CN103758586A - Rapid cooling system of steam turbine - Google Patents
Rapid cooling system of steam turbine Download PDFInfo
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- CN103758586A CN103758586A CN201310643042.2A CN201310643042A CN103758586A CN 103758586 A CN103758586 A CN 103758586A CN 201310643042 A CN201310643042 A CN 201310643042A CN 103758586 A CN103758586 A CN 103758586A
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Abstract
The invention discloses a rapid cooling system of a steam turbine. The rapid cooling system comprises an air compressor for providing compressed air, an oil-water separator, an air heater and an air collecting tank which are sequentially connected by a pipeline that is used for delivering cooling air, as well as an electric control cabinet for controlling the devices, wherein a secondary heater is arranged between the air heater and the air collecting tank, a first valve is arranged between the air heater and the secondary heater, second valves are arranged at two ends of the air heater and the first valve in parallel, and a pipeline which is connected with the air collecting tank by a third valve is arranged between the air heater and the first valve. The rapid cooling system of the steam turbine has the advantages that: 1, the problem of the thermal shock of the fair-current cooling on the steam turbine is solved and the cooling effect is excellent, and the temperature of the cooling air can be regulated in accordance with the temperature of the steam turbine; 2, the hot air can be adopted to pre-heat the steam turbine when the steam turbine is started; 3, the dry air can be used for dehumidifying the steam turbine when the steam turbine is stopped and under the standby state; 4, the cooling system device can be in common use with steam turbines of various models, so that the commonality is good.
Description
Technical field
The present invention relates to a kind of accelerate cooling system, particularly a kind of steam turbine accelerate cooling system.
Background technique
Vane type rotary prime mover that steam turbine is is mechanical energy by the thermal power transfer of steam, mainly as prime mover of generating use.Because current steam turbine generally adopts the high-quality thermal insulating materials such as calcium silicate, alumina silicate, its thermal insulation property, Safety performance has all obtained very large improvement, but has but greatly increased the wait cool time of overhaul of steam turbine, and single-machine capacity is larger, and its contradiction is more outstanding.At present generally adopt the cooling method of forced ventilation to carry out the cylinder of steam turbine cooling, steam turbine accelerates height, the intermediate cylinder that cooling main object is steam turbine.
According to the similarities and differences of cooling-air and working steam flow direction, can be divided into two kinds of adverse current and following currents.Following current cooling-air is introduced from high-temperature zone, and heat transfer temperature difference is large, than adverse current is cooling, has a large thermal shock risk.But owing to being full admission, more even to rotor, cylinder cooling raio, air inlet area had metal temperature to monitor that measuring point can add utilization originally, was convenient to monitoring and controlling cooling rate.Although the cooling import heat transfer temperature difference of adverse current is little, at steam turbine, when hot stage is cooling, be subject to the risk of thermal shock cooling less than following current, but because not thering is the cooling uniformity advantage of following current and air inlet area, without ready-made other metal temperature, monitor measuring point, be therefore not easy to monitor and regulate.
By Theoretical Proof and facts have proved that following current is cooling more reasonable, in order to prevent that the cooling incipient stage from producing thermal shock in air introducing place, control heater heating-up temperature before air is introduced, in advance cooling-air is heated to uniform temperature and with the change of cylinder temperature, changes the temperature of cooling-air, also need to control air mass flow simultaneously.But current cooling equipment cannot provide the suitable cooling heated drying air of the cylinder for steam turbine.
Before steam turbine start, need first to carry out warming-up, and the time cycle of warming-up is long, has a strong impact on the starting time of steam turbine.Steam turbine is being shut down when standby, even causes potential safety hazard the working life that malaria easily corrodes steam turbine internal unit and affect steam turbine.
Summary of the invention
1, need the technical problem of solution
The steam turbine accelerate cooling system that the object of this invention is to provide dehumidifying when standby of a kind of rapidly pre-warming when cooling, steam turbine starts fast when halt turbines is overhauled, halt turbines.
2, technological scheme
A kind of steam turbine accelerate cooling system, comprise and compressed-air actuated air compressor, oil and water seperator, air heater and gas collecting box are provided and control the electrical control cabinet of each equipment by what carry that the pipeline of cooling-air connects successively, between described air heater and gas collecting box, be provided with after-heater, between air heater and after-heater, be provided with the first valve, air heater and the first valve two ends are arranged in parallel the second valve, between air heater and the first valve, are provided with the pipeline that is connected gas collecting box by the 3rd valve.By air compressor, using pressurized air as source of the gas, through oil and water seperator, obtain dry air, dry air obtains dry hot air for cooling steam turbine by air heater.By electrical control cabinet, control the unlatching of two heaters and the combination of valve is moved.When steamer built-in temperature is higher, start secondary heater simultaneously, open the first valve, close second and third valve simultaneously, adopting tandem heating to make the temperature of dry air meet the requirements of rapidly temperature, to be filled with gas collecting box standby; When the temperature of steam turbine be reduced to gas collecting box in gas temperature when close, close the first valve, open second and third valve simultaneously, adopting parallel heating to obtain dry hot air that temperature is relatively low, to be filled with gas collecting box standby; When the temperature of steam turbine further reduces, close heater and directly carry out cooling by dry air.While starting rapidly pre-warming when steamer, adopt with quick cooling contrary flow process and carry out preheating.When halt turbines is standby, closes heater, by dry air, steam turbine is carried out to dehumidification treatments.
