CN104962314B - Slurry oil produces the system and method for needle-shape coke raw material - Google Patents

Slurry oil produces the system and method for needle-shape coke raw material Download PDF

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CN104962314B
CN104962314B CN201510340928.9A CN201510340928A CN104962314B CN 104962314 B CN104962314 B CN 104962314B CN 201510340928 A CN201510340928 A CN 201510340928A CN 104962314 B CN104962314 B CN 104962314B
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solid
unit
electrostatic
needle
vacuum distillation
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CN201510340928.9A
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CN104962314A (en
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马利亭
马红岩
李运田
庄建军
李普军
翟海波
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山东菏泽德泰化工有限公司
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Abstract

The invention discloses the system that a kind of slurry oil produces needle-shape coke raw material, the system includes:Vacuum distillation unit, electrostatic solid-liquid separation unit, extraction unit;Wherein, the vacuum distillation unit is connected by pipeline with the electrostatic solid-liquid separation unit;The extraction unit is connected by pipeline with the electrostatic solid-liquid separation unit or the vacuum distillation unit.The present invention removes solia particle by " vacuum distillation+electrostatic point solid-liquid is from device " process combination, the active principle of production needle-shape coke raw material is obtained by " vacuum distillation+extracting " process combination, the catalyst particles in slurry oil can effectively be removed, particularly less than 5 microns tiny catalyst particles, make the solid concentration after processing reach below 10ppm.

Description

Slurry oil produces the system and method for needle-shape coke raw material

Technical field

Needle-shape coke raw material is produced the present invention relates to petrochemical industry, carbon material technical field, more particularly to a kind of slurry oil System and method.

Background technology

Needle coke is a fine quality in carbon material, is production high power and smelting steel in ultrahigh-power electric furnace graphite The primary raw material of electrode, its graphitization product is widely used in electric furnace steel making electrode, nuclear reactor decelerating material and rocketry.Root According to the difference of raw materials for production, needle coke can be divided into two kinds of oil system needle coke and coal-based needle coke.Given birth to by raw material of petroleum heavy oil The needle coke of production for oil be, using coal tar asphalt and its cut be raw material production needle coke as coal measures.

The problem of production needle coke most critical is the selection and pretreatment of raw material.Produce the ingredient requirement short-side chain of needle coke Polycyclic aromatic hydrocarbon content is high, colloidal bitumen content is low.Catalytic slurry is rich in short-side chain condensed-nuclei aromatics, can pass through certain handling process Remove its undesirable components, thus meet production needle coke component requirements, be oil be needle coke main good raw material.

Catalytic slurry usually contains a certain amount of solid particle, and concentration generally in 1000~3500ppm or so, is predominantly urged Agent fine powder and a certain amount of coke powder, have a strong impact on the utilization scope of slurry oil.Solia particle in raw material almost 100% is trapped in In needle coke product, the ash content of needle coke is directly affected.Solia particle content can also influence mesophasespherule formation and into It is long, the quality of final influence needle coke.The high slurry oil of solia particle content can only be used as solid phase in the raw material of mill run, slurry oil Content<During 100ppm, it can be used to produce needle coke, therefore, the solid particle removed in catalytic cracked oil pulp is very necessary.

The average grain diameter of contained catalyst is about at 10-20 μm in slurry oil, wherein about 20% is less than 5 μm of fine particles. The conventional sedimentation of current industrial production and filter, it is impossible to a large amount of continuously to remove below these fine particles, particularly 5 μm Fine particles be even more to be difficult to remove.Filtration method is needed and the equal fine and closely woven screen cloth of particle in theory, it is easy to blocked.Electrostatic Formula solid-liquid separator, the easier absorption of tiny particulate, can make the solid concentration after processing reach below 10ppm, even more It is low.

Existing catalytic slurry processing system, is the combined system using " vacuum distillation+extracting ", its method is using extracting The group technology of+vacuum distillation, purifies slurry oil, produces needle-shape coke raw material.Slurry oil removes asphalitine by vacuum distillation apparatus After partial catalyst, aromatic component is extracted, the raw material of production needle coke is used as.

