CN108285802A - Asphaltene precipitation heavy phase system injects the method that carbolineum extends the system operation period - Google Patents
Asphaltene precipitation heavy phase system injects the method that carbolineum extends the system operation period Download PDFInfo
- Publication number
- CN108285802A CN108285802A CN201810162668.4A CN201810162668A CN108285802A CN 108285802 A CN108285802 A CN 108285802A CN 201810162668 A CN201810162668 A CN 201810162668A CN 108285802 A CN108285802 A CN 108285802A
- Authority
- CN
- China
- Prior art keywords
- heavy phase
- carbolineum
- settling tank
- extends
- operation period
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000001556 precipitation Methods 0.000 title claims abstract description 17
- 238000004062 sedimentation Methods 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000012046 mixed solvent Substances 0.000 claims description 17
- 238000000605 extraction Methods 0.000 claims description 15
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 10
- 238000004821 distillation Methods 0.000 claims description 9
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000004939 coking Methods 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- 239000010426 asphalt Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000011295 pitch Substances 0.000 description 10
- 239000011331 needle coke Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 239000011311 coal-based needle coke Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011294 coal tar pitch Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/06—Working-up pitch, asphalt, bitumen by distillation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
Abstract
The present invention provides the methods that asphaltene precipitation heavy phase system injection carbolineum extends the system operation period, this method is that the carbolineum for producing heavy phase destilling tower flows back into settling tank heavy phase system, heavy phase to settling pot bottom is diluted, to extend the cycle of operation of settling tank.The present invention extends the cycle of operation of settling tank, and in previous production, the cycle of operation of single settling tank is most 7 days short, no longer than 3 months, can significantly extend the cycle of operation of settling tank by this invention.Improve the yield of light phase refined bitumen, in previous production, the yield of refined bitumen is in 70% highest 75%, this invention carbolineum returns the bottom of settling tank, carbolineum component can dilute dissolving heavy phase deposit by the similar principle to mix, make sedimentation pot bottom that stifled probability occur to reduce, the yield that can improve light phase refined bitumen in this case reaches 80% or more.
Description
Technical field
The present invention relates to coal-based needle coke technical field more particularly to it is a kind of to coal tar pitch sedimentation heavy phase system inject carbolineum
Extend the method for the settling tank cycle of operation.
Background technology
Needle coke is the primary raw material for producing ultra high power graphite electrode and high power graphite electrode, made of needle coke
Graphite electrode has the current density that thermal shock resistance is strong, high mechanical strength, oxidation susceptibility are good, electrical consumption is low and allows big
The advantages that, therefore the market demand is huge.The needle coke produced at present can be divided into petroleum needle according to it using the difference of raw material
Shape coke and coal-based needle coke two major classes.
The production process of coal-based needle coke is broadly divided into pretreatment of raw material, delayed coking and calcining.Wherein pretreatment of raw material
Primary process as needle coke production, it is therefore an objective to remove the quinoline insolubles (QI) in material asphalt, be production needle coke
One of key technology decides the quality of needle coke quality, and for coal-based needle coke raw material, pretreating process technology is closed the most
Key.
Settling tank is the core equipment of pretreatment unit, in infall process in the mixed solvent aliphatic hydrocarbon in material asphalt
Macromolecular occurs flocculation and settles downwards, and the QI in material asphalt is all gathered in heavy phase, is discharged for ease of heavy phase
The lower part of settling tank is designed as back taper.After continuously running for a long time, heavy phase deposit is easy heavy pretreatment unit
It drops and is accumulated at the tank skin and outlet at bottom of tank, cause heavy phase discharge gate to block, when there is such case, it is necessary to switch
The position that settling tank or shutdown process block.
Invention content
The object of the present invention is to provide a kind of asphaltene precipitation heavy phase systems to inject the method that carbolineum extends the system operation period,
By the way of injecting carbolineum to settling tank heavy phase system, by the similar principle to mix, carbolineum dissolved dilution heavy phase system is allowed
Deposit make heavy phase system become to dilute, to extend the cycle of operation of settling tank, while the yield of refined bitumen can be made
It is increased to 80% or more.
To achieve the above object, the present invention is realized using following technical scheme：
Asphaltene precipitation heavy phase system injects the method that carbolineum extends the system operation period, and this method is to adopt heavy phase destilling tower
The carbolineum gone out flows back into settling tank heavy phase system, and the heavy phase to settling pot bottom is diluted, to extend the fortune of settling tank
The row period.
