SWSI Centrifugal Fan Dust Collector Fan Alternating Current Fluidized Bed Boiler Use

This article's table of contents introduction:

1. The Most Likely Application: Ash Handling & Pneumatic Conveying
2. Technical Specifications (Typical for this application)
3. Alternative Interpretation: The "Fluidized Bed" Fan itself
4. Summary for Selection

It appears you are listing a set of keywords related to industrial machinery. Based on the most common technical configurations, here is the breakdown of how these components typically relate to one another, specifically for Fluidized Bed Boilers (CFB/BFB) .

The Most Likely Application: Ash Handling & Pneumatic Conveying

In a Fluidized Bed Boiler (FBC), the bed material (sand and ash) must be circulated and collected. The SWSI Centrifugal Fan (Single Width, Single Inlet) is frequently used as an Alternating Current (AC) driven induced draft fan or a secondary air fan for the Dust Collector (baghouse or cyclone).

Here is the specific relationship:

• Fluidized Bed Boiler: Requires high-pressure air to suspend fuel (fluidization).
• Dust Collector Fan (SWSI): After combustion, flue gas passes through the baghouse. The SWSI fan (driven by an AC motor) pulls the gas through the filter bags, cleaning the exhaust.
• Purpose: The fan creates the negative pressure required to extract fine ash from the boiler flue gas and convey it to the silo.

Technical Specifications (Typical for this application)

If you are selecting a fan for this purpose, here are the critical parameters an engineer would need:

• Type: SWSI (Single Width, Single Inlet) – Often preferred over double inlet due to higher pressure capabilities for dense phase conveying.
• Drive: AC Induction Motor (Variable Frequency Drive (VFD) is common for turndown control).
• Application: Induced Draft (ID) for Dust Collector, or Primary Air (PA) for fluidization.
• Key Features for FBC Boilers:
  • Abrasion Resistance: Fly ash from FBC boilers is highly abrasive. Fans must have wear liners (hard-faced or ceramic) on the blades and housing.
  • High Temperature: Flue gas temperatures can reach 150°C–250°C. Fan shaft seals and bearings must be rated for this.
  • Particle Handling: The fan must be designed to handle dust-laden air without excessive erosion.

Alternative Interpretation: The "Fluidized Bed" Fan itself

If you are not referring to the dust collector, but rather the Primary Air Fan for the boiler bed:

• You: "I need a fan for the boiler."
• Fan: The SWSI Centrifugal Fan provides the high static pressure (typically 600–1000 mmWG) required to fluidize the bed of sand and fuel.
• Dust Collector: In this case, the cyclone separator (a type of dust collector) is usually placed after the boiler but before the fan to protect the fan blades from erosion.

Summary for Selection

To ensure the correct fan, please confirm:

1. Is this for the Suction side (ID Fan) or Pressure side (PA Fan)?
2. What is the temperature at the fan inlet? (Critical for safety)
3. What is the dust load? (Measured in g/Nm³)
4. Is the fan horizontal or vertical shaft? (SWSI usually horizontal for this use)

Most likely answer to your implied question: "A SWSI Centrifugal Fan, powered by an AC motor, is used as the Induced Draft fan to pull combustion gases from a Fluidized Bed Boiler through the baghouse Dust Collector."