In the fields of chemical production, pharmaceutical synthesis, and new material research and development, reaction vessels lined with zirconium materials are widely used due to their excellent corrosion resistance and high temperature stability. However, even such robust equipment may experience various potential failures after prolonged exposure to strong acids and bases or frequent pressure fluctuations. Regular comprehensive and meticulous inspections are crucial to ensure safe production and extend equipment lifespan. This article will provide a detailed introduction to the key inspection points of zirconium lined reaction vessels and techniques for timely detection and handling of hidden dangers.

1、 Appearance and sealing inspection

Every time the machine is shut down for maintenance, the first thing to do is toZirconium lined reactorConduct a visual inspection of the overall appearance. Pay close attention to whether there are cracks, deformations, or signs of localized corrosion, especially in the weld area and stress concentration areas. Use a flashlight to assist in illumination and carefully inspect the inner lining for peeling or bubbling. For minor defects discovered, their location and size should be promptly marked and recorded for subsequent tracking and monitoring of their development. At the same time, check whether all sealing surfaces (such as manhole covers and flange interfaces) are flat and smooth, and whether the sealing gaskets have aged, hardened, and lost elasticity. Replace gaskets made of polytetrafluoroethylene or other corrosion-resistant materials as necessary to ensure zero leakage operation.

2、 Thickness measurement and wear assessment

Regularly use ultrasonic thickness gauges to measure the actual thickness of zirconium lining, especially in areas with severe material erosion, such as near the mixing blade and around the discharge port. Compared with the original design data, if a significant thinning trend is found, the detection cycle should be shortened and the possibility of welding repair should be considered. For areas that have already experienced groove like wear, they can be smoothed with a grinding wheel and then coated with specialized ceramic coating to enhance their protective capabilities. It should be noted that excessive polishing will reduce the effective wall thickness, and the processing quantity must be strictly controlled.

3、 Pressure testing and leakage testing

Conducting a hydrostatic test according to relevant standards and specifications is a direct and effective method for testing the strength of the kettle body. Slowly increase the pressure to 1.5 times the working pressure and maintain it for more than 30 minutes. During this period, closely monitor the changes in the pressure gauge reading and the leakage situation at each connection. If conditions permit, nitrogen can also be filled for airtightness testing, and small leaks can be quickly located by applying soap and water. Once the abnormal pressure reduction speed is found to be too fast or bubbles are generated, immediately release the pressure and investigate the cause. Do not continue to operate with the disease.

4、 Mixing system calibration

The coaxiality deviation of the mixer can affect the mixing effect and even lead to increased mechanical vibration. Measure the radial runout of the spindle using a dial gauge and adjust the bearing clearance to the specified range. Check the tightening of the blade bolts to prevent loosening and uneven mass distribution. For reaction vessels driven by magnetic coupling, it is necessary to confirm that the magnetic transmission device is in good working condition to avoid magnetic attenuation affecting speed stability.

5、 Verification of temperature control system

The accuracy of the temperature control system is directly related to the reproducibility of the reaction conditions. Verify the accuracy of thermocouples or thermal resistance sensors and compare the displayed values with standard thermometers. Check the internal circulation of the heating/cooling coil and remove any possible air blockage issues. Debug PID control parameters to ensure a smooth heating curve without overshoot. Pay special attention to the issue of component aging after prolonged operation in high temperature ranges, and update expired heating rods or semiconductor refrigeration chips in a timely manner.

6、 Security Attachment Function Test

Protective devices such as safety valves and rupture discs must remain sensitive and reliable. Manually lift the safety valve lever and observe if the reseating is normal; Regularly replace bursting disc components that have reached the end of their service life. The emergency exhaust pipe should be unobstructed, and the discharge outlet should face the safe area. The interlocking alarm system should also be tested item by item to ensure that it can promptly activate the sound and light warning and cut off the feeding valve under dangerous working conditions.

In short, as a key production equipment, the safe and stable operation of the zirconium lined reactor relies on careful daily maintenance and periodic professional inspections. Through the detection methods and techniques of the above system, early warning signs of faults can be effectively identified, and preventive measures can be taken to avoid accidents. Enterprises should establish a sound equipment management system, train dedicated personnel to be responsible for implementing maintenance plans, ensure that each reactor can perform at its best, and provide solid support for continuous production.