Pulse-free coal powder supply device

Abstract

The invention relates to a pulse-free coal powder supply device which is characterized by comprising a delivery pipe and an air pipe arranged below the delivery pipe; the two ends of the delivery pipe are sealed, a feeding opening is arranged at the upper side adjacent to one end of the delivery pipe, and a discharging opening is arranged at the lower side adjacent to the other end of the delivery pipe; the feeding opening is radially connected with a storage silo and the discharging opening is radially connected with a blanking pipe; the upper half part of the blanking pipe is vertical and the lower half part of the blanking pipe is inclined towards the outer side of the delivery pipe; a feed screw is arranged in the delivery pipe, and one end of the feed screw, adjacent to the discharging opening, is connected with the output end of a motor; a voltage stabilizer is radially connected on the delivery pipe and adjacent to one end of the motor; the blanking pipe is radially connected at one end of the air pipe and an air blower is connected at the other port of the air pipe; the lower half part of the blanking pipe is obliquely connected in the air pipe and an included angle is formed between the lower half part of the blanking pipe and the air pipe; a Venturi structure is arranged at the joint between the air pipe and the blanking pipe; and a regulating valve is also arranged on the air pipe. The invention can effectively avoid the phenomenon that the coal powder is accumulated and blocked and is not delivered smoothly in the coal delivery pipeline, has the advantages of rapid, uniform and pulse-free continuous coal powder feeding and is suitable for the small and medium-sized industrial coal powder boiler systems.

Description

technical field [0001] The invention relates to a feeding device, in particular to a pulseless pulverized coal feeding device in a pulverized coal boiler system. Background technique [0002] At present, the feeding device in the traditional pulverized coal boiler system is generally provided with a single-head coal feeding screw device under the outlet of the pulverized coal storage bin, and a vertically downward screw device at the end of the coal feeding screw device. The drop pipe is connected with the air pipe, so that the pulverized coal in the drop pipe is blown into the boiler by the wind force in the air pipe. The disadvantages of this kind of feeding device are: long coal powder supply intervals, slow and uneven coal feeding speed, and at the same time, because the feeding pipe is vertically arranged, the coal powder fed into the air pipe will accumulate, which is not conducive to Blowing pulverized coal into the boiler furnace will cause uneven combustion in the ...

AI Technical Summary

Problems solved by technology

The disadvantages of this kind of feeding device are: long coal powder supply intervals, slow and uneven coal feeding speed, and at the same time, because the feeding pipe is vertically arranged, the coal powder fed into the air pipe will accumulate, which is not conducive to Blowing pulverized coal into the boiler furnace will cause uneven combustion in the boiler furnace

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