CN221015949U - Feeding mixing section structure of catalytic cracking riser - Google Patents
Feeding mixing section structure of catalytic cracking riser Download PDFInfo
- Publication number
- CN221015949U CN221015949U CN202322787054.4U CN202322787054U CN221015949U CN 221015949 U CN221015949 U CN 221015949U CN 202322787054 U CN202322787054 U CN 202322787054U CN 221015949 U CN221015949 U CN 221015949U
- Authority
- CN
- China
- Prior art keywords
- riser
- annular
- mixing section
- catalytic cracking
- fixed ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004523 catalytic cracking Methods 0.000 title claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 238000004891 communication Methods 0.000 claims abstract description 13
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 19
- 239000003054 catalyst Substances 0.000 abstract description 18
- 238000006243 chemical reaction Methods 0.000 abstract description 13
- 239000002245 particle Substances 0.000 abstract description 9
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 239000000047 product Substances 0.000 description 8
- 238000005336 cracking Methods 0.000 description 7
- 239000007795 chemical reaction product Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000008041 oiling agent Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 diesel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The utility model discloses a feeding mixing section structure of a catalytic cracking riser, which relates to the technical field of petrochemical industry and comprises a riser and a raw material feeding pipe, wherein a shell is fixedly arranged on the outer wall of the riser, an auxiliary air inlet pipe is fixedly arranged on the outer wall of the shell, a plurality of annular blocks are uniformly formed on the inner side of the riser, a communication groove is formed in the annular blocks, and an air guide plate is fixedly arranged in the communication groove. The hemispherical convex blocks at the bottom of the connecting column equally divide the upward-moving oil mixture, so that the upward-moving oil mixture enters a space surrounded by the annular block and the fixed ring block, and the oil mixture is further mixed and reacted; simultaneously outside air feed subassembly is with auxiliary gas through auxiliary gas inlet pipe entering cover shell inside, rethread intercommunication groove and air guide plate make auxiliary gas blow the oil agent mixture rise fast, reduce because the product in the reaction process drives catalyst particle back mixing, make oil agent mix more even and abundant.
Description
Technical Field
The utility model relates to the technical field of petrochemical industry, in particular to a feeding mixing section structure of a catalytic cracking riser.
Background
The catalytic cracking process has a very important role in the petroleum processing industry in China, and provides more than 70% of gasoline and about 30% of diesel in the market in China. The riser reactor is one of the core units for catalytic cracking; the high-value target products of gasoline, diesel oil, liquefied gas and the like are obtained in the gasoline.
Depending on the role played in the cracking reaction process, the whole riser reactor can be generally divided into four parts from bottom to top, namely a pre-lifting section, a feed mixing section, a full reaction section and an outlet rapid separation section, wherein pre-lifting steam (gas) enters from the bottom of the riser in the pre-lifting section, is mixed and contacted with the catalyst introduced by the regeneration inclined tube, and carries the catalyst particle group to move upwards. When the catalyst reaches the feeding mixing section, the catalyst particles are mixed and contacted with the raw oil sprayed by the atomizing nozzle, and rapidly start to react to generate target products such as gasoline, diesel oil, liquefied gas and the like.
In the full reaction section, the oil and agent mixture moves upwards and continuously carries out cracking reaction; when reaching the riser end outlet rapid separation zone, the reaction products such as diesel, gasoline, etc. and catalyst are rapidly separated under the influence of the rapid separation system to prevent excessive cracking.
The riser can be divided into 4 parts from bottom to top, including a pre-riser section, a feed mixing section, a full reaction section and an outlet fast partition, according to the role played in the cracking reaction; in the feed mixing section, the contact and mixing conditions between the feedstock and the catalyst will directly affect the overall cracking reaction process; after the reaction between the raw oil and the catalyst generates a product, the product is wrapped up by the gas at the bottom of the lifting pipe to one end, and the oil mixture is gathered and converted into oil drops from original oil mist in the rising process, so that the rising speed of the oil mixture is reduced, the product is easy to wrap up the catalyst particles to react with the raw oil mist, and adverse side reactions occur to influence the cracking reaction.
