CN1229175C - Gas-solid cyclone fast separation device for lifting pipe - Google Patents
Gas-solid cyclone fast separation device for lifting pipe Download PDFInfo
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- CN1229175C CN1229175C CN 02159408 CN02159408A CN1229175C CN 1229175 C CN1229175 C CN 1229175C CN 02159408 CN02159408 CN 02159408 CN 02159408 A CN02159408 A CN 02159408A CN 1229175 C CN1229175 C CN 1229175C
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- riser
- seal bootr
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- tube
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Abstract
The present invention relates to gas-solid cyclone rapid separation equipment for a lifting pipe, particularly to rapid high-efficient separation between a catalyst and oil gas in a reaction system of a catalytic cracking lifting pipe. The equipment comprises a lifting pipe, a conical stripping baffle plate, a diversion cylinder, a cyclone rapid separation head, a diversion baffle plate, a stripping pipe and a closed cover, wherein the cyclone rapid separation head is composed of 3 to 5 bending pipes downwards extending along a tangential direction. After a mixture of a catalyst and oil gas is sprayed along the bending pipes, the catalyst downwards rotates along the inner wall of the closed cover because of the action of centrifugal force, the separated oil gas rises along the diversion cylinder, and thus, rapid high-efficient gas-solid separation is realized.
Description
Technical field
The invention belongs to the petrochemical technology field, relate to the gas-solid vortex quick separation equipment of fluid catalytic cracking (FCC) riser reactor, particularly fluid catalytic cracking (FCC) riser reactor.
Background technology
In the riser exit of oil plant fluid catalytic cracking reaction system, fast gas-solid separator all is housed to realize separating of catalyst and oil gas, stop unnecessary overreaction.This separator has two big classes at present, the first kind is that inertia divides device soon, it is to rely on the oil gas that contains a large amount of catalyst granules sharply to change the gas-solid two-phase inertia difference that is produced when flowing to realize gas solid separation, the typical fast packing of inertia is equipped with structures such as inverted L shape, T type, Multiblade, their characteristics are that pressure drop is very little, generally be no more than 1kPa, but the solid particle efficient that first separation is come out from gas has only about 70～80%.The oil gas that separates behind most of catalyst rises at a slow speed in the bigger settler of diameter, in about cyclone separator that was just entered settler top in 20 seconds, the catalyst of carrying secretly is further separated, and catalyst enters settler bottom bed along cyclone dip-leg.The catalyst that separates is all being carried a certain amount of oil gas secretly, needs in the bed of settler bottom to blow with steam to put forward, and this part oil gas rises to the inlet of settler top cyclone separator again through the time more than 30 seconds.Like this, the mean residence time of the oil gas behind the catalytic cracking reaction in settler may reach 20～30 seconds, the back-mixing rate height of oil gas, be easy to take place the elevated temperature heat cracking like this, yield of light oil is reduced, and can cause serious coking in the settler, influence the device long-term operation.
Second class is a centrifugal separator, and the strong centrifugal force field that it relies on gas-solid two-phase mixture to rotate formation rapidly realizes that gas-solid separates fast.Typical example is the one group of cyclone separator of outlet direct connection (be called for short and slightly revolve) at riser reactor, and its gas solid separation efficient can be up to more than 98%.The oil gas that separates most of catalyst is discharged from slightly revolving riser, enter settler space, rise with slower speed, through just being entered more than 10 seconds in the cyclone separator on settler top, oil gas further separates the catalyst of carrying secretly by this cyclone separator.Thick spin material leg is to discharge catalyst under positive differential pressure, when so a large amount of catalyst drops to settler bottom bed stripping section, not only the catalyst particles intergranular has been carried part oil gas secretly, flows downward, and also have a part of oil gas that sprays downwards under positive differential pressure from dipleg.These oil gas mix with stripping gas, and then rise at a slow speed along settler and to enter the cyclone separator on settler top.Make the mean residence time of reacted oil gas in settler still up to 10～20 seconds like this, at high temperature still have the overcracking phenomenon, influence the safe long-term operation of yield of light oil and device.
