Somec automates the management of plant waste storage areas with a Verlinde EUROBLOC VT tackle of 6.3 tons

Somec automates the management of plant waste storage areas with a Verlinde EUROBLOC VT tackle of 6.3 tons
Monday, June 9, 2014Description :
Somec, a Dalkia subsidiary, acts as a delegation of service for district heating and hot water distribution in the Val Fourré district of Mantes la Jolie in the Yvelines region. The new biomass boiler plant inaugurated last December is largely automated and the Verlinde EUROBLOC VT 6.3 ton hoist dedicated to the management of plant waste storage areas participates fully in this automation.

 

Dalkia operates urban heating systems, mostly gas-fueled, fatal energy recovery, heavy fuel oil, and sometimes cogeneration, which allows electricity to be sold back to electricity distributors. At Mantes La Jolie, the company decided to build a new boiler room using biomass as fuel, that is, untreated wood free from any chemicals (such as paints or varnishes) and reduced to shredded, calibrated In size and in hygrometry. This combustible resource comes from pallet shredder, pruning of trees in urban areas and vegetable waste or from branches of neighboring forests. The collection of this unusable material in the wood processing industry is carried out within a radius of 80 km around the boiler room of the stuffed Val.

The Belge Vyncke company, which specializes in the construction of biomass boilers, has been selected to install in this new boiler room two biomass boilers of 8 MW each, as well as all the equipment necessary for their operation. This boiler room is thus able to provide 70% of the energy needed to heat and supply hot water for the 5500 units of the Val Fourré and the surrounding community facilities such as the lycée, the college, the sports center , The administrative centers, and the François Quesnay Hospital Center. Thus, the existing gas boiler will switch from a main source of energy to a booster source. The overall carbon footprint is significantly improved.

A fully automated lifting crane with Verlinde lifting components

This new biomass boiler, which operates 24 hours a day, is constantly supervised by two operators. The automation must therefore be pushed to its maximum, and in particular the continuous feeding of the boilers. With gas, by simplifying, it is enough to open or close a valve. With biomass, solid fuel imposes other modes of operation and especially its storage and the supply of boilers. The three fuel pits are fueled during the day by a truck ballet. Each boiler has its own pit. Equipped with a moving floor, these ensure a regular supply of fuel. The third pit serves as a buffer storage area for feeding the boilers at night and, if necessary, during the day or continuously over a period of three days. The fully automated 5.3-meter Verlinde crane with 6.3 tonne crane is the essential element in the management of the shredded wood storage area and the continuous feeding of the boilers.

A perfectly squared buffer storage area

In order to automate as much as possible the main storage area, it is virtually gridded into thirty square spaces of identical dimensions. The crane with Verlinde components, equipped with a 3.5 tonne grapple with a volume of 5 m3 and a maximum load of 1.5 tons, is equipped with a PLC on the trolley.

This controller, which also manages the grapple's hydraulic power unit and the overload or overload safety devices, is permanently connected via a secure WiFi connection to the other PLC of the installation, a Simatic from Siemens. The latter has in memory the grid of the zone in order to organize in a homogeneous way the removal of the fuel.

Thus, thanks to the detection sensor associated with the grapple, for each cell, the system will know what height of material is present. As the crushed trucks arrive, the traveling crane transfers the material from the truck dumping area to the storage area and is directed towards the cell best suited to the removal of its load .

The movement of the crane over a length of 30 m, a width of 16 m and a height of 13 m is perfectly safe, thanks to no less than a hundred sensors, absolute encoders and roller limit switches. For even more safety, all devices are duplicated and all the on-board intelligence of the bridge crane communicates with the operators. An essential tool for the operation of this boiler room, the crane must provide a productivity of 140 m3 / h of transported material. To satisfy this specification, the lifting speed is 20 m / min, and the horizontal travel speed is 63 m / min. The variable speed in ascending / descending as in translation has been retained, because it avoids the peaks of current while allowing smooth starts and limits the swing of the load during transfers. Similarly, the wireless control has been retained, for a simplification of manual operations.

Compliance with the specifications, deadlines, equipment reliability and team availability are key elements in Verlinde's choice for this project for Jérôme Béarelle, project manager at Vyncke, for which automation is a decisive factor in the Productivity of biomass boilers.

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