Needle-shape coke raw material solid content after existing slurry oil refining system processing is unstable, can influence needle coke in follow-up system The quality index such as the intensity of product, underproof raw material can only do over again or degrade processing as mill run raw material.So, it is Ensure the qualified needle-shape coke raw material of production department, can only select the low slurry oil of solid content during buying raw material slurry oil, solid concentration is referred to Mark requires tighter, limits the source of raw material slurry oil, so as to add production cost, has influence on the economic benefit of enterprise.

It is particles contained average about at 10-20 microns in slurry oil, wherein about 20% is less than 5 microns of fine particle;Using Traditional filtering type equipment largely can not continuously remove these particulates, existing slurry oil pretreatment system can remove in operation compared with Big particle size of catalyst particulate, but can not effectively remove less than 5 microns tiny catalyst particles.Colloid especially, in slurry oil, Asphalitine can produce competitive Adsorption phenomenon in electrostatic separation process and catalyst particles, influence solia particle removal effect.

The content of the invention

To solve existing technical problem, the present invention provides system and the side of a kind of slurry oil production needle-shape coke raw material Method.

To reach above-mentioned purpose, the technical proposal of the invention is realized in this way:

A kind of system that slurry oil produces needle-shape coke raw material, the system includes:Vacuum distillation unit, electrostatic separation of solid and liquid list Member, extraction unit;Wherein, the vacuum distillation unit is connected by pipeline with the electrostatic solid-liquid separation unit;The extracting Unit is connected by pipeline with the electrostatic solid-liquid separation unit or the vacuum distillation unit.

Wherein, the electrostatic solid-liquid separation unit includes electrostatic solid-liquid separator, the electrostatic solid-liquid separator bag Dc source, programmable logic controller (PLC) and multiple electrostatic separation of solid and liquid modules are included, the dc source connection is the multiple Electrostatic separation of solid and liquid module, is that the multiple electrostatic separation of solid and liquid module produces electric field;The programmable logic controller (PLC) The multiple electrostatic separation of solid and liquid module is connected, the running status of each electrostatic separation of solid and liquid module is controlled;Each It is in parallel between the electrostatic separation of solid and liquid module.

Wherein, the system includes an electrostatic solid-liquid separation unit;Or, the system includes two or two Adopt and be connected serially between electrostatic solid-liquid separation unit described above, each electrostatic solid-liquid separation unit.

Wherein, the vacuum distillation unit includes heat exchanger, heating furnace and vacuum distillation tower;The heat exchanger passes through pipeline Import with the heating furnace is connected, and the outlet of the heating furnace is connected by pipeline with the entrance of the vacuum distillation tower Connect, the outlet of the vacuum distillation tower is connected by pipeline with the electrostatic solid-liquid separator of the electrostatic solid-liquid separation unit.

Wherein, the extraction unit includes extraction device and solvent recovery unit;The outlet of the extraction device, entrance point It is not connected by pipeline with the solvent recovery unit;The entrance of the extraction device connects the electrostatic solid-liquid separation unit Outlet, outlet output needle-shape coke raw material;Or, the entrance input slurry oil raw material of the extraction device, the outlet connection decompression The entrance of distillation unit.

Wherein, the system also includes:Hydrofinishing unit;If the extraction unit is consolidated by pipeline and the electrostatic Liquid separative element is connected, then the hydrofinishing unit connects the outlet of the extraction unit;If the extraction unit passes through Pipeline is connected with the vacuum distillation unit, then the hydrofinishing unit connects the outlet of the electrostatic solid-liquid separation unit.

A kind of method that slurry oil produces needle-shape coke raw material, methods described includes:

Raw material slurry oil enters vacuum distillation unit and carries out vacuum distillation, isolates lightweight oil ingredient, stage casing oil ingredient and tail Oil ingredient;

The stage casing oil ingredient enters electrostatic solid-liquid separation unit and carries out electrostatic separation of solid and liquid, removes remaining solid micro- Grain, obtains refined stage casing oil;

The refined stage casing oil enters extraction unit and carries out solvent extraction, obtains needle-shape coke raw material.

