CN106401657A - Coaxially arranged steam turbine optimizing configuration system and method - Google Patents
Coaxially arranged steam turbine optimizing configuration system and method Download PDFInfo
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- CN106401657A CN106401657A CN201611058388.6A CN201611058388A CN106401657A CN 106401657 A CN106401657 A CN 106401657A CN 201611058388 A CN201611058388 A CN 201611058388A CN 106401657 A CN106401657 A CN 106401657A
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- cylinder
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- pressure
- preposition
- attachment means
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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
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
Abstract
The invention discloses a coaxially arranged steam turbine optimizing configuration system and a method. The system at least comprises front-end low pressure cylinders, connecting devices, a low pressure cylinder, an electric generator, and a communicating pipe connecting the steam inlet of the low pressure cylinder and the steam inlets of the front-end low pressure cylinders, which are arranged coaxially. The low pressure cylinder and the electric generator are arranged on one sides of the connecting devices; and the front-end low pressure cylinders are arranged on the other sides of the connecting devices. According to the unit load, the backpressure and the configuration quantity of the front-end low pressure cylinders, through controlling commissioning or reducing the quantity of the front-end low pressure cylinders, a unit can maintain lower chocking back pressure in the winter working condition, especially in the high-load working condition, and can maintain lower leaving-velocity loss of the low pressure cylinder in the summer working condition, especially in the low-load operation, so that the optimum of the all-season full-load operation condition is realized, and the aims of energy conservation and consumption reduction are achieved.
Description
Technical field
The present invention relates to a kind of coaxially arranged Optimization of Steam Turbine configuration system and method, belong to thermal power generation field.
Background technology
In recent years, China its people electricity consumption total amount increases rapidly, and the diversity of customer charge is more obvious, causes electrical network peak
Paddy difference is increased dramatically, and in order to ensure safe power supply and the quality of power supply of electrical network, in power system total installation of generating capacity, accounting is higher
Fossil-fired unit have to the main force of peak regulation that bears the responsibility, and Large-scale fire-electricity unit is in that to run compared with low load stage be normal
State.
Under design conditions, the through-flow of steam turbine can keep optimum efficiency to general steam turbine, once and off-design operating mode,
Such as summer condition, because circulating water temperature is high, unit back pressuce is high, and the volume flow of low pressure (LP) cylinder steam discharge is remarkably decreased, and leads to remaining
Speed loss rises.Especially unit is in underrun operating mode again, then the volume flow of actual low pressure (LP) cylinder steam discharge designs relatively
Seriously on the low side for operating mode, thus leading to the steam discharge leaving loss of low pressure (LP) cylinder to be relatively substantially increased, efficiency is remarkably decreased.Equally
, operating mode in the winter time, often during unit heavy-duty service, the leaving area of low pressure (LP) cylinder is again not enough, causes back pressure obstructing problem, leads
Cause the effective enthalpy drop of low pressure (LP) cylinder not enough, thus affecting the economy of unit.The design of existing large-scale thermal power steam turbine, often for
Take into account the average behavior of whole year, its design conditions is all to be designed according to average back pressure, and the summer of off-design operating mode
Season and winter also would have to sacrifice certain economy, otherwise, if pressing winter condition design, summer condition can be led to run more
Plus substantial deviation optimum condition, efficiency is lower；In the same manner, if pressing summer condition design, low pressure (LP) cylinder to winter condition will be serious
Block, have a strong impact on the effectively utilizes of low back pressure.
At present, the low pressure (LP) cylinder generally 1 ~ 3 of existing Large-scale machine set configuration, unit capacity is bigger or design back-pressure is lower,
The quantity of low pressure (LP) cylinder also can be more, and this is due to being limited by existing low pressure (LP) cylinder final blade length, for increasing low pressure (LP) cylinder steam discharge face
Long-pending, also will adopt more low pressure (LP) cylinders, for current turbine making factory, usual shafting is according to high, medium and low cylinder pressure
Order is arranged, if exemplary configurations are as shown in figure 1, the quantity of cylinder is more, still takes single shaft to design taking two low pressure (LP) cylinders as a example,
Swollen difference between flow passage component sound is excessive, becomes a significant obstacle, and therefore, most of turbine making factories at present, when low
When cylinder pressure quantity is more, when shafting is longer, in order to avoid swollen difference this problem excessive, just can only take twin shaft design, certainly this
Rising and the other problems of investment can be brought again.
