Turbine Operation Procedrue(a)

TURBINE OPERATION RULES

VSLP 1135MW POWER PLANT RAJASTHAN PROJEDCT

Client: SEPCO ELECTRIC POWER CONSTRUCTION CORPORATION

No.26-W9-YX-01TURBINE OPERATION RULES (A)Total 151 Pages

Operation Instruction

SEPCOIII

Drafted by: Reviewed by: Approved by:

Name of Change SheetNo.Time of Approval

1

2

3

CONTENTSPART 1 OverviewChapter 1 Specification of Main Equipment 5Chapter 2 Specification of Auxiliary Equipment 14PART 2 Unit Start-upChapter 1 Cold Start of the Unit .26Chapter 2 Warm & Hot Start of the Unit ...38PART 3 Unit Operation Chapter 1 Operating Parameters of Steam Turbine 42Chapter 2 Operating Modes of the Unit ....47Chapter 3 Regular Works and Requirements ..49PART 4 Unit Shutdown

PART 5 Treatment of Unit AccidentsChapter 1 Treating Rules of Accidents ..60Chapter 2 Condition of Steam Turbine Tripping ...61Chapter 3 Condition of Unit Fault Shutdown 61Chapter 4 Condition of Emergency Shutdown..62Chapter 5 Procedure of Emergency Shutdown....63Chapter 6 Procedure of Unit Fault Shutdown ..63Chapter 7 Decreasing of Vacuum ..64Chapter 8 Water Hammer of Steam Turbine 65Chapter 9 Increasing of Axial Displacement ....66Chapter 10 Steam Turbine Oil System Catching Fire ....67Chapter 11 Abnormity of Steam Conditions .68

Chapter 12 DEH Failure .71Chapter 13 Abnormity of Steam Turbine Lubricating Oil System 71

Chapter 14 Abnormal Vibration of the Unit .75Chapter 15 Generator parallels off, while turbine does not trip ...77Chapter 16 Generator parallels off, and turbine trips 77Chapter 17 Turbine trips, while the generator does not parallel off 78Chapter 18 Failure of Thermodynamic Power Supply 78Chapter 19 High Bearing Temperature of Turbine-generator Unit 79Chapter 20 Burning out of Turbine-generator Bearing Bush .79Chapter 21 Steam Turbine Shaft Bending 80Chapter 22 Steam turbine Overspeed ..82

Chapter 23 Feed water pump set outlet check valve is untight and rotates reversely.83Chapter 24 Turbine-generator unit operates at abnormal frequency 83Chapter 25 Boiler Fire Extinction 84Chapter 26 Treatment of Accidents & Abnormity of the Motor ..85PART 6 Auxiliary Equipment & Common Service SystemChapter 1 General Operating Rules of Auxiliary Equipment.. 89Chapter 2 Industrial Water System.92Chapter 3 Oil Purification System of Steam Turbine94Chapter 4 Lubricating Oil System of Steam Turbine 98Chapter 5 Circulating Water System ...102Chapter 6 Shaft Sealing and Vacuum System of Steam Turbine ...108Chapter 7 Condensate Water System ....111Chapter 8 Feed Water Deaerating System ...117Chapter 9 DEH System ....131Chapter 10 Bypass System ..136Chapter 11 Turbine Proper Water Drain System ..138Chapter 12 Quick Cooling System of Steam Turbine ..139Chapter 13Air Cooling System ..143Appendix 1: Comparison Table of the Temperature & Pressure of Saturated Water & Steam .......147PART 1: OverviewChapter 1 Specification of Main Equipment

1.1 Specification of steam turbine equipmentModel: N135-13.2/535/535Type: super-high pressure, primary reheating, double cylinder, double-flow, single shaft, extraction and condensing steam.

