CN205368261U - Produce device of high propylene content cracked gas and low olefin(e) centent petrol - Google Patents
Produce device of high propylene content cracked gas and low olefin(e) centent petrol Download PDFInfo
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- CN205368261U CN205368261U CN201521072147.8U CN201521072147U CN205368261U CN 205368261 U CN205368261 U CN 205368261U CN 201521072147 U CN201521072147 U CN 201521072147U CN 205368261 U CN205368261 U CN 205368261U
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Abstract
The utility model discloses a produce device of high propylene content cracked gas and low olefin(e) centent petrol belongs to the catalytic cracking field. Among the the device, the export of first riser, the import of first settler and catalyst export, a catalytic cracking regenerator, first riser catalyst inlet feed through in order, the export of second riser, the import of second settler and catalyst export, the 2nd catalytic cracking regenerator, second riser catalyst inlet feed through in order, the export of first settler oil gas, first fractionating tower raw materials import and gas exports, first cooler, vapour and liquid separator import and liquid phase export, second riser raw materials import and export, the import of second settler and oil gas export, after -fractionating tower raw materials import and gas exports, second cooler, the 2nd vapour and liquid separator feed through in order. The utility model discloses a device adopts different catalyst to heavy oil and light oil, improves catalytic selectivity, can obtain the cracked gas of high propylene content and the petrol of low olefin(e) centent.
Description
Technical field
This utility model relates to catalytic cracking field, particularly to the device producing high propylene content cracked gas and gasoline with low olefine content.
Background technology
Catalytic cracking is a kind of common petroleum refining process, and it makes mink cell focus generation cracking reaction under the effect of heat and catalyst, is changed into containing the cracked gas such as ethylene, propylene, gasoline and diesel oil etc..With traditional with light naphtha such as Petroleum, light diesel fuel, liquefied petroleum gas for compared with the steam cracking process of raw material, catalytic cracking usually leads to more low-carbon alkene, especially the cracked gas that propylene content is higher, it has the advantages such as raw material is extensive, propylene/ethylene ratio is high, energy consumption is little, operating condition is gentle, production cost is low.Wherein, propylene is as important basic organic synthesis raw material, and its market demand increases year by year, and the gasoline obtained by catalytic cracking also becomes the main composition part of merchantable gasoline.Visible, it is provided that a kind of device producing high propylene content cracked gas and gasoline with low olefine content is very necessary.
Prior art provides such a and utilizes two-stage catalytic cracking to produce the device of propylene and high-quality petrol and diesel oil, including: heavy raw oil is after first paragraph riser with regeneration catalyzing agent haptoreaction, subsequent separation system after entrance gas-solid settler, obtain well-behaved diesel oil, the gasoline of high olefin content, gaseous product and slurry oil, reclaimable catalyst regenerates after steam strips, then the raw gasoline that first paragraph riser is obtained by reacting enters second segment riser, and with the catalyst haptoreaction from regenerator, more propylene can be obtained, obtain the gasoline that quality is improved simultaneously.And study discovery, the device that prior art provides uses identical catalyst in two-stage riser, the selectivity of the catalytic action of the reaction raw materials in each riser is poor, and then the limitation for the raising of final productivity of propylene and the improvement of quality of gasoline is bigger.Additionally heavy oil is with gasoline at identical lifting inner reaction tube, and owing to heavy oil is different with the condition of gasoline reaction needed, and riser cannot provide optimum operating condition for the two, thus being unfavorable for improving propene yield and improving quality of gasoline.
Further, disclosed in such as Chinese patent CN101074392A, two risers all adopt rich in the catalyst selecting type molecular sieve, type molecular sieve of selecting therein is for gasoline cracking reaction, gasoline stocks with when contacting rich in the catalyst selecting type molecular sieve, mainly utilize and therein select type molecular sieve catalyst, this actual oil ratio resulting in reaction declines, gasoline conversion will be unfavorable for, equally, the actual oil ratio of heavy oil reaction also reduces, and is also unfavorable for that heavy oil converts.Patent CN101074392A mentions light hydrocarbons with heavy oil at identical lifting inner reaction tube, it is impossible to convert, for the two, the operating condition providing optimum.
Utility model content
This utility model embodiment technical problem to be solved is in that, provide a kind of by using catalyst two kinds different in different risers, to be effectively improved productivity of propylene and to improve the device producing high propylene content cracked gas and gasoline with low olefine content of quality of gasoline.Concrete technical scheme is as follows:
This utility model embodiment provides a kind of device producing high propylene content cracked gas and gasoline with low olefine content, including: the first riser, the first settler, the first catalytic cracking regenerator, the first fractionating column, the first cooler, the first gas-liquid separator, the second riser, the second settler, the second catalytic cracking regenerator, after-fractionating tower, the second cooler and the second gas-liquid separator；
The outlet of described first riser, the import of described first settler and catalyst outlet, described first catalytic cracking regenerator, described first riser catalyst inlet sequentially connect, constitute the first catalyst regeneration reuse unit；
The outlet of described second riser, the import of described second settler and catalyst outlet, described second catalytic cracking regenerator, described second riser catalyst inlet sequentially connect, constitute the second catalyst regeneration reuse unit；
The oil gas vent of described first settler, the material inlet of described first fractionating column and gaseous phase outlet, described first cooler, the import of described first gas-liquid separator and liquid-phase outlet, the material inlet of described second riser and outlet, the import of described second settler and oil gas vent, the material inlet of described after-fractionating tower and gaseous phase outlet, described second cooler, described second gas-liquid separator sequentially connect.
Further, described device also includes the first catalyst pre-riser and the second catalyst pre-riser；
Described first catalyst pre-riser connects with the catalyst inlet of described first riser；
Described second catalyst pre-riser connects with the catalyst inlet of described second riser.
Further, described device also includes the 3rd fractionating device, connects with the gaseous phase outlet of the gaseous phase outlet of described first gas-liquid separator and described second gas-liquid separator simultaneously.
The technical scheme that this utility model embodiment provides has the benefit that
The device producing high propylene content cracked gas and gasoline with low olefine content that this utility model embodiment provides, by arranging the first independent riser and the second riser, and the first independent catalyst regeneration reuse unit and the second catalyst regeneration reuse unit are set, so that heavy oil feedstock can in the first riser, under being appropriate to the effect of catalyst of residual oil cracking, carry out catalytic reaction, and in the first catalyst regeneration reuse unit, this catalyst is carried out catalytic regeneration；Raw gasoline after RFCC, then in the second riser, carries out catalytic reaction under the effect of another catalyst of applicable raw gasoline cracking, and in the second catalyst regeneration reuse unit, this another catalyst is carried out catalytic regeneration.So arrange, adopt different catalyst for heavy oil and being respectively directed to property of light oil, improve its catalytic selectivity, it is possible to obtain cracked gas and the gasoline with low olefine content of high propylene content, and then ensureing that propylene content is effectively improved, quality of gasoline is also effectively improved.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, below the accompanying drawing used required during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the device producing high propylene content cracked gas and gasoline with low olefine content that this utility model embodiment provides.
Accompanying drawing labelling represents respectively:
1 first riser,
2 first settlers,
3 first catalytic cracking regenerators,
4 first fractionating columns,
5 first coolers,
6 first gas-liquid separators,
7 second risers,
8 second settlers,
9 second catalytic cracking regenerators,
10 after-fractionating towers,
11 second coolers,
12 second gas-liquid separators,
13 first catalyst pre-risers,
14 second catalyst pre-risers,
15 the 3rd fractionating devices,
A heavy oil feedstock,
B1 the first catalyst,
B2 the second catalyst,
C1 the first oil gas product,
C2 the second oil gas product,
D slurry oil,
E diesel oil,
F1 the first light oil,
F2 the second light oil,
G cracked gas,
H raw gasoline,
I product gasoline.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, this utility model embodiment is described in further detail.
This utility model embodiment provides a kind of device producing high propylene content cracked gas and gasoline with low olefine content, as shown in Figure 1, this device includes: first riser the 1, first settler the 2, first catalytic cracking regenerator the 3, first fractionating column the 4, first cooler the 5, first gas-liquid separator the 6, second riser the 7, second settler the 8, second catalytic cracking regenerator 9, after-fractionating tower the 10, second cooler 11 and the second gas-liquid separator 12.
Wherein, the outlet of the first riser 1, the import of the first settler 2 and the catalyst inlet of catalyst outlet, first catalytic cracking regenerator the 3, first riser 1 sequentially connect, and constitute the first catalyst regeneration reuse unit.The outlet of the second riser 7, the import of the second settler 8 and the catalyst inlet of catalyst outlet, second catalytic cracking regenerator the 9, second riser 7 sequentially connect, and constitute the second catalyst regeneration reuse unit.
The oil gas vent of the first settler 2, the material inlet of the first fractionating column 4 and gaseous phase outlet, the import of first cooler the 5, first gas-liquid separator 6 and liquid-phase outlet, the material inlet of the second riser 7 and outlet, the import of the second settler 8 and oil gas vent, the material inlet of after-fractionating tower 10 and gaseous phase outlet, second cooler the 11, second gas-liquid separator 12 sequentially connect.
The device producing high propylene content cracked gas and gasoline with low olefine content that this utility model embodiment provides, by arranging the first independent riser 1 and the second riser 7, and the first independent catalyst regeneration reuse unit and the second catalyst regeneration reuse unit are set, so that heavy oil feedstock A can in the first riser 1, under being appropriate to the effect of catalyst of residual oil cracking, carry out catalytic reaction, and in the first catalyst regeneration reuse unit, this catalyst is carried out catalytic regeneration；Raw gasoline after RFCC, then in the second riser 7, carries out catalytic reaction under the effect of another catalyst of applicable raw gasoline cracking, and in the second catalyst regeneration reuse unit, this another catalyst is carried out catalytic regeneration.So arrange, adopt different catalyst for heavy oil and being respectively directed to property of raw gasoline, improve its catalytic selectivity, it is possible to obtain cracked gas and the gasoline with low olefine content of high propylene content, and then ensureing that propylene content is effectively improved, quality of gasoline is also effectively improved.
It will be understood by those skilled in the art that, riser described in this utility model embodiment, settler, catalytic cracking regenerator, fractionating column, cooler, gas-liquid separator are the state of the art, and their structure is not done concrete restriction at this by this utility model embodiment.
Wherein, the middle part of the first fractionating column and after-fractionating tower 10 is provided with diesel oil outlet, is used for discharging diesel oil E；Bottom is provided with slurry oil outlet, is used for discharging slurry oil D.
Further, the device that this utility model embodiment provides also includes the first catalyst pre-riser 13 and the second catalyst pre-riser 14.Wherein, the first catalyst pre-riser 13 connects with the catalyst inlet of the first riser 1；Second catalyst pre-riser 14 connects with the catalyst inlet of the second riser 7.This utility model embodiment passes through the first catalyst pre-riser 13 and the second catalyst pre-riser 14 as set above, to utilize steam or other available dry gas that catalyst is carried out pre-lift, it is prevented that the sedimentation of catalyst or uneven distribution.
Further, the device that this utility model embodiment provides also includes the 3rd fractionating device 15 and (is understandable that, the two different fractionating devices of set that 3rd fractionating device 15 can also be), 3rd fractionating device 15 can connect with the gaseous phase outlet of the first gas-liquid separator 6 and the gaseous phase outlet of the second gas-liquid separator 12 simultaneously, so that to the gas-phase product come from the first gas-liquid separator 6 and the second gas-liquid separator 12, namely cracked gas G carries out further fractional distillation, it is thus achieved that the specific product such as propylene, butylene.It is understood that the gaseous phase outlet of the first gas-liquid separator 6 can be connected with a fractionating device independently, and the gaseous phase outlet of the second gas-liquid separator 12 can be connected with another one fractionating device.
Second aspect, utilizes the device that this utility model embodiment provides to produce the method for high propylene content cracked gas and gasoline with low olefine content as follows:
Heavy oil feedstock A and the first catalyst B1 carries out the first catalytic reaction in the first riser 1, obtains the first catalysate, and the first catalysate enters in the first settler 2 and carries out settlement treatment, obtains the first green coke catalyst B1 and the first oil gas product C1.First green coke catalyst B1 enters in the first catalytic cracking regenerator 3 and carries out Regeneration Treatment, recycles subsequently in the first riser 1.Meanwhile, the first oil gas product C1 enters in the first fractionating column 4 and is easily separated, and obtains slurry oil D, diesel oil E and the first light oil F1, and the first light oil F1 enters the first gas-liquid separator 6 after the first cooler 5 cooling and carries out gas-liquid separation, obtains cracked gas G and raw gasoline H.
Raw gasoline H enters the second riser 7, carries out the second catalytic reaction, obtain the second catalysate under the effect of the second catalyst B2, and the second catalysate enters in the second settler 8 and carries out settlement treatment, obtains the second green coke catalyst B2 and the second oil gas product C2.Wherein, the second green coke catalyst B2 enters in the second catalytic cracking regenerator 9 and carries out Regeneration Treatment, recycles subsequently in the second riser 7；Meanwhile, second oil gas product C2 enters in after-fractionating tower 10 and is easily separated, obtaining slurry oil D, diesel oil E and the second light oil F2, the second light oil F2 enters the second gas-liquid separator 12 after the second cooler 11 cooling and carries out gas-liquid separation, obtains cracked gas G and product gasoline I.First catalyst B1 is super stable molecular sieve catalyst, for instance it can be super steady USY, super steady Rare Earth Y, super steady rare earth USY, the super steady USY of P Modification, metal-modified super steady USY, the Average Particle Diameters of catalyst about 60-80 micron；Second catalyst B2 is ZSM-5 molecular sieve shape-selective catalyst.
By in two independent risers, and under different catalyst actions, carry out catalytic reaction, it is effectively increased the catalytic selectivity of catalytic reaction raw material, it is obtained in that cracked gas and the gasoline with low olefine content of high propylene content, and then ensureing that propylene content is effectively improved, quality of gasoline is also effectively improved.
Hereinafter will be further described through this utility model by specific embodiment.In specific examples below, the unreceipted condition person of involved operation, all conventionally the condition of condition or manufacturer's suggestion carries out.Raw materials used unreceipted production firm and specification person be can pass through city available from conventional products.
Embodiment 1
As shown in Figure 1, this utility model embodiment provides a kind of device producing high propylene content cracked gas G and gasoline with low olefine content, and this device includes: first riser the 1, first settler the 2, first catalytic cracking regenerator the 3, first fractionating column the 4, first cooler the 5, first gas-liquid separator the 6, second riser the 7, second settler the 8, second catalytic cracking regenerator 9, after-fractionating tower the 10, second cooler the 11, second gas-liquid separator the 12, first catalyst pre-riser the 13, second catalyst pre-riser the 14, the 3rd fractionating device 15.
Wherein, the upper outlet of the first riser 1, the centre inlet of the first settler 2 and the catalyst inlet of lower catalytic agent outlet, first catalytic cracking regenerator the 3, first riser 1 bottom sequentially connect, and constitute the first catalyst regeneration reuse unit.The upper outlet of the second riser 7, the centre inlet of the second settler 8 and the catalyst inlet of lower catalytic agent outlet, second catalytic cracking regenerator the 9, second riser 7 bottom sequentially connect, and constitute the second catalyst regeneration reuse unit.Wherein, the first catalytic cracking regenerator 3 and the first riser 1, and the connection between the second catalytic cracking regenerator 9 and the second riser 7 can be realized by inclined tube.
Import in the middle part of the oil gas vent on the first settler 2 top, the material inlet of the first fractionating column 4 bottom and the gaseous phase outlet on top, the import of first cooler the 5, first gas-liquid separator 6 and liquid-phase outlet, the material inlet of the second riser 7 bottom and the outlet on top, the second settler 8 and the oil gas vent at top, the material inlet of after-fractionating tower 10 bottom and the gaseous phase outlet at top, second cooler the 11, second gas-liquid separator 12 sequentially connect.The middle part of the first fractionating column and after-fractionating tower 10 is provided with diesel oil outlet, is used for discharging diesel oil E；Bottom is provided with slurry oil outlet, is used for discharging slurry oil.
First catalyst pre-riser 13 connects with the catalyst inlet of the first riser 1 bottom；Second catalyst pre-riser 14 connects with the catalyst inlet of the second riser 7 bottom.3rd fractionating device 15 connects with the gaseous phase outlet of the first gas-liquid separator 6 and the gaseous phase outlet of the second gas-liquid separator 12 simultaneously.
Embodiment 2
The present embodiment utilizes the device that embodiment 1 provides to carry out the production of high propylene content cracked gas and gasoline with low olefine content, specifically comprises the following steps that
The heavy oil feedstock A being preheated to 200 DEG C is entered in the first riser 1, and be 530 DEG C in reaction temperature, reaction absolute pressure is when being 0.24MPa, and the first catalyst B1 after pre-lift medium rectification: super stable molecular sieve catalyst contacts 0.8s, there is catalytic reaction.Wherein, super stable molecular sieve catalyst is 8:1 with the mass ratio of heavy oil feedstock A.The super stable molecular sieve catalyst of the oil gas product obtained after catalytic reaction and green coke together enters in the first settler 2 and carries out settlement treatment, the super stable molecular sieve catalyst of the green coke that separation obtains enters and carries out coke burning regeneration in the first catalytic cracking regenerator 3 at 700 DEG C, enters in the first riser 1 and be circulated utilization after regeneration.And separation obtains oil gas and is easily separated entering in the first fractionating column 4, obtain slurry oil D, diesel oil E and the first light oil F1.Collect slurry oil D and diesel oil E, and the first light oil F1 enters the first gas-liquid separator 6 after the first cooler 5 is cooled to 50 DEG C and carries out gas-liquid separation, obtains uncooled cracked gas G and raw gasoline H.
Raw gasoline H enters the second riser 7, and is 550 DEG C in reaction temperature, when reaction absolute pressure is 0.24MPa, with the second catalyst B2:ZSM-5 molecular sieve shape-selective catalyst haptoreaction 0.7s after pre-lift medium rectification.Wherein, ZSM-5 molecular sieve shape-selective catalyst is 20:1 with the mass ratio of heavy oil feedstock A.The ZSM-5 molecular sieve shape-selective catalyst of the oil gas product obtained after catalytic reaction and green coke together enters in the second settler 8 and carries out settlement treatment, the ZSM-5 molecular sieve shape-selective catalyst of the green coke that separation obtains enters and carries out coke burning regeneration in the second catalytic cracking regenerator 9 at 660 DEG C, enters in the second riser 7 and be circulated utilization after regeneration.Meanwhile, separation obtains oil gas product and will be easily separated in entrance after-fractionating tower 10, obtain slurry oil D, diesel oil E and the second light oil F2, collect the product of slurry oil D and diesel oil E, and the second light oil F2 enters the second gas-liquid separator 12 after the second cooler 11 is cooled to 40 DEG C and carries out gas-liquid separation, obtain cracked gas G and product gasoline I.The cracked gas G twice catalytic reaction obtained all enters in the 3rd fractionating device 15 and is easily separated, and obtains propylene, ethylene and other low-carbon alkenes and product gasoline H.
Wherein, the character of the heavy oil feedstock A that the present embodiment uses is as shown in table 1:
Table 1
| Raw oil | Numerical value |
| Density, kg/m3 | 899 |
| Carbon residue, wt% | 4.58 |
| Sulfur content, wt% | 0.27 |
| Nitrogen content, wt% | 0.23 |
| Race composition wt% | |
| Saturated point | 64.95 |
| Fragrance point | 23.35 |
| Colloid | 11.09 |
| Asphalitine | 0.61 |
Wherein, the character of the product (including cracked gas and product gasoline) that the present embodiment is obtained by reacting is as shown in table 2:
Table 2
| Product | Numerical value |
| Dry gas wt% | 4.8 |
| Ethylene wt% | 2.5 |
| Liquefied gas wt% | 48.63 |
| Propylene wt% | 21.15 |
| Gasoline wt% | 15.53 |
| Diesel oil wt% | 17.07 |
| Slurry oil wt% | 4.84 |
| Coke wt% | 9.13 |
| The character of product gasoline | |
| Olefin(e) centent v% | 10 |
| Arene content v% | 60 |
| Octane number RON | 96 |
As shown in Table 2, utilize the device that this utility model embodiment provides that heavy oil feedstock is carried out catalytic cracking, desirable products distribution can be obtained, especially propene yield can reach 21.15wt%, in gasoline, olefin(e) centent is up to 10v%, octane number is up to 96, it is possible to carry out the preparation of merchantable gasoline as a kind of high-quality gasoline blend component.Visible, the device that this utility model embodiment provides, improving low-carbon alkene, the especially productivity of propylene, improves gasoline product quality aspect and has significant advantage.
The foregoing is only preferred embodiment of the present utility model; not in order to limit protection domain of the present utility model; all within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.
Claims (3)
1. produce the device of high propylene content cracked gas and gasoline with low olefine content, including: the first riser, the first settler, the first catalytic cracking regenerator, the first fractionating column, the first cooler, the first gas-liquid separator, the second riser, the second settler, the second catalytic cracking regenerator, after-fractionating tower, the second cooler and the second gas-liquid separator；
The outlet of described first riser, the import of described first settler and catalyst outlet, described first catalytic cracking regenerator, described first riser catalyst inlet sequentially connect, constitute the first catalyst regeneration reuse unit；
The outlet of described second riser, the import of described second settler and catalyst outlet, described second catalytic cracking regenerator, described second riser catalyst inlet sequentially connect, constitute the second catalyst regeneration reuse unit；
The oil gas vent of described first settler, the material inlet of described first fractionating column and gaseous phase outlet, described first cooler, the import of described first gas-liquid separator and liquid-phase outlet, the material inlet of described second riser and outlet, the import of described second settler and oil gas vent, the material inlet of described after-fractionating tower and gaseous phase outlet, described second cooler, described second gas-liquid separator sequentially connect.
2. device according to claim 1, it is characterised in that described device also includes the first catalyst pre-riser and the second catalyst pre-riser；
Described first catalyst pre-riser connects with the catalyst inlet of described first riser；
Described second catalyst pre-riser connects with the catalyst inlet of described second riser.
3. device according to claim 1, it is characterised in that described device also includes the 3rd fractionating device, connects with the gaseous phase outlet of the gaseous phase outlet of described first gas-liquid separator and described second gas-liquid separator simultaneously.
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| CN201521072147.8U CN205368261U (en) | 2015-12-21 | 2015-12-21 | Produce device of high propylene content cracked gas and low olefin(e) centent petrol |
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| CN201521072147.8U CN205368261U (en) | 2015-12-21 | 2015-12-21 | Produce device of high propylene content cracked gas and low olefin(e) centent petrol |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893609A (en) * | 2015-12-21 | 2017-06-27 | 中国石油天然气集团公司 | Produce the device and method of propylene content cracked gas high and gasoline with low olefine content |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893609A (en) * | 2015-12-21 | 2017-06-27 | 中国石油天然气集团公司 | Produce the device and method of propylene content cracked gas high and gasoline with low olefine content |
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Address after: 100007 Dongzhimen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: 100007 Dongzhimen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Petroleum Engineering & Construction Corp. Patentee before: China National Petroleum Corp. |
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Effective date of registration: 20190531 Address after: 100007 Dongzhimen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNPC EAST CHINA DESIGN INSTITUTE CO.,LTD. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: 100007 Dongzhimen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Patentee before: CHINA NATIONAL PETROLEUM Corp. |
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