-
公开(公告)号：US5316748A
公开(公告)日：1994-05-31
申请号：US990052
申请日：1992-12-14
申请人： Gordon F. Palm , R. George Hartig
发明人： Gordon F. Palm , R. George Hartig
IPC分类号： C01B25/225 , C02F1/52 , C02F1/58 , C02F1/66 , C01B25/16
CPC分类号： C01B25/225 , C02F1/5236 , C02F1/583 , C02F1/66 , C02F2101/006 , Y02W10/37
摘要： Generation, use, and treatment of new and unique process waters in or for wet-process phosphoric acid manufacturing to substantially eliminate discharge of contaminants to the environment. Acid pond water from conventional wet-process phosphoric acid manufacturing, contaminated with compositions containing fluorine, heavy metals, and radioactive elements such as radium-226, plus residual P.sub.2 O.sub.5, is superseded. Substantially all contaminants from the wet-process are insolubilized and removed, whereas P.sub.2 O.sub.5 normally lost is recovered. Decontaminated gypsum stack water with a mildly acidic pH results from stepwise raising of wastewater pH, with clarification, and subsequent re-acidification, to provide a decontaminated process water with slightly acidic pH adapted to match the pH of environmental ground water. The process is made more economical, while enhancing protection of surrounding air, soil, and water from contaminants.
摘要翻译： 生产，使用和处理新的和独特的工艺水在湿法磷酸制造中或用于湿法磷酸制造，以基本上消除污染物排放到环境中。 来自常规湿法磷酸制造的酸池塘水，被含有氟，重金属和放射性元素如镭-226，加残留的P2O5的组合物污染的酸池塘水被替代。 基本上来自湿法处理的所有污染物都是不溶解和去除的，而通常丢失的P2O5被回收。 具有温和酸性pH的去污石膏堆积水由逐渐提高废水pH值，澄清和随后的再酸化而提供，以提供具有微酸性pH的去污过程水，以适应环境地下水的pH值。 该过程更经济，同时增强对周围空气，土壤和水的污染物的保护。
-
公开(公告)号：US06235257B1
公开(公告)日：2001-05-22
申请号：US08269979
申请日：1994-07-01
申请人： Gordon F. Palm , R. George Hartig
发明人： Gordon F. Palm , R. George Hartig
IPC分类号： C01B2516
CPC分类号： C01B25/225 , C02F1/5236 , C02F1/583 , C02F1/66 , C02F2101/006 , Y02W10/37
摘要： Modification of phosphoric acid manufacturing provides improved process waters: decontaminated water pH-adjusted to be only slightly acidic, scrubber process water, gypsum stack water, and a composite of the latter two waters. The composite water undergoes two-stage neutralization with clarification, eliminating precipitatable contaminants, in forming the pH-adjusted water, which in turn is useful in forming scrubber process water or gypsum stack water, as needed, Resulting gypsum stacks and rainfall surge ponds, having been made relatively fluoride-free through such processing modification, and preferably also having been lined, supersede previous gypsum stacks and acid gypsum ponds—whether lined or not.
摘要翻译： 磷酸制造的改进提供了改进的工艺用水：净化水pH调节至仅为微酸性，洗涤工艺水，石膏堆积水和后两个水的复合材料。 复合水通过澄清进行两级中和，消除可沉淀的污染物，形成pH调节的水，根据需要，其又可用于形成洗涤器工艺水或石膏堆水，所得的石膏堆和降雨量池，具有 通过这种处理改性使其相对无氟化，并且优选地也已经衬里，取代了之前的石膏堆和酸性石膏池 - 无论是否衬里。
-
公开(公告)号：US5171452A
公开(公告)日：1992-12-15
申请号：US669643
申请日：1991-03-14
申请人： Gordon F. Palm , R. George Hartig
发明人： Gordon F. Palm , R. George Hartig
IPC分类号： C01B25/225 , C02F1/52 , C02F1/58 , C02F1/66
CPC分类号： C02F1/583 , C01B25/225 , C02F1/5236 , C02F1/66 , C02F2101/006 , Y02W10/37 , Y10S210/906 , Y10S210/915
摘要： Phosphoric acid wastewater treatment to substantially eliminate discharge of contaminants to the environment. Acid pond water from conventional wet-phosphoric acid manufacturing is replaced by gypsum pond water having a pH closely matching that of the surroundings. Essentially all fluorides are insolubilized and substantially all phosphoric acid is recovered, minimizing loss to the environment.