Rated power: 135MW

Initial steam pressure: 13.24Mpa (a)Initial steam temperature: 535Reheat steam temperature: 535Exhaust pressure: 5.4kPa (a)Rated speed: 3,000r/min

Rotating direction: clockwise (as viewed from the governor side to generator)

Manufactured by: Shanghai Turbine Co., Ltd.1.2 Main technique parametersMax power:

146.822MW

Rated power:

135MWRated pressure of the steam before initial steam stop valve: 13.24Mpa (a)=132 kg/cm2Rated temperature of the steam before initial steam stop valve: 535 CRated pressure of the steam before reheat steam valve: 2.238 Mpa (a)Rated temperature of the steam before reheat steam valve: 535Rated cooling water temperature: 24Rated backpressure:5.4kpa (a)Rated speed: 3,000 rpm

Feed water temperature under rated condition: 244.4Max back pressure at which the unit is permitted to operate: 18.6kpa (a)Regeneration stages: 2 HP heaters, 4 LP heaters & 1 deaerator

Length of the last blade of LP cylinder: 660mm

Critical speed of shafting: 1850r/min for HP & MP rotor

2116r/min for LP rotor1290r/min for generator rotor

Stages of flow path: total 39 stages: HP cylinder: 1 governing stage + 8 pressure stagesMP cylinder: 10pressure stagesLP cylinder: 26 pressure stages1.3 Description of turbine characteristics1.3.1 This unit can carry the base load of power network, as well as can be used as two-shift or peak regulation unit.1.3.2 This units operating time at no load when rejecting load must not exceed 15 mins.

1.3.3 This units operating time without steam must not exceed 1 min.1.3.4 This units idle time with full vacuum after trip is about 45 mins and that without vacuum is about 15 mins.

1.3.5 This units blades can run safely at the grid frequency of 47.5~51.5hz for long; the units characteristics also meet the requirements as follows:Frequency (Hz)Permitted Operating Time

Accumulated (min)Every Time (Sec)

52.5>5>5

52.0>30>30

47.5~51.5Continuous Operation

47>60>60

46.5>10>10

46>2>2

1.3.6 The peak to peak vibration amplitude measured near the bearing journal of turbine shall be 0.075mm during normal operation, which shall not exceed 0.25mm as critical speed passing in speed rise;1.3.7 The power load of the unit is permitted to reach 135MW when the HP heaters are cleared;1.3.8 The unit is permitted to run continuously with low load when the exhaust pressure of turbine increases to 0.0146Mpa (a). The alarm back pressure of turbine is 16.9kPa (a) and trip back pressure is 20.3kPa (a).

1.3.9 The unit is permitted to run for long when the exhaust temperature of steam turbine is less than 79. The max temperature at which exhaust is permitted to operate is 120.

1.3.10 Permitted load variation rate of unit is:

1.3.10.1 From 100% to 50% MCR 5%/min

1.3.10.2 From 50% to 20% MCR and from 20% to 50% MCR 3%/min1.3.10.3 Below 20%MCR

2%/min1.3.11 The pressure after the governing stage must not exceed 10.34Mpa (a) at different working conditions.1.4 General description of steam turbine

1.4.1 Brief introduction of steam turbine proper

1.4.1.1 Steam turbine type is: super-high pressure, primary reheating, double-flow and single shaft arrangement, reaction extraction and condensing type, which characteristics include: combination of HP and IP cylinder, reverse arrangement of through-flow parts, inlets of initial steam and reheat steam centered on the middle part of HP & MP cylinder and radial diffusion double-flow type of LP cylinder.

This units shafting is supported by three points: HP & MP rotor connected with LP rotor by rigid coupling while the LP rotor connected with the generator rotor by semi-flexible coupling, generator rotor expands and contracts forwards and backwards with the thrusting bearing in middle bearing pedestal as the dead point, and HP & MP cylinder expands forwards based on the cross point of longitudinal and traverse key of the middle bearing pedestal. There is an absolute expansion indicator on the front bearing frame with total cylinder expansion of 20-22mm. and the LP outer cylinder expands backward with the cross point of the longitudinal and traverse key in the front of the LP outer cylinder as the dead point.

