用于从窑法磷酸工艺水化吸磷后的烟气中回收氟的设备及工艺

• Format: Patent
• Language: Chinese
• Published: 08.02.2017
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOUNDS THEREOF; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING

本发明公开了种用于从窑法磷酸工艺水化吸磷后的烟气中回收氟的设备及工艺，该设备包括、二级氟吸收塔，且均为流态化逆流式洗涤塔，级氟吸收塔主要由氟硅酸洗涤管和氟硅酸分离罐组成，分离罐顶部设有烟气出口，底部的氟硅酸液出口通过循环输送管道与氟硅酸洗涤管相连通；二级氟吸收塔的主体结构与级氟吸收塔类似，二级氟硅酸分离罐的顶部设有除沫层和烟气出口，底部的氟硅酸液出口通过循环输送管道与二级氟硅酸洗涤管内的喷嘴和级氟吸收塔的氟硅酸分离罐相连通。本发明的氟回收工艺依次包括级氟吸收、级气液分离、二级氟吸收、二级气液分离等多个操作。本发明具有结构简单、投资成本低、原料利用率高、氟回收效果好等优点。 A device and process for fluorine recovery from smoke after phosphorus absorption by hydration in KPA, wherein the device comprises a first-stage and second-stage fluorine absorption tower, which are both fluidized counter-current washing towers. The device according to the present invention has simple structure, low investment cost, high raw material utilization rate, and good fluorine recovery effects.