high gas velocity ,many leaves and small resistance; large surface area ，adequately solve the air-fluid exchange;high operational flexibility

 

 widely used in environmental protection devices for removing chlorine, oxygen,carbon dioxide,etc.

 

Name	type	Size	Surface area	Void rate	No.element	Bulk density	Dry packing factor
	Φ	D×H×δ	α	ε%	n	γp	α/ε3
	mm	mm	m2/m3	m3/m3	N/ m3	kg/m3	m-1
Polyhedral hollow ball	Φ25	Φ25×1.0	460	90	64000	71	631
	Φ38	Φ38×1.2	325	91	25000	71.3	355
	Φ50	Φ50×1.5	236	91	11500	70	313