Importance

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Abstract

The invention relates to an apparatus for converting sewage-sludge filter cakes into oil, gas and coke by pyrolysis. The apparatus has two dewatering stages--a preliminary evaporating stage and a residual evaporating stage, a conversion stage and a cooling stage. Each of the evaporating, converting and cooling stages are constructed with at least one module. Each module has a housing divided by walls into a transfer chamber at one end and a second chamber at the other end. The second chamber is divided between a feed chamber and a delivery chamber. Between the transfer chamber and the second chamber is a heat transfer chamber. In the heat transfer chamber there are a plurality of first tubes connecting the feed chamber to the transfer chamber and a plurality of second tubes connecting the transfer chamber to the delivery chamber. Conveyors are provided in each of the tubes to deliver solid feed material from the feed chamber to the first tubes into the transfer chamber and then from the transfer chamber to the delivery chamber where the matter is then fed to another module according to the desired treatment. The tubes are spaced apart from each other to permit a heat transfer medium to be fed into and out of the heat transfer chamber.

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First Claim