FI93415C - Slurry treatment plant - Google Patents

Description

93415

SLUDGE MANURE TREATMENT DEVICE

The invention relates to a slurry treatment device as defined in the preamble of claim 1.

5 Most commonly, manure is treated by collecting it in large tanks or basins, usually over a thousand cubic meters, from which it is then pumped to the manure spreading wagon at appropriate times of the year and applied to the fields. The main problem 10 here is the investment cost, as heavy equipment is required for pumping and spreading the slurry and a large slurry tank is expensive to build.

Attempts have also been made to absorb sludge into suitable bedding, such as peat, sawdust or oils, but this has not been possible due to the lack of suitable equipment for mixing the bedding and especially for transferring the rigid mass.

The object of the invention is to eliminate the above-mentioned drawbacks. In particular, it is an object of the invention 20 to provide a novel slurry treatment device which enables the slurry and suitable bedding to be mixed with each other and the finished, homogeneous pulp to be efficiently transferred forward either for use or further processing.

25 As regards the features characteristic of the invention, reference is made to the claims.

The slurry handling device according to the invention comprises a slurry tank with slurry feed openings and a mixing screw with a vertical body tube and 30 threads extending into the tank with power devices for mixing the slurry in the tank. According to the invention, a drain screw, a screw-driven screw conveyor, is arranged inside the body tube of the mixing screw, which preferably extends from the bottom of the slurry tank all the way up the tank above the mixing screw.

In this way, the slurry-litter mass premixed with the mixing screw can be removed from the slurry tank with an empty 2 93415 expansion screw.

Preferably, an opening is provided at the lower end of the body tube, through which the sludge slurry to be removed from the tank can pass the drain plug.

Preferably, a separate bedding feed opening is arranged in the slurry tank, from which bedding can be fed into the tank, e.g. with a suitable feed screw, in a suitable amount. Peat, sawdust, shredded straw or a mixture of these is preferably used as bedding.

In a preferred embodiment of the invention, the drain screw is placed in a separate drain pipe inside the body pipe, whereby the drain pipe also has an opening at the opening in the body pipe so that the mass 15 can pass to the drain screw.

In a preferred embodiment of the invention, an intermediate feed is arranged in the vicinity of the discharge opening at the upper end of the discharge pipe, by which litter is added to the pulp raised from the tank before further processing, e.g. transport by screw conveyor to a composter or storage pit. In this way, more litter is obtained from the sludge tank after it has been pumped up, which ensures that no harmful substances can escape into the environment during further processing.

The treatment device according to the invention has the advantage over the prior art that large slurry storage tanks are not required in the slurry houses, but the slurry can be treated into a non-draining and environmentally friendly pulp with a tank of a few cubes. In addition, the treatment device according to the invention enables simple and easy treatment of the slurry into a homogeneous pulp and transfer to further treatment for storage or use, which has not been possible with current treatment devices.

In the following, the invention will be described in detail with reference to the accompanying drawing, which shows a schematic sectional view of a slurry treatment device according to the invention 93415 3.

The slurry handling device according to the drawing comprises a slurry tank 1, the size of which can be of the order of a few cubic meters. From the feed opening 2 at the upper 5 end of the tank, the slurry can flow freely into the tank. A vertical mixing screw 5 is placed in the tank, which is formed by a body tube 3 and threads 4 placed around it. The mixing screw rests on a bearing 16 with a bearing 16 on the slurry tank cover 17. In addition, the mixing screw 5 is in transmission 18 with a power device 6, such as an electric motor.

Inside the body pipe 3 of the mixing screw, a drain pipe 11 is arranged, inside which there is a drain screw 15 or 7, both of which extend above the body pipe 3 on the lid 17 of the slurry tank, where the drain pipe opens out through the drain opening 13.

At the lower end of the slurry tank 1 the body tube 3 has an opening 9 and the drain tube 11 has an opening 12 at substantially the same height, whereby the mass to be removed from the slurry tank can pass through the openings in a drain screw 7 connected to the power device 8. In addition, a bedding supply opening 25 ko 10 is arranged at the upper end of the slurry tank, from which bedding can be fed to the tank either substantially continuously or always suitably as required.

In the embodiment shown, the discharge opening 13 is arranged to open to a horizontal screw conveyor 30 acting as a conveyor 15, by means of which the mixed slurry-litter mass is transferred for either further processing or storage. In addition, in the vicinity of the discharge opening 13 there is an intermediate feed 14, through which litter can be added to the pulp in order to increase its dry matter content 35 and to ensure that it is not drained.

The slurry treatment device according to the invention shown in the drawing is used as follows.

4,93415

The slurry is allowed to drain freely from the feed opening 2 into the tank 1 as it is generated in the barn or pigsty. Depending on the dimensioning of the tank 1, the mixing screw 5 is started periodically, e.g. once a day, and 5 bedding suitable for the slurry is fed from the bedding opening 10. When the pulp has been made sufficiently rigid and of uniform quality, a drain screw 7 is started, with which the pulp is pumped up from the tank.

The mass protruding from the discharge opening 13 is still somewhat flexible so that it can generally be pumped up from the tank 1. Therefore, when the pulp is further conveyed by a horizontal screw conveyor 15, bedding can be added to it from an additional feed opening 14, which ensures that the pulp does not flow during further processing. When the additional bed is fed to the beginning of the screw conveyor which transports the mass horizontally, the mass does not have to be mixed separately, but is sufficiently mixed in the screw conveyor.

The slurry treatment device 20 according to the invention enables the collection, treatment and processing of slurry or application to fields without expensive suction pumps currently in use, and further ensures that no polluting runoff escapes from the slurry even if the pulp is applied to .

The invention has been described above by way of example with the aid of the accompanying drawing, the various embodiments of the invention being possible within the scope of the inventive idea defined by the claims.

Claims (8)

1. Fertilizer treatment device, to which a floating manure container (1) with associated liquid manure inlet opening (2) and a vertical manure tube (3) and thread (4) provided with stirring screw (5) with associated power unit (6) is provided. ) for stirring the liquid manure inside the container, characterized in that within the flow tube (3) of the stirring screw (5), a substantially extending drain (7) extending throughout its length through its rotation with a power unit (8) is arranged. the remixed liquid manure pulp can be removed from the container (1). Liquid manure treatment device according to claim 1, characterized in that the flow pipe (3), advantageously at its lower end, has an opening (9) through which the liquid fertilizer flows into the flow pipe. Liquid manure treatment device according to claim 1 or 2, characterized in that the liquid manure container (1) comprises a litter feed opening (10) for feeding litter into the liquid manure. Float fertilizer treatment device according to claim 3, characterized in that such litter is used as peat, sawdust, chopped straw or a mixture thereof. Liquid fertilizer treatment device according to claim 1 of claims 1-4, characterized in that the drain screw (7) is arranged in a drain pipe (11) located inside the flow pipe (3). Liquid manure treatment device according to claim 5, characterized in that the opening tube (9) of the drain tube (11) is substantially at an opening (12) at the height of the flow tube (3), through which the mass moves to the drain screw (7). 93415 Float fertilizer treatment device according to claim 5, characterized in that a drainage opening (13) through which the pulp transported by the draining screw is discharged into a stock or to the top of the drainpipe (11) belongs to the upper side of the backpipe (3). a continued treatment such as for composting. Liquid fertilizer treatment device according to claim 7, characterized in that in the vicinity of the drain opening (13) there is an intermediate feed (14) for feeding additional litter in a continuity conveyor (15) to the pulp removed from the liquid fertilizer container (1). .