CN104343474A - Steam turbine, gas-steam combined cycle unit and running method of cycle unit - Google Patents
Steam turbine, gas-steam combined cycle unit and running method of cycle unit Download PDFInfo
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- CN104343474A CN104343474A CN201310319531.2A CN201310319531A CN104343474A CN 104343474 A CN104343474 A CN 104343474A CN 201310319531 A CN201310319531 A CN 201310319531A CN 104343474 A CN104343474 A CN 104343474A
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Abstract
The invention provides a steam turbine, a gas-steam combined cycle unit and a running method of the cycle unit. The gas-steam combined cycle unit comprises the steam turbine, and an SSS clutch with a synchronous automatic gear shifting function is additionally mounted between a high and medium pressure cylinder and a low-pressure cylinder of the steam turbine. The low-pressure cylinder of the steam turbine can independently stop or start running relative to the high and medium pressure cylinder, so that the gas-steam combined cycle unit can run in different modes as needed, and the heat efficiency of the whole unit is improved.
Description
Technical field
The present invention relates to electro-mechanical arts, particularly relate to steam turbine, gas-steam combined cycle set and operation method thereof.
Background technique
In thermoelectricity field, gas-steam combined cycle system, high with its power supply efficiency, run the clear superiorities such as start and stop are fast, the construction period is short, take up an area less, environmental pollution is minimum, progressively replace coal heating unit, become the development trend of present developed country.
Gas-steam Combined Cycle is gas turbine and steam turbine these two kinds by the united device of the heat engine of different thermodynamic cycle work, sometimes also referred to as combined cycle.Gas-steam combined circulating generation unit utilizes high-temperature fuel gas and steam to be working medium expansion work, thus drive electrical generators generating, gas turbine and steam turbine can be with generator separately, also can drive same generator together, different driving mode just defines to combine follows the multi-form of not generator unit shaft system configuration.By shaft system arrangement, combined cycle generating unit can be divided into single shaft and multiaxis combined cycle.
So-called combined cycle generating unit mainly comprises the equipment such as gas turbine, exhaust heat boiler and steam turbine.Wherein, single shaft combined cycle generating unit is made up of 1 gas turbine, 1 steam turbine, 1 exhaust heat boiler and 1 generator, and gas turbine and steam turbine coaxial (or by speed change gear connection) drive generator operation.Multiaxis combined cycle generating unit refers to that gas turbine and steam turbine drive the combined cycle of each self generator respectively, can be " two drag one ", " three drag one ", " four drag one " etc.
Because gas-steam combined cycle set to draw gas realization mainly through steam turbine to user's heat supply, hotspot stress is usually less, in order to ensure that cogeneration units heat supply reaches maximum, the most frequently used mode adopts extraction back-pressure turbine as the steam turbine of cogeneration units.
Adopt adjustment extraction turbine as the steam turbine of cogeneration units, when maximum heating load in order to ensure that turbine low pressure cylinder does not cause exhaust temperature to raise because of exhaust stage blade air blast, just need a certain amount of cooling steam flow to lower the temperature to it, this part cooling steam does work seldom in low pressure (LP) cylinder, heat entrained by it is recycled cooling water and absorbs through cooling tower consumption, this will cause heat waste, and the thermal efficiency of whole unit is low.
Summary of the invention
The invention provides a kind of steam turbine, to solve the low problem of the existing gas-steam combined cycle set thermal efficiency.
The present invention also provides a kind of gas-steam combined cycle set comprising above-mentioned steam turbine, the operation method of this gas-steam combined cycle set is provided simultaneously, to realize the difference that unit needs optimized distributionl according to different times, the operating mode of flexible adjustment unit, significantly improves the economical operation of unit.
For solving the problems of the technologies described above, the invention provides following technological scheme:
The invention provides a kind of steam turbine, comprise high intermediate pressure cylinder and low pressure (LP) cylinder, install additional between described high intermediate pressure cylinder and low pressure (LP) cylinder and have synchronously from the SSS clutch of gearshift function.
Further, the High inter case of described high intermediate pressure cylinder is connected with the output terminal of SSS clutch, and the low pressure rotor of described low pressure (LP) cylinder is connected with the input end of SSS clutch.
On the basis of foregoing invention design, the present invention also provides a kind of gas-steam combined cycle set, and this unit comprises steam turbine as above.