Wherein, after needle-shape coke raw material is obtained, methods described also includes:The needle-shape coke raw material enters hydrofinishing unit Hydrotreating, to adjust the constituent content in the needle-shape coke raw material.

A kind of method that slurry oil produces needle-shape coke raw material, methods described includes:It is molten that raw material slurry oil enters extraction unit progress Agent is extracted, and extracts heavy aromatics component;The raw material slurry oil after heavy aromatics component is extracted to be depressurized into vacuum distillation unit Distillation, isolates the stage casing oil ingredient suitable for production needle-shape coke raw material;The stage casing oil ingredient enters electrostatic separation of solid and liquid list Member carries out electrostatic separation of solid and liquid, removes remaining solia particle, obtains needle-shape coke raw material.

Wherein, after needle-shape coke raw material is obtained, methods described also includes:The needle-shape coke raw material enters hydrofinishing unit Hydrotreating, to adjust the constituent content in the needle-shape coke raw material.

The present invention removes the catalyst particles in slurry oil using electrostatic separation of solid and liquid, and advantage is that the temperature of separation is low, Resistance is small, and separative efficiency is higher, is particularly thinner powder, more adsorbed.By " vacuum distillation+electrostatic point solid-liquid from Device " process combination removes solia particle, and produce needle-shape coke raw material effective group is obtained by " vacuum distillation+extracting " process combination Point, the catalyst particles in slurry oil can be effectively removed, particularly less than 5 microns tiny catalyst particles make consolidating after processing Phase content reaches below 10ppm.

The solia particles such as the most of catalyst of vacuum distillation excision are first passed through in the present invention, can effectively mitigate electrostatic separation Load, while vacuum distillation has also cut off resin and asphalt etc., eliminates the competitive Adsorption phenomenon of electrostatic separation process, improves Solia particle removal effect.

Brief description of the drawings

In accompanying drawing (it is not necessarily drawn to scale), similar reference phase described in different views As part.Similar reference numerals with different letter suffix can represent the different examples of similar component.Accompanying drawing is with example Unrestricted mode generally shows each embodiment discussed herein.

Fig. 1 is a kind of composition structural representation of the system of slurry oil production needle-shape coke raw material of the embodiment of the present invention;

Fig. 2 is the composition structural representation of the electrostatic solid-liquid separator of the embodiment of the present invention;

Fig. 3 is the composition structural representation of hydrofinishing unit of the embodiment of the present invention;

Fig. 4 is the schematic flow sheet that a kind of slurry oil of the embodiment of the present invention produces needle-shape coke raw material method;

Fig. 5 is the schematic flow sheet that another slurry oil of the embodiment of the present invention produces needle-shape coke raw material method;

Wherein, 1, heat exchanger, 2, heating furnace, 3, vacuum distillation tower, 4, electrostatic solid-liquid separator, 5, extraction device, 6, Solvent recovery unit, 7, vacuum distillation unit, 8, electrostatic solid-liquid separation unit, 9, extraction unit, 10, hydrofinishing unit, 11, Reaction unit, 12, gas-liquid separation device, 13, desulfurizer, 14, recycle hydrogen compression set.

Embodiment

In view of the shortcomings of the prior art, there is provided a kind of slurry oil production needle coke is former on the basis of existing technology by the present invention The system of material, the system is particularly suited for producing needle-shape coke raw material with the catalytic slurry of high solids content.

Embodiment one

As shown in figure 1, the system that a kind of slurry oil of the embodiment of the present invention produces needle-shape coke raw material, including vacuum distillation unit 7th, electrostatic solid-liquid separation unit 8, extraction unit 9;Wherein, vacuum distillation unit 7 passes through pipeline and the phase of electrostatic solid-liquid separation unit 8 Connection;Electrostatic solid-liquid separation unit 8 is connected by pipeline with extraction unit 9.

Specifically, in the present embodiment, vacuum distillation unit 7 is placed on to the first paragraph of whole system, followed by electrostatic solid-liquid It is extraction unit 9 after separative element 8, electrostatic solid-liquid separation unit 8.That is, outlet and the electrostatic of vacuum distillation unit 7 The entrance connection of solid-liquid separation unit 8, the outlet of electrostatic solid-liquid separation unit 8 is connected with the entrance of extraction unit 9, extraction unit 9 outlet obtains needle-shape coke raw material.

