---
title: "IR rotary sootblower"
description: "An IR rotary sootblower is a short, fixed-position rotating steam lance with permanently-installed nozzles. Unlike the IK long-retract design, the IR lance does not withdraw between operations — it rotates in place, projecting steam onto adjacent tube banks within its rotation radius."
canonical_url: "https://sylio.co/glossary/ir-rotary-sootblower"
last_updated: "2026-06-28T02:29:23.572Z"
---

An **IR rotary sootblower** is a short, fixed-position rotating steam lance with permanently-installed nozzles. Unlike the [IK long-retract design](/glossary/ik-long-retract-sootblower), the IR lance does not withdraw between operations — it rotates in place, projecting steam onto adjacent tube banks within its rotation radius.

## Typical applications

- [Air heater](/glossary/air-heater) cold-end cleaning
- Deep convective superheater banks where insertion is impractical
- [Recovery boilers](/glossary/recovery-boiler) — used alongside IK retract designs

## Trade-offs vs IK

<table>
<thead>
  <tr>
    <th>
      Attribute
    </th>
    
    <th>
      IR rotary
    </th>
    
    <th>
      <a href="/glossary/ik-long-retract-sootblower">
        IK long retract
      </a>
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      Lance withdrawal
    </td>
    
    <td>
      Continuous in flue gas
    </td>
    
    <td>
      Withdrawn between cycles
    </td>
  </tr>
  
  <tr>
    <td>
      Reach
    </td>
    
    <td>
      Short, fixed radius
    </td>
    
    <td>
      Long, traverses across pass
    </td>
  </tr>
  
  <tr>
    <td>
      Continuous-exposure damage
    </td>
    
    <td>
      Yes
    </td>
    
    <td>
      No
    </td>
  </tr>
  
  <tr>
    <td>
      Mechanical complexity
    </td>
    
    <td>
      Lower
    </td>
    
    <td>
      Higher
    </td>
  </tr>
  
  <tr>
    <td>
      Coverage
    </td>
    
    <td>
      Local
    </td>
    
    <td>
      Cross-section of pass
    </td>
  </tr>
</tbody>
</table>

IR lances suffer accelerated wear from continuous flue-gas exposure compared with IK retracts but are mechanically simpler and suit applications where the cleaning zone is fixed.

## Related terms

- [Steam sootblower](/glossary/steam-sootblower)
- [IK long retract sootblower](/glossary/ik-long-retract-sootblower)
- [Air heater](/glossary/air-heater)