JPS6028679Y2 - Blast furnace furnace condition measuring device - Google Patents

Description

[Detailed explanation of the invention] This invention monitors the progress of the reduction reaction in the blast furnace by controlling temperature, gas pressure, and
This relates to a furnace condition measuring device for estimating and understanding gas composition etc. by actual measurement.

The unloading behavior of the raw material charged into the blast furnace and the progress of the reduction reaction accompanying this must be ascertained with the highest possible accuracy in order to properly manage the operations of the blast furnace.

To this end, various approaches have been taken in the past, and for example, the shape of the softened cohesive zone that forms inside a blast furnace is finally being clarified through a survey conducted during blast furnace dismantling.
There have been few cases in which the dynamic situation during blast furnace operation has been grasped through actual measurements.

Recently, there has been a movement to clarify the temperature distribution inside a blast furnace by actual measurement, and a one-dimensional measurement method using a vertical or horizontal sonde has been announced.

For example, a measurement probe with a temperature measuring element such as a thermocouple is sent vertically into the blast furnace using a weight attached to the tip of a wire, and the temperature is measured at the landing point of the weight, and then temperature is measured sequentially as the load is unloaded. One example is the method of following.

However, in the above method, the weight that has landed may shock the blast furnace raw materials such as iron ore or coke, and may flow into the reactor core with these raw materials or be buried in these raw materials, making it difficult to measure which point. The problem is that we do not always know exactly what is happening.

In other words, the temperature measurement point remains unspecified, so 1. Understanding the situation inside the reactor also becomes inaccurate.

On the other hand, JP-A-54-114402 discloses a technique that uses a flexible pipe with a built-in in-furnace detection element, but the measurement point is still uncertain and the problem has not been solved.

On the other hand, the present applicant had previously filed a patent application No. 55-146089.
In this paper, we proposed a new method for understanding the situation inside a blast furnace.

This proposal provides a method to accurately grasp the situation inside the furnace by setting measurement points at target positions. We focused on the fact that the measurement accuracy was reduced due to defects such as the fact that the material was mounted on the furnace, and the position on the raw material in the furnace was difficult to fix (the weight flowing in or being buried could not be avoided). A plurality of elements were formed along the length of the hard protection tube, and these were used as measurement probes.

Then, this probe is placed on the surface layer of the raw material to be loaded into the blast furnace along the radial direction of the blast furnace, fixed by the raw material to be charged next time, and lowered as the load is unloaded. The gist was to understand the situation inside the reactor by measuring at least one of them.

With this method, it was possible to grasp the data while always maintaining the correct measurement points, and it became possible to understand and control the actual operational status of the blast furnace. In carrying out the above method, we have succeeded in providing a new measuring device that can achieve the purpose more stably.

That is, the configuration of the measuring device according to the present invention is such that a measuring probe having a plurality of temperature sensing parts and/or gas sampling parts formed along its length is suspended from a moving member, and the moving member is guided into the blast furnace. A first guide pipe is provided to penetrate horizontally or diagonally downward into the blast furnace, and a second guide pipe is coaxially connected to the outside opening of the first guide pipe via a shutoff valve. A sealing mechanism is provided at the other end of the second guide pipe, a stopper for the moving member is provided at the tip of the first guide pipe in the blast furnace, and an opening for lowering the measuring probe is provided at the lower side of the tip. The gist is that a member for pulling out the moving member is provided, and a wire for lowering the measuring probe is provided for the measuring probe.

The configuration and effects of the present invention will be explained below in detail based on the drawings which are examples. However, the following example is only one specific example, and it is of course possible to make various changes to the design in keeping with the spirit described above and below. , all of which are included in the technical scope of the present invention.

FIG. 1 is a schematic vertical cross-sectional view showing a situation in which the device of the present invention is installed in a blast furnace.

In the figure, the first guide pipe 2 is fixed to a nozzle part 10 attached to a steel shell 8 of the blast furnace wall, and penetrates diagonally downward into the furnace.

A second guide pipe 3 is coaxially connected to the outside opening 2a via a shutoff valve 4, and a sealing mechanism 5 is provided at the other end 3a of the second guide pipe 3.

