CN106590724A - Method for on-line repairing of manganese chromium spinel thin film of cracking furnace pipe - Google Patents
Method for on-line repairing of manganese chromium spinel thin film of cracking furnace pipe Download PDFInfo
- Publication number
- CN106590724A CN106590724A CN201510666254.1A CN201510666254A CN106590724A CN 106590724 A CN106590724 A CN 106590724A CN 201510666254 A CN201510666254 A CN 201510666254A CN 106590724 A CN106590724 A CN 106590724A
- Authority
- CN
- China
- Prior art keywords
- gas
- partial pressure
- oxygen partial
- low oxygen
- cracking furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to the field of on-line repairing of manganese chromium spinel thin films of cracking furnace pipes and discloses a method for on-line repairing of a manganese chromium spinel thin film of a cracking furnace pipe. The method includes the steps that after a cracking furnace stops burning, low oxygen partial pressure atmosphere gas is introduced into the cracking furnace for the heat treatment of the cracking furnace pipe for 5-100 hours, wherein the temperature of an inlet of the cracking furnace filled with the low oxygen partial pressure atmosphere gas is 580-650 DEG C, the temperature of an outlet of the cracking furnace filled with the low oxygen partial pressure atmosphere gas is 750-1100 DEG C, and the low oxygen partial pressure atmosphere gas contains oxidizing gas and reducing gas. By the method and the technical scheme, the on-line repairing of the manganese chromium spinel thin film on the inner surface of the cracking furnace can be conducted, the service life of the cracking furnace is prolonged, and the anticoking ability of the manganese chromium spinel thin film is kept.
Description
Technical field
The present invention relates to a kind of online method for repairing cracking furnace pipe manganese picotite thin film.
Background technology
Ethylene is one of most important basic material of petroleum chemical industry.The method of ethylene is produced at present to manage
Based on formula stove cracking technique, worldwide it is widely applied.But in the production process of ethylene
In unavoidable difficult problem be cracker under arms during coking and carburizing.In cracking process
In coking boiler tube internal diameter can be made to diminish, tube drop increase, shorten pyrolysis furnace cycle of operation；Work as pipe
When wall temperature reaches tolerance limit or pressure drop reaches to a certain degree, must blowing out carry out coke cleaning operation.In boiler tube
Wall coking hinders being normally carried out for cracking reaction, affects yield of ethene, reduces production efficiency, and high temperature
Easily promote boiler tube inwall carburizing down, cause furnace tube material performance to weaken.Exploitation novel anti-crack solution boiler tube knot
Burnt technology, for developing rapidly with very big realistic meaning and economic worth for current petrochemical industry.
Existing suppression method for coke mainly has following several：(1) raw material and production process are controlled, is adopted
The techniques such as hydrotreating, Aromatics Extractive Project, reduce arene content, improve hydrogen content；(2) ensureing heat-resisting
The composition of alloy is improved on the premise of steel alloy high-temperature behavior, reducing can cause catalytic coking as far as possible
The element such as Fe, Ni content；(3) boiler tube construction, augmentation of heat transfer are changed；(4) in cracking stock
Middle addition coking inhibitor, but addition coking inhibitor can bring pollution to downstream product, and to second
Alkene boiler tube has a certain degree of corrosion；(5) by plasma spraying, hot sputtering, high temperature sintering, gas phase
The methods such as deposition, atmosphere process form one layer of mechanical property in boiler tube inner surface and thermal stability is all good
Coating, reduces the directly contact of hydro carbons and boiler tube, reduces the catalysis activity of tube skin Fe, Ni, subtracts
The coefficient of friction of little tube skin, sticking for effective slagging prevention precursor, can effectively reduce coking
Produce.