Divide device gas solid separation efficient not high problem soon for solving first kind inertia-type, U.S. Pat 4,495, ejection type quickly separating method and device have been developed in 063 (1985), its gas-solid first separation efficient reaches 80～90%, and the gas backmixing rate is reduced to about 20%, but pressure drop is up to thousands of handkerchiefs, operating flexibility is less, and industrial application has certain difficulty.U.S. Pat 4,364,905 (nineteen eighty-twos), US5,294,331 (1994), US5,364,515 (1994), US 5,393,414 (nineteen ninety-fives) improved again the fast branch of ejection type, mainly were in order further to shorten the mean residence time of oil gas in settler.But ejection type divides separative efficiency also not too high soon, and operating flexibility is again little, and industrial failing applied.
For solving the problem of second class device existence in centrifugal fast minute, U.S. Pat 4,502,947 (1985), US4,579,716 (1986), US4,624, enclosed direct connection cyclone separation system has been developed in 772 (1986) etc., to slightly revolve riser and directly link to each other, shorten the time of staying of oil gas in settler greatly, and make the back-mixing rate of gas further drop to 6～10% with settler top cyclone inlet, but the poor-performing of its compressive resistance fluctuation is wanted SC when going into operation.U.S. Pat 5 subsequently, 158,669 (1992), US5,314,611 (1994), European patent EP 0593827A1, Chinese patent CN 92112441 (1992) etc. have directly connected a stripping section in the portion of screwing off slightly again, change part reaction back oil gas rough sledding of ejection downwards from thick spin material leg, further shortened the mean residence time of reaction back oil gas in settler, oil gas back-mixing rate is further dropped to below 2% again.
The circular arc bend pipe that U.S. Pat 4,482,451 (1984) have adopted several downward-sloping certain angles at the riser end is as the gas-solid quick disconnector, and adds a seal bootr outside to realize drawing fast of oil gas.And U.S. Pat 4,572,780 (1986) and US4,689,206 (1987) are provided with air deflector at the port of export of riser, and air deflector has two downward-sloping steering tubes.
In recent years, domestic petroleum university (Beijing) has developed FSC (Chinese patent ZL96103419.X), VQS (Chinese patent ZL96103478.5, ZL96103420.3, ZL01228805.5) and CSC (Chinese patent ZL98102166.2, ZL98204681.2) system.The FSC system has adopted just revolves the riser export structure that combines with the pre-stripper that adds ring baffle.Because added ring baffle in pre-stripper, Srteam Stripping effect has bigger improvement than the VDS system of UOP.The CSC system has adopted just revolves or riser export structure that vortex quick separation combines with the pre-stripper that adds close-phase circulation.Because adopted the pre-gas stripping process of close-phase circulation, Srteam Stripping effect has had further raising again than FSC system, and structure is also very simple.The main distinction of the VSS system of VQS system and UOP is the improvement at eddy flow header structure and lower annular baffle arrangement.Yet, the fast subset of these spiral-flow types of VSS and VQS, its gas solid separation efficient generally is no more than 98～99%.
Through domestic and foreign literature and patent retrieval, do not find document and patent report that the major technique feature is identical with major technique feature of the present invention.
Summary of the invention
The purpose of this invention is to provide the riser gas-solid vortex quick separation equipment that to realize that gas-solid separates fast, separative efficiency is high.
Riser gas-solid vortex quick separation equipment of the present invention, comprise riser, the shunting tube, stripping tube, vortex flow quick separately, distributing damper, seal bootr, it is characterized in that seal bootr (9) is cylindrical shape, seal bootr (9) inside comprises riser (1), taper stripping baffles (2), shunting tube (3), vortex flow quick is (4) separately, distributing damper (5) and stripping tube (10), the port of export of riser (1) is connected with vortex flow quick parted hair (4), shunting tube (3) is positioned at the outlet position of riser (1) and exports the position coaxial line with riser (1), between the outer wall at riser (1) outlet position and shunting tube (3) inwall a circular passage is arranged, vortex flow quick a plurality of bend pipes (7) of (4) separately passes the wall of shunting tube (3) respectively, the port of export of bend pipe (7) is positioned at by seal bootr (9), in the space that shunting tube (3) and distributing damper (5) constitute, distributing damper (5) place vortex flow quick separately (4) top and be welded on seal bootr (9) inwall and the outer wall of shunting tube (3) on, stripping tube (10) is positioned at the bottom of seal bootr (9).