摘要翻译： 磷酸废水处理基本上可以消除污染物排放到环境中。 来自常规湿磷酸制造的酸池塘水由具有与周围环境相当的pH的石膏池塘水代替。 基本上所有的氟化物都是不溶的，并且基本上所有的磷酸被回收，从而使对环境的损失最小化。
-
公开(公告)号：US4320012A
公开(公告)日：1982-03-16
申请号：US175966
申请日：1980-08-07
申请人： Gordon F. Palm , R. George Hartig
发明人： Gordon F. Palm , R. George Hartig
CPC分类号： C02F1/66 , Y10S210/906 , Y10S210/915
摘要： Method for neutralizing waste cooling pond waters of wet process phosphoric acid plants, and for neutralizing similar waste waters from phosphate complexes, wherein neutralization is performed in two stages and wherein the flocculent precipitate from the second neutralization stage is disposed of by dissolving it in incoming untreated waste water prior to the first neutralization stage. Neutralization in the first neutralization stage is accomplished by addition of limestone to the waste water, and neutralization in the second neutralization stage is accomplished by addition of limestone to the water phase from the first neutralization stage. The precipitate from the first neutralization stage is readily separable from the liquid phase, and is suitable for disposal in the gypsum stack of a wet process phosphoric acid plant. The fully neutralized water meets federal and state requirements for disposal in surface and underground water systems as to pH and as to fluoride and phosphate content. Lime, instead of limestone, may be used for neutralization in the first neutralization stage, but this procedure will increase operating costs somewhat in most cases.
摘要翻译： 用于中和湿法磷酸装置的废物冷却池塘水的方法，以及用于中和磷酸盐络合物的类似废水，其中中和在两个阶段进行，并且其中来自第二中和阶段的絮凝沉淀物通过将其溶解在未处理的进料中 在第一次中和阶段之前的废水。 通过向废水中添加石灰石来实现第一中和阶段的中和，并且通过从第一中和阶段向水相中加入石灰石来实现第二中和阶段的中和。 来自第一中和阶段的沉淀物容易与液相分离，并且适于在湿法磷酸装置的石膏堆中处理。 完全中和的水符合联邦和州的表面和地下水系统处理pH要求以及氟化物和磷酸盐含量的要求。 在第一次中和阶段，石灰代替石灰石可用于中和，但这种方法在大多数情况下会有一定程度的提高运营成本。
-
公开(公告)号：US5366640A
公开(公告)日：1994-11-22
申请号：US120331
申请日：1993-09-14
CPC分类号： C02F1/66 , C02F2101/006 , Y02W10/37 , Y10S210/912 , Y10S210/915
摘要： Converting wet-process phosphoric acid operations, to minimize and nearly eliminate discharge of contaminants to the environment, by generation, use, and treatment of new and unique process waters. Fluorides and other contaminants soluble under acidic conditions are insolubilized, and substantially all phosphoric acid is recovered. Acid pond water from conventional wet-process phosphoric acid manufacturing is replaced by neutralized gypsum stack water having a pH closely matching that of the surroundings. Both air and ground water contamination are reduced to essentially negligible levels.
摘要翻译： 转化湿法磷酸操作，通过生成，使用和处理新的和独特的工艺水来最大限度地减少和几乎消除污染物排放到环境中。 在酸性条件下溶解的氟化物和其它污染物不溶解，并且基本上全部回收磷酸。 来自常规湿法磷酸制造的酸池水被具有与周围环境密切匹配的pH的中和石膏叠层水替代。 空气和地下水污染都被降低到几乎可以忽略的水平。
-
-
-
-
搜索结果
5 条记录 (耗时 0.012 秒)
