CN107227979B - A kind of combination circulation steam turbine quick start warming-up system and method - Google Patents
A kind of combination circulation steam turbine quick start warming-up system and method Download PDFInfo
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- CN107227979B CN107227979B CN201710575265.8A CN201710575265A CN107227979B CN 107227979 B CN107227979 B CN 107227979B CN 201710575265 A CN201710575265 A CN 201710575265A CN 107227979 B CN107227979 B CN 107227979B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/34—Turning or inching gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D11/00—Clutches in which the members have interengaging parts
- F16D11/16—Clutches in which the members have interengaging parts with clutching members movable otherwise than only axially
Abstract
The present invention relates to gas-steam combined cycle system technical field more particularly to a kind of combination circulation steam turbine quick start warming-up system and methods.The system includes gas turbine, generator, self-synchronizing clutch, steam turbine, rolling gear of turbine and warming-up vapour source, and steam turbine includes high, medium and low cylinder pressure, and warming-up vapour source, which is connected with, leads to high, intermediate pressure cylinder warming-up steam conveying pipe.This method are as follows: turbine speed is promoted by rolling gear of turbine, turbine speed is made to surmount gas turbine rotary speed；The principal screw type slide unit that clutch is agitated with hand lever slides principal screw slide unit to the direction of clutch input, until the phase alignment of the driving tooth of clutch and driven tooth, realizes the engagement of clutch；Warming-up steam is passed through into steam turbine, steam turbine drives turbine turns, starts warming-up；Terminate warming-up when pressing temperature of rotor to reach preset temperature in steam turbine or warm-up period reaches preset time.The cold start time can be shortened.
Description
Technical field
The present invention relates to gas-steam combined cycle system technical field more particularly to a kind of combination circulation steam turbine are fast
Speed starting warming-up system and method.
Background technique
Steam turbine is the key that one of power-equipment in power plant construction, is to convert thermal energy into mechanical energy and then be converted into electricity
The energy conversion device of energy.High temperature, the high steam generated by boiler converts thermal energy and pressure potential by steam turbine
At the mechanical energy of steam turbine, the acting of turbine rotor output shaft is driven, which is passed to by turbine rotor output shaft
Generator, to convert mechanical energy into electric energy.
Gas-steam combined cycle system refers to using gas turbine as preposition turbine, and combustion gas wheel is recycled with waste heat boiler
The exhaust heat of machine, the steam of output inject steam turbine, and steam expansion work and exports electric energy in steam turbine.Fuel gas-steam
Combined cycle is the gas turbine with higher average endothermic temperature in conjunction with the steam turbine having compared with harmonic(-)mean exothermic temperature
Get up, so that the high-temperature tail gas of gas turbine is entered waste heat boiler and generate steam, and steam is made to continue acting power generation in steam turbine,
The heat utilization rate of entire combined cycle system is set to be significantly improved compared with simple cycle.The net efficiency of combined cycle system power generation
Up to 48%~62%.
Gas turbine and steam turbine in gas-steam combined cycle system can be designed to uniaxial arrangement or multiaxis cloth
It sets.Single shaft arrangement i.e. gas turbine shafting and the shafting of steam turbine are connected into a shafting, drive same generator jointly.It is more
Axis arrangement is that gas turbine and steam turbine respectively drive individual generator.Uniaxial combined cycle unit has system simplification, cloth
The advantages such as compact, plant area is small, civil engineering cost is low are set, are promoted and applied rapidly in recent years, it is especially of new generation high-power
It closes in circulation and uniaxial combined cycle unit is widely used.
Most widely one is be equipped with certainly between steam turbine and generator for uniaxial combined cycle unit currently on the market
Dynamic timing clutch, the combined cycle unit peaking performance of this kind of form is excellent, and gas turbine can isolated operation.But this kind
The uniaxial combined cycle unit of form starts slower phenomenon there are steam turbine when cold start.During cold start, combustion
Gas-turbine starting speed is fast, and it is slow that steam turbine starts speed.Therefore, when starting or gas turbine long-time underrun is allowed,
Steam turbine warming-up is waited, causes the thermal efficiency lower；The quick application of load of gas turbine is allowed to participate in peaking operation, at this point, due to
The steam turbine of cold conditions not yet warms up, and the steam that most of waste heat boiler generates is not allowed to enter steam turbine acting, but directly
Condenser is drained by bypass, biggish energy loss is thus inevitably produced, increases cost of electricity-generating.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of reduction combination circulation steam turbine warming-ups, and time-consuming, shortening cold conditions opens
The combination circulation steam turbine quick start warming-up system and method for dynamic time, to overcome the drawbacks described above of the prior art.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme:
A kind of combination circulation steam turbine quick start warming-up system, including warming-up vapour source and coaxially arranged and be sequentially connected
Gas turbine, generator, clutch and steam turbine, gas turbine and steam turbine share a rolling gear of turbine, and vapour
Turbine barring gear is connect with steam turbine, and steam turbine includes high pressure cylinder, intermediate pressure cylinder and low pressure (LP) cylinder, and warming-up vapour source, which is connected with, leads to height
The warming-up steam conveying pipe of cylinder pressure and intermediate pressure cylinder.
Preferably, the air intake of high pressure cylinder is connected to High Pressure Steam Host Piping, on High Pressure Steam Host Piping from upstream under
Trip is successively arranged motor-operated isolation valve and high-pressure admission valve group, and warming-up steam conveying pipe is by high-pressure delivery pipeline in electronic isolation
It is connected between valve and high-pressure admission valve group with High Pressure Steam Host Piping.
Preferably, series connection is set there are two high-pressure stop valve on high-pressure delivery pipeline.