Specifically, as shown in figure 1, vacuum distillation unit 7 includes heat exchanger 1, heating furnace 2, vacuum distillation tower 3, wherein, subtract The entrance of destilling tower 3 is pressed to connect heating furnace 2 by pipeline.Heat exchanger 1 is connected by pipeline with the import of heating furnace 2;Heating The outlet of stove 2 is connected by pipeline with the entrance of vacuum distillation tower 3, and the outlet of vacuum distillation tower 3 is consolidated by pipeline and electrostatic The electrostatic solid-liquid separator 4 of liquid separative element 8 is connected.As shown in figure 1, raw material is after the heat exchange of heat exchanger 1, into heating furnace 2, hereafter temperature is gradually reduced in technological process, rationally using heat energy, reduction loss.

As shown in figure 1, electrostatic solid-liquid separation unit 8 uses electrostatic solid-liquid separator 4, electrostatic solid-liquid separator 4 Entrance connects the vacuum distillation tower 3 of vacuum distillation unit 7 by pipeline, exports the extracting for connecting extraction unit 9 by pipeline and fills Put 5.Here, the application of electrostatic solid-liquid separator 4, can effectively remove the catalyst particles in slurry oil, particularly 5 microns with Under tiny catalyst particles, the solid concentration after processing is reached below 10ppm, the slurry oil that can handle high solids content is former Material.

Electrostatic solid-liquid separation unit 8 uses electrostatic solid-liquid separator 4.In addition to electrostatic solid-liquid separator, tradition The modes such as technique is mechanically decoupled, filtering type separation, but effect is bad.As shown in Fig. 2 electrostatic solid-liquid separator 4 is led To include dc source 41, multiple electrostatic separation of solid and liquid modules 42 and programmable logic controller (PLC) (PLC) 43 etc..The direct current Power supply connects the multiple electrostatic separation of solid and liquid module, is that the multiple electrostatic separation of solid and liquid module produces electric field;It is described Programmable logic controller (PLC) connects the multiple electrostatic separation of solid and liquid module, each electrostatic separation of solid and liquid module of control Running status.The core texture of electrostatic solid-liquid separator is electrostatic separation of solid and liquid module 42, and other structures are for electrostatic What formula separation of solid and liquid module 42 was serviced.The effect of dc source 41 is to produce electric field, is not pump power electric, nor illumination is used Electricity.The effect of programmable logic controller (PLC) 43 is the valve for controlling each electrostatic separation of solid and liquid module 42, makes each electrostatic The automatic running of separation of solid and liquid module 42.Run after a period of time, the solia particle of absorption increases, it is necessary to backwash, and flushing is completed After continue to run with.It is in parallel between each electrostatic separation of solid and liquid module 42, some to be backwashed, some work is to carry out Electrostatic separation processing, these processes are automatically controlled.That is, the running status of each electrostatic separation of solid and liquid module 42 Automatically controlled by programmable logic controller (PLC) 43.In practical application, electrostatic solid-liquid separator 4 is modular organization, Treating capacity can be improved by increasing number of modules, i.e., improve electrostatic solid-liquid by increasing the quantity of electrostatic separation of solid and liquid module 42 The treating capacity of separator 4.

In practical application, electrostatic solid-liquid separation unit 8 can be disposed by the way of two-stage tandem.That is, can be with Set in the system of the present invention between two electrostatic solid-liquid separation units 8, two electrostatic solid-liquid separation units using string Connection mode is connected, and the entrance of an electrostatic solid-liquid separation unit connects the vacuum distillation unit, another electrostatic solid-liquid The entrance of separative element connects the outlet of the electrostatic solid-liquid separation unit.Separation so can be improved by electrostatic separation twice Effect, but cost can be increased, it can set as needed.

Specifically, as shown in figure 1, extraction unit 9 includes extraction device 5, solvent recovery unit 6.Extraction device 5 passes through pipe Road is connected with solvent recovery unit 6.The outlet of extraction device 5, entrance are connected by pipeline with solvent recovery unit 6 respectively.It is real In the application of border, the circulation solvent of solvent recovery unit 6 preferably uses wet furfural, and wet furfural has no significant effect to raffinate oil quality, The technological process of Solvent recovery portion is also simplify simultaneously, is reduced equipment, has been saved investment.In practical application, extraction device 5 Preferably extraction tower.

In addition, a set of hydrofinishing unit can also be further added by the system of the slurry oil production needle-shape coke raw material of the present invention. In practical application, hydrofinishing unit is arranged on to the final stage of system of the present invention, it is high in needle-shape coke raw material sulfur content In the case of can be made by the hydrotreating of hydrofinishing unit its sulfur content reduction, and cause which part be connected with sulphur Aromatic rings hydrogenation saturation, adjustment needle-shape coke raw material in constituent content, remove some micro nonideal chemical constituents, make Obtained needle-shape coke raw material adaptability is stronger, better quality, but cost also can accordingly increase much, can be according to actually generating needs Set.Specifically, in the present embodiment, the hydrofinishing unit connects the extraction unit, specifically by the hydrofinishing list The entrance of member connects the outlet of extraction device in the extraction unit, and the outlet output needle coke of the hydrofinishing unit is former Material.

As shown in figure 3, being the composition structural representation of hydrofinishing unit.Hydrofinishing unit 10 includes:Reaction unit 11st, gas-liquid separation device 12, desulfurizer 13 and recycle hydrogen compression set 14.Wherein, reaction unit 11 uses fixed bed reaction Catalyst for demetalation and desulphurization catalyst are housed, hydrofinishing main chemical reactions have hydrodesulfurization, hydrogenation de- in device, reactor Metal etc..Demetalization, can prevent Hydrobon catalyst to be poisoned.Hydrodesulfurization reaction mainly has two paths, and one is directly to add Hydrogen desulfurization, two be that the aromatic rings being connected with sulphur is first hydrogenated with, then desulfurization.Needle-shape coke raw material after the processing of reaction unit 11 passes through gas-liquid Separator 12 separates the needle-shape coke raw material that high-quality is exported after unreacted hydrogen.By gas-liquid separation device 12 isolate it is not anti- Answer hydrogen to remove hydrogen sulfide using methyl diethanolamine by desulfurizer 13, enter recycle hydrogen pressure after being compressed together with supplement hydrogen Compression apparatus 14 is recycled.General needle-shape coke raw material requires that sulfur content is less than 0.5%, and essence is hydrogenated with by hydrofinishing unit Product sulfur content after system is less than 0.3%, can be used as the raw material for producing high-quality needle coke.

The system for producing needle-shape coke raw material by the above-mentioned slurry oil of the present embodiment can realize that the refined production needle coke of slurry oil is former The method of material, this method includes slurry oil vacuum distillation, separation of solid and liquid, extractive process, using " vacuum distillation-electrostatic solid-liquid point From-extracting " order perform, specifically, as shown in figure 4, key step is as follows:

Step 301, slurry oil vacuum distillation:That is, raw material slurry oil, which enters vacuum distillation unit, carries out vacuum distillation, point Separate out lightweight oil ingredient, stage casing oil ingredient and tail oil component;

Specifically, after the raw material slurry oil from raw material tank field exchanges heat through heat exchanger 1, enter back into heating furnace 2 and be heated to 360- 380 DEG C, into vacuum distillation tower 3, vacuum distillation tower 3 therefrom isolates lightweight oil ingredient, stage casing oil ingredient and tail oil component, oil Colloid, asphalitine and solia particle in slurry largely enter tail oil component.

So, vacuum distillation has also cut off resin and asphalt etc., eliminates the competitive Adsorption phenomenon of electrostatic separation process, Improve solia particle removal effect.

