3/5 Pass Skid Mounted Smoke Cum Water Tube Boiler

Design and Construction:

• Hybrid Design: Combines smoke (fire) tube and water tube heat transfer in one unit flue gas passes through smoke tubes while additional surface area in the water-tube section extracts further heat, aiding steam generation.
• 3/5 Pass Configuration: Flue gas changes direction and re-passes through the heat-transfer surfaces three or five times before exiting, increasing contact time with the tube banks compared with a single-pass design.
• Skid Mounted Package: Shell, tubes, and major fittings are shop-assembled on a base frame, which is intended to reduce on-site erection time and transport complexity compared with field-erected boilers.

 

Efficiency and Performance:

• Multi-Pass Heat Recovery: The hybrid design and multiple passes are intended to maximize heat transfer from the flue gas before it exits.
• Rapid Steam Production: The combined smoke-tube/water-tube arrangement is built to respond quickly to steam demand.
• Optimized Heat Distribution: Aims for even heat distribution across the tube banks, reducing thermal stress on the pressure parts.

Emission Control:

• Emissions Management: Can be configured with low NOx burners and other combustion controls to help meet applicable emission regulations for the project.
• Pollution Control Equipment: Can be integrated with flue gas cleaning systems such as dust collectors, bag filters, wet scrubbers, urea dosing systems, limestone dosing systems, and electrostatic precipitators, selected per fuel type and regulatory requirement.

 

Customization and Scalability:

• Modular and Customizable: Capacity, pressure, and additional features can be adapted to project requirements through engineering.
• Scalable Design: Suited to different applications across the boiler's capacity range.

 

Economic Considerations:

• Operating Costs: Fuel flexibility and multi-pass heat recovery are intended to support lower operating costs relative to less efficient single-pass designs.
• Installation Costs: The skid-mounted package is intended to reduce on-site installation time and cost versus field-erected alternatives.
• Lifecycle Value: Built for durable operation across the boiler's service life.

 

Regulatory Compliance:

• Standards Referenced: Designed with reference to standards such as ASME, IBR, and PED, with exact certification scope confirmed per project and buyer requirement.
• Regular Inspections: Subject to periodic inspection and audit in line with applicable safety and efficiency norms.

 

 

 

 

Frequently Asked Questions About 3/5 Pass Skid Mounted Package Smoke Cum Water Tube Boiler

1. What is a 3/5 Pass Skid Mounted Package Smoke Cum Water Tube Boiler?

It is a horizontal, solid-fuel-fired steam boiler that combines smoke-tube and water-tube heat-transfer sections, arranged for either 3-pass or 5-pass flue gas flow, and delivered as a pre-assembled skid-mounted package. It is built for capacities up to 12 TPH and pressures up to 14 kg/cm² (ksc).

 

2. How does a smoke cum water tube boiler work?

Solid fuel burns in the furnace, producing hot flue gas. The gas travels through smoke-tube and water-tube sections across multiple passes, transferring heat to the surrounding boiler water at each pass. This generates steam, which is drawn off for plant use while cooled flue gas exits toward the stack or emission-control equipment.

 

3. What is the difference between a 3-pass and 5-pass boiler?

The number refers to how many times flue gas changes direction and passes back through the boiler's heat-transfer surfaces before exiting. A 5-pass design routes gas through two additional passes compared with a 3-pass design, increasing contact time with heat-transfer surfaces.

 

4. What fuels can be used in this solid fuel fired package boiler?

The boiler is designed for low ash content solid fuel, and can potentially run on coal, biomass, agro-waste, or biomass pellets. Actual fuel suitability depends on ash content, moisture, calorific value, and the combustion system selected for the specific order.

 

5. What is the capacity of this boiler?

This boiler platform is offered for capacities up to 12 TPH. The exact capacity for an order is determined by the plant's steam demand and confirmed during engineering.

 

6. What operating pressure is available?

The boiler is designed for operating pressures up to 14 kg/cm² (ksc). Exact working pressure is finalized based on the buyer's process requirements.

 

7. What are the advantages of a skid-mounted boiler?

Because the boiler is pre-assembled on a base frame at the factory, on-site erection work is generally reduced compared with field-erected boilers, which can simplify transport planning and shorten time to commissioning.

 

8. Which industries use smoke cum water tube boilers?

Industries with process steam requirements typically use this boiler, including food processing, pharmaceuticals, chemical processing, manufacturing, and power/heating applications.