam supply under high temperature and high pressure saturated water pressure reduction conditions.

[0006] To achieve the above-mentioned technical objectives, the specific technical solution adopted by this utility model is as follows: A valley-time electricity storage coupled steam pressurization heating system includes an electric boiler and a heat storage tank. The electric boiler generates high-temperature steam and is connected to the interior of the heat storage tank via a steam connection pipe. The high-temperature steam enters the heat storage tank and is stored in the form of high-temperature, high-pressure saturated water. A second control valve is installed between the electric boiler and the heat storage tank, forming a circulation path between the electric boiler and the heat storage tank through the second control valve. A water replenishment mechanism is connected to the interior of the electric boiler, thereby replenishing water to the electric boiler and the heat storage tank under the control of the second control valve. A steam-water separator is connected to the heat storage tank, which separates steam and condensate to meet the factory's steam production needs. A third control valve and a fourth control valve are installed between the heat storage tank and the steam-water separator. The fourth control valve is connected in parallel with a steam compression passage, which facilitates the direct delivery of steam from the heat storage tank to the steam-water separator or to a gas separator driven by a steam compressor.

[0007] Furthermore, a fifth control valve, a sixth control valve, and a steam compressor are installed on the steam compression path. The fourth, fifth, and sixth control valves control whether the steam in the heat storage tank is delivered to the steam-water separator through the steam compression path. When the electric boiler is shut down, the high-temperature and high-pressure saturated water in the heat storage tank is converted into steam through flash evaporation to meet production needs.

[0008] Furthermore, the steam compressor is located between the fifth and sixth control valves, and the steam compressor is connected to a motor that provides power.

[0009] Furthermore, a steam delivery pipe connected to the steam-water separator is installed on the steam connection pipe. A first control valve is installed on the steam delivery pipe. The connection point between the steam delivery pipe and the steam connection pipe is between the electric boiler and the second control valve. Thus, through the control of the first control valve and the second control valve, the electric boiler can generate steam using off-peak electricity during off-peak hours. Part of the steam is used for production, and the other part of the steam enters the heat storage tank.

[0010] By adopting the above technical solution, this utility model can also bring the following beneficial effects: 1. This utility model discloses a valley electricity thermal storage coupled steam pressure boosting heating system. Through an electric boiler, steam connection pipe, steam transmission pipe and steam-water separator, the steam generated by the electric boiler can be directly used for production to meet the needs of the factory. During the valley electricity period, water is replenished to the electric boiler and thermal storage tank through a water replenishment mechanism. Part of the steam is stored in the form of high temperature and high pressure saturated water in the thermal storage tank. During the peak electricity period, the electric boiler is shut down and the corresponding steam is discharged through the thermal storage tank to meet the production needs. It has the advantages of reducing energy costs, not causing pollution to the environment and providing a continuous supply of steam.

[0011] 2. This utility model discloses a valley-electricity thermal storage coupled steam pressure boosting heating system. A second control valve controls whether the thermal storage tank and the electric boiler form a circulation loop. Third and fourth control valves control whether the thermal storage tank directly discharges steam through a steam-water separator. Fifth and sixth control valves control whether the high-temperature, high-pressure saturated water in the thermal storage tank can no longer generate steam due to insufficient pressure difference. A steam compressor then boosts the low-pressure steam (0.1~0.3MPa) generated in the thermal storage tank to the user's required pressure, achieving continuous steam supply. The first and second control valves facilitate the use of valley-electricity power to generate steam (pressure 1.5~2.5MPa) during valley-electricity periods. A portion of the steam is used for production, while the remaining portion enters the thermal storage tank for storage as high-temperature, high-pressure saturated water (pressure 1.5~2.4MPa). This system has the advantages of simple operation, high thermal storage efficiency, and extended equipment lifespan. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a valley electricity thermal storage coupled steam pressure boosting heating system mentioned in this utility model; In the diagram: 1. Electric boiler; 2. Heat storage tank; 3. Water supply mechanism; 4. Steam connection pipe; 5. Steam-water separator; 6. Steam delivery pipe; 7. Steam compressor; 8. Motor; 11. First control valve; 12. Second control valve; 13. Third control valve; 14. Fourth control valve; 15. Fifth control valve; 16. Sixth control valve. Detailed Implementation

[0014] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0015] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. This utility model can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0017] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0018] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0019] In one embodiment of this utility model, such as Figure 1As shown, a valley-electricity thermal storage coupled steam pressurization heating system includes an electric boiler 1 and a thermal storage tank 2. The electric boiler 1 generates high-temperature steam and is connected to the interior of the thermal storage tank 2 through a steam connection pipe 4. The high-temperature steam enters the interior of the thermal storage tank 2 and is stored in the form of high-temperature, high-pressure saturated water. A second control valve 12 is provided between the electric boiler 1 and the thermal storage tank 2, forming a circulation path between the electric boiler 1 and the thermal storage tank 2 through the second control valve 12. A water replenishment mechanism 3 is connected to the interior of the electric boiler 1 and the thermal storage tank 2, thereby replenishing water to the electric boiler 1 and the thermal storage tank 2 under the control of the second control valve 12. A steam-water separator 5 is connected to the thermal storage tank 2. The steam-water separator 5 separates steam and condensate to meet the factory's steam production needs. A third control valve 13 and a fourth control valve 14 are provided between the thermal storage tank 2 and the steam-water separator 5. The fourth control valve 14 is connected in parallel with a steam compression passage, which facilitates the direct delivery of steam in the thermal storage tank 2 to the steam-water separator 5 or to the gas separator after being driven by a steam compressor 7. A steam conveying pipe 6 connected to the steam-water separator 5 is provided on the steam connection pipe 4. A first control valve 11 is provided on the steam conveying pipe 6. The connection position between the steam conveying pipe 6 and the steam connection pipe 4 is between the electric boiler 1 and the second control valve 12. Thus, under the control of the first control valve 11 and the second control valve 12, the electric boiler 1 uses off-peak electricity to generate steam during off-peak electricity periods. Part of the steam is used for production, and the other part of the steam enters the heat storage tank 2.

