A method of monitoring a dry quenching coke drum

Abstract

This invention relates to a method for monitoring coke cans in dry quenching, comprising the following steps: Step 1: Designing a coke can monitoring device, comprising a reflector and a ranging device. The reflector is installed on the protruding part of the rotating coke can, and the ranging device is installed on the ground, transmitting the measured distance signals to the hoist control system; Step 2: The hoist control system logically determines whether there is a coke can on the transport vehicle based on the measured distances L1 and L2; Step 3: If a coke can is present, the hoist control system calculates the angle of deflection of the coke can based on the measured distances; Step 4: The hoist control system performs logical control based on the determined presence or absence of a coke can and the angle of deflection, achieving safety interlock protection. This scheme ensures the production safety of the dry quenching hoist through safety interlock control with the dry quenching hoist control system.

Description

Technical Field

[0001] This invention relates to a monitoring method, specifically a method for monitoring dry quenching coke pots, and belongs to the field of electrical equipment control technology. Background Technology

[0002] In the dry quenching process of coke ovens, the coke cans are moved by coke can transport vehicles on the dry quenching car to complete the tasks of receiving red-hot coke in the coke oven area and transporting coke cans in the dry quenching area. The equipment structure of the coke can transport vehicle under the dry quenching hoist is as follows: Figure 1 As shown, the coke tank trolley has a coke tank rotating platform 1, coke tanks that can rotate with the rotating platform, coke tank lifting equipment and other components. There are two bottom doors 3 at the bottom of the coke tank, with locking grooves 4 on the bottom doors. The lifting equipment has hooks 5 and lifting lugs 6. After the coke tank trolley is positioned under the hoist derrick, the hooks 7 in the hoist derrick start to lift the lifting equipment. The hooks 5 of the lifting equipment will be inserted into the locking grooves 4 to mechanically lock the bottom doors of the coke tank, ensuring that the red coke will not leak during the entire hoisting process.

[0003] Monitoring of coke cans is accomplished by sensors and a control system on the transport vehicle. Switching sensors and rotary encoders installed on the vehicle confirm the presence of coke cans and whether they have rotated to position 2 on the positioning axis, and then perform subsequent interlocking operations with the dry quenching elevator system. Because these sensors operate in vibration and high-temperature areas, their failure rate is relatively high, and many safety accidents are caused by sensor malfunctions. When the on-board sensors detecting the presence of coke cans malfunction, even if there are no coke cans on the transport vehicle, the control system will still receive a false "can present" signal. In this case, the on-board control system will not proceed with the subsequent empty coke can connection process under the elevator derrick, as shown in the diagram. Figure 2 As shown, a transport vehicle without actual coke canisters may cause a red-hot coke burning accident due to receiving coke in the coke oven area. When the onboard sensor detecting the presence of coke canisters malfunctions and fails to transmit a signal, the control system will still receive a false "no canister" signal even if the transport vehicle has coke canisters. In this case, the onboard control system will stop the transport vehicle with actual coke canisters under the hoist derrick to proceed with the subsequent canister receiving process, causing a "double canister" accident. (See diagram below.) Figure 3 As shown in the diagram. When the positioning sensor or encoder installed on the coke can malfunctions, causing the rotating coke can to fail to reach the positioning axis position 2, the control system initiates the lifting process according to the normal interlocking procedure. The hook 5 of the lifting device cannot engage the locking slot 4 for mechanical locking due to the coke can's tilt. After the lifting hook 7 begins lifting, the two bottom doors of the coke can open under its own weight and the pressure of the red-hot coke, causing an accident that burns the transport vehicle. The accident diagram is shown in the diagram. Figure 4 As shown.

[0004] Therefore, the reliability of vehicle sensor signals determines the production safety of vehicles. Even with the addition of redundant detection and other functions, the following problems will still be encountered in actual use:

[0005] 1. The vehicle-mounted control system relies on the on-board switch limit switch to detect whether the coke can is on the trolley and to perform interlock protection. However, if the switch limit switch is damaged, it can easily lead to a safety accident.

[0006] 2. The vehicle-mounted control system relies on switch limit switches or rotary encoders to confirm whether the coke tank has rotated to the correct position. However, these devices are close to the high-temperature coke tank and have a high failure rate. Abnormal signal detection can easily lead to safety accidents.

[0007] 3. The large mechanical clearance between the coke tank and the transport vehicle often leads to the problem of the limit signal not being detected.

