CN202786134U - Novel connection mode between coarse cyclone and top cyclone in fluid catalyst cracking (FCC) settler and components - Google Patents
Novel connection mode between coarse cyclone and top cyclone in fluid catalyst cracking (FCC) settler and components Download PDFInfo
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- CN202786134U CN202786134U CN 201220183391 CN201220183391U CN202786134U CN 202786134 U CN202786134 U CN 202786134U CN 201220183391 CN201220183391 CN 201220183391 CN 201220183391 U CN201220183391 U CN 201220183391U CN 202786134 U CN202786134 U CN 202786134U
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Abstract
The utility model discloses a novel connection mode between coarse cyclone and top cyclone in a fluid catalyst cracking (FCC) settler and components. The novel connection mode is characterized in that one end of a small diameter of a gradually-enlarged section (2) is coaxially connected with a rotational flow pipe (1); an exhaustion pipe (4) is concentric to the rotational flow pipe (1) and the gradually-enlarged section (2); the tail end of the exhaustion pipe (4) is deepened into the gradually-enlarged section (2) or arranged outside the gradually-enlarged section (2); a flow limiting cover (3) is positioned outside the gradually-enlarged section (2) and the exhaustion pipe (4). By the connection mode and the components, oil gas at a coarse cyclone outlet can be introduced into the top cyclone instead of a settler space, so that the average staying time of the oil gas in the settler can be reduced, and coking in the settler can be inhibited; and meanwhile, the concentration of the catalyst flowing into the top cyclone is reduced by more than half by rotation kinetic energy in a coarse cyclone exhaustion pipe under the premise that additional energy is not consumed, the runoff of the catalyst is reduced, and the stable operation of the FCC is guaranteed; and in addition, the volume of the settler can be further reduced. By the structure, the connection mode and the components can be applied on all occasions on which the rotation flow is carried out, such as connection between coarse cyclone (rapid decomposition) and the top cyclone of the FCC settler.
Description
Technical field
The present invention relates to a kind of for slightly revolving (fast minute) and top novel connecting mode and the member between revolving in the catalytic cracking subsider.Settling vessel is fluid catalytic cracking (Fluid Catlyst Cracking, be called for short FCC) important device of the course of processing, the two stage cyclone separator that is comprised by inside (slightly revolve or divide soon, push up and revolve and syndeton), shell structure and stripping parts etc. form.In settling vessel, use mode of connection of the present invention and member, can suppress coking in the settling vessel, reduce catalyst stack less, make the FCC operation more steady.Simultaneously, the settling vessel volume can further reduce.
Background technology
At present settling vessel slightly revolves or divides soon and be divided into connecting mode between revolve on the top that open form connects and directly connection etc. is several.When using open form to connect, the oil gas of thick screw outlet is introduced into settler space, then enters the top and revolves, therefore having a large portion oil gas can not directly enter the top revolves, but enter settler space, what stop in settling vessel is chronic, causes coking in the settling vessel.When directly connecting, airtight direct connection is arranged and hold the V shape mode of connection, the turndown ratio of airtight direct connection is poor, in the shutting down stage, or when operation has fluctuation, can cause that the larger race of catalyzer is decreased; Hold the V shape mode of connection by the invention of American UOP company, can make oil gas enter the top and revolve, and not enter settler space, reduce coking in the settling vessel, but it does not possess the separation function to catalyzer, can cause that in the shutting down stage the larger race of catalyzer is decreased.In above mode of connection, slightly revolve or fast branched discharge pipe in rotation energy do not obtain utilizing, the separation efficiency of separation system is further improved.
Summary of the invention
The present invention proposes a kind of slightly revolving and push up novel connecting mode and member between revolving for catalytic cracking subsider.This novel connecting mode can make the oil gas of thick screw outlet enter the top fully and revolve and do not enter settler space, thereby can reduce the oil gas residence time, can suppress coking in the settling vessel; This structure also has the again separation function to catalyzer simultaneously, can utilize the rotation energy that slightly revolves the interior oil gas of vapor pipe and granules of catalyst, reduce by more than 50 entering the catalyst concn that revolves on the top, the race that greatly reduces catalyzer is decreased, and pressure drop is very low, does not consume extra energy; The stripped vapor that produces at main stripping stage and oil gas still can enter the top by this coupling device and revolve, and make whole operating process smooth running.
