Why DM water is used in power plant?

Demineralized water is required particularly for boiler feed purposes. In case where the total dissolved solids (TDS) of the raw water is very high, demineralized (DM) water is used for the cooling tower make–up water. In one variation, DM water is used as the make–up water for the urea plant direct cooling tower (CT).

Why is it important to use the demineralized water?

Certain impurities in water can easily render many laboratory applications useless. For these reasons, demineralised water is used as a way to ensure that chemical processes are kept precise, conditions are kept sterile and results are kept reliable.

What is DM water in thermal power plant?

Demineralization is the process of removing mineral salts from Water by using the ion exchange process. Demineralised Water is Water completely free ( or almost ) of dissolved minerals as a result of one of the following processes : Distillation. Deionization.

What is the use of DM plant?

DM plants are systems used for removing minerals and other solid contaminants from water. How does a DM plant work? These units produce mineral-free water using a method like ion-exchange, polishing, or degasification.

What is DM water?

Demineralised water is water that has been purified in such a way that (most of) its mineral- and salt ions are removed. You can think for example of Calcium, Chloride, Sulphate, Magnesium and Sodium. Demineralised water most times has less mineral ions; this is dependent on the way it is produced.

What is demineralized water used for in the power industry?

In the power industry, demineralized water is often used for boiler feed water and steam generation. Boilers that generate steam to power turbines require high-pressure boilers and therefore more complex feed water treatment system to remove as many impurities as possible.

What is the use of DM water in urea plant?

In one variation, DM water is used as the make–up water for the urea plant direct cooling tower (CT). This is because a small quantity of the circulating water is recycled in the process. DM plant consists of cation and anion exchange units followed by a mixed bed unit.

What is a DMDM plant?

DM plant consists of cation and anion exchange units followed by a mixed bed unit. Usually, cation exchange units are regenerated by sulphuric acid. A few industries use hydrochloric acid for regeneration. The anion exchange units are regenerated by sodium hydroxide.

What happens to the water in a power plant?

Water is withdrawn from the source and run once through the power plant (hence the name) to cool down the steam. The water is then discharged back to the source a few degrees warmer. Since it withdraws large volumes of water it kills fish and other organisms in the process.