CN221032779U - Quick peak regulating steam turbine power generation system - Google Patents
Quick peak regulating steam turbine power generation system Download PDFInfo
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- CN221032779U CN221032779U CN202322332994.4U CN202322332994U CN221032779U CN 221032779 U CN221032779 U CN 221032779U CN 202322332994 U CN202322332994 U CN 202322332994U CN 221032779 U CN221032779 U CN 221032779U
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Abstract
The rapid peak regulating 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, and the rapid peak regulating turbine power generation system also comprises a high-pressure cylinder maintenance temperature steam generator, wherein the high-pressure cylinder maintenance temperature steam generator is used for producing high-pressure cylinder maintenance temperature steam with the same or similar temperature as the steam used for the high-pressure cylinder power generation of the turbine; the high-pressure cylinder maintaining temperature steam generator conveys high-pressure cylinder maintaining temperature steam into the high-pressure cylinder of the steam turbine through 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 rapid peak regulating turbine power generation system has the advantages that the turbine can be in thermal state standby in the non-power generation or micro-power generation state, once the power grid is required to be used, the turbine can be rapidly responded and started in the thermal state, and the turbine can immediately enter the normal power generation state.
Description
Technical Field
The utility model relates to a rapid peak regulating steam turbine power generation system.
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 peak regulating 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 multiple 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 multiple times.
The utility model relates to a rapid peak regulating steam turbine power generation system, which comprises a steam turbine and a boiler, wherein the steam turbine comprises a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder, the boiler can produce steam for driving the steam turbine to generate power under load, and the rapid peak regulating steam turbine power generation system also comprises a high-pressure cylinder maintenance temperature steam generator, wherein the high-pressure cylinder maintenance temperature steam generator is used for producing high-pressure cylinder maintenance temperature steam which is the same as or close to the temperature of steam used for generating power by the high-pressure cylinder of the steam turbine;
The high-pressure cylinder maintaining temperature steam generator conveys high-pressure cylinder maintaining temperature steam into the high-pressure cylinder of the steam turbine through 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.
Preferably, the medium pressure cylinder maintaining temperature steam is conveyed into the medium pressure cylinder of the steam turbine through a steam inlet of the medium pressure cylinder by a medium pressure cylinder steam conveying pipeline connected with a stop valve in series, and flows out from a steam outlet of the medium pressure cylinder.
Preferably, the low-pressure cylinder maintaining temperature steam is conveyed into the low-pressure cylinder of the steam turbine through a steam inlet of the low-pressure cylinder by a low-pressure cylinder steam conveying pipeline connected with a stop valve in series, and then flows out from a steam outlet of the low-pressure cylinder and enters the condenser.
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 condenser is connected with the high-pressure cylinder maintaining temperature steam generator or the medium-pressure cylinder maintaining temperature steam generator through a condensed water conveying pipeline connected with the valve and the water pump in series, and condensed water in the condenser is conveyed to the high-pressure cylinder maintaining temperature steam generator or the medium-pressure cylinder maintaining temperature steam generator through the condensed water conveying pipeline to be used for preparing steam.
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 peak regulating turbine power generation system is used, after a boiler stops producing steam for driving the turbine to generate power with load, the high-pressure cylinder maintaining temperature steam generator conveys high-pressure cylinder maintaining temperature steam into the high-pressure cylinder of the turbine through the steam inlet of the high-pressure cylinder by the high-pressure cylinder steam conveying pipeline, the high-pressure cylinder maintaining temperature steam flows out from the steam outlet of the high-pressure cylinder, the temperature at the steam inlet of the high-pressure cylinder of the turbine is maintained near the temperature of the turbine in the power generating state with load by regulating the flow and/or pressure of the high-pressure cylinder maintaining temperature steam flowing into the high-pressure cylinder, the temperature at the steam outlet of the high-pressure cylinder of the turbine is maintained near the temperature of the turbine in the power generating state with load, and the rotor of the turbine is maintained near the rotating speed of the turbine in the power generating 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 directly switched and conveyed to the high-pressure cylinder of the steam turbine, so that the high-pressure cylinder of the steam turbine enters the on-load power generation operation state, and the high-pressure cylinder maintaining temperature steam generator stops outputting the high-pressure cylinder maintaining temperature steam. Therefore, the rapid peak regulating 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, even within 24 hours a day, once the power grid is powered on or powered off, the turbine can be rapidly responded for a plurality of times, and can be started in a thermal state, so that the turbine immediately enters a normal power generation state, or the turbine immediately exits the normal power generation state for a plurality of times.
