CN110159365A - A kind of sequence starting method of the small steam turbine of two-shipper backheat - Google Patents
A kind of sequence starting method of the small steam turbine of two-shipper backheat Download PDFInfo
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- CN110159365A CN110159365A CN201910507408.0A CN201910507408A CN110159365A CN 110159365 A CN110159365 A CN 110159365A CN 201910507408 A CN201910507408 A CN 201910507408A CN 110159365 A CN110159365 A CN 110159365A
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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
Abstract
The invention discloses a kind of sequence of small steam turbine of two-shipper backheat start method, comprising: judge small machine be in allow start and auxiliary system be in normal condition, by extraction check valve, filling valve and overflow valve throw automatically；Judge that non-return valve, filling valve and overflow valve are in close state, drain valve is thrown automatically, stop preset time period after control drain valve is in automatic；Judge that small steam turbine lubricating oil system is in normal condition；Judge that small steam turbine main inlet throttle-stop valve is closed and fault-free, control turning for Feed Pump Turbine band feed pump turbine speed are greater than preset rotation speed value；Judge that main inlet throttle-stop valve and homophony door in closed state, control bypass valve and open, steam discharge overflow valve is closed；Judge steam quality qualification, warming-up is started according to setting warming-up revolving speed, filling valve and overflow valve remain turned-off in warming-up process；Judge that warming-up terminates, revolving speed setting tracks to predetermined target value；Judge that actual speed reaches predetermined target value, setting exhaust steam pressure reaches preset pressure value, Bypass Control is thrown automatic.
Description
Technical field
The present invention relates to automatic control technology fields more particularly to a kind of sequence of small steam turbine of two-shipper backheat to start method.
Background technique
With the development of thermal power generating technology and the continuous improvement of unit parameter, unit vapor (steam) temperature, pressure and it was evacuated
Temperature is higher and higher, such as American-European and developed country, Japan is researching and developing next-generation high extra-supercritical unit, and temperature can reach
700℃.In order to adapt to the operating condition of this high parameter, required system equipment material property, class requirement can be continuously improved, phase
The buying answered and manufacturing expense will be continuously increased.For this purpose, there is mechanism to propose a kind of scheme of two-shipper backheat: by adding one
High parameter, powerful back pressure extraction small turbine substitute conventional feed pump small turbine, while Steam Turbine Through IP Admission
Regenerative steam is no longer set, and corresponding regenerative steams at different levels are drawn by small turbine, can greatly reduce the steaming of steam extraction in this way
Stripping temperature improves safety to reduce project cost.The introducing of the small machine of backheat, in addition to meet traditional feed pump
Outside the demand that steam turbine is controlled about revolving speed, it is also contemplated that the operating conditions such as steam extraction, steam discharge, filling and overflow, control is complicated, with tradition
The control mode of feed pump turbine make a big difference.Due to the starting of small machine under two-shipper backheat framework devise it is more
The inspection judgement of auxiliary system and steam turbine ontology valve state, cylinder temperature, revolving speed, pressure and other parameters, the device type being related to and behaviour
Make the various complexity of step, if using the mode of manually booting, it is desirable that operator has very high operation level and very strong processing
Ability.And manually boot and inevitably have the disadvantage that: complicated manual operation will increase the probability of operator's error in operation,
Increase the operating pressure of operator；Manual operation will necessarily be led since all steps require operator's manual confirmation and judgement
Cause the delay of operating process, steam turbine inefficiency.
Currently, the sequence starting research for the feed pump turbine under two-shipper heat regenerative system framework is less, how to consider
In two-shipper heat regenerative system, it is automatically performed in small machine start-up course to relevant auxiliary system, extraction check valve, drain valve, small
The automatic synchronization of owner's porthole, homophony door, bypass valve, overflow valve, aeration valve, steam quality and revolving speed etc. controls, and mitigates operation
The operating pressure of member during startup, reduces the mhuman failure of operator's operation error, improves small machine starting efficiency with ten
Divide important meaning.
