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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

Documents

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