CN201136856Y - Asphalr heating kettle of deasphalting device of small handling capacity by butane - Google Patents
Asphalr heating kettle of deasphalting device of small handling capacity by butane Download PDFInfo
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- CN201136856Y CN201136856Y CNU2007201905622U CN200720190562U CN201136856Y CN 201136856 Y CN201136856 Y CN 201136856Y CN U2007201905622 U CNU2007201905622 U CN U2007201905622U CN 200720190562 U CN200720190562 U CN 200720190562U CN 201136856 Y CN201136856 Y CN 201136856Y
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Abstract
The utility model relates to an asphalt heating furnace of a small processing load butane deasphalting device. A convection chamber is arranged at the narrow part at the upper part in the furnace, a radiation chamber is arranged at the wider part at the lower part in the furnace, a furnace tube is divided into radiation furnace tubes, convection furnace tubes, an outside-furnace oil transfer tube and an inside-furnace oil transfer tube, the radiation furnace tubes are parallel to the bottom of a furnace body and are arranged at both sides of the furnace body of the radiation chamber, the convection furnace tubes are parallel to the bottom of the furnace body and are arranged in the middle of the furnace body of the convection chamber, an oil inlet pipe and an oil outlet opening are both arranged in the middle of the radiation chamber, the radiation furnace tubes at the top of the side of the oil inlet pipe are communicated with the convection furnace tubes at the top end of the convection chamber through the outside-furnace oil transfer tube at the outer side of the furnace body, the convection furnace tubes are communicated with the bottom end radiation furnace tubes at the other side of the radiation chamber through the inside-furnace oil transfer tube at the outer side of the furnace body, the top radiation furnace tubes at the side are communicated with the bottom end radiation furnace tubes at the side of the oil outlet opening through the inside-furnace oil transfer tube, a burner is arranged at the bottom of the furnace body, the design is reasonable, and because the oil in the radiation chamber flows from bottom to top gradually, the asphalt furnace is uneasy to be coked.
Description
Technical field
The utility model relates to a kind of little treatment capacity (～20 * 10 of petrochemical enterprise that is used for
4T/a) butane solvent deasphalting unit asphalt heating kettle.
Background technology
The solvent deasphalting device for asphalt is a device of heavy oil deep processing.This device is in order to produce lubricating oil, subsequently owing to the needs of producing, again its means as the heavy oil deep processing the earliest.Utilize it vacuum residuum medium pitch matter can be removed, and obtain the deasphalted oil of high yield, do raw material, further produce required various petroleum productss again so that catalytic cracking and hydrocracking to be provided.
In recent years, for adapting to the requirement of market to a large amount of low sulphur heavy oils and heavy oil lighting, developed with propane, butane is the diasphaltene technology of solvent, the propane deasphalting device is to be solvent with propane, vacuum residuum is raw material, under certain temperature and pressure, utilizes propane that lubricating oil component in the vacuum residuum is had bigger solubleness, to colloid, the insoluble characteristic of bituminous matter, from residual oil, obtain the component of lubricating oil.Do not purify because of the light constituent in the vacuum residuum requires, contain a certain amount of oil content in the gained pitch, its viscosity is little, and is better mobile, and operation is also than being easier to.The propane deasphalting process furnace can be used vertical cylindrical type heater for this reason.
Butane deasphalting device deasphalted oil yield is higher by 30% than propane deasphalting yield, so asphalt viscosity is very high, causes asphalt heating kettle to be difficult to design and operation.
The first cover 20 * 10 of China
4The overcritical mixed C of t/a
4Solvent deasphalting unit built up at Jilin Petrochemical company refinery in July, 1987.But because this unit capacity is little, the asphalt heating kettle thermal load is low, and the little and misoperation of caliber causes medium flowing state mutation and deterioration, often produces coking in the boiler tube.In case the asphalt furnace coking, whole boiler tube cross section blocks, and can't finish the decoking task with the coke cleaning way, has only whole replacing boiler tubes, puts stove again and just can resume production.Especially for the butane deasphalting device asphalt heating kettle of little treatment capacity, because of caliber is little, the coking possibility is bigger.Jilin Petrochemical head factory 20 * 10
4T/a solvent deasphalting process furnace once was forced to blowing out, stopping production because of the whole cokings of boiler tube.
Summary of the invention
The purpose of this utility model is the vertical asphalt heating kettle of a kind of transverse tube radiation one convection current of design, makes flame vertical with boiler tube, can make boiler tube be heated trend evenly, and the medium flowing trend steadily in the pipe.
Butane deasphalting device asphalt heating kettle described in the utility model is by body of heater, boiler tube, chimney, stove steelframe and burner constitute, body of heater is up-narrow and down-wide two the cylindrical shells that rectangular parallelepiped constitute of a centre by oblique section connection, the narrower part of body of heater internal upper part is a convection chamber, the bottom wide portions is a radiation chamber, boiler tube is divided into radiating furnace tube, convection coil, stove changes outward and changes oil pipe in oil pipe and the stove, the parallel body of heater of radiating furnace tube bottom surface is arranged in radiation chamber body of heater both sides, the parallel body of heater of convection coil bottom surface is arranged in the middle of the convection chamber body of heater, the inlet tube of oil and outlet pipe all are arranged on the radiation chamber middle part, the top radiating furnace tube of oil-in pipe side changes oil pipe outward by the stove that is arranged on the body of heater outside and is communicated with the vertical convection coil of convection chamber, the convection coil of convection chamber bottom changes oil pipe outward by the stove that is arranged on the body of heater outside and is communicated with the bottom radiating furnace tube of radiation chamber opposite side, the top radiating furnace tube of this side is communicated with the bottom radiating furnace tube of oil export pipe side by changeing oil pipe in the stove, and burner is arranged on the bottom of body of heater.
Butane is a light constituent, pitch is heavy constituent, if use the standpipe cylindrical furnace, it is different to cause up and descending boiler tube medium at vertical boiler tube to flow, and is separated the generation trapping phenomena easily in down pipe position vapour-liquid two, because of its mass velocity little, unstable flowing also occur easily in upward vertical tube, and during blowing out, residue pitch is difficult for purging, difficulty drains and influences production.Lying pipe type of furnace flame is vertical with boiler tube, can make boiler tube be heated trend evenly, and the medium flowing trend steadily in the pipe.So the butane deasphalting process furnace should be selected the lying pipe vertical heater type of furnace for use.
The oil product temperature is low before the general tube furnace heating, for preventing low temperature corrosion, earlier to the oil product preheating, reenters the convection chamber heating after waiting to reach certain temperature, can make the heat of process furnace be able to rationally utilize and prevent low-temperature dew point corrosion.
Enter radiation chamber because be two phase flow after the oil product gasification, oil product is bottom-up in the radiator tube flows, and can increase the chance that vapour-liquid two contacts.Thereby select asphalt furnace that oil product is gone into stove from the radiation chamber middle part, oil product rises to the radiation chamber top along level pipe, go into the convection chamber top firing by the outer transfer line of stove, oil product is flowed through, and temperature increases to 156 ℃ of butane gasifying points before the shield tube, make butane begin gasification, be two phase flow this moment in the pipe, after changing radiation chamber one side bottom over to and travelling up to the radiation chamber top gradually, change radiation chamber opposite side bottom again over to and upwards flow, below the radiation chamber inlet, come out of the stove at last by root.This in radiation chamber oil product progressively from bottom to top the mobile method be more rational.This flow direction makes asphalt furnace be difficult for coking.
Select the asphalt furnace maximum cold oil velocity can slow down coking in 1.0～2.0m/s scope, mass velocity be generally got 1000kg/ (m
2S), boiler tube can coking, and full furnace pressure is fallen less than 0.5MPa.
The asphalt furnace hot strength of selecting little treatment capacity is at 10000w/m
2, the asphalt heating kettle hot strength of high throughput is at 12000w/m
2Comparatively suitable.
Can select the chromemolybdenum steel boiler tube, it is corrosion-resistant higher with hot strength.There is sulfur corrosion in the asphalt furnace oil product, and radiating furnace tube adopts 9Cr-1Mo, and convection current is adopted
Material.
Because cryogenic media heats in advance, has improved the convection current temperature in, has avoided the low temperature corrosion district, and the oil product flowability is improved.
Adopt the lower mass velocity of 1000kg/ (m2s), keep the laminar flow regime flow pattern, reduce coking probability and droop loss.
Choose lower hot strength and can reduce or alleviate coking.
Select the good chromemolybdenum steel tubing of corrosion resistance for use, increase the service life and on-stream time.
Description of drawings
The little treatment capacity butane deasphalting of Fig. 1 device asphalt heating kettle structural representation.