Because after adopting this novel connecting mode, the junction that screws on thick screw outlet and top mouthful has the stronger again separation function to catalyzer, make and enter the gas that revolves of top to contain the concentration of catalyzer minimum, and be not subjected to impact and the restriction of settlement space and settling vessel structure, thereby can design the settling vessel that volume is little, efficient is high, energy consumption is low, simple to operate.And after the height of settling vessel descended, the height of riser reactor also can reduce, and the present general long interior reaction process of riser tube is to a certain degree optimized.This connecting mode manufacturing is installed easily, changes very little to device in industrial application.
Slightly revolve in the FCC settling vessel that the present invention proposes and Novel connection type and the member of top between revolving, be positioned at settling vessel shell 12 inside, by rotation incoming flow pipe 1, divergent segment 2, current limliting cover 3, vapor pipe 4, stripped vapor entrance 5, top buffering separated space 6, annular is connected separated space 7 and dust-exhausting port and stripped vapor entrance 8 and forms, it is characterized in that: minor diameter one end of divergent segment 2 and rotation 1 coaxial connection of incoming flow pipe, vapor pipe 4 and rotation incoming flow pipe 1, divergent segment 2 is concentric, vapor pipe 4 ends go deep into divergent segment 2 or in the outside of divergent segment 2, current limliting cover 3 is positioned at divergent segment 2 and vapor pipe 4 outsides.
Slightly revolve in the described FCC settling vessel and the Novel connection type and member of top between revolving in, the rotation incoming flow pipe 1 coaxial pipeline that is connected in the vapor pipe of cyclonic separator or has the rotation dust-contained airflow, perhaps itself be exactly cyclonic separator vapor pipe or any other have the rotation dust-contained airflow pipeline, its diameter is D1, and its length is 0.5D1～200D1.
Slightly revolve in the described FCC settling vessel and the Novel connection type and member of top between revolving in, the cone segment length L0 of divergent segment 2 is 0.1D1～10D1, enlarging diameter D2 is 0.5D1～5.0D1.
Slightly revolve in the described FCC settling vessel and the Novel connection type and member of top between revolving in, when vapor pipe 4 ends goed deep into divergent segment 2, its depth of penetration was 0～5.0D1; When vapor pipe 4 ends did not stretch into divergent segment 2, the distance L 1 of itself and divergent segment 2 enlargings place was 0～8.0D1, and the degree of depth L5 that vapor pipe 4 inserts in the current limliting covers 3 are 0～10D1, and the diameter D3 of vapor pipe 4 and D4 are 0.3D1～2.5D1; When D3=D4, vapor pipe 4 is straight tube; When D3＜D4, vapor pipe 4 is with reducing, and the length L 2 of reducing part is 0.2D1～10D1.
Slightly revolve in the described FCC settling vessel and the Novel connection type and member of top between revolving in, the upper diameter D5 of current limliting cover 3 is 1.0D1～10D1, its underpart diameter D6 and D7 are 1.0D1～15D1; When D6=D7, its underpart is cylindrical, and its upper height L3 is 0～8.0D1, and its underpart height L4 is 0～8.0D1; The inside of current limliting cover 3 makes fold-line-shaped or arc line shaped by interior lining, is beneficial to outside the flowing of particle.
Slightly revolve in the described FCC settling vessel and the Novel connection type and member of top between revolving in, stripped vapor entrance 5 is comprised of circumferential 2-20 the circular hole that is positioned on the vapor pipe 4, the diameter D8 of circular hole is 0.01D1～0.3D1, and the circumference at circular hole place distance L 6 on edge to the current limliting cover 3 is 0.1D1～5.0D1; The circular hole of stripped vapor entrance 5 is along on the same circular section on the short transverse or along the distribution straggly of circumference height, along circumferentially uniform or non-uniform.
Slightly revolve in the described FCC settling vessel and the Novel connection type and member of top between revolving in, annular is connected separated space 7 and is comprised of current limliting cover 3 internal spaces, its shape is determined by shape and the position of current limliting cover 3, vapor pipe 4 and divergent segment 2, within it vapor pipe 4 and the distance L between the divergent segment 21 are-5.0D1～8.0D1 that negative value represents that vapor pipe 4 gos deep into the degree of depth of divergent segment 2.
