Abstract
Dust explosion characteristics such as maximum explosion pressure, maximum rate of pressure rise, minimum explosible concentration and limiting oxygen concentration are important characteristics to reflect severity and sensitivity of specified combustible dust. A 20L spherical dust explosion test system was developed for dust explosion risk assessment, and the key technologies were described. The test apparatus was developed according to related international standards, and electrostatic ignition was added as alternative ignition source other than pyrotechnical ignition. The control and data acquisition system include programmable logic controller (PLC), personal computer and data acquisition card. The communication between PLC and computer is based on Ethernet and OPC technology. The software working as a virtual instrument was developed using C#. It supports functions of remote control, data acquisition, data analysis and database management.
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