CN212054838U - Steam concurrent heating air energy storage peak shaving system - Google Patents
Steam concurrent heating air energy storage peak shaving system Download PDFInfo
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- CN212054838U CN212054838U CN202020364113.0U CN202020364113U CN212054838U CN 212054838 U CN212054838 U CN 212054838U CN 202020364113 U CN202020364113 U CN 202020364113U CN 212054838 U CN212054838 U CN 212054838U
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Abstract
The utility model discloses a steam heat-supplementing air energy-storage peak-shaving system, which consists of a compressor, an air cooler, a gas-liquid conversion device, a liquid air storage tank, a heater, an expander, a turbine unit, a condenser and a control valve; the operation method of the system comprises an energy storage mode and an energy release mode, wherein the energy release mode is further divided into two working modes; the utility model discloses consuming steam turbine unit generated energy drive compressor compressed air under energy storage mode, reducing coal-fired unit load on the net, can select series connection or parallel mode to utilize steam heating low temperature air to promote the expander electricity generation under the energy release mode, promote coal-fired unit load on the net, compressor operating temperature is low, the unit consumption is few, the concurrent heating in-process make full use of the latent heat and the partial sensible heat of unit steam, realized the step utilization of steam, reduced unit electricity generation coal consumption.
Description
Technical Field
The utility model belongs to the technical field of the energy storage peak shaving, concretely relates to steam concurrent heating air energy storage peak shaving system is applicable to and uses coal-fired unit as typical various thermal power plants, can improve the comprehensive utilization efficiency of coal-fired unit steam, improves the flexibility of coal-fired unit simultaneously.
Background
At present, renewable energy sources such as wind energy, solar energy and the like in China are rapidly developed year by year, in addition, the electricity consumption of the whole society is increased year by year, the electricity peak-valley difference of a power grid is increased day by day, and the requirements of the power grid on the peak regulation times and the depth of a coal-fired unit are greatly improved.
The technology for improving the peak regulation capacity of the coal-fired unit mainly comprises an electric boiler heat storage technology, a water tank heat storage technology, a steam turbine steam flow reconstruction technology, an electrochemical battery energy storage technology and the like, wherein electric energy is converted into heat energy for heating through the electric boiler heat storage technology, the peak regulation capacity is high, but the energy quality is greatly reduced, and the electric boiler heat storage technology is only suitable for a cogeneration unit, the water tank heat storage technology and the steam turbine steam flow reconstruction technology have the advantages of good heat economy, relatively low investment, limited peak regulation capacity and suitability for the cogeneration unit, the electrochemical battery energy storage technology has the advantages of quick response, small volume and short construction period, but short service life, high average cost and high safety risk, and whether the electric boiler is suitable for constructing large-scale energy storage and still needs engineering demonstration verification.
Disclosure of Invention
For overcoming the not enough of current coal-fired unit peak regulation technique, the utility model provides a steam concurrent heating air energy storage peak regulation system and method, consume turboset generated energy drive compressor compressed air under the energy storage mode, reduce coal-fired unit load on the net, can select series connection or parallel mode to utilize steam heating low temperature air to promote the expander electricity generation under the energy release mode, promote coal-fired unit load on the net, compressor operating temperature is low, the unit consumption is few, make full use of the latent heat and the partial sensible heat of unit steam among the concurrent heating process, the step utilization of steam has been realized, the unit electricity generation coal consumption has been reduced.
In order to achieve the above purpose, the utility model adopts the following technical scheme.
