Design Of Pretreatment Of Water Softener

- Apr 11, 2019-

The water softener is mainly through ion exchange means to remove the calcium and magnesium ions in the water, thus reducing the hardness of the water. General surface water and water intake are mainly composed of calcium and magnesium ions.

Water softener operation has manual operation, by adjusting the valve for operation or anti-washing, regeneration and positive washing; the other is a fully automatic water softener, mainly through the setting of the automatic control head of the program, to complete the operation of anti-washing regenerative positive washing operation. The cationic resin of the water softener, because it is organic matter, so it is easy to be oxidized by oxidizing substances to make it lose the ability to exchange, such as chloride ions, ozone, or trivalent iron ions, another such as oil or organic matter, if attached to the resin, can also have an adverse effect on the exchange speed of the resin and exchange volume, So we have to add pretreatment before it, remove substances that are harmful to the resin, and protect the exchange performance of the resin.

There are mainly the following pretreatment that can be used as a soft water device: 1, if the water contains ferromanganese ions, the resin has serious damage, so in front of the softener, must remove ferromanganese ions, in surface water or water, if the iron ions exceed the standard, and manganese ions do not exceed the standard, then we use aeration plus a first-class manganese sand filter treatment can be, if the iron ion overshoot is not very large, Then we can use the jet aeration, and then add a mixture of air and water to fully mix, convenient for better iron oxide ions, if the iron ions exceed the standard is more severe, we use Degasification Tower aeration, degasification tower aeration using fan aeration, large air volume, good oxidation effect. However, if the content of iron and manganese in the water is exceeded, we use the Degasification Tower aeration plus the two grade manganese sand filter, because for manganese sand on the iron adsorption is stronger than manganese, in the first stage manganese sand filter is mainly to remove the iron in the water, the second stage manganese sand filter to remove the manganese in the water.

Manganese Sand filter flow rate is generally in 6-8m/h, but now many water treatment equipment plants and water treatment equipment companies in the design of iron and manganese filter, in order to save costs, increase the design flow rate, reduce production costs, affect the effect of iron and manganese filter. 2, quartz sand filter and activated carbon filter, quartz sand filter can mainly remove sediment in the water, small particulate matter and other impurities, to prevent hard impurities into the ion exchanger and yang resin friction, so that the resin crushing, in the design of water treatment equipment, quartz sand filter is a conventional pretreatment equipment,

Activated carbon filter because activated carbon has a tiny capillary tube, can adsorb the metal ions in the water, as well as oxidizing substances such as ozone and chloride ions and chlorine gas, protect the resin, extend the life of the resin. Softener follow-up treatment, mainly pay attention to broken or a small amount of leaking resin, so we generally need to add precision filter, microporous membrane filter or bag filter behind the water softener, the resin will be intercepted.