CN113864002A - Steam and electricity double-drive compressed air preparation system based on cogeneration unit - Google Patents
Steam and electricity double-drive compressed air preparation system based on cogeneration unit Download PDFInfo
- Publication number
- CN113864002A CN113864002A CN202111212097.9A CN202111212097A CN113864002A CN 113864002 A CN113864002 A CN 113864002A CN 202111212097 A CN202111212097 A CN 202111212097A CN 113864002 A CN113864002 A CN 113864002A
- Authority
- CN
- China
- Prior art keywords
- steam
- pressure
- enters
- low
- heater
- 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.)
- Pending
Links
- 230000005611 electricity Effects 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000010438 heat treatment Methods 0.000 claims abstract description 44
- 238000000605 extraction Methods 0.000 claims description 17
- 238000010248 power generation Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/04—Using steam or condensate extracted or exhausted from steam engine plant for specific purposes other than heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D1/00—Steam central heating systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Water Supply & Treatment (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a steam and electricity double-drive compressed air preparation system based on a cogeneration unit, wherein steam of a boiler enters a high-pressure cylinder to do work and then returns to the boiler to be heated, and reheated steam of the boiler enters an intermediate-pressure cylinder to do work; the steam at the outlet of the intermediate pressure cylinder is divided into three paths, wherein one path of the steam enters the backpressure steam turbine, the other path of the steam enters the high-pressure heating network heater, and the other path of the steam enters the low pressure cylinder; the exhaust steam of the backpressure steam turbine enters a low-pressure heat supply network heater to generate condensed water; steam of the high-pressure heating network heater generates condensed water; condensed water of a high-pressure heating network heater of the low-pressure heating network heater enters a condenser together; the exhaust steam of the low-pressure cylinder enters a condenser to generate condensed water, and three paths of condensed water in the condenser are converged, heated by a high-pressure and low-pressure heater group and then enter a boiler to realize thermodynamic cycle; the back pressure steam turbine drives the motor and the air compressor to operate through steam driving, and the electric quantity generated by the motor is transmitted to an auxiliary power system. The invention applies work by utilizing the excess pressure of the heating steam, realizes the cascade utilization of the steam and improves the running economy of the unit.
Description
Technical Field
The invention belongs to the technical field of cogeneration and energy conservation, and relates to a steam-electricity double-drive compressed air preparation system based on a cogeneration unit.
Background
As a user with large energy consumption, energy conservation of a thermal power plant is always the key point of industrial energy conservation, and with the continuous rising of the price of fossil fuel, energy conservation and emission reduction are also important means for saving the operation cost of the power plant and improving the economic benefit. The combination of power production and industrial steam supply improves the energy utilization efficiency, and is an effective measure for saving energy, reducing carbon emission and protecting the environment.
In addition to coal, water resources and the like, compressed air is also one of main raw materials consumed in the production process of the thermal power generating unit. In a thermal power plant, a large number of instruments and equipment can normally operate only by being driven by high-pressure compressed air, so that the thermal power plant is generally provided with a compressed air station for continuously preparing compressed air. The conventional air compressor is driven by a motor, and a power supply is taken from a station service power system. Because the amount of compressed air in the whole plant is huge, the power consumption load of the air compressor is high, a large amount of precious electric energy needs to be consumed, and the influence on the service power is large. A large amount of electric energy is used for driving the air compressor to produce compressed air, so that the on-line electric quantity is reduced and the electricity selling income of a power plant is also reduced on the premise of keeping the generating load of the unit unchanged. Because the power plant needs constantly to reform transform at the operation in-process, increases gas appliances, and compressed air consumption also constantly increases, leads to the air compressor machine to consume the electric energy also constantly to increase, and the adverse effect to the whole factory electricity utilization also constantly strengthens to influence the economic benefits of whole factory.