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1. (WO2013154470) METHOD AND APPARATUS FOR PRODUCING FERTILIZER IN GRANULAR FORM

Pub. No.:    WO/2013/154470    International Application No.:    PCT/RU2013/000317
Publication Date: Fri Oct 18 01:59:59 CEST 2013 International Filing Date: Fri Apr 05 01:59:59 CEST 2013
IPC: C05C 7/02
Applicants: OTKRYTOE AKTSIONERNOE OBSCHESTVO RESEARCH & DESIGN INSTITUTE OF UREA AND ORGANIC SYNTHESIS PRODUCTS (OAO NIIK)
ОТКРЫТОЕ АКЦИОНЕРНОЕ ОБЩЕСТВО "НАУЧНО-ИССЛЕДОВАТЕЛЬСКИЙ И ПРОЕКТНЫЙ ИНСТИТУТ КАРБАМИДА И ПРОДУКТОВ ОРГАНИЧЕСКОГО СИНТЕЗА" (ОАО НИИК)
Inventors: BESEDIN, Aleksei Borisovich
БЕСЕДИН, Алексей Борисович
SHNEPP, Yury Borisovich
ШНЕПП, Юоий Борисович
BAKLAN, Georgy Sergeevich
БАКЛАН, Георгий Сергеевич
DUNAEVA, Olga Aleksandrovna
ДУНАЕВА, Ольга Александровна
RODIONOV, Aleksandr Sergeevich
РОДИОНОВ, Александр Сергеевич
KIZIMENKO, Valentina Leonidovna
КИЗИМЕНКО, Валентина Леонидовна
PROKOPYEV, Aleksandr Alekseevich
ПРОКОПЬЕВ, Александр Алексеевич
KUZNETSOV, Nikolai Mikhailovich
КУЗНЕЦОВ, Николай Михайлович
Title: METHOD AND APPARATUS FOR PRODUCING FERTILIZER IN GRANULAR FORM
Abstract:
The invention relates to methods and apparatuses for producing fertilizers in granular form, for example carbamide and ammonium nitrate. The fertilizer in granular form is produced by means of dispersing fertilizer melt in a volume of a granulating tower, where drops of melt formed are cooled and are hardened when coming into contact with the rising flow of air. The granules produced are cooled in a separate fluidized bed apparatus with a horizontal movement of granules. In the fluidized bed apparatus, separate removal of dust-filled air is performed from at least two zones of the apparatus, wherein the dust-filled cooling air from the first zone of the apparatus in the direction of passage of the granules is directed into a device for purifying the dust-filled air, and the dust-filled cooling air from the subsequent zones of the apparatus is directed into the granulating tower. The technical result consists in reducing the volume of dust-filled air arriving for purification from the fluidized bed apparatus and reducing the energy losses and costs involved in the purification of this air as a result.