CN214741512U - High-pressure air energy storage power generation system coupled with coal electric heat source - Google Patents
High-pressure air energy storage power generation system coupled with coal electric heat source Download PDFInfo
- Publication number
- CN214741512U CN214741512U CN202120553827.0U CN202120553827U CN214741512U CN 214741512 U CN214741512 U CN 214741512U CN 202120553827 U CN202120553827 U CN 202120553827U CN 214741512 U CN214741512 U CN 214741512U
- Authority
- CN
- China
- Prior art keywords
- coal
- steam
- pressure
- low
- energy storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model discloses a high-pressure air energy storage power generation system coupled with a coal-electricity heat source, which comprises a coal-electricity unit, a steam turbine cold end system and an energy storage power generation system, wherein the steam turbine cold end system comprises a circulating water pump and a cooling tower, and the high-pressure air energy storage power generation system enters the cooling tower after absorbing the heat of the steam discharged by a steam turbine low-pressure cylinder; condensed water obtained after steam turbine exhaust enters a small condenser for condensation enters a condenser of the coal electric unit; the inlet cooling water of the small condenser is taken from the outlet of a circulating water pump of the coal electric unit, and the outlet water is converged into an inlet main pipe of a cooling water tower of the coal electric unit. The heat carrier with various heat source grades of a coal-electric unit thermodynamic system is fully utilized, heat released in an air compression energy storage link is used for heating condensed water on the side of a low-pressure heater through a gas-water heat exchanger and a pipeline valve system, and the temperature of air entering an expansion generator is improved by high-temperature feed water in a countercurrent step heating mode; compare in current gaseous state compressed air energy storage system, the utility model discloses cancel the heat-retaining system, reduced system investment and running cost.
Description
Technical Field
The utility model belongs to the technical field of power side energy storage system, specifically be a high-pressure air energy storage power generation system with coal electric heat source coupling.
Background
Carbon neutralization means that enterprises, groups or individuals measure and calculate the total amount of greenhouse gas emission generated directly or indirectly within a certain time, and the emission of carbon dioxide generated by the enterprises, the groups or the individuals is counteracted through the forms of afforestation, energy conservation, emission reduction and the like, so that zero emission of the carbon dioxide is realized. To achieve carbon neutralization, there are generally two methods: one is the removal of greenhouse gases by special means, such as carbon compensation. And secondly, renewable energy is used, and carbon emission is reduced.
At present, the primary energy is of a single structure rich in coal, lean in oil and less in gas, and the proportion of coal in primary energy consumption is still high and reaches 57.7%. The energy structure has the problems of severe energy safety situation, large carbon emission reduction pressure, unreasonable energy consumption structure, prominent ecological environment problem, low energy utilization efficiency and the like. The method is one of important directions of energy transformation, and needs to vigorously develop offshore wind power, safely and efficiently develop nuclear power, actively develop large-scale hydropower in drainage basins and push coal to generate electricity efficiently and flexibly.
The grid connection of new energy such as photovoltaic and wind energy with extremely strong randomness and volatility characteristics has the problem of unstable network resonance different from the traditional power angle oscillation, and is necessary to carry out work in power grid planning and operation.
The large-scale energy storage devices are built on the power supply side, the power grid side and the user side, the operation flexibility and the safety of the power system are improved, and the method is an effective way for solving the problem of high-proportion consumption of new energy. The energy storage technology is divided into physical energy storage and chemical energy storage, wherein the former mainly comprises pumped storage, compressed air and the like, and the latter mainly comprises batteries, hydrogen energy storage and the like. The pumped storage technology is mature, the efficiency is high (75%), but the problems of geographical position limitation and the like exist, and large-scale popularization is difficult; the battery energy storage technology has the advantages of fast response, small volume and short construction period, but has the defects of small capacity, short overall service life, large industrial pollution and the like; the hydrogen energy has high energy density, but the storage and transportation technology is not completely solved, and the energy cost is greatly increased. The compressed air energy storage technology has the characteristics of long service life, small environmental pollution, low operation and maintenance cost and the like, and has large-scale popularization and application potential.