The pitch is coal measures maltha, 30-40 DEG C of softening point, quinoline insolubles≤3wt%, toluene insolubles 10-
15wt%, coking value ＞ 35wt%；The method that carbolineum is injected to sedimentation heavy phase system includes the following steps：
1) it enters in settling tank and settles after mixing pitch with mixed solvent；
2) the miscella pumped in heavy phase system will be settled, enters in heavy phase destilling tower by heavy phase heating furnace and carries out
Distillation；
3) the carbolineum pump that heavy phase destilling tower produces is returned in settling tank heavy phase system；
The mixed solvent is fat aromatic hydrocarbons and aromatic hydrocarbon by weight (1-1.5):The 1 mixed solvent of ratio uniform；
The pitch is with mixed solvent by weight (0.9-1.2):It is entered in settling tank after 1 ratio mixing.
Above-mentioned steps 1) in settling tank temperature control at 130~140 DEG C.
Above-mentioned steps 2) in heavy phase miscella entered after heavy phase heating furnace is warming up to 300~350 DEG C heavy phase distillation
Tower.
Above-mentioned steps 2) in miscella distillation under pressure, the vacuum degree control of heavy phase destilling tower are carried out in heavy phase destilling tower
It is controlled at 100~150 DEG C in the temperature of -0.07~-0.09Mpa, heavy phase overhead.
Above-mentioned steps 3) in carbolineum produce temperature be 220-250 DEG C.
Above-mentioned steps 3) in carbolineum enter settling tank flow be 1-1.5t/h.
The device that the method in asphaltene precipitation heavy phase system injection carbolineum extension system operation period uses, including settling tank,
Heavy phase heating furnace, heavy phase destilling tower, carbolineum extraction pump, heavy phase oil feed pump, the sedimentation pot bottom heavy phase oil outlet pass through
Heavy phase oil feed pump connects heavy phase heating furnace, the entrance of the outlet connection heavy phase destilling tower of the heavy phase heating furnace, the heavy phase
The carbolineum extraction mouth of destilling tower produces pump connection sedimentation pot bottom by carbolineum.
The pipeline of the carbolineum extraction pump connection settling tank is divided into two-way from tangential direction one on the other in sedimentation pot bottom
Each lead into settling tank.
Compared with prior art, the beneficial effects of the invention are as follows：
1) extend the cycle of operation of settling tank, in previous production, the cycle of operation of single settling tank is most 7 days short, most
The cycle of operation of settling tank can significantly be extended by this invention by the long no more than 3 moon.
2) yield for improving light phase refined bitumen, in previous production, the yield of refined bitumen in 70% highest 75%,
If the yield of the refined bitumen excessively high sedimentation time that can shorten pitch just must to ensure that the QI of refined bitumen is removed completely
The setting condition that material asphalt must be increased can accelerate sedimentation pot bottom and block in this way.This invention carbolineum returns sedimentation
The bottom of tank, carbolineum component can dilute dissolving heavy phase deposit by the similar principle to mix, so that sedimentation pot bottom is occurred stifled
Probability reduce, the yield that can improve light phase refined bitumen in this case reaches 80% or more.
Description of the drawings
Fig. 1 is the process diagram of the present invention.
Fig. 2 is the connection diagram of carbolineum return line and settling tank.
Fig. 3 is the vertical view that carbolineum return line tangentially enters settling tank.
In figure：1- settling tanks；2- heavy phase heating furnaces；3- heavy phase destilling towers；4- carbolineums extraction pump；5- heavy phase oil feed pumps；
The upper return lines of 6-；Return line under 7-.
Specific implementation mode
The present invention is described in detail below in conjunction with the accompanying drawings, it should be noted that the present invention implementation be not limited to it is following
Embodiment.
See that Fig. 1-Fig. 3, asphaltene precipitation heavy phase system inject the method that carbolineum extends the system operation period, this method is will to weigh
The carbolineum that phase destilling tower 3 produces flows back into 1 heavy phase system of settling tank, is diluted to the heavy phase of 1 bottom of settling tank, to prolong
The cycle of operation of long settling tank 1.
The pitch is coal measures maltha, 30-40 DEG C of softening point, quinoline insolubles≤3wt%, toluene insolubles 10-
15wt%, coking value ＞ 35wt%；The method that carbolineum is injected to sedimentation heavy phase system includes the following steps：
1) it enters in settling tank 1 and settles after mixing pitch with mixed solvent；
2) the miscella pumped in heavy phase system will be settled, by heavy phase heating furnace 2 enter in heavy phase destilling tower 3 into
Row distillation；
3) the carbolineum pump that heavy phase destilling tower 3 produces is returned in 1 heavy phase system of settling tank；
The mixed solvent is fat aromatic hydrocarbons and aromatic hydrocarbon by weight (1-1.5):The 1 mixed solvent of ratio uniform；
The pitch is with mixed solvent by weight (0.9-1.2):It is entered in settling tank 1 after 1 ratio mixing.
Above-mentioned steps 1) in settling tank 1 temperature control at 130~140 DEG C.
Above-mentioned steps 2) in heavy phase miscella entered after heavy phase heating furnace 2 is warming up to 300~350 DEG C heavy phase distillation
Tower 3.
Above-mentioned steps 2) in miscella distillation under pressure, the vacuum degree control of heavy phase destilling tower 3 are carried out in the heavy phase destilling tower 3
It is controlled at 100~150 DEG C in the temperature of -0.07~-0.09Mpa, 3 tower top of heavy phase destilling tower.
Above-mentioned steps 3) in carbolineum produce temperature be 220-250 DEG C.
Above-mentioned steps 3) in carbolineum enter settling tank 1 flow be 1-1.5t/h.
The device that the method in asphaltene precipitation heavy phase system injection carbolineum extension system operation period uses, including settling tank 1,
Heavy phase heating furnace 2, heavy phase destilling tower 3, carbolineum extraction pump 4, heavy phase oil feed pump 5,1 bottom heavy phase oil outlet of the settling tank
Heavy phase heating furnace 2 is connected by heavy phase oil feed pump 5, the outlet of the heavy phase heating furnace 2 connects the entrance of heavy phase destilling tower 3,
The carbolineum extraction mouth of the heavy phase destilling tower 3 passes through 41 bottom of connection settling tank of carbolineum extraction pump.
The pipelines of 4 connection settling tanks 1 of carbolineum extraction pump are divided into two-way from tangential one on the other in 1 bottom of settling tank
Direction each leads into settling tank 1.See that Fig. 2, upper return line 6 are connected to the reverse taper portion of 1 lower part of settling tank, lower return line 7
It is connected to the straight drum part of 1 lower part back taper outlet at bottom of settling tank.Upper return line 6 and lower return line 7 are respectively from tangent line side
To settling tank 1 is passed through, can make 1 bottom of settling tank heavy phase system formed two layers vortex, make reflux carbolineum can be good at
Heavy phase phased soln.
Embodiment 1：
The method that carbolineum is injected to sedimentation heavy phase system includes the following steps：
1) it enters in settling tank 1 and settles after mixing pitch with mixed solvent.
Pitch is coal measures maltha, 30-40 DEG C of softening point, quinoline insolubles≤3wt%, toluene insolubles 10-
15wt%, coking value ＞ 35wt%.Mixed solvent is fat aromatic hydrocarbons and aromatic hydrocarbon by weight 1.5：1 ratio uniform is mixed
Solvent；Pitch and mixed solvent in mass ratio 1.2:It is entered in settling tank 1 after 1 ratio mixing.The temperature of settling tank 1 controls
At 130~140 DEG C.
2) the miscella heavy phase oil feed pump 5 settled in heavy phase system is extracted out, enters heavy phase by heavy phase heating furnace 2
It is distilled in destilling tower 3.
Heavy phase miscella enters heavy phase destilling tower 3 after heavy phase heating furnace 2 is warming up to 300~350 DEG C.Miscella exists
Distillation under pressure is carried out in heavy phase destilling tower 3, the vacuum degree control of heavy phase destilling tower 3 is in -0.07~-0.09Mpa, heavy phase destilling tower
The temperature of 3 tower tops is controlled at 100~150 DEG C.
3) the carbolineum carbolineum extraction pump 4 that heavy phase destilling tower 3 produces is returned in 1 heavy phase system of settling tank.
Carbolineum is produced at 15 layers of tower tray of heavy phase destilling tower, the temperature of carbolineum extraction is 240 DEG C.Carbolineum enters settling tank 1
Flow be 1t/h.
Claims (10)
1. asphaltene precipitation heavy phase system injects the method that carbolineum extends the system operation period, which is characterized in that this method is will to weigh
The carbolineum of phase destilling tower extraction flows back into settling tank heavy phase system, and the heavy phase to settling pot bottom is diluted, to extend
The cycle of operation of settling tank.
2. the method that asphaltene precipitation heavy phase system injection carbolineum according to claim 1 extends the system operation period, special
Sign is that the pitch is coal measures maltha, 30-40 DEG C of softening point, quinoline insolubles≤3wt%, toluene insolubles 10-
15wt%, coking value ＞ 35wt%；The method that carbolineum is injected to sedimentation heavy phase system includes the following steps：
1) it enters in settling tank and settles after mixing pitch with mixed solvent；
2) the miscella pumped in heavy phase system will be settled, enters in heavy phase destilling tower by heavy phase heating furnace and is steamed
It evaporates；
3) the carbolineum pump that heavy phase destilling tower produces is returned in settling tank heavy phase system.
3. the method that asphaltene precipitation heavy phase system injection carbolineum according to claim 2 extends the system operation period, special
Sign is that the mixed solvent is fat aromatic hydrocarbons and aromatic hydrocarbon by weight (1-1.5):The 1 mixed solvent of ratio uniform；Institute
Pitch is stated with mixed solvent by weight (0.9-1.2):It is entered in settling tank after 1 ratio mixing.
4. the method that asphaltene precipitation heavy phase system injection carbolineum according to claim 2 extends the system operation period, special
Sign is, above-mentioned steps 1) in the temperature of settling tank control at 130~140 DEG C.
5. the method that asphaltene precipitation heavy phase system injection carbolineum according to claim 2 extends the system operation period, special
Sign is, above-mentioned steps 2) in heavy phase miscella heavy phase distillation is entered after heavy phase heating furnace is warming up to 300~350 DEG C
Tower.
6. the method that asphaltene precipitation heavy phase system injection carbolineum according to claim 2 extends the system operation period, special
Sign is, above-mentioned steps 2) in miscella carry out distillation under pressure in heavy phase destilling tower, the vacuum degree control of heavy phase destilling tower-
The temperature of 0.07~-0.09Mpa, heavy phase overhead are controlled at 100~150 DEG C.
7. the method that asphaltene precipitation heavy phase system injection carbolineum according to claim 2 extends the system operation period, special
Sign is, above-mentioned steps 3) in the temperature that produces of carbolineum be 220-250 DEG C.
8. the method that asphaltene precipitation heavy phase system injection carbolineum according to claim 2 extends the system operation period, special
Sign is, above-mentioned steps 3) in carbolineum to enter the flow of settling tank be 1-1.5t/h.
9. claim 1-8 its any one of as described in asphaltene precipitation heavy phase system injection carbolineum extend the system operation period
Method use device, it is characterised in that：Including settling tank, heavy phase heating furnace, heavy phase destilling tower, carbolineum extraction pump, heavy phase
Oily feed pump, the sedimentation pot bottom heavy phase oil outlet connect heavy phase heating furnace by heavy phase oil feed pump, and the heavy phase adds
The carbolineum extraction mouth of the entrance of the outlet connection heavy phase destilling tower of hot stove, the heavy phase destilling tower is heavy by carbolineum extraction pump connection
Pot bottom drops.
10. device according to claim 9, which is characterized in that the pipeline of the carbolineum extraction pump connection settling tank, heavy
Drop pot bottom is divided into two-way and each leads into settling tank from tangential direction one on the other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162668.4A CN108285802A (en) | 2018-02-26 | 2018-02-26 | Asphaltene precipitation heavy phase system injects the method that carbolineum extends the system operation period |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162668.4A CN108285802A (en) | 2018-02-26 | 2018-02-26 | Asphaltene precipitation heavy phase system injects the method that carbolineum extends the system operation period |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108285802A true CN108285802A (en) | 2018-07-17 |
Family
ID=62832959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810162668.4A Pending CN108285802A (en) | 2018-02-26 | 2018-02-26 | Asphaltene precipitation heavy phase system injects the method that carbolineum extends the system operation period |
Country Status (1)
| Country | Link |
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| CN (1) | CN108285802A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114806620A (en) * | 2021-12-29 | 2022-07-29 | 宁夏百川新材料有限公司 | Pretreatment process for coal-based needle coke preparation raw material |
| CN115216324A (en) * | 2022-06-29 | 2022-10-21 | 鞍钢化学科技有限公司 | System and method for prolonging operation period of coal-based needle coke pretreatment settling tank |
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2018
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114806620A (en) * | 2021-12-29 | 2022-07-29 | 宁夏百川新材料有限公司 | Pretreatment process for coal-based needle coke preparation raw material |
| CN114806620B (en) * | 2021-12-29 | 2024-04-09 | 宁夏百川新材料有限公司 | Pretreatment process for preparing raw materials from coal-based needle coke |
| CN115216324A (en) * | 2022-06-29 | 2022-10-21 | 鞍钢化学科技有限公司 | System and method for prolonging operation period of coal-based needle coke pretreatment settling tank |
| CN115216324B (en) * | 2022-06-29 | 2023-12-08 | 鞍钢化学科技有限公司 | System and method for prolonging operation period of coal-based needle coke pretreatment settling tank |
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