CN206996619U - A kind of catalytic cracked regenerated system - Google Patents
A kind of catalytic cracked regenerated system Download PDFInfo
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- CN206996619U CN206996619U CN201720417929.3U CN201720417929U CN206996619U CN 206996619 U CN206996619 U CN 206996619U CN 201720417929 U CN201720417929 U CN 201720417929U CN 206996619 U CN206996619 U CN 206996619U
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Abstract
The utility model discloses a kind of catalytic cracked regenerated system, including：Main air duct；Oxygen channel；Oxygen controller, connected with oxygen channel；Oxygen distribution ware, connected with oxygen channel, in main air duct, oxygen is distributed oxygen-enriched main wind air is obtained into main air duct；The one-level Regenerative beds regenerated to reclaimable catalyst, one entrance connect with main air duct, and another entrance is used to add reclaimable catalyst；Main air distributor, in one-level Regenerative beds, oxygen-enriched main wind air is distributed in one-level Regenerative beds；Secondary regenerator bed, connected with one-level Regenerative beds；Separate the cyclone separator of regenerated catalyst；External warmer, connected with one-level Regenerative beds and secondary regenerator bed.Catalytic cracked regenerated system of the present utility model can between the gas-solid of intensifying regenerating bed mass transfer, improve the coke burning degree of oxygen utilization rate and Regenerative beds, improve device disposal ability, reduce the cost of investment of regenerative system and flue gas system.
Description
Technical field
Catalyst regeneration techniques field in crude oil secondary operation is the utility model is related to, espespecially a kind of catalytic cracked regenerated system
System.
Background technology
Catalytic cracking (FCC, Riser Catalytic Cracking) is most important in crude oil in China secondary operation adds
Work process, it is the main means of production of liquefied petroleum gas, gasoline, kerosene and diesel oil, very important ground is occupied in oil plant
Position.
Catalytic cracking is that heavy oil feedstock makes mink cell focus that cracking reaction occur in the presence of high temperature and catalyst, is changed into and splits
Change the process of the light-end products such as gas, gasoline and diesel oil.In catalytic cracking process, raw material can partly be sent out while cracking
Raw condensation reaction generation coke, deposition on the surface of the catalyst, cause the activity decrease of catalyst, it is necessary to by burning again
It is raw, could activity recovery.So catalytic cracking includes two technique mistakes of cyclic regeneration of the continuous cracking and catalyst of feedstock oil
Journey, in the reactor heavy raw oil recur cracking reaction, in a regenerator, continuous catalyst regenerating, catalyst passes through
Pressure difference continuous conveying between two devices.The power of regeneration and regeneration effect of the catalyst of regenerator directly affect the production of catalytic cracking
Can be with oil product yield and selectivity.The completely burned regeneration techniques generally used at present, uses air as combustion-supporting medium, exists
The defects of exhaust gas volumn is big, and oxygen content is high in flue gas, and coefficient of oxygen utilization is low, and flue gas system investment is high, and regenerator coke burning degree is low.
Therefore, the applicant is directed to providing a kind of new catalytic cracked regenerated system.
Utility model content
The purpose of this utility model is to provide a kind of catalytic cracked regenerated system, and it can be passed with the gas-solid of intensifying regenerating bed
Matter, improve the coke burning degree of oxygen utilization rate and Regenerative beds, reduce exhaust gas volumn, improve unit capacity, reduce regenerator and
The cost of investment of flue gas system.
