Slurry Ejectors for transporting Coal Ash.

Fly ash, bottom ash and boiler slag is generated during combustion of coal in Thermal Power Plants. The combined mixture of this fly ash, bottom ash and boiler slag is referred to as Coal ash.
Coal ash is environmental hazardous and hence special care is taken for its recycling in disposal. Coal ash is recycled to makes bricks and used as raw material in cement production. Disposal is done by landfills or by surface impoundments.

In a powerplants the coal ash is generated in the boiler and in the electrical precipitators. This coal ash needs to be transported to the disposal and recycling sites in the power plant premises.

Fly ash which is a major component of coal ash is light in weight and tends to be carried away by winds and air gusts. To avoid that the ash is wetted and the transported through trucks or pipelines.

Slurry Ejectors are essentially liquid ejectors that utilize pumped water for operation.

Slurry Ejectors suck the Coal Ash from the collection point and mix it with water inside the ejector. The mixture of Coal Ash and Water is then pumped out from the Ejector outlet.
Thus the Slurry Ejector also acts as pump and can develop significant head at the outlet This enables the Coal Ash slurry to be pumped to long distances with help of the Slurry Ejector.

Transporting Coal Ash through pipelines as a slurry with the help of a Slurry Ejector also makes it possible to carry out the entire transportation in a closed and contained manner.

Slurry Ejectors are perfectly suited for transporting Coal Ash Slurry because of their inherent characteristics
• Performs dual function of mixing Coal Ash with water and pumping the slurry mixture.
• Ejectors do not contain any moving parts and have large internal passage areas, hence are not vulnerable to clogging by solid particles.
• As they have no moving parts, maintenance requirements are very less. Also it reduces largely the risk of abrupt breakdowns, helps in maintaining the regular production schedule
• Service Water is a commonly available utility and hence no additional infrastructure is typically required.