Hot Lime Soda Process Diagram

Lime soda water softening process.

Hot lime soda process diagram. Hot and cold lime soda process 4 3 3 2014 5. Explain hot and cold lime soda process with the help of diagram process theroy follow via messages. In any warm lime or warm lime soda ash process temperature control is critical because temperature variations of as little as 4 f hr 2 c hr can cause gross carryover of the softener pricipitates. Hot process softening is usually carried out under pressure at temperatures of 227 240 f 108 116 c.

In lime soda ash softening process ca2 is removed from water in the form of calcium carbonate caco 3 s and mg2 is removed in the form of magnesium hydroxide mg oh 2 s. This process is now obsolete but was very useful for the treatment of large volumes of hard water. Soda ash is used to remove chemicals that cause non carbonate. Lime is used to remove chemicals that cause carbonate hardness.

Chemicals normally used are lime calcium hydroxide ca oh 2 and soda ash sodium carbonate na 2co 3. Addition of lime cao and soda na 2 co 3 to the hard. As a result precipitation becomes almost complete very quickly. If process is carried out at room temperature it is called cold lime soda process.

Lime soda process is one of the water softener systems. Soda lime is a process used in water treatment to remove hardness from water. Chemistry of soda lime process as slacked lime is added to a water it will react with any carbon dioxide present as follows. Soda lime is a process used in water treatment to remove hardness from water.

Hot lime soda process in the hot lime soda process the reactions take place at higher temperature near about boiling point of water. Ca oh 2 co2 caco3 h2o eq. 1 the lime will react with carbonate hardness as follows. Lime and soda process is used for water softening in this video i explain how it works suggested books for chemistry https amzn to 2lb7q4e engineering chemistry https amzn to 2vuzpbj b sc.

The chemical mixing process is same as the cold lime soda process but steam is applied in mixture tank. Lime soda ash softening process 10 when lime and soda ash are added hardness causing minerals form nearly insoluble precipitates. Addition of lime cao and soda na2co3 to the hard water precipitates calcium as the carbonate and magnesium as its hydroxide. 1 cold process i batch process.

By this process soluble magnesium and calcium salts are removed as calcium carbonate and magnesium hydroxide precipitated. The hardness is 50 60 ppm by cold process about 15 30 ppm by hot process. Lime softening 1 lime softening. Chemical precipitation is one of the more common methods used to soften water.