CN1740274A - Direct delayed coking process of heavy raw oil - Google Patents
Direct delayed coking process of heavy raw oil Download PDFInfo
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- CN1740274A CN1740274A CN 200510093276 CN200510093276A CN1740274A CN 1740274 A CN1740274 A CN 1740274A CN 200510093276 CN200510093276 CN 200510093276 CN 200510093276 A CN200510093276 A CN 200510093276A CN 1740274 A CN1740274 A CN 1740274A
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- oil
- coke
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- tower
- delayed coking
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Abstract
The present invention is direct delayed coking process of heavy raw oil. In the delayed coking plant, the heavy raw oil is made to mix with self-produced light oil for heat exchange, heavy oil is pumped from the bottom of the fractioning tower, pressurized to heating furnace for fast heating and fed to the coke tower, fractioned gas, gasoline, diesel oil and wax oil are separated out from the top of the fractioning tower. By means of communication distilling technology and delayed coking technology, atmospheric and vacuum distillation unit and delayed coking unit are combined into one plant, heavy raw oil is fed to the fractioning tower of the coking plant, and the fractioning tower is used to fractionate the fraction oil from the coking reaction and fractionate the light component of the raw oil. The present invention has simplified process, simple operation, and low production cost.
Description
Technical field:
The present invention relates to a kind of refining of petroleum method of refining of petroleum, particularly a kind of direct delayed coking process of heavy raw oil.
Background technology:
The common technological line of the existing coking production of refinery is generally: crude oil → normal (subtracting) presses normal (the subtracting) of distilling → separating to press residual oil → (viscosity breaking) → delayed coking.The crude oil lower for light oil content, that the heavy crude composition is more, if produce refinery coke, this Crude Oil Processing complexity, energy consumption height, operation easier is big, has improved production cost.
Technical scheme:
The object of the present invention is to provide a kind of direct delayed coking process of heavy raw oil, refinery coke is produced in its heavy crude lighting, and the course of processing is fairly simple, simplify work flow, reduce heavy crude and produce the technology of refinery coke process, simple to operate, reduced production cost.
The object of the present invention is achieved like this:
1, heavy crude is delivered to hold-up vessel, carries out sedimentation, dehydration;
2, enter delayed coking unit and its self-produced light-end products mix after, carry out about 145 degree of heat exchange and mix with water and medicament and carry out desalination, dehydration;
3, the crude oil through the desalination cylinder continues to enter cushion dashpot behind about 250 degree of heat exchange, part light-end products and water distillate from the top, boost after all the other oil products are extracted out by cylinder bottom portion and continue to enter separation column and contact behind about 300 degree of heat exchange from the next high-temperature oil gas of coke tower, the light-end products that wherein carry are gone out by fractionation, heavy oil product with have heavy oil product to mix after fall into separation column at the bottom of;
4, heat up in a steamer heavy oil at the bottom of the tower and extract out at the bottom of the tower after, deliver to process furnace through pressurization and be rapidly heated and enter coke tower, high temperature, cracking, condensation, generate gas, gasoline, fraction of diesel oil, wax oil fraction and coke, remove coke and stay in the tower, other product distillates to separation column from cat head.
5, high temperature 400 degree oil gas carry out mass transfer, heat transfer with mink cell focus in separation column, distillate gas (dry gas and liquefied gas), gasoline, fraction of diesel oil, wax oil fraction at cat head, and mink cell focus mixes the back and sinks as going at the bottom of the tower with heavy feed stock, thus formation running balance;
6, after a coke collection is full, the High Temperature and Heavy Oil that process furnace is next is cut and is carried out green coke in another coke drum, and the coke that collection is full is removed, and is standby as next cycle.The present invention is because after directly having adopted the self-produced light-end products of delayed coking unit and its to mix, carry out heat exchange, after heavy oil at the bottom of the separation column is extracted out at the bottom of the tower, deliver to process furnace through pressurization and be rapidly heated and enter coke tower,, simplify work flow at fractionation cat head distillate gas body (dry gas and liquefied gas), gasoline, fraction of diesel oil, wax oil fraction, reduce heavy crude and produce the technology of refinery coke process, simple to operate, reduced production cost, be well suited for field popularization application.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Further specify below in conjunction with accompanying drawing.
Embodiment
As shown in the figure, direct delayed coking process of heavy raw oil is made up of following steps
1, heavy crude is delivered to hold-up vessel, carries out sedimentation, dehydration;
2, enter delayed coking unit and its self-produced light-end products mix after, carry out about 145 degree of heat exchange and mix with water and medicament and carry out desalination, dehydration;
3, the crude oil through the desalination cylinder continues to enter cushion dashpot behind about 250 degree of heat exchange, part light-end products and water distillate from the top, boost after all the other oil products are extracted out by cylinder bottom portion and continue to enter separation column and contact behind about 300 degree of heat exchange from 400 next degree high-temperature oil gas of coke tower, the light-end products that wherein carry are gone out by fractionation, heavy oil product with have heavy oil product to mix after fall into separation column at the bottom of;
4, after the heavy oil at the bottom of the separation column is extracted out at the bottom of the tower, deliver to be rapidly heated 500 degree and enter coke tower, high temperature, cracking of process furnace through pressurization 2.5MPa, condensation, generate gas, gasoline, fraction of diesel oil, wax oil fraction and coke, remove coke and stay in the tower, other product distillates to separation column from cat head.
5, high temperature 400 degree oil gas carry out mass transfer, heat transfer with mink cell focus in separation column, distillate gas (dry gas and liquefied gas), gasoline, fraction of diesel oil, wax oil fraction at cat head, and mink cell focus mixes the back and sinks as going at the bottom of the tower with heavy feed stock, thus formation running balance;
6, after a coke collection is full, the High Temperature and Heavy Oil that process furnace is next is cut and is carried out green coke in another coke drum, and the coke that collection is full is removed, and is standby as next cycle.Utilize common distillation technique and delayed coking technology, atmospheric and vacuum distillation unit and delayed coking unit are combined as a covering device, make heavy crude directly enter the separation column of coker, this tower is the distillate after the fractionation pyrogenic reaction, the light constituent of fractionation crude oil again, a tower dual-purpose.Have normal (subtracting) simultaneously and press distillation and delayed coking function.
Claims (1)
1, a kind of direct delayed coking process of heavy raw oil is characterized in that:
(1) heavy crude is delivered to hold-up vessel, carries out sedimentation, dehydration;
(2) enter delayed coking unit and its self-produced light-end products mix after, carry out about 145 degree of heat exchange and mix with water and medicament and carry out desalination, dehydration;
(3) crude oil through the desalination cylinder continues to enter cushion dashpot behind about 250 degree of heat exchange, part light-end products and water distillate from the top, boost after all the other oil products are extracted out by cylinder bottom portion and continue to enter separation column and contact behind about 300 degree of heat exchange from the next high-temperature oil gas of coke tower, the light-end products that wherein carry are gone out by fractionation, heavy oil product with have heavy oil product to mix after fall into separation column at the bottom of;
(4), after the heavy oil at the bottom of the separation column extracts out at the bottom of the tower, deliver to process furnace through pressurization and be rapidly heated and enter coke tower, high temperature, cracking, condensation, generate gas, gasoline, fraction of diesel oil, wax oil fraction and coke, remove coke and stay in the tower, other product distillates to separation column from cat head.
(5) high-temperature oil gas is carried out mass transfer, heat transfer with mink cell focus in the separation column, distillates gas (dry gas and liquefied gas), gasoline, fraction of diesel oil, wax oil fraction at cat head, and mink cell focus mixes the back and sinks as going at the bottom of the tower with heavy feed stock, thus formation running balance;
(6), after a coke collection is full, the High Temperature and Heavy Oil that process furnace is come is cut and is carried out green coke in another coke drum, the coke that collection is full is removed, and is standby as next cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510093276 CN1740274A (en) | 2005-08-24 | 2005-08-24 | Direct delayed coking process of heavy raw oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510093276 CN1740274A (en) | 2005-08-24 | 2005-08-24 | Direct delayed coking process of heavy raw oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1740274A true CN1740274A (en) | 2006-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510093276 Pending CN1740274A (en) | 2005-08-24 | 2005-08-24 | Direct delayed coking process of heavy raw oil |
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| CN (1) | CN1740274A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504864A (en) * | 2011-10-26 | 2012-06-20 | 中国石油化工股份有限公司 | Novel process for treating thrown oil of coking towers and device thereof |
| CN106433740A (en) * | 2016-11-08 | 2017-02-22 | 中石化炼化工程（集团）股份有限公司 | Delayed coking method and apparatus for heavy oil |
| CN106753542A (en) * | 2017-01-19 | 2017-05-31 | 上海英保能源化工科技有限公司 | Inferior heavy oil desalting processing method |
-
2005
- 2005-08-24 CN CN 200510093276 patent/CN1740274A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504864A (en) * | 2011-10-26 | 2012-06-20 | 中国石油化工股份有限公司 | Novel process for treating thrown oil of coking towers and device thereof |
| CN102504864B (en) * | 2011-10-26 | 2014-12-17 | 中国石油化工股份有限公司 | Novel process for treating thrown oil of coking towers and device thereof |
| CN106433740A (en) * | 2016-11-08 | 2017-02-22 | 中石化炼化工程（集团）股份有限公司 | Delayed coking method and apparatus for heavy oil |
| CN106753542A (en) * | 2017-01-19 | 2017-05-31 | 上海英保能源化工科技有限公司 | Inferior heavy oil desalting processing method |
| CN106753542B (en) * | 2017-01-19 | 2019-03-01 | 上海竣铭化工工程设计有限公司 | Inferior heavy oil desalting processing method |
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