JP2016159295A - Method and apparatus for heating and agitating methane fermentation tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide effective heating and agitation of a methane fermentation tank or a heating and agitation method and a methane fermentation tank using the same.SOLUTION: A method and apparatus for heating and agitating a methane fermentation tank is equipped with a heating replacement component at a center part or a part located left or right from the center of a floor part in the fermentation tank fermenting wet organic waste materials and performs fermentation while heating and agitating by generating a convection flow by a temperature difference between various parts in the fermentation tank.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method and apparatus for fermenting organic waste such as livestock manure and food waste and organic sludge using a heating stirrer (mechanism).

  In the agitation of a fermenter, for example, a methane fermentation tank, mechanical agitation and blower agitation are mainly performed, and a large power is always required.

  In the publicity of Japanese Utility Model Publication No. 59-131296, a pump is installed in the anaerobic digester, a number of outlets are formed in this outlet, and the generated gas is pumped to the connecting pipe by a blower or a compressor. A stirrer for an anaerobic digestion tank connected with a gas pressure feeding tube is described.

  Japanese Utility Model Publication No. 61-7999 discloses that a gas stirring chamber and a fermentation fluid flow chamber are formed in a sealed box-shaped main body, separated by a vertical partition except for the lower and upper portions, and bent into this flow chamber. A partition is provided so as to form a fermentation flow path, and one end of a gas flow pipe is connected to the top of the box-shaped body, and the other end of the gas flow pipe is connected to the bottom of the gas stirring chamber in which the porous body is disposed. A fermenter is described in which a gas circulation pipe is provided with a pump for feeding the generated gas to the gas stirring chamber.

  Japanese Patent Laid-Open No. 2001-276897 discloses a substantially U-shaped cylinder bottom provided in a vertical or substantially vertical direction in a fermenter for fermenting wet organic waste. After collecting the gas chamber with a tube or a substantially V-shaped tube and filling a predetermined amount, the generated gas in the gas chamber is blown out into the cylinder at once to raise the cylinder, and the gas at the bottom of the cylinder The upper end is connected to the upper cylinder of the chamber and the gas chamber, and convection is generated in the fermenter and fermented while stirring.

  Public Utility Sho 59-131296   Public Utility Sho 61-7999   JP 2001-276897 A

  Journal of Waste Science, Analysis of operation data in methane fermentation facilities for manure and food residues Vol, 14.5. pp. 258-267.2003 p. 18

  The stirring mechanism in the methane fermentation tank described in the above public information is based on mechanical stirring or gas stirring, which requires a pump, fan, compressor, etc., and generates utility costs due to power. The fermenter also performs anaerobic fermentation. Therefore, confidentiality must be maintained, and providing a drive unit complicates the fermenter policy and increases costs.

  The present invention has been made in view of the above-mentioned points. The object of the present invention is to provide a large amount of convection in the fermenter by arranging a heat exchange part on the floor part in the fermenter or a part of the low side part. In addition, sufficient agitation can be performed without driving force, and since the agitation motor and fan are not used at all times, the required power can be greatly reduced, and the fermenter equipment is simplified and simplified. An object of the present invention is to provide a fermentation method and apparatus by heating and agitation that can be structured to reduce the size of the apparatus and reduce the production cost.

  In order to achieve the above object, the method for heating and stirring a methane fermenter according to the present invention and the fermentation method using a device maintain a high temperature in order to further increase the activity of microorganisms in a fermenter for fermenting wet organic waste. The heat source is provided with a heat exchange part arranged on the left or right of the center of the floor in the fermentor, or in the center, while generating convection due to temperature differences in each part of the fermenter while heating and stirring It is configured to ferment.

  The center part of the floor part in the fermenter for fermenting the wet organic waste, or the heat exchange part having a shape having a protruding surface finish from the floor part is arranged on either the left or right side of the center, It is configured to generate convection due to temperature difference of each part in the fermenter and to ferment while heating and stirring.

