Method for preventing coke tank of coke oven from repeatedly receiving coke

Abstract

The invention discloses a method for preventing a coke tank of a coke oven from repeatedly receiving coke, relates to the technical field of coking, and adopts a flame detection / temperature detection mode to judge whether the operated coke tank is in an empty tank state or a full tank state, and performs linkage of coke pushing operation of an operation coke pusher and linkage of coke receiving operation of a coke tank carrier loader according to the state of the coke tank. The detection mode adopts a flame detector or a temperature detection sensor to detect the state of a coke tank in operation below the coke guide car, if the coke tank is in a full tank state, flames above the coke tank are detected by the flame detector, high-temperature coke is detected by the temperature detector, a full tank signal is generated, and the signal is transmitted to a PLC (Programmable Logic Controller) of the coke guide car; according to the method, whether the working coke tank is in a full tank state or an empty tank state is judged by means of detecting flames generated by the coke tank filled with red coke and a high-temperature real state, so that a detection signal is real and effective; and the double linkage of the coke pusher and the coke tank carrier loader more effectively avoids the repeated coke receiving accident.

Description

Technical Field

[0001] The invention relates to the technical field of coking, and in particular to a method for preventing a coke oven coke tank from repeatedly receiving coke. Background Art

[0002] During the coke oven's coke discharge operation, the coke guide car and the coke pusher car guide the coke into the coke drum. After the pusher rods are fully pushed out, the coke cake falls under the action of gravity at the end of the coke guide grid into the coke drum of the coke quenching car. At this point, the coke drum is already full of red coke and needs to be emptied in the dry quenching furnace before it can be recharged. If the coke drum is not completely emptied and coke is repeatedly added, it will cause coke overflow, burn equipment, and cause safety accidents.

[0003] The Chinese invention patent application with application number: CN202111081000.5 discloses a control method for preventing a dry quenching tank from repeatedly receiving coke, comprising: a control system controls the rotation of the coke tank and determines whether the rotation speed of the coke tank is in a high-speed rotation state, and marks "coke tank is at high speed"; the control system continues to determine whether the rotation speed of the coke tank is in a low-speed rotation state, and marks "coke tank is at low speed"; the control system continues to determine whether the rotation speed of the coke tank has stopped rotating and closes the brake, and marks "coke tank is full"; when the elevator lifts the coke tank and detects that the coke tank has been lifted, it is determined to be in an "empty tank" state; the marked "coke tank is full" is reset; when the "coke tank is full" mark is not reset, the coke tank rotation signal is forcibly reset to prohibit receiving coke again.

[0004] However, the underlying control of this patented technical solution relies solely on logical judgment of the control output state combination. This is effective when the process is proceeding normally. However, if manual intervention or abnormal equipment signals occur, logical judgment errors are likely to occur, and a "full tank" may be mistakenly marked as an "empty tank," leading to repeated coke-receiving accidents. Summary of the Invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a method for preventing repeated coke connection in the coke drum of a coke oven, to solve the secondary coke connection accident that may be caused by the inaccurate full / empty status of the coke drum during manual operation or logical judgment, and to ensure production safety.

[0006] Technical solution: A method for preventing repeated coke delivery to a coke oven coke drum, which uses flame detection / temperature detection to determine whether the operating coke drum is in an "empty drum" or "full drum" state. The coke pushing operation of the coke pushing car and the coke drum carrier are interlocked according to the coke drum state. The detection method uses a flame detector or a temperature detection sensor to detect the state of the operating coke drum below the coke guide car. If the drum is full, the flame above the drum is detected by the flame detector, and the temperature detector detects high-temperature coke, generating a "full drum" signal and transmitting the signal to the coke guide car PLC. The method specifically includes the following steps:

[0007] S1, the detector is installed on the focus guide car, the flame detector detection port is installed on the dust collection cover, the No. 1 flame detector is installed on the right dust collection cover, and the No. 2 flame detector is installed on the left dust collection cover. The detection position below the focus guide grid is at an angle of 30°-60° with the horizontal direction;

[0008] S2. When the working coke tank reaches the working area, the flame detection position is the lower half of the working area;

[0009] S3: When the coke tank enters the bottom of the coke intercepting car and is ready for coke receiving, the coke tank enters the detection area of ​​the No. 1 flame detector and the No. 2 flame detector, and the flame detection signal enters the PLC of the coke intercepting car;

[0010] S4. After receiving the flame detector signal, the PLC of the coke interceptor performs two integrated judgments to determine the status signal of the coke tank under the coke interceptor. If "full tank" is 1, "empty tank" is 0. Then the coke tank status signal is sent to the ground PLC of the four large vehicles.

