The Pocerady Power Station
Power Plant Pocerady is situated in the north-west part of the Czech Republic, nearly in the middle among the towns of Louny, Zatec, and Most.
The initial installed power output of the plant was 6 x 200 MW. The power plant construction itself was organized in two stages. The first stage included construction of PP Pocerady I (Units no. 1 to 4). Units no. 1 and 2 were introduced into operation in 1970, Units no. 3 and 4 commenced their operation in the year 1971. Within the second stage, PP Pocerady II was constructed (Units no. 5 and 6). Those units were put into operation in 1977.
Under the framework of coal power plant operation attenuation program, as of 1 January 1994, production unit no. 1 was decommissioned . In the period of 1990 to 2000, the remaining units were subjected to an extensive modernization & environmental program, providing for an achievement of better technology parameters and an ample reserve for ensuring compliance with strict requirements, as stipulated in the new environmental legislation.
The environmental program implementation enabled the power plant management to change fundamentally their business philosophy. The initial business philosophy was based on production of electrical power as a single product. Consequently, large amounts of undesirable emissions and waste came into existence, in parallel with the production.
The new business philosophy focuses on a creation of such a state of technology processes within the power plant, that would enable, apart from electrical power production (being the staple product of the power plant), additionally, production of a whole range of building materials from what used to be waste products. This particular state of affairs has been achieved, together with a significant reduction in the total volume of emissions and waste produced. From the commercial viewpoint, the building materials produced perform quite well on the market. This particular business philosophy includes, in addition, an objective aiming to achieve such a state of circulation of all materials within the production facility, when the power plant may be operated with waste free technology, to the maximum extent.
In October 1994, the first two desulphurized 200 MW Units in the Czech Republic were introduced into operation of PP Pocerady (Units no. 5 and no. 6). The desulphurization equipment with the units is designed on the wet limestone washing principle. In autumn 1996, the three other desulphurized units were put into operation (Unit no. 2, no. 3, and no. 4).
In the power plant near vicinity, consequent to the desulphurization equipment construction, a German-Czech joint venture was set up (KNAUF - Pocerady, s.r.o.), producing gypsum plaster boards from power plant gypsum, the desulphurization process waste. This joint venture has been in full operation since February 1995. A surplus of the power plant gypsum produced, then, is preformed into briquettes and supplied to cement works as a substitute for natural gypsum.
Since 1997, the trends are gradually transformed from the initial hydraulic ash and slag removal processes to dry fly-ash removal and its consequent processing into a stabilized mixture. Within the power plant, the stabilized mixture is used for shaping and impermeable coverage of the former Triskolupy Coal Mine. Then, it can be used in country recultivation and landscaping, as well as material for road earth fills and road construction background layers.
PP Pocerady belongs to the most utilized coal power plants within the Czech Republic. With its power output installed and relatively intensive utilization, it reflects significant levels of influence in both economy and environment of the entire North & West Bohemia region. The power plant only supplies heat power for its internal operation. Both technology and environmental programs implemented ensure reliable, economic, and environmentally conscious operation of the power plant, fully comparable with similar operations in other countries of Europe.
The basic technology concept of all the production units is identical. Since the end of 2001, all the production units are controlled from a single technology control room (STD). From STD, in addition, joint operations of desulphurization and water chemical treatment are controlled. The central control room, then, ensures the electrical power consumption needs and is in charge, in coordination with the national dispatching service, of the dispatching functionality.
The initial I & C system incorporated in the units was replaced, within the process of modernization, by GE Fanuc microprocessor control system. The control process itself is ensured through computer control keyboards from STD control rooms. Desulphurization, coaling, and water management operations are controlled by a Finnish METSO company system.
The power plant burns power brown coal, transported on railways from Most coal basin surface mines, mostly from the Vrsany location. The water is supplied to the power plant from Ohre river. A water inflow structure is constructed at Brezno village, near to the town of Louny.
PG 640 boilers supplied by Vitkovice Company are erected as semi-outdoor structures. The boilers are of once-through design, with steam overheating, double-pass, granulating, and forced-draft.
Turbines, with nominal power output of 200 MW, were manufactured in Skoda Pilsen Company. These are of three-stage, active, condensing design with steam overheating between the high and medium pressure stages, and eight unregulated steam off-takes for turbine condensate and utility water heating.
A. C. generators with the power output of 200 MW (235 MVA, 15 kV) are of three-stage design with direct cooling of stator winding by the condensate. Rotors are cooled by hydrogen.
|Production unit - PoCerady|
|Installed power output||5 x 200 MW|
|Operation commenced in the year||1970 - 1977|
|Desulphurized since the year||1994 - 1996|