Furnace structure and heat release requirements are the determining factors in the selection of the correct burner design.
Burners are fired by a wide range of gaseous and liquid fuels, and a variety of configurations are used throughout the industry. It is recommended that the designer take full advantage of all burner data available from vendors to gain a greater understanding of the operation and maintenance requirements of each design.
The combination oil and gas burner is shown below.
- It is designed to fire horizontally or vertically.
- Oil spillage in the radiant section cannot cause burner plugging.
- It burns any oil that can be pumped.
- It burns any fuel gas safely and quietly.
- All parts of the burner can be inspected closely while the burner is in operation.
Following diagram shows the maintenance area that must be provided when developing a layout for combination oil and gas burner.
By shutting off the oil and steam to the oil gun, the oil tip/atomizer assembly can be changed while the heater is in operation.
The windproof gas burner, shown below, is easy to light and fires in any position. It requires no combustion controls to maintain maximum efficiency. The burner may be straight or L-shaped, according to layout requirements.
Burners can be arranged in single or multiple rows and located in the roof, wall or floor as shown below. Many burners are operated and controlled through the use of burner management systems.
Burner Management System
Following figure shows a sample PID of a burner management system supplied by the burner vendor.
- The engineering contractor supplies the fuel gas to the burner skid and may be required to run the fuel gas and pilot gas to the individual burners.
- Following is a plan at grade of the burner management skid and control panel in relation to the furnace and burners.
- The skid is located directly in line with the furnace centreline to provide the most direct piping to the individual burners.
The burner management control panel is remotely located at a minimum of 60 ft (18 000 mm) from the furnace.
Plant operations personnel may ignite the burners from this panel by sending a spark to the igniter located at the pilot gas tip within the burner and activating the solenoid valves on the skid.