CN221002880U - Quick start peak regulation turbine power generation system - Google Patents
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- CN221002880U CN221002880U CN202322335715.XU CN202322335715U CN221002880U CN 221002880 U CN221002880 U CN 221002880U CN 202322335715 U CN202322335715 U CN 202322335715U CN 221002880 U CN221002880 U CN 221002880U
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Abstract
The rapid start peak regulation turbine power generation system comprises a turbine and a boiler, wherein the turbine comprises a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder, the boiler can produce steam for driving the turbine to generate power under load, the system also comprises a low-pressure cylinder maintenance temperature steam generator, and the low-pressure cylinder maintenance temperature steam generator is used for producing low-pressure cylinder maintenance temperature steam with the same or similar temperature as the steam used for low-pressure cylinder power generation of the turbine; when the combustion system of the boiler stops generating electricity, the low-pressure cylinder maintaining temperature steam generator conveys low-pressure cylinder maintaining temperature steam into the low-pressure cylinder of the steam turbine through a steam inlet of the low-pressure cylinder, and the low-pressure cylinder maintaining temperature steam flows out from a steam outlet of the low-pressure cylinder. The quick-start peak-shaving turbine power generation system has the advantages that the turbine can be in a thermal state standby state in a non-power generation or micro-power generation state, once the power grid is needed, the turbine can be quickly responded and started in a thermal state, and the turbine can immediately enter a normal power generation state.
Description
Technical Field
The utility model relates to a power generation system of a fast-starting peak-shaving steam turbine.
Background
The peak of solar power generation often does not correspond to the peak of electricity usage, i.e., the peak period of solar power generation is typically not the period of the peak of electricity usage for the grid user. Therefore, a backup power generation device is required to be capable of rapidly responding to the power demand in the period of the power consumption peak, rapidly providing electric energy to the power grid in the power consumption peak, and supplementing the gap of the power supply in the period of the power consumption peak. The reliable method for quickly supplementing the power supply gap in the electricity utilization peak period still depends on thermal power generation, so that the existing thermal power boiler needs to be changed into a form capable of quickly responding to the electricity utilization gap to operate, namely, the thermal power turbine power generation system does not generate electricity at all in the solar power generation peak period, and the thermal power turbine power generation system can quickly respond in the electricity utilization peak period and immediately start generating electricity.
However, the existing thermal power turbine usually needs 2-3 days to start full power generation from a stop state, wherein the rotor of the turbine is started to rotate by using a jigger device, low-temperature steam is firstly input at an initial stage, then the temperature is gradually increased, higher-temperature steam is input, and the high-pressure cylinder, the medium-pressure cylinder and the low-pressure cylinder of the turbine are preheated from low to high, if the temperature is not slowly increased, the turbine is damaged and scrapped due to uneven thermal expansion, and thus, great loss is caused.
In order to prevent major electrical accidents, existing thermal turbines cannot be operated for a long time below the minimum power specified by the plant design.
In the original electric power industry department issued "electric safety working procedure" electric peace [1994]227, the original electric power industry department issued "300 MW level steam turbine operation guide rule" DL/t 609-1996, "twenty-five key requirements for preventing major accidents of electric power production" there are the following provisions:
2) The idle load operation time is allowed to be no more than 15 minutes after the turbine is thrown.
6) The turbine allows peak shaving loads between the minimum power provided by the manufacturing plant and the rated power and can adapt to load shedding requirements.
An important reason for allowing the idle load operation time to be no longer than 15 minutes after the load is thrown out of the steam turbine is that a large thermal power boiler which supplies steam to the steam turbine cannot maintain the reduced steam output below the minimum design output for a long time so as to match the condition that the steam consumption of the steam turbine is reduced to be too low, which causes serious accidents to occur in the large thermal power boiler which is in operation.
This can result in the coal-fired power generation boiler not functioning properly because the turbine cannot run for more than 15 minutes at a minimum load below the design of the plant. In order to realize carbon emission reduction, in order to more fully utilize solar power generation, the ideal condition is that the steam turbine can be in a thermal state standby state in a non-power generation or micro-power generation state, and once the power grid is needed, the steam turbine can be quickly responded and started in a thermal state to immediately enter a power generation state.
Disclosure of utility model
The utility model aims to provide a rapid start peak-shaving turbine power generation system which enables a turbine to be in a thermal state standby state in a non-power generation or micro-power generation state, and can respond and start the turbine in a thermal state for a plurality of times once power is available or power is cut off within 24 hours a day, so that the turbine can immediately enter a normal power generation state or exit the normal power generation state for a plurality of times.
The utility model relates to a rapid start peak regulation turbine power generation system, which comprises a turbine, a boiler and a low-pressure cylinder, wherein the turbine comprises a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder, the boiler can produce steam for driving the turbine to generate power with load, the low-pressure cylinder maintains a temperature steam generator, and the low-pressure cylinder maintains a temperature steam generator is used for producing low-pressure cylinder maintains a temperature steam which is the same as or close to the temperature of the steam used for the low-pressure cylinder power generation of the turbine;
The low pressure cylinder maintaining temperature steam generator conveys low pressure cylinder maintaining temperature steam into the low pressure cylinder of the steam turbine through a steam inlet of the low pressure cylinder, and the low pressure cylinder maintaining temperature steam flows out from a steam outlet of the low pressure cylinder.
