Device and method for producing high-strength compound fertilizer by using of compound fertilizer return material

Abstract

The invention belongs to a device and a method for producing a high-strength compound fertilizer by using of a compound fertilizer return material; the device comprises a material return port of a compound fertilizer finished-product sieve, the material return port of the compound fertilizer finished-product sieve is connected with a bucket elevator by a belt weigher, a material outlet of the bucket elevator is connected with a material inlet of a pelletizer, the upper part of the material inlet of the pelletizer is provided with a compound fertilizer particle sprinkling device, a material outlet of the pelletizer is respectively connected with a packing scale by a sieve, the compound fertilizer particle sprinkling device comprises a stirring tank, a molten urea solution pipeline, an additive pipeline and a stirring motor are arranged at the top of the stirring tank, the stirring motor is connected with a stirring blade through a stirring main shaft inside the stirring tank, the outletof the stirring tank at the bottom of the stirring tank is connected with a nozzle on the upper part of the material inlet of the pelletizer by a urine pump and a pipe mixer, and the device has the advantages of less investment, simple structure, reasonable process design, reducing of return in the compound fertilizer production process and improving of the strength of the compound fertilizer without affecting the normal compound fertilizer production.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizer production, and in particular relates to a device and a method for producing high-strength compound fertilizer by using returned compound fertilizer. Background technique [0002] In the production of compound fertilizers, the return amount of finished compound fertilizer products is generally about 30%. This part of the returned products will cause high cost. At the same time, there are many powders or large balls in the product, the ball forming rate is low, and the output is not high. , or the phenomenon that the particles are not round and the strength is low, which makes the final product pulverized in the packaging bag, especially for high-nitrogen compound fertilizers. This situation is more serious. [0003] With the popularity of simultaneous sowing of fertilizers in recent years, the strength of compound fertilizers is also particularly important, because mechanical fertiliza...

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Problems solved by technology

[0002] In the production of compound fertilizers, the return amount of finished compound fertilizer products is generally about 30%. This part of the returned products will cause high cost. At the same time, there are many powders or large balls in the product, the ball forming rate is low, and the output is not high. , or the phenomenon that the particles are not round and the strength is low, which makes the final product pulverized in the packaging bag, especially for high-nitrogen compound fertilizers, this situation is more serious

[0003] With the popularity of simultaneous sowing of fertilizers in recent years, the strength of compound fertilizers is also particularly important, because mechanical fertilization uses the high-speed airflow generated by the blower to scatter the fertilizers, which inevitably makes the gap between the fertilizers or the walls of the fertilizer conveyor Collisions will cause some particles to be broken. If the particle strength is low, the product will be severely pulverized.

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