JP2566347B2 - Gasification furnace slag emission status monitoring device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slag discharge status monitoring device for a gasification furnace applied to commercial and industrial coal gasification equipment.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional device. In FIG. 3, a burner 6 is provided in the combustion furnace 1 which forms a peripheral wall by the furnace wall tube 4.
Is installed, and pulverized coal and char are charged. The ash content in these fuels is accumulated as molten slag at the bottom of the combustion furnace 1 and flows down from the slag hole 2 to the slag hopper 3 below. Cooling water is poured in the slag hopper 3,
The system configuration was such that the molten slag that fell down was cooled and solidified and discharged from the lower part to the outside of the system.

In such a gasification facility, it is important to surely discharge the molten slag from the slag hole, but in order to monitor it, conventionally, a slag hole monitoring television camera installed below the slag hole 2 is used. By 7,
The situation was monitored visually.

[0004]

The conventional device has the following problems. (1) Since the atmosphere below the slag hall is dirty, the visibility of the TV camera is poor and it is not possible to fully grasp the slag discharge status. (2) In TV cameras, it is necessary to introduce cold air for sealing or cooling, but the slag hole is cooled by such cool air introduced below the slag hole,
This cools and solidifies the molten slag and hinders the discharge of the slag.

The present invention is intended to solve the above problems.

[0006]

A slag discharge condition monitoring apparatus for a gasification furnace according to the present invention comprises a combustion furnace having a slag hole for discharging molten slag at its bottom, and cooling water provided below the combustion furnace. In a gasification furnace equipped with a slag hopper filled with the slag hopper, a hydrophone provided in the slag hopper and a measuring instrument to which the hydrophone is connected are provided.

[0007]

In the above, since all the molten slag flowing out from the slag hole of the combustion furnace falls into the cooling water in the slag hopper, the dropping sound is continuously detected in the water by the hydrophone and measured by the measuring instrument. By that,
The presence or absence of slag discharge from the slag hole can be monitored. In addition, the sound detected in water varies depending on the amount, size, temperature, etc. of the falling slag, and the measuring equipment accumulates and analyzes the data, which enables accurate monitoring of the slag discharge status. Becomes

From the above, it is possible to accurately grasp the discharge situation of the molten slag from the slag hole, and the slag hole is cooled by the cooling air used as in the case of using a conventional TV camera, and the slag is discharged. Is not hindered, the safety during operation of the gasification furnace is improved.

[0009]

FIG. 1 shows a first embodiment of the present invention. In the present embodiment shown in FIG. 1, a combustion furnace 1 in which a peripheral wall is formed by a furnace wall tube 4 to which a lower furnace header 5 is connected and a burner 6 is provided, and a slag hole 2 provided at the bottom of the combustion furnace 1 are provided. , And a slag hopper 3 provided below the slag hole 2 and provided with the slag hopper 3 filled with the cooling water 15, in the cooling water 15 inserted into the guide pipe 11 provided on the side wall of the slag hopper 3. A hydrophone (underwater microphone) 8 for detecting underwater sound, and a measuring device 10 having one end connected to the hydrophone 8 and the other end of the lead wire 9 passing through the guide pipe 11 and the compression fitting 12 are connected. ing.

In the above, pulverized coal and char are charged into the combustion furnace 1, and the ash content in these fuels is melted by the slag 14
As a result, it accumulates at the bottom of the combustion furnace 1 and flows down from the slag hole 2 to the slag hopper 3 below.

Since all the molten slag 14 flowing out from the slag hole 2 drops into the cooling water 15 in the slag hopper 3, the drop sound is continuously detected by the hydrophone 8 in the water, so that the slag hole is detected. It is possible to monitor whether or not the slag 14 is discharged from No. 2. In addition, the sound detected in the water is the amount of the slag 14 that falls,
It also varies depending on the size, temperature, etc. By accumulating and analyzing the data, it becomes possible to accurately monitor the discharge state of the slag 14.

From the above, it becomes possible to accurately grasp the discharge status of the molten slag from the slag hole.
The safety during the operation of the coal gasification furnace is improved, and the slag hole is cooled by the cooling air used as in the case of using the conventional TV camera, and the discharge of the slag is not hindered.

In this embodiment, the hydrophone is installed in the guide pipe for protection and is cooled by the cooling water. However, these may not be necessary depending on the atmospheric conditions of the installation.

A second embodiment of the present invention is shown in FIG. In the present embodiment shown in FIG. 2, a slag crusher 13 for generating sound is provided below the hopper 3 in the first embodiment,
This is applied when it is difficult to distinguish the noise and the slag drop sound by this. In addition to the hydrophone 8, another hydrophone 8a is installed near the noise source and the other hydrophone 8a The other end of the lead wire 9 which is connected to the inside of the guide pipe 11 and passed through the compression fitting 12 is connected to the measuring instrument 10, and the measuring instrument 10 relatively processes each detected sound to identify the slag falling sound. The other actions and effects are similar to those of the first embodiment.

[0015]

EFFECTS OF THE INVENTION In the slag discharge condition monitoring device of the gasification furnace of the present invention, the molten slag flowing out from the slag hole of the combustion furnace falls into the cooling water in the slag hopper, and the falling sound is detected by the hydrophone and measured. By measuring and monitoring with a container, it becomes possible to accurately grasp the discharge situation of molten slag from the slag hole, and the slag hole is cooled by the cooling air used as in the case of using a conventional TV camera. Since the discharge of slag is not hindered, the safety during operation of the gasification furnace is improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a slag device according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram of a conventional monitoring device.

[Explanation of symbols]

 1 Combustion Furnace 2 Slag Hole 3 Slag Hopper 4 Furnace Wall Tube 5 Lower Furnace Heading 6 Burner 8, 8a Hydrophone 9 Lead Wire 10 Measuring Instrument 11 Guide Pipe 12 Compression Fitting 13 Slag Crusher

Claims (1)

(57) [Claims] 1. A gasification furnace equipped with a slag hole for discharging molten slag at the bottom, and a slag hopper below the combustion furnace and filled with cooling water, wherein the slag hopper is provided. Hydrophone,
A gasifier slag discharge status monitoring device comprising a measuring instrument to which the hydrophone is connected.