Summary of the invention
The present invention provides a kind of sequences of small steam turbine of two-shipper backheat to start method, can only be by solve the starting of existing sequence
The technical issues of staff is manually operated, to realize two-shipper regenerative feed-water mercury vapour by automatically controlling sequence coordination control
The automatic starting of turbine also improves the starting efficiency of feed pump turbine while reducing the pressure of operator's manual operation.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of sequence starting sides of small steam turbine of two-shipper backheat
Method, comprising:
Judge whether small machine is in permission starting state, if so, extraction check valve, filling valve and overflow valve are thrown certainly
It is dynamic；
Judge whether all non-return valves, filling valve and overflow valve are in closed state, if so, all drain valves are thrown
Automatically, and stop preset time period after all drain valves are in automatic is controlled；
Judge whether lubricating oil system is in normal condition, if it is, continuing to execute subsequent judgement；
Judge whether main inlet throttle-stop valve closes and fault-free, if so, control turning for Feed Pump Turbine band feed pump turbine
Revolving speed is greater than preset rotation speed value；
Judge whether the main inlet throttle-stop valve and the homophony door are in full closing state again, if so, control bypass valve is complete
It opens, and control steam discharge overflow valve contract fully；
Judge whether steam quality is qualified, if so, starting warming-up is controlled according to the warming-up revolving speed of setting, in the warming-up
The filling valve is controlled in the process and the overflow valve remains turned-off；
Judge whether warming-up terminates, if so, control revolving speed setting tracks to predetermined target value；
Judge whether actual speed reaches predetermined target value, if so, control setting exhaust steam pressure reaches preset pressure value,
And throw Bypass Control automatically, feed pump turbine start completion is then indicated after bypassing and being all automatically closed.
Preferably, all non-return valves of the judgement, filling valve and overflow valve are in the foundation of closed state are as follows:
The valve opening of the non-return valve, the filling valve and the overflow valve is respectively less than 5%.
Preferably, the stop preset period is 30 seconds after all drain valves of control are in automatic.
Preferably, the foundation that the main inlet throttle-stop valve and the homophony door are closed are as follows: the main steam valve is less than 3%
It is in off state, the homophony door aperture is in off state less than 3%.
Preferably, the preset rotation speed that the control turning for Feed Pump Turbine is greater than with feed pump turbine speed
Value is 9rmp.
Preferably, the standard that the control bypass valve is opened is that the aperture of the bypass valve is greater than 98%.
Preferably, the standard that the control steam discharge overflow valve is closed is that the aperture of the steam discharge overflow valve is less than
2%.
Preferably, the foundation of the judgement steam quality qualification are as follows: 56 DEG C of steam superheat > before stop valve valve,
Feed pump outer shell up/down half 3 is taken out, 4 take out, 5 take out, 6 pumping section metal temperature differences meet -45 DEG C of 30 DEG C of < previous-next <, and judge without reason
Barrier.
Preferably, the control revolving speed, which is set, tracks to preset target value as 2400rpm.
Preferably, the control sets preset pressure value that exhaust steam pressure reaches as 0.3Mpa.
Compared with the prior art, the embodiment of the present invention has the following beneficial effects:
The sequence of the invention proposes a kind of under two-shipper heat regenerative system framework feed pump turbine starts method, by from
Dynamic control device sequence coordination control, realizes the automatic starting of two-shipper regenerative feed-water mercury vapour turbine, grasps manually reducing operator
Also the starting efficiency of feed pump turbine is improved while the pressure of work.
Detailed description of the invention
Fig. 1: start method and step flow chart for the small steam turbine sequence of two-shipper backheat in the embodiment of the present invention；
Fig. 2: in the embodiment of the present invention cold conditions and hot two states under steam turbine start climb curve figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Feed pump turbine under two-shipper heat regenerative system framework drives back pressure extraction feedwater pump using the steam before reheating
Steam turbine, the steam extraction from feed pump turbine pass through heater using the lower feed pump turbine steam extraction of the degree of superheat and steam discharge
Come heat-setting water and water supply.Entire unit economy is improved by reducing the higher Heater Terminal Temperature Difference of the steam extraction degree of superheat.It is typical
Ground feed pump turbine can using 3 take out 1 row's schemes, i.e., gas source be host high pressure cylinder steam discharge, feed pump turbine pumping supply 3#,
4# high sums it up oxygen-eliminating device, and steam discharge adds to 6# is low.If tolerance is insufficient, supplemented from intermediate pressure cylinder steam extraction, if tolerance is extra, overflow