1 shows a measuring probe dropped onto a charge 12 in a blast furnace.

The measurement probe 1 is provided with a plurality of temperature sensing parts and/or gas sampling parts along its longitudinal direction, and when a thermocouple is connected as the temperature sensing part, and a gas sampling part is provided, a diameter of 6 to 8 mφ is provided. Steel pipes are connected.

Therefore, a large number of conductive wires and steel pipes are arranged at the rear of the measurement probe 1 (upper right side in the drawing), but only one is shown in the figure and hereinafter referred to as the connecting wire 6.

The connection line 6 is connected to the first connection line 6 mentioned above. Second guide pipe 2, 3
It is then drawn out through the sealing mechanism 5 and rolled up onto the drum 13, with its end connected to the detection device 7.

Further, a guide rope 24 for lowering the measurement probe 1 from the first guide pipe 2 into the furnace is connected to a moving member 23, which will be described later, so as to be freely drawn out.

The measuring probe 1 is inserted through the sealing mechanism 5 by the structure and means described below, and the second. First guide pipe 3, 2
The tip of the measuring probe 1 travels inside the furnace and falls onto the furnace contents 12. However, in order to achieve the purpose of the present invention, the falling position with the best measurement accuracy is when the tip of the measuring probe 1 is at the center of the furnace, that is, at the bell 9. Located near the center, the entire measurement area is the
It is necessary to face the direction of the reactor core as shown in the figure, and it is also necessary to obtain a reproducible falling position.

Factors that affect the falling position of the measurement probe 1 include the level of the charge 12, that is, the distance from the first guide pipe 2, the angle of installation of the first guide pipe, and the protrusion length of the first guide pipe 2 into the furnace. However, according to the experimental results, the level and deposition angle of the charge 12 are assumed to be constant, and the attachment angle of the first and second guide pipes 2 to the steel shell 8 is determined by the deposition angle of the charge 12. If the length of the protrusion into the first guide pipe 2 is adjusted in accordance with the mounting angle, the speed at which the measuring probe 1 enters the furnace, and the above-mentioned interval, the measuring probe 1 can be correctly positioned at the required position. It has been confirmed that it can be dropped, and the reproducibility of the drop position is extremely high.

Incidentally, since the deposition angle of the charge 12 is approximately constant depending on the furnace to which it is applied, the installation angle of the first guide pipe 2 may be fixed according to the deposition angle. It is best to make the length adjustable as needed.

That is, the first guide pipe 2 is movable relative to the nozzle section 10, and is fixed relative to the nozzle section 10 once the necessary protrusion length is determined.

Next, Figure 2 is a longitudinal sectional view of the first guide pipe and second guide pipe, and Figures 3 and 4 are ■-curve sectional views and IV
-IV line sectional view.

Two rails 16 are provided inside the first guide pipe 2 and the second guide pipe 3 on which the wheels A attached to the moving member 23 run.

Further, a stopper 25 is provided at the tip of the first guide pipe to determine the stop position of the moving member 23, and as shown in FIG. The measurement probe 1 suspended in the opening 1
It is configured so that it can be lowered into the furnace from 7.

On the other hand, the corresponding portion in FIG. 4 naturally does not require a lower opening.

FIG. 5 is a partially cutaway side view showing the structure of the moving member and the measuring probe.

Of course, the moving member 23 is provided with a pair of running wheels A at the front and rear of the pipe-shaped steel member 23, and a pair of running wheels A are provided at the front and rear of the pipe-shaped steel member 23. It is configured to be able to travel on a rail 16 provided in the second guide pipe.

Further, each of the plurality of sheaves 26 and 26 has a guide rope 24,
24 are wound.

One end of the guide rope 24.24 is attached to the second end. It is wound around a guide rope drum 27 outside the furnace through the first guide pipe, and the measurement probe 1 is connected to the other end.
1st. While the second guide pipe is running, it is suspended below the moving member 23 and runs together with the moving member 23.

The moving member 23 is first positioned by the stopper 25, and when the measuring probe 1 is dropped into the furnace, the measuring probe 1 is suspended from the sheave 26 by letting out the guide rope 24 wound around the drum 27.

