RU99110634A - MULTI-CHAMBER BOILER FURNACE FOR CARNALLITE DEHYDRATION - Google Patents

Claims (7)

1. A multi-chamber fluidized bed furnace for dehydration of carnallite, comprising a housing with a cap gas distribution hearth dividing it into a thermally insulated superlattice and lined sublattice parts, partitions between chambers with drain holes in the superlattice, and also partitions in the superlattice space of each chamber, dividing it into sections and having adjustable overflow area holes located at the bottom so as to ensure a zigzag course of the material, dust catching cyclones connected by gas ducts to chambers, external fire chambers connected by lined gas ducts with a sublattice chamber space and having a lined combustion chamber and a mixing chamber, a burner device and nozzles for supplying fuel, combustion air and air to cool the flue gases, the last nozzles being first brought in to the cavities of the double side casings of the furnace and the connecting gas duct, connected to the combustion chamber and / or the mixing chamber, as well as the nozzles for supplying chlorine and steam, characterized the fact that the last chamber of the furnace has an autonomous dust collection system and is separated from the previous chambers by a wall having only a drain hole for the overflow of dehydrated material, and pipelines with chlorine and steam are connected to each furnace.  2. The multi-chamber fluidized-bed furnace according to claim 1, characterized in that the pipelines with steam are connected to each gas duct composing the furnace with the gas distribution chamber of the furnace through a metering device.  3. The multi-chamber fluidized bed furnace according to claim 1, characterized in that the chlorine pipelines are connected to the furnaces through a distributor. 4. Multi-chamber fluidized bed furnace according to claim 1, characterized in that the total cross-sectional area of the outlet openings of the caps of the gas distribution hearth of each chamber is determined by the formula

where S ₁ - the total cross-sectional area of the outlet openings of the caps in the 1st chamber;
S _{1 + n} is the total cross-sectional area of the caps in the (n + 1) chamber;
W ₁ - the velocity of the coolant in the layer of the 1st chamber;
W _{1 + n} is the velocity of the coolant in the layer (n + 1) of the chamber; n = 1, 2, 3, etc.  the total cross-sectional area of the caps in the 1st chamber is within 2-5% of the gas distribution hearth of this chamber.  5. The multi-chamber fluidized bed furnace according to claim 1, characterized in that one or more furnaces can be connected to the gas distribution chambers of the furnace.  6. The multi-chamber fluidized bed furnace according to claim 1, characterized in that the last chamber of the furnace has a gas distribution hearth area of not more than 15% of the total gas distribution hearth area of the furnace.  7. Multi-chamber fluidized bed furnace according to claim 1. characterized in that the total area of the gas distribution hearth of the last two chambers of the furnace does not exceed 50%.