Disclosure of utility model
The utility model aims at: in order to solve the problem that the product is easy to be wrapped by catalyst particles to be backmixed when the raw oil reacts with the catalyst so as to influence the cracking reaction, the feeding mixing section structure of the catalytic cracking riser is provided.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the feeding mixing section structure of the catalytic cracking riser comprises a riser, wherein a plurality of raw material feeding pipes are fixedly arranged at the bottom of the riser, a casing is fixedly arranged on the outer wall of the riser, an auxiliary air inlet pipe is fixedly arranged on the outer wall of the casing, and the auxiliary air inlet pipe is connected with an external air supply assembly;
The inner side of the lifting pipe is uniformly formed with a plurality of annular blocks, a communication groove is formed in the annular blocks, the communication groove is communicated with the lifting pipe and the casing, an air guide plate is fixedly arranged in the communication groove, and the shape of the air guide plate is matched with the shape of the outer wall of the annular blocks;
The inner wall fixed mounting of riser has the connecting rod of staggered connection and the connecting rod is located the upper portion of annular piece, connecting column is fixed mounting to the staggered point bottom of connecting rod, the outer wall shaping of connecting column has a plurality of evenly distributed's fixed ring piece, and fixed ring piece is located between two annular pieces.
As still further aspects of the utility model: the angle of the air guide plate is opposite to the upper inclined surface of the fixed ring block, and the outer walls of the lifting pipe, the annular block, the connecting rod, the connecting column and the fixed ring block are smooth;
hemispherical bumps are formed at the bottoms of the connecting columns.
As still further aspects of the utility model: the raw material feeding pipe is positioned between the feeding mixing section and the pre-lifting section of the riser reactor, and the raw material atomizing nozzle is arranged in the raw material feeding pipe.
As still further aspects of the utility model: the included angle between the raw material feeding pipe and the axis of the lifting pipe is an acute angle.
As still further aspects of the utility model: the annular block and the fixed ring block are equal in shape, and the distance between the annular block and the fixed ring block is smaller.
Compared with the prior art, the utility model has the beneficial effects that:
The hemispherical convex blocks at the bottom of the connecting column equally divide the upward-moving oil mixture, so that the upward-moving oil mixture enters a space surrounded by the annular block and the fixed annular block, and the oil mixture is further mixed and reacted; simultaneously outside air feed subassembly is with auxiliary gas through auxiliary gas inlet pipe entering cover shell inside, rethread intercommunication groove and air guide plate make auxiliary gas blow the oil agent mixture rise fast, reduce because the product in the reaction process drives catalyst particle back mixing, make oil agent mix more even and abundant.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model;
Fig. 3 is a schematic diagram of the structure of fig. 2a according to the present utility model.
