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Business and Technology : Biomass Effective Application Facility (High efficiency dioxin removal system) |
We completed a woodchip firing boiler for Hakozaki Utility Co.,Ltd at Fukuoka coastal Area. Hakozaki Utility Co.,Ltd. is a company to supply utilities such as electricity and steam with Hakozaki Food Industrial Complex and to have a plan to be able to continue daily 24- hour operation, yearly 320-day operation. To cope with the environment problems, Bag filter and Thermal resolution treatment furnace have been installed for exhaust gas system and ash system respectively to have a high removal efficiency against dioxin from exhaust gas and ash.
BOILER SPECIFICATION & OPERATION DATA CHART
| Boiler Type |
Bi-Drum, Natural circulation, Yoshimine H-1000 type |
| Combustion method |
Travelling stoker with Pneumatic spreader |
| Fuel |
Wood Chip 13.18 MJ/kg (L.H.V.) |
| Steam Evaporation |
29.01 t//h |
| Steam Pressure |
1.25 MPaG |
| Steam Temperature |
220 ±9 ゜C |
| ITEM |
UNIT |
DESIGN |
ACTUAL |
| Boiler Spec. |
Boiler efficiency |
% |
84 |
84 |
| Flue Gas |
Dust emission |
g/Nm³(O2=6％) |
0.05> |
Under 0.001 |
| SOx emission |
ppm(O2=6％) |
- |
51 |
| NOx emission |
ppm(O2=6％) |
200> |
190 |
| TEQ of Dioxin |
ng-TEQ/Nm³(O2 = 12％) |
0.1> |
0.00072 |
| Main Ash |
TEQ of Dioxin |
ng-TEQ/Nm³ |
0.3> |
0.01 |
| Fly Ash |
TEQ of Dioxin |
ng-TEQ/Nm³ |
0.3> |
0.01 |
As shown in the above figures, excellent achievement has been fulfilled that exhaust gas and ash dioxin content figures are about 1/140 and less than 1/30 of environmental limit respectively.
Outline Flow Chart
