What are the differences between single-stage, dual-stage, and proportional-regulation burners based on their operating mode?
According to operation mode, burners are divided into single-stage burners, dual-stage burners, and proportional-regulation burners. The differences between them are as follows:
- Single-stage burner:
The single-stage burner is the same size as the fire.The intensity and size of the fire are not changed, only the state of starting and stopping. Single-stage burners are suitable for heating industries that require low temperature or pressure control, and allow for significant temperature or pressure errors.
Generally, most of the burners with a power of less than 600KW (50,000 kcal) are single-stage burners.
- Dual-stage burner:
The working mode of the dual-stage burner is small fire high fire, which starts with the small fire and ignites the large fire after it stabilizes. That is to say, the burner has two working points, which can operate either under the first combustion stage (small fire) or the second combustion stage (large fire).There are three states of high fire, small fire, and stopping. The small fire is used to keep warm; the large fire is used to heat. Dual-stage burners are suitable for heating industries that require high temperature or pressure control, with temperature errors of 10°-20° permitted.
Most of the burners with a power greater than 600KW (50,000 kcal) are dual-stage burners.
- Proportion-regulation burner:
Proportion-regulation burners also start with the small fire and operate according to the required proportion.The number of working points is not limited, and the fire intensity and size of the fire can be switched within the power range. This burner is similar to a limitless number of knobs. Proportion-regulation burners are extremely precise in temperature and pressure control, and are almost in a stable state.For example, if the temperature is set to 100°, the proportional-regulation burner will always be within ±1° (between 99° or 101°) of that temperature. The range, and adjust the burner's fire intensity.
Proportion-regulation burners can be divided into mechanical proportional-regulation and electronic proportional-regulation.Mechanical proportional-regulation burners use servo motor driving mechanical linkage control of fuel and air flow rate; electronic proportional-regulation burners have two dedicated servo motor, independently controlled fuel and air flow rate. Currently, all low-nitrogen combustion appliances required by the national standard are electronic proportional-regulation burners.