Requirements and principles for cleaning of tubular multi effect distilled water machine

The tubular multi effect distilled water machine is a kind of energy-saving distilled water production equipment Due to its reliable performance and stable quality of distilled water, it has been widely used Like other water treatment devices, multi effect distilled water machine also needs maintenance in the process of use Cleaning is one of the important items According to the structural characteristics of multi effect distilled water machine, chemical cleaning is generally used Requirements and principles for cleaning of tubular multi effect distilled water machine: when the water yield of the multi effect distilled water machine is obviously decreased in the use process, or obvious scaling is found in the tower in the routine inspection, the cleaning shall be carried out The main reason for scaling is that the residual inorganic salt in the feed water contacts with the inner wall of the equipment for a long time and forms under high temperature and pressure There are two kinds of scale produced in multi effect distilled water machine, one is boiler scale, the other is silica scale Different cleaning agents should be used in cleaning 1 For boiler scale, sulfamic acid (nh2so2oh) can be used When using, deionized water is used to prepare a cleaning solution with a concentration of 1% Its pH value is between 1 and 2, and it is heated to about 60 ℃ Phosphoric acid (H3PO4) can also be used to prepare a 2% cleaning solution with deionized water and heating to about 65 ℃ 2 For silica scale, ammonium difluoride (NH4HF2) can be used to prepare a 1.5% solution with deionized water and heating to 50 ℃ ~ 60 ℃.