VOC treatment process improvement
In a few words
EOLIOS’ in-depth study analyzed the homogeneity of the VOC + air mixture leaving a cacth tank.
VOC treatment process improvement
Year
2024
Customer
NC
Location
France
Typology
Laboratory - Industrial Process
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Overview of the treatment system
In the new collection network for volatile organic compounds (VOCs), each workshop will be directly connected to a collector called a “clarinette”, located just before the catch tank. This will enable the neutral pressure point to be located close to the VOC collection clarinet, facilitating aeraulic balancing of the network.
At the clarinet outlet and before entering the catch tank, there will be a fitting equipped with stove tails. This connection will enable the VOC flow to be directed to the existing VOC treatment plant, which is a boiler room, as a back-up solution in the event of the thermal oxidizer not being used.
A compensating air inlet in the clarinet will increase the total flow rate to the desired level, which corresponds to the nominal operating flow rate of the thermal oxidizer considered at this stage of the study. The air supply to the catch tank will be used to keep the lower explosive limit (LEL) below the maximum value permitted by the thermal oxidizer supplier.
A second catch tank will be positioned just before the thermal oxidizer to collect the condensates present in the last part of the VOC collector.
All VOC data, unless otherwise stated, are based on measurements taken over a 7-week period.
During the feasibility study, an analysis of the most effective VOC treatment techniques was carried out, and the choice fell on the Regenerative Thermal Oxidizer (RTO). RTO is a technology used to treat VOCs by incinerating them at high temperature. The operating principle of the RTO is shown in the figure below.
Creation of a digital study model
The creation of the model of the plant was carried out by taking into account the topology of the site with a great precision in order to be able to capture at most the evolution of the air flows. This digital twin takes up precisely the different sets of beams, the air volumes as well as the surrounding buildings.
This high level of precision in the creation of the digital twin translates into a clear improvement in the accuracy and relevance of the results obtained during CFD simulation.
Simulation of the wind around the building
The first CFD simulations of the external aeraulics have highlighted different interesting phenomena that could allow the increase of the wind potential. The restriction of the passage section of the wind at the rear of the building allows the creation of a Venturi effect, therefore a local increase in speed.
Following this study, Eolios was able to propose different designs respecting the different architectural challenges. These conclusions gave rise to in-depth work with the design teams, in order to accentuate and make the best use of this local increase in speed.
Wind power potential study
The objective of the study is to evaluate the relevance of implanting, or not, wind turbines within this building without impacting the overall architecture of the building. The use of CFD allows to simulate a large number of prototypes, in a short time, in order to quickly gather information for the optimization of the placement of the wind turbines as well as the optimization of the design in order to increase their efficiency.
This dynamic CFD study in order to set up and optimize the performance of wind turbines is part of a policy of development of sustainable energy. Minimizing the environmental impact as well as the energy consumption of buildings is at the heart of Eolios Ingénierie’s areas of interest.
