High Capacity (30TPD-2500TPD) Sawdust Drying Machine with PLC Control and Multi-pass Rotary Drum for Biomass Fuel Plants

‌一,Product Overview: Core Preprocessing Equipment for Biomass Fuel Plants‌

The sawdust drying machine is a critical foundational unit for biomass fuel plants, specifically designed to process high-moisture sawdust, wood shavings and other forestry/wood processing waste. It converts raw materials with an initial moisture content as high as 40%-60% into dried sawdust with stable moisture (usually controlled at 8%-15%), which fully meets the strict feed requirements for subsequent biomass pelletizing, briquetting or direct clean combustion. This equipment directly solves the core  points of biomass fuel plants, such as low fuel calorific value, unstable combustion, easy coking and low production efficiency caused by high-moisture raw materials, and is the key guarantee for the whole plant to achieve continuous, stable and high-yield clean production of biomass fuel.

‌二,Working Principles and Mainstream Technical Solutions‌

For the production characteristics of biomass fuel plants, three mature and widely verified drying technical routes are available:

1. ‌Multi-pass Rotary Drum Dryer‌: This is the most mainstream and high-capacity model. The wet sawdust enters the multi-layer nested drum, and the specially designed anti-sticking and wear-resistant lifting flights continuously turn over the materials to form a uniform material curtain. The hot air flows through the drum in a reasonable flow path, completing full heat exchange in a long enough residence time. It can adapt to large-scale continuous operation of 10-50 tons per hour, with strong tolerance for raw material fluctuations, and is the preferred choice for large and medium-sized biomass fuel plants.
2. ‌Waste Heat Matching Drying System‌: This customized solution makes full use of the waste flue gas and residual heat generated by the biomass fuel plant's own boiler or power generation system as the heat source for drying. It does not need to consume extra high-value fuel, which can reduce the unit energy consumption of drying by more than 20%. It is highly integrated with the plant's own energy system, and is a typical energy-saving and cost-reducing configuration for modern biomass fuel plants.
3. ‌Intelligent Integrated Drying Unit‌: This highly automated model integrates functions such as automatic feeding, real-time moisture detection, frequency conversion speed regulation and automatic discharge. It can automatically adjust the drying intensity according to the real-time moisture of incoming materials, avoiding over-drying or under-drying, and the outlet moisture is highly stable. It can realize unattended operation, greatly reducing labor costs, and is suitable for new-generation intelligent biomass fuel production lines.

‌三,System Configuration and Application Values‌

The complete supporting system of the sawdust drying machine for biomass fuel plants covers the main drying unit, heat source system (biomass hot blast stove or waste heat recovery device), feeding and discharging conveying equipment, high-efficiency dust removal and deodorization system, and full-process automatic control system. Its core values are prominent: it can greatly improve the calorific value of finished biomass fuel, make the combustion process more sufficient and stable, and avoid the problem of furnace coking; it can realize the full utilization of local low-cost wood waste, greatly reduce the raw material procurement cost of the plant, and improve the overall economic benefit; the system is equipped with a complete explosion-proof and fire-proof safety protection mechanism, which can adapt to the long-term 24-hour continuous operation requirements of industrial plants, and effectively support the large-scale, standardized and clean production of biomass fuel.

• Technical Specifications

  Product Specs (m)	Capacity (T/H)	Main Motor Power (kW)	Main Motor Model	Main Gearbox Model	Ratio
  φ1.2×10m	2.5	7.5	Y160M-R3	ZL50-16-1	-
  φ1.5×12m	3.3 - 4.9	10	Y160L-6B3	JZQ500-III-2F	-
  φ1.5×15m	4 - 6	18.5	Y200L-6	JZQ500-III-2F	-
  φ1.8×12m	4 - 6	11	Y200L-6	ZQ50-16II-2	16.46
  φ2.2×12m	7 - 12	18.5	Y160L-6	JZQ650-III	31.5
  φ2.2×14m	7 - 12	18.5	Y160L-6	JZQ750-III	31.5
  φ2.2×16m	12	30	Y225M-6	JZQ750-III	31.5
  φ2.4×14m	12	30	Y250M-6	JZQ750-III	31.5
  φ2.4×18m	10 - 13	37	Y250M-6	ZL85-13-1	27.16
  φ2.4×20m	10 - 14	37	Y250M-6	ZL85-13-1	27.16
  φ3×20m	25	55	Y250M-4	ZL100-16-1	41.52
  φ3×25m	32 - 36	75	YR280M-4	ZL100-16-1	41.52

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