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a steam-electricity double-drive compressed air preparation system based on a cogeneration unit. The back pressure turbine steam source comes from the unit heating steam extraction, and in hot season, the back pressure turbine drags the motor and the air compressor machine simultaneously to operate, and the back pressure turbine undertakes the power consumption of the original motor to reduce the power consumption of the air compressor machine system. When the output of the back pressure turbine meets the requirement of the air compressor and the surplus exists, the motor automatically becomes in a power generation state, the surplus power output by the back pressure turbine is converted into electric energy, and the electric energy is supplied to a power system of a plant. When the output of the back pressure turbine is not enough to meet the working requirement of the air compressor, the back pressure turbine and the motor jointly drag the air compressor to work, the motor is changed into a power consumption state, power is taken from a station service power system, and the power consumption of the residual air compressor is shared, so that the power consumption of the air compressor system is reduced. In non-heating seasons, the back pressure turbine is disconnected and quits running, and the motor drives the air compressor to run completely, which is the same as the running scheme of the original system. The scheme can realize the cascade utilization of the residual pressure of heating steam in the heat supply period, reduce the plant power consumption rate, increase the online electric quantity and improve the heat supply operation economy of the cogeneration unit in winter.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a vapour, electricity double-drive compressed air prepares system based on combined heat and power units includes: the system comprises a boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a back pressure turbine, a high-pressure heating network heater, a low-pressure heating network heater, a condenser, a motor, a high-pressure and low-pressure heater group, an air compressor and a service power system;
the steam of the boiler enters the high-pressure cylinder to do work and then returns to the boiler to be heated, and the reheated steam of the boiler enters the intermediate pressure cylinder to do work; the steam at the outlet of the intermediate pressure cylinder is divided into three paths, wherein one path of the steam enters the backpressure steam turbine, the other path of the steam enters the high-pressure heating network heater, and the other path of the steam enters the low pressure cylinder;
the exhaust steam of the backpressure steam turbine enters a low-pressure heat supply network heater to generate condensed water; steam of the high-pressure heating network heater generates condensed water; condensed water of the low-pressure heating network heater and the condensed water of the high-pressure heating network heater enter the condenser together; the exhaust steam of the low-pressure cylinder enters a condenser to generate condensed water, and three paths of condensed water in the condenser are converged, heated by a high-pressure and low-pressure heater group and then enter a boiler to realize thermodynamic cycle; the back pressure steam turbine drives the motor and the air compressor to operate through steam driving, and the electric quantity generated by the motor is transmitted to an auxiliary power system.
The invention is further improved in that:
when the output of the back pressure turbine cannot meet the requirement for driving the air compressor, the service power system supplies power to the motor, and the motor and the back pressure turbine drive the air compressor to operate together.
The high-low pressure heater group comprises a low pressure heater and a high pressure heater; a deaerator and a water feeding pump are connected between the low-pressure heater and the high-pressure heater; the outlet of the low-pressure heater is connected with the inlet of a deaerator, the outlet of the deaerator is connected with the inlet of a water feeding pump, the outlet of the water feeding pump is connected with the inlet of a high-pressure heater, and the outlet of the high-pressure heater is connected with the inlet of a boiler.
A condensate pump is connected between the condenser and the low-pressure heater.
Steam at one outlet of the intermediate pressure cylinder enters the low pressure cylinder through a heat supply butterfly valve; steam at one path of outlet of the intermediate pressure cylinder enters the backpressure steam turbine through the steam extraction valve group and the first valve; and the steam at one outlet of the intermediate pressure cylinder enters the high-pressure heating network heater through the steam extraction valve group.
And the steam at the outlet of the backpressure steam turbine enters the low-pressure heat supply network heater through a second valve.
The back pressure turbine and the motor are connected with a gear box, a coupler and an overrunning clutch; the output shaft end of the back pressure steam turbine is connected with the gear box, the output shaft end of the gear box is connected with the coupler, the output shaft end of the coupler is connected with the overrunning clutch, and the output shaft end of the overrunning clutch is connected with the motor.
The back pressure turbine, the gear box, the coupler and the overrunning clutch are coaxially connected with the motor.
