4A molecular sieve is an alkali metal aluminosilicate capable of adsorbing water, NH3, H2S, sulfur dioxide, carbon dioxide, C2H5OH, C2H6, C2H4 and other molecules with a critical diameter not greater than 4A. It is widely used for drying gas and liquid, and can also be used for purification and purification of certain gases or liquids, such as argon.

Selection recommendation: flash dryer (4A molecular sieve dryer, molecular sieve dryer)

4A molecular sieve dryer principle:

Hot air enters the bottom of the dryer tangentially and is driven by an agitator to form a powerful rotating wind field. The slurry enters the dryer through the screw feeder. Under the strong action of the high-speed rotating stirring paddle, the material is dispersed through impact, friction and shearing. The block material is quickly crushed and fully contacted with hot air. , heating and drying. The dehydrated dry material rises with the hot air flow, and the classifying ring intercepts large particles. Small particles are discharged from the center of the ring to the outside of the dryer, and are recycled through the cyclone separator and dust collector. Dry granules or loose materials are subjected to centrifugal force. , poured on the ground, crushed and dried.

Features of 4A molecular sieve dryer:

An organic combination of vortex, fluidization, jet and crushing classification technologies.

The equipment is compact in structure, small in size, high in production efficiency, and can be produced continuously, realizing "small equipment, mass production".

It has high drying strength, low energy consumption and over 70% thermal efficiency.

The material has a short dwell time and good finish quality and can be used for drying heat sensitive materials.

Negative pressure or micro-negative pressure operation, good air tightness, high efficiency, and eliminate environmental pollution.

Model	4A
CAS Number	70955-01-0
Nominal pore diameter	4 angstroms
Shape	Sphere		Pellet
Diameter (mm)	1.7-2.5(8*12 mesh)	3.0-5.0(4*8 mesh)	1.6(1/16 inch)	3.2(1/8 inch)
Size ratio up to grade (%)	≥98	≥98	≥96	≥96
Bulk density (g/ml)	≥0.70	≥0.70	≥0.68	≥0.68
Wear ratio (%)	≤0.20	≤0.20	≤0.40	≤0.40
Crushing strength (N)	≥35/piece	≥85/piece	≥30/piece	≥70/piece
Static H2O adsorption (%)	≥21.5	≥21.5	≥21.5	≥21.5
Static methanol adsorption (‰)	≥15	≥15	≥15	≥15
Water content (%)	≤1.5	≤1.5	≤1.5	≤1.5
Typical Chemical Formula	Na2O . Al2O3 . 2SiO2 . 4.5 H2O (SiO2 : Al2O3 ≈2)