CN212406821U - Steam-drive liquid compressed air energy storage peak shaving system based on low-pressure cylinder zero-output technology - Google Patents
Steam-drive liquid compressed air energy storage peak shaving system based on low-pressure cylinder zero-output technology Download PDFInfo
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- CN212406821U CN212406821U CN202022215334.4U CN202022215334U CN212406821U CN 212406821 U CN212406821 U CN 212406821U CN 202022215334 U CN202022215334 U CN 202022215334U CN 212406821 U CN212406821 U CN 212406821U
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Abstract
The utility model discloses a liquid compressed air energy storage peak shaving system of vapour drive based on zero technique of exerting oneself of low pressure jar realizes the operation of unit peak shaving through the zero coupling of exerting oneself of system and liquid compressed air energy storage system of low pressure jar. The steam turbine is driven by the steam of the unit to drive the air compressor of the energy storage system to operate, and the transmission of steam energy between the thermal power generating unit and the liquid compressed air energy storage system is realized, so that the power output adjusting capacity of the unit is improved, and the peak regulation requirement of a power grid is met. The utility model provides high whole system operation efficiency. When the power grid dispatching load is reduced, the steam flow at the outlet of the intermediate pressure cylinder is changed, and the steam driving turbine is adopted to drive the air compressor of the liquid compressed air energy storage system to rotate to complete the energy storage process, so that the reasonable consumption of the steam energy is realized. Thereby reducing the work share of the low-pressure cylinder and reducing the power generation output of the unit. When the power grid dispatching load is increased, the liquid compressed air energy storage system releases energy to generate electricity, and the power supply load requirement is met.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of heat energy comprehensive utilization, a vapour is driven liquid compressed air energy storage peak shaving system based on zero technique of exerting oneself of low pressure jar is related to.
[ background of the invention ]
In recent years, power generation using renewable energy resources such as wind energy and solar energy has been rapidly developed in response to the gradual depletion of fossil fuels and environmental problems caused by the depletion. The renewable energy power generation large-scale grid connection with volatility and randomness further improves the peak regulation requirement of the traditional thermal power generating unit.
At present, the technology for improving the electric output regulation capability of the thermal power generating unit mainly comprises an electric boiler heat storage technology, a water tank heat storage technology, a low-pressure cylinder zero-output technology, an electrochemical energy storage technology and the like. The low-pressure cylinder zero-output technology has the advantages of small investment, flexible operation mode and the like, and is widely applied to flexible modification of thermal power generating units in recent years. However, the low-pressure cylinder zero-output technology needs a large amount of by-pass steam, so that the low-pressure cylinder zero-output technology is only suitable for a cogeneration unit and cannot be applied to the flexibility modification of a straight condensing unit.
[ Utility model ] content
An object of the utility model is to solve the problem among the prior art, provide a liquid compressed air energy storage peak shaving system of vapour drive based on zero technique of exerting oneself of low pressure jar, the utility model discloses a zero bypass steam drive steam turbine that system of exerting oneself of low pressure jar drives compressed air energy storage system air compressor operation, realizes utilizing the reasonable absorption of steam energy. Thereby reducing the work share of the low-pressure cylinder and realizing the peak shaving operation of the unit.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
steam-drive liquid compressed air energy storage peak regulation system based on low-pressure cylinder zero-output technology comprises:
the high-pressure cylinder, the intermediate-pressure cylinder and the low-pressure cylinder drive the first generator to generate electricity;
the liquid compressed air energy storage system comprises a steam turbine and at least one stage of air compressor, wherein a steam source of the steam turbine is exhausted from a medium pressure cylinder of the coal-fired generator set; the steam turbine drives an air compressor, the outlet of the air compressor is connected with a refrigeration expander, the outlet of the refrigeration expander is connected with a gas-liquid separation device, the gas outlet of the gas-liquid separation device is connected with the inlet of the air compressor, and the liquid outlet is connected with an air storage tank; the outlet of the air storage tank is connected with a booster pump, and the outlet of the booster pump is connected with at least one stage of air expander through at least one stage of air heater; the air expander drives a second generator to generate electricity.
The utility model discloses further improvement lies in:
the number of the air heaters and the number of the air expanders are the same.
The coal-fired power generator set comprises a high-pressure cylinder, wherein a steam outlet of the high-pressure cylinder is connected with a steam inlet of a medium-pressure cylinder, the steam outlet of the medium-pressure cylinder is divided into two paths, the first path is connected with the steam inlet of a low-pressure cylinder, and the second path is connected with the steam inlet of a steam turbine; the steam exhaust port of the low pressure cylinder is connected with a condenser, and the outlet of the condenser is connected with a unit condensate system.