Riser gas-solid vortex quick separation equipment of the present invention is characterized in that riser (1) can place the inside of seal bootr (9) also can place the outside of seal bootr (9).When riser (1) placed seal bootr (9) outside, the top of riser (1) turned in the top of distributing damper (5), passes seal bootr (9), and placed downwards in the shunting tube (3).
Riser gas-solid vortex quick separation equipment of the present invention, it is characterized in that vortex flow quick parted hair (4) is provided with 3～5 bend pipes (7), downward-sloping separately 0～45 degree, and make arranged tangential along seal bootr (9) inwall, the ejiction opening cross section of bend pipe (7) end is rectangle or circle.
Riser gas-solid vortex quick separation equipment of the present invention, the circulation area that it is characterized in that circular passage between the outer wall at riser (1) outlet position and shunting (3) inwall are 0.04～0.36 times of seal bootr sectional area.
Riser gas-solid vortex quick separation equipment of the present invention, it is characterized in that being positioned at vortex flow quick and have a plurality of sieve apertures on the taper stripping baffles (2) of the bottom of (4) separately, aperture φ 3～φ 15mm, with seal bootr (9) is that the percent opening of benchmark is 1～15%, the positive pitch of taper stripping baffles (2) is 30 °～60 °, with vortex flow quick separately the vertical range of bend pipe (7) ejiction opening be 0.6～3 times of internal diameter of seal bootr (9), also can arrange a plurality of taper stripping baffles below the taper stripping baffles (2).
Technical scheme of the present invention is, seal bootr inside comprises riser, the taper stripping baffles, the shunting tube, vortex flow quick separately, distributing damper and stripping tube, the port of export of riser is connected separately with vortex flow quick, the shunting tube is positioned at the outlet position of riser and exports the position coaxial line with riser, between the outer wall at riser outlet position and the shunting tube inwall circular passage is arranged, vortex flow quick a plurality of bend pipes separately pass the wall of shunting tube respectively, the port of export of bend pipe is positioned at by seal bootr, in the space that shunting tube and distributing damper constitute, distributing damper place vortex flow quick separately top and be welded on the seal bootr inwall and the outer wall of shunting tube on, stripping tube is positioned at the bottom of seal bootr.
Technical solution of the present invention is, on the upper end tube wall of shutting on the riser top, evenly have 3～5 rectangular openings or circular port, each place, hole picks out a downward downward-sloping gradually hollow bent pipe, the end of each bend pipe is rectangle or circular opening, the inwall of seal bootr is close in its outside, and makes arranged tangential along the seal bootr inwall.Outlet enters vortex flow quick parted hair and bend pipe through riser for reaction back oil gas and mixture of catalysts, catalyst and gas mixture are along the tangential ejection of bend pipe, catalyst is because centrifugal action is downward along the rotation of seal bootr inwall, isolated oil gas rises along the shunting tube, isolated catalyst granules rotation downwards, drop on the taper stripping baffles, steam from stripping tube makes progress by the sieve aperture of taper stripping baffles, contact with catalyst, remaining oil gas stripping in the catalyst is come out, the oil gas of the oil gas that stripping comes out after above-mentioned the separation enters the upper space of seal bootr by the circular passage between riser outer wall and the shunting tube inwall.Like this, the present invention has just realized that the efficient of gas-solid separates fast.
The present invention can arrange a plurality of taper stripping baffles that have sieve aperture in the bottom of seal bootr, depends on the needs.
The present invention has following good effect: can realize that efficient gas-solid separates fast, gas can be drawn fast, both realized gas-solid 99.9% above separative efficiency, simultaneously the mean residence time of oil gas in settler reduced to below 4 seconds, thereby avoided the cracking reaction of crossing that excessive contact owing to catalyst and product causes, avoided the coking in the settler, the distribution of product is improved.
Description of drawings
Fig. 1 is the front view of the riser gas-solid vortex quick separation equipment of riser of the present invention in seal bootr.
Fig. 2 is the front view of the riser gas-solid vortex quick separation equipment of riser of the present invention outside seal bootr.
Fig. 3 is the vertical view of eddy flow head.
Among Fig. 1 to Fig. 3,1 is riser, and 2 are the taper stripping baffles, and 3 are the shunting tube, 4 is the vortex flow quick parted hair, 5 is distributing damper, and 7 is vortex flow quick bend pipe separately, and 9 is seal bootr, 10 is stripping tube, D1 represents the external diameter of riser (1), the external diameter of D2 representative shunting tube (3), and D3 represents the internal diameter of seal bootr (9).
