Measures for removing tar and dust from equipment and pipelines
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As the title suggests, tar and dust accumulate in pipes over time due to long-term operation, which can lead to blockages. What are some effective solutions?
This large-diameter pipe can be accessed manually for cleaning, while those with a smaller diameter can only be cleaned by removing sections of the pipe. There really isn’t any other good solution, especially when it comes to dealing with coal tar.
In the case of refineries, substances such as oil coke formed due to scale in pipelines have large molecular weights, making it difficult for them to be emulsified and dispersed. By adding oxidants, these substances are oxidized and broken down into ones with smaller molecular weights, allowing them to be emulsified and dispersed in the cleaning solution
You can try hiring a professional cleaning company.
Some use high-temperature steam, which is somewhat effective, but it only provides a temporary solution to the problem. Long-term eradication still relies on effective ammonia cleaning.
On the gasification unit, we remove scale deposits using high-pressure water guns; I’m not sure if this method can be applied here as well
For pipes that are in operation, it is possible to increase the flow rate of the medium and keep the temperature inside the pipes between 70 and 90, thereby preventing sharp fluctuations. If it is a non-flowing pipeline, dead zones that may exist can be kept to a minimum, and heat tracing (using multiple tubes) can be added
1. Stabilize the flow rate and velocity of the medium within the pipeline, reduce sedimentation at various points along the pipeline, and this can be achieved by using methods such as reciprocating circulation to maintain a stable flow rate. 2. To clean equipment clogged with tar, such as heat exchangers, steam can be introduced on the shell side or the tube side for cleaning; after that, high-pressure cleaning with steam can be carried out, which results in a faster cleaning speed and better outcomes.