What is the impact of oil content in Shell coal gasification transport gas?
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The gas (carbon dioxide or nitrogen) used to transport pulverized coal in Shell coal gasification is pressurized by a reciprocating compressor, resulting in a trace amount of oil (compressor lubricating oil) in the transported gas. Although an olefin filter is added to the compressor outlet, it cannot be oil-free. How much impact does this trace amount of oil have on the inflatable cone and ceramic filter? Discussion is welcome, thank you.
It has some impact on metal filtering equipment, but it should be noted that after using an oil filter, the CO2/N2 gas should be heated. It is best to add an electric heater to control the temperature of the pulverized coal bunker to be as high as 80 degrees. The N2 used to purge the oxygen pipeline must be separated from the compressed gas of the reciprocating compressor. The gas after vaporization of liquid nitrogen must be used, otherwise it will be dangerous. * * of.
There should not be a lot of compressor lubricating oil, and the adhesion to the media powder is not very large, so the problem is not big.
Over time, the accumulation of oil will spread to the sintered metal and cause blockage. Regular cleaning of the pipes or replacement of ventilation equipment should be able to control it within an acceptable range: (
The supporting compressor should be oil-free and lubricated. There is still a trace amount of oil. This can be solved by setting an oil adsorber at the end outlet of the compressor, and then heating the gas to above 80 degrees. This should have no effect on the filter and pulverized coal transportation.； However, for safety reasons, it is better not to use nitrogen pressurized by the compressor to purge the oxygen pipeline. Clean nitrogen should be used.
Liquid nitrogen vaporization is a good idea. I don’t believe there is still grease in the air separated directly.
The CO2 or N2 used to transport pulverized coal should be used separately from the N2 going to the sintered metal and filter. The purge nitrogen of the deoxygenation pipeline should be nitrogen gasified by air separation liquid nitrogen to ensure safety.