Preferably, the low-pressure cylinder maintaining temperature steam exhausted from the steam outlet of the low-pressure cylinder of the steam turbine is conveyed to a middle-high pressure maintaining temperature steam generator and/or a steam inlet of the low-pressure cylinder maintaining temperature steam generator through a low-pressure steam pipeline connected with a stop valve in series, and the maintaining temperature steam generator is used for producing high-pressure cylinder maintaining temperature steam and middle-pressure cylinder maintaining temperature steam which are the same as or close to the steam temperature used for power generation of the high-pressure cylinder and the middle-pressure cylinder of the steam turbine;
the medium-high pressure maintaining temperature steam generator conveys high-pressure cylinder maintaining temperature steam into the high-pressure cylinder of the steam turbine through a high-pressure maintaining temperature pipeline connected with a stop valve in series via a steam inlet of the high-pressure cylinder, and the high-pressure cylinder maintaining temperature steam flows out from a steam outlet of the high-pressure cylinder;
The medium-high pressure maintaining temperature steam generator conveys medium-pressure cylinder maintaining temperature steam into the medium-pressure cylinder of the steam turbine through a medium-pressure maintaining temperature pipeline connected with a stop valve in series via a steam inlet of the medium-pressure cylinder, and the medium-pressure cylinder maintaining temperature steam flows out from a steam outlet of the medium-pressure cylinder.
Preferably, the medium pressure cylinder maintaining temperature steam discharged from the steam outlet of the medium pressure cylinder of the steam turbine is conveyed to the steam inlet of the medium pressure and high pressure maintaining temperature steam generator through a medium pressure cylinder steam backflow pipeline, and the high pressure cylinder maintaining temperature steam discharged from the steam outlet of the high pressure cylinder of the steam turbine is conveyed to the steam inlet of the medium pressure and high pressure maintaining temperature steam generator through a high pressure cylinder steam backflow pipeline.
Preferably, a high-pressure cylinder steam extraction port is arranged on the cylinder body of the high-pressure cylinder, a high-pressure cylinder body temperature sensor for detecting the temperature in the cylinder body at the high-pressure cylinder steam extraction port is arranged at the high-pressure cylinder steam extraction port, and the high-pressure cylinder steam extraction port is connected with a steam outlet of the high-pressure cylinder maintenance temperature steam generator or the medium-pressure cylinder maintenance temperature steam generator through a steam conveying pipeline which is connected with a stop valve and a temperature and pressure reducer in series.
Preferably, a medium pressure cylinder steam extraction port is arranged on the cylinder body of the medium pressure cylinder, a medium pressure cylinder body temperature sensor for monitoring the temperature in the cylinder body at the medium pressure cylinder steam extraction port is arranged at the medium pressure cylinder steam extraction port, and the medium pressure cylinder steam extraction port is connected with the high pressure cylinder maintenance temperature steam generator or the steam outlet of the medium pressure cylinder maintenance temperature steam generator through a steam conveying pipeline connected with a valve and a temperature and pressure reducer in series.
Preferably, a low-pressure cylinder steam extraction port is arranged on the cylinder body of the low-pressure cylinder, a low-pressure cylinder body temperature sensor for monitoring the temperature in the cylinder body at the low-pressure cylinder steam extraction port is arranged at the low-pressure cylinder steam extraction port, and the low-pressure cylinder steam extraction port is connected with a water mist steam inlet of a low-pressure cylinder maintenance temperature steam generator through a water mist conveying pipeline connected with a valve in series.
Preferably, the high-pressure cylinder maintaining temperature steam generator and the medium-pressure cylinder maintaining temperature steam generator are devices for producing steam by electric heating or devices or steam boilers for producing steam by fused salt heat exchange heating.
When the rapid start peak regulation turbine power generation system is used, after the boiler stops producing steam for driving the turbine to generate power with load, namely after the combustion system of the boiler stops generating power, the low-pressure cylinder maintenance temperature steam generator conveys low-pressure cylinder maintenance temperature steam into the low-pressure cylinder of the turbine through the steam inlet of the low-pressure cylinder, the low-pressure cylinder maintenance temperature steam flows out from the steam outlet of the low-pressure cylinder, the temperature at the steam inlet of the low-pressure cylinder of the turbine is maintained near the temperature of the turbine in the power generation state with load through adjusting the flow rate and/or the pressure of the low-pressure cylinder maintenance temperature steam flowing into the low-pressure cylinder, the temperature at the steam outlet of the low-pressure cylinder of the turbine is maintained near the temperature of the turbine in the power generation state with load, and the rotor of the turbine is maintained near the rotating speed of the turbine in the power generation state with load. When the steam turbine needs to restore the on-load power generation operation state, on-load power generation steam from the boiler can be quickly switched and conveyed to the low-pressure cylinder of the steam turbine, so that the low-pressure cylinder of the steam turbine enters the on-load power generation operation state, and the low-pressure cylinder maintaining temperature steam generator stops outputting the low-pressure cylinder maintaining temperature steam. Therefore, the power generation system of the fast-starting peak-shaving turbine has the advantages that the turbine can be in a thermal state standby state in a non-power generation or micro-power generation state, even within 24 hours a day, once the power grid is powered on or powered off, the turbine can be fast responded and started in a thermal state for multiple times, and the turbine can immediately enter a normal power generation state or can immediately exit the normal power generation state for multiple times.
