The four-channel burner literally means four channels, from the inside to the outside: 1. Central wind; 2. Coal or coal gas channel; 3. Swirl wind; 4. External wind. The working principle is as follows: the pulverized coal is blown into the kiln by the pulverized coal jet blower, the central air pipe shrinks to adjust the thickness of the flame, and the swirling air rotates the pulverized coal in a certain direction to disperse the pulverized coal to atomize and fully burn the pulverized coal. The outside wind is direct current, which can gather the divergent fire shape and realize the flame shape desired by the customer. The pulverized coal channel is a separate fan, and the remaining three channels are all primary air control, which can be adjusted with valves as needed. After adjustment and fixation, do not easily adjust again. But at the same time, we need to pay attention to the importance of the secondary air. When adjusting the primary air, we must ensure the secondary air volume. Usually the ratio is that the primary air accounts for 10%-15% of the total combustion, and the rest is the secondary air. supplement. Since the secondary air generally enters after the cooling tube, the secondary air is hot air, which can effectively improve the combustion quality and efficiency.
Its characteristics are as follows:
1. Flame hood: The bowl-shaped effect is formed and the flame has no strong vortex phenomenon, thereby avoiding temperature peaks, making the flame temperature distribution uniform and reasonable, and effectively protecting the kiln mouth cylinder and guard plate.
2. Long service life: The heat-resistant steel of the burner head is made of special material, which is resistant to high temperature and abrasion.
3. The flame is regular: the advanced arrangement of the air ducts can make the pulverized coal burn more fully and the flame is more regular and powerful;
4. Convenient on-line adjustment of flame length: In addition to adjusting the air volume of axial flow and swirling wind, the cross-sectional area of the outlet of the swirling wind can also be adjusted to achieve the purpose of changing the outlet wind speed of the burner and ensure the normal combustion of fuel;
5. Strong adaptability of coal quality: it can burn a variety of solid fuels such as bituminous coal, anthracite, low-quality coal, petroleum coke, etc.;
6. New products: lower pollutant emissions, full mixing of pulverized coal and combustion-supporting air, making combustion faster and more complete, reducing the content of CO and NOX, so as to achieve the effect of energy saving and environmental protection.
