US 4,997,357 AGranted

Apparatus for treatment of power station residues

AssigneesHubert Eirich, Paul Eirich, Walter Eirich

InventorsHubert Eirich, Paul Eirich, Walter Eirich, Herbert Durr

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Abstract

The invention relates to a method of treating power station residues in the form of bulk material, particularly the filter ash from power stations, by hydrating the lime content by adding moisture and by further wetting of the bulk material, with an opportunity for constantly feeding in material to be processed and discharging processed material, and also to an apparatus for carrying out the method. In order to provide a method and an apparatus by which large quantities of power stations residues (ash) can be quickly and safely treated at economic and comparatively low cost, it is according to the invention proposed that the bulk material supplied should pass through a succession of different spatially substantially separate treatment zones be moved mechanically at adjustable intensity throughout the entire process, be differently treated in each treatment zone, be caused to react and transported along a reaction line under control.

Claims34

Dependent claims

An apparatus for treating power station residues in the form of bulk material, the residues including lime content, by hydrating the lime content and by further wetting the bulk material, the apparatus comprising:

a premixer including an intake for bulk material and an outlet, means for providing water to the premixer, means for monitoring the flow of bulk material into the premixer, means for measuring the temperature and moisture content of the bulk material flowing into the premixer, means for monitoring the flow of water into the premixer, means for measuring the weight of the contents of the premixer, means for mixing the water and the bulk material in the premixer to form a premixture, and means for exhausting the premixed material from the premixer through the premixer outlet;
conduit means for conveying the premixer material to a primary mixing means;
primary mixing means including a rotatable mixing drum, the mixing drum having an intake for receiving premixer material and an outlet, the mixing drum having a rotational axis inclined with respect to the vertical to induce gravitational flow of material fed into the intake from the drum intake to the drum outlet, means for rotating the mixing drum, means for measuring the weight of the contents of the mixing drum, and means varying the angle of inclination of the rotational axis;
means for conveying the material from the drum outlet to an agglomerator;
an agglomerator for agglomerating material received from the primary mixing means, the agglomerator including means for measuring the weight of the contents of the agglomerator, mixing means for agglomerating the contents of agglomerator;
and means for exhausting the contents from the agglomerator;
and means for controlling the roational speeds of the premixer mixing means, the drum, and the agglomerator mixing means, the angle of inclination, the flow of water to the premixer, and the dwell time of the water and bulk material in the premixer, as a predetermined function of the flow of bulk material to the premixer, the weight of the contents of the premixer, the weight of the contents of the drum, and the weight of material in the agglomerator.

4 more elements

An apparatus for treating power station residues in the form of bulk material, the residues including lime content, by hydrating the lime content and further wetting the bulk material, the apparatus comprising:

a premixer including an intake for bulk material and an outlet, means for measuring the weight of the contents of the premixer, means for providing water to the premixer and means for controlling the flow of water to the premixer, means for mixing the water and the bulk material in the premixer to form a premixture, and means for exhausting the premixture from the premixer through the premixer outlet;
means for conveying the premixture to at least one rotatable drum, the drum being substantially open at both ends and rotatable about the central axis, one open end portion of said at least one drum defining an inlet zone, the other open end portion defining an outlet zone;
the ratio of the length of the at least one drum to the greater inside diameter of the at least one drum being greater than 2:1;
the central axis of the at least one drum being oriented with respect to the horizontal to induce gravitational flow of the bulk material;
means for varying the angle of inclination of said drum axis;
primary mixing means consisting of at least a section of said drum the inner wall of said section of the drum being lined with elastic material over the length thereof
means for measuring the temperature of the bulk material within the primary mixing means;
means for the delivery of treatment fluids into the primary mixing means and
means for controllably rotating the at least one rotatable drum.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/408,478Filed 15 Sep 1989 · continuation
Priority: DE 360476014 Feb 1986
Granted: 5 Mar 1991
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

C04B 2/063
With addition of substances, e.g. hydrophobic agents ; Slaking in the presence of other compounds: slaking of impure quick lime, e.g. contained in…
B01J 2/12
Processes or devices for granulating materials , e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g.…
C04B 2/08
Slaking: devices therefor
B01J 2219/187
Details relating to the spatial orientation of the reactor: inclined at an angle to the horizontal or to the vertical plane