CN211950614U - SCO2Brayton cycle power generation device and power generation system - Google Patents
SCO2Brayton cycle power generation device and power generation system Download PDFInfo
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- CN211950614U CN211950614U CN202020343136.3U CN202020343136U CN211950614U CN 211950614 U CN211950614 U CN 211950614U CN 202020343136 U CN202020343136 U CN 202020343136U CN 211950614 U CN211950614 U CN 211950614U
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Abstract
The present application provides an SCO2Brayton cycle power generation facility and power generation system, this power generation facility includes: turbine, generator, compressor, regenerator, heater, cooler and CO2Buffer tank, pre-charging in power generation deviceIncorporating CO for full power operation of the power plant2When starting the power plant, by CO2The buffer tank is used for filling high-pressure CO into the power generation device2The turbine is driven to rotate, so that the compressor is driven to rotate, when the outlet pressure of the compressor is higher than the inlet pressure of the compressor, the turbine drives the compressor and the generator to rotate simultaneously, the generator starts to generate electricity, the self-starting of the power generation device is realized, the control difficulty of the system is greatly reduced, the fault points of the system are reduced, the application scenes of the system are increased, and the adaptability of the system is improved.
Description
Technical Field
The application relates to the field of electric power, in particular to an SCO2Brayton cycle power generation facility and power generation system.
Background
Supercritical carbon dioxide (SCO)2) The power generation system is a Brayton cycle system using carbon dioxide in a supercritical state as a working medium, and therefore, is also called a supercritical carbon dioxide Brayton cycle power generation system. The supercritical carbon dioxide Brayton cycle power generation system has the advantages of high efficiency, small system volume, low noise, environmental protection, economy and the like, is considered as one of the main development directions of future power generation, and has good application prospects in various fields.
In the prior art, SCO2When the output power of the turbine is greater than the consumed power of the host system, the motor generator is switched to a generator mode, and the turbine drives the compressor and the motor generator to rotate so as to realize power generation.
However, existing SCOs2When the Brayton cycle power generation system is started, the motor generator needs to be switched between a motor mode and a generator mode, and the control of the system is complex, so that the control difficulty of the system is increased.
SUMMERY OF THE UTILITY MODEL
The present application provides an SCO2Brayton cycle power generation device and system to solve SCO in the prior art2The control difficulty is high when the Brayton cycle system is started.
In a first aspect, the present application provides an SCO2Brayton cycle power plant comprising:
turbine, generator, compressor, regenerator, heater, cooler and CO2A buffer tank;
the turbine, the generator and the compressor are connected through the same rotating shaft;
the heat regenerator is respectively connected with the turbine, the compressor, the heater and the cooler through a heat regenerator-turbine pipeline, a heat regenerator-compressor pipeline, a heat regenerator-heater pipeline and a heat regenerator-cooler pipeline; the heater is connected with the turbine through a heater-turbine pipeline; the cooler is connected with the compressor through a cooler-compressor pipeline;
the CO is2Buffer tank passing CO2The buffer tank pipeline is connected to the heat regenerator-compressor pipeline;
the power generation device is pre-filled with CO for enabling the power generation device to operate at full power2When the power generation device is started, the CO is used2The buffer tank is used for charging high-pressure CO into the power generation device2The heat regenerator and the heater are used for heating the high-pressure CO2Heating to obtain high-temperature high-pressure supercritical carbon dioxide SCO2And the SCO with high temperature and high pressure2Feeding the SCO to the turbine to heat the SCO2Pushing the turbine to rotate, thereby driving the compressor to rotate; the regenerator is also used to regenerate SCO output from the turbine2Pre-cooling, and mixing the pre-cooled SCO2Delivering the mixture to the cooler for cooling; the compressor is used for cooling the SCO of the cooler2Pressurizing when the outlet pressure of the compressor is higher than the inlet pressure of the compressorWhen the pressure is applied to the opening, the turbine drives the compressor and the generator to rotate simultaneously, so that the generator generates electricity.
Optionally, the power generation apparatus further comprises: a circulation pump and a circulation pump line;
the two ends of the circulating pump pipeline are respectively connected with the cooler-compressor pipeline and the heat regenerator-compressor pipeline;
the circulating pump is arranged on the circulating pump pipeline; the circulating pump is used for pushing CO in the power generation device when the power generation device is started2And (4) flowing.
Optionally, in the CO2Before the buffer tank starts to work, the heat regenerator and the heater are also used for the CO charged in the power generation device2Heating is carried out.
Optionally, the power generation apparatus further comprises: a circulating pump pipeline control valve;
the circulating pump pipeline control valve is arranged at the outlet of the circulating pump; the circulating pump pipeline control valve is used for controlling whether the circulating pump pipeline is in effect or not; when the circulating pump works, the circulating pump pipeline control valve is in an opening state.
