CN-122006613-A - Fischer-Tropsch reactor and Fischer-Tropsch reaction system

CN122006613ACN 122006613 ACN122006613 ACN 122006613ACN-122006613-A

Abstract

The disclosure relates to a Fischer-Tropsch reactor and a Fischer-Tropsch reaction system, wherein the Fischer-Tropsch reactor comprises a shell and a heat exchanger, the heat exchanger is arranged in the shell and used for adjusting the temperature in the shell, the heat exchanger comprises a first heat exchange area, a second heat exchange area and a third heat exchange area which are sequentially arranged from the central area of the heat exchanger to the peripheral side of the heat exchanger, and the heat exchange capacity of the second heat exchange area is larger than that of the first heat exchange area and that of the third heat exchange area. The liquid flow rate in the annular space area of the Fischer-Tropsch reactor is larger, the reaction degree is more severe, the reaction temperature is higher, the heat exchange capacity of the second heat exchange area is higher than that of the first heat exchange area and the third heat exchange area, at least part of the annular space area can be radiated, the reaction temperatures in the first heat exchange area, the second heat exchange area and the third heat exchange area are more average, the conversion rate of synthesis gas in the Fischer-Tropsch reactor is ensured, and the productivity of the Fischer-Tropsch reactor is improved.

Inventors

DU BING
BU YIFENG
ZHAO YONGMING
YANG RUYI
CHEN QIANG
MEN ZHUOWU

Assignees

国家能源投资集团有限责任公司
北京低碳清洁能源研究院

Dates

Publication Date: 20260512
Application Date: 20241112

Claims (10)

1. A fischer-tropsch reactor, comprising: A housing; The heat exchanger is arranged in the shell and used for adjusting the temperature in the shell, and comprises a first heat exchange area, a second heat exchange area and a third heat exchange area which are sequentially arranged from the central area of the heat exchanger to the outer peripheral side of the heat exchanger; the heat exchange capacity of the second heat exchange area is larger than that of the first heat exchange area and that of the third heat exchange area, and the projection of at least part of annular gap areas of the second heat exchange area and the shell in the first direction coincides.
2. A fischer-tropsch reactor according to claim 1, wherein the heat exchanger is configured as a tube array heat exchanger having a plurality of heat exchange tubes arranged along the direction of extension of the shell, and wherein the first, second and third heat exchange zones each have a plurality of heat exchange tubes arranged at intervals therein.
3. The fischer-tropsch reactor of claim 2, wherein the number of heat exchange tubes in the second heat exchange zone is greater than the number of heat exchange tubes in the first and third heat exchange zones.
4. A fischer-tropsch reactor according to claim 3, wherein the number of heat exchange tubes in the second heat exchange zone is 1.2-2 times the number of heat exchange tubes in the first heat exchange zone and/or the third heat exchange zone.
5. A fischer-tropsch reactor according to claim 2, wherein the sum of the projected areas of a plurality of the heat exchange tubes on the horizontal plane is 5-20% of the projected area of the shell on the horizontal plane on the same horizontal plane.
6. A fischer-tropsch reactor according to claim 1, wherein the projections of the first heat exchange zone in the first direction are circular, and the projections of the second and third heat exchange zones in the first direction are annular.
7. A fischer-tropsch reactor according to claim 6, wherein the ratio of the radius of the edges of the second heat transfer zone to the radius of the shell in the first direction is 0.5-0.85.
8. A fischer-tropsch reactor according to claim 1, wherein the housing comprises an inlet and an outlet arranged opposite in a first direction; A gas distributor is arranged at one side of the shell close to the inlet, and a gas-liquid separator is arranged at one side of the shell close to the outlet; The inner side wall of the shell is also provided with a liquid-solid separator.
9. A fischer-tropsch reactor according to any one of claims 1-8, wherein there are two of said heat exchangers, two of said heat exchangers being spaced apart in the direction of extension of the shell.
10. A fischer-tropsch reaction system comprising a fischer-tropsch reactor according to any one of claims 1-9.

