CN103242880B - High-quality impregnant asphalt production process - Google Patents
High-quality impregnant asphalt production process Download PDFInfo
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- CN103242880B CN103242880B CN201310166409.6A CN201310166409A CN103242880B CN 103242880 B CN103242880 B CN 103242880B CN 201310166409 A CN201310166409 A CN 201310166409A CN 103242880 B CN103242880 B CN 103242880B
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Abstract
The invention discloses a high-quality impregnant asphalt production process. The high-quality impregnant asphalt production process is characterized by comprising the following steps of: mixing first solvent coal oil and second solvent washing oil for extraction by using a pipeline mixer, and then feeding the mixture into a stirring tank; feeding raw material coal asphalt into the stirring tank for stirring; pumping the stirred raw material coal asphalt into a first settling tank through an oil pump; pumping a heavy phase part in the first settling tank into a quinoline insoluble centrifugal removal device through the oil pump, and centrifugally removing quinoline insoluble residue; returning a material from which the quinoline insoluble residue is removed into the first settling tank; when the storage amount of mixed liquid in the first settling tank reaches the limit, enabling the mixed liquid to enter into a second settling tank, and standing; after lamination occurs in the second settling tank, heating a light phase component in the second settling tank through a first heating furnace, and pumping the light phase component into a first depressurizing distillation tower for depressurizing distillation; and removing a solvent, and thus obtaining a target product, namely high-quality impregnant asphalt. The high-quality impregnant asphalt production process is used for producing the high-quality impregnant asphalt. The product yield is high and can exceed 60 percent. The temperature of a softening point of a product is 70 to 90 DEG C. The ash content can be controlled to be 0.01 to 0.1 percent.
Description
Technical field
This patent relates to Coal Chemical Industry industry coal-tar pitch product deep processing field, is specifically related to a kind of high-quality dipping agent bitumen production technique.
Background technology
In Coal Chemical Industry industry, coal-tar pitch product mostly is low-end product, and added value is low, and production high-quality coal-tar pitch product can make coal-tar pitch added value of product improve several times.At present, high-quality dipping agent bitumen production technique mainly contains following several: 1, filtering separation method; 2, centrifugal separation; 3, solvent extration.But it is reported, filtering separation method and centrifugal separation are for production high-quality coal-tar pitch product at present, and technology is immature, and the technical barrier of existence is not also resolved.Therefore now mostly be to adopt solvent extration for the production of the production technique of high-quality dipping agent bitumen, but its high-quality coal-tar pitch quality product of producing is poor, yield is not high yet.This is mainly because it can not remove the impurity in deasphalting effectively, thus restive pitch ash content.
Summary of the invention:
Technical problem to be solved by this invention is to provide a kind of high-quality dipping agent bitumen production technique.
For solving the problems of the technologies described above, the technical solution used in the present invention:
High-quality dipping agent bitumen production technique, is characterized in that: it comprises the following steps:
After being mixed with the first solvent kerosene and the second solvent washing oil line mixer, extraction sends into steel basin, feed coal pitch is sent in steel basin and stirred simultaneously, be pumped into the first subsider by oil pump, and the heavy phase part in the first subsider is pumped into through oil pump to quinoline insolubles is centrifugal to be removed in device, centrifugal removal quinoline insolubles slag, removes loopback of material after quinoline insolubles slag in the first subsider;
When the mixed solution storage capacity in the first subsider reaches after limit, can enter the second subsider by flowing full, leave standstill, in the second subsider, occur after layering, light phase component in the second subsider is pumped into the first vacuum still after the first process furnace heats and carry out underpressure distillation, desolvation obtains target product high-quality dipping agent bitumen.
Press such scheme, described extraction is 1:1.6～2 with the first solvent kerosene and the extraction mass ratio of the second solvent washing oil, and the mass ratio of described raw material and extraction solvent is 1:1.5～2.5.
Press such scheme, described quinoline insolubles is centrifugal remove device comprise ultracentrifuge and be connected with ultracentrifuge, for collecting the slag bucket of the quinoline insolubles slag removing.
Press such scheme, in described the second subsider, the time of repose of mixed solution is 6～8h.
Press such scheme, light phase component in described the second subsider is heated to 320～350 DEG C through the first process furnace, then send into the first vacuum still and carry out underpressure distillation, the underpressure distillation condition of the first vacuum still is: 20～60KPa(absolute pressure), column bottom temperature is at 300～320 DEG C.
Press such scheme, it is also included in the second subsider and occurs after layering, and the heavy phase component in the second subsider, after the second process furnace heats, is pumped into the second vacuum still and carries out underpressure distillation, and desolvation and heavy oil, obtain hard pitch.
Press such scheme, heavy phase component in described the second subsider is heated to 340～370 DEG C through the second process furnace, then send into the second vacuum still and carry out underpressure distillation, the underpressure distillation condition of the second vacuum still is: 20～60KPa(absolute pressure), 290 ± 5 DEG C of the tower temperature outs of heavy oil, column bottom temperature is at 320～340 DEG C.
Press such scheme, the solvent that the solvent that the second described vacuum still top removes and the first vacuum still top remove is sent into after cut groove is processed and is returned and join use after condenser condenses.
This high-quality dipping agent bitumen production technique is passed through solvent extration, standing sedimentation method and centrifugal separation organically combine, first will extract with solvent compounding in advance, then with raw material in steel basin after mixed dissolution, transfer in the first subsider, at the same time, the heavy phase part of natural subsidence in the first subsider is pumped into quinoline insolubles is centrifugal to be removed in device through the centrifugal quinoline insolubles slag that removes, then can be back to again in the first subsider, having solved independent raw material carries out the problem that centrifugation is very difficult on the one hand for this, on the other hand also due to the quinoline insolubles of having removed in advance in feed coal pitch, so compared with simple solvent extration, quality product also can be controlled well.After the mixed solution of the first subsider reaches limit, can enter in the second subsider by flowing full further, the low mid-boiling point component solution (hereinafter to be referred as light phase) obtaining in this extraction, except after desolventizing, obtains high-quality dipping agent bitumen through underpressure distillation., also can, by the heavy hydrocarbon component in the second subsider (hereinafter to be referred as heavy phase), remove at the bottom of tower through underpressure distillation meanwhile, produce byproduct hard pitch.Meanwhile, the lightweight solvent oil content that vacuum still steams also can be sent into after cut groove is processed and get back to steel basin after condenser condenses, returns and joins use.Particularly, select kerosene and washing oil to mix as extraction mixed solvent, its major cause is that coal-tar pitch is mainly aromatic series macromole ring-type component, and washing oil in mixed solvent is taking aromatic hydrocarbons as main, strong to coal-tar pitch dissolving power, but its density is large, and viscosity is high, be unfavorable for the settlement separate of quinoline insolubles (QI) particle.And main component in kerosene is various alkanes, poor with the intermiscibility of feed coal pitch, but its density is little, viscosity is low, and according to Stokes'theorem, it is conducive to the settlement separate of quinoline insolubles (QI) QI particle; Particularly utilize the poor characteristic of alkanes solubility property, can form the residue of q.s, these insoluble slags can be taken the tiny QI particle that is difficult in pitch remove together out of when settlement separate, thereby reach the object that thoroughly removes small QI particle.In addition, consider that washing oil is aromatic solvent, improve washing oil consumption, can improve the solvability of pitch, pitch solubility property improves, and refined asphaltic bitumen yield must increase.Finally comprehensively obtain by experiment: in the situation that two kinds of solvent quality of washing oil and kerosene are 1.5-2.5:1 than arrival 1.6-2:1, solvent and raw material ratio, refined asphaltic bitumen recovering effect the best.
Beneficial effect of the present invention:
Technique of the present invention is for the production of high-quality dipping agent bitumen, product yield high (can reach more than 60%), and product softening temperature is at 70～90 DEG C, and ash content can be controlled in 0.01～0.1%.
Brief description of the drawings
Fig. 1 is high-quality dipping agent bitumen production equipment schematic diagram in the embodiment of the present invention.In figure: 1-solvent trough, 2-steel basin, 3-line mixer, 4-the first subsider, 5-the second subsider, 6-slag bucket, 7-ultracentrifuge, 8-the first process furnace, 9-the first vacuum still, 10-the second vacuum still, 11-condenser, 12-the second process furnace, 13-the first oil pump, 14-the second oil pump, 15-the 3rd oil pump, 16-the 4th oil pump.
Embodiment
Embodiment 1
As shown in Figure 1: the production technique of high-quality dipping agent bitumen, it be by be stored in extraction the first solvent kerosene in solvent trough 1 and the second solvent washing oil in mass ratio the ratio line mixer 3 of 1:1.6 after mixing, send into steel basin 2, feed coal pitch is sent in steel basin and stirred simultaneously, the mass ratio of feed coal pitch and extraction solvent is 1:1.5, be pumped into the first subsider 4 by the first oil pump 13, and the heavy phase part in the first subsider is pumped into through the second oil pump 14 to quinoline insolubles is centrifugal to be removed in device, the centrifugal device that removes of described quinoline insolubles comprises ultracentrifuge 7 and the slag bucket 8 being connected with ultracentrifuge, by the centrifugal removal quinoline insolubles of ultracentrifuge slag, the quinoline insolubles slag removing is collected in slag bucket, remove loopback of material after quinoline insolubles slag in the first subsider,
When the mixed solution storage capacity in the first subsider reaches after limit, can enter the second subsider 5 by flowing full, leave standstill 6h, in the second subsider, occur after layering, light phase component in the second subsider is pumped into the first vacuum still 9 through the 3rd oil pump 15 after the first process furnace 8 is heated to 320 DEG C and carry out underpressure distillation, the underpressure distillation condition of the first vacuum still is: 20 KPa(absolute pressures), column bottom temperature is at 300 DEG C, and desolvation obtains target product high-quality dipping agent bitumen; Heavy phase component in the second subsider is pumped into the second vacuum still 10 through the 4th oil pump 16 after the second process furnace 12 is heated to 340 DEG C and carry out underpressure distillation, the underpressure distillation condition of the second vacuum still is: 20KPa(absolute pressure), 290 ± 5 DEG C of the tower temperature outs of heavy oil, column bottom temperature is at 320 DEG C, desolvation and heavy oil, obtain hard pitch; The solvent that the second described vacuum still and the first vacuum still top remove can be through condenser 11 condensations, then send into after cut groove is processed and return and join use.
Dipping agent bitumen product yield can reach more than 60%, and softening temperature is 85 DEG C of left and right, ash content 0.06% left and right.
Embodiment 2
The production technique of high-quality dipping agent bitumen, it be by be stored in extraction the first solvent kerosene in solvent trough 1 and the second solvent washing oil in mass ratio the ratio line mixer 3 of 1:2 after mixing, send into steel basin 2, feed coal pitch is sent in steel basin and stirred simultaneously, the mass ratio of feed coal pitch and extraction solvent is 1:2, be pumped into the first subsider 4 by the first oil pump 13, and the heavy phase part in the first subsider is pumped into through two oil pumps 14 to quinoline insolubles is centrifugal to be removed in device, the centrifugal device that removes of described quinoline insolubles comprises ultracentrifuge 7 and the slag bucket 8 being connected with ultracentrifuge, by the centrifugal removal quinoline insolubles of ultracentrifuge slag, the quinoline insolubles slag removing is collected in slag bucket, remove loopback of material after quinoline insolubles slag in the first subsider,
When the mixed solution storage capacity in the first subsider reaches after limit, can enter the second subsider 5 by flowing full, leave standstill 8h, in the second subsider, occur after layering, light phase component in the second subsider is pumped into the first vacuum still 9 through the 3rd oil pump 15 after the first process furnace 8 is heated to 340 DEG C and carry out underpressure distillation, the underpressure distillation condition of the first vacuum still is: 60KPa(absolute pressure), column bottom temperature is at 320 DEG C, and desolvation obtains target product high-quality dipping agent bitumen; Heavy phase component in the second subsider is heated to after 370 DEG C through the second process furnace 12, pump into the second vacuum still 10 through the 4th oil pump 16 and carry out underpressure distillation, underpressure distillation condition is: the underpressure distillation condition of the second vacuum still is: 60KPa(absolute pressure), 290 ± 5 DEG C of the tower temperature outs of heavy oil, column bottom temperature is at 340 DEG C, desolvation and heavy oil, obtain hard pitch.The solvent that the second described vacuum still and the first vacuum still top remove can be through condenser 11 condensations, then send into after cut groove is processed and return and join use.
Dipping agent bitumen product yield can reach more than 60%, and softening temperature is 90 DEG C of left and right, ash content 0.06% left and right.
Claims (6)
1. high-quality dipping agent bitumen production technique, it is characterized in that: it comprises the following steps: will after extraction the first solvent kerosene and the mixing of the second solvent washing oil line mixer, send into steel basin, feed coal pitch is sent in steel basin and stirred simultaneously, be pumped into the first subsider by oil pump, and the heavy phase part in the first subsider is pumped into through oil pump to quinoline insolubles is centrifugal to be removed in device, centrifugal removal quinoline insolubles slag, removes loopback of material after quinoline insolubles slag in the first subsider;
When the mixed solution storage capacity in the first subsider reaches after limit, can enter the second subsider by flowing full, leave standstill, in the second subsider, occur after layering, light phase component in the second subsider is pumped into the first vacuum still after the first process furnace heats and carry out underpressure distillation, desolvation obtains target product high-quality dipping agent bitumen, the centrifugal device that removes of described quinoline insolubles comprises ultracentrifuge and is connected with ultracentrifuge, for collecting the slag bucket of the quinoline insolubles slag removing, light phase component in described the second subsider is heated to 320～350 DEG C through the first process furnace, then send into the first vacuum still and carry out underpressure distillation, the underpressure distillation condition of the first vacuum still is: 20～60KPa(absolute pressure), column bottom temperature is at 300～320 DEG C.
2. high-quality dipping agent bitumen production technique according to claim 1, it is characterized in that: described extraction the first solvent kerosene and the extraction mass ratio of the second solvent washing oil are 1:1.6～2, and the mass ratio of described raw material and extraction solvent is 1:1.5～2.5.
3. high-quality dipping agent bitumen production technique according to claim 1, is characterized in that: in described the second subsider, the time of repose of mixed solution is 6～8h.
4. high-quality dipping agent bitumen production technique according to claim 1, it is characterized in that: it is also included in the second subsider and occurs after layering, by the heavy phase component in the second subsider after the second process furnace heats, pump into the second vacuum still and carry out underpressure distillation, desolvation and heavy oil, obtain hard pitch.
5. high-quality dipping agent bitumen production technique according to claim 4, it is characterized in that: the heavy phase component in described the second subsider is heated to 340～370 DEG C through the second process furnace, then send into the second vacuum still and carry out underpressure distillation, the underpressure distillation condition of the second vacuum still is: 20～60KPa(absolute pressure), 290 ± 5 DEG C of the tower temperature outs of heavy oil, column bottom temperature is at 320～340 DEG C.
6. high-quality dipping agent bitumen production technique according to claim 4, is characterized in that: the solvent that the solvent that the second described vacuum still top removes and the first vacuum still top remove is sent into after cut groove is processed and returned and join use after condenser condenses.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105754630A (en) * | 2016-03-25 | 2016-07-13 | 神华集团有限责任公司 | Preparation method of coal liquefied asphalt |
| CN107937010A (en) * | 2017-11-21 | 2018-04-20 | 七台河宝泰隆圣迈煤化工有限责任公司 | Densimetry instructs solvent extraction continuous sedimentation pitch pretreating process circulation solvent to return the method matched somebody with somebody |
| CN111218294B (en) * | 2018-11-27 | 2021-07-23 | 宝武炭材料科技有限公司 | Method for purifying quinoline insoluble coal-series asphalt with high softening point and high softening point |
| CN109518230B (en) * | 2019-01-21 | 2020-02-18 | 中南大学 | Impregnant for encrypted anode carbon block and preparation method thereof |
| CN111363577B (en) * | 2020-03-12 | 2021-09-21 | 中国科学院山西煤炭化学研究所 | Spinnable asphalt for coal-based general-grade asphalt carbon fibers and preparation method thereof |
| CN115197733B (en) * | 2022-06-29 | 2024-03-15 | 鞍钢化学科技有限公司 | Low QI impregnant asphalt preparation system and process |
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Effective date of registration: 20170717 Address after: 430083, Gate No. 2, Qingshan District, Hubei, Wuhan Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |
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