[0011] S5. After receiving the coke drum status signal, the ground coordination PLC of the four major vehicles sends the coke drum status signal to the coke pushing vehicle and coke drum transport vehicle operating in the same furnace group as the coke intercepting vehicle according to the furnace number of each vehicle;

[0012] S6. The coke pushing car operating in the same furnace group as the coke holding car makes a judgment after receiving the coke tank status signal. If the status is 0, "empty tank", normal coke pushing is allowed. If the status is 1, "full tank", the coke pushing operation is interlocked and the coke pushing signal is forcibly reset, and the coke pushing signal is not allowed to be triggered.

[0013] S7. The coke drum carrier operating in the same furnace group as the coke intercepting car makes a judgment after receiving the coke drum status signal. If it is in the "empty drum" 0 state, normal coke receiving is allowed. If it is in the "full drum" 1 state, the coke receiving operation is interlocked, the coke receiving signal is forcibly reset, and the coke receiving signal is not allowed to be triggered.

[0014] Furthermore, the coke drum status interlocking signal is only interlocked before the coke pushing operation is triggered by the coke pushing vehicle. When the coke pushing operation starts, the coke drum status signal changes and the coke pushing operation is no longer interlocked.

[0015] Furthermore, the coke drum status interlocking signal is only interlocked before the coke drum carrier is triggered to perform the coke receiving operation. When the coke receiving operation starts, the coke drum status signal changes and the coke receiving operation is no longer interlocked.

[0016] Furthermore, the flame detector includes a No. 1 flame detector and a No. 2 flame detector.

[0017] Furthermore, the flame detector has a detection wavelength range of 160 μm-270 μm, and the output signal is a switching signal. When the pilot flame is detected, it is determined to be 'full tank' and the output switching signal is 1.

[0018] Furthermore, the temperature detection sensor has a detection range of 0-1500°C, and the output signal is an analog signal and a switch signal. When the detected temperature is greater than 800°C, it is judged as 'full tank' and the output switch signal is 1.

[0019] Furthermore, after the "full tank" signal enters the PLC of the coke guide car, it is transmitted to the coke pushing car and the trolley in operation through the wireless transmission system;

[0020] When the coke pushing vehicle receives the "full tank" signal, an alarm is generated and the coke pushing operation is chained shut down;

[0021] When the coke tank carrier in operation receives the "full tank" signal, an alarm is generated and a chain shutdown of the coke receiving operation is performed to prevent the coke tank from receiving coke repeatedly.

[0022] Beneficial effects:

[0023] (1) The present invention determines whether the coke drum in operation is in a "full drum" or "empty drum" state by detecting the flame and high temperature of the coke drum filled with red coke, thereby ensuring that the detection signal is true and effective.

[0024] (2) In the present invention, the use of real detection signals eliminates false "empty tank" signals caused by program misjudgment or equipment malfunction, and effectively prevents the coke tank from receiving coke repeatedly.

[0025] (3) In the present invention, the double interlocking of the coke pushing car and the coke tank transport car more effectively avoids repeated coke receiving accidents caused by misoperation of the single car operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a position diagram of the present invention;

[0027] Figure 2 Flowchart of the present invention.

[0028] In the figure: 1. Flame detector No. 1; 2. Flame detector No. 2; 3. Dust hood on the right; 4. Dust hood on the left; 5. Coke tank. DETAILED DESCRIPTION

[0029] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] According to the attached Figure 1-2, provides a method for preventing the coke drum of the coke oven from receiving coke repeatedly, wherein the detection port of the flame detector is installed on the dust collecting hood, the No. 1 flame detector 1 is installed on the right dust collecting hood 3, and the No. 2 flame detector 2 is installed on the left dust collecting hood 4. The position below the coke guide grid is detected, and the detection direction forms an angle of 30°-60° with the horizontal. When the working coke drum reaches the working area, the flame detection position is the lower half of the working area.

[0032] When the working coke tank enters under the coke intercepting car and prepares for the coke receiving operation, the coke tank 5 enters the detection area of ​​the No. 1 flame detector 1 and the No. 2 flame detector 2, and the flame detection signal enters the coke intercepting car PLC.

