CN108815929B - Separation equipment for Fischer-Tropsch slurry bed reactor product - Google Patents
Separation equipment for Fischer-Tropsch slurry bed reactor product Download PDFInfo
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- CN108815929B CN108815929B CN201810630618.4A CN201810630618A CN108815929B CN 108815929 B CN108815929 B CN 108815929B CN 201810630618 A CN201810630618 A CN 201810630618A CN 108815929 B CN108815929 B CN 108815929B
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- 238000000926 separation method Methods 0.000 title claims abstract description 42
- 239000002002 slurry Substances 0.000 title claims abstract description 34
- 239000007791 liquid phase Substances 0.000 claims abstract description 78
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 239000012071 phase Substances 0.000 claims abstract description 29
- 239000000047 product Substances 0.000 claims abstract description 27
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 10
- 230000001174 ascending effect Effects 0.000 claims description 12
- 239000011949 solid catalyst Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 36
- 239000007790 solid phase Substances 0.000 abstract description 15
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000005191 phase separation Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000376 reactant Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/24—Multiple arrangement thereof
- B04C5/28—Multiple arrangement thereof for parallel flow
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The invention discloses separation equipment for a Fischer-Tropsch slurry bed reactor product, which comprises a shell and a cyclone separator group, wherein the shell is provided with a plurality of cyclone separators; the shell comprises a shell inner cavity, and a mixed liquid feeding hole is formed in the side wall of the shell; the cyclone separator group comprises a plurality of cyclone separators, a feed inlet of each cyclone separator is used for receiving Fischer-Tropsch slurry bed reaction products input from a mixed liquid feed inlet, and the top and the bottom of each cyclone separator are respectively provided with a gas-phase component outlet and a liquid-phase component outlet; a gas discharge hole is formed in the top of the shell; the area in the inner cavity of the shell, which is positioned below the liquid-phase component outlet of the cyclone separator, is a liquid-phase component accommodating area; the bottom of the shell is provided with an impurity discharge hole; the side wall of the shell is provided with a liquid phase discharge port corresponding to the position of the liquid phase component containing area. The invention provides a separation device and a separation process, which can separate gas, liquid and solid phases of slurry bed reaction, prevent internal parts of a separator from being blocked by solid phase particles and ensure that a filtered product meets the production requirement of a post-system.
Description
Technical Field
The invention relates to the technical field of chemical material separation, in particular to a Fischer-Tropsch reaction gas-liquid mixture separation device.
Background
Slurry bed reactors are widely used in the fields of coal chemical industry and petrochemical industry, and a slurry bed reactor is used in Fischer-Tropsch synthesis reaction, but because fine catalyst particles, liquid reactants and products are mixed together in the slurry bed reactor, the problem that reaction products, catalysts and the like are difficult to separate is caused, so that how to effectively separate catalyst fine powder particles from the reaction products is one of key technologies in the process of the slurry bed.
In the slurry bed reaction process, along with the reaction, the catalyst has the phenomena of abrasion and breakage, and the broken catalyst needs to be discharged out of the reactor along with slurry through periodic discharge, and fresh catalyst slurry is supplemented at regular intervals so as to ensure the activity of the catalyst in the reactor. However, when the reaction product is discharged from the top of the fischer-tropsch reactor, part of the fine catalyst powder is carried and flows out of the reactor at the same time, the fine catalyst powder will cause the gas-liquid phase separation effect in the product to be poor, and if the reaction product cannot be effectively separated, the metal substances in the catalyst will directly affect the product quality, so how to effectively separate the reaction product is a problem to be solved in slurry bed reaction. At present, there is no technical proposal for effectively dealing with the problem in the prior art documents.
