CN104275037A - Coaxial type anti-coking gas-solid separation method and equipment - Google Patents
Coaxial type anti-coking gas-solid separation method and equipment Download PDFInfo
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- CN104275037A CN104275037A CN201310288817.9A CN201310288817A CN104275037A CN 104275037 A CN104275037 A CN 104275037A CN 201310288817 A CN201310288817 A CN 201310288817A CN 104275037 A CN104275037 A CN 104275037A
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- cyclone cylinder
- catalyst
- riser
- cylinder
- settler
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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
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G11/14—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts
- C10G11/18—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts according to the "fluidised-bed" technique
- C10G11/182—Regeneration
Abstract
The invention relates to a coaxial type anti-coking gas-solid separation method and belongs to the technical field of petrochemical engineering and fluidization. The method is used for solving the problems of coaxial type devices that settlers undergo coking and excessive thermal cracking. The method comprises the processes of rapid oil vapor and catalyst separation, top cyclone separator second-stage separation, dipleg flutter valve discharge and oil vapor lead-out and is characterized by adopting closed rapid cyclone separation, arranging catalyst diversion facilities and closed connecting facilities, enabling the catalyst diversion facilities and the closed connecting facilities to be connected with the closed rapid cyclone separation and the top cyclone separator second-stage separation, so as to form a closed separation system, and closely guiding a catalyst, oil vapor and anti-coking steam, which are discharged from flutter valves, to the closed separation system. According to the method disclosed by the invention, only steam exists in a coaxial type settler without oil vapor and a catalyst, so that cleanup is realized, the problem of coking of the settler is thoroughly solved, the reaction of excessive thermal cracking of the oil vapor can be reduced, the yield of dry gas is lowered, and the yield of products is increased. The invention further provides a rapid cyclone separator, connecting tubes and catalyst diversion equipment, which are used for implementing the method disclosed by the invention. The method and equipment are applied to devices for catalytic cracking, catalytic pyrolysis and the like of heavy oil.
Description
Technical field
The invention belongs to petrochemical industry, fluidization technology field, particularly a kind of coaxial-type anti-coking gas-solid separating method and equipment.
Background technology
Refinery catalytic cracking unit's riser reactor outlet is all provided with fast gas-solid separator, for realizing oil gas and catalyst quick separating, stopping cracking reaction.Have umbrella crown in early days, fall L, the structural shape such as T-shaped, separative efficiency is generally 70% ~ 80%, and the oil gas after separation rises at a slow speed in the settler that diameter is larger, then enters settler top cyclone separator (being called for short top to revolve).At 20 ~ 50 seconds, under 500 DEG C of high temperature, still there is the reactions such as excessive heat cracking, condensation, affect yield of light oil, when processing heavy oil even in settler coking in this part oil gas in the settler time of staying.Some device riser reactor outlets arrange 1 ~ 4 primary cyclone (be called for short and slightly revolve), efficiency can reach more than 95%, thick spin material leg discharges catalyst under positive differential pressure condition, discharge 15% ~ 30% oil gas simultaneously, this part oil gas rises at a slow speed the top time of staying at 30 ~ 90 seconds in settler bottom, under 500 DEG C of high temperature, there is the reactions such as obvious excessive heat cracking, condensation, affect yield of light oil, even in settler coking during processing heavy oil.Some devices extend up near the screw-in mouth of top by slightly revolving riser, this scheme oil gas main flow time of staying significantly shortens, but a small amount of oil gas that thick spin material leg is discharged is the settler time of staying longer (reaching 100 seconds), the trend that settler has coking more serious.
For reducing oil gas in the settler time of staying, patent ZL200420037425.1 leg outlet adopts and slightly revolves fast point, airtight connection is revolved with top by slightly revolving, oil gas conduit is set population is revolved on the top that the oil gas (thick spin material leg discharges oil gas, stripping gas, anti-scorch steam gas) of settler bottom is guided to settler top, reduce the oil gas time of staying.This scheme can alleviate excessive heat cracking and coking to a certain extent, but thick spin material leg is still positive differential pressure discharge, still have oil gas to discharge from dipleg, coking chance is arranged at settler bottom, and the oil gas speed of thick spin material leg discharge is higher in addition, to settler lower catalytic agent disturbance, this region density of catalyst is increased, drawing oil gas in this region can make top screw in the increase of mouth density of catalyst, and cause catalyst taking-out amount to increase, the improper catalyst that easily causes of program design runs damage in a large number in addition.
Patent ZL01228805.5 develops the open direct multi-arm cyclone separation process of band pre-stripping segment.Leg outlet connects multi-arm cyclone separator, its arranged outside seal closure; Seal closure bottom arranges several layers of pre-stripping baffles, and seal closure upper end riser screws in mouth open type with top and is flexible coupling.This technology is applied to riser catalytic unit in block form, and seal closure circulation area is 20% ~ 30% of settler circulation area, and the time of staying of oil gas in seal closure significantly shortens.A small amount of oil gas that program flutter valve is discharged still rises to top at a slow speed from settler bottom, enter top revolve at the open type on the settler top place that is flexible coupling, this a small amount of oil gas, at the settler time of staying very long (> 100 seconds), has the chance of coking in settler.
Summary of the invention
The object of this invention is to provide a kind of coaxial-type anti-coking gas-solid separating method, solve oil gas in settler slow flow, overstand and coking, and avoid the cracking of oil gas excessive heat.
The present invention solves the method that its technical problem adopts: comprise oil gas and catalyst quick separating, push up and revolve the second-order separation, dipleg flutter valve discharge and oil gas and derive process, it is characterized in that: adopt airtight cyclone cylinder quick separating, and arrange catalyst parallel works; Catalyst parallel works and airtight cyclone cylinder quick separating, push up and revolve the second-order separation and be interconnected to form an airtight piece-rate system.
Realize an equipment for described inventive method, comprise the settler of coaxial structure, stripping section, riser, and cyclone cylinder quick disconnector, connecting cylinder, catalyst parallel works, airtight tube connector, top revolve, dipleg, flutter valve, steam loop.
Further, cyclone cylinder number of units 1 ~ 4, every platform cyclone cylinder has 1 ~ 2 oil and gas import, and cyclone cylinder air inlet runner is tangential straight structure or snail shell coiling structure; Cyclone cylinder top is closed structure, and top center is provided with blast pipe; Along concordant with cyclone cylinder top board under blast pipe, or stretch into cyclone cylinder inside, stretching into part is straight tube or cone-shaped tube.
Further, connecting cylinder is circular cylinder or pants shape cylinder or special shape tube, and upper end is flexible coupling with cyclone cylinder bottom or leads and is connected, and lower end is connected with settler bottom shell or is connected with stripping section.
Further, catalyst parallel works is passage, cross section is geometric form or combination shape or gradual change shape or abnormity, facade is straight shape or rolls over shape or abnormity, it is identical or not identical that number of units is revolved on number of channels and top, passage lower end or side be connected barrel and connect or reach in connecting cylinder, upper end is connected with flutter valve or is wrapped up or portion envelops by flutter valve.
Further, pushing up spin material leg is vertical or broken pipe structure.
Further, airtight tube connector connects cyclone cylinder and top is revolved, and airtight tube connector standpipe section has compensator; Each cyclone cylinder blast pipe imports 1 concetrated pipe and revolves with each top and be connected, or every platform cyclone cylinder blast pipe revolves with 1 ~ 3 top respectively and is connected.
Further, settler top, bottom, connecting cylinder inside arrange steam loop or do not arrange.
Further, riser is the main riser of feedstock oil, or recycle oil riser or gasoline rising pipe or subsidiary riser, or itself and the main riser of feedstock oil merge after riser, or each riser is connected with cyclone cylinder quick disconnector.
Innovative point of the present invention and good effect:
Innovative point of the present invention is: adopt airtight cyclone cylinder quick separating, devise catalyst parallel works, the airtight connection facility of connecting cylinder, itself and airtight cyclone cylinder quick separating, push up and revolve the second-order separation and be interconnected to form an airtight piece-rate system, catalyst, oil gas and anti-scorch steam that top spin material leg flutter valve is discharged are guided in cyclone cylinder quick disconnector, settler is full of steam, does not have oil gas and catalyst, achieves and cleans.
Good effect of the present invention is: 1, thoroughly solve settler coking problem, can implement device long-term operation.2, airtight cyclone cylinder gas-solid disngaging efficiency reaches more than 98%, and the oil gas time of staying is less than 5 seconds, reduces the cracking reaction of oil gas excessive heat, reduces dry gas yied, improve product yield.
Accompanying drawing explanation
Fig. 1 is a kind of coaxial-type anti-coking gas-solid separating method and equipment schematic diagram.
