CN105062561B - The device of catalyst cracker anti-coking and the method for anti-coking - Google Patents
The device of catalyst cracker anti-coking and the method for anti-coking Download PDFInfo
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- CN105062561B CN105062561B CN201510419254.1A CN201510419254A CN105062561B CN 105062561 B CN105062561 B CN 105062561B CN 201510419254 A CN201510419254 A CN 201510419254A CN 105062561 B CN105062561 B CN 105062561B
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- steam
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- gas pipeline
- coking
- export
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Abstract
The invention discloses a kind of device of catalyst cracker anti-coking, including oil-gas pipeline and steam loop, steam loop is arranged on the outer wall of oil-gas pipeline, and the internal diameter of oil-gas pipeline gradually increases from arrival end to the port of export, and air inlet pipe is provided with the outer surface of steam loop.The invention also discloses the method for catalyst cracker anti-coking, i.e. before the reactor for adding the raw material into catalyst cracker, inject anti-scorch steam in from air inlet pipe to steam loop, the time of anti-scorch steam injection and the Fractionator Bottom stirring steam of catalyst cracker to be passed through the time identical.The present invention can suitably reduce the speed at oil gas vent end by the oil-gas pipeline gradually opened, steam loop is being installed at a certain distance from oil gas vent end simultaneously, superheated steam is sprayed at a high speed by endless tube, form steam screen, parcel gas stream, and the vortex of port of export pipe end is destroyed, so as to suppress the coking of the pipeline port of export.And the high speed impact power of steam also can effectively prevent the coking of pipeline outlet end.
Description
Technical field
The invention belongs to technical field of petroleum machinery, and in particular to a kind of device of catalyst cracker anti-coking, this hair
The bright method for further relating to catalyst cracker anti-coking.
Background technology
Catalyst cracker is the important production unit of oil-processing enterprises Integrated Refinery And Petrochemical development, bears oil product lightweight
Change and obtain the important task of industrial chemicals.Catalyst cracker long period oepration at full load, the benefit growth to Petrochemical Enterprises is played
Very important effect.But, closely fcc raw material heaviness, i.e. high density, high viscosity, the trend of C/Hratio high day during the last ten years
It is increasingly acute, therefore catalytic unit is inevitably faced with the tired of riser reactor, settler and reaction oil gas system coking
Disturb, because capacity of equipment reduction, unplanned shutdown and production safety problem are extremely serious caused by coking.Investigation finds reaction oil
The problem of coking is especially serious at the gas pipeline port of export, there is the main cause of coking at the oil-gas pipeline port of export：Catalytic Cracking Unit of Measure
Answer in oil gas in addition to the gaseous matter lower than feedstock oil hydrocarbon molecules amount, objectively also there is a small amount of high boiling component, very
Easily condensation forms burnt core, while can also produce double, polyene and unsaturated polycyclic macromolecule virtue during catalytic cracking reaction
The condensation product and polymeric reaction product of hydrocarbon, these heavy reaction products together with the high boiling component do not reacted in raw material all
The formation of coke can be caused.Although into oil-gas pipeline reaction oil gas in pipeline residence time it is very short, it is at this
It is in temperature-fall period in time, the material with high green coke factor is with the reduction of temperature, and green coke speed is also faster.Reaction
Substantial amounts of water vapour and catalyst fines particle are also included in oil gas, the presence of high-temperature vapor reduces hydrocarbon-type oil qi leel
Pressure, is advantageous for reducing coking, but condense in the burnt meeting on fine powder catalyst particle as the bigger coke of core formation
Grain, permanent set is at In Oil-gas Line inner outlet end.The focus layer of the oil-gas pipeline port of export is very hard, be difficult to because of hard by
Gas stream is destroyed, therefore focus layer will be more and more thick, until reaching oil gas flow velocity increases to limit that its coking layer is difficult to thicken flat
Weighing apparatus state.High-temperature oil gas can form vortex before entering fractionating column at the oil-gas pipeline port of export, and the oil gas speed in vortex is low, stops
Stay the time long, additionally, due to gas enter fractionating column when adiabatic expansion, during gas expansion energy conversion will make oil gas
Temperature decreases, and oil gas partial pressure declines rapidly while temperature reduction, and this will promote the high boiling component condensation in oil gas to go out
Come, be one of principal element of coking.Shunk because vortex is always extruded towards fluid center, coke button at the oil-gas pipeline port of export
Formation, also always finally just grow up to a focus layer of " loudspeaker " shape in pipe end since the pipe end and gradually to growing up in pipe,
Thickness of coke layer, typically in 20~30mm.Along with coking, oil-gas pipeline port of export area constantly diminishes, and coking is seriously located
Pipe cross-sectional product even can reduce 90% or so.Coking can not only influence the operational effect of device at the oil-gas pipeline port of export,
The shut-down of device is resulted even in when serious.
