CN203095991U - Heavy oil catalysis settler for reducing coke - Google Patents
Heavy oil catalysis settler for reducing coke Download PDFInfo
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- CN203095991U CN203095991U CN 201320042717 CN201320042717U CN203095991U CN 203095991 U CN203095991 U CN 203095991U CN 201320042717 CN201320042717 CN 201320042717 CN 201320042717 U CN201320042717 U CN 201320042717U CN 203095991 U CN203095991 U CN 203095991U
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- settling vessel
- cyclone separator
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- heavy
- settler
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Abstract
The utility model relates to a heavy oil catalysis settler for reducing coke. The heavy oil catalysis settler for reducing coke comprises a settler body, a riser rough screwing inlet section, a rough/single cyclone separator and a steam stripping section, wherein the tail end of the riser rough screwing inlet section is connected with a rough cyclone separator and the riser rough screwing inlet section is used for conveying an oil, a gas and a catalyst, a communicated rough swing-lift gas pipe is arranged at the top of the rough cyclone separator, a communicated rough screwing dip leg is arranged at the bottom of the rough cyclone separator, and the tail end of the rough screwing dip leg is inserted into a material sealing tank arranged in the settler body. The outlet of the rough swing-lift gas pipe is opposite to the inlet section of a single-stage cyclone separator and the outlet of the rough swing-lift gas pipe and the inlet section of the single-stage cyclone separator are communicated in series and are in flexible connection in a gapped manner; and the top of the single-stage cyclone separator is connected with a settler gas collection chamber arranged at the upper part inside the settler body by virtue of a pipeline, a communicated single screwing dip leg arranged at the bottom of the single-stage cyclone separator is inserted to the lower part inside the settler body, a wing valve is arranged at the bottom end of the single screwing dip leg, and the upper part of the wing valve is higher than the top of the material sealing tank. The heavy oil catalysis settler for reducing coke is simple in structure and high in efficiency, so that effective separation between the oil and gas and the catalyst is realized, and an operating flexibility requirement is also reached.
Description
Technical field
The utility model is involved in petrochemical technology field oil-refining chemical processing unit, is specially a kind of heavy-oil catalytic settling vessel that reduces coking amount.
Background technology
Catalytic cracking (FCC) is a most important secondary processing process in China petroleum refining industry, its objective is to improve the level of crude oil processing and quality product, increases lightweight oil output.Continuous development along with catalytic cracking process and catalyst technology, fcc raw material oil is extended to residual oil, the coking problem that the stock oil heaviness causes heavy oil catalytically cracking equipment reacting-settler system, gas pipeline etc. to be located on the equipment internal surface is serious and general, and has become one of important hidden danger that influences the smooth running of catalytic cracking unit long period.If device take place unusual fluctuations (as charging interrupt suddenly, the vexed bed of revivifier etc.), coking piece in the settling vessel is in case come off, and the blocking catalyst circulation passage causes circulation not freely or interruption, catalyst stack less, be forced to the coke cleaning that stops until device, cause enormous economic loss to enterprise.
The oil gas coking is a complex physicochemical process.It is generally acknowledged that wet, heavy constituent in the oil gas are the roots that cause coking, flow condition, temperature distribution, the oil gas residence time and operating method etc. have material impact to coking in atomizing raw materials, the settling vessel.Because settler space is bigger, the mobile velocity ratio of oil gas is less, oil gas is long in the residence time of settlement space, and there is the oil gas flow dead, this secondary that not only can increase oil gas is crossed cracking reaction, also can increase simultaneously the condensation of heavy constituent in the oil gas, make the ratio that fluid drips in the oil gas rise, the possibility of oil gas coking increases.The coking material that generates is attached on settling vessel inwall and internals outside surface and constantly increases thickness, just forms the hidden danger of serious harm device long-term operation in the course of time.
