The kettle lid lifting reaction kettle is a commonly used reaction equipment in the fields of chemistry, pharmaceuticals, etc. Its correct use and maintenance are crucial for ensuring experimental safety and improving production efficiency. However, in practical operation, there are some common usage misconceptions, and the following are detailed descriptions of these misconceptions:

1、 Insufficient preparation before operation

-Neglecting equipment integrity checks

-Failure to carefully inspect the kettle body for any scratches, cracks, or damage to the sealing surface may result in medium leakage or even explosion during the reaction process. For example, if the sealing cone is damaged due to collision, even if the bolt is tightened, effective sealing cannot be achieved.

-Neglecting the functional testing of the lifting device, such as failing to verify whether the lifting guide rail is smooth and whether the hydraulic system is leaking oil, may result in failure to press down the kettle cover or cause the lifting to stall, leading to safety accidents.

-No sealing test and pressure calibration have been conducted

-Directly using untested equipment, especially in high-pressure reaction scenarios, may pose a danger due to seal failure. The correct approach is to conduct a graded pressure test with inert gas (such as nitrogen) before feeding.

-The flow meter and temperature sensor were not calibrated, resulting in process parameters deviating from expectations and affecting the reaction effect.

2、 Installation and sealing operation errors

-Incorrect bolt tightening method

-Failure to tighten the main bolts symmetrically along the diagonal or applying excessive force at once can easily cause the kettle cover to tilt and the sealing gasket to experience uneven stress, resulting in failure. The correct method should be to gradually apply force multiple times to ensure even contact of the sealing surface.

-Threaded connectors that have not been lubricated may be difficult to disassemble due to friction corrosion after long-term use.

-Improper selection and maintenance of sealing components

-Using sealing materials that are not resistant to high temperatures or corrosion to treat highly corrosive media accelerates the aging and deformation of the sealing ring. For example, when handling acidic materials, gaskets wrapped in Teflon should be used instead of ordinary rubber.

-Reusing worn seals or mixing gaskets of different specifications during installation increases the risk of leakage.

3、 Violations during operation

-Pressure operation and rapid temperature change

-Forcefully opening the kettle lid when the pressure inside the kettle is not fully released may cause the lid to pop out or the mechanical structure to be damaged due to residual pressure. The pressure gauge must be reset to zero before operation.

-Immediately introduce cooling water or heating source after the reaction is complete, as drastic temperature changes can cause thermal stress cracks in the kettle body. It is recommended to adopt a stepped cooling method, with a control rate of ≤ 80 ℃/h.

-Overloading and uncontrolled mixing

-If the material filling exceeds 80% of the volume, it may cause the reaction solution to overflow or the stirring blade to overload and stop running. The loading factor should be strictly limited according to the calibrated capacity of the equipment.

-If the mixing speed is not adjusted according to the viscosity of the material, high viscosity materials may splash into the sealed area and contaminate the equipment during high-speed operation.

4、 Lack of maintenance and upkeep

-Unclean cleaning and omission of rust prevention treatment

-Residual chemical substances form scale on the inner wall of the kettle, which not only affects the purity of subsequent reactions, but may also corrode the metal surface. Rinse with ethanol or acetone after each use and store dry.

-The moving parts such as the lifting screw and bearings are not regularly coated with rust proof grease, which can easily rust and get stuck in humid environments, shortening the service life of the equipment.

-Lack of periodic deep maintenance

-Relying solely on daily cleaning and neglecting annual comprehensive maintenance, failure to promptly detect issues such as worm gear wear and hydraulic oil deterioration. It is recommended to disassemble and inspect key components every 10 uses.

-Failure to record device operation logs makes it impossible to trace potential failure modes behind abnormal data, increasing the risk of sudden shutdowns.

The safe and efficient operation of the kettle lid lifting reaction kettle relies on standardized operation, meticulous maintenance, and scientific management. Avoiding the above misconceptions can not only reduce accident rates, but also significantly improve equipment lifespan and experimental reproducibility.