Biomass Vertical Steam Boiler
Description
he Biomass Vertical Steam Boiler is an energy-saving and environmentally friendly thermal energy device that uses renewable biomass energy as its core fuel and features a vertical structure design specifically for generating high-pressure or low-pressure steam. This solid fuel steam boiler integrates modern boiler manufacturing technology with biomass combustion processes. Its core positioning is to replace traditional oil, gas, and coal-fired steam boilers, widely adaptable to steam needs in various fields such as industrial production, commercial heating, and public services. It boasts multiple advantages including environmental compliance, energy efficiency, compact structure, and ease of operation, making it a preferred equipment for responding to the "dual-carbon" policy and promoting clean energy substitution.
Working Principle and Structural Features
- Fuel Supply: Biomass pellets are quantitatively fed into the combustion chamber via a screw feeder.
- High-Efficiency Combustion: Staged combustion on the grate, enhanced turbulence with secondary air, achieving full oxidation.
- Thermal Energy Conversion: High-temperature flue gas is flushed through water-cooled wall tubes in a three-pass process, where water absorbs heat and vaporizes to generate steam.
- Steam-Water Separation: Built-in high-efficiency steam-water separator outputs clean steam with a dryness of ≥99%.
- Tail Gas Treatment: Flue gas is discharged in compliance with standards after dust removal and desulfurization; ash and slag automatically fall into the slag removal system.
- Vertical Boiler Shell/Drum: The Biomass Vertical Steam Boiler uses high-quality Q245R or Q345R boiler steel, with strong pressure resistance.
- Multi-Pass Flue/Water Pipes: Optimized design increases heat exchange area and improves thermal efficiency.
- Furnace and Combustion Chamber: Constructed with high-temperature resistant materials, providing excellent insulation performance.
- Automatic Feeding System: Equipped with a hopper, anti-backfire device, and variable frequency screw feeder.
- Control System: PLC intelligent control, touch screen operation, supports remote monitoring.
- Safety Accessories: Safety valve, pressure gauge, water level gauge, multiple protections against overpressure/overtemperature/water shortage.
- Dust Removal System: Ceramic multi-tube dust collector + bag filter or water film dust collector, meeting environmental standards.
Product parameters
|
Steam boiler models |
DZU/DZG 1 |
DZL/DZG 2 |
DZL/DZG 4 |
DZL/DZG 6 |
DZL/DZG 10 |
DZL/DZG 15 |
DZL/DZG 20 |
|
|
Rated Evaporation Capacity (t/h) |
1 |
2 |
4 |
6 |
10 |
15 |
20 |
|
|
Rated Working Pressure (MPa) |
0.7/1.0 |
1.25/1.6/2.5 |
1.25/1.6/2.5 |
1.25/1.6 |
1.25/1.6 |
1.25/1.6 |
1.25/1.6 |
|
|
Rated Steam Temperature (°C) |
170/184 |
193/204/226 |
193/204/226 |
193/204 |
193/204 |
193/204 |
193/204 |
|
|
Feedwater Temperature(°C) |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
|
|
Body Water Volume(m3) |
3.6 |
6.5 |
9.2 |
12.3 |
1.0/1.25 |
1.0/1.25 |
1.25 |
|
|
Design Thermal Efficiency (%) |
≥81 |
≥81 |
≥81 |
≥81 |
≥81 |
≥81 |
≥81 |
|
|
Applicable Fuel |
Category II bituminous coal |
Category II bituminous coal |
Category II bituminous coal |
Category II bituminous coal |
Category II bituminous coal |
Category II bituminous coal |
Category II bituminous coal |
|
|
Fuel Consumption (kg/h) |
167.9 |
327.1 |
654.2 |
981.3 |
1594.7 |
2392.0 |
3189.3 |
|
|
Maximum Transport Component Size (m) |
5.2×2.1×2.9 |
5.7×2.6×3.4 |
6.6×2.7×3.6 |
6.5×2.7×3.6 |
7.2×3.4×3.6 |
9.4×3.4×3.6 |