It is to guarantee that the optimum of design conditions is difficult to take into account other operating modes, such as summer in view of above-mentioned existing Design of Steam Turbine
Season performing low-load running of machine set operating mode or winter unit oepration at full load operating mode, and multi-cylinder turbine is using conventional shaft system arrangement
The problems such as differential expansion that brought is excessive, therefore, what those skilled in the art was devoted to developing a kind of Optimization of Steam Turbine configuration is
System and method, can make the gap between low pressure (LP) cylinder sound can be made less, thus under the conditions of existing single shaft designing technique, making
Obtain the design of Large-scale machine set multiple cylinder single shaft feasible or more reasonable, and also can therefore obtain higher steam end efficiency, also may be used simultaneously
Realize unit high load capacity operating mode in the winter time and can keep relatively low obstruction back pressure, and in summer performing low-load running of machine set operating mode, and
Higher operational efficiency can be kept, realize full season, the optimum of full load operating condition, reach energy-saving purpose.
Content of the invention
For achieving the above object, the invention provides a kind of coaxially arranged Optimization of Steam Turbine configures system, its feature exists
In described system includes coaxially arranged preposition low pressure (LP) cylinder, attachment means, low pressure (LP) cylinder and generator, and connects described low pressure
Cylinder admission end and the cross over pipe of described preposition low pressure (LP) cylinder admission end, described low pressure (LP) cylinder is arranged in the side of described attachment means,
Described preposition low pressure (LP) cylinder is arranged in the opposite side of described attachment means.
Wherein, described attachment means can be clutch system（Described clutch system, can be single safety coupling,
Or single clutch, or the mode that combines with clutch of safety coupling etc.）Or shaft coupling.
Further, also include intermediate pressure cylinder, medium pressure cylinder and described low pressure (LP) cylinder and described generator arrangements are in homonymy.
Further, also include high pressure cylinder, described high pressure cylinder and medium pressure cylinder, described low pressure (LP) cylinder and described generator cloth
Put in homonymy.
Alternatively, also include high pressure cylinder, described high pressure cylinder and medium pressure cylinder are combined into high, middle pressing cylinder, described high, in
Pressing cylinder is with described low pressure (LP) cylinder, described generator arrangements in homonymy.
Further, described system also includes valve, the described cross over pipe of described preposition low pressure (LP) cylinder admission end is arranged to
A few valve.
When described preposition low pressure (LP) cylinder is 1, corresponding described attachment means are 1, and one end of described attachment means is even
Connect described preposition low pressure (LP) cylinder, the other end of described attachment means then connects and at least includes described low pressure (LP) cylinder and described generator.
Further, the described cross over pipe connecting described preposition low pressure (LP) cylinder admission end arranges at least one valve.When having intermediate pressure cylinder
When, then medium pressure cylinder and described low pressure (LP) cylinder and described generator arrangements are in homonymy.
When described preposition low pressure (LP) cylinder is multiple, corresponding described attachment means are also multiple.Connect described in shafting outermost
Preposition low pressure (LP) cylinder described in the corresponding outermost of connection device, the other end of the described attachment means in inner side then connect at least include described low
Cylinder pressure and described generator.Further, the described cross over pipe connecting described preposition low pressure (LP) cylinder admission end arranges at least one
Individual valve.When having intermediate pressure cylinder, then medium pressure cylinder and described low pressure (LP) cylinder and described generator arrangements are in homonymy.
When having high pressure cylinder, described high pressure cylinder and medium pressure cylinder, described low pressure (LP) cylinder, described generator arrangements are same
Side, and also include the form of high pressure cylinder and intermediate pressure cylinder conjunction cylinder.
It should be noted that, whether close cylinder, connect according to intermediate pressure cylinder quantity, low pressure (LP) cylinder quantity, preposition low pressure (LP) cylinder quantity, high pressure
Connection device form etc. has a various arrangement combination, any different permutation and combination methods being carried out based on the said equipment, all
Should be in the protection domain being defined in the patent claims.
