DE278398C - - Google Patents

Description

IMPERIAL A

PATENT OFFICE.

PATENT LETTERING

Vr 278398 - CLASS 16TH GROUP

. ALEX from KROTTNAURER in DRESDEN.

under heating.

Patented in the German Empire on April 20, 1913.

The transfer of waste materials such as felt, leather, bones, etc. into artificial fertilizers is done according to the known method in such a way that these substances are first dissolved in dilute sulfuric acid are soaked until they are completely soaked with the same, which after about 48 hours is done. This mass then becomes the action of specially produced exposed to hot, strained steam for so long

ίο until it has come off. The one made in this way Artificial fertilizer, however, in no way meets the requirements that are made of such must be asked. The dilute sulfuric acid, which is used to break down the Waste material is used, cannot be expelled sufficiently, much remains even more still a considerable residue, which even after the artificial drying the mass is hygroscopic and therefore its storability is completely impossible power.

The method of the present invention now takes a different approach, in that at Place of hot steam hot air enters through which the unlocking of the in dilute Sulfuric acid soaked waste material takes place and then the hot air also takes place at the same time the drying of the digested artificial fertilizer causes.

The amount of acid required to digest the manure can now only be added to the soft water in the amount necessary for digestion, so it does not need to be added in excess, 35

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as was previously necessary when superheated steam was used for digestion became. In addition, the acidic water, which was used to treat a lot of manure materials, can be renewed to be used for soaking and souring the next amount of material as it is soaked from Materials can be drained and not completely evaporated as before.

The accompanying drawing shows, for example, how to carry out the new exploration process Serving apparatus shown in section through the longitudinal axis.

According to the new process, the raw materials, felt, leather, etc., are first in soaked in dilute sulfuric acid for about 48 hours until they are completely soaked. Then the liquid is drained in order to replace the used part Preparing a new batch to be used again. This preparation the waste before the unlocking not only makes it possible, as already mentioned in the introduction the amount of water to be evaporated later by the dry hot air is reduced to a minimum to limit, but also to add just as much acid to the waste as for digestion is necessary, as one has the dissolving liquid before contact with the By adding the amount of acid determined by experience can bring the degree of acidity required for the waste to be processed later unlocking is necessary, so that after

Claims (1)

all of the acid absorbed by the waste materials is bound and thus there is no free acid present, which would add to the dried and later ground artificial fertilizer hygroscopic and therefore incapable of storage. The raw material is in a container a, in which it is sprinkled with the water and acid mixture coming from the boiler b ίο will. The acid mixture passes through the pipe c to the shower heads d located at the top of the container α and moistened the material to be digested in good distribution. The acid that is not absorbed and dripping down by the material reaches a collecting container e, from which it is conveyed back into container b. The raw material, saturated with the acid mixture, is transferred from the boiler α through a conveyor belt / into the actual digestion boiler. done where it falls onto a second conveyor belt h supported by rollers or rollers g. The conveyor belt h takes up the entire length of the boiler and guides the material through _: through it. It lies in a thin layer on the conveyor belt h and hot air flows through it on the way through the digestion vessel 5 in order to evaporate the acid mixture contained in the raw material, so that the former emerges completely dry. The digestion vessel is heated with dry hot air by means of a coke oven i, from which the hot air is pressed into the channels / by means of a fan k. From there the hot air arrives in a tube m provided with nozzles η , which takes up the entire length of the digestion vessel j. The material lying on the conveyor belt h is therefore exposed to the flow of hot air from each individual nozzle on its way from one end of the digestion vessel to the other; from this it follows that the material completely saturated with the acid on entry leaves the boiler dry. The artificial fertilizer obtained in this way remains dry indefinitely. The vapors that develop in the digestion vessel s when the waste materials are dried can escape from the pipe r , the slide of which is opened as required. . The artificial fertilizer dried in the digestion vessel on the conveyor belt h , after leaving the former, falls onto a conveyor belt 0, which takes it to a mill p , and after being ground it arrives in the sack q. Godfather ν τ-An saying: Process for converting waste materials into artificial fertilizers using sulfuric acid under heating, characterized in that the waste materials in the uninterrupted Operation soaked completely with dilute acid, then with hot air until it becomes liquid heated and finally dried. 1 sheet of drawings.