NOVELTY - Semi-continuous heating-type biogas generation kettle comprises a sealed tank body, and a fermentation tank located at the lower part of the tank body. The upper part of the tank body is provided with a feeding port and an air outlet, and its top end is provided with a pressure meter, an alarm and an anti-explosion valve. The fermentation tank comprises an inner cylinder wall and a partition wall, which is coaxially arranged and is divided into approximately equal volume of center area, a middle area and edge area. The partition wall is divided into a straight section and a top plate section.    USE - Used as a semi-continuous heating-type biogas generation kettle.    ADVANTAGE - The biogas generation kettle: adopts a batch semi-continuous feeding technology, controls feeding amount and temperature thus balancing a gas yield; is free of production stopping and tank cleaning; achieves material acidification and fermentation in different sections, i.e., acidification in different tanks and fermentation in different zones; has short gas production time and high gas yield; is not influenced by climate and can be used for room heating in regions having cold winter.    DETAILED DESCRIPTION - Semi-continuous heating-type biogas generation kettle comprises a sealed tank body, and a fermentation tank located at the lower part of the tank body. The upper part of the tank body is provided with a feeding port and an air outlet, and its top end is provided with a pressure meter, an alarm and an anti-explosion valve. The fermentation tank comprises an inner cylinder wall and a partition wall, which are coaxially arranged, and is divided into approximately equal volume of center area, a middle area and edge area. The partition wall is divided into a straight section, and a top plate section, which are having equal height. A convex edge of the upper top plate is provided with a smooth transition section. An upper flat edge is located between the inner wall and the partition wall, which is slightly higher than the straight section. The lower part of the partition wall is provided with a center area and a lower opening (110) of middle area. An edge area is close to the outer partition wall of the tank body bottom. The upper wall is provided with a discharging port (112), and a heating pipeline (113) is paved on the lowermost heat preservation heating pipeline of the biogas fermenting tank. The heating pipeline passes through the bottom of the sealed tank body. The tank body is provided with a horizontal platform (114) which is inwardly projected on the upper tank body and the inner wall of middle part. The upper platform is paved with a groove type annular track (115). The platform is equipped with a circular track corresponding to an acidification device of fermentation tank. The device comprises multiple same acidification tanks, where each of the acidification tank is provided with an upper end open slot type container, where the lower bottom is sealed, and a center area horizontal section having fan-ring shape. The volume of the central region of the fermenting tank is equal to the volume. The two side wall surfaces of each acidification tank along the straight line direction of the center are provided with a supporting rotating shaft. The supporting rotary shaft is set between two adjacent acidification tanks by a bearing and a sleeve. The two sides of the acidification tank are provided with a support rod on the inner groove. The inner end of the support rod is fixed to a center fixing ring and the outer end is fixed on an outer fixing ring and connected as a whole acidification supporting frame. The outer fixing ring is equipped with one group of caster wheel, which is set in the annular track of the groove. The outer upper surface of fixing ring is fixed with a big gear ring. An acidification tank is driven by an acidification driving device. The outer wall of the fermenting tank is set with a top plate section, and the top plate section is connected to the bottom edge. The turning of the two side support on the rotating shaft is 90 degrees . The acidification tank driving device comprises an outside tank body motor, a speed reducer, a first shaft joint, a driving magnetic rotor and a driven magnetic rotor located inside the tank body. A driving gear is sealed by the two parts of the first shaft joint. The motor is mounted on the outside of the tank body through the speed reducer and the first shaft joint is located in a first shielding cover of the driving magnetic rotor to rotate. A driven magnetic rotor is located within the side inner wall of a magnetic coupling shield to rotate synchronously, and the upper drive gear is fixed to the driven magnetic rotor fixing rotating shaft to rotate. The big gear ring of the driving gear is connected to the acidification device for driving the integrated acidification device. A stirring device is located along the axial center of the tank. The stirring device is located on upper part of permanent magnet driver. The middle part of the stirring device is set with a stirrer shaft rod and is located at the lower part of the stirrer. The permanent magnet is located in the tank body. The outside driver comprises a driving motor, a second shaft joint, an outer magnetic rotor and an inner magnetic rotor of the tank body. The inner magnetic rotor is integrally connected to a stirring shaft section by a second shielding cover sealed with two parts. The upper section stirring shaft is connected with the stirrer shaft rod through a cross sliding block coupling. The middle part of the stirrer shaft rod is provided with the fixing ring. The lower fixing ring is equipped with a thrust bearing. The thrust bearing is located on the center fixing ring of the acidification tank. The stirrer shaft rod passes through the center fixing ring of the acidification tank, and its center hole extends into the tank body, and connected to the lower part of the stirrer. A feeding device is located on the outer wall of the tank body. The feeding device comprises a material pumping pump. The inlet of the pump is connected to a discharging pipe and a feeding pipeline. The pumping pump is connected with the outlet of the feeding pipeline and the discharging pipe. The discharging pipe and feeding pipe are provided with valves. The feeding pipeline and discharging pipeline are connected to the upper discharging pipeline and the discharging port. The feeding pipeline is connected to a raw material hydrolyzing tank. The feeding pipe is connected with a feeding port. A slag discharging pipeline is used for collecting the biogas residue.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the semi-continuous heating-type biogas generation kettle.    Lower opening (110)    Discharging port (112)    Heating pipeline (113)    Horizontal platform (114)    Groove type annular track (115)