In the figure: 1. a riser; 2. a raw material feed pipe; 3. a casing; 4. an auxiliary air inlet pipe; 5. an annular block; 6. a communication groove; 7. an air guide plate; 8. a connecting rod; 9. a connecting column; 10. and fixing the ring block.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 3, in an embodiment of the present utility model, a feed mixing section structure of a catalytic cracking riser includes a riser 1, a plurality of raw material feed pipes 2 are fixedly installed at the bottom of the riser 1, a casing 3 is fixedly installed on an outer wall of the riser 1, an auxiliary gas inlet pipe 4 is fixedly installed on an outer wall of the casing 3, and the auxiliary gas inlet pipe 4 is connected with an external gas supply assembly;
A plurality of annular blocks 5 are uniformly formed on the inner side of the lifting pipe 1, a communication groove 6 is formed in the annular block 5, the communication groove 6 is communicated with the lifting pipe 1 and the casing 3, an air guide plate 7 is fixedly arranged in the communication groove 6, and the shape of the air guide plate 7 is matched with the shape of the outer wall of the annular block 5;
Connecting rods 8 which are connected in a staggered manner are fixedly arranged on the inner wall of the lifting pipe 1, the connecting rods 8 are positioned at the upper parts of the annular blocks 5, connecting columns 9 are fixedly arranged at the bottoms of staggered points of the connecting rods 8, a plurality of uniformly distributed fixed ring blocks 10 are formed on the outer wall of each connecting column 9, and the fixed ring blocks 10 are positioned between the two annular blocks 5;
The angle of the air guide plate 7 is opposite to the upper inclined surface of the fixed ring block 10, and the outer walls of the lifting pipe 1, the annular block 5, the connecting rod 8, the connecting column 9 and the fixed ring block 10 are smooth;
hemispherical bumps are formed at the bottoms of the connecting columns 9;
The raw material feeding pipe 2 is positioned between the feeding mixing section and the pre-lifting section of the riser reactor, and a raw material atomizing nozzle is arranged in the raw material feeding pipe 2;
the included angle between the raw material feeding pipe 2 and the axis of the lifting pipe 1 is an acute angle;
The annular block 5 and the fixed ring block 10 are equal in shape, and the distance between the annular block 5 and the fixed ring block 10 is small.
In this embodiment: when the device mixes materials, pre-lifting gas at the bottom of the lifting pipe 1 carries catalyst particles into a mixing section, and the catalyst particles are mixed and contacted with raw oil sprayed from a raw material atomizing nozzle in a raw material feeding pipe 2, and rapidly start to react;
The oil mixture moves upwards under the drive of gas, is equally divided by hemispherical lugs at the bottom of the connecting column 9, and enters a space surrounded by the annular block 5 and the fixed ring block 10, and the space is smaller, so that the contact between the raw oil and the catalyst is tighter, and the reaction speed is increased;
Simultaneously, an external air supply assembly enables auxiliary air to enter the inside of the casing 3 through the auxiliary air inlet pipe 4, and then the auxiliary air blows the oiling agent mixture to pass through between the annular block 5 and the fixed block 10 rapidly through the communication groove 6 and the air guide plate 7, so that the oiling agent mixture rises in an accelerating way;
The catalyst and the reaction product in the oil mixture are pushed to rise by the auxiliary gas and the pre-lifting gas together, so that the adverse reaction of the catalyst and the raw oil driven by the reaction product caused by aggregation of the oil mixture is avoided, and the back mixing of the catalyst particles driven by the product in the reaction process is reduced, so that the oil mixture is more uniform and full.
The foregoing description is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical solution of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (5)
1. The feeding mixing section structure of the catalytic cracking riser comprises a riser (1), wherein a plurality of raw material feeding pipes (2) are fixedly arranged at the bottom of the riser (1), and the catalytic cracking riser is characterized in that a casing (3) is fixedly arranged on the outer wall of the riser (1), an auxiliary gas inlet pipe (4) is fixedly arranged on the outer wall of the casing (3), and the auxiliary gas inlet pipe (4) is connected with an external gas supply assembly;
a plurality of annular blocks (5) are uniformly formed on the inner side of the lifting pipe (1), a communication groove (6) is formed in the annular blocks (5), the communication groove (6) is communicated with the lifting pipe (1) and the casing (3), an air guide plate (7) is fixedly arranged in the communication groove (6), and the shape of the air guide plate (7) is matched with the shape of the outer wall of the annular blocks (5);
The inner wall fixed mounting of riser (1) has connecting rod (8) and connecting rod (8) are located the upper portion of annular piece (5), connecting column (9) are fixed to connecting rod (8) crisscross some bottom, the outer wall shaping of connecting column (9) has a plurality of evenly distributed's fixed ring piece (10), and fixed ring piece (10) are located between two annular pieces (5).