Further, also comprise generator, described generator is located at described high-pressure cylinder side.
Specifically, described high intermediate pressure cylinder steam discharge is connected by heat supply network extraction line with heat supply network, and described heat supply network extraction line is provided with heat supply network extraction control valve; Described high intermediate pressure cylinder is connected by mesolow steam guiding tube road with low pressure (LP) cylinder, and described mesolow steam guiding tube road is provided with steam valve.Described steam turbine is according to thermal load demands, and can carry out taking out solidifying and back pressure pattern and switch fast, steam turbine can be thrown low pressure (LP) cylinder away and run.
Above-mentioned gas-steam combined cycle set, in running, will need to change operating mode according to electricity, heat load, make described steam turbine in pure condensate, take out and coagulate and switch under back pressure three kinds of different modes;
Wherein, this unit in the winter time for thermal condition time switch to pure back pressure operation mode, by SSS clutch by described low pressure (LP) cylinder off-the-line, whole steam discharge of the intermediate pressure cylinder of described steam turbine and the main vapour of low pressure all for heating heat exchangers for district heating, to the heat supply of heating power outer net pipeline; Heat load lower or non-for thermal condition time, described high intermediate pressure cylinder and low pressure (LP) cylinder are linked to be an axle by described SSS clutch, and steam turbine changes into takes out the solidifying or pure condensate method of operation.
Specifically, above-mentioned pure condensate operating mode is specially:
When non-confession thermal condition, the height of described steam turbine, middle pressure rotor and low pressure rotor are linked to be an axle by clutch, by blocking device by SSS clutch locks, and the steam valve standard-sized sheet to the described steam valve closedown of heat supply network, described low pressure (LP) cylinder air pipe; Steam enters the acting of described low pressure (LP) cylinder, and the exhaust steam after acting is discharged to vapour condenser, and now steam turbine is pure condensate operating mode.
Above-mentioned back pressure operation pattern is specially:
When Winter heat supply demand is large, when requiring the maximum heating load of described unit band, described SSS clutch blocking device is switched to released state, close to the steam valve on described low pressure (LP) cylinder steam guiding tube, stop to described low pressure (LP) cylinder admission, described low pressure (LP) cylinder will stop work done, after low pressure rotor is lower than the rotating speed of high, middle pressure rotor, low pressure rotor will be thrown off off-the-line by described SSS clutch automatically, and now described steam turbine is back pressure operation pattern; The steam valve drawn gas to heat supply network controls described high intermediate pressure cylinder exhaust steam pressure, high intermediate pressure cylinder steam discharge and the main vapour of low pressure all for heating heat exchangers for district heating, to obtain larger heat capacity and the higher thermal efficiency.
Further, when part heat load operating mode, steam turbine can adopt to be taken out solidifying mode and runs, as long as to low pressure (LP) cylinder admission, low pressure rotor will speedup, after rotating speed equals the rotating speed of height, intermediate pressure cylinder, low pressure rotor will be started work done by SSS clutch automatically side by side, reaches desired value with the ratio realizing heat load and electric load.
When described take out that solidifying mode is maximum to be run for thermal condition time, a minimum aperture to be ensured to the steam valve on described low pressure (LP) cylinder steam guiding tube, both prevent low pressure rotor air blast and the minimum steam flow that causes low pressure (LP) cylinder temperature to raise.
Compared with prior art, steam turbine provided by the invention can make the low pressure (LP) cylinder of steam turbine independently or startup optimization out of service with high intermediate pressure cylinder, steam turbine is made under different operating mode, to adopt different mode to run, for the thermal efficiency improving whole unit creates condition; Gas-steam combined cycle set provided by the invention, owing to can adopt different mode operations as required under different operating modes, can improve the thermal efficiency of whole unit.
Accompanying drawing explanation
Fig. 1 is that of steam turbine of the present invention implements block diagram;
Fig. 2 is embodiment's block diagram of gas-steam combined cycle set of the present invention.
Shown in figure, RH steam refers to reheated steam, HP steam refers to high pressure main steam, LP steam refers to low pressure main steam.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, but not as a limitation of the invention.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, steam turbine provided by the invention comprises high intermediate pressure cylinder 101, low pressure (LP) cylinder 102 and synchronous (SSS, SYNCHRO SELF SHIFTING) clutch 103 of gearshift certainly.
SSS clutch, refers to and has synchronously from the clutch of gearshift function (also can be called synchronous autospasy function), synchronously refers to that clutch engages, and output terminal is driven when the rotating speed tendency of SSS clutch input exceedes output terminal from gearshift function; When SSS clutch input rotating speed tendency reduces relative to output terminal, produce opposing torque, throw-out-of clutch.
As shown in Figure 1, SSS clutch 103 is arranged between steam turbine high intermediate pressure cylinder 101 and low pressure (LP) cylinder 102, and the High inter case 1011 of steam turbine high intermediate pressure cylinder 101 is connected by SSS clutch 103 with the low pressure rotor 1021 of low pressure (LP) cylinder 102.Specifically, the output terminal 1031 of SSS clutch 103 is connected with the High inter case 1011 of steam turbine, and the input end 1032 of SSS clutch 103 is connected with the low pressure rotor 1021 of steam turbine.Above-mentioned high intermediate pressure cylinder 101 is cylinder combined structures of high-pressure cylinder and intermediate pressure cylinder.Generator 105 is arranged in high-pressure cylinder 101 side, can be driven by High inter case 1011 separately, also can by meshing together low pressure rotor 1021 by SSS clutch 103 and High inter case 1011 drives jointly.
When steam turbine is in the common running state of high intermediate pressure cylinder 101 and low pressure (LP) cylinder 102, High inter case 1011 and the low pressure rotor 1021 of steam turbine are engaged automatically by SSS clutch 103, common drive electrical generators.
When turbine low pressure cylinder 102 is out of service, after the rotating speed of low pressure rotor 1021 lower than High inter case 1011, low pressure rotor 1021 will be thrown off off-the-line by SSS clutch 103 automatically, make the low pressure (LP) cylinder 102 of steam turbine can be out of service separately independent of the high-pressure cylinder 101 of steam turbine, by High inter case 1011 drive electrical generators separately.
When never running state puts into operation low pressure (LP) cylinder 102, low pressure rotor 1021 can along with the operation speedup gradually of low pressure (LP) cylinder 102, when after rotating speed a little more than High inter case 1011 of the rotating speed of low pressure rotor 1021, low pressure rotor 1021 will engage with High inter case 1011 by SSS clutch 103 automatically, common drive electrical generators, thus the running state of steam turbine is remained on high intermediate pressure cylinder and the common running state of low pressure (LP) cylinder 102.
When low pressure (LP) cylinder 102 is out of service, only when SSS clutch 103 blocking device is switched to released state, High inter case 1011 and low pressure rotor 1021 could be thrown off off-the-line by SSS clutch 103, by out of service for low pressure (LP) cylinder 102, can prevent from causing SSS clutch 103 when off-the-line should not be thrown off because ambient conditions impact or low pressure (LP) cylinder 102 run appearance fluctuation in running for SSS clutch 103 installs blocking device additional, High inter case 1011 and low pressure rotor 1021 are thrown off off-the-line.
The invention provides a kind of gas-steam combined cycle set, mainly comprise the equipment such as gas turbine, steam turbine, exhaust heat boiler, generator, in addition, also need to comprise necessary electrical equipment, control apparatus and auxiliary facility, this necessaries or auxiliary facility are prior art, can select voluntarily as those skilled in the art according to need of production.Preferably, what unit provided by the invention adopted is 2GTG & HRSG(gas turbine and exhaust heat boiler)+1STG(steam turbine) Combined Cycle Unit collocation form, two gas engines are used to drive a steam turbine by exhaust heat boiler, the i.e. unit of " two drag one " form, the structure of steam turbine wherein as in the prior embodiments, all between high intermediate pressure cylinder and low pressure (LP) cylinder, be provided with SSS clutch 103, do not repeat them here.
