The output of a double roller press granulator is not a fixed value; it is primarily determined by four factors: equipment specifications, material characteristics, operating parameters, and operation and maintenance.

First, the specifications of the fertilizer production machine itself form the foundation of output. Larger roller diameters and effective roller surface lengths result in a larger material contact area per extrusion, leading to a higher feed rate per unit time. The power of the main motor and the transmission capacity of the reducer must also be matched accordingly; larger models have a significantly higher rated output than smaller machines. The groove shape and arrangement of the roller skin also have an impact; a well-designed groove can increase the amount of material formed per pass.

Second, the physical properties of the raw material have the most direct impact. The moisture content of the material needs to be controlled within a reasonable range. Excessive moisture content easily leads to roller sticking and material blockage, while insufficient moisture results in excessive powder and a large amount of return material, both of which reduce effective output. The hardness, flowability, and particle size of the raw material are also crucial. Loose, flowable powder feeds smoothly, resulting in stable output; lumpy materials or materials containing hard impurities require frequent shutdowns for cleaning, significantly reducing output. Different raw materials present varying degrees of difficulty in forming, and the output also differs significantly when processing sulfur, inorganic salts, and organic fertilizer raw materials.

Furthermore, equipment operating parameters are crucial. The spindle speed directly determines the extrusion frequency. Within the equipment’s allowable range, higher speeds result in higher output, but blindly increasing the speed should be avoided, as it can lead to poor forming and equipment overload. The gap be

The large wheel compost turning machine is specifically designed for trough-type aerobic fermentation. The matching fermentation tank is the core area for organic fertilizer composting. It is typically constructed of reinforced concrete, ensuring durability, uniformity, and adaptability for reciprocating operation. The length of a single fermentation tank is commonly 30–80 meters, and the tank width, depending on the disc turner model, is available in mainstream specifications of 3 meters, 4 meters, and 5 meters. The tank depth is uniformly controlled at 1.6–2 meters, and the pile height does not exceed 1.5 meters to ensure sufficient oxygen supply for fermentation.

Forced ventilation pipes are pre-embedded at the bottom of the tank, along with an aeration fan. Air is delivered to the bottom of the pile through these pipes, working in conjunction with the turner’s agitation to form a three-dimensional oxygen supply system, accelerating organic matter decomposition and shortening the composting cycle. Straight tracks are cast on both sides of the tank for the large-disc compost turner to move and position itself. The flatness of the tracks directly affects the stability of the equipment’s operation, preventing deviation and abnormal wheel wear.

The entire fermentation tank is treated with waterproofing, seepage prevention, and corrosion resistance. The inner walls are coated with anti-corrosion mortar or a special coating to resist corrosion from manure and biogas slurry, while preventing leachate leakage and environmental pollution. Operating channels and collection ditches are provided between the tanks to collect leachate for recycling, achieving environmentally friendly production in the organic fertilizer fermentation line.

Compared to open-air windrow fermentation, tank fermentation offers stronger sealing, less odor and dust diffusion, and is less affected by rain and snow, allowing for continuous production year-round. Multiple fermentation tanks can be us