Humidification & humidity control in paper & pulp production

Humidity control in the paper industry is essential to control the moisture loss of the paper after drying. Once produced and reeled, the paper can be exposed to ambient conditions at the end of the paper machine for considerable periods of time. Exposed surfaces of the paper will change in moisture content dependent on the ambient humidity, leading to problems during the slitting and wrapping processes.

Low humidity, below 50%, causes the paper to shrink, curl and lose dimensional stability making the reel of paper unusable and in turn very costly to the manufacturer. To stop this from occurring, the typical humidity level required is 55%rH. When this level is maintained the moisture in the paper maintains not only the flexibility of the product but also its stability during production and packing.

Low humidity in the slitting area will cause moisture losses to occur; these losses will take place very quickly. However, damage to the paper may not be seen at this stage as the tension on the paper prevents any curl or dimensional change being seen.

Changes to the paper in the slitting process will show at the sheeting stage because the tension has been taken off the paper and it is now free to change its shape.

When humidity is below 45%RH static electricity will be generated, which can cause packing issues and prevent a risk to staff from unexpected shocks.

 

Benefits of Condair humidification in the paper & pulp industry include:

  • Extensive expertise around the world with many paper & pulp applications
  • Better quality product, increased production efficiency and reduced wastage
  • Comprehensive product range to precisely meet customers' requirements
  • Low energy systems to reduce operating costs and improve humidity control
  • Low maintenance solutions to reduce on-going service requirements
  • Comprehensive service of expert advice, design, supply, installation, commissioning, maintenance and spares supply

Our paper & pulp clients include

    - Arjowiggins, France

    - Ceisa Packaging, France

    - Portucel Soporcel, Portugal

    - Fabrica Nacional de Moneda Y Timbre

    - Rizla, UK

    - Duni Paper Mills AB, Sweden

    - Holmen Paper Mills AB, Sweden

    - Modo Holmen Paper AB, Sweden

    - Metsa Tissue as, Slovakia

    Get free expert advice on humidity control in paper production

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    Parmeshwari Tea Company

    Ajay Dhandharia

    Managing Partner

    “After installing the JetSpray system we observed that any level of humidity required is constantly achievable without condensation or water getting deposited on the floor or over the machine. With improved humidity conditions, teas became brighter, blacker with better bloom and improved density.”

    Aston Martin

    Alan Darrock

    “We need a reliable, effective humidification system to ensure that we can achieve the utmost finish to our cars. Since the new equipment was installed we have seen improvement in the quality of the paint finish, and our workforce now keep the doors closed. We have been more than pleased with the service and skill that Condair offers and will be using them in other production areas.”

    Konvekta

    Amir Ibrahimagic

    Group Business Development Manager

    “Konvekta has standardised its exhaust air cooling systems on the Condair ME humidifier as its evaporative cooling solution. The reliability of the unit is second-to-none. It incorporates the highest quality components that give utmost longevity and performance to our clients. Alongside the product’s USPs, Condair is also a very solutions-oriented partner. As a Konvekta energy recovery system is always custom designed for a client’s needs, it’s vital for us to have flexible design support from our evaporative cooling supplier.”

    Weatherite Group

    Andy Lewis

    Technical Manager

    “Weatherite only uses the highest quality components in its HVAC solutions, and this includes Condair’s evaporative humidifier. It certainly delivered on our specific requirements for operation, control and hygiene management, and we’ve been very pleased with the support offered by Condair in connection with this successful project.”

    Jydsk Aluminium Industri

    Bo Thornvig Jensen

    Teknisk direktør

    “We invested in an adiabatic cooling system and reduced our electricity consumption for cooling by 90%.”

    John Watson & Co

    Chris Fyfe

    Quality Assurance Manager

    “When paper loses moisture, ink will not adhere properly, which could cause a problem for our printing company whose reputation for quality is high. Not only has the JetSpray been proven in our industry, it is also uncomplicated, energy efficient and extremely hygienic in operation.

    Due to the conditions in our print room, the humidifier has been running 99% of the day since installation, keeping RH at a perfect 50%.”

    HMF Group

    Christian Myrhøj

    Produktionschef i maleafdelingen

    “We have no problems with painting since we got the Condair humidification system. Our production quality is always consistent and the error rate is minimal. The energy savings on ventilation was a welcome side benefit.”

    Steinway

    Craig Terry

    UK Managing Director

    “Dryness is the enemy of pianos so humidity is really important. We need 40% to 50% humidity all the time to protect the wood, whether they’re in the showroom or the workshop. Condair’s units are ideal for the job. And because we rely so heavily on the reliability of the humidifiers, we also contracted with Condair to service the humidifiers at regular intervals.

    Would I recommend Condair? Oh yes, they’ve supplied great service.”

    ZSL London Zoo

    Dave Clarke

    Head of Invertebrates

    “Having worked with Condair since 2008, we now rely on their steam humidifiers, which we find both efficient and easy to use. They are particularly important for our irreplaceable populations of endangered species, for example our Polynesian tree snails, many of which are now sadly extinct in the wild.”

    Sporting Edge UK Ltd

    Dave Vincent

    Managing Director

    “Sporting Edge produce the most advanced environmental chambers in the world and it’s vital all parts of our system offer consistent reliability and performance. This is why we have standardised our humidity control using the Condair RS steam humidifier.

    It provides us with a dependable, controllable product that will happily work with standard mains water. We also love the self de-scaling feature.”

    T Clarke

    Doug Lumb

    Project Engineer

    “The Condair DC 50W dehumidifier was actually chosen by our designers, as it fitted the bill perfectly for the environment. The unit size was based on the quantities of kit hung in the room to dry when the firefighters return to the Centre at the end of their training exercises.

    It’s a reliable product and currently operating at the station just as expected, plus installation was really simple and didn’t take long at all, so all very good.

    I would definitely specify Condair dehumidifiers for future projects.”

    Bunkermuseum Hanstholm

    Erik Ansø

    Museumsforvalter

    “The noise level is now so low that you can talk normally in the ventilation room even though both the ventilation and a dehumidifier are running, which was one of the criteria. You certainly couldn't do that before, and it's worked out well in a concrete bunker.”

    BluePrint AG

    Gerhard Meier

    Geschäftsführer

    “With Condair Systems, we reliably guarantee optimum humidity, which ensures greater quality and standardisation.”

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