Product Description
AIXBOILER, a leading A-GRADE boiler manufacturer in China with over 45 years of expertise since 1978, offers the DZH series manual biomass/coal fired boilers. This horizontal three-pass design uses a hand-fed moving grate (manual stoker) for economical operation, suitable for solid fuels like lump coal, firewood, biomass briquettes, wood logs, and agricultural waste.
Manufactured in our advanced facility in Taikang Industrial Park, Zhoukou City, Henan Province—the “Hometown of Boilers”—the DZH series features a movable grate for easy manual fuel addition and ash removal, threaded fire tubes for improved heat transfer, and arched tube sheets for durability. Ideal for small-scale or budget-conscious applications where full automation is not required.
Supporting sustainability, AIXBOILER DZH boilers accommodate biomass fuels for lower carbon emissions and utilize basic dedusting for cleaner operation. Exported to over 80 countries, they provide reliable performance in areas with limited automation needs.
Key Features and Benefits
- Manual Hand-Fed Operation → Low-cost, simple fuel loading via front door.
- Moving Grate Design → Manual adjustment for better combustion control and ash discharge.
- Fuel Versatility → Suited for irregular-shaped solid fuels like wood logs or lump coal.
- Compact Packaged → Easy transport and quick installation.
- Cost-Effective → Lower initial investment than automatic models.
- Reliable Structure → Three-pass wet-back for efficiency and longevity.
Technical Parameters
The table summarizes typical specifications for AIXBOILER DZH manual biomass/coal fired boilers (steam/hot water; custom available):
| Parameter | Specification Range | Notes / Standard Models |
|---|---|---|
| Rated Steam Capacity | 0.5 t/h – 6 t/h | Common: 1 – 4 t/h |
| Rated Thermal Power (Hot Water) | 0.35 MW – 4.2 MW | For smaller heating needs |
| Rated Working Pressure | 0.7 MPa – 1.6 MPa | Low to medium pressure |
| Steam Temperature | 170°C – 184°C | Saturated steam standard |
| Thermal Efficiency | 78% – 85% | With basic economizer |
| Fuel Type | Lump Coal, Firewood, Biomass Briquettes/Logs | Hand-fed irregular fuels |
| Grate Type | Manual Moving Grate (Hand-Fired Stoker) | Front loading door |
| Control System | Basic Gauge + Optional Semi-Auto | Manual firing with safety interlocks |
| Heating Surface | 30 – 200 m² | Threaded tubes for convection |
| Dimensions (approx.) | Varies (e.g., 3m – 7m length) | Compact horizontal |
| Weight (dry) | 5 tons – 25 tons | Easy site handling |
| Emissions | Dust ≤ 80 mg/Nm³ | With simple cyclone deduster |
These parameters offer affordable, robust performance for manual operations.
Additional views of manual grate mechanisms and hand-fed designs:
Design and Construction Standards
AIXBOILER DZH boilers comply with:
- Primary Standards: GB/T 16507 (China), optional CE
- Materials: Boiler-grade steel with threaded tubes
- Welding & Inspection: 100% NDT, hydrostatic testing
- Accessories: Basic economizer, cyclone deduster, manual tools
Built for simple, hands-on operation and maintenance.
Applications
AIXBOILER DZH manual biomass/coal fired boilers are suitable for:
- Small factories (food, textiles, garments)
- Rural or remote heating/steam needs
- Agricultural processing (drying, curing)
- Workshops and small laundries
- Areas with low labor costs for manual feeding
- Biomass firewood or lump coal users
They provide basic, dependable heat from affordable solid fuels.
Quality Assurance and Testing
Each boiler undergoes:
- Pressure and combustion testing
- Grate movement and safety checks
- Full NDT and third-party certification (TUV, SGS, BV optional)
- Basic commissioning guidance
Ensuring safe, straightforward operation.
Why Choose AIXBOILER?
With family expertise since 1978, government designation in 2025, and over 60 senior engineers, AIXBOILER offers economical DZH manual solutions. We provide full services: fuel consultation, custom adaptation, manufacturing, installation support, and 24/7 maintenance for reliable, low-cost solid fuel heating worldwide.
The DZH Manual Biomass/Coal Boiler, manufactured by AIX Boiler, a Chinese A-grade producer since 1976, is a horizontal, single-drum, fire-tube boiler designed for manual feeding of biomass or coal to produce steam or hot water for industrial applications. Its efficient combustion system achieves thermal efficiency up to 85%, reducing fuel costs. The robust design ensures durability, with simple operation suited for small-scale industries like textiles, food processing, and agriculture. With low emissions, it meets environmental standards, offering a cost-effective, eco-friendly heating solution with reliable performance.
Specifications
| Item/ Model | DZH0.5-T | DZH1-T | DZH2-T | DZH4-T | DZH6-T | |
| Capacity | kg of steam per hour | 500 | 1000 | 2000 | 4000 | 6000 |
| HP | 32 | 64 | 128 | 256 | 384 | |
| Pressure | Bar | ≤10 | ≤10 | ≤13 | ≤16 | ≤16 |
| Steam Temperature | ℃ | ≤184 | ≤184 | ≤194 | ≤204 | ≤204 |
| Available Fuels | / | Wood pieces, Firewood Logs, Sawdust, Biomass pellet, Coal, Bagasse, Grain shell, Nuts shell, Palm shell, etc. | ||||
| Thermal Efficiency | % | ＞80 | ||||
| Combustion Method | / | Fixed chain type chamber burning, Manual fuel feeding, Manual ash removing | ||||
| Dimension | mm | 3228×2000×2656 | 4108×2200×2915 | 4700×2300×3270 | 5600×2550×3563 | 6300×2750×3750 |
| Weight | kg | 8000 | 12000 | 15000 | 22000 | 28500 |
- Hot
- High Quality Control: In manufacturing processes, we has adopting steel strength test, automatic steel cutting/ plate rolling/ welding, 100% x-ray welding check, magnetic particle check c-scan ultrasonography check, fluorescent penetrating check, hydraulic (water) pressure test, boiler thermal efficiency test,etc, to make sure all finished products is qualified.
- Simple Structure: DZH boiler adopting threaded fire tubes, single water drum, horizontal shell type boiler with 3 fire-passes structure, water-tube fire-tube mix design. Most important, the combustion fixed chain grate can also suit any kind of biomass. The small flakes chain grate can reduce fuel leakage, and also let the broken chain grate flakes is convenience of replace.
- Better Adaptability on Fuels: Comparing with DZL boiler, DZH boiler has better adaptability on fuels, it can fire coal, rice husk, nut shell, sawdust, waste wood pieces, also can fire wood logs, straws. But, DZH boiler can only support manual fuel feeding, and manual ash remove.
- Safe Operation: DZH series is equipped with automatic water-level control, automatic pressure control, automatic interlock chain stop protection, free settable working pressure, visible system’s working states on screen.