A control method of a coke oven charging and coke oven head dedusting dual-purpose dust removal device

Abstract

The application discloses a control method of a coke oven charging and coke oven head dedusting dual-purpose dedusting device, and the method comprises the following steps: when charging, a charging vehicle sends a first signal to a control system through a first inductor; when discharging, a coke blocking vehicle sends a second signal to the control system through a second inductor; when the control system receives the first signal, the control system starts a charging dedusting mode; and when the control system receives the second signal, the control system starts a coke oven head dedusting mode. The method realizes two switching modes of charging and discharging in different working conditions, reduces investment cost, reduces land occupation and reduces maintenance cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coking dust removal and environmental protection, in particular to a control method of a coke oven charging and coke oven head dust removal dual-purpose dust removal device. BACKGROUND

[0002] The existing coke oven charging dust removal and coke oven head dust removal device uses two independent control systems, and each system needs to be equipped with corresponding external equipment, including a induced draft fan motor, an induced draft fan high-voltage frequency converter, an upper computer monitoring operation system, a PLC / DCS programming system, and auxiliary components, which has high cost, occupies a large area, and has high maintenance cost.

[0003] In summary, the existing technology has the following problems: the coke oven dust removal occupies a large area, has high maintenance cost, and cannot realize switching between charging and coke operation. SUMMARY

[0004] The present application solves the problem of how to realize switching between charging and coke operation, reduce the occupied area, and reduce the maintenance cost in the coke oven dust removal process.

[0005] To achieve the above purpose, the embodiment of the present application provides a control method of a coke oven charging and coke oven head dust removal dual-purpose dust removal device, which comprises the following steps:

[0006] When the coal is added, the coal charging vehicle sends a first signal to the control system through the first sensor; when the coke is discharged from the coke oven, the coke blocking vehicle sends a second signal to the control system through the second sensor;

[0007] When the control system receives the first signal, the control system starts the charging dust removal mode;

[0008] When the control system receives the second signal, the control system starts the coke oven head dust removal mode.

[0009] Specifically, when the control system receives the first signal, the control system starts the charging dust removal mode, which comprises:

[0010] Adjust the speed of the induced draft fan through the control system, and start the pre-spraying device;

[0011] Open the first electric valve and close the second electric valve through the control system;

[0012] Make the charging flue gas pass through the first electric valve and the bag-type dust collector, and enter the chimney.

[0013] Specifically, when the control system receives the second signal, the control system starts the coke oven head dust removal mode, which comprises:

[0014] adjusting the speed of the induced draft fan by the control system;

[0015] opening the second electric valve by the control system while closing the first electric valve;

[0016] making the coke oven head flue dust pass through the second electric valve and the bag filter, and enter the chimney.

[0017] Specifically, the method further comprises: when the control system neither receives the first signal nor receives the second signal, adjusting the speed of the induced draft fan by the control system to make the dust removal device in the standby dust removal mode.

[0018] Specifically, the speed of the induced draft fan is adjusted by a frequency converter.

[0019] Specifically, in the coal charging dust removal mode, the frequency of the frequency converter is controlled to be 10-30 Hz.

[0020] When the coal car charges coal, the limit sensor triggers a signal to the control system, the control system judges and analyzes to identify the first signal, and through logical operation, the frequency of the induced draft fan frequency converter is 10-30 Hz, thereby driving the induced draft fan to run at medium speed, opening the first electric valve while closing the second electric valve, opening the pre-spraying device, and executing the coal charging dust removal function.

[0021] Specifically, in the coke oven head dust removal mode, the frequency of the frequency converter is controlled to be 30-50 Hz.

[0022] When the coke pushing car extends the coke grid, the limit sensor triggers a signal to the control system, the control system identifies the second signal, and through logical operation, the frequency of the induced draft fan frequency converter is 30-50 Hz, thereby driving the induced draft fan to run at high speed, opening the second electric valve by the control system while closing the first electric valve; suspending the pre-spraying device, and executing the coke oven head dust removal function.