As shown in Figure 2, the high intermediate pressure cylinder 201 of the steam turbine of gas-steam combined cycle set is connected by heat supply network extraction line 204 with heat supply network, heat supply network extraction line 204 to heat supply network steam discharge, described heat supply network extraction line 204 is provided with heat supply network extraction control valve (ELCV) 206 for high intermediate pressure cylinder 201; High intermediate pressure cylinder 201 is connected by steam guiding tube road 205 with low pressure (LP) cylinder 202, mesolow steam guiding tube road 205 for high intermediate pressure cylinder 201 to low pressure (LP) cylinder 202 steam discharge, described low pressure steam guiding tube road 205 is provided with steam stop steam valve 207(MESV MECV).Connect by installing SSS clutch 103 additional between the high intermediate pressure cylinder 201 of this unit and low pressure (LP) cylinder 202, steam turbine can be made in pure condensate, take out solidifying, switch under back pressure 3 kinds of patterns, make unit changeable according to the back pressure machine method of operation in the winter time, by SSS clutch by low pressure (LP) cylinder 202 off-the-line, whole steam discharge of high intermediate pressure cylinder and the main vapour of low pressure are all for heating heat exchangers for district heating, to the heat supply of heating power outer net pipeline, improve the heat capacity of unit, heat load lower or non-for thermal condition time, steam turbine changes into takes out solidifying or the pure condensate method of operation, unit is made to have good generated energy and generating efficiency.
Specifically, when unit is in non-confession thermal condition, High inter case and low pressure rotor are linked to be an axle by clutch, by blocking device, SSS clutch 203 is locked, high intermediate pressure cylinder 201 steam discharge on the heat supply network extraction line 204 of heat supply network ELCV206 close, high intermediate pressure cylinder 201 steam discharge to the MESV on the mesolow steam guiding tube road 205 of low pressure (LP) cylinder 202 MECV207 standard-sized sheet, steam enters low pressure (LP) cylinder 202 and does work, exhaust steam after acting is discharged to vapour condenser 209, and now steam turbine is pure condensate operating mode.
At the beginning of heat supply, latter stage and heat demand amount are increasing and decreasing process gradually, and unit is when being in part heat load operating mode, steam turbine can adopt to be taken out solidifying mode and runs, desired value is reached with the ratio realizing heat load and electric load, when taking out solidifying mode maximum confession thermal condition operation, high intermediate pressure cylinder 201 steam discharge will ensure a minimum aperture to the MECV207 on the mesolow steam guiding tube road 205 of low pressure (LP) cylinder 202, this aperture sets according to the difference of unit and operation conditions, both the minimum steam flow that low pressure (LP) cylinder temperature raises had been prevented, now steam turbine is for taking out solidifying operating mode, also be at present generally for the heat supply mode that thermoelectricity plant often adopts.
When Winter heat supply demand is large, when requiring the maximum heating load of unit band, unit is switched to back pressure mode, namely, SSS clutch 203 blocking device is switched to released state, close high intermediate pressure cylinder 201 steam discharge to the MESV on the mesolow steam guiding tube road 205 of low pressure (LP) cylinder 202 MECV207, stop to low pressure (LP) cylinder 202 admission, low pressure 202 will stop work done, when low pressure rotor is lower than height, after the rotating speed of middle pressure rotor, low pressure rotor will be thrown off off-the-line by SSS clutch 203 automatically, now steam turbine is back pressure operation pattern, high intermediate pressure cylinder steam pressure is controlled to the ELCV206 on the heat supply network extraction line 204 of heat supply network, the steam discharge of high intermediate pressure cylinder 201 and the main vapour of low pressure are all for heating heat exchangers for district heating, to obtain larger heat capacity and the higher thermal efficiency.
When needs be switched to take out solidifying operating mode time, as long as open high intermediate pressure cylinder 201 steam discharge to the MESV on the mesolow steam guiding tube road 205 of low pressure (LP) cylinder 202 MECV207, low pressure (LP) cylinder 202 is devoted oneself to work, low pressure rotor will speedup gradually, after rotating speed equals the rotating speed of height, rotor, low pressure rotor will be started work done by SSS clutch 203 automatically side by side.Locking device now can be used to be locked by SSS clutch 203.
During unit back pressuce mode operation, vapour condenser maintains rough vacuum, and circulation is switched to circulating pumps in winter and runs, and heat supply network is hydrophobic all gets back to vapour condenser.
Unit provided by the invention can at utmost improve gas-steam combined cycle set heat capacity, than existing " two drag one " Gas-steam Combined Cycle thermal power plant unit put into operation under the condition that generated output is suitable, heat supply is exerted oneself raising about 15 ~ 20%, and generatine set heat efficiency improves about 5%.
