Working principle and cleaning method analysis of multi effect distilled water machine

Working principle of multi effect distilled water machine: multi effect distilled water machine is a steam heated distilled water production equipment with deionized water as raw water The distilled water produced by the equipment has stable quality, high purity and no pyrogen At present, Zui is the key equipment of widely used WFI preparation system The multi effect distilled water machine adopts high temperature and high pressure operation to ensure stable production of non pyrogenic injection water The distilled water produced by the multi effect distilled water machine completely meets the requirements of water for injection in the current USP, EP, JP and CP Analysis of cleaning methods for multi effect distilled water machine: (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 ℃ Key words: multi effect distilled water machine, falling film evaporator, pure steam generator, chamber filter press