SU1509343A1 - System for automatic control of cooling clinker in the grate cooler - Google Patents

Abstract

The invention relates to the production of building materials, where rotary kilns are used, equipped with grate coolers. It can be used in the cement industry. Allows you to improve the quality of management. It contains a sensor 5, a regulator 6, a unit for air dilution 7 in a hot chamber, an actuator 8 for a separation gate 9, a sensor 10, a regulator 11, a regulator 12 for a dilution in a cold chamber, an regulating body 13 for excess air flow, a sensor 14 for clinker layer thickness in the hot chamber, sensor 15 of the grate temperature in the hot chamber, protection block 16, controller 17, unit 18 for the thickness of the clinker layer in the hot chamber, actuator 19 for the electric grate in the hot chamber, sensor 20, controller 23 layer thickness clinker in the cold chamber, clinker temperature sensor 21 at the hot chamber outlet, correction unit 22, actuator 24 of the cold chamber grate electric drive, sensor 25, regulator 26, air flow regulator 27 under the hot chamber, air temperature sensor 28 inlet of the refrigerator, unit 29 for determining the extreme value of air temperature, clinker temperature sensor 30 at the cooler outlet, sensor 31, air flow controller 32 for the grate of the cold chamber, regulator 36 Put air into the cold chamber. 1 il.

Description

31509

The invention relates to the production of building materials where rotary kilns are used, equipped with grate coolers, and can be used in the cement industry.

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

The drawing shows a block diagram of the system.

The system contains a grate cooler 1, a rotary kiln 2, a duct k for a cold chamber, an air dilution sensor 5 in the hot chamber of the refrigerator, a regulator 6 with an air dilution unit 7 in the hot chamber, an actuator 8 of the separation gate 9, a dilution sensor 10 a cold chamber, a regulator 11 with a setting unit 12 for dilution in a cold chamber, a regulator 13 for the excess air flow, a sensor k for the thickness of the clinker layer in a hot chamber, a sensor 15 for the temperature of the grate in a hot chamber, a block for protection overheating of the hot cell from the hot chamber, regulator 17 with the setting device l8 of the thickness of the clinker layer in the hot chamber, actuator 19 for electrically driving the grate of the hot chamber, sensor 20 for the thickness of the clinker layer in the cold chamber, sensor 21 for the clinker temperature hot chamber outlet, corrective clinker temperature unit 22 at the hot chamber outlet, regulator 23 of the thickness of the clinker layer in the cold chamber, actuator 2k of the cold chamber grate electric drive of the cold air flow sensor 25 forging lattice of the hot chamber, air flow regulator 2b under the hot chamber, regulator 27 of the air consumption under the hot chamber, sensor .28 of the air temperature at the inlet of the hot chamber entering the furnace, unit 29 for determining the extreme temperature value air, clinker temperature sensor 30 at the fridge outlet, air flow sensor 31 under the cold chamber grate, air flow controller 32 at the grate of the cold chamber with setting device 33, clinker temperature regulator 3 at the fridge outlet, corrector yuschim regulator 35,

the regulator 36 air flow in the cold chamber.

The system works as follows

The grate cooler 1 is heat exchanged between the clinker coming from the rotary kiln 2 with a temperature higher and its cooling air, while the heated air partially enters the kiln in the quantity necessary for burning the fuel.

The main external actions that destabilize the operation of the refrigerator are the change in the required amount of air for fuel combustion, the change in clinker temperature and the change in hydraulic resistance of the clinker layer.

Under the influence of the signal from the air dilution sensor 5, the regulator 6 through the actuator 8 changes the position of the separation gate 9, thereby driving the vacuum in the hot chamber to the value determined by the setting device 7.

As a result, the vacuum in the cold chamber is changed, which is brought to the predetermined controller 11 on the basis of the mismatch of the signals from the vacuum sensor 10 in the cold chamber and the generator 12 by acting on the regulator 13 of the excess air flow. In this way, the values of the vacuum in the hot and cold chambers are adjusted to the target.

To remove disturbances caused by a change in the hydraulic resistance of the clinker, it is possible to control the thickness of the clinker layers in the hot and cold chambers, respectively.

Based on the amount of mismatch between the signals from the sensor 1 of the thickness of the clinker layer to the hot chamber and the setting unit 18, the controller 17 through the actuator 19 of the electric grate of the hot chamber drives the thickness of the layer of clinker to the value determined by the setting unit 18 signal.

Setting the thickness of the clinker layer in the cold chamber is formed based on the signals from the clinker temperature sensor 21 at the exit of the hot chamber, by the corrective unit 22 (lowering the temperature of the clinker determines the increase in the thickness setting of the cold chamber). The regulator 23 of the thickness of the clinker layer in the cold chamber, based on the magnitude of the mismatch of signals from the sensor 20 of the thickness of the clinker layer in the cold chamber and the correction unit 22, acts on the actuator 2 of the electric drive of the cold chamber grid of the cold chamber to given

Blocks 29 and 26 are designed to find and maintain the extreme (maximum) value of the air entering the furnace. For this purpose, the block 29 for determining the extreme value of air temperature is used as an automatic setting device of the air flow controller 26 under the grate of the hot JQ chamber. coming into the oven from the refrigerator 1, based on the signals

cations (clinker temperature, amount of clinker, etc.).