Generally speaking, non-heating period is according to condensing or take out solidifying mode and run, winter unit back pressuce heat supply running.According to unit feature, all can get back to vapour condenser by hydrophobic for heat supply network, condensate pump can adopt usually the allocation plan of used 3 × 50%, and fixed pressure operation, when unit normally runs, 2 operation condensate pumps can run in high efficient area.This kind of solidifying pump allocation plan simplifies the thermodynamic system of whole cycle machine set, can reduce the initial outlay of condensate pump and frequency variator thereof on the one hand, saves 4 heat supply network drainage pumps (2 fortune 2 are standby) and frequency variator thereof; Also can reduce solidifying pump operation cost on the other hand, save the operating cost of heat supply network drainage pump simultaneously.
Further, described unit can also comprise with enclosed water-cooled heat supply network secondary drain cooler, it is high that solution unit takes out solidifying operating mode heat supply network drain temperature, drain into vapour condenser and will occur the hydrophobic vaporization phenomenon of heat supply network, also be convenient to unit take out solidifying operating mode and be switched to back pressure operating mode, vapour condenser is transitioned into low vacuum state by high vacuum and runs.
Illustrate that the pattern of cycle machine set of the present invention switches with an example below.
1, steam turbine transfers back pressure pattern to by taking out solidifying pattern
1.1 confirm that unit takes out solidifying mode normal operation, without the defect that Effect Mode switches.
1.2 confirm that each watt of vibration, bearing temperature, axial displacement are normal.
1.3 confirm that steam turbine lubrication pressure, oil screen differential pressure, oil temperature are normal.
1.4 monitor that SSS clutch returning-oil temperature is normal.
1.5 confirm that intermediate pressure cylinder exhaust steam pressure is normal, and the protection of intermediate pressure cylinder exhaust steam pressure drops into normal.
1.6 man-machine interactions, switch to operating mode " back pressure mode ".
1.7 monitor each equipment operating position in picture, comprise the Vibration Condition etc. that SSS clutch is switched to " UNLOCK " position, steam turbine.
1.8 monitor that ELCV drops into automatically.
1.9 monitor that MECV should close gradually, and rotational speed of lower pressure turbine rotor declines.
1.10 monitor that MECV closes, MESV closes.
1.11 monitor SSS clutch returning-oil temperature rising situation, and solidifying pattern is taken out in switchback immediately if desired.
2, steam turbine is converted to by back pressure pattern and takes out solidifying pattern
2.1 confirm unit back pressuce mode normal operation.
2.2 open draining valve before and after MESV, heating coil, monitor condenser pressure change.
2.3 drop into secondary heat networks drain cooler runs.
2.4 all open vapour condenser for backwater power door operation, start circulating water pump.
2.5 check normally, and just operating mode switches to and takes out solidifying mode.
2.6 check that MESV opens.
2.7 monitor that MECV should open greatly gradually, and low pressure rotor raising speed is normal.
2.8 monitor rotational speed of lower pressure turbine rotor, low pressure (LP) cylinder exhaust temperature and exhaust stage blade temperature variation.
2.9 monitor that SSS clutch is switched to " LOCK " position.
2.10 monitor that MECV drops into automatically.
2.11 monitor that ELCV is switched to manually, turn down ELCV immediately, control intermediate pressure cylinder exhaust steam pressure in normal operation range, MECV are opened to minimum aperture more than 6%, and has adjustment surplus.
2.12 close draining valve before and after MESV.
2.13 look over one's shoulder heat exchangers for district heating water level and temperature rise.Timely adjustment heat supply network quantity of circulating water, prevents heat exchangers for district heating overtemperature.
In order to further illustrate the excellent results that of the present invention two drag a Gas-steam Combined Cycle thermal power plant unit, the invention provides following application example:
Gas-steam Combined Cycle thermal power plant unit comprises 2 306.9MW M701F4 type combustion engine, 2 exhaust heat boilers, 1 309.6MW heating steam turbine.Performance guarantee operating mode power 923.42MW, for thermal condition power 827.08MW, design heating load 2340GJ/H, area of heat-supply service is 1,300 ten thousand square metres.Through overtesting, can reach 2600GJ/H, area of heat-supply service can reach 1,450 ten thousand square metres, than design increase by 1,500,000 square metres.
1, in prior art, adopt the maximum unit heating load of taking out solidifying mode heat supply to be 2102GJ/H, area of heat-supply service 1,160 ten thousand square metres, by comparison, heating load increase about 500GJ/H, heat supply surface increase about 2,800,000 square metres, increasing amount is about 24% to this unit.
