What Is a Silicon Carbide Spiral Nozzle?
A silicon carbide spiral nozzle is a ceramic spray nozzle with an open spiral flow path that forms a full-cone spray pattern for gas washing, slurry scrubbing, quenching and desulfurization systems. It is commonly selected for FGD absorbers and industrial scrubbers where abrasive particles, acidic liquids, chloride-containing media and thermal fluctuation can shorten the service life of metal or plastic spray nozzles.
Dimensions of Silicon Carbide Spiral Nozzle
| Spiral Flow Silicon Carbide Nozzle | ||||||
| Model | Inch | Thread Size (mm) | Atomization Angle | Flow Rate Range (m³/h) | Coverage Diameter (m) | Connection Method |
| AT-THG-LW001 | 3/8 inch | 18 | 120° | 2.5 | 0.8 | Threaded |
| AT-THG-LW002 | 1/2 inch | 20 | 120° | 4 | 1 | Threaded |
| AT-THG-LW003 | 3/4 inch | 25 | 120° | 6 | 1.2 | Threaded |
| AT-THG-LW004 | 1 inch | 32 | 120° | 12 | 1.4 | Bonding/Threaded |
| AT-THG-LW005 | 1.2 inch | 40 | 120° | 15 | 1.6 | Bonding/Threaded |
| AT-THG-LW006 | 1.5 inch | 46 | 120° | 20 | 1.8 | Bonding/Threaded |
| AT-THG-LW007 | 2 inch | 58 | 120° | 30 | 2.3 | Bonding/Threaded |
| AT-THG-LW008 | 2.5 inch | 73 | 120° | 45 | 2.3 | Bonding/Threaded |
| AT-THG-LW009 | 3 inch | Bonding | 120° | 70 | 2.8 | Bonding |
| AT-THG-LW010 | 4 inch | Bonding | 120° | 100 | 3 | Bonding |
The values above are reference options for model selection. Final nozzle size, flow rate, connection type and spray coverage should be reviewed according to pump pressure, header layout, liquid density, suspended solids, tower diameter and required gas-liquid contact area.
Silicon Carbide Spiral Nozzle Properties
ADCERAX Silicon Carbide Spiral Nozzles are reviewed for hydraulic behaviour, corrosion resistance and structural stability under abrasive, corrosive and thermally fluctuating scrubber conditions.
| Property | Unit/condition | AD-SIC-RB (RBSiC/SiSiC) | AD-SIC-SS (SSiC) |
|---|---|---|---|
| Manufacturing route | — | Reaction bonding/silicon infiltration | Pressureless sintering |
| SiC content | wt% | 85 nominal | ≥99 |
| Residual free silicon | wt% | 15 nominal | None (SS ≠ zero-silicon or 100% purity) |
| Bulk density | g/cm³ | ≥3.02 | 3.10 typical |
| Apparent open porosity | vol% | ≤0.1 | <0.1 |
| Flexural strength | MPa at 20 °C | 250 | 380 |
| Compressive strength | MPa | / | ≥2600 |
| Young’s modulus | GPa | 330 at 20 °C | 420 |
| Poisson’s ratio | — | / | 0.16 |
| Thermal conductivity | W/(m·K) | 45 at 1200 °C | 100–120 (room-temperature selection reference) |
| Application-temperature ceiling | °C | 1380 | 1600 |
| Hot flexural strength | MPa | 280 at 1200 °C | / |
| Hot Young’s modulus | GPa | 300 at 1200 °C | / |
Why Silicon Carbide Spiral Nozzles Are Used in Scrubber Systems
- Open Spiral Flow Path for Slurry Handling
The spiral flow path does not rely on narrow internal vanes, which helps reduce blockage risk when the liquid contains gypsum, fly ash, mineral particles or scale-forming solids. This makes the nozzle suitable for wet FGD and industrial gas-washing systems where slurry cleanliness may vary during operation. - SiC Wear Resistance for Abrasive Spray Media
Silicon carbide offers high hardness and strong erosion resistance, helping the nozzle maintain its spray geometry when exposed to abrasive slurry or dust-contaminated liquid circuits. This supports more predictable spray coverage between inspection cycles. - Corrosion and Thermal Stability in Harsh Gas Treatment
RBSiC / SiSiC ceramic materials provide stable performance in acidic, alkaline and chloride-containing scrubber environments. Their thermal stability also helps the nozzle withstand temperature changes in quench zones and gas-cooling sections.
How to Choose the Right Silicon Carbide Spiral Nozzle
Confirm installation fit and spray performance together. The nozzle must match the existing equipment and deliver the required spray under actual operating conditions.
1. Confirm the Installation Fit
- Check the interfaces: Connection type, connection face, engagement depth and installed length must match the header.
- For replacements: Provide the old part or a dimensioned drawing so the replacement can be reviewed against the existing installation.
2. Define the Spray Requirements
- Provide the operating point: Required flow per nozzle, pressure drop across the nozzle, spray distance and coverage.
- Use the correct pressure: Specify the nozzle’s differential pressure rather than pump discharge pressure alone. Review flow and coverage at that condition.
3. Check the Liquid and Solids
- Particle clearance: Compare the minimum clear passage with the largest particles in the liquid or slurry.
- Material compatibility: Review the fluid chemistry and operating conditions when selecting the SiC material route, including abrasion and corrosion exposure.
4. Review the Customization Options
- Geometry: Overall length, passage dimensions and connection features can be reviewed for the installation.
- Mounting: Threaded, bonded or drawing-based configurations may be considered where a standard model does not fit. Any geometry change should also be checked against the spray requirements.
5. Agree the Inspection Requirements
- Dimensional acceptance: Confirm the drawing revision and inspection points before production.
- Spray verification: Where required, include the test conditions, method, sampling and acceptance criteria in the order.
Packaging Instructions for Silicon Carbide Spiral Nozzle
Silicon Carbide Spiral Nozzle is packaged using dense shock-absorbing foam blocks to secure the spiral structure and prevent vibration-related chipping during transport. Each nozzle is individually seated in a precision-cut cavity to avoid surface contact and ensure stability throughout international shipping. The outer carton is reinforced to withstand stacking loads and maintain the integrity of the ceramic component until final installation.
