【Daily Question】1.3 Short-answer question: Why does the equipment need to stop operating periodically?
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Last edited by Catalyzing a Grain on 2016-1-12 08:43. Brief question: Why does the plant need to be shut down periodically? After operating for a certain period of time, the process pipelines and various equipment suffer from corrosion, thinning, scaling, fatigue damage, etc., which prevents them from meeting the requirements of production. If the wall of certain high-temperature pipelines thins due to corrosion, it may lead to perforations and accidents in severe cases. After operating for a certain period of time, heat exchangers will develop scale, which affects heat transfer efficiency; in severe cases, this leads to an increase in pressure drop. Various auxiliary equipment inside the tower can be damaged due to corrosion, erosion, and so on. Some of the above cannot be replaced or cleaned at the time of startup. The equipment also needs to undergo technical upgrades. Therefore, the above tasks such as updates, cleaning, and modifications can only be carried out by stopping the device; the duration of this shutdown for maintenance depends on the actual circumstances. Correct answer: +5, In-depth discussion: +10 @Guan Gongyu
During the operation of the device, due to its high degree of continuity, some equipment may appear during the on-the-fly production process. Process-related issues can only be resolved through periodic maintenance to ensure the safe operation of production
Machines can also get fatigued; overuse can lead to problems.
To ensure the safe operation of enterprises, as well as the proper functioning of mechanical and electrical equipment, pipes, and valves, and to increase the service life of such equipment and improve production efficiency, it is necessary to carry out periodic inspections and maintenance on mechanically operated equipment that runs continuously. This is done to prevent mechanical or electrical failures from disrupting production, or to avoid casualties resulting from such failures
1. Process requirements, such as the service life of catalysts. 2. Major repairs are necessary: When mechanical equipment operates for a long time, faults accumulate to a certain extent, and maintenance becomes essential. The heat exchanger is fouled, resulting in reduced efficiency; it needs to be cleaned. 3. Market demand: For certain types of equipment, the market for their products experiences periodic fluctuations, with maintenance work being carried out during off-peak periods. 4. **Legal and regulatory requirements. That’s all I can think of. . . . . . . By taking the above points into account during the major repair, the maintenance time can be determined in the most cost-effective manner.
Summary of Safety Work for the Major Overhaul Summary of Safety Work for the Major Overhaul The workshop leadership attached great importance to this major overhaul; throughout the entire process, the workshop adhered to the principle of putting safety first, strengthened safety management during the overhaul period, and improved safety measures
Maintain and inspect the main equipment, and replace some necessary wear parts.
The periodic shutdown of a plant is actually determined by the operational characteristics of the equipment and instruments within it. For example, safety valves need to be calibrated once a year, and some instruments also require regular calibration. Additionally, there are limits on the number of hours that rotating equipment such as compressors can operate safely and without failures; this limit can range from 4,000 hours to 8,000 hours, with some units even capable of operating for 25,000 hours. Due to these special reasons, the equipment needs to be shut down periodically for maintenance.
Check the equipment of the device and whether the pipelines are in good condition.
It’s just like with people – over time, problems will arise, so regular check-ups are necessary to take preventive measures and maintain a healthy body in the long term.
At the end of the operating cycle, operations are halted for maintenance; the containers, towers, and equipment are inspected, evaluated, and assessed to determine the feasibility of continuing operation