Experience in the design and use of triple-effect evaporators

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This post was last edited by goldliyang on 2020-7-23 at 18:15. Having some experience with triple-effect evaporators, I would like to summarize some key points to keep in mind during design and operation as follows: 1. Accident tanks or emergency discharge tanks should be considered during the design phase; otherwise, in cases of power outages or shutdowns that require maintenance, the material inside the evaporator can pose a significant problem. 2. When dealing with materials that tend to cause blockages or crystallization in the pipes, factors such as the inclination angle of the pipelines and the need for flushing and heating to remove residues must be taken into consideration; otherwise, once a blockage occurs, dealing with it will be a difficult task. 3. In the event of an emergency during production, stop the steam supply first to prevent more serious problems from occurring. 4. When selecting a pump, it is advisable to choose ones with a slightly lower rotation speed and larger impellers; such pumps have a relatively lower failure rate due to their lower speed. 5. It is advisable to use soft water for the cooling water of mechanical seals in pumps, and a separate seal water system should be installed. In the past, recycled water was often used, but since it is relatively dirty, it can easily cause damage to the mechanical seals. 6. For vacuum pumps, water ring or water jet vacuum pumps can be chosen; in situations with severe corrosion, a PPR water jet vacuum pump should be given priority. 7. The lubricating oil of the pump should be replaced regularly. 8. When the ambient temperature during equipment shutdown is below 0°C, all water accumulated in the equipment and its pipelines must be drained to prevent freezing damage or pipeline blockage. 9. Adjusting the evaporator level should be done slowly, without making large fluctuations. 10. Adjust the steam valve slowly. 11. The *heater of the evaporator must be equipped with a safety valve, which allows steam pressure inside the heater to be released in a timely manner in case of overpressure; care must not be taken lightly.