  It is equipped with a heat exchange part arranged on the left or right of the center of the floor in the fermenter for fermenting wet organic waste, or in the center, and ascending convection and descending of the fermentation liquor in the fermenter In the middle of the convection, a barrier wall that opens the upper and lower parts of the wet organic waste is provided, and convection due to temperature difference of each part in the fermenter is generated and fermented while heating and stirring.

  Heating provided in the center of the floor in the fermenter for fermenting wet organic waste, or on the left or right of the center, and provided with an outlet for ejecting hot gas heated from the outside of the fermenter It is provided with a replacement part, and is configured so as to ferment while heating and stirring by generating convection by temperature difference of each part in the fermenter and rising convection of heated gas.

  The method and apparatus for superheated stirring of a methane fermenter according to the present invention is a fermenter for fermenting wet organic waste, having a shape having a protruding surface area from the left or right of the center of the floor or from the center of the floor. A fermentation method by heating and agitation characterized by comprising a heat exchange part that keeps the wet organic waste at an average temperature of 35 degrees or more, and generating a convection due to a temperature difference of each part in the fermenter and performing fermentation while heating and agitation Therefore, the required electric power can be greatly reduced because the agitation motor, fan, and compressor are not used at all times. Furthermore, the fermenter equipment is simplified and the structure is simplified. Reduction can be achieved.

The schematic sectional drawing which arranged the heat exchange part in the fermenter floor central part which shows the embodiment of the present invention. The schematic sectional drawing which arranged the heat exchange part on the left side from the central part of the fermenter floor which shows the embodiment of the present invention. The schematic sectional drawing which arranged the heat exchange part in the shape of a projection in the center part of the fermenter floor which shows the embodiment of the present invention. The schematic sectional drawing which provided the barrier | blocking wall which the upper part and lower part of wet organic waste are open | released in the middle of the ascending convection of the fermented liquid in the fermenter which shows embodiment of this invention, and descending convection The schematic sectional drawing provided with the heat exchange part which provided the outlet which ejects the hot gas heated from the fermenter outside which shows the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In FIG. 1, 3 indicates the outer wall of the fermenter, 4 indicates the fermenter floor, and the inside of the fermenter contains wet organic waste with 6 as the upper surface. The part is provided with a heat exchange part 1 for promoting microbial decomposition, and when the heat exchange part 1 is heated, the temperature of the central portion in the fermenter of the wet organic waste is applied to the upper face part or the outer wall of the fermenter. Ascending convection 7 is generated because it is higher than the near part, and descending convection 8 is generated in the part near the outer wall of the fermenter. It is a mechanism to ferment while doing.

  In FIG. 2, 3 indicates the outer wall of the fermenter, 4 indicates the fermenter floor, and the inside of the fermenter contains wet organic waste having 6 as the upper surface. A heating exchange part 1 for promoting microbial decomposition is provided on the left side of the unit, and the temperature on the left side in the fermenter of the wet organic waste is heated by the heating exchange part 1 so that the upper surface part 6 and the right side of the fermenter are heated. Ascending convection 7 is generated because it is higher than the portion close to the outer wall 3, and descending convection 8 is generated in the portion close to the outer wall 3 on the right side of the fermenter because the temperature is lower than that on the right side. It is a mechanism that ferments while heating and stirring while maintaining the temperature by generating convection.

  In FIG. 3, 3 indicates the outer wall of the fermenter, 4 indicates the fermenter floor, the inside of the fermenter contains wet organic waste with 6 as the upper surface, and the center of the fermenter floor 4 In order to promote microbial degradation in the part, and in order to increase the surface area of the heat exchange part 1, the heat exchange part 1 is provided with the heat exchange part 1 on the substantially triangular pyramidal projection 10, and the heat exchange part 1 is heated. Since the temperature of the central part of the wet organic waste in the fermenter is higher than the part close to the upper surface part 6 and the outer wall 3 of the fermenter, ascending convection 7 is generated, and the temperature near the outer part of the fermenter is higher than the central part. This is a mechanism for generating descending convection 8 because the temperature is low, generating the convection due to the temperature difference of each part in the fermenter, and performing fermentation while heating and stirring while maintaining the temperature. Furthermore, the shape of the protrusion 10 in this case is It is not limited to a roughly triangular pyramid, Such as columnar or spherical. However, further, no exception that hollow.

