Reasons why coke falls into the quenching tower during quenching
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Our company has experienced on several occasions the situation where the door used for quenching coke suddenly opened during this process, causing coke to fall into the quenching tower. This not only delays the extraction of coke but also poses risks during cleanup. Could colleagues please advise on the causes of this issue and possible solutions? I am extremely grateful.
May I ask, does the hydraulic system of your coking quench vehicle have an accumulator? I think there should be. If not, where does the power come from to make the hydraulic cylinder move? With an accumulator, I think it’s either due to an operational error or a system failure that causes a signal short circuit, which in turn causes the system to automatically open the solenoid valve and connect the oil circuit, leading to this phenomenon. If there is no accumulator, then the coke discharge door opens under the action of external forces; it may be the impact force generated by the boiling of coke during the coke quenching process that causes the door to open. Therefore, it is necessary to check the seals of the hydraulic cylinders to see if there are any leaks, as well as to check whether the solenoid valves have any leaks.
Such a situation has not occurred in our unit yet; it is likely that there is a problem with the electrical system of your coking quenching vehicle. I agree with what was said above, and it’s also important to pay attention to the operating procedures!
Check whether it is due to insufficient compressed air pressure, which caused the pipe leading from the air cylinder to the coke discharge door to rupture; this in turn led to insufficient pressure at the actuator and its opening. The pressure of the quenching water might also be a factor, as the intense scouring force on the coke, along with the increased steam pressure generated, could contribute to this issue
1. When closing the door, coke got stuck, preventing it from closing properly; this led to high pressure during coke quenching, which forced the door to open. This is a human error, and it is necessary to improve personnel management by repeating the process several times to ensure everything is correct before loading more coke. 2. There are issues with the hydraulic system used for closing the doors; it is necessary to improve the management of equipment maintenance. This post was last edited by Wulongdao on 2009-4-11 13:10]
If the cylinders are used to power the coke quenching vehicle, the main reasons are as follows: 1. The gas pipeline from the air pump to the cylinders often contains liquid in winter, which freezes and blocks the pipeline, resulting in insufficient air pressure. There isn’t enough power. There has been a case of red coking falling to the ground. 2. Wear of piston rings, resulting in air leakage. 3. The signal wires of the solenoid valve are not properly protected; they remain submerged in quenching water for long periods, leading to electrical leaks and erroneous operations. After switching to a hydraulic system, no accidents have occurred since.
1. Human operational error. 2. There is a fault in the hydraulic system for opening the doors of the coking car.
The solution is to install a proximity switch at the position of the door switch arm, weld a stop bar in place, and add an operation indicator light in the control room; this way, a light alarm will be activated in the control room if the door is not closed. In winter, more fluid needs to be drained due to lower air pressure, so it’s necessary to check the seals of the hydraulic cylinders for any leaks, as well as check whether the solenoid valves are leaking as well. For hydraulics, it is necessary to check the seals of the hydraulic cylinders to see if there are any leaks, as well as to check whether the solenoid valves have any leaks. It means the light turns on when the arm is extended, and it turns off when the arm is retracted! I’m not good at expressing myself clearly; I’m sorry!
Our company has had it before, mainly due to human error. Mechanical causes are minimal. The hydraulic system is not functioning properly; there are leaks and the solenoid valves are worn out.
Thank you to all those who participated. After thorough checks by various departments within the company, it was finally determined that there was a problem with the valve body of the solenoid valve.