Optionally, the power generation apparatus further comprises: a compressor outlet regulating valve;
the compressor outlet regulating valve is arranged at the outlet of the compressor; the compressor outlet regulating valve is used for regulating the outlet pressure of the compressor;
and when the power generation device is started, the outlet regulating valve of the compressor is in a closed state.
Optionally, the power generation apparatus further comprises: CO22An outlet regulating valve of the buffer tank;
the CO is2The buffer tank outlet regulating valve is arranged on the CO2An outlet of the buffer tank; the CO is2The outlet regulating valve of the buffer tank is used for controlling the CO2Whether the buffer tank pipeline is functional;
when the CO is present2When the buffer tank works, the CO2Buffer tank outlet regulating valveIn the open state.
Optionally, the power generation apparatus further comprises: a cooler inlet regulating valve, a heater inlet regulating valve and a turbine inlet regulating valve;
the cooler inlet regulating valve, the heater inlet regulating valve and the turbine inlet regulating valve are respectively arranged on the heat regenerator-cooler pipeline, the heat regenerator-heater pipeline and the heater-turbine pipeline;
the cooler inlet adjusting valve, the heater inlet adjusting valve and the turbine inlet adjusting valve are respectively used for adjusting the flow of working media entering the cooler, the heater and the turbine;
when the power generation device is started, the cooler inlet adjusting valve, the heater inlet adjusting valve and the turbine inlet adjusting valve are all in an opening state.
Optionally, the power generation apparatus further comprises: a regenerator bypass valve and a regenerator bypass line;
the two ends of the heat regenerator bypass pipeline are respectively connected to the heat regenerator-compressor pipeline and the heat regenerator-cooler pipeline;
the regenerator bypass valve is arranged on the regenerator bypass pipeline and is used for shunting working media entering the regenerator;
and when the power generation device is started, the bypass valve of the heat regenerator is in a closed state.
Optionally, the power generation apparatus further comprises: a turbine bypass valve and a turbine bypass line;
the two ends of the turbine bypass pipeline are respectively connected to the heater-turbine pipeline and the heat regenerator-turbine pipeline;
the turbine bypass valve is arranged on the turbine bypass pipeline and used for shunting working media entering the turbine;
when the power generation device is started, the turbine bypass valve is in a closed state.
Second partyThe present application provides an SCO2A brayton cycle power generation system comprising: auxiliary equipment and SCO as described above2Brayton cycle power plant.
SCO provided by the present application2Brayton cycle power generation facility and power generation system, this power generation facility includes: turbine, generator, compressor, regenerator, heater, cooler and CO2The turbine, the generator and the compressor are connected through the same rotating shaft, and the heat regenerator is respectively connected with the turbine, the compressor, the heater and the cooler through a heat regenerator-turbine pipeline, a heat regenerator-compressor pipeline, a heat regenerator-heater pipeline and a heat regenerator-cooler pipeline; the heater is connected to the turbine via a heater-turbine line, the cooler is connected to the compressor via a cooler-compressor line, and the CO is supplied to the turbine2Buffer tank 116 passing CO2The buffer tank pipeline is connected with the heat regenerator-compressor pipeline. The power generation device is pre-filled with CO for enabling the power generation device to run at full power2When starting the power plant, by CO2The buffer tank is used for filling high-pressure CO into the power generation device2Regenerator and heater for high pressure CO2Heating to obtain high-temperature and high-pressure SCO2And SCO of high temperature and high pressure2Feeding to a turbine for SCO at high temperature and high pressure2The turbine is driven to rotate, thereby driving the compressor to rotate, and the regenerator is also used for SCO output from the turbine2Pre-cooling, and mixing the pre-cooled SCO2Delivering to a cooler for cooling, and cooling the SCO cooled by the cooler by a compressor2The compressor and the generator are driven by the turbine to rotate simultaneously when the outlet pressure of the compressor is higher than the inlet pressure of the compressor, so that the generator generates electricity, the self-starting of the power generation device is realized, the control difficulty of the system is greatly reduced because the generator or the motor generator is not needed as a power device, the fault points of the system are reduced, the application scenes of the system are increased, and the adaptability of the system is improved.
Drawings
In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a first embodiment of an SCO2 brayton cycle power generation apparatus provided in the embodiment of the present application;
FIG. 2 is an SCO provided in an embodiment of the present application2The structural schematic diagram of the second embodiment of the Brayton cycle power generation device.
