SE513738C2 - composting Machine - Google Patents

Abstract

A method and a device (1) for waste fermentation with a first fermentation phase (prefermentation) arranged in a special in the machine placed transportation screw (3). The transportation screw (3) feeds waste material towards a counterstay, so that a counter pressure is built up in the transportation screw. Essentially the whole screw is thereby filled with material and at the same time air and/or oxygen and/or liquid are supplied to the material in the tranportation screw under pressure by means of the tubelike screw shaft.

Description

513 738 2 Since the methodology encompassed by the invention has a different but as simple mechanical complexity as existing ones solutions, material costs will be lower and products can transported and handled more smoothly, at the same time as they require less space on the stand.

The air or oxygen supply in the tube, there the composting material is together with the feed screw, takes place under pressure via the tubular screw shoulder. This means that composting material can be dense and in principle fill the entire drum, partly that the oxygenation can better controlled.

The controlled process entails considerably less odor in the environment than the method with fan air driven through a large drum. If oxygen is used, this effect will be optimal.

Device with stack-building system according to initially reported method is in principle known by manure transport from animal stables takes place via a screw conveyor, which opens from the bottom in the middle the manure stack plate. This is a unique stationary function. The object of the invention is to apply it described basic principle and at the same time make extra use of benefits. The tube of the composting machine protrudes into the formed one the post-composting stack directly on top of the soil on which the stack is located. When the stack has grown to the desired size through the addition from below can the composting machine moved a short distance or allowed to move due to the reaction forces from the discharge from the tube.

The movement should not be so long that the mouth of the tube is pulled out completely out of the stack. In this way, step by step one is formed elongation of the stack so that it takes the shape of a elongated ace in which post-composting takes place at the end, which is closest to the machine, while completely finished soil is available pick up at the end furthest from the machine.

An embodiment of a device according to the invention is described below in connection with the appended claims the drawings in which Fig. 1 shows a composting machine with the tube partially protruding into a long stack or ace off 513 738 3 ready-composting material, while Fig. 2 shows connections for air or oxygen as well as water or other composting process-affecting liquid. Fig. 3 shows a execution of the screw aimed at composting it the material must be alternately compressed and allowed to expand again while receiving oxygenation and any fluid.

Several such screw sections at certain intervals may occur on the screw. The screw drive is arranged so that the compost material can be driven both forwards and backwards to allow, for example the mass to take "three steps forward and two backwards" time and time again during the journey through the tube. Fig. 4 shows inclined nozzles for the blowing.

The composting machine 1 has a hopper 2 with it lid, via which compostable cold-sorted household rubbish and garden waste is added to the machine. Tube 3 protrudes forward from the machine. In the tube is the screw 8. Screw drive The connection 5 has connections 6 and 7 via which oxygenation and liquid can be supplied to the tubular shaft 4, on which one number of screw sections 9 are located to knead and move the composting material._The screw sections are separated by sections 10, where the composting material lies relatively quiet for a short time.

The mouth 11 of the tube is a short distance into the post-composting material, which forms the stack or ace 13, which grows as the material enters from below.

The composting effect in the inner parts of the stack is stimulated because it lies on the ground while the outer layer is ready-composted and forms an insulating layer 12 around composting processesf4 "'I * Z The composting machine can stand on wheels 14. Its movement backwards due to reaction forces from the output from the tube can be limited by a šstopper ”15, which can be moved manually or automatically on a guide rail 16. To obtain one good supply of oxygen and moisture can the nozzles 17 be directed obliquely.

Claims (4)

515358 PATENT REQUIREMENTS Machine (1) for relatively large-scale composting of household and garden waste as well as waste from restaurant kitchens, etc., consisting of an infeed hopper (2) and a screw conveyor (3) combined with it, characterized in that the oxygenation necessary for a good initial composting phase to the microorganisms acting in the screw conveyor as well as any supply of liquid is provided by introducing air or oxygen and the liquid required under pressure via the tubular shaft (4) on the screw, through the wall of the screw tubular shaft there are through holes (17 ) for oxygenation and the liquid supply, and the screw releases pre-composted material in such a way that a stack or ace (13) is formed, the delivered material being delivered at the bottom near the ground below the stack in this place favorable for post-composting, which is well insulated and protected by ready-composted material (12). Machine according to claim 1, characterized in that the helical part of the screw consists of several sections (9) with varying density between the turns and that these sections are separated from each other by intermediate hatches (10). Machine according to claim 1 or 2, characterized in that the screw can be driven in both directions so that the material kneaded and transported by the screw can be driven, for example, in a repeated process of "three steps forward and two backwards". Machine according to one of Claims 1 to 3, characterized in that the holes or nozzles which pass through the tubular wall of the screw have a direction other than radial and angular relative to the center line of the shaft.