| 摘要 |
<p>PROBLEM TO BE SOLVED: To decrease the amt. of dioxin by executing resin monomerization and decrease of the amt. of the dioxin with secondary coolers after cooling and dust removal of dioxin-contg. waste gases and washing the gases with water after the absorption by calcium clay and the cracking by irradiation with UV rays. SOLUTION: The materials to be incinerated are housed into an incineration furnace 11a and a burner 5b is ignited to burn the materials. Combustion gases are sent to a top burner chamber 3b and while these gases are brought into contact with catalysts 9b, the gases are sent to the secondary coolers 16b, 17b, where the gases are cooled. PCB is thermally cracked by metallic reduction in the secondary cooler 16b. The amt. of the dioxin is decreased by treatment with absorbents, such as silicate, calcium and magnesium moldings, in the secondary cooler 17b. Further, the gases are irradiated with the UV rays in an underground flue 19b and are cracked by contact with ceramic balls. The gases are then washed in a washer 22b and are discharged to a discharge chimney 24b from a calcium adsorbent tank 23b. As a result, the amt. in 1m<3> of the dioxin is decreased to about 0.01 to 0.2g.</p> |
