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Volume 28, Issue 10
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1974 Volume 28 Issue 10 Pages 03
Published: 1974
Released on J-STAGE: November 10, 2009
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Origin of Tokyo Mill of Senju Paper; vicissitude of Mill and Mill waterNobuyoshi Kondo1974 Volume 28 Issue 10 Pages 458-467
Published: 1974
Released on J-STAGE: January 22, 2010
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Norio Sakurai1974 Volume 28 Issue 10 Pages 468-472
Published: 1974
Released on J-STAGE: November 10, 2009
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Toshio Ichimi1974 Volume 28 Issue 10 Pages 473-477
Published: 1974
Released on J-STAGE: November 10, 2009
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No.3 B/M 1000 LEVEL IIKanji Mutoh, Norio Nakamura, Masato Yamamoto1974 Volume 28 Issue 10 Pages 478-485
Published: 1974
Released on J-STAGE: November 10, 2009
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1974 Volume 28 Issue 10 Pages 492
Published: 1974
Released on J-STAGE: November 10, 2009
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1974 Volume 28 Issue 10 Pages 493-494
Published: 1974
Released on J-STAGE: November 10, 2009
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Kyuzaburo Ishiguro1974 Volume 28 Issue 10 Pages 495-500
Published: 1974
Released on J-STAGE: November 10, 2009
JOURNAL FREE ACCESSThough many reports have been published about theoretical analysis of paper drying mechanism on paper machine dry part, they are mostly inadequate for application in practical design and operation of dry part and hence for actual use. This is attributed to the fact that the physical features of paper drying is variable in nature and is affected by the quality of steam and by the conditions of condensate and air-evaluation system; the thermal features of dry part itself is also a variable. This paper shows fundamental formula about paper drying on paper machine dry part, dictates characteristics of coefficients used in these formula, states that the results of theoretical analysis of paper drying are difficult to be applied for practical improvement of operation and design of paper machine dry part, and presents study on effect of condensate behavior on paper drying. Development of dry part is slower than that of other parts of paper machine. If the reason of this fact is attributed to difficulty of theoretical analysis of paper drying on multi-cylinder dryer, the study should be directed to the suction dryer which is easy for applying such analysis and that will be effective for improving dry part.View full abstractDownload PDF (1319K) -
Production from the Pyrolysis Residue by the Steam ActivationKiichi Nagaya, Kazuo Maeda, Toshiyuki Nakata1974 Volume 28 Issue 10 Pages 501-506
Published: 1974
Released on J-STAGE: November 10, 2009
JOURNAL FREE ACCESSHigh and low concentration wastewaters of organic materials could be usually discharged from the pulp making plants. The former could be the black liquor and the latter could be the washer effluent. The process combined the production of activated carbon from the former and the treatment of the latter with the products is considered an effective system for the wastewater treatment.
In this paper, the method for production of powdered activated carbon from the pyrolysis residue of the sodium-base SCP black liquor by the steam activation was discussed.
The black liquor was pyrolyzed in a current of dry nitrogen at 500°C. The pyrolysis residue and its leaching residue with hot water and/or aqueous hydrochloric acid were activated with steam at 650-900°C.
The activated carbon yields are decreased substantially by increasing the amount of sodium compound sexisted with the carbonaceous materials in the residue. Sodium compounds have a catalytic ability for the water gas reaction, especially, the water-insoluble sodium compounds combined with carbonaceous materials have the higher ability.View full abstractDownload PDF (1416K) -
IV. Pyrolysis of Eucalyptus Black LiquorRaysabro Oye, Takayuki Okayama1974 Volume 28 Issue 10 Pages 507-514
Published: 1974
Released on J-STAGE: November 10, 2009
JOURNAL FREE ACCESSIt is reported that the burning characteristics of concentrated eucalyptus black liquor is impaired by polyphenolic extractives. In an attempt to assess the burning properties of black liquors from E. calophylla, E. marginata and E. diversicolor of Western Australia, comparing with that from domestic hardwoods, vacuum dried black liquors were pyrolysed by a Shimazu Pyrolyser PYR-1A at 400°C in helium atmosphere to generate low molecular gases, such as CO2, CO and methane, which were determined by a TCD gaschromatograph with active carbon columns at 150°C. It was found that eucalyptus black liquors volatilized more CO2 and less CO and CH4. However, there was no appreciable difference in gas volatilization between eucalyptus and hardwoods black liquors after removing inorganic components by dialysis.
The thermogravimetric analysis and the differential thermal analysis were carried out on eucalyptus black liquors in nitrogen at temperature rise of 5°C/min. by Agne TGD-1500 differential thermoanalyser. Generally, eucalyptus black liquor showed much less weight loss at pyrolysis above 300°C. A DTA curve of black liquor from E. calophylla had a distinct endothermic peak at 160-180°C, which was shifted to lower temperature and diminished by the previously mentioned partial wet combustion and preheating cooking.
Hemicellulose extracted from domestic hardwoods and various phenols, including ellaggic acid and kino were added to. hardwoods black liquor, which were investigated according to the above mentioned methods.
As a conclusion, it was, assumed that the poor burning properties of eucalyptus black liquor were caused by relatively inert thermal degradation with volatilization of comparatively more quantity of incombustible CO2 and less CH4 and CO, which are essential to burning, due to polyphenolic extractives.View full abstractDownload PDF (1464K)
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