To No. 7 it is low plus.In order to realize the sequence starting of feed pump turbine, needs to formulate reasonable starting step sequence, utilize water supply mercury vapour
The automatic control system MEH of turbine judges the state relevant with whole unit of feed pump, and then control system executes reasonable
Step sequence can complete the sequence starting of unit.The starting step sequence of feed pump turbine mainly includes under two-shipper heat regenerative system framework
Following procedure, as shown in Figure 1:
Step 1: after confirming that small machine is in permission starting state, extraction check valve and filling, overflow valve are thrown automatic；
Step 2: it determines that all non-return valves and filling, overflow valve are in close state (valve opening < 5%), will own
Drain valve is thrown automatically, stops 30s after all drain valves are in automatic；
Step 3: judge that small steam turbine wheel lubricating oil system mode is normal；
Step 4: check whether main inlet throttle-stop valve closes (aperture is less than 3%) and fault-free, turning for Feed Pump Turbine band water supply
Pump turbine speed > 9rmp；
Step 5: reaffirm that main inlet throttle-stop valve, homophony door are in full off state (aperture is less than 3%), bypass valve standard-sized sheet (aperture
> 98%), steam discharge overflow valve closes (aperture is less than 2%) entirely；
Step 6: judging steam quality, (56 DEG C of steam superheat > before stop valve valve, feed pump outer shell up/down half 3 takes out, 4
Take out, 5 take out, 6 take out section metal temperature differences and meet -45 DEG C of 30 DEG C of < previous-next <, and fault-free), after steam quality is qualified, according to setting
Fixed warming-up revolving speed starts warming-up, and filling and overflow valve remain turned-off in warming-up process；
Step 7: after determining warming-up, revolving speed, which will be set, tracks to target value 2400rpm；
Step 8: when actual speed reaches target value, setting exhaust steam pressure as 0.3Mpa, Bypass Control throw it is automatic, to side
Road then indicates feed pump turbine start completion after being all automatically closed.
In the present embodiment, the starting of small steam turbine is divided into there are two types of mode: cold conditions and hot.When the inside wall of cylinder in small turbine
At 150 DEG C of metal temperature <, definition unit is cold conditions, when inside wall of cylinder metal temperature >=150 DEG C in small turbine, defines unit
It is hot.The climb curve of steam turbine starting is different under cold conditions and hot two states, under unit cold start mode,
Unit needs more warm-up periods.Detailed curve is as shown in Figure 2.
Starting and load up is completed (for the main steam turbine load of 1000MW unit in main steam turbine when small turbine starts
About 300MW), the starting vapour source using the cold reheated steam of main steam turbine as small turbine, vapour source parameter is about 1.0~
2.5MPa (a), 250~390 DEG C, and the degree of superheat requires to be not less than 56 DEG C.
System mode when steam turbine starts are as follows:
Starting and load up is completed in A, main steam turbine, and main unit load is about 300MW (for 1000MW unit)；
B, #10, #9, #8, #7 low-pressure heater complete investment, and vapour source comes from main steam turbine；
C, oxygen-eliminating device complete investment, and vapour source comes from auxiliary steam；
D, #1, #2, #3, #4 high-pressure heater and #6 low-pressure heater are not put into.
During condition has, into small machine sequence start-up mode, small machine is actuated for controlling using sequential control block
System.
It is errorless that all right installation is reached all by examining to each portion set of this steam turbine, each equipment before starting.Respectively set
Standby required normal power source and backup power source and compressed air gas source etc. are all within normal specification.Ring around unit place
Border is clean and tidy, confirms that it is in good starting state.
Before rotor red switch, the starting test of each oil pump of oil system and automatic starting test reach design requirement, fuel tank oil
Position reaches design requirement, and oil level indicator is working properly, and oil cooler Inlet and outlet water is unimpeded, and oil kind, oil, oil temperature meet design and want
It asks, exhaust fan has been turned on fuel tank, and it is first oil-filled by direct current lubricating oil oil pump oil feeding system before main oil pump starting, in oil system
Pipeline, each portion set, each chamber are completely filled with after oil, are just allowed by main oil pump fuel feeding, the oil pressure for adjusting each section makes Qi Gebu
The oil pressure divided is stable and meets design requirement, and all oil pipe lines must No leakage phenomenon.
In embodiment, after determining that lubrication pressure is established, rotor speed is zero, start apparatus for rotating, put into jiggering, jiggering
Revolving speed is 103r/min.In order to guarantee that this turbine rotor does not occur bending and deformation, avoid generating unnecessary vibration after red switch
It is dynamic, therefore cold start apparatus for rotating at least runs 45min or more before red switch.
After apparatus for rotating puts into operation, confirmation main steam turbine condenser has built up vacuum, opens by small steam turbine exhaust steam
Road valve.Sealing system work is put into simultaneously, send vapour to axle envelope.
