Thermoplastic resin membrane wrapping control-releasing fertilizer and production method thereof
A technology of thermoplastic resin and coated controlled-release fertilizer, which is applied in the form of fertilizer, fertilization device, fertilizer mixture, etc., can solve the problems of scientific fertilization technology, low education level, too much time and energy, etc., and achieve a significant increase in production and synergistic effect, wide application prospect, excellent quality and effect effect
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Embodiment 1
[0038] Embodiment 1: take turpentine as solvent, produce coated urea with polyethylene. Proceed as follows:
[0039] 1) 4500kg turpentine is added to the dissolving kettle;
[0040] 2) Add 300kg of polyethylene, 50kg of sodium dodecylbenzenesulfonate and 25kg of paraffin into the dissolution kettle, stir and dissolve at 110°C to make a coating solution;
[0041] 3) Feed nitrogen into the fluidized bed, add 3000kg granular fertilizer urea to make it in a fluidized state and preheat to 40°C;
[0042] 4) Pressurize the coating solution to 0.5MPa, spray it on the surface of the fertilizer particles through the nozzle in the fluidized bed, the organic solvent evaporates rapidly, and the thermoplastic resin remains on the surface of the particles to form a smooth and dense film, and the finished thermoplastic coated urea is obtained.
[0043]The gas containing turpentine can be recycled after being condensed and recovered.
Embodiment 2
[0044] Example 2: Using tetrachlorethylene as a solvent to produce coated compound fertilizer with a mixture of polyethylene and polystyrene.
[0045] 1) 2500kg tetrachlorethylene is added to the dissolution kettle;
[0046] 2) Add 100kg of polyethylene and polystyrene mixture (70kg of polyethylene and 30kg of polystyrene), 20kg of sodium dodecylbenzenesulfonate and 10kg of paraffin into the dissolution kettle, stir and dissolve at 125°C to make a coating solution;
[0047] 3) Pass air into the fluidized bed, add 2500kg granular fertilizer compound fertilizer to make it in a fluidized state and preheat to 50°C;
[0048] 4) Pressurize the coating solution to 1.5MPa, spray it on the surface of the fertilizer particles through the nozzle in the fluidized bed, the organic solvent will evaporate quickly, and the thermoplastic resin will remain on the surface of the particles to form a smooth and dense film, and the finished thermoplastic coating compound is obtained Fat.
Embodiment 3
[0049] Embodiment 3: take the mixture of turpentine and tetrachlorethylene as solvent, produce coated ammonium sulfate with polyethylene. Proceed as follows:
[0050] 1) the mixture of 4500kg turpentine and perchlorethylene is added to the dissolution kettle;
[0051] 2) Add 265kg of polyethylene, 102kg of sodium dodecylbenzenesulfonate and 33kg of paraffin into the dissolution kettle, stir and dissolve at 115°C to make a coating solution;
[0052] 3) Air is introduced into the fluidized bed, and 5300kg of granular fertilizer ammonium sulfate is added to make it in a fluidized state and preheated to 45°C;
[0053] 4) Pressurize the coating solution to 1.0MPa, spray it on the surface of the fertilizer particles through the nozzle in the fluidized bed, the organic solvent evaporates rapidly, and the thermoplastic resin remains on the surface of the particles to form a smooth and dense film, and the finished thermoplastic coated ammonium sulfate is obtained .
[0054] The gas ...
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