It preferably, further include reheater, the steam drain of high pressure cylinder is connected to by high jet chimney of arranging with the entrance of reheater,
The outlet of reheater is pressed into steam pipe road and is connected to the air intake of intermediate pressure cylinder in passing through, in be pressed into steam pipe road be equipped in be pressed into steam valve
Group.
Preferably, it is pressed into and is pressed into the upstream of steam valve group on steam pipe road in and is additionally provided with a gate valve, warming-up steam pipeline
Road by middle pressure conveyance conduit gate valve and in be pressed between steam valve group and be pressed into steam pipe road in and be connected to.
Preferably, it includes middle pressure stop valve and reheat control valve that steam valve group is pressed into, middle pressure stop valve and reheat control valve
Between be equipped with rapid cooling interface, warming-up steam conveying pipe by middle pressure conveyance conduit rapid cooling interface and in be pressed into steam pipe road company
It is logical.
Preferably, series connection is set there are two middle pressure cutoff valve on middle pressure conveyance conduit.
Preferably, regulating valve is additionally provided in the upstream of two middle pressure cutoff valves on middle pressure conveyance conduit.
A kind of combination circulation steam turbine quick start method of warming up, comprising the following steps: step S1, gas turbine is in quiet
Only state or the state in revolving speed lower than turbine speed；Step S2, by rolling gear of turbine by the revolving speed of steam turbine
It is promoted to n rpm clock, the revolving speed of steam turbine is made to surmount the revolving speed of gas turbine；Step S3, clutch is agitated with a hand lever
Principal screw type slide unit slides principal screw type slide unit to the direction of clutch input, until the driving tooth of clutch
With the phase alignment of driven tooth, the engagement of clutch is realized；Step S4, rolling gear of turbine dragging steam turbine, generator and
Gas turbine rotates together；Step S5, it is passed through warming-up steam into steam turbine, starts warming-up, gas turbine is driven by steam turbine
It is rotated with generator, steam turbine drives gas turbine and the revolving speed of generator rotation to be maintained at p revs/min, and meets p > n；Step
Rapid S6, when pressing the temperature of rotor to reach preset temperature in steam turbine or warm-up period reaches preset time, cutting warming-up steams
Vapour terminates warming-up, and gas turbine and steam turbine restore to jiggering state.
Preferably, in step s 2, n meets: 1≤n≤120.
Preferably, in step s 5, p meets: 120≤p≤1000.
Preferably, in step s 5, warming-up steam be the high row's steam or adjacent unit of adjacent unit low pressure filling or
The heating steam or starting trouble steam of adjacent unit.
Preferably, solidifying by what is generated in the condenser of steam-turbine unit when warming-up steam uses the steam of adjacent unit
Foldback is born water to return in the hot well of adjacent unit.
Preferably, in step s 5, after starting warming-up, the pressure of condenser in steam-turbine unit is improved.
Preferably, in step s 5, the pressure of condenser is controlled in 10KPa-30KPa.
Preferably, in step s 6, preset temperature is not less than 150 DEG C.
Compared with prior art, the present invention has significant progress:
Combination circulation steam turbine quick start warming-up system of the invention, can gas turbine starting before, first with
The warming-up steam that warming-up vapour source provides carries out red switch pre-warm to steam turbine, improves the initial temperature of steam turbine, can make steam turbine earlier
Load carrying can greatly shorten needed for combined cycle unit cold start while increasing peak modulation capacity and generated energy
Time, energy saving and start-up cost improve the flexibility of unit cold start.
Combination circulation steam turbine quick start method of warming up of the invention, before gas turbine starting, first with warming-up
Steam carries out red switch pre-warm to steam turbine, improves the initial temperature of steam turbine, can make steam turbine load carrying earlier, increases peak regulation
While ability and generated energy, the time needed for combined cycle unit cold start can be greatly shortened, energy saving and starting
Cost improves the flexibility of unit cold start.Also, by the way of pushing clutch engagement manually, clutch can be made
It engages, to realize gas turbine and steam turbine under the low speed synchronous, exists it is possible thereby to completely eliminate clutch under the low speed
Because output end beats the risk of lock bring clutch damage when automatic synchronization under low speed.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the combination circulation steam turbine quick start warming-up system of the embodiment of the present invention two.
Fig. 2 is the structural schematic diagram of the combination circulation steam turbine quick start warming-up system of the embodiment of the present invention three.
Fig. 3 is the schematic illustration of Manual clutch engagement of the invention.
Fig. 4 is the driving tooth of clutch of the invention and the schematic diagram of driven tooth phase alignment.
In figure:
100, warming-up steam conveying pipe 101, high-pressure delivery pipeline 102, middle pressure conveyance conduit
200, High Pressure Steam Host Piping 300, high row's jet chimney 400, in be pressed into steam pipe road
500, high pressure turbine by 600, intermediate pressure by-pass 700, air pipeline
HP, high pressure cylinder IP, intermediate pressure cylinder LP, low pressure (LP) cylinder
1, gas turbine 2, clutch 3, warming-up vapour source
4, transfer valve 51, high pressure main stop valve 52, septum valve
6, motor-operated isolation valve 7, high-pressure stop valve 8, reheater
91, middle pressure stop valve 92, reheat control valve 93, rapid cooling interface
10, high exhaust check valve 11, middle pressure cutoff valve 12, regulating valve
13, high pressure bypass valve 14, condenser 15, intermediate pressure by-pass valve
16, ventilation valve 17, generator 18, rolling gear of turbine
19, gate valve 22, pawl 23, output end
231, driven tooth 232, driven tooth 24, input terminal are relayed
25, screw type slide unit 251, relaying driving tooth 26, principal screw type slide unit are relayed
261, driving tooth 27, servo helical spline 28, principal screw spline
29, hand lever
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.These embodiments are only used for
Illustrate the present invention, and not limitation of the present invention.