Description

Fischer-Tropsch reactor and Fischer-Tropsch reaction system Technical Field The present disclosure relates to the field of fischer-tropsch reactor technology, and in particular, to a fischer-tropsch reactor and a fischer-tropsch reaction system. Background The ‌ fischer-tropsch reaction is a chemical process for converting synthesis gas (a mixture of carbon monoxide and hydrogen) into hydrocarbons, which is commonly used for the production of liquid fuels from coal, natural gas or biomass, and therefore has great significance for the development of alternative oil production technologies. At present, the internal temperature distribution of the Fischer-Tropsch reactor is large in difference when the Fischer-Tropsch reaction is carried out, and the conversion rate of raw material gas and the productivity of the Fischer-Tropsch reactor are affected. Disclosure of Invention It is an object of the present disclosure to provide a fischer-tropsch reactor and a fischer-tropsch reaction system, whereby the temperature differences in different areas within the fischer-tropsch reactor are reduced, to at least partially solve the above-mentioned technical problems. In order to achieve the above object, a first aspect of the present disclosure provides a fischer-tropsch reactor, which includes a shell, and a heat exchanger disposed in the shell and configured to regulate a temperature in the shell, where the heat exchanger includes a first heat exchange zone, a second heat exchange zone, and a third heat exchange zone sequentially disposed from a central area of the heat exchanger to an outer peripheral side of the heat exchanger, and a heat exchange capacity of the second heat exchange zone is greater than a heat exchange capacity of the first heat exchange zone and a heat exchange capacity of the third heat exchange zone, and a projection of the second heat exchange zone and at least a part of an annular space area of the shell in a first direction coincides with each other. Optionally, the heat exchanger is configured as a tube-in-tube heat exchanger with a plurality of heat exchange tubes, the plurality of heat exchange tubes are arranged along the extending direction of the shell, and the first heat exchange region, the second heat exchange region and the third heat exchange region are provided with a plurality of heat exchange tubes arranged at intervals. Optionally, the number of heat exchange tubes in the second heat exchange area is greater than the number of heat exchange tubes in the first heat exchange area and the third heat exchange area. Optionally, the number of the heat exchange tubes in the second heat exchange area is 1.2-2 times that of the heat exchange tubes in the first heat exchange area and/or the third heat exchange area. Optionally, the sum of the projected areas of the heat exchange tubes on the horizontal plane accounts for 5-20% of the projected area of the shell on the horizontal plane on the same horizontal plane. Optionally, the projection of the first heat exchange area in the first direction is circular, and the projections of the second heat exchange area and the third heat exchange area in the first direction are annular. Optionally, in the first direction, a ratio of a radius of an edge of the second heat exchange area to a radius of the housing is 0.5-0.85. Optionally, the shell comprises an inlet and an outlet which are oppositely arranged in a first direction, a gas distributor is arranged at one side, close to the inlet, of the shell, a gas-liquid separator is arranged at one side, close to the outlet, of the shell, and a liquid-solid separator is further arranged on the inner side wall of the shell. Optionally, two heat exchangers are arranged in the shell at intervals along the extending direction of the shell. In a second aspect of the present disclosure there is provided a fischer-tropsch reaction system comprising a fischer-tropsch reactor as described above. Through the technical scheme, the liquid flow rate in the annular space area of the Fischer-Tropsch reactor is large, the reaction degree is severe, the reaction temperature is high, the heat exchange capacity of the second heat exchange area is higher than that of the first heat exchange area and that of the third heat exchange area, and at least part of the annular space area can be radiated, so that the reaction temperatures in the first heat exchange area, the second heat exchange area and the third heat exchange area are relatively even, the conversion rate of synthesis gas in the Fischer-Tropsch reactor is ensured, and the productivity of the Fischer-Tropsch reactor is improved. Additional features and advantages of the present disclosure will be set forth in the detailed description which follows. Drawings The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with th