2, SSS clutch back pressure takes out solidifying operation very simply, reaches a key and switches, according to the demand of heating load, can complete in 15 minutes, take out the switching of coagulating between back pressure.
3, well-known, 300MW unit efficiency is substantially about 41%, and the heat about more than 50% is converted into the latent heat of vaporization discharged in water of condensation process by low pressure (LP) cylinder steam discharge, taken away by recirculated cooling water, is discharged in air, causes thermo-pollution.Back pressure mode, does not have cold source energy substantially, the latent heat of vaporization is converted to heat supply network water supply energy.Run according to taking out solidifying mode, unit combined cycle efficiency reaches about 84%; Back pressure mode is run, and unit combined cycle efficiency reaches more than 89%.
4, because back pressure unit affects seriously by ambient temperature and heat load, adopt SSS clutch to achieve pure condensate on same unit, take out freely switching of solidifying, back pressure mode, so just break the restriction between optimized distributionl, according to optimized distributionl demand, the method of operation of flexible control unit, ensures the safe and stable operation of electrical network and heat supply network.
It should be noted that and the foregoing is only preferred embodiment of the present invention, not thereby limit scope of patent protection of the present invention, the present invention can also carry out the improvement of equivalence to the structure of above-mentioned various component.Therefore the equivalent structure change that all utilizations specification of the present invention and diagramatic content are done, or directly or indirectly apply to other correlative technology fields and be all in like manner all included in the scope that the present invention contains.
Claims (10)
1. a steam turbine, comprises high intermediate pressure cylinder and low pressure (LP) cylinder, it is characterized in that, installs additional and have synchronously from the SSS clutch of gearshift function between described high intermediate pressure cylinder and low pressure (LP) cylinder.
2. steam turbine as claimed in claim 1, it is characterized in that, the High inter case of described high intermediate pressure cylinder is connected with the output terminal of SSS clutch, and the low pressure rotor of described low pressure (LP) cylinder is connected with the input end of SSS clutch.
3. a gas-steam combined cycle set, is characterized in that, this unit comprises steam turbine as claimed in claim 1 or 2.
4. cycle machine set as claimed in claim 3, it is characterized in that, also comprise generator, described generator is located at described high-pressure cylinder side.
5. cycle machine set as described in claim 3 or 4, is characterized in that, described high intermediate pressure cylinder steam discharge is connected by heat supply network extraction line with heat supply network, and described heat supply network extraction line is provided with heat supply network extraction control valve;
Described high intermediate pressure cylinder is connected by mesolow steam guiding tube road with low pressure (LP) cylinder, and described mesolow steam guiding tube road is provided with steam valve.
6. the operation method of a gas-steam combined cycle set, it is characterized in that, gas-steam combined cycle set is as described in arbitrary in claim 3-5, in running, this unit needs to change operating mode according to electricity, heat load, makes described steam turbine in pure condensate, takes out and coagulate and switch under back pressure three kinds of different modes;
This unit in the winter time for thermal condition time switch to pure back pressure operation mode, by SSS clutch by described low pressure (LP) cylinder off-the-line, whole steam discharge of the intermediate pressure cylinder of described steam turbine and the main vapour of low pressure all for heating heat exchangers for district heating, to the heat supply of heating power outer net pipeline;
This unit heat load lower or non-for thermal condition time, described high intermediate pressure cylinder and low pressure (LP) cylinder are linked to be an axle by described SSS clutch, and steam turbine changes into takes out the solidifying or pure condensate method of operation.
7. operation method as claimed in claim 6, it is characterized in that, described pure condensate operating mode is specially:
When non-confession thermal condition, the height of described steam turbine, middle pressure rotor and low pressure rotor are linked to be an axle by clutch, by blocking device by SSS clutch locks, and the steam valve standard-sized sheet to the described steam valve closedown of heat supply network, described low pressure (LP) cylinder air pipe;
Steam enters the acting of described low pressure (LP) cylinder, and the exhaust steam after acting is discharged to vapour condenser, and now steam turbine is pure condensate operating mode.
