SU771432A1 - Device for regulating cupola thermal mode - Google Patents

Description

(54) DEVICE FOR REGULATING HEAT REGIME WAGRAN

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The invention relates to devices for controlling the thermal regime of the mineral wool cupola and can be used in the building materials industry 5 in the production of mineral wool, as well as in the metallurgical industry and in a number of other areas of the national economy.

A device for controlling the thermal mode of a cupola is known, comprising a temperature sensor, a temperature controller, a correction signal generating unit, to the input of which a flow sensor t5 is connected to the blast and an air flow regulator with an actuator and regulator Sh.

However, the known device has a poor quality of regulation due to the necessity of continuously introducing into the system test influences on air flow.

Another device for regulating the thermal regime of a wagon is known, comprising a metering and charging unit for charging and fuel, a melt temperature sensor, a melt temperature controller, an air flow sensor connected to the first inlet 30.

an air flow regulator, the output of which is connected to the regulator through an actuator, and a pressure differential sensor in the charge pole of the cupola chamber {2.

A disadvantage of this device is that it does not provide the necessary ACCURACY1 and reliability of regulation. This is due to the fact that such an OST device works on the principle of compensating disturbing influences associated with a change in the resistance of the charge column during the technological process, regulating only one input parameter of air flow per blast and does not provide for adjusting the value of other input parameters, in particular, height charge post.

Claims (2)

The purpose of the invention is to improve the accuracy and reliability of regulation. This goal is achieved by the device for controlling the thermal mode of the cupola, which contains a unit for dosing and charging and fuel loading, a melt temperature sensor, a melt temperature zone, an air flow sensor connected to the first input of the air flow regulator, the output of which is connected to the regulator through the actuator, and the differential pressure sensor in the charge post of the cupola, equipped with control devices for air flow and temperature of the melt, software switch-on relay, computing unit, and sensor The height of the charge column with a moving mechanism and a control unit, the control unit. is connected to the first output of the computing unit, the first input of which is connected to the differential pressure sensor, and the second input is connected to the corresponding output of the air flow sensor, the second output of the calculating unit is connected to to the program input there are many switch-on relays, the output of which is connected to the first input of the melt temperature controller, the second input of which is connected to the melt temperature setpoint, the third input of the melt temperature controller It is connected to the melt temperature sensor, the outlet of the melt temperature regulator is connected to the second input of the air flow regulator, the third input of which is connected to the air flow setpoint device, and the charge column height sensor is connected to the metering and charging unit and fuel unit. A device for controlling the thermal mode of the cupola is shown in the drawing and contains: cupola 1, computing unit 2, pressure differential sensor 3, air flow sensor 4, sensor 5 control unit of moving the cupola column 6 sensor displacement temperature controller 7, temperature controller 8 the melt, the mechanism 9 for moving the height sensor, the unit 10 for dispensing and loading the charge and fuel, the air flow regulator 11 for blowing the air flow setting unit 12, the setting unit 13 for the melt temperature flow., the actuator 14 regulates its body 15 and the sensor 16 of the melt temperature. The device works as follows. When changing the pressure drop D in the cupola furnace, over the specified limits, the b sensor of the charge column is in the design position provided by the process technology, and controls the unit for automatic dosing and loading of the charge and fuel in accordance with the Grid program. The temperature regulator 8 is turned off . The controller 11 through the actuator 14 and the regulator 15 by the signal of the sensor 4 supports the specified flow rate of air on the blast. When changing the pressure drop by an amount Longer than a predetermined computing unit 2, the signals from sensors 3 and 4 calculate the components of pressure in the tuyere through which are related to the change in the charge of the charge column and the air flow rate, as well as their summation and gives the command to the unit 5 controls the movement of the sensor b height of charge column. At that, the sensor 6 moves until the condition is satisfied. Condition (.) RR) The direction of movement of the sensor b determines the computing unit 2. When the sensor b is moved up and out of the dense layer, the automatic dosing and charge loading unit is turned on. fuel, thereby accelerating the loading of the next portion. When lowering the sensor b downwards in the solid layer s-one, the signal that blocks the automatic dosing and loading of the charge and fuel is sent to the Bloc 10, due to which a load of the next batch is delayed. The signal produced by the computing unit 2 also goes to the program relay 7, which after a set delay time turns on the melt temperature controller 8. In case of deviation of the current value of the melt temperature, determined by the sensor 16, from a predetermined value, determined by the sensor 16, from a predetermined value set by the setting device 13, the controller 8 generates an error signal to the air flow regulator 11 on the blast . This changes the value of the installation of the latter. With a new deviation of the pressure drop by an amount greater than the specified one, the whole cycle is repeated. The invention The device for controlling the thermal mode of the cupola, contains a unit for dosing and charging and fuel loading, a melt temperature sensor, a melt temperature controller, an air flow sensor connected to the first input of an air flow regulator, the output of which is connected to the regulator through an actuator and a pressure differential sensor in the charge chamber of the cupola, characterized in that, in order to increase the accuracy and reliability of the regulation, it is equipped with air flow and temperature control devices Melt tours, software switch-on relay, computing unit, and height sensor of charge column with displacement mechanism and control unit, with the control unit connected to the first output of the computing unit, the first input of which is connected to the differential pressure sensor 1, and the second input to the corresponding output sensor second air flow the output of the computing unit is connected to the input of the programmable relay, the output of which is connected to the first input of the melt temperature controller, the second input is connected to the melt temperature setpoint, the third input of the melt temperature controller is connected to the melt temperature sensor, the output of the melt temperature regulator is connected to the second the inlet of the air flow regulator, the third inlet of which is connected to the air flow regulator. and the height sensor of the charge column is connected to the dosage and charge unit of the charge and fuel. Sources of information taken into account during the examination 1. Enno I.K. Automate the control of the cupola in the production of mineral. Construction mothers 9, M ,, 1970. USH, to 2. USSR author's certificate 481757, cl. F 27 V 1/26, 1973.