Outline Program & Prospectus Proposed Course Schedule
Tuesday, 16 th July 2019 (Course Commences at 09:00 hrs):
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Introduction to the Industry
Overview to the pulp, paper & packaging industry Main figures of the national & international productions
Raw material & resource development
Changes in the raw materials, energy & production in the past Paper technology in the future, main barriers & challenges
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Stock Approach Flow o Feed flow into the Stock Approach System
Stock approach system as a black box: which components are added & removed in the stock approach system & what is their influence on the paper making process. Which parameters can be used for controlling the feed flows into the stock approach system Effects of changes in the feed flows into the stock approach flow processing, overview o Stock & water loops Stock flows & main parameters in the stock approach system Water circulation & its effect on the runability & quality, overview o Machinery & build-up Machineries used in the stock approach system & goals of them Water circulation & its effect on the runability, wet end chemistry & quality o Impact on quality & runability The influence on the stock & paper quality in the stock approach system. Typical runability & quality problems related to wet end
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Head box o Distribution systems
Cross flow header/tapered header & central distributor differences & functions Pulsation elimination tank o Design & types Head box types limited to open, pressurised & hydraulic head boxes
Distribution channels, stock dilution system, mixing chamber, turbulence generator & lamellas
o Efflux ratio
Control & adjustment of efflux ratio
Effect of the efflux ratio on the paper quality (fibre orientation & formation)
o Turbulence generation
Different techniques for turbulence generation e.g. rectifier rolls & tube banks
Influence of the turbulence generation on the formation, paper quality & dewatering Differences between macro & micro turbulences o The ‘Slice’ Functions of the slice Adjustment of the slice & its influence on the stock flow, paper quality & dewatering. Velocity forming vs. pressure forming o Impact on paper machine runability & product quality
Adjustments of the head box & their effect on the paper machine runability & the paper quality
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Chemical additives in the wet end o Chemicals to enhance product quality
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