Slightly revolve in the described FCC settling vessel and the Novel connection type and member of top between revolving in, dust discharge and stripped vapor entrance 8 are positioned at the bottom of current limliting cover 3, its external diameter is exactly the diameter D7 of current limliting cover 3 bottoms, its internal diameter is the external diameter of rotation incoming flow pipe 1.
Slightly revolve in the described FCC settling vessel and Novel connection type and the member of top between revolving is applicable to the occasion that all have the rotation incoming flow, slightly revolve and divide soon outlet etc. such as the FCC settling vessel.
Therefore, sum up slightly revolve in the FCC settling vessel of the present invention and the top between revolving Novel connection type and the advantage of member comprise:
(1) makes slightly the oil gas that revolves (or fast minute) outlet all enter the top and revolve, and do not enter settler space, greatly reduce the mean residence time of oil gas in the settling vessel separation system, eliminate the coking in the settling vessel, and optimize the transformation efficiency of whole technique;
(2) utilize the rotation energy that slightly revolves in the vapor pipe, make to enter more than the dust content drop by half that revolves on the top, the separation efficiency of separation system is further improved, reduce the race of catalyzer and decrease, and do not increase pressure drop;
(3) reduce the settling vessel volume.
Description of drawings
Fig. 1 slightly revolves in the FCC settling vessel that proposes of the present invention and Novel connection type and the member synoptic diagram of top between revolving.
Fig. 2 is the Novel connection type that proposes of the present invention and member with the embodiment synoptic diagram in the FCC settling vessel that slightly revolves.
Among Fig. 1,1. rotate incoming flow pipe (slightly revolving exhaust outlet), 2. divergent segment, 3. current limliting cover, 4. vapor pipe, 5. stripped vapor entrance, 6. top buffering separated space, 7. annular linking separated space, 8. dust discharge and stripped vapor entrance.
Among Fig. 2,9. slightly revolve, 10. Novel connection component of the present invention, 12. settling vessel shells are revolved on 11. tops.
Embodiment
With reference to figure 1 and Fig. 2, slightly revolve in the FCC settling vessel that the present invention proposes and Novel connection type and the member of top between revolving, be positioned at settling vessel shell 12 inside, by rotation incoming flow pipe 1, divergent segment 2, current limliting cover 3, vapor pipe 4, stripped vapor entrance 5, top buffering separated space 6, annular is connected separated space 7 and dust discharge and stripped vapor entrance 8 and forms, it is characterized in that: minor diameter one end of divergent segment 2 and rotation 1 coaxial connection of incoming flow pipe, vapor pipe 4 and rotation incoming flow pipe 1, divergent segment 2 is concentric, vapor pipe 4 ends go deep into divergent segment 2 or in the outside of divergent segment 2, current limliting cover 3 is positioned at divergent segment 2 and vapor pipe 4 outsides.
With reference to figure 1, the rotation incoming flow pipe 1 coaxial pipeline that is connected in the vapor pipe of cyclonic separator or has the rotation dust-contained airflow, perhaps itself be exactly cyclonic separator vapor pipe or any other have the rotation dust-contained airflow pipeline, its diameter is D1, its length is 0.5D1～200D1.
With reference to figure 1, the cone segment length L0 of divergent segment 2 is 0.1D1～10D1, and enlarging diameter D2 is 0.5D1～5.0D1.
With reference to figure 1, when vapor pipe 4 ends goed deep into divergent segment 2, its depth of penetration was 0～5.0D1; When vapor pipe 4 ends did not stretch into divergent segment 2, the distance L 1 of itself and divergent segment 2 enlargings place was 0～8.0D1, and the degree of depth L5 that vapor pipe 4 inserts in the current limliting covers 3 are 0～10D1, and the diameter D3 of vapor pipe 4 and D4 are 0.3D1～2.5D1; When D3=D4, vapor pipe 4 is straight tube; When D3＜D4, vapor pipe 4 is with reducing, and the length L 2 of reducing part is 0.2D1～10D1.
