Adjustable Porosity Silicone Carbide Filter Sticks Filter Tube for Water Impurities

1. Introduction of Silicone Carbide Filter tube:

Silicon Carbide (SiC) filter tubes are high-performance ceramic filtration components designed for extreme operating conditions. They are renowned for their exceptional thermal stability, mechanical strength, and corrosion resistance. These properties make them the preferred choice for hot gas filtration, molten metal filtration, and various other demanding industrial applications where traditional metal or polymer filters would fail.

2. Material Properties of Silicon Carbide Filter tube:

The outstanding performance of SiC filter tubes stems from the intrinsic properties of the silicon carbide material:

• Exceptional Thermal Stability & High-Temperature Resistance: SiC filters can operate continuously at temperatures up to 1,600°C in oxidizing atmospheres and even higher in inert or reducing environments. They resist thermal shock, meaning they can withstand rapid temperature changes without cracking.
• Superior Mechanical Strength: They possess very high compressive strength and good three-point bending strength, allowing them to withstand significant pressure differentials and mechanical loads during operation and back-pulse cleaning.
• Excellent Chemical Inertness & Corrosion Resistance: Silicon carbide is highly resistant to attack by acids, alkalis, and molten metals, making it suitable for highly corrosive environments.
• High Hardness & Wear Resistance: SiC is one of the hardest materials available, providing excellent resistance to abrasive particles in gas or liquid streams.
• Controlled Porosity & High Filtration Efficiency: The tubes are manufactured with a tailored pore size distribution, typically in the range of micrometers, enabling high-efficiency separation of fine particulate matter.
• Long Service Life: The combination of these properties results in a filter element that lasts significantly longer than alternatives, reducing downtime and maintenance costs.

3. Working Principle

SiC filter tubes operate on the principle of surface filtration.

• Filtration Cycle: The contaminated fluid (gas or liquid) flows from the outside of the tube to the inside. Particulate matter is trapped on the outer surface of the tube, forming a "filter cake," while the clean fluid passes through the porous SiC wall and exits from the inner bore.
• Cleaning Cycle (for gas filters): Over time, the accumulated filter cake increases the pressure drop across the filter. To regenerate the filter, a short, high-pressure pulse of compressed air or gas is injected in the reverse direction (from the inside out). This pulse dislodges the filter cake, which falls into a hopper below for disposal. The porous structure of the SiC tube itself remains clean and ready for the next filtration cycle.

 Main Types of SiC Filter Tube:

• Recrystallized Silicon Carbide (RSiC): Produced by sintering SiC grains at very high temperatures without the addition of sintering aids. This results in a pure, high-purity material with excellent high-temperature resistance and chemical purity, ideal for the most demanding applications.
• Sintered Silicon Carbide (SSiC): Sintered with the aid of additives, which allows for sintering at lower temperatures. SSiC tubes often exhibit even higher mechanical strength and can be manufactured with very precise and uniform pore sizes.
• Clay-Bonded Silicon Carbide: Contains a clay binder, which makes them more cost-effective but with slightly lower temperature resistance and chemical stability compared to RSiC and SSiC. Often used for molten metal filtration.

Advantages of Silicone Carbide Filter tube:

• Reliability in Harsh Conditions: Unmatched performance in high-temperature, high-pressure, and corrosive environments.
• High Filtration Efficiency: Can remove sub-micron particles, ensuring high product purity and meeting strict environmental emission standards.
• Durability and Long Life: Resistant to thermal shock, chemical attack, and mechanical wear, leading to a long operational lifespan and a lower total cost of ownership.
• Easy Regeneration: The rigid structure allows for highly effective back-pulse cleaning, maintaining a stable, low pressure drop over thousands of cycles.
• Increased Process Efficiency: In applications like coal gasification or waste incineration, they enable higher operating temperatures, which improves energy recovery and process efficiency.

6. Primary Applications

Hot Gas Filtration:

• Coal Gasification & Syngas Production: Cleaning raw syngas for use in turbines or chemical synthesis.
• Waste Incineration: Removing fly ash and harmful particulates (e.g., dioxins, heavy metals) from flue gases.
• Cement & Lime Kilns: Filtering kiln exhaust gases.
  

Biomass Gasification & Pyrolysis.

Molten Metal Filtration:

Foundries: Used in ceramic filters for aluminum, iron, and steel casting to remove non-metallic inclusions (slag, oxides), dramatically improving the quality and mechanical properties of the final cast

product.

Chemical & Petrochemical Industry:

Filtration of corrosive chemicals, catalysts, and polymers.

Environmental Protection:

Advanced filtration for dust collection in extreme conditions.  

  
Technical Data