[0008] Sensors installed in high-temperature and vibration areas have a high failure rate and require a lot of maintenance. Summary of the Invention

[0009] This invention addresses the problems existing in the prior art by providing a method for monitoring coke canisters in dry quenching. This solution eliminates safety accidents caused by malfunctions in the vehicle-mounted coke canister detection system. The solution includes a ground-based monitoring device for detecting the presence and position of coke canisters on the dry quenching transport vehicle, and provides a calculation method to calculate the rotational deflection of the coke canister. Through safety interlock control with the dry quenching elevator control system, the production safety of the dry quenching elevator is ensured.

[0010] To achieve the above objectives, the technical solution of the present invention is as follows: a method for monitoring dry quenching coke pots, the method comprising the following steps:

[0011] Step 1: Design a coke tank monitoring device, which includes a reflector and a distance measuring device. The reflector is installed on the protruding part of the rotating coke tank, and the distance measuring device is installed on the ground. The two measured distance signals are transmitted to the hoist control system.

[0012] Step 2: The hoist control system uses the two measured distances to logically determine whether there are coke cans on the transport vehicle;

[0013] Step 3: In the presence of a coke can, the hoist control system calculates the angle of the coke can's tilt based on the two measured distances;

[0014] Step 4: The hoist control system performs logic control based on the determination of the presence or absence of the coke can and the angle of the coke can tilt, so as to realize safety interlock protection.

[0015] The coke pot monitoring device includes a set of reflectors and ranging devices. The reflectors are two wedge-shaped bodies with an isosceles right triangle horizontal cross-section. The length of the right-angled side is a, and a is the arc length measured at the maximum allowable safe offset angle of the coke pot. One acute vertex of the isosceles right triangle is tangent to the horizontal cross-section circle of the coke pot. The reflectors are installed symmetrically at the most prominent position on the side of the coke pot, ensuring that the inclined plane of the wedge-shaped body is the most protruding surface on the outer shell of the coke pot. The reflectors can rotate and move together with the coke pot. The ranging device includes two laser rangefinders installed on the ground. The horizontal distance S1 of the ranging light emitted by the laser rangefinder is greater than the length of the right-angled side a, ensuring that the ranging light will not be concentrated on the same reflector. The maximum ranging distance from the rangefinder to the surface of the coke pot is S. Each rangefinder will measure the distances L1 and L2 from this device to the inclined plane of the reflector installed on the coke pot respectively, and transmit the ranging signal to the dry quenching coke lifter control system for interlocking. Since the inclined plane of the reflector is the most protruding surface of the coke pot, the distances from each point on its surface to the laser rangefinder will be the shortest compared to the points on the outer surface of the coke pot. That is, when the coke pot rotates and is aligned, the measured values of L1 and L2 by the rangefinder can only be less than or equal to S, which is convenient for distinguishing the inclined plane of the reflector and the outer surface of the coke pot by the difference in length.

[0016] When the coke pot carrier transports the coke pot and is positioned under the lifting tower, the laser rangefinders measure the distances L1 and L2 to the inclined planes of the reflectors respectively. Due to the occlusion of the coke pot and the reflectors, according to Figure 5 the geometric relationship shown, the measured length range by the rangefinder can only be between S - a and S, which can be used as the basis for judging the presence or absence of the coke pot. The hoist control system uses the measured values of the two laser rangefinders as a means of redundant detection for each other. Only when it is confirmed that both L1 and L2 are within the range of S - a and S can it be judged that there is a coke pot on the transport vehicle. If both L1 and L2 are greater than the maximum distance S, it is judged that there is no coke pot on the transport vehicle.

[0017] When the coke pot rotates in place and the coke pot carrier is positioned under the lifting tower, the laser rangefinders measure the distances L1 = L2 to the center points of the reflectors respectively. Even if the coke pot moves in the ranging direction due to mechanical clearance, the measured distances become L1' and L2' respectively, but the coke pot that is rotated and aligned can always ensure that the formula L1' = L2' holds, and each measured value is within the range of S - a and S. The hoist control system uses this as the basis for judging that the coke pot has rotated in place. When the coke pot undergoes Figure 6 the deflection shown, the distances L1 ≠ L2 measured by the laser rangefinders to the reflector plates. If the clockwise deflection occurs, then L1 > L2. If the counterclockwise deflection occurs, then L1 < L2. Through geometric operations, it can be known that there is a proportional correspondence relationship between the deflection angle α of the coke pot and the value of L1 - L2. Under the condition of ensuring that the laser rangefinder can always measure the distance to the inclined plane of the reflector plate, when the maximum allowable deflection angle is α max in the case, the measured L1 at this timemax -L2 min The value will be the largest. Since the allowable deflection angle is small, the allowable deflection arc length is approximately a straight line. Therefore, a trigonometric function relationship exists between the deflection angle α and the L1-L2 value, i.e., b*tanα. max ≈L1 max -L2 min , where b≈(L1 max -L2 min )cotα max Let be the size factor of the coke pot. Furthermore, when α = 0°, L1 - L2 = 0, which still satisfies the condition b*tanα = L1 - L2. Based on this, the real-time deflection angle of the coke pot can be calculated when a certain degree of deflection occurs, but the deflection angle is within the allowable range. Since the allowable deflection arc length 'a' is very small compared to the radius R of the coke pot, it can be approximated as a straight line, thus yielding the formula... but

[0018] Since there is a linear relationship between αmax and (L1max-L2min), the real-time deflection angle of the coke pot can also be calculated.

[0019] Based on the ground detection device's assessment of the presence, status, and tilt angle of coke cans, the hoist control system can implement safety interlocking controls according to the can's condition. If no coke can is detected on the transport vehicle, the hoist control system will prohibit the hoist from lifting, allowing only empty coke cans to be lowered. If a coke can is detected on the transport vehicle, the system will determine if the can's tilt angle is within the allowable range. If it is, the coke can delivery process is permitted, and the actual tilt angle is calculated, recorded, and alarmed by the control system. If the tilt angle exceeds the allowable range, the coke can delivery process is prohibited, and an anomaly is recorded and alarmed by the control system.

[0020] Compared with existing technologies, this invention has the following advantages: 1) This technical solution enables the hoist control system to monitor the presence or absence of the coke tank under the hoist derrick, avoiding safety accidents caused by vehicle-mounted limit switch failures; 2) This solution enables the hoist control system to monitor the tilting state of the coke tank under the hoist derrick and provides two calculation formulas: namely...

[0021] 3) The scheme uses redundant measurements from two laser rangefinders to detect and handle abnormal conditions of the coke tanks on the coke tank transport vehicle in a timely manner through secondary program development; 4) The coke tank detection equipment involved in this scheme is installed on the ground, which extends its service life and improves the reliability of the detection equipment. Attached Figure Description

[0022] Figure 1 Schematic diagram of a coke pot operating under the hoist derrick;

[0023] Figure 2 Diagram illustrating accidents caused by frequent "tank present" signal malfunctions;

[0024] Figure 3 Diagram illustrating an accident caused by a failure to send a "tank present" signal.

[0025] Figure 4 Schematic diagram of a coke tank tilting during lifting accident;

[0026] Figure 5 Schematic diagram of the structure and installation of the coke oven monitoring device;

[0027] Figure 6 Schematic diagram for measuring the deflection angle of the coke pot;

[0028] Figure 7 Safety interlocking logic flowchart.

[0029] 1-Coke tank rotating platform; 2-Coke tank positioning axis; 3-Two bottom doors of the coke tank; 4-Locking groove on the bottom door; 5-Hook; 6-Lifting lug; 7-Hoisting hook. Detailed Implementation

[0030] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0031] Example 1: A method for monitoring dry quenching coke pots, the method comprising the following steps:

[0032] Step 1: Design a coke tank monitoring device, which includes a reflector and a distance measuring device. The reflector is installed on the protruding part of the rotating coke tank, and the distance measuring device is installed on the ground. The two measured distance signals are transmitted to the hoist control system.

[0033] Step 2: The hoist control system uses the two measured distances to logically determine whether there are coke cans on the transport vehicle;

[0034] Step 3: In the presence of a coke can, the hoist control system calculates the angle of the coke can's tilt based on the two measured distances;

[0035] Step 4: The hoist control system performs logic control based on the determination of the presence or absence of the coke can and the angle of the coke can tilt, so as to realize safety interlock protection.