Tradition settling vessel inside revolves singly slightly that thick spin material leg entrained oil tolerance reaches 6-12% in the type finish separation facilities, and contain a certain proportion of easy green coke material (heavy constituent), coking constantly during operation, and influence on-stream time, shut-down coke cleaning amount can be up to more than 100 tons.In order to solve the coking problem of settling vessel system, the researchist has proposed many relevant patents.Chinese patent ZL92112441.4, ZL96103419.X, U.S. Pat 5158669, European patent EP 0593827A1 etc. the riser reactor end slightly the portion of screwing off directly connected a pre-stripping segment, minimizing is shortened the residence time of reaction oil gas in settling vessel from the downward entrained oil tolerance of thick spin material leg.Chinese patent ZL98102166.2, ZL98204681.2 also change pre-stripping segment into the circulation sleeve, slightly revolve riser and are connected with the first mouthful spigot-and-socket airway that screws in.01228805.5 of Chinese patent has adopted the circular arc bend pipe of several downward-sloping certain angles to replace slightly revolving as the gas-solid quick disconnector at the riser tube end, and has added a seal bootr to realize drawing fast of oil gas in its outside.These patent emphasis all must be the sharp separation of terminal oil gas of riser tube and catalyzer, the oil gas that reduces the oil and gas content that enters settling vessel bottom stripping stage down and slightly revolve the riser rising is derived settling vessel fast, but owing under enter in the oil gas of stripping stage heavy constituent and after leaving the gas solid separation facility, still fail in a large number to be converted into coke and make progress and flow at catalyst surface, need just to enter single whiz and drive settling vessel through whole settler space, the residence time is longer, can reach tens seconds, be easy to generate coking, along with the device lengthening of on-stream time, still coking can take place in the settling vessel.Chinese patent ZL200910180443.2 will slightly revolve and singly revolve and change the direct connection structure into, drainage tube is set the oil gas in the settler space is drawn settling vessel fast.This patent is not from reducing the reorganization component in the settler space oil and gas content, particularly oil gas, settling vessel internal structure complexity.
Summary of the invention
The purpose of this utility model is improved and is innovated at the shortcoming that exists in the background technology and problem, a kind of catalytic cracking unit unplanned shutdown accident that can reduce or avoid causing because of coking is provided, eliminate coking to installing the harm that stable long period is produced, can effectively reduce the heavy-oil catalytic settling vessel of the minimizing coking amount of heavy oil fluid catalytic cracking settler equipment wall coking amount again.
A kind of settling vessel body that comprises of the utility model structure, be arranged on settling vessel body one side, slightly revolve entrance with riser tube that oil gas is connected with the catalyzer input tube, be arranged on intrinsic thick cyclonic separator of settling vessel and single stage cyclone separator, and be arranged on the heavy-oil catalytic settling vessel of the stripping stage of settling vessel body bottom, wherein:
Riser tube revolves slightly that entrance is terminal to be connected with cyclonic separator slightly and to carry oil gas and catalyzer, thick cyclonic separator top be provided with communicate slightly revolve riser, the bottom is provided with the thick spin material leg that communicates, and the end of thick spin material leg inserts in the material envelope pond that is provided with in the settling vessel body.
Describedly slightly revolve riser outlet and communicate, and slightly to revolve riser and entrance be gappedly to be flexible coupling over against the entrance parallel-series of single stage cyclone separator; Described single stage cyclone separator top is arranged on the settling vessel collection chamber of settling vessel body internal upper part by pipe connection, single stage cyclone separator bottom is provided with the single spin material leg that communicates and extends bottom in the settling vessel body, wherein the bottom of single spin material leg is provided with flutter valve, and the top absolute altitude of flutter valve is lower than the top in material envelope pond.
The utlity model has following advantage and beneficial effect:
1, the utility model reduces settler space oil gas total amount significantly by material envelope pond shutoff oil gas, and transforms the wherein easily heavy constituent of coking.
2, the utility model is emphasized the position relation of single rotor valve with material envelope pond, avoids the coking of flutter valve inner dead space and causes losing efficacy.