In order to solve the above technical problems, the utility model provides a kind of catalytic cracked regenerated system, including：Air main
Road, for conveying main wind air；Oxygen channel, connected with the main air duct, for conveying oxygen to the main air duct；Oxygen
Airgun controller, on the oxygen channel, for adjusting the pressure and flow of oxygen；Oxygen distribution ware, it is arranged on the oxygen
Feed channel and the connectivity part of the main air duct, oxygen-enriched main wind air is obtained for oxygen to be evenly distributed in main wind；One-level
Regenerative beds, including first entrance and second entrance, the first entrance connect with the main air duct, and the second entrance is used for
Reclaimable catalyst is added, the one-level Regenerative beds are used to carry out one-level regeneration to reclaimable catalyst；Main air distributor, it is arranged on institute
State in one-level Regenerative beds, the outlet with the main air duct, for oxygen-enriched main wind air to be evenly distributed into the one-level
In Regenerative beds；Secondary regenerator bed, connected with the one-level Regenerative beds, two level is carried out again for the catalyst after being regenerated to one-level
It is raw；Cyclone separator, it is arranged in the secondary regenerator bed, for separating and recovering the catalyst in flue gas；External warmer, respectively
Connected with the one-level Regenerative beds and secondary regenerator bed；Main wind preheater, on the main air duct, and it is located at the oxygen
Between distributor and main air distributor, for heating oxygen-enriched main wind air.
Preferably, the oxygen distribution ware is a porous distributor pipe, and the porous distributor pipe is provided with multiple through holes.
Preferably, 1~3mm of bore of the through hole of the porous distributor pipe, its blowing angle are 0~60 °.
Preferably, the main air distributor is a corrugated plating, and the corrugated plating is provided with multiple through holes, and the corrugated plating
Through hole first end bore the bore more than its second end, and the bore of second through hole from its first end to its
Two ends are gradually reduced.
Preferably, the bore of the first end of the through hole of the corrugated plating is 150~300 μm, and the bore at its second end is 100
μm-200μm。
Preferably, the secondary regenerator bed includes dense bed and dilute-phase leanphase fluidized bed, and the external warmer passes through catalyst circulation pipe
Dense bed of the line respectively with the one-level Regenerative beds and secondary regenerator bed connects.
Catalytic cracked regenerated system of the present utility model can realize following at least one beneficial effect.
1st, catalytic cracked regenerated system of the present utility model adjusts the pressure and flow of oxygen by oxygen controller, and leads to
Crossing oxygen distribution ware makes oxygen be evenly distributed in the main wind air of main air duct, so as to improve the partial pressure of oxygen of regenerative response, then leads to
Cross main air distributor oxygen-enriched main wind air is evenly distributed in one-level Regenerative beds, so as to improve gas and solid in Regenerative beds
Relative motion, accelerate Gas-solid surface renewal, reduce gas-solid interface resistance to mass tranfer, effectively increase coke-burning rate, realize
The high coke burning degree of oxygen-enriched main wind.
2nd, the oxygen distribution ware in catalytic cracked regenerated system of the present utility model and main air distributor be provided with through hole,
After gas is by through hole, speed is accelerated, so as to accelerate the mass transfer between mixing and gas-solid between gas with various, so as to carry
The uniformity that high oxygen mixes in main wind air and improve the gas solid transfer in regenerator, improve Regenerative beds coke-burning rate and
The utilization rate of oxygen.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description：
Fig. 1 is a kind of structural representation of specific embodiment of catalytic cracked regenerated system of the present utility model；
Fig. 2 is the partial structural diagram of main air distributor in catalytic cracked regenerated system shown in Fig. 1；
Fig. 3 is the partial enlargement structural representation of main air distributor in catalytic cracked regenerated system shown in Fig. 2；
Fig. 4 is the partial structural diagram of oxygen distribution ware in catalytic cracked regenerated system shown in Fig. 1；
Fig. 5 is the sectional view of oxygen distribution ware in catalytic cracked regenerated system shown in Fig. 4.
Drawing reference numeral explanation：
It is main air duct 1, oxygen controller 2, oxygen distribution ware 3, one-level Regenerative beds 4, main air distributor 5, corrugated plating 51, logical
Hole 52, secondary regenerator bed 6, cyclone separator 7, external warmer 8, catalyst recycle line 9, main wind preheater 10, oxygen channel
11。
Embodiment
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
It should be noted that improve the efficiency of regenerator is to improve to burn reaction rate at all, and catalyst burns
React for gas and solid heterogeneous reaction, burn reaction rate and be limited by intrinsic reaction rate and the aspect of mass transfer two.Influence intrinsic burn
The factor of reaction rate is mainly concentration of carbon, oxygen concentration and temperature.Intrinsic reaction rate of burning is represented with theoretical coke burning degree, real
Border burns that reaction rate is not only related to concentration of carbon, oxygen concentration, temperature, the mass transfer rate and gas being also limited by between gas-solid with it is solid
The even fluidizing degree of body catalyst, actually burn reaction rate and represented with actual coke burning degree.