Description of reference numerals:
100-a power generation device;
110-a turbine;
111-a generator;
112-a compressor;
113-a regenerator;
114-a heater;
115-a cooler;
116-CO2a buffer tank;
117-circulation pump;
120-regenerator-turbine line;
121-regenerator-compressor line;
122-regenerator-heater line;
123-regenerator-cooler line;
124-heater-turbine line;
125-cooler-compressor line;
126-CO2a buffer tank pipeline;
127-circulation pump line;
128-regenerator bypass line;
129-turbine bypass line;
130-circulation pump pipeline control valve;
131-compressor outlet regulating valve;
132-CO2an outlet regulating valve of the buffer tank;
133-cooler inlet modulation valve;
134-heater inlet regulating valve;
135-turbine inlet regulating valve;
136-a regenerator bypass valve;
137-turbine bypass valve.
Detailed Description
To make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application, and it is obvious that the described embodiments are some, but not all embodiments of the present application. 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 application.
The brayton cycle is a typical thermodynamic cycle which is firstly proposed by brayton, an american scientist and takes gas as a working medium. The simple Brayton cycle gas working medium realizes high-efficiency energy conversion through four processes of isentropic compression, isobaric heat absorption, isentropic expansion and isobaric cooling. When the working medium is in a supercritical state, the change of the phase state of the working medium is avoided, the consumption of compression work is reduced, and the cycle efficiency of the working medium can be greatly improved.
Any one substance exists in three phases: solid, liquid and gaseous states, and at a certain temperature and pressure, the phase state of a substance changes, thereby exhibiting different phase states. The point at which the two phases of the gas and the liquid are in an equilibrium state is called a critical point, the temperature and the pressure corresponding to the critical point are respectively called a critical temperature and a critical pressure, the state of the substance at the critical point is called a critical state, and if the temperature and the pressure of the substance in the critical state are continuously increased, the substance enters a supercritical state when the temperature and the pressure are increased to exceed the critical temperature and the critical pressure.
When CO is present2When the temperature and the pressure of the reaction solution reach the critical temperature of 31.1 ℃ and the critical pressure of 7.38Mpa respectively, CO2Will be in a supercritical state, i.e. to SCO2。SCO2Between a liquid andthe gases have the special physical characteristics of small gas viscosity and high liquid density, so that the gas-liquid heat exchanger has the typical advantages of good fluidity, high heat transfer efficiency, small compressibility and the like, and in addition, SCO is used2As the circulating working medium, the method also has the advantages of good engineering realizability, high circulating efficiency, small occupied area of components and systems, good economic benefit and the like, so that the SCO2Is considered to be one of the most promising brayton cycle working fluids.
The overall idea of the embodiment of the application is as follows: SCO in the prior art2The main system of the brayton cycle system needs a motor and a generator, the motor drives the main system to start, and the generator is driven by the main system to generate power after the start is completed, or a motor generator is needed, the motor generator is used as the motor to drive the system to start during the start, and the motor generator is used as the generator to generate power after the start is completed. The application provides an SCO that does not need electric power to drive a shaft to transport2Brayton cycle power generation system, in such SCO2In the starting process of the Brayton cycle power generation system, a motor is not needed, the control of the system is simplified, the fault points of the system are reduced, and the SCO is enhanced2Adaptability of the Brayton cycle power generation system. In addition, the technical scheme provided by the embodiment of the application is particularly suitable for being used in the scene without a power supply.
FIG. 1 is an SCO provided in an embodiment of the present application2As shown in fig. 1, a schematic structural diagram of a first embodiment of a brayton cycle power generation apparatus, in this embodiment, a power generation apparatus 100 includes:
The turbine 110, the generator 111 and the compressor 112 are connected by the same rotating shaft.
The regenerator 113 is connected to the turbine 110, the compressor 112, the heater 114 and the cooler 115 through a regenerator-turbine line 120, a regenerator-compressor line 121, a regenerator-heater line 122 and a regenerator-cooler line 123, respectively; the heater 114 is connected to the turbine 110 by a heater-turbine line 124; the cooler 115 is connected to the compressor 112 by a cooler-compressor line 125.
CO2Buffer tank 116 passing CO2A buffer tank line 126 is connected to the regenerator-compressor line 121.
The power generation device 100 is pre-charged with CO for operating the power generation device 100 at full power2CO when the power generation plant 100 is started2The buffer tank 116 is used to charge high-pressure CO into the power generation apparatus 1002 Regenerator 113 and heater 114 are used for high pressure CO2Heating to obtain high-temperature high-pressure supercritical carbon dioxide SCO2And SCO of high temperature and high pressure2Is fed to the turbine 110 to subject the SCO to high temperature and high pressure2The turbine 110 is driven to rotate, thereby driving the compressor 112 to rotate; the regenerator 113 is also used to regenerate SCO output from the turbine 1102Pre-cooling, and mixing the pre-cooled SCO2Sent to the cooler 115 for cooling; compressor 112 is used to cool SCO in cooler 1152Pressurization is performed, and when the outlet pressure of the compressor 112 is higher than the inlet pressure thereof, the turbine 110 drives the compressor 112 and the generator 111 to rotate simultaneously, so that the generator 111 generates electricity.
