Bio organic fertilizer production equipment caking: fertilizer caking is formed by the contact point of particles (particles, pellets, tablets, etc.). The most serious fertilizer agglomeration is caused by the crystal connection (called crystal bridge) formed by the contact between fertilizer particles. Generally, crystal bridge of organic fertilizer production equipment is formed by chemical reaction in the storage process, and it is difficult to recover once it is formed. In addition, agglomeration can also be formed by adhesion contact (capillary adhesion), which is generally physical and easy to recover. The high moisture content in the fertilizer can also cause the formation of a liquid film of saturated solution between the fertilizer particles. The fertilizer "sticky" is also difficult to handle, which directly affects the mobility of the fertilizer particles, especially not conducive to mechanical fertilization operations. Therefore, it must be avoided. The measures to prevent caking of fertilizer produced by organic fertilizer production equipment mainly include the following.

Measures to prevent organic fertilizer from caking in biological organic fertilizer production equipment

(1) Control the particle size of fertilizer: generally, the larger the fertilizer particles are, the less the contact area between fertilizer particles is, and the smaller the ability to generate chemical reactions and absorb moisture in the air is, the less likely it is to agglomerate.

(2) Control the water content of basic fertilizer. High water content in fertilizer is one of the main reasons for forming fertilizer stickiness. Generally speaking, the minimum water content of each component is required to be different due to different basic fertilizers.

Formulated fertilizer containing ammonium nitrate and urea, N: P20, ≥ 1.0% nitrogen and phosphorus, with water content of 0.5%~1.0%.

Nitrogen and phosphorus fertilizer containing ammonium nitrate and urea, N: P203<1.0, with water content of 1.0%~1.5%.

Nitrogen phosphorus fertilizer without ammonium nitrate and urea, N: P203<1.0, water content 1.5%~2.0%.

For formula fertilizer without nitrogen fertilizer or with little nitrogen fertilizer, the water content can be>2.5%.

(3) Use a regulator (anti caking agent). At present, diatomite, kaolin, clay and talcum powder are commonly used as conditioners. They are attached to the surface of fertilizer particles to prevent crystal connection between particles,

Therefore, it can prevent caking, so it is also called anti caking agent. Generally, the amount of anti caking agent is 1-4% of the amount of fertilizer. Diatomite is the best solid conditioner for ammonium nitrate and ammonium nitrate containing fertilizer. Neutralize the free acid in calcium superphosphate with calcium magnesium phosphate fertilizer, coat ammonium nitrate, reduce the contact area between ammonium nitrate and calcium superphosphate, effectively solve the problem of fertilizer caking caused by ammonium nitrate deliquescence in humid air, and produce a special fertilizer for tobacco and grass with a total nutrient content of 37%, N: P2O, and K20 of 1:1:1.7.