CN106635123A - Multi-pass furnace tubes cracking furnace by oxygen-rich combustion - Google Patents
Multi-pass furnace tubes cracking furnace by oxygen-rich combustion Download PDFInfo
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- CN106635123A CN106635123A CN201510725504.4A CN201510725504A CN106635123A CN 106635123 A CN106635123 A CN 106635123A CN 201510725504 A CN201510725504 A CN 201510725504A CN 106635123 A CN106635123 A CN 106635123A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
- C10G9/18—Apparatus
- C10G9/20—Tube furnaces
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C11/00—Aliphatic unsaturated hydrocarbons
- C07C11/02—Alkenes
- C07C11/04—Ethylene
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C11/00—Aliphatic unsaturated hydrocarbons
- C07C11/02—Alkenes
- C07C11/06—Propene
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C11/00—Aliphatic unsaturated hydrocarbons
- C07C11/02—Alkenes
- C07C11/08—Alkenes with four carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
- C07C4/02—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by cracking a single hydrocarbon or a mixture of individually defined hydrocarbons or a normally gaseous hydrocarbon fraction
- C07C4/04—Thermal processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1037—Hydrocarbon fractions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
- C10G2400/20—C2-C4 olefins
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Air Supply (AREA)
Abstract
The invention provides a multi-pass furnace tube cracking furnace by oxygen-rich combustion. The multi-pass furnace tube cracking furnace comprises a radiation chamber furnace lining used for limiting a radiation chamber, a furnace pipe assembly arranged in the radiation chamber, several combustors for providing heat radiation in the radiation chamber; wherein the combustor employs oxygen-enriched air for combustion-supporting, and the furnace pipe assembly employs multi-pass furnace tubes. According to the invention, furnace tube design and oxygen-rich combustion are considered, a vertical inlet tube is closer to the combustor than a vertical outlet pipe, heat is preferentially transformed to the vertical inlet tube which urgently requires heat, at the same time, the vertical inlet tube and the vertical outlet pipe which enable abreast arrangement, due to combustion-supporting by oxygen-enriched air, the vertical outlet pipe which is far from the combustor can obtain enough heat for a continuous reaction, the heat efficiency of the cracking furnace is increased, smoke evacuation loss is reduced, and the energy saving of the cracking furnace is promoted.
Description
Technical field
The present invention relates to a kind of a kind of pyrolysis furnace of many journey boiler tubes of pyrolysis furnace, especially employing oxygen-enriched combusting.
Background technology
The low-carbon alkenes such as ethene, propylene and butadiene are the important foundation raw materials of petro chemical industry.At present, it is raw
The method of product low-carbon alkene is based on tube furnace cracking petroleum hydrocarbon vapor technique.According to statistics, in the world about 99%
Ethene, more than 50% propylene and more than 90% butadiene pass through the technique productions.
The nucleus equipment of tube furnace cracking petroleum hydrocarbon vapor technique is tube cracking furnace (hereinafter referred to as " cracking
Stove "), cracking stock such as ethane, propane, naphtha and hydrogenation tail oil is heated to high temperature in pyrolysis furnace
When, it may occur that carbochain fracture chemical reaction, generate low-carbon alkene such as ethene, propylene and butadiene etc..But,
Heat scission reaction process is sufficiently complex, in addition to purpose product low-carbon alkene, while it also occur that dehydrogenation, isomery
The side reactions such as change, cyclisation, overlapping and condensation, generate other accessory substances.Therefore, how reaction condition is controlled,
Make the problem that purpose product low-carbon alkene in product is preferably at most that the field is studied always.
