DP Water Cooled Vibrating Grate

DP’s Water Cooled Vibrating Grate (WCVG) is a grate technology developed specifically by DP for the high efficiency firing of biomass at the lowest possible emission rates. It is an integral component to the DP boiler product range, and is a highly reliable and proven technology which has been refined and optimized by DP through many years of operational experience and pioneering modifications. It has been fully integrated with DP’s patented combustion system to produce the most efficient High Pressure, High Temperature straw-fired boiler technology in the world. 
 
The Water Cooled Vibrating Grate is a well-established grate system that provides an intermittent vibration for conveying and distributing fuel evenly, and continuous discharge of fuel ash. It is particularly suited to biomass fuels and has a very efficient carbon burnout rate, which allows an increase in over-fire air, and a subsequent reduction in the amount of thermal NOx created. It has few moving parts, and therefore has low maintenance requirements.  
 
The Water Cooling system provides the necessary cooling to reduce heat damage to the grate and maintain the long term integrity of the grate surface. Heat damage to the grate - such as warping - can lead to the need for additional combustion air which reduces efficiency.

Benefits Advantages and Benefits

Engineering DP Water Cooled Vibrating Grate

Designed Parameters (30MW power plant solution)

Number of components Heat release primary air nozzle diameter sustained vibration time vibration pause time
4 1.1-1.5 MW/m2 3-6 mm About 10 seconds About 200-500 seconds
NUMBER OF COMPONENTS 4
HEAT RELEASE 1.1-1.5 MW/m2
PRIMARY AIR NOZZLE DIAMETER 3-6 mm
SUSTAINED VIBRATION TIME About 10 seconds
VIBRATION PAUSE TIME About 200-500 seconds


 

Project Case Studies

Region Fuel PDF Detail
Maribo-Sakskøbing, Denmark Straw  
Liaoyuan, China Straw  
Fynsværket, Denmark Straw  
Dangshan, China Straw  
Shanxian, China Waste wood