Developments in pulp and paper manufacture from sugarcane ...
Developments in pulp and paper manufacture from sugarcane ... Developments in pulp and paper manufacture from sugarcane ...
Bagasse Paper Mill Units Purchased pulp & stock preparation Paper Machine (PM) approach flow system & wet end Paper machine dry end 38
PM Approach Flow System & Wet End This flowsheet shows the paper machine approach flow system and the wet end of a fourdrinier paper machine. It should be noted that this configuration is a little dated (about 12 years old) and that some changes to the wet end would be made for a modern mill. However, the overall concept still holds true. The two pulps – softwood and bagasse along with several additives such as fillers, optical brighteners, retention aids are added in controled amounts to the blend chest where they are mixed together into a uniform slurry. The blended stock is then pumped to the machine chest from which it is pumped through a final touch-up refiner to a stuff box for metering into the paper machine approach flow system. The stock from the stuff box is fed to the suction of the fan pump from which it is fed to a final cleaning and screening system and then to the paper machine headbox. The headbox distributes the slurry onto the paper machine wire and as water is removed the sheet of paper is formed. This flowsheet shows the paper sheet entering the couch pit which would occur of there is a paper break but typically it is sent to the press section of the paper machine shown on the next flowsheet. 39
- Page 1 and 2: Developments in pulp and paper manu
- Page 3 and 4: Bagasse Pulp Mill Units Moist depi
- Page 5 and 6: Moist Depithing 5
- Page 7 and 8: Type Pro Zell Depither Driving powe
- Page 9 and 10: Bagasse Pulp Mill Units Moist depi
- Page 11 and 12: Wet Bulk Storage Bagasse wet bulk
- Page 13 and 14: Wet Bulk Storage Artist rendition -
- Page 15 and 16: Wet Bulk Storage Boom Stacker - Tam
- Page 17 and 18: Wet Depithing/Cleaning Wet depither
- Page 19 and 20: Bagasse Pulp Mill Units Moist depi
- Page 21 and 22: Cooking & Brownstock Washing Contin
- Page 23 and 24: Cooking & Brownstock Washing Browns
- Page 25 and 26: Oxygen Delignification Oxygen delig
- Page 27 and 28: Bagasse Pulp Mill Units Moist depi
- Page 29 and 30: Screening & Cleaning Screens GL&V H
- Page 31 and 32: Bagasse Pulp Mill Units Moist depi
- Page 33 and 34: Bleaching This flowsheet shows an E
- Page 35 and 36: Bagasse Paper Mill Units Purchased
- Page 37: Purchased Pulp & Stock Preparation
- Page 41 and 42: PM Approach Flow System & Wet End V
- Page 43 and 44: Paper Machine Dry End The paper she
- Page 45 and 46: Paper Machine Dry End Press Section
- Page 47 and 48: Paper Machine Dry End Size Press Me
- Page 49: Paper Machine Dry End Reel Metso Va
PM Approach Flow System & Wet End<br />
This flowsheet shows the <strong>paper</strong> mach<strong>in</strong>e approach flow system <strong>and</strong> the wet end of a<br />
fourdr<strong>in</strong>ier <strong>paper</strong> mach<strong>in</strong>e.<br />
It should be noted that this configuration is a little dated (about 12 years old) <strong>and</strong> that some<br />
changes to the wet end would be made for a modern mill. However, the overall concept<br />
still holds true.<br />
The two <strong>pulp</strong>s – softwood <strong>and</strong> bagasse along with several additives such as fillers, optical<br />
brighteners, retention aids are added <strong>in</strong> controled amounts to the blend chest where they<br />
are mixed together <strong>in</strong>to a uniform slurry.<br />
The blended stock is then pumped to the mach<strong>in</strong>e chest <strong>from</strong> which it is pumped through a<br />
f<strong>in</strong>al touch-up ref<strong>in</strong>er to a stuff box for meter<strong>in</strong>g <strong>in</strong>to the <strong>paper</strong> mach<strong>in</strong>e approach flow<br />
system.<br />
The stock <strong>from</strong> the stuff box is fed to the suction of the fan pump <strong>from</strong> which it is fed to a<br />
f<strong>in</strong>al clean<strong>in</strong>g <strong>and</strong> screen<strong>in</strong>g system <strong>and</strong> then to the <strong>paper</strong> mach<strong>in</strong>e headbox.<br />
The headbox distributes the slurry onto the <strong>paper</strong> mach<strong>in</strong>e wire <strong>and</strong> as water is removed<br />
the sheet of <strong>paper</strong> is formed.<br />
This flowsheet shows the <strong>paper</strong> sheet enter<strong>in</strong>g the couch pit which would occur of there is a<br />
<strong>paper</strong> break but typically it is sent to the press section of the <strong>paper</strong> mach<strong>in</strong>e shown on the<br />
next flowsheet.<br />
39
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