CN108087047A - Turbine LP rotors and its electricity-generating method - Google Patents
Turbine LP rotors and its electricity-generating method Download PDFInfo
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- CN108087047A CN108087047A CN201711470654.0A CN201711470654A CN108087047A CN 108087047 A CN108087047 A CN 108087047A CN 201711470654 A CN201711470654 A CN 201711470654A CN 108087047 A CN108087047 A CN 108087047A
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- turbine
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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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
This application provides turbine LP rotors, and installed capacity is less than 50MW, including vapor generation part, level-one generating set, reheat plant and two level generating set；Vapor generation part generates high steam；High steam is passed through in first turbine, and driving first turbine is worked with 5000~6700r/min rated speeds；Heat exchange occurs in vapor generation part for reheat plant guiding steam；Two level generating set includes second turbine and secondary generator；Present invention also provides a kind of electricity-generating method of above-mentioned turbine LP rotors, steam passes sequentially through level-one generating set and two level generating set, wherein, into the reheated device reheating of steam of secondary electricity generation unit.The advantages of the application, is that the capacity of the unit is the generated output summation of two generators；Into the steam in high speed turbine machine, higher than the steam pressure of no reheating embrittlement, unit total capacity achievees the purpose that energy saving pressure more than no reheating embrittlement, heat consumption less than no reheating embrittlement under identical initial temperature.
Description
Technical field
This application involves technical field of power generation more particularly to a kind of turbine LP rotors and its electricity-generating method.
Background technology
General steam electric power generator includes steam turbine, generator and high pressure steam boiler, and high pressure steam boiler is steam turbine
High steam is provided, steam turbine drives electrical power generators.Using single cycle, the thermal efficiency only up to reach modern medium and small unit
35%~38%.The substantial amounts of energy is not effectively utilized.
In order to make full use of steam heat, some power generator utilize reheating principle, and steam has done one in steam turbine
It after dividing work(, is drawn from centre, temperature (being generally increased to unit rated temperature) is improved by the reheater of boiler, is then returned
Steam turbine continues to do work, and is finally discharged into the steam turbine of condensing engine.Steam uses resuperheat, and it is wet to not only reduce gas turbine exhaust gas
Degree further improves the operating condition of several grade blades in steam turbine end, improves the internal efficiency ratio of steam turbine.
For example, applying for a patent for Patent No. 201110087438.4 discloses a kind of steam-turbine unit, the patent teaches
The scheme of thermal technology again, the steam-turbine unit include high-pressure steam engine, first to N reheaters and first to N reheating steamers
Machine, wherein the steam that the heating of the first reheater is discharged from high-pressure steam engine, steam drive the first reheated steam machine after heating, the
Two are utilized respectively the steam of first to N~1 reheat steam turbine discharge to N reheaters.
But the capacity of existing reheating generating set is substantially and even goes up m. gigawatt (GW)s hundreds of, in the power generation of low capacity
In unit, the development of reheating technology is not very ripe.
Therefore, how it is existing for the above-mentioned prior art the shortcomings that carry out research and development improvement, actually exerted needed for relevant industry
In view of this target of power research and development, the application designer, are the idea of think of and creation, are designed then with experience for many years, pass through
It is multi-party to inquire into and study sampling test and repeatedly correct improvement, it is to release the application.
The content of the invention
(1) technical problems to be solved
In view of above-mentioned technical problem, this application provides a kind of turbine LP rotors.
(2) technical solution
This application provides a kind of turbine LP rotors, installed capacity is less than 50MW, including shaping one engaging one another
Loop body：
Vapor generation part, including boiler；
Level-one generating set, including first turbine and level-one generator, the high steam is passed through in first turbine, is driven
Dynamic first turbine is worked with the rated speed of 5000~6700r/min, and first turbine drives level-one electrical power generators；
Reheat plant guides the steam flowed out from level-one generating set to again flow into vapor generation part, in steam generation
Heat exchange occurs in portion；
Two level generating set, including second turbine and secondary generator, the middle pressure steam through reheat plant flows into two
Level steam turbine, driving second turbine drive secondary generator power generation.
In some embodiments of the present application, the turbine LP rotors rated generation power is 30~50MW.
In some embodiments of the present application, the boiler pressure is 11.5~16Mpa.
In some embodiments of the present application, the first turbine rated speed is 5500r/min.
In some embodiments of the present application, the level-one generator rated generation power is 8.5~15MW.
In some embodiments of the present application, the second turbine rated speed is 3000r/min.
In some embodiments of the present application, the steam pressure after the reheating is 2.0~3.0Mpa.
In some embodiments of the present application, the secondary generator rated generation power is 24~35MW.
In some embodiments of the present application, the boiler is water-tube boiler or solar energy heat boiler.
