Tunnel Fans

Tunnel Cleaning Dry Dedusters Underground space “today” and for the “future”

Humanity is searching for new living spaces and also the ability to have fast mobility facilities. One solution is to use the sub-surface and create habitable spaces and a travel infrastructure network underground.

Tunnels during construction, mining, or whatever activity The range of DS dedusters provides the technical answer is going on below ground generates a remarkable that can be used to filter the polluted air and bring it in amount of dust, therefore one of the major requirements line with the legally permitted atmosphere present in the is for the control and collection of dust. European tunnel. These can be either hydro, road, rail or metro and Directives impose stringent exposure limits, to a finite also the activities during tunnel refurbishing activities. particles, so as to reduce the risk to the worker’s health, DS dedusters are required, even to a greater extent, by reduce social costs, and increase safety. the World Health Organization (WHO), especially when Systemair, backed up by its experience in tunnel silicon dioxide (quartz) or asbestos are present in the ventilation, is always sensitive to such human and rocks that are being excavated. The high efficiency environmental issues and has specifically designed a is especially suitable for fine dust (PM2.5) that is filtration system leading to an advance in technology for particularly unhealthy for the personnel working in the dry deduster equipment. tunnel.

Tests in ! Several application of use are possible for our range of DS deduster units. Mechanical tunnel construction The units have been tested by the German Labora- executed by using Tunnel Boring Machine (TBM), road tory DMT in accordance to IKO DN 70 and VDI 2066, headers or even in the crush/mucking operations. with a load of 2000 mg/m3 (3.58 kg/h) in order to determine the MAK value for quartz (≤ 0.15 mg/m3). The efficiency is over 99.99%. These are the most typical situations where the dust present in the tunnel will be of the largest amount so, in order to be in line with legal legislations, a dust collection and reduction system must be adopted. The TBM drilling method normally uses a deduster, which is positioned in the TBM’s back up and should be limited in its dimensions.

Main fan

systemair Underground space “today” and for the “future”

Our particular design using the vertical cartridge is the most suitable one, since it requires just for filter removal, a side space of 500 mm that can provide easy access for assembly and removal for maintenance purposes. Our design is also suitable to accept modifications of the overall dimensions, particularly where TBM’s are being used for small tunnel diameters, where the height can interfere with the maximum allowable contour, a shaped external side can be accommodated. Special slimmer and more compact DS dedusters suitable for use with TBM’s are available and can be customized in accordance to customer’s needs.

The sturdy construction of the DS the available space agreed with the Dust conveyance/collection is deduster allows it to be used in the customer, units mounted in parallel standard via a cochlea conveyor harsh environments encountered can also be used. but alternative solutions like multi in tunnels. The airtight structure, Inside the tunnel the DS deduster cochlea, redler conveyor, water or which is manufactured in galvanized is installed so that it follows the dust bags etc. can be adopted and metal sheets which are then powder drilling operation, therefore the DS the dust is collected in a hopper. coated, with modular construction Dedusters movement must be easy Dust discharge can be customized so as to allow flexibility in order to and flexible. It is normally mounted with a roto-valve, pneumatic, meet the demand of the technical on a stable sled, but it can be also alternative valve, pumps or water specifications. The air volume range installed on a truck, on a railway etc. and then discharged for 3 3 varies from 2 m /s up to 30 m /s; flatbed or in a tailor made movable disposal. Cleaning of the filters is larger air volumes are possible with arrangement. automatically controlled and it is proper planning and on the basis of normally set up for the clogged

Inside the tunnel the DS deduster is installed so that it follows the drilling operation, therefore the DS Dedusters movement must be easy and flexible. It is normally mounted on a stable sled, but it can be also installed on a truck, on a railway flatbed or in a tailor made movable arrangement. filter pressure drop or fixed time, then an automatic cleaning cycle, with a counter flow compressed air system, at 5.5 to 6 bar is activated; other solutions available on request. The compressed air device can be included in the DS deduster or sourced from facilities that are available on site. The Fan section is normally assembled and mounted on the clean air outlet and it is dimensioned in accordance to the pressure losses required. The complete operating cycle is fully automatic and controlled by a PLC, it includes the fans start up, all electronic and electrical equipment The DS deduster is fully assembled out in the factory or on site. A full is encased in a control cabinet with in the factory, for larger dimensions Technical Service is available so as a suitable mechanical IP protection, it can be shipped in sections and to help the customer needs and for options such as inverters, remote locally assembled. The operational any personnel teaching or training controls, are available on request. settings can be previously carried that may be required.

The DS deduster design can be running costs, and the spare parts. a basic energy cost of € 0.15/kW, fully customized to suit various The limited pressure drop of the this would give an estimated saving customer needs and special units filtration section (filters and plenum of € 1275 per annum. Should made of stainless steel EN 1.4301, chamber) can be lowered by as we consider a typical air volume EN 1.4404 can be supplied. Special much as 40% compared to other of 18 m3/s for a standard tunnel electrical compliance to ATEX (incl. products of the same type, so that construction method (not TBM) the Group I M2), UL and UL/CSA. it makes the DS de-duster range energy saving is ranging closer to Life Cycle Cost (LCC) aspects most attractive. The operation of 30 kW so the associated saving to are becoming more important these units, when continuously annual running costs is € 38000 parameters. Therefore from working can have a high cost to .The payback time is consequently an economic point of view it is the customer, therefore running shortened and positively influences important to consider all aspects costs are sensitive to savings. As a the financial resources plan. from the preliminary stages to general guide for kW saving, with the maintenance, the operational 8500 hours/year running time, at

systemair Tunnel Construction Ventilation Systems – References*

Site Fans Year BBT Brenner Base Tunnel 2 of Dedusters DS-C16 16 m3/s V400/50/3 2018 Mules Bolzano South Africa 1 of Deduster DS3.5 V400/50/ 2018 Railway link Paris-Eole HSL 2 of Dedusters DS80 V400/50/3 2018 Railway high speed Milan-Genoa 1 of Deduster-U 30 for asbestos 2017 Castagnola access window ATEX EX IM2 V400/50/3 Italy Angat Project 1 of Deduster DS-MC4 4 m3/s 2017 Philippines V 400/50/3 Atlanta 1 of Deduster DS2.5-C 2.5 m3/s 2017 USA V 400/50/3 Albula Tunnel 2 of Deduster DS10-C 10 m3/s 2015 V400/50/3 Salt Mine 2 of Deduster DS24-C 24 m3/s 2015 New Mexico (USA) V460/60/3 Qingdao Metro Project 2 of Deduster DS-R 8 – 8m3/s 2014 Metro Tunnel V400/50/3 China Shanxi Metro Project 1of Deduster DS-R 3,3 – 3,3m3/s 2014 Metro Tunnel V400/50/3 China OTTAWA Metro 3 of Deduster DS-C 23 – 23 m3/s 2014 Metro Tunnel V460/60/3 Canada Birkikara-Msida-Gzira-Wiedis-Seweda Tunnels 1 of Deduster COMPACT 2013 Hydraulic Tunnel DS2 C-R – 2 m3/s Malta V400/50/3 Minas Project Ecuador 1 of Deduster DS6-R6 - 6 m3/s 2013 Mine Tunnel WxHxL 850x2027x8394 mm Ecuator V440/60/3 Bormio Ring Road 1 of Deduster DS16 – 16 m3/s 2013 Road Tunnel V400/50/2 Italy Birkikara-Msida-Gzira-Wiedis-Seweda Tunnels 1 of Deduster DS4 – 4 m3/s 2013 Hydraulic Tunnel V400/50/3 Malta

* Extract of references. The full list of references is available on request. Systemair · June 2018

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