Disclosure of Invention
The invention aims to solve the problems in the process of a slurry bed, and provides a separation device for a Fischer-Tropsch slurry bed reactor product, which can efficiently separate gas, liquid and solid phases in the slurry bed reaction, prevent the internal parts of a separator from being blocked by solid phase particles, and ensure that the filtered product meets the production requirements of a post-system.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
the invention provides separation equipment for a Fischer-Tropsch slurry bed reactor product, which comprises a shell and a cyclone separator group, wherein the shell is provided with a plurality of cyclone separators;
the shell comprises a shell inner cavity, and a mixed liquid feeding hole is formed in the side wall of the shell;
the cyclone separator group comprises a plurality of cyclone separators arranged in the inner cavity of the shell, a feed inlet of each cyclone separator is used for receiving Fischer-Tropsch slurry bed reaction products input from the mixed liquid feed inlet, and the top and the bottom of each cyclone separator are respectively provided with a gas-phase component outlet and a liquid-phase component outlet;
the top of the shell is provided with a gas discharge hole for outputting the gas-phase components flowing out of the gas-phase component outlet of the cyclone separator to the outside of the shell;
the area in the inner cavity of the shell, which is positioned below the liquid-phase component outlet of the cyclone separator, is a liquid-phase component accommodating area and is used for accommodating the liquid-phase component flowing out of the liquid-phase component outlet of the cyclone separator;
the bottom of the shell is provided with an impurity discharge hole for discharging impurities containing the solid catalyst deposited from the liquid-phase component in the liquid-phase component containing area out of the shell; and a liquid phase discharge port is formed in the side wall of the shell corresponding to the liquid phase component containing area.
Preferably, the feed inlet of the cyclone separator and the mixed liquid feed inlet are in the same horizontal position and face opposite. According to the invention, the feed inlet of the cyclone separator and the tangent line of the shell are in the same horizontal direction, so that the product of the Fischer-Tropsch slurry bed reactor can directly enter the cyclone separator by means of inertia after entering the separator; meanwhile, the pressure difference before and after the cyclone separator feeds is 2.8MPa, an inlet channel is narrowed when materials enter the cyclone separator, the gas flow velocity is increased, and then gas-liquid-solid three-phase separation of the materials in the cyclone separator is realized, and the internal parts of the separator are prevented from being blocked by solid-phase particles.
Preferably, the cyclone separator consists of a separation chamber, a gas riser and a liquid downcomer, the separation chamber is provided with outlets at the upper end and the lower end and a feeding hole at the side wall, the outlet at the upper end of the separation chamber is connected with the gas riser, and the top of the gas riser is provided with the gas-phase component outlet; the lower outlet of the separation chamber is connected with the liquid descending pipe, and the bottom of the liquid descending pipe is provided with the liquid phase component outlet.
Preferably, an upper baffle and a lower baffle are arranged in the shell, the upper baffle and the lower baffle are respectively positioned above and below the mixed liquid feeding hole, the upper baffle and the lower baffle separate an inner cavity of the shell and enable a cyclone separator group working area to be formed between the upper baffle and the lower baffle.
Preferably, the upper baffle plate is provided with a plurality of through holes for the gas ascending pipe to pass through and fix; the lower baffle plate is provided with a plurality of through holes for the liquid descending pipe to pass through and fix.
Preferably, the size of the through holes on the upper baffle is the same as the outer diameter of the gas riser; the size of the through hole on the lower baffle is the same as the outer diameter of the liquid descending pipe.
Preferably, each cyclone separator in the cyclone separator group is fixedly connected through a connecting piece, and the cyclone separator close to the inner wall of the shell is connected with the inner wall of the shell through the connecting piece.
Preferably, the gas riser coincides with the central axis of the liquid downcomer.
Preferably, a liquid phase discharge pump is arranged outside the liquid phase discharge port.
Preferably, the lower baffle plate is provided with an overflow port for flowing the liquid-phase component outside the cyclone group into the liquid-phase component accommodating zone.
The system and the method provided by the invention have the following beneficial effects:
after the product of the Fischer-Tropsch slurry bed reactor enters a feed inlet of the separation equipment, the material enters different cyclone separators of the cyclone separator group by means of inertia, the gas flow velocity is increased due to the narrowing of an inlet channel, so that the gas-liquid-solid three-phase separation of the material in the cyclone separators is realized, the separated gas-phase component is discharged to a gas-phase accommodating area in the inner cavity of the shell from a gas-phase ascending pipe, and the liquid-phase component and the solid-phase component are discharged to a liquid-phase accommodating area in the inner cavity of the shell from a liquid-phase descending pipe, so that the high-efficiency solid-liquid-gas three-phase separation of reactants is realized. After the solid-phase components and the liquid-phase components are slowly accumulated in the liquid-phase containing area, the liquid-phase components can be discharged out of the separation equipment through the liquid-phase discharge hole, and the solid-phase components are discharged out of the impurity discharge hole.
According to the invention, the solid, liquid and gas phases of the slurry bed reactor product are efficiently separated, so that the separation effect of the light and heavy components is improved, heavy components in the gas phase in the Fischer-Tropsch slurry bed reactor product are also avoided, the blockage of catalyst fine powder carried in the reaction product on each internal part in the separation equipment is prevented, the service cycle of the separation equipment is prolonged, and the subsequent production requirements are met.
