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Published May 8, 2025 9:13am

Oxygen – The Key to Optimizing Boiler Efficiency

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Introduction to the Role of Oxygen in Boiler Systems

In Vietnam’s boiler industry, oxygen control is a critical factorin optimizing boiler efficiency,reducing operating costs, and protecting the environment.

Oxygen not only influences the combustion process, but also determines the level of harmful emissions such as NOx and CO.This article will analyze the importance of oxygen control, explore methods to optimize combustion efficiency, and highlight advanced technological solutions to achieve these goals.

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Why Is Oxygen Control Important?

The oxygen level in a boiler’s combustion chamber must be maintained within an optimal range to ensure complete fuel combustion.Without proper control, the following issues may arise:

  1. Excess Oxygen (O₂)::
    • Too much air entering the boiler reduces heat recovery efficiency
    • Increases NOx emissions, leading to environmental pollution and non-compliance with Vietnam’s emission regulations
    • Wastes energy and increases operating costs
  2. Insufficient Oxygen::
    • Incomplete combustion produces toxic carbon monoxide (CO)
    • CO causes equipment corrosion, increases the risk of fire or explosion, and poses health hazards to operators
    • Reduces boiler efficiency and leads to fuel losses

According to research, maintaining excess oxygen levels between 0.5% and 2% is considered ideal for ensuring efficient combustion, conserving fuel, and minimizing emissions.

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Benefits of Optimizing Boiler Efficiency

Oxygen control not only improves efficiency but also provides several other advantages:

  • Fuel Savings:Complete combustion allows for more efficient fuel usage, reducing operating costs.
  • Environmental Protection:Lower NOx and CO emissions help meet strict environmental regulations in Vietnam.
  • Extended Equipment Lifespan:Minimizes corrosion and damage caused by CO or unwanted chemical reactions.
  • Enhanced Safety:Prevents the risk of explosions caused by CO accumulation.

Emerson's Oxygen Control Solution

To achieve optimal boiler efficiency, Emerson offers the Rosemount™ 6888A In Situ Oxygen Analyzer to optimize combustion:

  • Fast response time for control applications: 8 seconds
  • Operates at temperatures up to 1050°C
  • Easy calibration, even during boiler operation
  • On-site probe repair and replacement minimize maintenance downtime
  • Accuracy: ±0.75% of reading or ±0.05% O₂

Optimize Boiler Performance with Việt An Enviro

Controlling oxygen levels in boilers is not only key to optimizing combustion efficiency but also a critical step in protecting the environment and reducing operational costs.

With solutions from Emerson, businesses in Vietnam can achieve enhanced boiler performance, contribute to environmental protection, and strengthen their competitive edge through sustainable production.

Viet An Enviro is proud to be the official distributor of the Rosemount™ 6888A In Situ Oxygen Analyzer by EMERSON in Vietnam. Contact us for professional consultation.

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Headquarter: 4E, Street No. 6, An Phu Ward, Thu Duc City, Ho Chi Minh City.

Sales center: (+84) 901 379 116.


.Viet An Northern: Lot 33, BT4-1 Area, Trung Van Housing Project, Trung Van Ward, Nam Tu Liem District, Hanoi.

Sales center: (+84) 901 851 116.


Viet An Central: No. 5A, Mai Xuan Thuong Street, Hoa Khe Ward, Thanh Khe District, Da Nang City.

Sales center: (+84) 898 119 116


By Nam Nguyễn

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