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  • Biomass
  • Biomass
  • Biomass
  • Biomass

Biomass Pellet Water Tube Steam Boiler

  • Steam Capacity 2t/h~30t/h
  • Steam Pressure 0.7Mpa-3.8Mpa
  • Fuel Biomass pellet, wood pellet, bagasse, rice husk, straw, coconut shell, cotton seeds, etc.
  • Application wood processing, food & beverage, farm, textile plant, rice mill, paper processing, hospital, hotel, diaries, schools, etc.
  • Certification ISO9001,CE,BV, SGS

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Biomass pellet fired water tube steam boiler is horizontal type double drums water tube boiler with high steam quality, the combustion equipment is chain grate. Sitong boiler takes several breakthroughs on boiler design, such as membrane water cooling wall, low thermal inertia design, and water cooling combustion chamber. This biomass pellet steam boiler adopts fast assembly or packaged assembly structure, boiler with steam capacity lower than 4t/h is fast assembly water tube structure, boiler with steam capacity between 6~25t/h is consisted of upper part (boiler heated part) and lower part (combustion equipment). This series boiler has reached the international advanced level on technology and performance, it has the advantages of compact structure, high steam quality, sufficient output, operate convenient and environmental protection. 

The biomass pellet fired water tube steam boiler is wide adaptability of different biomass fuels, such as wood pellet, bagasse, rice husk, straw, coconut shell, cotton seeds, corncob, peanut shell, waste cloth, etc. To avoid coking and improve combustion efficiency, adopts unique double secondary air design, to improve conditions of biomass fuel.

Characteristics of Chain Grate

1)The small scale chain grate boiler could resist the temperature as high as 1200℃, long working life.

2)The chain grate has a low biomass fuel leakage because of the small gap.
3)Mechanized feed, high automatic degree, decrease labor cost.
4)Convenient for maintenance, it could be done without boiler shut down.
5)Based on customers’ requirement and fuel characteristics, the grate could be designed as reciprocal grate.

Products Advantages
1. High Quality Assurance

1) There is a professional design engineer team, before manufacturing, every boiler design drawing have to be approved by boiler and pressure vessel experts of CSBTS ( State Bureau of Quality Technical Supervision ), and then the boiler could be produced only if qualified.
2) To ensure the raw materials quality, all the steel plates are special-used for boiler with the Inspection Certificates. The raw material materials are inspected when entering factory, and only the qualified material could be put in storage and used for production.
3) To ensure the welding quality, there a professional welding team, including more than 30 senior welders. The welding materials are stored under constant temperature and humidity, to ensure the welding material quality.
4) The welding quality will be further examined during boiler manufacturing, by using x-ray detection, ultrasonic flaw detection, magnetic test, or penetration test, etc.
5) To ensure the boiler quality, the leakproofness and strength of pressure parts will be tested. The hydrostatic test is done to make sure there are no water drop or water mist leakage appear on steal wall or welding joint, no water leakage appear at the place of expansion, and no obvious residual deformation and abnormal situation.
6) To ensure no problems before boiler delivery, all the raw materials and boilers are supervised and inspected by the experts of Inspection Institution for Boiler and Pressure Vessel. There are international uality certificates of ISO 9001 and CE, we can also offer the inspection report of SGS, BV, etc., Quality Certificates, Energy audit report, and Energy Efficiency Test Report, etc.
2. Safety Assurance

3. High Efficiency Assurance

4. Professional Installation and After-sale Team
1) Professional engineer installation team offer the door to door installation and after sale service. The boilers will operate smoothly and safety, and you will get them without worries.
2) 24 hours hot-line to solve your problems, and offer the professional technical supports and after sale service in time to all over the world.
5. Convenient Maintenance
1) The chain grate is convenient for maintenance, it could be done without boiler shut down.
2) There are manhole, head hole, and special hand hole on the boiler, convenient for boiler internal installation, inspection and clean.
Combustion Process

The front boiler body is arranged around with water cooled wall, the upper part is connected with upper drum, the downpart is connected with header, to consist the combustion chamber. To absorb the furnace radiant heat sufficiently, there is intensive convection tube bundle between the upper drum and lower drum.

The biomass pellet fuel drop down at the front of grate from fuel hopper, move with the chain grate, after preheat dry distillation, combustion, and burnout, the slag fall into slag hopper, and then removed outside the boiler. The high temperature smoke gas flow through the convection heating surface, economizer, dust remover in order, and finally discharged into the atmosphere by induced draft fan through chimney.


Model Steam Capacity
Working Pressure
Thermal Efficiency
Body Heating Area
Coal Consumption
Overall Dimension
L×W×H (m)
SZL4-1.20/1.6/2.5-T 4 1.25/1.6/2.5 81 99.5 591 7.46×2.65×3.52 32
SZL6-1.20/1.6/2.5-T 6 1.25/1.6/2.5 81 134 884 7×2.7×3.5 21
SZL10-1.20/1.6/2.5-T 10 1.25/1.6/2.5 81 233.6 1443 7.89×3.26×3.53 28
SZL15-1.20/1.6/2.5-T 15 1.25/1.6/2.5 82 310.5 2157 10×3.2×3.5 30
SZL20-1.20/1.6/2.5-T 20 1.25/1.6/2.5 82 478 2866 11×3.2×3.5 35
Note: 1. Parameter is for reference only, if any changes should follow the factory technical data.
2. Our company can design boiler products based on customers’ requirement and different biomass pellet fuels.
Transaction Process
Customer Inquiry -- Offer Professional Consulting Service -- Place Order -- Customize Boiler Based on Customers’ needs --Production-manufacturing -- Payment -- Impeccable After Sale Service (installation and debugging, periodic maintenance, etc.)

Offered Technical Documentations
Installment and Operation Instruction
Quality Certificate
Inspection Certificate of Boiler quality
General Drawing of Boiler
Foundation Drawing
Boiler Body Drawing
Boiler Room Design Drawing
Drawing of Valves, Instruments and Accessories

Company Strength
Sitong boiler is a national approved and designated enterprise, with design and manufacture license permits of Class A boiler and D1, D2 pressure vessel. The company has passed ISO 9001 international quality system certification, and gained the international certificates of CE, SGS, and BV, etc. The boiler products are exported to more than 60 countries. The factory covers an area of 120 thousands㎡, equipped with plenty of international advanced manufacture equipment, such as CNC cutting machine, automatic submerged arc welding machine, X-ray detection machine, etc.
company strength of Sitong Boiler


Contact us now if you have any question about our company and products[email protected]. Any of your inquiry and suggestion will be highly appreciated. We will keep your information completely private.