In the description of the present invention, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
In addition, in the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.
Embodiment one
The embodiment of the present invention one provides a kind of combination circulation steam turbine quick start method of warming up, the connection of the present embodiment one
The cold start that turbine cycle quick start method of warming up is suitable for the uniaxial combined cycle unit equipped with clutch is closed, it is described
Uniaxial combined cycle unit is equipped with generator between gas turbine and steam turbine, one end of alternator shaft and gas turbine
Rotor axis connection, the other end of alternator shaft then pass through the rotor axis connection of clutch and steam turbine.Gas turbine and steamer
Machine shares the same rolling gear of turbine, and rolling gear of turbine is connect with steam turbine.Steam turbine disk in the present embodiment one
The capacity of vehicle device should meet can drag steam turbine, generator and turbine turns simultaneously.
Clutch in embodiment one can realize engagement by way of pushing manually.As shown in figure 3, the present embodiment one
The clutch of middle use includes input terminal 24, output end 23, pawl 22, principal screw type slide unit 26 and relaying screw type sliding
Component 25, the rotor axis connection of input terminal 24 and steam turbine, output end 23 are connect with the shaft of generator 17.Input terminal 24 and master
Cooperated between screw type slide unit 26 by principal screw spline 28, principal screw type slide unit 26 and relaying screw type sliding part
Cooperated between part 25 by servo helical spline 27, principal screw type slide unit 26 and relaying spiral are driven when input terminal 24 rotates
Type slide unit 25 rotates together.The setting of pawl 22 is on relaying screw type slide unit 25, and output end 23 is equipped with and pawl
22 ratchets matched.When 24 revolving speed of input terminal is greater than 700 revs/min, pawl 22 can pop up under the influence of centrifugal force,
If the revolving speed of input terminal 24 is greater than the revolving speed of output end 23 at this time, the pawl 22 on screw type slide unit 25 and output are relayed
Ratchet on end 23 fastens occlusion, and relaying 25 revolving speed of screw type slide unit is synchronous with 23 revolving speed of output end.Spiral is relayed at this time
Relative rotation speed is generated between type slide unit 25 and principal screw type slide unit 26, makes to relay screw type slide unit 25 along servo
Helical spline 27 is advanced to input terminal 24, until on the relaying driving tooth 251 and output end 23 on relaying screw type slide unit 25
Relaying driven tooth 231 engage, keep 26 revolving speed of principal screw type slide unit synchronous with 23 revolving speed of output end.Principal screw type is sliding at this time
Relative rotation speed is generated between dynamic component 26 and input terminal 24, makes principal screw type slide unit 26 along principal screw spline 28 to input terminal
24 advance, until the driving tooth 261 on principal screw type slide unit 26 is engaged with the driven tooth 232 on output end 23, to make defeated
Outlet 23 is synchronous with 24 revolving speed of input terminal.Therefore, which can realize under the revolving speed greater than 700 revs/min and nibble automatically
It closes.
The present embodiment one slides principal screw by agitating the principal screw type slide unit 26 of clutch with a hand lever 29
Component 26 is slided to the direction of clutch input 24, until the driving tooth 261 of clutch and the phase alignment of driven tooth 232 are (such as
Shown in Fig. 4), the engagement of clutch can be realized.Using the method engaged manually, clutch can be made to engage under the low speed, from
And realize gas turbine and steam turbine under the low speed synchronous, it is possible thereby to completely eliminate clutch under the low speed automatic synchronization when
Because output end beats the risk of lock bring clutch damage.
Specifically, the present embodiment one combination circulation steam turbine quick start method of warming up the following steps are included:
Step S1, gas turbine remain static or in revolving speed be lower than turbine speed state.I.e. in initial shape
State, gas turbine and steam turbine are in stationary state or gas turbine and steam turbine and run under lower revolving speed, and
The revolving speed of gas turbine is lower than the revolving speed of steam turbine.
Step S2, the revolving speed of steam turbine is promoted to by n rpm clock by rolling gear of turbine, makes the revolving speed of steam turbine
Surmount the revolving speed of gas turbine.Preferably, n meets: 1≤n≤120.
Step S3, the principal screw slide unit 26 that clutch is agitated with a hand lever 29 makes principal screw type slide unit 26
It is slided to the direction of clutch input 24, until the phase alignment of the driving tooth 261 of clutch and driven tooth 232, realizes clutch
Engagement, that is, gas turbine and steam turbine under the low speed synchronous are realized, it is possible thereby to completely eliminate clutch under the low speed
Because output end beats the risk of lock bring clutch damage when automatic synchronization.
Step S4, rolling gear of turbine dragging steam turbine, generator and gas turbine rotate together.
Step S5, it is passed through warming-up steam into steam turbine, starts warming-up, drives gas turbine and generator to turn by steam turbine
Dynamic, steam turbine drives gas turbine and the revolving speed of generator rotation to be maintained at p revs/min, and meets p > n.Preferably, p is full
Foot: 120≤p≤1000.Since steam turbine bringing onto load is run, so that throttle flow increases, warming-up effect can be enhanced.Preferably,
After starting warming-up, to improve warming-up efficiency, the pressure of condenser in steam-turbine unit can be improved, that is, increase the back of steam turbine
Pressure, back pressure is higher, and the throttle flow of same rotational speed tubine is bigger, and warm-up period is also shorter.Preferably, by condenser
Pressure is controlled in 10KPa-30KPa.Warming-up steam in the present embodiment one can be high row's steam of adjacent unit, be also possible to
The low pressure filling of adjacent unit, is also possible to the heating steam of adjacent unit, is also possible to starting trouble steam.When warming-up steam
Using adjacent unit steam when, by the condensed water foldback generated in the condenser of steam-turbine unit return adjacent unit hot well
In.Before steam turbine cold start red switch, need to carry out warming-up to its high pressure cylinder and intermediate pressure cylinder, therefore, warming-up steam can be divided into two
Road, leads to high pressure cylinder all the way, and another way then leads to intermediate pressure cylinder.The warming-up steam for leading to high pressure cylinder can be in such a way that forward direction be into vapour
From the air intake of high pressure cylinder enter, can also by reversely into vapour in a manner of from the steam drain of high pressure cylinder enter.Lead to intermediate pressure cylinder
Warming-up steam enters in such a way that forward direction is into vapour from the air intake of intermediate pressure cylinder.
Step S6, when the temperature of pressure rotor in steam turbine reaches preset temperature or warm-up period reaches preset time,
Warming-up steam is cut off, terminates warming-up, gas turbine and steam turbine restore to jiggering state.According to the temperature for pressing rotor in steam turbine
Whether preset temperature is reached come when determining whether to terminate warming-up, the preset temperature should be not less than 150 DEG C, it is preferable that this is default
Temperature can carry out selection determination according to live actual condition, for example, the temperature of rotor can be pressed to rise to 150 DEG C in steam turbine
Either 200 DEG C or 300 DEG C when cut off warming-up steam, to terminate warming-up.It is of course also possible to whether be reached according to practical warm-up period
Determine whether to terminate warming-up to preset time, the preset time then carries out selection determination according to live actual condition.
When warming-up terminates, the revolving speed of gas turbine and steam turbine restores to jiggering revolving speed, then can warm state routinely or
Hot starting, hot start mode normally starts combined cycle unit.
The combination circulation steam turbine quick start method of warming up of the present embodiment one, before gas turbine starting, first with
Warming-up steam carries out red switch pre-warm to steam turbine, improves the initial temperature of steam turbine, can make steam turbine load carrying earlier, increases
While peak modulation capacity and generated energy, the time needed for combined cycle unit cold start can be greatly shortened, it is energy saving and
Start-up cost improves the flexibility of unit cold start.
Embodiment two
As shown in Figure 1, embodiment two provides a kind of reality of combination circulation steam turbine quick start warming-up system of the present invention
Apply example.The combination circulation steam turbine quick start warming-up system of the present embodiment two, which can be used for realizing combining described in embodiment one, to be followed
Ring steam turbine quick start method of warming up.
Specifically, the combination circulation steam turbine quick start warming-up system of the present embodiment two includes warming-up vapour source 3 and same
Axis arrangement and sequentially connected gas turbine 1, generator 17, clutch 2 and steam turbine, i.e. one end of 17 shaft of generator and combustion
The rotor axis connection of gas-turbine 1, the other end of 17 shaft of generator then pass through the rotor axis connection of clutch 2 Yu steam turbine.Vapour
Turbine is connect with rolling gear of turbine 18, can drag steam turbine rotation by rolling gear of turbine 18.The present embodiment two
In, gas turbine 1 and steam turbine share the same rolling gear of turbine 18, and the capacity of barring gear 18 should meet can be simultaneously
Steam turbine, generator 17 and gas turbine 1 is dragged to rotate.The capacity of rolling gear of turbine 18 should meet energy in the present embodiment two
Enough while dragging steam turbine, generator 17 and the rotation of gas turbine 1.Steam turbine includes high pressure cylinder HP, intermediate pressure cylinder IP and low pressure (LP) cylinder
LP, the structure that steam turbine can individually divide cylinder, intermediate pressure cylinder IP and low pressure (LP) cylinder LP to close cylinder using high pressure cylinder HP, can also use high pressure
Cylinder HP and intermediate pressure cylinder IP conjunction cylinder, low pressure (LP) cylinder LP individually divide the structure of cylinder.Warming-up vapour source 3, which is connected with, leads to high pressure cylinder HP and intermediate pressure cylinder
The warming-up steam conveying pipe 100 of IP, for being passed through warming-up steam into high pressure cylinder HP and intermediate pressure cylinder IP.Warming-up steam pipeline
Road 100 is equipped with transfer valve 4, for controlling the on-off of warming-up steam conveying pipe 100.The warming-up steam that warming-up vapour source 3 provides
The high row's steam that can be adjacent unit, is also possible to the low pressure filling of adjacent unit, the heat supply for being also possible to adjacent unit is steamed
Vapour is also possible to starting trouble steam.
As shown in figure 3, the clutch 2 used in the present embodiment two includes input terminal 24, output end 23, pawl 22, main spiral shell
Rotation type slide unit 26 and relaying screw type slide unit 25, the rotor axis connection of input terminal 24 and steam turbine, output end 23 and
The shaft of generator 17 connects.Cooperated between input terminal 24 and principal screw type slide unit 26 by principal screw spline 28, main spiral shell
Cooperated between rotation type slide unit 26 and relaying screw type slide unit 25 by servo helical spline 27, when input terminal 24 rotates
Principal screw type slide unit 26 and relaying screw type slide unit 25 is driven to rotate together.The setting of pawl 22 is sliding in relaying screw type
On dynamic component 25, output end 23 is equipped with the ratchet matched with pawl 22.Deserve 24 revolving speed of input terminal greater than 700 revs/min
When, pawl 22 can pop up under the influence of centrifugal force, if the revolving speed of input terminal 24 is greater than the revolving speed of output end 23 at this time, in
It is engaged after the pawl 22 on screw type slide unit 25 with the ratchet fastening on output end 23, relays 25 turns of screw type slide unit
Speed is synchronous with 23 revolving speed of output end.It relays between screw type slide unit 25 and principal screw type slide unit 26 and is generated relatively at this time
Revolving speed makes to relay screw type slide unit 25 along servo helical spline 27 to the traveling of input terminal 24, until relaying screw type sliding part
Relaying driving tooth 251 on part 25 is engaged with the relaying driven tooth 231 on output end 23, makes 26 revolving speed of principal screw type slide unit
It is synchronous with 23 revolving speed of output end.Relative rotation speed is generated between principal screw type slide unit 26 and input terminal 24 at this time, makes principal screw
Type slide unit 26 is advanced along principal screw spline 28 to input terminal 24, until driving tooth 261 on principal screw type slide unit 26 with
Driven tooth 232 on output end 23 engages, to keep output end 23 synchronous with 24 revolving speed of input terminal.Therefore, which can be with
Automatic engagement is realized under the revolving speed greater than 700 revs/min.
The present embodiment two keeps principal screw sliding by agitating the principal screw type slide unit 26 of clutch 2 with a hand lever 29
Dynamic component 26 is slided to the direction of 2 input terminal 24 of clutch, until the phase alignment of the driving tooth 261 of clutch 2 and driven tooth 232
The engagement of clutch 2 can be realized in (as shown in Figure 4).Using the method engaged manually, clutch 2 can be made to nibble under the low speed
It closes, so that gas turbine and steam turbine under the low speed synchronous are realized, it is possible thereby to which it is automatic under the low speed to completely eliminate clutch 2
Because output end beats the risk of the damage of lock bring clutch 2 when synchronous.
The combination circulation steam turbine quick start warming-up system of the present embodiment two, can be before the starting of gas turbine 1, first
Red switch pre-warm is carried out to steam turbine using the warming-up steam that warming-up vapour source 3 provides, the initial temperature of steam turbine is improved, steam turbine can be made
Load carrying earlier can greatly shorten combined cycle unit cold start institute while increasing peak modulation capacity and generated energy
The time needed, energy saving and start-up cost improve the flexibility of unit cold start.
Further, the air intake of high pressure cylinder HP is connected to High Pressure Steam Host Piping 200, and High Pressure Steam Host Piping 200 is used for
High pressure main steam is passed through into high pressure cylinder HP.Motor-operated isolation valve 6 is successively arranged on High Pressure Steam Host Piping 200 from upstream to downstream
With high-pressure admission valve group.High-pressure admission valve group close to high pressure cylinder HP air intake, for adjust enter high pressure cylinder HP in high pressure
The flow of main steam.Preferably, high-pressure admission valve group includes high pressure main stop valve 51 and septum valve 52,51 He of high pressure main stop valve
Septum valve 52 is connected.Motor-operated isolation valve 6 is close to the boiler side of high pressure main steam is provided, for controlling High Pressure Steam Host Piping
200 on-off.In the present embodiment two, warming-up steam conveying pipe 100 is by high-pressure delivery pipeline 101 in 6 He of motor-operated isolation valve
It is connected between high-pressure admission valve group with High Pressure Steam Host Piping 200.When closing motor-operated isolation valve 6, opening high-pressure admission valve group, warm up
Warming-up steam in machine steam conveying pipe 100 can be passed through in High Pressure Steam Host Piping 200 through high-pressure delivery pipeline 101, and
Enter in high pressure cylinder HP through high-pressure admission valve group from the air intake of high pressure cylinder HP in such a way that forward direction is into vapour, the electronic isolation of closing
Valve 6 can then prevent the warming-up steam flow boiler side being passed through in High Pressure Steam Host Piping 200.Certainly, in the present invention, lead to high pressure
The warming-up steam of cylinder HP can also by reversely into vapour in a manner of from the steam drain of high pressure cylinder HP enter.
Preferably, high-pressure stop valve 7 is equipped on high-pressure delivery pipeline 101, for controlling the logical of high-pressure delivery pipeline 101
It is disconnected.Since high-pressure stop valve 7 directly contacts high-temperature steam, for safety, it is preferable that connect on high-pressure delivery pipeline 101
If there are two high-pressure stop valves 7.
The combination circulation steam turbine quick start warming-up system of the present embodiment two further includes reheater 8, the row of high pressure cylinder HP
Steam ports is connected to by high jet chimney 300 of arranging with the entrance of reheater 8, the outlet of reheater 8 pass through in be pressed into steam pipe road 400 and
The air intake of intermediate pressure cylinder IP is connected to.High row's steam of high pressure cylinder HP steam drain discharge is passed through reheater 8 through height row's jet chimney 300
In reheated, the reheat heat steam generated in reheater 8 then pass through in be pressed into steam pipe road 400 and be passed through in intermediate pressure cylinder IP.In height
It arranges jet chimney 300 and is equipped with high exhaust check valve 10, for preventing high row's steam from flowing backwards into high pressure cylinder HP.
In be pressed into steam pipe road 400 be equipped in be pressed into steam valve group, in be pressed into steam valve group close to the air intake of intermediate pressure cylinder IP, use
Enter the reheat heat steam flow in intermediate pressure cylinder IP in adjusting.Preferably, it includes middle pressure stop valve 91 in that steam valve group is pressed into
Press regulating valve 92, middle pressure stop valve 91 and reheat control valve 92 series connection, in be pressed on steam valve group valve casing in middle 91 He of pressure stop valve
Rapid cooling interface 93 is equipped between reheat control valve 92.
In the present embodiment two, warming-up steam conveying pipe 100 by middle pressure conveyance conduit 102 at the rapid cooling interface 93 in
It is pressed into the connection of steam pipe road 400.When pressing stop valve 91 in closing, opening reheat control valve 92, in warming-up steam conveying pipe 100
Warming-up steam can be passed through rapid cooling interface 93 through middle pressure conveyance conduit 102, and through reheat control valve 92 in such a way that forward direction is into vapour
Enter from the air intake of intermediate pressure cylinder IP, the middle pressure stop valve 91 of closing can then prevent pressure stop valve 91 in warming-up steam warp from flowing into
8 side of reheater.
Preferably, middle pressure cutoff valve 11 is equipped on middle pressure conveyance conduit 102, for pressing conveyance conduit 102 in controlling
On-off.Since middle pressure cutoff valve 11 directly contacts high-temperature steam, for safety, it is preferable that gone here and there on middle pressure conveyance conduit 102
Join middle pressure cutoff valve 11 there are two setting.Further, regulating valve is equipped with before middle pressure cutoff valve 11 on middle pressure conveyance conduit 102
12, for accurately controlling the flow into warming-up steam in intermediate pressure cylinder IP.
In addition, the combination circulation steam turbine quick start warming-up system of the present embodiment two further includes condenser 14.In high pressure
It is communicated with high pressure turbine by 500 between main steam line 200 and high row's jet chimney 300, high pressure turbine by 500 is equipped with high pressure turbine by
Valve 13.The intermediate pressure by-pass 600 for being equipped on steam pipe road 400 and being connected to condenser 14 is pressed into, intermediate pressure by-pass 600 is equipped with middle pressure
Bypass valve 15.It is equipped with the air pipeline 700 being connected to condenser 14 before high exhaust check valve 10 on height row's jet chimney 300, leads to
Air pipe line 700 is equipped with ventilation valve 16.
In the present embodiment two, the warming-up steam in warming-up steam conveying pipe 100 is passed through high pressure through high-pressure delivery pipeline 101
In cylinder HP, enters in air pipeline 700 after flowing through high pressure cylinder HP, enter in condenser 14 through ventilation valve 16, thus constitute high pressure
Warm-up circuit.Pressure conveyance conduit 102 is passed through in intermediate pressure cylinder IP in warming-up steam warp in warming-up steam conveying pipe 100, is flowed through
It is discharged into condenser 14 after intermediate pressure cylinder IP and low pressure (LP) cylinder LP, thus presses warm-up circuit in composition.
When warming-up steam uses the steam of adjacent unit, the condensed water foldback generated in condenser 14 is returned into adjacent unit
Hot well in.
The combination circulation steam turbine quick start warming-up system of the present embodiment two realizes combined cycle described in embodiment one
The specific steps of steam turbine quick start method of warming up are as follows:
(1) gas turbine 1 remain static or in revolving speed be lower than turbine speed state.
(2) revolving speed of steam turbine is promoted to by n rpm clock by rolling gear of turbine 18, keeps the revolving speed of steam turbine super
The more revolving speed of gas turbine 1.N meets: 1≤n≤120.Preferably, n=60.Transfer valve 4, high-pressure stop valve 7, regulating valve 12,
Middle pressure cutoff valve 11, motor-operated isolation valve 6, high pressure bypass valve 13, intermediate pressure by-pass valve 15, high exhaust check valve 10, high pressure main stop valve 51,
Septum valve 52, middle pressure stop valve 91 and reheat control valve 92 are turned off, and ventilation valve 16 is opened, unit gland seal system steam supply,
Establish vacuum.
(3) the principal screw slide unit 26 that clutch 2 is agitated with a hand lever 29, make principal screw type slide unit 26 to from
The direction sliding of the input of clutch 2 24, until the phase alignment of the driving tooth 261 of clutch 2 and driven tooth 232, realizes clutch 2
Engagement, keeps gas turbine 1 synchronous with turbine speed.
(4) steam turbine, generator 17 and gas turbine 1 is dragged by rolling gear of turbine 18 to rotate together.
(5) transfer valve 4, high-pressure stop valve 7 are opened, into heating coil, warm valve stage, warm anticyclone inlet valve group.Preferably may be used
To open high pressure main stop valve 51 so that flowing mode is separated, accelerate warm valve.Unlatching can be preferably interrupted in a manner of crawl at this time
Regulating valve 12 and middle pressure cutoff valve 11, it is warm in be pressed into steam valve group.
(6) high pressure main stop valve 51, septum valve 52, regulating valve 12, middle pressure cutoff valve 11 and reheat control valve 92 are opened,
Using septum valve 52, regulating valve 12 and reheat control valve 92 adjust high pressure cylinder HP and intermediate pressure cylinder IP into vapour ratio and into
Vapour amount, makes steam turbine raise speed, and gas turbine 1 and generator 17 is driven to raise speed, and steam turbine is finally made to drive gas turbine 1 and hair
The revolving speed that motor 17 rotates is maintained at p revs/min greater than n rpm clock, starts warming-up.P meets: 120≤p≤1000.It is preferred that
Ground, p=500 or p=800.Further, the pressure of condenser 14 is controlled in 10KPa-30KPa.
(7) it when the temperature of pressure rotor in steam turbine reaches preset temperature or warm-up period reaches preset time, closes
High pressure main stop valve 51, septum valve 52, high-pressure stop valve 7, middle pressure cutoff valve 11 and transfer valve 4 cut off warming-up steam, terminate
Warming-up, gas turbine 1 and steam turbine restore to jiggering state.When the revolving speed of steam turbine is lower than the revolving speed of gas turbine 1, clutch
Device 2 disengages automatically.
When warming-up terminates, the revolving speed of gas turbine 1 and steam turbine restores to jiggering revolving speed, then warm state or heat routinely
State Starting mode normally starts combined cycle unit.
