CN115305114A - Double-riser or multi-riser settler - Google Patents
Double-riser or multi-riser settler Download PDFInfo
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- CN115305114A CN115305114A CN202110496012.8A CN202110496012A CN115305114A CN 115305114 A CN115305114 A CN 115305114A CN 202110496012 A CN202110496012 A CN 202110496012A CN 115305114 A CN115305114 A CN 115305114A
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- riser
- settler
- pipe
- lifting pipe
- outlet
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G55/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process
- C10G55/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process plural serial stages only
- C10G55/06—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process plural serial stages only including at least one catalytic cracking step
Abstract
The invention provides a double-riser or multi-riser settler, which mainly comprises a first riser, a settler shell, a second riser shell, a coarse cyclone, a single-stage cyclone, a first gas collection chamber, a second riser oil-gas pipeline, a settler outlet oil-gas pipeline, a stripping section, a spent inclined pipe, a balance pipe and the like; the first riser is an inner riser, the outlet of the first riser is connected with a coarse cyclone, the coarse cyclone is connected with a first gas collection chamber through a riser, the first gas collection chamber is connected with the inlet of the single-stage cyclone separator, the riser of the single-stage cyclone separator is connected with a second gas collection chamber, and an oil gas pipeline at the outlet of the settler is led out from the second gas collection chamber; the riser 1 is an inner riser, a catalyst fast-separating facility at the outlet of the outer riser is not required to be arranged in the settler, the second gas collecting chamber can be selectively arranged outside the settler, the size of the settler can be designed to be minimized, and the outlet of the outer riser adopts a coarse cyclone or a cyclone head, so that flexible and compact arrangement can be realized, and the space is saved.
Description
Technical Field
The invention belongs to the technical field of gas-solid separation at an outlet of a lifting pipe, and particularly relates to a settler with double lifting pipes or multiple lifting pipes.
Background
Catalytic crackers and fluid bed hydrocarbon crackers typically employ riser reactors. On one hand, when the raw materials of the device are fed in various ways, different feeds often require different catalyst-oil ratios and reaction conditions, which requires the arrangement of double risers or multiple risers; on the other hand, in order to improve the reaction conversion rate, the device is often provided with recycle, the recycle material flow can be material flow in the device or material flow returned after the material flow in the device is sent to other devices for processing treatment, the recycle material flow of the catalytic device can be recycle oil, diesel oil, gasoline, light naphtha, liquefied gas and the like, and the reflux material flow of the fluidized bed hydrocarbon cracking device can be C3-C8 and the like.
CN201810975592.7 discloses a double riser structure, two risers are respectively processed with desorption oil and adsorption oil, share the same settler, and the reacted oil gas is converged and enters a downstream unit; CN201280036679.9 also proposes a double riser structure, in which the raw material of the device is subjected to catalytic cracking reaction in a first riser, light hydrocarbons separated from a second riser are recycled, and the two risers are both external risers and share the same settler. CN201810500238.9 proposes a coking-preventing double-gas-collecting-chamber settler structure, and double lift pipes are also applicable to the structure, and the tail end structure of each lift pipe is arranged in the same settler. The common settler needs to arrange riser outlet fast-dividing facilities in the same settler, and the device is limited when three or more risers are arranged; for the transformation of an old device, when a scheme of adding a riser is adopted, equipment is used as much as possible, and the conventional settler cannot meet the requirement of sharing a plurality of risers. In addition, the common settler is also limited by the planar arrangement.
CN200510017751.5 and CN201410527719.0 respectively provide a catalytic cracking device and a method for simultaneously arranging a heavy oil riser and a light oil riser, can process multiple heavy oil and light hydrocarbon feeding, realize shorter oil contact time, respectively arrange independent settlers on the heavy oil riser and the light oil riser in the patent, have large size of the settlers, have high floor occupation requirements of a plurality of settlers, and have less investment; for old device transformation, when a scheme of newly adding a riser is adopted, a new settler is set and limited by plane arrangement, so that the investment is high.
Disclosure of Invention
The invention provides a settler with double risers or multiple risers, which aims to solve the problems of large size, high occupied area requirement and large investment of a settler shared by multiple risers and a separately arranged settler.
