Summary of key measures aiming to reduce air polluting emissions

Between 1992 and 1999, important measures were implemented in CEZ, a.s. power plants, aiming to ensure operation conditions corresponding with requirements stipulated in the Czech Republic legislation.

In Power Plant Tisova, the following projects were implemented:

K 9 (B 6) boiler equipment with new three-section electrostatic precipitators, in the year 1992,
K 5, K 6 boilers decommissioned in the year 1992, and subsequently disassembled,
K 4 boiler decommissioned in the year 1993, and subsequently disassembled,
1st fluidized bed boiler (K 11) constructed and introduced into operation, in the year 1996,
K 2, K 3 boilers decommissioned in the year 1995, and subsequently disassembled,
2nd fluidized bed boiler (K 12) constructed, and in the year 1998 introduced into operation,
K 3, K 4, K 5, and K 6 boiler desulphurization equipment constructed,
K 1 boiler decommissioned in the year 1997, and subsequently disassembled,
K 7, K 8 boilers decommissioned in the year 1998.

In Power Plant Prunerov 1, the following projects were implemented:

K 3, K 4, K 5, and K 6 boiler electrostatic precipitators reconstructed,
K 3, K 4, K 5, and K 6 boilers - replacement of burners and combustion space adjustments aiming to reduce nitrogen oxide and carbon oxide emissions (primary measures),
K 3, K 4, K 5, and K 6 boiler desulphurization equipment constructed,

In Power Plant Prunerov 2, the following projects were implemented:

K 21, K 22, K 23, and K 24 boiler electrostatic precipitators reconstructed,
K 21, K 22, K 23 , K 24, and K 25 boilers - replacement of burners and combustion space adjustments aiming to reduce nitrogen oxide and carbon oxide emissions (primary measures),
K 21, K 22, K 23, K 24, and K 25 boiler desulphurization equipment constructed,
K 25 boiler reconstructed, for a reduction of emissions of nitrogen oxide and solid state contaminating substances,
installation of natural gas pilot burners, as a substitution for environmentally unfriendly heavy oil (mazut) burners in K 21, K 22, K 23, K 24, and K 25 boilers.

In Power Plant Tusimice 1, the following projects were implemented:

operation discontinuation of B 6 unit in 1991, B 1 unit in 1992, and B 2 unit in 1993,
Power Plant Tusimice I boilers - sealing of electrostatic precipitators and reconstruction of electrostatic precipitator control boxes,
Power Plant Tusimice I boilers - APOLLO burnt gas conditioning system introduced, in order to reduce emissions of solid state pollutants,
B 3, B 4, and B 5 boiler decommissioning in the year 1998.

In Power Plant Tusimice 2, the following projects were implemented:

K 21, K 22, K 23, and K 24 boilers - reconstruction of burnt gas flow distribution in electrostatic precipitators; sealing and optimizing of boiler electrostatic precipitator cleaning systems,
K 21, K 22, K 23, and K 24 boilers - substitution of heavy oil (mazut) burners for natural gas burners,
K 21, K 22, K 23, and K 24 boilers - desulphurization equipment constructed and put into operation in the year 1997,
K 21, K 22, K 23, and K 24 boilers - reconstruction of pulverized fuel burners, modifications of burn-out air burners, and boiler sealing, in order to reduce nitrogen oxide emissions,
K 21, K 22, K 23, and K 24 boilers - implementation of measurements of emission output into the desulphurization control system, in the year 1997.

In Power Plant Pocerady, the following projects were implemented:

B 1 unit operation discontinued, in the year 1994,
B 2 boiler electrostatic precipitator replaced for a new one, with a guaranteed concentration of solid state pollutants behind the precipitator, of 50 mg.m-3,
B 2, B 3, B 4, B 5, and B 6 unit - unit control verification system reconstructed and combustion air control implemented, in order to reduce nitrogen oxide and carbon oxide emissions,
B 3, B 5, and B 6 unit boiler electrostatic precipitator replaced
B 2, B 3, B 4, B 5, and B 6 unit boiler desulphurization equipment constructed,
B2, B3, and B4 unit boiler modifications, in order to reduce carbon oxide and nitrogen oxide emissions down to 500 mg/m3.

In Power Plant Ledvice, the following projects were implemented:

K 2 and K 3 boilers - electrostatic precipitators reconstructed, (mechanical separators replaced by the electrostatic precipitators, meeting the demands of the Act no. 309 / 1991 Coll., applicable to emission limitations for new (energy) sources),
K 1 boiler - implementation of Apollo burnt gas conditioning system, in order to reduce concentration values of solid state pollutants,
B 1 unit - attainable power output reduced from 200 MW to 185 MW, in the year 1996,
K 2 and K 3 boilers - desulphurization equipment constructed and put into operation in the year 1996,
K 1 boiler operation discontinued in December 1998; a fluidized bed boiler constructed at the location of the disassembled K 4 boiler, and introduced into operation in the year 1998.

In Power Plant Melnik 2, the following projects were implemented:

K 9 and K 10 boilers - measures implemented, in order to reduce nitrogen oxide and carbon oxide contents in boiler burnt gas,
K 9 and K 10 boilers - desulphurization equipment constructed,
K 7 and K 8 boilers disassembly preparation, in the year 1999.

In Power Plant Melnik 3, the following projects were implemented:

K 11 boiler - electrostatic precipitator power supply control boxes replacement
K 11 boiler - measures implemented, in order to reduce nitrogen oxide and carbon oxide contents in boiler burnt gas,
Desulphurization equipment for K11 boiler constructed.

In Power Plant Porici, the following projects were implemented:

K 3 and K 4 boilers - semi-pulse electrostatic precipitator power supply installed,
FK 7 atmospheric fluidized bed boiler constructed (1994 -- 1996),
K 5 and K 6 boilers removed, and FK 8 fluidized bed boiler constructed in their location, instead,
K 1 and K 2 boilers - APOLLO burnt gas conditioning system introduced, in order to reduce solid state pollutants and nitrogen oxide emissions,
K 3 and K 4 boiler reconstruction implemented in the year 1997, in order to achieve required emission limitations applicable to nitrogen oxide and carbon oxide quantities,
K 1 and K 2 boiler operation discontinued towards the end of 1998.

In Heat Plant Nachod, the following projects were implemented:

K 4 boiler - cloth filter and dual fuel burners (natural gas auxiliary heating) installed,
K 5 and K 6 equipped with dual fuel burners (heating oil and natural gas),
K 12 boiler converted to natural gas.

In Heat Plant Dvur Kralove, the following projects were implemented:

K 3 boiler - cloth filter installed,
K 1 and K 2 boilers reconstructed, including natural gas branch line construction.

In Power Plant Detmarovice, the following projects were implemented:

K 1, K 2, K 3, and K 4 boilers - primary measures adopted, in order to reduce nitrogen oxide and carbon oxide emission quantities
desulphurization equipment for all the power plant boilers constructed.

In Power Plant Hodonin, the following projects were implemented:

replacement of six dry bottom boilers with two fluidized bed boilers, each having 170 t/hour power output rate (lignite fuel),
13 MWt emergency boiler introduced into operation in the year 1998 (light fuel oil).