JPS58492B2 - It's hard to find a solution to the problem. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for measuring the amount of heat input into a continuous heating furnace.

Since the energy crisis, fuel costs have become extremely large, and the burden has increased dramatically, especially in the steel industry, which uses large amounts of fuel. It is being

Therefore, for example, in a continuous heating furnace, the temperature of the steel material per serving, the time in the furnace, the firing temperature, the thickness, the length, the set temperature in the furnace, the temperature of hot air to the burner and the air-fuel ratio, or the heating zone in the longitudinal direction of the furnace. Since there are many changing and variable factors such as each fuel input distribution and combustion burner group configuration (top, bottom, left and right, near and far, etc.), it is difficult to understand which factors caused the fuel consumption rate to change and how. Appropriately and accurately understanding the situation, planning optimal operations, and improving operations and equipment in order to reduce the fuel consumption rate within a range that can be maintained continuously are being highlighted as important issues.

However, current fuel consumption management in continuous heating furnaces is carried out over large time frames such as each quality of steel, each work shift, each day, each month, etc., as there is no appropriate device to measure the amount of heat input to heat the steel. It is not possible to understand which factors and how the fuel consumption rate changed.

That is, even in the fuel consumption unit management for each type of steel material, which is currently the smallest framework, there is a large error in management because there are other product groups before and after heat treating one product group.

For example, in a continuous heating furnace used in a high-volume production line of a small number of products, an average of 1,800 tons of steel of the same type is almost continuously supplied, and an average of 1,300 tons of the same or two types of steel are constantly being heat-treated in the furnace. There will be large errors at the top.

The present invention provides an excellent steel material heating input calorific value measuring device that advantageously solves these problems, and its features are as shown in an embodiment of the present invention shown in the figure. ~an, at least a steel position detection device 1 for detecting the moving position in the longitudinal direction within the heating furnace H; (2) each steel position detection signal a, aα~a from the steel position detection device 1;
ε is introduced, and the weight WX of the steel material S is stored in accordance with the position detection signals a, aα to aε, and the total weight W1 to W4 of the steel material S in each heating zone H1 to H4 in the longitudinal direction of the heating furnace H is stored.
A heating zone steel weight calculation device 2 that sequentially calculates the weight of steel material in a heating zone; (2) a fuel flow rate measuring device 3 that measures fuel input flow rates Q1 to Q12 in each heating zone H1 to H4 in the longitudinal direction of the heating furnace;
．． 3-1 to 3-12, ■ Total weight of steel in each heating zone H1 to H4 from the heating zone steel weight calculation device W1 to
W4 is introduced at predetermined time intervals, and each time at the next introduction point 4, the fuel input flow rate (Ql, 02) for each heating zone H1 to H4 from the fuel flow rate measuring device 3.3-1.3-12 is determined.
, (Q3Q4), (Q5.Q8), (Q9.Q12),
is introduced into each heating zone H1 to H4 or, as in this example, to each burner group C1 to C12 in each heating zone H1 to H4, based on the total weight of the introduced steel, the calorific value of the input fuel per unit weight of steel Kc -1 to Kc-12; (2) a position detection signal a of each steel material S in the longitudinal direction in the furnace from the steel material position detection device 1;
aα to aε are introduced, and the calorific value calculation device 4
Calorific value of input fuel per unit weight of steel material (Kc-1-Kc-
12) is installed in a steel material heating input amount measuring device for a continuous heating furnace, which is provided with a steel material side input fuel calorific value integration device 5 that integrates and integrates.

That is, the present invention provides a steel material heating input amount measuring device that continuously and accurately grasps the heat receiving history in the furnace at least per unit weight of each steel material charged into a continuous heating furnace, heated, and extracted. This allows us to precisely determine how the fuel consumption rate changes depending on the steel material charging time, furnace time, firing temperature, thickness, length, hot air temperature to the furnace set temperature burner, air heat ratio, etc. In addition to accurately and appropriately controlling the various elements, it is also possible to alleviate skid marks and increase the amount of fuel input by distributing the fuel input to each heating zone in the longitudinal direction of the heating furnace. It is also possible to improve the accuracy and rationalize the temperature control for baking steel materials, and to advantageously optimize the operation and equipment of the heating furnace.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings, and an embodiment of the present invention will be described in detail.

