Combustion optimization system

• US 5,794,549 A
• Filed: 01/25/1996
• Issued: 08/18/1998
• Est. Priority Date: 01/25/1996
• Status: Expired due to Term

• Current Assignee: Diamond Power International Incorporated (Babcock International Group PLC)
• Original Assignee: Applied Synergistics, Inc.
• Inventors: Carter, Hudson R.
• Primary Examiner(s): Price, Carl D.
• Assistant Examiner(s): Ciric, Ljiljana V.
• Application Number:
  US08/591,012
• Time in Patent Office: 936 Days
• Field of Search: 110/185, 110/186, 110/187, 110/188, 110/189, 110/190, 110/191, 110/234, 110/260, 110/261, 110/263, 110/297, 110/347, 110/348, 110/341, 236/15 BA, 236/15 BB, 236/15 BD, 236/DIG. 15, 432/36, 432/50, 431/13, 431/14, 431/18, 431/75, 431/12, 356/45, 356/315, 356/316
• US Class Current: 110/347
• CPC Class Codes: F23M 11/045 by observing the flame
• CPC Class Codes: F23N 2223/08 Microprocessor; Microcomputer
• CPC Class Codes: F23N 2229/20 Camera viewing
• CPC Class Codes: F23N 2231/20 Warning devices
• CPC Class Codes: F23N 5/082 using electronic means

Abstract

Information relating to combustion conditions within a fossil-fueled boiler that includes a plurality of burners adapted to produce flames combining to form a fireball is provided by acquiring data relating to the physical and temperature characteristics of the fireball with at least one imaging camera having optical and temperature measuring capabilities; receiving, storing and processing data received from the camera to provide data representative of the NO_x content of the hot gases produced by the fireball; and transmitting the processed data from the processor to a monitor for display. Transmitted, processed data may include current, historical and target information relating to the physical appearance and temperature profile of the fireball.

Claims

1. A system for providing information relating to combustion conditions within a fossil-fueled boiler that includes a side wall, a furnace section, a plurality of burners positioned in a substantially horizontal plane and adapted to produce flames combining to form a fireball within said furnace section, and an observation port located in the boiler side wall above the furnace section, said system comprising:

a) at least one imaging camera having optical and temperature measuring capabilities, said camera being positioned outside of said boiler and directed downwardly to view a major portion of the upper surface of said fireball through said port and provide data representative of the shape, position, and temperature distribution of said fireball;

b) a processor connected to said camera to receive, store and process data received from said camera and to provide data representative of the NO_x content of hot gases produced by the fireball; and

(c) a monitor connected to said processor to receive and display data from the processor.

2. The system according to claim 1, further including a mount supporting said camera.

3. The system according to claim 1, further including at least one air/fuel control element connected to said processor for controlling the air/fuel ratio of said fossil-fueled boiler.

4. The system according to claim 1, wherein said processor is capable of displaying current and historical data on said monitor.

5. The system according to claim 1, wherein said fossil-fueled boiler is a pulverized coal boiler.

6. A system for providing information relating to combustion conditions within a fossil-fueled boiler that includes a side wall, a furnace section a plurality of burners positioned in a substantially horizontal plane and adapted to produce flames combining to form a fireball within said furnace section and an observation port located in the boiler side wall above the furnace section, said system comprising:

a) at least one imaging camera having optical and temperature measuring capabilities, said camera being positioned outside of said boiler and directed downwardly to view a major portion of the upper surface of said fireball through said port and provide data representative of the shape, position, and temperature distribution of said fireball;

b) a processor connected to said camera to receive, store and process data received from said camera, and transmit current, historical and target information relating to the physical and temperature characteristics of said fireball;

c) at least one air/fuel control element connected to said processor to control the air/fuel ratio of said fossil-fueled boiler based upon said information transmitted by said processor; and

d) a monitor connected to said processor to receive and display said information transmitted by said processor.

7. A method for providing information relating to combustion conditions within a fossil-fueled boiler that includes a side wall, a furnace section, a plurality of burners positioned in a substantially horizontal plane and adapted to produce flames combining to form a fireball within said furnace section, and an observation port located in the boiler side wall above the furnace section, the method comprising:

a) positioning at least one imaging camera having optical and temperature measuring capabilities outside of said boiler and directed downwardly to view a major portion of the upper surface of said fireball through said port;

b) acquiring data representative of the shape position and temperature distribution of said fireball with said camera;

c) receiving, storing and processing said data to produce processed data representative of the NO_x content of hot gases produced by said fireball; and

(d) transmitting data to a monitor, and displaying data thereon.

8. The method of claim 7, wherein said camera is also positioned to view a portion of said wall in said furnace section.

9. The method of claim 7, wherein said processed data transmitted to said monitor includes current, historical and target information relating to the physical appearance and temperature profile of said fireball.

10. The method of claim 7, further including the step of controlling the air/fuel ratio of said fossil-fueled boiler.

11. The method of claim 7, wherein said processed data is displayed with target information relating to the physical appearance and temperature profile of said fireball.

12. The method of claim 7, wherein said processed data is displayed with historical information relating to the physical appearance and temperature profile of said fireball.