What are the factors that affect the longest operating cycle of an aqueous urea plant?
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What are the factors that affect the longest operating cycle of an aqueous urea plant? Is it an operational reason or an equipment problem? Or what about other external factors? Please fully discuss it based on the actual situation of our factory for mutual learning. * , learn from and improve. In order to fully discuss this issue, non-aqueous urea please do not post, thank you for your cooperation! This post was last edited by lxq700918 on 2009-4-5 11:18 ]
Most are operational reasons, followed by equipment.
It depends on the equipment status of the entire system and whether the capabilities match. For example, the diameter of the granulation tower is designed to be small, and the capacity of the previous system has been expanded after modification. The granulation tower is the key to the long-term cycle.； The heat exchange effect of the water cooler in summer is an influencing factor ； The operating cycle of key operating equipment such as compressors, ammonia pumps, methane pumps, and urea melt pumps ； Granulating nozzles, etc. This post was last edited by lxq700918 on 2009-4-5 22:36 ]
The most common reasons are equipment and external factors. The equipment problem was mainly leakage of the equipment, so it had to be stopped. External factors are mainly caused by thunderstorms in summer causing power outages. There are basically no shutdowns caused by operational reasons in our factory!
The independent shutdown of the urea system is basically an emergency, such as power outage, water outage, etc., and the long-term period is almost always affected by the ammonia system. Our company's work goal is that the urea system can only be shut down for maintenance along with the ammonia system, otherwise you will be punished during the assessment.
The most important thing in urea production is coordination and process stability. Personally, I think it has a lot to do with the operating level of the operator. Equipment reasons are mainly manifested during the original drive.
Three reasons: 1. Process reasons: Affected by external conditions, such as steam, raw gas, ammonia production, instruments, electrical, circulating water, packaging section, etc. Internal overtemperature and overpressure, etc. 2. Equipment reasons: Pipeline flange leakage, heat exchanger, separator excessive flushing, pump component failure, etc. 3. Human reasons: The process operators made mistakes, the maintenance workers did not meet the quality standards, etc.