Present invention also provides a kind of electricity-generating method of above-mentioned turbine LP rotors, vapor generation part generates pressure and is
The high steam of 11.5~16Mpa, high steam are passed through level-one generating set, drive first turbine, and first turbine rotating speed is
5500r/min, first turbine drive level-one electrical power generators；The middle pressure steam discharged from first turbine is through steam hot charging again
Pressure is 2.0~3.0Mpa after putting heating, which is passed through two level generating set again, drives second turbine, two level steamer
Machine rotating speed is 3000r/min, drives secondary generator power generation.
(3) advantageous effect
It can be seen from the above technical proposal that the application at least has the advantages that one of them：
(1) it is using single reheat technology in small-capacity generator group, i.e., common using a high speed turbine machine and one
The steam turbine series winding of rotating speed, the steam turbine action for the reheated rear driving ordinary rotational speed of steam discharged from high speed turbine machine, and it is high
Fast steam turbine and ordinary rotational speed steam turbine each drive a motor, and the capacity of the unit is total for the generated output of two generators
With；Steam pressure into the steam pressure in high speed turbine machine higher than no reheating embrittlement, but total capacity is more than without heat engine again
Group achievees the purpose that energy saving；
(2) it is 11.5~16Mpa into the steam pressure of high speed turbine machine, high speed turbine machine rotating speed is 5000~6700r/
Min, the generated output of the level-one generator of driving is 10MW or so, and the steam discharged from high speed turbine machine becomes middle pressure and steams
Vapour, driving ordinary rotational speed steam turbine rotates after the middle pressure steam is reheated, and ordinary rotational speed steam engine rotating speed is 3000r/min,
For the generated output of the generator of driving for 30MW or so, the total capacity of the generating set is 40MW or so, than same capacity nothing again
The steam pressure that the generating set of thermal process needs is small, than the generating set generated output of the thermal process again of the nothing under square one
Greatly, efficiency of energy utilization is improved, is suitble to small-capacity generator group；
(3) entire generating set drives two generators respectively using two stage turbine, and such combination is than traditional small work(
Two steam turbines drive an integral shaft generator to add flexibility simultaneously in rate generating set, and output electricity can be respectively connected to not
With step-up transformer or direct-furnish electricity consumption end, low-pressure turbine can also isolated operation, more take full advantage of the energy, using energy source
Rate improves more than 40%.
Description of the drawings
Fig. 1 is the schematic diagram of the embodiment of the present application.
Fig. 2 is the fitting arrangement of the embodiment of the present application.
【The application main element symbol description】
11st, boiler；12nd, fuel station；2nd, first turbine；
3rd, level-one generator；4th, reheater；5th, second turbine；
5th, reheating pipeline；6th, secondary generator；7th, elevated platform；
8th, superheater；9th, chimney；10th, main steam header road；
13rd, moisture separation device.
Specific embodiment
This application provides a kind of turbine LP rotors.Using two steam turbines of series connection, steam is from first steamer
Second steam turbine of driving after machine discharge is heated, first steam turbine are high speed turbine machine, and second steam turbine is common vapour
Turbine, the two combine, and reach the Effec-tive Function of small-capacity generator group.
Purpose, technical scheme and advantage to make the application are more clearly understood, below in conjunction with specific embodiment, and reference
The application is further described in attached drawing.
Embodiment one
In the exemplary embodiment of the application, turbine LP rotors are provided.As shown in Figure 1 and Figure 2, this Shen
Please generating set generated output between 30~50MW, by vapor generation part, level-one generating set, two level generating set it is engaging one another into
Include two level steamer comprising first turbine and level-one generator, two level generating set in one loop body, wherein level-one generating set
Machine and secondary generator.
Each component of the present embodiment is described in detail individually below.
Vapor generation part recycles the steam after Xun Huan for generating high steam, including coal gas fuel station 12 and height
Pressure steam boiler 11；Steam boiler 11 generates high steam of the pressure in 11.5~16Mpa, and high steam passes through main steam header road
10 flow into the first turbine 2 in level-one generating set, and the flue gas after fuel combustion is discharged from steam boiler chimney 9.
Level-one generating set includes first turbine 2 and level-one generator 3, after high steam is passed through in first turbine 2, drives
Dynamic first turbine 2 drives level-one generator 3 to generate electricity, steam discharges one after acting with 5000~6700r/min rotary speed workings
Level steam turbine 2, into reheat plant.