Step 302, electrostatic separation of solid and liquid:That is, the stage casing oil ingredient is carried out into electrostatic solid-liquid separation unit Electrostatic separation of solid and liquid, removes remaining solia particle, obtains refined stage casing oil;

Specifically, stage casing oil ingredient step 301 obtained is exchanged heat with raw material slurry oil, and temperature is down to 160-200 DEG C, Into the electrostatic separation of solid and liquid module 42 of electrostatic solid-liquid separator 4, by dc source 41 in electrostatic separation of solid and liquid mould Block 42 produces high voltage electric field, and galvanic couple polarization occurs for solia particle under the high voltage electric field effect of electrostatic separation of solid and liquid module 42, So as to adsorbed, the solia particles such as remaining catalyst are removed, refined stage casing oil is obtained.

Here, electrostatic solid-liquid separator 4 can effectively remove the catalyst particles in slurry oil, particularly less than 5 microns carefully Small catalyst particles, make the solid concentration after processing reach below 10ppm.

Step 303, extractive process:That is, the refined stage casing oil enters extraction unit and carries out solvent extraction, obtain Needle-shape coke raw material.

Specifically, refined stage casing oil step 302 obtained is with after the heat exchange of raw material slurry oil, being cooled to 40-50 DEG C, into taking out Stripper is that extraction device 5 is carried out after solvent extraction, tapped oil recycling design, obtains needle-shape coke raw material, and extraction device 5 is returned after extracting The solvent of receipts passes through extraction device by its outlet feeding solvent recovery unit 6, solvent recovery unit 6 after solvent dehydration is refined 5 entrance is sent extraction device 5 back to and reused.

Here, in step 303 of the present invention, the extracting of extraction device 5 does solvent, oil ratio 1 using furfural:1, column bottom temperature 35-45 DEG C, 60-65 DEG C of tower top temperature.

Here,, can by adjusting the operating parameter of vacuum distillation tower 3 and extraction device 5 in step 301 of the present invention, 302 To obtain the active principle of production needle-shape coke raw material.Slurry oil can remove asphalitine, colloid and partially catalyzed by vacuum distillation tower 3 Agent, the competitive Adsorption phenomenon of electrostatic separation process can be eliminated by removing asphalitine and colloid, improve solia particle removal effect.

If increasing hydrofinishing unit in system, in correlation method, it can also finally increase hydrotreating Step, to reduce the sulfur content in needle-shape coke raw material, removes some micro nonideal chemical constituents, so as to get needle coke Adaptability to raw material is stronger, better quality, but cost also can accordingly increase much, can need to set according to actually generating.

In the present embodiment, handled using the order of " vacuum distillation-electrostatic separation of solid and liquid-extracting ", by temperature from It is high to Low to reduce successively, heat energy is made full use of, the energy can be saved.

Embodiment two

The system that the slurry oil that the present embodiment is provided produces needle-shape coke raw material, its composition is identical with embodiment one, unlike The annexation of vacuum distillation unit, electrostatic solid-liquid separation unit and extraction unit.In the present embodiment, extraction unit is placed on whole The first paragraph of individual system, is electrostatic solid-liquid separation unit after vacuum distillation unit followed by vacuum distillation unit.Namely Say, the outlet of extraction unit is connected with the entrance of vacuum distillation unit, outlet and the electrostatic separation of solid and liquid list of vacuum distillation unit The entrance connection of member, the outlet output needle-shape coke raw material of electrostatic solid-liquid separation unit.

Specifically, in extraction unit, the outlet of extraction device, entrance are connected by pipeline with solvent recovery unit respectively. Raw material slurry oil is entered by the entrance of extraction device, the entrance of heat exchanger in the outlet connection vacuum distillation unit of extraction device.

In vacuum distillation unit, the entrance of heat exchanger connects the outlet of extraction device, and outlet passes through pipeline and heating furnace Import is connected;The outlet of heating furnace is connected by pipeline with the entrance of vacuum distillation tower, and the outlet of vacuum distillation tower passes through Pipeline is connected with the entrance of electrostatic solid-liquid separator 4 in electrostatic solid-liquid separation unit.

In electrostatic solid-liquid separation unit, the entrance of electrostatic solid-liquid separator 4 is connected in vacuum distillation unit by pipeline The outlet of vacuum distillation tower, outlet output needle-shape coke raw material.

