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Gypsum Dewatering Plant for Units 1 to 6 at the Maritsa East 2 TPP
Under our contract with the Maritsa East 2 TPP for conformity assessment of the investment project, construction supervision and engineering pursuant to the FIDIC conditions for design projects, construction, procurement and commissioning (The Yellow Book) of the Gypsum Suspension Dewatering Equipment Construction for Blocks 1 to 6 of the Maritsa East 2 TPP project, in conjunction with our duties, we performed the following:
The Maritsa East 2 TPP is the largest Thermal Power Plant in Bulgaria. It is one of the three Power Plants in the Maritsa East Complex which is situated in the south west part of the country. The Plant is located 280 km away from Sofia, and 60 km away from Stara Zagora. It is built on an area of 512 ha in land of Radetski village. East of it is the Ovtscharitsca Dam. The TPP 2 has a total installed output capacity of 1465 MW, and it comprises eight Units, each complete with a desulphurisation equipment. The TPP works with local lignite coal mined in the Maritsa East's mines.
The Agreement for Gypsum Dewatering Plant for Units 1 to 6, was a contract for engineering, equipment supply, construction and commissioning (EPC), at a fixed contract price under the FIDIC requirements (The Yellow Book).
The project was funded though the Kozloduy EBRD fund.
The equipment serves to separate the water from the gypsum suspension resulting from the work of the desulphurisation equipment.
After the hydrocyclones of the desulphurisation equipment, the gypsum suspension has a solid content of approximately 50% and is temporarily stored in a tank.
Using pumps, the gypsum suspension is fed from the tank through pipelines to vacuum filters for water extraction.
Using two conveyors, the dewatered gypsum mass can be fed in two directions – for filling and transportation by road, or it can be stored temporarily outdoors near the equipment.
The water separated from the gypsum suspension is returned to the cycle of the desulphurisation plant.