SU1699967A1 - Device for regulating heat conditions in silicate cupola - Google Patents

Abstract

The invention relates to the regulation of the thermal regime of a silicate cupola, can be used in the building materials industry in the production of mineral wool and allows for improved control accuracy and reliability. The device contains a cupola 1, a regulator 2, an air flow sensor 3, a normalizing converter 4, an air consumption adjuster 5, an air consumption regulator 6, an actuator 7, a melt temperature sensor 8, a melt temperature regulator 9, a melt temperature adjuster 10, pressure sensor 11, normalizing transducer 12, first summing device 13, second summing device 14, charge height setting unit 15, exhaust gas temperature sensor 16, exhaust gas temperature regulator 17, high regulator 18 You have a charge column, a switch 19 and a dosage and loading unit for charge and fuel, and a power supply unit 21. 1 il. Yo

Description

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This invention relates to the automatic regulation of the thermal conditions of a silicate cupola and may find application in the building materials industry in the production of mineral wool.

The aim of the invention is to improve the control accuracy and reliability of operation.

The drawing shows a diagram of the device.

The device contains a cupola 1, regulator 2, air flow sensor 3, rationing transducer 4, air flow setting device 5, air consumption regulator 6, actuator 7, sensor 8, controller 9 and melt temperature setting device 10, pressure sensor 11 ( tuyere on CE), normalizing converter 12 (in tuyere on CE), first 13 and second 14 summing devices, unit 15 of the charge column height, exhaust gas temperature sensor 16, exhaust gas temperature controller 17, blend height regulator 18 will switch Spruce 19, unit 20 for dispensing and charging the charge and fuel, unit 21 for feeding.

The device works as follows.

The following technological parameters are continuously monitored: the flow rate of the air supplied to the cupola 1 is monitored by means of the air flow sensor 3; the temperature of the melt at the outlet of the cupola - using the sensor 8 temperature of the melt; pressure in the tuyere over the cupola by means of a pressure sensor 11; flue gas temperature using the flue gas temperature sensor 16.

On the unit 15 of the height of the charge column, the technological setting of the height of the charge column N3ad is set, and on the controller 17 of the flue gas temperature - the operating temperature range of the exhaust gas TGmin - TgMax

The pressure signal -PCp in the tuyeres region, whose magnitude reflects the process and gas-dynamic state of the cupola process and depends on the height of the charge column, is fed from pressure sensor 11 through a normalizing converter 12 (pressure signal) to one input of the first totalizer 13. To another input The first summing device 13c of the output of the normalizing converter 4 (air flow) is supplied with the air flow signal Pb, which is measured by the air flow sensor 3. The first totalizer 13 calculates

the pressure component L characterizing the change in the height of the charge column, and supplies the component AR to one input of the second summing device 14, to the other input of which from the pressure sensor 11 through the normalizing converter 12 pressure is fed the component of the signal AP, which characterizes the nonlinearity of the height of the charge column from air flow. The second summing device 17 calculates the pH value А Р-Д Р1, characterizing the current value of the height of the charge column Hi, in relative units, for example,

percent, and delivers the value of PH to one of the inputs of the regulator 18 of the height of the charge column, to the other input of which the specified value H3ad is supplied from the setting unit 15. When the condition that indicates a decrease in the height of the charge column below a predetermined level, the regulator 18 gives a command through the switch 19 to the dosage and loading unit 20 at the beginning of the loading. e.

Simultaneously with the execution of the loading program, the melt temperature at the outlet of the cupola is corrected and the air flow is stabilized.

In case the temperature of waste

gases at the output of the sensor 16 is in a predetermined range TGmin - TGmax, then in the contour of control and correction of the melt temperature, including the melt temperature sensor 8, the regulator 9 and the setpoint controller 10

melt perature, the bond between

five

the regulator 9 and the air flow setting device 5 are open through the switch 19, thereby, the melt temperature is not corrected, and the control loop and

5 stabilization of the air flow, including the air flow sensor 3, the setting device 5, the air flow regulator 6, the actuator 7 and the regulator 2, turn on and provide the set flow rate

0 air mounted on setpoint 5.

In case the temperature of the exhaust gases, controlled by the temperature sensor 16, is lower than Tgmin or higher than TgMax, the Tgmin-Tgmzx range goes out of the working range, which indicates a violation of the gas dynamic mode of the cupola process and a possible deviation of the melt temperature from the cupola output from Tzad, olegulor 17 waste gas temperature

changes the task on the unit 15 of the height of the charge column to a predetermined weight:

At the same time, through the switch 19, the melt temperature controller 9 is connected to the air flow setting unit 5 under the condition that the melt temperature deviates from the set value Tzad. The melt temperature is corrected by changing the air flow setting on the setter 5 by the melt temperature regulator 9, while the air flow regulator 6 through the actuator 7 by means of the regulator 2 changes the amount of air supplied to the cupola. melt temperature at the outlet of the cupola at reaches Tzad.

As a result, a new task for air flow is set at the air flow adjuster 5, which is kept constant in contour stabilization when the melt temperature correction circuit is turned off,

The correction circuit is disabled when Tzad is reached by f. interrupting communication between the controller 9 and the setting device 5 via the switch 19.

When performing a melt temperature correction operation, the device simultaneously maintains the height of the charge column at a new level indicated on the setting unit 15.

The device improves the reliability of operation and the accuracy of the system control, ensures the prompt change in the task height of the charge column, and stabilizes the basic output parameters of the silicate cupola — the melt temperature and productivity.

Claims (1)

Invention Formula A device for controlling the thermal regime of a silicate cupola containing a pressure sensor, an air flow sensor, a melt temperature sensor, a melt temperature controller with a corresponding setpoint, a flow regulator air with the appropriate setting device, the first summing device, the regulating body with the actuator, the unit for dosing and loading of the charge and fuel and switch, and the air flow sensor is connected to one of the inputs of the air flow regulator, the output of which is connected to the executive mechanism of the regulator, the sensor The melt temperature is connected to one of the inputs of the melt temperature regulator, characterized in that, in order to increase the control accuracy and reliability in operation, it is equipped with a charge column height adjuster, a charge column height adjuster, a second totalizer, two normalizing converters, a sensor and a flue gas temperature controller, the air flow sensor is connected to the input of the first normalizing converter, the output of which is connected to one input of the first summing device, the output of which is connected to one input of the second, the summing device, the pressure sensor is connected to the input of the second normalizing converter, one output of which is connected to another input of the first summing device, the other output of the second the normalizing converter is connected to another input of the second summing device, the output of which is connected to one input of the height regulator of the charge column, the output of which is connected to one input of the switch, one output of which is connected to the input of the dosing unit and loading of the charge and fuel, the exhaust gas temperature sensor is connected with the input of the flue gas temperature controller, one outlet of which is connected to the input of the height sensor of the charge column, the outlet of which is connected to another input of the height regulator of the charge column, the other output of the exhaust gas temperature controller is connected to another input of the switch, the other output of which is connected the melt temperature controller is connected to the third input of the switch.