The turbine unit is 14 meters long in total and arranged on the 9m operation floor, with a combination of HP initial steam stop valve and HP governing valve mounted on both sides in the front which is supported on the holder of main stop valve, 4 flexible HP steam inlet pipes connected with the 4 governing valves and the HP cylinders upper and lower steam inlets respectively, and governing valve controlled by oil servo-motor.

The high pressure nozzle section consists of four groups of nozzle segments, The unit can reach rated power by 3 valves opening fully and the fourth group provides guarantee for the availability of rated power in summer and at low parameters.

HP & MP cylinder is double-floor cylinder with 1 governing stage and 8 pressure stages in the HP part. There is a section of steam extraction led to HP heater #1 after stage 7, and steam exhausted by HP flows through lower cylinders exhaust port and HP exhaust check valve to the reheater, a portion of which is led to HP heater #2 as regenerative extraction. The reheated steam flows to MP part via MP combined valve through two rigid steam inlet pipes. There are 10 pressure stages in MP part with a third stage extraction to deaerator after stage6 and a fourth extraction led to LP heater #4 after stage 8. For MP exhaust part, the upper half is designed to exhaust steam upwards that flows into LP cylinder through 2 flexible cross over pipes with compensation capacity; the lower half has a fifth extraction led to LP heater #5.

The LP cylinder is double flow and has 26 stages, there are a 6th and 7th extraction openings set in LP cylinder that lead extraction to LP heater #6 and LP heater #7 (built-in type) inside the condenser respectively and led out after the stage 3 and stage 6 respectively.This steam turbine has three bearing pedestals in all, in which 3 turbine journal bearings, 1 generator front bearing and 1 thrust bearing are mounted. All bearing pedestals are floor mounted. Besides journal bearing in bearing pedestal #1, there are also main governing set, including main oil pump and emergency governor etc.Two MP combined valves are arranged on the left and right side in the middle of the unit respectively, which may move freely on its bearing surface with expansion of the turbine, the MP governing valve only operates for regulation at below 30% load and opens fully not to take part in regulation in the case where the load is more than 30%.The rotary equipment of steam turbine rotor is mounted on the back bearing pedestal and driven by motor after speed reduction, rotor turning gear speed rotation is 7~8r/min, each bearing is equipped with HP jacking oil system in order to lower the start-up power of rotary equipment and protect all bearings from damage.LP cylinder is equipped with atomizing nozzle type low-load spray regulator inside that may operate to spray automatically in the case where the LP cylinder exhaust temperature is higher than 80 so as to ensure normal operation of the unit.1.4.1.2 Sliding key systemThe sliding key system is the supporting and locating system of stator part, the steam turbine proper supporting and locating mode is: front frame, middle frame and rear frame and exhaust hood frame are fastened on the foundation by means of foundation bolts and back grouting and are equipped with front bearing pedestal, middle bearing pedestal, rear bearing pedestal and LP outer cylinder thereon respectively. Longitudinal keys are arranged on the front frame along the center axis, the front bearing pedestal can move on its frame along the axis. HP & MP outer cylinder upper claws are supported on the front and middle bearing pedestal, the lower claws transverse keys connect with the front and middle bearing pedestal, besides longitudinal keys, there are also transverse keys on some position of the middle frame, and the cross point of longitudinal and transverse key is the dead point of HP & MP stator part, the front bearing pedestal HP and MP cylinder and middle bearing pedestal take this as the dead point to perform axial expansion and contraction. There is a vertical key mounted on both upside and downside of both ends of HP & MP outer cylinder with key way plate fixed on the neighboring bearing pedestal for the purpose of smooth expansion and contraction and keeping cylinder center aligning.1.4.1.3 Thrust bearingThe unit adopts the Michell thrust bearing. The thrust collar integrates with steam turbine, and both its front and back sides are mounted with positive and negative thrust bearing pads with 12 pieces laid on the whole circle of each. And each pad is equipped with a RTD temperature measuring device for measuring its metal temperature. The back of thrust bearing pad rests on erection loop, and erection loop leans against the spheric seating, which gives self alignment effect. Positive or negative thrust of steam turbine bearing operates on the operating pad or non-operating pad separately, and the bearing displacement on thrust pad shall not be more than 0.4mm. The lubricating oil enters between thrust collar and thrust pad via oil inlets on both sides for lubricating, and then flows out from thrust collar outer side, the return oil escapes from the top, and there are two return oil adjusting screws mounted on return oil outlet, which can adjust the oil return quantity to control return oil temperature.1.4.1.4 Journal bearingThis unit adopts elliptic type journal bearing, which consists of a bearing bush cast with Babbitt metal, bearing shell and spheric seating. The bearing is made into upper and lower, two halves that are fixed and positioned by screws and taper pins, the bearing case matches with spheric seating on spherical surface, which gives self alignment effect, and there are four set pieces on the spheric seating for the use of adjustment. Lubricating oil flows into bearing through a hole at lower part of bearing and then flows into bearing pedestal via the bearing end. There is a platinum resistor mounted on the bearing bush that can measure the bearing metal temperature, there is oil from return chute in the bore of locating pin in upper bearing half, which temperature can be measured as that of bearing return oil, and there is HP jacking oil hold at the bottom of bearing bush.1.4.1.5 Shafting

