CN115746899A - Reactor and separation system - Google Patents
Reactor and separation system Download PDFInfo
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- CN115746899A CN115746899A CN202111028540.7A CN202111028540A CN115746899A CN 115746899 A CN115746899 A CN 115746899A CN 202111028540 A CN202111028540 A CN 202111028540A CN 115746899 A CN115746899 A CN 115746899A
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- reactor
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- riser
- lifting pipe
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- 238000000926 separation method Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000003054 catalyst Substances 0.000 claims abstract description 23
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000004523 catalytic cracking Methods 0.000 abstract description 25
- 238000004939 coking Methods 0.000 abstract description 14
- 239000003921 oil Substances 0.000 description 30
- 239000011800 void material Substances 0.000 description 6
- 238000005336 cracking Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to a reactor and a separation system, wherein the reactor shell comprises an upper shell and a lower shell, an inner cover is arranged in the reactor shell, the first end of the inner cover of the reactor in the axis direction is closed and connected to a main cyclone separator, the second end is open and forms a first space together with the lower shell, and a second space is formed between the inner cover and the upper shell; the outer lifting pipe is provided with a material inlet and a material outlet and is arranged outside the reactor shell, and an outlet pipe of the outer lifting pipe sequentially penetrates through the reactor shell and the inner cover and extends into the first space; the inner lifting pipe is provided with a material inlet and a material outlet and is arranged in the first space, wherein the material outlets of the outer lifting pipe and the inner lifting pipe are respectively provided with a separator for separating reaction oil gas and catalyst flowing out of the outer lifting pipe and the inner lifting pipe. The reactor can effectively seal reaction oil gas generated in catalytic cracking or catalytic cracking reaction, and further can inhibit coking in the reactor shell.
Description
Technical Field
The present disclosure relates to the technical field of petroleum refining and coal-to-liquid, and in particular, to a reactor and separation system.
Background
In the catalytic cracking or catalytic cracking reaction, the retention time of the reaction oil gas in the reactor shell is too long, coking precursors and heavy components in the oil gas are accumulated to form coke which is attached to the reactor shell and internal components, so that the reactor is coked, the coking of the reactor often causes economic loss to the device, and the coking of the reactor is also a negative factor which influences the long-period safe operation of the heavy oil catalytic cracking and catalytic cracking device.
In the prior art, an inner riser or an outer riser is usually adopted to avoid coking of oil gas in a reactor shell, and the method is only suitable for a single riser reactor, and in some catalytic cracking or catalytic cracking devices adopting selective cracking, an inner riser and an outer riser are usually required to be arranged, and different feeding and operating conditions are respectively adopted in the two risers to achieve the reaction effect of optimal combination. The device adopting the inner and outer risers can not effectively seal the oil gas system due to the structure of the reactor, so the anti-coking technology of the reactor can not be adopted, the safe and stable operation period of the device is adversely affected, and the over-cracking is intensified due to the prolonged residence time of the reaction oil gas, so the dry gas yield is increased.
Disclosure of Invention
The purpose of this disclosure is to provide a reactor, this reactor can carry out effective closure to the reaction oil gas that produces in catalytic cracking or catalytic cracking reaction, and then can restrain the coking in the reactor casing.
To achieve the above object, the present disclosure provides a reactor comprising: the reactor comprises a reactor shell, wherein the reactor shell comprises an upper shell and a lower shell, an inner cover is arranged in the reactor shell, a reaction oil-gas outlet is formed in the upper shell, a main cyclone separator is arranged above the inner side of the upper shell, the reaction oil-gas outlet is connected to an oil-gas outlet of the main cyclone separator, a catalyst outlet is arranged below the lower shell, the inner cover is provided with a first end and a second end which are opposite to each other in the axis direction, the first end is arranged in a closed mode, the second end is arranged in an open mode, the first end is connected to the main cyclone separator, the second end and the lower shell form a first space together, and a second space is formed between the second end and the upper shell; the outer lifting pipe is provided with a material inlet and a material outlet and is arranged outside the reactor shell, and an outlet pipe of the outer lifting pipe sequentially penetrates through the reactor shell and the inner cover and extends into the first space; and the inner lifting pipe is provided with a material inlet and a material outlet and is arranged in the first space, wherein separators are arranged at the material outlets of the outer lifting pipe and the inner lifting pipe respectively and are used for separating reaction oil gas and a catalyst which flow out of the outer lifting pipe and the inner lifting pipe respectively.