Embodiment three
As shown in Fig. 2, embodiment three provides second of combination circulation steam turbine quick start warming-up system of the present invention
Embodiment.The present embodiment three and embodiment two are essentially identical, and something in common repeats no more, the difference is that, the present embodiment three
In, in be pressed into and be pressed into the upstream of steam valve group on steam pipe road 400 in and be additionally provided with a gate valve 19, warming-up steam conveying pipe 100 is logical
Cross pressure conveyance conduit 102 gate valve 19 and in be pressed between steam valve group and be pressed into steam pipe road 400 in and be connected to.Closing gate valve 19,
When being pressed into steam valve group in unlatching, during the warming-up steam in warming-up steam conveying pipe 100 can be passed through through middle pressure conveyance conduit 102
It is pressed into steam pipe road 400, and is pressed into steam valve group in passing through and enters in such a way that forward direction is into vapour from the air intake of intermediate pressure cylinder IP, flow through
It is discharged into condenser 14 after cylinder pressure IP and low pressure (LP) cylinder LP, warm-up circuit is pressed in composition.The gate valve 19 of closing can then prevent middle pressure
Warming-up steam in steam inlet pipe road 400 flows into 8 side of reheater.
The combination circulation steam turbine quick start warming-up system of the present embodiment three realizes combined cycle described in embodiment one
The specific steps of steam turbine quick start method of warming up are as follows:
(1) gas turbine 1 remain static or in revolving speed be lower than turbine speed state.
(2) revolving speed of steam turbine is promoted to by n rpm clock by rolling gear of turbine 18, keeps the revolving speed of steam turbine super
The more revolving speed of gas turbine 1.N meets: 1≤n≤120.Preferably, n=60.Transfer valve 4, high-pressure stop valve 7, regulating valve 12,
Middle pressure cutoff valve 11, motor-operated isolation valve 6, gate valve 19, high pressure bypass valve 13, intermediate pressure by-pass valve 15, high exhaust check valve 10, high pressure master
Steam valve 51, septum valve 52, middle pressure stop valve 91 and reheat control valve 92 are turned off, and ventilation valve 16 is opened, unit axle envelope system
System steam supply, establishes vacuum.
(3) the principal screw slide unit 26 that clutch 2 is agitated with a hand lever 29, make principal screw type slide unit 26 to from
The direction sliding of the input of clutch 2 24, until the phase alignment of the driving tooth 261 of clutch 2 and driven tooth 232, realizes clutch 2
Engagement, keeps gas turbine 1 synchronous with turbine speed.
(4) steam turbine, generator 17 and gas turbine 1 is dragged by rolling gear of turbine 18 to rotate together.
(5) transfer valve 4, high-pressure stop valve 7, regulating valve 12 and middle pressure cutoff valve 11 are opened, into heating coil, warms up the valve stage,
Warm anticyclone inlet valve group is pressed into steam valve group in.It can be preferably interrupted in a manner of crawl at this time and open 51 He of high pressure main stop valve
Middle pressure stop valve 91, to accelerate warm valve.
(6) high pressure main stop valve 51, septum valve 52, middle pressure stop valve 91 and reheat control valve 92 are opened, high pressure is utilized
Regulating valve 52, regulating valve 12 and reheat control valve 92 adjust high pressure cylinder HP and intermediate pressure cylinder IP into vapour ratio and throttle flow, make
Steam turbine speed-raising, and gas turbine 1 and generator 17 is driven to raise speed, so that steam turbine is driven gas turbine 1 and generator 17
The revolving speed of rotation is maintained at p revs/min greater than n rpm clock, starts warming-up.P meets: 120≤p≤1000.Preferably, p=
500 or p=800.Further, the pressure of condenser 14 is controlled in 10KPa-30KPa.
(7) it when the temperature of pressure rotor in steam turbine reaches preset temperature or warm-up period reaches preset time, closes
High pressure main stop valve 51, septum valve 52, high-pressure stop valve 7, middle pressure stop valve 91, reheat control valve 92, middle pressure cutoff valve 11
With transfer valve 4, warming-up steam is cut off, terminates warming-up, gas turbine 1 and steam turbine restore to jiggering state.When turning for steam turbine
When speed is lower than the revolving speed of gas turbine 1, clutch 2 disengages automatically.
When warming-up terminates, the revolving speed of gas turbine 1 and steam turbine restores to jiggering revolving speed, then warm state or heat routinely
State Starting mode normally starts combined cycle unit.
To sum up, combination circulation steam turbine quick start warming-up system of the invention, can gas turbine 1 starting before,
Red switch pre-warm is carried out to steam turbine first with the warming-up steam that warming-up vapour source 3 provides, the initial temperature of steam turbine is improved, steamer can be made
Machine load carrying earlier can greatly shorten combined cycle unit cold start while increasing peak modulation capacity and generated energy
Required time, energy saving and start-up cost improve the flexibility of unit cold start.Also, using promotion clutch manually
The mode that device 2 engages, can be such that clutch 2 engages under the low speed, to realize gas turbine 1 and steam turbine under the low speed same
Step, it is possible thereby to completely eliminate clutch 2 under the low speed automatic synchronization when because output end beat lock bring clutch 2 damage wind
Danger.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement
Also it should be regarded as protection scope of the present invention.
Claims (16)
1. a kind of combination circulation steam turbine quick start warming-up system, which is characterized in that including warming-up vapour source (3) and coaxial cloth
It sets and sequentially connected gas turbine (1), generator (17), clutch (2) and steam turbine, the gas turbine (1) and described
Steam turbine shares a rolling gear of turbine (18), and the rolling gear of turbine (18) is connect with the steam turbine, institute
Stating steam turbine includes high pressure cylinder (HP), intermediate pressure cylinder (IP) and low pressure (LP) cylinder (LP), and the warming-up vapour source (3), which is connected with, leads to the height
The warming-up steam conveying pipe (100) of cylinder pressure (HP) and medium pressure cylinder (IP).