The steam turbine proper shafting consists of HP & MP rotor and LP rotor. Connection between HP & MP rotor and LP rotor relies on the rigid coupling integrated with main shaft forging, and the shims in between two halves of coupling are connected with screws. As configured for the purpose of meeting the requirement of rotor center aligning in assembly, in such a case, the center on both ends of coupling must keep correct and concordant in assembly so as to allow the rotor center line to become smooth and continuous curve in operation. The rigid coupling is very sensitive to the bearing load distribution because of high rigidity, thus its requirements for the assembly technology and shafting aligning are much higher, but it has such advantages as high strength, short rotor length, easy processing and reliable operation.

Semiflexible coupling is used in between LP rotor and generator rotor, such coupling has a corrugated pipe joint on the end coupling connecting with generator rotor, which has certain flexibility, and connects with an minor axis on the other end coupling, and the minor axis covers the generator rotor to transmit the torque by means of interference and key, such semiflexible coupling may allow the unit safety operation not to be affected by slight change in the steam turbine and generator center in installation and operation.1.4.2 Technical specifications of governing system1.4.2.1 The governing system is able to keep idle running of steam turbine at rated steam inlet condition, rated vacuum and full open main stop valve, with speed oscillation value 6r/min.1.4.2.2 The governing system is able to guarantee stable parallel operation of steam turbine and other units.1.4.2.3 The governing system is able to control and guarantee the need of steam turbine incorporating into network and adaptation to changes in speed and load.1.4.2.4 For this unit operating at rated steam conditions and rated speed, the governing system is able to control the turbine speed not to result in the trip of emergency governor as the unit rejects load.1.4.3 Technical specifications of steam turbine control system

1.4.3.1 This unit has three sets of governors: Emergency governor handle to be tripped by operator manually for emergency;Mechanical emergency governor to trip at overspeed; Four governor solenoid valves controlled by ETS, which receive the governing signal of important parameters of steam turbine.1.4.3.2 System function:1.4.3.2.1 Governing function: The governor valve will trip to shut down the turbine for emergency trip as the following parameter exceeds the specified value.a. Speed rises to 110% of rated speed;b. Axial displacement exceeds 1.2mm;c. HP & MP cylinder differential expansion exceeds +8.0 or -3.0mm;d. LP cylinder differential expansion reaches +7.5mm;e. Lubricating oil pressure is lower than 0.06Mpa;f. Back pressure of the condenser is lower than 20.3kPa; g. Peak to peak vibration amplitude of the rotor is 0.254mm;h. Metal temperature of # bearing 1-3 reaches 112, the metal temperature of bearing #4 and #5 reaches 80 or the temperature of thrust bearing reaches 107;i. EH oil pressure decreases to 9.31Mpa;j. Power failure to DEH system;k. Exhaust temperature of LP cylinder reaches 121;l. The oil level of the main oil tank is lower than 1245mm;m. MFT of the boiler;n. Main protection of the generator operates.1.4.3.2.2 Oil injection test function

