A preparation method of inerting powder for rapidly suppressing deflagration of wood flour

Abstract

The present invention proposes a method for preparing an inerted powder for quickly inhibiting the deflagration of wood powder. Chemically modified expandable graphite is used as the inerting powder for inhibiting the deflagration of wood powder. , NaOH solution chemical modifier, respectively through the process of dissolving, stirring, ultrasonic, dipping, washing, filtration, drying and other processes to prepare inert powder that can inhibit the deflagration of wood powder. The innovation of the invention lies in that the NaOH modified expandable graphite is used as the inerting agent for the first time to remove organic combustible impurities, strengthen its characteristics such as suffocation and flame retardant, and prepare the graphite-based flame-suppressing and inerting agent, which has the advantages of low cost, rapid flame retardant, The characteristics of simple process and strong inerting performance have opened up the research of expandable graphite in the design of combustible dust inerting.

Description

technical field [0001] The invention belongs to the technical field of chemical building materials and fire safety, and in particular relates to a preparation method of an inerting powder for rapidly suppressing deflagration of wood powder. Background technique [0002] Dust explosions in the industrial manufacturing process have caused catastrophic property losses and personal injuries to human society. Since a large amount of combustible dust is easily produced in the industrial manufacturing process, for organic dust with low minimum ignition energy, when its concentration reaches above the lower explosion limit When the explosion occurs, tiny sparks can easily cause an explosion, especially in a confined space, a secondary explosion is more likely to occur, resulting in serious economic losses and social problems. Therefore, inerting and suppressing combustible dust explosion hazards has become an important safety prevention and control measure and development trend in t...

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Problems solved by technology

Common organic dusts such as starch, wood flour, and flour all have potential explosion hazards. However, the current research on dust explosions mainly focuses on the inerting treatment and explosion suppression technology for dense dust such as coal powder, aluminum powder, magnesium powder, and titanium powder. And the inerting agent used is mainly ammonium dihydrogen phosphate, aluminum hydroxide, calcium carbonate, ammonium bicarbonate, etc. and their compound, because it is difficult to mix evenly with combustible dust, resulting in a low explosion suppression effect

In addition, in the industry and trade, especially in the production and processing of wooden building materials, flammable and explosive light wood powders are easy to be produced, and there are few researches on inerting and explosion suppression of them, and no use of inorganic siliceous powders has been seen. Research Report on Inerting Explosion Suppression

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