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Volume 54, Issue 3
Displaying 1-7 of 7 articles from this issue
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[in Japanese]1975 Volume 54 Issue 3 Pages 131
Published: March 20, 1975
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (216K) -
Tokuji Ozawa1975 Volume 54 Issue 3 Pages 132-145
Published: March 20, 1975
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSAs energy crisis deepens, coal is again highlighted as future energy resource. Although conversion methods of coal to non-polluted gas fuel or liquid fuel have been intensively developing, these methods require vast capital investment for plant construction and high manufacturing cost.
Since the First International Conference on Fluidized-Bed Combustion (FBC) in 1968, considerable attention has been given to FBC. The features of FBC are as follows:
(1) less capital requirement
(2) capable to use any kind of coal
(3) low SO2 emission by adsorption with limestone or dolomite
(4) low NOx and particles emission
This paper presents the review of the FBC process developed by National Coal Board in UK and future prospect of FBC.View full abstractDownload PDF (1592K) -
Recent Progress in CO methanation TechnipuebyMinoru Kitagawa1975 Volume 54 Issue 3 Pages 146-156
Published: March 20, 1975
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSRecently, Methanation-the hydrogenation of carbon mono-oxide to methane-gas become recognized as one most important process for making SNG i. e. methane-rich gas from low Btu gas having high content of CO and H2.
Especialy in USA, because of a shortage of domestic natural gas and abundence of coal resources, development of new methanation processes is being carried on exten-sively for manufacture of SNG from coal.
Also in Japan, as development of SNG process is incorporated in“ Sun-shine Project”, there is a growing concern about methanation process for SNG.
This report reviews some of new processes which are being developed, refering to the present situation of development.View full abstractDownload PDF (1137K) -
Koji Sega1975 Volume 54 Issue 3 Pages 157-168
Published: March 20, 1975
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSNowadays most major industries can be impossible to be supported by the past policy to purchase inexpensive power or fuel.
They must save important resource with heat recovery plants somehow to make efficient use of low temperature waste heat.
We have made two commercial freon turbine plants, one a 3800 kW refrigeration and electric power plant and the other an 800 RT Freon turbine driven turbo-chiller and recently succeeded in the slandardization of a 490 kW Freon turbine generator using Freon-11 as a working fluid.
The intrinsic properties of this medium which vaporizes at lower temperature is ideal for use in plants utilizing waste heat.
This paper introduces Rankine cycle of freon turbine, specification of our machines and also describes how to select suitable working media and how to estimate potencial power output of heat source.View full abstractDownload PDF (1816K) -
Conciderations on the Limestone Calcination and Sulfur Dioxide Fixation in Boiler FurnaoesYoshimi Ishihara1975 Volume 54 Issue 3 Pages 169-174
Published: March 20, 1975
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe dry limestone injection process was considered to be one of the most simplest processes for removing sulfur oxides from flue gas in a steam power plant boiler. Therefore, researches of the process were conducted earnestly in Germany, U. S. A. and Japan.
This is the first report of our research on the dry limestone injction process which were carried out at the Central Research Institute of Electric Power Industries. This report contains the results of thermodynamic considerations on the reaction of the dry limestone injection process in a boiler which involve limestone calcination and sulfur dioxide fixation.
Their results are concluded as follows.
(1) Limestones or hydrated limes decompose to calcium oxide at above 770°C or 400°C, respectively, when the carbon dioxide and water vapor concentrations are 12 and 10 per cent in flue gases.
(2) The reaction of calcium oxide with sulfur dioxide will occure at below 1250°C when the concentrations of sulfur dioxide and oxygen are 0.2 and 3 per cent in flue gas.View full abstractDownload PDF (711K) -
Effects of Reaction Conditions on Sulfur OxidesYoshimi Ishihara, Chuhei Asakawa, Hisashi Hukuzawa1975 Volume 54 Issue 3 Pages 175-184
Published: March 20, 1975
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFrom the thermodynamic considerations on the reactions in the dry limestone injection Process, we described in the previous report that the sulfur oxide absorbtion will occure at below 1250°C.
In this reports, we investigated the effects of the reaction conditions on the sulfur oxides removals using the reaction tower type experimental apparatus. Their results are concluded as follows.
(1) The sulfur oxides removal incresaed proportionally to the amounts of injected limestone.
(2) The sulfur oxides removal decreased inversely with the one fourth to one third power of particle size.
(3) The Tokunoshima limestone was the most reactive limestones among the various kinds of them we investigated. Its reactivity was twice as much of the usual limestones in Japan.
(4) Almost the same sulfur oxides remals were obtained when the limestones were injected into combustion gases at the temperatures between 900-1, 200°C.
(5) The sulfur oxides removal increased proportionally with 0.3-0.5 power of sulfur dioxide concentration.View full abstractDownload PDF (1086K) -
[in Japanese]1975 Volume 54 Issue 3 Pages 185-188
Published: March 20, 1975
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (581K)
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