  In FIG. 4, 3 indicates the outer wall of the fermenter, 4 indicates the fermenter floor, the inside of the fermenter contains wet organic waste having 6 as the upper surface, and the center of the fermenter floor 4 The heat exchange part 1 for promoting microbial decomposition is provided on the left side of the unit, and the upper and lower parts of the wet organic waste are opened and blocked between the rising convection and the falling convection in the fermenter. Since the barrier wall 9 supported by the wall support steel 11 is provided and the heat exchange component 1 is heated, the temperature on the left side of the central barrier wall in the fermenter of the wet organic waste is higher than the right side, so that the rising convection 7 In the opposite right side, the temperature on the opposite right side is lower than that on the left side, so that descending convection 8 is generated. The temperature difference between each part in the fermenter generates convection, and the fermentation is performed while heating and stirring while maintaining the temperature. The barrier wall 9 should have a heat insulating structure. Arbitrariness. Furthermore, when the heat exchange component 1 is arranged at the center of the floor surface 4, the cylindrical barrier wall 9 in which the upper and lower portions of the wet organic waste are opened perpendicular to the floor surface 4 is no exception.

  In FIG. 5, 3 indicates the outer wall of the fermenter, 4 indicates the fermenter floor, the inside of the fermenter contains wet organic waste with 6 as the upper surface, and the center of the fermenter floor 4 The heat exchange part 1 is provided with a heat exchange part 1 provided with a discharge port 12 for injecting a high-temperature gas heated from the outside of the fermenter, provided with a heat exchange part 1 for promoting microbial decomposition on the left side of the unit. As the temperature of the left side of the central portion of the wet organic waste in the fermenter is higher than that of the right side due to the high-temperature gas erupting from 1, the rising convection 7 is generated, and on the opposite right side, the temperature is lower than that of the left side. This is a mechanism for generating descending convection 8 and fermenting while stirring and heating while maintaining the temperature by generating a convection due to the temperature difference of each part in the fermenter.

DESCRIPTION OF SYMBOLS 1 Heat exchange part 2 Raw material inlet 3 Fermenter outer wall 4 Fermenter floor 5 Fermentation gas outlet 6 Wet organic waste upper surface 7 Ascending convection symbol 8 Descending convection symbol 9 Shielding wall 10 Projection 11 Shielding wall supporting steel frame 12 mouth

Claims (4)

  It is equipped with a heat exchange part provided at either the center of the floor in the fermenter that ferments wet organic waste or on the left or right of the center, and generates convection due to the temperature difference of each part in the fermenter. A fermentation method by heating and stirring, wherein fermentation is performed while heating and stirring.   Provided with a heat exchange part in the center of the fermenter for fermenting wet organic waste, or on the left or right of the center and having a shape with a protruding surface area from the floor. A fermentation method by heating and stirring, wherein convection is generated by temperature difference of each part in the tank and fermentation is performed while heating and stirring.   It has heating exchange parts provided at the center of the floor in the fermenter for fermenting wet organic waste or on the left or right of the center, and the convection and descent of the fermentation liquid in the fermenter Heating and stirring, characterized in that a barrier wall is provided in the middle of the convection to open the upper and lower parts of the wet organic waste, and fermentation is performed while heating and stirring by generating convection due to the temperature difference of each part in the fermenter Fermentation method by.   Heat exchange that is provided at the center of the floor in the fermenter for fermenting wet organic waste, or at the left or right of the center, and provided with an outlet that ejects high-temperature gas heated by a superheater A fermentation method by heating and agitation characterized by comprising parts and fermenting while generating heat and stirring by generating convection by temperature difference of each part in the fermenter and rising convection of heated gas.

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