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How to avoid dust explosion of bucket elevator

Article source: admin release date: December 28, 2011

????? Bucket elevator Compared with other conveying equipment, it has the advantages of large lifting capacity, low power consumption, simple structure, good sealing performance and low cost, so it is widely used in metallurgical chemical industry and coal industry.
The occurrence of dust explosion needs to meet four conditions: a certain range of dust concentration; closed space: sufficient oxygen; fire source. Due to the bucket elevator in the loading process of the hopper at a high speed impact materials, resulting in a large friction and impact force, as well as the friction between the materials, so that the dust between the materials fly out; in unloading, materials thrown from the hopper also cause dust flying. The above two parts mainly cause the flying of inorganic dust. At the same time, the surface of many materials falls off due to friction on the surface; some materials are damaged by impact, and some starch in the interior falls off and flies. These two parts mainly form organic dust.
Although the bucket elevator is working in a sealed state, the barrel is not very tight. There is air entering at the interface and the feed port, so there is a large amount of oxygen inside. ?
If the bucket elevator is in poor running state, the possibility of spark will exist at any time. The main reasons are as follows:
(1) If there are metal impurities in the grain flow, they may collide and rub with the dustpan and produce sparks
(2) If the belt of bucket elevator deviates from the chassis, it may produce sparks
(3) Friction with other parts of the dustpan may occur
(4) The bearing is overheated and reaches the ignition point of dust cloud
(5) If the belt slip time is too long, the belt pulley will generate heat and reach the ignition point of dust cloud
(6) The outside open fire enters the bucket elevator to ignite dust.