Process for the combined incineration of sewage sludge and refuse
CA 2090419 C · Owner: Scholl, Kurt · Inventors: Nuesch, Peter; Scholl, Kurt; Kunstler, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The purpose of the invention is to develop a process in which sewage sludge from communal and industrial waste water treatment installations can be incinerated together with refuse in refuse incineration plants with the least possible damage to the environment, a favourable energy balance and simple technical means. According to the invention, the sewage sludge (4) pre-dewatered , to a dry matter content of 20 to 30 % is taken into a rotary kiln (1) and a couterflow of flue gas (7) from a refuse incineration plant (2) at 600 to 900 ° C, is passed through the rotary kiln. The vapours (8) thus formed are injected into the refuse incineration plant (2) for subsequent burning and thus …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 26, 1992 and granted November 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.