Blockage removing device and method for pneumatic ash conveying pipe

Abstract

The invention relates to a blockage removing device and a method for a pneumatic ash conveying pipe in a gas bag-type dedusting system of a blast furnace. The blockage removing device comprises an ash conveying air source (7) and an air inlet valve (2) which are communicated with the ash conveying pipe (8). The blockage removing device is characterized by also comprising a negative-pressure reverse pumping valve (1) with a closing valve, and a pressure detecting unit (4) which is arranged on the ash conveying pipe (8) and used for controlling the opening and closing of the air inlet valve (2) and the negative-pressure reverse pumping valve (1), wherein the negative-pressure reverse pumping valve (1) is arranged on the ash conveying pipe (8). The blockage removing device can conveniently solve the problem of ash blockage on the ash conveying pipe by adopting the blockage removing method of positive-pressure inflation and negative-pressure reverse pumping and can automatically remove blockage, thereby improving the work efficiency of the ash conveying system.

Description

technical field [0001] The invention relates to a blocking removal device and method for a pneumatic ash conveying pipeline, in particular to a blocking removing device and a method for an ash conveying pipeline used by a blast furnace gas bag filter to transport dust to an ash bin. Background technique [0002] In the blast furnace gas bag dust removal and pneumatic ash conveying technology, the dust removed from the blast furnace gas through the bag filter is transported to the ash bin through the pneumatic ash conveying pipeline. Due to the nature of the dust, the configuration of the pneumatic conveying device, the uncertainty and operation of the pneumatic ash conveying process, it is often difficult to avoid the blockage of the ash conveying pipeline. When this kind of pipe blocking phenomenon occurs, the currently commonly used blocking removal method is to open the intake valve arranged on the ash conveying pipe and fill the ash conveying pipe with nitrogen, but the ...

AI Technical Summary

Problems solved by technology

Due to the nature of the dust, the configuration of the pneumatic conveying device, the uncertainty and operation of the pneumatic ash conveying process, it is often difficult to avoid the blockage of the ash conveying pipeline.

When this kind of pipe blockage occurs, the current common method of removing blockage is to open the intake valve installed on the ash conveying pipe and fill the ash conveying pipe with nitrogen, but the effect of removing blockage is not good.

Because once the pipe is blocked, the material plug will be formed in the pipeline, and the gas will make the material plug stronger. Therefore, in actual operation, we only need to find the blockage point and disassemble it to dredge the pipeline. This will not only affect the normal operation of the ash conveying system, but also increase maintenance work. It is one of the outstanding problems in the operation of the pneumatic ash conveying system

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