Design of complete set of equipment for cattle manure organic fertilizer production line
Raw materials for organic fertilizer production generally refer to fermentable organic organic solid wastes, such as animal manure, domestic waste, sludge straw, industrial waste fly ash, etc. The raw materials enter the fermentation site for aerobic fermentation. The aerobic fermentation process depends on the scale of production. Small-scale (1-3 million tons/year) composting yard uses flat-ground piles and turns piles with wheeled pile turning machines. The medium-sized (30,000-80,000 tons/year) composting plant adopts flat-land composting and pool composting, and turning the piles using wheel-type composting machines and rail type composting machines. Large-scale (over 100,000 tons/year) compost using pool composting and aerobic composting towers. Take small-scale as an example: the raw materials are screened to remove inorganic impurities and then composted. When composting, aerobic bacteria should be added. During the composting process, the pile must be turned over. Generally a cycle (7-12 days) is turned over 4-5 times to be organic. The evaluation index of fertilizer ripening. The cooked organic fertilizer should be crushed, and the size of the crushed ground should be above 60 mesh to enter the granulation process.
The granulation process starts with the mixing. The mixing is to uniformly mix the raw materials and additives required for the granulation process, and use the conveyor belt to send the raw materials to the raw material pulverizer for raw material pulverization.
The purpose of raw material crushing is to crush the granulated raw materials to the purpose of granulating demand. After crushing, the raw materials are sent to the granulator fertilizer production machine through the conveyor belt for granulation. The granulation process of organic fertilizer generally adopts disc granulator and drum granulator. Both processes are agglomeration granulation processes. In the granulation process, water needs to be added for granulation, and steam can be added if conditions permit. Adding water must be atomized, the better the atomization effect, the higher the ball formation rate.
After the granulation is completed, the conveyor belt is used to send it to the drying fertilizer production machine for drying. Drying is to use the hot air stove to generate hot air and then take the hot air into the dryer under the action of the induced draft fan to exchange heat and take away the moisture in the granular fertilizer.
The dried fertilizer is sent to the cooler with a belt conveyor. The cooling is to use an induced draft fan to pass the cold air flow through the fertilizer curtain in the cooling machine to take away the hot gas, so that the fertilizer is completely dried.
The dried fertilizer is sent to the grading sieve by the lift-lift-machine. The purpose of grading is to sort out the granular powder needed for commercial fertilizer, and sort the finished fertilizer to the storage bin for packaging. In the re-sieving process, the fine particles and large particles enter the return material pulverizer for pulverization, and the powder material enters the return material belt conveyor and is sent to the granulator for re-granulation.
The dust removal chamber is to take the hot air blower and the cold air blower to take out the dust and use the principle of reducing the wind speed to reduce the dust, the air is emptied, and the dust is collected and then the granulator is used for granulation.
