Silicon nitride ceramic exhaust hood

In modern industrial high-temperature exhaust gas treatment systems, equipment has long faced severe tests such as high-temperature oxidation, thermal corrosion, and severe thermal shock. Silicon nitride ceramic exhaust hood, as an advanced structural ceramic component, provides an indestructible “protective armor” for exhaust emission systems due to its excellent high temperature resistance, thermal shock resistance, and corrosion resistance. It can significantly extend the service life of core equipment and is a key component to ensure the continuous and stable operation of industrial production lines.

Product FAQ
Q: My exhaust treatment system is always damaged due to high temperature and corrosive gases. Can this product help me solve this problem?
Answer: Absolutely possible. The silicon nitride ceramic exhaust hood is specially designed for high temperatures above 800 ℃ and acidic/alkaline corrosive environments, which can effectively isolate heat flow and chemical erosion, and protect the internal metal structure.
Q: Our production line frequently starts and stops, and ordinary metal covers often crack. Can this ceramic cover withstand drastic temperature changes?
Answer: Yes. Silicon nitride material has an extremely low coefficient of thermal expansion and excellent thermal shock resistance. Even under high and low temperature rapid switching conditions, it can maintain structural integrity without cracking.
Q: Can this product be customized? My device installation space is limited.
Answer: We provide full-size customization services. We can accurately mold and produce according to the interface size and installation space of your device, whether it is a circular, square or irregular structure.

Product application areas
Silicon nitride ceramic exhaust hood is widely used in various high-energy consumption and high-temperature industrial scenarios:
-Metallurgical industry: blast furnace gas export system, hot blast furnace exhaust outlet.
-Petrochemical industry: catalytic cracking unit, high-temperature flue gas pipeline interface protection.
-Garbage/hazardous waste incineration: incinerator flue gas outlet, resistant to acidic gas corrosion.
-Special material calcination: inlet protection for kiln exhaust gas treatment equipment.

Core advantages of the product

1. Ultra high temperature resistance: Long term use can reach temperatures above 1200 ℃, maintaining high strength and stability even at high temperatures.
2. Excellent thermal shock resistance: able to withstand severe fluctuations in airflow temperature, avoiding cracking and failure caused by thermal stress.
3. Extremely strong corrosion resistance: It has extremely high chemical inertness to highly corrosive media such as sulfides and chloride ions, and will never rust.
4. High hardness and wear resistance: The surface hardness is second only to diamond, which can effectively resist the long-term erosion of particles in high-speed flue gas.
5. Structural integration molding: Using precision ceramic technology, it can be integrated into complex structures to reduce installation nodes and improve sealing.

Customization service for specifications and dimensions
We are well aware that each customer’s working conditions are unique. We provide one-stop customized services from drawing design to finished product delivery:
-Size range: Diameter from 100mm to 2000mm, length can be customized according to requirements.
-Shape support: straight tube, conical, flange integrated, special-shaped parts with observation holes, etc.
-Accuracy control: The dimensional tolerance of the installation fitting surface can be controlled within ± 0.1% to ensure seamless connection with the metal pipeline.
-Small batch trial production: Support sample trial production, confirm the effect before mass production, and reduce customer procurement risks.

Customer Application Cases
A large non-ferrous metal smelting enterprise
-Customer demand: The exhaust hood of the smelting furnace in this enterprise was originally made of heat-resistant stainless steel (310S). In the continuous high temperature and sulfur-containing flue gas environment of 1150 ℃, the metal hood undergoes severe deformation and corrosion perforation on average every 3 months, causing cold air to leak in, affecting the efficiency of the subsequent dust collection system, and frequent shutdowns and replacements seriously reduce production efficiency.
-Solution: We have customized a silicon nitride ceramic exhaust hood with thickened flange edges for it. In response to its narrow installation space, we have optimized the wall thickness structure, reducing weight while ensuring strength, and added a special stress buffering structure to adapt to the expansion of metal pipelines at high temperatures.
-Final effect:
-Extended lifespan: After 12 months of installation and use, the ceramic cover’s inner wall is as smooth as new, without any signs of corrosion or deformation. The expected service life can exceed 5 years.
-Benefit improvement: Completely solved the problem of unplanned downtime caused by exhaust hood damage, reducing annual equipment maintenance costs by about 700000 yuan.
-System optimization: Due to the fundamental improvement in sealing, the load of the subsequent bag filter has been significantly reduced, the exhaust temperature has become more stable, and the overall system energy consumption has decreased by 5%.

If you are looking for a long-term and effective solution to the problems of high-temperature exhaust corrosion and thermal shock cracking, please feel free to contact us at any time for technical support or sample testing. Whether it’s standard or irregular parts, we can tailor the most reliable “protective cover” for you. Consult now to get your customized procurement plan!

Brudeze Ceramics supplies and sells a wide range of high-quality quartz glass, including alumina ceramics, zirconia ceramics, silicon nitride ceramics, aluminum nitride ceramics, silicon carbide ceramics, boron carbide ceramics, bioceramics, machinable ceramics, etc. We can meet the customization requirements of various ceramic products.