摘要:
PROBLEM TO BE SOLVED: To provide an apparatus for heat-cracking and steam-gas-reforming of organic waste, by which a clean useful gas free from a harmful gas can be obtained, which has large energy efficiency and good operability, and which is safe and highly economical.SOLUTION: An apparatus for gasifying an organic waste is constituted as follows. A plurality of small cylinders for partitioning a horizontal rotary cylinder 2 into a space (thermally cracking space 5) at the insertion side of a raw material and a space (a discharging side space 6) at the discharge side of a product in gas- and solid-shapes is installed in the rotary cylinder 2. The small cylinders are helical cylinders 4 having the interiors formed out of helical plates, and the helical cylinders 4 are regulated so that the advancing directions of solids in the helical cylinders according to the rotation of the horizontal rotary cylinder 2 may be the same or mutually inverse. The apparatus has a steam-sending pipe 9 passed from the outside through one of the insertion side terminal of the raw material and the other side terminal to the thermally cracking space 5 by allowing the steam to be indirectly heated in the interior of the horizontally rotary cylinder, and heating means for supplying heat from the outside of the horizontal rotary cylinder 2 through the side wall of the cylinder to the inside of the cylinder.
摘要:
PROBLEM TO BE SOLVED: To provide a gasifying method and a gasifying apparatus of organic wastes, with which a volume of radioactive organic wastes is significantly reduced by pyrolyzing the organic wastes and a fuel gas of high calorie can be extracted therefrom.SOLUTION: This pyrolytic gasifying method of organic wastes has: a pyrolytic gasifying process of decomposing the organic wastes into a pyrolysis gas and char in an internal circulation kiln; a tar separation process of separating the pyrolysis gas into a tar liquid and a dry gas; a tar liquid cooling process of cooling the tar liquid separated in the tar separation process to 100°C or lower; a tar liquid supply process of feeding all or a part of the tar liquid into the internal circulation kiln; a gas flow rate control process of controlling the gas flow rate in such a way that pressure inside the internal circulation kiln is always equal to atmospheric pressure; and a char extracting process of applying a current to a plurality of electrode pairs which are set at respectively different heights across a char discharge pipe directly connected to the internal circulation kiln, to measure a level of the char based on presence or absence of passage of current, and to continuously extract the char outside the system while keeping the level of the char in a predetermined range.
摘要:
PROBLEM TO BE SOLVED: To provide an easy-to-oprate dryer that conveys a raw material by a screw conveyer for taking the raw material out of a raw material hopper, and uniformly circulates a high-temperature gas flow from the bottom, thereby reducing construction cost.SOLUTION: The through-air dryer includes a casing having a raw material inlet formed at one end for supplying the raw material to be dried and a dried material outlet formed at the other end for taking out the dried material; a screw that includes helically curved plate-like blades, and extended, from one end toward the other end of the casing, to an intermediate position between the one end and the other end of the casing; a screw rotating means for rotating the screw around its axis in the casing; and a drying gas uniformly-dispersing and discharging means which brings the drying gas into contact with the raw material at the bottom of the casing.
摘要:
PROBLEM TO BE SOLVED: To reduce the cost of a metal recovering technique with which a metal is recovered from a circuit board by using the external heat-type rotary-kiln while preventing a generation of hydrogen promide and tar.SOLUTION: A metal recovering apparatus is provided with an external heat-type rotary kiln body 10. The rotary kiln body 10 is provided with a body part 11 and a cylindrical supplying pipe 13 and an exhausting pipe 14. A crushed circuit board from the supplying pipe 13 and a trial agent for neutralizing the hydrogen promide from a trial agent pipe 61, are supplied to the body part 11. Furthermore, a plurality of conventional cylinders 15, in which screws 15C having reversly faced spiral surfaces, are provided and the conventional force is provided with the rotation of the rotary-kiln body 10, are provided, and thus, the raw material is circulated for sufficient time among a first space X and a second space Y, and disolved into hydrocarbon having a lower weight than the tar.