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Advantages of Silicon Carbide Nozzle Materials
Release time:
2022-06-29
Silicon carbide nozzle These nozzles are made from a new type of ceramic material—silicon carbide—and are primarily used in flue gas desulfurization systems at power plants. The nozzles come in two main types: spiral solid-cone nozzles and vortex hollow-cone nozzles. Silicon carbide nozzles, fabricated from this advanced ceramic material, boast numerous outstanding characteristics, including high-temperature resistance, antioxidant properties, exceptional strength, resistance to extreme cold and heat, excellent thermal shock resistance, low thermal expansion at high temperatures, good thermal conductivity, wear resistance, and corrosion resistance.
As an energy-efficient and refractory material, it is widely used in high-temperature kilns across various industries—including sanitary ceramics, daily-use porcelain, electrical porcelain, magnetic materials, microcrystalline stone, powder metallurgy, and steel heat treatment—as well as in a variety of components made from it. It is also increasingly being applied in power generation, as well as in fields such as papermaking, petroleum, chemical engineering, mechanical sealing, water pumps, surface treatment, heat exchange, mineral processing, and aerospace.
Characteristics of Silicon Carbide Nozzle Materials
Silicon carbide nozzle Silicon nitride used in these materials exhibits excellent high-temperature performance and can serve as a binder for silicon carbide products. Silicon nitride-bonded silicon carbide products are high-tech silicon carbide materials that have been developed over the past two decades. The production process is as follows: A mixture of silicon carbide particles is combined with 15% to 25% fine silicon powder. High-purity nitrogen gas is then introduced into a high-temperature furnace, and the nitridation sintering process is controlled according to a specific temperature and pressure profile. The silicon infiltrating into the nitrogen bonds the hard silicon carbide particles together, forming a dense network-like structure. As a result, silicon nitride-bonded silicon carbide products possess outstanding physicochemical properties and superior high-temperature performance. Given the characteristics of silicon nitride and silicon carbide materials, desulfurization nozzles primarily utilize two types of materials: 1. Silicon nitride-bonded silicon carbide; 2. Reaction-sintered carbon.
Features of Silicon Carbide Nozzles
Silicon carbide nozzles, manufactured through reaction-sintered silicon carbide tubes, exhibit excellent resistance to thermal shock, wear resistance, oxidation resistance, high strength, non-clogging, crack-free performance, long service life, and easy replacement. They are ideal burner components for roller kilns, tunnel kilns, and shuttle kilns used in industrial furnaces for ceramics, chemicals, glass, metallurgy, and other industries that utilize fuels such as natural gas, liquefied petroleum gas, coal gas, and diesel. These nozzles can effectively control temperature balance within the kiln.
Characteristics and Advantages of Silicon Carbide Nozzles in Operation
Silicon carbide high-flow nozzles, also known as vacuum-reactive-sintered silicon carbide desulfurization nozzles, are critical components in thermal power plants, large-scale boilers, and complete flue gas desulfurization and dust removal systems. Domestically produced reactive-sintered silicon carbide desulfurization and dust removal nozzles are gradually replacing imported products.
It simultaneously boasts excellent properties such as high strength, high hardness, strong corrosion resistance, wear resistance, and high-temperature tolerance, ensuring a long service life even under harsh conditions. The silicon carbide spiral nozzle stands out among numerous nozzle types. Featuring a continuous, fine spiral structure, the slurry is constantly cut tangentially, collides with the spiral threads, and then changes direction to form a sheet-like pattern, ultimately being sprayed into a concentric conical jet. The liquid enters the nozzle cavity and exits without encountering any channel obstructions. Even at extremely low operating pressures, this nozzle maintains high absorption efficiency and has thus gained widespread recognition in desulfurization systems.
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