CN101982524A - Delayed coking furnace - Google Patents
Delayed coking furnace Download PDFInfo
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- CN101982524A CN101982524A CN2010105547524A CN201010554752A CN101982524A CN 101982524 A CN101982524 A CN 101982524A CN 2010105547524 A CN2010105547524 A CN 2010105547524A CN 201010554752 A CN201010554752 A CN 201010554752A CN 101982524 A CN101982524 A CN 101982524A
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Abstract
The invention relates to a delayed coking furnace, which comprises a furnace body, a convection chamber, a radiant chamber, furnace tubes, a furnace tube hanger and burners, wherein the convection chamber is arranged above the radiant chamber, and the furnace tubes are horizontally arranged in the convection chamber; the furnace tube hanger is arranged in the middle part of the radiant chamber, divides the radiant chamber into two symmetrical regions, and provided with the horizontally-arranged furnace tubes which are connected mutually by bends, the inner wall of the radiant chamber is also provided with the horizontally-arranged furnace tubes, and the horizontally-arranged furnace tubes are integrated by bends; the burners are located at the bottom (against the wall of furnace) of the two symmetrical regions of the radiant chamber and uniformly arranged along the axial direction of the furnace tube in the radiant chamber; a guide baffle plate is arranged on the inner wall of the middle part of the radiant chamber; the concentric diameter protection is performed on the furnace tubes of the furnace tube hanger arranged in the upper part of the radiant chamber in advance in the front of the bend at the position near an oil outlet, and at least two concentric diameter-expanded furnace tubes subjected to diameter change are obtained. Under the premise of not changing the overall structure of the existing coking furnace, the delayed coking furnace improves the heat transfer efficiency, and increases handling capacity of existing heating furnaces by at least 20 to 30 percent, and doubling the cycle of operation.
Description
Technical field
The present invention relates to a kind of process furnace, particularly be used to heat the delay coking heating furnace of mink cell focus in the refining of petroleum.
Background technology
Delayed coking is a kind of oil secondary processing technology, is meant that the mink cell focus with poor hydrogen is a raw material, carries out the thermally splitting and the condensation reaction of the degree of depth, the technology of process gas, gasoline, diesel oil, wax oil and coke at high temperature (about 500 ℃).So-called postpone to be meant that heating is warming up to the pyrogenic reaction temperature rapidly through process furnace with coking oil (stock oil and turning oil), green coke not in reaction boiler tube carries out pyrogenic reaction again and enter coke drum, so delayed action is arranged, is called the delayed coking technology.
Because crude oil in China generally lays particular stress on, and the wax content height, the yield of diesel oil is low, and the diesel oil distillate yield of domestic crude oil is than on average low 5～7 percentage points of external crude oil.In addition, because China's oil refining enterprise secondary processing is all based on catalytic cracking, diesel and gasoline ratio low (delayed coking is 1.94, and catalytic cracking is 0.56), so delayed coking is to solve diesel and gasoline ratio imbalance between supply and demand, the effective way of increasing output of diesel oil.
After the neutron level gage came into operation, greatly improved in the utilized space of coke drum, and coking furnace has become " bottleneck " of the whole device amount of carrying.At present coking furnace expand can technological transformation one be adopt convection tubes as radiator tube to enlarge the radiative transfer area, but the convection tubes heat transfer coefficient is little, effective rate of utilization is not high, the 2nd, utilize the existing bigger characteristics of single side radiation heating furnace volume, set up boiler tube at burner hearth bottom, this method can to a certain degree improve the radiative transfer area, but because the burner hearth bottom space is limited, the bottom is set up the boiler tube radical and is restricted.
Summary of the invention
The technical problem to be solved in the present invention is to improve the boiler tube hot strength to distribute, and avoids flame to lick pipe and causes managing interior coking, improves the treatment capacity purpose thereby be implemented in the labour radiation furnace.
The present invention solves the technical scheme that its technical problem takes:
A kind of delay coking heating furnace comprises body of heater, convection chamber, radiation chamber, boiler tube, boiler tube suspension bracket, burner, it is characterized in that convection chamber is arranged on the top of radiation chamber, and boiler tube is horizontally arranged in the convection chamber; The boiler tube suspension bracket is arranged on radiation chamber middle part, and radiation chamber is divided into two symmetrical regions, and the boiler tube suspension bracket is provided with horizontal boiler tube and is connected with each other by elbow, horizontal boiler tube also is installed on the radiation chamber inwall and is connected as a single entity by elbow; Burner is positioned at leaning on bottom the furnace wall of radiation chamber two symmetrical regions, along axially evenly being provided with of boiler tube in the radiation chamber; Radiation chamber middle part inwall is provided with flow apron, and boiler tube on the radiation chamber inwall and flame are separated; The boiler tube that the boiler tube suspension bracket is positioned at the radiation chamber internal upper part carries out concentric hole enlargement in advance in the position less than oil outlet before elbow, the concentric hole enlargement boiler tube behind the reducing has two at least.
The present invention adopts concentric reducer to carry out the hole enlargement of boiler tube, and the boiler tube hole enlargement before and after the hole enlargement is than greater than 1, less than 2, and the boiler tube inside diameter ranges before the hole enlargement is preferred 82-141mm, and the boiler tube inside diameter ranges after the hole enlargement is preferred 102-141mm.
For overcoming the stress rupture due to the boiler tube suspension bracket vertical direction thermal expansion displacement, boiler tube suspension bracket main part of the present invention is the Y type, the bottom is " word " type, " word " type bottom of boiler tube suspension bracket also is laid with boiler tube, its position is between burner and the middle boiler tube of radiation chamber, and it is 0 ~ 6 that boiler tube lays number.
For guaranteeing the stability of boiler tube, the number of above-mentioned boiler tube suspension bracket is 2-3, along axially evenly being provided with of boiler tube in the radiation chamber.
Directly pounce on boiler tube and make the inner coking of boiler tube for preventing thermal-flame, flow apron is not less than 3m apart from the furnace bottom height, the said burner outlet can be tilted to the furnace wall direction, be that intersect burner longitudinal axis and furnace wall, also can press close to the furnace wall, make the inner coking of boiler tube to prevent thermal-flame from directly pouncing on boiler tube.
Burner hearth intermediary boiler tube of the present invention adopts two-sided radiating furnace tube, to increase counter-fire face boiler tube surface-area and heat transfer efficiency.
The present invention has following advantage:
1, keeping under the constant prerequisite of existing biography coking furnace overall structure, utilize the existing bigger characteristics of single side radiation process furnace burner hearth volume, in the middle of the coking furnace burner hearth, bottom and top utilize the boiler tube suspension bracket to set up boiler tube, the suffered radiation of boiler tube is two-sided radiation in the middle of making, improved heat transfer quantity and heat transfer efficiency, can make the treatment capacity that increases 20-30% at the labour process furnace at least.
2, paste the wall combustion technology by adopting, press close to the furnace wall burner is set, and set up flow apron, improve side wall boiler tube hot strength and distribute, avoid flame to lick pipe and cause managing interior coking in side wall boiler tube bottom, thereby, can make at the labour process furnace to prolong one times the cycle of operation.
The method of 3, employing, boiler tube hole enlargement and increase boiler tube quantity can prolong conventional delay coking stove medium at 430 ℃ of later residence time, minimizing outlet of still temperature drop, thereby reach the purpose that reduces the coke yield coefficient.
4, changed traditional boiler tube arrangement mode, under the high-temperature field of burner hearth, increased the heating intensity of raw material, thereby improved the heating back residence time of oil product in the low temperature field burner hearth, the dehydrogenative condensation reaction and the high temperature decarburizing reaction that make mink cell focus be taken place in heating furnace tube partly become cracking and hydrogen transfer reactions, can voluminous gasoline and diesel oil, reduced cheap gas and coke output simultaneously.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a schematic side view of the present invention.
Fig. 3 is the synoptic diagram before and after the boiler tube hole enlargement of the present invention.
Among the figure, 1. convection chamber; 2. opening for feed; 3. discharge port; 4. concentric hole enlargement boiler tube; 5. radiation chamber; 7.Y type boiler tube suspension bracket; 8. flow apron; 9. boiler tube; 10. burner; 11. chimney; 12. elbow; 13. reducing concentric reducer.
Embodiment
Describe concrete structure of the present invention in detail below in conjunction with accompanying drawing and case study on implementation.
Referring to Fig. 1 to Fig. 3, convection chamber 1 of the present invention is arranged on the top of radiation chamber 5, and it is 11480mm that convection coil 9, the useful length of convection coil are horizontally arranged in it.High 5583 mm in radiation chamber bottom, wide 4764 mm in bottom, high 1292 mm of oblique top, wide 2180 mm in top, furnace superintendent 11480mm.
Boiler tube suspension bracket 7 is arranged on radiation chamber 5 middle parts, and radiation chamber 5 is divided into two symmetrical regions.Aforementioned boiler tube suspension bracket 7 main parts are the Y type, and the bottom is " word " type, has three, along axially evenly being provided with of boiler tube in the radiation chamber 5.Boiler tube suspension bracket 7 is provided with horizontal boiler tube and is connected with each other by elbow, and " word " type bottom of boiler tube suspension bracket 7 also is laid with boiler tube, and its position is between burner and the middle boiler tube of radiation chamber.Horizontal boiler tube also is installed on radiation chamber 5 inwalls and is connected as a single entity by elbow.
The existing coking furnace treatment capacity of present embodiment has increased by 34.7%, has realized increasing substantially the purpose of treatment capacity under the constant prerequisite of body of heater overall structure.
Claims (8)
1. a delay coking heating furnace comprises body of heater, convection chamber, radiation chamber, boiler tube, boiler tube suspension bracket, burner, it is characterized in that convection chamber is arranged on the top of radiation chamber, and boiler tube is horizontally arranged in the convection chamber; The boiler tube suspension bracket is arranged on radiation chamber middle part, and radiation chamber is divided into two symmetrical regions, and the boiler tube suspension bracket is provided with horizontal boiler tube and is connected with each other by elbow, horizontal boiler tube also is installed on the radiation chamber inwall and is connected as a single entity by elbow; Burner is positioned at leaning on bottom the furnace wall of radiation chamber two symmetrical regions, along axially evenly being provided with of boiler tube in the radiation chamber; Radiation chamber middle part inwall is provided with flow apron, and boiler tube on the radiation chamber inwall and flame are separated; The boiler tube that the boiler tube suspension bracket is positioned at the radiation chamber internal upper part carries out concentric hole enlargement in advance in the position less than oil outlet before elbow, the concentric hole enlargement boiler tube behind the reducing has two at least.
2. delay coking heating furnace according to claim 1 is characterized in that adopting concentric reducer to carry out the hole enlargement of boiler tube, protects boiler tube hole enlargement before and after the footpath than greater than 1, less than 2.
3. according to the described delay coking stove of claim 2, it is characterized in that the boiler tube inside diameter ranges before the reducing is 82-141mm, the boiler tube inside diameter ranges behind the reducing is 102-141mm.
4. according to claim 1 or 2 or 3 described delay coking heating furnaces, it is characterized in that boiler tube suspension bracket main part is the Y type, the bottom is " word " type.
5. delay coking heating furnace according to claim 4, the number that it is characterized in that the boiler tube suspension bracket are 2-3, along axially evenly being provided with of boiler tube in the radiation chamber.
6. delay coking heating furnace according to claim 4 is characterized in that boiler tube is also laid in " word " type bottom of boiler tube suspension bracket, and its position is between burner and the middle boiler tube of radiation chamber, and it is 0 ~ 6 that boiler tube lays number.
7. according to claim 1 or 2 or 3 described delay coking heating furnaces, it is characterized in that flow apron is not less than 3m apart from the furnace bottom height.
8. according to claim 1 or 2 or 3 described delay coking heating furnaces, it is characterized in that burner outlet can tilt to the furnace wall direction, promptly intersect burner longitudinal axis and furnace wall, also can press close to the furnace wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010554752 CN101982524B (en) | 2010-11-23 | 2010-11-23 | Delayed coking furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010554752 CN101982524B (en) | 2010-11-23 | 2010-11-23 | Delayed coking furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101982524A true CN101982524A (en) | 2011-03-02 |
| CN101982524B CN101982524B (en) | 2013-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010554752 Active CN101982524B (en) | 2010-11-23 | 2010-11-23 | Delayed coking furnace |
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| Country | Link |
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| CN (1) | CN101982524B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103965944A (en) * | 2014-05-04 | 2014-08-06 | 何巨堂 | Heating furnace for wide-cut hydrocarbon material rich in colloidal asphalt components |
| CN107860225A (en) * | 2017-11-17 | 2018-03-30 | 北京拓首能源科技股份有限公司 | A kind of U-shaped heat transfer coils heating furnace |
| CN110878218A (en) * | 2018-09-06 | 2020-03-13 | 中国石化工程建设有限公司 | Method for heating delayed coking raw material |
| EP3750974A1 (en) * | 2019-06-12 | 2020-12-16 | INDIAN OIL CORPORATION Ltd. | A delayed coking furnace for heating coker feedstock |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2382722Y (en) * | 1999-07-08 | 2000-06-14 | 中国石油化工集团公司 | Delay coking heating furnace having bottom layed furnace pipe structure |
| CN201288164Y (en) * | 2008-10-11 | 2009-08-12 | 肖家治 | Single-sided radiation coking furnace with expansion tube structure |
| CN201293545Y (en) * | 2008-11-03 | 2009-08-19 | 北京拓首科技发展有限公司 | Novel horizontal pipe double face radiant tube type heating-furnace |
-
2010
- 2010-11-23 CN CN 201010554752 patent/CN101982524B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2382722Y (en) * | 1999-07-08 | 2000-06-14 | 中国石油化工集团公司 | Delay coking heating furnace having bottom layed furnace pipe structure |
| CN201288164Y (en) * | 2008-10-11 | 2009-08-12 | 肖家治 | Single-sided radiation coking furnace with expansion tube structure |
| CN201293545Y (en) * | 2008-11-03 | 2009-08-19 | 北京拓首科技发展有限公司 | Novel horizontal pipe double face radiant tube type heating-furnace |
Non-Patent Citations (1)
| Title |
|---|
| 胡宪法: "方箱管式加热炉炉内的强化传热研究", 《华中科技大学硕士学位论文》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103965944A (en) * | 2014-05-04 | 2014-08-06 | 何巨堂 | Heating furnace for wide-cut hydrocarbon material rich in colloidal asphalt components |
| CN107860225A (en) * | 2017-11-17 | 2018-03-30 | 北京拓首能源科技股份有限公司 | A kind of U-shaped heat transfer coils heating furnace |
| CN110878218A (en) * | 2018-09-06 | 2020-03-13 | 中国石化工程建设有限公司 | Method for heating delayed coking raw material |
| EP3750974A1 (en) * | 2019-06-12 | 2020-12-16 | INDIAN OIL CORPORATION Ltd. | A delayed coking furnace for heating coker feedstock |
| US11149207B2 (en) * | 2019-06-12 | 2021-10-19 | Indian Oil Corporation Limited | Delayed coking furnace for heating coker feedstock |
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| Publication number | Publication date |
|---|---|
| CN101982524B (en) | 2013-05-01 |
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