The result that studies for a long period of time both domestic and external shows, raw material hydro carbons high temperature, short residence time, low hydrocarbon partial pressure bar
Under part to generate alkene be favourable.Reaction initial stage, from from the aspect of pressure drop, due to react conversion ratio compared with
Low, the increase of tube fluid volume is few, and the linear velocity of tube fluid also increases seldom, and less caliber will not draw
Playing pressure drop increases too many, and will not have a strong impact on average hydrocarbon partial pressure increases；From from the aspect of calorific intensity, due to raw material urgency
Play heats up, and absorbs amount of heat, it requires that calorific intensity is big, and less caliber increases can specific surface area, from
And meet and require；From in terms of coking trend, because conversion ratio is relatively low, secondary response still can not occur, coking rate
Relatively low, less caliber is also allowed.In the later stage of reaction, from from the aspect of pressure drop, due to now converting
Rate is higher, and the increase of tube fluid volume is more, meanwhile, the linear velocity of fluid also steeply rises, compared with Large Diameter Pipeline ratio
Relatively it is adapted to；From from the aspect of calorific intensity, because conversion ratio is higher, calorific intensity starts to reduce, larger caliber
It is not significantly affected by heat-transfer effect；From from the aspect of coking trend, because conversion ratio is higher, secondary response is more,
Coking rate increases, and larger boiler tube caliber ensure that boiler tube is unobstructed and be unlikely to cause too big pressure drop.It is comprehensive
It is upper described, it is however generally that, we can be when cracking furnace pipe be designed in the entrance (initial reaction stage) of cracking furnace pipe
Using less caliber, in the outlet of cracking furnace pipe larger caliber is adopted.
In order to realize the target of " high temperature, short residence time and low hydrocarbon partial pressure ", the new boiler tube of nearly all configuration
The method for shortening pipe range is employed, pipe range is shortened to a two journeys 25m left side by such as lummus companies by eight journeys 73m
It is right；Pipe range is changed to two journeys 21m by Shi Wei companies by quadruple pass 45m；KTI companies are shortened pipe range by quadruple pass 46m
To two journeys 23m, the time of staying also by more than 0.5s is reduced to 0.15～0.25s therewith.
In the world develop ethene tube cracking furnace technology patent business have ABB Lummus Global, Technip,
Stone＆Webster, Linde, KBR and Sinopec company etc., and already take up cracking of ethylene technology
Leading position.At present, the research and development of ethane cracking furnace new technique are extremely focused in these technical patent commercial cities,
The design studies of radiant coil are exactly one of important research direction, and the design of radiant coils is to determine cracking choosing
Selecting property and the committed step for improving cracking product yield, change structure and the arrangement of radiant coil, such as non-limbed
The radiating furnace tube of the different structure such as reducing, branch's reducing, one way be isometrical has become the important directions of boiler tube optimization.
From from the point of view of cracking furnace tube, at the initial stage of reaction, due to raw material steep temperature rise, amount of heat is absorbed,
It requires that calorific intensity is big, more less caliber increases can specific surface area, so as to meet requirement；In reaction
Later stage, because conversion ratio is higher, calorific intensity starts to reduce, and less larger caliber is not significantly affected by
Heat-transfer effect.In sum, it is however generally that, the entrance when cracking furnace pipe is designed in cracking furnace pipe (reacts
Initial stage) more less caliber is adopted, adopt less larger (i.e. last stage reaction) in the outlet of cracking furnace pipe
Caliber.
From in terms of the heat transfer angle of pyrolysis furnace, in the burner hearth of pyrolysis furnace, fuel gas (mainly methane and hydrogen) combustion
Burn and heat is provided, these heats enter boiler tube by radiant heat transfer and convection heat transfer' heat-transfer by convection.Generally pyrolysis furnace is all using combustion
Heat of the mixed combustion of material gas and air needed for provide cracking reaction.In general, combustion reaction is fuel
In flammable molecule and oxygen molecule between occur energetic encounter and cause, so the state of supply of oxygen determines combustion
Burning process.
Traditional pyrolysis furnace typically uses air as combustion-supporting gas, because content of oxygen in air only has 21%,
Major part is nitrogen, therefore in combustion, the burning velocity of fuel gas is slower, and combustion flame is longer,
The short transverse of cracking burner hearth, the curved distribution of fire box temperature is few in burner hearth bottom heating load, and burner hearth middle part is then
At most, upper furnace heating load starts to reduce heating load.For the pyrolysis furnace of many journey boiler tubes, when being stopped due to it
Between it is longer, burner hearth heat supply and boiler tube heat absorption between contradiction still do not project, for one way boiler tube, this contradiction is just
Highlight, in the arrival end of boiler tube, material continues to be rapidly heated, continue substantial amounts of heat, but tradition is fired
The bottom heating load of burning system is less；And at coil outlet end, the coking rate of material is sharply increased, control is needed
The generation of secondary response processed, but the middle and upper part heating load of conventional combustion systems starts to reach maximum.That is,
There is a problem of a matching between combustion system and one way boiler tube.