3, the utility model is from watershed management, and is easy to implement.
4, the utility model is simple in structure efficient, has both satisfied oil gas and the effective of catalyzer separates, and has guaranteed the turndown ratio requirement again.
Description of drawings
Fig. 1 is the utility model one-piece construction synoptic diagram.
Fig. 2 is one of the structural representation in the utility model material envelope pond.
Fig. 3 be the utility model material envelope pond structural representation two.
Fig. 4 is one of the utility model material envelope pond base plate vertical view.
Fig. 5 is two of the utility model material envelope pond base plate vertical view
Embodiment
By Fig. 1 to 5 as can be known, the utility model comprises the settling vessel body, be arranged on settling vessel body one side, slightly revolve entrance 1 with riser tube that oil gas is connected with the catalyzer input tube, be arranged on intrinsic thick cyclonic separator 2 of settling vessel and single stage cyclone separator 6, and be arranged on the stripping stage 13 of settling vessel body bottom, wherein:
Riser tube revolves slightly that entrance 1 is terminal to be connected with cyclonic separator 2 slightly and to carry oil gas and catalyzer, thick cyclonic separator 2 tops be provided with communicate slightly revolve riser 3, the bottom is provided with the thick spin material leg 10 that communicates, and the end of thick spin material leg 10 inserts in the material envelope pond 9 that is provided with in the settling vessel body;
Describedly slightly revolve riser 3 outlet and communicate, and slightly revolve riser 3 and be flexible coupling for gapped with single-stage cyclone separator entrance 4 over against entrance 4 parallel-seriess of single stage cyclone separator 6; Described single stage cyclone separator 6 tops are arranged on the settling vessel collection chamber 12 of settling vessel body internal upper part by pipe connection, single stage cyclone separator 6 bottoms are provided with the single spin material leg 7 that communicates and extend bottom in the settling vessel body, the bottom of wherein single spin material leg 7 is provided with flutter valve 8, and the top absolute altitude of flutter valve 8 is lower than the top in material envelope pond 9.
Material described in the utility model envelope pond 9 is fixed on settling vessel inner body wall middle and lower part, for around the uncovered structure formed of side plate and base plate, wherein material envelope pond 9 inwalls are wear resistance lining, have one or at least two logical steam vents on 9 base plates of material envelope pond.Be provided with the loosening steam ring 11 of logical steam in the described material envelope pond 9, and the density of catalyst that steam feeding amount satisfies in the thick spin material leg 10 is in 400-1000kg/m
3One group or the anti-scorch steam ring 5 of at least two groups are set in the described settling vessel collection chamber 12, and anti-scorch steam ring 5 uperizes from top to bottom intercept oil gas to the settling vessel top, describedly respectively organize anti-scorch steam ring 5 and are arranged horizontally.Described single stage cyclone separator 6 can be arranged in parallel at least two and communicate with thick cyclonic separator 2.Described single spin material leg 7 is vertical to connect single stage cyclone separator 6 and flutter valves 8, and flutter valve 8 is installed in the position that the catalyzer that overflows in single spin material leg 7 terminal material envelope ponds 9 can partly drop to.Described material envelope pond 9 is for being designed to circle, and is perhaps semicircle, perhaps Polygons.Described thick spin material leg 10 upper/lower terminals are that the vertical ducting connection or the thick cyclonic separator 2 that is flexible coupling are expected envelope pond 9 with inserting, and the middle part is an inclined tube, and wherein the lower end insertion expects that the degree of depth in envelope pond 9 is a 0.2-1 rice.The described gap that is flexible coupling of riser 3 and single-stage cyclone separator entrance 4 of slightly revolving is less than 100mm.
Structural principle of the present utility model:
The utility model comprises thick cyclonic separator, single stage cyclone separator, stripping stage, anti-scorch steam ring, material envelope pond and settling vessel, wherein the riser tube end that slightly revolves entrance links to each other with thick cyclonic separator, and thick cyclonic separator slightly revolve riser outlet and single stage cyclone separator inlet over against and close to each other, for being flexible coupling of certain interval arranged.Material envelope pond is arranged on the settling vessel middle and lower part, the thick spin material leg in thick cyclonic separator below is terminal to be inserted in the material envelope pond, depth of penetration is a 0.2-1 rice, loosening steam ring is set at the bottom of the pond feeds the superheated vapour that is not less than 250 ℃, and steam feeding amount satisfies thick spin material leg inner catalyst density and is in 400-1000kg/m
3The uncovered structure that material envelope pond is welded by sidewall and base plate, inwall lays wear resistance lining, and base plate has one or several apertures, even the perforate total area satisfies the minimum load operating mode, material envelope pond still keeps the catalyzer overflow situation.The single stage cyclone separator connects the interior or outer settling vessel collection chamber at settling vessel top, and the terminal flutter valve of single spin material leg top absolute altitude is lower than material envelope pond,, the flutter valve installation site can be satisfied to expect to seal under the catalyst member that the pond overflows and dropped on the flutter valve surface.The settler space top is provided with anti-scorch steam ring and feeds the superheated vapour that is not less than 250 ℃.
Principle of work of the present utility model:
Riser tube slightly revolves the oil gas of entrance end and catalyzer and enters thick cyclonic separator and carry out gas solid separation fast, and most of oil gas and the catalyzer carried secretly on a small quantity enter the single stage cyclone separator and make further gas solid separation through slightly revolving after riser is drawn.Three remaining part oil gas: total 1, the oil gas that enters the settling vessel bottom with thick spin material leg malleation discharge accounts for and enter 6～12% of thick cyclonic separator oil and gas content; 2, single spin material leg enters the oil gas of settling vessel bottom because its amount of the effect of flutter valve is few; 3, a catalyst particles intergranular and an oil gas that the material endoporus is carried secretly, adsorbed are come out by steam conversion stripping at stripping stage; This three parts oil gas all enters settler space from the settling vessel bottom.They all move upward lentamente through settler space in the tradition settling vessel, arrive the settling vessel top at last from singly revolving the discharge settling vessel, and oil gas residence time in settlement space is long, causes a large amount of cokings.The utility model inserts thick spin material leg in the material envelope pond, feeds an amount of steam and becomes flexible, and makes the dipleg inner catalyst present the high-density feature, and density reaches 400～1000kg/m
3Rate of catalyst flow is slow, between particle or the endoporus oil and gas content carrying secretly, adsorb significantly reduce, and heavy constituent wherein further transform under this temperature condition, generate sedimentation of coke at catalyst surface, the coking degree greatly alleviated after the oil gas that removes heavy constituent substantially entered settler space.For satisfy single rotor valve not by a small amount of oil gas in the coking of valve bonnet inner accumulated, the flutter valve absolute altitude is lower than material Feng Chi top to be provided with, the granules of catalyst that material envelope Chi Kou overflows partly falls into the flutter valve surface, and it is had souring, guarantees that further flutter valve valve bonnet inside do not lose efficacy because of coking.Heavy constituent also almost transform and finish in the oil gas that the utility model stripping stage is come out by stripping, no longer have the coking feature, and upwards oil gas is drawn settling vessel through slightly revolving and singly revolving after a gap and main oil gas converge.
