Patents by Inventor Yazhen Shen

Yazhen Shen 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).

  • Method for preparing controlled release fertilizer with water-based coating on the basis of closed circulating fluidized bed, and device therefor
    Patent number: 9561988
    Abstract: Disclosed is a method for making a controlled release fertilizer with water-based coating using a closed large numerically controlled fluidized bed and a device therefor: collecting a granular fertilizer with a suitable granule size into a barrel; sucking the same into a coating cavity by negative pressure and making the same fluid; directing a water-based coating liquid into a spray gun, then spraying the liquid onto the surface of the fertilizer granules after nebulization; collecting the impurities in the air discharged from the coating cavity by means of a cyclone separator; dehumidifying the air discharged from the cyclone separator by means of a fluidized drying tower; and then the coating is completed.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: February 7, 2017
    Assignee: NANJING INSTITUTE OF SOIL CHINESE ACADEMY OF SCIENCES
    Inventors: Changwen Du, Yazhen Shen, Jianmin Zhou
  • Method for Preparing Controlled Release Fertilizer with Water-Based Coating on the Basis of Closed Circulating Fluidized Bed, and Device therefor
    Publication number: 20150210603
    Abstract: Disclosed is a method for making a controlled release fertilizer with water-based coating using a closed large numerically controlled fluidized bed and a device therefor: collecting a granular fertilizer with a suitable granule size into a barrel; sucking the same into a coating cavity by negative pressure and making the same fluid; directing a water-based coating liquid into a spray gun, then spraying the liquid onto the surface of the fertilizer granules after nebulization; collecting the impurities in the air discharged from the coating cavity by means of a cyclone separator; dehumidifying the air discharged from the cyclone separator by means of a fluidized drying tower; and then the coating is completed.
    Type: Application
    Filed: April 23, 2012
    Publication date: July 30, 2015
    Applicant: NANJING INSTITUTE OF SOIL CHINESE ACADEMY OF SCIENCES
    Inventors: Changwen Du, Yazhen Shen, Jianmin Zhou