JPS5933811B2 - Sounding device for municipal waste melting shaft furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sounding device for a municipal waste melting shaft furnace that can change the gas flow distribution in the furnace.

In melting shaft furnaces where municipal waste is processed, it is necessary to detect the falling state of the contents in the furnace, and the measuring rod method or dead weight block method used in steelmaking blast furnaces is used as a sounding device for this purpose. seems to be available.

This method involves inserting a measuring rod or a weight blocker into the furnace, placing it on the top of the furnace charge, and lowering it together with the charge.
Remote instructions are given by a sershin transmitter directly connected to the wire drum, but in the case of a blast furnace, the distribution of the charge is normally controlled in order to change the gas flow distribution in the furnace.

Conventionally, as a control method, when equipped with a bell-type charging device, a movable armor method is used, and when a bell-less charging device is equipped, a rotating chute method is used. The falling charge is dropped to a predetermined position by hitting a collision plate made of heat-resistant and wear-resistant cast steel installed at the furnace mouth or a self-lining stone box. The material is applied to a rotating chute installed at the furnace mouth and dropped to a predetermined position by changing the number of turns and angle of the chute. However, it is difficult to obtain good results when applied to a mixture of miscellaneous materials with various shapes or specific gravity, such as municipal waste.

This invention has been made in view of the current situation, and provides a sounding device for a municipal waste melting shaft furnace that can change the gas flow distribution in the furnace by forcing the gas inside the furnace to flow to the outer periphery at the same time as sounding. It is intended to.

Next, an example of the present invention will be described with reference to the drawings.
In FIGS. 1 and 2, a furnace top hopper 1 for receiving urban waste 10 is arranged above a melting shaft furnace 8,
A furnace top shutter 4 is installed in the middle of the hopper so that it can be opened and closed by a power cylinder 7 for opening and closing the furnace top shutter, and a garbage packet 9 that can be opened and closed at the bottom 11 can be transported and placed on the top of the hopper. .

Further, the upper part of the hopper can be covered with a furnace lid 3 which can be lifted by a furnace lid hoist 6, and furthermore, a sounding weight 2 according to the present invention can be lifted and lowered by a sounding hoist 5. It is freely suspended so that it can be inserted into the furnace during sounding.

Therefore, the garbage packet 9 filled with municipal waste is transported to the furnace top hopper 1, and the furnace lid 3 and the sounding weight 2 are lifted up and removed by the respective hoisting machines 6 and 5 in advance. A packet 9 is placed on top, the packet bottom 11 is opened on the furnace top shutter 4 which is closed in the hopper, and the municipal waste 10 is dropped, the packet is moved, and then a sounding weight is placed. At the same time, the furnace lid 3 is lowered to cover the furnace top hopper 1.

Next, when the furnace top shutter 4 is slid, the municipal waste 10 is charged into the furnace, and the saunsing weight 2 is lowered so that the municipal waste position (stock line) 12 can be measured.

The diameter of the weight is 1/1 of the inner diameter of the shaft furnace 8.
By selecting 4 to 3/4, a gas flow space can be secured between the inner wall of the furnace and the inner wall of the furnace.

As mentioned above, since the sounding weight 2 is located at the center of the furnace, the gas inside the furnace is forced to flow around the furnace, and the averaged gas flow distribution prevents plastics in the garbage from welding to the furnace wall. Unloading may be irregular, but since the garbage can be quickly combusted over charcoal, such problems do not occur.

To describe an example of the saran body weight according to the present invention, when the furnace diameter is 120CrIL, the weight diameter is 50C.
A good result was obtained by using a steel disk with a thickness of 3 CrrL and a thickness of 3 CrrL, but since the furnace peripheral area/furnace cross section = 0.826 and the above value is 1.00 when there is no weight. ,1
10.826-1/1 = 0.21, or 21% more marginal flow.

Moreover, since the drum of the sounding hoisting rock rotates in response to the descent of the weight, the stock line can be detected by measuring the number of revolutions thereof.

As described above, according to the present invention, by changing the ratio of weight diameter/furnace diameter without controlling the distribution of the charge, the gas flow in the furnace can be freely made to the periphery. Since it is possible to achieve hot firing and also to reliably sound the descending state of the charge, it has great value in industrial applications.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the charging situation of municipal waste showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the measuring situation. 1... Furnace top hopper, 2... Sounding weight, 3... Furnace lid, 4... Furnace top shutter, 5...・Sounding hoist, 6・
... Furnace lid hoisting machine, 7 ... Power cylinder for opening and closing the furnace top shutter, 8 ... Melting shaft furnace, 9
... Garbage packet, 10 ... Municipal garbage, ) 11 ... Bottom of packet, 12 ... ---
・Municipal garbage location (stock line).

Claims (1)

[Claims] 1. A sounding for a shaft furnace for melting municipal waste, characterized in that a sounding weight consisting of a steel disc with a diameter of 1/4 to 3/4 of the inside diameter of the furnace can be freely lowered and lifted up into the furnace by a hoisting machine. Device.