High-Consistency vs Low-Consistency vs Drum — Pulper Comparison

Parameter	Low-Consistency (Vertical / Type D)	High-Consistency	Drum Pulper
Operating consistency	3–6%	12–18%	14–18%
Fiber action	rotor-to-fiber (faster, some cutting)	fiber-to-fiber (gentle, preserves length)	tumbling (gentlest)
Contaminant handling	shreds impurities → more downstream load	keeps particles larger	discharges trash intact → least burden
Net energy	higher (dilution + pumping)	~15–25 kWh/t	efficient at high volume
Capacity envelope	8–410 t/d	8–220 t/d	150–1,500 t/d
Best furnish	virgin / clean, batch defibering	OCC / mixed / deinking	high-volume OCC, dirty furnish

Typical operating envelopes; exact specs are engineered per order and confirmed on the Henan Zejiang quotation.