US 12,466,753 B2
Fluidized bed separation method and device for methanol-to-olefins quenched water
Hualin Wang, Shanghai (CN); Wenjie Lv, Shanghai (CN); Jiangi Chen, Shanghai (CN); Yu Liu, Guangdong (CN); Lei Shi, Guangdong (CN); Ligong Qiao, Guangdong (CN); Jie Zhang, Guangdong (CN); Guoping Chang, Guangdong (CN); Zhihong Dang, Shanghai (CN); Yujie Ji, Shanghai (CN); Hongpeng Ma, Shanghai (CN); Xin Cui, Shanghai (CN); Weichi Sang, Shanghai (CN); and Jinsong Wang, Shanghai (CN)
Assigned to EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY, Shanghai (CN); SHANGHAI HUACHANG ENVIRONMENTAL PROTECTION CO., LTD., Shanghai (CN); and SINOPEC GUANGZHOU ENGINEERING CO., LTD., Guangdong (CN)
Appl. No. 18/245,575
Filed by EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY, Shanghai (CN); SHANGHAI HUACHANG ENVIRONMENTAL PROTECTION CO., LTD, Shanghai (CN); and SINOPEC GUANGZHOU ENGINEERING CO., LTD., Guangdong (CN)
PCT Filed Sep. 17, 2020, PCT No. PCT/CN2020/115849
§ 371(c)(1), (2) Date Mar. 16, 2023,
PCT Pub. No. WO2022/056776, PCT Pub. Date Mar. 24, 2022.
Prior Publication US 2023/0365449 A1, Nov. 16, 2023
Int. Cl. C02F 9/00 (2023.01); B01D 47/00 (2006.01); C02F 1/28 (2023.01); C02F 1/38 (2023.01); C02F 11/12 (2019.01); C02F 11/122 (2019.01); C02F 103/18 (2006.01)
CPC C02F 9/00 (2013.01) [B01D 47/00 (2013.01); C02F 1/28 (2013.01); C02F 1/38 (2013.01); C02F 11/122 (2013.01); C02F 2103/18 (2013.01); C02F 2303/10 (2013.01); C02F 2303/16 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A fluidized bed based separation method for methanol-to-olefins quench water, comprising the following steps:
(a) subjecting quench water from a quench tower to liquid-solid separation by a microcyclone separator to remove large particles of catalyst entrained in the quench water;
(b) subjecting supernate from the microcyclone separator to secondary separation by a fluidized bed separator to remove residual particles in the quench water which is then sent to an olefin separation device as a low-temperature heat source to recover part of residual heat of the quench water, and then returned to the quench tower after heat exchange;
(c) after a period of time of continuous operation of the fluidized bed separator, regenerating a separating medium in the fluidized bed separator by back-feeding purified water from a stripping tower or the quench water to release catalyst particles adsorbed by the separating medium, wherein the stripping tower is communicated with the fluidized bed separator; and
(d) sending concentrated catalyst slurries from the microcyclone separator and the fluidized bed separator to a pressure filtration unit for dewatering by pressure filtration to recover the catalyst.