Specific embodiment of the utility model:
As shown in Figure 1, the oil gas that slightly revolves entrance 1 end from riser tube is introduced in the thick cyclonic separator 2 with catalyzer and separates, and the catalyzer of the overwhelming majority is subjected to action of centrifugal force and enters material envelope pond 9 and fall into the settling vessel bottom from expecting that envelope 9 tops, pond are overflowed along thick spin material leg 10 under separated in thick cyclonic separator 2.Slightly revolving isolating oil gas carries little amount of catalyst secretly and enters in the single stage cyclone separator 6 further and separate by slightly revolving riser 3; The oil gas that singly revolves the riser discharge enters settling vessel collection chamber 12, finally discharges settling vessel; The catalyzer that the single stage cyclone separator separates is then got back to the settling vessel bottom through single spin material leg 7 and terminal flutter valve 8 thereof.Settling vessel pushes up anti-scorch steam ring 5 steam is sprayed into the settling vessel top, from top to bottom intercepts oil gas, makes in the settling vessel that oil gas can only the gap enters between riser 3 and the single-stage cyclone separator entrance 4 from slightly revolving.Slightly revolve between riser 3 and the single-stage cyclone separator entrance 4 gap usually less than 100mm, can satisfy the steam that oil gas, little amount of catalyst, anti-scorch steam ring 5 that thick spin material leg discharges discharge and slowly be risen from the settling vessel bottom by the oil gas that steam cements out, through the certain altitude sedimentation with cushion thus the gap and enter and get final product with stripping stage.
The utility model has been connected and has slightly been revolved and singly revolve the two stage cyclone separator, and the separation efficiency of oil gas and catalyzer can reach more than 99.99%, the sharp separation of realization oil gas and catalyzer.Material envelope pond inner catalyst keeps flowing under the loosening condition of the small amount of steam that loosening steam ring spray goes out, but density of catalyst can keep 400-1000kg/m
3, the oil and gas content that the dipleg dipleg is discharged reduces to less than 1%.Single spin material leg flutter valve is not higher than material Feng Chi upper edge topmost, but not under, keep little amount of catalyst continuous erosion valve body, prevent that a small amount of oil gas from accumulating in the coking of valve bonnet inner dead space for a long time.
Before certain 1,000,000 tons of/year heavy oil catalytically cracking equipment settling vessel adopts anti-coking technological transformation of the present utility model, move 2 years coking total amounts and reach about 100 tons, wherein unplanned shutdown has once caused massive losses to enterprise.After adopting the utility model technological transformation, the lost-time acident that coking causes does not take place in the continuous long-time running of this covering device, and coking amount is less than 5 tons, realizes stable long production, remarkable in economical benefits.
Adopt the utility model technology, total arrangement to separation system in the existing settling vessel changes little, only need to increase material envelope pond, shorten material spin material leg length or change inclined tube into, increase the inner loosening steam ring in material envelope pond, compact construction, can guarantee that settling vessel steady running is more than 3 years, overall coking amount significantly reduces, and can similarly be applicable on the catalytic cracking unit.
Embodiment described in the utility model only is the description that preferred implementation of the present utility model is carried out; be not that the utility model design and scope are limited; under the prerequisite that does not break away from the utility model design philosophy; engineering technical personnel make the technical solution of the utility model in this area various modification and improvement; all should fall into protection domain of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.
Claims (9)
1.
OnePlant the heavy-oil catalytic settling vessel that reduces coking amount, comprise the settling vessel body, be arranged on settling vessel body one side, slightly revolve entrance (1) with riser tube that oil gas is connected with the catalyzer input tube, be arranged on intrinsic thick cyclonic separator of settling vessel (2) and single stage cyclone separator (6), and be arranged on the stripping stage (13) of settling vessel body bottom, it is characterized in that:
Riser tube revolves slightly that entrance (1) is terminal to be connected with cyclonic separator (2) slightly and to carry oil gas and catalyzer, thick cyclonic separator (2) top be provided with communicate slightly revolve riser (3), the bottom is provided with the thick spin material leg (10) that communicates, and the end of thick spin material leg (10) inserts in the material envelope pond (9) that is provided with in the settling vessel body;
Describedly slightly revolve riser (3) outlet and communicate, and (3) are flexible coupling for gapped with entrance (4) slightly to revolve riser over against entrance (4) parallel-series of single stage cyclone separator (6); Described single stage cyclone separator (6) top is arranged on the settling vessel collection chamber (12) of settling vessel body internal upper part by pipe connection, single stage cyclone separator (6) bottom is provided with the single spin material leg (7) that communicates and extends bottom in the settling vessel body, the bottom of wherein single spin material leg (7) is provided with flutter valve (8), and the top absolute altitude of flutter valve (8) is lower than the top in material envelope pond (9).
