CN101318872B - Ethylene cracking furnace coking restrainer and its use method - Google Patents
Ethylene cracking furnace coking restrainer and its use method Download PDFInfo
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- CN101318872B CN101318872B CN200810116969XA CN200810116969A CN101318872B CN 101318872 B CN101318872 B CN 101318872B CN 200810116969X A CN200810116969X A CN 200810116969XA CN 200810116969 A CN200810116969 A CN 200810116969A CN 101318872 B CN101318872 B CN 101318872B
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- 238000004939 coking Methods 0.000 title claims abstract description 102
- 238000005336 cracking Methods 0.000 title claims abstract description 57
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000005977 Ethylene Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000837 restrainer Substances 0.000 title claims description 8
- -1 thiol compound Chemical class 0.000 claims abstract description 10
- SMWDFEZZVXVKRB-UHFFFAOYSA-N anhydrous quinoline Natural products N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims abstract description 8
- WVYADZUPLLSGPU-UHFFFAOYSA-N carboxyphenyl salicylate Natural products OC(=O)C1=CC=CC=C1OC(=O)C1=CC=CC=C1O WVYADZUPLLSGPU-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229960000953 salsalate Drugs 0.000 claims abstract description 8
- 239000003960 organic solvent Substances 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims abstract description 3
- 239000007924 injection Substances 0.000 claims abstract description 3
- 239000003112 inhibitor Substances 0.000 claims description 79
- WBDRVMIJNFZLMN-UHFFFAOYSA-N 2-phenylpropane-2-thiol Chemical compound CC(C)(S)C1=CC=CC=C1 WBDRVMIJNFZLMN-UHFFFAOYSA-N 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 claims description 4
- 239000004215 Carbon black (E152) Substances 0.000 claims description 3
- WIHIUTUAHOZVLE-UHFFFAOYSA-N 1,3-diethoxypropan-2-ol Chemical compound CCOCC(O)COCC WIHIUTUAHOZVLE-UHFFFAOYSA-N 0.000 claims description 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 claims description 2
- CUBCNYWQJHBXIY-UHFFFAOYSA-N benzoic acid;2-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=CC=C1.OC(=O)C1=CC=CC=C1O CUBCNYWQJHBXIY-UHFFFAOYSA-N 0.000 claims description 2
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 claims description 2
- WMXCDAVJEZZYLT-UHFFFAOYSA-N tert-butylthiol Chemical compound CC(C)(C)S WMXCDAVJEZZYLT-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 32
- 239000003208 petroleum Substances 0.000 description 16
- 150000003254 radicals Chemical class 0.000 description 7
- WQOXQRCZOLPYPM-UHFFFAOYSA-N dimethyl disulfide Chemical group CSSC WQOXQRCZOLPYPM-UHFFFAOYSA-N 0.000 description 6
- 239000002010 green coke Substances 0.000 description 6
- 238000006555 catalytic reaction Methods 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- 229940111121 antirheumatic drug quinolines Drugs 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- VLXBWPOEOIIREY-UHFFFAOYSA-N dimethyl diselenide Natural products C[Se][Se]C VLXBWPOEOIIREY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 150000003248 quinolines Chemical class 0.000 description 2
- 238000007348 radical reaction Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The present invention relates to a coking depressor for an ethylene cracking furnace, and a method for using the same. The depressor consists of a thiol compound, a quinoline compound, a disalicylic acid compound and an organic solvent. The coking depressor not only overcomes the shortcomings in the prior depressor that the manufacturing cost is high, the injection operation is difficult, the distribution in the cracking furnace tube is uneven, and the depressor erodes the inner wall of the furnace tube, etc., but also effectively prolongs the service life of the cracking furnace and improvesthe yield of ethylene, the usage of the material and the load of an ethylene device. The producing amount of CO and CO2 is largely reduced, and thus the depressor is safe and environment-friendly.
Description
Technical field:
The present invention relates to a kind of ethylene cracking furnace coking restrainer and using method thereof.
Background technology:
Ethane cracking furnace is an important core equipment of producing ethene, and only about half of above energy all consumes in pyrolyzer.Because pyrolyzer is the high-temperature component in the ethylene unit, when taking place, the hydrocarbon cracking reaction can be attended by the generation of secondary reactions such as polymerization and condensation, in the catalysis of furnace wall metal and material, under the acting in conjunction of free radical reaction, cause at pyrolyzer tube wall generation coking phenomenon.The coking meeting increases wall resistance, reduces the tube wall heat transfer coefficient, causes the wall temperature rising and the local superheating phenomenon occurs; Coking also can make the boiler tube internal diameter diminish, and liquid pressure drop raises, and causes treatment capacity to reduce, and yield of ethene reduces; Coking also can be corroded boiler tube, and coke can infiltrate boiler tube and form carburizing, reduces the boiler tube mechanical property, influences tubing intensity, reduces the boiler tube life-span.Coking strengthens the energy consumption of ethylene production, and needs frequent coke cleaning, replacing boiler tube, has reduced the cycle of operation of ethylene unit, causes the production cost of ethene significantly to increase.