As shown in the diagram, the continuous heating furnace H of this example is a walking beam type, and there is a first heating zone H from the charging side to the extraction side.
It is composed of four heating zones: 1, 277th twisting zone H2, and third heating zone H3 (hereinafter referred to as soaking zone) H4.

The first heating zone H1 and the second heating zone H2 have an upper burner group, a lower burner group, and a third
The heating zone H3 and the soaking zone H4 have burner groups (both not shown) on the left and right sides of the upper and lower parts, respectively.

Further, the steel material S is charged into the furnace by a pusher H5, and the steel material S is transported within the furnace by being transferred onto a fixed beam H7 and a walking beam H6 by rectangular movement of a walking beam H6.

The steel position detection device 1 is a detector (MD
and the steel material extrusion operation of pusher H5 (i.e. forward movement)
The pusher forward movement amount transmitter 1a detects the movement amount signal and sequentially transmits the movement amount signal, and the pusher forward movement amount transmitter 1a detects the steel material conveyance movement (i.e., upward horizontal forward movement and upward horizontal return movement) of the walking beam H6 and transmits the movement amount signal. It is equipped with a walking beam steel material conveyance amount transmitter 1b that sequentially transmits the information, a detection position setting device 1, and counters a1 to a for the maximum number of steel materials to be charged.
Each of the counters a1 to an turns ON in response to a detection signal ON from the detector CMD, and when turned ON, receives a movement amount signal from the pusher forward movement amount transmitter 1a. A predetermined amount 11 (i.e., the amount by which the steel material S is moved by the pusher H5 from the position detection start position to a position where walking beam type conveyance can be started and where it approaches the immediately preceding steel material at a predetermined interval) is counted, and a steel material charging position signal aα is generated. (In other words, the first heating zone H1 entrance end position signal is transmitted, and from this point on, the conveyance movement amount signal from the walking beam steel conveyance amount transmitter 1b is counted, and this continuous count amount is the total conveyance of the first heating zone H1. When the movement amount matches 12, the second heating zone H2 person side end position signal aβ is set, and when the total transport movement amount of the first heating zone H4 and second heating zone H2 matches 12, the third heating zone H
3. The input side end position signal aγ is calculated from the total conveyance movement amount 13 of the first heating zone H1, second heating zone H2, and third heating zone H3.
If they match, the input side end position signal aδ of the soaking zone H4 is transmitted, and when the corresponding steel material S is extracted after passing through the soaking zone H4, a detection signal is sent from between the detectors provided above the extraction position. In response to this, an extraction signal aε is transmitted.

Total conveyance movement amount to each counter a1-an 11, 12,
Settings 13 and 14 are performed by a detection position setter 1c whose set value can be adjusted.

The heating zone steel material weight calculation device 2 is provided with weight storage units b1 to bn corresponding to each of the counters a1 to an of the steel material position detection device 1, and each of them is turned on by a steel material charging position signal aα from the corresponding counter. Operate the corresponding steel material S
The weight value Wx is introduced from the steel material heating instruction section 6 and stored, and the stored weight value Wx is introduced into the first heating zone Yamauchi steel total weight calculation section H1 and added to the contents, and then the second heating The input end position signal aβ of zone H2 is subtracted from the contents of calculation section H'1, and is introduced into calculation section H6 of the total weight of steel in the second heating zone H2 and added to the contents, and then the total weight of steel material in the third heating zone H3 is subtracted from the contents of calculation section H'1. It is subtracted from the content of the calculation unit H4 using the side end position signal aγ, and is introduced into the calculation unit H'3 for the total weight of the steel material in the third heating zone H3 to obtain the content.

Then, the soaking zone H4 entrance end position signal aβ
This is subtracted from the content of the calculation unit H3 by using the extraction position signal aε, and is also introduced into the calculation unit for calculating the total weight of steel materials in the soaking zone H4, and then subtracted from the content of the calculation unit H4 using the extraction position signal aε.

