Fischer-Tropsch synthesis system, and method for separating fine catalyst powder in Fischer-Tropsch synthesis oil gas product
A Fischer-Tropsch synthesis and catalyst technology, which is used in the preparation of liquid hydrocarbon mixtures, the petroleum industry, and the treatment of hydrocarbon oil, etc., can solve the problems of affecting mass transfer and heat transfer, increasing the difficulty of catalyst fine powder, and unable to recover catalyst fine powder, etc. The effect of prolonging operation time and reducing accumulation
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specific Embodiment approach
[0053] In a specific embodiment of the present invention, the method also includes performing (b') backflushing cycle operation, passing the high-temperature oil gas containing catalyst fine powder into the branch pipeline connected in parallel with the magnetic separation settler, and simultaneously blowing backflush gas Pass into the magnetic separation settler for purging to remove the catalyst fine powder in the magnetic separation settler.
[0054] According to the invention, preferably, said separation periods are alternated with regeneration periods. Preferably, the duration ratio of the separation period (a) to the regeneration period (b) is 100-500:1; the regeneration period (b) is 10-120s.
[0055] According to the present invention, the specific implementation provided can control the magnetic separation settler to be in (a') magnetic separation period or (b') backflushing period. The time control of the above two cycles is carried out separately, and the setting c...
Embodiment 1
[0064] The scale of a single slurry bed reactor for the Fischer-Tropsch synthesis reaction in this example is 500,000 tons / year.
[0065] Feed gas (hydrogen-to-carbon ratio of 3) is subjected to Fischer-Tropsch synthesis reaction in a slurry bed reactor (9.6m in diameter, 6 in aspect ratio), the reaction temperature is 260°C, and the reaction pressure is 2.9MPa. The catalyst is an iron-containing catalyst (wherein, based on 100g of Fe, containing 2g of Potassium Oxide, 5g of Cu, 30g of SiO 2 , 8g of Mn).
[0066] The heavy wax is separated from the heavy component filtering device in the middle of the slurry bed reactor, and the high-temperature oil gas containing fine catalyst powder is discharged from the upper gas-liquid separation device (the temperature of the oil gas is about 250°C), and the high-temperature oil gas is subjected to the following cycle operation:
[0067] (a') Magnetic separation cycle, the high-temperature oil and gas are passed into the settler of the ...
Embodiment 2
[0076] The scale of a single slurry bed reactor for the Fischer-Tropsch synthesis reaction in this example is 160,000 tons / year.
[0077] The raw material gas (hydrogen-to-carbon ratio is 5) is subjected to Fischer-Tropsch synthesis reaction in a slurry bed reactor (diameter 5.8m, height-diameter ratio 7), the reaction temperature is 240°C, and the reaction pressure is 2.5MPa. The catalyst is an iron-containing catalyst (wherein, based on 100g of Fe, containing 6g of Potassium Oxide, 8g of Cu, 45g of SiO 2 , Mn of 0.1).
[0078] The heavy wax is separated from the heavy component filtering device in the middle of the slurry bed reactor, and the high-temperature oil gas containing catalyst fine powder is discharged from the upper gas-liquid separation device (the temperature of the oil gas is about 260 ° C), and the high-temperature oil gas is subjected to the following cycle operation:
[0079] (a') Magnetic separation cycle, the high-temperature oil and gas are passed into t...
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Abstract
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