JPS6339626Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a drainage nozzle for detecting gas leakage in coolers such as cooling boxes, tuyeres, or cooling staves of blast furnaces, etc., and can easily remove bubbles of gas in the furnace mixed into the drainage water of the cooler. The purpose is to ensure visual detection and early detection of damage to the cooler.

Damage to the cooler during blast furnace operation can cause explosions and cooling of the furnace due to flooding inside the furnace.
Various inspections are carried out for early detection of cooler damage. Currently, the methods listed below are used for this inspection.

Monitoring changes in water supply flow rate Monitoring changes in water supply pressure Monitoring changes in waste water temperature Visual inspection of coolers that can be visually inspected Monitoring with a water leak detector Monitoring the amount of hydrogen gas with a furnace top gas analyzer Collection and analysis of gas in waste water Inspection of cloudiness of wastewater Among the above, monitoring of changes in water supply flow rate, pressure, or temperature of wastewater is supplementary, and the methods listed above are effective for early detection of damage. The present invention relates to a drainage nozzle for inspecting the whiteness of wastewater as described above.

If the cooler is damaged during operation, the gas in the furnace will enter the interior through the damaged part, and the cooling water discharged from the drain nozzle attached to the end of the drain pipe of the cooler will contain bubbles and become cloudy. In addition, if the damage is large, the water discharge state becomes a blowout state. A method for checking whether the cooling water is cloudy is a method for detecting damage to the cooler by checking the condition of the cooling water drain.

However, when performing this inspection method conventionally,
Turbulent flow occurs due to the resistance of the valve installed in the middle of the drain pipe or the thermometer inserted into the drain pipe, as well as corrosion caused by water and water stains, and this turbulent flow becomes a swirling flow at the outlet of the drain nozzle and is discharged. As a result, there is more splashing and the water flow becomes thicker and wider. As a result, it is difficult to distinguish between the normal state of water discharge and the cloudy and blown water conditions caused by damage to the cooler, resulting in a delay in discovering damage to the cooler.

In order to prevent this, it is possible to make the drainage nozzle longer to suppress the above-mentioned scattering and spread of water flow, but there are significant restrictions on height and width around the blast furnace body, so in reality, it is difficult to make the drainage nozzle long. It is impossible to do so. Furthermore, increasing the length of the drainage nozzle is correspondingly uneconomical.

The present invention was developed in view of these points, and by installing a flow rectifier in the drain nozzle, it is possible to effectively prevent the above-mentioned turbulent flow without making the drain nozzle long, thereby making it possible to check the cloudiness of the drain water. This makes it easy and accurate to do so.

Embodiments of the present invention will be described below based on the drawings. FIG. 1 is a schematic diagram of the cooling device. 1 is a cooler such as a cooling box, tuyere, or cooling stave;
2 is a water supply pipe, 3 is a drain pipe, and 4 is a drain nozzle, which in this embodiment is detachably attached to the end of the drain pipe 3 via a pipe joint 8. 5
is a drain gutter, 6 is a valve, and 7 is a thermometer. Cooling water is supplied from a water supply pipe 2 to a cooler 1, where it undergoes heat exchange, passes through a drain pipe 3, and is drained from a drain nozzle 4 to a drain gutter 5. In the present invention, the drainage nozzle 4 is equipped with a rectifier 10 therein. Embodiments of this rectifier 10 are shown in FIGS. 2 to 4. The one shown in FIG. 2 is a cross-shaped current plate 11 in which a pair of current plates are combined in a cross shape. The one shown in FIG. 3 has a configuration in which a small diameter pipe 12 smaller in diameter than the nozzle 4 is inserted into the center of the nozzle 4 with its tip and end aligned, and this small diameter pipe 12 is supported by a cross-shaped rectifying plate 13. There is. Furthermore, the rectifier 10 shown in FIG.
In this configuration, a conical needle-shaped rectifying rod 14 is inserted into the nozzle 4, and this rectifying rod is supported by a cross-shaped rectifying plate 15.

It is desirable that the rectifying plates 11, 13, 15, the small diameter pipe 12, the rectifying rod 14, and the nozzle 4 be made of a smooth, corrosion-resistant material to prevent corrosion caused by water or adhesion of water scale.

Note that the arrow in the figure indicates the flow direction of wastewater.

Since the drainage nozzle according to the present invention is constructed as described above, even if turbulent flow or swirling flow occurs in the drainage pipe 3 due to the influence of the valve 6, thermometer 7, etc., the flow is rectified by the rectifier 10. This effectively prevents scattering and spreading of water flow. Therefore, it is possible to easily and accurately distinguish between waste water in a normal state and waste water that has become cloudy or blown out due to damage to the cooler 1, and early detection of damage to the cooler is possible. In addition, although it has such an effect, there is no need to increase the length of the drain nozzle, and it has excellent effects such as being extremely preferable for use around a furnace body where space is limited.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a cooling device, Fig. 2 shows an embodiment of the drainage nozzle according to the present invention, in which a is a plan view, b is a front sectional view, and Fig. 3 is another embodiment of the drainage nozzle according to the present invention. FIG. 4 shows a further embodiment of the drainage nozzle according to the present invention, in which a is a plan view and b is a front sectional view. 1 is a cooler, 2 is a water supply pipe, 3 is a drain pipe, 4 is a drain nozzle, 5 is a drain gutter, 6 is a valve, 7 is a thermometer, 8 is a piping joint, 10 is a rectifier, 11, 13,
15 is a cross-shaped rectifying plate, 12 is a small diameter pipe, and 14 is a rectifying rod.

Claims (1)

[Scope of utility model registration request] A drainage nozzle for detecting gas leakage, which is attached to the end of a cooling water discharge pipe of a furnace body cooler and is equipped with a rectifier inside.