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1. 发明授权

US06179901B2 Apparatus and method for producing HF from phosphate rock 失效
标题翻译：磷酸盐岩生产HF的设备及方法
公开(公告)号：US06179901B2
公开(公告)日：2001-01-30
申请号：US09332085
申请日：1999-06-14
申请人： Louis J. Lamb
发明人： Louis J. Lamb
IPC分类号： B01D5314
CPC分类号： B01D53/1456
摘要： Hydrogen fluoride production apparatus removes phosphate rock dust from a hot gas mixture exhausted from a phosphate rock defluorination kiln; cools the hot gas mixture in a heat exchanger to a low enough temperature that it can be brought into contact with acid-resistant polymeric materials without destroying them; uses a water spray scrubber for further cooling the gas and absorbing the fluoride values as HF-rich liquor; and pumps the HF liquor to a holding tank. One such plant uses a gas tube steam boiler as the heat exchange and has several series-connected scrubbers to extract the fluorine values from the kiln exhaust so that the residual gas mixture can be exhausted into the atmosphere without exceeding permissible fluorine value levels. In this arrangement water is fed into the scrubber furthest from the boiler to extract HF from the process gas, and an HF-laden process liquor is fed out of the furthest scrubber into the second furthest scrubber, where it is sprayed into the gas stream. This counter-current flow arrangement continues until one reaches the scrubber closest to the boiler and extracts the most concentrated process liquor from a sump nearest the boiler.
摘要翻译：氟化氢生产设备从磷酸盐岩脱氟窑排出的热气体混合物中除去磷酸盐岩粉尘; 将热交换器中的热气体混合物冷却到足够低的温度，使其能够与耐酸的聚合材料接触而不破坏它们; 使用喷水洗涤器进一步冷却气体并吸收作为富HF的液体的氟化物值; 并将HF液体泵送到储罐中。一个这样的工厂使用气体管蒸汽锅炉作为热交换器，并且具有几个串联连接的洗涤器以从窑炉排气中提取氟值，使得残余气体混合物可以排放到大气中而不超过允许的氟值水平。在这种布置中，水被送入距离锅炉最远的洗涤器中以从处理气体提取HF，并且将含HF的处理液从最远的洗涤器送出到第二最远的洗涤器中，在那里喷射到气流中。这种逆流装置继续进行，直到到达最接近锅炉的洗涤器，并从最靠近锅炉的集水槽提取最浓缩的处理液。

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