If burnt using the oxygen-enriched air higher than air oxygen concentration, for air burning, tool
There are more advantages：One be because radiation heat transfer is the major way of pyrolysis furnace heat transfer, the characteristics of according to gas radiation,
Only three atomic gas and polyatomic gas have radianting capacity, and diatomic gas does not almost have radianting capacity, often
In the case of rule air-breathing, the nitrogen proportion of radiationless ability is very high, and the blackness of flue gas is very low, affects
The radiant heat transfer process that flue gas is arranged boiler tube pipe.Using oxygenized air combustion supporting, because nitrogen content it is few, air capacity
Substantially reduce with exhaust gas volumn, therefore flame temperature and blackness are notable with the increase of oxygen proportion in combustion air
Improve, and then improve Fire Radiation intensity and reinforcing radiant heat transfer；Two is to adopt oxygenized air combustion supporting, burning
Flame shortens, and combustion intensity is improved, increased flame speeds, so will be helpful to combustion reaction completely, improves combustion
The service efficiency of material, and then improve the thermal efficiency of pyrolysis furnace；Three is to adopt oxygenized air combustion supporting, can suitably be dropped
Low excess air coefficient, reduces smoke evacuation volume, reduces the exhaust gas volumn after burning, and then reduces flue gas loss, promotees
Enter the energy-conservation of pyrolysis furnace.
The present invention is exactly to design from the aspect of two from hearth combustion and boiler tube, invents a kind of splitting for very high selectivity
Solution stove, characteristic and the boiler tube design characteristics of its hearth combustion match, and then have given play to respective sharpest edges,
Obtain one and there is the appropriate cycle of operation, the cracker that selective the high, thermal efficiency is high, energy consumption is low.
The content of the invention
In order to solve the above problems, it is an object of the invention to provide a kind of burning velocity that can improve combustion gas,
The thermal efficiency of pyrolysis furnace is improved, flue gas loss is reduced and is made many journeys of the employing oxygen-enriched combusting of pyrolysis furnace more energy-conservation
The pyrolysis furnace of boiler tube.
It is that, up to above-mentioned purpose, the present invention provides a kind of pyrolysis furnace of many journey boiler tubes of employing oxygen-enriched combusting, including：
For limiting the radial chamber furnace lining of radial chamber；
The boiler tube component being arranged in the radial chamber；And
For providing thermal-radiating multiple burners into radial chamber；
Wherein：The burner adopts oxygenized air combustion supporting, and the boiler tube component adopts many journey boiler tubes.
The pyrolysis furnace of many journey boiler tubes of described employing oxygen-enriched combusting, wherein, many journey boiler tubes are two journey boiler tubes,
And the two journeys boiler tube, including the vertical inlet tube and vertical exit pipe being connected, the vertical inlet tube is than described
Vertical exit pipe is closer to the burner.
The pyrolysis furnace of many journey boiler tubes of described employing oxygen-enriched combusting, wherein, the burner is located at radial chamber
On bottom and/or side wall.
The pyrolysis furnace of many journey boiler tubes of described employing oxygen-enriched combusting, wherein, the volume of the oxygen-enriched air concentration
Percentage is 25～40%.
The pyrolysis furnace of many journey boiler tubes of described employing oxygen-enriched combusting, wherein, the volume of the oxygen-enriched air concentration
Percentage is 27～33%.
The pyrolysis furnace of many journey boiler tubes of described employing oxygen-enriched combusting, wherein, the vertical inlet tube with vertically go out
Mouth pipe is arranged in parallel.
The pyrolysis furnace of many journey boiler tubes of described employing oxygen-enriched combusting, wherein, it is described perpendicular also including quenching boiler
To outlet is located at the middle position of radial chamber and connects the quenching boiler.
The pyrolysis furnace of many journey boiler tubes of described employing oxygen-enriched combusting, wherein, it is located at the combustion of the radial chamber bottom
The quantity of burner is 2～8.
The pyrolysis furnace of many journey boiler tubes of described employing oxygen-enriched combusting, wherein, the burner symmetric arrays.
The pyrolysis furnace of many journey boiler tubes of described employing oxygen-enriched combusting, wherein, the oxygen-enriched air is inhaled using transformation
Attached or film osmosis is obtained.
The invention has the beneficial effects as follows：From the aspect of the present invention is from boiler tube design and using oxygen-enriched combusting two, make
Vertical inlet tube (a journey boiler tube) than vertical exit pipe (two journey boiler tubes) closer to burner, can not only
Ensure heat can preferentially pass to be badly in need of heat vertical inlet tube, meanwhile, the vertical inlet tube being arranged side by side and
Vertical exit pipe can also effectively save space, additionally due to oxygenized air combustion supporting, can improve Fire Radiation intensity
With reinforcing radiant heat transfer, make the vertical exit pipe for being relatively distant from burner also to obtain enough heats and continue anti-
Should, therefore the present invention can improve the thermal efficiency of pyrolysis furnace, reduce flue gas loss, promote the energy-conservation of pyrolysis furnace.
Description of the drawings
Hereinafter the present invention will be described in more detail based on embodiment and refer to the attached drawing.Wherein：
Fig. 1 is the structural representation of the pyrolysis furnace of many journey boiler tubes of the employing oxygen-enriched combusting according to the present invention.
In the accompanying drawings identical part uses identical reference.Accompanying drawing is not drawn according to actual ratio.
Specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the structural representation of the pyrolysis furnace 10 of many journey boiler tubes of the employing oxygen-enriched combusting according to the present invention.
The pyrolysis furnace 10 is mainly used in all kinds of cracking stocks such as heated natural gas, refinery gas, crude oil and naphtha, promotees
Make cracking stock that carbochain fracture chemical reaction to occur, generate the low-carbon (LC) alkene such as hydrocarbon ethene, propylene and/or butadiene and
Various accessory substances.
As shown in figure 1, the pyrolysis furnace 10 includes：Radial chamber 2 is connected with radial chamber 2 and staggered is high
In radial chamber 2 convection cavity 3 and be arranged in radial chamber 2 boiler tube component 4, positioned at the top of radial chamber 2
Top and the quenching boiler 6 (belonging to the conventional products of this area) that connects with boiler tube component 4 and can be spoke
Penetrate the burner 8 that chamber 2 provides heat.
The radial chamber 2 is limited by radial chamber furnace lining 21 and shaped.It is easily understood that convection cavity 3 also may be used
Limited by convection cavity furnace lining 31 and shaped, radial chamber furnace lining 21 is connected with convection cavity furnace lining 31.
In a preferred embodiment, boiler tube component 4 is 2～4 journey boiler tubes, preferably 2 journey boiler tubes, its bag
Include at least one vertical inlet tube (a journey boiler tube) 41 and be arranged in parallel with the vertical inlet tube 41 and with
A piece vertical exit pipe (two journey boiler tubes) 42 of the bottom connection of the vertical inlet tube 41, wherein described
Vertical inlet tube (a journey boiler tube) 41 than vertical exit pipe (two journey boiler tubes) 42 closer to burner 8, and
The vertical exit pipe (two journey boiler tubes) 42 can be located at the middle position of radial chamber 2 and connect the quenching boiler
6。
Described boiler tube component 4 can be 1-1 type radiating furnace tubes, i.e., vertical inlet tube (a journey boiler tube) 41
Quantity is one；Or 2-1 type radiating furnace tubes, i.e., the quantity of vertical inlet tube (a journey boiler tube) 41 is two
Root and it is arranged symmetrically；Or 4-1 type radiating furnace tubes, i.e., the quantity of vertical inlet tube (a journey boiler tube) 41 is
Four and it is evenly arranged, etc..
In a preferred embodiment, it is provided with for spoke on the bottom of radial chamber furnace lining 21 and/or side wall
Penetrate in chamber 2 and thermal-radiating multiple burners 8 are provided.Thus, it is possible to improve the heat in radial chamber 2.It is preferred that
, it is located at burner 8 on the bottom of radial chamber 2 and is located between vertical inlet tube 41 and radial chamber furnace lining 21,
So, heat can preferentially pass to the vertical inlet tube (a journey boiler tube) 41 for being badly in need of heat, simultaneously as rich
Oxygen air-breathing, can improve Fire Radiation intensity and reinforcing radiant heat transfer, make to be relatively distant from the vertical of burner
Outlet (two journey boiler tubes) 42 can also obtain enough heats to be continued to react.
The ratio of the internal diameter of the vertical exit pipe 42 of described boiler tube component 4 and the internal diameter of the vertical inlet tube 41
Scope be：1～2.1.
The scope of the internal diameter of vertical inlet tube 41 of described boiler tube component 4 is：25mm to 60mm.It is preferred that
The scope of entrance bore is：35mm to 55mm.
The scope of the internal diameter of vertical exit pipe 42 of described boiler tube component 4 is：45mm to 120mm.It is preferred that
The scope of port of export spout diameter is：60mm to 95mm.
In described combustion system, the heat supply ratio of combustion bottom burner 8 is 60～90%, preferably
70～85%.
In described combustion system, the quantity of the corresponding combustion bottom burner 8 of every group of radiant coil is 2～8,
Combustion bottom burner 8 is located at the both sides of boiler tube component 4, in symmetric arrays.
The burner 8 using the mixing of combustion gas and oxygen-enriched air to provide cracking reaction needed for heat.Institute
State oxygen-enriched air to obtain using pressure-variable adsorption or film osmosis, the oxygen-enriched air concentration is 25～40% (bodies
Product percentage, v%), preferably 27-33% (percent by volume, v%).
Burnt using the oxygen-enriched air higher than air oxygen concentration, for air burning, with compared with
Many advantages：One is because radiation heat transfer is the major way of pyrolysis furnace heat transfer, the characteristics of according to gas radiation, only
There are three atomic gas and polyatomic gas that there is radianting capacity, diatomic gas is conventional almost without radianting capacity
In the case of air-breathing, the nitrogen proportion of radiationless ability is very high, and the blackness of flue gas is very low, have impact on
The radiant heat transfer process that flue gas is arranged boiler tube pipe.Using oxygenized air combustion supporting, because nitrogen content it is few, air capacity and
Exhaust gas volumn is substantially reduced, therefore flame temperature and blackness are significantly carried with the increase of oxygen proportion in combustion air
Height, and then improve Fire Radiation intensity and reinforcing radiant heat transfer；Two is to adopt oxygenized air combustion supporting, burning fire
Flame shortens, and combustion intensity is improved, increased flame speeds, so will be helpful to combustion reaction completely, improves fuel
Service efficiency, and then improve pyrolysis furnace the thermal efficiency；Three is to adopt oxygenized air combustion supporting, can suitably be reduced
Excess air coefficient, reduces smoke evacuation volume, reduces the exhaust gas volumn after burning, and then reduces flue gas loss, promotes
The energy-conservation of pyrolysis furnace.
The present invention operation principle be：In cracking process, cracking stock first passes around convection cavity 3 and is vaporized
And the pre-heat treatment, then in radial chamber 2 then entering in boiler tube component 4 carries out cracking reaction, when splitting
When the fluid of solution raw material enters into each vertical inlet tube 41, because vertical inlet tube 41 is closer to burner
8, therefore heat can preferably pass to the vertical inlet tube 41 for being badly in need of heat, can rapidly lift each vertical import
Temperature in pipe 41, improves the speed of cracking reaction in vertical inlet tube 41.When the fluid of cracking stock is entered
During to vertical exit pipe 42, due to oxygenized air combustion supporting, Fire Radiation intensity can be improved and reinforcing radiation is passed
Heat, makes the vertical exit pipe 42 for being relatively distant from burner also to obtain enough heats and continues to react, and vertically goes out
Mouth pipe 42 can reduce reacting hydrocarbon cracking the coking sensitiveness in later stage.Quenching boiler 6 is entered into after cracking
Inside carry out cooling treatment.