(1) intrinsic reaction
Carbon distribution in catalytic cracking reaction on catalyst is mainly made up of carbon and a small amount of hydrogen and micro sulphur, nitrogen
Highly condensed thing, burn reaction mechanism and be divided into according to the composition of coke and burn two kinds of carbon and annealing in hydrogen atmosphere, its reaction principle is as follows：
C+O2→CO2
H2+0.5O2→H2O
Because annealing in hydrogen atmosphere reaction speed is almost twice of speed of making charcoal, so the control reaction that regenerator burns reaction is to burn
Charcoal reacts, and the factor of reaction speed of influenceing to make charcoal has：Regeneration temperature：Temperature is higher, and reaction rate is faster；(oxygen is dense for partial pressure of oxygen
Degree)：Partial pressure of oxygen is higher, and reaction rate is faster；Catalyst phosphorus content：Catalyst phosphorus content is higher, and reaction rate is faster.This 3
In individual factor, the phosphorus content of catalyst is determined by the reaction of catalytic cracking.Made charcoal reaction speed so wanting raising, improve reaction
Temperature and partial pressure of oxygen are two effective ways.
Therefore, the applicant provides the specific embodiment of following two catalytic cracked regenerated systems.
Embodiment one
As shown in figure 1, embodiment one discloses a kind of catalytic cracked regenerated system, including：Main air duct 1, for conveying
Main wind air；Oxygen channel 11, connected with main air duct 1, for conveying oxygen to main air duct；Oxygen controller 2, positioned at oxygen
In feed channel 11, for adjusting the pressure and flow of oxygen；Oxygen distribution ware 3, it is arranged on oxygen channel 11 and main air duct 1
Connectivity part, it is evenly distributed on for oxygen in main wind and obtains oxygen-enriched main wind air；One-level Regenerative beds 4, including first entrance and
Two entrances, first entrance connect with main air duct 1, and second entrance is used to add reclaimable catalyst, and one-level Regenerative beds are used to treat
Raw catalyst carries out one-level regeneration；Main air distributor 5, it is arranged in one-level Regenerative beds 4, the outlet with main air duct 1, uses
It is evenly distributed in by oxygen-enriched main wind air in one-level Regenerative beds；Secondary regenerator bed 6, connected with one-level Regenerative beds 4, for one
Catalyst after level regeneration carries out secondary regenerator；Cyclone separator 7, it is arranged in secondary regenerator bed 6, for by after secondary regenerator
Regenerated catalyst separate；External warmer 8, connected respectively with one-level Regenerative beds 4 and secondary regenerator bed 6；Main wind preheater
10, on main air duct 1, and between oxygen distribution ware and main air distributor, for heating oxygen-enriched main wind air.
As shown in figure 4, in the present embodiment, oxygen distribution ware 3 is a porous distributor pipe, porous distributor pipe is provided with multiple
Through hole, and through hole has specific angle and aperture.Specifically, 1~3mm of bore of the through hole of porous distributor pipe, its perforate angle
Spend for 0~60 °.Porous distributor pipe as shown in Figure 5, on the section of porous distributor pipe, the perforate of porous distributor pipe
Angle is 0~60 °.When passing through aperture due to oxygen, its speed increase, so that oxygen can be sufficiently mixed with main wind air
To uniform oxygen-enriched main wind air, the uniformity that oxygen mixes with main wind air can be effectively improved by so setting.
As shown in Figures 2 and 3, in the present embodiment, main air distributor 5 is a corrugated plating 51, and corrugated plating 51 is provided with more
Individual through hole 52, and the bore more than its second end of the bore of the first end of through hole 52, and the bore of the through hole 52 from its
One end is gradually reduced to its second end.Specifically, 150~300 μm of the bore of the first end of the through hole of card, the mouth at its second end
Footpath is 100 μm -200 μm.Because the bore of through hole is gradually reduced from first end to the second end, thus oxygen-enriched main wind air along
Through hole first end points to the direction at the second end when passing through main air distributor, the increase of its speed, so that oxygen-enriched main wind air can be with
Be sufficiently mixed with the reclaimable catalyst in one-level Regenerative beds, so set can improve it is relative between gas-solid in one-level Regenerative beds
Motion, further improves coke-burning rate.
Specifically, secondary regenerator bed 6 includes dense bed and dilute-phase leanphase fluidized bed, dense bed is located at the bottom of secondary regenerator bed, dilute phase
Bed is in the top of dense bed.External warmer 8 passes through catalyst recycle line 9 and one-level Regenerative beds 4 and secondary regenerator bed 6
Dense bed connects.The catalyst in dense bed in secondary regenerator bed enters in external warmer by catalyst recycle line
It is passed into again in one-level Regenerative beds after row cooling heat transferring and carries out first order reaction again, is so set further to improve and burn instead
The intensity answered.
The pressure and flow of oxygen controller regulation oxygen in catalytic cracked regenerated system in the present embodiment, so as to reduce
It is fluctuated, then oxygen is passed into main air duct by oxygen distribution ware and mixed with main wind, so as to obtain oxygen-enriched main wind air,
Oxygen-enriched main wind air enters by main air distributor is mixed to get gas-solid dense fluidized with reclaimable catalyst in one-level Regenerative beds
Bed, radially uniform distribution of the oxygen-enriched main wind air in one-level Regenerative beds is realized, more than 85% carbon is completed in one-level Regenerative beds
After burning and 100% hydrogen burning, main wind entrained catalyst, which enters in secondary regenerator bed, continues secondary regenerator reaction, two
Sufficient carbon burning is carried out again so as to obtain regenerated catalyst in level Regenerative beds, and regenerated catalyst is in the presence of cyclone separator
It is discharged secondary regenerator bed.
The utility model realizes fast fluidization of the catalyst in Regenerative beds, reduces gas solid transfer to greatest extent, passes
Resistance to heat, improve and burn reaction rate, avoid different zones coke burning degree inequality in Regenerative beds and cause catalyst part mistake
Burn and oxygen utilization rate is low, improve Regenerative beds coke-burning capacity, improve oxygen utilization rate and reduce exhaust gas volumn.
Of course, in other specific embodiments, the main air distributor in catalytic cracked regenerated system of the present utility model
Pipe distributor can be selected, but pipe distributor divides distributed effect more far short of what is expected than corrugated board structures gas；One-level
Interior heat collector can also be set in Regenerative beds and secondary regenerator bed, or be used in mixed way interior heat collector and external warmer；It is in addition, main
The specific size of through hole on the corrugated plating of wind distributor can be adjusted according to being actually needed, it is only necessary to when passing the gas through
Acceleration can be obtained.
Embodiment two
The invention also discloses a kind of catalytic cracked regenerated method, including step：
S10：The flow of oxygen is adjusted to preset flow, the pressure of oxygen is adjusted to preset pressure, makes the flow of oxygen
Fluctuation and the fluctuation of pressure are respectively less than 1%；
S20：Oxygen after regulation and main wind air are mixed to get oxygen-enriched main wind air；
S30：Entered after oxygen-enriched main wind air preheat by main air distributor in one-level Regenerative beds, and oxygen-enriched main wind air
Be 50~80m/s by the initial velocity after main air distributor, add spent agent into one-level Regenerative beds, oxygen-enriched main wind air with
Reclaimable catalyst carries out one-level regenerative response in one-level Regenerative beds；
S40：Main wind air after one-level regenerative response carries out secondary regenerator reaction with catalyst in secondary regenerator bed；
S50：It will obtain being regenerated catalyst through cyclone separator after secondary regenerator and separated from flue gas；
S60：The catalyst in dense bed during secondary regenerator is reacted returns to the one-level after being cooled down in external warmer
In Regenerative beds.
Specifically, in step S20, the initial velocity that oxygen enters main wind air is 60~200m/s, and high speed oxygen is disturbed
Main wind is moved, the uniform mixing of oxygen and main wind air is completed in very short time.In addition, in step S20, oxygen-enriched main wind air
In oxygen concentration be 24~45%, if oxygen-rich concentration is less than this scope, then regeneration effect unobvious, if oxygen-rich concentration
It is too high, it can cause to regenerate bed tempertaure overtemperature, catalyst heat is collapsed damage.
Specifically, in step s 30, the density for the gas-solid dense-phase fluidized bed that oxygen-enriched main wind air is formed with reclaimable catalyst
For 100~300kg/m3, density is too low, and Regenerative beds reserve diminishes, and is unfavorable for making full use of for the oxygen-enriched main wind air of high concentration, close
Height is spent, is unfavorable for the uniform heat exchange of catalyst, easily causes local burning, further results in that the heat of catalyst collapses and damaged.
Also, the temperature of one-level regenerative response is 680~720 DEG C, and temperature is too low, and reaction speed is slow, and temperature is too high, can cause to be catalyzed
Agent temperature raises, and produces a large amount of vapor, increases the probability that crumbles of catalyst.In addition, in one-level Regenerative beds, oxygen-enriched main wind is empty
The gas-solid dense-phase fluidized bed that gas is formed with reclaimable catalyst, the flow rates of gas are 1.0~3.0m/s, and gas velocity is too low, unfavorable
Quick renewal and gas-solid interface mass transfer in gas-solid interface, reaction rate reduction is actually burnt, gas velocity is too high to cause catalyst
Sharp impacts and increase abrasion.
Specifically, in the step S40, the epimere of secondary regenerator bed is the dilute phase that density gradually reduces (from the bottom to top)
Bed, hypomere is dense bed, and the density of dilute-phase leanphase fluidized bed is less than the density of its dense bed, and the density range of secondary regenerator bed is：5~
200kg/m3.The density of top bed is low, and this is advantageous to the burden for mitigating cyclonic separation, reduces regenerated catalyst loss.In addition,
Because catalyst sinks, high speed relative motion, gas-solid interface resistance to mass tranfer are kept between oxygen-enriched main wind air and solid catalyst
Small, Gas-solid surface updating decision, although the reduction of oxygen concentration, coke-burning rate decrease, quick gas-solid relative motion increases
Oxygen makes catalyst preferably catch oxygen, is advantageous to making full use of for oxygen, improves oxygen to the transfer rate of catalyst
Utilization rate and coke-burning rate, reduce and determine carbon on regenerative agent.
Specifically, the temperature of secondary regenerator reaction is 700~750 DEG C in step s 40, and the temperature of secondary regenerator reaction
More than the temperature of one-level regenerative response, secondary regenerator reaction temperature is too low, and reaction speed is slow, and temperature is too low, can make catalyst temperature
Degree rise, produces a large amount of vapor, increases the probability that crumbles of catalyst.In secondary regenerator bed, oxygen-enriched main wind air with it is to be generated
The gas-solid dense-phase fluidized bed that catalyst is formed, the flow rates of gas are 0.3~1.0m/s, and the underlying gas of secondary regenerator bed
Flow velocity be more than top tank air flow velocity.
According to catalytic cracked regenerated method disclosed in catalytic cracked regenerated system and embodiment two disclosed in embodiment one
Four contrast tests are carried out, the experiment parameter and result of four contrast tests are as shown in the table.
Table 1：Four contrast tests
It is can be seen that by four groups of contrast tests in upper table compared with traditional completely burned regeneration techniques, this practicality is new
The coke burning degree of the catalytic cracked regenerated system of type improves more than 20%, and oxygen utilization rate improves at least more than 1%, catalysis
Cracking unit production capacity improves more than 20%.
Catalytic cracked regenerated system of the present utility model overcomes existing regeneration techniques defect, using oxygen-enriched air as combustion-supporting
Medium, while the gas distributor of special construction is used, the gas solid transfer in intensifying regenerating bed, in the regenerative operation condition of optimization
Under, regenerator coke burning degree and oxygen utilization rate are improved, reduces exhaust gas volumn.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (6)
- A kind of 1. catalytic cracked regenerated system, it is characterised in that including：Main air duct, for conveying main wind air；Oxygen channel, connected with the main air duct, for conveying oxygen to the main air duct；Oxygen controller, on the oxygen channel, for adjusting the pressure and flow of oxygen；Oxygen distribution ware, the connectivity part of the oxygen channel and the main air duct is arranged on, for oxygen to be evenly distributed on Oxygen-enriched main wind air is obtained in main wind；One-level Regenerative beds, including first entrance and second entrance, the first entrance connect with the main air duct, and described second Entrance is used to add reclaimable catalyst, and the one-level Regenerative beds are used to carry out one-level regeneration to reclaimable catalyst；Main air distributor, it is arranged in the one-level Regenerative beds, the outlet with the main air duct, for by oxygen-enriched main wind Air is evenly distributed in the one-level Regenerative beds；Secondary regenerator bed, connected with the one-level Regenerative beds, secondary regenerator is carried out for the catalyst after being regenerated to one-level；Cyclone separator, it is arranged in the secondary regenerator bed, for separating and recovering the catalyst in flue gas；External warmer, connected respectively with the one-level Regenerative beds and secondary regenerator bed；Main wind preheater, on the main air duct, and between the oxygen distribution ware and main air distributor, for adding The oxygen-enriched main wind air of heat.
- 2. catalytic cracked regenerated system as claimed in claim 1, it is characterised in that：The oxygen distribution ware is a porous distributor pipe, and the porous distributor pipe is provided with multiple through holes.
- 3. catalytic cracked regenerated system as claimed in claim 2, it is characterised in that：The bore of the through hole of the porous distributor pipe is 1~3mm, and its blowing angle is 0~60 °.
- 4. catalytic cracked regenerated system as claimed in claim 1, it is characterised in that：The main air distributor is a corrugated plating, and the corrugated plating is provided with multiple through holes, and the of the through hole of the corrugated plating The bore more than its second end of the bore of one end, and its bore is gradually reduced from its first end to its second end.
- 5. catalytic cracked regenerated system as claimed in claim 4, it is characterised in that：The bore of the first end of the through hole of the corrugated plating is 150~300 μm, and the bore at its second end is 100 μm -200 μm.
- 6. catalytic cracked regenerated system as claimed in claim 1, it is characterised in that：The secondary regenerator bed includes dense bed and dilute-phase leanphase fluidized bed, the external warmer by catalyst recycle line respectively with it is described One-level Regenerative beds connect with the dense bed of secondary regenerator bed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720417929.3U CN206996619U (en) | 2017-04-20 | 2017-04-20 | A kind of catalytic cracked regenerated system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720417929.3U CN206996619U (en) | 2017-04-20 | 2017-04-20 | A kind of catalytic cracked regenerated system |
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| CN206996619U true CN206996619U (en) | 2018-02-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780140A (en) * | 2020-07-30 | 2020-10-16 | 南京大学环境规划设计研究院股份公司 | Heat accumulating type catalytic combustion device for VOCs treatment |
| WO2023098879A1 (en) * | 2021-12-03 | 2023-06-08 | 中国石油化工股份有限公司 | Fluid catalytic cracking regeneration apparatus, and use thereof |
-
2017
- 2017-04-20 CN CN201720417929.3U patent/CN206996619U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780140A (en) * | 2020-07-30 | 2020-10-16 | 南京大学环境规划设计研究院股份公司 | Heat accumulating type catalytic combustion device for VOCs treatment |
| WO2023098879A1 (en) * | 2021-12-03 | 2023-06-08 | 中国石油化工股份有限公司 | Fluid catalytic cracking regeneration apparatus, and use thereof |
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