CN1022763C - Steam cracking technology for heavy oil - Google Patents
Steam cracking technology for heavy oil Download PDFInfo
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- CN1022763C CN1022763C CN 91106288 CN91106288A CN1022763C CN 1022763 C CN1022763 C CN 1022763C CN 91106288 CN91106288 CN 91106288 CN 91106288 A CN91106288 A CN 91106288A CN 1022763 C CN1022763 C CN 1022763C
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Abstract
The present invention relates to a steam cracking technology suitable for lightening heavy oil in petroleum processing. The technology has the technical characteristic that heat conversion is carried out under the condition that oil-gas differential pressure is lowered to a value corresponding to distillation by pressure reduction in a reactor. The technology has the advantages of mild operation condition, low operating cost, simple process, less investment and good quality of products.
Description
The present invention relates to a kind of refining of petroleum method, be suitable for light materialization of heavy oil, be specifically related to a kind of steam cracking technology for heavy oil.
Existing heavy oil hydroprocessing process can be summarized as thermal transition, hydrocracking and catalytic cracking three major types.Hydrocracking and catalytic cracking reach the cracked purpose by means of hydrogen and catalyzer respectively, but flow process is complicated, invest huge, the process cost height.Though less investments such as thermal conversion process such as thermally splitting, viscosity breaking, delayed coking, technology are simply ripe, only depend on high temperature to produce cracking reaction, feasible requirement to operational condition becomes very harsh, and quality product is relatively poor, needs further processing or refining.In recent years, the Wu Yu and the thousand Dai Tian companies of Japan have developed a kind of Ureka process cooperatively, and this technology and this technology are close, but temperature of reaction is higher, and quality product is relatively poor.
The objective of the invention is to provide a kind of cracking conditions to relax, process cost is low, and technical process is simple, and the heavy oil cracking technology that less investment, quality product are new preferably makes mink cell focus produce thermal transition by means of superheated vapour.
The object of the present invention is achieved like this:
Steam cracking technology for heavy oil of the present invention comprises the heating of stock oil process furnace, the process furnace of steam is overheated, the stock oil cracking, the cracked thermal conversion processes is carried out in reactor, thermal transition is that the oil gas dividing potential drop is reduced under the condition that is equivalent to underpressure distillation and carries out in reactor, and the liquid in the reactor is in full back-mixing state.
The time that the stock oil of steam cracking technology for heavy oil of the present invention stops in reactor, temperature of reaction was 350-480 ℃ greater than half an hour, and reaction is carried out under normal pressure.
When heavy raw oil of the present invention is heated to the temperature of beginning cracking reaction in pipe, under certain pressure, enter in the special reactor, reactor lower part is introduced the superheated vapour more than 450 ℃, its quantity is enough to make the interior oil gas dividing potential drop of reactor to drop to the condition that is equivalent to underpressure distillation, enter the just vaporization rapidly of a part of raw material of reactor like this, cracking section does not then stop in reactor, because reactor has kept being enough to make heavy raw oil cracked temperature, make fully cracking of stock oil, again because the liquid in the reactor is in full back-mixing state, therefore, avoided coking.
Below in conjunction with accompanying drawing technology of the present invention is elaborated.1 is the stock oil oil pump among the figure, with it mink cell focus is sent into process furnace 3, is heated to 420 ℃, enters the top of reactor 4 then.The full steam boiler 2 that closes will be satisfied and be closed steam and send, and make steam superheating to 500 ℃ through the convection zone of process furnace 3, then enter the bottom of reactor 4, and stock oil stopped in reactor 100 minutes, and temperature of reaction is 380-400 ℃, and the pressure of reactor is a normal atmosphere.The reaction oil gas that comes out in reactor 4 tops enters separation column 5, is divided into gasoline, diesel oil, wax oil at last.As the blending component of commercial gasoline and diesel oil, wax oil is as the raw material of catalytic cracking after making with extra care for gasoline and diesel oil, and reaction Residual oil autoreactor bottom throws away, and makes oil fuel or petroleum pitch.
It is simple that steam cracking technology for heavy oil of the present invention has flow process, less investment, and liquid is received high, the light height of receiving, adaptability to raw material is strong, and good product quality is suitable for processing the inferior feedstock oil and the mink cell focus that comprise viscous crude.
Claims (2)
1, a kind of mink cell focus steam cracking method comprises the heating of stock oil process furnace, and the process furnace of steam is overheated, and the stock oil cracking is characterized in that:
A, cracked thermal conversion processes are carried out in reactor, and the residence time of stock oil, temperature of reaction was 350-480 ℃ greater than half an hour, and reaction is carried out under normal pressure,
B, thermal transition are that the oil gas dividing potential drop is reduced under the condition that is equivalent to underpressure distillation and carries out in reactor, and this condition is because reactor lower part is introduced the superheated vapour more than 450 ℃ of some amount and caused,
Liquid in C, the reactor is in full back-mixing state.
2, as said mink cell focus steam pyrolysis method in the claim 1, it is characterized in that the time that stock oil stops is 100 minutes in reactor, temperature of reaction is 380-400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106288 CN1022763C (en) | 1991-11-08 | 1991-11-08 | Steam cracking technology for heavy oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106288 CN1022763C (en) | 1991-11-08 | 1991-11-08 | Steam cracking technology for heavy oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1061989A CN1061989A (en) | 1992-06-17 |
| CN1022763C true CN1022763C (en) | 1993-11-17 |
Family
ID=4907722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91106288 Expired - Fee Related CN1022763C (en) | 1991-11-08 | 1991-11-08 | Steam cracking technology for heavy oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1022763C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102686708B (en) * | 2009-09-18 | 2016-04-20 | 东洋工程株式会社 | At well site place partly by the method for heavy oil modification |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338178C (en) * | 2005-10-08 | 2007-09-19 | 中国海洋石油总公司 | Heavy oil decarbonizing process |
| CN104531201A (en) * | 2014-12-03 | 2015-04-22 | 何巨堂 | Method for preparing light oil from hydrocarbon material flows containing heavy oil |
| CN109399888B (en) * | 2017-08-15 | 2021-12-17 | 中国石油化工股份有限公司 | Method and device for continuous desalting and dewatering of oily sludge |
-
1991
- 1991-11-08 CN CN 91106288 patent/CN1022763C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102686708B (en) * | 2009-09-18 | 2016-04-20 | 东洋工程株式会社 | At well site place partly by the method for heavy oil modification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1061989A (en) | 1992-06-17 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |