CN203079911U - Device for preparing coal based needle coke - Google Patents
Device for preparing coal based needle coke Download PDFInfo
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- CN203079911U CN203079911U CN 201320052772 CN201320052772U CN203079911U CN 203079911 U CN203079911 U CN 203079911U CN 201320052772 CN201320052772 CN 201320052772 CN 201320052772 U CN201320052772 U CN 201320052772U CN 203079911 U CN203079911 U CN 203079911U
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Abstract
The utility model discloses a device for preparing coal based needle coke. The device comprises a flash distillation tower, a heating furnace No.1 and a pressurizing hot filtration kettle, wherein the heating furnace No.1 and the pressurizing hot filtration kettle are respectively connected with the flash distillation tower; the heating furnace No.1 is respectively communicated with an asphalt refining and purifying groove and a polycondensation reaction kettle, and the pressurizing hot filtration kettle is sequentially communicated with a centrifuging machine and the asphalt refining and purifying groove; and the polycondensation reaction kettle is respectively communicated with a fractionating tower, a heating furnace No.2 and the asphalt refining and purifying groove, and the fractionating tower is communicated with the pressurizing hot filtration kettle to form a heavy component oil recycling loop; the heating furnace No.2 is communicated with a coking tower, and the top of the coking tower is communicated with the fractionating tower to form a coking oil gas loop; and the bottom of the coking tower is communicated with a calcining furnace. The device has the advantages that a raw material purification effect is good, and the content of quinoline insoluble (QI) in the refined and purified asphalt prepared after pretreatment of the raw materials is far less than that of the quinoline insoluble in asphalt prepared by other devices, and the coal based needle coke prepared by the device has low coefficient of thermal expansion, can meet the requirements on making ultra-high power electrodes and can be used for large-scale steel-making electric furnaces.
Description
Technical field
The utility model relates to the coking chemical technical field, specifically, relate to a kind of with coal tar, coal-tar pitch, return and join viscid bitumen or coal tar fraction is the device of feedstock production needle coke
Background technology
Along with Electric furnace steel making maximization and global Electric furnace steel making increase of production speed up, make ultra-high power graphite electrode (UHP) consumption increase fast, also more and more higher to the requirement of carbon raw materials.Needle coke is an aggregate of making ultra-high power graphite electrode, when adopting the Electric furnace steel making of ultra-high power graphite electrode, can make and shorten 30%～50% tap to tap time, and economize on electricity is more than 10%～50%, and economic benefit is very remarkable.It is two kinds of needle coke and coal-based needle cokes that needle coke can be divided into oil by the difference of its raw material, is raw material with petroleum residual oil and purified coal-tar pitch respectively, delayed coking, calcining and make, and its structure has tangible anisotropy stratiform structure.Because oil price is high and the lighting day by day of refining of petroleum, causing oil is that needle-shape coke raw material reduces, China is coke production big country simultaneously, has competent tar resource, a large amount of high quality raw material can be provided for the production of coal-based needle coke, therefore, the technology of preparing of coal-based needle coke also becomes the focus of industry research.
The production of needle coke is divided into 3 operations, i.e. raw materials pretreatment, delayed coking and calcining, and wherein raw materials pretreatment is as the primary operation of needle coke production, it is one of key problem in technology of producing needle coke, determining the quality of needle coke quality, for the coal-based needle coke raw material, pre-treatment is even more important.Except that containing impurity, also contain quinoline insolubles (QI) in the selected raw material of coal-based needle coke, in the needle coke Coking Process, quinoline insolubles can be attached to around the unstable mesophasespherule, hinder and spherularly further grow up and melt also, thereby can not generate the good needle coke of fibrous texture.Discover, when production is used to make the needle coke of ultra-high power graphite electrode, require quinoline insolubles in the material asphalt (QI) content less than 1%(less than 0.1% the best).
