JPS63169316A - Multiple point measuring probe in shaft furnace - Google Patents

Abstract

PURPOSE:To obtain a multiple point measuring probe in shaft furnace, where multiple points can be measured at a low cost, by providing multiple point changing mechanism for plural gas introducing holes and thermocouples inserted as facing to end points of this introducing holes. CONSTITUTION:The multiple point changing probe 2 arranges plural guide introducing holes 11a-c and the sheath thermocouples 12a-c is inserted facing the end point of each introducing hole 11. And, after inserting this probe 2 toward the radius direction of shaft furnace 1, a guide tube 4 is sent out from a connection device 3 to descend together with the material 5 charged in the furnace, and the furnace condition is detected during this process. After completing the detection, the tube 4 is removed from the device 3 and the charged material is melted in the process of smelting reduction. Further, the tube 4, in which the furnace gas is flowed at the time of measuring, and the sheath thermocouples 6 inserted in this tube 4 are each connected with a thermocouples 6, thermometer 7, gas analyzer 8 and gas pressure gage 9.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application) The present invention relates to a multi-point measuring consumable probe for shaft furnaces such as blast furnaces.

(Prior art) In shaft furnaces such as blast furnaces, unloading of raw materials becomes unstable due to deterioration of raw material properties, etc., and heat exchange between the furnace gas and raw materials cannot be performed stably. Otherwise, slips occur frequently.

In order to fully understand the cause of this and maintain stable operation, consumable measuring gloves have been developed to measure the temperature, gas pressure, gas components, etc. of each layer of raw material in the furnace.

For example, as shown in Japanese Unexamined Patent Application Publication No. 58-221208, a probe for measuring inside the blast furnace is installed so that it can be inserted into and taken out from the belly or morning glory part of the blast furnace at an appropriate oblique angle. As shown in Japanese Unexamined Patent Publication No. 59-16917, a conduit is built into the lance, and a flexible globe is fully guided to allow access to the blast furnace from the opening at its end. There is a method in which the blast furnace is lowered into the blast furnace, and the physical and chemical behavior inside the blast furnace can be grasped in a comprehensive manner.

Such a measurement probe hangs down from the top of the furnace and is moved out sequentially as the charge is unloaded.While buried in the charge, it detects the temperature, pressure, and all components of the furnace gas. After the measurement is completed, it is left behind and A' melts into a scene.

(Problems to be Solved by the Invention) With conventional consumable measurement probes, when measuring multiple points in the radial direction of a shaft furnace such as a blast furnace, a sheathed thermocouple for temperature measurement and a tube for gas components and gas pressure are required. It is necessary for each measurement point, and the measurement probe itself is large (and expensive), so it has the disadvantage of being expensive as a consumable glove. This will be difficult.

The object of the present invention is to advantageously solve these difficulties and provide a consumable measuring glove capable of measuring multiple points at low cost.

(Means and effects for solving all problems) The present invention has the following features:
A plurality of gas introduction holes, a thermocouple inserted into the gas introduction hole with its tip facing forward, and a multi-point switch that inputs each of the plurality of gas introduction holes and the thermocouple into one measuring transducer. The gist is that the probe has been installed, and the multi-point switching mechanism described above is connected to the gas inlet hole switching rotary switch and thermocouple switching rotary switch provided on the rotation axis of the ratchet, and the gas inlet switch connected to the ratchet's rotational power total measurement converter. This is a multi-point measurement probe in a shaft furnace that consists of gas pulse pressure introduced into a tube.

With such a configuration, for example, the material can be suspended in the furnace of a blast furnace,
When the charge is unloaded and buried in one place, and the gas temperature, gas pressure, gas composition, etc. are measured at multiple points in the radial direction inside the furnace, the gas introduction pipe to the measurement converter installed outside the furnace is used. Regardless of the number of measurements, only one gas inlet pipe and one pair of thermocouple wires are required, and the switching mechanism operates reliably even at high temperatures around 1,000 Orr. It is something.

(Example) The details of the present invention will be explained with reference to the example shown in FIGS. 1 and 2.

FIG. 2 is an overall diagram of the configuration of the present invention, showing the temperature inside the blast furnace 1,
In order to measure gas components and gas pressures at multiple points in the radial direction of the furnace, a multi-point switching probe 2 having multiple gas introduction holes shown in FIG. 1, which will be described later, is inserted in the radial direction of the furnace.

The inserted globe 2 is let out by the guide tube 4 from the connecting device 3, and is lowered together with the charge 5 charged into the furnace, and the above-mentioned situation inside the furnace is detected during the lowering process.

After the detection is completed, the guide tube 4 is removed from the connecting device 3, and disappears together with the melting and reduction of the contents 5 in the furnace.

The guide tube 4 through which the furnace gas flows during measurement and the sheathed thermocouple 6 inserted into the guide tube 4 are
It is connected to a thermometer 7, a gas analyzer 8, and a gas pressure gauge 9, respectively.

10 is a switching gas cylinder for the multi-point switching probe 2.

FIG. 1 shows the entire configuration of the multi-point switching probe 2, and the multi-point switching probe 2 has a plurality of gas introduction holes n(aL (bl,).

