The water feed to the boiler must not contain any dissolved solids. This type of water is known as demineralized water. Dissolved solids such as hardness and other mineral salts will result in the scaling and deposits in the boiler.
The demineralized water treatment system available to remove the total dissolved solids from water includes:
Demineralized water quality for feed to boiler has to be in the range of 0.1 to 0.5 uS/cm depending on the type of boilers. Demineralized/ Deionized Water is also required for power generation, gas turbine washing, hot-water loop make-up water and for fuel gas heater cleaning.
Source of feed water to produce demineralized water includes seawater, river water, lake water, well water, service water, industrial water and etc. However, these various feed water sources are not suitable for direct feed to the demineralized water treatment system. Pre-treatment will be required to condition the water before feeding to the demineralized water treatment system.
Different type of pre-treatment shall be applied to different type of feed water. Types of pre-treatment includes:
Hitachi Aqua-Tech has the expertise to design, fabricate and commission a complete treatment system to produce demineralized water.