Sinopec Beijing Research Institute of Chemical Industry and Chinese Petroleum Univ. close
Make, processed by special atmosphere, in cracking furnace pipe inner surface manganese picotite thin film, Ke Yiyou are generated
Effect reduces the coking of pyrolysis furnace, extends one times or so of pyrolysis furnace cycle of operation.But cracking furnace pipe ran
In Cheng Zhong, particularly burning process, manganese picotite thin film can occur a small amount of carbonization and peeling, certainly will
Reduce cracking furnace pipe and suppress coking behavior.But, above-mentioned technology is in the gas atmosphere for processing cracking furnace pipe
Because hydrogen content is too high, thermal capacitance is less than normal, the cracking furnace pipe temperature that cracker can not be controlled very well, leads
Cause directly process cracking furnace pipe on cracker, it is impossible to repair cracking furnace pipe.In addition,
For the manganese picotite film separation region for how repairing cracking furnace pipe, document report is yet there are no.
The content of the invention
It is an object of the invention to provide a kind of online method for repairing cracking furnace pipe manganese picotite thin film,
By the method for the present invention in cracker using multiple splitting with manganese picotite thin film
Solution boiler tube is processed, and can be repaired because the manganese picotite thin film that multiple coking coke-burning cycle is caused is damaged
Wound is peeled off.
To achieve these goals, the present invention provides a kind of online reparation cracking furnace pipe manganese picotite thin film
Method, wherein, the method includes：After pyrolysis furnace charring terminates, hypoxia point is passed through in pyrolysis furnace
Pressure atmosphere gas carry out heat treatment to cracking furnace pipe, wherein, in the cracking of the low oxygen partial pressure atmosphere gas
Boiler tube inlet temperature is that the cracking furnace pipe outlet temperature of 580-650 DEG C and the low oxygen partial pressure atmosphere gas is
Heat treatment 5-100 hours are carried out under conditions of 750-1100 DEG C, the low oxygen partial pressure atmosphere gas contain aerobic
The property changed gas and reducibility gas.
By above-mentioned technical proposal, can be de- in cracking furnace pipe inner surface portion manganese picotite thin film online
Domain of settling in an area regenerates manganese picotite thin film, and cover film comes off the catalysis such as region exposed Fe, Ni
Coking active component, so as to repair the manganese picotite thin film of cracking furnace pipe inner surface, extends cracking furnace pipe
Service life, keep manganese picotite thin film suppression coking ability.
Also, the cracking furnace pipe after method of the present invention online treatment can be used for various cracking stocks
Cracking, including ethane, propane, Petroleum, hydrogenation tail oil, light diesel fuel and do below 500 DEG C
The oil product such as mink cell focus.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Specific embodiment
The specific embodiment of the present invention is described in detail below.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
The method of the online reparation cracking furnace pipe manganese picotite thin film that the present invention is provided includes：In pyrolysis furnace
After burning end, low oxygen partial pressure atmosphere gas are passed through in pyrolysis furnace carries out heat treatment to cracking furnace pipe, its
In, it is 580-650 DEG C and the hypoxia in the cracking furnace pipe inlet temperature of the low oxygen partial pressure atmosphere gas
The cracking furnace pipe outlet temperature of partial pressure atmosphere gas be 750-1100 DEG C under conditions of carry out heat treatment 5-100
Hour, the low oxygen partial pressure atmosphere gas are containing oxidizing gases and reducibility gas.
In the present invention, the cracking furnace pipe inlet temperature of the low oxygen partial pressure atmosphere gas refers to " hypoxia point
Pressure atmosphere gas are passed into temperature during cracking furnace pipe "；Equally, the low oxygen partial pressure atmosphere gas split
Solution coil outlet temperature is referred to " low oxygen partial pressure atmosphere gas leave temperature during cracking furnace pipe ".
According to the present invention, from the manganese picotite thin film for preferably repairing cracking furnace pipe inner surface online, prolong
The aspect of the service life of long cracking furnace pipe to be considering, it is preferable that the low oxygen partial pressure atmosphere gas split
Solution boiler tube inlet temperature is 600-620 DEG C, more preferably 600 DEG C.
Equally, from the manganese picotite thin film for preferably repairing cracking furnace pipe inner surface online, cracking is extended
The aspect of the service life of boiler tube is considering, it is preferable that the cracking furnace pipe of the low oxygen partial pressure atmosphere gas
Outlet temperature is 800-950 DEG C.
In addition, only can fully repair the manganese chromium point crystalline substance of cracking furnace pipe inner surface as the time of heat treatment
Stone thin film, usually 1-100 hours, preferably 10-50 hours, more preferably 20-50 hours.