[0023] Specifically, in the standby dust removal mode, the frequency of the frequency converter is controlled to be 0-10 Hz.

[0024] When the control system neither receives the first signal nor receives the second signal, through logical operation, the frequency of the induced draft fan frequency converter is 0-10 Hz, thereby driving the induced draft fan to run at low speed, and executing the standby dust removal function.

[0025] Specifically, the control system is connected with a computer, and when the first sensor or the second sensor cannot send a signal, an operation signal is sent by manually operating the computer.

[0026] Specifically, the dual-purpose dust removal device takes the induced draft fan as a power source.

[0027] The advantages of the present application are: by using the control method of the present application, a set of power source induced fan motor and induced fan high-voltage frequency converter can be realized, the PLC / DCS control system is used to perform logical operation to adjust the speed of the induced fan according to the different working condition requirements of the coal charging and coke smoke dust amount, the electric cut-off valve is controlled to open and close, two switching modes of different working conditions of coal charging and coke are realized, the investment cost is reduced, the land occupation area is reduced, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A flow chart of a control method of a coke oven coal charging and coke oven head dust removal dual-purpose dust removal device is provided for the embodiment of the present application.

[0029] Figure 2 A layout schematic diagram of a coke oven coal charging and coke oven head dust removal dual-purpose dust removal device is provided for the embodiment of the present application.

[0030] DESCRIPTION OF THE DRAWINGS

[0031] 1, coal charging car; 2, first electric valve; 3, computer; 4, bag type dust collector; 5, frequency converter; 6, induced fan; 7, chimney; 8, coke blocking car; 9, second electric valve; 10, control system; 11, pre-spraying device. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0033] The technical solution adopted by the present application is: a switchable control method is built for a dual-purpose dust removal electrical control system for two working environments of coke oven coal charging and coke oven head smoke dust characteristics, the logic operation of the control system is used to control the electric quick cut-off valve and the pre-spraying separation line, and the high-speed switching of the induced fan 6 under different working conditions of coal charging and coke is controlled. Two switching modes of different working conditions of coal charging and coke are realized. The control system 10 is a PLC / DCS control system.

[0034] The present application provides a control method of a coke oven coal charging and coke oven head dust removal dual-purpose dust removal device, as shown in Figure 1 The method comprises the following steps:

[0035] When the coal is added, the coal car 1 sends a first signal to the control system 10 through the first sensor; when the coke oven is discharged, the coke blocking car 8 sends a second signal to the control system 10 through the second sensor; the control system 10 is a PLC / DCS control system. The first sensor and the second sensor can be limit sensors.

[0036] When the control system receives the first signal, the control system starts the coal charging dust removal mode;

[0037] When the control system receives the second signal, the control system starts the coke oven head dust removal mode.

[0038] When the control system receives the first signal, the control system starts the coal charging dust removal mode, which includes:

[0039] Adjust the speed of the induced draft fan 6 through the control system, and start the pre-spraying device 11;

[0040] Open the first electric valve 2 and close the second electric valve 9 through the control system;

[0041] Make the coal charging dust pass through the first electric valve 2 and the bag-type dust collector 4, and enter the chimney 7.

[0042] When the coal is charged, the limit sensor triggers a signal to the PLC / DCS control system to judge, analyze and identify the coke oven charging signal, and after logical operation, the induced draft fan high-voltage frequency converter 5 receives the medium-speed operation instruction, thereby driving the induced draft fan to operate at medium speed, opening the first electric valve and the pre-spraying device 11, and closing the second electric valve 9. Execute the coke oven charging dust removal function.

[0043] When the control system receives the second signal, the control system starts the coke oven head dust removal mode, which includes:

[0044] Adjust the speed of the induced draft fan through the control system, and pause the pre-spraying device 11;

[0045] Open the second electric valve and close the first electric valve through the control system;

[0046] Make the coke oven head dust pass through the second electric valve and the bag-type dust collector 4, and enter the chimney 7.