[0033] In this embodiment, after receiving the flame detector signal, the PLC of the coke interceptor performs two integrated judgments to determine the status of the coke tank operating below the coke interceptor: "full tank" is 1, and "empty tank" is 0. The coke tank status signal is then sent to the ground PLC of the four large vehicles.

[0034] In this embodiment, after the ground coordination PLC of the four major vehicles receives the coke drum status signal, it sends the coke drum status signal to the coke pushing vehicle and coke drum transport vehicle operating in the same furnace group as the coke intercepting vehicle according to the furnace number of each vehicle.

[0035] In this embodiment, the coke pushing car operating in the same furnace group as the coke intercepting car makes a judgment after receiving the coke tank status signal. If it is in the 'empty tank' 0 state, normal coke pushing is allowed. If it is in the 'full tank' 1 state, the coke pushing operation is interlocked, the coke pushing signal is forcibly reset, and the coke pushing signal is not allowed to be triggered.

[0036] In this embodiment, the coke drum carrier operating in the same furnace group as the coke intercepting car makes a judgment after receiving the coke drum status signal. If it is in the 'empty drum' 0 state, normal coke receiving is allowed. If it is in the 'full drum' 1 state, the coke receiving operation is interlocked, the coke receiving signal is forcibly reset, and the coke receiving signal is not allowed to be triggered.

[0037] The above-mentioned signals and interlocking are only valid before the coke pushing operation or coke receiving operation begins. Changes in the coke tank status signal during the coke pushing process will not affect the normal coke pushing and coke receiving operations.

[0038] In this embodiment, the coke drum status interlocking signal is only interlocked before the coke pushing vehicle is triggered to perform the coke pushing operation. After the coke pushing operation starts, the coke drum status signal changes and the coke pushing operation is no longer interlocked.

[0039] In this embodiment, the coke drum status interlocking signal is only interlocked before the coke drum carrier is triggered to perform the coke receiving operation. When the coke receiving operation starts, the coke drum status signal changes and the coke receiving operation is no longer interlocked.

[0040] Example 2

[0041] The No. 1 and No. 2 coke ovens in the coking unit of Zhanjiang Iron and Steel Plant were put into operation in July 2015 and February 2016 respectively. They are 4×65-hole JNX3-70-2 reheating type single-collector three-suction pipe top-mounted multi-stage heating coke ovens, arranged on the same center line and equipped with three sets of coke oven locomotives for coke pushing operations.

[0042] The 1# coke pusher, 1# coke interceptor, and 2# coke hopper were performing a linked coke pushing operation at furnace group 1. Ground coordination established data communication between the three vehicles.

[0043] When the 2# coke tank carrier with the full coke tank arrives under the 1# coke blocking car and prepares to receive the coke, the coke tank 5 enters the detection range of the flame detector.

[0044] Flame detector No. 1 and flame detector No. 2 detect the flame state and send the signal to the PLC system of No. 1 coke intercepting car. The flame detector model used is Honeywell C7027A-1049.

[0045] The 1# coke intercepting car PLC receives the signals from two detectors, determines that the coke tank status is a "full tank" signal, that is, the coke tank status signal is 1, and transmits it to the ground coordination PLC.

[0046] After receiving the signal, the ground coordination PLC judges the position of the operating vehicle of the No. 1 operating furnace group and sends the coke tank status 1 to the No. 1 coke pushing car and the No. 2 coke tank transport car.

[0047] The 1# coke pushing car receives the tank status signal of 1, determines that the coke tank in the collaborative operation is in the "full tank" state, pops up an alarm and interlocks the coke pushing operation, making it impossible to push coke.

[0048] The 2# coke tank transport vehicle receives the tank status signal of 1, determines that the coke tank in operation is in the "full tank" state, pops up an alarm, and performs the interlocking of the coke receiving operation, prohibiting the rotation of the coke tank.

[0049] Furthermore, the coke drum for the operation was not rotated and ready, and the four-car coordination system interlocked coke pushing car did not allow the coke pushing operation to be carried out.

[0050] The PLCs mentioned above are all Siemens S7-400 series.

[0051] This embodiment detects whether the operating coke drum status is "empty" or "full" through effective detection means, and effectively sends signals to the 1# coke pushing car and 2# coke drum carrier car that work together for safety interlocking. Double interlocking is performed using the coke drum status interlocking and the coke drum rotation interlocking points, effectively preventing accidents of repeated coke receiving, and only interlocking the current furnace group operating vehicles without affecting other furnace group operating vehicles, thereby greatly improving the safety of the coke pushing operation.

