CN104548763A - Method and equipment for preventing outer raising pipe reactor from coking - Google Patents
Method and equipment for preventing outer raising pipe reactor from coking Download PDFInfo
- Publication number
- CN104548763A CN104548763A CN201310477151.1A CN201310477151A CN104548763A CN 104548763 A CN104548763 A CN 104548763A CN 201310477151 A CN201310477151 A CN 201310477151A CN 104548763 A CN104548763 A CN 104548763A
- Authority
- CN
- China
- Prior art keywords
- settler
- gas
- coking
- reactor
- oil gas
- 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.)
- Pending
Links
- 238000004939 coking Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000000926 separation method Methods 0.000 claims abstract description 25
- 239000003054 catalyst Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 4
- 230000002265 prevention Effects 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 4
- 241000973497 Siphonognathus argyrophanes Species 0.000 claims description 2
- 238000004523 catalytic cracking Methods 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000001172 regenerating effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 42
- 230000005484 gravity Effects 0.000 description 7
- 239000000295 fuel oil Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 238000006482 condensation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000008247 solid mixture Substances 0.000 description 2
- 238000004227 thermal cracking Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 210000000952 spleen Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to a method for preventing an outer raising pipe reactor from coking and belongs to the technical field of petrochemical engineering, and is used for solving the problem of coking in an outer raising pipe reaction settler of a catalytic cracking unit. The method comprises the steps of reaction in an external reactor, gas-solid quick reaction, top cyclone secondary separation, and oil gas and catalyst discharge, and is characterized in that an external spiral-flow type quick separation facility is arranged above the outer raising pipe reactor, primarily separated oil gas is led into the interior of the settler to be tightly connected with top cyclone secondary separation, and a primarily separated catalyst is led into the settler; the settler is provided with an anti-coking gas insulation area and used for leading out anti-coking gas, stripping gas and the oil gas discharged by a trickle valve, at the lower part of the settler. The method realizes no oil gas in the settler and clean production, and thoroughly solves the problem of coking in the settler. The invention further provides equipment such as an external spiral-flow type quick separator, a closed connecting pipe, a regenerating agent lead-out pipe, a gas-guide pipe and a separator. The method is used for the catalytic cracking unit of the outer raising pipe reactor.
Description
Technical field
The invention belongs to technical field of petrochemical industry, particularly a kind of method and apparatus of outer riser reactor slagging prevention.
Background technology
Refinery catalytic cracking unit is all provided with settler and riser reactor and works off one's feeling vent one's spleen solid fast separating device, to realize the quick separating of oil gas and catalyst, stops oil gas cracking reaction.Early stage quick separating equipment has umbrella crown, L, T-type structure pattern, separative efficiency is generally 70% ~ 80%, oil gas after primary separation rises at a slow speed in the settler that diameter is larger, then enters the cyclone separator (being called for short top to revolve) at settler top.In the settler time of staying, at high temperature still there is transition thermal cracking, condensation reaction, affect yield of light oil in early structure pattern reaction oil gas more than 20 seconds, when processing heavy oil easily in settler coking.Some device riser reactor outlets arrange several simple cyclone separators (be called for short and slightly revolve), efficiency can reach more than 95%, thick spin material leg discharges catalyst under positive differential pressure, discharge 10% ~ 30% oil gas simultaneously, this part oil gas top entering settler top of rising at a slow speed in settler together with stripping gas is revolved, this part oil gas in the settler time of staying more than 30 seconds, at high temperature there is transition thermal cracking, condensation reaction, affect yield of light oil, easily in settler coking during processing heavy oil.Some devices extend up to top screw in slightly revolving blast pipe near mouth, shorten the time of staying of oil extraction gas, but under thick spin material leg the oil extraction gas time of staying longlyer make settler coking more serious.
Cast catalytic cracking unit is promoted when setting up fast bed reactor in some block forms, because stripping section lower space is limited, have employed external riser and external quick disconnector, external quick disconnector blast pipe is connected with settler housing, and its underpart is connected with settler by spent agent fairlead, guiding valve to be generated.External leg outlet oil gas and catalyst mixture are through external quick separating, and primary separation oil gas introduces settler through blast pipe, screw in mouth through settler upper space diverging flow to each top, discharge to collection chamber through the second-order separation after-purification oil gas through outlet again.The catalyst that primary separation is got off enters settler bottom through spent agent fairlead, guiding valve to be generated, flows into stripping section by gravity; The oil gas that stripping gas and top rotor valve are discharged slowly flows to settler top and enters top screw-in mouth from settler bottom, this part oil gas, in the settler time of staying longer (~ 100 seconds), can cause settler coking when processing heavy oil.Such scheme Quick Separation System and top are revolved and are adopted conventional open type to be connected, and make stripping gas and flutter valve discharge gas stream through settler, reduce Quick Separation System containing rate, add settler coking chance.