The air energy storage is divided into two categories, namely low-temperature liquid and high-pressure gas according to the state of an air medium. The compressed air energy storage project is applied to the power grid side or the user side, is mostly in a high-pressure gas state, or is stored in waste salt mines, or is stored in a customized steel tank. The high-pressure gas energy storage system is applied to a power grid side or a user side, and the heat is converted in time and space in a compression energy storage link and an expansion energy release link by arranging the heat storage system. The existing compressed air energy storage power generation system has a strong coupling relation between heat release of a compressor and heat absorption of an expander, and the efficient operation of the compressor and the expander is difficult to take into account: for an air expansion generator, the internal efficiency is in direct proportion to the inlet air temperature, and the air compression process is required to provide high-temperature heat; for air compressors, the most efficient would be isothermal compression.
SUMMERY OF THE UTILITY MODEL
The utility model aims to break the strong coupling relation between the compressor that current highly-compressed air energy storage system exists is exothermic and the expander heat absorption, provide a highly-compressed air energy storage power generation system with coal electric heat source coupling. The high-pressure air energy storage power generation system is built near the coal electric set, the compression heat in the energy storage compression process is used for heating condensed water, and steam is extracted by the low-pressure cylinder regenerative system of the displacement steam turbine; a heating heat source for the energy releasing expansion power generation process is provided for water from the outlet of the high-pressure heater; a steam turbine is arranged to drive an air compressor, and a driving steam source is taken from the steam exhaust and the steam inlet of the intermediate pressure cylinder.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a high pressure air energy storage power generation system coupled with a coal electric heat source, comprising:
a coal electric machine set;
the cooling water at the outlet of the cooling water tower enters the condenser after being pressurized by the circulating water pump, and enters the cooling water tower after absorbing the heat of the exhausted steam of the low-pressure cylinder of the steam turbine;
an energy storage power generation system comprising an air compressor; condensed water obtained after steam turbine exhaust enters a small condenser for condensation enters a condenser of the coal electric unit; the inlet cooling water of the small condenser is taken from the outlet of a circulating water pump of the coal electric unit, and the outlet water is converged into an inlet main pipe of a cooling water tower of the coal electric unit.
The utility model discloses further improvement lies in:
the coal electric unit comprises a boiler, new steam at the outlet of the boiler returns to a boiler reheater after being acted by a high-pressure cylinder of the steam turbine and then enters a medium-pressure cylinder and a low-pressure cylinder of the steam turbine after being heated for the second time, the new steam is used for driving a generator to generate power, and exhaust steam of the low-pressure cylinder of the steam turbine enters a condenser for condensation.
Condensed water of the condenser sequentially flows through a condensed water pump, a No. 8 low-pressure heater, a No. 7 low-pressure heater, a No. 6 low-pressure heater and a No. 5 low-pressure heater, and then enters the boiler to absorb heat after passing through a water supply pump group and a high-pressure heater group, so that the circulation of a steam-water thermal system of the coal-electric unit is completed.
The steam turbine steam source is taken from the steam inlet and the steam outlet of the intermediate pressure cylinder of the steam turbine, the steam outlet of the intermediate pressure cylinder is a low-pressure steam source, and the steam inlet of the intermediate pressure cylinder is a high-pressure steam source.
The air compressor is driven by a steam turbine through a gear coupling in a coaxial variable-speed mode.
