TURBINE PROCESS and PARTS

300MW STEAM TURBINE

Turbine is a prime mover. It can rotate pump, compressor, alternator etc.

Types of Turbine:-

            There are three types

            1. Gas Turbine

            2. Steam Turbine

            3. Water Turbine

Gas Turbine:-

            Gas fired directly inside the casing and diffuser, heat power rotates the rotary.

Steam Turbine:-

            Steam will flow inside the turbine through NAZZLE by HP/IP/LP three stages, it can be rotated the rotary.

Water Turbine:-

            Water pressurized then injected through NAZZLE and VANES, it can be rotated rotary.

Pressure should be controlled by PCV (Butterfly Valve)

            The entire turbine should be governed by Governor.

                        (Governor-Speed controlling mechanism for variation of load.)

Types of Governor:-

1.     Hit and miss governing

2.     Quality governing

3.     Quantity governing

Types of Steam Turbine:-

1.     Evaporation Type- More than atmosphere pressure.

2.     Condensate Type-Less than atmosphere pressure.

Types of Water Turbine:-

1.     Impulse Type-Water directly the injected in VANES.

2.     Reaction Type-Water indirectly the injected in VENES.

Steam Turbine Standard Code:-

API 611, API 612

                                                            (API stands-American Petroleum Institute.)  

RPM – Revolution per Minute

                                    Process variables:

           

 Steam Temperature          :           535⁰C

 Steam Pressure                  :           150 bar

 RPM                                       :           3000

 Capacity                                :           300 MW

 Make                                      :           Toshiba, Japan.      

Parts of Turbine:-

•  Bottom Casing

•  Top Casing

•  Rotar HP/IP/LP

•  Diffuser

•  Venes

•  Lube Oil Pump

•  Nazzle

•  Pressure Control Valve

•  Governor

•  Journal Bearing

•  Timing Gear

•  Starting Motor

•  Forced Close Non return valve (FCNRV)

•   Over Speed Tripping Mechanism

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