Other details and features of the rapid start peak shaver turbine power generation system of the present utility model will become apparent upon review of the embodiments described in detail below in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of one embodiment of a rapid start peak shaver turbine power generation system of the present utility model.
Detailed Description
In order to obtain higher thermoelectric conversion efficiency, a dynamic sealing gap of a rotor of a steam turbine is strictly controlled, a large amount of steam is leaked because of the large dynamic sealing gap, and the steam flows out of a high-pressure cylinder 3, a medium-pressure cylinder 4 and a low-pressure cylinder 5 through the dynamic sealing gap without acting, so that the thermoelectric conversion efficiency of the steam turbine is reduced. Therefore, the turbine rotor in the power generation running state should rotate as stably and without jumping as possible, so that the dynamic sealing gap of the turbine rotor can be designed and arranged very small, for example, only 0.001mm, the rotating speed of the turbine rotor also needs to meet the power transmission requirement of the power grid, that is, the generated alternating current needs to meet the frequency of the alternating current transmitted by the power grid in China, and therefore, the rotating speed of the turbine rotor used in a large-scale thermal power plant is locked at 3000 revolutions per minute, and the rotating speed of the turbine rotor cannot be changed and deviated at will.
If the rotating speed of the turbine rotor is started from rest and gradually increased to 3000 rpm, the rotating speed of the turbine rotor is required to pass through the rotating shaft resonance areas of the two turbine rotors, and under the rotating speed of the two rotating shaft resonance areas of the turbine rotor, the radial runout of the turbine rotor is rapidly increased due to resonance of the rotating shaft, so that the abrasion of dynamic sealing of the turbine rotor is increased. Therefore, it is preferable that the rotor of the steam turbine used in the large-scale thermal power plant is not repeatedly stopped and then restarted, and such a change of stopping and restarting the rotor of the steam turbine requires a long time to complete.
The steam turbine that large-scale thermal power factory used is bulky, and when the thermal expansion and shrinkage influences, can cause apparent dimensional change to the dynamic seal of steam turbine rotor, consequently, the steam turbine that large-scale thermal power factory used need utilize the steam of temperature basic invariable to generate electricity, and the steam temperature that generates electricity can not have big skew to avoid causing the damage of the dynamic seal of steam turbine rotor, and then lead to the steam turbine unable normal operating.
According to the technical scheme, the temperature of the steam turbine in the shutdown state is locked by inputting steam with the set temperature into the steam turbine, so that the large-size steam turbine used in the large-size steam power plant can not be adversely affected by thermal expansion and contraction, namely, the dynamic seal of the steam turbine rotor does not generate electricity, and the steam turbine can be quickly switched to the power generation state, and the dynamic seal of the steam turbine rotor cannot be damaged, namely, the steam turbine cannot be normally operated when the steam turbine is quickly switched to the power generation state. Meanwhile, the rotating speed of the turbine rotor in the non-power generation state is maintained at the rotating speed of the power generation operation, so that various problems caused by restarting the turbine rotor are avoided, and when the turbine needs to be rapidly switched to the power generation state, the switching can be completed without changing the rotating speed of the turbine rotor, and therefore the turbine can be rapidly switched to the power generation state.
