Reasons why the evaporation vacuum level cannot be increased after a full cycle of the aqueous solution
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This post was last edited by qsy on 2011-8-1 at 18:17. Reasons why the vacuum level cannot be increased during the full circulation of the aqueous solution in evaporation – what potential problems do you think might exist? Thanks!
I’m not very familiar with aqueous solutions, but I think the evaporation system is similar to the CO2 stripping process. It’s possible that there is an issue with the circulation system in the previous stage, which leads to an excessive ammonia content in the urine; this ammonia then escapes during heating. Check whether there are any leaks in the evaporation system, and also verify whether the steam pressure of your injector is too low
The last edit to this post was made by fjhuyuyang on 2011-7-25 at 11:23. Some possible reasons why a vacuum cannot be established are: 1. The concentration of urine coming from the previous stage is too low, resulting in a high evaporation load in that stage. 2. Faults in the evaporation ejector, including clogged ejector nozzles and insufficient power of the ejector. 3. Reasons for a section of evaporative water coolers, including issues with the cooling water system, poor flow of liquid beneath the water cooler, and leaks in the water cooler. 4. There is a leak in the evaporation system. 5. Improper control of the two-stage liquid level led to air leakage into the first-stage evaporation system.
There is a leak in the evaporation system or the surface cooler does not provide adequate cooling； A section of the ejector lacks sufficient capacity.
1. Low low-pressure steam pressure. 2. Clogged jet pump. 3. Poor condensation performance of the surface cooler, with severe crystallization in it. 4. Excessive vapor-phase polymers or leakage points. 5. Faulty instruments or valves. On-site treatment method: Flush the throat and surface cooler with water； If the vacuum level still cannot be increased, turn off the steam to the jet pump completely, wait for 30 seconds, then turn it back on again to allow steam to purge the surface cooler ； A simpler and more effective method is to turn off the condensate water of the surface cooler for 1 minute, allowing the biuret inside to melt and fall off due to the high temperature.
Today, during a short shutdown, it was discovered that water had evaporated due to a leak in the vaporizer, which prevented the vacuum level in that section of the evaporation system from being maintained
If the vacuum in the evaporation heater leaks and cannot be restored, overheating during evaporation may occur.