Rapid door-closing device for outlet of coal mill, and coal pulverizing system of coal mill

Abstract

The invention discloses a rapid door-closing device for an outlet of a coal mill, and a coal pulverizing system of a coal mill. The rapid door-closing device for the outlet of the coal mill comprises a rectangular sealed box body, two first sealing plates, baffle mechanisms, a transmission mechanism, a drive device, and an annular sealing air tube, wherein the rectangular sealed box body is welded between two sections of pulverized coal conveying pipelines through two bottom surfaces; the two first sealing plates are arranged on two opposite side surfaces of the rectangular sealed box body; each baffle mechanism is composed of a plurality of baffles and a plurality of rotary shafts, the two ends of each of the plurality of rotary shafts are fixed on the other two opposite side surfaces of the rectangular sealed box body respectively in parallel, and the first sealing plate and the rotary shafts are located in the same plane; an L-shaped notch is arranged in one side of the upper bottom surface of each baffle and in the opposite side of the lower bottom surface respectively along the direction of the rotary shafts; the transmission mechanism is connected with the plurality of rotary shafts respectively; the drive device is connected with the transmission mechanism; the annular sealing air tube sleeves the outer side surface of the rectangular sealed box body, a sealing air access port is arranged in the outer side surface of the annular sealing air tube, a plurality of sealing air inlets are arranged in the inner side surface of the annular sealing air tube, and sealing air is introduced into the rectangular sealed box body through the sealing air inlets.

Description

technical field [0001] The invention relates to the pulverizing system technology in an electric boiler, in particular to a coal pulverizer outlet quick-closing device and a coal pulverizing system. Background technique [0002] In the power plant boiler of the positive pressure direct blowing pulverizing system, a certain number of pulverizer pipes are connected between the outlet of the pulverizer and the burner. Generally, a single pulverizer of a four-corner tangential boiler is equipped with four pulverizer pipes, and the front and rear walls The single pulverizer of the opposed combustion boiler is equipped with 4-6 powder conveying pipes. According to the direction of the airflow, the coal mill outlet speed closing device, resistance adjusting device (shrinkage cavity), pulverized coal sampling device, wind speed measuring device, etc. are generally installed in sequence on the powder conveying pipeline. [0003] The quick-closing device at the exit of the coal mill ...

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a coal mill exit speed closing device and a coal mill pulverization system to solve the limited installation position caused by too short pulverized pipeline and the resulting uneven pulverized coal flow and inconsistent field test data. Accurate Questions and Reduce Costs

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