[0036] Specifically, the working principle and installation diagram of the coke oven monitoring device, which includes a reflector and a ranging device, are as follows: Figure 5, the reflector consists of two wedge-shaped bodies with an isosceles right triangle horizontal cross-section. The length of the right-angled side is a, and a is the arc length measured at the maximum allowable safe offset angle of the coke pot. One acute vertex of the isosceles right triangle is tangent to the circular horizontal cross-section of the coke pot. The reflector is installed symmetrically at the most prominent position on the side of the coke pot, ensuring that the inclined plane of the wedge-shaped body is the most protruding surface on the outer shell of the coke pot. The reflector can rotate and move together with the coke pot. The distance measuring device includes two laser rangefinders installed on the ground. The horizontal distance S1 of the ranging light emitted by the laser rangefinder > the length of the right-angled side a, ensuring that the ranging light is not concentrated on the same reflector. The maximum ranging distance from the rangefinder to the surface of the coke pot is S. Each rangefinder will measure the distances L1 and L2 from this device to the inclined plane of the reflector installed on the coke pot respectively, and transmit the ranging signal to the control system of the coke dry quenching hoist for interlocking. Since the inclined plane of the reflector is the most protruding surface of the coke pot, the distances from each point on its surface to the laser rangefinder will be the shortest compared to the points on the outer surface of the coke pot. That is, when the coke pot rotates and aligns, the measured values of L1 and L2 by the rangefinder can only be less than or equal to S, which is convenient to distinguish the inclined plane of the reflector and the outer surface of the coke pot through the difference in length.

[0037] When the coke pot carrier transports the coke pot and positions it under the lifting tower, the laser rangefinders measure the distances L1 and L2 to the inclined planes of the reflectors respectively. Due to the occlusion of the coke pot and the reflector, according to Figure 5 the geometric relationship shown, the measured length range by the rangefinder can only be between S - a and S. This can be used as a basis for judging the presence or absence of the coke pot. The control system of the hoist uses the measured values of the two laser rangefinders as a means of redundant detection for each other. Only when it is confirmed that both L1 and L2 are within the range of S - a and S can it be judged that there is a coke pot on the transport vehicle. If both L1 and L2 are greater than the maximum distance S, it is judged that there is no coke pot on the transport vehicle.

[0038] When the coke pot rotates in place and the coke pot carrier positions it under the lifting tower, the laser rangefinders measure the distances L1 = L2 to the center points of the reflectors respectively. Even if the coke pot moves in the ranging direction due to mechanical clearance, the measured distances become L1' and L2' respectively, but the coke pot that rotates and aligns can always ensure that the formula L1' = L2' holds, and each measured value is within the range of S - a and S. The control system of the hoist uses this as a basis for judging that the coke pot rotates in place. When the coke pot undergoes Figure 6 the deflection shown, the distances L1 ≠ L2 measured by the laser rangefinders to the reflector plates. If it deflects clockwise, then L1 > L2. If it deflects counterclockwise, then L1 < L2. Through geometric operations, it can be known that there is a proportional correspondence relationship between the deflection angle α of the coke pot and the value of L1 - L2. Under the condition of ensuring that the laser rangefinder can always measure the distance to the inclined plane of the reflector plate, when the maximum allowable deflection angle is α max in this case, the measured L1 at this time max - L2min The value will be the largest. Since the allowable deflection angle is small, the allowable deflection arc length is approximately a straight line. Therefore, a trigonometric function relationship exists between the deflection angle α and the L1-L2 value, i.e., b*tanα. max ≈L1 max -L2 min , where b≈(L1 max -L2 min )cotα max Let be the size factor of the coke pot. Furthermore, when α = 0°, L1 - L2 = 0, which still satisfies the condition b*tanα = L1 - L2. Based on this, the real-time deflection angle of the coke pot can be calculated when a certain degree of deflection occurs, but the deflection angle is within the allowable range. Since the allowable deflection arc length 'a' is very small compared to the radius R of the coke pot, it can be approximated as a straight line, thus yielding the formula... but Since there is a linear relationship between αmax and (L1max-L2min), the real-time deflection angle of the coke pot can also be calculated.

[0039] Based on the ground detection device's assessment of the coke can's condition and tilt angle, the hoist control system can perform safety interlock control according to the coke can's status. The logic flowchart is as follows: Figure 7 As shown: If no coke cans are detected on the transport vehicle (L1> and L2>S), the hoist control system will prohibit the hoist from lifting and only allow empty coke cans to be lowered. If coke cans are detected on the transport vehicle, the deflection angle of the coke cans will be determined.

