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公开(公告)号：US20200157034A1
公开(公告)日：2020-05-21
申请号：US16347170
申请日：2017-05-15
发明人： Xu ZHAO , Zhongxin SUN , Wanyao ZHANG , Tianbao WANG , Xiangnan ZHAI , Yongpeng TAN , Guohai ZHANG , Yu GUO , Xiaoling XIE
摘要： The present invention relates to a method for processing acetic acid solvent in Crude Terephthalic Acid (CTA) in an oxidized unit of a pure terephthalic acid (PTA) industrial apparatus. In the present invention, a filter cake in CTA is washed by means of a two-stage-three-step method. The present invention further shortens the production process of solvent exchanging technique of CTA pressure filters, improves production capacity of a device, reduces investment of the device, reduces energy consumption of a system, and solves the shortcomings of the existing CTA solvent exchanging technique of the pressure filters.
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公开(公告)号：US20200164291A1
公开(公告)日：2020-05-28
申请号：US16330702
申请日：2017-07-24
发明人： Xu ZHAO , Zhongxin SUN , Wanyao ZHANG , Xiangnan ZHAI , Guohai ZHANG , Yu GUO , Xiaopeng FENG
IPC分类号： B01D33/80 , B01D33/067 , B01D33/72
摘要： A device for reducing pressure fluctuation of a pressure filter frame and a pressure filter. The device includes a pressure filter frame that is a cylindrical housing. An inner wall of the pressure filter frame is further provided with a buffer plate. A plurality of openings are provided in the buffer plate. A gap is remained between the buffer plate and the inner wall of the pressure filter frame. A plurality of supporting posts are disposed in the gap, which fixedly connect the inner wall of the pressure filter frame with the buffer plate.
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公开(公告)号：US20170183285A1
公开(公告)日：2017-06-29
申请号：US15305034
申请日：2015-01-09
发明人： Xu ZHAO , Wanyao ZHANG , Zhongxin SUN , Yongpeng TAN , Xiangnan ZHAI , Tianbao WANG , Yuanyue LIANG , Guohai ZHANG , Xiaopeng FENG , Yanshun SHEN
摘要： A solvent exchanger and a method is provided for: pressurizing a CTA slurry into a solvent exchanger for separation and obtaining a mother liquor, a bias flow mother liquor and a suspended matter A; washing the suspended matter A to obtain a primary filtrate, a bias flow primary filtrate and a suspended matter B; washing the suspended matter B to obtain a secondary filtrate, a bias flow secondary filtrate and a suspended matter C; washing the suspended matter C to obtain a tertiary filtrate, a bias flow tertiary filtrate and a suspended matter D; washing the suspended matter D to obtain a fourth filtrate, a bias flow fourth filtrate and a suspended matter E; washing the suspended matter E to obtain a fifth filtrate, a bias flow fifth filtrate and a filter cake; and after finished, back-flushing the filter cake and then pulping to obtain a slurry, and discharging.
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