2. the heavy-oil catalytic settling vessel of minimizing coking amount according to claim 1, it is characterized in that described material envelope pond (9) is fixed on settling vessel inner body wall middle and lower part, for around the uncovered structure formed of side plate and base plate, wherein material envelope pond (9) inwall is a wear resistance lining, has one or at least two logical steam vents on the base plate of material envelope pond (9).
3. the heavy-oil catalytic settling vessel of minimizing coking amount according to claim 1, it is characterized in that being provided with in the described material envelope pond (9) the loosening steam ring (11) of logical steam, and the density of catalyst that steam feeding amount satisfies in the thick spin material leg (10) is in 400-1000kg/m
3
4. the heavy-oil catalytic settling vessel of minimizing coking amount according to claim 1, it is characterized in that being provided with in the described settling vessel collection chamber (12) one group or the anti-scorch steam rings of at least two groups (5), anti-scorch steam ring (5) uperize from top to bottom intercepts oil gas to the settling vessel top, and the described anti-scorch steam ring (5) of respectively organizing is arranged horizontally.
5. the heavy-oil catalytic settling vessel of minimizing coking amount according to claim 1 is characterized in that described single stage cyclone separator (6) can be arranged in parallel at least two and communicate with thick cyclonic separator (2).
6. the heavy-oil catalytic settling vessel of minimizing coking amount according to claim 1, it is characterized in that described single spin material leg (7) vertically connects single stage cyclone separator (6) and flutter valve (8), and flutter valve (8) is installed in the position that the catalyzer that overflows in the terminal material envelope pond of single spin material leg (7) (9) can partly drop to.
7. the heavy-oil catalytic settling vessel of minimizing coking amount according to claim 1 is characterized in that described material envelope pond (9) for being designed to circle, and is perhaps semicircle, perhaps Polygons.
8. the heavy-oil catalytic settling vessel of minimizing coking amount according to claim 1, it is characterized in that described thick spin material leg (10) upper/lower terminal is that vertical ducting connects and insertion material envelope pond (9), the middle part is an inclined tube, and wherein the lower end is inserted and expected that the degree of depth of sealing pond (9) is no less than 0.2-1 rice.
9. the heavy-oil catalytic settling vessel of minimizing coking amount according to claim 1 is characterized in that the described gap that is flexible coupling of riser (3) and entrance (4) of slightly revolving is less than 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320042717 CN203095991U (en) | 2013-01-28 | 2013-01-28 | Heavy oil catalysis settler for reducing coke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320042717 CN203095991U (en) | 2013-01-28 | 2013-01-28 | Heavy oil catalysis settler for reducing coke |
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| Publication Number | Publication Date |
|---|---|
| CN203095991U true CN203095991U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320042717 Expired - Lifetime CN203095991U (en) | 2013-01-28 | 2013-01-28 | Heavy oil catalysis settler for reducing coke |
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| Country | Link |
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| CN (1) | CN203095991U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108237024A (en) * | 2017-12-28 | 2018-07-03 | 陕西延长石油（集团）有限责任公司 | A kind of two stage cyclone separator |
| CN110523144A (en) * | 2018-05-23 | 2019-12-03 | 中石化广州工程有限公司 | A kind of anti-coking settler and anti-coking method |
-
2013
- 2013-01-28 CN CN 201320042717 patent/CN203095991U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108237024A (en) * | 2017-12-28 | 2018-07-03 | 陕西延长石油（集团）有限责任公司 | A kind of two stage cyclone separator |
| CN110523144A (en) * | 2018-05-23 | 2019-12-03 | 中石化广州工程有限公司 | A kind of anti-coking settler and anti-coking method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |
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| CX01 | Expiry of patent term |