Method and device for emptying the floor of a soda recovery boiler
AssigneeBoildec Oy
InventorTimo Karjunen
Life of this patent
Estimating the term…
Abstract
The invention is related to a method for emptying a furnace floor in a soda recovery boiler when the soda recovery boiler is being shut down. The emptying may be started while smelt is still flowing in smelt spouts. The floor is emptied by sucking smelt from the furnace with a smelt eductor. The invention is also related to a device for removing smelt and wash water from a furnace of a soda recovery boiler by means of suction. Negative pressure is generated in the device by conducting pressurized gas into a suction pipe of the eductor so that the pressurized gas is discharged in the discharge direction of smelt and wash water.
Claims20
A method for emptying the floor of a soda recovery boiler when the boiler is being shut down, characterized by the method comprising:
- sucking smelt from the soda recovery boiler with a suction device through an opening arranged in a wall of the soda recovery boiler.
A method as claimed in any one of the preceding claims, wherein the method comprises sucking smelt with a smelt eductor from a furnace of the soda recovery boiler into
- a smelt spout;
- directly or through the smelt spout to a smelt tank or a dissolving tank;
- or
- another collection system.
A method as claimed in any one of the preceding claims, wherein the smelt to be sucked is salty smelt or wash water.
A method as claimed in any on of the preceding claims, which method comprises:
- starting the emptying of the soda recovery boiler at a point of time when the smelt surface level in the boiler is such that smelt still flows in a smelt spout.
A method as claimed in any one of the preceding claims, wherein the method comprises installing a smelt eductor in an opening in a boiler wall so that a suction pipe comprised by the smelt eductor extends below the level of the opening into a smelt pool on the floor of a furnace in the boiler.
A method as claimed in any one of the preceding claims, wherein the method comprises using a smelt eductor that conforms to a smelt spout of the soda recovery boiler.
A method as claimed in any one of the preceding claims, wherein the method comprises sucking smelt with a smelt eductor whose suction pipe is throughout substantially hollow and free from obstacles.
A suction device for emptying a floor of a soda recovery boiler when the boiler is being shut down, characterized in that
- the suction device is adapted to be installed in an opening arranged in a wall of the boiler and in that the suction device comprises:
- a mechanism for generating suction with which smelt is sucked from the soda recovery boiler.
Dependencies are inferred from the claim text.