Pulverized coal bunker provided with discharging and weighing device and feeding fluidization system

Abstract

The invention relates to a pulverized coal bunker provided with a discharging and weighing device and a feeding fluidization system. The pulverized coal bunker comprises a pulverized coal bunker body,an annular injection gas supply device, a fluidization device and a powder weighing device. A conical hopper is arranged on the bottom of the pulverized coal bunker body, the annular injection gas supply device and an inlet pipeline are arranged on the conical hopper, a pulverized coal discharging opening is sequentially connected with a pneumatic gate valve, a first electric cut-off seal valve,the fluidization device, a second electric cut-off seal valve and the powder weighing device, the pulverized coal discharging opening and the pneumatic gate valve are connected through a flange, the pneumatic gate valve and the first electric cut-off seal valve are connected through a flange, the first electric cut-off seal valve is connected with the fluidization device through a flange, the fluidization device is connected with the second electric cut-off seal valve through a flange, and an inlet pipeline serves as a channel of nitrogen injection and large block manual treatment. The problems that in the storage, discharging, conveying, and weighing process of pulverized coal in the bunker, blockage is prone to happening, fluidization is poor, vortex return is generated, weighing of pulverized coal is not accurate, and fuel cannot be stably provided for a lime shaft-kiln combustion system are solved.

Description

technical field [0001] The invention relates to the technical field of pulverized coal conveying and feeding in a large lime shaft kiln, in particular to a pulverized coal bin equipped with a discharge and weighing device and a fluidized feeding system. Background technique [0002] When the combustion system of the lime shaft kiln uses pulverized coal as fuel, a pulverized coal bin is required as an intermediate storage tool, and the supply of pulverized coal is controlled by a pulverized coal weighing device, and then the pulverized coal weighed is weighed by the pulverized coal weighing device. The same amount is provided to the burners of multiple evenly distributed combustion systems, so as to ensure that the lime in each part of the lime shaft kiln is burned uniformly, and to avoid or reduce the phenomenon of overburning and raw burning of quicklime. [0003] The currently commonly used connection structure between the pulverized coal bin and the pulverized coal weighi...

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Problems solved by technology

[0004] The invention provides a pulverized coal bin equipped with a discharge and weighing device and a feed fluidization system, which can solve the problem of easy blockage and poor fluidization of coal powder during storage, discharge, transportation and weighing in the bin. Good, vortex return material and inaccurate coal powder weighing, can not provide fuel to the lime shaft kiln combustion system stably, meet the technological requirements of the lime shaft kiln combustion system, improve the heating uniformity of the kiln materials and finished products, and benefit Reduce the fluctuation of finished product quality and improve the quality of finished product

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