The intermediate pressure cylinder is connected with the low pressure cylinder through the regulating valve and is connected with the steam turbine through the first valve.
The steam turbine is connected with the exhaust steam cooler through a second valve, and an outlet of the exhaust steam cooler is connected with the condenser.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a zero coupling of system and liquid compressed air energy storage system that exert oneself of low-pressure cylinder promotes unit electricity output controllability, realizes the operation of unit peak regulation. The steam turbine is driven by the steam of the unit to drive the air compressor of the energy storage system to operate, and the transmission of steam energy between the thermal power generating unit and the liquid compressed air energy storage system is realized, so that the power output adjusting capacity of the unit is improved, and the peak regulation requirement of a power grid is met. Compared with the conventional liquid compressed air energy storage system, the configuration of an air compressor driving motor is cancelled. The operation energy efficiency of the whole system is improved. When the power grid dispatching load is reduced, the steam flow at the outlet of the intermediate pressure cylinder is changed, the steam of the unit is adopted to drive the steam turbine to drive the air compressor of the liquid compressed air energy storage system to rotate to complete the energy storage process, and the reasonable consumption of the steam energy is realized. Thereby reducing the work share of the low-pressure cylinder and reducing the power generation output of the unit. When the power grid dispatching load is increased, the liquid compressed air energy storage system releases energy and discharges electricity to meet the power supply load requirement.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of the thermodynamic system of the present invention.
Wherein: 1-a high pressure cylinder; 2-intermediate pressure cylinder; 3-low pressure cylinder; 4-a first generator; 5-a condenser; 6-adjusting the valve; 7-a first valve; 8-a second valve; 9-a dead steam cooler; 10-a steam turbine; 11-an air compressor; 12-a refrigeration expander; 13-a gas-liquid separation device; 14-an air reservoir; 15-a booster pump; 16-an air heater; 17-an air expander; 18-second generator.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship that the product of the present invention is usually placed when in use, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the utility model discloses liquid compressed air energy storage peak shaving system is driven to vapour based on zero technique of exerting oneself of low pressure jar, including coal-fired generating set and liquid compressed air energy storage system.
The exhaust steam of a medium pressure cylinder 2 of the coal-fired power generating set is connected with a liquid compressed air energy storage system, and a high pressure cylinder 1, the medium pressure cylinder 2 and a low pressure cylinder 3 drive a first power generator 4 to generate power; the coal-fired generating set comprises a high-pressure cylinder 1, wherein a steam outlet of the high-pressure cylinder 1 is connected with a steam inlet of a middle-pressure cylinder 2, the steam outlet of the middle-pressure cylinder 2 is divided into two paths, the first path is connected with a steam inlet of a low-pressure cylinder 3, and the second path is connected with a steam inlet of a steam turbine 10; the steam exhaust port of the low pressure cylinder 3 is connected with a condenser 5, and the outlet of the condenser 5 is connected with a unit condensate system. The intermediate pressure cylinder 2 is connected to the low pressure cylinder 3 via a control valve 6 and to a steam turbine 10 via a first valve 7. The steam turbine 10 is connected with a dead steam cooler 9 through a second valve 8, and the outlet of the dead steam cooler 9 is connected with the condenser 5.
The liquid compressed air energy storage system comprises a steam turbine 10 and at least one stage of air compressor 11, wherein a steam source of the steam turbine 10 is exhausted from a middle pressure cylinder 2 of the coal-fired power generating set; the steam turbine 10 drives an air compressor 11, and a compressed air outlet of the air compressor 11 is connected with a refrigeration expander 12; the outlet of the refrigeration expansion machine 12 is connected with a gas-liquid separation device 13, the gas outlet of the gas-liquid separation device 13 is connected with the inlet of the air compressor 11, and the liquid outlet is connected with an air storage tank 14; an outlet of the air storage tank 14 is connected with a booster pump 15, and an outlet of the booster pump 15 is connected with at least one stage of air expansion machine 17 through at least one stage of heater 16; the air expander 17 drives a second generator 18 to generate electricity.
The utility model discloses a theory of operation:
when the unit operates in a normal mode, the regulating valve 6 is opened, and the first valve 7 and the second valve 8 are closed. Steam at the outlet of the intermediate pressure cylinder 2 completely enters the low pressure cylinder 3 to do work, and drives the first generator 4 to generate electricity. And the exhaust steam of the low-pressure cylinder 3 enters a condenser 5 for condensation and then returns to a unit condensed water system.
