Debugging process and precautions for PLC systems in industrial boilers

If you don’t understand something, just don’t try to handle it randomly. Hehe; I think the feedwater system in boilers is quite important

If I decide to pursue this career in the future, I hope to find some answers here, :)

You’d better consult a professional boiler technician about this, as with fuel or gas boilers, there is a risk of explosion if misused.

I’m mainly responsible for debugging automated control systems such as PLCs before they go into operation, so it’s not too bad.

For simple debugging, use whatever method is the most convenient. If you’re driving, forget it – the drum liquid level is extremely important! Be careful, as improper tuning can pose a risk of explosion!

I have worked on debugging several boilers in our factory, and in my opinion, there are the following key points: 1. First of all, it’s necessary to test the control system separately from the actual instruments and valves on site. 2. Test the ignition system. 3. Test the interlock systems. 4. Pay special attention to testing the boiler’s water supply system as well as the interlocks related to the boiler’s liquid level. 5. Most importantly, it’s essential to keep good records (this is my personal opinion; state-owned enterprises place a lot of emphasis on this)

For the tuning of a PLC-controlled boiler system, I think it’s necessary to first prepare a tuning plan. It is divided into a process section and an instrumentation section. The operational aspects include checking that the boiler is installed correctly, examining the status of the valves, ensuring proper tightness, performing boiler cleaning, and verifying that the fuel supply is unobstructed. The instrumentation section involves checking whether the various instruments are installed and calibrated, the wiring of the electrical control circuits, and reviewing the ladder diagrams within the PLC. Burner commissioning. Local debugging, full debugging. Make a table of the debugging items and check them one by one.

Hello, I’ve just started this job. Could you explain it in more detail? For example, the specifics of each step involved in the work, etc

This specific matter needs to be handled on a case-by-case basis; you can add me on QQ at 459935308

This post was last edited by harvey89 on 2015-7-8 at 11:11. I have seen this question in previous written exams; a certain industrial equipment installation company was contracted to carry out the installation work for the mechanical and electrical equipment in an industrial boiler room, with the boilers being of a bulk type. Due to the delayed arrival of the equipment, the construction schedule is extremely tight. The commissioning plan prepared by the chief engineer of the project department does not specify any clear requirements regarding the boiler’s water treatment system; moreover, it suggests that in order to shorten the commissioning period, the auxiliary equipment should be tested together with the main boiler unit. During the load test, the boiler, which had been running for 26 hours, had to be shut down due to a malfunction in the feedwater system. As the owner was eager to start operations, they requested that the construction party fix the faults and then allow the facility to operate for another 22 hours before commencing construction. 1. According to the relevant international regulations and standards, who is responsible for the load testing of industrial boilers? Who will conduct the inspection? 2. Can the trial operation plan initially prepared by the project department pass the review and approval? Why? 3. What is the duration of the load test after adjusting the safety valve on an industrial boiler? Are the owner’s requirements regarding operating time reasonable? Why? 4. What are the criteria for successful commissioning of industrial boilers? 1. The load testing of industrial boilers shall be carried out by the construction unit, with inspection and acceptance conducted by special equipment inspection and testing institutions approved by the state council’s department in charge of special equipment safety supervision and management. 2. The trial operation plan initially prepared by the project department could not pass the review and approval. Reason: Water treatment plays an important role in the economic and safe operation of boilers; therefore, the commissioning plan must specify clear requirements regarding water treatment, and only after these requirements are met can the commissioning process proceed. In addition, all the auxiliary equipment of the boiler are devices that must operate properly during the boiler’s commissioning process; these auxiliary devices must function at full load successfully before the boiler can be brought online. The initial plan to conduct a joint trial run would not pass the review and approval. 3. After adjusting the safety valve of industrial boilers, the load test operation period is 48 hours. The owner’s requirements for operation are inappropriate. Reason: The so-called trial operation time refers to the continuous operating time; once the trial operation is interrupted, the time has to be counted from scratch and cannot be accumulated. 4. Qualification criteria for the commissioning of industrial boilers: 1) The system shall be put into operation in full accordance with the design requirements, and operate stably and continuously for 48 hours without interruptions. 2) Personnel participating in the trial operation should possess the skills for starting up, shutting down, handling accidents, and adjusting process conditions.