The specific embodiment
Referring to Fig. 1, in this embodiment, riser (1) places the inside of seal bootr (9).Seal bootr (9) be one columnar structured, seal bootr (9) inside comprises riser (1), taper stripping baffles (2), shunting tube (3), vortex flow quick is (4) separately, distributing damper (5) and stripping tube (10), the port of export of riser (1) is connected with vortex flow quick parted hair (4), shunting tube (3) be positioned at riser (1) the outlet position and with riser (1) coaxial line, between the outer wall at riser (1) outlet position and shunting tube (3) inwall a circular passage is arranged, vortex flow quick a plurality of bend pipes (7) of (4) separately passes the wall of shunting tube (3) respectively, the port of export of bend pipe (7) is positioned at by seal bootr (9), in the space that shunting tube (3) and distributing damper (5) constitute, distributing damper (5) place vortex flow quick separately (4) top and be welded on seal bootr (9) inwall and the outer wall of shunting tube (3) on, taper stripping baffles (2) places the vortex flow quick bottom of (4) separately, have a plurality of sieve apertures on it, aperture φ 3～φ 15mm, with seal bootr (9) is that the percent opening of benchmark is 1～15%, the positive pitch of taper stripping baffles (2) is 30 °～60 °, with vortex flow quick separately the vertical range of bend pipe (7) ejiction opening of (4) be 0.6～3 times of internal diameter of seal bootr (9), can arrange also that below several layers has the stripping baffles of sieve aperture, depends on the needs.Stripping tube (10) is positioned at seal bootr (9) bottom.
Catalyst and gas mixture upwards enter vortex flow quick (4) separately through riser (1), through the vortex flow quick tangential ejection downwards of bend pipe (7) of (4) separately, form rotatablely moving of gas-solid mixture at the inwall of seal bootr (9), the most catalyst in the mixture under effect of centrifugal force separated drop to taper stripping baffles in the stripping section down and along the inwall of seal bootr (9) on.In stripping section, catalyst is wandered downwards along a plurality of taper stripping baffles (2) successively, and by the stripping gas of the stripping tube (10) of baffle plate bottom ejection the air-blowing of catalyst particles intergranular entrained oil is put forward.The oil gas of the oil gas that stripping goes out after catalyst separation rises on the circular passage through constituting between shunting tube (3) and the riser (1), thereby realizes that the efficient of catalyst and oil gas separates fast.
Referring to Fig. 2, in this embodiment, riser (1) places the outside of seal bootr, and (1) top of riser turns in the top of distributing damper (5), passes seal bootr (9), and places downwards in the shunting tube (3).Seal bootr (9) be one columnar structured, seal bootr (9) inside comprises riser (1), taper stripping baffles (2), shunting tube (3), vortex flow quick is (4) separately, distributing damper (5) and stripping tube (10), the port of export of riser (1) is connected with vortex flow quick parted hair (4), shunting tube (3) be positioned at riser (1) the outlet position and with the outlet position coaxial line of riser (1), between the outer wall at riser (1) outlet position and shunting tube (3) inwall a circular passage is arranged, vortex flow quick a plurality of bend pipes (7) of (4) separately passes the wall of shunting tube (3) respectively, the port of export of bend pipe (7) is positioned at by seal bootr (9), in the space that shunting tube (3) and distributing damper (5) constitute, distributing damper (5) place vortex flow quick separately (4) top and be welded on seal bootr (9) inwall and the outer wall of shunting tube (3) on, taper stripping baffles (2) places the vortex flow quick bottom of (4) separately, have a plurality of sieve apertures on it, aperture φ 3～φ 15mm, with seal bootr (9) is that the percent opening of benchmark is 1～15%, the positive pitch of taper stripping baffles (2) is 30 °～60 °, with vortex flow quick separately the vertical range of bend pipe (7) ejiction opening of (4) be 0.6～3 times of internal diameter of seal bootr (9), can arrange also that below several layers has the stripping baffles of sieve aperture, depends on the needs.Stripping tube (10) is positioned at seal bootr (9) bottom.
