Sludge treating process and apparatus
OwnerDerek J. Barrinventor
Life of this patent
Estimating the term…
Abstract
In a continuous process for drying a sludge composed of combustible material and water, the wet sludge is first mixed with a proportion of material which has been dried in the process and is then fed into a hot gas stream from a burner. The hot gas stream carries the mixture along and dries it, and a proportion is tapped off and mixed with the incoming wet sludge. A part of the remainder is fed, with supplementary fuel, if necessary, to the burner to create the hot gas stream. The rate of fuel supply is varied in dependence on a temperature of the hot gas stream when it exhausts from the mixture drying operation.
Claims5
A continuous process of reducing a wet sludge, said process comprising forming a mixture of the wet sludge and a dried mixing material;
- feeding the mixture into a hot gas stream issuing from a combustor which gas stream dries the mixture to produce dried material and an exhaust gas stream;
- conveying a first part of the dried material to be mixed with the wet sludge, the first part of the dried material being the dried mixing material;
- conveying a second part of the dried material to the combustor at a rate which varies in dependence on a temperature of the exhaust gas stream and combusting said second part of the dried material in the combustor to maintain said temperature constant at a predetermined value.
Dependencies are inferred from the claim text.