Note: not allowing to send vapour to axle envelope when apparatus for rotating does not put into operation, not to avoid steam turbine rotor local heating
Uniformly, cause turbine rotor to generate the bending deformation that should not occur, influence the starting and safe operation of steam turbine.
Hydrophobic valve before unlatching small turbine main inlet throttle-stop valve on jet chimney carries out the heating coil work of jet chimney, opens
All hydrophobic valves of ontology prepare starting.
Driven steam feed pump and water supply system confirmation have had entry condition.
About the red switch and raising speed of steam turbine, condition before red switch: A, put into after apparatus for rotating monitor it is inside steam turbine and each
Axle envelope sound without exception, and turbine rotor can be normally carried out jiggering operation, automobile assembly welding Iine is without any exception；B, forward and backward
The steam supply of packing: the steam pressure range of gland steam steam supply is 0.117~0.131MPa (a), and temperature range is 280~320
℃.The steam extraction (gas) of each packing of steam turbine enters main steam turbine gland-sealing cooler；C, lubricating oil main-piping pressure (2.8~
After 3.5bar is adapted to unit centre line), EH oil pressure it is normal；Lubricating oil temperature is normal (after 46~52 DEG C of oil coolers)；Fuel level in tank
Normally (normal level away under fuel tank top plate along 636mm)；D, state of the small turbine valve when preparing red switch see the table below 1:
1 small turbine of table prepares valve state when red switch
Test before red switch: note that isolating valve of the confirmation before small turbine main inlet throttle-stop valve is in the case where closing
Test before can carrying out following each red switch, in case steam enters steam turbine and causes danger.Small turbine is confirmed after test
Main inlet throttle-stop valve and regulating valve can the above-mentioned isolating valves of standard-sized sheet when being completely in closed position.It include: a, quick closing valve pilot solenoid valve: quick closing valve
Solenoid valve is in running order, is then turned on small turbine main inlet throttle-stop valve and servo valve, and electromagnetism valve events observe small turbine master
Whether porthole and servo valve close normal.Each valve shut-in time is no more than 0.5s (be subject to technical protocol).B, oil system
Test: each oil pump can reach automatic switchover by the oil pressure range of oil system defined, and functional.
When steam turbine meets red switch condition, after operations staff is connected to the instruction of starting, it can according to circumstances make small turbine
Quick closing valve solenoid valve electrification movement on main inlet throttle-stop valve oil motor, servo valve oil motor, can be slow after main inlet throttle-stop valve standard-sized sheet
(must be noted that slowly) is opened oil motor driving servo valve and is opened, and steam turbine starts red switch.When turbine speed is higher than jiggering
When revolving speed, jiggering clutch disengages automatically and provides instruction, so that turning motor is stopped working, while cutting off lubricating oil fuel feeding.It is small
State of the steam turbine valve in red switch and raising speed see the table below 2:
Valve state when 2 small turbine red switch of table
During steam turbine red switch, if vibration is greater than alarming value, machine group alarm；If vibration is greater than shutdown value,
Unit blocking, answers red switch again after queueing problem.Slow raising speed controls this boosting velocity procedure, cold conditions is by about to~1000r/min idling
The raising speed rate raising speed of 100r/min/min, and the hot raising speed rate raising speed by about 200r/min/min during idling, should be examined comprehensively
Look into unit operating condition: rotor oscillation situation is normal, monitors inside steam turbine and must sound without exception and to each at each axle envelope
Instrument carries out monitoring inspection, it is necessary to all within normal range (NR).During idling, as low speed warming, cold conditions must not be less than
30min, it is hot to be less than 10min.
Make steam turbine raising speed to minimum operating speed, i.e. 2400r/min, throws water supply coordinated control after stablizing the revolving speed.Control
This boosting velocity procedure is made, cold conditions raising speed rate is about 250r/min/min, and hot raising speed rate is about 300r/min/min, crosses critical speed
When raising speed rate be 500r/min/min.
Points for attention in steam turbine red switch and boosting velocity procedure: A, in boosting velocity procedure, revolving speed near first critical speed,
Stop should be avoided.Critical speed value should be subject to the actual Critical Speed value surveyed in power station.B notices that steam turbine is forward and backward at any time
Peak-peak value of shaft vibration (opposite bearing block) at bearing: steam turbine must not exceed in the continuous operation range of speeds
0.076mm.Steam turbine must not exceed 0.125mm when crossing critical speed.C pays attention to lubricating oil temperature after turbine speed increases
Degree, adjusts cooling water inflow control oil cooler outlet oil temperature at one 50 DEG C of stationary value, the oil inlet Oil-temperature control of each bearing 46~
52℃.D notices that thrust bearing returning-oil temperature should be less than 70 DEG C, and highest must not exceed 80 DEG C；The metal tile temperature of any bearing is not
It obtains more than 107 DEG C.E, when the load of host groups reaches 40% or so, the number depending on hydrophobic amount gradually closes each drain water piping
Hydrophobic valve.It is also noted that driven steam feed pump operating condition in F, steam turbine red switch and boosting velocity procedure.
