NPK production lines require drying and cooling because the granules, after granulation, have a moisture content of 15%-25% and a loose structure. Without drying, they lack strength and break during transport; without cooling, residual heat drives moisture migration, leading to clumping and mold growth after packaging. These two steps address the independent issues of “forming” and...

When the fermentation tank temperature is not rising or only partially heating up, the troubleshooting order should start with “whether the microorganisms are consuming food and oxygen,” rather than immediately suspecting the inoculant. First check the uniformity of turning and aeration, then check the moisture content and C/N ratio. Localized heating is often due to insufficient turning and...

Cow manure granulation does indeed have a lower risk of mold clogging and wall sticking than chicken manure: Chicken manure is extremely sticky and easily adheres to the inner walls of the equipment and mold holes even after composting, requiring higher standards for anti-sticking and dehydration; cow manure has a crude fiber content of about 30%-40%, and its stickiness decreases significantly...

The answer is: a single rotary drum granulator is suitable for large-scale continuous production lines with a capacity of 10-30+ tons/hour, producing dense granules with good sphericity; while a disc granulator is more suitable for small to medium-sized production lines with a capacity of 1-10 tons/hour and for switching between multiple product formulations. The two are not mutually exclusive;...

There’s no single answer to the drying temperature of organic fertilizer; it primarily depends on the fertilizer’s characteristics. The core value of bio-organic fertilizer is its live microorganisms, so drying must be designed to prevent damage. Ordinary organic fertilizers and compound fertilizers prioritize dehydration efficiency, allowing for a more relaxed temperature window. However...

Severe wall sticking in a disc granulator doesn’t necessarily mean the formula needs changing. Raw material moisture content exceeding 35%, peeling of the anti-stick coating on the inner wall of the disc, or scraper failure can all cause wall sticking. Checking moisture content and scrapers first, and then considering formula adjustments, is a more efficient troubleshooting approach. The essence...

There is no fixed outlet temperature for NPK coolers; it depends on the hygroscopicity of the fertilizer type and storage conditions. For DAP, MAP, and regular NPK granules, the cooled outlet temperature is generally required to be no higher than approximately 71°C. However, for hygroscopic formulations containing potassium chloride and high-nitrogen urea-based products, the outlet temperature is...

The capacity bottlenecks in organic fertilizer production lines and NPK fertilizer production lines mostly lie not in the rotary drum granulator itself, but in the two “invisible design variables” of the return material ratio and moisture balance. The industry benchmark for the return material ratio in rotary drum granulation is 0.8:1–1.2:1, while for roller-pressed fertilizer...

The rotary drum granulation production line was delivered to Yichun City, Jiangxi Province on June 6, 2026. This is the first rotary drum granulation production line delivered by Huaqiang Heavy Industry to western Jiangxi in 2026. It will be used in the livestock and poultry manure resource utilization project of a local organic fertilizer company to produce commercial granulated organic...

The rotary drum granulation production line was delivered to Yichun City, Jiangxi Province on June 6, 2026. This is the first rotary drum granulation production line delivered by Huaqiang Heavy Industry to western Jiangxi in 2026. It will be used in the livestock and poultry manure resource utilization project of a local organic fertilizer company to produce commercial granulated organic...