Liquid heaters and vaporizers – Regulation – Fuel and water
Patent
1985-06-10
1986-11-18
Yuen, Henry C.
Liquid heaters and vaporizers
Regulation
Fuel and water
122 4D, 431 10, 110347, 110190, 110185, F22B 3742
Patent
active
046229221
ABSTRACT:
A combustion control method wherein manipulated variables or the amounts of fuel and air in at least one combustion zone of a boiler are regulated so that both the amount of nitrogen oxides and the amount of unburned coal in the ash at an outlet of a burner furnace or at least one of them passes the regulation standards and satisfies the requirements for operating a plant. The method is characterized by varying the amounts of fuel and air in performing trial operations on manipulated variables to evaluate the nitrogen oxides at the furnace outlet, the unburned coal in the ash at the furnace outlet and the stability of combustion, and declaring as optimum manipulated variables those amounts of fuel and air used for performing the trial operations which achieve results such that the combustion is found to be stabilized, at least the nitrogen oxides at the furnace outlet satisfy the requirement and the thermal efficiency of the boiler is judged to be at the highest level by a boiler thermal efficiency judging section.
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patent: 4368031 (1983-01-01), Chadshay
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patent: 4424754 (1984-01-01), Coleman et al.
patent: 4528918 (1985-07-01), Sato et al.
Higashi Toshihiko
Kurihara Nobuo
Miyagaki Hisanori
Morooka Yasuo
Nishikawa Mitsuyo
Hitachi , Ltd.
Yuen Henry C.
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