Device for processing substances, in particular digestate and digestate mixtures

Abstract

A device for processing digestate or digestate mixtures (2) includes a floor (3) on which is to be places the digestate (2). The floor (3) is designed gas-permeable. The device includes an inlet device (4) that can be connected to a line (6) for introducing a gaseous medium into the floor (3). The inlet device (4) is designed such that a gaseous medium can flow through at least part of the area of the floor (3) for purposes of aerating the digestate (2) and heating the digestate (2) if the gaseous medium is heated. At least one heating element (5) is provided in the area of the floor (3) to provide heat to the digestate.

Description

TECHNICAL FIELD[0001]The invention relates to a device for processing substances, in particular digestate or digestate mixtures and more generally to the processing of substances that are to be processed for treatment by application of heat.BACKGROUND INFORMATION[0002]Various devices are used, for example, for post-processing of digestate or a mixture of digestate and other substances from a process, e.g., a fermentation process. In the post-processing, the digestate, which arrives with a temperature of about 35° C. from the process, is post-processed for a certain amount of time at a higher temperature level. As a rule the digestate includes a large amount of liquid, in particular water, often at a level greater than 50%, requiring additional processing of the digestate in order to significantly lower the water content, so that composting, in particular, becomes possible.[0003]To accomplish the required heating, an airflow that has been heated up in a tube is often blown through a ...

AI Technical Summary

Benefits of technology

[0004]It is therefore the objective of the invention to provide a device of the aforementioned kind that works significantly more effectively with regard to the required processing period and associated energy requirements.

[0009]According to the invention, a heating device is provided in the bottom of the device which can be a part of the processing container. In this manner, a heated area is available through the bottom for the substances to be processed, in particular digestate, this area heating the substances “from the bottom” with a significantly reduced energy consumption. Thus, heating the substances becomes significantly more effective. In addition, with closed containers significantly fewer cycles are required for reheating the exhaust coming out of the container than with the conventional method.

Problems solved by technology

This process is very drawn out due to the low specific thermal capacity of air, because air that cools down when passing through the digestate must be collected as exhaust air and reheated before it can be blown into the inlet of the processing container.

Using this procedure, heating up the digestate requires a large number of cycles.

It also means that a great amount of energy is required to heat up the air, with this energy requirement increasing with the number of required cycles.

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