1.4.3.2.3 Emergency governor test function1.4.3.2.4 Steam turbine reset function

1.5 Heat calculation data of the steam turbine NameUnitRated conditions THATMCRVWOCutting off all HP Heaters

Generator end power kW135,029135,101145,005135,043

Total steam inlet flow of steam turbinet/h407.502410.107440.000368.560

Initial steam pressure /temperatureMPa/13.24/53513.24/53513.24/53513.24/535

HP cylinder exhaust pressure MPa2.5332.5342.7242.677

HP cylinder exhaust temperature312.1311.9317.8321.6

Reheat steam flow t/h335.397335.701360.968354.820

Reheat steam pressure /temperatureMPa/2.33/5372.332/5372.506/5372.463/537

Back pressurekPa5.45.45.45.4

Cooling water temperature32.132.132.132.1

Feed water temperature 244.4244.5248.8171.4

Make-up water flowkg/h0300

Flow into condensert/h284.081282.090303.577298.143

Heat ratekJ/kWh8,402.98,363.98,355.98,630.8

Steam ratekg/kWh3.0183.0363.0342.729

No.1 extraction steam condition MPa/3.552/354.93.56/354.93.832/361.4

No.1 extraction flowt/h22.1423.05124.681

No.2 extraction steam conditionMPa/2.457/312.32.458/312.12.642/317.9

No.2 extraction flowt/h36.87138.25140.589

No.3 extraction steam conditionMPa/0.73/377.90.729/377.60.784/377.50.769/377.1

No.3 extraction flowt/h8.0668.479.1249.863

No.4 extraction steam conditionMPa/0.451/315.80.45/315.40.484/315.30.475/315


No.5 extraction steam conditionMPa/0.251/248.40.25/247.80.269/247.80.264/247.5


No.6 extraction steam conditionMPa0.0670.06650.07180.0705


No.7 extraction steam conditionMPa0.01430.01420.01520.015


Note: Turbine Heat Acceptance condition (THA): means the condition in which the unit can operate safely and continuously with generators net output power of 135MW when the turbine is under rated initial steam and reheat steam conditions, back pressure is 5.4kP, make-up water percentage is 0%, and regenerative system is put into operation all normally and generators efficiency is 98.4, which heat rate is not more than the acceptance value of 8,402.9kJ/kWh.Turbine maximum continue rate (TMCR): means the condition in which the unit can operate safely and output maximum power when the turbine is under rated initial steam and reheat steam conditions, back pressure is 5.4kP, make-up water percentage is 3%, and regenerative system is put into operation all normally and generators efficiency is 98.4.Valve Wide Open condition (VWO): means the condition in which the turbines steam inlet flow is 440t/h when the turbines governing valves are wide open and the other conditions is the same with 2.1.1, which output value is 145.822MW. This condition corresponds to the Boiler Maximum Continue Rate (BMCR).

Chapter 2 Specification of Auxiliary Equipment2.1 Specification of heater

2.1.1 Specification of HP heaterItemUnitHP heater #2 HP heater #1

ModelJG-530-2-00CKJG-530-1-00CK

Design pressure of shell sideMpa3.04.5

Design temperature of shell side350/250390/260

Design pressure of tube sideMpa2020

Design temperature of tube side250260

Feed-water Inlet temperature172.2223.9

Feed-water outlet temperature 223.9248.8

Working pressureMpaTube side 18Shell side 2.64Tube side 18Shell side 3.8318

Working temperatureShell side 317.9/180Shell side 361.4/247.8

ManufacturerQingdao Qingli Boiler Auxiliary Equipment Co., Ltd.