With reference to figure 1, the upper diameter D5 of current limliting cover 3 is 1.0D1～10D1, and its underpart diameter D6 and D7 are 1.0D1～15D1; When D6=D7, its underpart is cylindrical, and its upper height L3 is 0～8.0D1, and its underpart height L4 is 0～8.0D1; The inside of current limliting cover 3 makes fold-line-shaped or arc line shaped by interior lining, is beneficial to outside the flowing of particle.
With reference to figure 1, stripped vapor entrance 5 is comprised of circumferential 2-20 the circular hole that is positioned on the vapor pipe 4, and the diameter D8 of circular hole is 0.01D1～0.3D1, and the circumference at circular hole place distance L 6 on edge to the current limliting cover 3 is 0.1D1～5.0D1; The circular hole of stripped vapor entrance 5 is along on the same circular section on the short transverse or along the distribution straggly of circumference height, along circumferentially uniform or non-uniform.
With reference to figure 1, annular is connected separated space 7 and is comprised of current limliting cover 3 internal spaces, its shape is determined by shape and the position of current limliting cover 3, vapor pipe 4 and divergent segment 2, within it vapor pipe 4 and the distance L between the divergent segment 21 are-5.0D1～8.0D1 that negative value represents that vapor pipe 4 gos deep into the degree of depth of divergent segment 2.
With reference to figure 1, dust discharge and stripped vapor entrance 8 are positioned at the bottom of current limliting cover 3, and its external diameter is exactly the diameter D7 of current limliting cover 3 bottoms, and its internal diameter is the external diameter of rotation incoming flow pipe 1.
With reference to figure 1, slightly revolve in the described FCC settling vessel and Novel connection type and the member of top between revolving is applicable to the occasion that all have the rotation incoming flow, slightly revolve and divide soon outlet etc. such as the FCC settling vessel.
Slightly revolve in the FCC settling vessel that the present invention proposes and the top between revolving Novel connection type and the use procedure of member, for example can be: through primary separation, the dusty gas of discharging from the vapor pipe that slightly revolves or divide soon still has rotation energy, dusty gas rotation wherein travels forward, through slightly revolving or the coaxial long straight length that is connected of fast branched discharge pipe with above-mentioned---after the rotation incoming flow pipe 1, solid particulate is done rotation forward movement (spiral forward movement) near being thrown to the inwall that rotates incoming flow pipe 1; During through divergent segment 2, solid particulate further forward, outwards motion, after particle and gas leave divergent segment 2, enter annular and be connected separated space 7, solid particulate is owing to radially losing restriction, outwards motion under the rotary centrifugal force effect, the gas that the centre is clean then enters vapor pipe 4.Because vapor pipe 4 external diameters are less than the internal diameter of divergent segment 2, the rotation outwards solid particulate of motion can not enter vapor pipe 4, and outwards be moved into vapor pipe 4 outsides, the top buffering separated space 6 and the annular that are contained by current limliting cover 3 be connected separated space 7; Current limliting cover 3 is with isolated solid particulate, and swirling eddy is limited in certain scope, and can determine their outflow direction, avoid isolated solid particulate to fill the air in whole space outerpace, solid particulate is by the inwall place of inertial motion to current limliting cover 3, simultaneously under the action of gravitation backspin turns to, along the inwall whereabouts of current limliting cover 3, discharge through dust discharge and stripped vapor entrance 8, current limliting cover 3 makes flowing of whole settling vessel space outerpace comparatively orderly simultaneously.Clean oil gas then directly enters vapor pipe 4, and then enters the top and revolve, and has greatly reduced the oil gas that enters outside settler space, and has significantly reduced the mean residence time of oil gas in settling vessel, thereby reduced the possibility of coking in the settling vessel; Vapor pipe 4 can have the reducing of certain angle, with control separation efficiency and pressure drop; The 5th, the stripped vapor entrance, the position that whole settling vessel pressure is minimum after implementing this syndeton is at vapor pipe 4 and stripped vapor entrance 5 places, the stripped vapor of settling vessel bottom stripping stage and and stripping oil gas out, a part can enter vapor pipe 4 by stripped vapor entrance 5, and then enter the top revolve, another part can be by dust discharge and stripped vapor entrance 8, and is connected separated space 7 through annular and enters vapor pipe 4, and then enters the top and revolve; Annular is connected separated space 7 by the spatial composing in the current limliting cover 3, and its shape is determined by shape and the position of current limliting cover 3, vapor pipe 4 and divergent segment 2; Dust discharge and stripped vapor entrance 8 have the function of dust discharge and gas steam-in concurrently, and isolated solid particulate is from discharging along current limliting cover 3 inwalls whereabouts here, and gas is then entering near near the space outer wall of divergent segment 2.Owing to be connected rotatablely moving in the separated space 7 in annular, stripped vapor and oil gas and isolated solid particulate can be realized staggered flowing, and the part stripped vapor of settling vessel master stripping stage and oil gas can be from entering vapor pipe 4 here.
