Grindex pumps solves slurry issues at Coal Fired Power Plants
In Coal Fired Power Plants you will find quite a few sumps that require dewatering or slurry handling submersible pumps. Grindex has numerous pump types that are proven solutions for these applications.
Condensate pit
The pit serves as a collection point for various drain tiles around the power plant. Being a low point of the plant, debris and abrasive solids often end up in the pit along the water. This requires a solution of pumping water mixed with solids.
Grindex Solution
A mid-sized dewatering pump (16HP) is suspended about 12" off the sump floor. A midsized sludge pump (20HP) sits on the sump floor and pumps the settled debris and solids. Being an alternating duplex system controlled by level regulators, it empties the sump automatically when needed. Once the water/debris leaves the sump it ends up in a slag pit where it is pumped out of the plant.
Coal yard lift station
The lift station receives water and coal fines from the car dumper sump and from nearby coal tunnels. As the coal slurry is very abrasive, a pump with high wear resistance is required.
Grindex Solution
The Bravo 40 pump (20HP) was selected due to the hard metal material which offers superior wear resistance. Once pumped out of the lift station, the coal slurry is pumped to ground level right next to the coal pile.
Gas purification - Wet scrubber system
In the scrubber system, sprayed water is removing the solids from the smoke. As the fluid then holds a pH of 14, it's very corrosive and needs neutralization. In this process, acid with pH 3 is mixed with the fluid and pumped between two neutralization pools. An aluminum Master dewatering pump (13HP) was used but suffered heavily from corrosion and lasted only some 4 months before it was all worn out.
Grindex Solution
The dewatering pump Master INOX (13HP) was installed. Being made of 316 stainless steel, this pump can operate in applications that would destroy aluminum pumps in matter of weeks or even days. After being operating for 3 months, it is still as good as new.
This case story can also be downloaded from Grindex Press site together with high resolution images. The address is www.grindex.com/press