As shown in fig. 1, the rapid start peak shaving turbine power generation system of the utility model comprises a turbine 1 and a boiler 2, wherein the turbine 1 comprises a high-pressure cylinder 3, a medium-pressure cylinder 4 and a low-pressure cylinder 5, the boiler 2 can produce steam for driving the turbine 1 to generate power with load, and the rapid start peak shaving turbine power generation system also comprises a low-pressure cylinder maintenance temperature steam generator 20, and the low-pressure cylinder maintenance temperature steam generator 20 is used for producing low-pressure cylinder maintenance temperature steam with the same or similar temperature as the steam used for generating power by the low-pressure cylinder 5 of the turbine 1;
After the boiler 2 stops producing steam for driving the steam turbine 1 to generate electricity with load, namely, after a combustion system of the boiler 2 stops generating electricity, the low-pressure cylinder maintaining temperature steam generator 20 conveys low-pressure cylinder maintaining temperature steam into the low-pressure cylinder 5 of the steam turbine 1 through a steam inlet of the low-pressure cylinder 5, the low-pressure cylinder maintaining temperature steam flows out from a steam outlet of the low-pressure cylinder 5, the temperature at the steam inlet of the low-pressure cylinder 5 of the steam turbine 1 is maintained near the temperature of the steam turbine 1 in the generating state with load by adjusting the flow rate and/or the pressure of the low-pressure cylinder maintaining temperature steam flowing into the low-pressure cylinder 5, the temperature at the steam outlet of the low-pressure cylinder 5 of the steam turbine 1 is maintained near the temperature of the steam turbine 1 in the generating state with load, and the rotor of the steam turbine 1 is maintained near the rotating speed of the steam turbine 1 in the generating state with load;
The temperature at the steam inlet of the low pressure cylinder 5 of the turbine 1 for load power generation is usually 300 ℃, the temperature at the steam outlet of the low pressure cylinder 5 of the turbine 1 for load power generation is usually 35 ℃, the low pressure cylinder maintaining temperature steam via the temperature-reducing pressure reducer 15 is used to maintain this temperature state of the turbine 1, if the temperature at the steam inlet of the low pressure cylinder 5 of the turbine 1 cannot be maintained around 300 ℃, and the temperature at the steam outlet of the low pressure cylinder 5 of the turbine 1 cannot be maintained around 35 ℃, the mass of the low pressure cylinder maintaining temperature steam can be preferentially adjusted, such as the amount of the input steam mass is increased or decreased, thereby maintaining the temperature around the above temperature, and if the amount of the adjusted steam mass cannot reach the target, the pressure of the low pressure cylinder maintaining temperature steam can be adjusted, thereby realizing the temperature at the steam inlet of the low pressure cylinder 5 of the turbine 1 at 300 ℃, and the temperature at the steam outlet of the low pressure cylinder 5 of the turbine 1 at 35 ℃.
When the steam turbine 1 needs to recover the on-load power generation operation state, the on-load power generation steam from the boiler 2 can be quickly switched and conveyed to the low-pressure cylinder 5 of the steam turbine 1, so that the low-pressure cylinder 5 of the steam turbine 1 enters the on-load power generation operation state, and the low-pressure cylinder maintenance temperature steam generator 20 stops outputting the low-pressure cylinder maintenance temperature steam.
The stop of the power generation operation of the combustion system of the boiler 2 means that the steam-water system, the coal dust preparation and the combustion system stop the power generation operation, namely, the coal mill, the powder feeding fan in the coal dust preparation and the combustion system of the boiler 2 are in a non-operation state, the burner of the boiler 2 is in a closed state, the dust remover and the desulfurization device of the boiler 2 are in a stop operation state, the induced draft fan for leading out the smoke in the hearth of the boiler 2 is in a stop state, the blower for blowing the air to the hearth through the air preheater of the boiler 2 is in a stop state, the chimney of the boiler 2 is in a state of stopping exhausting smoke outwards, and the steam in the steam drum, the water-cooled wall, the superheater, the reheater and the economizer of the boiler 2 is kept in the steam-water system as not to flow out as much as possible, and the steam is kept near the temperature during the original power generation operation.
As a further improvement of the utility model, the low pressure cylinder maintaining temperature steam discharged from the steam outlet of the low pressure cylinder 5 of the steam turbine 1 is conveyed to the steam inlet of the medium and high pressure maintaining temperature steam generator 10 and/or the low pressure cylinder maintaining temperature steam generator 20 through the low pressure steam pipeline 18 connected with a valve in series, and the maintaining temperature steam generator 10 is used for producing high pressure cylinder maintaining temperature steam and medium pressure cylinder maintaining temperature steam which are the same as or close to the steam temperature used for generating electricity of the high pressure cylinder 3 and the medium pressure cylinder 4 of the steam turbine 1;
After the boiler 2 stops producing steam for driving the steam turbine 1 to generate electricity under load, namely after a combustion system of the boiler 2 stops generating electricity, the medium-high pressure maintenance temperature steam generator 10 conveys high-pressure cylinder maintenance temperature steam into the high-pressure cylinder 3 of the steam turbine 1 through a steam inlet of the high-pressure cylinder 3 by a high-pressure maintenance temperature pipeline 12 connected with a valve in series, the high-pressure cylinder maintenance temperature steam flows out from a steam outlet of the high-pressure cylinder 3, the temperature at the steam inlet of the high-pressure cylinder 3 of the steam turbine 1 is maintained near the temperature of the steam turbine 1 in the generating state under load by adjusting the flow rate and/or the pressure of the high-pressure cylinder maintenance temperature steam flowing into the high-pressure cylinder 3, the temperature at the steam outlet of the high-pressure cylinder 3 of the steam turbine 1 is maintained near the temperature of the steam turbine 1 in the generating state under load, and the rotor of the steam turbine 1 is maintained near the rotating speed of the steam turbine 1 in the generating state under load;
The temperature at the steam inlet of the high-pressure cylinder 3 of the steam turbine 1 for load power generation is usually 550 ℃, the temperature at the steam outlet of the high-pressure cylinder 3 of the steam turbine 1 for load power generation is usually 350 ℃, the high-pressure cylinder maintaining temperature steam produced by the high-pressure cylinder maintaining temperature steam generator 10 is used to maintain this temperature state of the high-pressure cylinder 3, if the temperature at the steam inlet of the high-pressure cylinder 3 of the steam turbine 1 cannot be maintained around 550 ℃, and the temperature at the steam outlet of the high-pressure cylinder 3 of the steam turbine 1 cannot be maintained around 350 ℃, the high-pressure cylinder maintaining temperature steam quality produced by the high-pressure cylinder maintaining temperature steam generator 10 can be preferentially adjusted, such as by increasing or decreasing the amount of the input steam quality, thereby maintaining the temperature around the above-mentioned temperature, and if the amount of the adjusted steam quality cannot reach the destination, the pressure of the high-pressure cylinder maintaining temperature steam can be adjusted, thereby realizing that the temperature at the steam inlet of the high-pressure cylinder 3 of the high-pressure cylinder 1 is 550 ℃, and the temperature at the steam outlet of the high-pressure cylinder 3 of the steam turbine 1 is 350 ℃.