The content of the invention
It is an object of the invention to provide a kind of device of catalyst cracker anti-coking, solve to be tied at the oil-gas pipeline port of export
Burnt phenomenon is serious, the problem of influence catalyst cracker operation.
It is a further object of the present invention to provide the method for catalyst cracker anti-coking.
The technical solution adopted in the present invention is：The device of catalyst cracker anti-coking, including oil-gas pipeline and steam
Endless tube, steam loop is arranged on the outer wall of oil-gas pipeline, and the internal diameter of oil-gas pipeline gradually increases from arrival end to the port of export,
The outer surface of steam loop is provided with air inlet pipe.
The features of the present invention is also resided in：
Annular slab is connected with the inside of steam loop, annular slab stretches out the end face of steam loop, and annular slab is near oil gas
It is gradually thinning on the direction at pipeline outlet end, it is tangent with annular slab near one section of arrival end in oil-gas pipeline, in oil-gas pipeline
One section near the port of export is parallel with annular slab and there is gap between annular slab；Go out near oil-gas pipeline in steam loop
Uniform some through holes on the end face at mouth end, the center line of through hole is parallel with annular slab.
The center line of steam loop is 70~120mm with the port of export distance of oil-gas pipeline.
The side of oil-gas pipeline longitudinal section and the angle of horizontal direction are 2.5 ° -3.5 °.
The material of steam loop is 0Cr18Ni9, and wall thickness is 3mm.
Another technical scheme of the present invention is：
The method of catalyst cracker anti-coking, the coking device structure for being used is as follows：Including oil-gas pipeline and steaming
Vapour endless tube, steam loop is arranged on the outer wall of oil-gas pipeline, and the internal diameter of oil-gas pipeline gradually increases from arrival end to the port of export,
Air inlet pipe is installed in the outer surface of steam loop；
Specifically implementation steps are：
Before the reactor for adding the raw material into catalyst cracker, from air inlet pipe to steam loop in inject anti-scorch steaming
Vapour, the time of anti-scorch steam injection and the Fractionator Bottom stirring steam of catalyst cracker are passed through that the time is identical, i.e. completion is urged
Change the anti-coking in cracker oil-gas pipeline exit.
The characteristics of another technical scheme of the invention, also resides in：
Anti-scorch steam is the superheated steam of temperature >=400 DEG C, and the consumption of anti-scorch steam is 150~1000kg/h.
The beneficial effects of the invention are as follows：The present invention can suitably reduce the speed at oil gas vent end by the oil-gas pipeline gradually opened
Degree, while installing steam loop at a certain distance from oil gas vent end, superheated steam is sprayed at a high speed by endless tube, forms steam
Screen, wraps up gas stream, and destroys the vortex of port of export pipe end, so as to suppress the coking of the pipeline port of export.And the height of steam
Fast impulsive force also can effectively prevent the coking of pipeline outlet end.
Brief description of the drawings
Fig. 1 is the structural representation of the device of catalyst cracker anti-coking of the present invention；
Fig. 2 is the enlarged drawing of label part A in Fig. 1.
In figure, 1. steam loop, 2. annular slab, 3. air inlet pipe, 4. oil-gas pipeline, 5. through hole.
Specific embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
The apparatus structure of catalyst cracker anti-coking of the present invention is as shown in Figure 1 and Figure 2：Including oil-gas pipeline 4 and steam ring
Pipe 1, steam loop 1 is arranged on the outer wall of oil-gas pipeline 4, the center line of steam loop 1 and the port of export distance of oil-gas pipeline 4
It is 70~120mm, the internal diameter of oil-gas pipeline 4 gradually increases from arrival end to the port of export, the side of its longitudinal section and horizontal direction
Angle be 2.5 ° -3.5 °.The inner side of steam loop 1 is connected with annular slab 2, and annular slab 2 is stretched out in steam loop 1 near oil gas
The end face of the port of export of pipeline 4, and this section for stretching out is gradually thinning on the direction of the port of export of oil-gas pipeline 4.Oil gas
Pipeline 4, for boundary is divided into two sections, wherein one section near arrival end tangent with annular slab 2, is close to the one of the port of export with steam loop 1
Section is parallel with annular slab 2 and there is gap between annular slab 2.The end face of the port of export of oil-gas pipeline 4 is close in steam loop 1
The through hole 5 of upper uniform several a diameter of 3mm or so, the center line of through hole 5 is parallel with annular slab 2, and away from annular slab 2 it is more near more
It is good.The material of steam loop 1 is 0Cr18Ni9, and wall thickness is 3mm.Air inlet pipe 3 is installed in the outer surface of steam loop 1.
