Digesters TRIZ Cases

Cross-stage data sharing links woodyard, fiberline, and later stages to stabilize pulp quality and balance capacity in chemical pulp production.

A rotatable disc and reduced-bore adaptor center hot biomass discharge from pressurized containers to cut wear, plugging, and steam use.

Standardized supply and process modules speed fiber plant commissioning while maintaining consistent production-quality pulp.

Controlled peroxide delignification removes lignin from biomass at ambient conditions, cutting energy use and chemical waste while preserving cellulose.

Measured paper piece flow is fed back to tube and motor control, reducing target deviation in recycled sheet production.

In pulping operations, real-time tail measurements adjust puller speed and rider-roll pressure to limit slippage, breakage, and clogging.

Flow measurements in a pulp feeder enable dynamic annular-gap adjustment to limit pressure loss and metal contact risk.

Segmented multi-part rotating screw design reduces downtime and material usage by replacing only worn high-load cast iron sections.

A bin arrangement with a rectangular outlet and counter-rotating pocket feeders ensures uniform material flow.

Steam injectors with small openings introduce direct steam into the liquor phase to raise the impregnation zone temperature.

A helical ramp inlet arrangement aligns with screw feeder rotation to guide chip slurry into the screen basket.

Indirect black liquor heating generates clean flash steam for digester heating, reducing live steam consumption and volatile compound risks.

A reflectance-based fluorometer measures inert fluorescent tracers mixed with surface additives to determine coating concentration in papermaking processes.

Vertical headers with throttle holes prevent precipitation blockages in withdrawal compartments, eliminating costly cleaning shutdowns.

High polysulfide concentration during low temperature impregnation stabilizes carbohydrates, reducing alkali consumption and increasing pulping yield.

Horizontal support arches with expansion slots flex to match digester vessel walls.

Flush-out grooves on conical surfaces remove abrasive particles via hydraulic flow, reducing wear rates and extending operational life.

Segmented screen slides into frame recesses to enable quick withdrawal compartment cleaning without obstructing chip column flow.

Wedge-shaped bottom surfaces guide chip slurry to a pump, eliminating mechanical stirring and preventing material buildup in pulping vessels.

A feeding arrangement uses a force-feeding screw to compress non-wood plant material before it enters a plug screw feeder.

Enzymatic treatment of fibrous cellulosic material reduces water consumption and energy usage by maintaining low moisture content during processing.

Laser line projection and camera detection replace vulnerable mechanical rulers to eliminate cable complexity and calibration errors.

Calculates a wood material indicator ratio from chip mass flow to adjust chemical dosing and pulping temperature in real time.

Flexible woven mesh screen assembly reduces scale deposits and mechanical stress in pulp digesters.

Segmenting the valve body and rotating the member expose fresh surfaces, reducing abrasive wear in lignocellulosic processing.

Rotation of the cylindrical pressure cooker improves gas-liquid-solid mixing efficiency in horizontal digesters.

Extended diverging inlet geometry maintains full screw filling during high-speed operation, boosting production capacity and dewatering efficiency.

A rotating tissue digestor accelerates alkaline hydrolysis to dissolve soft tissue from bone remains.

A movable hinged valve plate adjusts the inlet flow passage area in a flash tank to manage black liquor velocity.