FIG. 6 is a partially cutaway side view showing the measurement probe 1.
The main body of the measurement probe 1 made of a real steel pipe 14 has a plurality of detection ends 15a, which constitute a temperature sensing part, a gas suction part, etc.
15 by 15c are provided at arbitrary intervals.

Then, this measurement probe 1 connects the guide rope 24 with the brackets 28 and 28 provided at symmetrical positions on the upper surface of the measuring probe 1.
．． It is suspended from the moving member 23 by 24.

FIG. 7 is an explanatory cross-sectional view showing how the first guide pipe 2, moving member 23, and measurement probe 1 are assembled.

Rail 16.1 provided at the bottom of the first guide pipe 2
6 shows a situation in which the movable member 23 is mounted so as to be movable forward and backward using left and right wheels A, A, and the measurement probe 1 is suspended and held at the bottom thereof.

FIG. 8 is a schematic sectional view showing details of the seal mechanism 5, and the seal mechanism 5 is configured to be connected to the flange of the second guide pipe 3 at the flange 18.

Internally, sealing members 19 are provided at three locations (however, two locations are not shown in the figure), and one is provided with a connecting wire 6.1 for the measurement probe.
There is a guide rope 24 for lowering the measuring probe and now 1
Specifically, the drawing member 21 used when inserting and drawing the moving member 23 into and out of the furnace is passed through, but it is also possible to bundle three members and leave the sealing member 19 at only one location.

In addition, in order to prevent leakage of furnace gas, etc. when the connecting wire, guide rope, and pull-out member are removed from the seal member, each seal member 19 is provided with a seal cap 19.
s, and a seal cap 5a can be attached to the seal mechanism 5, respectively.

When inserting the measurement probe 1 into the furnace, the measurement probe 1 and the moving member 23 are first assembled into the second guide pipe.

That is, the shutoff valve 4 is closed to hermetically shut off the atmosphere inside the furnace.

Next, the flange 18 between the second guide pipe 3 and the seal mechanism 5 is removed to open the second guide pipe 3, and the moving member 23 with the measurement probe 1 suspended therein is inserted into the second guide pipe 3, and the wheels Place A on the rail 16.

A connecting wire 6, a guide rope 24, 24, and a pulling member 22 extend from the rear end 14a of the measuring probe 1. The rear end of the member 22 is passed through each seal member 19, 19, 19 provided on the flange 18, respectively.

Furthermore, after the measurement probe 1 is placed into the blast furnace, it usually descends about 20 to 25 yn from the charging position and continues measurement during that time, so the connection wire 6 should be approximately 40 to 507 yn to allow for a margin.
need to be prepared.

The guide ropes 24, 24 that have passed through the seal member 19 are wound around the guide rope drum 27, while the connecting wire 6 is wound around the drum 13 and its tip end is connected to the detection device 7.

Next, the flange 18 is attached to the second guide pipe 3, the inside of the second guide pipe is isolated from the outside air, and preparation for charging is completed.

The measurement probe 1 can be inserted into the blast furnace at any time during blast furnace operation using the following procedure.

That is, when the time comes, the shutoff valve 4 is first opened to allow the second guide pipe 3 and the first guide pipe 2 to communicate with each other.

The stoppers (not shown) of the drum 13 and the guide rope drum 27 are removed to allow the connecting wire 6 and the guide rope 24 to be freely released, and the drawing member 21 of the moving member 23 is pushed out.

Thereby, the moving member 23 travels on the rail 16 by the wheels A and reaches the stopper 25 provided at the tip of the first guide pipe 2.

Although it is sufficient to push out the drawer member 21 manually, it may of course be pushed out mechanically using a cylinder mechanism, a rack and pinion mechanism, or the like.

Then, the guide rope 24 is sent out to lower the measurement probe 1 into the furnace.

When the measuring probe 1 lands on the charge 12 in the furnace, the tension in the guide ropes 24,24 decreases, so that the landing can be easily detected even from outside the furnace.

Thereafter, the guide rope 24 is cut outside the seal mechanism 5, and the seal cap 1 is attached to the seal member 19 as shown in FIG.
Cover with 9S.

