JPH05339578A - Unit for controlling opening and shutting of overhead cover of coke oven riser - Google Patents

Abstract

PURPOSE:To prevent the generation of sound of detonation by suppressing the explosive combustion of a coke oven gas upon ignition. CONSTITUTION:The title unit is used for opening or shutting the overhead cover 5 of a coke oven riser by the actuation of a cylinder 9. The cylinder 9 is provided with devices 11, 12 and 13 for detecting the degree of opening of the cover 5, and an igniter 14 and a device 15 for confirming ignition are provided near the overhead of the riser 1. A device 16 is provided to control opening and shutting whereby the opening action of the cylinder 9 is interrupted according to the detected signal of a degree of opening of the cover of 10-20 degrees sent from the detector 12 when the overhead cover 5 is open during cutoff, an ignition action initiation command is outputted to the igniter 14, an ignition action stopping command is outputted to the igniter 14 according to an ignition confirmation signal from a device 15 for ignition confirmation of the coke oven gas and a command of restarting the opening action of the cylinder 9 to fully open the cover 5. Thus, the sound of detonation can be prevented to prevent noise pollution nearby and the vibrations of the oven body causing its damage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for opening and closing a coke oven riser canopy capable of preventing an explosion noise at the time of an edging operation in which a dish valve of the coke oven riser tube is closed to open the canopy.

[0002]

2. Description of the Related Art Coke oven gas generated during coal carbonization in a coke oven is collected from a gas passage in the upper part of a carbonization chamber through an ascending pipe to an air collecting main pipe, sucked by a suction blower and introduced into a gas purification process. Is being processed. A canopy for opening to the atmosphere is provided on the top of the rising pipe, and a seal called a disc valve for connecting or blocking the gas recovery passage is provided under the bend pipe connecting the rising pipe and the main air collecting pipe. A valve is provided.

During the process from the charging of coal to the coke oven carbonization chamber to the extrusion of coke, the opening and closing operations of the canopy and the pan valve are performed 3 to 5 times in one step. That is, since the coke oven gas generated in the carbonization chamber during carbonization is full, the air collecting main pipe is filled with coke extrusion gas or air burnout in which air enters the carbonization chamber. An edge cutting operation is required to cut off between the main air collection and the main air collection.
By closing the tray valve of the ascending pipe of the carbonization chamber and then opening the canopy, the carbonization chamber and the air collecting main pipe are shut off from each other, so that air can be prevented from entering the air collecting main pipe.

When the carbonization chamber and the air collecting main pipe are communicated again from the edge cut state, the canopy of the ascending pipe is closed and then the disc valve is opened. Conventionally, the edge cutting edge joining operation of the rising pipe has manually operated each manual lever, but since it is a high heat heavy muscle work, various improvements by mechanization and automation have been attempted. For example, in the method of operating the ascending pipe in which the canopy and the dish valve of the coke oven rising pipe are opened and closed by the operation of the air cylinders installed in each, the dish valve is closed by operating one of the two start valves. Then, the canopy is opened, and the other start valve is operated to close the canopy and subsequently the disc valve is opened (JP-A-63-24).
No. 5487) has been proposed.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The method disclosed in Japanese Patent No. 5487 is excellent in the operability of opening and closing the canopy and the pan valve, but when the tray valve is closed and the canopy is opened after the completion of carbonization, pollution is generated if the coke oven gas is directly released into the atmosphere. To do. For this reason, when the canopy is opened, the coke oven gas is ignited and burned by the ignition device provided at the top of the ascending pipe, but the canopy opening operation is performed at a constant speed, so it suddenly enters the ascending pipe top. There is a drawback that not only the noise caused by the sudden combustion of the coke oven gas by air is generated, but also noise pollution to the surrounding suburbs is caused, and the furnace body is damaged by the vibration accompanied by the explosion noise.

An object of the present invention is to provide an opening / closing control device for a coke oven riser canopy that can suppress explosive combustion when the coke oven gas is ignited when the coke oven riser canopy is opened by a cylinder. is there.

[0007]

Means for Solving the Problems The inventors of the present invention have made extensive studies to achieve the above object. As a result, in the rim cutting operation of the coke oven rising pipe, when the canopy is opened by the cylinder, the opening operation is temporarily interrupted at a predetermined opening, the ignition device is activated to ignite, and the canopy is fully opened. The inventors have reached the present invention by investigating that explosive combustion can be suppressed and explosion noise can be prevented.

