Three-effect evaporation feed temperature and heat exchange issues
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Before the material enters the three-effect evaporation system, it is heated to the boiling temperature of the solution, which can reduce the steam consumption. How to achieve this? Before the material enters the evaporation system, it undergoes heat exchange through the heat exchanger. The temperature reached after the heat exchange should be affected by the pressure in the heat exchanger. How is the pressure in the heat exchanger controlled or determined by what? The heat exchanger is connected to the first-effect evaporator. Is the pressure in the heat exchanger the same as the pressure in the evaporator?
The material can be preheated with secondary steam or condensed water. If the secondary steam or condensed water contains corrosive substances, the preheater can be made into a two-way anti-corrosion type. Using secondary steam and condensed water to preheat materials can achieve the purpose of increasing revenue, reducing expenditure, and saving energy.
I’m not very clear about what you’re talking about, but I’d like to express my personal opinion below, for reference only. In general, three-effect evaporation systems often increase heat utilization by adding equipment. For example, the preheater mentioned on the second floor is a common method. The secondary steam generated by the evaporator is used to preheat the material, thereby increasing the feed temperature of the material to save steam. The other one also uses secondary steam, that is, adding a heat pump. For pressure issues, you can use a vacuum pump to adjust the vacuum level. (ball valve control)