Method of on-line pretreatment inhibiting coking by hydrocarbon pyrolysis apparatus
A cracking device and pretreatment technology, applied in cracking, non-catalytic thermal cracking, petroleum industry and other directions, can solve the problems of carburizing the inner wall of the furnace tube, carburizing the furnace tube, uneconomical, etc. Erosion resistance and improved service life
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[0033] The content of the present invention will be further clarified below in conjunction with an example, but this example does not limit the scope of protection of the present invention.
[0034] The example shows a comparison between the coated sample and the uncoated test with a self-made laboratory device. The schematic diagram of the cracking test device is shown in Figure 1.
[0035] The heating furnace uses a two-stage temperature-controlled tubular heating furnace with a heating length of 1000mm; the cracking tube uses a HK40 tube with an outer diameter of 25mm and a length of 200mm, and the length of the preheating part of the front section is 1m. When pretreating the cracking tube, sulfur and silicon-containing compounds enter the cracking furnace tube along with water vapor, depositing a composite coating of sulfur and silicon dioxide, using carbon disulfide and tetramethoxysilane. Among them, the atomic ratio of sulfur to silicon is 2:1, the ratio of silicon compound...
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