Cow dung organic fertilizer granulation production line process

Fermentation

Add organic solid solid waste (such as straw, sawdust, rice bran, bean cake, etc.) with a moisture content of less than 60% to the fresh cow dung as an auxiliary material and mix it with a microbial fermentation agent to adjust moisture, ventilation, and carbon. Nitrogen ratio effect (carbon to nitrogen ratio is between 30-40), so that the water content of cow dung is controlled at about 60%, which is subject to the watermark between the fingers but not dripping. It is fully decomposed, sterilized, deodorized, and dewatered by continuous aerobic fermentation in pool. The moisture content of the decomposed material is generally in the range of 30-35%, and it can be directly used for granulation to produce granular organic fertilizer or powdered organic fertilizer after screening.

The stacking work of each fermentation tank is completed by a fermentation stacker and a pool changer. Every day, the organic solid waste, plant straw and other auxiliary materials and fermentation bacteria are mixed according to the formula requirements. After being fully mixed by a forced mixer, they are evenly sent to the front end of each fermentation tank with a forklift (1/8 of the front end of the original empty tank or 1/8 of the front end of the pool vacated after turning the heap), turn the heap twice a day. The stacking thickness of the fermentation materials in the pool is 1.5-1.6 meters. The continuous aerobic fermentation is carried out by forced ventilation by high-pressure fans and the oxygen provided by the materials in contact with the air when the material is in contact with the air, so that the fermentation materials can be rapidly decomposed, sterilized, deodorized, dewatered and dried. , the fermentation cycle is 7-8 days. Every day, the fermented materials are transported away from the end of the fermentation tank (the processing capacity of one day, 1/8 of the length of the pond), and the space vacated at the front of the fermentation pond (the processing capacity of one day, 1/8 of the length of the pond) is replenished with new ones. Fermentation material, thus forming a continuous aerobic fermentation process. The fermentation and turning process has realized automatic intelligent control. The fermented material of the organic fertilizer production line is further decomposed and dewatered after aging, and then it is screened to obtain powdered finished organic fertilizer, or as a raw material fertilizer for granulation of granular organic fertilizer.

Ingredient crushing and mixing

The composted materials, inorganic fertilizers such as N, P, K and other raw materials such as additives and other additives are used in the batching bin to pass through a pulverizer and a mixer in a certain proportion for proportioning, pulverizing and mixing.

Granulation

The material is granulated by an organic fertilizer granulator.

Screening and return system

The particle size of the pellets output from the pelletizing and forming system has a certain difference, which needs to be sieved and classified. It is recommended to be equipped with an automatic feeding system to screen unqualified large and small particles, transport them out through a belt elevator, re-pulverize them and then send them to a granulator for continuous granulation, which helps to improve the continuous operation capacity of the production line.

Drying

Use the organic fertilizer dryer to further remove the moisture from the sieved particles to meet the standard requirements of the moisture content of organic fertilizers.

Cool down

Use a cooler to cool the granular material, which is helpful for particle storage and quality. The hot granular material output by the dryer enters the counter-flow cooler from above, and the drying air enters from the lower part of the cooler under the action of the cooling fan, and is separated from the cooler. The moist and hot particles falling from the upper part conduct sufficient cold and heat exchange. After cooling, the difference between the particle temperature and the ambient temperature is less than 5°C.

Package

The cooled granular material is transported into the finished product warehouse through the bucket elevator. Granular materials are quantitatively weighed and packaged through automatic packaging scales.

Mainly including compound fertilizer production equipment, organic fertilizer production line equipment, double-roll press granulat