The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2024
Filed:
Feb. 08, 2021
Toyo Engineering Corporation, Tokyo, JP;
Keishi Sano, Narashino, JP;
Genshi Nishikawa, Narashino, JP;
Kimihito Haruta, Narashino, JP;
Katsunori Yagoh, Narashino, JP;
Masashi Takahashi, Narashino, JP;
Yuichiro Wakashima, Narashino, JP;
Keiji Mase, Tokyo, JP;
Shozo Ishibashi, Tokyo, JP;
Tetsuya Kawabe, Tokyo, JP;
TOYO ENGINEERING CORPORATION, Tokyo, JP;
Abstract
A fluidized bed or fluidized bed/spouted bed granulator into which urea seed particles, an aqueous urea solution and air are introduced to produce urea particles with an average particle size of 1 mm or more. The granulator includes a box-shaped granulation chamber with a bottom floor, a top and side surfaces. Inner wall surfaces of the chamber are of a metal plate material, an upper part of the side or top surfaces includes an exhaust outlet, the side surfaces or top surface includes an inlet for introducing the seed particles, the side surfaces include a collection port for the particles, the aqueous urea solution is introduced from the bottom floor or the side surfaces, the air is introduced from the bottom floor or the bottom floor and the side surfaces, and at least a portion of the inner wall surfaces of the granulation chamber is treated by surface roughening.