The turbine 110 is also called a turbine, an expander, etc., and is a rotary power device, and a high-temperature and high-pressure working medium expands in the turbine 110 to convert the heat energy of the working medium into mechanical energy and apply work to the outside. When the expansion of the working medium in the turbine 110 is accelerated, the pressure and temperature are reduced and the speed is increased.
The generator 111 is a device that converts mechanical energy into electrical energy using the law of electromagnetic induction. The generator 111 in this embodiment may be various forms of synchronous generators, asynchronous generators, single-phase generators, three-phase generators, and the like.
The compressor 112 is a driven fluid machine for lifting a low-pressure working medium into a high-pressure working medium, in the embodiment of the present invention, the compressor 112 may be a screw compressor, or may be other types of compressors such as a centrifugal compressor, an axial compressor, or a centrifugal + axial compressor, which is not limited herein.
The regenerator 113 is also called a gas-liquid heat exchanger, and in general, the regenerator is a container with openings at two ends, and different fillers, such as a wire mesh, a metal ball with a small diameter, and the like, are filled in the regenerator, so that heat exchange is realized by switching cold air flow and hot air flow. It is in SCO2The Brayton cycle has two functions, one is to heat the working medium at the outlet of the compressor, save fuel and improve the heat efficiency, and the other is to reduce the temperature of the working medium at the outlet of the turbine, reduce the use of cooling water, save water resources and reduce the power consumption of the compressor.
In this embodiment, in a possible implementation manner, the heat regenerator 113 is a printed circuit board type heat regenerator.
The heater 114 is industrial waste heat, nuclear reactor, fossil fuel or solar energy, etc. for isobaric heating of the working medium in the cycle due to SCO2The brayton cycle may be used in any type of power plant, such as a thermal power plant, a solar power plant, etc., and thus, the heater 114 used may be different in different types of power plants.
The cooler 115 is used for cooling the working fluid, the cooler usually uses water or air as a coolant to remove heat, and in the embodiment of the present invention, the cooler 115 may be a dividing wall cooler, a spray cooler, a printed circuit board cooler, a jacketed cooler, or a coiled cooler.
CO2The buffer tank 116 is used for storing high pressure CO2CO in this example2The buffer tank 116 may be a diaphragm type buffer tank or a bladder type buffer tank, and is not limited herein.
The power generation system 100 of the present embodiment includes a turbine 110, a generator 111, a compressor 112, a regenerator 113, a heater 114, a cooler 115, and CO2Buffer tank 116 and piping connecting the respective partsAnd a rotating shaft.
The turbine 110, the generator 111, and the compressor 112 are fixed to the same rotating shaft to constitute a main system, and the three are fixed to the same rotating shaft, so that the three rotate at the same speed.
The connection between the heat regenerator 113 and the turbine 110, the connection between the compressor 112, the heater 114 and the cooler 115, the connection between the heater 114 and the turbine 110, and the connection between the cooler 115 and the compressor 112 are realized through corresponding pipelines, so that CO is ensured2Or flow between different parts, whereby SCO2The brayton cycle.
It should be noted that, in this embodiment, for convenience of description, a pipeline connecting the regenerator 113 and the turbine 110 is referred to as a regenerator-turbine pipeline, a pipeline connecting the regenerator 113 and the compressor 112 is referred to as a regenerator-compressor pipeline, and similarly, pipelines connecting the regenerator 113 and the heater 114, the regenerator 113 and the cooler 115, the heater 114 and the turbine 110, and the cooler 115 and the compressor 111 are referred to as a regenerator-heater pipeline, a regenerator-cooler pipeline, a heater-turbine pipeline, and a cooler-compressor pipeline, respectively.
Further, CO in the present embodiment2The buffer tank pipeline 126 is specially used for supplying CO2The buffer tank 116 is connected to a section of the pipeline of the power generation apparatus 100. CO22One end of the buffer tank pipeline 126 is connected with CO2The outlet of buffer tank 116 is connected at the other end to regenerator-compressor line 121. By using CO alone2 Buffer tank pipeline 126 to ensure CO2The surge tank 116 is relatively independent when CO is needed2 Buffer tank 116
In this embodiment, to ensure the power generation device 100 can be started quickly, the SCO needs to be performed inside the power generation device 1002The inside of each piping and equipment of the brayton cycle is pre-charged with CO that enables the power generation apparatus 100 to operate at full power2When starting up the power generation apparatus 100, CO2High pressure CO in surge tank 1162By CO2The buffer tank line 126 and the regenerator-compressor line 121 enter the power plant 100 and are fed via the regenerator 113 and the heater 114The heat is then transferred to the turbine 110, and the impulse drives the turbine 110 to rotate, thereby driving the compressor 112 to operate. CO and heat generated by the regenerator 113 and the heater 1142The buffer tank 116 continuously inputs high-pressure CO2All of the CO inside the power plant 1002Are all converted into SCO2And the rotation speed of the turbine 110 is increased while the outlet pressure of the compressor 112 is gradually increased as the compressor 112 is operated, and when the outlet pressure of the compressor 112 is higher than the inlet pressure thereof, the turbine 110 can drive the compressor 112 and the generator 111 to simultaneously operate, thereby driving the generator 111 to generate electricity.