Further details and features of the rapid peaking turbine power generation system of the present utility model will become apparent upon reading the examples detailed below in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of one embodiment of a rapid peaking 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 peak-adjusting steam turbine power generation system comprises a steam turbine 1 and a boiler 2, wherein the steam 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 steam turbine 1 to generate power with load, and the rapid peak-adjusting steam turbine power generation system further comprises a high-pressure cylinder maintenance temperature steam generator 10, and the high-pressure cylinder maintenance temperature steam generator 10 is used for producing high-pressure cylinder maintenance temperature steam with the same or similar temperature as the steam used for generating power by the high-pressure cylinder 3 of the steam 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 high-pressure cylinder 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 steam inlet of the high-pressure cylinder 3, the high-pressure cylinder maintaining 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 with load by adjusting the flow rate and/or the pressure of the high-pressure cylinder maintaining 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 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 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 ℃.
When the steam turbine 1 needs to be restored to the on-load power generation operation state, the on-load power generation steam from the boiler 2 is transmitted to the high-pressure cylinder 3 of the steam turbine 1, the high-pressure cylinder 3 of the steam turbine 1 is put into the on-load power generation operation state, and the high-pressure cylinder maintenance temperature steam generator 10 and the medium-pressure cylinder maintenance temperature steam generator 11 stop outputting the high-pressure cylinder maintenance temperature steam and the medium-pressure cylinder maintenance temperature steam.
The above-mentioned boiler 2 combustion system stops generating operation, means steam-water system, coal dust preparation and combustion system stop generating operation, namely coal mill, the powder feed fan in the coal dust preparation and the combustion system of boiler 2 are in the non-operating condition, the combustor of boiler 2 is in the off-state, dust remover and the desulphurization unit of boiler 2 are in the off-state, be used for the draught fan that draws forth the flue gas in the furnace of boiler 2 in the off-state, the forced draught blower that supplies air to the furnace through the air heater of boiler 2 is in the off-state, the chimney of boiler 2 is in the state of stopping outwards discharging fume, steam in the drum of boiler 2, the water-cooling wall, the superheater, the reheater and the economizer all remains as far as possible in steam-water system and does not flow away, and let steam keep near the temperature when originally generating operation.
As a further improvement of the present utility model, after the boiler 2 stops producing the steam for driving the turbine 1 to generate electricity with load, that is, after the combustion system of the boiler 2 stops generating electricity, the high-pressure cylinder maintaining temperature steam discharged from the steam outlet of the high-pressure cylinder 3 of the turbine 1 is heated to the same or a close temperature as the steam used for generating electricity by the medium-pressure cylinder 4 of the turbine 1 by the medium-pressure cylinder maintaining temperature steam generator 11, then the medium-pressure cylinder maintaining temperature steam is conveyed into the medium-pressure cylinder 4 of the turbine 1 through the steam inlet of the medium-pressure cylinder 4 connected in series with a valve, the medium-pressure cylinder maintaining temperature steam flows out from the steam outlet of the medium-pressure cylinder 4, the temperature at the steam inlet of the medium-pressure cylinder 4 of the turbine 1 is maintained near the temperature at which the turbine 1 is in the load generating state by adjusting the flow rate and/or pressure of the medium-pressure cylinder maintaining temperature steam flowing into the medium-pressure cylinder 4, and the temperature at the steam outlet of the medium-pressure cylinder 4 of the turbine 1 is maintained near the temperature at which the turbine 1 is in the load generating state;
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 recover the on-load power generation operation state, the on-load power generation steam from the boiler 2 can be directly switched and conveyed to the high-pressure cylinder 3 of the steam turbine 1, so that the high-pressure cylinder 3 of the steam turbine 1 enters the on-load power generation operation state, and the high-pressure cylinder maintenance temperature steam generator 10 stops outputting the high-pressure cylinder maintenance temperature steam and the medium-pressure cylinder maintenance temperature steam.
As a further improvement of the utility model, the temperature of the medium pressure cylinder maintaining temperature steam discharged from the steam outlet of the medium pressure cylinder 4 of the steam turbine 1 is regulated to be the same as or close to the temperature of the low pressure cylinder maintaining temperature steam used for generating electricity by the low pressure cylinder 5 of the steam turbine 1 by a temperature and pressure reducer 15, then the low pressure cylinder maintaining temperature steam is conveyed into the low pressure cylinder 5 of the steam turbine 1 through a steam inlet of the low pressure cylinder 5 by a low pressure cylinder steam conveying pipeline 14 connected with a valve in series, and then the low pressure cylinder maintaining temperature steam flows out from the steam outlet of the low pressure cylinder 5 and then enters a condenser 16;
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 on-load power generation state by adjusting the flow rate and/or the pressure of the low-pressure cylinder maintaining temperature steam flowing into the low-pressure cylinder 5, and 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 on-load power generation state;
When the steam turbine 1 needs to recover the on-load power generation operation state, the boiler 2 transmits on-load power generation steam 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.
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 ℃.
