CN112680243A - Method for preventing settler from coking - Google Patents
Method for preventing settler from coking Download PDFInfo
- Publication number
- CN112680243A CN112680243A CN202011450398.0A CN202011450398A CN112680243A CN 112680243 A CN112680243 A CN 112680243A CN 202011450398 A CN202011450398 A CN 202011450398A CN 112680243 A CN112680243 A CN 112680243A
- Authority
- CN
- China
- Prior art keywords
- coking
- settler
- steam
- toluene
- additive
- 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.)
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- 238000004939 coking Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 17
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000654 additive Substances 0.000 claims abstract description 24
- 230000000996 additive effect Effects 0.000 claims abstract description 24
- 239000002270 dispersing agent Substances 0.000 claims abstract description 13
- 239000006229 carbon black Substances 0.000 claims abstract description 10
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims abstract description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 6
- 239000003999 initiator Substances 0.000 claims description 6
- 239000000178 monomer Substances 0.000 claims description 6
- WYQZDQZBXHWQMW-UHFFFAOYSA-N 3-methylhexane-2,2-diamine Chemical compound CCCC(C)C(C)(N)N WYQZDQZBXHWQMW-UHFFFAOYSA-N 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- -1 acrylic ester Chemical class 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- VZGDMQKNWNREIO-UHFFFAOYSA-N carbon tetrachloride Substances ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 3
- 239000012986 chain transfer agent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 3
- 239000000571 coke Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 17
- 238000004523 catalytic cracking Methods 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Abstract
The invention discloses a method for preventing a settler from coking, which relates to the field of petrochemical industry, and comprises the following steps: step a: preparing a dispersing agent, mixing 15g of dried carbon black, 2.0g of dispersing agent solution and 150ml of toluene, and grinding the mixture in an QZM-1 type conical mill until the fineness of a scraper is 5 mu m to obtain the anti-coking additive of the toluene/carbon black dispersing system; step b: and adding the anti-coking additive into the anti-coking steam, and spraying the anti-coking additive into an anti-coking steam pipeline through a nozzle so as to enable the anti-coking steam pipeline to enter a settler along with the steam. According to the invention, the anti-coking additive is added into the anti-coking steam, and is sprayed into the anti-coking steam pipeline through the nozzle, so that the anti-coking additive enters the settler along with the steam, oil gas is difficult to adsorb on the wall of the settler, and coking nuclei are provided for the coking which cannot be prevented, thereby preventing the oil gas from being accumulated on the wall of the settler to coke, and prolonging the operation period of the device.
Description
Technical Field
The invention relates to the field of petrochemical industry, in particular to a method for preventing a settler from coking.
Background
The catalytic cracking is the most important secondary processing process in the oil refining industry in China, and the fundamental purpose of the catalytic cracking is to improve the processing depth and the product quality of crude oil and increase the yield and the variety of light oil. The catalytic cracking raw material is generally heavy distillate oil, but with the continuous development of catalytic cracking process and catalytic technology, the catalytic cracking raw material is widened to atmospheric residue and even vacuum residue. However, after the residual oil is blended in the catalytic cracking process, the system is easily coked seriously, when the settler is coked to a certain degree, the operating conditions such as gas phase linear speed, pressure and the like in the settler fluctuate greatly, particularly the temperature is reduced rapidly, so that coke blocks in the settler fall off in a large area and are blocked on a grid of a stripping section, the catalyst is abnormally circulated or even cannot be circulated, the shutdown is forced, and the long-period operation of a catalytic device is directly influenced. Therefore, the prevention of the settler from coking is of great importance to ensure the long-term operation of the catalytic device.
Disclosure of Invention
In order to overcome the defects of related products in the prior art, the invention provides a method for preventing a settler from coking, so that oil gas is prevented from being accumulated on the wall of the settler to coke, and the operation period of the device is prolonged.
The invention provides a method for preventing a settler from coking, which comprises the following steps: step a: preparing a dispersing agent, mixing 15g of dried carbon black, 2.0g of dispersing agent solution and 150ml of toluene, and grinding the mixture in an QZM-1 type conical mill until the fineness of a scraper is 5 mu m to obtain the anti-coking additive of the toluene/carbon black dispersing system; step b: and adding the anti-coking additive into the anti-coking steam, and spraying the anti-coking additive into an anti-coking steam pipeline through a nozzle so as to enable the anti-coking steam pipeline to enter a settler along with the steam.
