Regarding the issue of steam consumption in the evaporator
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Taking a three-effect parallel flow evaporator as an example, 400 KG of steam is required to evaporate one ton of water under normal conditions. How can steam consumption be reduced below 400 KG? No heat pump is used; a three-effect evaporator is employed instead. Is it low-temperature evaporation? Or some other method? Why?
This post was last edited by CHANGBAISHI on 2018-10-10 08:59. If no pump is used to move the fluid, how can thermal energy be transferred? The conversion of thermal energy between the two fluids essentially involves reducing thermal resistance; you just need to find out which method isn’t yet perfect and improve it, that’s all :) Another factor is the heat exchange method – the mixed-type method yields the best results. Is it possible to switch from partitioned heat exchange to mixed-type heat exchange, or to other forms of heat exchange?
On the second floor, the flow of liquid inside the evaporator is caused by temperature differences resulting from pressure differences; the function of a heat pump is to reduce the use of steam. According to what you said, then what is the case with naturally circulating evaporators? Right? A circulation pump is used to force circulation in the evaporator.
The key is to reduce heat loss! For example: 1. The heat retention effect should be good ； 2. Preheating of secondary steam stage by stage ； 3. Waste heat recovery from condensate water. However, it’s still quite difficult to keep it below 400 kg.
The scholar, cgp188, gave a good response: the key is to reduce heat loss! For example: 1. The heat retention effect should be good ； 2. Preheating of secondary steam stage by stage ； 3. Waste heat recovery from condensate water.
Operate under vacuum to lower the boiling point and reduce vapor usage
It can’t be reduced, right? We use negative pressure triple-effect for our customers. That’s it then.
The consumption of steam for production depends mainly on the temperature of the raw materials, as well as on the evaporation area in each stage and whether the temperature differences are appropriate. To evaporate 1000 kg of water using steam with a weight less than 400 kg, the MVR evaporation method can be employed