Pulping
Sample Preparation and Chip Testing:
- Disc chipper – Chipping of wood logs or bamboo
- Thickness, Round hole, Tyler sieve chip classification
- Wood chip bark, rot and contaminant content; basic wood or bulk density
Cooking:
Circulation Liquor Digester (20-liter)
- simulates continuous or batch kraft or Soda process with or without additives/surfactants and pre-hydrolysis studies using steam, water, or acid.
- 2 – 3 kg OD sample per cook
- Benefits include:
- Most reliable yield data comparable to pulp mill data,
- Customizability; eg. additives may be applied during cook, or layer cooks,
- Larger pulp sample than smaller reactors that typically allows for brown and bleached (downstream) pulp strength studies
Autoclave Bomb Reactors ( 6 – liter and 1 – liter )
- simulate batch kraft or soda-AQ, and custom projects.
- 700 – 900g OD sample per cook for 6-L reactor and 80 – 100 g OD sample per cook for 1-L reactor
- Benefits include:
- Multiple cooks completed simultaneously in oil bath (up to three 6-L reactors and six 1-L reactors)
- Small sample size accommodated
- Excellent method for optimizing conditions or establishing target conditions
- Ability to withstand high pressure cooks
Screening:
- Simulate defibering and washing
- Range of plate sizes: 0.004”, 0.006”, 0.008”, 0.010”, 0.012”, 0.014”, 0.018”, 0.042”
- Pin shredding screened pulp for representative sample testing
Refining:
Atmospheric Mechanical Refiner (12 – inch diameter)
- Interchangeable plates and patterns
- Refine with plate gap from 0.05” to 0.055”
- Available for running basic mechanical pulping studies
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Determine wood brightness from chips
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Refine fiber bundles or shives from high kappa cooks to desired target freeness
Bleaching
Typical sample size is 300g OD pulp for most bag or reactor bleaching . Some options allow concurrent runs for increased quantities . All bleaching reactions include report of residuals, stage yield, kappa or brightnessStandard bag bleaching
- Any atmospheric bleaching stage, temperature controlled by water bath
- 150 – 300 g OD pulp per bag
Chlorine dioxide bleaching
- In-house generated ClO2
Teflon-lined bomb reactor
- 300 – 600 g OD pulp per reaction, depending on furnish
- Horizontal tumbling
- High temperature and pressure can be accommodated
- Can be pressurized with oxygen before bleaching process
Large scale glass-lined reactor
- 10 kg OD pulp per bleaching reaction
- Stirred agitation at lower consistencies
- Useful for alkaline (E), Chelation (Q) and peroxide (Ep) stages
Oxygen delignification reactor
- Maximum 300 g OD pulp per reaction
- Up to 110 ℃
- Horizontal tumbling
Ozone bleaching reactor
- Maximum 300 g OD pulp per reaction
- Medium (10%) to high (30%) consistency
- Stirred agitation