In the present embodiment, the composition structure in vacuum distillation unit, electrostatic solid-liquid separation unit and extraction unit is with implementing Example one is identical, and mode described in embodiment one can also be used in actual deployment and application, is repeated no more.

The system for producing needle-shape coke raw material by the above-mentioned slurry oil of the present embodiment can realize that the refined production needle coke of slurry oil is former The method of material, this method includes slurry oil vacuum distillation, separation of solid and liquid, extractive process, essentially identical with the methods described of embodiment one, Except that processing sequence.In the present embodiment, first extracting, again separation of solid and liquid, last vacuum distillation, i.e., " extracting-decompression is steamed Evaporate-electrostatic separation of solid and liquid ".Specifically, as shown in figure 5, this method comprises the following steps:

Step 401, extractive process:Raw material slurry oil first passes through extraction device, extracts heavy aromatics component;

It is, raw material slurry oil, which enters extraction unit, carries out solvent extraction, heavy aromatics component is extracted.

Step 402, vacuum distillation process:Pass through vacuum distillation apparatus again, cut out the component suitable for production needle coke;

Here, extract the raw material slurry oil after heavy aromatics component and carry out vacuum distillation into vacuum distillation unit, isolate Stage casing oil ingredient suitable for producing needle-shape coke raw material.

Step 403, separation of solid and liquid process:Separation of solid and liquid is carried out, solia particle therein is removed, reaches needle-shape coke raw material mark It is accurate.

Here, the stage casing oil ingredient of step 402 enters electrostatic solid-liquid separation unit progress electrostatic separation of solid and liquid, removes Remaining solia particle, obtains needle-shape coke raw material.

In the present embodiment, each step of the above method to implement process identical with embodiment one, repeat no more.

If hydrofinishing unit, can be connected to the electrostatic solid-liquid point by increase hydrofinishing unit in the present embodiment Electrostatic separation of solid and liquid in electrostatic solid-liquid separation unit is connected to from the outlet of unit, that is, by the entrance of hydrofinishing unit The outlet of device, needle-shape coke raw material is exported by the outlet of hydrofinishing unit.If increasing hydrofinishing unit in system, corresponding In method, the step of finally can also increasing a hydrotreating, that is, by the needle-like after needle-shape coke raw material is obtained Burnt raw material sends into hydrofinishing unit hydrotreating, to reduce the sulfur content in needle-shape coke raw material, adjusts constituent content, adjusts pin Shape Jiao raw material in constituent content, remove some micro nonideal chemical constituents, so as to get needle-shape coke raw material adaptability It is stronger, better quality, but cost also can accordingly increase much, can need to set according to actually generating.

The system that the slurry oil that the present invention is provided produces needle-shape coke raw material, using vacuum distillation+extraction process, producible pin Shape Jiao's raw produce has heavy aromatics, light aromatic hydrocarbons, wax oil, pitch, BTX aromatics etc., and heavy aromatics is mainly used in RX, changed Property pitch, PDC plasticizer, needle coke etc..

Present system removes the catalyst particles in slurry oil using electrostatic solid-liquid separator, and advantage is the temperature of separation Degree is low, and resistance is small, and separative efficiency is higher, is particularly thinner powder, more adsorbed.By the way that " vacuum distillation+electrostatic point is solid Liquid is from device " process combination removing solia particle, pass through " vacuum distillation+extracting " process combination and obtain having for production needle-shape coke raw material Component is imitated, the catalyst particles in slurry oil can be effectively removed, particularly less than 5 microns tiny catalyst particles make after processing Solid concentration reach below 10ppm.The solia particles such as the most of catalyst of vacuum distillation excision are first passed through in the present invention, then are passed through The load of electrostatic separator can be mitigated by crossing electrostatic separator, improve particulate removal effect.Colloid and drip are cut off by vacuum distillation Blue or green matter, eliminates the competitive Adsorption phenomenon of electrostatic separation process, improves solia particle removal effect.

The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.

