Combustion gas bleeding probe, and method for running the probe

Abstract

[Problems] Provided is a combustion gas bleeding probe, which is elongated in lifetime and improved in chlorine removing ability and so on. [Means for Solving Problems] The combustion gas bleeding probe (1) comprises a cold gas discharge means having a plurality of discharge ports (2b) for discharging cold gases (C) substantially perpendicularly of the suction direction (S) of a combustion gas (G) and toward the center of the combustion gas flow. A vector (A), which is composed of momentum vectors (MVs) of the cold gas (C) discharged individually from the plural discharge ports, has a vertically downward component. This vertically downward component of the synthesized vector is made the larger, as the angle between the suction direction of the combustion gas and the flow direction of the combustion gas before sucked by the probe becomes the closer to a right angle. The vertically downward component of the synthesized vector is made the smaller, as the suction direction of the combustion gas and the flow direction of the combustion gas before sucked by the probe become the closer to parallel. Two to six discharge ports can be arranged in a plane normal to the sucking direction of the combustion gas by the probe.

Description

technical field [0001] The present invention relates to a combustion gas extraction pipe and its operation method, in particular to a combustion gas extraction pipe and its operation method used in cement kiln chlorine bypass equipment, etc., and the cement kiln chlorine bypass equipment is used for The kiln exhaust gas flow path from the end of the kiln to the cyclone separator at the lowest stage extracts a part of the combustion gas and removes chlorine. Background technique [0002] In the past, among chlorine, sulfur, alkali, etc., which are the cause of problems such as clogging of preheaters in cement manufacturing equipment, chlorine is particularly problematic. Therefore, chlorine is removed by extracting a part of the combustion gas from the vicinity of the entrance cover of the cement kiln. Chlorine bypass equipment. Furthermore, with the increase in the usage of chlorine-containing renewable resources in recent years, the amount of chlorine carried into the ceme...

AI Technical Summary

Problems solved by technology

[0007] However, when using a cross-flow cooling type tube having a high chlorine removal capacity such as the combustion gas extraction tube described in Patent Document 1, the combustion gas to be extracted or contained in the combustion gas will The dust in the tube causes a bias flow in the tube or the secondary mixing cooler, which induces wear of the tube or a skewed distribution of the gas temperature in the tube, thereby shortening the life of the tube or reducing the performance.

[0008] In addition, in order to prevent the wear of the tube or the uneven distribution of the gas temperature in the tube, an anti-friction plate or an anti-drift plate may be provided, but the expected degree of effect cannot be obtained.

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