Common faults have reaction kettle shell damage (corrosion, crack, through hole), reaction kettle which is over pressure or over temperature, reaction kettle seal leakage, reduce motor current, magnetic coupling actuator with friction noise, etc., each failure is cause the cause of the failure and solutions, hope the reaction kettle operators can master these little knowledge, once the reaction kettle failure could judge for themselves failure problems.
I. damage of reaction shell (corrosion, crack, through-hole)
Fault cause:
1. Medium corrosion (pitting corrosion, intercrystalline corrosion)
2. Crack or alkali embrittlement occurs under the influence of thermal stress
3. wear thin or uniform corrosion
Solutions:
1. The shell with corrosion resistant material lining shall be repaired or locally welded
2. The stress should be eliminated after welding and the cracks should be repaired
3. If the minimum allowable thickness is exceeded, the body shall be replaced
Ⅱ. Overtemperature and overpressure of reaction kettle
Fault cause:
1. instrument failure, not strict control
2. Wrong operation;Improper ratio of raw materials;Produce a violent reaction
3. Adverse reactions occur due to poor heat transfer or stirring performance
4. The inlet valve is out of order; the inlet pressure is too high and the pressure is high
Solutions:
1. Check and repair the automatic control system and strictly follow the operation rules
2. according to the operation method, take emergency release, according to the provisions of quantitative timing feeding, strictly prevent misoperation
3. Increase heat transfer area or remove scale, improve heat transfer effect and repair agitator, and improve stirring efficiency
4. Close the main steam valve, cut off the steam and repair the valve
