What's The Difference Between Sodium Ion Exchangers And Mixed Beds?

What's the difference between sodium ion exchangers and mixed beds?

 

With the development of science and technology, many fields such as food processing and domestic water have begun to apply resin softened water equipment. The commonly used softening method of water softening equipment is ion exchange method.

 

And what is ion exchange? In simple terms, it is a method of separation by using the different ion exchange capabilities between the exchangeable groups in the ion exchanger and various ions in the solution. The ion exchange method relies on the ion exchanger.

There are many types of ion exchangers, sodium ion exchangers and mixed beds are two of them.

 

Sodium ion exchanger, also known as softener, is used to remove calcium ions and magnesium ions in water to make softened water ion exchanger;

 

The mixed bed, also known as the mixed ion exchange column, is generally placed after an electrodialyzer or reverse osmosis device (or directly applied to water with low salt content), and further desalting of water can produce higher purity water.

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How does a sodium ion exchanger work?

The hardness of water is mainly composed of calcium and magnesium ions. When raw water containing hardness passes through the resin layer in the water softener, calcium and magnesium ions in the water are exchanged and adsorbed by the resin, and sodium ions are released at the same time. The water that flows out of the water softener is the softened water that has removed the hardness ions.

When the resin absorbs a certain amount of calcium and magnesium ions, it is necessary to be regenerated, and the regeneration process is to wash the resin layer with salt water in the salt box, and replace the hardness ions on the resin, and then discharge the recycled waste liquid outside the tank, the resin will restore the ability of softening exchange.

What are the classifications of sodium ion exchangers?

According to the operation mode: fixed bed, continuous exchange bed, floating bed.

The fixed bed can be divided into: downstream regeneration fixed bed, counter-current regeneration fixed bed. Continuous exchange bed can be divided into: mobile bed, mobile bed.

According to the flow control mode of ion exchanger water production, regeneration and flushing, it is divided into integrated valve control form and separate multi-valve control form.

Application range of sodium ion exchanger:

The softening of high hardness drinking water, the softening of raw water of domestic hot water, the pretreatment of domestic direct drinking water equipment, the softening of boiler water and various kinds of heat exchanger supplementary water, and the softening of circulating cooling water of air conditioning system.

Mixed Bed:

What is the principle of mixed bed?

The mixed bed is to mix a certain proportion of positive and anion exchange resin into the same exchange device to exchange and remove ions in the fluid. Because the specific gravity of the positive resin is larger than that of the negative resin, the negative resin is on the top of the positive resin in the mixed bed. When backwashing, the upper alkali and the lower acid are discharged in the middle.

How to classify mixed beds?

According to the different regeneration methods of the mixed bed, the mixed bed can be divided into two types: in vivo regeneration and in vitro regeneration.

What are the characteristics of the mixed bed?

The effluent water quality is good and stable;

Intermittent operation has little effect on effluent quality.

The exchange end point is obvious, which is conducive to supervision and automatic control;

Less equipment than double bed, centralized layout.

Application range of mixed bed:

Widely used in electronics, chemical, medicine, atomic energy, electric power and other industries.

Sodium ion exchanger and mixed bed each have advantages: mixed bed effluent water quality requirements are higher than sodium ion exchanger, can prepare ultra-pure water, can be used in special industries; And sodium ion exchangers can meet the basic needs of softened water in life. You can choose different types of ion exchangers according to your needs.