Method and system for treating exhaust gas from cement...

Details Method and system for treating exhaust gas from cement... Method and system for treating exhaust gas from cement...

2006-05-23

2006-05-23

Hopkins, Robert A. (Department: 1724)

Gas separation: processes

Deflecting

Centrifugal force

C055S385100, C055S466000, C106S752000

Reexamination Certificate

active

07048784

ABSTRACT:
An exhaust gas treatment method including: (A) a step of treating exhaust gas from cement manufacturing equipment by using a dust collector9to collect dust containing chlorinated organic compounds, and discharging the exhaust gas after the treatment by the dust collector9, and (B) a step of charging all or part of the dust collected by the dust collector9into a place (e.g. a rotary kiln5, a pre-calciner6, and a cyclone4d) having a temperature of at least 800° C. inside the cement manufacturing equipment. The remainder of the dust from step (B) maybe charged into a place (e.g. a raw material supply passage3) having a temperature below 800° C. inside the cement manufacturing equipment, provided the amount of the remainder to be charged is smaller than a certain amount. Chlorinated organic compounds such as dioxins in the exhaust gas can be decomposed efficiently to be made harmless, merely by including simple and low-cost means (e.g. a dust feeding means12, etc.).

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patent: 7-138054 (1995-05-01), None
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patent: 11-246247 (1999-09-01), None
patent: 2000-016844 (2000-01-01), None

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