Because particle falls along current limliting cover 3 inwalls, and stripped vapor is compared seldom with total tolerance, lower at reverse (radially inner) flow velocity that is connected separated space 6 interior air-flows, because strongly rotatablely moving of solid particulate, so solid particulate still can be discharged smoothly along current limliting cover 3 inwalls, stripped vapor then can enter vapor pipe 4 smoothly entering near near the space outer wall of divergent segment 2.All stripped vapor and stripping oil gas are out discharged settling vessel by vapor pipe 4 and stripped vapor entrance 5 these two places, enter the top by vapor pipe 4 and revolve.
In new Joining Structure, gas stream substantially is a straight tube from rotation incoming flow pipe 1 to vapor pipe 4 through the zone, and it is also little that caliber changes, so can not produce extra pressure drop.The rotation energy of gas and solid particulate is fully used in the incoming flow of rotation in the incoming flow pipe 1, therefore can under the condition of additional voltage drop the solid particulate in the air-flow be removed not having.Because the separation system internal space is connected separated space 7 with the space outerpace of settling vessel by annular and stripped vapor entrance 5 is interconnected, therefore whole separation system still has higher turndown ratio, can resist unexpected operation fluctuation.
This Novel connection type and member are actual to be a kind of Novel rotary incoming flow separator, it has formed is just revolving and is pushing up a kind of Novel connection type between revolving, and this mode of connection can make oil gas enter the top fully and revolve, and do not enter settler space, thereby suppress the coking in the settling vessel; Simultaneously, this mode of connection is under the condition without any additional energy consumption, granules of catalyst more than 70% in the oil gas can be removed, and can be with separate small (because enough settlement spaces be arranged), thereby can improve the separation efficiency of whole separation system, and can reduce solid content of oil slurry.
In the FCC course of processing, use cyclonic separator slightly to revolve or divide soon in the settling vessel that slightly revolves and to use the present invention, as long as cyclonic separator is slightly revolved or divide soon the outlet of slightly revolving directly to link to each other with the rotation incoming flow pipe 1 of Novel connection relay part.
Claims (8)
1. slightly revolve in the FCC settling vessel and Novel connection type and the member of top between revolving, be positioned at settling vessel shell (12) inside, by rotation incoming flow pipe (1), divergent segment (2), current limliting cover (3), vapor pipe (4), stripped vapor entrance (5), top buffering separated space (6), annular is connected separated space (7) and dust discharge and stripped vapor entrance (8) and forms, it is characterized in that: minor diameter one end of divergent segment (2) and rotation coaxial connection of incoming flow pipe (1), vapor pipe (4) and rotation incoming flow pipe (1), divergent segment (2) is concentric, vapor pipe (4) end gos deep into divergent segment (2) or in the outside of divergent segment (2), current limliting cover (3) is positioned at divergent segment (2) and vapor pipe (4) outside.
2. slightly revolve in the FCC settling vessel according to claim 1 and Novel connection type and the member of top between revolving, it is characterized in that: the coaxial pipeline that is connected in the vapor pipe of cyclonic separator or has the rotation dust-contained airflow of rotation incoming flow pipe (1), perhaps itself be exactly cyclonic separator vapor pipe or any other have the rotation dust-contained airflow pipeline, its diameter is D1, and its length is 0.5D1～200D1.
3. slightly revolve in the FCC settling vessel according to claim 1 and Novel connection type and the member of top between revolving, it is characterized in that: the cone segment length L0 of divergent segment (2) is 0.1D1～10D1, and enlarging diameter D2 is 0.5D1～5.0D1.
