Method for production of carbonized solids and soluble liquid from food waste and device for production of same

Abstract

The invention provides a method for production of carbonized solids and soluble liquid from food waste and a device for production of the same. The method includes the steps that food waste is thrown into a heating pressure reactor with a steam generation device, and saturated steam is thrown into the heating pressure reactor from the steam generation device to enable the food waste to be separated into soluble liquid and carbonized solids. According to the method for production of carbonized solids and soluble liquid from food waste, the saturated steam supplied by the steam generation device is supplied into the reactor through a primary steam supply pipe and a secondary steam supply pipe respectively, the primary steam supply pipe and the secondary steam supply pipe can be opened and quickly meet the required thermodynamic conditions while the heating pressure reactor starts operating, in the operating process of the heating pressure reactor, the secondary steam supply pipe supplies steam into the heating pressure reactor intermittently in order to supplement heat energy in short supply and increase the saturated steam needed by internal heat transfer.

Description

technical field [0001] The present invention relates to a method for production of carbonized solid and soluble liquid from food waste and a device for production of the same, and a method for producing carbonized solid and soluble liquid from food waste and a device for production of the same. Background technique [0002] Normally, the food waste generated in Korea reaches 14,452 tons / day according to the 2008 Ministry of Environment statistics, of which 13,326 tons / day, which accounts for about 92.2%, is recycled. However, the current situation is that 80.8% of these food waste recycling facilities (206 processing facilities) are recycled as simple low-value-added products such as compost or feed. [0003] Food waste has the following problems: Food waste is an organic waste with a high water content, and there is a large amount of water in the form of bound water inside the cell wall of the organic matter. Therefore, it is difficult to maintain a water content below 70% ...

AI Technical Summary

Problems solved by technology

[0003] Food waste has the following problems: Food waste is an organic waste with a high water content, and there is a large amount of water in the form of bound water inside the cell wall of the organic matter. Therefore, it is difficult to maintain a water content below 70% by mechanical dehydration, and it is easy to rot. , due to this characteristic, it will cause secondary environmental pollution such as leaching water, odor and pest production

In addition, there are the following disadvantages: due to the need for the vaporization energy of water (539cal / g at 1 standard atmospheric pressure), thermal decomposition itself requires more energy, and after thermal decomposition, a large amount of condensed water is generated, resulting in condensed water Separators grow larger than needed and become difficult to operate (Metcalf & Eddy, 1978)

The method described here is limited to the method of using sewage sludge as a raw material to generate solid carbides. In order to heat the reactor, the heating of the heated pressure horizontal reactor is carried out by heating the pressure horizontal reactor. The indirect heating method by an external electric heater has the following problems: the heat transfer rate is reduced, and because only the moisture in the sludge is used to maintain the thermodynamic temperature and pressure conditions, the time required for temperature rise / pressure rise is eventually reduced Longer, lower carbonization rate

Moreover, the high-temperature and high-pressure wet thermal decomposition reactor of the above-mentioned patent is used as a vertical reactor. If sludge is to be input and discharged, it is necessary to completely separate the upper part and the lower part of the reactor.

Furthermore, since only the drive shaft of the stirrer exists on the upper part, when the equipment is increased in capacity, mechanical failures due to the load on the stirrer will often occur, which is very inconvenient.

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