pulverized coal burner with adjustable duct outlet area

The pulverized coal burner mainly consists of piping system, nozzle group, butterfly valve regulator, metal corrugated compensator, pressure monitoring device and fire-resistant protection layer, and each air duct outlet is equipped with adjustable function to realize flexible and precise air distribution.

Depending on the model, the coal feeding capacity of a single burner ranges from 1.2 tons per hour to 6.5 tons per hour, which can be matched to the rotary kiln with a diameter of 1.9 m to 4.0 m. It is widely used in many industrial production lines.

Characteristics of pulverized coal burner:

1. Multi-duct composite structure (axial wind, coal wind, cyclone wind, center wind), the air volume can be independently adjusted
2. The main body of the equipment is made of heat-resistant steel, the front end is high temperature resistant, and the tail end can be equipped with refractory castable material.
3. With oil gun channel, support auxiliary fuel ignition
4. Adapt to a variety of coal types, including poor quality coal, low volatile coal and anthracite.
5. Complete models to meet the needs of different sizes and working conditions

Advantages of pulverized coal burner:

1. Stable and complete flame shape, flame size, strength and weakness can be adjusted online, accurately match the kiln needs
2. High combustion efficiency, high fuel utilization, significantly reduce energy consumption
3. Reduce nitrogen oxide (NOx) emissions, help to meet environmental standards
4. Strong adaptability, a wide range of fuel types, suitable for production lines with frequent fluctuations in coal quality
5. Easy operation, flexible adjustment of air volume and flame, easy maintenance, high operational reliability.

Working principle of pulverized coal burner:

The pulverized coal burner realizes the full combustion of pulverized coal through the synergistic effect of four winds. The pulverized coal is sprayed into the kiln from the burner with the help of coal wind, and the cyclone wind cuts in at a certain angle, so that the pulverized coal is fully dispersed and uniformly distributed in the airflow to enhance the combustion reaction. The axial wind concentrates the flame, ensures strong flame closing and improves thermal efficiency; the central wind further stabilizes the flame core and enhances combustion stability.

In the operation process, the operator can adjust the butterfly valve of each duct to flexibly control the flame length and thickness:

1. Increase the cyclone wind, improve the flame expansion.
2. Adjust the axial flow wind, control the flame length.
3. Expansion and contraction of the center duct, fine-tuning the flame shape and stability.
4. The three winds dynamically cooperate to accelerate the ignition and complete combustion of pulverized coal, to ensure uniform temperature distribution in the kiln and improve thermal efficiency.

Application areas:

1. Building materials industry: cement plant rotary kiln, lime kiln
2. Metallurgical industry: iron and steel plant heating furnace, pellet roasting
3. Electric power industry: coal-fired boiler auxiliary combustion
4. Chemical industry: coal gasifier, drying equipment
5. Other fields: glass kiln, ceramic firing kiln

Fuel adaptability and environmental performance, so that it has become a lot of industrial high-temperature thermal process equipment.