The invention also discloses a kind of using method of system as above, be can determine that specifically according to unit real time execution load
Low pressure (LP) cylinder total steam discharge mass flow, in conjunction with unit real time execution back pressure, can get low pressure (LP) cylinder total steam discharge volume flow in real time, so
Configuration quantity according to the preposition low pressure (LP) cylinder of unit afterwards, relatively all put into preposition low pressure (LP) cylinder, one preposition low pressure (LP) cylinder of excision and
Excise the unit economy under multiple preposition low pressure (LP) cylinders, selected according to unit economy optimum operating condition.
When low pressure (LP) cylinder, total steam discharge volume flow is less than or equal to " first threshold " in real time（First threshold is according to low pressure (LP) cylinder and front
Set low configuration quantity and real-time low pressure (LP) cylinder total steam discharge volume flow of cylinder pressure, when the outermost preposition low pressure (LP) cylinder of excision
When, unit heat consumption is optimal）When, then close the described valve connecting the outermost described preposition low pressure (LP) cylinder of its center shafting, with
Attachment means described in the corresponding outermost of Shi Liyong excise the preposition low pressure (LP) cylinder of corresponding described outermost；
When low pressure (LP) cylinder, total steam discharge volume flow is less than or equal to " Second Threshold " in real time（Second Threshold is less than first threshold, the second threshold
Value is the configuration quantity and real-time low pressure (LP) cylinder total steam discharge volume flow according to low pressure (LP) cylinder and preposition low pressure (LP) cylinder, when excision two
During preposition low pressure (LP) cylinder, unit heat consumption is optimal）When, then close the described valve connecting another described preposition low pressure (LP) cylinder, simultaneously profit
Excise corresponding described preposition low pressure (LP) cylinder with corresponding described attachment means；
With the decline of low pressure (LP) cylinder total steam discharge volume flow in real time, according to economic optimum, close one by one connect described before set low
The described valve of cylinder pressure, utilizes corresponding described attachment means to excise corresponding described preposition low pressure (LP) cylinder, until cutting simultaneously one by one
Except whole preposition low pressure (LP) cylinders.
Conversely, then progressively starting to connect the described valve of the described preposition low pressure (LP) cylinder in inner side from inner side, to utilize right simultaneously
The described attachment means answered connect corresponding described preposition low pressure (LP) cylinder, until connecting whole preposition low pressure (LP) cylinders.
It should be noted that, different unit operation loads and back pressure correspond to different low pressure (LP) cylinders total steam discharge volume flow,
Under different low pressure (LP) cylinder total steam discharge volume flow operating modes, preposition low pressure (LP) cylinder excises the heat consumption that quantity directly affects unit.Above-mentioned
The different threshold values setting for low pressure (LP) cylinder total steam discharge volume flow and preposition low pressure (LP) cylinder excision quantity, are for determining not
It is ensured that excising or putting into reasonably preposition low pressure (LP) cylinder, to realize low pressure (LP) cylinder under same low pressure (LP) cylinder total steam discharge volume flow operating mode
Leaving loss is minimum or blocks that back pressure is minimum, unit economy is optimum.
And attachment means either adopt clutch system or shaft coupling, all can achieve excision or linkage function, simply from
Clutch system can achieve excision or the connection of unit on-line operation, and shaft coupling then need to be excised in the compressor emergency shutdown stage or be connected
Connect.
Steam turbine Optimizing Configuration System of the present invention and method can obtain following technique effect：
1st, because wherein preposition low pressure (LP) cylinder and remaining low pressure (LP) cylinder are arranged in both sides, therefore, relative between cylinder and rotor
The difference expanding（Referred to as swollen difference）Can be less, that is, the gap between low pressure (LP) cylinder sound can be made less, thus existing single shaft design
So that the design of Large-scale machine set multiple cylinder single shaft is feasible or more reasonable under technical conditions, and also can therefore obtain higher vapour
Cylinder efficiency.
2nd, low pressure (LP) cylinder and preposition low pressure (LP) cylinder are contemplated that enough leaving areas in design, when meeting winter high load capacity operating mode
The demand of relatively low exhaust steam pressure, and the reduction with unit back pressuce rising and load, that is, with low pressure (LP) cylinder steam discharge total measurement (volume) stream
The reduction of amount, then can progressively excise a number of preposition low pressure (LP) cylinder, so that the steam flow of entrance residue low pressure (LP) cylinder is relatively lifted,
Thus reducing low pressure (LP) cylinder steam discharge leaving loss, realize unit economy optimum.
