Patents by Inventor Qiaoyun ZHANG

Qiaoyun ZHANG 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).

  • System for treating reverse-osmosis concentrated water with permanent hardness
    Patent number: 11046593
    Abstract: The invention relates to sewage treatment, and more particularly to a system for treating reverse-osmosis concentrated water with permanent hardness. The system includes a first crystallization unit, a first reverse osmosis unit, a second crystallization unit, a lime softening unit and a second reverse osmosis unit, which are connected in sequence. The system of the invention is able to eliminate the permanent hardness and the temporary hardness of the concentrated brine, and the hardness can be reduced to equal to or less than 50 mg/L.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: June 29, 2021
    Assignee: Greentech Environment Co., Ltd.
    Inventors: Zehua Li, Mu Liu, Qiaoyun Zhang, Huiming Han, Yuan Liu, Yingqiang Su, Hexing Zhang
  • SYSTEM FOR TREATING REVERSE-OSMOSIS CONCENTRATED WATER WITH PERMANENT HARDNESS
    Publication number: 20200189937
    Abstract: The invention relates to sewage treatment, and more particularly to a system for treating reverse-osmosis concentrated water with permanent hardness. The system includes a first crystallization unit, a first reverse osmosis unit, a second crystallization unit, a lime softening unit and a second reverse osmosis unit, which are connected in sequence. The system of the invention is able to eliminate the permanent hardness and the temporary hardness of the concentrated brine, and the hardness can be reduced to equal to or less than 50 mg/L.
    Type: Application
    Filed: October 22, 2019
    Publication date: June 18, 2020
    Inventors: Zehua LI, Qiaoyun ZHANG, Huiming HAN, Yuan LIU, Yingqiang SU, Hexing ZHANG