Two new webinars on May 18, 2022 (8 a.m., 3:30 p.m.)
For more than 25 years, the RBG system has been used worldwide with
great success for the reliable dispersion of non-cohesive powders such
as mineral dusts, active pharmaceutical ingredients, pollen, etc.
Learn more about our new devices in this webinar with our product manager Dr. Carsten Persner.
In the course of site preparation, construction or demolition work, there is usually considerable dust generation. It often leads to complaints from residents to the local authorities and industrial inspectorates.
Dust development, reporting, evaluation and countermeasures extend over a considerable period of time. This is a severe impediment to effective and timely deployment of immission control measures. MyAtmosphere is a cloud-based data platform for air quality. The proven Palas® fine dust measuring device AQ Guard Smart, which was developed for use on construction sites, enables the continuous recording, visualization and monitoring of fine dust pollution. Wind direction and speed can also be taken into account.
When limit values are reached, the construction site operator or the responsible authority automatically receives a notification or on-site visual signal, so that dust-reducing actions can be initiated or reinforced. Residents can also obtain information about air quality online.
Construction site operators, authorities and residents always have transparency about the current situation and the possibility to implement the best possible immission protection during construction.
Palas GmbH at TiefbauLIVE in Karlsruhe - Meet us from 5-7 May 2022 at booth H402.
Everyone could see and feel it: From March 14. - 16. considerable amounts of Sahara dust were carried from the Sahara desert to Europe, especially Spain as well as France, Switzerland and Germany.
The skies turned red and the dust was found everywhere (cars, tables, snow, etc.). While in Spain also the fine dust values PM2.5 and PM10 increased very strongly, the increase was more moderate in Germany. As a result of the rain, a large part of the Sahara dust was washed out as precipitation, so-called blood rain, therefore especially the coarse fractions did not remain very long in the aerosol state.
Sahara dust contains very coarse-grained parts, as the following electron microscope image shows (Fig 1).
Fig. 1: Electron microscope image of Sahara dust, shown in German Tagesthemen on 15.3.2022
The reddish coloration comes from the high iron oxide content. As can be seen in the picture, the size of the particles is in the range 1-10 µm.
This is also reflected in the measured size distributions on the AQ Guard monitors. Below is an example of three size distributions measured at the Karlsruhe (Fig 2 and Fig. 3).
Fig 2: AQ Guard at the Headquarters Palas Karlsruhe (Germany) with clear deposits
Fig. 3: Size distributions measured at the Karlsruhe site
The blue curve shows a distribution shortly before the event. The green and red curves show size distributions at the time of the Sahara dust episode. They differ depending on the weather conditions. For example, in the case of simultaneous precipitation (green curve) the distribution is increased overall, but only in the range < 1µm. Coarser particles are washed out more by the rain and are therefore hardly elevated. The red curve shows a distribution typical for Saharan dust with increased fraction in the range 1-10 µm.
On the long journey from the Sahara through southern Europe to northern Europe, the Sahara dust and aerosol size distribution changes as a result of local weather conditions.
The size distributions across Europe can therefore differ locally, but are very well resolved by the size-resolved measurement with the aerosol spectrometers of the Fidas® 200 and AQ Guard fine dust systems.
Karlsruhe, March 8th, 2022: Palas GmbH from Karlsruhe, Germany, will present three new aerosol generators for dust dispersion from the RBG systems range at FILTECH in Cologne.
For mass flows from 40 mg/h to 800 g/h, the three new aerosol generators RBG professional , RBG basic and RBG solo meet all current requirements in many areas - from research to quality assurance and calibration.
The feed for the storage container filled with dust or powder is provided by state-of-the-art stepper motor technology, which ensures precise feeding to the dispersing brush over a wide mass range.
The RBG professional is also designed to be pressure-resistant up to 10 bar and is equipped with automatic volume flow control. This ensures high stability of dispersion performance over a wide range of applications, even with fluctuating supply pressure.
A pump for supplying carrier air is installed in the RBG solo . This means that the unit can be used anywhere even without a compressed air supply.
All models also offer the option of remote control via PC using the Palas® RBGControl software, which is included in the scope of delivery.