SU1435915A2 - Method of controlling feed of clay raw material into rotary furnace - Google Patents

Abstract

This invention relates to a process control technique for grinding and feeding clay into a rotary kiln. It can be used in the refractory industry. Allows you to improve the quality of management. To do this, set the maximum minimum value of the revolutions of the alumina machine and the maximum maximum value of the flow of raw material into the furnace, compare them with the current values and when the first deviates in the direction of decreasing, and the second in the direction of increasing, adjust the number of revolutions of the actuator and the height of the elevator in the direction of decrease. 1 il.

Description

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The invention relates to a process control technique for preparing and supplying clay for firing into a rotary kiln, can be used in a refractory industry, and is an improvement to the device according to the author. No. 96A402.

The aim of the invention is to improve the quality of control.

The drawing shows a diagram illustrating the described control method.

The control method is as follows.

The original clay from the hopper 1 is fed by a feeder 2, equipped with a gate 3, to the receiving device 4 of the clay machine 5, from where it goes to the conveyor 6 and then to the kiln.

The averaged signal about the value of the flow of crushed clay, taken by the balance 7, enters the raw material consumption regulator 8, where it is compared with a given value. When the measured value is disconnected from the set at the output of the regulator 8 of the raw material consumption, a signal appears that leads to a change in the number of revolutions of the drive 9 of the container of the alumina machine 5, and hence to a deviation of its performance to the set one.

When the clay reserves in the receiving device 4 exceed the limits, which are controlled, for example, using a gamma relay 10, the signal is fed to the raw material controller 11, from where it comes to the drive of the feeder 2 and the drive of the gate 3. At the same time, receiving device

4 above the norms, the regulator 11 of the stock of raw materials reduces the number of revolutions of the drive of the feeder 2 and the height of raising of the gate 3, and vice versa, before the stock of raw materials returns to the norm.

However, if there is a large amount of fines in the feedstock, the latter spontaneously pours out through the windows of the alumina cutting plate.

5 to the conveyor 6, while the current value of the flow of raw materials into the furnace can exceed the set value, regardless of the number of revolutions of the clay cutter 5, even at the minimum acceptable value.

The signal on the value of the flow of crushed clay G, taken by the scale 7, also goes to the comparison unit 12, where it is compared with the given (maximum maximum) value G.

Provided that 0 °,, at the output of the comparator unit 12, a signal appears that is applied to the coil

the relay 13, while disconnecting the contact 14, breaking the circuit between points 15 and 16 of the communication line between the controller 8 and the drive 9 of the alumina machine, opens the opening contact 17, breaking the chain between points 18 and 19 of the communication line between the gamma relay 10 and the controller 11 and the closing contact 20 closes, connecting the circuit between points 21 and 22

communication lines between the controller 8 consumption of raw materials and the controller 11 of the stock of raw materials.

The signal of the current value of the speed n of the alumina machine 5,

removed by a tachometer 23, is supplied to a comparison unit 24, where it is compared with a predetermined (extremely minimal) value n ,.

Assuming that a signal appears at the output of the comparator unit 24, which is applied to the relay coil of the 25th turn, when this is closed, the opening contact 26 is broken and the circuit between points 15 and 27 is broken.

the communication line between the regulator 8 consumption of raw materials and the drive 9 of the alumina machine, opens the break contact 28, breaking the circuit between points 18 and 29 of the communication line between the sensor

10 of the clay stock and the controller 11 of the stock of raw materials and the closing contact 30 is closed, connecting the circuit between points 22 and 31 of the communication line, between the controller 8 of the raw material consumption and the controller 11 of the stock, raw materials.

Thus, under the same conditions

G G -j,

the signal about the deviation of the current value of the flow of raw materials into the furnace from the set point (output of the regulator 8 of the consumption of raw materials) reaches the input of the regulator

11 stockpiles of raw materials, which reduces the number of revolutions of the drive of the feeder 2 and

lifting height of gate 3 to eliminate this deviation (to the equality of the current and specified flows of raw materials). Under the condition of G –i, there is no signal at the output of block 12;

the flow switch 13 is de-energized, while the closing contact 20 of the relay 13 breaks the circuit between points 21 and 22, the disconnecting contact 14 of the flow switch 13 closes the circuit between the points

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15 and 16, and the opening contact 17 closes the circuit between points 18 and 19. The feasibility of implementing the method consists in VOLUME, which increases the uniformity

feed clay with an excess of fines in the feedstock.

F o rm ula invention

The method of controlling the supply of clay raw materials into a rotary kiln

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auth. No. 964402, tl and h and with the fact that, in order to improve the quality of control, they set the maximum minimum value of the rotational speed of the alumina machine and the maximum value of the flow to the furnace compare them with the current values and when the first in the direction of decrease, and the second in the direction of increase, adjust the number of revolutions of the drive of the feeder and the height of the rise of the gate in the direction of decrease.

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Claims (1)

Claim The method of controlling the supply of clay raw materials to a rotary kiln according to ed. № 964 402, characterized in that, to improve quality control, set the pre ₅ separately minimum speed glinoreznoy machine and maximum raw value of the flux into the furnace, compare them to the current values and a deviation of the first side Yu reduce, and second to side increase adjusts the number of revolutions of the drive of the feeder and the height of the gate in the direction of reduction. L 22 21 Editor S. Baker Compiled by I. Plotnikova Tehred M. Didyk Corrector N.Korol Order 5632/38 Circulation 561 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab. ·, D. 4/5 Production and printing company, Uzhhorod, st. Project, 4