Slurry reactor reaction system and method for Fischer-Tropsch synthesis reaction

Abstract

The invention relates to the field of Fischer-Tropsch, and discloses a slurry reactor reaction system and a method for a Fischer-Tropsch synthesis reaction. The reaction system comprises a slurry reactor, an internal heat exchange unit and an external heat exchange unit; the internal heat exchange unit is arranged inside the slurry reactor, the external heat exchange unit is arranged outside the slurry reactor, the external heat exchange unit comprises a steam pocket, a buffer tank and a heater which are sequentially connected in series, the heater is communicated with a lower water inlet in the internal heat exchange unit, and the steam pocket is communicated with an upper water outlet of the internal heat exchange unit; the internal heat exchange unit comprises a heat exchange pipe witha baffle. The heat exchange efficiency of the heat exchange unit inside the slurry reactor can be improved, the uniform and stable temperature inside the slurry reactor is ensured, when local temperature runaway of a catalyst happens, surplus heat brought by temperature runaway can be effectively removed in time, and then the yield of a target product is ensured.

Description

technical field [0001] The invention relates to the field of Fischer-Tropsch synthesis, in particular to a Fischer-Tropsch synthesis slurry-bed reaction system and a method for applying the Fischer-Tropsch synthesis slurry-bed reaction system for Fischer-Tropsch synthesis. Background technique [0002] With the continuous rise of oil prices in recent years, people pay more and more attention to the development of technologies to produce alternative oil products. Syngas is produced through coal, natural gas or other substances, and then according to the requirements of the Fischer-Tropsch synthesis catalyst for synthesis gas, through water-gas shift and synthesis The gas purification process processes the syngas, and uses the treated syngas as a raw material to produce hydrocarbons through Fischer-Tropsch synthesis, and at the same time produces oxygenated compounds, which are then processed by mature petroleum processing technology to produce high-quality, environmentally fri...

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Problems solved by technology

[0011] However, this kind of pin-fin heat exchanger has the characteristics of complicated manufacturing, and with the increase of the size of the reactor, it is necessary to increase the length and number of pin-fins on the tubes, which increases the heat transfer effect under the premise of ensuring the heat exchange effect. Manufacturing is difficult, and at the same time, the proportion of the cross-sectional area of ​​the heat exchange tubes to the cross-sectional area of ​​the reactor increases, which affects the fluid distribution inside the reactor and will lead to a decrease in the yield of the target product

[0012] In addition, the Fischer-Tropsch reaction is a strong exothermic reaction. Once the Fischer-Tropsch synthesis reactor has overheating, the heat exchanger has no measures to remove the excess heat in time, which will cause the test to fail in severe cases.

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