High Pressure High Temperature Boiler
Our advanced boilers are based on a high pressure and high temperature technology. The increased steam parameters accelerate the steam flow and create significant improvements in the electrical efficiency of the plant.
Improved efficiency: DP CleanTech implements measures to recover heat wherever possible and maximize thermal efficiency. A low outlet flue gas temperature (120-130 C) and efficient combustion result in higher boiler efficiencies (90%-92%).
Improved availability: The ash residue resulting from combustion of biomass fuels has a high alkali metal content that can lead to corrosion. The SOx and Cl found in the flue gas can cause both high and low temperature corrosion and ash fouling. Our biomass boiler technology uses specially modified structures, selected metals and special measures such as the following to inhibit such problems:
• A patented air pre-heater that is heated by boiler feed water instead of flue gas, which causes corrosion.
• The super heater pipes have no fins, which would otherwise block the gas path.
• The super heater’s high pressure zone uses special anti-corrosion material.
• The air pre-heater is coupled with a pipe flue gas cooler, which enables a lower flue gas exit temperature (i.e. higher boiler efficiency). It also reduces corrosion in the cold end of the flue gas cooler, which is a common problem in most biomass boilers.
• 3 stage combustion air and 4 stage steam super heaters make the boiler very flexible in terms of the type and moisture content of the fuel.
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