To save time required for the power plant 100 to start up, in one possible implementation, the CO is passed2The buffer tank charges high-pressure CO into the power generation device 1002Previously, the heat regenerator 113 and the heater 114 were operated to pre-charge CO in the power generation apparatus 1002Heating is carried out.
In this embodiment, the power generation apparatus 100 includes a turbine 110, a generator 111, a compressor 112, a regenerator 113, a heater 114, a cooler 115, and CO2The buffer tank 116, the turbine 110, the generator 111 and the compressor 112 are connected by the same rotating shaft, and the heat regenerator 113 is respectively connected with the turbine 110, the compressor 112, the heater 114 and the cooler 115 by a heat regenerator-turbine pipeline 120, a heat regenerator-compressor pipeline 121, a heat regenerator-heater pipeline 122 and a heat regenerator-cooler pipeline 123; the heater 114 is connected to the turbine 110 by a heater-turbine line 124; the cooler 115 is connected to the compressor 112 via a cooler-compressor line 125, CO2Buffer tank 116 passing CO2A buffer tank line 126 is connected to the regenerator-compressor line 121. The power generation device 100 is pre-charged with CO for operating the power generation device 100 at full power2When the power generation plant 100 is started, CO is passed2The buffer tank 116 charges high-pressure CO into the power generation apparatus 1002 Regenerator 113 and heater 114 for high pressure CO2Heating to obtain high-temperature high-pressure supercritical carbon dioxide SCO2And SCO of high temperature and high pressure2Is fed to the turbine 110 to subject the SCO to high temperature and high pressure2 Push awayThe turbine 110 rotates to drive the compressor 112 to rotate, and the regenerator 113 also couples SCO output from the turbine 1102Pre-cooling, and mixing the pre-cooled SCO2The SCO is sent to a cooler 115 for cooling, and the compressor 112 cools the SCO in the cooler 1152When the outlet pressure of the compressor 112 is higher than the inlet pressure of the compressor, the turbine 110 drives the compressor 112 and the generator 111 to rotate simultaneously, so that the generator 111 generates electricity, the self-starting of the power generation device 100 is realized, the control difficulty of the system is greatly reduced, the fault points of the system are reduced, the application scenes of the system are increased, and the adaptability of the system is improved.
FIG. 2 is an SCO provided in an embodiment of the present application2In addition to the above embodiments, as shown in fig. 2, the schematic structural diagram of the second embodiment of the brayton cycle power generation apparatus, in this embodiment, the power generation apparatus 100 further includes: a circulation pump 117 and a circulation pump line 127.
Both ends of the circulation pump line 127 are connected to the cooler-compressor line 125 and the regenerator-compressor line 121, respectively.
The circulation pump 117 is disposed on the circulation pump line 127, and the circulation pump 117 is used to drive CO in the power generation apparatus 100 when the power generation apparatus 100 is started2And (4) flowing.
The circulation pump 117 is a device capable of circulating the medium in the circulation system, and in this embodiment, the circulation pump 117 is used to circulate CO preliminarily charged in the power generation device 100 when the power generation device 100 is operated2Circulating so that the regenerator 113 and the heater 114 can couple CO in the power generation device 1002The heating is performed quickly and uniformly, thereby improving the starting efficiency of the power generation device 100 and saving the time required for starting the power generation device 100.
The circulation pump line 127 is connected as a separate line between the cooler-compressor line 125 and the regenerator-compressor line 121, ensuring the relative independence of the circulation pump 117, so that the system circulation is not affected after the power plant 100 is started.
According to the use requirement, different control valves can be added in the circulating system to improve the control precision and control accuracy.
In one possible implementation, with continued reference to fig. 2, the power plant 100 further includes a circulation pump line control valve 130, as shown in fig. 2. The circulation pump line control valve 130 is provided at an outlet of the circulation pump 117, the circulation pump line control valve 130 is used to control whether the circulation pump line 127 is active, and when the circulation pump 117 operates, the circulation pump line control valve 130 is in an open state.
