The metal fiber burner of the fully premixed condensing boiler is a fully premixed micro flame burner. With special metal fiber as the combustion surface, the combustion intensity can reach 2500kw/m2. This combustion technology is a new type of combustion technology gradually popularized and applied in recent years, and is widely used in different fields. According to the different output power, the flame has two basic modes. At low power output, the burner is in infrared radiation mode, and at high power output, the burner is in blue flame mode. When the power output is adjusted, the flame changes between these two modes.
The burner of the fully premixed condensing boiler is burned in the form of micro flame, so the flame is very small, the heating is uniform, and the high temperature at the upper end of the combustion chamber is basically eliminated. Therefore, the emission of nitrogen oxides is very low, which is an environmentally friendly combustion mode of Zui. The burner is fully premixed with fuel and air, and has accurate regulation and control to ensure the complete mixing of gas and air, so as to make combustion more fully. It is "outstanding" in the current combustion technology. The full premixed condensing boiler burner uses Fe Cr Al fiber as the combustion surface substrate, and its high temperature of Zui can reach 1300 ℃. Since it still has excellent soothing reaction performance and thermal strength above 1000 ℃, the metal fiber burner has high combustion efficiency, heat shock resistance, low pressure drop, safety without backfire, rapid reaction, small thermal inertia It has the advantages of fast cooling, durability and less harmful gas release. Compared with the traditional atmospheric combustion burner, it has the following characteristics: uniform combustion, high thermal efficiency, less harmful gas release, and reduced boiler volume.
1. High heat intensity and wide adjustment range
In the 1980s, foreign countries began to study metal fiber burners. When the excess air coefficient was 1.1-1.3, the combustion conditions were different under different surface heat intensities: when the surface heat intensity was 0.1-0.8W/mm2, it was in the form of surface combustion, and the surface burned red to 800-1000 ℃, which was an infrared ray; When the surface heat intensity reaches 0.9W/mm2, a blue flame will float on the surface, and when the surface heat intensity reaches 5W/mm2, the flame will not fall off. The metal fiber burner can also be made into the form of downward radiation.
2. The content of CO and NOX in combustion products is very low. Under high heat intensity (900 kW/m2), the content of CO is less than 40 pp m. NOX content is lower than 30ppm.
3. Porous metal fiber carrier ceramics The plate is firm, not afraid of cold water, has certain mechanical strength, and can be processed into any shape.
4. It has small thermal inertia and can be heated and cooled quickly.
5. Low noise.
6. Under the condition that the primary air is fully premixed (the excess air coefficient is 1.1-1.3), the device for cooling the head is not required.
Application: hot water boiler, drying equipment Industrial furnace cellar, engineering heating equipment.