[0020] The steam compression passage is equipped with a fifth control valve 15, a sixth control valve 16, and a steam compressor 7. The fourth control valve 14, fifth control valve 15, and sixth control valve 16 control whether the steam in the heat storage tank 2 is selectively transported to the steam-water separator 5 via the steam compression passage. When the electric boiler 1 is shut down, the high-temperature, high-pressure saturated water in the heat storage tank 2 is converted into steam through flash evaporation to meet production requirements. The steam compressor 7 is located between the fifth control valve and the sixth control valve 16, and is connected to a motor 8 that provides power.

[0021] In use, this invention replenishes water to the electric boiler 1 and the heat storage tank 2 via the water replenishment mechanism 3. At night, the electric boiler 1 uses off-peak electricity to generate steam (pressure 1.5~2.5MPa). The first control valve 11 and the second control valve 12 are open, while the third control valve 13, the fourth control valve 14, the fifth control valve 15, and the sixth control valve 16 are closed. A portion of the steam generated by the electric boiler 1 is used for production, and the remaining steam enters the heat storage tank 2, where it is stored as high-temperature, high-pressure saturated water (pressure 1.5~2.4MPa). During peak electricity hours the following day, the electric boiler 1 is shut down, and the first control valve 11, the second control valve 12, the fifth control valve 15, and the sixth control valve 16 are closed. The third control valve 13 and the fourth control valve 14 are opened. The high-temperature, high-pressure saturated water in the heat storage tank 2 generates steam through flash evaporation to supply the production needs. When the pressure in the heat storage tank 2 approaches the steam pressure required by the user, the high-temperature, high-pressure saturated water in the heat storage tank 2 cannot continue to generate steam due to insufficient pressure difference. At this time, the fourth control valve 14 closes, and the third control valve 13, the fifth control valve 15, and the sixth control valve 16 open. The motor 8 starts working, driving the steam compressor 7 to work and raise the low-pressure steam (0.1~0.3MPa) generated in the heat storage tank 2 to the pressure required by the user, so as to achieve continuous steam supply to the user. When the pressure in the heat storage tank 2 is lower than the minimum pressure required by the steam compressor 7, all control valves of the system close. The next working cycle begins during off-peak electricity hours at night. In this way, the heat storage tank 2 stores heat during off-peak electricity hours and releases steam during peak electricity hours. In summary, this utility model has the advantages of convenient operation, high heat storage efficiency, reduced energy costs, no environmental pollution, continuous steam supply, and long service life.

[0022] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A valley electricity thermal storage coupled steam pressure boosting heating system, characterized in that: The system includes an electric boiler (1), a heat storage tank (2), and a water supply mechanism (3). The electric boiler (1) generates high-temperature steam and is connected to the interior of the heat storage tank (2) via a steam connection pipe (4). The high-temperature steam enters the heat storage tank (2) and is stored as high-temperature, high-pressure saturated water. A second control valve (12) is provided between the electric boiler (1) and the heat storage tank (2). The electric boiler (1) forms a circulation path with the heat storage tank (2) through the second control valve (12). The water supply mechanism (3) is connected to the interior of the electric boiler (1), thereby controlling the second control valve (12). The electric boiler (1) and the heat storage tank (2) are replenished with water. The heat storage tank (2) is connected to a steam-water separator (5). The steam-water separator (5) separates steam and condensate to meet the factory's steam production needs. A third control valve (13) and a fourth control valve (14) are provided between the heat storage tank (2) and the steam-water separator (5). The fourth control valve (14) is connected in parallel with a steam compression passage, so that the steam in the heat storage tank (2) can be directly transported to the steam-water separator (5) or driven by a steam compressor (7) to be transported to a gas separator.

2. The off-peak electricity thermal storage coupled steam pressure boosting heating system according to claim 1, characterized in that: The steam compression passage is equipped with a fifth control valve (15), a sixth control valve (16), and a steam compressor (7). The steam in the heat storage tank (2) is selectively transported to the steam-water separator (5) through the steam compression passage by the control of the fourth control valve (14), the fifth control valve (15), and the sixth control valve (16). When the electric boiler (1) is shut down, the high-temperature and high-pressure saturated water in the heat storage tank (2) is converted into steam by flash evaporation to meet the production requirements.

3. The off-peak electricity thermal storage coupled steam pressure boosting heating system according to claim 2, characterized in that: The steam compressor (7) is located between the fifth control valve (15) and the sixth control valve (16), and the steam compressor (7) is connected to a motor (8) that provides power.

4. The off-peak electricity thermal storage coupled steam pressure boosting heating system according to claim 3, characterized in that: The steam connection pipe (4) is provided with a steam delivery pipe (6) that is connected to the steam-water separator (5). The steam delivery pipe (6) is provided with a first control valve (11). The connection position of the steam delivery pipe (6) and the steam connection pipe (4) is between the electric boiler (1) and the second control valve (12). Thus, through the control of the first control valve (11) and the second control valve (12), the electric boiler (1) can generate steam using off-peak electricity during off-peak electricity hours. Part of the steam is used for production, and the other part of the steam enters the heat storage tank (2).

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