Summary of the invention
The object of the invention is to improve prior art, a kind of method of outer riser reactor slagging prevention is provided, push up to revolve in external Quick Separation System and settler and adopt airtight connection, dedicated channel is set and derives stripping gas and flutter valve discharge oil gas, make it not flow through settler, improve Quick Separation System containing rate, thoroughly solve settler coking problem.
The present invention solves the method that its technical problem adopts: comprise external reactor reaction, gas-solid quick separating, top revolve the second-order separation, oil gas and catalyst and discharge, it is characterized in that: external spiral-flow type quick separating facility is set above riser reactor outside, and primary separation oil gas is guided to settler is inner revolves with top that the second-order separation is airtight to be connected, in the catalyst that primary separation got off introducing settler; Anti-scorch gas barrier district is set at settler, and anti-scorch gas, stripping gas and flutter valve discharge oil gas is derived in settler bottom.
Realize the outer riser reactor of anti-coking of described inventive method, comprise settler, top is revolved, stripping section, outer riser reactor, external spiral-flow type quick disconnector, airtight tube connector, anti-scorch gas distribution tube, division board, wireway; External spiral-flow type quick disconnector comprises cyclone and seal closure, outer riser reactor upper end is connected with cyclone, seal closure upper end blast pipe reaches inner the revolving with top through airtight tube connector of settler and is connected, and seal closure bottom is connected with settler through spent agent fairlead; Settler top arranges anti-scorch gas distribution tube, and bottom arranges division board and wireway.
Further, seal closure blast pipe reaches settler inside from settler side or from top.
Further, settler wireway is 1 ~ 10 pipeline, is arranged on settler inside, and inlet tube is revolved on upper end and top or airtight house steward is connected, and lower end reaches settler bottom, and wireway lower end is straight tube mouth or connects horn mouth or connect pants pipe; Or being arranged on settler outside, one end is connected with settler or stretches into settler inside, and the other end is connected with seal closure bottom; Or wireway and spent agent fairlead merge.
Further, spent agent fairlead arranges or does not arrange guiding valve.
Further, seal closure bottom arranges or does not arrange stripping baffles.
Further, outer riser reactor comprise riser reactor and with fast bed combined reactor.
Innovative point of the present invention and good effect are:
Innovative point of the present invention is: arrange external spiral-flow type quick separating facility outside above riser reactor, and primary separation oil gas is guided to settler is inner revolves with top that the second-order separation is airtight to be connected, in the catalyst that primary separation got off introducing settler; Anti-scorch gas barrier district is set at settler, and anti-scorch gas, stripping gas and flutter valve discharge oil gas is derived in settler bottom.
Good effect of the present invention is: 1, push up in external spiral-flow type quick disconnector and settler to revolve and be airtightly connected to form " negative pressure " piece-rate system, and whole oil gas, through Quick Separation System carrying-off (or on a small quantity through wireway), does not flow through settler; 2, settler top arranges anti-scorch gas barrier room, thoroughly avoids oil gas in settler coking.
Accompanying drawing explanation
Fig. 1 is a kind of method and apparatus schematic diagram of outer riser reactor slagging prevention.
1-blast pipe, 2-cyclone, 3-air inlet pipe, 4-seal closure, the outer bed bioreactor fast of 5-, the outer riser reactor of 6-, 7-oil gas vent, 8-collection chamber, the anti-scorch steam loop of 9-, 10-revolves on top, 11-settler, 12-division board, 13-stripping section, 14-wireway, the airtight tube connector of 15-, 16-spent agent fairlead, 17-guiding valve.
Fig. 2 is the method and apparatus schematic diagram of another kind of outer riser reactor slagging prevention.