Adopted several different methods to solve the ethylene unit coking problem at present, comprised and add coking inhibitor, improve furnace tube material and at the boiler tube top coat etc.But at present in the various coking inhibition technology of exploitation, though there is certain difficulty in the method that add to suppress in operating process, and the part coking inhibitor has corrosive nature to boiler tube, and it is not subjected to high temperature limit, also need not to change original processing unit, is one of effective means at present.
The Nalco company of the U.S. propose through the mixture of water-soluble amine neutral phosphoric acid ester and thiophosphatephosphorothioate as coking inhibitor (US6497809,2002) and (US5358626 of Tetra company, 1994) coking inhibitor of Ti Chuing is composited by inorganic salt, uses with the form of the aqueous solution.But there is the production cost height in above-mentioned coking inhibitor, and implant operation is comparatively difficult in ethylene unit, there is certain corrodibility in the cracking furnace wall, and can not be dispersed in the boiler tube internal surface uniformly.Domestic coking inhibitor commonly used mainly is Methyl disulfide (DMDS) (" petrochemical complex ", 2005 the 34th volume supplementary issue), and this coking inhibitor can passivation cracking furnace pipe metallic surface, alleviates the generation of coking in the pyrolyzer to a certain extent.Though the production cost of this coking inhibitor is not high, but component is single, it is general to suppress effect, pollute bigger, when usage quantity is above greater than 300ppm, only can makes the cycle of operation of device reach 50～70 days, and the cracking furnace wall is had bigger corrodibility, the life-span of boiler tube and the yield and the utilization ratio of raw materials of ethene can not be effectively improved, CO and CO can not be effectively reduced
2Turnout, also exist simultaneously the shortcoming that coking inhibitor can not be evenly distributed in green coke boiler tube internal surface.
Summary of the invention:
The object of the present invention is to provide a kind of ethylene cracking furnace coking restrainer and using method thereof.Adopt sulfur alcohol compound, quinolines and salicyl salicylic acid diplosal compounds to carry out assembly, do not damaging boiler tube, do not corroding the boiler tube inwall, do not influencing under the prerequisite of derived product, safety and environmental protection, making coking inhibitor be evenly distributed, improve inhibition coking effect at the cracking furnace pipe internal surface.
The invention main points:
Ethylene cracking furnace coking restrainer effective constituent comprises A component, B component, C component and organic solvent, and the A component is a sulfur alcohol compound, is selected from uncle's lauryl mercaptan, tert.-butyl mercaptan, diethylin mercaptan or 2-phenyl-2-propylmercaptan, the B component is a quinolines, be selected from 2,2,4-trimethylbenzene-1,2-dihyaroquinoline polymer or 2, the 4-dimethyl quinoline, the C component is the salicyl salicylic acid diplosal compounds, is selected from 5,5 '-methylene-bis Whitfield's ointment or N, N '-salicyl salicylic acid diplosal propylene diamine.
It is 2-phenyl-2-propylmercaptan that A, B, C component are preferably the A component, and the B component is 2,2,4-trimethylbenzene-1, and 2-dichloride quinoline polymer, the C component is N, N '-salicyl salicylic acid diplosal propylene diamine.
Wherein the mass ratio of A component, B component, C component is: 1～8: 1～8: 1～8; Be preferably: 5～6: 3～4: 1～3.
Organic solvent is C
6～C
10Hydrocarbon, its consumption is not strict with, it is suitable A, B, C each component being dissolved fully and certain fluidity is arranged, preferably make the kinematic viscosity of above-mentioned coking inhibitor in the time of 40 ℃, remain on 1～2 scope for well, under this range of viscosities, coking inhibitor of the present invention easy freezing not under low temperature environment can be injected by electromagnetic pump easily, also be of value to simultaneously and mix, it is evenly distributed in the middle of the boiler tube with stock oil.
The present invention also provides a kind of using method that is used for the ethylene unit cracking furnace coking restrainer, above-mentioned coking inhibitor on-line continuous is injected stock oil, can adopt electromagnetic pump to inject in pyrolyzer stock oil ingress, the concentration after the injection is 10～500ppm, is preferably 100～300ppm.