In sum, the present invention from boiler tube design and using oxygen-enriched combusting two from the aspect of, make vertical inlet tube
(a journey boiler tube) 41, closer to burner 8, can not only ensure than vertical exit pipe (two journey boiler tubes) 42
Heat can preferentially pass to the vertical inlet tube (a journey boiler tube) 41 for being badly in need of heat, meanwhile, what is be arranged side by side is perpendicular
To inlet tube (a journey boiler tube) 41 and vertical exit pipe (two journey boiler tubes) 42 can also effectively save space, this
It is outer that Fire Radiation intensity and reinforcing radiant heat transfer can be improved due to oxygenized air combustion supporting, make to be relatively distant from burning
The vertical exit pipe (two journey boiler tubes) 42 of device can also obtain enough heats to be continued to react, therefore the present invention can
The thermal efficiency of pyrolysis furnace is improved, flue gas loss is reduced, promotes the energy-conservation of pyrolysis furnace.
Although by reference to preferred embodiment, invention has been described, without departing from the scope of the present invention
In the case of, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, only
Otherwise there is structural hazard, the every technical characteristic being previously mentioned in each embodiment can have been combined in any way
Come.The invention is not limited in specific embodiment disclosed herein, but including falling within the scope of the appended claims
All technical schemes.
Claims (10)
1. the pyrolysis furnace of many journey boiler tubes of a kind of employing oxygen-enriched combusting, including：
For limiting the radial chamber furnace lining of radial chamber；
The boiler tube component being arranged in the radial chamber；And
For providing thermal-radiating multiple burners into radial chamber；
It is characterized in that：The burner adopts oxygenized air combustion supporting, and the boiler tube component adopts many journey stoves
Pipe.
2. the pyrolysis furnace of many journey boiler tubes of employing oxygen-enriched combusting according to claim 1, it is characterised in that
Many journey boiler tubes are two journey boiler tubes, and the two journeys boiler tube is including the vertical inlet tube and vertical exit being connected
Pipe, the vertical inlet tube is than the vertical exit pipe closer to the burner.
3. the pyrolysis furnace of many journey boiler tubes of employing oxygen-enriched combusting according to claim 1 and 2, its feature exists
In the burner is located on the bottom of radial chamber and/or side wall.
4. the pyrolysis furnace of many journey boiler tubes of employing oxygen-enriched combusting according to claim 1 and 2, its feature exists
In the percent by volume of the oxygen-enriched air concentration is 25～40%.
5. the pyrolysis furnace of many journey boiler tubes of employing oxygen-enriched combusting according to claim 1 and 2, its feature exists
In the percent by volume of the oxygen-enriched air concentration is 27～33%.
6. the pyrolysis furnace of many journey boiler tubes of employing oxygen-enriched combusting according to claim 1 and 2, its feature exists
In the vertical inlet tube is arranged in parallel with vertical exit pipe.
7. the pyrolysis furnace of many journey boiler tubes of employing oxygen-enriched combusting according to claim 1 and 2, its feature exists
In also including quenching boiler, the vertical exit pipe is located at the middle position of radial chamber and connects the chilling pot
Stove.
8. the pyrolysis furnace of many journey boiler tubes of employing oxygen-enriched combusting according to claim 3, it is characterised in that
The quantity for being located at the burner of the radial chamber bottom is 2～8.
9. the pyrolysis furnace of many journey boiler tubes of employing oxygen-enriched combusting according to claim 8, it is characterised in that
The burner symmetric arrays.
10. the pyrolysis furnace of many journey boiler tubes of employing oxygen-enriched combusting according to claim 1 and 2, its feature
It is that the oxygen-enriched air is obtained using pressure-variable adsorption or film osmosis.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477570A (en) * | 2017-07-21 | 2017-12-15 | 中航世新燃气轮机股份有限公司沈阳分公司 | The ultralow discharged nitrous oxides process of ethane cracking furnace combustion system |
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| CN102051197A (en) * | 2009-10-27 | 2011-05-11 | 中国石油化工股份有限公司 | Multi-tube pass ethylene pyrolysis furnace |
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| CN106635123B (en) | 2018-11-30 |
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