Slag discharge condition monitoring apparatus and method for monitoring slag discharge condition

Abstract

A slag discharge condition monitoring apparatus and a method for monitoring a slag discharge condition that are capable of preventing the detection accuracy of the slag discharge condition from being lowered due to scaling-up of a coal gasification facility, especially a coal gasification furnace, are provided. A slag discharge condition monitoring apparatus (1) is arranged in a furnace facility (50) that processes molten slag produced within a furnace (51) by dripping the molten slag from a slag hole (54) provided on a furnace bottom (52) into cooling water outside the furnace. The slag discharge condition monitoring apparatus is characterized in that in the cooling water, an underwater microphone (2) is disposed at distances approximately equal from a pair of slag taps (55, 55) that are disposed opposite to each other and that cause the molten slag to flow into the slag hole (54).

Description

technical field [0001] The present invention relates to a slag discharge state monitoring device and a slag discharge state monitoring method used in commercial or industrial coal gasification facilities. Background technique [0002] In the conventional coal gasification equipment, the burned coal ash stays as molten slag at the bottom of the combustion furnace, flows out from the slag opening of the slag outlet, and falls into the slag hopper arranged at the lower part. Cooling water is stored inside the slag hopper, and the molten slag is cooled and solidified by the cooling water, and then discharged out of the system. [0003] The slag discharge status monitoring device used in coal gasification equipment is used to monitor the drop status of molten slag to the slag hopper. The following related technologies have been proposed so far. That is, the technology of monitoring the drop status of molten slag by using a video camera for monitoring, or by using An underwater m...

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Problems solved by technology

[0005] Compared with the monitoring method using the underwater microphone, the monitoring method using the video camera has the problem that the view around the slag mouth is poor, and the discharge status of the slag cannot be fully monitored, or the molten slag is also cooled and solidified by the air cooling the video camera. The problem that it is easy to hinder the discharge of slag

[0006] On the other hand, in the monitoring method using the underwater microphone described in Patent Document 1, since the installation position of the underwater microphone is not specified relative to the position of the slag discharge gap, the underwater microphone has become more and more difficult to use as the size of the coal gasification equipment increases. When the relationship with the above-mentioned water impact position changes due to the operating conditions, there is a problem that the level of sound in the water measured by the underwater microphone changes, and there is a possibility that the measurement accuracy of the slag discharge condition will decrease.

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