Study of Parameters and Theory of Sucrose Dust Explosion

Abstract

To investigate the parameters of sucrose dust explosion, the minimum ignition energy (MIE) and minimum ignition temperature (MIT) were evaluated. The experiments tested the MIE of sucrose dust under different conditions of dust quantity, ignition delay time (IDT), and powder injection pressure (PIP). The experiments tested the MIT of different particle sizes. The results demonstrate that the MIE of sucrose powder under three conditions was an open-up quadratic polynomial. When the dust quantity, the IDT, and PIP were 0.5 g (417 g/m3), 90 ms, and 150 kPa, respectively, the MIE was 58.9 mJ, 62.6 mJ, and 52.4 mJ. The MIT was positively correlated with the particle size of sucrose dust, and the MIT was 340 °C. At the molecular level, the “O–H” bonds of the sucrose molecule hydroxyl groups were broken by the discharge of electrodes or high temperature to generate H2. The combustion of H2 caused the explosion to spread to the surrounding sucrose dust and made the deposited dust rise, forming an interlocking explosion. The explosion would not stop until the dust concentration dropped below the lowest explosion limit. The results of this study can provide guidance for sucrose enterprises to prevent dust explosion accidents.

Study of Explosion Characteristics and Mechanism of Sucrose Dust

“…Different from the heterogeneous reactions of metals [12], phase change and pyrolysis are considered to be the preconditions for the explosion of sucrose dust [13,14]. Some scholars have proposed that flames appear on the surface of sucrose particles [15]. After that, the flame temperature will rise rapidly [14].…”

Explosion Severity of Rice Dust in a Spherical System

“…These materials are often finely ground and can easily become airborne, creating a combustible dust cloud. If this dust cloud encounters a source of ignition, such as a spark from equipment or static electricity, a dust explosion can occur [2]. Extensive research and technological developments have been performed on the nature, severity, mechanisms, and damage control of dust explosions.…”