2.1.2 Specification of LP heaterItemUnitLP heater #7LP heater # 6LP heater # 5LP heater # 4

ModelJD-220-1-1JD-300-1-3JD-300-1-2JD-300-1-1

Heating surface area M2200300300300

Design pressure of tube side Mpa2.52.52.52.5


Design pressure of shell sideMpa0.050.40.40.5


Working pressure of tube sideMpa1.7241.7241.7241.724

Working pressure of shell sideMpa0.01520.072570.26930.454

Working temperature of tube side5569.45109.05138.25

Working temperature of shell side5590.63129.9150.6

Manufacturer Shanghai Power Equipment Co., Ltd.

2.1.3 Specification of deaerator and deaerated water tank

2.1.3.1 Specification of deaerator

ClassClass ITest pressure1.374MPa

Model GC-514Pressure drop of nozzle 0.0588MPa

Design pressure0.88Mpa (g)Opening pressure of safety valve0.85MPa

Design temperature 380Operating modeSliding pressure operation

Max working pressure0.78Mpa (a)Corrosion allowance (tank /deaerator)1.6/2.5mm

Rated output514t/hOxygen content of outlet water 7PPb

Inlet water temperature147Outlet water temperature169.3

ManufacturerQingdao Qingli Boiler Auxiliary Equipment Co., Ltd.

2.1.3.2 Specification of dearated water tank

ClassClass IOpening pressure of safety valve0.85MPa

TypeGS-120Test pressure1.374MPa

Design pressure0.88Mpa (g)Effective volume120m3

Design temperature380Total volume140m3

Max working pressure0.68MPaCorrosion allowance (tank /deaerator)1.6/2.5mm

ManufacturerQingdao Qingli Boiler Auxiliary Equipment Ltd.

2.2 Specification of feed-water pump

2.2.1 Feed-water pump and booster pump

Equipment parameterUnitFeed-water pumpBooster pump

ModelFK5G32QG500-80

Number of stagesstage51

Inlet water flowm3/h533.3533.3

Outlet water flowm3/h497.8533.3

Liftm1771.979.6

Inlet water pressureMPa1.480.6837

Outlet water pressureMPa19.181.48

Shaft powerkW2733.9128.7

Rotating speedr/min46862982

Working temperature166.7166.7

Medium density kg/m3900.59900.59

Intermediate bleed-off pressure (stage 2)MPa8

Intermediate bleed-off flowm3/h35.5

Guarantee efficiency%81.3280.84

ManufacturerShanghai Power Equipment Maintenance Works Co., Ltd.

2.2.2 Specification of feed-water pump motor

2.2.2.1 Specification of feed-water pump motor

ItemUnitSpecification

ModelYKOS3700-2

Rated powerkW3,700

Rated voltageV6,600

Rated currentA370

Rated speedr/min2,982

Rated frequencyHz50

Connection type of statorY

Insulation classClassF

Power factor COS0.9

Cooling modeAir-cooled

Temperature rise80

ManufacturerShanghai Motor Co., Ltd.

2.2.2.2 Specification of air cooler of feed-water pump motor


Capacity of coolerkW160

Operating water flowt/h60

Circuit of cooling waterGroup 2

Air pressure dropkPa0.32

Working water pressureMPa0.2-0.4

Max permitted water pressureMPa0.5

2.2.3 Specification of hydraulic coupling

2.2.3.1 Parameters of hydraulic coupling


ModelR17K.2-E

Motor speedr/min2,986

Output speedr/min4,783

Max output powerkW3,000

Slip%3

Scope of speed governing%25-100

Efficiency%94.7

Capacity of oil tankm30.85

ManufacturerGermany VOITH

2.2.3.2 Auxiliary equipment of coupling

ItemUnitAuxiliary oil pumpWorking oil coolerLubricating oil cooler

ModelCB-B125LY54LY16

Oil flowm3/h7.53017

PressureMPa0.25

Cooling surface aream25416

Cooling water flowm3/h12027

2.3 Circulating water system

2.3.1 Specification of circulating water pump

Specification of circulating water pump (double pumps in parallel operation)Specification of circulating water pump motor

Model44LBXA-23ModelYLKK900-10

Shaft power770.3 kWVoltage 6,600V

Lift 23mCurrent 98A

Rotating speed 595 r/minPower 900kW

Flow10,728t/hPower factor 0.86

Efficiency 87.2%Rotating speed 595r/min

Cooling water of bearing90m3/h, 0.3MPa

Mini submergence3m

Manufactured byChangsha Water Pump WorksManufactured byShangyang Electric Machine Co., Ltd.

