Spreader Stoker Coal‑Fired Boiler for Paper Mill – Reliable Steam Generation
Our spreader stoker coal fired boiler for paper mill delivers consistent, high‑temperature steam essential for pulp drying, press operations, and heat‑recovery loops. Engineered for continuous‑duty service, the unit combines a robust spreader‑stoker combustion system with a compact, low‑maintenance design that fits the spatial constraints of modern paper‑production facilities. Whether you are upgrading an existing plant or building a new line, this boiler provides the thermal efficiency and reliability demanded by today’s paper manufacturers.
Why This Boiler Stands Apart
- Optimised fuel distribution – The spreader‑stoker ensures uniform coal spread across the combustion chamber, reducing hotspots and extending refractory life.
- High duty‑cycle capability – Designed for 24/7 operation with minimal downtime, perfect for the continuous processes of paper production.
- Compact footprint – Integrated water‑wall and economiser layout saves floor space without compromising output.
- Low emissions – Advanced over‑fire air control and soot‑blowing automation keep NOx and particulate levels within stringent environmental limits.
- Easy integration – Standardised inlet/outlet connections and optional PLC‑ready control panels simplify retro‑fits to existing plant utilities.
Typical Specifications (customizable per order)
| Parameter | Range / Value |
|---|---|
| Steam Capacity (ton/h) | 3 – 25 |
| Operating Pressure (kPa g) | 150 – 400 |
| Design Temperature (°C) | 420 – 480 |
| Fuel Type | Bituminous coal, sub‑bituminous, processed coal blends |
| Efficiency (ISO 3046) | ≥ 86 % (net) |
| Duty Cycle | Continuous (≥ 95 % availability) |
| Control System | Optional DCS/PLC with remote monitoring |
Where It Excels – Application Scenarios
Paper mills demand steam at multiple pressure levels for drying presses, condensate recovery, and auxiliary heating. The spreader‑stoker design excels in:
- High‑temperature drying of tissue and newsprint webs, where rapid heat transfer shortens line speed bottlenecks.
- Steam generation for large‑scale evaporators in kraft recovery, supporting energy‑saving closed‑loop cycles.
- Supplemental heat for chemical recovery furnaces, reducing reliance on expensive natural gas.
- Backup steam supply during peak demand or grid outages, ensuring uninterrupted production.
Frequently Asked Questions
What is the minimum order quantity (MOQ) for a customized boiler?
We accept single‑unit orders for pilot‑scale projects and can scale up to multi‑unit packages for large plants. The MOQ is determined by the selected capacity range and any optional accessories.
Can the boiler be adapted to alternative solid fuels?
Yes. While the standard configuration is optimized for bituminous coal, we can re‑engineer the feed system, burner geometry, and ash handling to accommodate sub‑bituminous coal, processed coal blends, or even biomass‑coal mixes, subject to a technical review.
What is the typical lead time from order to shipment?
Standard models ship within 30–45 days after receipt of a signed purchase order and engineering drawing approval. Fully customized solutions may require 60–90 days, depending on design complexity and tooling.
What warranty and after‑sales support are provided?
All units come with a 12‑month comprehensive warranty covering material defects and workmanship. We also offer optional extended service contracts, on‑site commissioning, and a 24/7 spare‑parts hotline to minimise downtime.