That is, the present invention relates to an ascending / descending pipe opening / closing control device for opening / closing a canopy and a dish valve of a coke oven ascending pipe by operating a cylinder installed in each of them. Provided,
An ignition device and an ignition confirmation detector are provided near the top of the ascending pipe to open the canopy from the opening detector when the canopy is opened for edge cutting operation.
The opening operation of the canopy opening / closing cylinder is temporarily interrupted by a detection signal of ~ 20 degrees, an ignition operation start command is output to the ignition device, and the ignition device is ignited by the ignition confirmation signal from the ignition confirmation detector to the coke oven gas. An opening / closing control device is provided which outputs a stop command and commands a restart of the opening operation of the canopy opening / closing cylinder to fully open the canopy.

[0009]

According to the present invention, when the canopy is opened during the edging operation, the opening operation is temporarily interrupted at the canopy opening of 10 to 20 degrees, and the ignition device provided at the top of the ascending pipe ignites the coke oven gas to confirm the ignition. After confirming by the above, since the canopy is fully opened, the coke oven gas is ignited by the igniter at the stage where the canopy opening is 10 to 20 degrees, and the coke oven gas is ignited. Therefore, it is possible to prevent the generation of explosion noise. In addition, after confirming the ignition of the coke oven gas by the ignition confirmation detector, the canopy is fully opened.Therefore, because the ignition device fails to ignite the coke oven gas, the canopy is not fully opened. It can prevent the explosive combustion of.

The opening of the canopy according to the present invention is detected by installing a canopy opening detector, such as a limit switch, in a cylinder for opening and closing the canopy so that the canopy opening is operated at a position of 10 to 20 degrees. do it. The coke oven gas igniter provided at the top of the ascending pipe is not particularly limited as long as it can ignite the coke oven gas, but a high voltage spark plug, a low voltage spark plug, an ignition plug system, an electric heating coil system, etc. Are suitable. An ignition confirmation detector for the coke oven gas may be provided by providing a flame detector at the top of the ascending pipe, and the flame detector may be an ultraviolet type (UV type) using light, an infrared type, a flicker type, or an electric type. The frame rod type that utilizes the physical properties is used. The canopy opening is temporarily interrupted at an opening of 10 to 20 degrees because when the canopy opening is less than 10 degrees, the coke oven gas is not sufficiently ignited by the ignition device due to insufficient opening and the canopy opening is 20 degrees. This is because if the temperature exceeds the limit, air will infiltrate too much and explosive combustion will occur, resulting in insufficient explosion noise prevention effect.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to FIG. FIG. 1 is a schematic layout diagram showing an example of the device of the present invention. In FIG. 1, 1 is an ascending pipe installed in each carbonization chamber of a coke oven 2, 3 is a bend pipe connecting the ascending pipe 1 and a main air collecting pipe 4, and 5 is a canopy provided on the top of the ascending pipe 1. , 6 are dish valves provided in the lower part of the bend pipe. When the edge is cut off, the dish valve 6 is closed to open the canopy 5, and the communication between the air collecting main pipe 4 and the ascending pipe 1 is cut off. 5 is closed and the disc valve 6 is opened so that the air collection main pipe 4 and the rising pipe 1 are connected.

Reference numeral 7 denotes an L-shaped lever for holding the canopy 5, which rotates about a support shaft 8 to open and close the canopy 5. The other end of the L-shaped lever 7 is connected to the rod 10 of the cylinder 9, and when the cylinder 9 is operated to move the rod 10 back and forth, the L-shaped lever 7 rotates about the support shaft 8 and the canopy 5 moves. Open and close. 1
1, 12 and 13 are opening detectors of the canopy 5 provided in the cylinder 9, 11 is the canopy 5 fully closed, 12 is the canopy 5 opening 15 degrees,
13 detects that the canopy 5 is fully opened. Reference numeral 14 is an ignition device including a spark plug provided on the top of the rising pipe 1, and reference numeral 15 is an ignition confirmation detector also including an infrared flame detector.
Reference numeral 16 is an opening / closing control device for controlling opening / closing of the canopy 5, and when an edge cutting is instructed, the disc valve 6 is closed, and then a rod 10 retreat instruction for the cylinder 9 is output to the cylinder control unit 17,
When the opening detector 12 inputs that the canopy 5 has reached an opening of 15 degrees, the cylinder controller 17 outputs a command to suspend the operation of the cylinder 9, and the ignition controller 14 of the ignition device 14 receives an ignition command. Is output, the operation of igniting the coke oven gas by applying a voltage is repeated, and when the ignition confirmation signal of the coke oven gas is input from the ignition confirmation detector 15, the ignition control unit 18 starts the ignition operation of the ignition device 14. A stop command is issued to stop the ignition operation, a rod 10 retraction command for the cylinder 9 is output again to the cylinder control unit 17, the rod 10 of the cylinder 9 is retracted, and a canopy 5 full open signal is input from the opening detector 13. Then, an operation stop command is output to the cylinder controller 17 to stop the cylinder 9.

With the above-mentioned configuration, the opening / closing control device 16 operates the disc valve opening / closing cylinder (not shown) to close the disc valve 6 when the edge cutting command is input, and then the cylinder controller 9 controls the cylinder 9 to operate. The rod 10 retract command is output. The cylinder controller 17 includes an opening / closing controller 16
When a rod 10 retracting command for the cylinder 9 is input from, the cylinder 9 is operated to retract the rod 10 and the opening of the canopy 5 is started. When the opening of the canopy 5 reaches 15 degrees, the opening detector 12 detects it and outputs it to the opening / closing controller 16. The opening / closing control device 16 receives the opening degree of the canopy 5 of 15 degrees from the opening degree detector 12, and the cylinder control unit 17 receives the opening degree.
Then, a command to stop the rod 10 moving backward of the cylinder 9 is output, and an ignition operation start command is output to the ignition control unit 18. The cylinder control unit 17 includes the rod 1 of the cylinder 9.
0 Reverse When the stop command is input once, the operation of the cylinder 9 is temporarily interrupted and the state is maintained.

On the other hand, the ignition control section 18 applies a voltage to the ignition device 14 and repeats the ignition operation. In this case, canopy 5
Since the opening degree is 15 degrees, the coke oven gas is ignited by the igniter at a stage where the air does not enter much, so that the combustion is slow and the explosive combustion is suppressed, and the generation of the explosion noise can be prevented. .. When the coke oven gas at the top of the rising pipe 1 is ignited, the ignition confirmation detector 15 detects it and outputs it to the opening / closing controller 16. When the ignition confirmation detector 15 inputs an ignition confirmation signal to the coke oven gas, the opening / closing controller 16 outputs an ignition operation stop command to the ignition controller 18 to stop the ignition operation, and at the same time, the cylinder controller 17 A rod 10 retraction command for the cylinder 9 is output to retreat the rod 10 of the cylinder 9. The opening / closing control device 16 is
When the full opening of the canopy 5 is input from the opening detector 13,
A stop command for the cylinder 9 is output to the cylinder control unit 17 to stop the operation of the cylinder 9, and the opening operation of the canopy 5 is completed.

Therefore, according to the device of the present invention, the canopy 5
Since the coke oven gas is ignited by operating the igniter at an opening of 10 to 20 degrees, the igniter 14 ignites the coke oven gas at a stage where air does not enter the riser pipe 1, so that the combustion is performed slowly. Therefore, explosive combustion is suppressed, and the generation of explosion noise can be prevented.

[0016]

As described above, according to the method of the present invention, it is possible to suppress the explosive combustion of the coke oven gas when the canopy of the coke oven ascending pipe is opened, and to prevent the generation of explosion noise. In addition, it is possible to prevent vibration due to explosion noise and suppress damage to the furnace body.

[Brief description of drawings]

FIG. 1 is a schematic layout diagram showing an example of the device of the present invention.

[Explanation of symbols]

 1 Climbing furnace 2 Coke oven 3 Bend tube 4 Main air collection pipe 5 Canopy 6 Disc valve 7 Lever 8 Spindle 9 Cylinder 10 Rod 11, 12, 13 Opening detector 14 Ignition device 15 Ignition confirmation detector 16 Opening / closing control device 17 Cylinder controller 18 Ignition controller

Claims (1)

[Claims] 1. A coke oven riser canopy and a dish valve,
In the opening and closing control device of the rising pipe canopy that opens and closes by operating the cylinder installed in each, a canopy opening detector is installed in the canopy opening and closing cylinder, an ignition device and an ignition confirmation detector are installed near the top of the rising pipe, and rim cutting operation When the canopy is opened, the opening operation of the canopy opening / closing cylinder is temporarily interrupted by the canopy opening detection signal from the opening detector, the ignition operation start command is output to the ignition device, and the ignition confirmation detector outputs. An ignition control stop command is output to the ignition device in response to an ignition confirmation signal to the coke oven gas, and an opening / closing control device is provided to open the canopy opening / closing cylinder to restart the canopy. Coke oven riser canopy opening and closing control device.