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 opening 8, a low pressure cylinder body temperature sensor for monitoring the temperature in the cylinder body at the low pressure cylinder steam extraction opening 8 is arranged at the low pressure cylinder steam extraction opening 8, and the low pressure cylinder steam extraction opening 8 is connected with a water mist steam inlet of a low pressure cylinder maintenance temperature steam generator (not shown in the figure) 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 present utility model, the condenser 16 is connected to the high-pressure cylinder maintaining temperature steam generator 10 or the medium-pressure cylinder maintaining temperature steam generator 11 through a condensate conveying pipeline in which a valve and a water pump are connected in series, and condensate in the condenser 16 is conveyed to the high-pressure cylinder maintaining temperature steam generator 10 or the medium-pressure cylinder maintaining temperature steam generator 11 through the condensate conveying pipeline for producing steam.
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.
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 at the time of the load power generation of the high pressure cylinder 3 of the steam turbine 1 is 550 ℃, the temperature at the steam outlet at the time of the load power generation of the high pressure cylinder 3 of the steam turbine 1 is 350 ℃, the temperature at the steam inlet at the time of the load power generation of the medium pressure cylinder 4 of the steam turbine 1 is 550 ℃, the temperature at the steam outlet at the time of the load power generation of the medium pressure cylinder 4 of the steam turbine 1 is 300 ℃, the temperature at the steam inlet at the time of the load power generation of the low pressure cylinder 5 of the steam turbine 1 is 300 ℃, and the temperature at the steam outlet at the time of the load power generation of the low pressure cylinder 5 of the steam turbine 1 is 35 ℃.
When the rapid peak-adjusting steam turbine power generation system is used, after the boiler 2 stops producing steam for driving the steam turbine 1 to generate power with load, namely after a combustion system of the boiler 2 stops generating power, the high-pressure cylinder 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 connected in series by a high-pressure cylinder steam conveying pipeline 12 with a valve, 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 power generation state with 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 power generation state with load, and the rotor of the steam turbine 1 is maintained near the rotating speed of the steam 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 directly switched and conveyed to the high-pressure cylinder 3 of the steam turbine 1, so that the high-pressure cylinder 3 of the steam turbine 1 enters the on-load power generation operation state, and the high-pressure cylinder maintenance temperature steam generator 10 stops outputting the high-pressure cylinder maintenance temperature steam and the medium-pressure cylinder maintenance temperature steam. Therefore, the rapid peak regulating 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, and 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 (8)
1. The rapid peak regulating steam turbine power generation system comprises a steam turbine (1) and a boiler (2), wherein the steam 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 steam turbine (1) to generate power under load, and is characterized by further comprising a high-pressure cylinder maintenance temperature steam generator (10), wherein the high-pressure cylinder maintenance temperature steam generator (10) is used for producing high-pressure cylinder maintenance temperature steam with the same or similar temperature as the steam used for generating power by the high-pressure cylinder (3) of the steam turbine (1);
The high-pressure cylinder 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 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).
2. The rapid peaking turbine power generation system according to claim 1, characterized in that the intermediate pressure cylinder maintenance temperature steam is delivered into the intermediate pressure cylinder (4) of the turbine (1) via the steam inlet of the intermediate pressure cylinder (4) through the intermediate pressure cylinder steam delivery pipeline (13) with a series-connected valve, and the intermediate pressure cylinder maintenance temperature steam flows out from the steam outlet of the intermediate pressure cylinder (4).
3. The rapid peaking turbine power generation system according to claim 2, characterized in that low pressure cylinder maintenance temperature steam is delivered into the low pressure cylinder (5) of the turbine (1) through the steam inlet of the low pressure cylinder (5) by the low pressure cylinder steam delivery pipeline (14) connected in series with a shutter, and then the low pressure cylinder maintenance temperature steam flows out from the steam outlet of the low pressure cylinder (5) and then enters the condenser (16).
4. The rapid peaking 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 peaking 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 peak-adjusting steam turbine power generation system according to claim 5, wherein a low-pressure cylinder steam extraction port (8) is arranged on a cylinder body of the low-pressure cylinder (5), a low-pressure cylinder body temperature sensor for monitoring the temperature in the cylinder body at the low-pressure cylinder steam extraction port (8) is arranged 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 a low-pressure cylinder maintenance temperature steam generator through a water mist conveying pipeline (9) connected with a valve in series.
7. The rapid peak-adjusting steam turbine power generation system according to claim 6, wherein the condenser (16) is connected with the high-pressure cylinder maintaining temperature steam generator (10) or the medium-pressure cylinder maintaining temperature steam generator (11) through a condensate conveying pipeline connected with a valve and a water pump in series.
8. The rapid peaking turbine power generation system as claimed in claim 7, wherein the high pressure cylinder maintenance temperature steam generator (10) and the medium pressure cylinder maintenance temperature steam generator (11) are devices for producing steam by electric heating or devices for producing steam by molten salt heat exchange or steam boilers.
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| CN202322332994.4U CN221032779U (en) | 2023-08-29 | 2023-08-29 | Quick peak regulating steam turbine power generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322332994.4U CN221032779U (en) | 2023-08-29 | 2023-08-29 | Quick peak regulating steam turbine power generation system |
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| CN221032779U true CN221032779U (en) | 2024-05-28 |
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