The invention provides a double-riser or multi-riser settler, which mainly comprises a first riser, a settler shell, a second riser shell, a steam stripping section, a second riser steam stripping section, a coarse cyclone, a second riser outlet quick separation facility, a single-stage cyclone separator, a first gas collection chamber, a second riser oil-gas pipeline expansion joint, a settler outlet oil-gas pipeline, a to-be-generated inclined pipe, a second riser to-be-generated inclined pipe, a balance pipe and a to-be-generated sliding valve; the upper part of the first riser, the coarse cyclone, the single-stage cyclone separator, the first gas collection chamber, the stripping section and the balance pipe are positioned in a settler shell; the first lifting pipe is an inner lifting pipe, the outlet of the first lifting pipe is connected with a coarse cyclone, the coarse cyclone is connected with a first gas collection chamber through a lifting pipe, the first gas collection chamber is connected with the inlet of the single-stage cyclone separator, the lifting pipe of the single-stage cyclone separator is connected with a second gas collection chamber, and an oil-gas pipeline at the outlet of the settler is led out from the second gas collection chamber; the steam stripping section is positioned at the lower part of the settler, the inclined tube to be generated is led out from the steam stripping section, and a balance tube is arranged between the settler and the first gas collection chamber; the second riser is an outer riser, the upper part of the second riser and the quick separation facility are positioned in a second riser shell, an outlet of the second riser is connected with the quick separation facility at the outlet of the second riser, and the second riser shell is connected with the first gas collection chamber through a second riser oil-gas pipeline;
as an improved scheme, the height of the tail end of the balance pipe is not lower than that of the tail end of the coarse rotary dipleg.
As a further improved scheme, the stripping section of the second riser is positioned at the lower part of the shell of the second riser, and the inclined tube to be generated of the second riser is led out from the lower part of the stripping section.
As a further improvement, the second riser outlet fast-separation facility adopts a cyclone separator or a cyclone head; the second plenum is disposed within the settler shell, or outside the settler shell.
As a further improved scheme, a spent slide valve is arranged on a second riser spent inclined pipe, the second riser spent inclined pipe is connected to a steam stripping section of a settler, or the second riser spent inclined pipe is connected to a regenerator.
As a further improvement, one or more sets of single-stage cyclone separators can be provided.
As a further improved scheme, the double-riser or multi-riser settler is suitable for a multi-riser scheme, the multi-riser is an outer riser, a cyclone separator or a cyclone head is arranged at the outlet of the outer riser, the upper part of the outer riser is positioned in an outer riser shell, and the outer riser shell is connected with a first gas collection chamber through an oil-gas pipeline; the lower part of the outer shell of the outer lifting pipe is provided with a stripping section, the lower part of the stripping section is provided with a to-be-generated inclined pipe, and the to-be-generated inclined pipe is provided with a to-be-generated sliding valve; the inclined tube to be generated is connected to the stripping section of the settler or connected to the regenerator.
The working principle of the double-riser or multi-riser settler provided by the invention is as follows:
the oil gas in the first lifting pipe carries a large amount of catalyst to enter a coarse cyclone from the outlet of the first lifting pipe, the coarse cyclone quickly separates the oil gas from the catalyst, most of the catalyst is discharged to a stripping section from a coarse cyclone dipleg, and the oil gas carries a small amount of catalyst to enter a first gas collection chamber of a settler; the oil gas in the second riser carries a large amount of catalyst to enter a fast separation facility from the outlet of the second riser, the oil gas and the catalyst are separated quickly, most of the catalyst is discharged to a stripping section of the riser, and the oil gas carries a small amount of catalyst to enter a first gas collection chamber of a settler through an oil gas pipeline of the riser; the oil gas of all the lift pipes is buffered in the first gas collecting chamber and then enters a single-stage cyclone separator, the single-stage cyclone separator is used for carrying out secondary separation on the catalyst and the oil gas, the oil gas enters the second gas collecting chamber, and the catalyst is discharged to a stripping section through a dipleg of the single-stage cyclone separator. The catalyst in the steam stripping section of each riser is subjected to steam stripping by using steam, and then is conveyed to the steam stripping section of the settler through the inclined tube to be generated of the riser, or is directly conveyed to the regenerator through the inclined tube to be generated of the riser; the steam stripping section of the settler collects spent catalyst, the spent catalyst is stripped by steam in the steam stripping section and then is sent to the regenerator through a spent inclined tube, and the stripped steam and anti-coking steam enter the first gas collection chamber through the balance tube; and after being buffered by the second gas collecting chamber, the reaction oil gas is conveyed out to a downstream separation unit through an oil gas pipeline at the outlet of the settler.
