Manufacturing wear-resistant and corrosion-resistant silicon carbide spiral vortex nozzles

Silicon carbide is a green crystal with a Mohs hardness between 9.2 and 9.3, a melting point of 1627°C, a specific gravity of 3.19 g/m³, and properties such as semiconductor grinding, wear resistance, high-temperature resistance, non-reactivity with strong acids and alkalis, and strong radiation resistance. Silicon carbide is extremely hard and is widely used as an abrasive and grinding agent for hard materials such as machinery and hard ceramics. It is used in the production of other silicides, as well as in wear-resistant components like bearings, nozzles, grinding wheels, and engine parts. It serves as an abrasive enhancer in composite materials and has extensive applications in aerospace, aviation, nuclear energy, and other fields. Additionally, silicon carbide is a special welding material and refractory material. The natural bulk density of silicon carbide abrasives ranges from 1.2 to 1.6 g/mm³, with a specific gravity of 3.20–3.25. Green silicon carbide is primarily produced from petroleum coke and silica, with the addition of salt as a raw material. Spiral Nozzle The silicon carbide spiral nozzle is a distinctive type among various nozzles. As the spiral body continuously tapers, the slurry changes direction along the spiral tangent and collides, forming a sheet-like spray into a concentric conical shape. The liquid flows unobstructed from the nozzle cavity inlet to the outlet. It maintains high absorption efficiency even at very low operating pressures, earning widespread recognition in desulfurization systems. The silicon carbide large-flow nozzle, also known as the reaction-sintered silicon carbide desulfurization nozzle, is a key component in desulfurization and dust removal systems for thermal power plants and large boilers. Domestically produced reaction-sintered silicon carbide desulfurization and dust removal nozzles are gradually replacing imported products, offering high strength, high hardness, resistance to strong corrosion, severe wear, and high temperatures, with an ultra-long service life under harsh conditions. Double Hollow Cone Tangential Nozzle Silicon carbide nozzles are a new type of ceramic material characterized by high-temperature resistance, oxidation resistance, high strength, resistance to extreme cold and heat, excellent thermal shock resistance, minimal high-temperature shrinkage, good thermal conductivity, wear resistance, and corrosion resistance. Silicon carbide nozzles are used in power plant desulfurization to remove sulfur dioxide and other pollutants from flue gas. Both coal-fired power plant flue gas and gas from integrated coal gasification combined cycles share the common task of desulfurization and denitrification (as well as dust removal). Flue gas emitted from power plants without desulfurization and denitrification directly pollutes the atmospheric environment, while untreated gas in combined cycles can damage the hot-end components of gas turbines, and their exhaust also pollutes the environment. Components made from silicon carbide are increasingly used in power generation, papermaking, petroleum, chemical industry, mechanical seals, water pumps, surface treatment, heat exchange, mineral processing, aerospace, and other fields. The double hollow cone tangential nozzle, used in desulfurization towers, features one nozzle spraying upward and another spraying downward to provide a uniform spray distribution. It can also be designed with different liquid flow rates for the upper and lower spray holes, such as 80% upward and 20% downward. Hollow Cone Tangential Nozzle Limestone slurry enters the vortex chamber of the nozzle tangentially and is ejected from the spray hole at a right angle to the inlet direction. The nozzle is integrally formed by injection molding with no internal separation components. The maximum particle size that can freely pass through the nozzle is approximately 80% of the spray hole size, with multiple angle and flow rate options. It offers high strength, high hardness, resistance to strong corrosion, severe wear, and high temperatures, with an ultra-long service life under harsh conditions. Silicon carbide nozzles are used in power plant desulfurization to remove sulfur dioxide and other pollutants from flue gas. Both coal-fired power plant flue gas and gas from integrated coal gasification combined cycles share the common task of desulfurization and denitrification (as well as dust removal). Flue gas emitted from power plants without desulfurization and denitrification directly pollutes the atmospheric environment, while untreated gas in combined cycles can damage the hot-end components of gas turbines, and their exhaust also pollutes the environment.