9.8×3.5×3.6 |
|
|
Maximum Transport Component Weight (t) |
13 |
21 |
27 |
25 |
33 |
42 |
27 |
|
|
Installation Dimensions (m) |
6.0×4.2×4.2 |
6.5×4.5×4.8 |
7.2×4.1×4.9 |
9.5×5.5×6.3 |
9.8×5.7×6.3 |
10.7×5.7×6.8 |
11×5.8×8.6 |
|
|
Exhaust fan |
Model |
GY1-11Right0° |
GY2-15Right0° |
YX9-35No.8CRight0° |
GY6-1Right0° |
GY10-15Right0° |
Y5-47 12DRight0° |
Y5-47 12.4Right0° |
|
Air volume(m3/h) |
3295-5100 |
5200-8500 |
8868-19342 |
14000-20000 |
26321-32138 |
33318-50356 |
36762-55561 |
|
|
Air pressure(Pa) |
2383-2079 |
3668-3020 |
2805-3041 |
3060-3320 |
3714-3802 |
3628-3393 |
3874-3619 |
|
|
Motor power(KW) |
5.5 |
11 |
18.5 |
30 |
55 |
75 |
90 |
|
|
Blower fan |
Model |
4-72-3.2ARight 225° |
GG2-11Right 225° |
T4-72 4.5Right 225° |
T4-72 5Right 225° |
GG10-1Right 225° |
G4-73 9DRight 225° |
G4-73 9DRight 225° |
|
Air volume(m3/h) |
1688-3517 |
3189-4130 |
5360-10288 |
7352-10249 |
10000-22500 |
23003-32079 |
23003-44128 |
|
|
Air pressure(Pa) |
792-1300 |
1578-1461 |
2582-1616 |
3195-2954 |
2690-1620 |
2668-2559 |
2668-1775 |
|
|
Motor power(KW) |
2.2 |
3 |
7.5 |
11 |
15 |
30 |
37 |
|
|
Water pump |
Model |
25W2.5-12 |
JGGC2.4-9×19 |
DG6-25×7 |
DG6-25×8 |
DG12-25×7 |
DG25-30×5 |
DG25-30×6 |
|
25W2.5-12 |
JGGC2.4-9×22 |
DG6-25×8 |
DG6-25×9 |
DG12-25×8 |
DG25-30×6 |
DG25-30×7 |
||
|
DG6-25×11 |
DG6-25×12 |
|||||||
|
Flow rate(m3/h) |
2.5 |
2.4/2.4/3.75 |
3.75-7.5 |
3.75-7.5 |
7.5-15 |
15-30 |
15-30 |
|
|
Head(m) |
120 |
152/176/280 |
175/200/300 |
200/250 |
175/200 |
150/180 |
180/210 |
|
|
Motor power(KW) |
3 |
3/3/15 |
7.5/11/15 |
11/15 |
15/15 |
22/30 |
30/30 |
|
|
Speed control box |
Model |
GL-5P |
GL-5P |
GL-5P |
GL-10P |
GL-16P |
GL-20P/II |
GL-20P/II |
|
Motor power(KW) |
0.55 |
0.55 |
0.55 |
0.75 |
1.1 |
1.5 |
1.5 |
|
|
Slag remover |
Model |
LXL-1 |
LXL-2 |
LXL-4 |
LXL-6 |
LXL-10 |
LXL-15 |
LXL-20 |
|
Motor power(KW) |
0.75 |
1.1 |
1.1 |
1.1 |
1.1 |
1.5 |
1.5 |
|
|
Dust collector model |
XD-1 |
XD-2 |
XD-4 |
XD-6 |
XD-10 |
XD-15 |
XD-20 |
|
Core Performance and Features
- High Efficiency and Energy Saving: The Biomass Vertical Steam Boiler features a vertical large furnace and multi-pass flue design, combined with optimized heat exchange surface arrangement, maximizing heat exchange area and efficiency. Its thermal efficiency is significantly higher than traditional boilers, saving 25%-30% of fuel. Some models are equipped with secondary oxygen supply and suspension combustion technology for more complete combustion.
- Environmentally Friendly and Clean: The fuel itself is a renewable resource with neutral carbon emissions. The boiler utilizes a multi-pass flue gas flow and built-in dust removal structure, enabling secondary combustion or settling of fine carbon particles and dust in the flue gas within the furnace, reducing the initial concentration of smoke and dust emissions at the source and meeting environmental protection requirements.
- Safe and Reliable: Designed and manufactured strictly according to national standards, using high-quality pressure vessel steel plates and professional welding processes. Equipped with multiple safety protections: mechanical safety valves, electronic overpressure protection, low water level protection, leakage protection, overheat protection, etc., ensuring foolproof operation.
- Intelligent and Convenient: An optional fully automatic control system enables one-button start/stop, automatic feeding, automatic ignition, automatic water supply, and automatic pressure regulation, significantly reducing labor intensity. The PLC and touchscreen interface make operation intuitive and simple.