2. The feeding mixing section structure of the catalytic cracking riser according to claim 1, wherein the angle of the air guide plate (7) is opposite to the upper inclined surface of the fixed ring block (10), and the outer walls of the riser (1), the annular block (5), the connecting rod (8), the connecting column (9) and the fixed ring block (10) are smooth;
the bottom of the connecting column (9) is provided with a hemispherical bump.
3. The feed mixing section structure of a catalytic cracking riser according to claim 1, wherein the raw material feed pipe (2) is located between the riser reactor feed mixing section and the pre-lifting section, and the raw material atomizing nozzle is installed inside the raw material feed pipe (2).
4. The feed mixing section structure of a catalytic cracking riser according to claim 1, wherein the feedstock feed pipe (2) forms an acute angle with the axis of the riser (1).
5. The feed mixing section structure of a catalytic cracking riser according to claim 1, wherein the annular block (5) and the fixed ring block (10) are equal in shape and the distance between the annular block (5) and the fixed ring block (10) is small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322787054.4U CN221015949U (en) | 2023-10-18 | 2023-10-18 | Feeding mixing section structure of catalytic cracking riser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322787054.4U CN221015949U (en) | 2023-10-18 | 2023-10-18 | Feeding mixing section structure of catalytic cracking riser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221015949U true CN221015949U (en) | 2024-05-28 |
Family
ID=91135025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322787054.4U Active CN221015949U (en) | 2023-10-18 | 2023-10-18 | Feeding mixing section structure of catalytic cracking riser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221015949U (en) |
-
2023
- 2023-10-18 CN CN202322787054.4U patent/CN221015949U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113663607B (en) | Downer reactor and method of operating same | |
| CN100584445C (en) | Stirring/flow-guiding multi-phase reactor | |
| CN108636298A (en) | The oxonation device of synthesis gas preparing ethylene glycol device | |
| CN102533311B (en) | Axial-flow ultrashort contact cyclone reactor | |
| CN221015949U (en) | Feeding mixing section structure of catalytic cracking riser | |
| CN105368479A (en) | Novel flow aid technology promoting mixing of raw oil and catalyst in catalytic cracking riser feeding area | |
| CN100540133C (en) | A kind of gas liquid ejecting combined slurry bed acetic acid, aceticanhydride carbonyl reaction kettle | |
| CN1058046C (en) | Catalyst cracking method for producing in high-yield olefin and lift-leg reaction system thereof | |
| CN114452903A (en) | Oxo gas-liquid reactor | |
| CN100420731C (en) | Coal hydrogenation reaction device and its industrial application | |
| CN201988373U (en) | Pre-lifter capable of improving catalyst distribution | |
| CN217248807U (en) | Oxo gas-liquid reactor | |
| CN109232522B (en) | Sulfolane continuous production system and process | |
| CN217699118U (en) | Reactor for generating cyclohexene by benzene hydrogenation process in caprolactam production process | |
| CN103409159B (en) | Direct-current type short contact rotational flow reactor | |
| CN103788993A (en) | Catalytic cracking unit | |
| CN102559239A (en) | Cut-over ultrashort contact rotational flow reactor | |
| CN2848368Y (en) | Heavy oil feeding atomization nozzle | |
| CN1140607C (en) | apparatus for producing low carbon olefines by high-tmep. catalyzing contact cracking from heavy petroleum hydrocarbon | |
| CN110773085B (en) | Gas-liquid reactor | |
| CN2791050Y (en) | Fluidized catalytic-cracking lift pipe reactor | |
| CN108048126A (en) | A kind of circulating fluid bed reactor | |
| CN118028011B (en) | Catalytic cracking device for petrochemical production and application method | |
| CN203904271U (en) | Catalytic cracking reactor with short reaction time | |
| CN201106030Y (en) | Acetic acid and acetic anhydride carbonyl reaction kettle for gas liquid ejecting combined slurry bed |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |