JPS59129382A - Measuring device for temperature of charge into furnace - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for measuring the temperature of contents in a furnace.

BACKGROUND OF THE INVENTION Measuring the temperature of contents inside a blast furnace, such as coke and ore, is important for efficiently operating a blast furnace.

However, conventionally, there is no method to directly measure the temperature of the contents in the furnace, and heat transfer calculations are performed in the height direction of the blast furnace using the measured temperature values of the gas in the furnace. was estimated.

Therefore, it is desired to develop a device that directly measures the temperature of the contents in the furnace.

From the above-mentioned viewpoint, the present invention provides a temperature measuring device that can easily and reliably measure the temperature of the contents in a furnace, and includes a waveguide whose tip end is closed with a refractory material. a water-cooled tube fixed around the waveguide, a microwave radiometer that converts the microwaves received by the waveguide into an electrical signal, and a microwave radiometer that converts the electrical signal from the microwave radiometer into a temperature signal. It is characterized in that it is composed of a display device that converts and displays one image.

One embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of one embodiment of the present invention.

In FIG. 1, l is a waveguide whose tip is closed with a refractory 2, 3 is fixed around the waveguide l, and the waveguide 1 is cooled.
A water-cooled pipe that has the effect of reinforcing kneading as well as a.
For example, 4. converting microwaves received by a 4-piece waveguide into an electrical signal. '7 CIHz (C band band) microwave radiometer, 5 is a waveguide] and microwave radiometer 4
and -6d: a display that converts the electrical signal from the microwave radiometer 4 into width and displays it.

When the waveguide l of the temperature measuring device having the above configuration is inserted horizontally into the blast furnace 7 as shown in FIG. The wave enters the microwave number 4 from the tip of the waveguide 1 through the waveguide 1 and the waveguide cable 5, where it is converted into an electrical signal.

This electrical signal is converted into temperature by two indicators and is displayed as the temperature of the contents in the furnace.

The relationship between the output voltage V from the Micro Osaka radiometer 4 and the temperature of the contents in the furnace shows a proportional relationship as shown in the following equation since the wavelength of one microwave is extremely long.

■-ε・n-T+b ・(]) However, ε is the emissivity of the furnace contents in the microwave region.

O,, b: constant.

Therefore, it is assumed that the 1-display device 6 has a calculation function of the above equation (1) and a function of displaying the calculation result.

The waveguide] is cooled by the water-cooled tube 3, so even if the waveguide 1 is inserted into the furnace, it will not be damaged by heat, and since it is reinforced by the water-cooled tube 3, the waveguide will not be damaged by the contents inside the furnace. The pipe 1 will not be damaged.

Since the tip of the waveguide 1 is closed with a refractory 2 whose microwave transmittance is close to 1, the contents of the furnace are prevented from entering the waveguide 1.

FIG. 3 shows an example of the temperature distribution of the contents in the furnace in the radial direction of the furnace when the temperature measuring device is inserted horizontally into the furnace,
FIG. 4 shows an example of a temporal change in the temperature of the contents in the furnace when the temperature measuring device is horizontally fixed in the furnace.

As explained above, according to the present invention, the following effects are brought about.

■ It is possible to directly measure the X-4 degree of the contents in the furnace with high accuracy without being affected by the gas in the furnace. This is because the emissivity of the reactor gas is approximately O in the 1d microwave region, so the output signal from the microwave radiometer is an output signal due only to the microwaves emitted from the solid reactor contents. It is from.

■ Unlike infrared radiation thermometers, it does not use a lens system, so there is no problem of measurement errors due to lens dirt.

■ Unlike an infrared radiation thermometer, as is clear from equation (1), the output time is linear, so the temperature range from room temperature to 1500
The measurement altitude range is wider than that of an infrared radiation thermometer, up to ℃.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the temperature measuring device of the invention, FIG. 2 is an explanatory diagram showing the usage state of the device, and FIG. 3 is a radial direction of the furnace interior. A diagram showing the temperature distribution of an object,
゛Figure 4 is a diagram showing temporal changes in the temperature of the contents in the furnace at one point in the furnace. In the drawing. 1... Waveguide 2 Fireworks 3... Water-cooled tube 4... Microwave radiometer 5... Waveguide cable 6 Display device 7... Blast furnace applicant Natsu Shioya, representative of Nippon Kokan Co., Ltd. Husband (and 2 others) Manabu 1 Figure 3 Port 3 Figure 1

Claims (1)

[Claims] a waveguide whose tip end is closed with a refractory material, a water-cooled tube fixed around the waveguide, a microwave radiation side that converts the microwave received by the waveguide into an electrical signal, and the microwave 11 Temperature measurement device for furnace contents, characterized by comprising a display device that converts an electric signal from a radiometer into temperature and displays it.