4. slightly revolve in the FCC settling vessel according to claim 1 and Novel connection type and the member of top between revolving, it is characterized in that: when vapor pipe (4) end goed deep into divergent segment (2), its depth of penetration was 0～5.0D1; When vapor pipe (4) end does not stretch into divergent segment (2), the distance L 1 of itself and divergent segment (2) enlarging place is 0～8.0D1, the degree of depth L5 that vapor pipe (4) inserts in the current limliting cover (3) is 0～10D1, and the diameter D3 of vapor pipe (4) and D4 are 0.3D1～2.5D1; When D3=D4, vapor pipe (4) is straight tube; When D3＜D4, vapor pipe (4) is with reducing, and the length L 2 of reducing part is 0.2D1～10D1.
5. slightly revolve in the FCC settling vessel according to claim 1 and Novel connection type and the member of top between revolving, it is characterized in that: the upper diameter D5 of current limliting cover (3) is 1.0D1～10D1, and its underpart diameter D6 and D7 are 1.0D1～15D1; When D6=D7, its underpart is cylindrical, and its upper height L3 is 0～8.0D1, and its underpart height L4 is 0～8.0D1; The inside of current limliting cover (3) makes fold-line-shaped or arc line shaped by interior lining, is beneficial to outside the flowing of particle.
6. slightly revolve in the FCC settling vessel according to claim 1 and Novel connection type and the member of top between revolving, it is characterized in that: stripped vapor entrance (5) is comprised of circumferential 2-20 the circular hole that is positioned on the vapor pipe (4), the diameter D8 of circular hole is 0.01D1～0.3D1, and the circumference at circular hole place is 0.1D1～5.0D1 to the distance L 6 on the upper edge of current limliting cover (3); The circular hole of stripped vapor entrance (5) is along on the same circular section on the short transverse or along the distribution straggly of circumference height, along circumferentially uniform or non-uniform.
7. slightly revolve in the FCC settling vessel according to claim 1 and Novel connection type and the member of top between revolving, it is characterized in that: annular is connected separated space (7) and is comprised of current limliting cover (3) internal space, its shape is determined by shape and the position of current limliting cover (3), vapor pipe (4) and divergent segment (2), distance L 1 between vapor pipe within it (4) and the divergent segment (2) is-5.0D1～8.0D1 that negative value represents that vapor pipe (4) gos deep into the degree of depth of divergent segment (2).
8. slightly revolve in the FCC settling vessel according to claim 1 and Novel connection type and the member of top between revolving, it is characterized in that: dust discharge and stripped vapor entrance (8) are positioned at the bottom of current limliting cover (3), its external diameter is exactly the diameter D7 of current limliting cover (3) bottom, and its internal diameter is the external diameter of rotation incoming flow pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220183391 CN202786134U (en) | 2012-04-26 | 2012-04-26 | Novel connection mode between coarse cyclone and top cyclone in fluid catalyst cracking (FCC) settler and components |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220183391 CN202786134U (en) | 2012-04-26 | 2012-04-26 | Novel connection mode between coarse cyclone and top cyclone in fluid catalyst cracking (FCC) settler and components |
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| CN202786134U true CN202786134U (en) | 2013-03-13 |
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| CN 201220183391 Expired - Fee Related CN202786134U (en) | 2012-04-26 | 2012-04-26 | Novel connection mode between coarse cyclone and top cyclone in fluid catalyst cracking (FCC) settler and components |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374381A (en) * | 2012-04-26 | 2013-10-30 | 中国石油大学(北京) | Novel connecting mode and component between rough rotator and top rotator in FCC disengager |
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2012
- 2012-04-26 CN CN 201220183391 patent/CN202786134U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374381A (en) * | 2012-04-26 | 2013-10-30 | 中国石油大学(北京) | Novel connecting mode and component between rough rotator and top rotator in FCC disengager |
| CN103374381B (en) * | 2012-04-26 | 2015-11-25 | 中国石油大学(北京) | Slightly revolve in FCC settling vessel and push up the syndeton between revolving |
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Granted publication date: 20130313 Termination date: 20160426 |