In the conventional production of humic acid products such as sodium humate and potassium humate, air is commonly used as the drying medium for spray granulation and drying. Nevertheless, this process has prominent drawbacks. Low drying rate extends the production cycle, while poor thermal efficiency leads to energy waste. A large amount of sensible heat and latent heat contained in exhaust gas is difficult and costly to recover. Most enterprises have to discharge the exhaust directly, which increases energy consumption and aggravates environmental pollution.

The innovative application of superheated steam as the drying medium brings a revolutionary breakthrough to the humic acid industry. According to the technical team of Longxin Drying, superheated steam drying boasts multiple advantages. Firstly, its high thermal conductivity and low latent heat of phase change greatly improve heat and mass transfer efficiency, delivering a remarkable increase in output. Secondly, the steam circulation system realizes closed-loop utilization of thermal energy, cutting net energy consumption and drastically reducing exhaust emissions, thus solving the environmental challenges of traditional processes. Furthermore, the superheated steam environment effectively inhibits oxidative degradation of materials, ensuring product stability and production safety. It is especially suitable for the refined production of high-value-added potassium humate.