Compared with the prior art, the invention has the following beneficial effects:
the invention has smaller modification range, can realize the steam-electric dual drive of the air compressor by adding the backpressure steam turbine, the motor, the overrunning clutch and a small amount of pipeline valves, has simple system and low modification cost.
The invention has the same operation mode as the original operation mode in non-heat supply seasons, and can not increase the operation difficulty.
The invention utilizes the residual pressure power of the heating steam to realize the steam gradient utilization and improve the energy utilization efficiency.
When the motor is in a power generation state, the generated energy can be supplied to a station service system, the station service power rate is reduced, the online electric quantity is increased, and the running economy of the unit is improved.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present invention, the drawings needed 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 system diagram of an embodiment of a winter steam and electricity double-drive compressed air preparation system for a power cogeneration unit.
Wherein: 1-a boiler; 2-high pressure cylinder; 3-a medium pressure cylinder; 4-low pressure cylinder; 5-a high pressure heater; 6-a deaerator; 7-a feed pump; 8-a low pressure heater; 9-a condensate pump; 10-a condenser; 11-heat supply butterfly valve; 12-a steam extraction valve group; 13-a first valve; 14-a back pressure turbine; 15-a gearbox; 16-an overrunning clutch; 17-an electric motor; 18-an air compressor; 19-a second valve; 20-a plant power system; 21-high pressure heating network heater; 22-low pressure heating network heater; 23-coupling.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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 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 figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the present invention is used, the description is merely for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood 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 otherwise explicitly stated or limited, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, fig. 1 discloses a steam-electricity double-drive compressed air preparation system based on a cogeneration unit, which comprises a boiler 1, a high-pressure cylinder 2, an intermediate pressure cylinder 3, a low-pressure cylinder 4, a back pressure turbine 14, a low-pressure heat supply network heater 22, a high-pressure heat supply network heater 21, a condenser 10, a motor 17, a high-low pressure heater group, an air compressor 18 and an auxiliary power system 20;
the steam of the boiler 1 enters the high pressure cylinder 2 to do work and then returns to the boiler 1 to be heated, and the reheated steam of the boiler 1 enters the intermediate pressure cylinder 3 to do work; the steam at the outlet of the intermediate pressure cylinder 3 is divided into three paths, one path enters the backpressure steam turbine 14, the other path enters the high-pressure heating network heater 21, and the other path enters the low pressure cylinder 4;
the exhaust steam of the backpressure steam turbine 14 enters a low-pressure heating network heater 22 to generate condensed water; the steam of the high-pressure heating network heater 21 generates condensed water; condensed water of the low-pressure heating network heater 22 and the high-pressure heating network heater 21 enter the condenser 10 together; the exhaust steam of the low pressure cylinder 4 enters a condenser 10 to generate condensed water, and three paths of condensed water in the condenser 10 are converged, heated by a high-pressure and low-pressure heater group and then enter a boiler 1 to realize thermodynamic cycle;
the back pressure turbine 14 drives the motor 17 and the air compressor 18 to operate through steam driving, and the power generated by the motor 17 is transmitted to the service power system 20.