- Flexible and Economical Fuel Supply: The design is compatible with both biomass fuel and coal, allowing users to choose flexibly based on local fuel costs and supply, effectively controlling operating costs. Natural ventilation models that do not require blowers or induced draft fans further save on electricity and noise.
Maintenance and Care Guidelines
|
Maintenance Cycle |
Maintenance Items |
Operating Points |
|
Daily |
Water level gauge flushing |
Open the drain valve and flush 1-2 times to prevent false water level readings. |
|
Weekly |
Safety valve discharge |
Manually lift the handle once to discharge, preventing valve core sticking. |
|
Ash Removal and Coking |
Clean burner nozzles, furnace lining, and flue ash deposits. |
|
|
Monthly |
Water Quality Testing |
Test boiler water alkalinity and hardness, and adjust blowdown and chemical dosage accordingly. |
|
Lubrication and Maintenance |
Apply grease to feeder and blower bearings. |
|
|
Quarterly |
Flue Cleaning |
Mechanical or chemical descaling to maintain heat exchange efficiency. |
|
Refractory Materials |
Inspect furnace refractory bricks/castables and repair cracks. |
|
|
Yearly |
Statutory Inspection |
Accept internal and external inspections of special equipment; safety valve calibration. |
|
Pressure-bearing components |
Non-destructive testing; wall thickness measurement; replacement of worn parts. |
Installation Requirements
- Site Preparation: A level concrete foundation, capable of bearing ≥ twice the weight of the equipment, with a reserved drainage ditch.
- Space Requirements: A safety distance of ≥1.5m above and a maintenance access of ≥0.8m on the sides.
- Pipeline Connections: Connect steam outlet, water inlet, drain outlet, and chimney outlet.
- Fuel Storage: Independent silo or warehouse, moisture-proof and fireproof, recommended storage capacity ≥3-7 days' worth.
- Electrical Installation: Independent distribution cabinet, grounding resistance ≤4Ω, equipped with voltage stabilization equipment.
Operating Procedures
A. Pre-Startup Preparation
Check Items: Confirm power supply, voltage, and water supply are normal; close the drain valve and open the water supply valve.
System Check: Check flue gas flow, furnace pressure, and water pump operation status.
Fuel Check: Ensure biomass fuel (wood chips, straw, etc.) is dry and free of impurities.
Safety Check: Check the sealing of gas pipeline interfaces and confirm the safety valve is functioning correctly.
B. Startup Operation
Pre-ignition: Close the gas valve for pre-ignition and confirm motor rotation.
Furnace Purging: Adjust airflow to ≥25% of rated value and purge the furnace for 5 minutes.
Ignition Startup: Start the automatic feeding system and combustion system.
Parameter Setting: Set steam pressure and temperature according to requirements.
C. Operation Monitoring
Automatic Operation: The boiler operates fully automatically, automatically adjusting fuel quantity according to load.
Parameter Monitoring: Monitor safety parameters such as pressure, water level, and flue gas temperature.
Regular Blowdown: Blow at least once a day.
D. Shutdown Operation
Stop Feeding: Turn off the automatic feeding system.
Cooling Down: Turn off the blower after the furnace temperature decreases.
Safe Shutdown: Turn off the power to each system in sequence.
FAQ
Q1: What is the thermal efficiency of the Biomass Vertical Steam Boiler?
A1: The thermal efficiency of the Biomass Vertical Steam Boiler is typically above 80%, with high-quality products reaching around 90%, making it more energy-efficient than traditional coal-fired boilers.
Q2: How environmentally friendly is the solid fuel steam boiler?
A2: Biomass fuel is a renewable energy source. The carbon dioxide released during combustion can be reabsorbed by plants, achieving a carbon cycle. With dust removal equipment, smoke and sulfur dioxide emissions meet national environmental standards.
Q3: What is the approximate lifespan of the solid fuel steam boiler?
A3: It has a long lifespan. The boiler body is made of high-quality materials, and the furnace interior is lined with high-temperature resistant refractory materials for protection. Wear parts are easy to replace, and the overall operation is stable and reliable, meeting long-term usage requirements.
Q4: How does the Biomass Vertical Steam Boiler work?
A4: Fuel burns on the grate, and the resulting high-temperature flue gas sequentially flows through the furnace drum and multiple layers of internal flue pipes or water pipes, transferring heat to the water inside the boiler drum to generate steam. The flue gas flow is optimized for full heat absorption.
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