CN-116987516-B - Method for monitoring coke dry quenching coke tank

Abstract

The invention relates to a method for monitoring a coke tank for dry quenching, which comprises the following steps of designing a coke tank monitoring device which comprises a set of reflectors and a distance measuring device, wherein the reflectors are arranged on protruding parts of a rotary coke tank, the distance measuring device is arranged on the ground and transmits two measured distance signals to a lifting machine control system, step 2, the lifting machine control system logically judges whether a coke tank exists on a carrier vehicle according to the two measured distances L1 and L2, step 3, the lifting machine control system calculates the deflection angle of the coke tank according to the two measured distances in the case of the existence of the coke tank, and step 4, the lifting machine control system logically controls according to the existence of the coke tank and the deflection angle of the coke tank, so as to realize safe linkage protection. The scheme ensures the production safety of the dry quenching hoister by carrying out safety interlocking control with the control system of the dry quenching hoister.

Inventors

• DING HAIQUAN

Assignees

• 上海梅山钢铁股份有限公司

Dates

Publication Date

20260505

Application Date

20220425

Claims (3)

1. 1. A method of monitoring a dry quenching coke drum, the method comprising the steps of: Step 1, designing a coke tank monitoring device which comprises a set of reflectors and a ranging device, wherein the reflectors are arranged at the protruding parts of a rotary coke tank, the ranging device is arranged on the ground, and the two measured distance signals are transmitted to a control system of a lifting machine; step2, the elevator control system logically judges whether a coke tank exists on the carrier vehicle according to the two measured distances L1 and L2; Step 3, under the condition that a coke tank exists, calculating the deflection angle of the coke tank by a control system of the elevator according to the two measured distances; step 4, the elevator control system carries out logic control according to the judged existence of the coke tank and the deflection angle condition of the coke tank, so as to realize safety interlocking protection; In the step 1, a coke tank monitoring device is designed, which comprises a set of reflectors and a ranging device, wherein the reflectors are two wedge-shaped bodies with isosceles right triangles in horizontal cross section, the right angle side length is a, a is the arc length measured by the coke tank on the maximum safe offset angle allowed, the acute angle vertex of the isosceles right triangle is tangent to the horizontal cross section circle of the coke tank, the reflectors are arranged at the most protruding position of the side surface of the coke tank in an axisymmetric manner, the wedge-shaped body inclined surface is ensured to be the most protruding surface on the coke tank shell, the reflectors rotate and move together with the coke tank; in step 2, under the condition that the coke tank is positioned under the lifting tower, the distance between the inclined planes of the reflectors measured by the laser distance measuring instrument is L1 and L2, the length range measured by the laser distance measuring instrument can only be between S-a and S due to shielding of the coke tank and the reflectors, the method is used as a judging basis for existence of the coke tank, the existence of the coke tank on the transportation vehicle can be judged only by confirming that the L1 and the L2 are in the S-a and S ranges, and if the L1 and the L2 are larger than the farthest distance S, the existence of the coke tank on the transportation vehicle is judged.
2. 2. The method for monitoring a dry quenching coke tank according to claim 1, wherein in step 3, under the condition that the coke tank rotates in place and the coke tank carrier vehicle is positioned under the lifting tower, the laser range finder measures the distance L1=L2 of the center point of each reflector, each measured value is in the range of S-a and S, the elevator control system takes the measured value as the basis for judging that the coke tank rotates in place, when the coke tank deflects, a corresponding functional relation exists between the deflection angle alpha and the value of L1-L2, Wherein L1max and L2min are the maximum value of L1 and the minimum value of L2 when the maximum allowable clockwise deflection occurs, and αmax is the allowable maximum deflection angle, calculated Wherein R is the radius of the coke drum.
3. 3. The method for monitoring dry quenching coke cans according to claim 2, wherein in step 4, if no coke cans are detected on the carrier vehicle, the elevator control system prohibits the elevator from lifting, only allows the empty coke cans to be put down, if the coke cans are detected on the carrier vehicle, judges whether the deflection angles of the coke cans are within an allowable range, allows the coke can feeding process, calculates the actual deflection angles to the elevator control system, records and alarms if the deflection angles are within the allowable range, and prohibits the coke can feeding process and carries out abnormal recording and alarming to the elevator control system if the deflection angles are beyond the allowable range, namely, if one or all of the values of L1 or L2 are beyond the S-a and S-range, and the elevator control system stops the process as an abnormal condition if other values of L1 or L2 occur.

