Pulp & Paper

Pulp & Paper

Combat the corrosion and irreversible damage caused by pollutant by-products at pulp and paper mills. Prevent equipment failure with Camfil’s molecular filters in a variety of applications.

Even in the digital age, paper and cardboard are essential global commodities. Processing wood and reclaimed waste paper to make pulp and new paper requires the use of aggressive chemicals. These chemicals can corrode process equipment, especially sensitive electronic and electrical process control systems.

When these fail, the result is unplanned shutdowns and loss of process efficiency and profitability.

Sources of contaminants that can trigger corrosion

The primary papermaking processes – pulp and wastepaper bleaching, lignin removal and wastewater treatment – are the source of the following contaminant gases that warrant corrosion control:

  • Hydrogen sulphide
  • Sulphur dioxide
  • Mercaptans
  • Chlorine
  • Chlorine oxide
  • Ozone

Remove harmful gases with molecular filtration for the pulp and paper industry

The rooms containing electrical and electronic control equipment are ventilated with temperature and humidity conditioned air to achieve the environmental conditions required by the warranty conditions imposed by original equipment manufacturers.

The supply or make-up air will be taken from an external location and the outdoor air may be heavily contaminated with acidic gases. If these gases are not removed before the air enters the room, then the control equipment will be susceptible to damage and, ultimately, failure due to corrosion. Molecular filtration can remove these gases.

The gas concentration in the inlet air may be high – perhaps tens of parts per million (ppm). However, the manufacturer’s warranty typically requires in-room gas concentrations in the very low parts per billion (ppb) range to comply with corrosion class G1 under ISA 71.04-2013. A molecular filter installed in the outdoor supply air system must operate with very high efficiency on a single-pass basis. Importantly, this air, which may account for up to 40% of the total room ventilation rate, is used to positively pressurise the control room to prevent the ingress of fugitive gases. The level of pressurisation can be compromised by unnecessary opening of doors and windows, leaks due to construction defects and leaks at cable entry points.

To provide additional protection from fugitive gases, additional molecular filtration can be installed in the return/recirculation air system. Concentrations of gases are much lower in the return air and a filter will operate on a multi-pass basis. A lighter duty filtration solution than that used in the outdoor air system makes a good choice. Sometimes industrial air cleaners make a good choice for both room pressurisation and as recirculation systems.

3 steps for effective corrosion control with Camfil

Here’s what Camfil can do for you to meet the challenges of your pulp and paper operations.

  1. Evaluate the environmental conditions.
  2. Provide filtration solutions based on corrosive gas concentration levels and the operating conditions of existing ventilation systems.
  3. Monitor on-site performance in accordance with applicable standards, such as ANSI/ISA -71.04-2013 and IEC 60721-3-3.


Latest articles

Gaining control over corrosion with molecular air filtration solutions

Created Monday, 21 June 2021

Corrosion of electronic process control equipment can cause disruptions in production leading to lower productivity and lower profitability - this can be expensive to fix.

Electronics and optics


Created Monday, 21 June 2021

Dust is everywhere – in our homes, workplaces and the surrounding environment. One can be annoyed with the dust piled on the surface of the bookshelf but unfortunately there is a darker side; the dust can cause allergies, health problems and expensive issues in production processes and equipment.

Manufacturing and Machinery Air quality

Gold Series X-Flo

Created Monday, 21 June 2021

GSX collectors are ideal for use in pharma, mining, food and chemical processing industries. They also provide a safer work environment in metalworking applications like welding and cutting.

Manufacturing and Machinery

Efficient removal of corrosive, harmful, and odorous contaminants from air with CamCarb VG: engineered molecular filtration solution

Created Monday, 21 June 2021

CamCarb VG modules with loose-fill media are robust solutions suited for make-up air (outdoor air) and recirculation air systems. The primary use is the control of acidic gases that are responsible for the corrosion of electronics and electrical equipment in heavy process industries such as pulp and paper mills, petrochemical refineries, mining and metal refining operations, and wastewater treatment plants.

Manufacturing and Machinery Electronics and optics Life science and healthcare Commercial and Public buildings Air quality

Molecular Contamination Control & Sustainability

Created Monday, 21 June 2021

Molecular Contamination Control (MCC) products remove molecules, gases and vapours from the air that cannot be captured using ordinary particle filters. Molecules are typically 1,000 to 10,000 times smaller than the most penetrating particles that pass through HEPA and ULPA filters.

Sustainability Air quality

Smurfit Kappa Pulp and Paper Company Improves Pressure Drop By 92% With GTC Cartridge Filters

Created Monday, 21 June 2021

Low pressure drop GTC air filters minimize filter replacement requirements, improve power output, and lower fuel consumption.

Case Studies Manufacturing and Machinery Energy and Power Systems