Drawings
FIG. 1: the invention provides a longitudinal section schematic diagram of a separator;
FIG. 2: the invention provides a structural schematic diagram of a lower baffle plate;
FIG. 3: the invention provides a schematic diagram of a partial structure of a cyclone separator;
FIG. 4: the invention provides a process flow for separating the product of a Fischer-Tropsch slurry bed reactor;
the device comprises a shell 1, a shell 2, a cyclone separator group 2-1, a feed inlet 2-2, a gas phase component outlet 2-3, a liquid phase component outlet 2-4, a separation chamber 2-5, a gas ascending pipe 2-6, a liquid descending pipe 3, a mixed liquid feed inlet 4, a gas discharge outlet 5, a liquid phase discharge outlet 6, an impurity discharge outlet 7, a liquid phase discharge pump 8, an upper baffle 9, a lower baffle 10, a through hole 11, a connecting piece 12, a cyclone separator 13 and an overflow port.
Detailed Description
The invention is described in further detail below:
as shown in FIG. 1, the separation equipment for the Fischer-Tropsch slurry bed reactor product comprises a shell 1 and a cyclone separator set 2; the shell 1 comprises a shell inner cavity, a mixed liquid feeding port 3 is arranged on the side wall of the shell 1, and the cyclone separator group 2 is composed of a plurality of cyclone separators 12 which are arranged in the shell inner cavity as shown in figure 3.
The reaction product of the Fischer-Tropsch slurry bed is conveyed to a feed inlet 2-1 of a cyclone separator 12 from a mixed liquid feed inlet 3, as shown in figure 3, the cyclone separator 12 consists of three parts, namely a separation chamber 2-4, a gas ascending pipe 2-5 and a liquid descending pipe 2-6, the separation chamber 2-4 is provided with an upper end outlet, a lower end outlet and a feed inlet 2-1 positioned on the side wall, the upper end outlet of the separation chamber 2-4 is connected with the gas ascending pipe 2-5, and the top of the gas ascending pipe 2-5 is provided with a gas phase component outlet 2-2; the lower outlet of the separation chamber 2-4 is connected with a liquid downcomer 2-6, and the bottom of the liquid downcomer 2-6 is provided with a liquid phase component outlet 2-3.
As shown in fig. 1, two baffles which divide an inner cavity of the shell into three relatively closed chambers are arranged in the shell 1, namely an upper baffle 8 and a lower baffle 9, the upper baffle 8 and the lower baffle 9 are respectively positioned above and below a mixed liquid feed port 3, the upper baffle 8 and the lower baffle 9 separate the inner cavity of the shell and form a working area of a cyclone separator group 2 between the upper baffle 8 and the lower baffle, namely the working area of the cyclone separator group 2 is arranged below the upper baffle 8, and a gas phase component accommodating area is arranged above the working area; below the lower baffle 9 is a liquid phase component holding zone and above it is the working zone of the cyclone bank 2.
In some preferred embodiments, the upper baffle plate 8 is provided with a plurality of through holes 10 for the gas risers 2-5 to pass through and fix; the lower baffle 9 is provided with a plurality of through holes 10 for the liquid descending pipes 2-6 to pass through and fix. The arrangement of the upper baffle 8 and the lower baffle 9 ensures that the material entering from the mixed liquid feeding port 3 can only be separated in the chamber of the cyclone separator group 2, thereby preventing the liquid phase component in the material from flying into the gas phase component containing area and ensuring the separation effect of the material. In some further preferred embodiments, the size of the through holes 10 in the upper baffle 8 is kept the same as the outer diameter of the gas risers 2-5; the size of the through hole 10 on the lower baffle 9 is the same as the outer diameter of the liquid downcomer 2-6, so that the relative sealing performance of each chamber is further ensured, and the separation effect of the slurry bed reactor product is ensured.
The top of the shell 1 of the separating device is provided with a gas outlet 4 which is used for outputting the gas-phase components flowing out from the gas-phase component outlet 2-2 of the cyclone separator 12 to the outside of the shell 1. The region of the inner cavity of the housing 1 below the liquid-phase component outlet 2-3 of the cyclone 12 is a liquid-phase component accommodating region for accommodating the liquid-phase component flowing out of the liquid-phase component outlet 2-3 of the cyclone 12; the bottom of the shell 1 is provided with an impurity discharge port 6 for discharging impurities containing the solid catalyst deposited from the liquid-phase component contained in the liquid-phase component containing region out of the shell 1; the side wall of the casing 1 is provided with a liquid phase discharge port 5 at a position corresponding to the liquid phase component containing region.