Optionally, the inner cover is provided with a gap between the second end and the lower housing to allow the first space to communicate with the second space.
Optionally, the void is configured as an annular void disposed between the inner shroud and the lower housing.
Optionally, a coke-proof cover plate is arranged in the second space, and the coke-proof cover plate is arranged above the gap.
Optionally, the reactor comprises a coke-proof steam ring disposed above the second space for providing coke-proof steam.
Optionally, the separator of the outer riser and the separator of the inner riser are arranged offset in the first space.
Optionally, the inner shroud is sealingly connected to the primary cyclone at the first end by a draft tube.
Optionally, the primary cyclones are arranged in multiple groups, and inlets of the multiple groups of primary cyclones are connected to the flow guide pipe.
On the basis of the scheme, the separation system is provided with the reactor.
Through the technical scheme, in the reactor provided by the disclosure, the inner cover is arranged in the reactor shell, and the material outlets of the outer lifting pipe and the inner lifting pipe are arranged in the first space formed by the second end of the inner cover and the lower shell, so that reaction raw materials and catalysts respectively flow upwards through the material inlets of the outer lifting pipe and the inner lifting pipe and respectively enter the first space, wherein the separators at the material outlets of the outer lifting pipe and the inner lifting pipe can be respectively used for separating reaction oil gas and catalysts flowing out from the outer lifting pipe and the inner lifting pipe, the separated catalysts flow out from the catalyst outlet of the lower shell, the separated reaction oil gas can flow upwards from the first space and flow into the main cyclone separator at the inner side of the upper shell from the first end of the inner cover for secondary separation, and further the reaction oil gas after secondary separation can flow out from the reaction oil gas outlet of the upper shell through the oil gas outlet of the cyclone separator. Therefore, the reactor provided by the disclosure can effectively seal reaction oil gas generated in catalytic cracking or catalytic cracking reaction, and further can inhibit coking in the reactor shell.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure, but do not constitute a limitation of the disclosure. In the drawings:
FIG. 1 is a schematic diagram of a reactor provided in accordance with an embodiment of the present disclosure.
Description of the reference numerals
1-a reactor shell; 11-an upper shell; 12-a lower housing; 2-inner cover; 3-an outer riser; 31-an outlet pipe; 32-a cyclone separator; 4-an inner riser; 41-a cyclone separator; 5-a primary cyclone separator; 6-anti-coking steam ring; 7-a flow guide pipe; 8-reaction oil gas outlet; 9-a scorch-proof cover plate; 10-a first space; 20-a second space; 30-voids; 40-stripping section.
Detailed Description
The following detailed description of the embodiments of the disclosure refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, in the case where no description is made to the contrary, the use of the directional terms such as "upper" and "lower" in the case where no description is made to the contrary, generally means the upper and lower in the drawing plane of the corresponding fig. 1, and "inner" and "outer" mean the inner and outer with respect to the outline of the component itself; moreover, the use of the terms first, second, etc. are intended to distinguish one element from another, and are not necessarily order or importance. Moreover, in the following description, when referring to the figures, the same reference numbers in different figures represent the same or similar elements unless otherwise explained. The foregoing definitions are provided to illustrate and explain the present disclosure and should not be construed to limit the present disclosure.
According to an embodiment of the present disclosure, a reactor is provided, an example of which is shown in fig. 1. Wherein, referring to fig. 1, the reactor may comprise: the reactor comprises a reactor shell 1, wherein the reactor shell 1 comprises an upper shell 11 and a lower shell 12, an inner cover 2 is arranged in the reactor shell 1, a reaction oil-gas outlet 8 is formed in the upper shell 11, a main cyclone separator 5 is arranged above the inner side of the upper shell 11, the reaction oil-gas outlet 8 is connected to an oil-gas outlet of the main cyclone separator 5, a catalyst outlet is arranged below the lower shell 12, the inner cover 2 is provided with a first end and a second end which are opposite to each other in the axial direction, the first end is arranged in a closed mode, the second end is arranged in an open mode, the first end is connected to the main cyclone separator 5, the second end and the lower shell 12 jointly form a first space 10, and a second space 20 is formed between the second end and the upper shell 11; an outer riser 3, wherein the outer riser 3 is provided with a material inlet and a material outlet, the outer riser 3 is arranged outside the reactor shell 1, and an outlet pipe 31 of the outer riser 3 sequentially penetrates through the reactor shell 1 and the inner cover 2 and extends into the first space 10; and the inner riser 4 is provided with a material inlet and a material outlet and is arranged in the first space 10, wherein separators are respectively arranged at the material outlets of the outer riser 3 and the inner riser 4 so as to be respectively used for separating reaction oil gas and catalyst flowing out of the outer riser 3 and the inner riser 4.
Through the technical scheme, in the reactor provided by the disclosure, the inner cover 2 is arranged in the reactor shell 1, and the material outlets of the outer lift pipe 3 and the inner lift pipe 4 are both arranged in the first space 10 formed by the second end of the inner cover 2 and the lower shell 12, so that reaction raw materials and catalysts respectively flow upwards through the material inlets of the outer lift pipe 3 and the inner lift pipe 4 and respectively enter the first space 10, wherein the separators at the material outlets of the outer lift pipe 3 and the inner lift pipe 4 can be respectively used for separating reaction oil gas and catalysts flowing out from the outer lift pipe 3 and the inner lift pipe 4, the separated catalysts flow out from the catalyst outlet of the lower shell 12, the separated reaction oil gas can flow upwards from the first space 10 and flow into the main cyclone separator 5 at the inner side of the upper shell 11 from the first end of the inner cover 2, and are subjected to secondary separation, and further the reaction oil gas after secondary separation can flow out from the reaction oil gas outlet 8 of the upper shell 11 through the cyclone outlet of the inner cover 2, and the separation efficiency of the catalyst can be improved on the other hand, and the oil gas can be effectively subjected to cracking reaction in catalytic cracking reaction or the catalytic cracking reaction, and the catalytic cracking reaction of the catalytic cracking reaction, so that the catalytic cracking reaction can not occur in the catalytic cracking reaction of the catalytic cracking reaction shell 1. Therefore, the reactor provided by the disclosure can effectively seal reaction oil gas generated in catalytic cracking or catalytic cracking reaction, and further can inhibit coking in the reactor shell.
It should be noted that the arrangement of the outer riser 3 and the inner riser 4 allows the reaction raw material and the catalyst to enter the reactor at different feeding conditions and different operating conditions, so as to achieve the optimal combined reaction effect. Wherein, the feeding conditions and the operating conditions of the outer riser 3 and the inner riser 4 can be adaptively selected according to actual needs, for example, the outlet reaction temperature of the inner riser 4 is 450 to 650 ℃, the reaction pressure is 0.05 to 0.35MPa (gauge pressure), the outlet reaction temperature of the outer riser 3 is 480 to 700 ℃, the reaction pressure is 0.05 to 0.35MPa (gauge pressure), and the disclosure is not limited thereto.
In the embodiment provided by the present disclosure, referring to fig. 1, a gap 30 may be provided between the second end of the inner shroud 2 and the lower shell 12 to allow the first space 10 to communicate with the second space 20, and the gap 30 is configured to allow the catalyst separated from the primary cyclone 5 to enter the first space 10 from the second space 20 along the gap 30, and then enter the stripping section 40 of the reactor, and finally flow out from the catalyst outlet of the lower shell 12.
In the particular embodiment provided by the present disclosure, the void 30 may be configured in any suitable manner, alternatively, as shown with reference to FIG. 1, the void 30 may be configured as an annular void disposed between the inner shroud 2 and the lower housing 12 to avoid catalyst separated from the primary cyclone 5 from accumulating in the void 30. In other embodiments of the present disclosure, the gap 30 may be configured in other ways, and the present disclosure is not limited thereto.
It should be noted that, in order to avoid abrasion to the reactor during the flowing process of the catalyst, wear-resistant liners are laid on the inner wall and the outer wall of the inner riser 4, the inner wall and the outer wall of the outlet pipe 31 of the outer riser 3, the inner wall and the outer wall of the separators of the inner riser 4 and the outer riser 3, the inner wall of the draft tube 7 and the inner wall of the primary cyclone 5, wherein the wear-resistant liners can be configured in any suitable manner, and the disclosure is not limited in any way.
In the specific embodiment provided by the present disclosure, referring to fig. 1, a coke-proof cover plate 9 may be disposed in the second space 20, and the coke-proof cover plate 9 is disposed above the gap 30. The arrangement of the anti-coking cover plate 9 can inhibit reaction oil gas in the first space 10 from entering the second space 20 from the gap 30 and allow anti-coking steam described below to pass through the anti-coking cover plate 9, thereby further realizing effective sealing of the reaction oil gas generated in catalytic cracking or catalytic cracking reaction, and further effectively inhibiting coking of the reaction oil gas in the reactor shell 1.
