China Sulfur Combustion Device Factory & Products

Sulfur sublimation occurs when unoxidized liquid sulfur vapor slips through cold boundary layers without mixing with sufficient oxygen. Ruitu eliminates sublimation via three design layers: First, precision mechanical atomization reduces molten sulfur droplet size to below 50 μm. Second, a cyclonic combustion chamber configuration promotes intense turbulent vortex mixing between the atomized spray and preheated air. Third, the combustion zone length is sized to guarantee a gas residence time exceeding 1.8 seconds at temperatures consistently above 1000°C, ensuring virtually 100% conversion into SO₂.

Under regular operational conditions with steady-state thermal cycling, Ruitu sulfur furnace linings operate reliably for 5 to 8 years before major overhauls. We utilize an engineered composite refractory architecture: the hot-face layer contacting high-temperature corrosive gas is composed of low-iron, high-alumina bricks (>72% Al₂O₃) or dense corundum-mullite castables with exceptional spalling resistance. Behind this dense barrier, we apply lightweight insulating firebricks and high-temperature microporous calcium silicate boards to maintain outer steel shell temperatures below 70°C.

In bromine extraction projects utilizing the SO₂ reduction route, elemental bromine blown out from chlorinated bitter brine or seawater must be chemically reduced to hydrobromic acid (HBr) for capture. The sulfur combustion unit serves as the continuous source of high-purity SO₂ gas. This SO₂ gas is cooled via heat exchanger or waste heat boiler and metered into the absorption tower where it reacts with bromine and water vapor: Br₂ + SO₂ + 2H₂O → 2HBr + H₂SO₄. Ruitu's DCS automatically synchronizes the sulfur feed rate to match the incoming bromine concentration in real time.

Yes. While direct combustion requires molten sulfur to atomize cleanly through the burner, our complete turnkey plant designs incorporate an automated sulfur melting and filtration station. Solid sulfur (whether lump, prill, or flake) is fed into a steam-jacketed melting pit equipped with heating coils and high-shear agitators. The molten sulfur is then pumped through leaf filters to extract ash and bitumen impurities before being transferred into the sulfur furnace holding tank.

Our sulfur burning systems are governed by a fail-safe Safety Instrumented System (SIS) meeting SIL-2/SIL-3 standards. Key safety interlocks include: dual ultraviolet (UV) flame detectors, primary combustion air low-pressure trip, molten sulfur high/low-temperature interlocks, downstream pressure relief bypasses, and nitrogen purge automated sequencing. If flame failure or power disruption occurs, pneumatic spring-return shutoff valves immediately isolate the liquid sulfur supply within 0.8 seconds, followed by automatic nitrogen purge cycles.

To provide an accurate technical proposal and budget estimate, our engineering team requires: (1) Target sulfur burning capacity (kg/hr or tons/day), (2) Desired SO₂ gas concentration (vol %) and discharge pressure, (3) Downstream process type (bromine extraction, sulfuric acid, sugar de-colorization, mineral leaching), (4) Available plant site utilities (steam pressure, cooling water flow, power supply voltage/frequency), (5) Preferred degree of heat recovery (steam generation vs water quenching), and (6) Local environmental discharge emission limits.