A steam heat supplementing air energy storage peak shaving system is composed of a compressor 1, an air cooler 2, a gas-liquid conversion device 3, a liquid air storage tank 4, a multi-stage heater, a multi-stage expander, a turbine unit 9, a condenser 10, a first valve 11, a second valve 12, a third valve 13, a fourth valve 14 and a fifth valve 15;
the multistage heaters correspond to the multistage expanders one by one, and the corresponding expanders are connected in series behind each stage of heater; part or all of the electric quantity generated by the turboset 9 is used for driving the compressor 1 to rotate, an interstage outlet of the compressor 1 is sequentially communicated with an inlet of the air cooler 2, an outlet of the air cooler 2 and an interstage inlet of the compressor 1, and a final-stage outlet of the compressor 1 is sequentially communicated with a cooling liquefaction side inlet of the gas-liquid conversion device 3, a cooling liquefaction side outlet of the gas-liquid conversion device 3 and an inlet of the liquid air storage tank 4; if the system is provided with a two-stage heater and a two-stage expander, an outlet of the liquid air storage tank 4 is sequentially communicated with a cold energy recovery side inlet of the gas-liquid conversion device 3, a cold energy recovery side outlet of the gas-liquid conversion device 3, a low-temperature side inlet of the first-stage heater 5, a low-temperature side outlet of the first-stage heater 5, the first-stage expander 6, a low-temperature side inlet of the second-stage heater 7, a low-temperature side outlet of the second-stage heater 7 and the second; an outlet of a medium pressure cylinder in the steam turbine set 9 is communicated with a high-temperature side inlet of a primary heater 5 through a first valve 11 and is communicated with a high-temperature side inlet of a secondary heater 7 through a second valve 12, a fourth valve 14 is arranged between the high-temperature side outlet of the primary heater 5 and the high-temperature side inlet of the secondary heater 7, the high-temperature side outlet of the primary heater 5 is communicated with an outlet of a condenser 10 through a third valve 13 and a fifth valve 15 in sequence, the high-temperature side outlet of the secondary heater 7 is communicated with an outlet of the condenser 10 through the fifth valve 15, and an outlet of a low pressure cylinder in the steam turbine set 9 is communicated with the inlet of the condenser; the system is suitable for a cogeneration unit and a straight condensing unit, the air compressor in the system has low working temperature and low power consumption, and the energy storage efficiency is improved while the power generation flexibility of the coal-fired unit is improved.
The air cooler 2 adopts a multi-stage interstage cooling process, air enters the air cooler 2 for cooling after being compressed, and the cooled air enters the compressor 1 again to increase pressure.
The steam turbine set 9 comprises a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder which are connected in sequence.
The first valve 11 and the second valve 12 are communicated with an outlet of an intermediate pressure cylinder in the steam turbine set 9, or other steam extraction positions are optimally screened according to the condition of the generator set.
The system makes full use of the latent heat and partial sensible heat of the steam of the unit in the heat supplementing process, realizes the gradient utilization of the steam, and reduces the coal consumption of the power generation of the unit.
The operation method of the steam concurrent heating air energy storage peak shaving system comprises an energy storage mode and an energy release mode, and specifically comprises the following steps:
an energy storage mode: the energy storage mode is started when the power consumption of the power grid is low and the coal-fired unit is required to reduce the power generation load, and the first valve 11, the second valve 12 and the fifth valve 15 are closed; the electric quantity generated by the steam turbine set 9 is used for driving the compressor 1 to compress air, the air with raised temperature and pressure enters the air cooler 2 through an interstage outlet to be cooled by the environment, the cooled air enters the compressor 1 again through an interstage inlet to raise the pressure, the normal-temperature high-pressure air at the final stage outlet of the compressor 1 is cooled and liquefied through the gas-liquid conversion device 3, and the low-temperature liquid air enters the liquid air storage tank 5 to be stored;
energy release mode: the energy release mode is started when the power consumption peak of the power grid needs the coal-fired unit to lift the power generation load, and the energy release mode is specifically divided into two working modes:
the first mode of operation: opening the first valve 11, the second valve 12, the third valve 13 and the fifth valve 15, and closing the fourth valve 14; the low-temperature liquid air flows out of the liquid air storage tank 4, normal-temperature high-pressure air generated after cold energy recovery is carried out by the gas-liquid conversion device 3 enters the primary heater 5 to be heated, then enters the primary expander 6 to be expanded to generate power, then enters the secondary heater 7 to be heated, and then enters the secondary expander 8 to be expanded to generate power, the outlet of the secondary expander 8 is normal-pressure normal-temperature air which is discharged into the surrounding environment, steam enters the primary heater 5 and the secondary heater 7 to heat the air through the first valve 11 and the second valve 12 respectively, and steam condensate water is conveyed to the outlet of the condenser 10 through the fifth valve 15;