Main steam system include from boiler superheater outlet header to the main steam line of first turbine import stop valve,
Valve, steam trap connection and towards the system that the steam branch pipe into vapour equipment is formed, further include and are arranged from first turbine high pressure cylinder
Vapour is to the reheating cold segment pipe of boiler reheater outlet header, valve and from reheater outlet header to second turbine intermediate pressure cylinder
Reheating hot pipe, the valve of imported valve.Two-tube~single tube~double hose main steam system that the application uses, from superheater
Outlet is merged into a single tube in stokehold after picking out, to first turbine high pressure cylinder before be divided into as two branch pipes, be coupled with one
The main inlet throttle-stop valve of level steam turbine high pressure cylinder both sides since main steam line center section employs single tube, can be good at steam flow
It mixes, reduces the vapor (steam) temperature deviation and pressure divergence into first turbine.
Reheat plant is the reheater 4 being arranged in steam boiler, and reheater 4 is substantially a kind of and made work(
Low-pressure steam is heated and reaches the steam superheater of certain temperature again, and the effect of reheater 4 further improves power plant and follows
The thermal efficiency of ring, and the steam moisture of second turbine exhaust stage blade is made to control in allowed limits.Reheater 4 by pipe and
Header forms.Steam and flue gas are flowed through pipe is inside and outside respectively.By the difference of heat transfer type, reheater 4 can be divided into convection type and spoke
Penetrate formula.Convection type reheater 4 is arranged in convection pass；Radiant reheater 4 is arranged in burner hearth.
It is arranged using the two-stage heating surface of low-temperature reheater+high temperature reheater 4, reheating is adjusted using burner swing mode
The steam temperature of vapor (steam) temperature arranges certain cold reheater radiation heating-surface in upper furnace or furnace outlet radiation areas,
Using radiation+convection heating surface arrangement, achieve the purpose that steam temperature is adjusted to increase reheater system caloric receptivity at low load.
For the heat absorption proportion requirement for reaching the requirement of the vapor (steam) temperature needed for steam turbine, reaching superheated steam required 80% or so, stove
Thorax top needs to arrange certain 8 radiation heating-surface of superheater product, usually arranges total radiation heat absorption but the relatively low screen of vapor (steam) temperature
Formula superheater 8.
Steam is flowed out from level-one generating set, is flowed to by reheating pipeline 51 in reheater 4, with heat occurs in steam boiler 11
It exchanges, heats up again, the steam after heating enters two level generating set.
Two level generating set includes second turbine 5 and secondary generator 6, the pressure of the high steam through reheat plant
In 2.0~3.0Mpa, which flows into second turbine 5, and driving second turbine 5 drives two with 3000r/min rotary speed workings
Grade generator 6 generates electricity.
Reheating is to improve the measure of generating set heat efficiency, and after thermal technology again, the length of jet chimney increases, and causes
Construction cost increases, and duct length increases, and the resistance of the steam in pipeline is also increased, consumes the energy of steam, unfavorable
In making full use of for the energy.Traditional arrangement is all that unit is arranged in low level, since jet chimney is from steam copper
The high-order extraction of stove 11, the mounting means of low level increase the length of jet chimney, are unfavorable for improving generatine set heat efficiency.In this regard,
The mounting platform of steam turbine is arranged on to the high position for drawing jet chimney, first turbine 2 and the front and rear arrangement of second turbine 5,
The jet chimney length between steam turbine and steam boiler and steam turbine is shortened, reduces the energy in jet chimney internal loss
Amount, improves the thermal efficiency.
By the hot steam of level-one generating set or two level generating set also by there is moisture separation device 13, by gas and liquid
Body, which is separately recovered, to be reused.Moisture separation device 13 is construction of pressure vessel carbon steel or stainless steel equipment, and interface pattern is method
Blue structure.
Vapor generation part can be gas boiler, or water-tube boiler or solar energy heat boiler.
Embodiment two
On the basis of embodiment one, into first turbine steam pressure for 11.5Mpa, the rotating speed of first turbine
For 6500r/min, the generated output of level-one motor is 8.5MW.
Embodiment three
On the basis of embodiment one, the steam pressure into first turbine is 13Mpa, and the rotating speed of first turbine is
5500r/min, the generated output of level-one motor is 10MW.
Example IV
On the basis of embodiment one, the steam pressure into first turbine is 16Mpa, and the rotating speed of first turbine is
5500r/min, the generated output of level-one motor is 15MW.
Embodiment five
On the basis of one to three any embodiment, into second turbine middle pressure steam pressure for 2.1Mpa, two level
The rotating speed of steam turbine is 3000r/min, and the generated output of two level motor is 24MW.
Embodiment six
On the basis of one to three any embodiment, into second turbine middle pressure steam pressure for 2.3Mpa, two level
The rotating speed of steam turbine is 3000r/min, and the generated output of two level motor is 30MW.
Embodiment seven
On the basis of example IV, the middle pressure steam pressure into second turbine is 2.8Mpa, second turbine
Rotating speed is 3000r/min, and the generated output of two level motor is 35MW.
