Organic and NPK fertilizer making machines

Granulation Process of Organic Fertilizer

First, fermentation

To put it simply, collect the cow dung and cow urine, add the hay and the decaying silage to make the compost and ferment it. In the fermentation process, the cow manure is fully fermented by using a compost turner. Only timely and even turnover can do this. Otherwise, some places are very dry, and some places are very wet, which will affect the quality and effect of fermentation.

Fermentation method:

  1. Diluted strain

Add corn flour or gluten or wheat bran in a ratio of 1:10 to mix the organic fertilizer starter with corn flour (or gluten, rice husk, wheat bran, etc.).


  1.  Add accessories

In the fresh cow dung, 10%-15% of the total amount of fermented cow manure is added, such as straw and rice bran, to adjust the moisture, aeration and carbon-nitrogen ratio. The ratio of carbon to nitrogen is between 30-40, so that the content of cow dung is included. The water quantity is controlled at about 60%, with a watermark between the fingers but not dripping.


  1. Inoculation powder

Stir the mixed bacteria powder and the water-adjusted material thoroughly. This step must be fine to facilitate better fermentation of the material.


4. Pile heap

The material is piled up to 80~120cm high and 1.5m wide (the pile height is high and the width is arbitrary, in order to facilitate the turning over. The larger the pile, the more heat accumulates, the faster the temperature rises.) The length is flexible according to the material and can be designed on your requirement.


  1. Turn over the pile

According to the local temperature, the general material will increase by about 5~10 degrees per day. When the temperature reaches 60 degrees, turn it over. After the large piece is broken, adjust the part of the water to 50~60% and rebuild. After three or four days, it will rise to 50 degrees or more again, and then turn over again. After three or four days, the temperature will reach 60 degrees and then stand still. When the temperature drops to the ambient temperature, the pile will be fermented after being piled up, generally turning over three times. It took about 15 days to complete the decomposing and the organic fertilizer was successfully fermented.


Second, the ingredients are crushed and mixed

The material used in the composting and the inorganic fertilizers such as N, P, K and other additives and other additives are used in a certain proportion through a material pulverizer and a horizontal mixer to pulverize, mix and mix. The function of this system is to pulverize, mix and mix various materials such as composted materials and NPK inorganic fertilizers and other additives in a certain proportion. According to many years of experience, the equipment supporting suggestions are as follows: the vertical crusher is used to crush the cow manure compost, which is not easy to stick to the wall, is not easy to block, and the multi-layer turbulent chain hammer structure improves the crushing performance; the continuous automatic batching system is suitable for the dynamic measurement of organic fertilizer raw materials. And batching control; the mixing operation is equipped with a two-shaft continuous mixer, which has good sealing performance, and the wet and dry materials are not easy to adhere at the root of the stirring shaft.


Third, granulation

The material is granulated using a new organic fertilizer granulator. The function of the system is to make the granulated ingredients into a granule. The granulation is suitable for flat die granulator, which has the advantages of wide adaptability of raw materials, especially suitable for organic materials, wide requirements for raw material density and raw material moisture, no need for drying of raw materials; large diameter of press rolls, and templates can be used for both sides The material is evenly distributed in the compression chamber, the granulation is stable, the pellet forming rate is high, the appearance of the finished granules is uniform and not easy to be broken; the whole granulation molding process does not add water, and the cost of subsequent granule drying is saved; the fineness of raw material pulverization is not high. Granular raw materials (after composting) generally do not need to be finely pulverized, and small stones can be directly crushed, which is not easy to block the die hole.


Fourth, screening and returning system

The pellets output from the granulation molding system have a certain difference in particle size and require sieving and grading. The rotary sifter selected requires low vibration, low noise, convenient screen change, and is equipped with a screen cleaning device. It is recommended to equip the automatic feeding system to screen out unqualified large and small granular materials, which are transported out through the belt hoist, re-pulverized and sent to the granulator for further granulation, which helps to improve the continuous operation capacity of the production line.


Fifth, the last step

1, drying

The organic fertilizer dryer is used to further remove the granules after sieving to meet the standard requirements for the moisture content of the organic fertilizer.


2, cooling

The cooling of the granular material by the cooling machine helps the hot-slurry material output from the granule storage and quality-preserving dryer to enter the counter-current cooler from above, and the dry air enters the lower part of the cooler under the action of the cooling fan. The hot and humid particles under the upper tribe are subjected to sufficient heat exchange. After cooling, the difference between the particle temperature and the ambient temperature is less than 5 °C.


3, packaging

The cooled particulate material is transported through the bucket elevator into the finished product bin. Granular materials are quantitatively weighed and packaged by automatic packing.



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