CN202152332U - Heating furnace with guide plates - Google Patents
Heating furnace with guide plates Download PDFInfo
- Publication number
- CN202152332U CN202152332U CN2011202729338U CN201120272933U CN202152332U CN 202152332 U CN202152332 U CN 202152332U CN 2011202729338 U CN2011202729338 U CN 2011202729338U CN 201120272933 U CN201120272933 U CN 201120272933U CN 202152332 U CN202152332 U CN 202152332U
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- furnace
- burner
- flow deflector
- tube
- radiation
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Abstract
A heating furnace with guide plates is applied to delayed coking for heavy oil heating in petroleum processing. A convection chamber is arranged at the lower part of a chimney and is positioned at the upper part of a furnace body. The furnace body is provided with 1 to 4 hearths, and a furnace wall is arranged in the middle of each hearth and divides each hearth into two symmetrical radiation chambers. Radiation furnace tubes are arranged in each radiation chamber, and combustors are arranged at the bottoms of the radiation chambers. The guide plates are welded between the outer furnace walls and the top of the furnace body, and the included angle between each guide plate and the outer furnace wall of the furnace body ranges from 110 to 140 degrees. The heating furnace has the effects as follows: the guide plates are arranged additionally at the shoulders of the hearths of the radiation chambers, so as to improve the flow evenness of flue gas in the hearths and perfect the distribution of thermal intensity on the surfaces of the furnace tubes at the upper parts of the radiation chambers.
Description
Technical field
The utility model relates to a kind of process furnace, particularly is used to heat the delay coking heating furnace of BO in the refining of petroleum.
Background technology
Delayed coking is a kind of oil secondary processing technology, is meant that the BO 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 (raw oil and turning oil), green coke not in reaction boiler tube carries out pyrogenic reaction again and get into coke drum, so delayed action is arranged, is called the delayed coking technology.Decarburization is thorough, plant investment is low owing to having for delay coking process, and the characteristics wide to adaptability to raw material are the main paties of heavy oil lighting always.Cover surplus the existing delayed coking unit 100 of China, annual working ability is more than 100,000,000 tons.
At present, coking furnace is the core cell equipment of delayed coking unit, provides the heavy oil lighting needed all energy, has determined unit scale, operational cycle and economic benefit.The coking furnace design is the control tube coking with the key of operation; Research shows; Coking furnace tube coking speed equals the poor of coking precursor generating rate and exfoliation rates, has only the generating rate that reduces the coking precursor, and the exfoliation rates that improves the coking precursor could reduce tube coking.The factor that influences tube coking speed can be divided into two types: one type for influencing factor such as feedstock property, the oil film temperature (Film Temperature) etc. of coking precursor generating rate; Another kind of factor such as boundary layer thickness, the interior flow body coking precursor concentration of pipe etc. for influencing coking precursor exfoliation rates.
Reducing tube coking is conflicting with reducing the coke yield target: lower boiler tube surface heat intensity; Can reduce the peak temperature (Peak Temperature) of medium and oil film; Favourable to reducing tube coking, give heat but reduced green coke reaction coking furnace simultaneously, and then cause the interior green coke reaction of coke drum not exclusively; Low volatile increases in the coke, has a strong impact on liquid product yield.
As everyone knows, the distribution of boiler tube surface heat intensity is uneven in radiation chamber, and the various novel furnaces that occur nearly decades all are to receive heat distribution, improve in the process of allowing hot strength in the boiler tube surface and grow up improving radiation chamber basically.For example through adopting two-sided radiation to make boiler tube increased by thermal uniformity, make boiler tube receive that thermal uniformity improves etc. along the pipe range direction through the even layout that adopts boiler tube horizontal positioned and nozzles.Research shows that there is flow dead in flue gas at radiation chamber top especially shoulder, and the existence of this flow dead can influence the surface heat intensity of radiation chamber top boiler tube.
The utility model content
The purpose of the utility model is: a kind of process furnace that is provided with flow deflector is provided, sets up flow deflector at the burner hearth shoulder, thereby improve the homogeneity of flow of flue gas in the burner hearth, improve the distribution of radiation chamber top boiler tube surface heat intensity.
The technical scheme that the utility model adopts is: a kind of process furnace that is provided with flow deflector, mainly form by chimney, convection chamber, radiation chamber, boiler tube, flow deflector, furnace wall and burner.Convection chamber is arranged at the bottom of chimney, and convection chamber is on the top of body of heater; Vertically be arranged with fin or nail head type convective heating boiler tube in the convection chamber, the convective heating boiler tube adopts stationary tubesheet to support, and shield tube is arranged at the convection chamber bottom; It is characterized in that: described body of heater has 1～4 burner hearth; In the middle of each burner hearth, build a furnace wall is arranged; Furnace wall is divided into two symmetric radiation chambers with burner hearth; In each radiation chamber, radiating furnace tube is arranged, radiating furnace tube is two-sided radiating furnace tube, radiating furnace tube horizontally in radiation chamber and radiating furnace tube in the middle of hearth wall and furnace wall; Burner is arranged in radiation chamber, and burner is positioned at the bottom of radiation chamber; Between the outer furnace wall of body of heater and furnace roof, be welded with flow deflector.Angle between the outer furnace wall of flow deflector and body of heater is between 110～140 °.
Burner evenly is provided with along furnace wall and middle walls.The burner port of burner tilts to furnace wall or middle walls direction.
The width of flow deflector is between 0.3～0.5 times of radiation chamber width.What flow deflector adopted is steel plate, and the thickness of steel plate is between 5～10mm.
This process furnace both can be used for old furnace modification, also can be used for new stove design.
The beneficial effect of the utility model: the utility model is provided with the process furnace of flow deflector, sets up flow deflector at radiation chamber burner hearth shoulder, improves the homogeneity of flow of flue gas in the burner hearth, improves the distribution of radiation chamber top boiler tube surface heat intensity.
Description of drawings
Fig. 1 is the process furnace diagrammatic cross-section that the utility model structure is provided with flow deflector.
Among the figure, 1-chimney, 2-convection chamber, 3-flow deflector, 4-radiation chamber, 5-radiation chamber boiler tube, 6-burner, 7-middle walls.
Embodiment
Embodiment 1: with a process furnace that is provided with flow deflector is example, and the utility model is done further explain.
Consult Fig. 1.The utility model is provided with the process furnace of flow deflector, mainly is made up of chimney 1, convection chamber 2, radiation chamber 4, boiler tube 5, flow deflector 3, furnace wall 7 and burner 6.Convection chamber 2 is arranged at the bottom of chimney 1, and convection chamber 2 is on the top of body of heater.Vertically be arranged with fin or nail head type convective heating boiler tube in the convection chamber 2, the convective heating boiler tube adopts stationary tubesheet to support, and shield tube is arranged at convection chamber 2 bottoms.
Body of heater has two burner hearths; In the middle of each burner hearth, build a furnace wall 7 is arranged; Furnace wall 7 is divided into two symmetric radiation chambers 4 with burner hearth; In each radiation chamber 4, radiating furnace tube 5 is arranged, radiating furnace tube 5 is two-sided radiating furnace tube, radiating furnace tube 5 horizontally in radiation chamber 4 and radiating furnace tube 5 in the middle of hearth wall and furnace wall 7.Two row's burners 6 are arranged in radiation chamber 4.Burner 6 is positioned at the bottom of radiation chamber 4; One row's burner 6 evenly is provided with along the furnace wall, and the burner port of burner 6 tilts to the furnace wall direction.Another row's burner 6 evenly is provided with along middle walls 7, and the burner port of burner 6 tilts to middle walls 7 directions.
Between the outer furnace wall of body of heater and furnace roof, be welded with a flow deflector 3.β angle between the outer furnace wall of flow deflector 3 and body of heater is 130 °.The width of flow deflector 3 is 0.4 times of radiation chamber 4 width.What flow deflector 3 adopted is steel plate, and the thickness of steel plate is 10mm.Flow deflector 3 be coated with protective system, flow deflector 3 medial surfaces have thermal insulation layer, what the thermal insulation layer of flow deflector 3 medial surfaces adopted is the ceramic fiber composite module.
Through setting up flow deflector at radiation chamber burner hearth shoulder, improved the utilization ratio of burner hearth and the heat transfer efficiency of radiating furnace tube, significantly increased the furnace volume hot strength, effectively increase the treatment capacity of unit furnace volume.
Claims (3)
1. a process furnace that is provided with flow deflector mainly is made up of chimney (1), convection chamber (2), radiation chamber (4), boiler tube (5), flow deflector (3), furnace wall (7) and burner (6); Convection chamber (2) is arranged at the bottom of chimney (1), and convection chamber (2) is on the top of body of heater; Vertically be arranged with fin or nail head type convective heating boiler tube in the convection chamber (2), the convective heating boiler tube adopts stationary tubesheet to support, and shield tube is arranged at convection chamber (2) bottom; It is characterized in that: described body of heater has 1～4 burner hearth; In the middle of each burner hearth, build a furnace wall (7) is arranged; Furnace wall (7) is divided into two symmetric radiation chambers (4) with burner hearth; Radiating furnace tube (5) is arranged in each radiation chamber (4), and radiating furnace tube (5) is two-sided radiating furnace tube, radiating furnace tube (5) horizontally in radiation chamber (4) and radiating furnace tube (5) in the middle of hearth wall and furnace wall (7); Burner (6) is arranged in radiation chamber (4), and burner (6) is positioned at the bottom of radiation chamber (4); Between the outer furnace wall of body of heater and furnace roof, be welded with flow deflector (3); Angle between the outer furnace wall of flow deflector (3) and body of heater is between 110～140 °.
2. the process furnace that is provided with flow deflector according to claim 1 is characterized in that: burner (6) evenly is provided with along furnace wall and middle walls (7); The burner port of burner (6) tilts to furnace wall or middle walls (7) direction.
3. the process furnace that is provided with flow deflector according to claim 1 and 2 is characterized in that: the width of flow deflector (3) is between 0.3～0.5 times of radiation chamber (4) width; What flow deflector (3) adopted is steel plate, and the thickness of steel plate is between 5～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202729338U CN202152332U (en) | 2011-07-29 | 2011-07-29 | Heating furnace with guide plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202729338U CN202152332U (en) | 2011-07-29 | 2011-07-29 | Heating furnace with guide plates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202152332U true CN202152332U (en) | 2012-02-29 |
Family
ID=45692835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202729338U Expired - Lifetime CN202152332U (en) | 2011-07-29 | 2011-07-29 | Heating furnace with guide plates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202152332U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146414A (en) * | 2013-02-22 | 2013-06-12 | 中国寰球工程公司 | Coking furnace for slowing down coking trend |
| EP3750974A1 (en) * | 2019-06-12 | 2020-12-16 | INDIAN OIL CORPORATION Ltd. | A delayed coking furnace for heating coker feedstock |
| CN114705044A (en) * | 2022-03-24 | 2022-07-05 | 中国神华煤制油化工有限公司 | Heating furnace |
-
2011
- 2011-07-29 CN CN2011202729338U patent/CN202152332U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146414A (en) * | 2013-02-22 | 2013-06-12 | 中国寰球工程公司 | Coking furnace for slowing down coking trend |
| 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 |
| CN114705044A (en) * | 2022-03-24 | 2022-07-05 | 中国神华煤制油化工有限公司 | Heating furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120229 |
|
| CX01 | Expiry of patent term |