Method of producing aqueous solution of slaked lime and apparatus therefor

An apparatus for producing aqueous slaked lime solution, comprising:

• a dissolving tank;
• water supply piping connected to a lower part of the dissolving tank for introducing water into the dissolving tank;
• effluent piping connected to an upper part of the dissolving tank for discharging aqueous slaked lime solution from the dissolving tank;
• a stirring blade disposed within the dissolving tank in a bottom part thereof;
• a partition plate disposed within the dissolving tank and beside a side wall of the dissolving tank, said partition plate extending from above a surface of water in the dissolving tank to above the stirring blade for providing a slaked lime introducing zone which is surrounded by the partition plate and the side wall of the dissolving tank;
• a hopper disposed above the slaked lime introducing zone for introducing powder of slaked lime into the dissolving tank;
• and
• a fluidized slaked lime layer height-control device disposed within the dissolving tank in an outside part of the slaked lime introducing zone above the stirring blade for preventing slaked lime particles from ascending with ascending aqueous slaked lime solution in the dissolving tank, said fluidized slaked lime layer height-control device having at least two slant plates, wherein an upper end of a lowermost slant plate is disposed in contact with the partition plate and a lower end of an uppermost slant plate is disposed in contact with a side wall of the dissolving tank.

An apparatus for producing aqueous slaked lime solution, comprising:

• a dissolving tank;
• water supply piping connected to a lower part of the dissolving tank for introducing water into the dissolving tank;
• effluent piping connected to an upper part of the dissolving tank for discharging aqueous slaked lime solution from the dissolving tank;
• a stirring blade disposed within the dissolving tank in a bottom part thereof;
• a partition plate disposed within the dissolving tank and beside a side wall of the dissolving tank, said partition plate extending from above a surface of water in the dissolving tank to above the stirring blade for providing a slaked lime introducing zone which is surrounded by the partition plate and the side wall of the dissolving tank;
• a hopper disposed above the slaked lime introducing zone for introducing powder of slaked lime into the dissolving tank;
• and
• a fluidized slaked lime layer height-control device disposed within the dissolving tank in an outside part of the slaked lime introducing zone above the stirring blade for preventing slaked lime particles from ascending with ascending aqueous slaked lime solution in the dissolving tank, the fluidized slaked lime layer height-control device comprising a plurality of interconnected cylindrical members disposed at a predetermined angle with respect to a water surface in the dissolving tank, wherein an upper end of a lowermost member is disposed in contact with he partition plate and a lower end of an uppermost member is disposed in contact with a side wall of the dissolving tank.

An apparatus for producing aqueous slaked lime solution, comprising;

• a dissolving tank;
• water supply piping connected to a lower part of the dissolving tank for introducing water into the dissolving tank;
• effluent piping connected to an upper part of the dissolving tank for discharging aqueous slaked lime solution from the dissolving tank;
• a stirring blade disposed within the dissolving tank in a bottom part thereof;
• a partition plate disposed within he dissolving tank and beside a side wall of the dissolving tank, said partition plate extending from above a surface of water in the dissolving tank to above the stirring blade for providing a slaked lime introducing zone which is surrounded by the partition plate and the side wall of the dissolving tank;
• a hopper disposed above the slaked lime introducing zone for introducing powder of slaked lime into the dissolving tank;
• and
• a fluidized slaked lime layer height-control device disposed within the dissolving tank in an outside part of the slaked lime introducing zone above the stirring blade for preventing slaked lime particles from ascending with ascending aqueous slaked lime solution in the dissolving thank, the fluidized slaked lime layer height-control device comprising a plurality of elongated members each having a longitudinal hole extending therethrough in such a manner that a longitudinal axis of each hole is disposed at an inclined angle with respect to a water surface in the dissolving tank, wherein an upper end of a lowermost member is disposed in contact with he partition plate and a lower end of an uppermost member is disposed in contact with a side wall of the dissolving tank.