Coal powder conveying device

The utility model discloses a coal powder conveying device which comprises a feed tank, wherein three coal powder lock hoppers are arranged above the feed tank; each coal powder lock hopper is connected with the top of the feed tank through a blanking pipe, and the blanking pipe is provided with a blanking valve; one coal powder lock hopper is communicated with the feed tank through a tank body pressure equalizing pipe, and the tank body pressure equalizing pipe is provided with a tank body balance valve; lock hopper pressure equalizing pipes are connected among the three coal powder lock hoppers, and the lock hopper pressure equalizing pipes connected into the coal powder lock hoppers are respectively provided with a lock hopper pressure equalizing valve; and a feed pipe is arranged at the bottom of the feed tank, and the feed pipe is provided with a feed valve. According to the coal powder conveying device, nitrogen compressed in the coal powder lock hoppers can be sufficiently utilized, so that the consumption amount of nitrogen of the system is effectively reduced, and the relatively high economic benefit is achieved; the system carries out on-line coal powder circulation before feeding, so that the feeding stability is ensured; and the flow rate of coal powder can be preferably controlled, the problem of system instability caused by coal powder fluctuation is preferably solved, and the relatively high safety production value is achieved.