Regarding the issue of caustic soda evaporation
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1. What is the frequency of shutdowns for the alkali evaporation system? How often is it shut down? Reason for parking? 2. What are everyone’s opinions on the issue of perforations in falling film tubes? How long is the service life of these tubes? Cause of the perforation? How to prevent and control it? 3. What is the concentration of the alkaline solution after pre-concentration evaporation? What is the vacuum level controlled by the vacuum pump? 4. What causes caustic soda to be gray in color?
Why isn’t there anyone? Waiting for a reply.
1. What is the frequency of shutdowns for the alkali evaporation system? How often is it shut down? Reason for parking? This should be related to your production plan; the other cases are due to issues with your equipment that caused shutdowns. 2. What are everyone’s opinions on the problem of perforations in the falling film tubes? How long is the service life of these tubes? Cause of the perforation? How to prevent and control it? The perforation of the falling film tube is probably caused by local corrosion; I really don’t know much about this. The service life of falling film tubes is generally around 1 to 3 years. On the one hand, it depends on the appropriate level of chlorates in the alkali and the amount of sugar added; on the other hand, it is related to the frequency of starting up and shutting down the system, as each such operation increases the corrosion of the nickel material in the falling film tubes. 3. What is the concentration of the alkali solution after pre-concentration evaporation? What is the vacuum level controlled by the vacuum pump? Currently, the alkali concentration after pre-concentration is around 61%. The vacuum pump operates at -92 KPa. What causes caustic soda flakes to be gray in color? Is it turning gray because too much sugar was added?