[0040] or If the deviation angle is within the allowable range, the coke feeding process is allowed, and the actual deviation angle is calculated, recorded, and alarmed by the control system. If the deviation angle exceeds the allowable range, the coke feeding process is prohibited, and an anomaly is recorded and alarmed by the control system.

[0041] Specific implementation method: Refer to Figure 5, a coke pot monitoring device is manufactured. The reflector consists of two wedge-shaped bodies with horizontal cross-sections being isosceles right triangles. When the arc length of the coke pot changes by ±a within the allowable positioning angle range, the right-angled side length of the isosceles right triangle in the horizontal cross-section of the wedge-shaped body is a, where a is the arc length measured at the maximum allowable safety offset angle of the coke pot. One acute-angled vertex of the isosceles right triangle is tangent to the horizontal cross-section circle of the coke pot. The reflector is installed symmetrically at the most prominent position on the side of the coke pot, ensuring that the inclined plane of the wedge-shaped body is the most protruding surface on the outer shell of the coke pot. The reflector can rotate and move together with the coke pot. The ranging device includes two laser rangefinders installed on the ground. The horizontal distance S1 of the ranging light emitted by the laser rangefinder is greater than the right-angled side length a, ensuring that the ranging light is not concentrated on the same reflector. The maximum ranging distance from the rangefinder to the surface of the coke pot is S. Each rangefinder will separately measure the distances L1 and L2 from this device to the inclined plane of the reflector installed on the coke pot, and transmit the ranging signals to the control system of the dry quenching coke elevator for interlocking. Since the inclined plane of the reflector is the most protruding surface of the coke pot, the distances from each point on its surface to the laser rangefinder will be the shortest compared to the points on the outer surface of the coke pot. That is, when the coke pot rotates and is aligned, the measured values of L1 and L2 by the rangefinder can only be less than or equal to S, which is convenient for distinguishing the inclined plane of the reflector and the outer surface of the coke pot through the difference in length.

[0042] When the coke pot carrier transports the coke pot and positions it under the lifting tower, the laser rangefinders measure the distances L1 and L2 to the inclined planes of the reflectors. If there is no coke pot on the carrier at this time, the ranging laser of the laser rangefinder will pass through the position of the coke pot, and the measured values of L1 and L2 will be much greater than S. If there is a coke pot on the carrier at this time, due to the occlusion of the coke pot and the reflector, according to Figure 5 the geometric relationship shown, the measured length range by the rangefinder can only be between S - a and S, and it can be used to judge that there is a coke pot on the vehicle.

[0043] When the coke pot rotates to the right position and the coke pot carrier positions it under the lifting tower, the laser rangefinders measure the distances L1 = L2 or L1 - L2 = 0 to the center points of the reflectors. Even if the coke pot moves in the ranging direction due to mechanical clearance, the measured distances become L1' and L2' respectively, but the coke pot that is rotated and aligned can always ensure that the formula L1' = L2' or L1' - L2' = 0 holds, and each measured value is within the range of S - a and S. The control system of the elevator uses this as the basis to judge that the coke pot has rotated to the right position. When the coke pot undergoes Figure 6 the deflection shown, the distances L1≠L2 measured by the laser rangefinders to the reflector plates. If the clockwise deflection occurs, then L1〉L2; if the counterclockwise deflection occurs, then L1<L2. By calculating the difference between L1 and L2, it is possible to deduce the real-time deflection angle of the coke pot when the coke pot shows a certain deflection but the deflection angle is within the allowable range.

[0044] This serves as the basis for correcting the rotation position of the coke pot. A positive value indicates that the rotation has been overdone, and the coke pot can be rotated counterclockwise. A negative value indicates that the rotation has not been completed, and the coke pot can be rotated clockwise to the correct position.

[0045] Based on the ground detection device's assessment of the coke can's status and tilt angle, the hoist control system can perform logical processes according to the coke can's status. Figure 7 The safety interlock control system is as follows: If no coke cans are detected on the transport vehicle, the hoist control system will prohibit the hoist from lifting and only allow empty coke cans to be lowered. If a coke can is detected on the transport vehicle, the system will determine whether the deflection angle of the coke can is within the allowable range. If it is within the allowable range, the coke can delivery process is allowed, and the actual deflection angle is calculated, recorded, and alarmed by the control system. If the deflection angle exceeds the allowable range, i.e., one or all values ​​of L1 or L2 exceed the range Sa and S, reaching S, it indicates that the coke can deflection exceeds the allowable value. In this case, the coke can delivery process is prohibited, and an anomaly is recorded and alarmed by the control system. For cases where L1 or L2 shows other values, the hoist control system will treat it as an abnormal situation and shut down the system.