The technique effect situation of above-described embodiment one to four is summarized as follows table：
The technique effect situation of above-described embodiment five to seven is summarized as follows table：
The pressure of small-capacity generator group high-temperature steam of the tradition without reheating generally requires control in 8~8.8Mpa, 130t/
H can be only achieved the generated output of 30Mpa, and energy consumption is the 105~108% of the application.As can be seen from the above table, this patent
Generating efficiency significantly improve.
So far, attached drawing is had been combined the present embodiment is described in detail.According to above description, those skilled in the art
There should be clear understanding to the application.
It should be noted that in attached drawing or specification text, the realization method that does not illustrate or describe is affiliated technology
Form known to a person of ordinary skill in the art, is not described in detail in field.In addition, the above-mentioned definition to each element and method is simultaneously
It is not limited only to various concrete structures, shape or the mode mentioned in embodiment.
It should also be noted that, the demonstration of the parameter comprising particular value can be provided herein, but these parameters are without definite etc.
In corresponding value, but analog value can be similar in acceptable error margin or design constraint.The side mentioned in embodiment
To term, such as " on ", " under ", "front", "rear", "left", "right" etc., only it is the direction of refer to the attached drawing, is not used for limiting this
The protection domain of application.In addition, unless specifically described or the step of must sequentially occur, the orders of above-mentioned steps there is no restriction in
It is listed above, and can change or rearrange according to required design.And above-described embodiment can be based on design and reliability
Consider, the collocation that is mixed with each other is used using or with other embodiment mix and match, i.e., the technical characteristic in different embodiments can be with
Freely form more embodiments.
Particular embodiments described above has carried out the purpose, technical solution and advantageous effect of the application further in detail
It describes in detail bright, it should be understood that the foregoing is merely the specific embodiments of the application, is not limited to the application, it is all
Within spirit herein and principle, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the application
Within the scope of shield.
Claims (10)
1. a kind of turbine LP rotors, installed capacity is less than 50MW, which is characterized in that including one Xun Huan of shaping engaging one another
Body：
Vapor generation part, including boiler (1)；
Level-one generating set, including first turbine (2) and level-one generator (3), the high steam is passed through first turbine (2)
Interior, driving first turbine (2) is worked with the rated speed of 5000~6700r/min, and first turbine (2) drives level-one power generation
Machine (3) generates electricity；
Reheat plant guides the steam flowed out from level-one generating set to again flow into vapor generation part, in vapor generation part
Generation heat exchange；
Two level generating set, including second turbine (5) and secondary generator (6), the middle pressure steam through reheat plant flows into
Second turbine (5), driving second turbine (5) drive secondary generator (6) to generate electricity.
2. turbine LP rotors according to claim 1, which is characterized in that the turbine LP rotors rated generation
Power is 30~50MW.
3. turbine LP rotors according to claim 1, which is characterized in that the boiler pressure for 11.5~
16Mpa。
4. turbine LP rotors according to claim 1, which is characterized in that first turbine (2) rated speed
For 5500r/min.
5. turbine LP rotors according to claim 1, which is characterized in that level-one generator (3) rated generation
Power is 8.5~15MW.
6. turbine LP rotors according to claim 1, which is characterized in that second turbine (5) rated speed
For 3000r/min.
7. turbine LP rotors according to claim 1, which is characterized in that the steam pressure after the reheating is 2.0
~3.0Mpa.
8. turbine LP rotors according to claim 1, which is characterized in that secondary generator (6) rated generation
Power is 24~35MW.
9. according to claim 1~8 any one of them turbine LP rotors, which is characterized in that the boiler (1) is thermoelectricity
Boiler or solar energy heat boiler.
10. a kind of electricity-generating method of claim 1~8 any one of them turbine LP rotors, which is characterized in that steam is sent out
Life portion generates the high steam that pressure is 11.5~16Mpa, and high steam is passed through level-one generating set, drives first turbine (2),
First turbine (2) rotating speed is 5500r/min, and first turbine (2) drives level-one generator (3) to generate electricity；From first turbine
(2) middle pressure steam of discharge pressure after reheat plant heats is 2.0~3.0Mpa, which is passed through two level hair again
Electric group, driving second turbine (5), second turbine (5) rotating speed is 3000r/min, and secondary generator (6) is driven to generate electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711470654.0A CN108087047A (en) | 2017-12-28 | 2017-12-28 | Turbine LP rotors and its electricity-generating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711470654.0A CN108087047A (en) | 2017-12-28 | 2017-12-28 | Turbine LP rotors and its electricity-generating method |
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Family
ID=62180554
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No.135 Zhongxiu Middle Road, Nantong, Jiangsu Applicant after: Jintongling Technology Group Co., Ltd. Address before: 226001 No. 135 Zhong Xiu Zhong Lu, Jiangsu, Nantong Applicant before: Jiangsu Jintongling Fluid Machinery Technology Co., Ltd. |