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Rising costs of energy and raw materials, as well as a growing sensitivity towards controlling emissions, are driving all major converters and flexible packaging companies to explore new technologies designed to drastically reduce the costs associated with processing systems air and energy saving

NIRA: Safety, energy saving and respect for the environment in a single advanced solution

NIRA's Infrared (IR) LEL monitoring systems and flame ionization detector (FID) and automatic air recirculation control systems, for flow rate optimization in exhaust optimization and energy saving in printing and conversion.

Lower Explosion Limit (LEL) monitoring systems and air handling systems are essential elements of daily processes for print and converting companies. Correct implementation of LEL Monitoring Systems, whether they are Infrared or Flame Ionization, not only allows full compliance with all applicable laws and regulations, but also guarantees respect for the environment, with a significant reduction in Volatile Organic Compounds emitted in atmosphere, and more interesting, offering a significant opportunity for thermal energy saving and reduction of investments in air treatment systems.

By law, when evacuating from drying stations, hot air containing a certain concentration of solvents must be treated before being released into the atmosphere. This air can be treated with regenerative thermal oxidizers (RTO) or solvent recovery plants (SRP). Measuring the solvent concentration and managing that flow of hot air allows companies to save large amounts of thermal energy and reduces the footprint and consequently the investment required on air handling systems.

NIRA's LEL air monitoring and recirculation systems give you the power to optimize thermal energy savings and minimize your investment in air handling systems as much as possible, while ensuring maximum safety and reliability during your production cycles: our Infrared (IR) and Flame Ionization Detector (FID) LEL monitoring systems and automatic air recirculation control systems are the means by which you can ensure safety, achieve thermal energy savings, reduce investments and respect the environment. NIRA also produces stationary and portable TOC analyzers for emission control (Mercury and Aries), Fast Residual Solvent Analyzer (Neptune) and process control systems (Scorpio and Taurus) for the control of regenerative thermal oxidizers (RTOs) and solvent recovery plants (SRP).


NIRA's Automatic Air Recirculation Systems for water-based and solvent-based application

During normal solvent-based applications, the solvent concentration in evacuation from the drying stations is detected through a LEL monitoring system (Lower Explosion Level).

If the solvent concentration is lower than its permissible level, the exhaust air, in evacuation from drying stations, can be recycled and sent back at the inlet air duct. These air recirculation systems allow thermal energy saving and flow rate optimization. Usually, during water-based applications, these air recirculation systems are excluded or they are set to a low air recirculation percentages (± 30%).

To achieve an air recirculation system during water-based applications, it's possible to use Relative Humidity sensors, but unfortunately these sensors cannot be exposed to any vapors of solvents because it may alter their readings and even lead to their breakup.

In order to avoid this issue, we have developed an external sampling system. The sample gas (vapor) is sucked, by an ejector, inside the sampling system. Inside the sampling system, the sample gas (vapor) is analyzed by a Relative Humidity sensor; if the relative humidity of the gas is lower than a certain level, the exhaust air can be recycled and sent back at the inlet air duct. Considering the high temperature inside the drying stations during water-based applications (±100°C), these innovating air recirculation systems will allow a huge energy saving, up to 50%, of your actual thermal energy consumption.

NOTE: The NIRA automatic air recirculation systems for water-based applications can be combined together with any other type of automatic air recirculation system for solvent-based applications.

For any queries about our systems and services, please get in touch directly with us.

New Instruments for Research and Analysis Srl | Address: Via A. Locatelli n.113 - 20853 Biassono (MB) ITALY | Tel. +39 039 24.97.856 Fax +39 039 24.90.049 | Tax number and VAT: IT 01085550166 | Business Registration no. 257105 - REA of Bergamo

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