a second operation mode of opening the first valve 11, the fourth valve 14 and the fifth valve 15, and closing the second valve 12 and the third valve 13; the low temperature liquid state air flows out from the liquid air storage tank 4, the normal temperature high pressure air generated after cold energy recovery is carried out by the gas-liquid conversion device 3 enters the primary heater 5 to be heated, then enters the primary expander 6 to be expanded and generated, then enters the secondary heater 7 to be heated, then enters the secondary expander 8 to be expanded and generated, the outlet of the secondary expander 8 is normal pressure normal temperature air, the ambient environment is discharged, the steam enters the primary heater 5 to heat the air through the first valve 11, then enters the secondary heater 7 to heat the air through the fourth valve 14, and the steam condensate water is conveyed to the outlet of the condenser 10 through the fifth valve 15.
Compared with the prior art, the utility model discloses possess following advantage:
the utility model discloses steam concurrent heating air energy storage peak shaving system, consume turboset generated energy drive compressor compressed air under the energy storage mode, reduce coal-fired unit load of surfing the net, can select series connection or parallel mode to utilize steam heating low temperature air to promote the expander electricity generation under the energy release mode, promote coal-fired unit load of surfing the net, compressor operating temperature is low, the unit consumption is few, concurrent heating in-process make full use of the latent heat and the partial sensible heat of unit steam, the step utilization of steam has been realized, the unit electricity generation coal consumption has been reduced.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
In the figure:
1-compressor 2-air cooler 3-gas-liquid conversion device 4-liquid air storage tank 5-primary heater 6-primary expander 7-secondary heater 8-secondary expander 9-turbine unit 10-condenser 11-first valve 12-second valve 13-third valve 14-fourth valve 15-fifth valve
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description, wherein the detailed description is provided for the purpose of illustration only and is not intended to be limiting.
As shown in fig. 1, the steam-supplemented air energy-storage peak-shaving system according to this embodiment includes a compressor 1, an air cooler 2, a gas-liquid conversion device 3, a liquid air storage tank 4, a primary heater 5, a primary expander 6, a secondary heater 7, a secondary expander 8, a turbine unit 9, a condenser 10, a first valve 11, a second valve 12, a third valve 13, a fourth valve 14, and a fifth valve 15.
Part or all of the electric quantity generated by the turboset 9 is used for driving the compressor 1 to rotate, an interstage outlet (a port in figure 1) of the compressor 1 is sequentially communicated with an inlet of the air cooler 2, an outlet of the air cooler 2 and an interstage inlet (b port in figure 1) of the compressor 1, and a final-stage outlet (c port in figure 1) of the compressor 1 is sequentially communicated with a cooling liquefaction side inlet of the gas-liquid conversion device 3, a cooling liquefaction side outlet of the gas-liquid conversion device 3 and an inlet of the liquid air storage tank 4; meanwhile, the outlet of the liquid air storage tank 4 is sequentially communicated with a cold energy recovery side inlet of the gas-liquid conversion device 3, a cold energy recovery side outlet of the gas-liquid conversion device 3, a low-temperature side inlet of the primary heater 5, a low-temperature side outlet of the primary heater 5, the primary expander 6, a low-temperature side inlet of the secondary heater 7, a low-temperature side outlet of the secondary heater 7 and the secondary expander 8; an outlet of an intermediate pressure cylinder in the steam turbine set 9 is communicated with a high-temperature side inlet of a primary heater 5 through a first valve 11 and is communicated with a high-temperature side inlet of a secondary heater 7 through a second valve 12, a fourth valve 14 is arranged between the high-temperature side outlet of the primary heater 5 and the high-temperature side inlet of the secondary heater 7, the high-temperature side outlet of the primary heater 5 is communicated with an outlet of a condenser 10 through a third valve 13 and a fifth valve 15 in sequence, the high-temperature side outlet of the secondary heater 7 is communicated with an outlet of the condenser 10 through the fifth valve 15, and an outlet of a low-pressure cylinder in the steam turbine set 9 is communicated with the inlet of the. The utility model discloses the system is applicable to combined heat and power units and pure unit of congealing, and the air compressor's in the system operating temperature is low, and the consumption is little, has still improved energy storage efficiency when promoting coal-fired unit electricity generation flexibility, has good using value.