In certain embodiments of the present invention, in step a, the dispersant is prepared by: 215ml of toluene was added to a 500ml flask and refluxed for 20 min; then, 25ml of each of acrylic ester and styrene is dripped into toluene mixed liquid which is taken as a monomer, 5ml of dimethyl pentanediamine is taken as a chain transfer agent and 2.5ml of di-tert-butyl peroxide is taken as an initiator at the reflux temperature of 180-200 ℃, and the whole dripping process is completed within 5 h; dropping initiator solution for 2 hr, adding Br2-CCl4The solution is used for checking the reaction condition; and after the end point is reached, adding 10ml of toluene diisocyanate for reaction for 1 hour, cooling to 65 ℃, adding 15ml of polar monomer polyether amine, and reacting for 30 min.
Compared with the prior art, the invention has the following advantages:
the method for preventing the settler from coking prepares the efficient anti-coking additive of the toluene/carbon black dispersion system, which has the characteristics of excellent dispersion performance, extremely slow natural settling, obvious dispersion and stabilization effects and the like, can inhibit oil gas from gathering and coking on the wall of the settler, effectively prevents oil gas molecules from gathering and coking on the wall due to the adsorption of a polar section of a dispersing agent and the oil gas in the additive and the repulsion of a nonpolar section to a metal wall, provides an effective coking nucleus for oil gas coking, promotes the coking nucleus to gather into coke powder particles with a certain size, enters a regenerator to burn off through cyclone separation of the settler, injects the anti-coking additive into an anti-coking steam pipeline through a nozzle by adding the anti-coking additive into the anti-coking steam pipeline, leads the anti-coking additive to enter the settler along with steam, and leads the oil gas to be difficult to be adsorbed on the wall of the settler, meanwhile, coking nuclei are provided for the coking which cannot be prevented, so that the oil gas is prevented from being accumulated on the wall of the device to coke, and the operation period of the device is prolonged.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present disclosure is set forth in order to provide a more thorough understanding thereof. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The invention provides a method for preventing a settler from coking, which comprises the following steps:
step a: preparing a dispersing agent, mixing 15g of dried carbon black, 2.0g of dispersing agent solution and 150ml of toluene, and grinding the mixture in an QZM-1 type conical mill until the fineness of a scraper is 5 mu m to obtain the anti-coking additive of the toluene/carbon black dispersing system.
Step b: and adding the anti-coking additive into the anti-coking steam, and spraying the anti-coking additive into an anti-coking steam pipeline through a nozzle so as to enable the anti-coking steam pipeline to enter a settler along with the steam.
In the embodiment of the present invention, in step a, the preparation of the dispersant specifically is: 215ml of toluene was added to a 500ml flask and refluxed for 20 min; then, 25ml of each of acrylic ester and styrene is dripped into toluene mixed liquid which is taken as a monomer, 5ml of dimethyl pentanediamine is taken as a chain transfer agent and 2.5ml of di-tert-butyl peroxide is taken as an initiator at the reflux temperature of 180-200 ℃, and the whole dripping process is completed within 5 h; dropping initiator solution for 2 hr, adding Br2-CCl4The solution is used for checking the reaction condition; and after the end point is reached, adding 10ml of toluene diisocyanate for reaction for 1 hour, cooling to 65 ℃, adding 15ml of polar monomer polyether amine, and reacting for 30 min.
The method for preventing the settler from coking prepares the efficient anti-coking additive of the toluene/carbon black dispersion system, which has the characteristics of excellent dispersion performance, extremely slow natural settling, obvious dispersion and stabilization effects and the like, can inhibit oil gas from gathering and coking on the wall of the settler, effectively prevents oil gas molecules from gathering and coking on the wall due to the adsorption of a polar section of a dispersing agent and the oil gas in the additive and the repulsion of a nonpolar section to a metal wall, provides an effective coking nucleus for oil gas coking, promotes the coking nucleus to gather into coke powder particles with a certain size, enters a regenerator to burn off through cyclone separation of the settler, injects the anti-coking additive into an anti-coking steam pipeline through a nozzle by adding the anti-coking additive into the anti-coking steam pipeline, leads the anti-coking additive to enter the settler along with steam, and leads the oil gas to be difficult to be adsorbed on the wall of the settler, meanwhile, coking nuclei are provided for the coking which cannot be prevented, so that the oil gas is prevented from being accumulated on the wall of the device to coke, and the operation period of the device is prolonged.
Those not described in detail in this specification are within the skill of the art. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent changes may be made in some of the features of the embodiments. All equivalents that can be substituted by the contents of the specification of the present invention and applied directly or indirectly to other related technical fields are within the scope of the present invention.
