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Why is the Hot lime Soda process preferred over the Cold lime soda process?
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written 3.4 years ago by
teamques10
★ 67k
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| Cold Lime Soda Process | Hot Lime Soda Process |
|---|---|
| It is carried out at room temperature (250C - 300C) | It is carried out at high temperatures (950C - 1000C) |
| It is a slow process | It is a rapid process |
| Use of coagulant is necessary | Use of coagulant is not necessary |
| Filtration is not easy | Filtration is easy as viscosity of water is low |
| Residual hardness is 60 ppm | Residual hardness is 15 - 30 ppm |
| Dissolved gases are not removed | Dissolved gases are removed |
| It has low softening capacity | It has high softening capacity |
Hot lime Soda process is preferred over the Cold lime soda process because
- In Hot Lime Soda process, reaction proceeds faster due to temperature.
- It requires no coagulants because sludge is formed rapidly.
- Viscosity of softened water is lower, so filtration becomes much easier.
- It produces water of hardness with 15-30 ppm.
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