汽轮机运行规程中英文版 Steam Turbine Operating Regulation -(2)

ASKALE Steam Turbine operating regulation

【OVERSPEED TEST ENABLE(F2)】:Allow standard rotated speed higher than max control speed set point( electronic or mechanical over speed trip test already made) 【F3】：Programmable definition function key 【F4】：Programmable definition function key 2.1.5 Heat system

2.1.5.1Main steam system

Main steam came from AQC through electric isolating valve to quick closing valve. There‘s steam strainer inside quick closing valve, in order to separate water drop and avoid foreign matter get in turbine. 2.1.5.2 Gland sealing system

Steam turbine front,back gland sealing adjust manually. After throttle, main steam enter into front,back gland sealing, adjust according to signal pipe steaming status, then enter condenser valve.

2.1.5.3Vacuum-pumping system

After expand inside turbine steam enter into condenser became water, and make condenser internal vacuum .In order to release the accumulated air during operating, on the both side of condenser equipped with exhaust tube, connected to the entrance of water jet air ejector after merged injected into atmosphere. Water jet pump provide pressure water for water jet air ejector. 2.1.5.4 Condensing system

Condensing system include condenser, water jet air ejector, condensate pump etc.steam expanding active then enter into condenser condense into water, collected in hot well, through condensate pump raising pressure into AQC boiler hot water section economizer,get in deaerator after heating, after deoxidize through electrically driven feed pump into ACQ boiler sharing economizer, after heating one way go in AQC AQC boiler economizer the other way go in SP boiler economizer.

The water jet air ejector will keep condenser Inner vacuum 2.1.5.5Dainage system

Casing drain, sealing pipe drain,steam extraction pipe line drain and control valve rob drain, lead to flash tank, collect as below order :the drainage with highest pressure have longest distance to flash tank or condenser.When drainage expanded in flash tank secondary steam enter into the top of condenser and drainage get into the bottom of condenser.

2.2Generator Unit

2.2.1Generator specification

Generator technical specification: type Unit QF1-J7.5-2 Volume MW 7.5 Cycle Hz 50 Rotate speed r.p.m 3000 Out put voltage kV 6.3 Power factor 0.8 Stator voltage KV 6.3 Stator current A 859.15 Rotorcritcal speed r.p.m ～1560 connection Y

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2.2.2 Generator cooling system introduction

The air cooling system of generator is closed circulation, inside the generator rotor both end equipped air fan, cooling air sucking from telos, through coil, iron tooth, iron yoke release from middle. The exhaust hot air cooling by air cooler then start new circulation

(1 group 4 set)Air cooler specification Heat dissipation kW 260（65×4） Cooling water quantity t/h 80 Cooling air quantity m3/s 9．6 Air temp. aftr cooling ℃ 40 Feed inwater pressure MPa 0.196

2.3 Steam turbine auxiliary device 2.3.1 Deaerator and water tank:1 set 2.3.1.1 Summarize

Deaerator use RCY-40/25 atmospheric deaerator, contribute is 40t/h.Deaerator from top to bottom divide into exhaust steam section, space zone, and packing layer. Condensation water, replenishment water,re-circulating water etc. into deaerator water chamber.deaerated water flow down from the head of deaerator collected into water tank.Effective volume of water tank is 25m3.operating pressure is 0.02MPa. Deaerate heating steam come from in-adjustable extracting point, started heating steam come from mail steam pipeline.

2.3.1.2Regulation

Atmospheric type deaerator Water tank Type RCY-40/25 25m3 effective volume Operating Contribute 40t/h 0.02MPa pressure Water temp. 104℃ Rated pressure 0.1 MPa

2.3.1.3 Deaerator water sourcing:

a. Condensation water of AQC b. Chemistry demineralized water c. re-circulating water of feed pump d. Heater drain water

2.3.1.4 Steam source :

a. Extraction steam of steam turbine b. Throttled main steam

2.3.1.5 Deaerator use condense water and deminerlized water as main replenishment water. Hot well of condenser condense water through AQC economizer into dearator by condensate pump rising pressure

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ASKALE Steam Turbine operating regulation

2.3.1.6 Automatic adjustment of dearator water level is depend on control the quantity of replenishment water. And automatic water level controller is controlled by water level signal or human remote control.

2.3.1.7 Automatic adjustment of dearator pressure is depend on control the quantity of flow in steam. And automatic pressure controller is controlled by pressure signal or human remote control. 2.3.2 Feed water pump

2.3.2.1 Feed pump specification and character

Feed pump specification and character Type DG46-50×6 Flow rate 46m3/h outlet lifting 300m Alowed suction altitude 5m Eficiency 63% Roate speed 2950r.p.m Voltage 380V Equipped power 75kW Min flow rate 15m3/h

2.3.3Technical specification of condenser

Unit Type Cooling surface Tube material Rated steam flow Cooler water quantity Stainless steel tube Copper pipe size? Max pressure of water side Water resistance Reated cooling water temp. m2 t/h t/h root mm MPa MPa ℃

Item Parameter Remark Double tube pass,two way N-1000－4 system,surfac condenser 1000 0Cr18Ni9 50 2710 φ20×0.7 0.294 0.04 27/33（max） Correspondnce to above water quantity , and clean Double tube pass, two way system, surface condenser, can make half side cleaning during operating, but in operating condition load is under 3000kw.

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ASKALE Steam Turbine operating regulation

2.3.4 Water jet air ejector specification

water jet air ejector specification Unit Type / Regular water MPa pressure Regular water t/h consumption Regular sucking kg/h rate Suction chamber Mpa（a） pressure 2.3.5Duplex oil cooler specification 2.3.5.1 Cooling surface：25×2㎡

2.3.5.2 Quantity of cooling water：40t/h

Parameter CS1-15-4 0.4 100 15 0.0075 37/39

ASKALE Steam Turbine operating regulation

2.4 Auxiliary device (pump)

Auxiliary

device specification Specification lifting Type m 100 50 50 2500pa / 65 50 17 300 Floe m3/h 50 12.5 12.5 120 / 36 100 1746 46 Rotate speed r.p.m 2900 2950 2950 2900 / 2900 1450 970 2950

Motor speed r.p.m 2950 2890 3000 1430 2930 1470 970 2970 Motor power kW 37 4 4 0.75 2.2 15 30 132 75 Motor type / Y200L2-2 Y110M-2 Z2-32 Y801-2 Y100L1-4 Y160M2-2 Y200L-4 Y315L2-6 Y280S-2 Voltage V 380 380 -220 380 380 380 380 380 380 RatedcurrenA ame igh pressure 80YL-100 arting oil pump C lubrication LDY12-25×2 ump C lubrication LDY12-25×2 ump AYF2-250-0.xhaust fan 75 urning motor / 100BN60 IS125-100-400 500S-22A DG46-50×6 68.8 8 0.58 5 ondensate Pump 29.4 Water jet pump 57.3 377 irculation water ump otor driven feed ump 139.2

3 Protection and regular test of Steam turbine 3.1 Protection fixed value

3.1.1 When rotate speed higher than 9～11% of rated speed, emergency trip governor act, make emergency governor pilot valve act(safety hammer), make quick closing valve ,adjusting valve close turbine shut down.

3.1.3 Lubricate oil pressure (total)lower than 0.08MPa, make solenoid valve act, quick closing valve, adjusting valve close, turbine shutdown.

3.1.4 When outlet pressure higher than 0.07MPa,make solenoid valve act, quick closing valve, adjusting valve close, turbine shut down.

3.1.5 Metal temp of Bearing bush Higher than 110℃,make solenoid valve act, quick closing valve, adjusting valve close, turbine shut down 3.1.6 Thrust shaft housing temp. higher than 110℃,make solenoid valve act, quick closing valve, adjusting valve close, turbine shut down

3.1.7 Generator internal fault,make solenoid valve act,quick closing valve,adjusting

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