The utility model relates to a steam concurrent heating air energy storage peak shaving system can be according to following energy storage mode and the operation of energy release mode.
An energy storage mode: the energy storage mode is started when the power consumption of the power grid is low and the coal-fired unit is required to reduce the power generation load, and the first valve 11, the second valve 12 and the fifth valve 15 are closed; the electric quantity generated by the steam turbine set 9 is used for driving the compressor 1 to compress air, the air with raised temperature and pressure enters the air cooler 2 through an interstage outlet (a port in figure 1) to be cooled by the environment, the cooled air enters the compressor 1 again through an interstage inlet (b port in figure 1) to raise the pressure, the normal-temperature high-pressure air at the final stage outlet (c port in figure 1) of the compressor 1 is cooled and liquefied through the gas-liquid conversion device 3, and the low-temperature liquid air enters the liquid air storage tank 5 to be stored.
Energy release mode: the energy release mode is started when the power consumption peak of a power grid and a coal-fired unit are needed to lift power generation load, and the energy release mode is specifically divided into two working modes.
The first mode of operation: opening the first valve 11, the second valve 12, the third valve 13 and the fifth valve 15, and closing the fourth valve 14; the low-temperature liquid air flows out of the liquid air storage tank 4, normal-temperature high-pressure air generated after cold energy recovery is carried out through the gas-liquid conversion device 3 enters the primary heater 5 to be heated, then enters the primary expander 6 to be expanded to generate power, then enters the secondary heater 7 to be heated, then enters the secondary expander 8 to be expanded to generate power, the outlet of the secondary expander 8 is normal-pressure normal-temperature air and is discharged into the surrounding environment, steam enters the primary heater 5 and the secondary heater 7 to heat the air through the first valve 11 and the second valve 12 respectively, and steam condensate water is conveyed to the outlet of the condenser 10 through the fifth valve 15.
A second operation mode of opening the first valve 11, the fourth valve 14 and the fifth valve 15, and closing the second valve 12 and the third valve 13; the low temperature liquid state air flows out from the liquid air storage tank 4, the normal temperature high pressure air generated after cold energy recovery is carried out by the gas-liquid conversion device 3 enters the primary heater 5 to be heated, then enters the primary expander 6 to be expanded and generated, then enters the secondary heater 7 to be heated, then enters the secondary expander 8 to be expanded and generated, the outlet of the secondary expander 8 is normal pressure normal temperature air, the ambient environment is discharged, the steam enters the primary heater 5 to heat the air through the first valve 11, then enters the secondary heater 7 to heat the air through the fourth valve 14, and the steam condensate water is conveyed to the outlet of the condenser 10 through the fifth valve 15.
Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit of the present invention. The insubstantial changes of the utility model when the design is used are all the acts of infringing the protection scope of the utility model.