Since this guide rope 24 is drawn into the furnace as the measuring probe 1 descends into the furnace, even if a gap is created by passing through the sealing mechanism, the cap prevents the furnace gas from leaking.

The measuring probe 1 is unloaded with the lowering of the charge 12, and the connecting wire 6 is fed in with the lowering.

In order to know the lowered position of the measuring probe 1, the insertion length of the connecting wire 6 may be determined using a tachometer or the like attached to the drum.

Thus, the detection ends 15a, 15 of the measurement probe 1
By 15c, etc., the condition data in the radial direction of the blast furnace core can be measured in the height direction, and the temperature in the longitudinal direction of the blast furnace,
Data indicating the distribution of gas etc. is obtained by a detection device 7 outside the furnace.

After the measurement is completed, if the connecting wire 6 is cut before the sealing member 19 and the sealing cap 19s is attached, the connecting wire 6 will be dragged by the measuring probe 1 inside the furnace and fall naturally into the furnace.

Note that the stopper 25 on the rail 16 inside the first guide pipe 2
The movable member 23 left at the position is pulled up by the pull-out member 21 at any time after the end of the measurement and stored in the second guide pipe 3.

Then, the shutoff valve 4 is closed and the series of operations is completed.

Therefore, the drawer member may be rope-shaped or rod-shaped.

FIGS. 9 and 10 are diagrams illustrating the results of measuring the conditions inside a blast furnace using the device of the present invention. In FIG. They are clearly related and depicted.

Further, in FIG. 10, the temperature distribution in the center, middle, and periphery of the blast furnace is clearly shown in relation to the position in the height direction of the blast furnace.

Since the present invention is configured as described above, it is possible to easily insert and set a measuring probe having a plurality of detection ends at any position in the direction of the core of a blast furnace. The interval between measurement points always remains the same, making it possible to measure the inside of the furnace with high precision.

[Brief explanation of drawings]

Fig. 1 is a schematic vertical cross-sectional view showing the situation in which the device of the present invention is installed in a blast furnace, Fig. 2 is a longitudinal cross-sectional view of the first guide pipe and second guide pipe, and Fig. 3 is a schematic longitudinal cross-sectional view of the device of the present invention installed in a blast furnace. Line sectional view, 4th
5 is a partially cutaway side view showing the structure of the moving member and measurement probe. FIG. 6 is a partially cutaway side view showing the measurement probe. FIG. 8 is a schematic cross-sectional view of the sealing mechanism; FIG. 9 and FIG. 10 illustrate the results of measuring the condition inside a blast furnace using the device of the present invention. It is a diagram. 1... Measurement probe, 2... First guide pipe, 3... Second guide pipe, 4... Curved...
Shutoff valve, 5...Seal mechanism, 6...Connection line, 7...Detection device, 8...Iron skin,
9...Bell, 10...Nozzle part, 11
・・・・・・Out-of-furnace stage, 12・・・・Charge,
13...Drum, 14...Steel pipe, 15
...Detection end, 1'6...Rule, 17...
...Opening, 18...Flange, 19...
・Seal member, 20...Bundle, 21...
...Drawer member, 23...Movement member, 2
4... Guide rope, 25... Stopper, 26... Sheave, 27... Drum for guide rope, 28... Bracket.

Claims (1)

[Scope of utility model registration request] A measurement probe having a plurality of temperature sensing parts and/or gas sampling parts formed along its length is suspended from a movable member, and a first guide pipe that guides the movable member into the blast furnace is inserted horizontally or horizontally into the blast furnace. The second guide pipe is provided so as to penetrate diagonally downward, and a second guide pipe is coaxially connected to the outside opening of the first guide pipe via a shutoff valve, and a sealing mechanism is provided at the other end of the second guide pipe. , a stopper for the movable member is provided at the tip of the first kite vibe in the blast furnace, and an opening for lowering the measuring probe is provided at the lower side of the tip; the movable member is provided with a member for pulling out the movable member; An apparatus for measuring conditions inside a blast furnace, characterized in that a wire for lowering the measurement probe is provided in the apparatus.