Application of Classified Impact Mill in Desulfurization: Sodium bicarbonate (NaHCO3), commonly known as baking soda, can be used as an adsorbent for flue gas desulfurization. It chemically adsorbs acidic pollutants in the flue gas while also physically removing some inorganic and organic trace substances. This process involves injecting ultra-fine sodium bicarbonate powder into high-temperature flue gas, where it decomposes into sodium carbonate (Na2CO3), water (H2O), and carbon dioxide (CO2). Sodium bicarbonate

raw material is generally coarse particles of only a few tens of mesh. To achieve high reactivity, the adsorbent must have a large specific surface area. Before injection into the desulfurization device, sodium bicarbonate must undergo ultra-fine grinding. Working principle: impact mill, impact grinder, classified impact mill. Sichuan Zhongjin Powder Equipment Co., Ltd. independently developed and produced a specialized pulverizing and classifying machine for flue gas desulfurization (Patent No. ZL 201820900377.6), which grinds sodium bicarbonate to d90 < 15μm and uniformly disperses it into the desulfurization tower device. There, it forms turbulence with the gas flow, resulting in mutual impact and friction, further promoting the desulfurization reaction. Compared to other specialized desulfurization pulverizing and classifying machines, the ZJ-C series equipment from Sichuan Zhongjin Powder Equipment offers the following major advantages:

1. Intelligent control, one-key start/stop, allowing operation even by personnel unfamiliar with the structural principles, greatly saving manpower.

2. Intelligent control during operation prevents seizure of moving parts.

3. Completely resolves scaling issues in the conveying fan; the system achieves zero scaling, eliminating the need for descaling and cleaning of the conveying fan.

4. Grinding wear-prone parts use advanced high-wear-resistant alloys from domestic and international sources, with wear resistance over eight times that of ordinary grinders.

5. Integrated pulverization and classification, achieving ultra-fine grinding while completing the powder selection process.

6. Fully sealed operation ensures full utilization of fine powder with no environmental pollution.

7. Easy system operation and maintenance, low power consumption, stable operation, and high output; 8. Infinitely variable speed adjustment without shutdown, achieving fineness up to

d90=10μm. Sichuan Zhongjin Powder Desulfurization Equipment is widely used in coal power plants, refractory material factories, waste incineration, and other flue gas desulfurization treatments. Compared to other purification methods, the ZJ-C series equipment is simple, durable, and has lower investment and operating costs.