As shown in fig. 1, the gas phase components obtained after the product of the reactor of the fischer-tropsch slurry bed passes through each cyclone 12 in the cyclone group 2 enter a gas containing area above an upper baffle 8 through a gas riser 2-5, and then are discharged out of the shell 1 through a gas discharge port 4, so that the separation of the gas phase components is completed; similarly, liquid phase and solid phase components obtained after the reactor product of the Fischer-Tropsch slurry bed is separated by the cyclone separator group 2 flow into a liquid phase containing area at the lower part of the shell 1 through the liquid descending pipe 2-6, solid phase impurities can slowly precipitate to the bottom of the shell 1, and when the liquid phase material is accumulated to the position of the liquid phase discharge port 5, a switch of the liquid phase discharge port 5 can be opened to discharge the separated liquid phase material.
In some preferred embodiments, a liquid phase discharge pump 7 is connected to the outer edge of the liquid phase discharge port 5, and the separated liquid phase is sent to a subsequent processing device for subsequent processing through the liquid phase discharge pump 7.
In some preferred embodiments, the feed 2-1 to the cyclone 12 is at the same level and facing opposite the mixed liquor feed 3. Therefore, the product of the Fischer-Tropsch slurry bed reactor coming from the mixed liquid feeding hole 3 can directly enter the cyclone separator 12 to be separated under the driving of high-speed airflow, and the separation efficiency is improved.
In some preferred embodiments, the central axes of the gas-phase component outlet 2-2 and the liquid-phase component outlet 2-3 coincide.
In some preferred embodiments, each cyclone separator 12 at the center inside the casing 1 is fixedly connected with each other through a connecting piece 11; the cyclone 12 close to the inner side wall of the casing 1 is also fixed with the casing 1 by a connecting piece 11, so that the stability of the separating equipment during operation is further improved.
In some preferred embodiments, after the fischer-tropsch slurry bed reactor product enters the shell 1, some liquid phase or solid phase product cannot enter the cyclone 12 to be separated and remains in the chamber of the cyclone group 2 between the upper baffle 8 and the lower baffle 9, in order to prevent the residual liquid phase and solid phase from affecting the separation effect of the equipment, as shown in fig. 2, the lower baffle 9 is provided with an overflow port 13 for leaking out the residual liquid phase and solid phase product, and the residual flows into the liquid phase component accommodating area through the overflow port 13 to further perform liquid-solid separation.
As shown in fig. 4, by using the process flow of product separation of the fischer-tropsch slurry bed reactor provided by the present invention, a gas-liquid-solid three-phase mixture with catalyst carried at the top of the fischer-tropsch synthesis reaction tower enters the shell 1 from the mixture feed inlet 3 along a pipeline, the mixture enters each small cyclone 12 along a tangent line under high-speed gas flow, in each cyclone 12, a liquid-phase product and solid-phase catalyst particles carried out are thrown to the wall of the cyclone 12 under the action of centrifugal force in the cyclone, and fall to the bottom of the lower baffle 9 through the liquid-phase component outlets 2-3 along the wall under the action of gravity; the gas phase product is condensed in the cyclone separator 12 and flows to the center, enters the upper part of the upper baffle 8 through the gas phase component outlet 2-2, and is discharged out of the shell 1 from the gas phase discharge port 4, so that the three-phase high-efficiency separation of gas phase, liquid phase and solid phase in the product of the Fischer-Tropsch slurry bed reactor is realized. The separated liquid phase is sent to a subsequent treatment device at a liquid phase discharge port 5 through a liquid phase discharge pump 7, and the solid catalyst deposited at the bottom of the shell is discharged from an impurity discharge port 6.
The present invention has been described above, and the embodiments are only exemplary and are not intended to limit the scope of the present invention. Numerous modifications, changes, or substitutions will occur to those skilled in the art without departing from the spirit of the invention. Therefore, various equivalent changes made according to the present invention are still within the scope of the present invention.