At present, the exemplary device for preparing coal-based needle coke both at home and abroad, the patent No. as shown in Figure 1 is the Chinese invention patent of ZL200610048177.4, major equipment comprises mixed solvent groove 101, refining plant 102, separation column 103, coking tower 104, pot furnace 105, raw material is modulated in mixed solvent groove 101, then in refining plant 102 through sedimentation, centrifugal, cross and filter out quinoline insolubles, the purification raw material that obtains carries out polycondensation in separation column 103, polycondensation asphalt advances coking tower 104 coking cokings, at last pyrogenic needle coke is put into pot furnace 105 calcinings and is formed finished product.Though this covering device operating procedure is simple, decontamination effect improving also can reach requirement, and shortcoming is that the treatment capacity of equipment is little, and solvent load is bigger, difficult solvent recovery, cost of investment height.
The utility model content
In order to overcome the deficiency that said apparatus exists, target of the present utility model is to provide a kind of device for preparing coal-based needle coke, adopt this device coal tar, coal-tar pitch, return and join raw materials such as viscid bitumen or coal tar fraction, filter and quinoline insolubles in the raw material is removed in centrifuging through flash distillation, pressurized heat, the purification raw material of producing carries out polycondensation in the round-robin mode in reactor, polycondensation asphalt heats laggard coking tower coking through process furnace, after calcining makes coal-based needle coke.
To achieve these goals, the utility model is achieved through the following technical solutions:
A kind of device for preparing coal-based needle coke comprises flashing tower, reaches the 1# process furnace and the pressurized heat filtration still that link to each other respectively with flashing tower; Described 1# process furnace is communicated with refining purifying pitch groove and batch condensation polymerization reactor respectively, and described pressurized heat filters still and is communicated with whizzer and refining purifying pitch groove successively; Described batch condensation polymerization reactor is communicated with separation column, 2# process furnace and refining purifying pitch groove respectively, and described separation column is communicated with pressurized heat and filters still formation heavy constituent oil reuse loop; Described 2# process furnace is communicated with coking tower, and the coking tower top is communicated with separation column and constitutes the coking oil gas loop; The coking tower bottom is communicated with calcining furnace.
Further, described 1# process furnace and 2# process furnace are vertical coil pipe cylindrical furnace, respectively there is a cover heating coil 1# heating furnace body upper and lower, links to each other by pipeline with the opening for feed of process furnace lower heating coil pipe at the discharge port of the feedstock pump of 1# process furnace arranged outside.
Further, described flashing tower is two 1# flashing towers that are connected in series and 2# flashing tower, and the sidewall of described 1# flashing tower and 1# process furnace discharge port join, and the bottom is provided with hard pitch extraction mouth; The top of described 2# flashing tower is provided with light oil extraction mouth, and the bottom is provided with the refined asphaltic bitumen material outlet, and the refined asphaltic bitumen material outlet connects interchanger by the heat filtering fresh feed pump and links to each other with pipeline and pressurized heat filtration still.
Further, it is vertical empty still that described pressurized heat filters still, and the bottom is a pyramidal structure, the still top is respectively equipped with rare gas element inlet mouth and rare gas element venting port, be provided with the filter material layer in the still, the kettle sidewall of close filter material layer is provided with the residue outlet of band tightness system, and autoclave body bottom is provided with filtrate outlet.
Further, described pressurized heat filters still and is made as two kettlies that are connected in parallel, and the feed(raw material)inlet on still top links to each other by the discharge port of the interchanger that the pipeline that has tee ball valve is connected with the heat filtering fresh feed pump.
Further, described filter material layer is located at heating and pressurizing and filters in the still cavity at the bottom of the tower to 1/6 place of cat head, and described filter material layer is layered on the stainless steel filtering net uniformly by solid particulate matter.
Further, the top of described batch condensation polymerization reactor is provided with the oil gas escape orifice, and escape orifice links to each other with the separation column opening for feed; The upper side wall of batch condensation polymerization reactor is provided with the outlet of polycondensation recycle stock, and the outlet of polycondensation recycle stock links to each other with the opening for feed made from extra care purifying pitch groove top; The batch condensation polymerization reactor bottom is provided with polycondensation refined asphaltic bitumen extraction mouth.