After the boiler 2 stops producing steam for driving the steam turbine 1 to generate electricity under load, namely, after a combustion system of the boiler 2 stops generating electricity, the medium-high pressure maintenance temperature steam generator 10 conveys medium-pressure cylinder maintenance temperature steam into the medium-pressure cylinder 4 of the steam turbine 1 through a steam inlet of the medium-pressure cylinder 4 by a medium-pressure maintenance temperature pipeline 13 connected with a valve in series, the medium-pressure cylinder maintenance temperature steam flows out from a steam outlet of the medium-pressure cylinder 4, the temperature at the steam inlet of the medium-pressure cylinder 4 of the steam turbine 1 is maintained near the temperature of the steam turbine 1 in the generating state under load by adjusting the flow rate and/or the pressure of the medium-pressure cylinder maintenance temperature steam flowing into the medium-pressure cylinder 4, the temperature at the steam outlet of the medium-pressure cylinder 4 of the steam turbine 1 is maintained near the temperature of the steam turbine 1 in the generating state under load, and the rotor of the steam turbine 1 is maintained near the rotating speed of the steam turbine 1 in the generating state under load;
The temperature at the steam inlet of the intermediate pressure cylinder 4 of the steam turbine 1 for load power generation is usually 550 ℃, the temperature at the steam outlet of the intermediate pressure cylinder 4 of the steam turbine 1 for load power generation is usually 300 ℃, the intermediate pressure cylinder maintaining temperature steam produced by the high pressure cylinder maintaining temperature steam generator 10 is used to maintain this temperature state of the intermediate pressure cylinder 4, if the temperature at the steam inlet of the intermediate pressure cylinder 4 of the steam turbine 1 cannot be maintained around 550 ℃, and the temperature at the steam outlet of the intermediate pressure cylinder 4 of the steam turbine 1 cannot be maintained around 300 ℃, the intermediate pressure cylinder maintaining temperature steam quality produced by the high pressure cylinder maintaining temperature steam generator 10 can be preferentially adjusted, such as by increasing or decreasing the amount of the input steam quality, thereby maintaining the temperature around the above temperature, and if the amount of the adjusted steam quality cannot reach the destination, the pressure of the intermediate pressure cylinder maintaining temperature steam can be adjusted, thereby realizing that the temperature at the steam inlet of the intermediate pressure cylinder 4 of the steam turbine 1 is 550 ℃, and the temperature at the steam outlet of the intermediate pressure cylinder 4 of the steam turbine 1 is 300 ℃.
When the steam turbine 1 needs to be restored to the on-load power generation operation state, on-load power generation steam from the boiler 2 is conveyed to the high-pressure cylinder 3 and the medium-pressure cylinder 4 of the steam turbine 1, and the high-pressure cylinder 3 and the medium-pressure cylinder 4 of the steam turbine 1 are brought into the on-load power generation operation state.
As a further improvement of the present utility model, the intermediate pressure cylinder maintaining temperature steam discharged from the steam outlet of the intermediate pressure cylinder 4 of the steam turbine 1 is delivered to the steam inlet of the intermediate pressure maintaining temperature steam generator 10 through the intermediate pressure cylinder steam return pipe 14, and the high pressure cylinder maintaining temperature steam discharged from the steam outlet of the high pressure cylinder 3 of the steam turbine 1 is delivered to the steam inlet of the intermediate pressure maintaining temperature steam generator 10 through the high pressure cylinder steam return pipe 17.
