[특허]Automatic combustion control apparatus and method

[미국특허] Automatic combustion control apparatus and method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F23N-001/02
출원번호	US-0618706 (1984-06-08)
발명자 / 주소	Adams James (Highland Heights OH) Belin Felix (Mayfield Heights OH)
출원인 / 주소	Republic Steel Corporation (Cleveland OH 02)
인용정보	피인용 횟수 : 16 인용 특허 : 10

초록 ▼

A method and apparatus for controlling the combustion of multiple fuels, especially fuels having diverse combustion air requirements. A heating rate demand signal indicative of the heating rate desired is generated and is compared with a fuel based fuel heating rate signal. The larger of the two signals is selected to be an air demand signal that serves as set point for a combustion air controller. The flow rates of each of the fuels being burned is monitored and the resulting signals are scaled and summed to produce the heating rate signal. The fuel signals are also scaled by factors reflecting the combustion air requirements of the fuels. The signals are summed and combined with the fuel heating rate signal to produce a feedforward signal which in turn is combined with a signal reflecting the measured combustion air flow to produce an equivalent air heating rate signal. This latter signal is communicated to the combustion air controller and if different than the air demand signal causes an adjustment of the combustion air controller. The equivalent air signal is also compared with the heat demand signal and the lower of these two signals is communicated to a fuel heating demand subsystem which controls the metering of the fuels. An 02 set point generator modifies the feedforward signal should a deviation occur between the 02 set point and the measured 02 content of flue gas exhausted by the combustion process.

대표청구항 ▼

For a combustion process using multiple fuels having diverse combustion air requirements, a method for controlling the fuel-to-air ratio, comprising the steps of: (a) generating a heating rate demand signal indicative of the amount of heating required; (b) measuring the current fuel flow rate for each fuel being burned and generating a fuel heating rate signal indicative of the heating capacity of said fuels; (c) generating individual fuel demand signals in a fuel heating rate demand development subsystem; (d) adjusting the flow of individual fuels in response to their individual demand signal; (e) generating an air requirement signal for measured fuel flows and their air requirements; (f) generating a feedforward signal related to said air requirement signal; (g) comparing said heating rate demand signal with said fuel heating rate signal and communicating the higher of said signals to a combustion air flow controller; (h) adjusting said air controller in response to said communicated signal; (i) measuring the actual air flow; (j) generating an equivalent air heating rate signal which is a function of the measured air flow and said feedforward signal; and, (k) comparing said equivalent air heating rate signal with said heating rate demand signal and communicating the lower of said signals to said fuel heating rate demand development subsystem. Apparatus for controlling the combustion of multiple fuels having diverse excess air requirements, comprising: (a) means for generating a heating rate demand signal; (b) sensors for monitoring the flow rates of fuels being burned; (c) scaling means for converting signals received from said sensors to signals representing the heating value per unit time of each of said fuels; (d) first summing means for summing said signals to arrive at a gross fuel heating rate signal; (e) other scaling means for converting said sensed signals to signals representing the theoretical air required per unit time for each of said fuels; (f) other summing means for summing said signals; (g) means for generating a feedforward signal as a function of the fuel mixture being burned and the heating values of said fuels; (h) multiplying means for combining said feedforward signal with a signal representing the measured combustion air flow to produce an equivalent air heating rate signal; (i) a low select comparator for comparing said heating rate signal with said equivalent air heating rate signal, said low select comparator operative to selectively communicate the lower of heating rate demand and equivalent to a fuel demand development subsystem; (j) a high select comparator for generating an air demand signal for communication to a combustion air controller, said high select comparator operative to select the higher of said heating rate demand signal and said gross heating rate signal; and (k) continuously recalibrated cross-limiting means for limiting the fuel flow rates to the available combustion air and for assuring sufficient combustion air for the measured fuel flows.

이 특허에 인용된 특허 (10) 인용/피인용 타임라인 분석

Ikemoto Zenichi (Akashi JPX) Nishimura Masaru (Kobe JPX), Automatic fuel combustion control method and system.
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Martz Lyle F. (Penn Hills PA), Boiler control providing improved operation with fuels having variable heating values.
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Fujii Katsumasa (Tokyo JPX) Takeda Naoshi (Fuchu JPX), Boiler feed water pump control systems.
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Bryan Edward L. (Dallas TX), Furnace monitoring system.
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Sun James H. (Homewood IL), Heater damper controller.
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Womack ; John W., Means and method for controlling excess air inflow.
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Shigemura Michael S. (Cupertino CA), Method and apparatus for control of efficiency of combustion in a furnace.
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Turek, David G.; Wysk, Stanley R., Method and apparatus for controlling secondary air distribution to a multiple fuel combustor.
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Ball Donald H. (Bartlesville OK) Voelkers James D. (Bartlesville OK), Process control method and apparatus.
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Stewart ; William S., Process control method and apparatus.
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이 특허를 인용한 특허 (16) 인용/피인용 타임라인 분석

Fan, Junqiang; Lelic, Muhidin A., Automated setup process for metered combustion control systems.
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Zabielski Martin E. (Manchester CT), Combustion control.
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Widmer, Neil Colin; Payne, Roy; Seeker, William Randall; Gauthier, Philippe Jean, Combustion optimization for fossil fuel fired boilers.
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Ohtsubo Yutaka,JPX ; Urasaki Kazuaki,JPX ; Tasaka Yoshiro,JPX ; Hisano Atushi,JPX, Fuzzy controller for selecting an input signal.
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Cameron, Andrew M.; Visconti, Kelly T., Heating apparatus.
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Cain, Bruce E.; Robertson, Thomas F.; Newby, John N., Low NOx combustion method and apparatus.
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Foley Patrick J. (86 Hillsdale Ames IA 50010), Means and method of optimizing efficiency of furnaces, boilers, combustion ovens and stoves, and the like.
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Ballard Gary W. (Indianapolis IN) Thompson Kevin D. (Indianapolis IN), Method for providing variable output gas-fired furnace with a constant temperature rise and efficiency.
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Dempsey Daniel J. (Carmel IN) Thompson Kevin D. (Indianapolis IN), Method of operating a natural gas furnace with propane.
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Rennie, John Duncan; Pettigrew, Scott Rusheon; Hamilton, Barbara Kerr; Bishop, Andrea Nicole, Methods and apparatus to control combustion process systems.
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Takeuchi Kunihiko (Kawasaki JPX) Baba Fujio (Tokyo JPX) Shimomura Yasuo (Tokyo JPX) Morishige Yuji (Funabashi JPX), Set point change-over circuit for fluid control valves.
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Johnson Ralph K. (Highland Heights OH) Kaya Azmi (Akron OH) Keyes ; IV Marion A. (Chagrin Falls OH) Moss William H. (Kingwood TX), Steam generator on-line efficiency monitor.
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Andersen, Viggo S.o slashed.ren; Hansen, Peter Pors Jessen, Stove for solid fuel.
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Besore, John K.; Beyerle, Michael Thomas; Worthington, Timothy Dale; Brian, Joseph Mark, Submetering hydrocarbon fueled water heaters with energy manager systems.
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Loeven, II, Robert J., Systems and methods for controlling fuel mixing.
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Schultz,Paul Clarence, Systems and methods for determining the existence of a visible plume from the chimney of a facility burning carbon-based fuels.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Automatic combustion control apparatus and method 원문보기

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