The present invention relates to a method for producing a highly porous fine powdery slaked lime composition, comprising a fluidification step for forming said highly porous fine powdery slaked lime composition having an Alpine fluidity greater than 50% and which is carried out in a dryer/grinder chosen from the group consisting of a pin-type dryer/grinder, a cage-type dryer/grinder, an instantaneous dryer/disagglomerator and a combination of these until the powdery slaked lime composition has a non-solid residual-phase content of less than or equal to 3.5% by weight and greater than or equal to 0.3% by weight, as well as the product obtained therefrom.

The present invention relates to a method for producing a highly porous fine powdery slaked lime composition, comprising a fluidification step for forming said highly porous fine powdery slaked lime composition having an Alpine fluidity greater than 50% and which is carried out in a dryer/grinder chosen from the group consisting of a pin-type dryer/grinder, a cage-type dryer/grinder, an instantaneous dryer/disagglomerator and a combination of these until the powdery slaked lime composition has a non-solid residual-phase content of less than or equal to 3.5% by weight and greater than or equal to 0.3% by weight, as well as the product obtained therefrom.

The present disclosure relates to a milk-of-lime preparation apparatus and preparation method having waste heat recovery line, that may recover waste heat generated during preparation of liquid milk-of-lime and deliver the recovered waste heat to water, so as to supply the water at an optimal temperature necessary for a hydration reaction, thereby increasing the reaction efficiency and reducing the preparation time of the milk-of-lime. Especially, the milk-of-lime preparation apparatus consists of a water tank that receives room temperature water from a water supply pipe and stores the received water inside the water tank; a raw material input pipe that transfers calcine lime powder from one end to the other end through pressure supply from a BCT vehicle that carries the calcine lime powder; a water input pipe of which one end is connected with the water tank, and that receives the water stored inside the water tank and transfers the received water to the other end; a milk-of-lime tank that receives the water from the other end of the water input pipe, that receives the calcine lime powder from the other end of the raw material input pipe, and that stirs the received calcine lime powder and the water by means of a stirrer installed inside the milk-of-lime tank, to prepare and store milk-of-lime; a discharge pipe that is installed at one side of the milk-of-lime tank to discharge the milk-of-lime stored inside the milk-of-lime tank; and a waste heat recovery line that circulates the water such that the water stored inside the water tank exchanges heat with the milk-of-lime stored inside the milk-of-lime tank and then is stored back inside the water tank.

The present disclosure relates to a milk-of-lime preparation apparatus and preparation method having waste heat recovery line, that may recover waste heat generated during preparation of liquid milk-of-lime and deliver the recovered waste heat to water, so as to supply the water at an optimal temperature necessary for a hydration reaction, thereby increasing the reaction efficiency and reducing the preparation time of the milk-of-lime. Especially, the milk-of-lime preparation apparatus consists of a water tank that receives room temperature water from a water supply pipe and stores the received water inside the water tank; a raw material input pipe that transfers calcine lime powder from one end to the other end through pressure supply from a BCT vehicle that carries the calcine lime powder; a water input pipe of which one end is connected with the water tank, and that receives the water stored inside the water tank and transfers the received water to the other end; a milk-of-lime tank that receives the water from the other end of the water input pipe, that receives the calcine lime powder from the other end of the raw material input pipe, and that stirs the received calcine lime powder and the water by means of a stirrer installed inside the milk-of-lime tank, to prepare and store milk-of-lime; a discharge pipe that is installed at one side of the milk-of-lime tank to discharge the milk-of-lime stored inside the milk-of-lime tank; and a waste heat recovery line that circulates the water such that the water stored inside the water tank exchanges heat with the milk-of-lime stored inside the milk-of-lime tank and then is stored back inside the water tank.

A hydrated lime product exhibiting superior reactivity towards HCl and SO.sub.2 in air pollution control applications. Also disclosed is a method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles. The resultant lime hydrate product has available CaOH of greater than 92%, a citric acid reactivity of less than 20 seconds, a BET surface area greater than 18, a D90 less than 10 m, a D50 less than 4 m, a D90/D50 less than 3, and a large pore volume of greater than 0.2 BJH.

A lime hydrator integrated into a flue gas desulfurization system or other industrial system is provided that provides an in-situ variable rate of cured hydrated lime production for a variable supply rate of the in-situ produced cured hydrated lime for use within a flue gas stream as a moistened hydrated lime for a reduction of acid gas present in a flue gas stream. Also provided is a method of using a lime hydrator integrated into a flue gas desulfurization system or other industrial system to provide in-situ a variable production rate of cured hydrated lime for a variable supply rate of the in-situ produced cured hydrated lime for use within a flue gas stream as a moistened hydrated lime for a reduction of acid gas present in a flue gas stream.

A hydrated lime product exhibiting superior reactivity towards HCl and SO.sub.2 in air pollution control applications. Also disclosed is a method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles. The resultant lime hydrate product has available CaOH of greater than 92%, a citric acid reactivity of less than 20 seconds, a BET surface area greater than 18, a D90 less than 10 m, a D50 less than 4 m, a D90/D50 less than 3, and a large pore volume of greater than 0.2 BJH.

Calcium hydroxide-containing compositions can be manufactured by slaking quicklime, and subsequently drying and milling the slaked product. The resulting calcium hydroxide-containing composition can have a size, steepness, pore volume, and/or other features that render the compositions suitable for treatment of exhaust gases and/or removal of contaminants. In some embodiments, the calcium hydroxide-containing compositions can include a D.sub.10 from about 0.5 microns to about 4 microns, a D.sub.90 less than about 30 microns, and a ratio of D.sub.90 to D.sub.10 from about 8 to about 20, wherein individual particles include a surface area greater than or equal to about 25 m.sup.2/g.

A method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles.

A method of providing highly reactive hydrated lime and the resultant lime hydrate where an initial lime feed comprising calcium and impurities is first ground to a particle-size distribution with relatively course particles. Smaller particles are then removed from this ground lime and the smaller particles are hydrated and flash dried to form a hydrated lime, which is then milled to a significantly smaller particle size than that of the relatively course particles.