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Computerized Control System for Improved Combustion Efficiency

IP.com Disclosure Number: IPCOM000083725D
Original Publication Date: 1975-Jul-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 3 page(s) / 40K

Publishing Venue

IBM

Related People

Gulitz, L: AUTHOR [+6]

Abstract

A computerized combustion system has been developed to increase the combustion efficiency of single or multifired furnaces utilized by electric power companies, industrial and residential complexes. State of the art sensors employ one of or a combination of ultraviolet, visible and infrared sensitive devices for safety devices on industrial furnaces.

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Computerized Control System for Improved Combustion Efficiency

A computerized combustion system has been developed to increase the combustion efficiency of single or multifired furnaces utilized by electric power companies, industrial and residential complexes. State of the art sensors employ one of or a combination of ultraviolet, visible and infrared sensitive devices for safety devices on industrial furnaces.

The system described utilizes a television camera equipped with a silicon diode array target. This special purpose vidicon tube and camera for temperature monitoring is described more fully in U. S. Patent 3,718,757. Its spectral response peaks at 0.9 mu m which makes it ideal for oil fired furnaces. A direct feedback system is employed to adjust the air/fuel mixture for maximum combustion efficiency. This results in significant fuel savings.

As shown, the computerized system is comprised of the following subsystems; a television camera 10, equipped with a detector sensitive to the type of flame being monitored, infrared for oil and ultraviolet for gas flames; a television monitor 11, for viewing flame distribution; an electronic logic control unit 12, which contains the video analog-to-digital and digital-to-analog converters; a temperature calibration control, the scan control of the active sensor location; a digital computer 13, the conventional system sensors 14, for O(2), C(O), NO(x) etc., the air/fuel controller 15, an optical neutral density filter 16, and a temperature calibration system 18.

In operation, the control computer 13 digests information such as the ambient temperature, relative humidity, wind velocity, anticipated load requirements etc., and a decision is made to utilize the existing "fired" furnaces or start additional units. Since camera 10 is sensitive from the near ultraviolet to infrared wavelengths, it is utilized to sense the pilot light flame, start the main flame and determine the optimum air/fuel mixture for most economical operation.

If proper firing sequences are disturb...