Claims (3)
1. The utility model provides a steam concurrent heating air energy storage peak shaving system which characterized in that: the system comprises a compressor (1), an air cooler (2), a gas-liquid conversion device (3), a liquid air storage tank (4), a multi-stage heater, a multi-stage expander, a turbine unit (9), a condenser (10), a first valve (11), a second valve (12), a third valve (13), a fourth valve (14) and a fifth valve (15);
the multistage heaters correspond to the multistage expanders one by one, and the corresponding expanders are connected in series behind each stage of heater; part or all of electric quantity generated by the turboset (9) is used for driving the compressor (1) to rotate, an interstage outlet of the compressor (1) is sequentially communicated with an inlet of the air cooler (2), an outlet of the air cooler (2) and an interstage inlet of the compressor (1), and a final-stage outlet of the compressor (1) is sequentially communicated with a cooling liquefaction side inlet of the gas-liquid conversion device (3), a cooling liquefaction side outlet of the gas-liquid conversion device (3) and an inlet of the liquid air storage tank (4); if the system is provided with a two-stage heater and a two-stage expander, an outlet of the liquid air storage tank (4) is sequentially communicated with a cold energy recovery side inlet of the gas-liquid conversion device (3), a cold energy recovery side outlet of the gas-liquid conversion device (3), a low-temperature side inlet of the first-stage heater (5), a low-temperature side outlet of the first-stage heater (5), the first-stage expander (6), a low-temperature side inlet of the second-stage heater (7), a low-temperature side outlet of the second-stage heater (7) and the second-stage expander (8); an outlet of an intermediate pressure cylinder in the steam turbine set (9) is communicated with a high-temperature side inlet of a primary heater (5) through a first valve (11), and is communicated with a high-temperature side inlet of a secondary heater (7) through a second valve (12), a fourth valve (14) is arranged between the high-temperature side outlet of the primary heater (5) and the high-temperature side inlet of the secondary heater (7), the high-temperature side outlet of the primary heater (5) is communicated with an outlet of a condenser (10) through a third valve (13) and a fifth valve (15) in sequence, the high-temperature side outlet of the secondary heater (7) is communicated with an outlet of the condenser (10) through the fifth valve (15), and an outlet of a low-pressure cylinder in the steam turbine set (9) is communicated with an inlet of the condenser (10.
2. The steam supplementing hot air energy storage peak shaving system according to claim 1, wherein: the steam turbine set (9) comprises a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder which are sequentially connected.
3. The steam supplementing hot air energy storage peak shaving system according to claim 1, wherein: the first valve (11) and the second valve (12) are communicated with an outlet of a medium pressure cylinder in the steam turbine set (9), or steam extraction positions are screened according to the condition of the steam turbine set.
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| CN202020364113.0U CN212054838U (en) | 2020-03-20 | 2020-03-20 | Steam concurrent heating air energy storage peak shaving system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305917A (en) * | 2020-03-20 | 2020-06-19 | 西安西热节能技术有限公司 | Steam heat supplementing air energy storage peak shaving system and method |
| CN113756893A (en) * | 2021-08-27 | 2021-12-07 | 北京工业大学 | Multi-unit combined operation flexibility adjusting system among multiple power plants |
| CN114991889A (en) * | 2022-05-16 | 2022-09-02 | 中国能源建设集团广东省电力设计研究院有限公司 | Compressed air energy storage system, method, equipment and medium based on compression heat |
-
2020
- 2020-03-20 CN CN202020364113.0U patent/CN212054838U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305917A (en) * | 2020-03-20 | 2020-06-19 | 西安西热节能技术有限公司 | Steam heat supplementing air energy storage peak shaving system and method |
| CN113756893A (en) * | 2021-08-27 | 2021-12-07 | 北京工业大学 | Multi-unit combined operation flexibility adjusting system among multiple power plants |
| CN114991889A (en) * | 2022-05-16 | 2022-09-02 | 中国能源建设集团广东省电力设计研究院有限公司 | Compressed air energy storage system, method, equipment and medium based on compression heat |
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