Further, the top of described separation column is provided with pneumatic outlet, and the middle part is provided with the light oil outlet, and the bottom is provided with the heavy oil outlet, and the bottom is provided with the heavy constituent oil export, and the heavy constituent oil export links to each other with the inlet duct that pressurized heat filters still by pipeline.
Further, described 2# process furnace is connected with batch condensation polymerization reactor by furnace charge pump and pipeline, is provided with steam entry on pipeline.
Further, described coking tower is made as two tower bodies that are connected in parallel, its top is provided with the coking oil gas escape orifice, the coking oil gas escape orifice at two coking tower tops links to each other with the opening for feed of separation column by three-way pipeline, the discharge port of coking tower bottom links to each other with the opening for feed of calcining furnace by pipeline, and the bottom of calcining furnace is provided with the needle coke outlet.
Compared with prior art, the beneficial effects of the utility model are: purification of raw materials is effective, the content of quinoline insolubles (QI) in the pitch that the content of quinoline insolubles (QI) makes much smaller than other devices in the refining purifying pitch that makes after the raw materials pretreatment, needle coke thermal expansivity with this device preparation is low, can satisfy the requirement of making ultra-high power graphite electrode, can be used for large-scale steel-smelting electric furnace.
Description of drawings
Fig. 1 is the exemplary device structural representation of the existing coal-based needle coke of preparation both at home and abroad.
Fig. 2 is a kind of apparatus structure synoptic diagram for preparing coal-based needle coke described in the utility model.
1-feedstock pump 2-1# process furnace 3-1# flashing tower 4-2# flashing tower 5-heat filtering fresh feed pump 6-pressurized heat filters the refining purifying pitch groove 9-polycondensation fresh feed pump 10-batch condensation polymerization reactor 11-separation column 12-furnace charge pump 13-2# process furnace 14-coking tower 15-calcining furnace of still 7-whizzer 8-among the figure.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further details.
As shown in Figure 2, the device of this preparation coal-based needle coke comprises two 1# flashing towers 3 that are connected in series and 2# flashing tower 4, after 1# process furnace 2 connects 1# flashing tower 3 and 2# flashing tower 4 successively, also, be communicated with refining purifying pitch groove 8 by polycondensation fresh feed pump 9 by pipe connection batch condensation polymerization reactor 10; 2# flashing tower 4 connects interchanger by heat filtering fresh feed pump 5 and pipeline is connected with two pressurized heats filtration stills 6 that are connected in parallel, and pressurized heat filters still 6 bottoms and is communicated with whizzer 7 and refining purifying pitch groove 8 successively; Batch condensation polymerization reactor 10 tops are communicated with separation column 11, and the bottom connects 2# process furnace 13 by furnace charge pump 12, and sidewall is communicated with refining purifying pitch groove 8; Separation column 11 is communicated with pressurized heat and filters still 6 formation heavy constituent oil reuse loops; 2# process furnace 13 is communicated with two coking towers that are connected in parallel 14, and coking tower 14 tops are communicated with separation column 11 and constitute the coking oil gas loop; Coking tower 14 bottoms are communicated with calcining furnace 15.
Wherein, 1# process furnace 2 is vertical coil pipe cylindrical furnace, one cover heating coil is respectively arranged at upper of furnace body and bottom, discharge port at the feedstock pump 1 of 1# process furnace 2 arranged outside links to each other by pipeline with the opening for feed of 1# process furnace 2 lower heating coil pipes, and the discharge port of 1# process furnace 2 lower heating coil pipes links to each other by the opening for feed of pipeline with 1# flashing tower 3 tops.
The bottom of 1# flashing tower 3 is provided with hard pitch extraction mouth, the flash oil outlet at top links to each other by pipeline with the opening for feed on 2# flashing tower 4 tops, 2# flashing tower 4 tops are provided with light oil extraction mouth, the bottom is provided with the refined asphaltic bitumen material outlet, and the refined asphaltic bitumen material outlet links to each other by pipeline with the opening for feed of heat filtering fresh feed pump 5.
The discharge port of heat filtering fresh feed pump 5 links to each other with the inlet of interchanger by pipeline, the outlet of interchanger links to each other by the feed(raw material)inlet that the pipeline pressurized heat identical with two that has tee ball valve filters still 6 tops, controls two pressurized heats by tee ball valve and filters still 6 alternate operations to realize continuous production.
It is vertical empty still that pressurized heat filters still 6, the bottom is a pyramidal structure, the still top is respectively equipped with rare gas element inlet mouth and rare gas element venting port, the rare gas element inlet mouth links to each other with the rare gas element gas cylinder by pipeline, the rare gas element venting port passes through tube emptying, on the pipeline of air inlet duct and venting port, all be provided with valve, inflation and venting that the control pressurized heat filters rare gas element in the still 6.Be provided with the filter material layer in the still, the kettle sidewall of close filter material layer is provided with the residue outlet of band tightness system, and autoclave body bottom is provided with filtrate outlet.Pressurized heat filters still 6 inside and is provided with filter material, and described filter material layer is located at heating and pressurizing and filters in still 6 cavitys at the bottom of the tower to 1/6 place of cat head, and the filter material layer is layered on the stainless steel filtering net uniformly by solid particulate matter.The middle part that pressurized heat filters still 6 is provided with the residue outlet of being with tightness system, is used for the replacing of filter material and the removing of filter residue.The bottom that pressurized heat filters still 6 is provided with filtrate outlet, and the filtrate outlet of two pressurized heat filtration still 6 bottoms links to each other by the opening for feed of three-way pipeline with whizzer 7.
Whizzer 7 is a link-suspended basket centrifuge, the bottom is provided with sludge discharge tube, the discharge port of whizzer 7 links to each other by pipeline with the opening for feed of refining purifying pitch groove 8, the discharge port that is positioned at refining purifying pitch groove 8 bottoms links to each other by the opening for feed of pipeline with polycondensation fresh feed pump 9, the discharge port of poly-fresh feed pump 9 links to each other by the opening for feed of pipeline with 1# process furnace 2 top heating coils, and the discharge port of 1# process furnace 2 top heating coils links to each other by pipeline with the opening for feed of batch condensation polymerization reactor 10.
The top of batch condensation polymerization reactor 10 is provided with the oil gas escape orifice, and escape orifice links to each other by pipeline with the opening for feed of separation column 11, and the upper side wall of batch condensation polymerization reactor is provided with the outlet of polycondensation recycle stock, and the outlet of polycondensation recycle stock links to each other with the opening for feed made from extra care purifying pitch groove top; The batch condensation polymerization reactor bottom is provided with polycondensation refined asphaltic bitumen extraction mouth, and polycondensation refined asphaltic bitumen extraction mouth links to each other by the opening for feed of pipeline with furnace charge pump 12.
Separation column 11 tops are provided with pneumatic outlet, and the middle part is provided with the light oil outlet, and the bottom is provided with the heavy oil outlet, and the bottom is provided with the heavy constituent oil export, and the heavy constituent oil export links to each other with the inlet duct that pressurized heat filters still 6 by pipeline.
2# process furnace 13 is connected with batch condensation polymerization reactor 10 by furnace charge pump 12 and pipeline, is provided with steam entry on pipeline, is provided with valve on the steam entry pipeline, the add-on of control water vapour.2# process furnace 13 is vertical coil pipe cylindrical furnaces, and the discharge port of 2# process furnace 13 links to each other with the bottom feed mouth of two coking towers 14 by the pipeline that has tee ball valve, controls two coking tower 14 alternate operations to realize continuous production by tee ball valve.
Coking tower 14 tops are provided with the coking oil gas escape orifice, the coking oil gas escape orifice links to each other with the opening for feed pipeline of separation column 11 by three-way pipeline, the discharge port of coking tower 14 bottoms links to each other by the opening for feed of pipeline with calcining furnace 15, and the bottom of calcining furnace 15 is provided with the needle coke outlet.
When adopting the utility model to carry out the preparation of coal-based needle coke, raw material enters 1# flashing tower 3 and carries out flash distillation after 2 heating of 1# process furnace, the flash oil that cat head is overflowed enters 2# flashing tower 4 and carries out flash distillation once more, the refined asphaltic bitumen raw material that obtains enters pressurized heat filtration still 6 and carries out heat filtering, filtrate enters whizzer 7 and carries out centrifuging, the refining purifying pitch that obtains carries out polycondensation in the round-robin mode in batch condensation polymerization reactor 10, the polycondensation refined asphaltic bitumen of extraction enters coking tower 14 coking, and the green coke that makes high-temperature calcination in calcining furnace 15 obtains the product needle coke.
Above content is to further describing that the utility model is done in conjunction with concrete preferred implementation; can not assert that embodiment of the present utility model only limits to this; for the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design; can also make some simple deduction or replace, all should be considered as belonging to the utility model and determine scope of patent protection by claims of being submitted to.
Claims (10)
1. a device for preparing coal-based needle coke is characterized in that, comprises flashing tower, reaches the 1# process furnace (2) and the pressurized heat filtration still (6) that link to each other respectively with flashing tower; Described 1# process furnace (2) is communicated with refining purifying pitch groove (8) and batch condensation polymerization reactor (10) respectively, and described pressurized heat filters still (6) and is communicated with whizzer (7) and refining purifying pitch groove (8) successively; Described batch condensation polymerization reactor (10) is communicated with separation column (11), 2# process furnace (13) and refining purifying pitch groove (8) respectively, and described separation column (11) is communicated with pressurized heat and filters still (6) formation heavy constituent oil reuse loop; Described 2# process furnace (13) is communicated with coking tower (14), and coking tower (14) top is communicated with separation column (11) and constitutes the coking oil gas loop; Coking tower (14) bottom is communicated with calcining furnace (15).
2. the device of preparation coal-based needle coke according to claim 1 is characterized in that, described 1# process furnace (2) and 2# process furnace (13) are vertical coil pipe cylindrical furnace; One cover heating coil is respectively arranged at 1# process furnace (2) upper of furnace body and bottom, links to each other by pipeline with the opening for feed of process furnace (2) lower heating coil pipe at the discharge port of the feedstock pump (1) of 1# process furnace (2) arranged outside.
3. the device of preparation coal-based needle coke according to claim 1, it is characterized in that, described flashing tower is two 1# flashing towers (3) that are connected in series and 2# flashing tower (4), the sidewall of described 1# flashing tower (3) and 1# process furnace (2) discharge port join, and the bottom is provided with hard pitch extraction mouth; The top of described 2# flashing tower (4) is provided with light oil extraction mouth, and the bottom is provided with the refined asphaltic bitumen material outlet, and the refined asphaltic bitumen material outlet connects interchanger by heat filtering fresh feed pump (5) and links to each other with pipeline and pressurized heat filtration still (6).
4. the device of preparation coal-based needle coke according to claim 1, it is characterized in that, it is vertical empty still that described pressurized heat filters still (6), the bottom is a pyramidal structure, the still top is respectively equipped with rare gas element inlet mouth and rare gas element venting port, be provided with the filter material layer in the still, the kettle sidewall of close filter material layer is provided with the residue outlet of band tightness system, and autoclave body bottom is provided with filtrate outlet.
5. the device of preparation coal-based needle coke according to claim 4, it is characterized in that, described pressurized heat filters still (6) and is made as two kettlies that are connected in parallel, and the feed(raw material)inlet on still top links to each other by the discharge port of the interchanger that the pipeline that has tee ball valve is connected with heat filtering fresh feed pump (5).
6. the device of preparation coal-based needle coke according to claim 4 is characterized in that, described filter material layer is located at heating and pressurizing and filters in still (6) cavity at the bottom of the tower to 1/6 place of cat head, and described filter material layer is layered on the stainless steel filtering net uniformly by solid particulate matter.
7. the device of preparation coal-based needle coke according to claim 1 is characterized in that, the top of described batch condensation polymerization reactor (10) is provided with the oil gas escape orifice, and escape orifice links to each other with separation column (11) opening for feed; The upper side wall of batch condensation polymerization reactor (10) is provided with the outlet of polycondensation recycle stock, and the outlet of polycondensation recycle stock links to each other with the opening for feed made from extra care purifying pitch groove (8) top; Batch condensation polymerization reactor (10) bottom is provided with polycondensation refined asphaltic bitumen extraction mouth.
8. the device of preparation coal-based needle coke according to claim 1, it is characterized in that, the top of described separation column (11) is provided with pneumatic outlet, the middle part is provided with the light oil outlet, the bottom is provided with the heavy oil outlet, the bottom is provided with the heavy constituent oil export, and the heavy constituent oil export links to each other with the inlet duct that pressurized heat filters still (6) by pipeline.
9. the device of preparation coal-based needle coke according to claim 1 is characterized in that, described 2# process furnace (13) is connected with batch condensation polymerization reactor (10) by furnace charge pump (12) and pipeline, is provided with steam entry on pipeline.
10. the device of preparation coal-based needle coke according to claim 1, it is characterized in that, described coking tower (14) is made as two tower bodies that are connected in parallel, its top is provided with the coking oil gas escape orifice, the coking oil gas escape orifice at two coking towers (14) top links to each other by the opening for feed of three-way pipeline with separation column (11), the discharge port of coking tower (14) bottom links to each other by the opening for feed of pipeline with calcining furnace (15), and the bottom of calcining furnace (15) is provided with the needle coke outlet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320052772 CN203079911U (en) | 2013-01-30 | 2013-01-30 | Device for preparing coal based needle coke |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320052772 CN203079911U (en) | 2013-01-30 | 2013-01-30 | Device for preparing coal based needle coke |
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| CN203079911U true CN203079911U (en) | 2013-07-24 |
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| CN 201320052772 Expired - Lifetime CN203079911U (en) | 2013-01-30 | 2013-01-30 | Device for preparing coal based needle coke |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109370642A (en) * | 2018-11-19 | 2019-02-22 | 山西中科化美科技有限责任公司 | A kind of delay coking process being used to prepare coal-based needle coke |
| CN110066675A (en) * | 2019-04-24 | 2019-07-30 | 中国石油大学(华东) | A kind of method of the high-quality needle coke of continuous production |
| CN110066676A (en) * | 2019-04-24 | 2019-07-30 | 中国石油大学(华东) | A kind of continuous processing producing high-quality needle coke |
| RU2805662C1 (en) * | 2022-08-17 | 2023-10-23 | Акционерное общество "Газпромнефть - Омский НПЗ" (АО "Газпромнефть-ОНПЗ") | Method and plant for producing petroleum needle coke by delayed coking |
-
2013
- 2013-01-30 CN CN 201320052772 patent/CN203079911U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109370642A (en) * | 2018-11-19 | 2019-02-22 | 山西中科化美科技有限责任公司 | A kind of delay coking process being used to prepare coal-based needle coke |
| CN110066675A (en) * | 2019-04-24 | 2019-07-30 | 中国石油大学(华东) | A kind of method of the high-quality needle coke of continuous production |
| CN110066676A (en) * | 2019-04-24 | 2019-07-30 | 中国石油大学(华东) | A kind of continuous processing producing high-quality needle coke |
| RU2805662C1 (en) * | 2022-08-17 | 2023-10-23 | Акционерное общество "Газпромнефть - Омский НПЗ" (АО "Газпромнефть-ОНПЗ") | Method and plant for producing petroleum needle coke by delayed coking |
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Granted publication date: 20130724 |