Function and principle of softened water
Function of softened water treatment
1. The use of softened water equipment saves a lot of waste fuel
When the boiler has scale, the boiler with working pressure of 1.4mpa will generate 1 mm scale, which will waste 8% of the fuel.
2. Increase thermal efficiency and reduce output of softened water equipment
When there is scale on the evaporation surface of the boiler, the heat on the fire side can not be transferred quickly, and the output of the boiler will be reduced on the water supply side. If the evaporation capacity of the boiler is reduced by one third due to improper water treatment and boiler scaling, the automatic operation line cannot be started due to insufficient gas supply.
3. Use of softened water equipment to reduce boiler maintenance
After the boiler plate or pipe has scale, it is very difficult to remove, especially due to the scale caused by boiler leakage, cracks, damage, deformation, corrosion and other diseases. It not only damages the boiler, but also consumes a lot of manpower and material resources to repair, which not only shortens the operation time, but also increases the maintenance cost.
4. Application of softened water equipment to reduce risk to safety
Boiler accidents caused by scale account for more than 20% of the total number of boiler accidents, which not only cause equipment loss, but also threaten personal safety. The capital construction and operation costs of water treatment account for a quarter of the savings.
Softened water treatment equipment
Softening water equipment, as the name suggests, is the equipment to reduce the hardness of water. It is mainly used to remove calcium and magnesium ions in water. Generally speaking, it is the equipment to reduce the hardness of water. Its main functions are to remove calcium and magnesium ions in water, activate water quality, kill bacteria and algae, prevent and remove scale. In the process of softening water, the total salt content in water cannot be reduced. It is widely used in hot water boiler system, heat exchange system, industrial cooling system, central air conditioning system and other water equipment system.
Because the hardness of water is mainly formed and expressed by calcium and magnesium, cation exchange resin (water softener) is generally used to replace Ca2 + and Mg2 + (the main component of scale formation) in water. With the increase of Ca2 + and Mg2 + in the resin, the efficiency of removing Ca2 + and Mg2 + by resin gradually decreases.
When the resin absorbs calcium and magnesium ions, it must be regenerated. The regeneration process is to wash the resin layer with salt water in the salt tank, replace the hardness ions on the resin, and discharge the regenerated waste liquid out of the tank, so that the resin can restore the softening exchange function.
Because the hardness of water is mainly formed and expressed by calcium and magnesium, because the hardness of water is mainly formed by calcium and magnesium and expressed by sodium ion exchange, the principle of softening treatment is to exchange the hardness components Ca2 + and Mg2 + in the water with Na + in the resin by passing the raw water through sodium type cation exchange resin, so as to absorb Ca2 + and Mg2 + in the water and soften the water.