If you’ve been shopping around for electric steam boiler manufacturers, you’ve probably noticed two things: lead times are stretching, and power tariffs don’t always play nice with continuous steam demand. That’s why many plant managers quietly evaluate a Plan B—high-efficiency solid-fuel units—to bridge electrification targets with practical production. I’ve spent the last decade talking to boiler rooms that run three shifts and can’t gamble on grid volatility. Honestly, the decision is rarely ideological; it’s a math-and-reliability thing.
Originating from Wuqiao, Hebei, China, this unit’s drum uses an arched tube sheet with spirally corrugated tubes—engineers like this because it resists tube-sheet cracking under thermal cycling. It’s not electric, true; but many customers say it’s the pragmatic complement while they phase in electrics line-by-line.
| Parameter | Spec (≈, real-world use may vary) |
|---|---|
| Model | Coal or biomass fired DZL automatic chain grate |
| Evaporation | ≈ 1–20 t/h |
| Pressure | 0.7–1.6 MPa (options up to ≈2.5 MPa) |
| Efficiency | ≈ 84–88% (biomass), 82–86% (coal) |
| Drum/Tubes | Arched tube sheet + spirally corrugated tubes |
| Fuel/Grate | Biomass or coal / automatic chain grate |
| Control | PLC with safety interlocks, auto feed & blowdown |
| Testing | Hydrostatic @ 1.5× design P; NDT on critical welds |
| Origin | Wuqiao, Hebei, China |
Materials typically include Q245R/Q345R boiler plate for the drum and 20G/SA-210C for tubes. Fabrication uses submerged-arc welding; membrane-wall sections keep heat flux stable. Every unit gets UT/RT on seam welds, hardness checks, and a factory hydro test (1.5× design pressure). Service life? Around 20+ years with proper water chemistry (think: conductivity, pH, and alkalinity under EN 12953 guidance).
- Mid-size cannery: 6 t/h DZL unit with agri-residue pellets; reported ≈35% CO₂ cut vs. baseline coal; payback ≈26 months.
- Textile dyeing house: 8 t/h chain grate, PLC control; steam stability improved during peak seasons; fewer tube-sheet issues thanks to corrugated tubes.
| Vendor | Core Tech | Typical Output | Certifications | Best For |
|---|---|---|---|---|
| YNBoilers (Hebei, CN) | DZL chain grate, biomass/coal | ≈1–20 t/h | ISO 9001; CE-like documentation | Industrial users bridging to electrics |
| Electric Specialist A | Resistance/electrode electric | ≈0.5–10 t/h | UL/CE, IEC 60204 compliance | Labs, pharma, urban plants |
| Hybrid Integrator B | Electric + gas/biomass hybrid | ≈1–15 t/h | ASME/PED, ISO 16528 | Sites phasing emissions by line |
Ask for ASME BPVC I or EN 12953 design alignment, material traceability (EN 10204 3.1), hydrostatic test reports, and IEC 60204 checks on control panels. Commissioning should include burner/grate tuning, O₂ trim (if equipped), blowdown scheduling, and a water-treatment SOP. Warranty tends to be 12 months; plan PM quarterly.
References