CN115785999A - Method and system for producing gasoline and diesel oil from condensate oil - Google Patents
Method and system for producing gasoline and diesel oil from condensate oil Download PDFInfo
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- CN115785999A CN115785999A CN202211461421.5A CN202211461421A CN115785999A CN 115785999 A CN115785999 A CN 115785999A CN 202211461421 A CN202211461421 A CN 202211461421A CN 115785999 A CN115785999 A CN 115785999A
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Abstract
The invention relates to a method and a system for producing gasoline and diesel oil by condensate oil, belonging to the field of condensate oil processing. The system of the present invention comprises: the system comprises an atmospheric fractionation unit 1, a naphtha aromatization unit 2 and a wax oil cracking unit 3; a naphtha aromatization unit 2 is arranged behind the normal pressure fractionation unit 1; a wax oil cracking unit 3 is arranged behind the atmospheric fractionation unit 1; the cracking generated liquid 9 output by the wax oil cracking unit 3 returns to the normal pressure fractionation unit 1; the condensate oil 4 enters the system from the atmospheric fractionation unit 1; the naphtha 5 enters a naphtha aromatization unit 2 from an atmospheric fractionation unit 1, and the diesel 6 is extracted from the atmospheric fractionation unit 1; the wax oil 7 enters the wax oil cracking unit 3 from the atmospheric fractionation unit 1; the gasoline 8 is extracted from the naphtha aromatization unit 2. The invention effectively improves the yield of gasoline and diesel oil in condensate oil processing, meets the Euro III quality requirements of gasoline and diesel oil, and has the advantages of simple process flow, investment saving and stable operation.
Description
Technical Field
The invention belongs to the field of condensate oil processing, and particularly relates to a method and a system for producing gasoline and diesel oil by condensate oil.
Background
Since the paris agreement was in effect in 2019, countries and organizations in the european union, middle, daily, korean, american, and jia, etc. successively announced the goal of carbon neutralization, and countries increase the use of clean energy natural gas, and natural gas is used as clean energy for transition from traditional energy to new energy, so that global yield is further increased, and condensate yield is gradually increased with the increase of global natural gas yield.
Currently, condensate is mainly produced in catal, australia, equatorial guinea, libria, nigeria, usa, russia, indonesia and other countries, and is generally blended directly into crude oil blending or used as a chemical refinery feedstock to produce para-xylene.
In recent years the demand for on-site processing of condensate to produce automotive fuel oil has been addressed in southeast asia and african condensate main production.
The condensate oil has the main characteristics that: the API gravity is usually between 55 and 65, the sulphur content is between 0 and 0.03%, the naphtha fraction is between 40 and 60%, the diesel fraction is between 10 and 30%, and the fraction above 350 ℃ is between 0 and 10%.
CN101360807B discloses a method and equipment for separating hydrocarbon in a multistage cyclone evaporator with heating, which can solve the miniaturization of production equipment in an oil refinery and obtain high-quality petroleum products.
CN102807891B discloses a system and a method for processing condensate oil, wherein the system comprises a reduced pressure distillation tower arranged behind an atmospheric distillation tower, and a tower bottom reboiling furnace arranged at the bottom of the atmospheric distillation tower or the bottom of the reduced pressure distillation tower. The system and the method transfer a part of light fraction from the atmospheric distillation tower to the vacuum distillation tower for separation, transfer a part of heat load in the feeding heating furnace to the tower bottom reboiling furnace, and solve the processing difficulty of low heavy component content in the condensate oil processing process.
CN102876359B discloses a system and a method for processing condensate oil. This system has included preliminary distillation tower and atmospheric tower, and the preliminary distillation tower bottom is provided with the preliminary distillation tower reboiling stove, and the atmospheric tower bottom is provided with the atmospheric tower reboiling stove. The system and the method can solve the processing difficulty of high light hydrocarbon content in the condensate oil processing process, and are suitable for production devices without recovery requirements on liquefied gas products in the condensate oil.
The independent processing of the large-scale condensate oil is emphasized in China, and the defects that:
the condensate oil is limited by global capacity, marine transportation and trade of the condensate oil, and no single condensate oil refinery is put into operation at home at present;
the storage and transportation cost and the process loss of the gas field condensate are relatively high due to the high content of the volatile light components;
the condensate oil processing mainly adopts normal pressure fractionation and reduced pressure fractionation, the produced naphtha can not meet the quality requirement of the vehicle fuel oil, and the fraction with the temperature of more than 350 ℃ is generally used as the fuel oil with low added value.
The condensate oil producing place adopts the condensate oil to produce gasoline and diesel oil, can meet the requirement of local automotive fuel oil, and has the main difficulties that: the method comprises the following steps that firstly, the quality standard of the localized gasoline is met, the main quality index is research octane number (RON for short), and secondly, fractions with the temperature of more than 350 ℃ are converted into diesel fractions and gasoline fractions as far as possible; the process flow is simplified, and the investment is low.
Disclosure of Invention
The invention aims to solve the technical problem of how to provide a method and a system for producing gasoline and diesel oil by condensate oil so as to solve the problem of processing the vehicle fuel oil by the condensate oil.
In order to solve the technical problem, the invention provides a system for producing gasoline and diesel oil by condensate oil, which comprises: the system comprises an atmospheric fractionation unit 1, a naphtha aromatization unit 2 and a wax oil cracking unit 3;
a naphtha aromatization unit 2 is arranged behind the normal pressure fractionation unit 1;
a wax oil cracking unit 3 is arranged behind the atmospheric fractionation unit 1;
the cracking generated liquid 9 output by the wax oil cracking unit 3 returns to the normal pressure fractionation unit 1;
the condensate oil 4 enters the system from the atmospheric fractionation unit 1;
the naphtha 5 enters a naphtha aromatization unit 2 from an atmospheric fractionation unit 1, and the diesel oil 6 is pumped out of the system from the atmospheric fractionation unit 1; the wax oil 7 enters the wax oil cracking unit 3 from the atmospheric fractionation unit 1;
the gasoline 8 is extracted from the naphtha aromatization unit 2.
Further, the naphtha aromatization unit 2 adopts a double-series parallel fixed bed reactor, and the catalyst is regenerated on line through a reactor switching valve.
Further, the naphtha aromatization unit 2 adopts a non-hydrogenation fixed bed reaction process, the reaction temperature is 350-500 ℃, the operation pressure is 0.3-0.5MPag, and the catalyst regeneration period is about 60 days.
Further, the atmospheric fractionation unit 1 controls the operation temperature of the condensate 4 to 320 ℃ and the operation pressure to 0.03 to 0.06MPag.
Further, the wax oil cracking unit 3 adopts a non-hydrogen thermal cracking reaction process or a catalytic cracking process, the reaction temperature is 400-500 ℃, and the operation pressure is 0.3-0.5MPag.
The invention also provides a method for producing gasoline and diesel oil by using condensate oil, which comprises the following steps:
s1, condensate oil 5 and wax oil cracking generated liquid 9 enter an atmospheric fractionation unit 1, and liquid fractionation products comprise naphtha 5, diesel oil 6 and wax oil 7;
s2, fractionating a product diesel oil 6 by the normal pressure fractionation unit 1 and directly pumping out the product diesel oil as a product;
s3, introducing naphtha 5 into a naphtha aromatization unit 2, wherein the product is gasoline 8 and is extracted as a product;
s4, the wax oil 7 enters a wax oil cracking unit 3, the product is a cracking product liquid 9, and the cracking product liquid 9 is a mixture of gasoline fraction and diesel oil fraction;
and S5, the cracking generated liquid 9 generated by the wax oil cracking unit 3 is circulated and returned to the atmospheric distillation unit 1 for further fractionation, and naphtha 5 and diesel oil 6 are respectively pumped out of the atmospheric distillation unit 1.
Further, the naphtha aromatization unit 2 adopts a double-series parallel fixed bed reactor, and the catalyst is regenerated on line through a reactor switching valve.
Further, the naphtha aromatization unit 2 adopts a non-hydrogenation fixed bed reaction process, the reaction temperature is 350-500 ℃, the operation pressure is 0.3-0.5MPag, and the catalyst regeneration period is about 60 days.
Further, the atmospheric fractionation unit 1 controls the operation temperature of the condensate 4 to 320 ℃ and the operation pressure to 0.03 to 0.06MPag.
Further, the wax oil cracking unit 3 adopts a non-hydrogen thermal cracking reaction process or a catalytic cracking process, the reaction temperature is 400-500 ℃, and the operation pressure is 0.3-0.5MPag.
The invention provides a method and a system for producing gasoline and diesel oil by condensate oil, wherein a naphtha aromatization unit 2 is arranged behind an atmospheric fractionation unit 1, so that the octane number of naphtha can reach more than 90, and the effect of producing commercial gasoline is achieved; the problem of low octane number of naphtha is solved;
the wax oil cracking unit 3 is arranged behind the atmospheric fractionation unit 1, so that the wax oil 7 can be converted into diesel oil and gasoline, the proportion of heavy fuel oil produced by the system is less than 2%, and the effect of producing commercial diesel oil is achieved; solves the difficult point of heavy oil conversion of the fraction above 350 ℃.
The invention adopts the non-hydrogenation naphtha aromatization unit 2 and the wax oil cracking unit 3, thereby reducing the equipment investment and simplifying the process flow.
The invention provides a method and a system for producing gasoline and diesel oil by condensate oil, which effectively improve the yield of gasoline and diesel oil in condensate oil processing, meet the Europe III quality requirements of gasoline and diesel oil, have simple process flow, save investment and have stable operation.
Drawings
FIG. 1 is a block diagram of a system for producing gasoline and diesel from the condensate of the present invention.
Wherein, 1, a normal pressure fractionation unit; 2. a naphtha aromatization unit; 3. a wax oil cracking unit; 4. condensing oil; 5. naphtha; 6. diesel oil; 7. wax oil; 8. gasoline; 9. and (4) cracking to generate a liquid.
Detailed Description
In order to make the objects, contents and advantages of the present invention more apparent, the following detailed description of the present invention will be made in conjunction with the accompanying drawings and examples.
The invention relates to the field of condensate oil processing, in particular to a method and a system for producing vehicle fuel oil.
In order to solve the problems of processing the vehicle fuel oil by the condensate, the invention provides a method and a system for processing the condensate by combining atmospheric distillation, naphtha aromatization and wax oil cracking, which solve the processing difficulties that the octane number of naphtha fraction is low and heavy oil fraction is difficult to directly convert at the temperature of more than 350 ℃ in the condensate processing process, have simple process flow and greatly reduce the device investment and meet the requirements of small-scale development of the utilization of the condensate on localization.
The invention aims to provide a system for producing gasoline and diesel oil by condensate oil, which comprises an atmospheric fractionation unit 1, a naphtha aromatization unit 2 and a wax oil cracking unit 3;
a naphtha aromatization unit 2 is arranged behind the normal pressure fractionation unit 1;
a wax oil cracking unit 3 is arranged behind the atmospheric fractionation unit 1;
the cracking generated liquid 9 output by the wax oil cracking unit 3 returns to the normal pressure fractionation unit 1;
the condensate oil 4 enters the system from the atmospheric fractionation unit 1;
the naphtha 5 enters a naphtha aromatization unit 2 from an atmospheric fractionation unit 1, and the diesel 6 is extracted from the atmospheric fractionation unit 1; the wax oil 7 enters the wax oil cracking unit 3 from the atmospheric fractionation unit 1;
the gasoline 8 is extracted from the naphtha aromatization unit 2.
The invention also provides a method for producing gasoline and diesel oil by using condensate oil, which comprises the following steps:
after the atmospheric distillation tower unit 1, a naphtha aromatization unit 2 is arranged to convert naphtha 5 into aromatization gasoline 8 and improve the octane number;
a wax oil cracking unit 3 is arranged behind the atmospheric distillation tower unit 1, and fractions with the temperature of more than 350 ℃ are converted into cracking generated liquid 9 of mixed gasoline and diesel oil;
the method comprises the following steps:
s1, condensate oil 5 and wax oil cracking generated liquid 9 enter an atmospheric fractionation unit 1, and liquid fractionation products are naphtha 5, diesel oil 6 and wax oil 7;
s2, fractionating a product diesel oil 6 by the normal pressure fractionating unit 1 and directly pumping out the product diesel oil as a product;
s3, introducing naphtha 5 into a naphtha aromatization unit 2, wherein the product is high-octane gasoline 8 and is extracted as a product;
s4, the wax oil 7 enters a wax oil cracking unit 3, the product is a cracking resultant liquid 9, and the cracking resultant liquid 9 is a mixture of gasoline fraction and diesel fraction;
s5, the cracking generated liquid 9 generated by the wax oil cracking unit 3 is circulated back to the atmospheric fractionation unit 1 for further fractionation, and naphtha 5 and diesel oil 6 are respectively extracted from the atmospheric distillation unit 1.
Further, the normal pressure fractionation unit 1 controls the operation temperature of the condensate oil 4 to be 320-350 ℃ and the operation pressure to be 0.03-0.06MPag;
further, the naphtha aromatization unit 2 adopts a non-hydrogenation fixed bed reaction process, the reaction temperature is 350-500 ℃, the operation pressure is 0.3-0.5MPag, and the catalyst regeneration period is about 60 days;
further, the wax oil cracking unit 3 adopts a non-hydrogen thermal cracking reaction process or a catalytic cracking process, the reaction temperature is 400-500 ℃, and the operation pressure is 0.3-0.5MPag;
further, the naphtha aromatization unit 2 adopts a double-series parallel fixed bed reactor, and the catalyst can be regenerated on line through a switching valve of the reactor, so that continuous production operation can be realized.
And further, the fraction with the temperature of more than 350 ℃ enters a wax oil cracking unit 3, the cracking generated liquid 9 mainly comprises gasoline fraction and diesel oil fraction, and the gasoline fraction and the diesel oil fraction are circularly returned to the atmospheric fractionation unit 1 to realize product separation.
The invention has the following effects:
the naphtha aromatization unit 2 is arranged behind the atmospheric fractionation unit 1, so that the octane value of naphtha can reach more than 90, and the effect of producing commercial gasoline is achieved; the problem of low octane number of naphtha is solved;
the wax oil cracking unit 3 is arranged behind the atmospheric fractionation unit 1, so that the wax oil 7 can be converted into diesel oil and gasoline, the proportion of heavy fuel oil produced by the system is less than 2%, and the effect of producing commercial diesel oil is achieved; solves the difficult point of heavy oil conversion of the fraction above 350 ℃.
The invention adopts the non-hydrogenation naphtha aromatization unit 2 and the wax oil cracking unit 3, thereby reducing the equipment investment and simplifying the process flow.
The invention provides a method and a system for producing gasoline and diesel oil by condensate oil, which effectively improve the yield of gasoline and diesel oil in condensate oil processing, meet the Europe III quality requirements of gasoline and diesel oil, have simple process flow, save investment and have stable operation.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (10)
1. A system for producing gasoline and diesel from condensate, the system comprising: an atmospheric fractionation unit (1), a naphtha aromatization unit (2) and a wax oil cracking unit (3);
a naphtha aromatization unit (2) is arranged behind the atmospheric fractionation unit (1);
a wax oil cracking unit (3) is arranged behind the atmospheric fractionation unit (1);
the pyrolysis generated liquid (9) output by the wax oil cracking unit (3) returns to the normal pressure fractionation unit (1);
the condensate oil (4) enters the system from the atmospheric fractionation unit (1);
the naphtha (5) enters a naphtha aromatization unit (2) from an atmospheric fractionation unit (1), and the diesel oil (6) is extracted from the atmospheric fractionation unit (1) out of the system; the wax oil (7) enters a wax oil cracking unit (3) from the atmospheric fractionation unit (1);
the gasoline (8) is drawn from the naphtha aromatization unit (2).
2. The system for producing gasoline and diesel from condensate according to claim 1, wherein the naphtha aromatization unit (2) employs a double series of parallel fixed bed reactors, and the catalyst is regenerated on-line by a reactor switching valve.
3. The system for producing gasoline and diesel from condensate according to claim 2, wherein the naphtha aromatization unit (2) adopts a non-hydro fixed bed reaction process, the reaction temperature is 350-500 ℃, the operation pressure is 0.3-0.5MPag, and the catalyst regeneration period is about 60 days.
4. The system for the production of gasoline and diesel from condensate according to claim 1, characterized in that the atmospheric fractionation unit (1) controls the operating temperature of the condensate (4) to be 320-350 ℃ and the operating pressure to be 0.03-0.06MPag.
5. The system for producing gasoline and diesel from condensate according to claim 1, wherein the wax oil cracking unit (3) adopts a non-hydro thermal cracking reaction process or a catalytic cracking process, the reaction temperature is 400-500 ℃, and the operation pressure is 0.3-0.5MPag.
6. A method for producing gasoline and diesel oil by condensate oil is characterized by comprising the following steps:
s1, condensate oil (5) and wax oil cracking generated liquid (9) enter a normal pressure fractionation unit (1), and liquid fractionation products comprise naphtha (5), diesel oil (6) and wax oil (7);
s2, fractionating a product diesel oil (6) by the normal pressure fractionating unit (1) and directly pumping out the diesel oil as a product;
s3, feeding the naphtha (5) into a naphtha aromatization unit (2), wherein the product is gasoline (8) and is extracted as a product;
s4, enabling the wax oil (7) to enter a wax oil cracking unit (3), wherein the product is a cracking generated liquid (9), and the cracking generated liquid (9) is a mixture of gasoline fraction and diesel fraction;
and S5, returning the pyrolysis generated liquid (9) generated by the wax oil cracking unit (3) to the atmospheric fractionation unit (1) for further fractionation in a circulating manner, and pumping out naphtha (5) and diesel (6) from the atmospheric distillation unit (1) respectively.
7. The process for the production of gasoline and diesel by condensate according to claim 6, characterized in that the naphtha aromatization unit (2) employs a double series of parallel fixed bed reactors, and the catalyst is regenerated on-line by means of reactor switching valves.
8. The system for producing gasoline and diesel oil from condensate according to claim 7, wherein the naphtha aromatization unit (2) adopts a non-hydrogenation fixed bed reaction process, the reaction temperature is 350-500 ℃, the operation pressure is 0.3-0.5MPag, and the catalyst regeneration period is about 60 days.
9. The system for the production of gasoline and diesel from condensate according to claim 6, characterized in that the atmospheric fractionation unit (1) controls the operating temperature of the condensate (4) to be 320-350 ℃ and the operating pressure to be 0.03-0.06MPag.
10. The system for producing gasoline and diesel from condensate as claimed in claim 6, wherein the wax oil cracking unit (3) adopts a non-hydro thermal cracking reaction process or a catalytic cracking process, the reaction temperature is 400-500 ℃, and the operation pressure is 0.3-0.5MPag.
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| CN202211461421.5A CN115785999A (en) | 2022-11-21 | 2022-11-21 | Method and system for producing gasoline and diesel oil from condensate oil |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5242576A (en) * | 1991-11-21 | 1993-09-07 | Uop | Selective upgrading of naphtha fractions by a combination of reforming and selective isoparaffin synthesis |
| CN101045884A (en) * | 2006-03-31 | 2007-10-03 | 中国石油化工股份有限公司 | Process of producing clean diesel oil and low carbon olefin with residual oil and heavy fraction oil |
| CN101314731A (en) * | 2007-05-31 | 2008-12-03 | 中国石油化工股份有限公司 | Aromatization method without hydrogen for light hydrocarbon |
| CN101497816A (en) * | 2008-01-31 | 2009-08-05 | 中国石油化工股份有限公司 | Non-hydrogenation aromatization upgrading method for naphtha |
| CN102807891A (en) * | 2011-05-30 | 2012-12-05 | 中国石油化工集团公司 | System and method for processing condensate oil |
| CN114437792A (en) * | 2020-10-30 | 2022-05-06 | 中国石油化工股份有限公司 | Method and apparatus for processing residual oil |
-
2022
- 2022-11-21 CN CN202211461421.5A patent/CN115785999A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5242576A (en) * | 1991-11-21 | 1993-09-07 | Uop | Selective upgrading of naphtha fractions by a combination of reforming and selective isoparaffin synthesis |
| CN101045884A (en) * | 2006-03-31 | 2007-10-03 | 中国石油化工股份有限公司 | Process of producing clean diesel oil and low carbon olefin with residual oil and heavy fraction oil |
| CN101314731A (en) * | 2007-05-31 | 2008-12-03 | 中国石油化工股份有限公司 | Aromatization method without hydrogen for light hydrocarbon |
| CN101497816A (en) * | 2008-01-31 | 2009-08-05 | 中国石油化工股份有限公司 | Non-hydrogenation aromatization upgrading method for naphtha |
| CN102807891A (en) * | 2011-05-30 | 2012-12-05 | 中国石油化工集团公司 | System and method for processing condensate oil |
| CN114437792A (en) * | 2020-10-30 | 2022-05-06 | 中国石油化工股份有限公司 | Method and apparatus for processing residual oil |
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