In accordance with the present invention it is preferred that, the oxidizing gas are carbon dioxide, carbon monoxide, water vapour
With at least one in oxygen；More preferably water vapour.
In addition, being preferably C as the reducibility gas6In following alkane, ammonia and hydrogen extremely
Few one kind；More preferably C6Following alkane and/or hydrogen.
The C6Following alkane is preferably methane, ethane, propane, butane or pentane；More preferably
Methane, ethane, propane or butane.
Can be water vapour, hydrogen and C as the low oxygen partial pressure atmosphere gas of the present invention6Following alkane
Mixed gas；At least one preferably in water vapour, hydrogen and methane, ethane, propane and butane
The mixed gas of gas (hereinafter also referred to paraffin gas).
Can also be water vapour and C as the low oxygen partial pressure atmosphere gas of the present invention6Following alkane it is mixed
Close gas；The mixing of at least one gas preferably in water vapour and methane, ethane, propane and butane
Gas.
In the present invention, the volumn concentration of the oxidizing gas in the low oxygen partial pressure atmosphere gas can
Think 8-90%, preferably 10-65%.The body of the reducibility gas in the low oxygen partial pressure atmosphere gas
Product percentage composition can be 10-92%, preferably 35-90%.By making oxidizing gas and reproducibility gas
Body within the above range, can be repaired preferably to manganese picotite thin film.
The present invention one preferred embodiment in, the low oxygen partial pressure atmosphere gas be water vapour,
Hydrogen and the paraffin gas (the also at least one gas in namely for methane, ethane, propane and butane)
Mixed gas, and in terms of volumn concentration, hydrogen is 5-45%, and water vapour is 10-65%, described
Paraffin gas is that (preferably in terms of volumn concentration, hydrogen is 5-45% to 30-85%, and water vapour is
10-65%, the paraffin gas is 30-45%).
The present invention one preferred embodiment in, the low oxygen partial pressure atmosphere gas be water vapour,
With the mixing of the paraffin gas (the also at least one gas in namely for methane, ethane, propane and butane)
Gas, and in terms of volumn concentration, water vapour is 10-65%, the paraffin gas is 35-90%.
In accordance with the present invention it is preferred that, the low oxygen partial pressure atmosphere gas also contain noble gases.More preferably
Ground, the volumn concentration of the noble gases in the low oxygen partial pressure atmosphere gas is 0-50%.
The noble gases are well known in the art, for example, at least one in nitrogen, argon and helium.
In the present invention, by being processed under these conditions, in the less oxidizing atmosphere gas
Partial pressure of oxygen is 1.0 × 10-34～1.0 × 10-12Atm, preferably 3 × 10-18～1.0 × 10-12atm。
According to the present invention, the cracking furnace pipe is the common nichrome boiler tube of prior art, with weight hundred
Fraction meter, the boiler tube matrix composition includes：Chromium 12-50%, nickel 20-50%, manganese 0.2-3%, silicon 0-3%,
The trace element and trace element of carbon 0-0.75%, 0-5%, balance of ferrum, the trace element is preferably
One or more in niobium, molybdenum, titanium, tungsten, aluminum, zirconium, rare earth, trace element is preferably sulfur and/or phosphorus.
Hereinafter will be described the present invention by embodiment, but the present invention is not limited in following realities
Apply example.
In following examples, the elementary composition of boiler tube matrix is：Cr：32.55、Ni：42.60、Fe：
21.12、Mn：0.98、Si：1.41、Nb:0.64、C：0.53rd, other：0.17 (wt%).