In the specific embodiment provided by the present disclosure, referring to fig. 1, the reactor may include a coke-preventing steam ring 6, the coke-preventing steam ring 6 is disposed above the second space 20 to provide coke-preventing steam, and the coke-preventing steam provided by the coke-preventing steam ring 6 can inhibit reaction oil gas in the first space 10 from entering the second space 20 from the gap 30 on one hand, and can also enable the catalyst separated from the primary cyclone separator 5 and the reaction oil gas carried by the catalyst to enter the first space 10 from the coke-preventing cover plate 9 on the other hand, so as to realize effective sealing of the reaction oil gas generated in the catalytic cracking or catalytic cracking reaction.
In the embodiment provided by the present disclosure, referring to fig. 1, the separator of the outer riser 3 and the separator of the inner riser 4 may be disposed in a staggered manner in the first space 10, which facilitates the sufficient mixing of the reaction oil gas separated from the separators at the material outlets of the outer riser 3 and the inner riser 4. Wherein the separator of the outer riser 3 and the separator of the inner riser 4 may be configured in any suitable manner, alternatively, the separator of the outer riser 3 may be configured as a cyclone separator 32, and the cyclone separator 32 may be a set of cyclone separators or a plurality of sets of cyclone separators; the separator of the inner riser 4 may be configured as a cantilevered cyclone separator 41 or a baffle separator, wherein when the separator of the inner riser 4 is configured as a cantilevered cyclone separator 41, the cyclone separator 41 may be a single-arm separator or a multi-arm separator, for which the present disclosure is not limited thereto, and those skilled in the art can adaptively select the separator according to actual needs.
In the embodiment provided by the present disclosure, referring to fig. 1, the inner cover 2 is hermetically connected to the primary cyclone 5 at the first end through a draft tube 7, so that the reaction oil gas in the first space 10 flows into the primary cyclone 5 through the draft tube 7 for secondary separation.
In the specific embodiment provided by the present disclosure, the primary cyclones 5 may be arranged in any suitable manner, and alternatively, the primary cyclones 5 may be provided as a group, and the inlets of the group of primary cyclones 5 are connected to the draft tube 7. Alternatively, referring to fig. 1, the primary cyclones 5 can be arranged in multiple groups, and the inlets of the multiple groups of primary cyclones 5 are connected to the flow guiding pipe 7. That is, the draft tube 7 can distribute the reaction oil gas in the first space 10 to the plurality of sets of the primary cyclones 5 to perform the secondary separation. The primary cyclone separator 5 in each group may be a first-stage cyclone separator or a multi-stage cyclone separator, and the disclosure is not limited thereto, and the technique in the art can be adaptively selected according to actual needs.
On the basis of the scheme, the separation system is provided with the reactor.
The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details in the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (9)
1. A reactor, characterized in that it comprises:
the reactor comprises a reactor shell (1), wherein the reactor shell (1) comprises an upper shell (11) and a lower shell (12), an inner cover (2) is arranged in the reactor shell (1), a reaction oil-gas outlet (8) is formed in the upper shell (11), a main cyclone separator (5) is arranged above the inner side of the upper shell (11), the reaction oil-gas outlet (8) is connected to an oil-gas outlet of the main cyclone separator (5), a catalyst outlet is formed below the lower shell (12), the inner cover (2) is provided with a first end and a second end which are opposite to each other in the axis direction, the first end is arranged in a closed mode, the second end is arranged in an open mode, the first end is connected to the main cyclone separator (5), the second end and the lower shell (12) jointly form a first space (10), and a second space (20) is formed between the first end and the upper shell (11);
the outer lifting pipe (3) is provided with a material inlet and a material outlet, the outer lifting pipe (3) is arranged outside the reactor shell (1), and an outlet pipe (31) of the outer lifting pipe (3) sequentially penetrates through the reactor shell (1) and the inner cover (2) and extends into the first space (10); and
an inner riser (4), the inner riser (4) having a material inlet and a material outlet and being arranged in the first space (10),
separators are arranged at material outlets of the outer riser (3) and the inner riser (4) respectively and are used for separating reaction oil gas and catalyst flowing out of the outer riser (3) and the inner riser (4).
2. Reactor according to claim 1, characterized in that the inner mantle (2) is provided with a gap (30) between the second end and the lower shell (12) to allow the first space (10) to communicate with the second space (20).
3. Reactor according to claim 2, characterized in that the interspace (30) is configured as an annular interspace provided between the inner mantle (2) and the lower shell (12).
4. A reactor according to claim 2, characterized in that a coke-shield cover plate (9) is arranged in the second space (20), the coke-shield cover plate (9) being arranged above the interspace (30).
5. A reactor according to claim 4, characterized in that the reactor comprises a coke-proof steam ring (6), which coke-proof steam ring (6) is arranged above the second space (20) for providing coke-proof steam.
6. Reactor according to claim 1, characterized in that the separator of the outer riser (3) and the separator of the inner riser (4) are arranged offset in the first space (10).
7. Reactor according to claim 1, characterized in that the inner hood (2) is sealingly connected at the first end to the primary cyclone (5) by means of a draft tube (7).
8. A reactor according to claim 6, characterized in that the primary cyclones (5) are arranged in groups, the inlets of the groups of primary cyclones (5) being connected to the flow duct (7).
9. A separation system, characterized in that it is provided with a reactor according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111028540.7A CN115746899A (en) | 2021-09-02 | 2021-09-02 | Reactor and separation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111028540.7A CN115746899A (en) | 2021-09-02 | 2021-09-02 | Reactor and separation system |
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| Publication Number | Publication Date |
|---|---|
| CN115746899A true CN115746899A (en) | 2023-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111028540.7A Pending CN115746899A (en) | 2021-09-02 | 2021-09-02 | Reactor and separation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201684585U (en) * | 2010-05-14 | 2010-12-29 | 中国石油化工集团公司 | Catalytic cracking multi-riser reactor with bed reactor |
| CN102019156A (en) * | 2009-09-10 | 2011-04-20 | 中国石油化工集团公司 | Catalytic cracking reactor and use method thereof |
| CN102071054A (en) * | 2009-10-30 | 2011-05-25 | 中国石油化工股份有限公司 | Catalytic cracking method |
| CN102240528A (en) * | 2010-05-14 | 2011-11-16 | 中国石油化工集团公司 | Closed type rough cyclone quick separation system carrying multiple-riser reactor for catalytic cracking process and catalytic cracking method thereof |
| CN102899078A (en) * | 2011-07-29 | 2013-01-30 | 中国石油化工股份有限公司 | Catalytic cracking method for producing propylene |
| CN203437111U (en) * | 2013-06-17 | 2014-02-19 | 中国石油天然气股份有限公司 | Anti-coking cyclone separation device of multi-section lifting pipe reactor |
| CN204111694U (en) * | 2014-09-04 | 2015-01-21 | 中国石化工程建设有限公司 | A kind of totally-enclosed Vortex Quick Separation System suppressing Coking In The Settler of Fcc Unit |
| CN110857400A (en) * | 2018-08-24 | 2020-03-03 | 中国石油化工股份有限公司 | Method and system for processing coker gasoline by using double lifting pipes |
-
2021
- 2021-09-02 CN CN202111028540.7A patent/CN115746899A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019156A (en) * | 2009-09-10 | 2011-04-20 | 中国石油化工集团公司 | Catalytic cracking reactor and use method thereof |
| CN102071054A (en) * | 2009-10-30 | 2011-05-25 | 中国石油化工股份有限公司 | Catalytic cracking method |
| CN201684585U (en) * | 2010-05-14 | 2010-12-29 | 中国石油化工集团公司 | Catalytic cracking multi-riser reactor with bed reactor |
| CN102240528A (en) * | 2010-05-14 | 2011-11-16 | 中国石油化工集团公司 | Closed type rough cyclone quick separation system carrying multiple-riser reactor for catalytic cracking process and catalytic cracking method thereof |
| CN102899078A (en) * | 2011-07-29 | 2013-01-30 | 中国石油化工股份有限公司 | Catalytic cracking method for producing propylene |
| CN203437111U (en) * | 2013-06-17 | 2014-02-19 | 中国石油天然气股份有限公司 | Anti-coking cyclone separation device of multi-section lifting pipe reactor |
| CN204111694U (en) * | 2014-09-04 | 2015-01-21 | 中国石化工程建设有限公司 | A kind of totally-enclosed Vortex Quick Separation System suppressing Coking In The Settler of Fcc Unit |
| CN110857400A (en) * | 2018-08-24 | 2020-03-03 | 中国石油化工股份有限公司 | Method and system for processing coker gasoline by using double lifting pipes |
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