Even if 3 when preposition low pressure (LP) cylinder puts into operation, before being entered by cross over pipe is in parallel respectively due to the steam discharge of intermediate pressure cylinder
Set low cylinder pressure and remaining low pressure (LP) cylinder, therefore, the drag losses of cross over pipe also can be lower, and unit economy also can be therefore more excellent.
Technique effect below with reference to design, concrete structure and generation to the present invention for the accompanying drawing is described further, with abundant
Ground understands the purpose of the present invention, feature and effect.
Brief description
Fig. 1 is a certain system schematic being provided without the present invention program.
Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Figure 15, figure
16th, Figure 17, Figure 18 are the system schematic of the specific embodiment of the present invention；
In figure marks：1-- high pressure cylinder；2-- intermediate pressure cylinder；3-- low pressure (LP) cylinder；4th, the preposition low pressure (LP) cylinder of 6--；5-- generator；7th, 12-- connects
Connection device；8th, 11-- valve；9-- cross over pipe；10-- is high, middle pressing cylinder.
Specific embodiment
Embodiment 1
As shown in Fig. 2 a kind of coaxially arranged Optimization of Steam Turbine that it is the present invention configures the first concrete reality of system and method
Apply example.It mainly includes a coaxially connected high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder, a preposition low pressure (LP) cylinder and
Individual generator, attachment means, valve and mesolow cross over pipe.
The control mode of preposition low pressure (LP) cylinder switching：
1st, when attachment means select clutch system, the switching of its preposition low pressure (LP) cylinder is more flexible, can achieve online switching, but its
Cost is of a relatively high, and the reliability of clutch system itself can affect the security of whole system.Its preposition low pressure (LP) cylinder is thrown
The control mode cut：
According to the real-time operating load of unit and real-time run back pressure it may be determined that real-time low pressure (LP) cylinder total steam discharge volume flow
Amount, when real-time low pressure (LP) cylinder total steam discharge volume flow is less than or equal to " first threshold ", then closes valve 8, simultaneously switches off clutch
Device system 7, thus excising preposition low pressure (LP) cylinder 4 so that the leaving loss of low pressure (LP) cylinder 3 is able to relative reduction, realizes unit economy
Optimum.Contrary, then opening valve 8, be simultaneously connected with clutch system 7, thus putting into preposition low pressure (LP) cylinder 4, making low pressure (LP) cylinder have foot
Enough leaving areas, realize unit economy optimum.
Wherein, the rated output power of preposition low pressure (LP) cylinder 3 may be designed as the rated output power of low pressure (LP) cylinder 4 50% ~
100%, taking 50% as a example, 1000MW unit operation, in 500MW operating mode, after applying this invention, that is, excises preposition low pressure (LP) cylinder 3, then
The leaving loss of low pressure (LP) cylinder 4 can significantly reduce, and internal efficiency can improve 4% about relatively, and meanwhile, unit load is lower, and back pressure is got over
Height, then low pressure (LP) cylinder total steam discharge volume flow is lower, and the Relative system error implementing the present invention is then bigger.
2nd, when attachment means select shaft coupling, its cost is relatively low, safe, but the switching of preposition low pressure (LP) cylinder cannot
Unit operation is realized, can only operate after unit outage, underaction.The control mode of preposition low pressure (LP) cylinder switching：
After unit outage, predict the average back pressure during operation of unit next stage and average load, that is, average low pressure (LP) cylinder always holds
Long-pending exhaust steam flow, if excising the unit heat consumption of preposition low pressure (LP) cylinder more preferably, closing valve 8, simultaneously switching off shaft coupling 7, thus cutting
Except preposition low pressure (LP) cylinder 4 so that the leaving loss of low pressure (LP) cylinder 3 is relative reduction in general, realize unit economy optimum.
Contrary, according to average low pressure (LP) cylinder total measurement (volume) exhaust steam flow, if putting into the unit heat consumption of preposition low pressure (LP) cylinder more preferably,
Then open valve 8, be simultaneously connected with shaft coupling 7, make low pressure (LP) cylinder have enough total leaving areas, realize unit economy optimum.
Embodiment 2
Fig. 3 is second specific embodiment of the present invention.It mainly include a coaxially connected high pressure cylinder, intermediate pressure cylinder, two
Individual low pressure (LP) cylinder, a preposition low pressure (LP) cylinder and a generator, attachment means, valve and mesolow cross over pipe.Compare embodiment
One, increased a low pressure (LP) cylinder, supporting can be applied to the lower unit needing lower exhaust steam pressure of environment temperature, its attachment means
From and preposition low pressure (LP) cylinder switching control method all identical with embodiment one, here is omitted.