When the output of the back pressure turbine 14 cannot meet the requirement of driving the air compressor 18, the service power system 20 supplies power to the motor 17, and the motor 17 and the back pressure turbine 14 drive the air compressor 18 to operate together. The high-low pressure heater group comprises a low pressure heater 8 and a high pressure heater 5; a deaerator 6 and a water feeding pump 7 are connected between the low-pressure heater 8 and the high-pressure heater 5; the outlet of the low-pressure heater 8 is connected with the inlet of a deaerator 6, the outlet of the deaerator 6 is connected with the inlet of a water feeding pump 7, the outlet of the water feeding pump 7 is connected with the inlet of a high-pressure heater 5, and the outlet of the high-pressure heater 5 is connected with the inlet of a boiler 1; a condensate pump 9 is connected between the condenser 10 and the low-pressure heater 8. Steam at one path of outlet of the intermediate pressure cylinder 3 enters the low pressure cylinder 4 through a heat supply butterfly valve 11; steam at one path of outlet of the intermediate pressure cylinder 3 enters a backpressure steam turbine 14 through a steam extraction valve group 12 and a first valve 13; steam at one path of outlet of the intermediate pressure cylinder 3 enters a high-pressure heating network heater 21 through a steam extraction valve group 12; steam at the outlet of the backpressure steam turbine 14 enters a low-pressure heating network heater 22 through a second valve 19; the back pressure turbine 14 and the motor 17 are connected with a gear box 15, a coupler 23 and an overrunning clutch 16; the output shaft end of the back pressure turbine 14 is connected with the gear box 15, the output shaft end of the gear box 15 is connected with the coupler 23, the output shaft end of the coupler 23 is connected with the overrunning clutch 16, and the output shaft end of the overrunning clutch 16 is connected with the motor 17; the back pressure turbine 14, the gear box 15, the coupling 23 and the overrunning clutch 16 are coaxially connected with the motor 17.
The working principle of the invention is as follows:
in a heating season, the heating extraction steam is preferentially utilized to drive the backpressure steam turbine 14 to do work, the air compressor 18 is driven to operate firstly, if the backpressure steam turbine 14 has surplus output force, the motor 17 is converted into a power generation state, the backpressure steam turbine 14 drives the power generation to supply to the service power system 20 for auxiliary machines in a plant, the service power rate is reduced, the online electric quantity is increased, and the unit operation economy is improved; if the output of the back pressure turbine 14 is not enough to completely drive the air compressor 18 to operate, the motor 17 is switched to a power consumption state, and power is supplied from the service power system 20 to drive the air compressor 18 to operate together with the back pressure turbine 14.
Heating season:
the steam extraction valve group 12 and the second valve 19 are opened, the first valve 13 is opened at the same time, the output shaft end of the backpressure steam turbine 14 is connected with the gear box 15, the output shaft end of the gear box 15 is connected with the coupler 23, and the output shaft end of the coupler 23 is connected with the overrunning clutch 16; the output shaft end of the overrunning clutch 16 is connected with a motor 17 (the motor 17 can take power consumption from the service power system 20 and can also generate power to transmit electric energy to the service power system 20), and the output shaft end of the motor 17 is connected with an air compressor 18. The electric motor 17 is electrically connected to the service system 20.
Main steam at the outlet of the boiler 1 enters the high-pressure cylinder 2 to do work, exhaust steam enters the boiler 1 again to perform secondary heating, outlet reheated steam enters the intermediate pressure cylinder 3 to do work, the heat supply butterfly valve 11 is adjusted at the moment, heating extraction steam passes through the extraction valve group 12 and preferentially enters the backpressure steam turbine 14 through the first valve 13 to drive the backpressure steam turbine to rotate to do work. When the output force of the back pressure turbine 14 is not supplied to the air compressor 18 and is still surplus, the motor 17 is driven to generate power, at the moment, the motor 17 is in a power generation state, and the generated power enters the auxiliary power system 20; when the output of the back pressure turbine 14 is insufficient to supply the air compressor 18 for consumption, the motor 17 is in a power consumption state, and power is supplied from the service power system 20 to drive the air compressor 18 to operate together with the back pressure turbine 14. The back pressure turbine 14 discharges steam into a low pressure heat supply network heater 22 to heat the heat supply network circulating water. If residual heating extraction steam exists, the residual heating extraction steam enters the high-pressure heating network heater 21 to heat the circulating water of the heating network according to the original heating extraction steam operation mode. The steam condensate of the high-pressure heating network heater 21 and the low-pressure heating network heater 22 is converged together and returns to the system condenser 10. The residual steam part of the steam discharged by the intermediate pressure cylinder 3 except through the steam extraction valve group 12 then enters the low pressure cylinder 4 to do work, the discharged steam enters the condenser 10 to be condensed, condensed water enters the deaerator 6 through the low pressure heater 8 after passing through the condensed water pump 9, finally the condensed water is boosted through the water feeding pump 7 and enters the boiler 1 to be heated after passing through the high pressure heater 5, and the condensed water becomes high-temperature steam and then enters the high pressure cylinder 2 to continue to do work, so that the thermodynamic cycle is completed.