And when the dispatching load of the power grid is reduced and the unit needs to participate in peak shaving, the low-pressure cylinder zero-output mode is switched to operate. At the moment, the first valve 7 and the second valve 8 are opened, the steam at the outlet of the intermediate pressure cylinder 2 is divided into two paths, and one path of steam enters the steam turbine 10 through the first valve 7 to do work and drives the air compressor 11 to operate. The other path of steam enters the low-pressure cylinder 3, and the steam inlet flow of the low-pressure cylinder 3 is reduced by adjusting the opening of the regulating valve 6, so that the low-pressure cylinder only meets the cooling requirement of the low-pressure tail end. Thereby reducing the work share of the low-pressure cylinder 3 and reducing the generating output of the unit.
Most of steam at the outlet of the intermediate pressure cylinder 2 enters a steam turbine 10 to drive an air compressor 11 to operate, and exhausted steam of the steam turbine 10 enters an exhaust steam cooler 9 to be condensed and then returns to a unit condenser 5. The high-pressure air at the outlet of the air compressor 11 enters a refrigeration expander 12 to be expanded and cooled, and then enters a gas-liquid separation device 13. Liquid air is stored in an air storage tank 14 and separated gaseous air is returned to the inlet of the air compressor 11. And finishing the energy storage process of the liquid compressed air energy storage system.
When the liquid compressed air energy storage system releases energy, liquid air at the outlet of the air storage tank 14 is pressurized by the booster pump 15, enters the air heater 16 for heating, and then enters the air expander 17 for doing work to drive the second generator 18 to generate power. And finishing the energy releasing and power generating process of the liquid compressed air energy storage system.
The air compressor 11 may be one or more stages.
The air heater 16 and the air expander 17 may be one or more stages, and the number of the air heater 16 and the number of the air expander 17 correspond to each other.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. Liquid compressed air energy storage peak shaving system of vapour drive based on technique of exerting oneself of low pressure jar, its characterized in that includes:
the high-pressure cylinder, the intermediate-pressure cylinder and the low-pressure cylinder drive the first generator to generate electricity;
the liquid compressed air energy storage system comprises a steam turbine and at least one stage of air compressor, wherein a steam source of the steam turbine is exhausted from a medium pressure cylinder of the coal-fired generator set; the steam turbine drives an air compressor, the outlet of the air compressor is connected with a refrigeration expander, the outlet of the refrigeration expander is connected with a gas-liquid separation device, the gas outlet of the gas-liquid separation device is connected with the inlet of the air compressor, and the liquid outlet is connected with an air storage tank; the outlet of the air storage tank is connected with a booster pump, and the outlet of the booster pump is connected with at least one stage of air expander through at least one stage of air heater; the air expander drives a second generator to generate electricity.
2. The low cylinder zero force technology based steam drive liquid compressed air energy storage peaking system of claim 1, wherein the number of air heaters and air expanders is the same.
3. The steam-driven liquid compressed air energy storage and peak shaving system based on the low pressure cylinder zero output technology as claimed in claim 1, wherein the coal-fired power generating set comprises a high pressure cylinder, a steam outlet of the high pressure cylinder is connected with a steam inlet of an intermediate pressure cylinder, the steam outlet of the intermediate pressure cylinder is divided into two paths, the first path is connected with the steam inlet of the low pressure cylinder, and the second path is connected with the steam inlet of a steam turbine; the steam exhaust port of the low pressure cylinder is connected with a condenser, and the outlet of the condenser is connected with a unit condensate system.
4. The system according to claim 2 or 3, wherein the intermediate pressure cylinder is connected to the low pressure cylinder through a regulating valve and to the steam turbine through a first valve.
5. The low pressure cylinder zero output technology based steam drive liquid compressed air energy storage peak shaving system according to claim 2, wherein the steam turbine is connected with a steam exhaust cooler through a second valve, and an outlet of the steam exhaust cooler is connected with a condenser.
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| CN202022215334.4U CN212406821U (en) | 2020-09-29 | 2020-09-29 | Steam-drive liquid compressed air energy storage peak shaving system based on low-pressure cylinder zero-output technology |
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| CN202022215334.4U CN212406821U (en) | 2020-09-29 | 2020-09-29 | Steam-drive liquid compressed air energy storage peak shaving system based on low-pressure cylinder zero-output technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565590A (en) * | 2021-06-18 | 2021-10-29 | 东方电气集团东方汽轮机有限公司 | Compressed air energy storage and coal-fired unit coupled wide-load deep peak shaving power generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565590A (en) * | 2021-06-18 | 2021-10-29 | 东方电气集团东方汽轮机有限公司 | Compressed air energy storage and coal-fired unit coupled wide-load deep peak shaving power generation system |
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