Lime slaking device

Abstract

The invention discloses a lime slaking device, which comprises a pool type slaking tank or revolving drum slaker, and a steam pipe for introducing steam into the pool type slaking tank or the revolving drum slaker, wherein an opening for conveying lime into the steam pipe is formed in one side of the steam pipe. The lime slaking device disclosed by the invention has the remarkable characteristics that the lime is pre-slaked by the steam, wherein the slaking temperature always keeps at above 100 DEG C; the lime is high in activity and high in reaction speed and can be finally slaked after entering the pool type slaking tank or the revolving drum slaker; the produced lime milk is fin in granules, low in residue content, excellent in dispersibility and simple in technological process; and meanwhile, the lime slaking device is formed by simple modification on the basis of original equipment and is simple and convenient to operate, low in investment and easy to implement.

Description

technical field [0001] The invention relates to a lime digestion device, in particular to a lime digestion device for producing calcium carbonate. Background technique [0002] In the process of industrial production of calcium carbonate, there are usually two ways of lime digestion: rotary drum digestion and pool digestion. Generally, the temperature of the digestion water is heated to above 50-60°C with steam, and then the digestion water is directly contacted with lime. Digestive reactions. The digestion reaction is violent and a large amount of steam is generated, so the digestion temperature is 20-40°C higher than the digestion water temperature, so the reaction temperature is close to 70-100°C. Experiments have shown that the higher the digestion temperature is above 100°C, the solution will boil, the faster the digestion reaction, the more thorough the reaction, the finer the milk of lime particles, the lower the slag content, and the better the dispersion. However,...

AI Technical Summary

Problems solved by technology

However, the existing technology can only make the temperature of the digestion water close to 100°C. If the temperature of the digestion water is further increased, it is limited by the production cost; Time and economic costs also increase

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