[0047] When the coke is discharged, the coke blocking car extends the coke grid to trigger a signal to the PLC / DCS control system through the second sensor, the control system identifies the coke discharge signal, and after logical operation, the induced draft fan high-voltage frequency converter receives the high-speed operation instruction, thereby driving the induced draft fan to operate at high speed, opening the second electric valve and closing the first electric valve, and stopping the pre-spraying device, executing the coke oven head dust removal function.

[0048] The method further comprises: when the control system neither receives the first signal nor receives the second signal, adjusting the draft fan rotating speed by the control system to make the dust removal device in the standby dust removal mode. When there is no coking signal and the coke oven charging signal, the PLC / DCS control system performs logical operation to realize that the high-voltage frequency converter of the draft fan receives a low-speed operation instruction, thereby driving the draft fan to operate at low speed and executing the standby dust removal function.

[0049] The frequency converter 5 is used to adjust the speed of the draft fan.

[0050] In the charging dust removal mode, the frequency of the frequency converter 5 is controlled to be 10-30 Hz, thereby driving the draft fan to operate at medium speed. When the charging car is charging, the limit sensor sends a signal to the control system, the control system judges and analyzes the first signal, and through logical operation, the frequency of the frequency converter of the draft fan is controlled to be 10-30 Hz, thereby driving the draft fan to operate at medium speed, opening the first electric valve, closing the second electric valve, opening the pre-spraying device, and executing the charging dust removal function.

[0051] In the coke oven head dust removal mode, the frequency of the frequency converter is controlled to be 30-50 Hz, thereby driving the draft fan to operate at high speed. When the coke pushing car extends the coke grid, the limit sensor sends a signal to the control system, the control system identifies the second signal, and through logical operation, the frequency of the frequency converter of the draft fan is controlled to be 30-50 Hz, thereby driving the draft fan to operate at high speed, opening the second electric valve through the control system, closing the first electric valve, and pausing the pre-spraying device, thereby executing the coke oven head dust removal function.

[0052] In the standby dust removal mode, the frequency of the frequency converter is controlled to be 0-10 Hz, thereby driving the draft fan to operate at low speed. When the control system neither receives the first signal nor receives the second signal, through logical operation, the frequency of the frequency converter of the draft fan is controlled to be 0-10 Hz, thereby driving the draft fan to operate at low speed and executing the standby dust removal function.

[0053] The control system is connected with the computer 3, when the first sensor or the second sensor cannot send a signal, an operation signal is sent by manually operating the computer 3.

[0054] As shown in Figure 2 When the coke pushing car cannot send a coking signal instruction to the PLC / DCS control system, an operation instruction is manually triggered by the upper computer monitoring operation system (computer 3), the PLC / DCS control system performs logical operation to send a high-speed operation instruction to the high-voltage frequency converter of the draft fan, thereby driving the draft fan to operate at high speed, opening the second electric valve, closing the first electric valve, pausing the pre-spraying device, and executing the coke oven head dust removal function.

[0055] When the instruction of the coke charging vehicle cannot send the coke discharging signal to the PLC / DCS control system during the coke charging, the manual trigger operation instruction of the host computer monitoring operation system (computer) can be used to make the PLC / DCS control system send the instruction of medium-speed operation to the high-voltage frequency converter of the induced draft fan through logical operation, drive the induced draft fan to medium-speed operation, open the first electric valve, close the second electric valve, and open the pre-spraying device; and the coke oven charging and dust removal function is executed.

[0056] The dual-purpose dust removal device uses the induced draft fan as a power source. The high-voltage frequency converter connected with the induced draft fan is used to adjust the rotating speed of the induced draft fan and control the suction force, and the flue gas and dust generated during the coke charging and coke discharging of the coke oven are sucked into the bag-type dust collector and combined with the pre-spraying device to indirectly work, and the clean tail gas is discharged to the atmospheric environment through the chimney.

[0057] The control method of the present application can realize the common use of a set of power source induced draft fan motor and induced draft fan high-voltage frequency converter, adjust the rotating speed of the induced draft fan through logical operation of the PLC / DCS control system according to different working condition requirements of the coke charging and coke discharging dust amount, control the opening and closing of the electric quick cut-off valve, realize two switching modes of different working conditions of the coke charging and coke discharging, reduce the investment cost, reduce the occupied area, and reduce the maintenance cost.

[0058] The following examples are only for further illustrating the present application, and do not limit the content of the present application.

[0059] Example 1

[0060] The present embodiment provides a control method of a coke oven charging and coke oven front end dust removal dual-purpose dust removal device, and the specific method is as follows:

[0061] When the PLC / DCS control system does not receive the coke discharging signal of the coke blocking vehicle and the coke charging signal of the coke charging vehicle, the induced draft fan is made to low-speed operation, and the pre-spraying device is temporarily suspended;

[0062] When the PLC / DCS control system receives the coke discharging signal of the coke oven front end dust removal coke blocking vehicle, the induced draft fan is automatically made to high-speed operation and M2 (the second electric valve) is opened, the pre-spraying device is temporarily suspended, and M1 (the first electric valve) is closed; if the coke discharging signal of the coke oven front end dust removal coke blocking vehicle is invalid, the instruction can be manually triggered to make the induced draft fan high-speed operation and M2 electric quick cut-off valve open, the pre-spraying device is temporarily suspended, and M1 electric quick cut-off valve is closed;

[0063] When the PLC / DCS control system receives the coke charging signal of the coke charging vehicle, the induced draft fan is automatically made to medium-speed operation and M1 electric quick cut-off valve is opened, the pre-spraying device is opened, and M2 electric quick cut-off valve is closed; if the coke charging signal of the coke charging vehicle is invalid, the instruction can be manually triggered to make the induced draft fan medium-speed operation, M1 electric quick cut-off valve is opened, the pre-spraying device is opened, and M2 electric quick cut-off valve is closed.

[0064] The dual-purpose device for coke charging and coke oven front dedusting takes the induced draft fan as a power source. After the signal of the coke charging car with inductive limit is triggered, the coke charging signal of the coke oven is sent out. Or after the signal of the coke blocking car with inductive limit is triggered, the coke discharging signal of the coke oven is sent out. Through the PLC / DCS programming system operation, under the monitoring and operation of the upper computer monitoring operation system (computer), the speed of the induced draft fan is adjusted and controlled by the high-voltage frequency converter of the induced draft fan to control the suction force, so that the opening and closing of the electric quick cut-off valve M1 and the electric quick cut-off valve M2 are realized. The flue gas and dust generated by the coke charging and coke discharging of the coke oven are sucked into the bag-type dust collector and combined with the pre-spraying device to work indirectly, and the clean tail gas is discharged into the atmosphere through the chimney.

[0065] Embodiment 2

[0066] The embodiment provides a control method of a dual-purpose dust removal device for coke charging and coke oven front dedusting. An electrical control system of the dual-purpose dust removal device for coke charging and coke oven front dedusting is adopted. The system comprises inductive limit, a coke charging car, a coke charging signal sent to the PLC / DCS control system through the limit inductor when the coke charging car charges coke, a coke blocking car, a coke discharging signal sent to the PLC / DCS control system through the limit inductor when the coke blocking car extends the coke grid during coke charging and coke discharging of the coke oven, an electric cut-off valve (an electric quick cut-off valve M1 and an electric quick cut-off valve M2), an induced draft fan high-voltage frequency converter, an induced draft fan motor, a pre-spraying device, an upper computer monitoring operation system, a PLC / DCS programming system and a matched auxiliary part.

[0067] The external electric cut-off valve, the high-voltage frequency converter and the pre-spraying device are controlled by the PLC / DCS control system to realize the switching mode of the two different dust removal air volumes required under two different working conditions of coke charging and coke oven front dedusting. The control logic comprises a first program segment, a second program segment and a third program segment. The first program segment is the control logic under the condition of no coke charging or coke oven front dedusting. The second program segment is the control logic for only coke oven front dedusting. The third program segment is the control logic for only coke charging dedusting. The first program segment comprises a coke discharging signal sent by the coke blocking car through the inductive limit, a coke charging signal sent by the coke charging car through the inductive limit, a low-speed operation instruction of the induced draft fan high-voltage frequency converter and a stop instruction of the pre-spraying device. The second program segment comprises a coke discharging signal sent by the coke blocking car through the inductive limit, a high-speed manual instruction of the upper computer operation, a high-speed operation instruction of the induced draft fan, an open instruction of the M2 electric quick cut-off valve, an open instruction of the M1 electric quick cut-off valve and a stop instruction of the pre-spraying device. The third program segment comprises a coke charging signal sent by the coke charging car through the inductive limit, a medium-speed manual instruction of the upper computer operation, a medium-speed operation instruction of the induced draft fan, a close instruction of the M2 electric quick cut-off valve, an open instruction of the M1 electric quick cut-off valve and an open instruction of the pre-spraying device.

[0068] The coke oven charging and coke oven head dedusting dual-purpose dust removal system, the fan speed is determined according to the single oven capacity of the coke oven through the engineering smoke dust gas calculation, and the high speed of the fan is determined according to the smoke dust amount treatment of the charging and discharging. When there is no coke car blocking signal and charging car adding coal signal, the induced draft fan runs at low speed, and the pre-spraying device stops.

[0069] When there is coke oven head dedusting, the coke car extends the coke grid, triggers the signal to the PLC / DCS control system through the limit sensor, identifies the coke discharging signal, and realizes the high speed operation of the induced draft fan through logical operation, and drives the induced draft fan to run at high speed, opens the M2 electric quick cut-off valve, and stops the pre-spraying device. The M1 electric quick cut-off valve is closed, and the coke oven head dedusting function is executed.

[0070] When there is coke oven charging dedusting, the charging car adds coal, triggers the signal to the PLC / DCS control system through the limit sensor, judges and analyzes the coke oven charging signal, realizes the medium speed operation of the induced draft fan through logical operation, and drives the induced draft fan to run at medium speed. The M1 electric quick cut-off valve is opened, the pre-spraying device is opened, and the M2 electric quick cut-off valve is closed. The coke oven charging dedusting function is executed.

[0071] When there is no coke discharging signal and coke oven charging signal, the PLC / DCS control system is logically operated to realize the low speed operation of the induced draft fan high voltage frequency converter, and drives the induced draft fan to run at low speed. The dedusting function is executed.

[0072] When there is a limit sensor failure, the coke oven head dedusting function or the coke oven charging dedusting function can be executed manually through the host computer monitoring operating system (computer). When the coke car cannot send the coke discharging signal instruction to the PLC / DCS control system, the PLC / DCS control system can be triggered manually through the host computer monitoring operating system (computer) to send the high speed operation instruction to the induced draft fan high voltage frequency converter through logical operation, and drive the induced draft fan to run at high speed. The M2 electric quick cut-off valve is opened, the pre-spraying device is stopped, the M1 electric quick cut-off valve is closed, and the coke oven head dedusting function is executed.

[0073] When the charging car cannot send the coke discharging signal instruction to the PLC / DCS control system, the PLC / DCS control system can be triggered manually through the host computer monitoring operating system to send the medium speed operation instruction to the induced draft fan high voltage frequency converter through logical operation, and drive the induced draft fan to run at medium speed. The M1 electric quick cut-off valve is opened, the pre-spraying device is opened, and the M2 electric quick cut-off valve is closed. The coke oven charging dedusting function is executed.

[0074] The control method can realize that a set of power source induced fan motor and induced fan high-voltage frequency converter are shared, the PLC / DCS control system is used to adjust the rotation speed of the induced fan according to different working condition requirements of the coal charging and coke discharging smoke dust amount, the electric cut-off valve is controlled to open and close, two switching modes of the coal charging and coke discharging different working condition operation environment are realized, the investment cost is reduced, the land occupation area is reduced, and the maintenance cost is reduced.