The invention has the following beneficial effects:
1) The first riser is an inner riser, the outer riser fast-separating facility does not need to be arranged in the settler, the second gas collecting chamber can also be optionally arranged outside the settler, the size of the settler can be minimized, and the occupied area and the investment are saved.
2) The outer riser fast-separating facility adopts a coarse spinning or swirling head, the diameter of the outer shell of the outer riser can be minimized, the outer riser is flexibly arranged, compact arrangement can be realized, and space is saved.
3) The invention can be flexibly applied to newly built devices, and provides a flexible alternative for device transformation.
Drawings
FIG. 1 is a schematic diagram of a dual riser or multi-riser settler structure of the present invention;
FIG. 2 is a schematic view of a dual riser or multi-riser settler structure of the present invention;
FIG. 3 is a schematic view of a dual riser or multi-riser settler structure of the present invention;
FIG. 4 is a fourth schematic view of a dual riser or multi-riser settler structure of the present invention;
FIG. 5 isbase:Sub>A view A-A of the second riser quick separation facility;
FIG. 6 isbase:Sub>A second riser fast separation facility configuration A-A.
In the figure: 1-a first riser, 2-a settler shell, 3-a second riser, 4-a second riser shell, 5-a stripping section, 6-a second riser stripping section, 7-a crude cyclone, 8-a second riser outlet fast-splitting facility, 9-a single-stage cyclone, 10-a first gas collection chamber, 11-a second gas collection chamber, 12-a second riser oil-gas pipeline, 13-a second riser oil-gas pipeline expansion joint, 14-a settler outlet oil-gas pipeline, 15-a to-be-generated inclined tube, 16-a second riser to-be-generated inclined tube, 17-a balance tube, 18-a to-be-generated slide valve, 19-a third riser, 20-a third riser shell, 21-a third riser stripping section, 22-a third riser outlet fast-splitting facility, 23-a third riser oil-gas pipeline, 24-a third riser oil-gas pipeline expansion joint and 25-a third riser to-be-generated inclined tube.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a double-riser or multi-riser settler structure of the invention, which mainly comprises a first riser 1, a settler shell 2, a second riser 3, a second riser shell 4, a stripping section 5, a second riser stripping section 6, a coarse cyclone 7, a second riser outlet quick-separating facility 8, a single-stage cyclone 9, a first gas collection chamber 10, a second gas collection chamber 11, a second riser oil-gas pipeline 12, a second riser oil-gas pipeline expansion joint 13, a settler outlet oil-gas pipeline 14, a spent inclined pipe 15, a second riser spent inclined pipe 16, a balance pipe 17 and a spent slide valve 18. The first lifting pipe 1 is an inner lifting pipe, the outlet of the first lifting pipe is connected with a coarse cyclone 7, a lifting pipe of the coarse cyclone 7 is connected with a first gas collecting chamber 10, the first gas collecting chamber 10 is connected with the inlet of a single-stage cyclone 9, the lifting pipe of the single-stage cyclone 9 is connected with a second gas collecting chamber 11, and an oil-gas pipeline 14 at the outlet of a settler is led out from the second gas collecting chamber 11; the steam stripping section 5 is positioned at the lower part of the settler shell, the lower part of the steam stripping section 5 is provided with a to-be-grown inclined pipe 15, and a balance pipe 17 is communicated with a first gas collection chamber 11 of the settler; the upper part of the first riser 1, the coarse cyclone 7, the single-stage cyclone 9, the first gas collecting chamber 10, the stripping section 5 and the balance pipe 17 are positioned in a settler shell; the second riser is an outer riser, the outlet of the second riser is connected with a second riser outlet fast-dividing facility 8, and the upper part of the second riser 3 and the second riser outlet fast-dividing facility 8 are positioned in the second riser shell 4; the second riser housing 4 is connected with the first gas collecting chamber 10 through a second riser oil-gas pipeline 12; the second riser stripping section 6 is positioned at the lower part of the second riser shell, and a second riser to-be-generated inclined pipe 16 is led out from the lower part of the second riser stripping section 6.
The outlet fast-dividing facility 8 of the second riser adopts a rotational flow head for fast dividing; the second gas collecting chamber is an inner gas collecting chamber and is arranged in the settler shell; the height of the tail end of the balance pipe is not lower than that of the tail end of the coarse spinning leg; a spent slide valve 18 is arranged on the second lifting pipe spent inclined pipe, and the second lifting pipe spent inclined pipe is connected to the steam stripping section 5; the single-stage cyclone separator can be provided with one or more groups.
Fig. 2 is a schematic diagram of a dual-riser or multi-riser settler structure of the present invention, which is different from fig. 1 in that: the second gas collecting chamber 11 is an external gas collecting chamber and is arranged outside the settler shell; a plurality of groups of single-stage cyclone separators 9 are arranged.
Fig. 3 is a schematic diagram of a double-riser or multi-riser settler structure of the present invention, and the difference from fig. 1 is characterized in that: the second riser outlet fast-separating facility 8 adopts a cyclone separator, and a second riser to-be-regenerated inclined pipe 16 is directly connected to the regenerator.
Fig. 4 is a schematic diagram of a structure of a double-riser or multi-riser settler of the present invention, and the difference from fig. 1 is that a third riser 19 is provided, a cyclone separator is used as a third riser outlet fast separation facility 22, and a third riser inclined pipe to be generated 25 is directly connected to a regenerator; the second gas collection chamber 11 is an external gas collection chamber and is arranged outside the settler shell.
The oil gas in the first lifting pipe carries a large amount of catalyst to enter a coarse cyclone from the outlet of the first lifting pipe, the coarse cyclone quickly separates the oil gas from the catalyst, most of the catalyst is discharged to a stripping section from a coarse cyclone dipleg, and the oil gas carries a small amount of catalyst to enter a first gas collection chamber of a settler; the oil gas in the second riser pipe carries a large amount of catalyst to enter a fast separation facility from the outlet of the second riser pipe, the oil gas and the catalyst are separated quickly, most of the catalyst is discharged to a stripping section of the second riser pipe, and the oil gas carries a small amount of catalyst to enter a first gas collection chamber of a settler through an oil gas pipeline of the riser pipe; the oil gas of all the lift pipes enters a single-stage cyclone after being buffered in a first gas collecting chamber, the single-stage cyclone separates the catalyst and the oil gas for the second time, the oil gas enters a second gas collecting chamber, the catalyst is discharged to a steam stripping section through a single-stage dipleg, the catalyst in the steam stripping section is subjected to steam stripping by using steam and then is sent to the steam stripping section of a settler through a lift pipe to-be-grown inclined pipe, or is directly sent to a regenerator through a second lift pipe to-be-grown inclined pipe and a third lift pipe to-be-grown inclined pipe; the precipitator steam stripping section collects spent catalyst, the spent catalyst is steam stripped in the steam stripping section by steam, then the spent catalyst is conveyed to the regenerator through a spent inclined tube, and steam stripping steam and anti-coking steam enter the first gas collecting chamber through a balance tube; and after being buffered by the second gas collection chamber, the reaction oil gas is conveyed out to a downstream separation unit through an oil gas pipeline at the outlet of the settler.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof in any way. Variations or modifications which may be made by one skilled in the art without departing from the scope of the invention as defined by the claims above should be considered as equivalent examples of the equivalent variations. Any equivalent changes made to the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention, unless departing from the content of the technical solution of the present invention.
Claims (7)
1. A double-riser or multi-riser settler, characterized in that: the settler mainly comprises a first lifting pipe, a settler shell, a second lifting pipe shell, a steam stripping section, a second lifting pipe steam stripping section, a coarse cyclone, a second lifting pipe outlet fast separation facility, a single-stage cyclone separator, a first gas collection chamber, a second lifting pipe oil-gas pipeline expansion joint, a settler outlet oil-gas pipeline, a to-be-generated inclined pipe, a second lifting pipe to-be-generated inclined pipe, a balance pipe and a to-be-generated sliding valve; the upper part of the first lifting pipe, the coarse cyclone, the single-stage cyclone separator, the first gas collecting chamber, the steam stripping section and the balance pipe are positioned in the settler shell; the first lifting pipe is an inner lifting pipe, the outlet of the first lifting pipe is connected with a coarse cyclone, the coarse cyclone is connected with a first gas collection chamber through a lifting pipe, the first gas collection chamber is connected with the inlet of the single-stage cyclone separator, the lifting pipe of the single-stage cyclone separator is connected with a second gas collection chamber, and an oil-gas pipeline at the outlet of the settler is led out from the second gas collection chamber; the steam stripping section is positioned at the lower part of the settler, the inclined tube to be generated is led out from the steam stripping section, and a balance tube is arranged between the settler and the first gas collecting chamber; the second riser is an outer riser, the upper part of the second riser and the quick separation facility are positioned in a second riser shell, an outlet is connected with the quick separation facility at the outlet of the second riser, and the second riser shell is connected with the first gas collection chamber through an oil-gas pipeline of the second riser.
2. The dual-riser or multi-riser settler of claim 1, wherein: the height of the tail end of the balance pipe is not lower than that of the tail end of the coarse rotary dipleg.
3. The dual-riser or multi-riser settler of claim 1, wherein: the second riser steam stripping section is positioned at the lower part of the second riser shell, and the second riser inclined tube to be generated is led out from the lower part of the steam stripping section.
4. The dual-riser or multi-riser settler of claim 1, wherein: the second riser outlet fast-separation facility adopts a cyclone separator or a cyclone head; the second plenum is disposed within the settler housing, or outside the settler housing.
5. The dual-riser or multi-riser settler of claim 1, wherein: the single-stage cyclone separator can be provided with one or more groups.
6. The dual-riser or multi-riser settler of claim 1, wherein: and the second riser to-be-generated inclined pipe is provided with a to-be-generated slide valve and is connected to the steam stripping section of the settler or the regenerator.
7. The dual riser or multi-riser settler according to any one of claims 1 to 6, characterized in that: the lifting pipe also comprises a third lifting pipe or a plurality of outer lifting pipes, the outlet of the outer lifting pipe is provided with a cyclone separator or a cyclone head for fast separation, the upper part of the outer lifting pipe is positioned in an outer lifting pipe shell, and the outer lifting pipe shell is connected with the first gas collecting chamber through an oil-gas pipeline; the lower part of the outer shell of the outer lifting pipe is provided with a steam stripping section, the lower part of the steam stripping section is provided with a to-be-generated inclined pipe, and the to-be-generated inclined pipe is provided with a to-be-generated sliding valve; the inclined tube to be generated is connected to the stripping section of the settler or connected to the regenerator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110496012.8A CN115305114A (en) | 2021-05-07 | 2021-05-07 | Double-riser or multi-riser settler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110496012.8A CN115305114A (en) | 2021-05-07 | 2021-05-07 | Double-riser or multi-riser settler |
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| CN115305114A true CN115305114A (en) | 2022-11-08 |
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| CN202110496012.8A Pending CN115305114A (en) | 2021-05-07 | 2021-05-07 | Double-riser or multi-riser settler |
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| US20030124034A1 (en) * | 2001-11-29 | 2003-07-03 | China Petroleum & Chemical Corporation | Catalytic cracking reaction-regeneration system |
| CN1490383A (en) * | 2003-03-18 | 2004-04-21 | 上海鲁齐信息科技有限公司 | Catfoming process and apparatus for producing high-quality gasoline and increasing light products and propylene |
| CN2716269Y (en) * | 2004-07-09 | 2005-08-10 | 张韩 | Coking resistant device for rapidly discharging oil gas for reaction settler |
| CN201684586U (en) * | 2010-05-14 | 2010-12-29 | 中国石油化工集团公司 | Catalytic cracking multi-riser reactor with rough cyclone separator in direct connection |
| US20130292298A1 (en) * | 2010-11-11 | 2013-11-07 | Baozhen Shi | Catalytic Cracking Method and Apparatus |
| CN208878082U (en) * | 2018-05-23 | 2019-05-21 | 中石化广州工程有限公司 | A kind of double collection chamber anti-coking settlers |
| CN112680247A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Catalytic conversion method and device for increasing yield of low-carbon olefins |
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2021
- 2021-05-07 CN CN202110496012.8A patent/CN115305114A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030124034A1 (en) * | 2001-11-29 | 2003-07-03 | China Petroleum & Chemical Corporation | Catalytic cracking reaction-regeneration system |
| CN1490383A (en) * | 2003-03-18 | 2004-04-21 | 上海鲁齐信息科技有限公司 | Catfoming process and apparatus for producing high-quality gasoline and increasing light products and propylene |
| CN2716269Y (en) * | 2004-07-09 | 2005-08-10 | 张韩 | Coking resistant device for rapidly discharging oil gas for reaction settler |
| CN201684586U (en) * | 2010-05-14 | 2010-12-29 | 中国石油化工集团公司 | Catalytic cracking multi-riser reactor with rough cyclone separator in direct connection |
| US20130292298A1 (en) * | 2010-11-11 | 2013-11-07 | Baozhen Shi | Catalytic Cracking Method and Apparatus |
| CN208878082U (en) * | 2018-05-23 | 2019-05-21 | 中石化广州工程有限公司 | A kind of double collection chamber anti-coking settlers |
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