[0052] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for preventing repeated coke receiving in a coke oven coke tank, characterized in that: The flame detection / temperature detection method is used to determine whether the operating coke drum is in the "empty drum" or "full drum" state. According to the coke drum state, the coke pushing operation of the coke pushing car and the coke drum carrier are interlocked to the coke receiving operation. The detection method uses a flame detector or a temperature detection sensor to detect the state of the operating coke drum under the coke guide car. If the drum is full, the flame above the coke drum is detected by the flame detector, and the temperature detector detects the high temperature of coke, generating a "full drum" signal and transmitting the signal to the coke guide car PLC. The specific steps include: S1, the detector is installed on the focus guide car, the flame detector detection port is installed on the dust collection cover, the No. 1 flame detector (1) is installed on the right dust collection cover (3), and the No. 2 flame detector (2) is installed on the left dust collection cover (4), detecting the position below the focus guide grid, and the detection direction forms an angle of 30°-60° with the horizontal; S2. When the working coke tank reaches the working area, the flame detection position is the lower half of the working area; S3, when the coke tank enters the bottom of the coke intercepting car and is ready for the coke receiving operation, the coke tank (5) enters the detection area of ​​the No. 1 flame detector (1) and the No. 2 flame detector (2), and the flame detection signal enters the PLC of the coke intercepting car; S4. After receiving the flame detector signal, the PLC of the coke interceptor performs two integrated judgments to determine the status signal of the coke tank under the coke interceptor. If "full tank" is 1, "empty tank" is 0. Then the coke tank status signal is sent to the ground PLC of the four large vehicles. S5. After receiving the coke drum status signal, the ground coordination PLC of the four major vehicles sends the coke drum status signal to the coke pushing vehicle and coke drum transport vehicle operating in the same furnace group as the coke intercepting vehicle according to the furnace number of each vehicle; S6. The coke pushing car operating in the same furnace group as the coke holding car makes a judgment after receiving the coke tank status signal. If the status is 0, "empty tank", normal coke pushing is allowed. If the status is 1, "full tank", the coke pushing operation is interlocked and the coke pushing signal is forcibly reset, and the coke pushing signal is not allowed to be triggered. S7. The coke drum carrier operating in the same furnace group as the coke intercepting car makes a judgment after receiving the coke drum status signal. If it is in the "empty drum" 0 state, normal coke receiving is allowed. If it is in the "full drum" 1 state, the coke receiving operation is interlocked, the coke receiving signal is forcibly reset, and the coke receiving signal is not allowed to be triggered.

2. A method for preventing repeated coke receiving in a coke oven coke tank according to claim 1, characterized in that: The coke drum status interlocking signal is only interlocked before the coke pushing operation is triggered by the coke pushing vehicle. When the coke pushing operation starts, the coke drum status signal changes and the coke pushing operation is no longer interlocked.

3. The method for preventing repeated coke receiving in a coke oven coke tank according to claim 1, characterized in that: The coke tank status interlocking signal is only interlocked before the coke tank carrier is triggered to perform the coke receiving operation. When the coke receiving operation starts, the coke tank status signal changes and the coke receiving operation is no longer interlocked.

4. The method for preventing repeated coke receiving in a coke oven coke tank according to claim 1, characterized in that: The flame detector comprises a No. 1 flame detector (1) and a No. 2 flame detector (2).

5. The method for preventing repeated coke receiving in a coke oven coke tank according to claim 1, characterized in that: The flame detector has a detection wavelength range of 160 μm-270 μm, and the output signal is a switching signal. When the pilot flame is detected, it is judged as "full tank" and the output switching signal is 1.

6. The method for preventing repeated coke receiving in a coke oven coke tank according to claim 1, characterized in that: The temperature detection sensor has a detection range of 0-1500°C, and the output signal is an analog signal and a switch signal. When the detected temperature is greater than 800°C, it is judged as "full tank" and the output switch signal is 1.

7. The method for preventing repeated coke receiving in a coke oven coke tank according to claim 1, characterized in that: After the "full tank" signal enters the coke guiding car PLC, it is transmitted to the coke pushing car and trolley in operation through the wireless transmission system; When the coke pushing vehicle receives the "full tank" signal, an alarm is generated and the coke pushing operation is chained shut down; When the coke tank carrier in operation receives the "full tank" signal, an alarm is generated and a chain shutdown of the coke receiving operation is performed to prevent the coke tank from receiving coke repeatedly.

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