As a further improvement of the utility model, the cylinder body of the high pressure cylinder 3 is provided with a high pressure cylinder steam extraction port 6, a high pressure cylinder body temperature sensor for monitoring the temperature in the cylinder body at the high pressure cylinder steam extraction port 6 is arranged at the high pressure cylinder steam extraction port 6, and the high pressure cylinder steam extraction port 6 is connected with a steam outlet of the high pressure cylinder maintenance temperature steam generator 10 or the medium pressure cylinder maintenance temperature steam generator 11 through a steam conveying pipeline which is connected with a valve and a temperature and pressure reducer in series.
In use, if the high-pressure cylinder maintaining temperature steam produced by the high-pressure cylinder maintaining temperature steam generator 10 is only input from the steam inlet of the high-pressure cylinder 3 of the steam turbine 1, and the temperature at the steam inlet of the high-pressure cylinder 3 of the steam turbine 1 cannot be maintained near the temperature at which the steam turbine 1 is in the power generation state, and the temperature at the steam outlet of the high-pressure cylinder 3 of the steam turbine 1 cannot be maintained near the temperature at which the steam turbine 1 is in the power generation state, it is necessary to adjust the temperature of the relevant part by inputting or extracting steam through the high-pressure cylinder extraction port 6 on the cylinder body of the high-pressure cylinder 3, thereby achieving the purpose of maintaining the temperature at the steam inlet of the high-pressure cylinder 3 of the steam turbine 1 near the temperature at which the steam turbine 1 is in the power generation state, and maintaining the temperature at the steam outlet of the high-pressure cylinder 3 of the steam turbine 1 near the temperature at which the steam turbine 1 is in the power generation state.
If steam is fed from the high-pressure cylinder steam extraction port 6, the temperature of the fed steam is adjusted by a temperature and pressure reducer to be consistent with or close to the temperature of the high-pressure cylinder steam extraction port 6 in the power generation state of the steam turbine 1.
As a further improvement of the utility model, the cylinder body of the medium pressure cylinder 4 is provided with a medium pressure cylinder steam extraction port 7, a medium pressure cylinder body temperature sensor for monitoring the temperature in the cylinder body at the medium pressure cylinder steam extraction port 7 is arranged at the medium pressure cylinder steam extraction port 7, and the medium pressure cylinder steam extraction port 7 is connected with a steam outlet of the high pressure cylinder maintenance temperature steam generator 10 or the medium pressure cylinder maintenance temperature steam generator 11 through a steam conveying pipeline connected with a stop valve and a temperature and pressure reducer in series.
In use, if the high-pressure cylinder maintaining temperature steam produced by the medium-pressure cylinder high-pressure cylinder maintaining temperature steam generator 11 is only input from the steam inlet of the medium-pressure cylinder 4 of the steam turbine 1, and the temperature at the steam inlet of the medium-pressure cylinder 4 of the steam turbine 1 cannot be maintained near the temperature at which the steam turbine 1 is in the power generation state by the regulating and heat preserving method of flowing out from the steam outlet of the medium-pressure cylinder 4 of the steam turbine 1, the temperature at the steam outlet of the medium-pressure cylinder 4 of the steam turbine 1 is maintained near the temperature at which the steam turbine 1 is in the power generation state, and the temperature at the steam outlet of the medium-pressure cylinder 4 of the steam turbine 1 is maintained near the temperature at which the steam turbine 1 is in the power generation state, it is necessary to regulate the temperature at the relevant part by inputting or extracting steam through the medium-pressure cylinder steam extraction port 7 on the cylinder body of the medium-pressure cylinder 4, thereby achieving the purpose of maintaining the temperature at the steam inlet of the medium-pressure cylinder 4 of the steam turbine 1 near the temperature at the steam outlet of the steam turbine 1 is in the power generation state.
If steam is fed from the intermediate pressure cylinder steam extraction port 7, the temperature of the fed steam is adjusted by a temperature and pressure reducer to be consistent with or close to the temperature at the intermediate pressure cylinder steam extraction port 7 in the power generation state of the steam turbine 1.
As a further improvement of the utility model, the cylinder body of the low pressure cylinder 5 is provided with a low pressure cylinder steam extraction port 8, the low pressure cylinder steam extraction port 8 is provided with a low pressure cylinder body temperature sensor for monitoring the temperature in the cylinder body at the low pressure cylinder steam extraction port 8, and the low pressure cylinder steam extraction port 8 is connected with a water mist steam inlet of the low pressure cylinder maintenance temperature steam generator 20 through a water mist conveying pipeline 9 connected with a stop valve in series.
In use, if the low pressure cylinder maintaining temperature steam is only input from the steam inlet of the low pressure cylinder 5 of the steam turbine 1, and the temperature at the steam inlet of the low pressure cylinder 5 of the steam turbine 1 cannot be maintained near the temperature at which the steam turbine 1 is in the power generation state by the regulating and heat preserving method of flowing out from the steam outlet of the low pressure cylinder 5 of the steam turbine 1, and the temperature at the steam outlet of the low pressure cylinder 5 of the steam turbine 1 is maintained near the temperature at which the steam turbine 1 is in the power generation state, it is necessary to regulate the temperature of the relevant part by inputting or extracting steam through the low pressure cylinder extraction port 8 on the cylinder body of the low pressure cylinder 5, thereby achieving the purpose of maintaining the temperature at the steam inlet of the low pressure cylinder 5 of the steam turbine 1 near the temperature at which the steam turbine 1 is in the power generation state and the temperature at the steam outlet of the low pressure cylinder 5 of the steam turbine 1 near the temperature at which the steam turbine 1 is in the power generation state.