Description

Method for monitoring coke dry quenching coke tank Technical Field The invention relates to a monitoring method, in particular to a method for monitoring a coke dry quenching coke tank, and belongs to the technical field of electrical equipment control. Background In the coke oven dry quenching production process, the coke tank is dragged by a coke tank carrier vehicle on the dry quenching car to finish the work of receiving red coke in a coke oven area and receiving and delivering the coke tank in the dry quenching area. The equipment structure of coke tank carrier vehicle under dry quenching hoist derrick is as shown in figure 1, there are parts such as coke tank revolving stage 1, can follow rotatory coke tank of revolving stage, coke tank hoist on the coke tank platform truck, there are two coke tank bottom doors 3 at the coke tank bottom, there are locking groove 4 on the bottom door, there are slot hook 5 and lug 6 on the hoist, after the coke tank platform truck is fixed in good position under the hoist derrick, lifting hook 7 in the hoist derrick begins to hoist the hoist, the slot hook 5 of hoist can imbed locking groove 4 and carry out coke tank bottom door mechanical locking, ensure that red burnt can not reveal in whole hoist lifting process. Because the monitoring of the focusing tank is completed by a sensor and a control system on the carrier vehicle, whether the coke tank is arranged on the vehicle or not and whether the coke tank rotates to a positioning axis position 2 or not are confirmed by installing a switching value sensor, a rotary encoder and the like on the carrier vehicle, and the subsequent interlocking flow operation is carried out with a dry quenching hoister system. The sensor works in vibration and high-temperature areas, so that the failure rate of the sensor is high, and safety accidents caused by the failure of the sensor are more. When the signal of the vehicle-mounted sensor for detecting whether the coke tank exists is usually in failure, the control system still receives a false signal of 'the existence of the tank' even if the coke tank exists on the carrier vehicle, at the moment, the vehicle-mounted control system can not carry out a subsequent coke tank receiving and emptying process under a derrick of a hoist, and the schematic diagram is shown in fig. 2, and the red coke burning accident of the carrier vehicle without the coke tank can be caused by coke receiving in a coke oven area. When the signal of the vehicle-mounted sensor for detecting whether the coke tank exists or not does not fail, the control system still receives a false signal of no tank even if the coke tank exists on the carrier vehicle, at this time, the vehicle-mounted control system stops the carrier vehicle with the coke tank under the derrick of the hoist for subsequent tank receiving flow, so that a heavy tank accident is caused, and a schematic diagram is shown in fig. 3. When the coke tank is not accurately detected by the coke tank selecting and loading alignment sensor or the encoder, and the rotary coke tank cannot reach the positioning axis position 2, the control system enables the lifting machine to lift according to a normal linkage process, the slot hooks 5 of the lifting machine cannot be embedded into the locking slots 4 for mechanically locking the doors due to deflection of the coke tank, after the lifting hook 7 of the lifting machine starts to lift, the two bottom doors of the coke tank are opened under the self weight and extrusion of red coke, so that an accident of burning carrier vehicles is caused, and the accident schematic diagram is shown in fig. 4. Therefore, whether the signal of the vehicle-mounted sensor is reliable or not determines the production safety of the vehicle, and even though the functions of redundancy detection and the like are added, the following problems are still encountered in the practical use: 1. the vehicle-mounted control system relies on the switching value limit detection coke tank on the trolley to carry out chain protection, and the switching value limit is damaged at the same time, so that safety accidents are easily caused. 2. The vehicle-mounted control system confirms whether the coke tank rotates in place or not depending on the limit of the switching value or a rotary encoder and the like, and the coke tank fault rate of the equipment close to high temperature is higher, so that safety accidents are easy to cause after abnormal signal detection occurs. 3. The mechanical clearance between the coke tank and the carrier vehicle is large, and the problem that limit signals cannot be detected often occurs. The sensor installed in the high temperature and vibration area has high failure rate and large maintenance amount. Disclosure of Invention The invention provides a method for monitoring a coke dry quenching tank, aiming at the problems existing in the prior art, which eliminates the safety accidents caused by the faults of a vehicle-m