JPS5930738A - Automatic control device for water granulation facilities - 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 automatic control device for the amount of water blown in a fracking facility for pulverizing molten slag discharged as a by-product from a blast furnace.

In conventional water crushing equipment of this kind, there was no device to automatically control the amount of water blown to match the amount of slag produced, so in most cases the amount of blown ice was kept constant. Therefore, even though the slag output rate is constantly changing, the amount of blown ice is constant, so the water ratio (Q water - 1), which is one of the fracking conditions, is unstable, and There is wide variation in the quality (vitreous quality, volume, particle size, moisture, etc.) of the produced product Sufugu Ruri, and waste is consumed in driving water pumps and slurry pumps. In addition, skilled workers visually determine the flow velocity of slag flowing through the slag gutter based on their experience and intuition.
There are methods to control the amount of ice blowing by instructing the operator and changing the number of pumps, but since this is done manually, it lacks accuracy and creates a poor working environment.
If the slag output speed is significantly increased, there are many problems such as having to bypass the slag to the single-driller bit, which necessitates work under high temperatures and in places with poor work environments such as dust and fumes.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic control device for fracking equipment that detects a fluctuating slag output speed and automatically supplies water with an amount of blown ice commensurate with the amount of slag output. .

For this reason, the configuration of the present invention includes a device for detecting the flow rate of slag, a device for detecting the amount of blown water, and a ratio calculation that calculates the amount of blown ice with respect to the slag flow rate as a water ratio based on the detection signals from both of these devices. A control device inputs a signal from the arithmetic unit, compares it with a set water ratio, and controls the water pump so as to reduce the deviation therebetween.

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

The drawings show one embodiment of the present invention, and in the drawings,
1 is a blast furnace, 2 is a taphole (slag opening), 3 is a slag gutter, 4 is a blow box, 5aFi first slag gutter, 5b is a second slag gutter,
5C is a sixth slag gutter, and 6 is a load detector. The second slag gutter 5b is separated from both slag gutter 5a and 5C in terms of weight so as not to be affected by the weight of the slag gutter 5a and 50 on both sides, and the load detector 6 is riding on top of.

7 is a stirring tank, 8 is a slurry pump, 8a is a driving motor for the pump 8, 8b is a speed signal transmitter for the motor 8a, 9
10 is a water supply tank, 10 is a water supply pump that supplies water to the blowing box 4, LOa is a driving motor for the pump 10, 10b is a speed signal transmitter for the motor 10a, 11' is a water supply flowmeter, and 11a is the flowmeter. A water supply flow rate transmitter 12 inputs the flow rate signal from 11 and transmits a signal corresponding to the amount of water supplied, and 12 inputs signals from the load detector 6 and the water supply flow rate transmitter 11a and transmits a signal to the second slag gutter 5b. A weight calculation unit 13 calculates the slag flow rate of the slurry flowing through the slag, and a ratio calculation unit 14 calculates the amount of blown ice to the slag flow rate as a water ratio based on the signal from the calculation unit 12 and the signal from the water supply flow rate transmitter 11a.
is a controller to be described later, 15 and 15 are speed setting devices, 16 and 1 are
6 is a variable control device, 17 is a slurry pipe, 18 is a water supply pipe, and 19 is a flow rate alarm.

In the automatic control device for fracking equipment configured as shown in the figure, slag produced as a by-product from the tap or slag opening of the blast furnace 1 flows down the slag trough 3 and enters the blowing box 4. . On the other hand, the blowing water enters the blowing box 4 through the water supply pipe 18, where the blown slag becomes slurry and is transferred from the first slag trough 5a to the second slag trough 5b to the third slag. Gutter 5
c flows down and reaches the stirring tank 7.

Now, let the slag flow rate (weight) be W, the amount of ice blown (weight) W2, the weight of the second slag gutter 5b be W3, and the total weight of these be W, then w=w+w+w...(1 ) 1 2 5 and this total weight W is detected by the load detector B when the slurry passes through the second slag gutter 5b. and,
The following equation (2) is obtained from the above equation (1).

w, = w − (w2 + w3) ・ ・ ・(2
) Here, W is detected by the load detector 6 as described above, and W
2 is detected by the water supply flow rate transmitter 11a from the flow meter 11, and W
3 is already known, the weight calculator 12 calculates the slag flow rate W in equation (2) above, and this output signal is sent to the ratio calculator 1.
Send to 3. This ratio calculator 13 also receives the signal of the ice blowing amount W2 from the water supply flow rate transmitter 11a, so that
The water ratio R shown by the following equation (3) is calculated.

That is, the weight calculator 1-2 calculates the slag flow rate W1, the ratio calculator 13 calculates the water ratio R, and this output signal is sent to the controller 14.

Then, the rotation speed of the motor 10a of the water feed pump 10 is controlled by the speed setting device 15 and the variable control device 16, and the rotation speed of the motor 10a of the water supply pump 10 is controlled in accordance with the slag flow rate so that there is no deviation between the water ratio and the set value. The amount of ice blowing is controlled so that the amount of ice is constant. -! a speed setting device 15 and a variable control device.

16 controls the rotational speed of the motor 8a of the slurry pump 8, thereby controlling the amount of slurry. If the deviation between the output of the ratio calculator 16 and the amount of blown ice measured by the flowmeter 11 exceeds a certain value that is safe for operation, a warning is issued by the flow rate alarm 19 to prompt emergency work. can. Additionally, this alarm can automatically switch the slag switching damper to divert the slag to the dry pit.

If the slurry transportation means is a method other than a pump method, for example, a rotary dewatering method, the rotation speed of the motor of the drive device of the rotary dewatering device and the attached slurry transport device should be controlled to match the amount of slurry to be processed. It is possible to achieve a higher rotation speed and save labor.

As described above, the present invention has a device that detects the flow rate of slag and the amount of blown ice and keeps the water ratio constant, so the amount of blown ice is automatically adjusted to match the fluctuations in the amount of slag, and the amount of blown ice is adjusted automatically. The quality of the granulated slag can be made uniform, and unnecessary power consumption is eliminated, resulting in energy savings.

[Brief explanation of the drawing]

The figure is an elevational view showing an embodiment of the present invention in the form of a flow sheet. 4... Blown box, 5a, 5b, 5c... Water slag gutter, 6... Load detector, 10... Water supply pump, 1
0a...Pump drive motor, 10b...Motor speed signal generation signal, 11...Water supply flow meter, 11a,
...Water supply flow rate transmitter, 12...Weight calculator, 13.
...Ratio calculator, 14...Controller, 15...Speed setting device, 16...Variable control device, 18...Water supply piping.

Claims (1)

[Claims] 1. A device for detecting the flow rate of slag, a device for detecting the amount of blown ice, and detection signals from both devices. A ratio calculator that calculates the amount of blown ice to the slag flow rate as a water ratio, and a control that inputs the signal from this calculator and compares it with the set water ratio to control the water pump so that the deviation between the two is reduced. An automatic control device for water fracturing equipment, consisting of a device.