If steam is fed from the low pressure cylinder steam extraction port 8, the temperature of the fed steam is identical to or close to the temperature of the low pressure cylinder steam extraction port 8 in the power generation state of the steam turbine 1.
As a further improvement of the utility model, the temperature at the steam inlet of the high-pressure cylinder 3 of the steam turbine 1 during the load power generation is 500 ℃ to 650 ℃, the temperature at the steam outlet of the high-pressure cylinder 3 of the steam turbine 1 during the load power generation is 400 ℃ to 300 ℃, the temperature at the steam inlet of the medium-pressure cylinder 4 of the steam turbine 1 during the load power generation is 500 ℃ to 650 ℃, the temperature at the steam outlet of the medium-pressure cylinder 4 of the steam turbine 1 during the load power generation is 400 ℃ to 300 ℃, the temperature at the steam inlet of the low-pressure cylinder 5 of the steam turbine 1 during the load power generation is 350 ℃ to 250 ℃, and the temperature at the steam outlet of the low-pressure cylinder 5 of the steam turbine 1 during the load power generation is 40 ℃ to 30 ℃.
As a further improvement of the present utility model, the temperature at the steam inlet of the high pressure cylinder 3 of the turbine 1 at the time of load power generation is 550 ℃, the temperature at the steam outlet of the high pressure cylinder 3 of the turbine 1 at the time of load power generation is 350 ℃, the temperature at the steam inlet of the medium pressure cylinder 4 of the turbine 1 at the time of load power generation is 550 ℃, the temperature at the steam outlet of the medium pressure cylinder 4 of the turbine 1 at the time of load power generation is 300 ℃, the temperature at the steam inlet of the low pressure cylinder 5 of the turbine 1 at the time of load power generation is 300 ℃, and the temperature at the steam outlet of the low pressure cylinder 5 of the turbine 1 at the time of load power generation is 35 ℃;
As a further improvement of the present utility model, the above-described high-pressure cylinder maintaining temperature steam generator 10 and medium-pressure cylinder maintaining temperature steam generator 11 are devices for producing steam by electric heating or devices for producing steam by molten salt heat exchange heating or steam boilers.
When the rapid start peak regulation turbine power generation system is used, after the boiler 2 stops producing steam for driving the turbine 1 to generate power with load, namely after the combustion system of the boiler 2 stops generating power, the low pressure cylinder maintaining temperature steam generator 20 conveys low pressure cylinder maintaining temperature steam into the low pressure cylinder 5 of the turbine 1 through the steam inlet of the low pressure cylinder 5, the low pressure cylinder maintaining temperature steam flows out from the steam outlet of the low pressure cylinder 5, the temperature at the steam inlet of the low pressure cylinder 5 of the turbine 1 is maintained near the temperature of the turbine 1 in the power generation state with load by adjusting the flow rate and/or the pressure of the low pressure cylinder maintaining temperature steam flowing into the low pressure cylinder 5, the temperature at the steam outlet of the low pressure cylinder 5 of the turbine 1 is maintained near the temperature of the turbine 1 in the power generation state with load, and the rotor of the turbine 1 is maintained near the rotating speed of the turbine 1 in the power generation state with load. When the steam turbine 1 needs to recover the on-load power generation operation state, the on-load power generation steam from the boiler 2 can be quickly switched and conveyed to the low-pressure cylinder 5 of the steam turbine 1, so that the low-pressure cylinder 5 of the steam turbine 1 enters the on-load power generation operation state, and the low-pressure cylinder maintenance temperature steam generator 20 stops outputting the low-pressure cylinder maintenance temperature steam. Therefore, the rapid start peak regulation turbine power generation system has the advantages that the turbine can be in a thermal state standby state in a non-power generation or micro-power generation state, once the power grid is needed for power utilization, even within 24 hours a day, once the power grid is needed for power utilization or power failure, the turbine can be rapidly responded and started in a thermal state for multiple times, the turbine can immediately enter a normal power generation state, or the turbine can immediately exit the normal power generation state for multiple times.
Claims (7)
1. The rapid start peak regulation turbine power generation system comprises a turbine (1) and a boiler (2), wherein the turbine (1) comprises a high-pressure cylinder (3), a medium-pressure cylinder (4) and a low-pressure cylinder (5), and the boiler (2) can produce steam for driving the turbine (1) to generate power under load, and is characterized by further comprising a low-pressure cylinder maintenance temperature steam generator (20), wherein the low-pressure cylinder maintenance temperature steam generator (20) is used for producing low-pressure cylinder maintenance temperature steam with the same or close to the temperature of the steam for generating power by the low-pressure cylinder (5) of the turbine (1);
The low-pressure cylinder maintaining temperature steam generator (20) conveys low-pressure cylinder maintaining temperature steam into the low-pressure cylinder (5) of the steam turbine (1) through a steam inlet of the low-pressure cylinder (5), and the low-pressure cylinder maintaining temperature steam flows out from a steam outlet of the low-pressure cylinder (5).