(C) are provided, facing the tip of each gas introduction hole 11, and sheathed thermocouples 12 (al, (bl,
(Cl is inserted.

Each gas introduction hole 11 [a), fb), fc) is connected to the connection hole 13 (a) of the fixed connection part 13 of the rotary switching mechanism.
l, 1] bl, 13 (attached to C1,
In addition, each sheathed thermocouple 12 (al, (bl, (C
1 is extracted from the middle of each gas introduction hole 11, and the sliding part 14ia) of the fixed sliding plate 14 of the rotary switching mechanism is
14 (bl.

14 (+) line to cl, sliding plate 14 (dl (-)
) wires are connected respectively.

On the other hand, one connection hole 15 (a) of the rotary switching mechanism that switches all the gas inlet holes, and the rotating sliding brushes 16 and 17 that switch all the sheathed thermocouples are fixed to the ratchet gear 180 and the rotating shaft 19. ing.

This rotating shaft 19 has a cylindrical shape, and the guide tube 4
are connected throughout the cylinder, the (+) wire of the sheathed thermocouple 6 inserted therein is connected to the brush 16, and the (-) wire is connected to the plan I7.

The switching operation is as shown in FIG. Fully compress the partition plate 22 connected to the piston 21 of the cylinder, press the spring 23, lower the stepping bar 24 connected to the piston 21, and move the ratchet gear!8 Th 1
Rotate the frame and stop.

One frame rotation angle of the ratchet gear 18 and the connection hole 13 (al) of the fixed part connection part 13 of the rotary switching mechanism.

fbl, (C), the rotation angle of the rotating part 15, the fixed sliding plates 14 (a), (b), (c), and the rotation angle of the rotating brush 16 are designed to match accurately. This allows for sequential switching without any deviation.

After the switching is completed, the pulp xo (at k
Closed 1:.

When the gas pressure is lowered, the stepping bar 24 is raised and the ratchet gear 18 is fully automatically fixed by the stopper 5 for preventing reverse movement.

Next, the pulp 8 (al) of the gas analyzer 8 and the valve 9 (al) of the gas pressure gauge 9 are fully opened and measurement is started.

Since the normal gas pressure in the blast furnace is 2 to 3 ky/cm2, the pressure in the gas cylinder 10 at the time of switching is reversed at a higher pressure, and in this example, the pressure is 7 kl/cm2.
Performed in cm2.

Since the high pressure is fed back in this way, the dust contained in the in-furnace gas is generated in each inlet hole 11[a].

(bl, (The fact that C1 and the guide tube 4 are occluded also has the advantage that they can be completely cleaned.

The switching gas does not need to be specified in particular, but it remains in the guide tube 4 after being affected by the blast furnace or immediately after switching.
N2 gas that does not affect the analyzer 8 is preferable.

It goes without saying that the switching can easily be configured to be automatic if required, and confirmation of the switching can be read by recording the pressure pulses of the pressure gauge 9.

With the above configuration, in this example, it was possible to measure the temperature, gas composition, and total gas pressure inside the blast furnace at multiple points in the radial direction of the furnace, which was useful for analysis of blast furnace operation.

(Effects of the Invention) As described above, the present invention is a consumable measuring probe that can measure all points in the radial direction of a shaft furnace, and can be manufactured compactly at low manufacturing costs, and is useful for operations in shaft furnaces such as blast furnaces. It has all kinds of useful effects.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view of a glove of the present invention in an embodiment, and FIG. 2 is a detailed explanatory view of the same embodiment of the present invention. 1: Blast furnace 2: Multi-point switching globe 3: Connection device 4 Guide tube 5: Charge
6, ]2(al, tbl, (cl
: 'i-s thermocouple 7: Thermometer 8 = Gas analyzer 9: Gas pressure gauge 10: Gas cylinder 1
1(ai, (bl, FCl: gas introduction hole 13
:Fixed connection part l3fa), (bl, (cl)
: M connecting hole 14: Fixed sliding plate 14 (at, (
bl, (c): Sliding part 15: Rotating connection part 1
s(al: Connection hole! 6, 17: Rotating sliding brush 1
8: Ratchet gear 19: Rotating shaft 20 Niji cylinder 21: Piston 22: Partition plate 23
: Spring 24: Stepper 25 = Stopper

Claims (1)

[Scope of Claims] 1. A plurality of gas introduction holes, a thermocouple inserted into the gas introduction hole with its tip facing forward, and one measurement conversion unit for each of the plurality of gas introduction holes and the thermocouple. A multi-point measurement probe for shaft furnaces equipped with a multi-point switching mechanism for input to the instrument. 2. The multi-point measurement probe for a shaft furnace according to claim 1, wherein the multi-point switching mechanism comprises a gas introduction hole switching rotary switch and a thermocouple switching rotary switch provided on the rotating shaft of the ratchet. 3. The multi-point measurement probe in a shaft furnace according to claim 2, wherein the rotational driving force of the ratchet is a gas pulse pressure introduced into a gas introduction pipe connected to a measurement transducer.