Design And Experimental Validation Of A Six-Effect Multi-Effect Evaporation Plant Utilized In Oilfield

This paper focuses on desalination process of oilfield sewage and chooses multi-effect evaporation (MEE) as the main device for treatment. A mathematical model is built to describe the MEE system for sewage. It is necessary to mention that the model shows a good function of treating oilfield sewage and the fouling of the evaporator is avoided via reasonable design. Also, a six-effect experimental platform with a small capacity is designed to validate the model. Sufficient experiments are carried out and the quality of the fresh water from the system meets the requirement of oilfield reinjection. The data from the experiments are compared with the calculation and the steam loss of the model is adjusted according to vacuum degree of the evaporator. Results show that the performance ratio is 4.776 and the gained output ratio is 4.537 and the average difference between calculation and experiment is less than 4.5%.