Both erase the stored weight value Wx in the corresponding steel material storage section.

Calculation part H of the weight of the pot W in each heating zone above! 1 to W4 are steels that sequentially add the weights Wx of the steel materials S entering the heating zone, and exit from the heating zone based on the contents of the addition results.

The weight Wx of the material S is sequentially subtracted, and the total weight W1 to W4 of the steel material S present in the corresponding heating zone is successively calculated and transmitted to the corresponding section of the calorific value calculation device 4.

The fuel flow rate measurement device 3 includes a detection element (not shown, the same goes for other supply mains) in the fuel supply main of the upper burner group (not shown, the same goes for other supply mains) for the first heating zone H1. ), and a flow rate measuring device 3-2 with a detection element interposed in the fuel supply main pipe of the lower burner group are provided. Similarly to the above, flow measuring devices 3-3 and 3-4 are provided for each of the upper and lower burner groups, and detection elements are installed in each fuel supply main pipe of the left and right burner groups of the upper and lower parts for the third heating zone H3. An interposed flow rate measuring device 3-5.3-6.3-7゜3-8 is installed, and the soaking zone H
4, a flow meter for each of the upper, lower left and right burner groups, similar to that for the third heating zone H3, 3-
9.3-10.3-11.3-12 installed.

The calorific value calculation device 4 includes flow rate measuring devices 3-1 to 3-1 for each burner group in each heating zone H1 to H4.
2, and a calculation unit c connected to the calculation units H1 to H4 of the corresponding heating zone of the heating zone steel weight calculation device 2, respectively.
-1 to c12 are provided, and the fuel flow rate measurement values from the corresponding flow rate measuring devices 3-1 to 3-12, that is, the fuel input flow rates Q1 to Q12 to the corresponding burner groups are introduced into each of these, and this is measured at predetermined time intervals. The calorific value of the input fuel is calculated by integrating the same predetermined time and multiplying this cumulative flow value by the calorific value per unit flow rate of the corresponding fuel.
The total weight W1 to W4 of the steel material in the zone, which is successively transmitted from 1 to H'4, is read at each predetermined time, and the corresponding burner for the steel material S in the corresponding heating zone H1 to H4 is determined based on this and the above-mentioned input heat value. This is to calculate the calorific value Kc-1 to Kc-12 of the input fuel per unit weight from the group.

The input fuel calorific value accumulating device 5 for each steel material has integrated units d1 to dn for each steel material corresponding to the respective counters a1 to an of the steel material position detection device 1, in which the steel material S is stored in each heating zone in the process of passing through the furnace. Group integration units 5-1 to 5-12 are provided that individually integrate the input fuel calorific value per unit weight received from each burner group H1 to H4, and each integration unit d1 to d
n is turned ON by the steel material charging position signal aα from the corresponding counters a1 to an, and the group integrating unit 5- for each additional burner group in the upper and lower portions of the first heating zone H1.
1.5-2 to operate the corresponding calculation unit c1. The input fuel calorific values Kc-1 and Kc-2 per unit weight of steel material are sequentially introduced into the first heating zone H1 from c2 and then integrated into the input side end position of the second heating zone H2 from the corresponding counters a1 to an. It is stopped by the signal aβ and the accumulated value up to now is held.

On the other hand, according to the signal aβ, the group integrator 5-3°5 for each burner group on the upper wall and lower wall of the second heating zone H2
-4 is activated, and the input fuel 14 calorie k per unit weight of steel material in the second heating zone H2 from the corresponding calculation units c-3 and c-4
c-1 and Kc-4 are sequentially introduced and integrated.

Next, this is stopped by the input side end position signal aγ of the third heating zone H3 from the corresponding counters a1 to an, and the integrated value is held.

At the same time, the position signal aγ is detected by the group integration unit 5-5.5-6.5-7 for each burner group at the upper left, upper right, lower left, and lower right of the third heating zone H3. By operating ゜5-8, the corresponding calculation parts c-5 and c-6cm
7. Calorific value of fuel input per unit weight of steel material in the third heating zone H3 from c-8 Kc-5, Kc-6゜Kc-7, Kc
-8 is introduced one after another and integrated.

Next, this operation is stopped by the input side end position signal aδ of the soaking zone H4 from the corresponding counters al to an, and the integrated value is held.

Further, at the same time, according to the position signal aδ, the group integration unit 5-9.5-10.5-11 for each burner group in the upper left, upper right, lower left, and lower right parts of the soaking zone H4
．． 5-12 is operated and the corresponding calculation units c-9 and c-18
, c-11cm12 Calorific value of fuel input per unit weight of steel material in soaking zone H4 Kc-9, Kc-10, Kc-1
1 and Kc-12 are successively introduced and integrated, and then stopped and held by the extraction position signal aε from the corresponding counters a1 to an.

Immediately after the above-mentioned series of integration operations in each of the integration units di to dn are completed, the statistics units d'1 to d'n operate to extract and add the integrated values held by each group integration unit 5-1 to 5-12. Then, to this added value, add the weight WX of the steel material S that was introduced and held separately using the steel material charging position signal aα.
The heating input heat amount Tk received by the steel material S while in the furnace is multiplied by
c-x is calculated and sent to the display device 7, and the corresponding display section 7-1
to 7-n to maintain the display, and reset the self and each group integration section 5-1 to 5-12 to prepare for the next steel material.

Each of the corresponding display sections 7-1 to 7-n of the display device 7 inputs the No. of the corresponding steel material S from the steel material heating command section 6 based on the steel material charging position detection signal aα from the corresponding counter a1 to an of the steel material position detection device 1. The display is also maintained, but in addition, each of the integrating sections d1 to d of the input fuel calorific value integrating device 5 for each steel material
It is also configured so that the accumulated values held by the group accumulating units 5-1 to 5-12 in n are introduced each time they are held, and are displayed and held.

Although the configuration and operation of this embodiment are as described above, the results of each product calculation in the input fuel calorific value integration device 5 for each steel material are not limited to mere display, but can be used, for example, in the fuel input flow rate control device of each burner group. It can be used as a control element to improve accuracy and rationalize steel baking temperature control, reduce fuel consumption, and control fuel input distribution, making it advantageous to optimize operations to reduce skid marks. It can be measured.

In addition, it can also be used for various types of pedestals, such as burner hot air temperature control, air combustion control, conveyance speed control of steel material S in the furnace, that is, adjustment control of the furnace time, etc., to advantageously improve precision and rationalization. It is something that can be done.

[Brief explanation of the drawing]

The figure is an explanatory diagram showing one embodiment of the present invention. H... Continuous heating furnace, 1... Steel position detection device, 2
. . . Steel material weight calculation device in heating zone, 3. Fuel flow rate measurement device, 4. Calorific value calculation device, 5. Input fuel calorific value integration device for each steel material, 7. Display device.

Claims (1)

[Claims] 1. On the steel material side, a steel material position detection device that detects the movement position at least in the longitudinal direction within the Okishima reactor, and each steel material position detection signal from the steel material position detection device is introduced and stored, and the weight of the corresponding steel material is introduced and stored in accordance with the position detection signal. and a heating zone steel weight calculation device that sequentially calculates the total weight of steel materials in each heating zone in the longitudinal direction of the heating furnace, and a fuel flow rate measurement device that measures the fuel input flow rate in each heating zone in the longitudinal direction of the force-twisting furnace. , the total weight of steel in each heating zone is introduced from the heating zone steel weight calculation device at predetermined time intervals, and each time, until the next introduction point, fuel is introduced into each heating zone from the fuel flow rate measurement device. A calorific value calculation device that calculates the calorific value of the input fuel per unit weight of steel material based on the total weight of the introduced steel material for each heating zone by introducing the flow rate within the predetermined time, and a furnace for each steel material from the steel material position detection device. A position detection signal in the inner longitudinal direction is introduced, and in accordance with the inner longitudinal direction position signal of each steel material, the calorific value of the input fuel per unit weight of steel material in the heating zone where the steel material is located is introduced from the calorific value calculation device. 1. A steel material heating input heat amount measuring device for a continuous heating furnace, characterized in that a steel material side input fuel calorific value integrating device is provided for integration.