And a water ring vacuum pump is arranged in the small condenser and used for pumping out non-condensable gas accumulated in the small condenser.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a high-pressure air energy storage power generation system with coal electricity heat source coupling, make full use of this heat carrier that possesses various heat source grades of coal electric set thermodynamic system, through air water heat exchanger and pipeline valve system, the heat release of energy storage link of air compression is used for heating low pressure feed water heater side condensate, improves the air temperature who gets into the expansion generator with the step heating mode of countercurrent flow with high temperature feedwater; and a straight condensing steam turbine is arranged, and the steam turbine is driven by the steam extracted from the middle of the steam turbine to drag an air compressor, so that the power output adjusting capacity of the coal-electric unit is improved. Compare in current isolated gaseous state compressed air energy storage system, the utility model discloses a with the coupling of coal-electric set heat source side, power side, cancelled the heat-retaining system, reduced system investment and running cost, promoted overall efficiency.
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 diagram of an embodiment of the high-pressure air energy storage power generation system coupled with a coal electric heat source.
Wherein: 1-boiler, 2-turbine high pressure cylinder, 3-turbine medium pressure cylinder, 4-turbine low pressure cylinder, 5-generator, 6-condenser, 7-circulating water pump, 8-cooling water tower, 9-condensate pump, No. 10-8 low pressure heater, No. 11-7 low pressure heater, No. 12-6 low pressure heater, No. 13-5 low pressure heater, 14-water feed pump set, 15-high pressure heater set, 16-steam turbine, 17-gear coupling, 18-air compressor, 19-air cooler, 20-high pressure air storage device, 21-air heater, 22-air expansion generator, 23-small condenser, 24-water ring vacuum pump, 25-medium pressure cylinder steam inlet valve set, 26-a low-pressure cylinder steam inlet valve group, 27-a low-pressure cylinder cooling steam bypass valve group and 28-41-valves.
Detailed Description
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 high-pressure air energy storage power generation system with coal electricity heat source coupling, including air compressor 18, air cooler 19, high-pressure air storage device 20, air heater 21 and the expansion generator 22 that communicate in proper order.
A condenser 6, a circulating water pump 7, a No. 8 low-pressure heater 10, a No. 7 low-pressure heater 11, a No. 6 low-pressure heater 12, a No. 5 low-pressure heater 13, a water feed pump group 14 and a high-pressure heater group 15 are sequentially communicated between a steam turbine low-pressure cylinder 4 and a boiler 1 in the coal electric unit.
The new steam at the outlet of the boiler 1 returns to a reheater of the boiler 1 after acting through a high-pressure steam turbine cylinder 2, enters a middle-pressure steam turbine cylinder 3 and a low-pressure steam turbine cylinder 4 after secondary temperature rise, acts to drive a generator 5 to generate power, and the exhaust steam of the low-pressure steam turbine cylinder 4 enters a condenser 6 to be condensed, sequentially flows through a circulating water pump 7, a low-pressure heater 10, a low-pressure heater 11, a low-pressure heater 12 and a low-pressure heater 13, and then enters the boiler 1 to absorb heat after passing through a feed water pump group 14 and a high-pressure heater group 15, so that the steam-water thermodynamic system circulation of the coal-electric power unit is completed.
The cold end system of the steam turbine consists of a circulating water pump 7 and a cooling water tower 8, cooling water at the outlet of the cooling water tower 8 enters a condenser 6 after being pressurized by the circulating water pump 7, and enters the cooling water tower 8 after absorbing the heat of exhausted steam of the low pressure cylinder 4 of the steam turbine.
The air compressor 18 is driven by the steam turbine 16 through the gear coupling 17 in a coaxial variable-speed manner, and the steam source of the steam turbine 16 is taken from the steam inlet and the steam outlet of the intermediate pressure cylinder 3 of the steam turbine, wherein the steam outlet of the intermediate pressure cylinder is a low-pressure steam source, and the steam inlet of the intermediate pressure cylinder is a high-pressure steam source. And the condensed water after the exhaust steam of the steam turbine 16 enters the small condenser 23 for condensation enters the condenser 6 of the coal electric unit. The inlet cooling water of the small condenser 23 is taken from the outlet of the circulating water pump 7 of the coal electric unit, and the outlet water is converged into the inlet main pipe of the cooling water tower 8 of the coal electric unit. A water ring vacuum pump 24 is provided in the microcondenser 23 to pump out noncondensable gases accumulated therein.
