The amount of waste produced worldwide is continuously increasing. The Czech Republic produces annually approximately 3.5 to 5.5 million tons of communal waste. At present approximately 75% of communal waste in the Czech Republic is stored on depots. About 400,000 tons of this waste is consequently thermally processed in waste incineration plants in Prague, Brno and Liberec which produces about 2.3 million gigajoules of heat and about 18,000 megawatt hours gross production of electricity. For various types of waste products, thermal proceeding is practically the only suitable way of processing.
ZEVO Malešice combusts waste for conversion to thermal and electric energy. This energy is used for heating utility water and for heating residential houses. Waste fires when combusting waste is a real threat and this also applies to ZEVO Malešice. The most frequent reason for fire when combusting waste is spontaneous ignition during a reaction of chemical molecules and hot particles produced by vehicles transporting communal waste. A factor that increases the probability of self-ignition is the high concentration of methane which is released from the waste. To decrease the risk of fire, ZEVO Malešice decided to invest in a waste monitoring system from Workswell. The main objective of the system is to monitor waste placement and eliminate any threatening fires.
To solve this application, the SAFETIS thermal imaging cameras system was used with special software primarily for monitoring the environment to detect any burning, ignition and significant temperature increases. Up to 16 SAFETIS cameras can be connected at the same time which can monitor wide areas.
The stored waste in ZEVO Malešice can be monitored continuously 24/7, i.e. all the time the workplace is operating. For this specific application Worskwell delivered two SAFETIS 640×480 pixels resolution and 80°lens cameras. The depots and incineration plants monitoring system from Workswell combines contact free SAFETIS thermal imaging cameras with a central unit and proprietary software, which duly warns the operator and notifies him of the threat of a fire starting. It can also activate automatic extinguishing by water guns due to the exact locality of the fire which the system provides
“The whole system is scalable and may consist of several thermal imaging cameras with high space resolution and thermal sensitivity higher than 0.05°C”, says Jan Kovář from Workswell. The monitored area was divided into zones in which temperatures are evaluated several times per second. So, the system automatically notifies operators of any area with an increased surface temperature almost immediately.
The software notifies operators, whenever the temperature in the area exceeds certain defined values. Visualization software is used in the operator’s stations in the control room, so the operators have all the necessary information. Whenever there is an alarm the operators are informed by an acoustic signal. In addition to the thermogram, the software gives the operators a map of the area divided into sectors. This makes it easy for operators to determine places with increased temperatures. The long-term developments of temperatures in each sector are also displayed in synoptic charts.
Before the commissioning the whole system passed detailed testing with good results. In addition, SAFETIS cameras are price friendly and contribute to the overall cost efficiency of the depots and incineration plants monitoring system.
Workswell SAFETIS is a thermal camera (thermocamera) specially constructed for the fast detection of the risk of flare-up before the occurrence of fire…