SiC Burner Tip

Hofmann has designed and developed Burner Tip for Coal based power plant where life of burner can be increased drastically. These are the most wear prone equipment due to abrasion of high velocity coal movement at the discharge points at high temperature.  The hard faced surface of steel plates develop rough surface which increases eddy current to the coal laden stream, thus reducing the velocity of flow.  These eddy currents increases wear as the stream is not moving in laminar flow.  Also due to wear out of baffle plates in the tip the distribution of the coal is also reduced and coal moves in lumps resulting in improper burning and thus reducing efficiency.

The above problem can be avoided in case of Burner Tip lined with SiC – 871.  SiC has smooth surface and it it design in such way that it remains free float in Steel body and therefore warpage can be avoided at high temperature due to difference in thermal expansion of steel and SiC.  SiC-871 retains its hardness at very high temperature as encountered in firing zone of boilers and thus it is the best material under such working condition.  The Baffle plates made of SiC are excellent in Erosion wear at high temperature and they support in proper distribution of coal for optimum firing for long time.  The higher life of the SiC reduces the frequency of shut down and thus production loss in shut down.

Silicon carbide materials exhibit good erosion and abrasive resistance; these properties can be utilized in a variety of applications such as spray nozzles, shot blast nozzles and cyclone components. Silicon carbide ceramics for plant components for extreme wear high temperature and thermal shock.

Silicon Carbide Ceramics have properties of High thermal conductivity, low thermal expansion coefficient, outstanding thermal shock resistance, extreme hardness, semiconductor and refractive index greater than a diamond. The benefits of Silicon Carbide Ceramics are: its operating temperature is higher than most wear resistant ceramics, casting allows for complex shape production. The chemical inertness makes them ideal for making valves and seals exposed to severe corrosive and abrasive conditions.