In 2004, Electric Power Development Co., Ltd (EPDC) carried out wood chip
co-firing test at Matsuura #2 unit 1000MWe thermal power station (Pulverized
Coal Fired Power Station) which is EPDC's own power station.
And EPDC confirmed that wood chip could be co-fired with coal at the rate
of 0.5% which was wood chip co-firing ratio as calorific value base.
・ Wood chip co-firing test at Matsuura #2 thermal power station
The rate of co-fired wood chip is depended on the effect of the coal pulverizer
(coal mill) at the PCF(Pulverized Coal Fired) power station. EPDC carried
out the test of wood chip mixing with coal, using one of the coal mill
at Matsuura #2, and confirmed that the situation of coal mill was same
as the case of 100% coal until 0.5% mixed of wood chip as calorific value.
Then beyond 0.5%, the electricity consumption of the coal mill was increased
gradually, and the pulverizing efficiency of the coal mill decreased gradually.
Based on these test results, EPDC carried out the wood chip co-firing test
using all mill of Matsuura #2 unit, and confirmed that the situation of
combustion e.g. NOx, ignition-loss and environmental protection efficiency
e.g. flue gas treatment were same as the case of 100% coal fired.
・Research of wood chip resources
Based on marketing research, the most useful wood chip resource is wood waste.
However wood waste includes some metal e.g. nail, so it is necessary to
remove these metals from wood waste in order to avoid the affection of
PCF power station.
Some metal in wood waste affect the coal mill e.g. defacement.
And EPDC confirm there is enough wood waste resource around Tokyo aria,
Osaka aria, Hiroshima aria.