The issue of liquid accumulation in the vapor separation unit
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We use the full-circulation aqueous solution method (1830) combined with Hydrotec’s large-particle granulation process; the production capacity of 1,200 tons per day has been normal. However, recently the vacuum level has not been good (–0.058 kPa), preventing an increase in production volume. Upon inspection, it was found that there was a leak in the tubes of the first vaporizer, and the plates of the cyclone separator had fallen into the surface cooler. After welding to fix these issues and increasing the production volume, liquid accumulated in the first vaporizer separator, and no liquid level could be seen through the sight glass. The melting pump was functioning properly, and the liquid delivery pipe showed no signs of blockage; yet still, no liquid flowed. I seek help from fellow industry professionals to analyze the cause (We only have one stage of evaporation) This post was last edited by lxq700918 on 2009-3-20 at 12:57.]
It might be that after welding, the condition is different from that of the original equipment, or mechanical impurities got in during the processing due to carelessness.
There is a leak in one of the discharge pipes of the evaporation separator; air gets drawn in, creating an air blockage that prevents urine from flowing downward. It is recommended to stop the evaporation process and add water to test for leaks; once the leak is fixed, normal operation will be restored.
How about a two-stage vacuum? If there are leaks in the second section and a vacuum cannot be created, it will also cause fluid to accumulate in the first section.
The original poster has made it clear – there is only a section of vacuum! I think the main reasons are: 1. I agree with the opinion of ttlkk from the 3rd floor; there might be some overlooked issues, with air entering and bringing the load on the evaporation injector close to or above its capacity. 2. Carefully check the vapor phase of a section of the evaporator and the surface cooler for blockages caused by mechanical impurities or other foreign objects. 3. Check whether the power steam used by an evaporation injector contains liquid droplets (i.e., steam condensate) If this phenomenon occurs, it will also make vacuuming difficult.
Now the vacuum is easy to lift, at (—0.070), and I think it’s too easy to lift; sometimes it’s necessary to break the vacuum. However, the temperature dropped to 128 degrees, the biuret level was around 1.1, and the moisture content was acceptable. At a load of 85%, the material discharge is unstable, resulting in liquid accumulation. Is there an imbalance in internal pressure in a steam separator? Or does the mixing of opposing qi lead to qi obstruction?
The experts mentioned above spoke very well. Based on the feedback you’ve provided, I also suggest that you check for any leaks; it’s quite likely that the fluid accumulation is caused by air leakage. We have encountered similar situations before. Hehe, don’t forget to post and let us know once you find out the reason.
Let me talk about the relationship between Stage 1 and Stage 2 vacuum: if the vacuum in Stage 1 is insufficient, does it have an impact on the vacuum in Stage 2? There definitely are; no manufacturer can ensure a second stage of vacuum when the first stage lacks sufficient vacuum. The vacuum in Stage 1 is insufficient, so the load shifts to Stage 2, which affects the vacuum in Stage 2. In fact, the chemical production process is systematic; therefore, when observing and analyzing problems, one must not forget the overall perspective and avoid looking at things in an isolated or one-sided manner. This post was last edited by lxq700918 on 2009-3-21 19:54.]