JPH0564700U - Slag flow monitoring device at the outlet - Google Patents

Abstract

(57) [Summary] [Purpose] A slag flowing out of the outlet of a furnace is soared from the outlet by a monitoring device that is monitored by a camera facing the through hole of the surrounding wall surrounding the outlet. It is possible to prevent dust from adhering to the camera or through holes and obstructing the field of view. A dust-proof gas is fed from a dust-proof gas feeding mechanism along a lens tube in a camera, and dust is prevented from adhering to the lens tube. High-pressure gas is instantaneously flown from the high-pressure air supply mechanism into the through hole of the surrounding wall, and the dust accumulated there is blown off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a slag flow monitoring device for slag outlets of various furnaces, for example, slag outlets of waste incinerator ash melting furnaces, for monitoring the slag flow flowing out from the slag outlets.

[0002]

[Prior Art]

 As shown in FIG. 2, a dust-proof surrounding wall 5f surrounding the outlet 2f of the furnace 1f is provided with a through hole 6f for viewing the slag flow 3f flowing out from the outlet 2f from the outside of the surrounding wall 5f. The lens tube 10f of the surveillance camera 7f can be seen in the through hole 6f, the slug flow 3f can be seen through the through hole 6f, and the lens tube 10f can be positioned between the through hole 6f and the lens tube 10f. A state is created in which there is a gap for circulating the dust adhesion prevention gas, and a dustproof gas feed mechanism 15f for circulating the dustproof gas along the lens tube is connected to the gap. ing.

In such a slag flow monitoring device at the outlet, the camera 7f can monitor the slag 3f flowing out from the outlet 2f by tilting the furnace 1f. Further, during the operation of the furnace 1f, the dust-proof gas flowing along the lens tube 10f can prevent dust from adhering to the lens tube 10f and excessive temperature rise of the lens tube 10f.

[0004]

[Problems to be solved by the device]

 However, the amount of dust-proof gas flowed as described above is minimized in order to prevent the temperature of the outflow slag from decreasing. Then, in the vicinity of the through hole 6f, the dust flows due to the flow of the dustproof gas, so that the dust will be accumulated in the through hole 6f with the lapse of time, and the field of view of the camera 7f will be narrowed. There was a problem that would end up.

The present invention has been made in order to solve the above-mentioned problems (technical problems) of the prior art. High-pressure gas can be instantaneously caused to flow through the through holes to blow away the accumulated dust. It is an object of the present invention to provide a slag flow monitoring device for a slag outlet that can remove accumulated dust in the through hole without lowering the temperature of the slag flowing out.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the slag flow monitoring device at the outlet of the present invention has a dust-proof surrounding wall surrounding the outlet of the furnace, wherein the slag flow flowing out from the outlet is outside the surrounding wall. A through hole is formed for viewing from above, and the lens tube of the surveillance camera is provided in the above through hole for preventing dust from adhering to the lens tube between the inner peripheral surface of the through hole and the outer peripheral surface of the lens tube. Insert it in a state where there is a gap for gas flow, and in the gap, a slag at the outlet that is connected to a dust-proof gas feed mechanism for flowing the dust-proof gas along the lens tube. In the flow monitoring device, a high-pressure air supply mechanism for instantaneously flowing a high-pressure gas for blowing out dust accumulated in the through-hole is connected to the through-hole.

[0007]

[Action]

 The surveillance camera monitors the slag flowing out from the outlet. The gas from the dustproof gas supply mechanism flows along the lens tube to prevent dust from adhering to it and excessive temperature rise of it. The high-pressure gas, which is instantaneously flown from the high-pressure air supply mechanism into the through hole, blows off the dust accumulated in the through hole.

[0008]

【Example】

 An embodiment of the present application will be described below with reference to FIG. Reference numeral 1 is a furnace, 2 is its outlet, 3 is a slag flow flowing out of the outlet 2, and 4 is dust rising from the outlet 2. Reference numeral 5 is a surrounding wall that surrounds the outlet 2. It may be formed so as to surround the entire furnace 1. Reference numeral 6 denotes a through hole formed in the surrounding wall 5, which is formed at a position facing the outlet port 2. The position is set to the position most suitable for monitoring the slag flow 3 flowing out from the outlet 2. Next, 7 is a surveillance camera, which is attached to the surrounding wall 5 using a connecting flange 8. Reference numeral 9 denotes a case of the camera 7 in which the main body of the camera is housed. Reference numeral 10 is a lens tube in the camera 7. The lens tube 10 has a lens 11 at its tip for looking into an object to be monitored, and a relay lens for guiding the light received from the lens to the camera body inside. The lens tube 10 is inserted from the outer side of the surrounding wall 5 (left side in the figure) to the middle portion of the through hole 6. The insertion depth is determined in consideration of the required field of view 12 and the strength of heat received from the furnace 1 and the slag flow 3, and may be shallower or deeper than the illustrated case. Reference numeral 13 denotes a gap left between the inner peripheral surface of the through hole 6 and the outer peripheral surface of the lens tube 10, which is a portion for circulating the dustproof gas. In this example, the gap 13 is formed on the entire circumference of the lens tube 10. However, when the gap is interrupted at a part of the periphery, that is, a part of the outer peripheral surface of the lens tube 10 is a part of the inner peripheral surface of the through hole 6. In some cases, there is a contact with the portion or there is an inclusion between the outer peripheral surface and the inner peripheral surface in a part of the periphery of the lens tube 10.

