钙型卤水不净化MVR制高纯盐案例分析

Creating Value From Salt Cavern Brine

文章提供了一个在美国的钙型卤水生产氯化钠结晶系统案例,料液卤水来自一个即将作为天然气储存洞穴。主要工艺技术是利用一个单级HPD MVR制盐结晶器,未经卤水净化,生产纯度99.85%且粒径分布窄的盐。该系统设计独特,不需要卤水净化。取消卤水净化环节可以降低系统的投资和运行成本。该系统不仅成本低,而且在线率高。

This paper provides a case study of a Na Cl salt crystallization system in the United States with feed brine evacuated from a deposit to be utilized as a gas storage cavern. The main process technology is a single-stage HPD. Salt Crystallizer designed to process the brine to an end product of a specified quality and crystal size. The product salt is marketed for use in the food and textile industries.The design of the system is unique in that the process does not require pretreatment of the brine. Based on the analysis of the brine, it was determined that the client＇s purity requirements could be achieved by direct feed into the Crystallizer system without brine softening upstream of the process. Eliminating the need for pretreatment reduces the initial capital expenditure for the plant and minimizes on-going operational costs for chemicals and manpower. Operational data is provided within that demonstrates the performance of the crystallization system in terms of salt production, salt purity, and cleaning frequency.