ON-LINE Dry Chemical Cleaning of Furnaces, Heaters, and Boilers

“On-The-Run” Dry Chemical Cleaning

SENTRO TECHNOLOGIES USA, LLC specializes in furnaces and heaters dry chemical cleaning during normal operating conditions.

There is no need to shut down the equipment, production continues normally.

The cleaning process applied on the external tube surface of both radiant and convection tubes (fireside).

We also dry-clean air preheating system, economizer, and other types of process equipment.


A Process of Chemistry & Physics

Cleaning is done by a combination of mechanical effect and chemical effect – simultaneously.

The mechanical effect is non-aggressive abrasion over the tube surface, without damaging the surface, fins, or refractory.

The chemical effect is a neutralization reaction between alkaline SENTROMAX™ chemicals and the acidic scale, hot spots (usually sulfuric), and fouling deposits.

This innovative dry cleaning process is safe, environmental-friendly, and cost-effective.

VIDEO – SENTRO On-Line Dry Chemical Cleaning – Radiant Section











VIDEO – SENTRO On-Line Dry Chemical Cleaning – Convection Section 



We anticipate that the SENTROMAX™ On-Line Dry Chemical Cleaning of process furnaces, heaters, and boilers will deliver the following benefits and results:

  1. Cleaning is performed On-Line during normal operating conditions of the unit, there is no need to shut it down.

  2. Removal of scale and fouling from external tube surface, Radiant and Convection tubes, thereby increasing thermal efficiency (heat transfer). As a result, reducing operating energy consumption and increasing production rate.

  3. No Scaffolding required.

  4. No water, no water-treatment.

  5. No dry-Ice (no thermal shock to tubes, especially to cast iron tube-supports)

  6. No foam or soap (no caustic stress corrosion cracking)

  7. No clean-up or disposal requirements

  8. No harmful chemicals (no negative environmental impact)

  9. No damage to tubes, fins, refractory, instrumentation.

  10. No confined space entry

Major Benefits:

  •  Immediate increase of furnace or boiler thermal efficiency

  •  Immediate increase in throughput/production

  •  Energy-saving by reduced fuel consumption

  •  Reduced emission/pollution

  •  Reduce temperature profile of the furnace or boiler (cell, bridge wall, stack)

  •  Pre-shut down activity – saves time and costs

  •  Saves maintenance activities (such as: scaffolding, sand blasting, water blasting etc..)

  • TOTAL THERMAL EFFICIENCY of the furnace can be increased by 4-12%

Fouled Radiant Tubes:

On-Line dry chemical cleaning in action – Radiant section:

















On-Line dry chemical cleaning in action – Convection section:

 Radiant Tube Cleaning Process


Note clean areas vs. dirty areas

Convection Tubes Cleaning Process


Note clean areas vs. dirty areas

Convection Section Existing Openings/Windows:

Convection Section Openings (Flanges) Made Specifically for SENTRO Cleaning:








Furnace On-Line Dry Chemical Cleaning (Night Shift):.

Note the light plume of white smoke, that appears like steam




SENTROMAX Dry Chemicals are non-hazmat, non-toxic, and not Regulated for Transport  


SENTRO Setup Near the Furnace: Equipment, Chemicals, Air Compressor and Hoses

Note that our footprint is compact and easily moved between units


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