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Volume 49, Issue 9
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[in Japanese]1970 Volume 49 Issue 9 Pages 645
Published: September 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1845K) -
Shigeru Yanagihara1970 Volume 49 Issue 9 Pages 646-655
Published: September 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSMost emission from automobiles are products of high temperature and high pressure combustion in combustion chamber. The formation of carbonmonoxide and nitric oxide are explained by equilibrium in the combustion reaction, and the quench zone in combustion chamber yields unburned hydrocarbons.
Carbonmonoxide and hydrocarbons can be oxidized in expansion stroke or exhaust systems. The reduction of nitric oxide and particulate emission are most serious problems in exhaust control techniques. The exhaust thermal reactor and catalytic converter have been developed, while it seems that non leaded fuel is necessary to work them effective. Low emission vehicle should appear by 1975, and the power plant of family car still may be gasoline engine. In the near future, the fuel will be subject to more severe restriction in quality to reduce the pollutants in exhaust gas.View full abstractDownload PDF (1505K) -
Kinji Hoshizawa, Kazuo Koyata1970 Volume 49 Issue 9 Pages 656-665
Published: September 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThis report describes the formation and their prevention of acid smuts at oil-fired industrial boilers. Results obtained from the field tests were as follows.
1) The acid smuts were mainly formed in the stack and falled out within the limits of 400m from the stack in conditions of light wind.
2) Full load condition and load up period were critical from the point of view of smuts emission, which increased with increasing excess air.
3) Three methods of prevention against acid smuts emission tried were.
a) to retain minimum excess oxygen under 1.0 percent in order, to decrease the acid dew point below flue gas temperatures.
b) to neutralize SO3 by mean of NH3 injection of over 0.04 percent by weight of fuel oil.
c) most steam-power plants in Japan have been operated eliminating completely not only acid smuts but dust in flue gas.View full abstractDownload PDF (3098K) -
Atomizing Feeders of Dewatered SludgeKazuo Ishii, Mutsuo Koizumi, Tadahiro Machiyama, Katsuya Nagata, Nobor ...1970 Volume 49 Issue 9 Pages 666-673
Published: September 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFor sanitary disposal of sewage sludge, a new incinerating method with high performance is studied. In the first part, two types of atomizing apparatus, by which dewatered sludge is fed to furnaces in particulated form, are developed. One is the evaporation type atomizer, in which dewatered sludge is pressur ized, heated and fushed out from a nozzle to atmospheric pressure, then a part of water in the sludge is instantaneously evaporated at the outlet of the nozzle and the sludge is atomized into very fine particles. The other is the air jet type atomizer, in which sludge flow from a nozzle is atomized by high speed air jet.View full abstractDownload PDF (2403K) -
Incinerator with Slag-tap FurnaceKazuo Ishii, Matsuoki Okuda, Mutsuo Koizumi, Tadahiro Machiyama, Katsu ...1970 Volume 49 Issue 9 Pages 674-682
Published: September 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIn this paper, a new type incinerator with slag-tap furnace for dewatered sludge is reported. This incinerator is composed of atomizing feeder of sludge, slag-tap furnace, heat exchanger, air preheater and cyclone dust collector. Air jet type sludge atomizer mentioned in part 1 and heavy fuel oil burner are placed at top of the furnace. Refractory materials which are packed in the furnace are suspended by five water cooled tubes with refractory coating and heated by firing of fuel oil. On them, dewatered sludge is fed in particulated form and burned immediately in contact with high temperature, high speed combustion gas of fuel oil. Ash in sludge is melted into slag and flows down into slag pit through bank of refractory materials.
This incinerator has following three merits.
(1) Dustless flue gas is issured from furnace, because ash in sludge is melted into slag at bank of refractory materials.
(2) Flue gas is odorless for high temperature combustion.
(3) Incineration plant is made small size for its high performance.View full abstractDownload PDF (2852K) -
Kazuo Yamagishi, Yasuo Kakegawa, Hirobumi Iida1970 Volume 49 Issue 9 Pages 683-692
Published: September 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe heat transfer in the industrial furnaces is conducted mainly by radiation and convection. But so far in the industrial furnaces particularly in the oil fueled and electiricaly heated furnaces radiative heat transfer mostly prevails. For the purpose of realizing more efficient heating it is necessary to make effective use of con-vective heat transfer. High speed burner which have ability to effuse high temperature combustion product at high speed has been developed. The high speed burner supplies not only heat but also mechanical energy in the form of jet gas stream into the furnace. This jet stream causes violent recirculative flow of hot gases, which is of great use to obtain rapid heating, uniform heating, thermal efficiency improvement and so on. Fundamental structure of the high speed burner, hydrodynamic characteristics of high speed hot gas stream are briefly described and the results of actual applications are also refered to.View full abstractDownload PDF (4395K) -
1970 Volume 49 Issue 9 Pages 699-707
Published: September 20, 1970
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1210K)
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