Claims (6)
1. A separation equipment of Fischer-Tropsch slurry bed reactor product is characterized in that:
comprises a shell (1) and a cyclone separator group (2);
the shell (1) comprises a shell inner cavity, and a mixed liquid feeding hole (3) is formed in the side wall of the shell (1);
the cyclone separator group (2) comprises a plurality of cyclone separators (12) arranged in the inner cavity of the shell, a feed inlet (2-1) of each cyclone separator (12) is used for receiving Fischer-Tropsch slurry bed reaction products input from the mixed liquid feed inlet (3), and the top and the bottom of each cyclone separator (12) are respectively provided with a gas-phase component outlet (2-2) and a liquid-phase component outlet (2-3);
the top of the shell (1) is provided with a gas discharge hole (4) for outputting gas-phase components flowing out of the gas-phase component outlet (2-2) of the cyclone separator (12) to the outside of the shell (1);
the area in the inner cavity of the shell (1) below the liquid-phase component outlet (2-3) of the cyclone separator (12) is a liquid-phase component accommodating area which is used for accommodating the liquid-phase component flowing out of the liquid-phase component outlet (2-3) of the cyclone separator (12);
the bottom of the shell (1) is provided with an impurity discharge hole (6) for discharging impurities containing the solid catalyst deposited from the liquid-phase component in the liquid-phase component containing region out of the shell (1); a liquid phase discharge port (5) is formed in the side wall of the shell (1) corresponding to the liquid phase component containing area;
an upper baffle (8) and a lower baffle (9) are arranged in the shell (1), the upper baffle (8) and the lower baffle (9) are respectively positioned above and below the mixed liquid feeding port (3), the upper baffle (8) and the lower baffle (9) separate an inner cavity of the shell, and a working area of the cyclone separator group (2) is formed between the upper baffle (8) and the lower baffle (9);
the cyclone separator (12) consists of a separation chamber (2-4), a gas ascending pipe (2-5) and a liquid descending pipe (2-6), the separation chamber (2-4) is provided with outlets at the upper end and the lower end and a feed inlet (2-1) at the side wall, an outlet at the upper end of the separation chamber (2-4) is connected with the gas ascending pipe (2-5), and the top of the gas ascending pipe (2-5) is provided with the gas phase component outlet (2-2); the lower end outlet of the separation chamber (2-4) is connected with the liquid descending pipe (2-6), and the bottom of the liquid descending pipe (2-6) is provided with the liquid phase component outlet (2-3);
the upper baffle (8) is provided with a plurality of through holes (10) for the gas ascending pipes (2-5) to pass through and fix; the lower baffle (9) is provided with a plurality of through holes (10) for the liquid down pipes (2-6) to pass through and fix; and an overflow port (13) is formed in the lower baffle (9) and is used for enabling the liquid-phase component outside the cyclone separator group to flow into the liquid-phase component accommodating area.
2. The separation apparatus of claim 1, wherein: the feed inlet (2-1) of the cyclone separator (12) and the mixed liquid feed inlet (3) are positioned at the same horizontal position and face oppositely.
3. The separation apparatus of claim 2, wherein: the size of the through hole (10) on the upper baffle (8) is the same as the outer diameter of the gas ascending pipe (2-5); the size of the through hole (10) on the lower baffle (9) is the same as the outer diameter of the liquid downcomer (2-6).
4. A separation apparatus according to any one of claims 1 to 3, wherein: the cyclone separators (12) in the cyclone separator group (2) are fixedly connected through connecting pieces (11), and the cyclone separators (12) close to the inner wall of the shell (1) are connected with the inner wall of the shell (1) through the connecting pieces (11).
5. The separation apparatus of claim 3, wherein: the gas ascending pipe (2-5) is coincided with the central axis of the liquid descending pipe (2-6).
6. The separation apparatus of claim 5, wherein: and a liquid phase discharge pump (7) is arranged outside the liquid phase discharge port (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810630618.4A CN108815929B (en) | 2018-06-19 | 2018-06-19 | Separation equipment for Fischer-Tropsch slurry bed reactor product |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810630618.4A CN108815929B (en) | 2018-06-19 | 2018-06-19 | Separation equipment for Fischer-Tropsch slurry bed reactor product |
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| CN108815929B true CN108815929B (en) | 2021-11-05 |
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| CN105087056B (en) * | 2014-05-15 | 2017-01-11 | 中石化洛阳工程有限公司 | Three-phase separator |
| CN105457338B (en) * | 2016-01-05 | 2017-09-12 | 中国海洋石油总公司 | Multitube gas-liquid-solid three-phase eddy flow pre-separating system and its application process |
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