Fertilizer production equipment makes organic fertilizer from agricultural wastes such as chicken manure, pig manure, cattle manure and straw, which solves the environmental pollution problem and satisfies the nutrients needed by crops. Organic fertilizer granulation equipment, chicken manure and other high-humidity materials fermentation drying equipment for organic, inorganic biological fertilizer plants and dregs, sewage disposal plants for harmless treatment. The complete set of fertilizer production equipment has the characteristics of compact structure, small area and reliable operation of granulator.
1. Granulating process and equipment characteristics of organic fertilizer equipment
Granulator plays an important role in fertilizer production equipment. Because after a whole fertilizer production line is put into production, the finished product rate affects the production cost, and the main factor determining the finished product rate is the granulation link.
Conventional granular fertilizer production methods: The conventional granular fertilizer production methods are divided into extrusion method and agglomeration method. Extrusion granulation uses ring die mode, flat die mode and double roller extrusion mode. In the process of granulation, ring mode and formwork are worn seriously, their service life is short, equipment maintenance cost is high, and power consumption is large. Moreover, the extruded particles are cylindrical or flaky, and their fluidity is poor, so they are not suitable for mechanized fertilization. However, the raw materials for extrusion granulation have low moisture content, high extrusion density and high fertilizer intensity. Drying and cooling treatment can be omitted in production process, and a part of consumption can be saved. It is suitable for small-yield fertilizer production. In granulating process, disc granulator and drum granulator are commonly used. Dry organic raw materials and fertilizers are crushed into fine powder. Then, disc granulator or drum granulator is used to roll the material into granules. Water is added to the granulating process to agglomerate the powder into pellets.
Picture of organic fertilizer production line
2. Processing organic fertilizer by fertilizer equipment
Fertilizer production equipment is also used for the early treatment of organic fertilizers. Firstly, organic raw materials such as feces are fermented, during which fermentation period can be shortened by adding fermentation strains. If the moisture content of the material is large, the dehydrator can be used to reduce the moisture content first, or the dry straw powder can be added to reduce the moisture content to the optimum range of fermentation requirements. The material is dumped by the dumper to increase the contact between the material and the air, so as to ensure sufficient oxygen during aerobic fermentation of organic fertilizer, so that livestock and poultry manure can be completely decomposed in about two weeks. Then the pretreated raw materials can be put into the equipment of organic fertilizer granulator such as disc granulator for production. The tilted disc rotates continuously, and the powder material gradually rolls into granules. Because of the high moisture content of the granular fertilizer produced, dryer, cooler and other organic fertilizer equipment are needed to reduce the moisture content of granules, so as to prevent the agglomeration caused by stacking after packaging into storage.
In order to improve the productivity of the dryer, the larger diameter and length of the dryer are usually chosen to increase the effective volume of the drum and prolong the drying time of the material. Dryers of different specifications must be equipped with matching oil (coal) fired furnaces and induced draft fans with corresponding air volume. If the fertilizer contains microbial active bacteria, the hot air temperature in the drum dryer should not be too high. Predicting the optimum temperature of hot air and the retention time of materials in the drum dryer can improve drying efficiency and reduce equipment investment.
Strengthening the recycling of wastes to make fertilizers and then reduce them to the production of crops can greatly save cost and investment, improve agricultural waste, and is a virtuous cycle of land nourishment. The development of commercial organic fertilizer is the trend of organic fertilizer application.