Wherein: 1, stove changes oil pipe 2, stove steelframe 3, chimney 4, convection chamber 5, convection coil 6, stove outward changes oil pipe 7, radiating furnace tube 8, body of heater 9, radiation chamber 10, burner 11 outward, changes oil pipe 12, outlet pipe 13, inlet tube
Embodiment
With reference to the accompanying drawings to small-scale (≤20 * 10 described in the utility model
4T/a) structure of butane solvent deasphalting unit asphalt heating kettle is carried out detailed narration,
Butane deasphalting device asphalt heating kettle described in the utility model is by body of heater 8, boiler tube 5,7, chimney 3, stove steelframe 2 and burner 10 constitute, body of heater 8 is a centre two up-narrow and down-wide cylindrical shells that rectangular parallelepiped constitutes by oblique section connection, the narrower part of body of heater internal upper part is a convection chamber 4, the bottom wide portions is a radiation chamber 9, boiler tube is divided into radiating furnace tube 7, convection coil 5, stove changes oil pipe 1 outward, 6 and stove in change oil pipe 11, radiating furnace tube 7 parallel body of heater bottom surfaces are arranged in radiation chamber 9 body of heater both sides, convection coil 5 parallel body of heater bottom surfaces are arranged in the middle of convection chamber 4 bodies of heater, the inlet tube 13 and the outlet pipe 12 of oil all are arranged on radiation chamber 9 middle parts, the top radiating furnace tube 7 that 13 sides are managed in the oil-in changes oil pipe 1 outward by the stove that is arranged on the body of heater outside and is communicated with convection chamber 4 vertical convection coils 5, the convection coil 5 of convection chamber 4 bottoms changes oil pipe 6 outward by the stove that is arranged on the body of heater outside and is communicated with the bottom radiating furnace tube 7 of radiation chamber 9 opposite sides, the top radiating furnace tube 7 of this side is communicated with the bottom radiating furnace tube of oil export pipe 12 sides by changeing oil pipe 11 in the stove, burner 10 is arranged on the bottom of body of heater, chimney 3 is installed in the top of body of heater, and body of heater is installed on the stove steelframe 2.
According to above-mentioned patent principle, to the asphalt furnace of little treatment capacity, very easily coking at refinery, Huhehaote and Shanghai petrochemical plant solvent deasphalting unit through production practice, coking phenomenon does not all appear in the pitch medium in the pipe, and assurance device once goes into operation test run successfully, obtains ideal effect.
Claims (1)
1. one kind little treatment capacity butane deasphalting device asphalt heating kettle, be by body of heater, boiler tube, chimney, stove steelframe and burner constitute, it is characterized in that: body of heater is two up-narrow and down-wide cylindrical shells that rectangular parallelepiped constitutes that a centre is connected by swash plate, the narrower part of body of heater internal upper part is a convection chamber, the bottom wide portions is a radiation chamber, boiler tube is divided into radiating furnace tube, convection coil, stove changes outward and changes oil pipe in oil pipe and the stove, the parallel body of heater of radiating furnace tube bottom surface is arranged in radiation chamber body of heater both sides, the parallel body of heater of convection coil bottom surface is arranged in the middle of the convection chamber body of heater, the inlet tube of oil and outlet pipe all are arranged on the radiation chamber middle part, the top radiating furnace tube of oil-in pipe side changes oil pipe outward by the stove that is arranged on the body of heater outside and is communicated with the vertical convection coil of convection chamber, the convection coil of convection chamber bottom changes oil pipe outward by the stove that is arranged on the body of heater outside and is communicated with the bottom radiating furnace tube of radiation chamber opposite side, the top radiating furnace tube of this side is communicated with the bottom radiating furnace tube of oil export pipe side by changeing oil pipe in the stove, and burner is arranged on the bottom of body of heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201905622U CN201136856Y (en) | 2007-12-04 | 2007-12-04 | Asphalr heating kettle of deasphalting device of small handling capacity by butane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201905622U CN201136856Y (en) | 2007-12-04 | 2007-12-04 | Asphalr heating kettle of deasphalting device of small handling capacity by butane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201136856Y true CN201136856Y (en) | 2008-10-22 |
Family
ID=40037547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201905622U Expired - Lifetime CN201136856Y (en) | 2007-12-04 | 2007-12-04 | Asphalr heating kettle of deasphalting device of small handling capacity by butane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201136856Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062888A (en) * | 2012-12-28 | 2013-04-24 | 武汉保华石化新材料开发有限公司 | Heating furnace for processing aromatic hydrocarbon oils from heavy components of petroleum |
| CN104130792A (en) * | 2013-05-02 | 2014-11-05 | 山东宝舜化工科技有限公司 | Asphalt tubular furnace and technology for modifying asphalt by employing the asphalt tubular furnace |
-
2007
- 2007-12-04 CN CNU2007201905622U patent/CN201136856Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062888A (en) * | 2012-12-28 | 2013-04-24 | 武汉保华石化新材料开发有限公司 | Heating furnace for processing aromatic hydrocarbon oils from heavy components of petroleum |
| CN103062888B (en) * | 2012-12-28 | 2015-01-21 | 武汉保华石化新材料开发股份有限公司 | Heating furnace for processing aromatic hydrocarbon oils from heavy components of petroleum |
| CN104130792A (en) * | 2013-05-02 | 2014-11-05 | 山东宝舜化工科技有限公司 | Asphalt tubular furnace and technology for modifying asphalt by employing the asphalt tubular 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: 20081022 |
|
| CX01 | Expiry of patent term |