Anti-coking method of the invention is specifically implemented according to following steps：Adding the raw material into the anti-of catalyst cracker
Before answering device, from air inlet pipe 3 to steam loop 1 in inject anti-scorch steam, the time of anti-scorch steam injection and catalyst cracker
Fractionator Bottom stirring steam to be passed through the time identical.Anti-scorch steam in the internal circulation flow of whole steam loop 1, and from through hole
Sprayed at 5, the steam of ejection produces high speed impact power and forms steam screen by gradually thinning annular slab 2, wraps up from oil
The gas stream passed through in gas pipeline 4, and destroy the vortex of the port of export of oil-gas pipeline 4, that is, complete the anti-coking of catalyst cracker.
Anti-scorch steam is the superheated steam of temperature >=400 DEG C, the consumption of anti-scorch steam is 150~1000kg/h, about inlet amount
1%.
Equipment therefor of the present invention is installed at the pipe string before fractionating column, and specific installation site is according to oil gas pipe diameter size
Determine with steam loop installation place oil gas flow velocity.The method of the present invention is simple and easy to apply, and anti-coking works well.
Claims (3)
1. the device of catalyst cracker anti-coking, it is characterised in that including oil-gas pipeline (4) and steam loop (1), steam ring
On the outer wall of oil-gas pipeline (4), the internal diameter of oil-gas pipeline (4) gradually increases pipe (1) from arrival end to the port of export, is steaming
The outer surface of vapour endless tube (1) is provided with air inlet pipe (3)；Annular slab (2), annular slab are connected with the inside of the steam loop (1)
(2) end face of steam loop (1) is stretched out, annular slab (2) is in gradually thinning on the direction of oil-gas pipeline (4) port of export, oil
It is tangent with annular slab (2) near one section of arrival end in gas pipeline (4), near one section and ring of the port of export in oil-gas pipeline (4)
Shape plate (2) is parallel and there is gap between annular slab (2)；In steam loop (1) near the end of oil-gas pipeline (4) port of export
Uniform some through holes (5) on face, the center line of through hole (5) is parallel with annular slab (2)；The center line of the steam loop (1) with
The port of export distance of oil-gas pipeline (4) is 70~120mm；The side of oil-gas pipeline (4) longitudinal section and the folder of horizontal direction
Angle is 2.5 ° -3.5 °.
2. the device of catalyst cracker anti-coking according to claim 1, it is characterised in that the steam loop (1)
Material be 0Cr18Ni9, wall thickness is 3mm.
3. the method for catalyst cracker anti-coking, it is characterised in that the catalyst cracker described in usage right requirement 1 or 2
The device of anti-coking, specific implementation steps are：
Before the reactor for adding the raw material into catalyst cracker, from air inlet pipe (3) to steam loop (1), interior injection is anti-scorch
Steam, the time of anti-scorch steam injection and the Fractionator Bottom stirring steam of catalyst cracker to be passed through the time identical, that is, complete
The anti-coking in catalyst cracker oil-gas pipeline exit；Described anti-scorch steam is the superheated steam of temperature >=400 DEG C, anti-scorch
The consumption of steam is 150~1000kg/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510419254.1A CN105062561B (en) | 2015-07-16 | 2015-07-16 | The device of catalyst cracker anti-coking and the method for anti-coking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510419254.1A CN105062561B (en) | 2015-07-16 | 2015-07-16 | The device of catalyst cracker anti-coking and the method for anti-coking |
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| CN105062561A CN105062561A (en) | 2015-11-18 |
| CN105062561B true CN105062561B (en) | 2017-06-16 |
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| CN107227168A (en) * | 2017-07-18 | 2017-10-03 | 新乡市华音再生能源设备有限公司 | The application of steam-stirring formula rectifying furnace and steam in crude oil rectifying furnace coking is prevented |
| CN116850914B (en) * | 2023-09-04 | 2023-12-05 | 江苏博颂能源科技有限公司 | Propane dehydrogenation device reactor roof prevents burnt steam ring |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925196A (en) * | 2012-09-28 | 2013-02-13 | 沈阳石蜡化工有限公司 | Anti-coking device for high-temperature pyrolysis gas inlet of oil gas quench cooler |
| CN104388113A (en) * | 2014-11-04 | 2015-03-04 | 中国石油化工股份有限公司 | Anti-coking steam circular pipe capable of reducing coking of catalytic cracking settler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090127161A1 (en) * | 2007-11-19 | 2009-05-21 | Haizmann Robert S | Process and Apparatus for Integrated Heavy Oil Upgrading |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925196A (en) * | 2012-09-28 | 2013-02-13 | 沈阳石蜡化工有限公司 | Anti-coking device for high-temperature pyrolysis gas inlet of oil gas quench cooler |
| CN104388113A (en) * | 2014-11-04 | 2015-03-04 | 中国石油化工股份有限公司 | Anti-coking steam circular pipe capable of reducing coking of catalytic cracking settler |
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