To maintain the set temperature of the clinker at the outlet of the refrigerator, the regulator 32 is designed.

The clinker temperature controller 3 at the outlet of the refrigerator 1, on the basis of the mismatch value of the sensor cell 30 and setpoint 33, generates a control action of the controller 35, which compares these tasks with the signal of the air flow sensor 31 under the cold chamber, acts 15 on the regulator 36 expense

air under the cold chamber, thereby driving the temperature of the clinker at the progress of the refrigerator 1 to the desired one.

In order to prevent overheating of the grate grids of the hot chamber, protection block 1b is designed, which, based on signals from the sensor 15 of the temperature grate of the hot kiln grate, when it reaches the critical sensor 28 of the air temperature, the direct temperature that directly flows into the furnace from the refrigerator 1. D - affects the actuating mechanism of the air flow 26 under the wheels 19 and 27, including the maximum

Q

cations (clinker temperature, amount of clinker, etc.).

To maintain the set temperature of the clinker at the outlet of the refrigerator, the regulator 32 is designed.

The clinker temperature controller 3 at the outlet of the refrigerator 1, on the basis of the mismatch value of the sensor cell 30 and unit 33, generates a driver effect to the controller 35, which compares this task with the signal of the air flow sensor 31 under the cold chamber, acts 5 on the flow regulator 36

air under the cold chamber, thereby driving the temperature of the clinker at the outlet of the refrigerator 1 to the specified one.

To prevent the grate grids of the hot chamber from overheating, a protection block 1b is designed, which, based on the signals from the sensor 15 of the grate temperature of the hot chamber, when it reaches a critical temperature, directly affects the actuators 19 and 27, including the maximum

On the basis of the mismatch value of the sensor cell 25 and the unit 29 through the air flow regulating body 27, the air grid under the grate of the hot chamber is changed.

As a result of the interaction of the regulators 6 and 11, the air flow rate from the cold chamber increases, which causes a decrease in the temperature of the air entering the furnace. The unit 29 increases the task to the air flow controller 26 under the hot chamber, the controller 2b respectively increases the air flow, which causes a decrease in the vacuum in the hot chamber and the controller 6 reduces the air flow from the cold chamber. If an increase in the temperature of the air entering the furnace occurs at this time, block 29 takes the next step in the direction of increasing the air flow and so on until the temperature of the air entering the furnace increases. In the case of a decrease in the temperature of the air entering the furnace, unit 29

returns to the previous value by the corresponding sensor, and the Dani output of the air flow under the grate-regulator of the air dilution in the hot chamber is connected to the actuating mechanism of the separation gate.

The hot lattice of the hot chamber, thus exhausting the possibilities of heat removal in the hot chamber with the resultant siotislaus with what.

the frequency of rotation of the grate drive and the maximum air flow rate under the grate of the hot chamber.

The proposed control system will allow taking into account deviations from the optimal operation mode of the refrigerator with greater accuracy.

Claims (1)

Invention Formula 40 System for automatic control of the clinker cooling process, in the grate cooler, containing air flow regulators in the hot and cold chambers with the corresponding E5 regulators, clinker temperature sensor at the refrigerator outlet, connected to the first inlet of the cold air flow regulator, temperature sensor of the solar grid in the hot chamber, actuators of the electric grids of the grate in the hot and cold chambers, air vacuum regulator in a hot cell is consistent with that. In order to improve the quality of control, it is equipped with a vacuum regulator for air in a cold chamber with appropriate sensor and regulator, regulators with sensors for the thickness of the clinker layer in the hot and cold chambers, air flow sensors for the corresponding chambers, and a temperature sensor for the clinker at the exit of the mountains whose chamber, the air inlet temperature sensor of the hot chamber, the correcting unit, the unit for determining the extreme value of the air temperature and the protection unit, the air flow sensor in the hot the camera is connected to the first input of the corresponding air flow regulator, to the second input of which an inlet air temperature sensor is connected through a serially connected block for determining the extreme temperature value hot chamber, tolI controller output The layer in the hot chamber is connected to the first input of the actuator of the electric grate drive in the hot chamber, the temperature sensor of the grate in the hot chamber is connected through the series-connected protection unit to the second input of the actuator the electric grate drive in the hot chamber and to the corresponding input of the air flow regulator in the hot chamber, the temperature sensor of the clinker at the hot outlet camera through a serially connected correction unit connected to the corresponding input of the thickness controller of the clinker layer in the cold chamber, the output of which is connected to the input of the actuator of the electric grate in the cold chamber, the air flow sensor in the cold chamber is connected to the second input of the corresponding regulator.