DE19648731A1 - Method for treatment of residual waste - Google Patents

Abstract

The waste (1) is mixed with water, and preferably sprayed (8) with water. The organically laden water (9) is separated and the sediment (18) dried. The drying of the waste takes place in a closed container (22) under forced aeration, and/or in a drying chamber (23). Before mixing or spraying with water the waste is reduced in size and/or sieved, and afterwards is compressed (19).

Description

The invention relates to a method for treating residual waste and a Vorrich device for performing such a method.

Methods for treating residual waste are already known. With some of these previously known processes are intended to be combustible and non-combustible waste components be separated from each other. So far, this has mainly been dry class process used. Here, however, there may be advantages if the the correct places in the separation process are wet classified.

The object of the invention is to provide an improved method for the treatment of Re stabfall and a device for performing such a method vorzu beat.

According to the invention, this object is achieved in a method for treating residual Waste solved in that the residual waste mixed with water, preferably with Water is sprayed, that the organically loaded water is separated and that the residue is dried. So it becomes a so-called percolation ver driving done. The water seeps through the garbage and picks up organic matter. The water so organically loaded is then  severed. To support the percolation process can be in the container Mixing tools are available.

Advantageous further developments are described in the subclaims.

It is advantageous if the drying of the residue in a closed Container is under forced ventilation. Instead of or in addition, the Drying the residue preferably in a drying chamber. Through the Drying of the firing fraction achieves the highest possible heating value.

According to a further advantageous development, the residual waste in front of the Vermi crushed or sprayed with water and / or sieved. The sieve passage is then fed to the percolator.

The residual waste can be pressed after mixing or spraying with water will. This can be done, for example, using a classifying press (Nozzle, sieve and screw classifying press).

A device for treating residual waste is characterized according to the invention net through a percolator to mix or spray residual waste with Water and a drying device to dry the residue from the Percolator.

The drying device preferably consists of a closed container ter in which the residue is dried with forced ventilation, and / or one Drying chamber.

Another advantageous development is characterized by a shredder tion device for crushing the residual waste and / or a sieve for sieving of the optionally crushed residual waste.  

Another advantageous further development is characterized by a press device device, preferably a classifying press (nozzle-screen-screw-classifying press).

An embodiment of the invention is explained below with reference to the accompanying drawings. In the drawing, the
only figure is a diagram of a plant for performing the method.

The remaining waste 1 is fed in the raw state to a comminution device 2 and comminuted there to a grain size of less than 150 mm. The residual waste 3 thus reduced is fed to a screening plant. The screen overflow 5 with a grain size of more than 80 mm is passed over a bias tape separator 6 , after passing through which it forms the high-calorie fraction 14 . The inclined belt separator 6 leaving the, contaminated heavy 7 is fed to the scrubber 31st

The passage of the sieve 4 , the grain size of which is up to 80 mm, is fed to the percolator 8 . This percolator 8 is a container in which the material is sprayed with water. In addition, stirring devices can be provided. The water seeps through the material. The organically laden water 9 is fed to a fermentation device 10 . The solid / liquid residue 18 from the percolator 8 is fed to a nozzle-sieve-screw-classifying press. There organic water 20 is pressed again and fed to the fermentation device 10 . The solid residue 21 from the classifying press 19 is then dried.

This is done on the one hand by mechanical-biological stabilization in a closed container 22 , where the residue is processed under forced ventilation. On the other hand, the solid residue 21 is mechanically-thermally stabilized in the drying chamber 23 . Heat 25 can be supplied. Both processes result in dry stabilizer 24 . Only solid residue 21 can be used in the mechanical-biological stabilization in the rotting box 22 . However, it is also possible to treat additional material in the closed container 22 . Furthermore, it is possible to carry out only one of the two drying methods (mechanical-biological stabilization in the container 22 or mechanical-thermal stabilization in the drying chamber 23 ).

The dry stabilizer 24 is fed to a screening plant 26 . The screen overflow with a grain size of more than 20 mm is fed to the bias belt separator 27 and from there to the combustion device 15 . The heavy goods from the bias binding device 27 are - like the heavy goods 7 from the bias binding devices 6 - fed to the washer 31 .

The passage of the sieve 26 , which has a grain size of up to 20 mm, is fed to the hard material separator 28 . The light material 29 leaving the hard material separator 28 is fed to the combustion device 15 . The contaminated heavy material 30 from the hard material separator 28 is fed to the washer 31 . It leaves the scrubber as a clean heavy load 32 .

The high-calorific fraction 14 from the bias binding device 6 is also fed to the combustion device 15 . The resulting heat during combustion 15 me 25 can be used for the thermal drying 23 .

The methane-containing gas 11 from the fermentation device 10 is supplied to a gas purification device 12 which generates clean methane-containing gas 13 which is burned in a further combustion device (auxiliary firing) 16 . Here, further heat 25 is generated.

The invention provides a method for percolation cleaning of residual waste mechanical-biological and / or mechanical-thermal dry stabilization created. The reason for this is the process scheme shown in the figure  additional arrangement of the aggregates required for optimal separation and Attachments can be seen. The stabilization of those moistened with a wet classification flammable substances take place in a closed container (rotting box) and / or in a drying chamber. The closed container can with fresh air and / or with Recirculated air can be operated.

Claims (8)

1. A method for treating residual waste, characterized in that the residual waste ( 1 ) is mixed with water, preferably sprayed with water ( 8 ), that the organically laden water ( 9 ) is separated and that the residue ( 18 ) is dried ( 22 , 23 ). 2. The method according to claim 1, characterized in that the drying of the residual waste ( 1 ) in a closed container ( 22 ) with forced ventilation and / or in a drying chamber ( 23 ). 3. The method according to claim 1 or 2, characterized in that the Restab case ( 1 ) is crushed before mixing or spraying with water ( 2 ) and / or sieved ( 4 ). 4. The method according to any one of the preceding claims, characterized in that the residual waste is pressed after mixing or spraying with water ( 19 ). 5. Device for treating residual waste, characterized by a percolator ( 8 ) for mixing, preferably spraying residual waste with water and a drying device ( 22 , 23 ) for drying the residue from the percolator. 6. The device according to claim 5, characterized by a closed loading container ( 22 ) for treating the residual waste under forced ventilation and / or ei ne drying chamber ( 23 ). 7. The device according to claim 5 or 6, characterized by a shredding device ( 2 ) and / or sieving device ( 4 ) for shredding or sieving the residual waste ( 1 ). 8. Device according to one of claims 5 to 7, characterized by a Press device, preferably a classifying press.