Catalyst and gas mixture upwards and after turning to enter vortex quick separation head (4) through riser (1), through the vortex flow quick tangential ejection downwards of bend pipe (7) of (4) separately, form rotatablely moving of gas-solid mixture at the inwall of seal bootr (9), the most catalyst in the mixture under effect of centrifugal force separated drop to taper stripping baffles in the stripping section down and along the inwall of seal bootr (9) on.In stripping section, catalyst is wandered downwards along a plurality of taper stripping baffles (2) successively, and by the stripping gas of the stripping tube (10) of baffle plate bottom ejection the air-blowing of catalyst particles intergranular entrained oil is put forward.The oil gas of the oil gas that stripping goes out after catalyst separation rises on the circular passage through constituting between shunting tube (3) and riser (1) the outlet position, realizes that the efficient of catalyst and oil gas separates fast.
Claims (5)
1. riser gas-solid vortex quick separation equipment, comprise riser, the shunting tube, stripping tube, vortex flow quick separately, distributing damper, seal bootr, it is characterized in that seal bootr (9) is cylindrical shape, seal bootr (9) inside comprises riser (1), taper stripping baffles (2), shunting tube (3), vortex flow quick is (4) separately, distributing damper (5) and stripping tube (10), the port of export of riser (1) is connected with vortex flow quick parted hair (4), shunting tube (3) is positioned at the outlet position of riser (1) and exports the position coaxial line with riser (1), between the outer wall at riser (1) outlet position and shunting tube (3) inwall a circular passage is arranged, vortex flow quick a plurality of bend pipes (7) of (4) separately passes the wall of shunting tube (3) respectively, the port of export of bend pipe (7) is positioned at by seal bootr (9), in the space that shunting tube (3) and distributing damper (5) constitute, distributing damper (5) place vortex flow quick separately (4) top and be welded on seal bootr (9) inwall and the outer wall of shunting tube (3) on, stripping tube (10) is positioned at the bottom of seal bootr.
2. riser gas-solid vortex quick separation equipment according to claim 1 is characterized in that riser (1) can place the inside of seal bootr (9) also can place the outside of seal bootr (9).
3. riser gas-solid vortex quick separation equipment according to claim 1 is characterized in that vortex flow quick parted hair (4) is provided with 3～5 bend pipes (7), downward-sloping separately 0～45 degree, and the ejiction opening cross section of bend pipe end is rectangle or circle.
4. riser gas-solid vortex quick separation equipment according to claim 1, the circulation area that it is characterized in that circular passage between the outer wall at riser (1) outlet position and shunting (3) inwall are 0.04～0.36 times of seal bootr sectional area.
5. riser gas-solid vortex quick separation equipment according to claim 1, it is characterized in that being positioned at vortex flow quick and have a plurality of sieve apertures on the taper stripping baffles (2) of the bottom of (4) separately, aperture φ 3～φ 15mm, with seal bootr (9) is that the percent opening of benchmark is 1～15%, the positive pitch of taper stripping baffles (2) is 30 °～60 °, with vortex flow quick separately the vertical range of bend pipe (7) ejiction opening be 0.6～3 times of internal diameter of seal bootr (9), also can arrange a plurality of taper stripping baffles below the taper stripping baffles (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159408 CN1229175C (en) | 2002-12-31 | 2002-12-31 | Gas-solid cyclone fast separation device for lifting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159408 CN1229175C (en) | 2002-12-31 | 2002-12-31 | Gas-solid cyclone fast separation device for lifting pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1511628A CN1511628A (en) | 2004-07-14 |
| CN1229175C true CN1229175C (en) | 2005-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02159408 Expired - Lifetime CN1229175C (en) | 2002-12-31 | 2002-12-31 | Gas-solid cyclone fast separation device for lifting pipe |
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| CN (1) | CN1229175C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101322924B (en) * | 2008-07-28 | 2010-06-02 | 中国石油化工集团公司 | Equipment for mixing catalyst |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8747504B2 (en) | 2011-12-16 | 2014-06-10 | Uop Llc | Gas-solids separation units and methods for the manufacture thereof |
| CN109550318B (en) * | 2018-12-03 | 2023-11-17 | 中国石油大学(北京) | Gas-liquid separator and separation method thereof |
-
2002
- 2002-12-31 CN CN 02159408 patent/CN1229175C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101322924B (en) * | 2008-07-28 | 2010-06-02 | 中国石油化工集团公司 | Equipment for mixing catalyst |
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| Publication number | Publication date |
|---|---|
| CN1511628A (en) | 2004-07-14 |
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