The high-pressure air energy storage power generation system and the coal electric machine set are coupled into a whole.
The new steam at the outlet of the boiler 1 in the coal electric unit returns to a reheater in the boiler 1 after being acted by the high-pressure cylinder 2 of the steam turbine, and then sequentially enters the medium-pressure cylinder 3 and the low-pressure cylinder 4 of the steam turbine to act so as to drive the generator 5 to generate power.
The exhausted steam of the low-pressure cylinder 4 of the steam turbine enters a condenser 6 for condensation, flows through a condensate pump 9, a low-pressure heater 10 of No. 8, a low-pressure heater 11 of No. 7, a low-pressure heater 12 of No. 6, a low-pressure heater 13 of No. 5, a water feeding pump group 14 and a high-pressure heater group 15 in sequence, and then enters a boiler 1 for heat absorption.
The cold end system of the steam turbine consists of a circulating water pump 7 and a cooling water tower 8, cooling water at the outlet of the cooling water tower 8 enters a condenser 6 after being pressurized by the circulating water pump 7, and enters the cooling water tower 8 after absorbing the heat of exhausted steam of the low pressure cylinder 4 of the steam turbine.
The utility model discloses the air is compressed to about 12MPa through the compressor to high pressure high temperature state gets into behind the air cooler gives the coal gas generating set condensate with the heat transfer of compression, gets into steel storage device 20 with high pressure normal atmospheric temperature state.
A condensed water branch is arranged between the outlet of the condensed water pump 9 and the air cooler 19, and partial condensed water of the condensed water pump 9 enters the air cooler 19 through the condensed water branch, and is led out to the outlet of the No. 8 low-pressure heater 10, the outlet of the No. 7 low-pressure heater 11, the outlet of the No. 6 low-pressure heater 12 or the outlet of the No. 5 low-pressure heater 13 after heat exchange.
The compressor 18 is driven by a steam turbine 16, a steam source is taken from the steam exhausted by the medium pressure cylinder 3 of the coal-electric steam turbine, the steam turbine 16 is in a condensing type, a cold end system is taken from the outlet of the coal-electric circulating water pump 7, and return water is converged to the coal-electric cooling water tower 8. The steam turbine 16 selects the model according to the exhaust steam pressure, the temperature and the flow of the middle pressure cylinder 3 in the zero output state of the low pressure cylinder under the 30% THA working condition of the coal-electric machine set. In order to improve the power output adjusting capability of the coal electric unit, the steam turbine 16 is synchronously provided with a high-pressure steam source which is taken from a steam turbine intermediate pressure cylinder 3.
The high-pressure normal temperature air at the outlet of the high-pressure air storage device 20 is heated by the air heater 21 and then enters the air expansion generator 22 to do work for power generation, and the exhaust gas is discharged into the atmospheric environment. The heat source is taken from the outlet of the high-pressure heater group 15 for supplying water, and the water returns to the outlet of the condensate pump 9 after heat exchange.
The utility model discloses the compression energy storage process takes place to require the coal-electric set to fall the power operation at the electric wire netting, participates in the degree of depth peak regulation. The coal electric set boiler maintains the minimum stable combustion load operation, the steam turbine low pressure cylinder 4 operates with zero output, the middle pressure cylinder 3 exhausts steam, except that a small part of the steam enters the low pressure cylinder 4 through a cooling steam pipeline to play a cooling role, the rest steam enters the steam turbine 16 to expand and do work, and the air compressor 18 is coaxially driven. The outlet of the air compressor 18 is high-pressure high-temperature air, and the air enters an air cooler 19 to transfer the compressed heat to condensed water of the coal power unit, and then enters a steel storage device 20 in a high-pressure normal-temperature state.
As the compression energy storage process proceeds, the air pressure in the high pressure air storage device 20 is continuously increased, the steam turbine 16-air compressor unit 18 is in variable operation, the inlet air temperature and flow of the air cooler 19 are in a dynamic change state, and the condensate flow entering the air cooler 19 and the outlet temperature are also in a dynamic change state. From the angle of temperature contra-aperture and cascade utilization, the return point of the high-temperature water at the outlet of the air cooler 19 to the coal electric unit is determined according to the size relationship between the water temperature of the cooler and the water temperature at the outlet of each low-pressure heater, and the specific steps are as follows:
the water temperatures at the outlets of No. 8 low-pressure heater outlet 10, No. 7 low-pressure heater outlet 11, No. 6 low-pressure heater 12 and No. 5 low-pressure heater 13 are respectively t8、t7、t6And t5The water temperature at the outlet of the air cooler 19 is t;
if t < t8Or t is8＜t＜t7And t is less than/2, returning water to the outlet of the No. 8 low-pressure heater 10;
if t8＜t＜t7And t >/2, or t7＜t＜t6And t is less than/2, returning water to the outlet of the No. 7 low-pressure heater 11;
if t7＜t＜t6And t >/2, or t6＜t＜t5And t is less than/2, returning water to the outlet of the No. 6 low-pressure heater 12;
and if t is more than or equal to 2, returning water to the outlet of the No. 5 low-pressure heater 13.
The principle of the utility model is as follows:
referring to fig. 1, the utility model provides a high-pressure air energy storage power generation system coupled with a coal electric heat source, the compression heat generated in the compression energy storage link and the heating heat source required in the expansion energy release power generation link are both efficiently coupled with a heat source with the quality grade close to that of a coal electric unit; the steam turbine is arranged to drive the air compressor, so that the load impact of frequent starting and stopping of the high-power high-voltage motor on the auxiliary power system is reduced. Compared with the existing isolated gaseous air energy storage system applied to the power grid side or the user side: 1) a heat storage system is cancelled, instead of a gas-water heat exchanger, a heating heat source required by the compression heat generated by air in the compression energy storage link and the expansion energy release power generation link exchanges heat with a heat source with the quality grade close to that of a coal-electric machine set, the overall efficiency can be effectively improved, and the overall engineering investment cost is reduced; 2) the steam-driven air compressor is arranged to replace an electrically-driven compressor, a certain stage of extracted steam of the coal-electric steam turbine is used as a heat source to do work at the condensing steam turbine to drag the compressor, so that the load impact of frequent starting and stopping of a high-power high-voltage motor on an auxiliary power system is reduced, the manufacturing cost of equipment is reduced, and the safety and reliability are improved.
The utility model discloses a working process:
the operation mode of the compression energy storage process is as follows:
1) the power grid requires the coal-electric set to run by reducing power and participate in deep peak regulation. The coal electric set boiler 1 maintains the minimum stable combustion load operation, and simultaneously the compression energy storage link of the high-pressure air energy storage system is opened: the low-pressure cylinder 4 of the steam turbine operates in a zero-output state, the low-pressure cylinder steam inlet valve group 26 on the middle and low-pressure communicating pipe is closed, the exhausted steam of the middle pressure cylinder 3 enters the low-pressure cylinder 4 through the valve group 27 to perform a cooling function, other steam enters the steam turbine 16 through the valve group 29 to perform expansion work, the exhausted steam enters the small condenser 23, is pressurized by the circulating water pump 7, flows through cooling water of the valve group 31 to be condensed, the condensed water returns to the coal electric unit condenser 6 through the valve group 32, and the cooling water at the outlet of the small condenser 23 is collected to the inlet main pipe of the cooling water tower 8 through the valve group 30. The water ring vacuum pump 24 is put into operation to pump out non-condensable gas gathered in the small condenser 23 so as to ensure the heat exchange effect in the small condenser 23.
2) The steam turbine 16 is coaxially connected with the air compressor 18 through a gear coupling 17, the steam turbine 16 and the air compressor 18 run at variable speeds, air is continuously compressed into a high-pressure state, and the air is cooled by low-temperature condensed water at the outlet of the condensed water pump 9 through the air cooler 19, flows through the valve group 33, is cooled by the low-temperature condensed water and then enters the high-pressure air storage device 20 through the valve group 41.
The air cooler 19 inlet air temperature and flow are in a dynamic state, and the condensate flow into the air cooler 19 and the outlet temperature are also in a dynamic state. From the angle of temperature contra-aperture and gradient utilization, the water return point from the high-temperature water at the outlet of the air cooler 19 to the coal electric unit is determined according to the size relationship between the water temperature of the air cooler 19 and the water temperatures at the outlets of the low-pressure heaters 10-13 at each stage, and the specific steps are as follows:
the water temperatures at the outlets of No. 8 low-pressure heater 10, No. 7 low-pressure heater 11, No. 6 low-pressure heater 12 and No. 5 low-pressure heater 13 are respectively t8、t7、t6And t5The water temperature at the outlet of the air cooler 19 is t;
if t < t8Or t is8＜t＜t7And t is less than/2, returning water to the outlet of the No. 8 low-pressure heater 10;
if t8＜t＜t7And t >/2, or t7＜t＜t6And t is less than/2, returning water to the outlet of the No. 7 low-pressure heater 11;
if t7＜t＜t6And t >/2, or t6＜t＜t5And t is less than/2, returning water to the outlet of the No. 6 low-pressure heater 12;
and if t is more than or equal to 2, returning water to the outlet of the No. 5 low-pressure heater 13.
And determining the opening or closing state of the valve groups 34-37 according to the water return position.
3) If the electric output of the coal electric generator set still does not meet the peak load regulation requirement of the power grid in the low-pressure cylinder zero-output operation mode, the valve group 28 is gradually opened, meanwhile, the steam inlet valve group 25 of the medium-pressure cylinder is closed to a small opening degree to lift the hot reheat steam pressure, and part of the hot reheat steam is mixed with the exhaust steam of the medium-pressure cylinder 3 and then enters the steam turbine 16 to do work. The opening degree of the valve groups 25 and 28 is dynamically adjusted according to the difference value between the electric output of the coal electric machine set and the requirement of the power grid.
4) The valve groups 38, 39 and 40 are closed and the expansion energy-releasing power generation process consisting of the air heater 21, the air expansion power generator 22 and the like is not operated.
The operation mode of the expansion energy release process is as follows:
the valve groups 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 41 are closed, the valve groups 25, 26 are fully open, and the valve groups 38, 39, 40 are open.
The high-pressure normal temperature air at the outlet of the high-pressure air storage device 20 enters the air heater 21 through the valve group 40, and then enters the air expansion generator 22 to do work, and the exhaust air enters the atmospheric environment.
Part of high-temperature feed water at the outlet of the high-pressure heater group 15 enters the air heater 21 in a countercurrent mode, exchanges heat with air and then enters the outlet of the condensate pump 9 through the valve group 39.
The utility model provides a high-pressure air energy storage power generation system with coal-electric machine group heat source coupling, make full use of this heat carrier that possesses various heat source grades of coal-electric machine group thermodynamic system, through air water heat exchanger and pipeline valve system, the heat release of energy storage link of air compression is used for heating low condensation water that adds, improves the air temperature who gets into the expansion generator with the step heating mode of countercurrent flow with high temperature feedwater; and a straight condensing steam turbine is arranged, and the steam turbine is driven by the steam extracted from the middle of the steam turbine to drag an air compressor, so that the power output adjusting capacity of the coal-electric unit is improved. Compare in current gaseous state compressed air energy storage system, the utility model discloses cancel the heat-retaining system, reduced system investment and running cost, promoted overall efficiency.
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 (6)
1. A high-pressure air energy storage power generation system coupled with a coal-electric heat source, comprising:
a coal electric machine set;
the system comprises a turbine cold end system, wherein the turbine cold end system comprises a circulating water pump (7) and a cooling water tower (8), cooling water at an outlet of the cooling water tower (8) enters a condenser (6) after being pressurized by the circulating water pump (7), and enters the cooling water tower (8) after absorbing the heat of steam exhausted by a turbine low-pressure cylinder (4);
an energy storage and power generation system including an air compressor (18); condensed water after exhaust steam of the steam turbine (16) enters a small condenser (23) for condensation enters a condenser (6) of the coal electric unit; the cooling water at the inlet of the small condenser (23) is taken from the outlet of a circulating water pump (7) of the coal electric unit, and the outlet water is converged into an inlet main pipe of a cooling water tower (8) of the coal electric unit.
2. The high-pressure air energy storage power generation system coupled with the coal-electric heat source as claimed in claim 1, wherein the coal-electric unit comprises a boiler (1), new steam at an outlet of the boiler (1) does work through a turbine high-pressure cylinder (2), returns to a reheater of the boiler (1) and is subjected to secondary temperature rise, then enters a turbine intermediate-pressure cylinder (3) and a turbine low-pressure cylinder (4) to do work to drive a generator (5) to generate power, and exhaust steam of the turbine low-pressure cylinder (4) enters a condenser (6) to be condensed.
3. The high-pressure air energy-storage power generation system coupled with the coal-electric heat source according to claim 2, wherein condensed water of the condenser (6) sequentially flows through a circulating water pump (7), a No. 8 low-pressure heater (10), a No. 7 low-pressure heater (11), a No. 6 low-pressure heater (12) and a No. 5 low-pressure heater (13), and then enters the boiler (1) to absorb heat after passing through a water feed pump set (14) and a high-pressure heater group (15), so that steam-water thermodynamic system circulation of the coal-electric unit is completed.
4. The high-pressure air energy-storage power generation system coupled with the coal-electric heat source is characterized in that the steam turbine (16) is used for taking steam inlet and steam outlet of an intermediate pressure cylinder (3) of the steam turbine, the steam outlet of the intermediate pressure cylinder is used for taking low-pressure steam source, and the steam inlet of the intermediate pressure cylinder is used for taking high-pressure steam source.
5. The high-pressure air energy-storage and power-generation system coupled with the coal-electric heat source as claimed in claim 1, wherein the air compressor (18) is driven by a steam turbine (16) through a gear coupling (17) in a coaxial variable-speed mode.
6. The high-pressure air energy-storage power generation system coupled with the coal-electric heat source as claimed in claim 1, wherein a water ring vacuum pump (24) is arranged in the small condenser (23) and used for pumping out non-condensable gas accumulated in the small condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120553827.0U CN214741512U (en) | 2021-03-17 | 2021-03-17 | High-pressure air energy storage power generation system coupled with coal electric heat source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120553827.0U CN214741512U (en) | 2021-03-17 | 2021-03-17 | High-pressure air energy storage power generation system coupled with coal electric heat source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214741512U true CN214741512U (en) | 2021-11-16 |
Family
ID=78594829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120553827.0U Active CN214741512U (en) | 2021-03-17 | 2021-03-17 | High-pressure air energy storage power generation system coupled with coal electric heat source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214741512U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412585A (en) * | 2022-03-11 | 2022-04-29 | 西安热工研究院有限公司 | Steam-carbon dioxide coupled power generation system |
| CN114592929A (en) * | 2022-03-04 | 2022-06-07 | 西安热工研究院有限公司 | Stepped heat storage system and method for deep peak shaving of coal-electric unit |
| CN114776394A (en) * | 2022-05-25 | 2022-07-22 | 西安热工研究院有限公司 | Double-circulation steam turbine power generation system |
| CN114776393A (en) * | 2022-04-15 | 2022-07-22 | 上海发电设备成套设计研究院有限责任公司 | Air energy storage power generation system and method coupled with thermal power |
-
2021
- 2021-03-17 CN CN202120553827.0U patent/CN214741512U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592929A (en) * | 2022-03-04 | 2022-06-07 | 西安热工研究院有限公司 | Stepped heat storage system and method for deep peak shaving of coal-electric unit |
| CN114592929B (en) * | 2022-03-04 | 2023-09-29 | 西安热工研究院有限公司 | Gradient heat storage system and method for coal motor group depth peak shaving |
| CN114412585A (en) * | 2022-03-11 | 2022-04-29 | 西安热工研究院有限公司 | Steam-carbon dioxide coupled power generation system |
| CN114776393A (en) * | 2022-04-15 | 2022-07-22 | 上海发电设备成套设计研究院有限责任公司 | Air energy storage power generation system and method coupled with thermal power |
| CN114776394A (en) * | 2022-05-25 | 2022-07-22 | 西安热工研究院有限公司 | Double-circulation steam turbine power generation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214741512U (en) | High-pressure air energy storage power generation system coupled with coal electric heat source | |
| CN214741518U (en) | Supercritical carbon dioxide energy storage power generation system coupled with coal electric machine set | |
| CN102758748A (en) | High-pressure liquid air energy storage/release system | |
| CN213810561U (en) | Thermal power generating unit peak regulation frequency modulation system based on liquid compressed air energy storage | |
| CN214741517U (en) | Liquid carbon dioxide energy storage power generation system coupled with coal electric machine set | |
| CN111305918A (en) | Steam-driven air energy storage and peak regulation system and method without cold source loss | |
| CN110454764A (en) | A kind of the thermoelectricity decoupled system and operation method of cogeneration units | |
| CN111121389A (en) | Liquefied air energy storage and power generation system of deep coupling coal-fired unit | |
| CN105443170A (en) | High-and-low-temperature supercritical carbon dioxide waste heat utilization system | |
| CN109854316B (en) | Combined cycle heat supply and power peak regulation coupling system based on energy cascade utilization and operation method thereof | |
| CN111121390A (en) | Liquefied air energy storage power generation system coupled with steam-water system of coal-fired power generating unit | |
| CN113982891B (en) | Compressed air composite energy storage system for old thermal power plant boiler transformation and operation method thereof | |
| CN211900716U (en) | Steam-driven air energy storage peak regulation system without cold source loss | |
| CN208073574U (en) | A kind of three regenerator supercritical carbon dioxide cycle generating system of three turbine | |
| CN213807777U (en) | Coupling system of thermal power generation system and compressed air energy storage system | |
| CN211903494U (en) | Liquefied air energy storage power generation system coupled with steam-water system of coal-fired power generating unit | |
| CN210118178U (en) | Combined power generation system based on waste incineration waste heat and photo-thermal | |
| CN210088955U (en) | Combined cycle device for steam extraction integration and heat storage peak regulation coupling | |
| CN114776411B (en) | Integrated heat storage coal-fired power generation system and working method | |
| CN113051752B (en) | Method for determining optimal heat source of high-pressure air energy storage system electrically coupled with coal | |
| CN215057597U (en) | Comprehensive energy supply system for coupling coal electric unit with compressed air for energy storage | |
| CN206360740U (en) | Afterheat generating system and power station | |
| CN101788141A (en) | Absorption type heat regenerator and application thereof in regenerative circulation system of power plant | |
| CN214147968U (en) | Heating system for realizing cascade temperature rise of liquid compressed air energy storage power generation system | |
| CN212339737U (en) | Liquefied air energy storage and power generation system of deep coupling coal-fired unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |