| 摘要 |
<p>PCT No. PCT/CH96/00252 Sec. 371 Date May 15, 1998 Sec. 102(e) Date May 15, 1998 PCT Filed Jul. 8, 1996 PCT Pub. No. WO97/02864 PCT Pub. Date Jan. 30, 1997Mercury-contaminated substances are fed through a shredder to a loader that loads a rotary tubular kiln, in which a mercury content is evaporated by a primary burner. A temperature of an unlined rotary kiln is monitored from an outside at various points over an entire length, by infrared sensors. The thus acquired data are supplied to a regulating unit that regulates fuel supply and primary air supply through various control lines. Burned gas is supplied through a duct to a cyclone separator in which solids are separated and returned to the process. The gaseous substances are fed through a postcombustion chamber of a quench to a washer in which mercury is removed. The residual gas reaches a chimney through an active coal filter. This process is particularly easy to control, economical and allows a particularly low residual mercury content to be reached, for example less than 0.1 ppm, in a residual combustion product.</p> |
