Study on thermal characteristics of a high temperature air combustion boiler (1st report, experimental demonstration)

Hiromichi Kobayashi, Kunio Yosiiikawa

Research output: Contribution to journalArticle

Abstract

A new concept compact boiler using high temperature air is proposed and experimental demonstration is done. In the boiler, high temperature air combustion is realized. Fuel can be efficiently burned by high temperature preheated air of about 800°C∼1 000°C under low oxygen content (∼5%). The temperature distribution in the furnace is very uniform and there is no hot spot, so that low NO.v emission (∼40 ppm) and relatively high .average temperature in the furnace can be achieved. Thermal efficiency of more than 90% is accomplished including waste heat recovery of exhaust gas. This boiler is useful to partial load operation, because the response of thermal output is linear. This boiler is also suitable for low calorific value gas derived from gasification process of coal and wastes with no dioxin emission. Simulated low calorific value gas made from natural gas diluted with argon can be burned with low NOx emission.

Original languageEnglish
Pages (from-to)2877-2882
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume67
Issue number663
Publication statusPublished - 2001 Nov

Fingerprint

high temperature air
boilers
Boilers
Demonstrations
Calorific value
Air
furnaces
Furnaces
waste heat
Temperature
thermodynamic efficiency
exhaust gases
gasification
natural gas
Waste heat utilization
Exhaust gases
Gases
Gasification
gases
coal

Keywords

  • Boiler
  • Diffusion combustion
  • Heat transfer
  • High temperature air combustion
  • Waste heat recovery

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

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abstract = "A new concept compact boiler using high temperature air is proposed and experimental demonstration is done. In the boiler, high temperature air combustion is realized. Fuel can be efficiently burned by high temperature preheated air of about 800°C∼1 000°C under low oxygen content (∼5{\%}). The temperature distribution in the furnace is very uniform and there is no hot spot, so that low NO.v emission (∼40 ppm) and relatively high .average temperature in the furnace can be achieved. Thermal efficiency of more than 90{\%} is accomplished including waste heat recovery of exhaust gas. This boiler is useful to partial load operation, because the response of thermal output is linear. This boiler is also suitable for low calorific value gas derived from gasification process of coal and wastes with no dioxin emission. Simulated low calorific value gas made from natural gas diluted with argon can be burned with low NOx emission.",
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AB - A new concept compact boiler using high temperature air is proposed and experimental demonstration is done. In the boiler, high temperature air combustion is realized. Fuel can be efficiently burned by high temperature preheated air of about 800°C∼1 000°C under low oxygen content (∼5%). The temperature distribution in the furnace is very uniform and there is no hot spot, so that low NO.v emission (∼40 ppm) and relatively high .average temperature in the furnace can be achieved. Thermal efficiency of more than 90% is accomplished including waste heat recovery of exhaust gas. This boiler is useful to partial load operation, because the response of thermal output is linear. This boiler is also suitable for low calorific value gas derived from gasification process of coal and wastes with no dioxin emission. Simulated low calorific value gas made from natural gas diluted with argon can be burned with low NOx emission.

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