FURNACE FOR RADIOACTIVE WASTE BURNING Russian patent published in 2005 - IPC

FIELD: radioactive waste processing by the burning method.

SUBSTANCE: the proposed furnace for radioactive waste burning has a case, within of which non less three burning chambers are coaxially located. The chambers have a general chamber for ash reburning. The general chamber is equipped with a fire grate. Each of burning chambers is autonomous, has the device for supply of fuel and oxidizer and is equipped with a fire grate and gate. The chamber for reburning the waste gases is coaxially located in the central part of the furnace. This chamber consists of external and internal cases, forming a labyrinth gas duct. The burning chambers are connected with the chamber for reburning the waste gases by means of gas-escape channels, having unequally-height and unequally-directional levels of location in each two neighboring burning chambers. A pressure-tight lock chamber of cylindrical shape is located over the burning chambers and chamber for waste gas reburning. The lock chamber is general for all burning chambers and is equipped with a cover, charging branch, pipe of exhaust ventilation, heat exchanger, transport system and control unit. The unit for control of the drives of transport system, fire grates, gates and strips is located on the lock chamber cover. The transport system consists of drive and container with a tray and limit switch. The container is fulfilled in the form of horizontally located cylinder. It is foreseen the circular motion of the cylinder. The drive of the transport system is connected with the container by means of an open gearing and is equipped with a gear, located on the output shaft. The output and input pipes for acceptance and unloading of wastes are located with good alignment one under other on the cylindrical surface of the container. The bushings are located on the side end surfaces of the container. The tray has possibility of rotation and has the shape of a bed, repeating the curvature of the internal surface of container case. Besides, the semi-axes are located on the semicircular side end surfaces of the container. These semi-axes together with the container bushings form a movable joint of the type of axis-bushing.

EFFECT: increased economical efficiency, processing efficiency, operation reliability and environment safety.

1 cl, 7 dwg