8. operation method as claimed in claims 6 or 7, it is characterized in that, described back pressure operation pattern is specially:
When Winter heat supply demand is large, when requiring the maximum heating load of described unit band, described SSS clutch blocking device is switched to released state, close to the steam valve on described low pressure (LP) cylinder steam guiding tube, stop to described low pressure (LP) cylinder admission, described low pressure (LP) cylinder will stop work done, after low pressure rotor is lower than the rotating speed of high, middle pressure rotor, low pressure rotor will be thrown off off-the-line by described SSS clutch automatically, and now described steam turbine is back pressure operation pattern;
The steam valve drawn gas to heat supply network controls described high intermediate pressure cylinder exhaust steam pressure, high intermediate pressure cylinder steam discharge and the main vapour of low pressure all for heating heat exchangers for district heating, to obtain larger heat capacity and the higher thermal efficiency.
9. operation method as claimed in claim 7, is characterized in that, described in take out solidifying operating mode and be specially:
When part heat load operating mode, steam turbine can adopt to be taken out solidifying mode and runs, as long as to low pressure (LP) cylinder admission, low pressure rotor will speedup, after rotating speed is a little more than the rotating speed of high, intermediate pressure cylinder, low pressure rotor will be started work done by SSS clutch automatically side by side, reaches desired value with the ratio realizing heat load and electric load.
10. operation method as claimed in claim 9, it is characterized in that, described when taking out that solidifying mode is maximum to be run for thermal condition, a minimum aperture to be ensured to the steam valve on described low pressure (LP) cylinder steam guiding tube, both prevent low pressure rotor air blast and the minimum steam flow that causes low pressure (LP) cylinder temperature to raise.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246263A (en) * | 2016-08-19 | 2016-12-21 | 华北电力科学研究院有限责任公司 | Extracted steam from turbine heat supply and back pressure are for hot change-over method |
| CN107016168A (en) * | 2017-03-10 | 2017-08-04 | 天津市电力科技发展有限公司 | Combined cycle gas-steam turbine unit heating performance computational methods |
| CN107202082A (en) * | 2017-07-14 | 2017-09-26 | 上海电气电站设备有限公司 | Possesses the self-synchronizing clutch low speed synchronous method of low speed defencive function |
| CN110131004A (en) * | 2019-05-09 | 2019-08-16 | 北京京桥热电有限责任公司 | The control method and device of Combined cycle gas-steam turbine Unit Commitment peak regulation |
| CN111902608A (en) * | 2018-03-29 | 2020-11-06 | 三菱动力株式会社 | Single-shaft combined cycle apparatus, method for testing single-shaft combined cycle apparatus, and control device for single-shaft combined cycle apparatus |
| CN113404561A (en) * | 2021-06-29 | 2021-09-17 | 太原理工大学 | Thermal power generating unit double-machine combined heat supply control method and system |
| CN113465825A (en) * | 2021-06-29 | 2021-10-01 | 西安热工研究院有限公司 | Logic control method for valve tightness test of coaxial steam turbine of circulating unit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5099643A (en) * | 1989-01-26 | 1992-03-31 | General Electric Company | Overspeed protection for a gas turbine/steam turbine combined cycle |
| CN2869331Y (en) * | 2006-01-27 | 2007-02-14 | 沈同银 | Steam turbine condensing-back pressure two-purpose machine |
| CN102140938A (en) * | 2011-03-18 | 2011-08-03 | 上海电气电站设备有限公司 | Double-cylinder coaxial combined cycle heat supply gas turbine |
| CN102889630A (en) * | 2012-09-29 | 2013-01-23 | 华北电力大学 | Low-grade heating system provided with novel heat supply turbine and operating and regulating method thereof |
| CN103016083A (en) * | 2012-12-26 | 2013-04-03 | 北京国电蓝天节能科技开发有限公司 | Back pressure and straight condensing switching heat supply system |
| CN103032111A (en) * | 2012-12-14 | 2013-04-10 | 上海电气电站设备有限公司 | Control protection method for two-driven-one combined cycle extraction condensing back pressure turbine |
| CN202914145U (en) * | 2012-07-23 | 2013-05-01 | 杨耀攀 | New shafting of gas-steam combined cycle 'one-on-one' unit |
-
2013
- 2013-07-26 CN CN201310319531.2A patent/CN104343474A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5099643A (en) * | 1989-01-26 | 1992-03-31 | General Electric Company | Overspeed protection for a gas turbine/steam turbine combined cycle |
| CN2869331Y (en) * | 2006-01-27 | 2007-02-14 | 沈同银 | Steam turbine condensing-back pressure two-purpose machine |
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