In this implementation, the circulation pump pipeline control valve 130 is disposed on the circulation pump pipeline 127 and at the outlet of the circulation pump 117, and optionally, a circulation pump pipeline control valve 130 may be disposed at the outlet and the inlet of the circulation pump 117, respectively. The circulation pump line control valve 130 is used to control whether the circulation pump line 127 is functioning, and specifically, when the circulation pump 117 is operating, the circulation pump line control valve 130 is controlled to be in an open state to ensure that the circulation pump line 127 is in communication with other lines in the power generation apparatus 100, at which time, CO is present2Or SCO2Can circulate through the circulating pump pipeline 127, and the opening degree of the circulating pump pipeline can be adjusted according to the requirement, thereby adjusting CO in the pipeline2Or SCO2When the circulation pump 117 does not work, the circulation pump pipeline control valve 130 is controlled to be completely closed, at this time, the circulation pump pipeline 127 becomes a dead line, the working medium does not circulate through the circulation pump pipeline 127, and it is ensured that excessive CO is not generated2Or SCO2Remains in the circulation pump line 127 so as not to affect the circulation efficiency of the entire system.
In another possible implementation, with continued reference to fig. 2, as shown in fig. 2, the power generation apparatus 100 further includes: the compressor outlet regulating valve 131. A compressor outlet regulating valve 131 is provided at the outlet of the compressor 112, and the compressor outlet regulating valve 131 is used to regulate the outlet pressure of the compressor 112. When the power generation device 100 is started, the compressor outlet adjustment valve 131 is in a closed state.
In this embodiment, in order to rapidly increase the outlet pressure of the compressor 112 to a set value (the outlet pressure is higher than the inlet pressure), a compressor outlet regulating valve 131 is provided on the regenerator-compressor line 121, and the compressor outlet regulating valve 131 is controlled to be in a fully closed state when the power generation apparatus 100 is started.
It will be appreciated that the compressor outlet adjustment valve 131 is positioned as close as possible to the compressor 112.
In yet another possible implementation, with continued reference to fig. 2, as shown in fig. 2, the power generation apparatus 100 further includes: CO22The surge tank outlet regulating valve 132. CO22The surge tank outlet regulating valve 132 is arranged at the CO2At the outlet of the buffer tank 116, CO2Surge tank outlet regulating valve 132 for controlling CO2Whether surge tank line 126 is active, when CO is2When the buffer tank 116 is in operation, CO2The surge tank outlet regulating valve 132 is in an open state.
In this implementation, CO2The surge tank outlet regulating valve 132 is arranged at the CO2On the buffer tank line 126 and is disposed at the CO2At the outlet of the buffer tank 116. CO22Surge tank outlet regulating valve 132 for controlling CO2Whether the surge tank line 126 is active, specifically, when CO is active2When the buffer tank 116 is in operation, CO2The buffer tank outlet regulating valve 132 is in an open state to ensure CO2The buffer tank pipeline 126 communicates with other pipelines in the power plant 100, in which case the CO is present2High pressure CO in surge tank 1162Can pass through CO2The buffer tank pipe 126 flows into another pipe of the power generation system 100, and the opening degree thereof can be adjusted as necessary, whereby the high-pressure CO flows out2When the flow rate of CO is2Controlling CO when surge tank 116 is not operating2The surge tank outlet regulator valve 132 is in full closure, at which time the CO is2The buffer tank pipeline 126 becomes a dead line, so that excessive circulating working medium is prevented from remaining in CO2In the buffer tank line 126 so as not to affect the circulation efficiency of the entire system.
In yet another possible implementation, with continued reference to fig. 2, as shown in fig. 2, the power generation apparatus 100 further includes: a cooler inlet regulating valve 133, a heater inlet regulating valve 134, and a turbine inlet regulating valve 135.
The cooler inlet regulating valve 133, the heater inlet regulating valve 134, and the turbine inlet regulating valve 135 are disposed on the regenerator-cooler line 123, the regenerator-heater line 122, and the heater-turbine line 124, respectively; the cooler inlet regulating valve 133, the heater inlet regulating valve 134 and the turbine inlet regulating valve 135 are used for regulating the flow of the working medium entering the cooler 115, the heater 114 and the turbine 110, respectively; when the power generation device 100 is started, the cooler inlet adjustment valve 133, the heater inlet adjustment valve 134, and the turbine inlet adjustment valve 135 are all in an open state.
In this embodiment, the opening of the cooler inlet adjusting valve 133, the heater inlet adjusting valve 134, and the turbine inlet adjusting valve 135 are adjustable by providing the cooler inlet adjusting valve 133, the heater inlet adjusting valve 134, and the turbine inlet adjusting valve 135, so that CO entering the cooler 115, the heater 114, and the turbine 110 is adjusted2Or SCO2The flow control is performed, thereby being beneficial to improving the control precision and the control accuracy of the system during or after the starting process of the power generation device 100.
In yet another possible implementation, with continued reference to fig. 2, as shown in fig. 2, the power generation apparatus 100 further includes: a regenerator bypass valve 136 and a regenerator bypass line 128.
