turbine eng
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MITSUBISHIMechanical Drive
Steam Turbine
MCO_ST_2016.1_ENG _W
© 2016 MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION All Right Reserved.
http://www.mhicompressor.com/
MCO Web site:MCO Web site:
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For PTA Plant
(Integrally Geared Compressor Drive)
For Mega Ethylene PlantWorld’s first Floating LNG Facility For PDH Plant
Methanol Plant Fertilizer Plant Ethylene Plant
Application line up
LNG, Natural Gas Liquids (NGL), Refinery, Gas to Liquid (GTL)Upstream
Downstream
and other plants including Floating LNG, Industrial Power Generation and so on.
Ethylene & Derivatives, Ammonia / Urea, Methanol, Air Separation, Propane dehydrogenation (PDH), Nitric Acid
Blade
Rotor
Thrust bearing
Labyrinth seal
Trip & Throttle valve
Casing
Diaphragm
Governing valve
Extraction control valve
Journal bearing
Mitsubishi Mechanical Drive Steam Turbine
Mitsubishi Heavy Industries Compressor Corporation (MCO) has been buil ding steam turbines for almost
one century. Mitsubishi mechanical drive steam turbines are being accepted favorably as smooth, economical,
reliable turbines by all our customers.
Today, MCO is one of the leading manufactu rers of steam tu rbin es of all types. The first mechanical drive
turbine from our Works was delivered in 1958. Since then, we are a leading global provi der of steam turbines
for the petrochemical industry and oil & gas field. Mitsubishi steam turbines have established a world-class
reputation for reliability and high performance achieved through cutting edge technologies.
Stable superior performance
Quick and excellent After-sales service
Easy maintenance
High speed and Compact design
Reliable long term operation
Advantage of Mitsubishi Mechanical Drive Steam Turbine
Back Pressure Turbine
Condensing Turbine
Automatic Extraction / Induction Turbine
Back pressure type turbines efficiently utilize a large quantity of process steam, with the exhaust steam available
for process heat or for the other steam–driven operations, such as low–pressure turbines.
Condensing type turbines, which are highly economical for variable speed operations, can be directly connected to
high speed compressors, thus providing a drive of a minimum initial cost.
Where controlled power and process steam pressure are required, the use of the automatic extraction / induction turbine is
highly desirable. Within capacity limits, the Mitsubishi automatic extraction turbine can supply varying amounts of extraction
steam at constant pressure, while maintaining the required load output by governing the amount of steam admitted to the
low-pressure part of the turbine. MCO is well experienced in induction turbine and extraction / induction turbine.
Type and Characteristic
Technical Evolutions of Steam Turbine
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Type of
Mitsubishi Mechanical Drive Steam Turbine Design Features
0
20,000
40,000
60,000
80,000
100,000
120,000
140,000
0 10,000 12,000 14,000 16,000 18,0002,000 4,000 6,000 8,000 20,000
Application Range
T u r b i n e M
a x O u t p u t ( k W )
Turbine Max Speed (rpm)
Model No: 9 and over
Model No: 8
Model No : 5
Model No: 4
Model No : 3
Model No: 7
B: Back pressure turbine
EB: Extraction back pressure turbine
C: Condensing turbine
E: Extraction condensing turbine
DE: Double extraction turbine
MX: Admission condensing turbine
H: High inlet steam model
L: Low inlet steam model
DF: Double flow
TF: Triple flow
MC: Multi-casing
BD: Both end drive
SG: Geared turbine
Model size
(from 3 to 11)
Turbine type Working steampressure and temperature
Number of stage
Special type
5 E H 7 BD
Model Code
Back pressure turbine Extraction back pressure turbine Condensing turbine Admission condensing turbineExtraction condensing turbine Double extraction turbine
- TTV start up
TTV start up is MCO’s traditional design. This start up
provides the uniform heating of turbine casing . It prevents
the deformation of turbine casing d ue to the unequal
heating.
- GV start up
MCO applies GV start up if customer request that
procedure. MCO has a lot of experi enc e for this start
up. GV start up pro vides the easy start up for operator.
Start up Philosophy
For turbine stat up, MCO has two start up procedure.
Governing system & Safety device
Mitsubishi Mechanical Drive Steam Turbine can
employ any type of electronic governor that is available
in the market. MCO can provide combined compressor
and turbine control system as requested.
Three safety devices can be applied.
(i) Dual electro-hydraulic solenoid-operated valve
(ii) Dual electronic overspeed circuit
(iii) 2 out of 3 voting overspeed trip device
- Governing System - Safety Device
E/Hactuator
Control oil
Drain oil
Power piston
2 out of 3Overspeedtrip module
(option)
Electronic
governor
Operation
panel
DCS.
etc.
External signal
Pilot valve
Control oil supply
Orifice
×2 3
×3
Dual 2 way solenoid valve
Speed sensors(Magnetic pick-ups)
Manual trip buttonEmergency oildrain at trip
Orifice
Reset button
Extraction steamnon-return valve
Emergencytrip piston
E/H
actuator
Pilot valve
Powerpiston
Trip & throttle valve
Feedback lever
Pilot valve
Steam inlet
Emergencytrip piston Governing
valvesExtractioncontrol valves
Feedbacklever