Paper & Pulp

Industries: Paper & Pulp

As one of the largest industrial sectors in the world, the pulp and paper industry has an enormous influence on global forests. This sector, which includes products such as office and catalog paper, glossy paper, tissue and paper-based packaging, uses over 40 percent of all industrial wood traded globally. Responsible pulp and paper operations can bring many benefits to forests, local economies and people, particularly in rural areas. Many pulp and paper companies are demonstrating leadership in responsible forestry and plantation management as well as in clean manufacturing processes and recycled content.

Heat Exchangers in Paper & Pulp Plant:
  • The pulp and paper industry uses a large amount of energy in its various drying processes. Drying is an essential step in the transformation process and as such, heat exchangers for air heating must be reliable, but also highly efficient in order to minimize the factory’s energy bills. Steam heat exchangers (also known as steam coils) are often used to heat air, which in turn will be used to dry wood pulp in pulp and paper mills or even wood in kiln dryers. The most common heat transfer fluids used to heat the air are water or a water-glycol mixture or steam Sometimes, the use of steam in the coils brings some problems, which lead to the premature failure of the coils.

    One of the main reasons for the breakdown of a steam coil is the freezing of the condensate when air intake temperatures are below the freezing point.

Heat Exchanger Failure Mechanism:
    • Process fouling
    • Process Corrosion
    • Steam/condensate corrosion

    Three main areas for improvement to minimize future in-service tube failures.

    • Tube testing
    • Retubing strategy
    • Design improvements.
Tube Testing
  • Technologies for inspecting heat exchanger tubes are rapidly changing and continuously improving. Variance in test results depending on both the instrument and operator. The impact of human factors on non-destructive examination (NDE) performance is more prominent with the increased complexity and sophistication of today`s NDE techniques. Root cause analysis of some of the tube failures identified the need for reliable technicians and technologies.

    APRIS provides solution to tube inspection problems with important advantages to paper & pulp plants by minimizing downtime and improving operational productivity.

Applications:
    • Fire Tube Boiler
    • Air cooled condensers
    • Vaporizers
    • Heaters
    • Coolers
    • Economizer
    • Water Tube (D Shaped) boiler
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