Claims (2)
1. A method of preventing coking in a settler, characterized by the steps of:
step a: preparing a dispersing agent, mixing 15g of dried carbon black, 2.0g of dispersing agent solution and 150ml of toluene, and grinding the mixture in an QZM-1 type conical mill until the fineness of a scraper is 5 mu m to obtain the anti-coking additive of the toluene/carbon black dispersing system;
step b: and adding the anti-coking additive into the anti-coking steam, and spraying the anti-coking additive into an anti-coking steam pipeline through a nozzle so as to enable the anti-coking steam pipeline to enter a settler along with the steam.
2. The method for preventing the settler from coking according to claim 1, wherein in step a, the dispersant is prepared by:
215ml of toluene was added to a 500ml flask and refluxed for 20 min; then, 25ml of each of acrylic ester and styrene is dripped into toluene mixed liquid which is taken as a monomer, 5ml of dimethyl pentanediamine is taken as a chain transfer agent and 2.5ml of di-tert-butyl peroxide is taken as an initiator at the reflux temperature of 180-200 ℃, and the whole dripping process is completed within 5 h; dropping initiator solution for 2 hr, adding Br2-CCl4The solution is used for checking the reaction condition; and after the end point is reached, adding 10ml of toluene diisocyanate for reaction for 1 hour, cooling to 65 ℃, adding 15ml of polar monomer polyether amine, and reacting for 30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011450398.0A CN112680243A (en) | 2020-12-09 | 2020-12-09 | Method for preventing settler from coking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011450398.0A CN112680243A (en) | 2020-12-09 | 2020-12-09 | Method for preventing settler from coking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112680243A true CN112680243A (en) | 2021-04-20 |
Family
ID=75448873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011450398.0A Pending CN112680243A (en) | 2020-12-09 | 2020-12-09 | Method for preventing settler from coking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112680243A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116850914A (en) * | 2023-09-04 | 2023-10-10 | 江苏博颂能源科技有限公司 | Propane dehydrogenation device reactor roof prevents burnt steam ring |
| WO2023226337A1 (en) * | 2022-05-23 | 2023-11-30 | 东南大学 | Oil-gas outlet anti-coking device and method for adsorption medium self-circulation regeneration |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4919792A (en) * | 1988-06-10 | 1990-04-24 | Mobil Oil Corporation | Clarification of slurry oil |
| CN102925196A (en) * | 2012-09-28 | 2013-02-13 | 沈阳石蜡化工有限公司 | Anti-coking device for high-temperature pyrolysis gas inlet of oil gas quench cooler |
| CN105482851A (en) * | 2016-01-25 | 2016-04-13 | 深圳市广昌达石油添加剂有限公司 | Scale inhibitor for oil refining technology process and preparation method thereof |
| CN110627662A (en) * | 2019-09-23 | 2019-12-31 | 山东益丰生化环保股份有限公司 | Detergent dispersant and oil slurry scale inhibitor containing same |
-
2020
- 2020-12-09 CN CN202011450398.0A patent/CN112680243A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4919792A (en) * | 1988-06-10 | 1990-04-24 | Mobil Oil Corporation | Clarification of slurry oil |
| CN102925196A (en) * | 2012-09-28 | 2013-02-13 | 沈阳石蜡化工有限公司 | Anti-coking device for high-temperature pyrolysis gas inlet of oil gas quench cooler |
| CN105482851A (en) * | 2016-01-25 | 2016-04-13 | 深圳市广昌达石油添加剂有限公司 | Scale inhibitor for oil refining technology process and preparation method thereof |
| CN110627662A (en) * | 2019-09-23 | 2019-12-31 | 山东益丰生化环保股份有限公司 | Detergent dispersant and oil slurry scale inhibitor containing same |
Non-Patent Citations (2)
| Title |
|---|
| 谢海峰等: "浅析重油催化裂化装置结焦原因及防止对策", 《广州化工》 * |
| 邓汉和: "沉降器旋分器和油气大管结焦分析及防治", 《广东化工》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226337A1 (en) * | 2022-05-23 | 2023-11-30 | 东南大学 | Oil-gas outlet anti-coking device and method for adsorption medium self-circulation regeneration |
| CN116850914A (en) * | 2023-09-04 | 2023-10-10 | 江苏博颂能源科技有限公司 | Propane dehydrogenation device reactor roof prevents burnt steam ring |
| CN116850914B (en) * | 2023-09-04 | 2023-12-05 | 江苏博颂能源科技有限公司 | Propane dehydrogenation device reactor roof prevents burnt steam ring |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210420 |
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| RJ01 | Rejection of invention patent application after publication |