Glass lined reactor re-enamelling precautions

The glass lined reactor needs to pay attention to a number of aspects before and during the use of re-enamelling to ensure its safe and stable operation and prolong the service life. The following are several key issues that need special attention after the glass-lined reactor is re-enamelled:

1. Comprehensive inspection and acceptance

Appearance inspection: after the completion of the re-enamelling, the first appearance inspection is carried out to ensure that the surface of the new glass lining layer is smooth, without cracks, bubbles or other defects. Any obvious defects may affect the performance of the glass lining layer.

Thickness Measurement: Use a tool such as an ultrasonic thickness gauge to measure the thickness of the new glass lining to ensure that it meets the requirements of the manufacturer or industry standards. An excessively thin layer may be quickly damaged in service.

Hardness Test: Evaluate the physical properties of the new glass-lined layer with a hardness test to ensure that it is sufficiently abrasion and impact resistant.

Pressure test: The reactor is pressure tested to simulate the pressure and temperature under actual working conditions and to check for leaks or other structural problems.

Chemical compatibility test: If the kettle will be used to handle new chemical media, it is recommended that a chemical compatibility test be carried out to ensure that the new glass-lined layer is able to withstand the corrosion of these media.

2. Gradual warming and cooling

Avoid rapid cooling and heating: The glass lining is very sensitive to temperature changes, especially rapid cooling and heating, which can lead to thermal stresses in the glass lining and increase the risk of cracking. Therefore, in the first use after re-enamelling, the temperature should be slowly raised to the working temperature and gradually lowered during shutdown to avoid sudden temperature changes.

Preheating and cooling time: according to the specific model and working conditions of the reactor, make a reasonable preheating and cooling schedule. Normally, the rate of each heating up or cooling down should not exceed 50°C per hour (specific values should refer to the manufacturer's recommendations).