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公开(公告)号:US4059513A
公开(公告)日:1977-11-22
申请号:US770826
申请日:1977-02-22
申请人: Karel V. Zadera
发明人: Karel V. Zadera
摘要: High sulfate content water is treated in a multistage process to remove sulfate and hardness. Sulfate concentration is reduced in the first stage of the process by addition of calcium hydroxide. Calcium concentration is reduced in the second stage of the process by reaction of carbon dioxide or bicarbonate and calcium and hydroxide ions from the first stage of the process, forming insoluble calcium carbonate.
摘要翻译: 高硫酸盐含量的水以多步法处理以除去硫酸盐和硬度。 通过加入氢氧化钙,在该方法的第一阶段硫酸盐浓度降低。 在该过程的第二阶段,通过二氧化碳或碳酸氢盐与钙和氢氧根离子从该方法的第一阶段的反应而降低钙浓度,形成不溶性碳酸钙。