2.3.2 Automatic back washing strainerItemUnitSpecification

ModelASCS300

Working pressureMPa0.3

Max pressureMPa0.6

Inlet & outlet diametermm300

Manufactured byShanghai Power Equipment Research Institute

2.3.3 Circulating water booster pumpSpecification of circulating water booster pumpSpecification of circulating water booster pump motor

Model10Sh-9AModelY250M-4

Shaft power40 kWVoltage415 V

Lift30 mCurrent A

Rotating speed1,480r/minPower 55 kW

Flow 420 t/hPower factor

Efficiency80%Rotating speed 1,480 r/min

Manufactured byShijiazhuang Kingda Pump Co, Ltd.Manufactured byXian Motor Works

2.3.4 Indoor circulating sump pit blowdown pumpSpecification of indoor circulating sump pit blowdown pumpSpecification of indoor circulating sump pit blowdown pump motor

Model40PV-SPModelY112M-2

Shaft power3.1kWVoltage415V

Lift15mCurrent A

Rotating speed1,800 rpmPower4 kW

Flow 25t/hPower factor

Efficiency34%Rotating speed 2900 r/min

Manufactured byShijiazhuang Kingda Pump Co., Ltd.Manufactured byXian Motor Works

2.3.5 Trash remover of circulating water pump houseSpecification of trash remover of circulating water pump houseSpecification of trash remover motor of circulating water pump house

ModelZSB-3500ModelBWD5-87-5.5

Water head in operation start300mm

Max design water head 600mmVoltage415V

Mesh size3.553 mmCurrent A

Travelling speed of scrubbing brush6~7 m/minPower5.5 kW

Total Number of scrubbing brush4 Power factor

Rotating speed of round brush20.33 r/minRotating speed 87 rpm

Manufactured byJiangsu Yihaun Group Co., Ltd.Manufactured by

2.4 Shaft seal system

2.4.1 Shaft seal

HP & MP seal ring are high & low-tooth labyrinth structure and LP seal ring is flat tooth structure; HP & MP cylinder diaphragm seal is embedded seal, the sealing strip is riveted into the diaphragm with fillet; the seal ring of LP diaphragm seal is mounted in the septalium and fixed with spring leaf.2.4.2 Shaft seal heater


ModelJQ-50-1

Heating surface aream250

Design flow of main condensate flowm3/hTotal flow, 300 minimum

Design pressureMPaTube side 3.1, shell side 0.1

Working pressureMPaTube side 2.00

Test pressureMPaTube side 3.9, shell side 0.125

Design temperatureTube side 100, shell side 100

Working temperatureTube side 60, shell side 100

Net weightt2.23

2.4.3 Shaft seal fan:Specification of shaft seal fanSpecification of the motor

ModelAZY-09.32-020.0-01Model132S

Full pressure9.32kPaPower7.5kW

Speed 2,900r/minSpeed2,900r/min

Flow20m3/minVoltage415V

Manufactured byZhejiang Yuyao Blower PlantManufactured byWannan Electric Machine Co., Ltd.

2.5 Condensate and steam extraction system

2.5.1 Specification of condenser

ModelN-9000Cooling water temperature32.5

TypeSingle shell, bisection, double passes and surface typeNumber of pass 2

Total active cooling surface area9,000 m2Velocity in cooling water pipe2m/s

Design pressure of tube side0.25MPaOuter diameter of cooling water pipe25mm

Design pressure of shell side0.1MPa/VacWater resistance of condenser

Documents

Turbine Operation Procedrue(a)