Double-funnel anti-blocking type feeding coal bunker for thermal power plant

Abstract

The invention discloses a double-funnel anti-blocking feeding coal bunker of a thermal power plant in the technical field of feeding coal bunkers. A large coal bunker and a small coal bunker which are of a conical barrel structure and are coaxially sleeved inside and outside are included, and an annular interlayer space between the large coal bunker and the small coal bunker is a feeding channel. A plurality of pushing mechanisms which are distributed in an annular array manner are arranged in the feeding channel, and each pushing mechanism comprises an outer conveying belt device and an inner conveying belt device. The inner side of the large coal bunker is further provided with a plurality of hydraulic connecting rod sets which are distributed in an annular array mode and used for being connected, installed and controlling the opening degree of an upper end opening of the small coal bunker in a traction mode so as to control the sectional area of a feeding end opening of the feeding channel. The upper end opening of the small coal bunker is covered with an umbrella-shaped top cover. The double-funnel anti-blocking feeding coal bunker overcomes the risk that the coal bunker is passively unblocked only after coal blockage, early warning of coal blockage can be actively performed, treatment can be performed in advance, and coal bunker blockage is prevented by reducing friction force between dropped coal and the inner wall and controlling the coal feeding amount of the coal bunker.

Description

technical field [0001] The invention relates to the technical field of feed coal bunkers, in particular to a "double funnel" anti-blocking type feed coal bunker for thermal power plants. Background technique [0002] A thermal power plant is a thermal power plant, a factory that uses coal, oil, and natural gas as fuel to produce electricity. Thermal power plants using solid fuel coal involve transportation, storage and distribution of coal. The coal bunker is one of the intermediate stations. At present, the coal bunkers of most thermal power plants adopt the "funnel type", that is, the top is wide and the bottom is narrow, which depends on the coal itself. Gravity falls to the coal feeder where the belt circulates, and then distributes to the coal mill. [0003] Due to the reduction of the "funnel" space at the bottom of the coal bunker, the raw coal is subject to "double-sided friction" and extrusion, the reduction of the cross-sectional area of ​​the coal bunker outlet l...

AI Technical Summary

Problems solved by technology

However, when the raw coal falls from the upper part of the large volume to the lower part of the small volume in the "funnel-shaped" coal bunker, the outlet cross-sectional area decreases sharply, and the raw coal is greatly squeezed. When a blockage occurs, the friction is increased, and micro The motor is overloaded, and the occurrence of coal blocking cannot be prevented in advance

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