Claims (10)

1. the system that a kind of slurry oil produces needle-shape coke raw material, it is characterised in that the system includes:Vacuum distillation unit, electrostatic Solid-liquid separation unit, extraction unit;Wherein, the vacuum distillation unit is connected by pipeline and the electrostatic solid-liquid separation unit Connect;The extraction unit is connected by pipeline with the electrostatic solid-liquid separation unit or the vacuum distillation unit.
2. system according to claim 1, it is characterised in that the electrostatic solid-liquid separation unit includes electrostatic solid-liquid point From device;
The electrostatic solid-liquid separator includes dc source, programmable logic controller (PLC) and multiple electrostatic separation of solid and liquid moulds Block, the dc source connects the multiple electrostatic separation of solid and liquid module, is the multiple electrostatic separation of solid and liquid module production Raw electric field;The programmable logic controller (PLC) connects the multiple electrostatic separation of solid and liquid module, controls each described electrostatic The running status of separation of solid and liquid module;It is in parallel between each described electrostatic separation of solid and liquid module.
3. system according to claim 2, it is characterised in that
The system includes an electrostatic solid-liquid separation unit;
Or, the system includes two or more described electrostatic solid-liquid separation units, each electrostatic separation of solid and liquid list Adopt and be connected serially between member.
4. system according to claim 2, it is characterised in that
The vacuum distillation unit includes heat exchanger, heating furnace and vacuum distillation tower;The heat exchanger is added by pipeline with described The import of hot stove is connected, and the outlet of the heating furnace is connected by pipeline with the entrance of the vacuum distillation tower, described to subtract The outlet of pressure destilling tower is connected by pipeline with the electrostatic solid-liquid separator of the electrostatic solid-liquid separation unit.
5. system according to claim 1, it is characterised in that
The extraction unit includes extraction device and solvent recovery unit;The outlet of the extraction device, entrance pass through pipe respectively Road is connected with the solvent recovery unit;
The entrance of the extraction device connects the outlet of the electrostatic solid-liquid separation unit, outlet output needle-shape coke raw material;Or, The entrance input slurry oil raw material of the extraction device, the entrance of the outlet connection vacuum distillation unit.
6. system according to claim 1, it is characterised in that the system also includes:Hydrofinishing unit;
If the extraction unit is connected by pipeline with the electrostatic solid-liquid separation unit, the hydrofinishing unit connection The outlet of the extraction unit;
If the extraction unit is connected by pipeline with the vacuum distillation unit, the hydrofinishing unit connection is described The outlet of electrostatic solid-liquid separation unit.
7. a kind of method that slurry oil produces needle-shape coke raw material, it is characterised in that methods described includes:
Raw material slurry oil enters vacuum distillation unit and carries out vacuum distillation, isolates lightweight oil ingredient, stage casing oil ingredient and tail oil group Point;
The stage casing oil ingredient enters electrostatic solid-liquid separation unit and carries out electrostatic separation of solid and liquid, removes remaining solia particle, obtains To refined stage casing oil;
The refined stage casing oil enters extraction unit and carries out solvent extraction, obtains needle-shape coke raw material.
8. method according to claim 7, it is characterised in that after needle-shape coke raw material is obtained, methods described also includes:
The needle-shape coke raw material enters hydrofinishing unit hydrotreating, to adjust the constituent content in the needle-shape coke raw material.
9. a kind of method that slurry oil produces needle-shape coke raw material, it is characterised in that methods described includes:
Raw material slurry oil enters extraction unit and carries out solvent extraction, extracts heavy aromatics component;
Extract the raw material slurry oil after heavy aromatics component and carry out vacuum distillation into vacuum distillation unit, isolate suitable for production The stage casing oil ingredient of needle-shape coke raw material;
The stage casing oil ingredient enters electrostatic solid-liquid separation unit and carries out electrostatic separation of solid and liquid, removes remaining solia particle, obtains To needle-shape coke raw material.
10. method according to claim 9, it is characterised in that after needle-shape coke raw material is obtained, methods described also includes: The needle-shape coke raw material enters hydrofinishing unit hydrotreating, to adjust the constituent content in the needle-shape coke raw material.
CN201510340928.9A 2015-06-18 2015-06-18 Slurry oil produces the system and method for needle-shape coke raw material CN104962314B (en)

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