Bleaching test apparatus (for hypochlorite bleaching) No.2632

Bleaching tank	effective capacity 10 r (total capacity 15 r), made of SUS-304, tank section in contact with liquid: Teflon coated
Pulp supply	with hole with sealing cover 105 mm in diameter
Chemical liquid feed tank	total capacity1.5 r, made of SUS-304, tank section in contact with liquid: Teflon coated
Pulp concentration	max. 5 %
Agitation rotation speed	24 to 750 rpm
Specimen tank heating	electric heating with band heater on the outer circumference of the tank: three-phase 220 VAC, 4 kW
Temperature control	set temperature automatic control (PID), service temperature: room temperature to 90⁰C Upper limit setting against overheat: 98⁰C
Agitator	with three agitation blades, made of SUS-304, Teflon coated
Motor	three-phase 220 VAC, 0.2 kW
Valve	chemical liquid feed, SUS-304 ball valve, pulp discharge SUS-304 ball valve
Power source	three-phase 200/220 VAC 50/60 Hz 12 A
Outer dimensions	600x700x1200 mm
Instrument weight	80 kg

This apparatus is developed in order to allow hypochlorite bleaching to be performed in a laboratory scale. Optimal bleaching conditions can be obtained through trials by changing the amount of the liquor used, temperature, pulp concentration, agitating speed and/or testing hours.