[0075] The above merely illustrates the specific embodiments of the present application, and is not used to limit the scope of the present application. The components of the present application can be combined with each other without conflict, and any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present application shall fall within the protection scope of the present application.

Claims

1. A control method of a coke oven charging and coke oven pusher head dedusting dual-purpose dedusting device, characterized in that, The method comprises the following steps: When the coal is added, the coal car passes the first sensor to send the first signal to the control system; when the coke is discharged, the coke blocking car passes the second sensor to send the second signal to the control system; When the control system receives the first signal, the control system starts the coal charging dust removal mode; When the control system receives the second signal, the control system starts the coke oven head dust removal mode; The frequency converter is used to adjust the speed of the induced draft fan; In the coal charging dust removal mode, the frequency of the frequency converter is controlled to be 10-30 Hz; When the coal car charges the coal, the limit sensor triggers the signal to be sent to the control system, the control system judges and analyzes the first signal, and the frequency of the frequency converter of the induced draft fan is controlled to be 10-30 Hz through logical operation, so that the induced draft fan is driven to operate at medium speed, the first electric valve is opened, the second electric valve is closed, the pre-spraying device is opened, and the coal charging dust removal function is performed; In the coke oven head dust removal mode, the frequency of the frequency converter is controlled to be 30-50 Hz; When the coke blocking car extends the coke grid, the limit sensor triggers the signal to be sent to the control system, the control system identifies the second signal, and the frequency of the frequency converter of the induced draft fan is controlled to be 30-50 Hz through logical operation, so that the induced draft fan is driven to operate at high speed, the second electric valve is opened through the control system, and the first electric valve is closed; the pre-spraying device is paused, and the coke oven head dust removal function is performed.

2. The control method of the dual-purpose dust removal device for coke oven charging and coke oven head dedusting according to claim 1, characterized in that, When the control system receives the first signal, the control system starts the coal charging dust removal mode, which comprises: The speed of the induced draft fan is adjusted through the control system, and the pre-spraying device is started; The first electric valve is opened through the control system, and the second electric valve is closed; The coal charging dust passes through the first electric valve and the bag type dust collector, and enters the chimney.

3. The control method of the dual-purpose dust removal device for coke oven charging and coke oven front dedusting according to claim 1, characterized in that, When the control system receives the second signal, the control system starts the coke oven head dust removal mode, which comprises: The speed of the induced draft fan is adjusted through the control system, and the pre-spraying device is paused; The second electric valve is opened through the control system, and the first electric valve is closed; The coke oven head dust passes through the second electric valve and the bag type dust collector, and enters the chimney.

4. The control method of the dual-purpose dust removal device for coke oven charging and coke oven front dedusting according to claim 1, characterized in that, When the control system neither receives the first signal nor receives the second signal, the speed of the induced draft fan is adjusted through the control system to make the dust removal device in the standby dust removal mode.

5. The control method of the dual-purpose dust removal device for coke oven charging and coke oven front dedusting according to claim 4, characterized in that, In the standby dust removal mode, the frequency of the frequency converter is controlled to be 0-10 Hz; When the control system neither receives the first signal nor receives the second signal, the frequency of the frequency converter of the induced draft fan is controlled to be 0-10 Hz through logical operation, so that the induced draft fan is driven to operate at low speed, and the standby dust removal function is performed.

6. The control method of the dual-purpose dust removal device for coke oven charging and coke oven front dedusting according to claim 1, characterized in that, The control system is connected with the computer, and when the first sensor or the second sensor cannot send the signal, the computer is manually operated to send the operation signal.

7. The control method of the dual-purpose dust removal device for coke charging and coke discharge oven front dust removal according to claim 2, characterized in that, The dual-purpose dust removal device takes the induced draft fan as a power source.

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