[0046] This embodiment only lists the method of using a wedge-shaped reflector to determine the presence and tilt angle of a coke pot. Other methods of using similar arc-shaped or flat reflectors for measurement and indirect measurement to determine the presence and tilt angle of a coke pot are also within the scope of this patent.

[0047] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A method for monitoring dry-quenched coke pots, characterized in that, The method includes the following steps: Step 1: Design a coke tank monitoring device, which includes a reflector and a distance measuring device. The reflector is installed on the protruding part of the rotating coke tank, and the distance measuring device is installed on the ground. The two distance signals measured are transmitted to the hoist control system. Step 2: The hoist control system uses the two measured distances L1 and L2 to logically determine whether there are coke cans on the transport vehicle; Step 3: In the presence of a coke can, the hoist control system calculates the angle of the coke can's tilt based on the two measured distances; Step 4: The hoist control system performs logic control based on the determination of the presence or absence of the coke can and the angle of the coke can tilt, so as to realize safety interlock protection; In step 1, a coke oven monitoring device is designed as follows: The coke oven monitoring device includes a reflector and a ranging device. The reflector consists of two wedge-shaped bodies with horizontal cross-sections of isosceles right triangles, with the length of the right angle side being 'a'. 'a' is the arc length calculated at the maximum allowable safe offset angle of the coke oven. The acute vertex of one of the isosceles right triangles is tangent to the circular horizontal cross-section of the coke oven. The reflector is installed symmetrically on the most prominent position on the side of the coke oven, ensuring that the inclined surface of the wedge-shaped body is the most convex surface on the coke oven shell. The reflector rotates and moves with the coke oven. The ranging device includes two laser rangefinders installed on the ground. The horizontal distance S1 of the ranging beam emitted by the laser rangefinder is greater than the length of the right angle side 'a', ensuring that the ranging beam is not concentrated on the same reflector. The maximum ranging distance from the rangefinder to the surface of the coke oven is S. Each rangefinder will measure the distances L1 and L2 from its own device to the inclined surface of the coke oven reflector, and transmit the ranging signal to the dry quenching coke elevator control system for interlocking. In step 2, after the coke tanker is positioned under the lifting tower, the laser rangefinder measures the distances L1 and L2 between the inclined surfaces of each reflector. Due to the obstruction of the coke tank and the reflectors, the length measured by the laser rangefinder can only be between Sa and S. This is used as the basis for judging whether there is a coke tank. Only when L1 and L2 are both within the range of Sa and S can it be determined that there is a coke tank on the transport vehicle. If L1 and L2 are both greater than the farthest distance S, it is determined that there is no coke tank on the transport vehicle.

2. The method for monitoring dry quenching coke pots according to claim 1, characterized in that: In step 3, after the coke can has rotated into position and the coke can transport vehicle is positioned under the lifting tower, the laser rangefinder measures the distance L1=L2 between the center points of each reflector, and all measured values ​​are within the ranges Sa and S. The hoist control system uses this as the basis for determining that the coke can has rotated into position. When the coke can deflects, a corresponding functional relationship is found between the deflection angle α and the value of L1-L2. Where L1max and L2min are the maximum value of L1 and the minimum value of L2 when the maximum allowable clockwise deflection occurs, respectively, and αmax is the maximum allowable deflection angle. These values ​​are calculated as follows: , where R is the radius of the coke pot.

3. The method for monitoring dry quenching coke pots according to claim 2, characterized in that: In step 4, if no coke cans are detected on the transport vehicle, the hoist control system will prohibit the hoist from lifting and only allow empty coke cans to be lowered. If a coke can is detected on the transport vehicle, it will determine whether the deflection angle of the coke can is within the allowable range. If it is within the allowable range, the coke can delivery process is allowed, and the actual deflection angle is calculated, recorded, and alarmed by the hoist control system. If the deflection angle exceeds the allowable range, that is, one or all values ​​of L1 or L2 exceed the range of Sa and S, it means that the coke can deflection exceeds the allowable value. In this case, the coke can delivery process is prohibited, and an abnormality is recorded and alarmed by the hoist control system. If other values ​​of L1 or L2 are found, the hoist control system will treat it as an abnormal situation and shut down the machine.

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