If the backpressure steam turbine 14 has a fault, the first valve 13 and the second valve 19 are closed, the backpressure steam turbine 14 stops steam inlet and is disconnected with the motor 17, all steam enters the high-pressure heat supply network heater 21 to heat supply network circulating water, at the moment, the motor 17 becomes in a power consumption state, power is supplied from the station power system 20, and the air compressor 20 is driven to operate independently.
Non-heat supply season:
and closing the steam extraction valve group 12, the first valve 13 and the second valve 19, stopping steam admission of the backpressure steam turbine 14, separating the backpressure steam turbine from the motor 17, and driving the motor 17 to be in a power consumption state at the moment, so that power is supplied from the service power system 20, the air compressor 20 is driven to operate independently, and the unit operates according to a normal unit pure condensation mode. Main steam at the outlet of the boiler 1 enters the high-pressure cylinder 2 to do work, exhaust steam enters the boiler 1 again to perform secondary heating, the outlet reheated steam enters the intermediate pressure cylinder 3 to do work, at the moment, the heat supply butterfly valve 11 is fully opened, the exhaust steam of the intermediate pressure cylinder 3 enters the low-pressure cylinder 4 to do work, the exhaust steam enters the condenser 10 to be condensed, condensed water passes through the condensed water pump 9 and then enters the deaerator 6 through the low-pressure heater 8, finally, the condensed water is boosted through the water feed pump 7 and enters the boiler 1 to be heated after passing through the high-pressure heater 5, the condensed water becomes high-temperature steam and then enters the high-pressure cylinder 2 to continue to do work, and thermodynamic cycle is completed.
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 (8)
1. The utility model provides a vapour, electricity double-driven compressed air prepares system based on combined heat and power generation unit which characterized in that includes: the system comprises a boiler (1), a high-pressure cylinder (2), a medium-pressure cylinder (3), a low-pressure cylinder (4), a backpressure steam turbine (14), a high-pressure heat supply network heater (21), a low-pressure heat supply network heater (22), a condenser (10), a motor (17), a high-pressure and low-pressure heater group, an air compressor (18) and a service power system (20);
the steam of the boiler (1) enters the high-pressure cylinder (2) to do work and then returns to the boiler (1) to be heated again, and the reheated steam of the boiler (1) enters the intermediate-pressure cylinder (3) to do work; the steam at the outlet of the intermediate pressure cylinder (3) is divided into three paths, wherein one path of the steam enters a backpressure steam turbine (14), the other path of the steam enters a high-pressure heating network heater (21), and the other path of the steam enters a low pressure cylinder (4);
the exhaust steam of the backpressure steam turbine (14) enters a low-pressure heat supply network heater (22) to generate condensed water; the steam of the high-pressure heating network heater (21) generates condensed water; condensed water of the low-pressure heating network heater (22) and the condensed water of the high-pressure heating network heater (21) enter the condenser (10) together; the exhaust steam of the low-pressure cylinder (4) enters a condenser (10) to generate condensed water, and three paths of condensed water in the condenser (10) are converged, heated by a high-pressure and low-pressure heater group and then enter a boiler (1) to realize thermodynamic cycle;
the back pressure turbine (14) drives an electric motor (17) and an air compressor (18) to operate through steam driving, and the electric quantity generated by the electric motor (17) is transmitted to a plant power system (20).
2. The steam and electricity double-drive compressed air preparation system based on the cogeneration unit according to claim 1, wherein when the output of the back pressure turbine (14) cannot meet the requirement of driving the air compressor (18), the power plant system (20) supplies power to the electric motor (17), and the electric motor (17) and the back pressure turbine (14) drive the air compressor (18) to operate together.
