浸出车间第一蒸发器有效利用的验证方法及相关注意问题Validation methods and considerations for effective use of first-stage evaporator in leaching plant

Abstract

浸出车间第一蒸发器的有效利用对整体的蒸发效果和热能的节约有着重要的意义。旨在为工厂的生产稳定和工艺的不断改进提供理论参考，介绍了混合油的基本特性，引用了两种方法验证第一蒸发器是否得到有效利用，并对蒸馏工艺中需要注意的问题进行了总结。第一蒸发器是否得到有效利用的验证方法一是通过负压合理性进行验证，二是通过实际换热面积是否得到有效利用进行验证。工厂可以通过两种验证方法对第一蒸发器是否得到有效利用进行初步的判断，并对相关工艺条件作出相关调整。第一蒸发器的有效利用涉及多个工艺步骤，蒸发器进口混合油浓度、二次蒸汽中含粕量、混合油的杂质含量、冷凝系统的稳定性等因素在实际生产中均需被关注，以保证第一蒸发器的有效利用。Effective use of the first-stage evaporator in leaching plant is of great significance to the overall evaporation effect and heat energy saving. Aiming to provide theoretical reference for the production stability and the continuous improvement of the process, the basic characteristics of the miscella were introduced, two methods were cited to verify whether the first-stage evaporator was effectively utilized or not, and the problems that need to be paid attention to in the distillation process were summarised. The rationality of the effective use of the first-stage evaporator could be verified by the reasonableness of the negative pressure, and by examining whether the actual heat exchanger area was effectively utilized or not. Factory can make a preliminary judgement on the effective use of the first-stage evaporator through these two methods, and adjust the relevant process conditions accordingly. The effective use of the first-stage evaporator involves a number of process steps, and factors such as the evaporator inlet miscella concentration, the meal content in the secondary vapour, the impurity content in the miscella, the stability of condensing system and so on in the actual production need to be concerned to ensure the effective use of the first - stage evaporator.

Keywords

• 浸出车间；第一蒸发器；混合油浓度；混合油温度；负压；蒸发面积
• leaching plant; first-stage evaporator; miscella concentration; miscella temperature; negative pressure; evaporation area