Steam discharge switching: putting into the instruction of #6 low-pressure heater according to DCS, slowly opens the low butterfly valve added on extraction line of #6
(DCS control) keeps steam discharge low to #6 plus switches, and DCS controls the opening speed of butterfly valve, maintains #6 is low rate of temperature change is added to be no more than
3℃/min；Small steam turbine exhaust steam bypass valve follows back pressure setting value 0.3MPa (a), with the opening of butterfly valve, small steam turbine exhaust steam
Bypass valve gradually turns down, and after butterfly valve is fully open, that is, indicates to complete steam discharge switching；Handoff procedure should put into exhaust steam pressure, row
Stripping temperature, the protection of final stage group pressure ratio.State of the small turbine valve when back pressure switches see the table below 3:
Valve state when 3 small steam turbine exhaust steam of table switches
Close steam discharge bypass valve: small steam turbine exhaust steam bypass valve continues to track back pressure setting value 0.3MPa (a), successively puts into
Oxygen-eliminating device (#5), #4 high add, #3 high adds.After the completion of #3 high adds investment, the state of small steam turbine exhaust steam bypass valve is checked, if small
Turbine discharge bypass valve is in the open state, then small steam turbine exhaust steam is bypassed valve breakdown.The valve state of small turbine is such as
The following table 4:
| Valve | State |
| Small turbine stop valve | It opens |
| Small turbine servo valve | It opens, controls revolving speed |
| Small steam turbine exhaust steam safety valve 1 | It closes |
| Small steam turbine exhaust steam non-return valve | It opens |
| Small steam turbine exhaust steam safety valve 2 | It closes |
| Small turbine overflow butterfly valve (DCS) | It closes |
| Small turbine overflow regulating valve | It closes |
| Small turbine overflow non-return valve | It closes |
| #6 is low to add filling non-return valve | It closes |
| #6 is low to add filling regulating valve | It closes |
| #6 is low to add filling butterfly valve (DCS) | It closes |
| Small steam turbine exhaust steam bypass valve | It closes |
| #6 steam extraction butterfly valve (DCS) | It opens |
| #6 extraction check valve | It opens |
Valve state when 4 small turbine start completion of table
So far, small turbine complete starting raising speed to working speed, steam discharge switch to #6 it is low plus, close small turbine row
The whole process of vapour bypass valve can be ready for the switching of electric pump-heat pump.
Pay attention to 1: small turbine overflow regulating valve and #6 is low plus filling regulating valve is in closing shape in entire start-up course
State.
Notice that the instruction of 2:#6 low-pressure heater, oxygen-eliminating device (#5), #4 high-pressure heater, #3 high-pressure heater investment comes from
In DCS.
Open butterfly valve (DCS): after small turbine completes starting, DCS control opening small turbine overflow butterfly valve, #6 is low plus mends
Vapour butterfly valve.
The present invention is designed reasonable suitable by the Booting sequence of reasonable small machine complexity under combing two-shipper heat regenerative system framework
Control step, realize the small steam turbine under two-shipper heat regenerative system framework sequence starting, avoid operations staff's maloperation etc. artificial because
Element stablizes the influence of starting to unit safety, while also shortening the starting time, improves operational efficiency.Due to being that first of the whole world is double
The sequence of the small machine of machine backheat starts, and has reference and demonstration meaning to the subsequent small machine of two-shipper backheat.