Embodiment 3
Fig. 4 is the 3rd specific embodiment of the present invention.It mainly include coaxially connected two intermediate pressure cylinder, two low pressure (LP) cylinders, one
Individual preposition low pressure (LP) cylinder and a generator, attachment means, valve and mesolow cross over pipe.Embodiment one and embodiment relatively
Two, this programme main distinction is to be not provided with high pressure cylinder, therefore supporting can be applied to the low pressure shafting of double reheat twin shaft unit, its
The switching control method of the selection of attachment means and preposition low pressure (LP) cylinder is all identical with embodiment one, and here is omitted.
Embodiment 4
Fig. 5 is the 4th specific embodiment of the present invention.It mainly include coaxially connected two intermediate pressure cylinder, three low pressure (LP) cylinders, one
Individual preposition low pressure (LP) cylinder and a generator, attachment means, valve and mesolow cross over pipe.Compare embodiment three, increased one
For individual low pressure (LP) cylinder, relatively embodiment three, the program is applicable to the lower unit needing lower exhaust steam pressure of environment temperature,
The switching control method of the selection of its attachment means and preposition low pressure (LP) cylinder is all identical with embodiment one, and here is omitted.
Embodiment 5
Fig. 6 is the 5th specific embodiment of the present invention.It mainly includes a coaxially connected HP-IP combined casing, two low pressure
Cylinder, a preposition low pressure (LP) cylinder and a generator, attachment means, valve and mesolow cross over pipe.Its attachment means from and
The switching control method of preposition low pressure (LP) cylinder is all identical with embodiment two, thus here is omitted.This programme and embodiment two
The high intermediate pressure cylinder differring primarily in that this programme close cylinder, thus supporting applicable unit parameter is different.
Embodiment 6
Fig. 7 is the 6th specific embodiment of the present invention.It mainly includes a coaxially connected HP-IP combined casing, a low pressure
Cylinder, a preposition low pressure (LP) cylinder and a generator, attachment means, valve and mesolow cross over pipe.Compare embodiment five, reduce
One low pressure (LP) cylinder, thus comparatively it is adaptable to the higher unit of the of a relatively high required exhaust steam pressure of environment temperature, its connection
The switching control method of the selection of device and preposition low pressure (LP) cylinder is all identical with embodiment one, and here is omitted.
Embodiment 7
Fig. 8 is the 7th specific embodiment of the present invention.It mainly include a coaxially connected high pressure cylinder, intermediate pressure cylinder, one
Individual low pressure (LP) cylinder, two preposition low pressure (LP) cylinders and a generator, attachment means, valve and mesolow cross over pipe.
The control mode of preposition low pressure (LP) cylinder switching：
1st, when attachment means select clutch system, the switching of its preposition low pressure (LP) cylinder is more flexible, can achieve online switching, but its
Cost is of a relatively high, and the reliability of clutch system itself can affect the security of whole system.Its preposition low pressure (LP) cylinder is thrown
The control mode cut：
When real-time low pressure (LP) cylinder total steam discharge volume flow is less than or equal to " first threshold ", then closes valve 11, simultaneously switch off
Attachment means 12, thus excising preposition low pressure (LP) cylinder 6, so, the leaving loss of low pressure (LP) cylinder 3 can significantly reduce, and realizes Unit Economic
Property optimum under this operating mode.
When real-time low pressure (LP) cylinder total steam discharge volume flow is less than or equal to " Second Threshold ", then it is further turned off valve 8,
Simultaneously switch off attachment means 7, thus excising preposition low pressure (LP) cylinder 4, so, the leaving loss of low pressure (LP) cylinder 3 can therefore significantly reduce, real
Existing unit economy is optimum under this operating mode.
Conversely, then when real-time low pressure (LP) cylinder total steam discharge volume flow is more than " Second Threshold " and less than " first threshold ",
Then open valve 8, UNICOM's attachment means 7, put into preposition low pressure (LP) cylinder 4, be more than when real-time low pressure (LP) cylinder total steam discharge volume flow " the
During one threshold value ", then opening valve 11 further, simultaneously UNICOM's attachment means 12, thus putting into preposition low pressure (LP) cylinder 6 further, making
Obtain low pressure (LP) cylinder and there is enough total leaving areas, realize unit economy optimum.