1-blast pipe, 2-cyclone, 3-air inlet pipe, 4-seal closure, the outer bed bioreactor fast of 5-, the outer riser reactor of 6-, 7-oil gas vent, 8-collection chamber, the anti-scorch steam loop of 9-, 10-revolves on top, 11-settler, 12-division board, 13-stripping section, the airtight tube connector of 15-, 16-spent agent fairlead.
Detailed description of the invention
Seeing Fig. 1, is arrange interior wireway scheme, and outer riser reactor 6 upper end is connected with outer quick bed bioreactor 5 lower end, and outer quick bed bioreactor 5 upper end is connected with air inlet pipe 3 lower end, and air inlet pipe 3 upper end is connected with cyclone 2.Cyclone 2 and air inlet pipe 3 are placed in seal closure 4, and blast pipe 1 is arranged at seal closure 4 top, and bottom is connected with outer quick bed bioreactor 5 upper end and spent agent fairlead 16 upper end.Blast pipe 1 reaches settler 11 inside and is connected with airtight tube connector 15 one end, and airtight tube connector 15 other end revolves 10 with top respectively and is connected.Wireway 14 upper end and top are revolved 8 inlet tubes and are connected, and lower end reaches settler bottom.Settler 11 top is provided with anti-scorch steam loop 9, and bottom is provided with division board 12, and settler 11 bottom is connected with seal closure 4 bottom through guiding valve 17, spent agent fairlead 16.
Seeing Fig. 2, is wireway and spent agent fairlead Merge Scenarios, and outer riser reactor 6 upper end is connected with outer quick bed bioreactor 5 lower end, and outer quick bed bioreactor 5 upper end is connected with air inlet pipe 3 lower end, and air inlet pipe 3 upper end is connected with cyclone 2.Cyclone 2 and air inlet pipe 3 are placed in seal closure 4, and blast pipe 1 is arranged at seal closure 4 top, and bottom is connected with outer quick bed bioreactor 5 upper end and spent agent fairlead 16 upper end.Blast pipe 1 reaches settler 11 inside and is connected with airtight tube connector 15 one end, and airtight tube connector 15 other end revolves 10 with top respectively and is connected.Settler 11 top is provided with anti-scorch steam loop 9, and bottom is provided with division board 12, and settler 11 bottom is connected with spent agent fairlead 16 lower end.
See Fig. 1, oil gas and catalyst mixture flow out from outer riser reactor 6 upper end and enter outer quick bed bioreactor 5, with after enter cyclone 2 through air inlet pipe 3, flow out from cyclone 2 exit tangent direction, gas-solid mixture does high speed rotary motion in seal closure 4, by oil gas and catalyst quick separating under centrifugal action.Primary purifying oil gas is drawn from blast pipe 1, introduces top and revolves 10, again carry out centrifugation through airtight tube connector 15, and purification oil gas revolves 10 blast pipes through top, collection chamber 8 is discharged from oil gas vent 7.The primary separation catalyst that gets off falls seal closure 4 bottom by gravity, imports settler bottom through spent agent fairlead 16, guiding valve 17, then falls into the stripping section 13 of below by gravity, and top is revolved 10 and separated catalyst and fall into its dipleg by gravity and discharge through its flutter valve.Feed steam at anti-scorch steam loop 9, steam is full of the below that settler 11 slowly flows downward to division board 12, with stripping gas, pushes up together with a small amount of oil gas that rotor valve discharges and enters from wireway 14 end opening, be guided to top and revolve 10 entrances.Because settler 11 allows steam to enter, do not allow oil gas to enter thus thoroughly avoid oil gas in settler 11 coking.
See Fig. 2, oil gas and catalyst mixture flow out from outer riser reactor 6 upper end and enter outer quick bed bioreactor 5, with after enter cyclone 2 through air inlet pipe 3, flow out from cyclone 2 exit tangent direction, gas-solid mixture does high speed rotary motion in seal closure 4, by oil gas and catalyst quick separating under centrifugal action.Primary purifying oil gas is drawn from blast pipe 1, introduces top and revolves 10, again carry out centrifugation through airtight tube connector 15, and purification oil gas revolves 10 blast pipes through top, collection chamber 8 is discharged from oil gas vent 7.The primary separation catalyst that gets off falls seal closure 4 bottom by gravity, imports settler bottom through spent agent fairlead 16, then falls into the stripping section 13 of below by gravity, and top is revolved 10 and separated catalyst and fall into its dipleg by gravity and discharge through its flutter valve.Feed steam at anti-scorch steam loop 9, steam is full of settler 11 and slowly flows downward to below division board 12, with stripping gas, pushes up together with a small amount of oil gas that rotor valve discharges through spent agent fairlead 16 to seal closure 4 bottom.Because settler 11 allows steam to enter, enter without oil gas thus thoroughly avoid oil gas in settler 11 coking.
