Alarms

Detection in waste incinerator

by Mark Rowe

In Prague, the Czech capital’s waste incinerator has had ageing flame detectors replaced as part of an upgrade to their fire detection. The incinerator and cogeneration plant in the district of Malešice are operated by Pražské služby a.s. and processes all of Prague’s household waste to produce electricity and heat. Capable of processing up to 300,000 tons of waste per year, the authorities felt it imperative to upgrade using the latest fire detection. The upgrade was installed by Fike’s local approved partner Avalon s.r.o..

The movement of concentrated waste around the plant is a fire risk and requires fire detection that is reliable and fast acting. Unlike conventional fire detection systems, the SigniFire Video Image Detection (VID) system from Fike Safety Technology (FST), camera-based, doesn’t use traditional forms of smoke, heat or flame detection. Instead, it works by automatically analysing video images at the point of detection in each video fire detector, looking for tell-tale indications of the presence of smoke and/or flames. Multiple cameras were installed to monitor the high-fire risk areas in the plant. The household waste is taken to the plant using LPG-powered vehicles. A gas re-fuelling facility for the vehicles is provided at the plant and due to the potential fire risk, it is also protected by SigniFire.

Filip Langer, Managing Director of Avalon, says: “A waste incinerator is a very demanding environment for a fire detection system and in many areas is unsuitable for traditional detectors. We therefore chose SigniFire for its unique advanced technology, resilient and redundant architecture and its field proven reliability.”

Avalon also upgraded the conventional fire alarm system that protects the cogeneration plant, offices and workshops. Each SigniFire camera is connected directly to the conventional system using fire and fault outputs. All of the cameras are recorded on a network video recorder (NVR), which is connected via an IP network. Recorded video can be an aid as a post-incident analysis tool, helping to identify the cause of alarms.

Analogue video feeds from the cameras are fed into the CCTV system to provide further monitoring and alarm confirmation. As for resilience, even with a failure of the IP network, CCTV or fire alarm, the SigniFire camera is still capable of detecting a fire and raising an alarm. SigniFire is UL Listed, FM Approved and CE Marked. Visit www.fikesafetytech.co.uk.

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