Two ends of the regenerator bypass line 128 are connected to the regenerator-compressor line 121 and the regenerator-cooler 123 line, respectively; the regenerator bypass valve 136 is arranged on the regenerator bypass pipeline 128, and the regenerator bypass valve 136 is used for shunting the working medium entering the regenerator 113; at power plant 100 start-up, regenerator bypass valve 136 is in a closed state.
In this implementation, the regenerator bypass valve 136 is provided, and the regenerator bypass line 128 is provided, so as to split the working medium entering the regenerator 113 according to the requirements, such as flow control requirements and equipment safety requirements, thereby improving the control accuracy and the control accuracy of the system during or after the starting of the power generation apparatus 100, and being beneficial to ensuring the safety of the system and the equipment.
In yet another possible implementation, with continued reference to fig. 2, as shown in fig. 2, the power generation apparatus 100 further includes: a turbine bypass valve 137 and a turbine bypass line 129.
The two ends of the turbine bypass line 129 are connected to the heater-turbine line 124 and the regenerator-turbine line 120, respectively; a turbine bypass valve 137 is provided in the turbine bypass line 129, the turbine bypass valve 137 being used to control SCO entering the turbine 1102Shunting; when the power generation device 100 is started, the turbine bypass valve 137 is closed.
In this implementation, by providing the turbine bypass valve 137 and the turbine bypass pipeline 129, the working medium entering the turbine 110 is diverted according to the requirements, such as the flow control requirement and the equipment safety requirement, so as to improve the control accuracy and the control accuracy of the system during or after the starting of the power generation apparatus 100, and to ensure the safety of the system and the equipment.
In this embodiment, by further providing the power generation apparatus 100 further comprising a circulation pump 117 and a circulation pump pipeline 127, and providing that two ends of the circulation pump pipeline 127 are respectively connected to the cooler-compressor pipeline 125 and the regenerator-compressor pipeline 121, the circulation pump 117 is disposed on the circulation pump pipeline 127, and when the power generation apparatus 100 is started, the circulation pump 117 is used for pushing CO in the power generation apparatus 1002And thus, the starting efficiency of the power generation device 100 is improved, and the time required for starting the power generation device 100 is saved. In addition, different control valves are arranged in the power generation device 100, so that the control precision and the control accuracy of the system in the starting process or after the starting of the power generation device 100 are further improved, and the safety of the system and equipment is improved.
The embodiment of the application also provides an SCO2A brayton cycle power generation system comprising auxiliary equipment and a power plant as described in the previous embodiment or embodiment two.
It is understood that the auxiliary equipment in the power generation system includes a controller, various instruments, and the like.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. SCO (Small cell interconnect)2Brayton cycle power plant, characterized in that includes:
turbine, generator, compressor, regenerator, heater, cooler and CO2A buffer tank;
the turbine, the generator and the compressor are connected through the same rotating shaft;
the heat regenerator is respectively connected with the turbine, the compressor, the heater and the cooler through a heat regenerator-turbine pipeline, a heat regenerator-compressor pipeline, a heat regenerator-heater pipeline and a heat regenerator-cooler pipeline; the heater is connected with the turbine through a heater-turbine pipeline; the cooler is connected with the compressor through a cooler-compressor pipeline;
the CO is2Buffer tank passing CO2The buffer tank pipeline is connected to the heat regenerator-compressor pipeline;
the power generation device is pre-filled with CO for enabling the power generation device to operate at full power2When the power generation device is started, the CO is used2The buffer tank is used for charging high-pressure CO into the power generation device2The heat regenerator and the heater are used for heating the high-pressure CO2Heating to obtain high-temperature high-pressure supercritical carbon dioxide SCO2And the SCO with high temperature and high pressure2Feeding the SCO to the turbine to heat the SCO2Pushing the turbine to rotate, thereby driving the compressor to rotate; the regenerator is also used to regenerate SCO output from the turbine2Pre-cooling, and mixing the pre-cooled SCO2Delivering the mixture to the cooler for cooling; the compression isSCO used for cooling the cooler2And pressurizing, and when the outlet pressure of the compressor is higher than the inlet pressure of the compressor, the turbine drives the compressor and the generator to rotate simultaneously so as to enable the generator to generate electricity.
2. The apparatus of claim 1, wherein the power generation apparatus further comprises: a circulation pump and a circulation pump line;
the two ends of the circulating pump pipeline are respectively connected with the cooler-compressor pipeline and the heat regenerator-compressor pipeline;
the circulating pump is arranged on the circulating pump pipeline; the circulating pump is used for pushing CO in the power generation device when the power generation device is started2And (4) flowing.
3. The apparatus of claim 1, wherein the CO is present in the gas2Before the buffer tank starts to work, the heat regenerator and the heater are also used for the CO charged in the power generation device2Heating is carried out.
