Coal-fired power plants belong to the group of thermal power plants that generate electricity from coal.

The coal is crushed, dried, and ground in a mill. Together with preheated combustion air the powdered coal is blasted into the furnace and burned at temperatures of approximately 1832°F. The furnace is surrounded by the steam generator which comprises a tightly packed pipe system with boiler water flowing through. The water is heated up and thus fresh steam is generated with a pressure of approximately 2900 psi to drive a turbine. The flue gases escape from the furnace, pass through different gas scrubbers and are released into the atmosphere through the stack. The steam, after leaving the turbine, is cooled down to water and recharged into the boiler system again.

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Use of gas analysis for e.g.

• Optimum adjustment of combustion components (fuel cost reduction, profitability of the plant operation)
• Performance control of SCR's and scrubbers
• Monitoring emission concentrations for compliance with regulations
• Safety of personel and plant (CO monitoring)
• SCR optimizing - measuring NO_x to determine ammonia injection grid performance. Multiple analyzers can be used simultaneously for profiling ammonia injection rates

Process flow chart of a coal-fired power station with measuring points

Measuring point locations and analysis tasks

• MP 1 at the furnace for controlling constant combustion and air value, identification of CO nests and providing reliable operation
• MP 2 at the furnace outlet for combustion control and optimization (profitability)
• MP 3 at the denitrification plant for performance control
• MP 4 at the stack for emission monitoring (compliance with regulations)

Typical values of a coal-fired power station

The 350’s intelligent analyzer design delivers valuable, multi-port sampling, data logging, and graphing capabilities that are fast and easy. Valuable process data are vividly displayed in less than an hour from arriving on site. The time saving convenience of Testo’s patented gas path eliminate the need for rolls and rolls of heated sample lines. Simply hang the 7-pound analyzer at the port location to take advantage of the unique high velocity sampling features.

The testo 350 offers cutting-edge data handling capabilities. Multi-analyzer
testing from two to 16 analyzers at a time provides the greatest versatility and
most accurate real-time portrayal of your process. The Testo BUS system communicates up to the minute, real-time process data in table form, histogram or graphic display.

For fast combustion troubleshooting the multi-point O2 profile is ideal, or quickly balance the ammonia injection grid by targeting the multi-point NOx measurements. Automatic real-time data logging makes data reduction and interpretation easier and more effective than ever before.

Contact Testo for special SCR package pricing.

Warning!

For measurements after the electrostatic filter, the sample probe must be grounded to avoid dangerous static electric shocks.