Cleaning method and technical characteristics of multi effect distilled water machine

The tubular multi effect distilled water machine is a steam heated distilled water production equipment with deionized water as raw material water The distilled water produced by the equipment has stable quality, high purity and no pyrogen It is in line with the provisions of "water for injection" in Chinese Pharmacopoeia (version 05) It is an ideal equipment for pharmaceutical manufacturers and drinking distilled water production plants, such as blood products, injections, large infusion, biological antibiotics, etc Working principle of tubular multi effect distilled water machine: the working principle of tubular multi effect distilled water machine is to remove non condensable gas and impurities through multi effect evaporation and condensation of fully heated raw water, so as to obtain high-purity distilled water In order to ensure the quality of distilled water, the raw water must be pretreated Because of multi effect evaporation, the heat is fully utilized Equipment and cleaning methods required for cleaning of multi effect distilled water machine: 1 Types of scale and corresponding cleaning agents 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 shall be used for 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, and deionized water is used to prepare a cleaning solution with a concentration of 2%, which is heated to about 65 ℃ 2 For silica scale, ammonium difluoride (NH4HF2) can be used When it is used, deionized water can be used to prepare a solution with a concentration of 1.5%, and heated to 50 ℃ ~ 60 ℃ Sodium hydroxide + anionic active agent can also be used to prepare a cleaning solution with a concentration of 10% and heated to about 60 ℃ In the chemical cleaning method to remove the above two kinds of scale, many users also use the general-purpose stainless steel cleaning agent, the effect is good, and the use is more convenient After cleaning with acid solution, neutralization solution is generally required The neutralization solution was prepared by adding 0.5% sodium bicarbonate (hahco3) and 0.1% anionic surfactant into deionized water Cleaning steps of multi effect distilled water machine 1 Preparatory work 2 Cleaning 3 If there are boiler scale and silica scale, clean them The method is the same as above, which has been introduced before If there is no silica scale, it can enter the neutralization stage 4 Intermediate stage 5 Ending operation