4. The apparatus of claim 2, wherein the power generation apparatus further comprises: a circulating pump pipeline control valve;
the circulating pump pipeline control valve is arranged at the outlet of the circulating pump; the circulating pump pipeline control valve is used for controlling whether the circulating pump pipeline is in effect or not; when the circulating pump works, the circulating pump pipeline control valve is in an opening state.
5. The apparatus of claim 1, wherein the power generation apparatus further comprises: a compressor outlet regulating valve;
the compressor outlet regulating valve is arranged at the outlet of the compressor; the compressor outlet regulating valve is used for regulating the outlet pressure of the compressor;
and when the power generation device is started, the outlet regulating valve of the compressor is in a closed state.
6. The apparatus of claim 1, wherein the power generation apparatus further comprises: CO22An outlet regulating valve of the buffer tank;
the CO is2The buffer tank outlet regulating valve is arranged on the CO2An outlet of the buffer tank; the CO is2The outlet regulating valve of the buffer tank is used for controlling the CO2Whether the buffer tank pipeline is functional;
when the CO is present2When the buffer tank works, the CO2The buffer tank outlet regulating valve is in an open state.
7. The apparatus of any one of claims 1-6, wherein the power generation apparatus further comprises: a cooler inlet regulating valve, a heater inlet regulating valve and a turbine inlet regulating valve;
the cooler inlet regulating valve, the heater inlet regulating valve and the turbine inlet regulating valve are respectively arranged on the heat regenerator-cooler pipeline, the heat regenerator-heater pipeline and the heater-turbine pipeline;
the cooler inlet adjusting valve, the heater inlet adjusting valve and the turbine inlet adjusting valve are respectively used for adjusting the flow of working media entering the cooler, the heater and the turbine;
when the power generation device is started, the cooler inlet adjusting valve, the heater inlet adjusting valve and the turbine inlet adjusting valve are all in an opening state.
8. The apparatus of any one of claims 1-6, wherein the power generation apparatus further comprises: a regenerator bypass valve and a regenerator bypass line;
the two ends of the heat regenerator bypass pipeline are respectively connected to the heat regenerator-compressor pipeline and the heat regenerator-cooler pipeline;
the regenerator bypass valve is arranged on the regenerator bypass pipeline and is used for shunting working media entering the regenerator;
and when the power generation device is started, the bypass valve of the heat regenerator is in a closed state.
9. The apparatus of any one of claims 1-6, wherein the power generation apparatus further comprises: a turbine bypass valve and a turbine bypass line;
the two ends of the turbine bypass pipeline are respectively connected to the heater-turbine pipeline and the heat regenerator-turbine pipeline;
the turbine bypass valve is arranged on the turbine bypass pipeline and used for shunting working media entering the turbine;
when the power generation device is started, the turbine bypass valve is in a closed state.
10. SCO (Small cell interconnect)2A brayton cycle power generation system, comprising: auxiliary equipment and SCO according to any of claims 1-92Brayton cycle power plant.
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| CN202020343136.3U CN211950614U (en) | 2020-03-18 | 2020-03-18 | SCO2Brayton cycle power generation device and power generation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983574A (en) * | 2021-02-24 | 2021-06-18 | 中国船舶重工集团公司第七一九研究所 | Supercritical carbon dioxide power generation system and operation method |
| CN113137879A (en) * | 2021-03-12 | 2021-07-20 | 浙江态能动力技术有限公司 | Pressure control heat exchanger and method based on cage type microchannel heat exchange |
| CN114215720A (en) * | 2021-11-26 | 2022-03-22 | 中国科学院工程热物理研究所 | Method for adjusting starting and running of supercritical carbon dioxide circulating compressor |
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2020
- 2020-03-18 CN CN202020343136.3U patent/CN211950614U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983574A (en) * | 2021-02-24 | 2021-06-18 | 中国船舶重工集团公司第七一九研究所 | Supercritical carbon dioxide power generation system and operation method |
| CN112983574B (en) * | 2021-02-24 | 2022-12-13 | 中国船舶重工集团公司第七一九研究所 | Supercritical carbon dioxide power generation system and operation method |
| CN113137879A (en) * | 2021-03-12 | 2021-07-20 | 浙江态能动力技术有限公司 | Pressure control heat exchanger and method based on cage type microchannel heat exchange |
| CN113137879B (en) * | 2021-03-12 | 2022-03-15 | 浙江态能动力技术有限公司 | Pressure control device and method based on cage type microchannel heat exchange |
| CN114215720A (en) * | 2021-11-26 | 2022-03-22 | 中国科学院工程热物理研究所 | Method for adjusting starting and running of supercritical carbon dioxide circulating compressor |
| CN114215720B (en) * | 2021-11-26 | 2024-01-23 | 中国科学院工程热物理研究所 | Starting and running adjusting method of supercritical carbon dioxide circulating compressor |
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