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Steam Turbines

Introduction Salient Features Types of Steam Turbines

Applications

Condensing Turbines | Extraction Condensing Turbines Back Pressure &

Pass-out Back Pressure Turbines

Triveni currently manufactures these turbines up to 25 MW at

Bangalore plant.

Back pressure turbines can either be single stage or multi-stage

which are often used in industrial plants. The turbine serves as a

reducing station between boiler and process steam header.

These turbines can either be used for drive application (sugar

mill drive, sugar fibrizor / shredder drive, pump drives and so

on.) or power generation application in which case the turbine

drives the generator.

These turbines are straight-back pressure type. These type of

turbines find application where back pressure steam is fully

utilized to meet process demands. The power generation is

incidental to the process steam demand.

The back pressure turbine may also have bleed points

(uncontrolled extractions) to satisfy steam demands at medium

intermediate pressures. This provision is applicable when the

bleed (medium pressure) steam volume demand is low and

pressure variations can be tolerated. These turbines are of bleed

cum back pressure type.

The back pressure turbine with one controlled extraction point is

possible. This extraction steam is also used to meet process

steam demand at intermediate pressure when volume demand

is high and pressure variations cannot be tolerated. These

turbines are of extraction cum back pressure type.

In some cases it may be necessary to have both bleed and

controlled extraction steams from the back pressure turbine.

These turbines are of bleed cum extraction cum back pressure

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