CV. Wiratama Perkasa Engineering is the representative of valves, steam system and control system
FAQ Technical

Wet Steam On Your Steam Turbine?

WET STEAM can be caused by:

  1. Undesired carry-over of un-evaporated water from the boiler.
  2. Normal condensation of saturated steam in the distribution network or process equipment.

Carry-over from the steam boiler is basically categorised as foaming or priming. This may cause sometimes severe operating and maintenance problems, which not only impact on plant economics, but can have serious safety implications.

In general terms, this is mainly caused by excessive levels of total dissolved solids, which have to be controlled by proper water treatment and boiler blowdown. However, other chemical imbalances, erratic load conditions, poor water level control and/or mechanical boiler defects may be responsible.

The cost of WET STEAM due to carry-over from the boiler(s) can be substantial. If your steam includes say 10% moisture, your steam heated equipment (heat exchangers) cannot achieve more than about 90% of rated capacity.

Carry-over from boilers can scour the pipe internals, increasing both the dissolved and suspended iron content in the Steam turbines, steam line and condensate network, resulting in greatly increased maintenance costs.
This can be insured against by installing an efficient steam separator. We have available designs which can ensure better than 99% dry steam (dryness fraction >0.99)

We introduce : ANGA Double Helix Steam separator

Design & Operation :
The steam separator has no moving parts. The guide element ( a two-starts helix) is welded to the body. One passage of the helix is joined to the inlet an the other to the outlet port.

As the wet unpurified steam enters the steam separator, it flows down the guide element in a spiral motion, after a rotation through 180 degree, above the sump-covering sump, passes to the outlet port.

The centrifugal forces, as well as the impact and swirling effects, Seperate the particles with a heavier specific gravity, such as condensate, boiler sludge, dirt, scale, etc from the lighter fluid Steam.

The separated heavier particles are deposited in the sump. The abrupt rotation of steam flow path from inlet passage to outlet passage prevent the heavier particles to be carried to outlet port.

The heavier particles (water and dirt) are deposit in the sump below the sump-covering plate where they have to be discharge through Float trap.
Individually selection and dimensioning of guide chamber will ensure the optimum discharge.