Patent DE-102008038065-A1 (DE)
Title: Biogas plant-fermenter comprises fermenter container, which is formed from two container elements, feeding device for biomass to be fermented, rolling device for substrate in the fermenter container, heating device, and gas removal device
Inventor: CHOWDHURY RAJIB PAL
IPC: C12M1/107
Filed: 2008-08-16
Abstract: The biogas plant-fermenter (1) comprises a fermenter container, which is formed from two container elements (2, 3), a feeding device for the biomass to be fermented, a rolling device (13, 14) for a substrate in the fermenter container, a heating device, and a gas removal device. The container elements have a cylindrical or prismatic form, are horizontally arranged next to each other and aligned parallel in longitudinal direction, and are respectively connected to the opposing front sides with flow pipes (6, 7) for substrate flow. The rolling device is circularly rollable with the substrate. The biogas plant-fermenter (1) comprises a fermenter container, which is formed from two container elements (2, 3), a feeding device for the biomass to be fermented, a rolling device (13, 14) for a substrate in the fermenter container, a heating device, and a gas removal device. The container elements have a cylindrical or prismatic form, are horizontally arranged next to each other and aligned parallel in longitudinal direction, and are respectively connected to the opposing front sides with flow pipes (6, 7) for a substrate flow. The rolling device is circularly rollable with the substrate in the container elements and the flow pipes. The substrate flows into the container elements in a counter flow direction. The container elements are common parts and the flow pipes are assembly module of a fermenter kit. The assembly module has a maximum transverse extension and maximum longitudinal extension, which are allowed for a road transport, so that a complete fermenter kit is transportable from a production work to an installation location with a heavy goods vehicle such as low-bed trailer and is mountable on the location. A transportable container is provided as further kit element additionally for the fermenter kit with a controller and a combined heat and power plant, which are incorporated in the transportable container. The front side openings are eccentrically introduced on the container elements for connecting the flow pipes, so that the opening in the lower area is arranged to the container element in the placed and mounted state of the container element and the opening in the upper area is arranged to the adjacent container element in the front side, so that the corresponding flow pipe obliquely, upwardly runs from one container to other container. During the use of two container elements, the opening of the upper area is arranged in longitudinal direction oppositely with one container element and the opening in the lower area is arranged in the other container element, so that the flow pipe obliquely, downwardly runs from one container to the other container. The flow pipes are formed to the openings of the container elements by a slanted straight tubular piece running in a transverse direction with connecting pieces (38) originating from the tubular piece, where the flow pipe-diameter is 0.2-0.8 of the container element-diameter. A controllable conveyor screw that is controlled in the rotating direction is arranged as rolling device in the tubular piece and/or coaxially in the connecting piece. The upper end of the tubular piece is detachably closed with a bearing lid, through which a screw shaft is rotatably guided and at which the screw-shaft drive is kept. An upper bearing lid is introduced at the lower end of the tubular piece for a second bearing point of the screw shaft. The upper end of the tubular piece and/or an upper bearing lid lies in the height over the normal substrate level in the assigned container element. A paddle-agitator is built as emergency agitator in one of the container elements with vertical drive shaft. Pipelines are connected in the bottom area of the container element and connected with a controllable pump. The container elements are aerially placed on supporting elements with aerially placed pipelines or if necessary partially inserted in the bottom. The container elements have a circular-cylindrical shape with embossed front sides. The container elements, the connecting pieces and/or the flow pipes are produced form glass-fiber reinforced plastic material or similar material or optionally from stainless steel or laminated concrete. A heating process takes place in one of the container elements by a separate heating wall. A heating tube of a heater and a heat insulator are integrated in double-walled container walls with container elements made of glass-fiber reinforced plastic material. The heating tube directly lies at the inner wall. A biomass-solid-supply takes place from top to the container element over a supply shaft by inserting optionally with a feed screw and/or by pressing in the lower area through a supply opening into the container element. The container elements have a gas removal connection and optionally further connecting pieces for sensors of control engineering at the top. An elongated gas sack is introduced and anchored in the longitudinal area between the container elements.