1-outlet, 2-revolves blast pipe in top, and 3-pushes up precession tracheae, 4-revolves on top, 5-cyclone cylinder blast pipe, 6-cyclone cylinder, 7-dipleg, 8-flutter valve, 9-catalyst mozzle, 10-stripping section, 11-riser, 12-collection chamber, the anti-scorch steam loop of 13-, 14-compensator, 15-settler, 16-connecting cylinder, 17-regenerator.
Fig. 2 is another kind of coaxial-type anti-coking gas-solid separating method and equipment schematic diagram.
1-outlet, 2-revolves blast pipe in top, and 3-pushes up precession tracheae, 4-revolves on top, 5-cyclone cylinder blast pipe, 6-cyclone cylinder, 7-dipleg, 8-flutter valve, 9-catalyst mozzle, 10-stripping section, 11-riser, 12-collection chamber, the anti-scorch steam loop of 13-, 14-compensator, 15-settler, 16-connecting cylinder, 17-regenerator.
Fig. 3 is another kind of coaxial-type anti-coking gas-solid separating method and equipment schematic diagram.
1-outlet, 2-revolves blast pipe in top, and 3-pushes up precession tracheae, 4-revolves on top, 5-cyclone cylinder blast pipe, 6-cyclone cylinder, 7-dipleg, 8-flutter valve, 9-catalyst mozzle, 10-stripping section, 11-riser, 12-collection chamber, the anti-scorch steam loop of 13-, 14-compensator, 15-settler, 16-connecting cylinder, 17-regenerator, 18-flutter valve mozzle.
Detailed description of the invention
See Fig. 1 ~ Fig. 3, Fig. 1 is 1 cyclone cylinder scheme, and Fig. 2 is pants shape connecting cylinder scheme, and Fig. 3 is special-shaped connecting cylinder scheme.Outlet 1, collection chamber 12, anti-scorch steam loop 13 are arranged at settler 15 top, and lower end is connected with regenerator 17, stripping section 10.Riser 11 outlet is connected with cyclone cylinder 6, and cyclone cylinder 6 upper end is revolved 4 with top be connected through cyclone cylinder blast pipe 5, top precession tracheae 3, and cyclone cylinder 6 lower end and connecting cylinder 16 upper end are flexible coupling, and connecting cylinder 16 lower end is connected with settler 15 bottom shell.Top is revolved 4 upper ends and is revolved blast pipe 2 be connected with collection chamber 12 through top, lower end connection dipleg 7 and flutter valve 8.Fig. 1, Fig. 2, catalyst mozzle 9 side is connected with connecting cylinder 16, and flutter valve 8 wraps up by upper end.Fig. 3, catalyst mozzle 9 lower end is connected with connecting cylinder 16 wall, and flutter valve mozzle 18 upper end is connected with flutter valve 8, and lower end reaches in catalyst mozzle 9.
See Fig. 1 ~ Fig. 3, the mixture of reaction oil gas and catalyst exports from riser 11 and flows out, and tangentially enter cyclone cylinder 6, oil gas and catalyst rotate in cyclone cylinder 6, under centrifugal action, carry out gas-solid centrifugation, its separative efficiency reaches more than 98%.Primary purifying oil gas is discharged from cyclone cylinder blast pipe 5, enters top revolve 4 through top precession tracheae 3; Revolve 4 on top and again carry out centrifugation, purification oil gas revolves blast pipe 2 to collection chamber 12 through top discharges through outlet 1.The catalyst that primary separation is got off flows downward along cyclone cylinder 6 inwall under gravity and falls into the stripping section 10 of below through connecting cylinder 16.Top is revolved the catalyst separated and is fallen into dipleg 7 and enter catalyst mozzle 9 through flutter valve 8 (Fig. 3 is again through flutter valve mozzle 18), falls into the stripping section 10 of below under gravity through connecting cylinder 16.Feed anti-scorch steam at anti-scorch steam loop 13, be full of settler 15 and slowly flow downward to along cross section in settler 15 bottom, enter from catalyst mozzle 9 is suitable for reading, a small amount of oil gas, the stripping gas of discharging with flutter valve enter in cyclone cylinder 6 from end opening together.
Claims (9)
1. a coaxial-type anti-coking gas-solid separating method, comprise oil gas and catalyst quick separating, push up and revolve the second-order separation, dipleg flutter valve discharge and oil gas and derive process, it is characterized in that: adopt airtight cyclone cylinder quick separating, and catalyst parallel works, airtight connection facility are set, itself and airtight cyclone cylinder quick separating, push up and revolve the second-order separation and be interconnected to form an airtight piece-rate system.
