Continuous envelope fluidized bed for sustained/controlled release fertilizer

• Main Authors: WANG RENZONG, XU ZUSHUN, WANG YINGZONG, CHEN WENQIU, LIU YU
• Format: Patent
• Language: Chinese; English
• Published: 26.12.2012
• Subjects: CHEMISTRY; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; MANUFACTURE THEREOF; METALLURGY; MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS

The utility model relates to a continuous envelope fluidized bed for a sustained/controlled release fertilizer, which is used for enveloping granulated fertilizers to prepare the sustained/controlled release fertilizer. The continuous envelope fluidized bed comprises a horizontal bed body which consists of a plurality of parallel fluidization chambers and a discharging bin, and is characterized in that each fluidization chamber is provided with an air inlet pipe, an air chamber, a suspension clapboard and an air outlet pipe which are independent of one another; except a feeding hole, the fluidization chamber is not provided with any air outlet pipe; the granulated fertilizers are preheated on a preheating section sequentially; a liquid envelope material is repeatedly and alternately sprayed on an envelope section; and the granulated fertilizers are discharged out of the discharging bin after being fully dried and solidified on a drying section. The continuous envelop fluidized bed can integrate a continuous f