For the degree of dryness of the dry air that obtains is higher, the secondary oil and water seperator of also connecting after oil and water seperator described in air delivering pipeline, adopts secondary oil-water separation further to dewater.
For monitor this cooling system cooling air situation, between described air compressor and oil and water seperator, be provided with suction valve, air heater front end is provided with safety valve, pressure gauge and flowmeter.On described gas collecting box and after-heater, be respectively equipped with thermometer.
In order to improve the versatility of this cooling system, on described gas collecting box, be provided with the interface being connected with the live steam pipe of the steam turbine of various types.
3, beneficial effect
Compared with prior art, its remarkable advantage is in the present invention: 1, solved the cooling problem good cooling results to steam turbine thermal shock of downflow type, can regulate according to the temperature of steam turbine the temperature of cooling air; When 2, steam turbine starts, can utilize hot air to carry out preheating to steam turbine; When 3, halt turbines is standby, can utilize dry air to carry out dehumidification treatments to steam turbine; 4, this cooling system equipment can be general with the steam turbine of various models, and versatility is good.
Accompanying drawing explanation
Fig. 1 is control principle drawing of the present invention;
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in the figure, a kind of steam turbine accelerate cooling system, comprise by the compressed-air actuated air compressor 1 that provides that the pipeline of cooling-air connects is successively provided, oil and water seperator 2, air heater 3 and gas collecting box 4 and control the electrical control cabinet of each equipment, between described air heater 3 and gas collecting box 4, be provided with after-heater 5, between air heater 3 and after-heater 5, be provided with the first valve 6, air heater 3 and the first valve 6 two ends are arranged in parallel the second valve 7, between air heater 3 and the first valve 6, be provided with the pipeline that is connected gas collecting box 4 by the 3rd valve 8.By air compressor 1, using pressurized air as source of the gas, through oil and water seperator 2, obtain dry air, dry air obtains dry hot air for cooling steam turbine by air heater 3.By electrical control cabinet, control the unlatching of two heaters and the combination of valve is moved.When steamer built-in temperature is higher, start air heater 3 and after-heater 5 simultaneously, open the first valve 6, close the second valve 7 and the 3rd valve 8 simultaneously, adopting tandem heating to make the temperature of dry air meet the requirements of rapidly temperature, to be filled with gas collecting box 4 standby; When the temperature of steam turbine is reduced to when close with the interior gas temperature of gas collecting box 4, close the first valve 6, open the second valve 7 and the 3rd valve 8 simultaneously, adopting parallel heating to obtain dry hot air that temperature is relatively low, to be filled with gas collecting box 4 standby; When the temperature of steam turbine further reduces, close air heater 3 and after-heater 5 and directly carry out cooling by dry air.While starting rapidly pre-warming when steamer, adopt with quick cooling contrary flow process and carry out preheating.When halt turbines is standby, close air heater 3 and after-heater 5 carries out dehumidification treatments by dry air to steam turbine.
For the degree of dryness of the dry air that obtains is higher, the secondary oil and water seperator 9 of also connecting after oil and water seperator described in air delivering pipeline 2, adopts two-stage oil-water separation further to dewater.
For monitor this cooling system cooling air situation, between described air compressor 1 and oil and water seperator 2, be provided with the suction valve 10 of controlling compressed air require, air heater 3 front ends are provided with the flowmeter 13 that prevents the safety valve 11 of the too high damage equipment of system pressure, the pressure gauge 12 of using monitoring equipment internal pressure and monitoring compressed air require.On described gas collecting box 4 and after-heater 5, be respectively equipped with thermometer 14,15.
In order to improve the versatility of this cooling system, on described gas collecting box 4, be provided with the interface 16 being connected with the live steam pipe of the steam turbine of various types.
Claims (6)
1. a steam turbine accelerate cooling system, it is characterized in that: comprise and provide compressed-air actuated air compressor (1) by what carry that the pipeline of cooling-air connects successively, oil and water seperator (2), air heater (3) and gas collecting box (4) and control the electrical control cabinet of each equipment, between described air heater (3) and gas collecting box (4), be provided with after-heater (5), between air heater (3) and after-heater (5), be provided with the first valve (6), air heater (3) is arranged in parallel the second valve (7) with the first valve (6) two ends, between air heater (3) and the first valve (6), be provided with the pipeline that is connected gas collecting box (4) by the 3rd valve (8).
2. a kind of steam turbine accelerate cooling system as claimed in claim 1, is characterized in that: the secondary oil and water seperator (9) of also connecting after oil and water seperator described in air delivering pipeline (2).