Claims (7)
1. the method for an outer riser reactor slagging prevention, comprise external reactor reaction, gas-solid quick separating, push up and revolve the discharge of the second-order separation, oil gas and catalyst, it is characterized in that: external spiral-flow type quick separating facility is set above riser reactor outside, and primary separation oil gas is guided to settler is inner revolves with top that the second-order separation is airtight to be connected, in the catalyst that primary separation got off introducing settler; Anti-scorch gas barrier district is set at settler, and anti-scorch gas, stripping gas and flutter valve discharge oil gas is derived in settler bottom.
2. the outer riser reactor of anti-coking, comprise settler, top revolved, stripping section, outer riser reactor, external spiral-flow type quick disconnector, airtight tube connector, anti-scorch gas distribution tube, division board, wireway; External spiral-flow type quick disconnector comprises cyclone and seal closure, outer riser reactor upper end is connected with cyclone, seal closure upper end blast pipe reaches inner the revolving with top through airtight tube connector of settler and is connected, and seal closure bottom is connected with settler through spent agent fairlead; Settler top arranges anti-scorch gas distribution tube, and bottom arranges division board and wireway.
3. anti-coking reactor according to claim 2, is characterized in that: seal closure blast pipe reaches settler inside from settler side or from top.
4. anti-coking reactor according to claim 2, it is characterized in that: settler wireway is 1 ~ 10 pipeline, be arranged on settler inside, inlet tube is revolved on upper end and top or airtight house steward is connected, lower end reaches settler bottom, and wireway lower end is straight tube mouth or connects horn mouth or connect pants pipe; Or being arranged on settler outside, one end is connected with settler or stretches into settler inside, and the other end is connected with seal closure bottom; Or wireway and spent agent fairlead merge.
5. anti-coking reactor according to claim 2, is characterized in that: spent agent fairlead arranges or do not arrange guiding valve.
6. anti-coking reactor according to claim 2, is characterized in that: seal closure bottom arranges or do not arrange stripping baffles.
7. anti-coking reactor according to claim 2, is characterized in that: outer riser reactor comprise riser reactor and with fast bed combined reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310477151.1A CN104548763A (en) | 2013-10-14 | 2013-10-14 | Method and equipment for preventing outer raising pipe reactor from coking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310477151.1A CN104548763A (en) | 2013-10-14 | 2013-10-14 | Method and equipment for preventing outer raising pipe reactor from coking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104548763A true CN104548763A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310477151.1A Pending CN104548763A (en) | 2013-10-14 | 2013-10-14 | Method and equipment for preventing outer raising pipe reactor from coking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104548763A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892943A (en) * | 2020-05-12 | 2020-11-06 | 浙江美福石油化工有限责任公司 | A riser recycling device for mixing aromatic hydrocarbons to prepare propylene |
| CN115364775A (en) * | 2022-08-17 | 2022-11-22 | 山东高端化工研究院有限公司 | Device for controlling reaction temperature in olefin preparation through crude oil catalytic cracking |
-
2013
- 2013-10-14 CN CN201310477151.1A patent/CN104548763A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892943A (en) * | 2020-05-12 | 2020-11-06 | 浙江美福石油化工有限责任公司 | A riser recycling device for mixing aromatic hydrocarbons to prepare propylene |
| CN111892943B (en) * | 2020-05-12 | 2025-02-14 | 浙江美福石油化工有限责任公司 | A riser recycling device for preparing propylene from mixed aromatics |
| CN115364775A (en) * | 2022-08-17 | 2022-11-22 | 山东高端化工研究院有限公司 | Device for controlling reaction temperature in olefin preparation through crude oil catalytic cracking |
| CN115364775B (en) * | 2022-08-17 | 2024-04-12 | 山东高端化工研究院有限公司 | Device for controlling reaction temperature in olefin preparation by crude oil catalytic pyrolysis |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |