Process and equipment for manufacturing polymer enveloped control-released fertilizer
A technology of controlled-release fertilizers and polymers, applied in the form of fertilizers, urea compound fertilizers, fertilizer mixtures, etc., can solve problems such as limited application, limited development, technological methods and equipment inventions, and achieve strong controllability and operability of equipment The effect of wide range and high control precision
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[0033] The invention provides a process and equipment for manufacturing polymer-coated controlled-release fertilizer. The spray precipitation phase inversion method coating process flow chart shown in Figure 1. The process combines the fluidized bed spray pyrolysis method with the solvent evaporation precipitation phase conversion method, and establishes a spray precipitation phase conversion method based on the spray fluidized bed preparation of fertilizer controlled release film. This method first makes the material particles in a stable circulating fluidized state, and then uses a two-fluid nozzle to spray the film-making liquid such as organic polymer on the surface of the moving particles, and hot air is used to promote the film-making liquid that settles on the surface of the particles. The solvent and the solute are separated into phases, the solvent changes from a liquid phase to a gas phase to volatilize, and the solute changes from a highly dispersed liquid phase to a so...
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