[Q&A Question 228] 2017.08.16
Thread Content
【Q&A Question 228】What are the hazards of taking time off on 2017.08.16? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) It disrupts the original axial force balance, causing the bearing to experience shock forces ； Prone to cause mechanical seal failure ； The vibration is high, which may cause damage to the internal components of the pump. The daily activity shuts down after 7 days, and the answers are displayed automatically. Scoring criteria: 2 Wealth points for incorrect attempts; 3–8 points for *incomplete* answers. 10 Wealth points for correct answers, provided with a detailed explanation; 15–20 Wealth points if the answer is correct but lacks sufficient details. Please score according to these criteria. Note: If there are editing records after answering, only points will be awarded to those who participated. For continuous malicious spamming, 2 points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters that have nothing to do with the answer are all considered malicious spamming; points will start to be deducted after three warnings. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Petrochemical Sector – “Creative Ideas for Energy Saving” Campaign (Phase 2 is in full swing) http://bbs.hcbbs.com/thread-1666758-1-1.html (Source: Haichuan Chemical Industry Forum Website)
It can easily cause the equipment container to be crushed and damaged!
A vacuum is created when there is a gap, damaging the equipment
Process fluctuations completed, equipment damaged
It disrupts the axial force balance, subjecting the bearings to shock forces and causing significant vibration, which leads to the failure of the mechanical seal
1. Unstable flow rate and pressure due to process issues. 2. Damaged impellers and excessive vibration in the equipment
The continuous nature of production in the petrochemical industry, along with its characteristics of high temperatures and flammability/explosivity, underscores the importance of the safe operation of high-temperature hot oil pumps. High-temperature hot oil pumps can catch fire if they leak, and improper handling can even lead to serious safety accidents. Mechanical seal leakage is the primary cause of leakage and fire accidents in high-temperature hot oil pumps. Vacuum breakdown is a common fault in the mechanical seals of hot oil pumps in refineries, especially during the initial stages of plant operation when the operations are not yet stable; vacuum conditions occur frequently at this time. Vacuum can lead to seal leakage, posing a significant threat to the safe operation of the plant.
Operationally, the decrease in pressure and flow makes it difficult to maintain stability； In terms of the equipment, pump cavitation can cause pitting or honeycombing damage near the inlet of the impeller, close to the front cover plate and the blade inlet. Breaking this balance will disrupt the original axial force equilibrium, subjecting the bearing to shock forces ； Prone to cause mechanical seal failure ； The vibration is high, which may cause damage to the internal components of the pump. In severe cases, it can also cause wear of the bearings and sealing elements, leading to leakage at the end-face seals, as well as shaft binding or shaft breakage.
1. Causes damage to the mechanical seal. 2. Causes damage to the impeller. 3. Prolonged operation leads to an increase in the temperature of the pump head, creating safety hazards. 4. Vibration of the pump can cause a series of problems such as loose bolts. 5. It causes interruptions in feeding, reflux, etc., leading to production accidents.
1. Cavitation occurs, eroding the impeller. 2. The transmission medium is interrupted. 3. Backflow may occur if the pump outlet check valve fails. 4. The seal is damaged.
1. Cavitation occurs, eroding the impeller； 2. Interruption of the conveying medium ； 3. If the check valve at the pump outlet fails, backflow will occur ； 4. Sealing damage.