3. The cogeneration unit-based steam and electricity dual-drive compressed air production system according to claim 1, wherein the high-low pressure heater group comprises a low pressure heater (8) and a high pressure heater (5); a deaerator (6) and a water feeding pump (7) are connected between the low-pressure heater (8) and the high-pressure heater (5); the outlet of the low-pressure heater (8) is connected with the inlet of the deaerator (6), the outlet of the deaerator (6) is connected with the inlet of the water feeding pump (7), the outlet of the water feeding pump (7) is connected with the inlet of the high-pressure heater (5), and the outlet of the high-pressure heater (5) is connected with the inlet of the boiler (1).
4. The steam and electricity double-drive compressed air preparation system based on the cogeneration unit according to claim 3, wherein a condensate pump (9) is connected between the condenser (10) and the low-pressure heater (8).
5. The steam and electricity double-drive compressed air preparation system based on the cogeneration unit of claim 1, wherein the steam at one outlet of the intermediate pressure cylinder (3) enters the low pressure cylinder (4) through a heat supply butterfly valve (11); steam at one path of outlet of the intermediate pressure cylinder (3) enters a backpressure steam turbine (14) through a steam extraction valve group (12) and a first valve (13); steam at one path of outlet of the intermediate pressure cylinder (3) enters the high-pressure heating network heater (21) through the steam extraction valve group (12).
6. The cogeneration unit-based steam and electricity double-drive compressed air generation system according to claim 1, wherein the steam at the outlet of the back pressure turbine (14) enters the low pressure heating network heater (22) through a second valve (19).
7. The cogeneration unit-based steam and electricity double-drive compressed air production system according to claim 1, wherein the back pressure turbine (14) and the electric motor (17) are connected with a gear box (15), a coupling (23) and an overrunning clutch (16); the output shaft end of the backpressure steam turbine (14) is connected with the gear box (15), the output shaft end of the gear box (15) is connected with the coupler (23), the output shaft end of the coupler (23) is connected with the overrunning clutch (16), and the output shaft end of the overrunning clutch (16) is connected with the motor (17).
8. The cogeneration unit-based steam and electricity double-drive compressed air production system according to claim 7, wherein the back pressure turbine (14), the gear box (15), the coupling (23) and the overrunning clutch (16) are coaxially connected with the electric motor (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111212097.9A CN113864002A (en) | 2021-10-18 | 2021-10-18 | Steam and electricity double-drive compressed air preparation system based on cogeneration unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111212097.9A CN113864002A (en) | 2021-10-18 | 2021-10-18 | Steam and electricity double-drive compressed air preparation system based on cogeneration unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113864002A true CN113864002A (en) | 2021-12-31 |
Family
ID=79000195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111212097.9A Pending CN113864002A (en) | 2021-10-18 | 2021-10-18 | Steam and electricity double-drive compressed air preparation system based on cogeneration unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113864002A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115479266A (en) * | 2022-09-06 | 2022-12-16 | 西安热工研究院有限公司 | High-parameter industrial steam supply system and method for steam-gas co-production |
| US20230193908A1 (en) * | 2020-05-26 | 2023-06-22 | Yara International Asa | Method and system for operating a gas compressor in an ammonia and urea plant |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208594974U (en) * | 2018-08-07 | 2019-03-12 | 西安热工研究院有限公司 | A kind of Combined cycle gas-steam turbine UTILIZATION OF VESIDUAL HEAT IN unit using compression heat pump |
| CN110735675A (en) * | 2019-11-15 | 2020-01-31 | 浙江浙能兴源节能科技有限公司 | compressed air preparation system based on total heat recovery of thermoelectric unit |
| CN112065518A (en) * | 2020-09-29 | 2020-12-11 | 西安热工研究院有限公司 | Steam-electricity dual-drive power generation system for energy storage of liquid compressed air of coal-fired unit |
