Patents by Inventor Xiangnan ZHAI
Xiangnan ZHAI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240050873Abstract: A system and method for improving the water quality of a dehydration tower in a purified terephthalic acid device includes a dehydration washing device, a tail gas condensation device communicating with the top of the dehydration washing device, and a water separation device communicating with the tail gas condensation device. The system reduces energy consumption. The tail gas condensation device uses low-pressure vapor of about 0.05 MPa generated by an Nm-th-stage condenser as a heating medium. Working media are water and the low-pressure vapor, and no organic phase is involved in a process, and a reaction is stable and intrinsically safe. The water in the water separation tower is purified water and concentrated water, the purified water is returned to the top of the dehydration tower, and the concentrated water is mixed with a mother liquor and then enters the dehydration tower.Type: ApplicationFiled: May 16, 2022Publication date: February 15, 2024Inventors: Xu ZHAO, Yongpeng TAN, Yan GAO, Kaixuan MA, Yipeng ZHANG, Yuanrui LU, Xiangnan ZHAI, Tao ZHOU, Xiaoling XIE
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Publication number: 20230398466Abstract: Provided are a separation tower and method for treating condensed water. In order to overcome the defects that an apparatus has high investment and energy consumption and requires high safety due to the need to use an organic phase as an extractant, the present disclosure provides a separation tower for treating condensed water. The water separation tower includes a tower body. Evaporation units for purifying the condensed water are disposed in the tower body. A final-effect condensation unit is disposed below the evaporation units and connected with a vacuum pump.Type: ApplicationFiled: May 16, 2022Publication date: December 14, 2023Inventors: Xu ZHAO, Tao ZHOU, Yuanrui LU, Xiangnan ZHAI, Yongpeng TAN, Yan GAO, Yipeng ZHANG, Kaixuan MA, Xiaoling XIE
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Patent number: 11202979Abstract: 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.Type: GrantFiled: July 24, 2017Date of Patent: December 21, 2021Assignee: TIANHUA INSTITUTE OF CHEMICAL MACHINERY AND AUTOMATION CO., LTDInventors: Xu Zhao, Zhongxin Sun, Wanyao Zhang, Xiangnan Zhai, Guohai Zhang, Yu Guo, Xiaopeng Feng
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Patent number: 11099114Abstract: A testing device, a testing method, and a design method for a rotary pressure filter. The device includes a stabilizer tank; a buffer tank connected to the stabilizer tank; a filter frame disposed beneath the buffer tank, and connected to the buffer tank; a liquid receiving tank disposed beneath the filter frame; an electronic balance disposed at bottom of the liquid receiving tank; and a seconds counter. The testing method includes adding a certain calculated amount of testing slurry into the filter frame, introducing a gas with a certain pressure into the stabilizer tank, filling the filter frame through the buffer tank, opening a valve at bottom of the filter frame, measuring a mass of the expelled filtrate expelled from the filter frame, measuring time of the filtering process, sampling and analyzing the filter cake and the expelled filtrate according to actual needs; and perform cleaning and drying processes sequentially.Type: GrantFiled: May 15, 2017Date of Patent: August 24, 2021Assignee: TIANHUA INSTITUTE OF CHEMICAL MACHINERY AND AUTOMATION CO., LTDInventors: Xu Zhao, Wanyao Zhang, Yongpeng Tan, Tianbao Wang, Xiangnan Zhai, Yanshun Shen, Guohai Zhang, Yu Guo, Xiaopeng Feng, Yuanyue Liang, Xiaoling Xie
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Patent number: 10906858Abstract: 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.Type: GrantFiled: May 15, 2017Date of Patent: February 2, 2021Assignee: Tianhua Institute of Chemical Machinery and Automation Co., LtdInventors: Xu Zhao, Zhongxin Sun, Wanyao Zhang, Tianbao Wang, Xiangnan Zhai, Yongpeng Tan, Guohai Zhang, Yu Guo, Xiaoling Xie
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Publication number: 20200164291Abstract: 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.Type: ApplicationFiled: July 24, 2017Publication date: May 28, 2020Inventors: Xu ZHAO, Zhongxin SUN, Wanyao ZHANG, Xiangnan ZHAI, Guohai ZHANG, Yu GUO, Xiaopeng FENG
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Publication number: 20200157034Abstract: 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.Type: ApplicationFiled: May 15, 2017Publication date: May 21, 2020Inventors: Xu ZHAO, Zhongxin SUN, Wanyao ZHANG, Tianbao WANG, Xiangnan ZHAI, Yongpeng TAN, Guohai ZHANG, Yu GUO, Xiaoling XIE
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Publication number: 20190301991Abstract: The present invention relates to a rotary pressure filter testing apparatus, a testing method and a design method thereof. The apparatus comprises a stabilizer tank; a buffer tank connected to the stabilizer tank; a filter frame disposed beneath the buffer tank, and connected to the buffer tank; a liquid receiving tank disposed beneath the filter frame; an electronic balance disposed at bottom of the liquid receiving tank; and a seconds counter. The testing method is to add a certain amount of calculated testing tank into the filter frame, then introduce a gas with a certain pressure into the stabilizer tank, fill the filter frame through the buffer tank, then open a valve at bottom of the filter frame, measure a mass of discharged mother liquid in the filter frame, measure time of the filtering process, and sample and analyze the filtered filter cake and the mother liquid according to actual needs; subsequently, perform cleaning and drying processes sequentially according to such method.Type: ApplicationFiled: May 15, 2017Publication date: October 3, 2019Inventors: Xu ZHAO, Wanyao ZHANG, Yongpeng TAN, Tianbao WANG, Xiangnan ZHAI, Yanshun SHEN, Guohai ZHANG, Yu GUO, Xiaopeng FENG, Yuanyue LIANG, Xiaoling XIE
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Patent number: 10273198Abstract: 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.Type: GrantFiled: January 9, 2015Date of Patent: April 30, 2019Assignee: TIANHUA INSTITUTE OF CHEMICAL MACHINERY AND AUTOMATION CO., LTDInventors: Xu Zhao, Wanyao Zhang, Zhongxin Sun, Yongpeng Tan, Xiangnan Zhai, Tianbao Wang, Yuanyue Liang, Guohai Zhang, Xiaopeng Feng, Yanshun Shen
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Patent number: 9902680Abstract: The present invention relates to a method for processing acetic acid solvent in an oxidizing unit of a PTA industrial apparatus; said method uses a pressure filter machine to filter crude terephthalic acid slurry, and then, using a multi-stage counter-current method, uses washing water to wash the acetic acid solvent, and, by means of setting up a bias-current and drainage, prevents residual liquid in the filtrate pipe from entering the next area following the rotation of the pressure filter machine, improving washing efficiency and reducing the amount of washing water; the present invention integrates the processes of filtering and washing crude terephthalic acid into a single pressure filter machine, such that the process is shorter, the occupied floor space is reduced, and energy consumption is lower. A method feeding nitrogen gas into the mother liquor tank and washing liquid tank is used to regulate the pressure balance of the system.Type: GrantFiled: February 11, 2015Date of Patent: February 27, 2018Assignee: TIANHUA INSTITUTE OF CHEMICAL MACHINERY AND AUTOMATION CO., LTDInventors: Xu Zhao, Wanyao Zhang, Zhongxin Sun, Maikui Zhang, Yongpeng Tan, Xiangnan Zhai, Tianbao Wang, Tao Shen, Rui Wang, Yuanyue Liang, Xiaopeng Feng, Guohai Zhang
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Publication number: 20170183285Abstract: 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.Type: ApplicationFiled: January 9, 2015Publication date: June 29, 2017Inventors: Xu ZHAO, Wanyao ZHANG, Zhongxin SUN, Yongpeng TAN, Xiangnan ZHAI, Tianbao WANG, Yuanyue LIANG, Guohai ZHANG, Xiaopeng FENG, Yanshun SHEN
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Publication number: 20170081269Abstract: The present invention relates to a method for processing acetic acid solvent in an oxidising unit of a PTA industrial apparatus; said method uses a pressure filter machine to filter crude terephthalic acid slurry, and then, using a multi-stage counter-current method, uses washing water to wash the acetic acid solvent, and, by means of setting up a bias-current and drainage, prevents residual liquid in the filtrate pipe from entering the next area following the rotation of the pressure filter machine, improving washing efficiency and reducing the amount of washing water; the present invention integrates the processes of filtering and washing crude terephthalic acid into a single pressure filter machine, such that the process is shorter, the occupied floor space is reduced, and energy consumption is lower. A method feeding nitrogen gas into the mother liquor tank and washing liquid tank is used to regulate the pressure balance of the system.Type: ApplicationFiled: February 11, 2015Publication date: March 23, 2017Inventors: Xu ZHAO, Wanyao ZHANG, Zhongxin SUN, Maikui ZHANG, Yongpeng TAN, Xiangnan ZHAI, Tianbao WANG, Tao SHEN, Rui WANG, Yuanyue LIANG, Xiaopeng FENG, Guohai ZHANG
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Patent number: 9352972Abstract: A device for recovering SiCl4 slurry and method for the same, comprising a paddle dryer for receiving SiCl4 slurry containing chlorosilane; a first spray scrubber for receiving exhaust gas from the paddle dryer; a condenser for condensing and recovering the purifying exhaust gas from the first spray scrubber and discharging supersaturated vapor that after condensation and separation; a defogging separator for removing liquid droplets from supersaturated vapor which is cooled by the condenser; a hydrolysis tank for receiving and hydrolyzing a paste-like slurry from the paddle dryer and vapor from the defogging separator to produce mixture and exhaust gas; a drum pressure filter for receiving neutralization products from a neutralization stirring tank.Type: GrantFiled: May 15, 2013Date of Patent: May 31, 2016Assignees: National Engineering Research Center of Drying Technology and Equipment, Tianhua Institute of Chemical Machinery and Automation Co., LtdInventors: Xu Zhao, Hui Guo, Wanyao Zahng, Rui Wang, Xiangnan Zhai
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Publication number: 20140099250Abstract: A device for recovering SiCl4 slurry and method for the same, comprising a paddle dryer for receiving SiCl4 slurry containing chlorosilane; a first spray scrubber for receiving exhaust gas from the paddle dryer; a condenser for condensing and recovering the purifying exhaust gas from the first spray scrubber and discharging supersaturated vapor that after condensation and separation; a defogging separator for removing liquid droplets from supersaturated vapor which is cooled by the condenser; a hydrolysis tank for receiving and hydrolyzing a paste-like slurry from the paddle dryer and vapor from the defogging separator to produce mixture and exhaust gas; a drum pressure filter for receiving neutralization products from a neutralization stirring tank.Type: ApplicationFiled: May 15, 2013Publication date: April 10, 2014Applicants: National Engineering Research Center of Drying Technology and Equipment, Tianhua Institute of Chemical Machinery and Automation Co., ltdInventors: Xu ZHAO, Hui GUO, Wanyao ZAHNG, Rui WANG, Xiangnan ZHAI