2. The rapid start peak shaver turbine power generation system according to claim 1, characterized in that low pressure cylinder maintenance temperature steam discharged from a steam outlet of a low pressure cylinder (5) of the turbine (1) is conveyed to a steam inlet of a medium and high pressure maintenance temperature steam generator (10) and/or a low pressure cylinder maintenance temperature steam generator (20) through a low pressure steam pipeline (18) connected in series with a shut-off valve, the maintenance temperature steam generator (10) is used for producing high pressure cylinder maintenance temperature steam and medium pressure cylinder maintenance temperature steam which are the same as or close to the steam temperature used for power generation of a high pressure cylinder (3) and a medium pressure cylinder (4) of the turbine (1);
The medium-high pressure maintaining temperature steam generator (10) conveys high-pressure cylinder maintaining temperature steam into the high-pressure cylinder (3) of the steam turbine (1) through a high-pressure maintaining temperature pipeline (12) connected with a stop valve in series by a steam inlet of the high-pressure cylinder (3), and the high-pressure cylinder maintaining temperature steam flows out from a steam outlet of the high-pressure cylinder (3);
The medium-high pressure maintaining temperature steam generator (10) conveys medium-pressure cylinder maintaining temperature steam into the medium-pressure cylinder (4) of the steam turbine (1) through a steam inlet of the medium-pressure cylinder (4) by a medium-pressure maintaining temperature pipeline (13) connected with a stop valve in series, and the medium-pressure cylinder maintaining temperature steam flows out from a steam outlet of the medium-pressure cylinder (4).
3. The rapid start peak shaver turbine power generation system according to claim 2, wherein the medium pressure cylinder maintaining temperature steam discharged from the steam outlet of the medium pressure cylinder (4) of the turbine (1) is conveyed to the steam inlet of the medium pressure maintaining temperature steam generator (10) through the medium pressure cylinder steam reflux pipe (14), and the high pressure cylinder maintaining temperature steam discharged from the steam outlet of the high pressure cylinder (3) of the turbine (1) is conveyed to the steam inlet of the medium pressure maintaining temperature steam generator (10) through the high pressure cylinder steam reflux pipe (17).
4. The rapid start peak shaving turbine power generation system according to claim 3, wherein a high pressure cylinder steam extraction port (6) is arranged on a cylinder body of the high pressure cylinder (3), a high pressure cylinder body temperature sensor for monitoring the temperature in the cylinder body at the high pressure cylinder steam extraction port (6) is arranged at the high pressure cylinder steam extraction port (6), and the high pressure cylinder steam extraction port (6) is connected with a steam outlet of the high pressure cylinder maintenance temperature steam generator (10) or the medium pressure cylinder maintenance temperature steam generator (11) through a steam conveying pipeline connected with a valve and a temperature reducing pressure reducer in series.
5. The rapid start peak shaving turbine power generation system according to claim 4, wherein a middle pressure cylinder steam extraction port (7) is arranged on a cylinder body of the middle pressure cylinder (4), a middle pressure cylinder body temperature sensor for monitoring the temperature in the cylinder body at the middle pressure cylinder steam extraction port (7) is arranged at the middle pressure cylinder steam extraction port (7), and the middle pressure cylinder steam extraction port (7) is connected with a steam outlet of a high pressure cylinder maintenance temperature steam generator (10) or a middle pressure cylinder maintenance temperature steam generator (11) through a steam conveying pipeline connected with a valve and a temperature and pressure reducer in series.
6. The rapid start peak shaver turbine power generation system according to claim 5, wherein the cylinder body of the low pressure cylinder (5) is provided with a low pressure cylinder steam extraction port (8), the low pressure cylinder steam extraction port (8) is provided with a low pressure cylinder body temperature sensor for monitoring the temperature in the cylinder body at the low pressure cylinder steam extraction port (8), and the low pressure cylinder steam extraction port (8) is connected with a water mist steam inlet of the low pressure cylinder maintenance temperature steam generator (20) through a water mist conveying pipeline (9) connected with a valve in series.
7. The rapid start peak shaver turbine power generation system according to any one of claims 1 to 6, characterized in that the high-pressure cylinder maintaining temperature steam generator (10) and the medium-pressure cylinder maintaining temperature steam generator (11) are devices for producing steam by electric heating or devices or steam boilers for producing steam by molten salt heat exchange heating.
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| CN202322335715.XU CN221002880U (en) | 2023-08-29 | 2023-08-29 | Quick start peak regulation turbine power generation system |
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