3. a kind of steam turbine accelerate cooling system as claimed in claim 1, it is characterized in that: between described air compressor (1) and oil and water seperator (2), be provided with suction valve (10), air heater (3) front end is provided with safety valve (11), pressure gauge (12) and flowmeter (13).
4. a kind of steam turbine accelerate cooling system as claimed in claim 1, is characterized in that: described gas collecting box (4) is provided with thermometer (14).
5. a kind of steam turbine accelerate cooling system as claimed in claim 1, is characterized in that: described after-heater (5) is provided with thermometer (15).
6. a kind of steam turbine accelerate cooling system as claimed in claim 1, is characterized in that: described gas collecting box (4) is provided with the interface (16) being connected with the live steam pipe of the steam turbine of various types.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310643042.2A CN103758586A (en) | 2013-12-05 | 2013-12-05 | Rapid cooling system of steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310643042.2A CN103758586A (en) | 2013-12-05 | 2013-12-05 | Rapid cooling system of steam turbine |
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| Publication Number | Publication Date |
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| CN103758586A true CN103758586A (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310643042.2A Pending CN103758586A (en) | 2013-12-05 | 2013-12-05 | Rapid cooling system of steam turbine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196989A (en) * | 2016-09-28 | 2016-12-07 | 镇江市科能电力设备有限公司 | A kind of steam turbine blowing-out ventilation anticorrosion equipment is dried care device |
| CN106369280A (en) * | 2016-11-25 | 2017-02-01 | 江苏中能电力设备有限公司 | Fast steam turbine starting device |
| CN106368747A (en) * | 2016-11-25 | 2017-02-01 | 江苏中能电力设备有限公司 | Fast steam turbine starting system based on automatic temperature control |
| CN106523042A (en) * | 2016-12-20 | 2017-03-22 | 阳江核电有限公司 | Quick shut-down cooling system and method for steam turbine |
| CN107795340A (en) * | 2016-09-07 | 2018-03-13 | 通用电气公司 | Turbine temperatures control system |
| CN111365084A (en) * | 2020-02-24 | 2020-07-03 | 东方电气集团东方汽轮机有限公司 | Power station steam turbine maintenance system with rapid cooling function and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05106406A (en) * | 1991-10-21 | 1993-04-27 | Toshiba Corp | Cooling method for steam turbine |
| JPH0650106A (en) * | 1992-07-28 | 1994-02-22 | Toshiba Corp | Cooling/heating device for steam turbine |
| JPH0763010A (en) * | 1993-08-27 | 1995-03-07 | Toshiba Corp | Starting method for single type combined cycle power generating facility |
| CN202165131U (en) * | 2011-06-22 | 2012-03-14 | 镇江市科能电力设备有限公司 | Rapid cooling device for turbine |
| CN102839998A (en) * | 2011-06-22 | 2012-12-26 | 镇江市科能电力设备有限公司 | Rapid cooling device of steam turbine |
-
2013
- 2013-12-05 CN CN201310643042.2A patent/CN103758586A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05106406A (en) * | 1991-10-21 | 1993-04-27 | Toshiba Corp | Cooling method for steam turbine |
| JPH0650106A (en) * | 1992-07-28 | 1994-02-22 | Toshiba Corp | Cooling/heating device for steam turbine |
| JPH0763010A (en) * | 1993-08-27 | 1995-03-07 | Toshiba Corp | Starting method for single type combined cycle power generating facility |
| CN202165131U (en) * | 2011-06-22 | 2012-03-14 | 镇江市科能电力设备有限公司 | Rapid cooling device for turbine |
| CN102839998A (en) * | 2011-06-22 | 2012-12-26 | 镇江市科能电力设备有限公司 | Rapid cooling device of steam turbine |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795340A (en) * | 2016-09-07 | 2018-03-13 | 通用电气公司 | Turbine temperatures control system |
| CN107795340B (en) * | 2016-09-07 | 2022-03-08 | 通用电气公司 | Turbine temperature control system |
| CN106196989A (en) * | 2016-09-28 | 2016-12-07 | 镇江市科能电力设备有限公司 | A kind of steam turbine blowing-out ventilation anticorrosion equipment is dried care device |
| CN106369280A (en) * | 2016-11-25 | 2017-02-01 | 江苏中能电力设备有限公司 | Fast steam turbine starting device |
| CN106368747A (en) * | 2016-11-25 | 2017-02-01 | 江苏中能电力设备有限公司 | Fast steam turbine starting system based on automatic temperature control |
| CN106523042A (en) * | 2016-12-20 | 2017-03-22 | 阳江核电有限公司 | Quick shut-down cooling system and method for steam turbine |
| CN111365084A (en) * | 2020-02-24 | 2020-07-03 | 东方电气集团东方汽轮机有限公司 | Power station steam turbine maintenance system with rapid cooling function and method |
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Application publication date: 20140430 |