Control of two-effect evaporators
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This post was last edited by Qingse Nianhua on 2018-8-27 at 11:19. For a two-effect evaporator with intermittent feeding and a constant total feed amount, how can this situation be controlled?
Could you be more specific? How are you controlling it currently? Do you want automatic control? Generally, for evaporation to proceed properly and ensure stable product quality, it is necessary to maintain stability in the feed and discharge rates as well as a constant liquid level. You need to feed the material in intervals – is the amount of material relatively small? How often?
It’s two-stage evaporation, right? Multi-effect evaporation is generally operated in a steady manner, while batch operation usually employs multi-stage evaporation
The evaporation temperature is set based on the thermal sensitivity of the material and the corrosion resistance requirements of the equipment; the feed rate is controlled by the evaporator level, while the final concentration is controlled by a densitometer