2. combination circulation steam turbine quick start warming-up system according to claim 1, which is characterized in that the high pressure cylinder
(HP) air intake is connected to High Pressure Steam Host Piping (200), on the High Pressure Steam Host Piping (200) from upstream to downstream according to
Secondary to be equipped with motor-operated isolation valve (6) and high-pressure admission valve group, the warming-up steam conveying pipe (100) passes through high-pressure delivery pipeline
(101) it is connected between the motor-operated isolation valve (6) and the high-pressure admission valve group with the High Pressure Steam Host Piping (200).
3. combination circulation steam turbine quick start warming-up system according to claim 2, which is characterized in that the high pressure is defeated
Sending on pipeline (101) series connection to set, there are two high-pressure stop valve (7).
4. combination circulation steam turbine quick start warming-up system according to claim 1, which is characterized in that further include reheating
The steam drain of device (8), the high pressure cylinder (HP) is connected to by high arrange jet chimney (300) with the entrance of the reheater (8), institute
State reheater (8) outlet pass through in be pressed into steam pipe road (400) and be connected to the air intake of medium pressure cylinder (IP), medium pressure into
Steam pipe road (400) is pressed into steam valve group in being equipped with.
5. combination circulation steam turbine quick start warming-up system according to claim 4, which is characterized in that medium pressure into
It is additionally provided with a gate valve (19) on steam pipe road (400) in the upstream of medium pressure inlet valve group, the warming-up steam conveying pipe
(100) by middle pressure conveyance conduit (102) between the gate valve (19) and medium pressure inlet valve group with medium pressure into vapour
Pipeline (400) connection.
6. combination circulation steam turbine quick start warming-up system according to claim 4, which is characterized in that medium pressure into
Steam valve group includes middle pressure stop valve (91) and reheat control valve (92), medium pressure stop valve (91) and reheat control valve (92) it
Between be equipped with rapid cooling interface (93), the warming-up steam conveying pipe (100) by middle pressure conveyance conduit (102) in the fast cold joint
It is connected at mouth (93) with medium pressure steam inlet pipe road (400).
7. combination circulation steam turbine quick start warming-up system according to claim 5 or 6, which is characterized in that in described
It is connected there are two setting middle pressure cutoff valve (11) in pressure conveyance conduit (102).
8. combination circulation steam turbine quick start warming-up system according to claim 7, which is characterized in that medium pressure is defeated
It send and is additionally provided with regulating valve (12) in the upstream of two medium pressure shut-off valves (11) on pipeline (102).
9. a kind of combination circulation steam turbine quick start method of warming up, which comprises the following steps:
Step S1, gas turbine remain static or in revolving speed be lower than turbine speed state；
Step S2, the revolving speed of steam turbine is promoted to by n rpm clock by rolling gear of turbine；
Step S3, the principal screw type slide unit that clutch is agitated with a hand lever, makes principal screw type slide unit to clutch
The direction of input terminal is slided, until the phase alignment of the driving tooth of clutch and driven tooth, realizes the engagement of clutch；
Step S4, rolling gear of turbine dragging steam turbine, generator and gas turbine rotate together；
Step S5, it is passed through warming-up steam into steam turbine, starts warming-up, drives gas turbine and generator to rotate by steam turbine,
Steam turbine drives gas turbine and the revolving speed of generator rotation to be maintained at p revs/min, and meets p > n；
Step S6, when the temperature of pressure rotor in steam turbine reaches preset temperature or warm-up period reaches preset time, cutting
Warming-up steam terminates warming-up, and gas turbine and steam turbine restore to jiggering state.
10. combination circulation steam turbine quick start method of warming up according to claim 9, which is characterized in that in the step
In rapid S2, n meets: 1≤n≤120.
11. combination circulation steam turbine quick start method of warming up according to claim 9, which is characterized in that in the step
In rapid S5, p meets: 120≤p≤1000.
12. combination circulation steam turbine quick start method of warming up according to claim 9, which is characterized in that in the step
In rapid S5, the warming-up steam is that the low pressure filling of high row's steam or adjacent unit of adjacent unit or the heat supply of adjacent unit are steamed
Vapour or starting trouble steam.
13. combination circulation steam turbine quick start method of warming up according to claim 12, which is characterized in that when described warm
When machine steam uses the steam of adjacent unit, the condensed water foldback generated in the condenser of steam-turbine unit is returned into adjacent unit
In hot well.
14. combination circulation steam turbine quick start method of warming up according to claim 9, which is characterized in that in the step
In rapid S5, after starting warming-up, the pressure of condenser in steam-turbine unit is improved.
15. combination circulation steam turbine quick start method of warming up according to claim 14, which is characterized in that in the step
In rapid S5, the pressure of condenser is controlled in 10KPa-30KPa.
16. combination circulation steam turbine quick start method of warming up according to claim 9, which is characterized in that in the step
In rapid S6, the preset temperature is not less than 150 DEG C.
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| CN110242416A (en) * | 2019-05-28 | 2019-09-17 | 浙江浙能技术研究院有限公司 | A method of extending generator life by optimizing the uniaxial combined cycle unit jiggering time |
| CN111255536B (en) * | 2020-01-22 | 2022-08-30 | 中国能源建设集团广东省电力设计研究院有限公司 | FCB operation method of gas-steam unit power plant |
| CN113431684B (en) * | 2021-06-18 | 2022-08-30 | 湖北华电武昌热电有限公司 | Control method, device and equipment for gas circulating unit and storage medium |
| CN114876591B (en) * | 2022-06-20 | 2024-01-23 | 华能山东石岛湾核电有限公司 | Auxiliary system and method for steam turbine warm-up |
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