The present invention obtains on the basis to the research of ethylene unit cracking furnace coking principle, and the mechanism of pyrolyzer tube wall coking is very complicated, and what play a major role comprises catalysis green coke process and free radical green coke process.Coking inhibitor of the present invention is the compound coking inhibitor of a kind of polycomponent, at high temperature can generate the HS free radical, this free radical generates sulphided state Ni together with pyrolyzer tube wall metal Ni reaction on the one hand, makes the metallic surface that passivation take place, and suppresses catalysis green coke process; On the other hand, this free radical can change original free radical reaction course in the boiler tube, suppresses free radical green coke process; Coking inhibitor of the present invention not only can change the structure of original coking layer in the furnace wall simultaneously, and it is come off easily, reaches the purpose of coke cleaning, and can protect the boiler tube inwall not corroded.
Coking inhibitor of the present invention can substitute Methyl disulfide (DMDS) fully, on-line continuous is injected, easy and simple to handle and can evenly spread to green coke boiler tube internal surface, the metallic surface of passivation cracking furnace tube more effectively, prevent the generation of carburizing and the burnt matter of prevention, the heat that improves pyrolyzer passes low rate and the yield of selectivity raising ethene and the utilization ratio of utilization ratio of raw materials and device.Coking inhibitor of the present invention not only to pyrolyzer without any infringement, and environment do not had hazardness, can effectively prolong the work-ing life of cracking furnace tube, reduce the metallic surface temperature and the boiler tube pressure reduction of cracking furnace tube.Heavy constituent together distillate with oil fuel from the quenching oil column bottom in pyrolyzer, can not produce any influence to down-stream system and product.Fundamentally improve the problem of coking in the cracking furnace pipe, improve the cycle of operation of ethane cracking furnace, and significantly reduce CO and CO
2Generation.
Be evenly distributed, suppress at the cracking furnace pipe internal surface that coking is effective, all can not damage boiler tube in the use amount ranges in above-mentioned proposition, can derived product not exerted an influence, the preparation and the using method thereof of the composite inhibitor of safety and environmental protection.Thereby reduce the energy consumption of ethylene production, improve the yield and the raw material availability of ethene, improve cracking furnace tube work-ing life, prolong the working time of ethylene unit pyrolyzer effectively, for ethylene production is brought considerable economic.
Embodiment:
Embodiment 1～16 is coking inhibitor each component, proportioning and preparation example, and embodiment 17～32 is the example of coking inhibitor using method.
Under constantly stirring, with the quality note, in organic solvent (commercially available 2# solvent), add table 1 and each given compound component of table 2, make it evenly mixed, promptly make cracking furnace coking restrainer of the present invention.Method according to GB/T265-88 is measured, and the kinematic viscosity of Scale inhibitors is 1～2 in the time of 40 ℃.
Table 1: embodiment 1～8 coking inhibitor component and proportioning (data are mass fraction in the table)
Table 2: embodiment 9～16 coking inhibitor components and proportioning (data are mass fraction in the table)
Embodiment 17
The coking inhibitor of example 1 is applied to simulate the pyrolyzer experiment, and the experiment type of furnace is STRIII, and setting cracking temperature is 880 ℃, and stock oil is petroleum naphtha, and wherein steam oil ratio (SOR) is 0.6; Adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is 0.1s, and the mass concentration of injecting the back coking inhibitor is 500ppm.The equipment cycle of operation is 130 days, and total triolefin yield is 52.84%.
Embodiment 18
The coking inhibitor of example 2 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, and setting cracking temperature is 880 ℃, and stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, and the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 450ppm after 0.1s injected.The equipment cycle of operation is 126 days, and total triolefin yield is 52.67%.
Embodiment 19
The coking inhibitor of example 3 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 400ppm after 0.1s injected.The equipment cycle of operation is 123 days, and total triolefin yield is 51.36%.
Embodiment 20
The coking inhibitor of example 4 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 350ppm after 0.1s injected.The equipment cycle of operation is 116 days, and total triolefin yield is 50.08%.
Embodiment 21
The coking inhibitor of example 5 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 300ppm after 0.1s injected.The equipment cycle of operation is 112 days, and total triolefin yield is 50.18%.
Embodiment 22
The coking inhibitor of example 6 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 275ppm after 0.1s injected.The equipment cycle of operation is 112 days, and total triolefin yield is 49.95%.
Embodiment 23
The coking inhibitor of example 7 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 250ppm after 0.1s injected.The equipment cycle of operation is 110 days, and total triolefin yield is 49.84%.
Embodiment 24
The coking inhibitor of example 8 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 225ppm after 0.1s injected.The equipment cycle of operation is 110 days, and total triolefin yield is 49.91%.
Embodiment 25
The coking inhibitor of example 9 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 200ppm after 0.1s injected.The equipment cycle of operation is that 107 days total triolefin yields are 49.75%.
Embodiment 26
The coking inhibitor of example 10 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 175ppm after 0.1s injected.The equipment cycle of operation is 100 days, and total triolefin yield is 49.57%.
Embodiment 27
The coking inhibitor of example 11 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 150ppm after 0.1s injected.The equipment cycle of operation is that 93 days total triolefin yields are 49.32%.
Embodiment 28
The coking inhibitor of example 12 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 125ppm after 0.1s injected.The equipment cycle of operation is 86 days, and total triolefin yield is 49.08%.
Embodiment 29
The coking inhibitor of example 13 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 100ppm after 0.1s injected.The equipment cycle of operation is 79 days, and total triolefin yield is 48.97%.
Embodiment 30
The coking inhibitor of example 14 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 75ppm after 0.1s injected.The equipment cycle of operation is 74 days, and total triolefin yield is 48.43%.
Embodiment 31
The coking inhibitor of example 15 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 50ppm after 0.1s injected.The equipment cycle of operation is 60 days, and total triolefin yield is 48.17%.
Embodiment 32
The coking inhibitor of example 16 is applied to simulate the pyrolyzer experiment, the experiment type of furnace is STRIII, setting cracking temperature is 880 ℃, stock oil is petroleum naphtha, wherein steam oil ratio (SOR) is 0.6, adopt electromagnetic pump that coking inhibitor is injected stock oil in pyrolyzer stock oil ingress on-line continuous, the residence time in cracking furnace pipe is that the mass concentration of coking inhibitor was 10ppm after 0.1s injected.The equipment cycle of operation is 50 days, and total triolefin yield is 48.03%.
Claims (8)
1. an ethylene cracking furnace coking restrainer is made up of A component, B component, C component and organic solvent, it is characterized in that: the mass ratio of A component, B component, C component is 1～8: 1～8: 1～8;
Wherein: the A component is a mercaptan compound; The B component is a quinoline compound; The C component is the salicyl salicylic acid diplosal compound; Organic solvent is C
6～C
10Hydrocarbon.
2. according to the coking inhibitor of claim 1, it is characterized in that: the mass ratio of A component, B component, C component is 5～6: 3～4: 1～3.
3. according to the coking inhibitor of claim 1, it is characterized in that: the add-on of organic solvent makes the kinematic viscosity of coking inhibitor remain on 1～2 scope in the time of 40 ℃.
4. according to the coking inhibitor of claim 1 or 2, it is characterized in that: the A component is uncle's lauryl mercaptan, tert.-butyl mercaptan, diethylin mercaptan or 2-phenyl-2-propylmercaptan, the B component is 2,2,4-trimethylbenzene-1,2-dihyaroquinoline polymer or 2, the 4-dimethyl quinoline, the C component is 5,5 '-methylene-bis Whitfield's ointment or N, N '-salicyl salicylic acid diplosal propylene diamine.
5. according to the coking inhibitor of claim 1 or 2, it is characterized in that: the A component is 2-phenyl-2-propylmercaptan, and the B component is 2,2,4-trimethylbenzene-1, and 2-dichloride quinoline polymer, the C component is N, N '-salicyl salicylic acid diplosal propylene diamine.
6. the using method of any coking inhibitor of a claim 1 to 5 is injected stock oil with the coking inhibitor on-line continuous, and the concentration after the injection is 10～500ppm.
7. according to the using method of claim 6, it is characterized in that: the concentration after coking inhibitor injects is 100～300ppm.
8. according to the using method of claim 6, it is characterized in that: coking inhibitor injects in pyrolyzer stock oil ingress.
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| CN200810116969XA CN101318872B (en) | 2008-07-22 | 2008-07-22 | Ethylene cracking furnace coking restrainer and its use method |
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| CN101318872B true CN101318872B (en) | 2010-12-15 |
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| CN103421531B (en) * | 2013-07-19 | 2015-08-12 | 金昌市万隆实业有限责任公司 | One alleviates cracking furnace pipe method for coke |
| CN106365938B (en) * | 2016-09-05 | 2018-10-30 | 北京山鹰环境工程技术有限公司 | A kind of preparation and its application method for ethylene unit dispersant with high efficiency |
| CN109266391A (en) * | 2018-09-26 | 2019-01-25 | 宜兴汉光高新石化有限公司 | A kind of dosage is small, extend the device fouling period plus hydrogen antisludging agent and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247887A (en) * | 1999-09-10 | 2000-03-22 | 中国石油化工集团公司北京化工研究院 | Method for inhibiting ethylene cracking device from coking |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247887A (en) * | 1999-09-10 | 2000-03-22 | 中国石油化工集团公司北京化工研究院 | Method for inhibiting ethylene cracking device from coking |
Non-Patent Citations (1)
| Title |
|---|
| 顾绮川等.乙烯裂解结焦抑制剂的研究进展.《广州化工》.2005,第33卷(第3期),19-21. * |
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