Next, 15 shows a dust-proof gas feed mechanism connected to the flange 8. The mechanism 15 is connected to the clearance 13 through a ventilation hole provided in the flange 8. Reference numeral 16 denotes a gas communication pipe in the dust-proof gas supply mechanism 15, one end of which is connected to the vent hole of the flange 8, a pressure reducing valve 17 is provided in the middle, and the other end is a high-pressure gas not shown. It is connected to a source (eg compressor, gas generator or gas cylinder). Reference numeral 18 indicates a high-pressure air supply mechanism connected to the flange 8. In this example, the mechanism 18 is configured by commonly using the dust-proof gas supply mechanism 15 and some members (the pipe 16 and the high-pressure gas source), and is provided through the vent hole of the flange 8. Is connected to the through hole 6. Reference numeral 19 denotes a solenoid valve in the high-pressure air supply mechanism 18, which is a solenoid valve of a type capable of instantaneously supplying high-pressure gas for a very short time, for example, a pulse solenoid valve, and is connected in parallel with the pressure reducing valve 17. .. The high-pressure air supply mechanism 18 may be configured in a system different from the dust-proof gas supply mechanism 15 and connected to the through hole 6.

In the above configuration, in the operation of the furnace 1, the high pressure dust-proof gas (for example, air or nitrogen) from the high pressure gas source is decompressed by the pressure reducing valve 17 while passing through the pipe 16. The depressurized gas is gently fed into the gap 13 through the ventilation hole of the flange 8. The gas flows along the lens tube 10 in the direction of the arrow 20 to prevent the dust 4 from adhering to the lens tube 10 (in particular, the lens 11 at the tip), cool the lens tube 10 by air, and cool the surrounding wall 5 and the furnace 1. It prevents the lens tube from being heated excessively by the high temperature ambient gas (eg, 500 to 600 ° C) during the period. The amount of dust-proof gas flowed as described above is required to prevent dust from adhering to the lens tube 10 and prevent excessive temperature rise so as not to cool the furnace 1 and the slag flow 3. Set to minimum.

When the slag is discharged from the outlet port 2, the condition of the slag flow 3 flowing out is monitored by the monitoring camera 7. In this case, since the adhesion of dust to the lens 11 is prevented as described above, the field of view is clear.

When dust adheres and accumulates on the inner peripheral surface of the through hole 6 as indicated by reference numeral 21 with the passage of time, the removal is performed as follows. The solenoid valve 19 is momentarily opened. Then, the high-pressure gas from the high-pressure gas source instantaneously flows into the through hole 6 through the conduit 16 and the solenoid valve 19 only for a short time when it is open. The high-pressure gas flows at high speed in the direction of the arrow 20 in the through hole 6 and blows off the accumulated dust 21. As described above, the instantaneous length of time during which the high-pressure gas flows is preferably set to the minimum necessary length for blowing off the accumulated dust 21. It is better to set the time mechanically in advance. The high-pressure gas may be passed once or repeatedly. In the case of repeating a plurality of times, the camera 7 may be used to intermittently flow while observing the state of the accumulated dust 21 until the accumulated dust 21 disappears from the field of view. Further, the blow-off work of the accumulated dust 21 as described above is performed by, for example, an artificial judgment whenever the accumulated dust 21 increases. Alternatively, for example, the timer may be set periodically to set the time.

[0013]

[Effect of the device]

 As described above, according to the present invention, when the slag flow 3 is discharged from the outlet port 2, the slag flow state can be monitored through the lens tube 10 of the camera 7 inserted into the through hole 6 of the surrounding wall 5. Of course,

Even when the lens tube 10 is used for monitoring as described above, when the furnace 1 is in operation, the dust-proof gas is fed from the dust-proof gas supply mechanism 15 along the lens tube 10. By flowing the dust, it is possible to prevent the dust 4 rising from the outlet 2 from adhering to the lens tube 10 and maintain a clear visual field in the case of the above-mentioned monitoring, and to prevent the lens tube 10 from overheating. It has the effect of preventing it and improving its durability.

Further, when the dust 21 is accumulated in the through hole 6 due to the use over time and the field of view of the camera 7 is narrowed, a high pressure gas is instantaneously discharged from the high pressure air supply mechanism 18 into the through hole 6. The accumulated dust 21 can be blown away and blown away, which has the effect of regaining a wide field of view.

Moreover, although the accumulated dust 21 is blown off by the high-pressure gas as described above, when the dust is blown off, the high-pressure gas flow is instantaneously passed, that is, for a very short time as described above. Therefore, there is also an effect that the work of regaining the wide field of view can be performed without lowering the temperature of the outflowing slag.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a slag flow monitoring device.

FIG. 2 is a vertical cross-sectional view showing the relationship between a furnace and a conventional slag flow monitoring device.

[Explanation of symbols]

 2 Dust outlet 5 Surrounding wall 6 Through hole 7 Camera for monitoring 10 Lens tube 15 Gas supply mechanism for dust prevention 18 High pressure air supply

Claims (1)

[Scope of utility model registration request] 1. The enclosure wall for dust protection surrounding the outlet of the furnace comprises:
A through hole is formed for viewing the slag flow flowing out from the outlet from the outside of the surrounding wall, and the lens tube of the surveillance camera is provided in the through hole, and the inner peripheral surface of the through hole and the outer circumference of the lens tube. Insert in a state where there is a gap between the surface and the lens tube to prevent dust adhesion to the lens tube, and in the gap, for the dust prevention gas to pass the dust prevention gas along the lens tube. In the slag flow monitor of the outlet connected to the gas supply mechanism, the through hole is provided with a high-pressure gas supply mechanism for instantaneously flowing a high-pressure gas for blowing away dust accumulated in the hole. A slag flow monitoring device at the outlet, characterized by being connected.