| CN113090542A (en) * | 2021-04-08 | 2021-07-09 | 西安热工研究院有限公司 | Steam-electricity double-drive water pump system of indirect air cooling unit based on double-feed system |
-
2021
- 2021-10-18 CN CN202111212097.9A patent/CN113864002A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208594974U (en) * | 2018-08-07 | 2019-03-12 | 西安热工研究院有限公司 | A kind of Combined cycle gas-steam turbine UTILIZATION OF VESIDUAL HEAT IN unit using compression heat pump |
| CN110735675A (en) * | 2019-11-15 | 2020-01-31 | 浙江浙能兴源节能科技有限公司 | compressed air preparation system based on total heat recovery of thermoelectric unit |
| CN112065518A (en) * | 2020-09-29 | 2020-12-11 | 西安热工研究院有限公司 | Steam-electricity dual-drive power generation system for energy storage of liquid compressed air of coal-fired unit |
| CN113090542A (en) * | 2021-04-08 | 2021-07-09 | 西安热工研究院有限公司 | Steam-electricity double-drive water pump system of indirect air cooling unit based on double-feed system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230193908A1 (en) * | 2020-05-26 | 2023-06-22 | Yara International Asa | Method and system for operating a gas compressor in an ammonia and urea plant |
| CN115479266A (en) * | 2022-09-06 | 2022-12-16 | 西安热工研究院有限公司 | High-parameter industrial steam supply system and method for steam-gas co-production |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103644004B (en) | The cogeneration system of a kind of pair of turbine, combined cycle | |
| CN210738628U (en) | System for distributed combined cycle generator set collaborates power peak regulation and heat supply | |
| CN203685319U (en) | Double-turbine combined-cycle combined heat and power supplying system | |
| CN112178615B (en) | Electric-steam-air cooling multi-combined supply system based on liquid compressed air energy storage system | |
| CN210509309U (en) | Steam complementary energy utilization coupling steam extraction heat supply system for thermoelectric unit electric power peak regulation | |
| CN111706411A (en) | Thermodynamic system for transforming back pressure unit into extraction condensing unit and working method | |
| CN202417632U (en) | Energy-recovery steam turbine electricity generating and drive compressor sets sharing auxiliary machine system | |
| CN113864002A (en) | Steam and electricity double-drive compressed air preparation system based on cogeneration unit | |
| CN106761982A (en) | A kind of new part backheating gas turbine combined cycle system | |
| CN106437875B (en) | Fired power generating unit working medium bypassing circulation peak regulation system | |
| CN112065514A (en) | Steam-drive liquid compressed air energy storage peak shaving system based on low-pressure cylinder zero-output technology | |
| CN212389395U (en) | Water supply combined cold recycling system for improving steam supply capacity of boiler | |
| CN105275616A (en) | Combined heat, water and power generation system | |
| CN103982252A (en) | Novel process combination of high-speed and efficient single reheating steam turbine and power generation of small power plant | |
| CN216477510U (en) | Improve load regulation ability's many antithetical couplet of cooling, heating and power confession system | |
| CN111663972A (en) | Arrange high-efficient heating system of secondary reheat unit in | |
| CN212837971U (en) | Double-cylinder extraction condensation distributed combined cycle steam turbine | |
| CN210239764U (en) | Arrange high-efficient heating system of secondary reheat unit in | |
| CN104594964B (en) | A kind of novel single shaft gas theory thermal power plant unit system | |
| CN204200282U (en) | A kind of space division system compression device drive unit | |
| CN212406838U (en) | Condensate water combined utilization system for improving cold and steam supply capacity of boiler | |
| CN115479266A (en) | High-parameter industrial steam supply system and method for steam-gas co-production | |
| CN110056402B (en) | Steam complementary energy utilization coupling steam extraction heat supply system and adjusting method | |
| CN212481250U (en) | Deaerator combined utilization system for improving cold and re-steam supply capacity of boiler | |
| CN212406821U (en) | Steam-drive liquid compressed air energy storage peak shaving system based on low-pressure cylinder zero-output technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211231 |
|
| RJ01 | Rejection of invention patent application after publication |