Particular embodiments described above has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that the above is only a specific embodiment of the present invention, the protection being not intended to limit the present invention
Range.It particularly points out, to those skilled in the art, all within the spirits and principles of the present invention, that is done any repairs
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of sequence of small steam turbine of two-shipper backheat starts method characterized by comprising
Judge whether small machine is in permission starting state, if so, extraction check valve, filling valve and overflow valve are thrown automatic；
Judge whether all non-return valves, filling valve and overflow valve are in closed state, if so, all drain valves are thrown certainly
It is dynamic, and control after all drain valves are in automatic and stop preset time period；
Judge whether lubricating oil system is in normal condition, if it is, continuing to execute subsequent judgement；
Judge whether main inlet throttle-stop valve closes and fault-free, if so, control turning for Feed Pump Turbine band feed pump turbine speed
Greater than preset rotation speed value；
Judge whether the main inlet throttle-stop valve and the homophony door are in full closing state again, if so, control bypass valve full open,
And control steam discharge overflow valve contract fully；
Judge whether steam quality is qualified, if so, starting warming-up is controlled according to the warming-up revolving speed of setting, in the warming-up process
The middle control filling valve and the overflow valve remain turned-off；
Judge whether warming-up terminates, if so, control revolving speed setting tracks to predetermined target value；
Judge whether actual speed reaches predetermined target value, if so, control setting exhaust steam pressure reaches preset pressure value, and will
Bypass Control is thrown automatically, then indicates feed pump turbine start completion after bypassing and being all automatically closed.
2. the sequence of the small steam turbine of two-shipper backheat as described in claim 1 starts method, which is characterized in that the judgement is all inverse
Only valve, filling valve and overflow valve are in the foundation of closed state are as follows: the non-return valve, the filling valve and the overflow valve
Valve opening is respectively less than 5%.
3. the sequence of the small steam turbine of two-shipper backheat as described in claim 1 starts method, which is characterized in that all institutes of control
Stating the stop preset period after drain valve is in automatic is 30 seconds.
4. the sequence of the small steam turbine of two-shipper backheat as described in claim 1 starts method, which is characterized in that the main inlet throttle-stop valve and institute
State the foundation of homophony door closing are as follows: the main steam valve is in off state less than 3%, and the homophony door aperture is less than 3%
Closed state.
5. the sequence of the small steam turbine of two-shipper backheat as described in claim 1 starts method, which is characterized in that the control feed pump
Turbine Barring Gears are 9rmp with the preset rotation speed value that feed pump turbine speed is greater than.
6. the sequence of the small steam turbine of two-shipper backheat as described in claim 1 starts method, which is characterized in that the control bypass valve
The standard of unlatching is that the aperture of the bypass valve is greater than 98%.
7. the sequence of the small steam turbine of two-shipper backheat as described in claim 1 starts method, which is characterized in that the control steam discharge overflows
Flowing the standard that valve is closed is the aperture of the steam discharge overflow valve less than 2%.
8. the sequence of the small steam turbine of two-shipper backheat as described in claim 1 starts method, which is characterized in that the judgement steam product
The foundation of matter qualification are as follows: 56 DEG C of steam superheat > before stop valve valve, feed pump outer shell up/down half 3 is taken out, 4 take out, 5 take out, 6 take out section
Metal temperature difference meets -45 DEG C of 30 DEG C of < previous-next <, and judges fault-free.
9. the sequence of the small steam turbine of two-shipper backheat as described in claim 1 starts method, which is characterized in that the control revolving speed is set
Surely tracking to preset target value is 2400rpm.
10. the sequence of the small steam turbine of two-shipper backheat as described in claim 1 starts method, which is characterized in that the control setting
The preset pressure value that exhaust steam pressure reaches is 0.3Mpa.
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| CN111255536A (en) * | 2020-01-22 | 2020-06-09 | 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 |
| CN112012803A (en) * | 2020-07-29 | 2020-12-01 | 陕西北元化工集团股份有限公司 | Operation method for optimized starting of steam turbine |
| CN112228165A (en) * | 2020-10-14 | 2021-01-15 | 北京博力威格智能传控设备有限公司 | Speed regulating method and system for steam turbine and storage medium |
| CN112343678A (en) * | 2020-11-05 | 2021-02-09 | 华能国际电力股份有限公司玉环电厂 | Starting control method of thermal power generating unit |
| CN112664283A (en) * | 2020-12-23 | 2021-04-16 | 上海电气电站设备有限公司 | Turbine automatic start-stop sequential control method, ultra-supercritical turbine unit and method thereof |
| CN112761738A (en) * | 2021-02-08 | 2021-05-07 | 浙江浙能技术研究院有限公司 | Novel method for judging tightness of steam extraction check valve of steam turbine |
| CN113074026A (en) * | 2021-04-02 | 2021-07-06 | 杭州华电半山发电有限公司 | Control method of steam turbine high-pressure cylinder steam inlet pipeline drainage valve |
| CN115234309A (en) * | 2022-08-26 | 2022-10-25 | 西安热工研究院有限公司 | BEST small steam turbine self-starting control system based on motor starting mode |
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