Embodiment 1
In the present embodiment, industrial pyrolysis furnace is the type pyrolysis furnaces of CRT- IV, and cracking stock is Petroleum,
Produce 60000 tons of ethylene per year.Former cracking furnace pipe is nichrome boiler tube, and most long period is run during cracking naphtha
About 100 days, be 200 using the nichrome boiler tube period 1 run time with manganese picotite thin film
My god, after multiple cycle of operations, pyrolysis furnace cycle of operation shortens to 150 days.Now online to cracking
Boiler tube manganese picotite thin film is repaired, and it is concretely comprised the following steps, after the completion of burning, in cracking furnace pipe
Inside it is passed through volume content and is respectively the mixed gas of 45% hydrogen, 45% methane, 10% water vapour to cracking
Boiler tube is repaired, wherein, the cracking furnace pipe inlet temperature of mixed gas is 600 DEG C, and intensification makes stove
Pipe outlet temperature (COT) repairs 35h to 950 DEG C.Then, coil outlet temperature cools to 830 DEG C,
Pyrolysis furnace is switched to naphtha pyrolysis raw material and carries out normal lytic operation, and period 1 run time is 200
My god, cracking furnace pipe manganese picotite thin film returns to original suppression coking ability.
Embodiment 2
In the present embodiment, industrial pyrolysis furnace is the type pyrolysis furnaces of CRT- IV, and cracking stock is Petroleum,
Produce 60000 tons of ethylene per year.Former cracking furnace pipe is nichrome boiler tube, and most long period is run during cracking naphtha
About 100 days, be 200 using the nichrome boiler tube period 1 run time with manganese picotite thin film
My god, after multiple cycle of operations, pyrolysis furnace cycle of operation shortens to 150 days.Now online to cracking
Boiler tube manganese picotite thin film is repaired, and it is concretely comprised the following steps, after the completion of burning, in cracking furnace pipe
Inside it is passed through volume content and is respectively 20% hydrogen, 20% ethane, 20% propane, the mixing of 40% water vapour
Gas is repaired to cracking furnace pipe, wherein, the cracking furnace pipe inlet temperature of mixed gas is 600 DEG C,
And intensification makes coil outlet temperature to 850 DEG C, 50h is repaired.Then, coil outlet temperature is cooled to
830 DEG C, pyrolysis furnace is switched to naphtha pyrolysis raw material and carries out normal lytic operation, when the period 1 is run
Between be 200 days, cracking furnace pipe manganese picotite thin film returns to original suppression coking ability.
Embodiment 3
In the present embodiment, industrial pyrolysis furnace is the type pyrolysis furnaces of CRT- IV, and cracking stock is Petroleum,
Produce 60000 tons of ethylene per year.Former cracking furnace pipe is nichrome boiler tube, and most long period is run during cracking naphtha
About 100 days, be 200 using the nichrome boiler tube period 1 run time with manganese picotite thin film
My god, after multiple cycle of operations, pyrolysis furnace cycle of operation shortens to 150 days.Now online to cracking
Boiler tube manganese picotite thin film is repaired, and it is concretely comprised the following steps, after the completion of burning, in cracking furnace pipe
Inside it is passed through volume content and is respectively the mixed gas of 5% hydrogen, 30% butane, 65% water vapour to cracking
Boiler tube is repaired, wherein, the cracking furnace pipe inlet temperature of mixed gas is 600 DEG C, and intensification makes stove
Pipe outlet temperature repairs 20h to 800 DEG C.Then, coil outlet temperature is warmed up to 830 DEG C, pyrolysis furnace
Being switched to naphtha pyrolysis raw material carries out normal lytic operation, and period 1 run time is 200 days, is split
Solution boiler tube manganese picotite thin film returns to original suppression coking ability.
Embodiment 4
Method according to embodiment 1 is carried out, and except for the difference that, is passed through volume content in pyrolysis furnace and is respectively
The gaseous mixture of 90% methane and 10% water vapour is repaired to cracking furnace pipe.After reparation, pyrolysis furnace switching
Normal lytic operation is carried out to naphtha pyrolysis raw material, period 1 run time is 190 days, pyrolysis furnace
Pipe manganese picotite thin film returns to original suppression coking ability.
Embodiment 5
Method according to embodiment 2 is carried out, and except for the difference that, is passed through volume content in pyrolysis furnace and is respectively
The gaseous mixture of 30% ethane, 30% propane and 40% water vapour is repaired to cracking furnace pipe.After reparation,
Pyrolysis furnace is switched to naphtha pyrolysis raw material and carries out normal lytic operation, and period 1 run time is 192
My god, cracking furnace pipe manganese picotite thin film returns to original suppression coking ability.
Embodiment 6
Method according to embodiment 3 is carried out, and except for the difference that, is passed through volume content in pyrolysis furnace and is respectively
The gaseous mixture of 35% butane and 65% water vapour is repaired to cracking furnace pipe.After reparation, pyrolysis furnace switching
Normal lytic operation is carried out to naphtha pyrolysis raw material, period 1 run time is 195 days, pyrolysis furnace
Pipe manganese picotite thin film returns to original suppression coking ability.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, can be to the technical side of the present invention
Case carries out various simple variants, and these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique described in above-mentioned specific embodiment is special
Levy, in the case of reconcilable, can be combined by any suitable means, in order to avoid need not
The repetition wanted, the present invention is no longer separately illustrated to various possible compound modes.
Additionally, combination in any can also be carried out between a variety of embodiments of the present invention, as long as its
Without prejudice to the thought of the present invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. it is a kind of it is online repair cracking furnace pipe manganese picotite thin film method, it is characterised in that the party
Method includes：After pyrolysis furnace charring terminates, low oxygen partial pressure atmosphere gas are passed through in pyrolysis furnace to pyrolysis furnace
Pipe carries out heat treatment, wherein, it is in the cracking furnace pipe inlet temperature of the low oxygen partial pressure atmosphere gas
The cracking furnace pipe outlet temperature of 580-650 DEG C and the low oxygen partial pressure atmosphere gas is 750-1100 DEG C of bar
Heat treatment 5-100 hours are carried out under part, the low oxygen partial pressure atmosphere gas are containing oxidizing gases and reduction
Property gas.
2. method according to claim 1, wherein, the oxidizing gas be carbon dioxide,
At least one in carbon monoxide, water vapour and oxygen, the reducibility gas are C6Following alkane,
At least one in ammonia and hydrogen.
3. method according to claim 2, wherein, the low oxygen partial pressure atmosphere gas are that water steams
Vapour, hydrogen and C6The mixed gas of following alkane.
4. method according to claim 3, wherein, the low oxygen partial pressure atmosphere gas are that water steams
The mixed gas of at least one gas in vapour, hydrogen and methane, ethane, propane and butane.
5. method according to claim 2, wherein, the low oxygen partial pressure atmosphere gas are that water steams
The mixed gas of at least one gas in vapour and methane, ethane, propane and butane.
6. the method according to any one in claim 1-5, wherein, the low oxygen partial pressure gas
The volumn concentration of the oxidizing gas in atmosphere gas is 8-90%.
7. method according to claim 6, wherein, in the low oxygen partial pressure atmosphere gas also
The volumn concentration of originality gas is 10-92%.
8. method according to claim 7, wherein, the low oxygen partial pressure atmosphere gas also contain
Noble gases, the volumn concentration of the noble gases in the low oxygen partial pressure atmosphere gas is 0-50%.
9. the method according to any one in claim 1-5, wherein, the low oxygen partial pressure gas
The cracking furnace pipe inlet temperature of atmosphere gas is 600-620 DEG C.