2nd, when attachment means select shaft coupling, its cost is relatively low, safe, but the switching of preposition low pressure (LP) cylinder cannot
Unit operation is realized, can only operate after unit outage, underaction.Its control mode and preposition low pressure (LP) cylinder switching side
Formula：
After unit outage, predict the average load during operation of unit next stage and average back pressure, obtain average low pressures cylinder steam discharge
Volume flow.If average low pressures cylinder steam discharge volume flow is less than or equal to " first threshold ", closes valve 11, simultaneously switch off
Attachment means 12, thus excising preposition low pressure (LP) cylinder 6 so that the leaving loss of low pressure (LP) cylinder 3 reduces, realize this operating mode of unit economy
Lower optimum.
If average low pressures cylinder steam discharge volume flow is less than or equal to " Second Threshold ", it is further turned off valve 8, simultaneously
Disconnect device 7, thus excising preposition low pressure (LP) cylinder 4 further so that the leaving loss of low pressure (LP) cylinder 3 is able to relative reduction, real
Optimum under existing this operating mode of unit economy.
If conversely, when average low pressures cylinder steam discharge volume flow is more than " Second Threshold " and is less than " first threshold ", opening
Valve 8, UNICOM's attachment means 7, put into preposition low pressure (LP) cylinder 4；If average low pressures cylinder steam discharge volume flow is more than " first threshold ",
Then open valve 11 further, simultaneously UNICOM's attachment means 12, thus putting into preposition low pressure (LP) cylinder 6 further so that low pressure (LP) cylinder has
There are enough total leaving areas, realize unit economy optimum.
Compare embodiment one, which increase a preposition low pressure (LP) cylinder, therefore the flexibility of the preposition low pressure (LP) cylinder of its switching is higher,
Economy after switching also can be more excellent.
Embodiment 8
Fig. 9 is the 8th specific embodiment of the present invention.It mainly include a coaxially connected high pressure cylinder, intermediate pressure cylinder, two
Individual low pressure (LP) cylinder, two preposition low pressure (LP) cylinders and a generator, attachment means, valve and mesolow cross over pipe.Compare embodiment
Two, which increase a preposition low pressure (LP) cylinder, therefore the flexibility of the preposition low pressure (LP) cylinder of its switching is higher, the economy after switching also can be more
Excellent.The switching control method of the selection of its attachment means and preposition low pressure (LP) cylinder is all identical with embodiment seven, and here is omitted.
Embodiment 9
Figure 10 is the 9th specific embodiment of the present invention.It mainly include coaxially connected two intermediate pressure cylinder, two low pressure (LP) cylinders, two
Individual preposition low pressure (LP) cylinder and a generator, attachment means, valve and mesolow cross over pipe.Compare embodiment three, which increase
One preposition low pressure (LP) cylinder, therefore the flexibility of the preposition low pressure (LP) cylinder of its switching is higher, the economy after switching also can be more excellent.It connects dress
The selection put and the switching control method of preposition low pressure (LP) cylinder are all identical with embodiment seven, and here is omitted.
Embodiment 10
Figure 11 is the tenth specific embodiment of the present invention.It mainly include coaxially connected two intermediate pressure cylinder, three low pressure (LP) cylinders, two
Individual preposition low pressure (LP) cylinder and a generator, attachment means, valve and mesolow cross over pipe.Compare embodiment four, which increase
One preposition low pressure (LP) cylinder, therefore the flexibility of the preposition low pressure (LP) cylinder of its switching is higher, the economy after switching also can be more excellent.It connects dress
The selection put and the switching control method of preposition low pressure (LP) cylinder are all identical with embodiment seven, and here is omitted.
Embodiment 11
Figure 12 is the 11st specific embodiment of the present invention.It mainly include a coaxially connected HP-IP combined casing, two low
Cylinder pressure, two preposition low pressure (LP) cylinders and a generator, attachment means, valve and mesolow cross over pipe.Compare embodiment five, its
Increased a preposition low pressure (LP) cylinder, therefore the flexibility of the preposition low pressure (LP) cylinder of its switching is higher, the economy after switching also can be more excellent.Its
The switching control method of the selection of attachment means and preposition low pressure (LP) cylinder is all identical with embodiment seven, and here is omitted.
Embodiment 12
Figure 13 is the 12nd specific embodiment of the present invention.It mainly include a coaxially connected HP-IP combined casing, one low
Cylinder pressure, two preposition low pressure (LP) cylinders and a generator, attachment means, valve and mesolow cross over pipe.Compare embodiment six, its
Increased a preposition low pressure (LP) cylinder, therefore the flexibility of the preposition low pressure (LP) cylinder of its switching is higher, the economy after switching also can be more excellent.Its
The switching control method of the selection of attachment means and preposition low pressure (LP) cylinder is all identical with embodiment seven, and here is omitted.
Embodiment 13
Figure 14 is the 13rd specific embodiment of the present invention.It mainly includes a coaxially connected low pressure (LP) cylinder, sets low before one
Cylinder pressure and a generator, attachment means, valve and cross over pipe.Compare embodiment one, no high on the shaft arrangement of the program
Cylinder pressure and intermediate pressure cylinder, and only low pressure (LP) cylinder, the selection of its attachment means and the switching control method of preposition low pressure (LP) cylinder all and are implemented
Example one is identical, and here is omitted.
Embodiment 14
Figure 15 is the 14th specific embodiment of the present invention.It mainly includes a coaxially connected low pressure (LP) cylinder, sets low before two
Cylinder pressure and a generator, attachment means, valve and cross over pipe.Compare embodiment 13, many on the shaft arrangement of the program
One preposition low pressure (LP) cylinder, the therefore power output of this shafting are relatively big, further, since preposition low pressure (LP) cylinder quantity is relatively many, because
Comparatively this it can be ensured that the total leaving area of enough low pressure (LP) cylinders, can make the flexibility of preposition low pressure (LP) cylinder switching more simultaneously again
Greatly, therefore overall operation economy is relatively more excellent.Additionally, for relative embodiment seven, shaft arrangement has lacked a high pressure
Cylinder and an intermediate pressure cylinder, its attachment means from and preposition low pressure (LP) cylinder switching control method then all with embodiment seven phase
With here is omitted.
Embodiment 15
Figure 16 is the 15th specific embodiment of the present invention.It mainly includes coaxially connected two low pressure (LP) cylinder, sets low before one
Cylinder pressure and a generator, attachment means, valve and cross over pipe.Compare embodiment 13, many on the shaft arrangement of the program
One low pressure (LP) cylinder, the therefore power output of this shafting are relatively big, its attachment means from and preposition low pressure (LP) cylinder switching control
Method processed is then all identical with embodiment 13, and here is omitted.
Embodiment 16
Figure 17 is the 16th specific embodiment of the present invention.It mainly includes coaxially connected two low pressure (LP) cylinder, sets low before two
Cylinder pressure and a generator, attachment means, valve and cross over pipe.Compare embodiment 14, many on the shaft arrangement of the program
One low pressure (LP) cylinder, the therefore power output of this shafting are relatively big, its attachment means from and preposition low pressure (LP) cylinder switching control
Method processed is then all identical with embodiment 14, and here is omitted.
Embodiment 17
Figure 18 is the 17th specific embodiment of the present invention.It mainly includes coaxially connected three low pressure (LP) cylinder, sets low before one
Cylinder pressure and a generator, attachment means, valve and cross over pipe.Compare embodiment 15, many on the shaft arrangement of the program
One low pressure (LP) cylinder, the therefore power output of this shafting can be relatively bigger, and because low pressure (LP) cylinder quantity is many, total leaving area is big,
Therefore it is applicable to the unit having under relatively low back pressure environment.The selection of its attachment means and the switching controlling party of preposition low pressure (LP) cylinder
Rule is all identical with embodiment 15, and here is omitted.
The preferred embodiment of the present invention described in detail above.It should be appreciated that the ordinary skill of this area need not be created
The property made work just can make many modifications and variations according to the design of the present invention.Therefore, all technical staff in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment under this invention's idea on the basis of existing technology
Scheme, all should be in the protection domain being defined in the patent claims.
Claims (9)
1. kind of coaxially arranged Optimization of Steam Turbine configuration system it is characterised in that described system include coaxially arranged before set low
Cylinder pressure, attachment means, low pressure (LP) cylinder and generator, and connect described low pressure (LP) cylinder admission end and described preposition low pressure (LP) cylinder admission end
Cross over pipe, described low pressure (LP) cylinder is arranged in the side of described attachment means, and described preposition low pressure (LP) cylinder is arranged in described attachment means
Opposite side.
2. the system described in claim 1 is it is characterised in that also include intermediate pressure cylinder, medium pressure cylinder and described low pressure (LP) cylinder and institute
State generator arrangements in homonymy.
3. system as claimed in claim 2 is it is characterised in that also include high pressure cylinder, described high pressure cylinder and medium pressure cylinder, institute
State low pressure (LP) cylinder and described generator arrangements in homonymy.
4. system as claimed in claim 2 is it is characterised in that also include high pressure cylinder, described high pressure cylinder and medium pressure cylinder group
Synthesize high, middle pressing cylinder, described high, middle pressing cylinder is with described low pressure (LP) cylinder, described generator arrangements in homonymy.
5. described system as arbitrary in claim 1-4 is it is characterised in that described system also includes valve, described preposition low pressure
At least one valve is arranged on the described cross over pipe of cylinder admission end.
6. the system as claimed in claim 1 is it is characterised in that described attachment means are clutch system or shaft coupling.
7. a kind of using method of system as claimed in claim 5, including step a:Determined according to unit real time execution load
Specific low pressure (LP) cylinder total steam discharge mass flow, then according to unit real time execution back pressure, determines low pressure (LP) cylinder total steam discharge volume in real time
Flow.
8. a kind of using method of system as claimed in claim 7, including step b:When low pressure (LP) cylinder total steam discharge volume flow in real time
When amount is less than or equal to " first threshold ", then close the described valve connecting the outermost described preposition low pressure (LP) cylinder of its center shafting
Door, utilizes attachment means described in corresponding outermost to excise the preposition low pressure (LP) cylinder of corresponding described outermost simultaneously.
9. the using method of system as claimed in claim 8, including step c:When low pressure (LP) cylinder, total steam discharge volume flow is little in real time
In equal to " Second Threshold "（Second Threshold is less than first threshold, and Second Threshold is configuration quantity according to low pressure (LP) cylinder and in real time
Low pressure (LP) cylinder total steam discharge volume flow, when excise two preposition low pressure (LP) cylinders when, unit heat consumption is optimal）When, then close connection another
The described valve of individual described preposition low pressure (LP) cylinder, utilizes corresponding described attachment means to excise corresponding described preposition low pressure simultaneously
Cylinder；With the decline of low pressure (LP) cylinder total steam discharge volume flow in real time, according to economic optimum, close one by one and connect described preposition low pressure
The described valve of cylinder, utilizes corresponding described attachment means to excise corresponding described preposition low pressure (LP) cylinder simultaneously one by one, until excision
Whole preposition low pressure (LP) cylinders, it, then progressively start to connect the described valve of the described preposition low pressure (LP) cylinder in inner side from inner side, simultaneously
Connect corresponding described preposition low pressure (LP) cylinder using corresponding described attachment means, until connecting whole preposition low pressure (LP) cylinders.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611058388.6A CN106401657A (en) | 2016-11-27 | 2016-11-27 | Coaxially arranged steam turbine optimizing configuration system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611058388.6A CN106401657A (en) | 2016-11-27 | 2016-11-27 | Coaxially arranged steam turbine optimizing configuration system and method |
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| CN201611058388.6A Pending CN106401657A (en) | 2016-11-27 | 2016-11-27 | Coaxially arranged steam turbine optimizing configuration system and method |
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| CN111042881A (en) * | 2018-10-12 | 2020-04-21 | 上海明华电力技术工程有限公司 | Wide-load high-efficiency steam turbine generator unit with part of cylinders capable of being cut off |
| CN114060107A (en) * | 2021-12-23 | 2022-02-18 | 中电华创电力技术研究有限公司 | Steam turbine system for deep flexible peak shaving |
| CN114165303A (en) * | 2022-02-11 | 2022-03-11 | 中国能源建设集团山西省电力勘测设计院有限公司 | Operation method of low-load flexibly-operated cogeneration steam turbine generator unit |
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| CN111042881A (en) * | 2018-10-12 | 2020-04-21 | 上海明华电力技术工程有限公司 | Wide-load high-efficiency steam turbine generator unit with part of cylinders capable of being cut off |
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Application publication date: 20170215 |