2. one kind realizes the equipment of inventive method described in claim 1, comprise the settler of coaxial structure, stripping section, riser, and cyclone cylinder quick disconnector, connecting cylinder, catalyst parallel works, airtight tube connector, top revolve, dipleg, flutter valve, steam loop.
3. equipment according to claim 2, is characterized in that: cyclone cylinder number of units 1 ~ 4, and every platform cyclone cylinder has 1 ~ 2 oil and gas import, and cyclone cylinder air inlet runner is tangential straight structure or snail shell coiling structure; Cyclone cylinder top is closed structure, and top center is provided with blast pipe; Along concordant with cyclone cylinder top board under blast pipe, or stretch into cyclone cylinder inside, stretching into part is straight tube or cone-shaped tube.
4. equipment according to claim 2, is characterized in that: connecting cylinder is circular cylinder or pants shape cylinder or special shape tube, and upper end is flexible coupling with cyclone cylinder bottom or leads and is connected, and lower end is connected with settler bottom shell or is connected with stripping section.
5. equipment according to claim 2, it is characterized in that: catalyst parallel works is passage, cross section is geometric form or combination shape or gradual change shape or abnormity, facade is straight shape or rolls over shape or abnormity, it is identical or not identical that number of units is revolved on number of channels and top, passage lower end or side be connected barrel and connect or reach in connecting cylinder, upper end is connected with flutter valve or is wrapped up or portion envelops by flutter valve.
6. equipment according to claim 2, is characterized in that: top spin material leg is vertical or broken pipe structure.
7. equipment according to claim 2, is characterized in that: airtight tube connector connects cyclone cylinder and top is revolved, and airtight tube connector standpipe section has compensator; Each cyclone cylinder blast pipe imports 1 concetrated pipe and revolves with each top and be connected, or every platform cyclone cylinder blast pipe revolves with 1 ~ 3 top respectively and is connected.
8. equipment according to claim 2, is characterized in that: settler top, bottom, connecting cylinder inside arrange steam loop or do not arrange.
9. equipment according to claim 2, it is characterized in that: riser is the main riser of feedstock oil, or recycle oil riser or gasoline rising pipe or subsidiary riser, or itself and the main riser of feedstock oil merge after riser, or each riser is connected with cyclone cylinder quick disconnector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310288817.9A CN104275037A (en) | 2013-07-09 | 2013-07-09 | Coaxial type anti-coking gas-solid separation method and equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310288817.9A CN104275037A (en) | 2013-07-09 | 2013-07-09 | Coaxial type anti-coking gas-solid separation method and equipment |
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| CN104275037A true CN104275037A (en) | 2015-01-14 |
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| CN201310288817.9A Pending CN104275037A (en) | 2013-07-09 | 2013-07-09 | Coaxial type anti-coking gas-solid separation method and equipment |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2716269Y (en) * | 2004-07-09 | 2005-08-10 | 张韩 | Coking resistant device for rapidly discharging oil gas for reaction settler |
| US7220351B1 (en) * | 1999-12-14 | 2007-05-22 | Institut Francais Du Petrole | Method and device for catalytic cracking comprising in parallel at least an upflow reactor and at least a downflow reactor |
| CN102206505A (en) * | 2011-04-26 | 2011-10-05 | 中国石油大学(北京) | Device for separately leading out stripped oil gas in catalytic cracking process |
| CN202346973U (en) * | 2011-09-20 | 2012-07-25 | 李小燕 | Anti-coking gas-solid rapid separation device |
| CN202829956U (en) * | 2012-06-26 | 2013-03-27 | 中国石油化工股份有限公司 | Petroleum hydrocarbon catalytic cracking device |
-
2013
- 2013-07-09 CN CN201310288817.9A patent/CN104275037A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7220351B1 (en) * | 1999-12-14 | 2007-05-22 | Institut Francais Du Petrole | Method and device for catalytic cracking comprising in parallel at least an upflow reactor and at least a downflow reactor |
| CN2716269Y (en) * | 2004-07-09 | 2005-08-10 | 张韩 | Coking resistant device for rapidly discharging oil gas for reaction settler |
| CN102206505A (en) * | 2011-04-26 | 2011-10-05 | 中国石油大学(北京) | Device for separately leading out stripped oil gas in catalytic cracking process |
| CN202346973U (en) * | 2011-09-20 | 2012-07-25 | 李小燕 | Anti-coking gas-solid rapid separation device |
| CN202829956U (en) * | 2012-06-26 | 2013-03-27 | 中国石油化工股份有限公司 | Petroleum hydrocarbon catalytic cracking device |
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Application publication date: 20150114 |
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