10. method according to claim 9, wherein, the cracking of the low oxygen partial pressure atmosphere gas
Coil outlet temperature is 800-950 DEG C, and the time of heat treatment is 20-50 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510666254.1A CN106590724B (en) | 2015-10-15 | 2015-10-15 | A kind of online method for repairing cracking furnace pipe manganese picotite film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510666254.1A CN106590724B (en) | 2015-10-15 | 2015-10-15 | A kind of online method for repairing cracking furnace pipe manganese picotite film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106590724A true CN106590724A (en) | 2017-04-26 |
| CN106590724B CN106590724B (en) | 2018-07-20 |
Family
ID=58552249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510666254.1A Active CN106590724B (en) | 2015-10-15 | 2015-10-15 | A kind of online method for repairing cracking furnace pipe manganese picotite film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106590724B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101094A (en) * | 2018-10-29 | 2020-05-05 | 中国石油化工股份有限公司 | Method for repairing furnace tube inner wall oxide layer on line |
| CN111690961A (en) * | 2020-07-14 | 2020-09-22 | 四川轻化工大学 | Preparation of nitrogen-doped MnCr on FeCrNi alloy surface2O4Method for coating |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899067A (en) * | 2011-07-29 | 2013-01-30 | 中国石油化工股份有限公司 | Cracking furnace tube, and preparation method and application thereof |
| CN103788983A (en) * | 2012-10-30 | 2014-05-14 | 中国石油化工股份有限公司 | Coking-resistant hydrocarbon cracking furnace pipe and preparation method thereof |
| CN103788986A (en) * | 2012-10-30 | 2014-05-14 | 中国石油化工股份有限公司 | Coking-inhibition hydrocarbon cracking furnace pipe and preparation method thereof |
-
2015
- 2015-10-15 CN CN201510666254.1A patent/CN106590724B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899067A (en) * | 2011-07-29 | 2013-01-30 | 中国石油化工股份有限公司 | Cracking furnace tube, and preparation method and application thereof |
| CN103788983A (en) * | 2012-10-30 | 2014-05-14 | 中国石油化工股份有限公司 | Coking-resistant hydrocarbon cracking furnace pipe and preparation method thereof |
| CN103788986A (en) * | 2012-10-30 | 2014-05-14 | 中国石油化工股份有限公司 | Coking-inhibition hydrocarbon cracking furnace pipe and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101094A (en) * | 2018-10-29 | 2020-05-05 | 中国石油化工股份有限公司 | Method for repairing furnace tube inner wall oxide layer on line |
| CN111690961A (en) * | 2020-07-14 | 2020-09-22 | 四川轻化工大学 | Preparation of nitrogen-doped MnCr on FeCrNi alloy surface2O4Method for coating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106590724B (en) | 2018-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105441112B (en) | Method for online treating of inner surface of hydrocarbon cracking furnace tube | |
| JP6486532B2 (en) | Nickel-chromium-alloy | |
| CN102807887B (en) | Cracking furnace tube for inhibiting catalytic coking of hydrocarbon cracking furnace tube, and manufacturing method thereof | |
| CN103788983A (en) | Coking-resistant hydrocarbon cracking furnace pipe and preparation method thereof | |
| CN105087046A (en) | Method for treating high temperature alloy furnace tube, and high temperature alloy furnace tube | |
| JP4632629B2 (en) | How to treat stainless steel matrix | |
| JP5112597B2 (en) | Stainless steel matrix surface | |
| CN106590725A (en) | Method for treating internal surface of pyrolysis furnace tube | |
| RU2293912C2 (en) | Method and device for reducing gas temperature | |
| CN105154811A (en) | Method for processing anti-coking alloy material | |
| CN103788986A (en) | Coking-inhibition hydrocarbon cracking furnace pipe and preparation method thereof | |
| JPS6331535A (en) | Apparatus for treating carbon-containing compound having carbon precipitation suppressing property | |
| CN106590724A (en) | Method for on-line repairing of manganese chromium spinel thin film of cracking furnace pipe | |
| CA3075483C (en) | Aluminum oxide forming heat transfer tube for thermal cracking | |
| CN104293371B (en) | A kind of method of online preoxidation hydrocarbon cracking boiler tube | |
| US5693155A (en) | Process for using anti-coking steels for diminishing coking in a petrochemical process | |
| Bao et al. | Anti-coking effect of MnCr2O4 spinel coating during light naphtha thermal cracking | |
| CN102251225B (en) | Treatment method and coating pretreatment liquid for reducing coking of furnace tube of hydrocarbon cracking furnace | |
| CN106554799A (en) | Pyrolysis furnace nichrome boiler tube and preparation method thereof | |
| CN106591796B (en) | A method of manganese picotite coating is prepared in cracking furnace pipe inner surface online | |
| CN107881393B (en) | Anti-coking alloy material, preparation method thereof and anti-coking cracking furnace tube | |
| US11981875B2 (en) | Erosion resistant alloy for thermal cracking reactors | |
| US11939544B2 (en) | Decoking process | |
| CN117946723A (en) | Quenching boiler for slowing down coking and carburizing, and preparation method and application thereof | |
| CN106590726A (en) | Method for protecting manganese-chromium spinel film of cracking furnace tube against burning |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |