CN207973707U - A kind of needle coke process units - Google Patents
A kind of needle coke process units Download PDFInfo
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- CN207973707U CN207973707U CN201820003210.XU CN201820003210U CN207973707U CN 207973707 U CN207973707 U CN 207973707U CN 201820003210 U CN201820003210 U CN 201820003210U CN 207973707 U CN207973707 U CN 207973707U
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Abstract
The utility model provides a kind of needle coke process units.The device includes：Clarified oil surge tank, raw material pump, heating furnace, coke drum, heat exchange condensing tower, radiation feed pump, wax oil pump, wax oil evaporator and wax oil cooler；Coke drum is two；Clarified oil surge tank is connected to heating furnace convection cell by pipeline, and raw material pump is provided on the pipeline, and heating furnace convection cell is connected to heat exchange condensing tower evaporator section；Coke drum tower top oil gas vent is connected to heat exchange condensing tower evaporator section；Heat exchange condensing tower bottom of tower joint oil export is connected to radiation feed pump, reconnects in radiation chamber；The wax oil outlet of heat exchange condensing tower oil sump tank is connected to wax oil pump, then divides two-way, is connected to two coke column overheads all the way, and another way is connected to wax oil evaporator, then divides three tunnels to be connected to heat exchange condensation column overhead, below oil sump tank and wax oil cooler；Radiation chamber joint oil export is connected to two coke drums by four-way valve.The needle coke process units can produce high-quality needle coke.
Description
Technical field
The utility model is related to a kind of needle coke process units, belong to carbon material technical field.
Background technology
High-quality needle coke product is the quality material for manufacturing high power and ultra-high power graphite electrode.Needle coke is according to using raw material
It is divided into petroleum and coal measures, the former is using the U.S. as representative, and the latter is using Japan as representative.Chinese oil system is burnt and coal measures coke quality is not up to
To high-quality needle coke quality requirement, and low output cannot meet the market supply.The domestic existing burnt technique productions of oil system are of high cost, do not have
There is feedstock pre-processing system technology, feedstock property fluctuation is big, unstable, is extremely difficult to high-quality needle coke quality index requirement,
It seriously affects product quality and restricts output increased.With metallurgy industry technology upgrading, in recent years, high power and ultra high power
Electrode dosage increases, and high-quality needle coke product dosage increases obviously, and import volume increases.
Although needle coke is the carbon content product highly condensed in 96% or more petroleum hydrocarbon, but produce used in needle coke
Feedstock oil and the process conditions that need to use made a big difference with general coke is produced.In mink cell focus, n-alkane, cycloalkane
Side chain is made of four valence electron chain carbon atoms, and it is by the aromatic carbon atom of a pi-electron and three valence electrons to have aromatic ring only
It constitutes.Macromolecular can be shortened by the aromatic ring free radical of aromatic carbon atomic building, expanded to two-dimensional in-plane, and by chain carbon atom
When the naphthenic ring free radical of composition is condensed into macromolecular, then to the three-dimensional to expansion of three-dimensional.And chain carbon condensation product is then laterally longitudinal
There is chemical chain combination.Therefore, condensed ring cycloalkanes it is highly condensed at coke then be isotropism, have in composition spherical and needle-shaped
Difference.Therefore, the raw material of high-quality coke need to select chain carbon and cycloalkanes carbon few, the heavy oils more than aromatic carbon, general colloid and pitch
Matter contains significant portion of condensed ring cycloalkanes chain carbon, therefore should not make the raw material of needle coke containing the decompression residuum more than resin and asphalt.
Feedstock oil is in pyrogenetic reaction, and with the intensification of condensation level, the carbon content of reactant is continuously increased, and side chain is gradual
It reduces, aromatic ring face continues to expand, and molecular weight is increasing, and fused ring compound starts polycondensation together, forms micella or molecular beam
Colloidal solid, while have a kind of orientation between the aromatic ring of planar structure paves or comes into line effect.In colloidal solid into one
One-step polycondensation to a certain extent when, it may appear that a kind of crystallization having sharp interface with mother liquor, its existing anisotropic solid property,
Have again in spherical characteristics of liquids when can flow, suspend, therefore claims interphase.The crystallization separated from mother liquor is that interphase is small
Sphere assembles the molecule of many condensed-nuclei aromatics inside spherula with having levels.
Spherula meets and melts simultaneously there are one generating and growing up, and viscosifies and aging and orientation and cured variation course.
These variations are different with the difference of reaction condition.The general crystal of bead body image just generated like that at high temperature can be molten with mother liquor
Solution can be precipitated again in low temperature, under slowly liter mild reaction conditions, the aromatic hydrocarbon molecule etc. in energy absorption mother liquor, grow up to compared with
Big sphere, maximum spherula diameter can also meet with other spherula up to 100 μm or more and aromatic hydrocarbons synusia occur and inserts
What is entered melts simultaneously, forms multiple ball, final curing coke.Spherula is substantially the presoma of coke.It is complete to form high grade coke
Depending on spherular variation course.
CN1872963A discloses a kind of preprocessing method of raw materials producing needle coke, and feedstock oil is first removed through vacuum distillation
Wherein undesirable components, remaining ideal composition are contacted with hydrogen, hydrogenation catalyst, and hydrogenation reaction object is isolated to production needle
The raw material of shape coke.This method need to filter individually, vacuum distillation apparatus, and investment is larger, and be obtained by this method needle-shaped
Still contain a certain amount of colloid in burnt raw material, the quality of needle coke can be influenced, it is more tired to produce high-grade needle coke product
It is difficult.
CN103013567A discloses a kind of method for the raw material producing needle coke by catalytic slurry, and protection zone is arranged and adds
Hydroformylation reaction zone, catalytic slurry are introduced into protection zone, and absorption is fallen most catalytic cracking catalyst powder, then mixed with hydrogen
Enter hydroconversion reaction zone into heating furnace, after heating and carries out hydrotreating.Protection zone is set before hydroconversion reaction zone, can be filtered out big
Partially catalyzed Cracking catalyst powder achievees the purpose that protection plus hydrogen major catalyst, realizes long-term operation.But using suction
Attached mode carries out the needle coke that pretreatment of raw material is still difficult to make to be prepared and reaches high-quality needle coke quality index requirement.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of needle coke process units.This is needle-shaped
Burnt process units can produce high-quality needle coke, and it is simple with technological process, operability is strong, is easy to industrialized production
The advantages that.
A kind of in order to achieve the above object, the utility model provides needle coke process units, includes at least：Clarified oil is slow
Rush tank, raw material pump, heating furnace, coke drum, heat exchange condensing tower, radiation feed pump, wax oil pump, wax oil evaporator, wax oil cooler；
The quantity of the coke drum is two；
The clarified oil surge tank is connected to the clarification oil-in of the convection cell of the heating furnace by pipeline, and in the pipe
The raw material pump is provided on line, the clarification oil export of the convection cell of the heating furnace is connected to the heat exchange by pipeline and condenses
The clarification oil-in of tower evaporator section；
The oil gas vent of the coke column overhead is connected to the oil gas entrance of the heat exchange condensing tower evaporator section by pipeline,
Clarified oil exchanges heat with the oil gas from coke drum in the heat exchange condensing tower；
First joint oil export of the heat exchange condensing tower bottom of tower is connected to the radiation feed pump by pipeline, then passes through
Pipeline is connected to the joint oil-in of the radiation chamber of the heating furnace；The joint oil export of the radiation chamber of the heating furnace passes through pipe
Line is connected to two coke drums with four-way valve；
The wax oil outlet of the heat exchange condensing tower oil sump tank is connected to the wax oil by pipeline and pumps, and then passes through pipeline point
Two-way, is connected to the tower top of two coke drums all the way, and another way is connected to the entrance of the wax oil evaporator, the wax oil evaporation
The outlet of device is connected to the first wax oil reflux inlet of the heat exchange condensation column overhead, the heat exchange by three tunnels of pipeline point
The second wax oil reflux inlet below condensing tower oil sump tank and the wax oil cooler；
The heating furnace is additionally provided with fuel gas entrance；
The tower top of the heat exchange condensing tower is additionally provided with oil gas vent.
In above-mentioned apparatus, it is preferable that the clarification oil export of the convection cell of the heating furnace divides two-way to connect by pipeline
In two clarification oil-ins of the heat exchange condensing tower evaporator section.
Specific implementation mode according to the present utility model, it is preferable that above-mentioned apparatus further includes：Feedstock pre-processing system is used
In making slurry oil obtain clarified oil after feedstock pre-processing system processing, obtained clarified oil is buffered into the clarified oil
Tank；The feedstock pre-processing system includes at least：Even number filter, slurry oil intake pipeline, recoil washing oil intake pipeline, recoil
Washing oil export pipeline, clarified oil export pipeline；The even number filter is connected in parallel by pipeline, the slurry oil intake pipeline
The slurry oil feed(raw material)inlet on each filter top is connected to by pipeline, the recoil washing oil intake pipeline is distinguished by pipeline
It is connected to the backwash oil-in of each filter bottom, the recoil washing oil export pipeline is connected to each filtering by pipeline
One end of the backwash oil export on device top or bottom, the clarified oil export pipeline is connected to each filter by pipeline
The other end of the clarification oil export on top or bottom, the clarified oil export pipeline is connected to the clarified oil surge tank；Wherein,
It is when the recoil washing oil export pipeline is connected to the backwash oil export on each filter top by pipeline, then described clear
Edible vegetable oil export pipeline is connected to the clarification oil export of each filter bottom, and the clarification oil export and institute by pipeline
It is same port to state backwash oil-in；When the recoil washing oil export pipeline is connected to each filter bottom by pipeline
Backwash oil export when, then the clarified oil export pipeline is connected to the clarified oil on each filter top by pipeline and goes out
Mouthful, and the backwash oil export and the backwash oil-in are same port.
In addition, the feedstock pre-processing system can also include：Protect gas intake pipeline, the protection gas intake pipeline logical
It crosses pipeline and is connected to the recoil washing oil intake pipeline and the clarified oil export pipeline or the recoil washing oil efferent duct
Line purges the remaining oil gas in pipeline and filter for being passed through protection gas, ensures safety.Wherein, protection gas can be with
For protective gas commonly used in the art, such as air.
In addition, the feedstock pre-processing system can also include：Purification cleaning pipeline, the purification cleaning pipeline pass through pipe
Line is connected to the backwash oil-in of each filter bottom, for being rinsed to filter using other media.Right
When the degree of purity of clarified oil requires relatively high, additionally filter can be rinsed using other medium.
In addition, the feedstock pre-processing system can also include：Urgent blowdown pipeline, the urgent blowdown pipeline pass through pipe
Line is connected to the clarification oil export or backwash oil export of each filter bottom, in emergency circumstances moving back oil.
In above-mentioned apparatus, it is preferable that the filter is a hollow cylinder, and the top of the cylinder sets that there are two ends
Mouthful, respectively slurry oil feed(raw material)inlet and backwash oil export or clarification oil export, the bottom of the cylinder sets that there are one bottom nozzles
With a side ports, when one of upper port of the cylinder is backwash oil export, then the bottom nozzle of its bottom is backwash
Oil-in and clarification oil export, when one of upper port of the cylinder is clarification oil export, then the bottom nozzle of its bottom is anti-
Oil-in and backwash oil export are rinsed, the side ports of the cylinder bottom are sewage draining exit, which is internally provided with an electrode, should
Electrode is connected with a high-voltage connection.
In above-mentioned apparatus, it is preferable that the thermic load of the heating furnace is 3.5-10MW.
In above-mentioned apparatus, it is preferable that the joint oil-in of the radiation chamber of the heating furnace is two, combines oil two-way
Into the radiation chamber of heating furnace.
In above-mentioned apparatus, it is preferable that it is defeated that the joint oil-in of the radiation chamber of the heating furnace is also associated with middle pressure steam
Enter pipeline, make the joint oil-in (can be two entrances) of heating furnace radiation chamber while injecting a certain amount of middle pressure steam, with
Flow velocity of the joint oil in boiler tube is improved, tube coking is prevented.It is highly preferred that the pressure of medium pressure steam is 3.5MPa.
In above-mentioned apparatus, it is preferable that a diameter of 5400-8800mm of the coke drum.
Specific implementation mode according to the present utility model, it is preferable that above-mentioned apparatus further includes：1.3MPa steam and water conveying
Pipeline, the four-way valve are connected with the 1.3MPa by threeway on oily feed-line with connected the combining of a certain coke drum and steam
Vapour and water feed-line are blown with steam for the coke drum to not produced and catch up with air and pressure testing inspection, and for life
The needle coke accumulated in the coke drum terminated is produced to be stripped, to water cooling and hydraulic decoking.
Specific implementation mode according to the present utility model, it is preferable that above-mentioned apparatus further includes：Oil gas preheating pipeline, two
Coke column overhead preheats pipeline by the oil gas and is connected, for the coke drum not produced blow through steam catch up with air and
After pressure testing checks, introduce the oil gas of the coke column overhead produced to it, so to the coke drum not produced into
Row cycle preheating.
It is highly preferred that above-mentioned apparatus further includes：Cold oil export pipeline gets rid of oil tank, gets rid of oil pump, the four-way valve with it is a certain
One end of the cold oil export pipeline is connected on the oily feed-line of joint that coke drum is connected by threeway, the cold oil is defeated
Go out pipeline the other end be connected to it is described get rid of oil tank, it is described get rid of oil tank by pipeline be connected to it is described get rid of oil pump, for that will use
The oil that oil gas condenses out after being preheated to the coke drum not produced transfers out device, into general burnt sump oil line.
Specific implementation mode according to the present utility model, it is preferable that above-mentioned apparatus further includes：3.5MPa steam pipeline
Line is connected to the four-way valve, for after certain coke drum terminates production, passing through the backward coke of decompression with 3.5MPa steam
It is blown in tower and catches up with oil gas.
In above-mentioned apparatus, it is preferable that a diameter of 1400-2600mm of the heat exchange condensing tower.
Specific implementation mode according to the present utility model, it is preferable that above-mentioned apparatus further includes：Slurry oil-joint oil heat exchanger,
Second joint oil export of circulating pump, the heat exchange condensing tower bottom of tower is connected to the circulating pump by pipeline, then passes through pipeline
It is connected to the joint oil loop head of the heat exchange condensing tower evaporator section, and the slurry oil-joint oil heat exchanger is set to institute
It states on the pipeline that circulating pump is connect with the oily loop head of joint of the heat exchange condensing tower evaporator section, and the slurry oil-joint
Oil heat exchanger enters the pipeline of feedstock pre-processing system with conveying slurry oil and connect, make the part combination oil of heat exchange condensing tower bottom of tower by
Circulating pump is extracted out from bottom of tower, and heat exchange condensing tower is returned after slurry oil-joint oil heat exchanger and slurry oil heat exchange.
The method for producing needle coke using above-mentioned needle coke process units provided by the utility model, includes at least following step
Suddenly：
Make clarified oil enter heat exchange condensing tower by the convection cell of heating furnace by raw material pump from clarified oil surge tank to steam
Send out section, the oil gas that coke column overhead is overflowed made to enter heat exchange condensing tower evaporator section, in the condensing tower that exchange heat clarified oil with from burnt
The oil gas of charcoal tower exchanges heat, and the wax oil following components in clarified oil enters together with the recycle oil being condensed in oil gas changes
Hot condensing tower bottom of tower forms connection and oil；
So that the joint oil of heat exchange condensing tower bottom of tower is fed pumped by radiation and is entered the radiation chamber of heating furnace, makes joint
After oil heats up in heating furnace, a coke drum is entered by four-way valve, the reaction in the coke drum of joint oil generates needle coke
And oil gas, needle coke are deposited in the coke drum tower, the oil gas is overflowed from the coke column overhead；When the froth bed of the coke drum
After reaching a certain height, then the joint oil after heating is set to enter another coke drum by four-way valve, and to the coke of production end
Charcoal tower is devoked, two coke drum rotation green cokes；
The wax oil of heat exchange condensing tower oil sump tank is set to pass through wax oil pumped, a part enters the tower top of coke drum, for making
Control coke column overhead temperatures for quench oil, another part enters wax oil evaporator, and tri- tunnels softened water heat exchange Hou Fen, respectively into
The condensation column overhead that enters to exchange heat is used as lower reflux as upper reflux, heat exchange condensing tower oil sump tank lower section and enters wax oil cooler
Go out device after cooling；Heat exchange condensing tower establishes wax oil cycle and the extraction of a part of wax oil, is able to maintain that heat exchange condensing tower
Normal thermal balance, it is ensured that the high circulation ratio of needle coke production；
The oil gas that heat exchange condensation column overhead is overflowed is set to go out device.
Specific implementation mode according to the present utility model, it is preferable that the above method is further comprising the steps of：Make slurry oil through original
Clarified oil is obtained after material pretreatment system processing, obtained clarified oil enters the clarified oil surge tank；
Wherein, make slurry oil handle through feedstock pre-processing system to specifically include：Make slurry oil by one or several filters into
Row filtering, obtains clarified oil；And used filter is cleaned with recoil washing oil, even number filter two-by-two one
It is right, another cleaning that works in a pair of of filter.
In the above-mentioned methods, it is preferable that used raw material slurry oil is the intermediate material of refinery catalytic cracking unit, that is, is catalyzed
Slurry oil.
In the above-mentioned methods, it is preferable that so that slurry oil is filtered by one or several filters and specifically include：Make slurry oil
By one or several filters, while by the voltage of 3.5~40,000 volts of high-voltage connection introducing in filter, in filter
Middle formation electromagnetic field " cylinder " adsorbs the impurity in slurry oil, obtains clarified oil, clarified oil is discharged from the clarification oil export.
In the above-mentioned methods, it is preferable that cleaning is carried out with recoil washing oil to used filter and is specifically included：Make recoil
Washing oil through backwash oil-in enter used filter in is cleaned, the recoil washing oil after cleaning from backwash oil export
Discharge, the impurity washed out are discharged from sewage draining exit.
In the above-mentioned methods, it is preferable that slurry oil is through feedstock pre-processing system pressure difference ＜ 0.45MPa before and after the processing.
Raw material slurry oil contains the impurity such as a large amount of catalyst finely divided particulate and heavy metal, it is necessary to be purged, removing is
It is no to be thoroughly related to needle coke product quality.Why domestic current needle coke process units, be not achieved high-quality needle coke
It is required that raw material pretreatment process backwardness is one of the major reasons.Using mechanical filter mode, filter core is frequently occluded, and is needed frequently more
It changes, it is of high cost.The traditional filterings mode such as mechanical filter, electrostatic separation, centrifugation, the solid of filtered slurry oil contain in 100-
500ppm cannot reach the requirement to yield products of quality.The utility model develops novel filter using Theory of Electromagnetic Field,
The solid content of raw material slurry oil can be made by 5000ppm or so to drop to 50ppm hereinafter, and available PLC automatically control, continuous metaplasia
Production, does not need filter core, electromagnetic field " cylinder " has adsorbed the impurity such as 99% micro powder granule, heavy metal, it is anti-periodically to turn off electromagnetic field
It rinses " cylinder ".It is totally different from traditional filtering mode, it is at low cost, it is the new technology of a substitution traditional filtering mode,
It thoroughly solves the problems, such as long-standing problem needle coke production technology, and is not limited only to needle coke production technology, other application field
It is wide.
In the above-mentioned methods, it is preferable that the temperature of the clarified oil from clarified oil surge tank out is 60 DEG C~140 DEG C,
Density is >=1.00g/cm3(20 DEG C), solid content are≤0.5% (mass fraction).
In the above-mentioned methods, it is preferable that enter the clarified oil of heat exchange condensing tower evaporator section by the convection cell of heating furnace
Temperature is 300 DEG C~320 DEG C.
In the above-mentioned methods, it is preferable that the clarified oil outlet temperature of the convection cell of the heating furnace is 300 DEG C~320 DEG C,
Clarified oil outlet pressure is 0.7MPa~0.9MPa, and the fire box temperature of convection cell is 700 DEG C~750 DEG C.
In the above-mentioned methods, it is preferable that the joint oil export temperature of the radiation chamber of the heating furnace is 450 DEG C~530 DEG C,
The temperature of connection and oil after heating up i.e. in heating furnace is 450 DEG C~530 DEG C, and the fire box temperature of radiation chamber is 800 DEG C~850
DEG C, the joint oil-in pressure of radiation chamber is 2.5MPa~3MPa, and joint oil export pressure is 0.7MPa~1MPa.More preferably
Ground, heating furnace are operated using alternating temperature, specifically include three phases, respectively constant temperature stage, cooling-constant temperature stage, heating-constant temperature
Stage；Wherein the radiation chamber outlet temperature in constant temperature stage is 480 DEG C~550 DEG C；Cooling-constant temperature stage is constant temperature one again that first cools down
The radiation chamber outlet temperature of section time, cooling-constant temperature stage are 420 DEG C~480 DEG C；Heating-constant temperature stage is the perseverance again that first heats up
The radiation chamber outlet temperature of warm a period of time, heating-constant temperature stage are 480 DEG C~550 DEG C.The utility model prepares needle coke
Technique is operated using alternating temperature, has larger recycle ratio and longer green coke period.Alternating temperature operation is divided into constant temperature stage, drop
Temperature-constant temperature stage, heating-constant temperature stage three phases.When the joint oil that heating furnace comes initially enters one by four-way Vavle switching
After a coke drum, then alternating temperature operation is carried out to heating furnace, and then control the outlet temperature of radiation chamber, first pass around the short time
Constant temperature, then continuously decrease temperature, the low temperature constant temperature for a period of time, temperature is then slowly increased, finally in high-temperature perseverance
Warm certain time.The alternating temperature operation of this elder generation's low temperature, rear high temperature, ensure that the reaction in coke drum can carry out in the liquid phase, makes
Interphase can grow up and convert very well, but it is excessively high to also bring along coke drum charge level, exchange heat condensing tower temperature fluctuation the problems such as, so
Extent of alternating temperature need to control in above-mentioned range.For alternating temperature operation three phases institute residence time, this with it is handled
There are relationship, those skilled in the art to be adjusted according to actual conditions for amount and matter of slurry oil etc., in the present invention
It is not specially limited.Joint oil, by high temperature, alternating temperature, for a long time stop, occurs the reactions such as cracking condensation, generates in coke drum
Needle coke and high-temperature oil gas.
In the above-mentioned methods, it is preferable that the joint oil of heat exchange condensing tower bottom of tower is the radiation chamber that point two-way enters heating furnace
's.
Specific implementation mode according to the present utility model, it is preferable that the above method is further comprising the steps of：Make heating furnace spoke
It penetrates the joint oil-in (can be two entrances) of room while injecting a certain amount of middle pressure steam, to improve joint oil in boiler tube
Flow velocity, prevent tube coking.It is highly preferred that the pressure of medium pressure steam is 3.5MPa.
In the above-mentioned methods, it is preferable that the flow of the middle pressure steam of heating furnace radiation chamber injection is 110-160kg/h.
In the above-mentioned methods, it is preferable that the tower top temperature of coke drum be 420 DEG C~450 DEG C, column bottom temperature be 350 DEG C~
380 DEG C, tower top pressure is 0.5MPa~0.7MPa.
In the above-mentioned methods, it is preferable that the temperature of the oil gas of heat exchange condensing tower evaporator section is overflowed and entered from coke column overhead
Degree is 420 DEG C~450 DEG C.
In the above-mentioned methods, it is preferable that then switch another after the froth bed of the coke drum of green coke reach a certain height
Coke drum carries out green coke, and the height that froth bed therein is reached is 15 meters~28 meters.
Specific implementation mode according to the present utility model, it is preferable that the above method is further comprising the steps of：In a coke
Before tower green coke, the coke drum is blown with steam first and catches up with air and pressure testing inspection, then introduces the coke column overhead produced
Oil gas carries out cycle preheating to the coke drum, the column bottom temperature of the coke drum is made to reach 330 DEG C.Wherein, the pressure of the steam
Preferably 1.3MPa.The oil condensed out after being preheated to the coke drum not produced with oil gas goes out device, can enter
General coke sump oil line.And when switching coke drum every time, it can be blown with steam and catch up with air and pressure testing inspection and use oil gas
Cycle preheating.
Specific implementation mode according to the present utility model, it is preferable that the above method is further comprising the steps of：When producing
The froth bed of coke drum reach a certain height, after stopping charging to the coke drum, backward should by decompression with 3.5MPa steam
It is blown in coke drum and catches up with oil gas.Steam blows the oil gas driven out of and goes out device, can be blown to general burnt blowdown system and carry out vent gas treatment.It is right
The pressure that 3.5MPa steam is reached after decompression is not specially limited, and those skilled in the art can carry out according to actual conditions
Adjustment.
In the above-mentioned methods, it is preferable that decoking is carried out to the coke drum that production terminates and is specifically included：To being deposited in coke drum
Interior needle coke is stripped, then after to water cooling, carries out hydraulic decoking.
In the above-mentioned methods, it is preferable that the oil gas that heat exchange condensation column overhead is overflowed is mixed oil and gas comprising diesel oil, vapour
The combination of one or more of oil and rich vapour etc..The mixed oil and gas can be detached after going out device into general burnt fractionating column,
Or enters general burnt blowdown system and carry out vent gas treatment.
In the above-mentioned methods, it is preferable that the pressure of the oil gas of heat exchange condensation column overhead is controlled in 0.3MPa~0.7MPa.
Specific implementation mode according to the present utility model, it is preferable that the above method is further comprising the steps of：Heat exchange is set to condense
After the part combination oil of tower bottom of tower is by recycling pumped, after being exchanged heat by slurry oil-joint oil heat exchanger and slurry oil, then into
Enter to exchange heat condensing tower evaporator section；And pumped in the case, is fed by radiation and enters the connection of the radiation chamber of heating furnace
Conjunction oil is part combination oil, this part combination is oily and is complete by the summation for combining oil that cycle pumped and slurry oil exchange heat
Portion's joint oil.
Needle coke process units provided by the utility model uses novel filter and constitutes feedstock pre-processing system, energy
So that the solid content of raw material slurry oil is dropped to 50ppm hereinafter, and available PLC automatically control, continuous production does not need filter core,
The impurity such as micro powder granule, the heavy metal of electromagnetic field " cylinder " adsorbable 99% periodically turn off electromagnetic field backwash " cylinder ".
The needle coke process units of the utility model uses the production form of two tower of a stove, and in the base of Conventional delayed coking technique
Heating furnace takes alternating temperature operation and control on plinth, ensure that larger recycle ratio and longer green coke period.In addition, this practicality is new
The heat exchange condensing tower of type itself establishes wax oil cycle and the extraction of a part of wax oil, is able to maintain that the normal heat of heat exchange condensing tower is flat
Weighing apparatus, it is ensured that the high circulation ratio of needle coke production；Meanwhile intermediate products wax oil is isolated by the condensing tower that exchanges heat, remaining bavin
The mixed oil and gas that oil, gasoline, rich vapour form can subsequently enter general burnt fractionating column and be detached, or enter general burnt blowdown system
Carry out vent gas treatment.Needle coke process units provided by the utility model can produce high-quality needle coke, this high-quality needle-shaped
Coke has an excellent properties such as electric-conductivity heat-conductivity high, low thermal coefficient of expansion, low fever's corrosion, and it is simple with technological process, can grasp
The property made is strong, is easy to the advantages that industrialized production.
Description of the drawings
Fig. 1 is the structure for the needle coke process units that one specific implementation mode of the utility model provides and the stream of production method
Cheng Tu.
Fig. 2 is the structure and process flow chart for the feedstock pre-processing system that one specific implementation mode of the utility model provides.
Fig. 3 is the structure chart for the filter that one specific implementation mode of the utility model provides.
Primary clustering symbol description：
Clarified oil surge tank 1, raw material pump 2, feedstock vapor heater 3, heating furnace 4, fuel gas liquid separation tank 5, coke drum 6,
Get rid of oil tank 7, get rid of oil pump 8, heat exchange condensing tower 9, radiation feed pump 10, wax oil pump 11, wax oil evaporator 12, vapor drum 13,
Wax oil cooler 14, circulating pump 15, slurry oil-joint oil heat exchanger 16, feedstock pre-processing system 17, filter 18, slurry oil input
Pipeline 19, recoil washing oil intake pipeline 20, recoil washing oil export pipeline 21, clarified oil export pipeline 22, protection gas intake pipeline
23, purification cleaning pipeline 24, urgent blowdown pipeline 25；
Upper port 181, bottom nozzle 182, side ports 183, electrode 184, high-voltage connection 185.
Specific implementation mode
In order to which the technical characteristics of the utility model, purpose and advantageous effect are more clearly understood, now to this practicality
Novel technical solution carry out it is described further below, but should not be understood as to the utility model can practical range restriction.
Embodiment 1
A kind of needle coke process units is present embodiments provided, as shown in Figure 1, it is included at least：Clarified oil surge tank 1,
Raw material pump 2, feedstock vapor heater 3, heating furnace 4, fuel gas liquid separation tank 5, coke drum 6, get rid of oil tank 7, get rid of oil pump 8, heat exchange it is cold
Solidifying tower 9, radiation feed pump 10, wax oil pump 11, wax oil evaporator 12, vapor drum 13, wax oil cooler 14, circulating pump 15,
Slurry oil-joint oil heat exchanger 16, feedstock pre-processing system 17；
The quantity of the coke drum 6 is two；
The clarified oil surge tank 1 is connected to the clarification oil-in of the convection cell of the heating furnace 4 by pipeline, and at this
Pipeline is provided with raw material pump 2 and feedstock vapor heater 3, and the clarification oil export of the convection cell of the heating furnace 4 passes through pipeline point
Two-way is connected to two clarification oil-ins of heat exchange 9 evaporator section of condensing tower；
The oil gas that the oil gas vent of 6 tower top of the coke drum is connected to heat exchange 9 evaporator section of condensing tower by pipeline enters
Mouthful, clarified oil exchanges heat with the oil gas from coke drum 6 in the heat exchange condensing tower 9；The oil gas of 6 tower top of the coke drum
Outlet is also connected to drop out line and curve of safe threshold by pipeline；
First joint oil export of 9 bottom of tower of the heat exchange condensing tower is connected to the radiation feed pump 10 by pipeline, then
It is divided to two of the radiation chamber joint oil-ins that two-way is connected to the heating furnace 4 by pipeline；
The wax oil outlet of heat exchange 9 oil sump tank of condensing tower is connected to the wax oil pump 11 by pipeline, then passes through pipe
Line divides two-way, is connected to the tower top of two coke drums 6 all the way, another way is connected to the entrance of the wax oil evaporator 12, described
Wax oil evaporator 12 is connected to the vapor drum 13, and the vapor drum 13 is connected with softened water feed-line,
The outlet of the wax oil evaporator 12 is connected to the first wax oil of heat exchange 9 tower top of condensing tower by three tunnels of pipeline point
The second wax oil reflux inlet below reflux inlet, heat exchange 9 oil sump tank of condensing tower and the wax oil cooler 14；
Second joint oil export of 9 bottom of tower of the heat exchange condensing tower is connected to the circulating pump 15 by pipeline, then passes through
Pipeline is connected to the joint oil loop head of heat exchange 9 evaporator section of condensing tower, and the slurry oil-joint oil heat exchanger 16 is set
It is placed on the pipeline that the circulating pump 15 is connect with the oily loop head of joint of heat exchange 9 evaporator section of condensing tower, and described
The pipeline that slurry oil-joint oil heat exchanger 16 enters feedstock pre-processing system 17 with conveying slurry oil is connect, and makes 9 bottom of tower of heat exchange condensing tower
Part combination oil by circulating pump 15 from bottom of tower extract out, through slurry oil-joint oil heat exchanger 16 and slurry oil heat exchange after return exchange heat it is cold
Solidifying tower 9；
The tower top of the heat exchange condensing tower 9 is additionally provided with oil gas vent；
The joint oil export of the radiation chamber of the heating furnace 4 is connected to two coke drums by pipeline and four-way valve
6；The four-way valve is connected with 1.3MPa steam by threeway on oil feed-line with connected the combining of a certain coke drum 6 and water is defeated
Pipeline is sent, is blown with steam for the coke drum 6 to not produced and catches up with air and pressure testing inspection, and for production end
The needle coke accumulated in coke drum 6 is stripped, to water cooling and hydraulic decoking；Two 6 tower tops of coke drum are preheated by oil gas
Pipeline is connected, and after blowing through steam and air and pressure testing to be caught up with to check in the coke drum 6 not produced, introduces and is giving birth to it
The oil gas of 6 tower top of coke drum of production, and then cycle preheating is carried out to the coke drum not produced 6；The four-way valve and certain
One end of cold oil export pipeline is connected on the oily feed-line of joint that one coke drum 6 is connected by threeway, the cold oil is defeated
Go out pipeline the other end be connected to it is described get rid of oil tank 7, it is described get rid of oil tank 7 by pipeline be connected to it is described get rid of oil pump 8, for that will adopt
The oil condensed out after being preheated to the coke drum 6 not produced with oil gas transfers out device, into general burnt sump oil line；Institute
It states four-way valve and is also associated with 3.5MPa steam pipelines, for after certain coke drum 6 terminates production, being passed through with 3.5MPa steam
It is blown in the backward coke drum 6 of decompression and catches up with oil gas；The tower top of the coke drum 6 is also associated with steam output pipe line, is used for coke
Steam (including steam etc. after the stripping) output of 6 tower top of tower enters hot-tub；
The heating furnace 4 is additionally provided with fuel gas entrance, and the fuel gas entrance is connected to the fuel qi leel by pipeline
Flow container 5；Two joint oil-ins of the radiation chamber of the heating furnace 4 are also associated with middle pressure steam intake pipeline, make heating furnace spoke
It penetrates two joint oil-ins of room while injecting a certain amount of 3.5MPa middle pressure steams, to improve stream of the joint oil in boiler tube
Speed prevents tube coking；
The feedstock pre-processing system 17 is used to make slurry oil, and (slurry oil is to exchange heat with the oil of combining of 9 bottom of tower of heat exchange condensing tower
Slurry oil afterwards) through the feedstock pre-processing system 17 processing after obtain clarified oil, obtained clarified oil enter the clarified oil delay
Rush tank 1；As shown in figure 3, the feedstock pre-processing system 17 includes at least：Two filters 18, slurry oil intake pipeline 19, recoil
Washing oil intake pipeline 20, recoil washing oil export pipeline 21, clarified oil export pipeline 22；Two filters 18 are connected by pipeline parallel connection
It connects, the slurry oil intake pipeline 19 is connected to the slurry oil feed(raw material)inlet on 18 top of each filter, the recoil by pipeline
Washing oil intake pipeline 20 is connected to the backwash oil-in of 18 bottom of each filter, the recoil washing oil output by pipeline
Pipeline 21 is connected to the backwash oil export on 18 top of each filter by pipeline, and the one of the clarified oil export pipeline 22
End is connected to the clarification oil export of 18 bottom of each filter by pipeline, and the other end of the clarified oil export pipeline 22 connects
It is connected to the clarified oil surge tank 1；Wherein, the clarification oil export and the backwash oil-in are same port；
As shown in Fig. 2, the filter 18 is a hollow cylinder, the top of the cylinder sets that there are two upper ports
181, respectively slurry oil feed(raw material)inlet and backwash oil export, the bottom of the cylinder set that there are one bottom nozzle 182 and a sides
Port 183, the bottom nozzle 182 are that backwash oil-in and clarification oil export (backwash oil-in and clarification oil export are public
One bottom nozzle 182), the side ports 183 are sewage draining exit, which is internally provided with an electrode 184, which is connected with
One high-voltage connection 185；
Wherein, the thermic load of the heating furnace is 3.5-10MW；
A diameter of 5400-8800mm of the coke drum；
A diameter of 1400-2600mm of the heat exchange condensing tower.
In addition, as shown in figure 3, the feedstock pre-processing system can also include：Protect gas intake pipeline 23, the protection
Gas intake pipeline 23 is connected to the recoil washing oil intake pipeline 20 and the clarified oil export pipeline 22 by pipeline, uses
The remaining oil gas in pipeline and filter is purged in being passed through protection gas, ensures safety.In addition, the pretreatment of raw material system
Uniting to include：Purification cleaning pipeline 24, the purification cleaning pipeline 24 are connected to 18 bottom of each filter by pipeline
The backwash oil-in in portion, for being rinsed to filter using other media.In addition, the feedstock pre-processing system may be used also
To include：Urgent blowdown pipeline 25, the urgent blowdown pipeline 25 are connected to the clear of 18 bottom of each filter by pipeline
Edible vegetable oil exports, in emergency circumstances moving back oil.
Embodiment 2
A kind of needle coke production method is present embodiments provided, the device for using embodiment 1 to provide, this method is at least wrapped
Include following steps：
Make slurry oil (slurry oil is slurry oil combine after oil heat exchange with heat exchange condensing tower 9 bottom of tower) by pretreatment of raw material system
Filter 18 in system 17 is filtered, while 3.5~40,000 volts of voltage is introduced by the high-voltage connection 185 in filter 18,
Electromagnetic field " cylinder " is formed in filter 18, the impurity in slurry oil is adsorbed, obtains clarified oil, into clarified oil surge tank 1, oil
Slurry is through the pressure difference ＜ 0.45MPa before and after the processing of feedstock pre-processing system 17；And to used filter 18 with recoil washing oil into
Row cleaning makes recoil washing oil enter in used filter 18 through backwash oil-in and is cleaned, the backwash after cleaning
Oil is from backwash oil export discharge, and the impurity washed out is discharged from sewage draining exit, and two filters 18 are a pair, one of work
Another cleaning；Clarified oil is set to pass through feedstock vapor heater 3 and heating furnace 4 by raw material pump 2 from clarified oil surge tank 1
Convection cell, divide two-way enter heat exchange 9 evaporator section of condensing tower, make 6 tower top of coke drum overflow oil gas enter heat exchange condensing tower 9
Evaporator section, clarified oil exchanges heat with the oil gas from coke drum 6 in the condensing tower 9 that exchanges heat, and the wax oil in clarified oil is with the following group
Enter 9 bottom of tower of heat exchange condensing tower point together with the recycle oil being condensed in oil gas, forms connection and oil；
Make the part joint oil of 9 bottom of tower of heat exchange condensing tower by radiating the extraction of feed pump 10 and two-way being divided to enter heating furnace
4 radiation chamber after so that joint oil is heated up in heating furnace 4, enters a coke drum 6, joint oil is in the coke by four-way valve
Reaction generates needle coke in tower 6 and oil gas, needle coke are deposited in 6 tower of coke drum, and the oil gas overflows from 6 tower top of coke drum
Go out；After the froth bed of the coke drum 6 reaches 15 meters~28 meters of height, then the joint oil after heating is set to enter by four-way valve another
One coke drum 6, and the coke drum 6 terminated to production devokes, two 6 rotation green cokes of coke drum；
Before 6 green coke of coke drum, the coke drum 6 is blown with 1.3MPa steam first and catches up with air and pressure testing inspection, then
The oil gas for introducing 6 tower top of coke drum produced, carries out cycle preheating to the coke drum 6, makes the column bottom temperature of the coke drum 6
Reach 330 DEG C, the oil condensed out after being preheated to the coke drum 6 not produced with oil gas goes out device, can enter general
Burnt sump oil line；And when switching coke drum 6 every time, it can be blown with steam and catch up with air and pressure testing inspection and followed with oil gas
Ring preheats；
When the froth bed of the coke drum 6 produced reaches above-mentioned height, after stopping charging to the coke drum 6, use
3.5MPa steam catches up with oil gas by being blown in the backward coke drum 6 of decompression, and steam blows the oil gas driven out of and goes out device, can be blown to general coke
Blowdown system carries out vent gas treatment；
And it carries out decoking to the coke drum 6 that production terminates to specifically include：The needle coke being deposited in coke drum 6 is carried out
Stripping, then after to water cooling, carry out hydraulic decoking；
Two of 4 radiation chamber of heating furnace are made to combine oil-in while injecting a certain amount of 3.5MPa middle pressure steams, to improve
Flow velocity of the joint oil in boiler tube, it is 110-160kg/h to prevent tube coking, steam injection flow；
Make the wax oil of 9 oil sump tank of heat exchange condensing tower by 11 extraction of wax oil pump, a part enters the tower top of coke drum 6, uses
In controlling 6 tower top temperature of coke drum as quench oil, another part enters wax oil evaporator 12, divides three after exchanging heat with softened water
Road respectively enters heat exchange 9 tower top of condensing tower as upper reflux, 9 oil sump tank of heat exchange condensing tower lower section as lower reflux and entrance
Wax oil cooler 14 goes out device after cooling；Heat exchange condensing tower 9 establishes wax oil cycle and the extraction of a part of wax oil, is able to maintain that
The normal thermal balance of heat exchange condensing tower, it is ensured that the high circulation ratio of needle coke production；
After so that another part of 9 bottom of tower of heat exchange condensing tower is combined oil by the extraction of circulating pump 15, changed by slurry oil-joint oil
After hot device 16 is exchanged heat with slurry oil, heat exchange 9 evaporator section of condensing tower is entered back into；And by radiating the extraction of feed pump 10 and entering
The joint oil of the radiation chamber of heating furnace 4, and oily summation is combined for all with what slurry oil exchanged heat by the extraction of circulating pump 15
Joint oil；Slurry oil after heat exchange enters feedstock pre-processing system 17 and is pre-processed；
So that the oil-air pressure that 9 tower top of heat exchange condensing tower overflows is controlled and go out device in 0.3MPa~0.7MPa, which is mixed
Closing oil gas comprising diesel oil, gasoline and rich vapour etc., the mixed oil and gas can be detached after going out device into general burnt fractionating column,
Or enters general burnt blowdown system and carry out vent gas treatment；
Wherein, the temperature of the clarified oil from clarified oil surge tank 1 out is 60 DEG C~140 DEG C, and density is >=1.00g/
cm3(20 DEG C), solid content are≤0.5% (mass fraction)；
The temperature for entering the clarified oil of heat exchange 9 evaporator section of condensing tower by the convection cell of heating furnace 4 is 300 DEG C~320 DEG C；
The temperature that the oil gas of heat exchange 9 evaporator section of condensing tower is overflowed and entered from 6 tower top of coke drum is 420 DEG C~450 DEG C；
The temperature of connection and oil after heating up in heating furnace 4 is 450 DEG C~530 DEG C；
The clarified oil outlet temperature of the convection cell of heating furnace 4 is 300 DEG C~320 DEG C, and clarified oil outlet pressure is 0.7MPa
The fire box temperature of~0.9MPa, convection cell are 700 DEG C~750 DEG C；
The joint oil export temperature of the radiation chamber of heating furnace 4 is 450 DEG C~530 DEG C, and the fire box temperature of radiation chamber is 800
DEG C~850 DEG C, the joint oil-in pressure of radiation chamber is 2.5MPa~3MPa, and joint oil export pressure is 0.7MPa~1MP；
And heating furnace 4 is operated using alternating temperature, specifically includes three phases, respectively constant temperature stage, cooling-constant temperature rank
Section, heating-constant temperature stage；Wherein the radiation chamber outlet temperature in constant temperature stage is 480 DEG C~550 DEG C；Cooling-constant temperature stage is first
For a period of time, the radiation chamber outlet temperature in cooling-constant temperature stage is 420 DEG C~480 DEG C to constant temperature again for cooling；Heating-constant temperature stage
First to heat up again constant temperature for a period of time, the radiation chamber outlet temperature in heating-constant temperature stage is 480 DEG C~550 DEG C；
The tower top temperature of coke drum 6 is 420 DEG C~450 DEG C, and column bottom temperature is 350 DEG C~380 DEG C, and tower top pressure is
0.5MPa~0.7MPa.
In the above-mentioned methods, used raw material slurry oil is the intermediate material of refinery catalytic cracking unit, i.e. catalytic slurry,
Quality index is that solid content of oil slurry is 1000ppm~5000ppm.
The quality index for the needle coke that the present embodiment is prepared is volatile matter<12% (mass fraction), ash content<0.3%
(mass fraction).Green coke resistivity without calcining is very high, and close to insulator, after calcining, resistivity drastically declines, stone
The resistivity of oil coke is inversely proportional with calcination temperature, and the resistivity of the needle coke through 1300 DEG C of burnt the present embodiment is reduced to
500 μ Ω m or so.The petroleum coke ash content of production graphite product generally should be smaller than 0.5%, needle coke manufactured in the present embodiment
Ash content meets the requirements.The normal temperature for testing petroleum coke coefficient of thermal expansion is 100~600 DEG C, the knot of the different gained of test temperature
Fruit cannot directly compare, the coefficient of expansion of the needle coke of the present embodiment production, reach domestic same in different test temperature Duan Jun
The optimal value of class product.As it can be seen that the needle coke that the present embodiment is prepared is high-quality needle coke.
Claims (10)
1. a kind of needle coke process units, which is characterized in that the device includes at least：Clarified oil surge tank, raw material pump, heating
Stove, coke drum, heat exchange condensing tower, radiation feed pump, wax oil pump, wax oil evaporator, wax oil cooler；
The quantity of the coke drum is two；
The clarified oil surge tank is connected to the clarification oil-in of the convection cell of the heating furnace by pipeline, and on the pipeline
It is provided with the raw material pump, the clarification oil export of the convection cell of the heating furnace is connected to the heat exchange condensing tower by pipeline
The clarification oil-in of evaporator section；
The oil gas vent of the coke column overhead is connected to the oil gas entrance of the evaporator section of the heat exchange condensing tower by pipeline,
Clarified oil exchanges heat with the oil gas from coke drum in the heat exchange condensing tower；
First joint oil export of the bottom of tower of the heat exchange condensing tower is connected to the radiation feed pump by pipeline, then passes through pipe
Line is connected to the joint oil-in of the radiation chamber of the heating furnace；The joint oil export of the radiation chamber of the heating furnace passes through pipeline
It is connected to two coke drums with four-way valve；
The wax oil outlet of the oil sump tank of the heat exchange condensing tower is connected to the wax oil by pipeline and pumps, and is then divided to two by pipeline
Road, is connected to the tower top of two coke drums all the way, and another way is connected to the entrance of the wax oil evaporator, the wax oil evaporator
Outlet the first wax oil reflux inlet of tower top of the condensing tower that exchanges heat, the heat exchange are connected to by pipeline point three tunnels
The second wax oil reflux inlet below the oil sump tank of condensing tower and the wax oil cooler；
The heating furnace is additionally provided with fuel gas entrance；
The tower top of the heat exchange condensing tower is additionally provided with oil gas vent.
2. needle coke process units according to claim 1, which is characterized in that described device further includes：Pretreatment of raw material
System, for making slurry oil obtain clarified oil after feedstock pre-processing system processing, obtained clarified oil enters the clarification
Oily surge tank；
The feedstock pre-processing system includes at least：It is even number filter, slurry oil intake pipeline, recoil washing oil intake pipeline, anti-
Flushing oil export pipeline, clarified oil export pipeline；The even number filter is connected in parallel by pipeline, the slurry oil input pipe
Line is connected to the slurry oil feed(raw material)inlet on each filter top by pipeline, and the recoil washing oil intake pipeline passes through pipeline point
It is not connected to the backwash oil-in of each filter bottom, the recoil washing oil export pipeline is connected to each mistake by pipeline
One end of the backwash oil export on filter top or bottom, the clarified oil export pipeline is connected to each filtering by pipeline
The other end of the clarification oil export on device top or bottom, the clarified oil export pipeline is connected to the clarified oil surge tank；Its
In, when the recoil washing oil export pipeline is connected to the backwash oil export on each filter top by pipeline, then institute
State the clarification oil export that clarified oil export pipeline is connected to each filter bottom by pipeline, and the clarification oil export
It is same port with the backwash oil-in；When the recoil washing oil export pipeline is connected to each filter by pipeline
When the backwash oil export of bottom, then the clarified oil export pipeline is connected to the clarification on each filter top by pipeline
Oil export, and the backwash oil export and the backwash oil-in are same port.
3. needle coke process units according to claim 2, which is characterized in that the filter is a hollow cylinder,
The top of the cylinder is set there are two port, respectively slurry oil feed(raw material)inlet and backwash oil export or clarification oil export, the column
The bottom of body is set there are one bottom nozzle and a side ports, when one of upper port of the cylinder is backwash oil export, then
The bottom nozzle of its bottom is backwash oil-in and clarification oil export, when one of upper port of the cylinder is clarification oil export
When, then the bottom nozzle of its bottom is backwash oil-in and backwash oil export, and the side ports of the cylinder bottom are sewage draining exit, should
Cylinder is internally provided with an electrode, which is connected with a high-voltage connection.
4. needle coke process units according to claim 1, which is characterized in that the thermic load of the heating furnace is 3.5-
10MW。
5. needle coke process units according to claim 1, which is characterized in that the joint oil of the radiation chamber of the heating furnace
Entrance is also associated with middle pressure steam intake pipeline, makes the joint oil-in of heating furnace radiation chamber while injecting a certain amount of middle pressure steaming
Vapour prevents tube coking to improve flow velocity of the joint oil in boiler tube.
6. needle coke process units according to claim 1, which is characterized in that a diameter of 5400- of the coke drum
8800mm。
7. needle coke process units according to claim 1, which is characterized in that described device further includes：1.3MPa steam
And water feed-line, oil gas preheat pipeline, cold oil export pipeline, get rid of oil tank, get rid of oil pump, the four-way valve and a certain coke drum
The 1.3MPa steam and water feed-line are connected with by threeway on the oily feed-line of connected joint, for not carrying out
The coke drum of production is blown with steam catches up with air and pressure testing inspection, and the needle coke accumulated in the coke drum for terminating to production
It is stripped, to water cooling and hydraulic decoking；
Two coke column overheads preheat pipeline by the oil gas and are connected, for being blown through steam in the coke drum not produced
After catching up with air and pressure testing to check, the oil gas of the coke column overhead produced is introduced to it, and then this is not produced
Coke drum carries out cycle preheating；
The cold oil efferent duct is connect by threeway on the joint oil feed-line that the four-way valve is connected with a certain coke drum
One end of line, the other end of the cold oil export pipeline be connected to it is described get rid of oil tank, the oil tank that gets rid of is connected to by pipeline
It is described to get rid of oil pump, for the oil for using oil gas to be condensed out after being preheated to the coke drum not produced to be transferred out dress
It sets, into general burnt sump oil line.
8. needle coke process units according to claim 1, which is characterized in that described device further includes：3.5MPa steam
Feed-line is connected to the four-way valve, for after certain coke drum terminates production, it is backward to pass through decompression with 3.5MPa steam
It is blown in the coke drum and catches up with oil gas.
9. needle coke process units according to claim 1, which is characterized in that a diameter of of condensing tower that exchange heat
1400-2600mm。
10. needle coke process units according to claim 1, which is characterized in that described device further includes：Slurry oil-joint
Second joint oil export of oil heat exchanger, circulating pump, the bottom of tower of the heat exchange condensing tower is connected to the circulating pump by pipeline,
The joint oil loop head of the evaporator section of the heat exchange condensing tower is connected to by pipeline again, and the slurry oil-joint oil changes
Hot device is set on the pipeline that the circulating pump is connect with the oily loop head of joint of the evaporator section of the heat exchange condensing tower, and
The pipeline that the slurry oil-joint oil heat exchanger enters feedstock pre-processing system with conveying slurry oil is connect, and makes the tower of heat exchange condensing tower
The part combination oil at bottom is extracted out by circulating pump from bottom of tower, and heat exchange condensation is returned after slurry oil-joint oil heat exchanger and slurry oil heat exchange
Tower.
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| CN201820003210.XU CN207973707U (en) | 2018-01-02 | 2018-01-02 | A kind of needle coke process units |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108219839A (en) * | 2018-01-02 | 2018-06-29 | 中和亚通能源科技有限公司 | A kind of needle coke production method and device |
| CN109233885A (en) * | 2018-10-26 | 2019-01-18 | 重庆润科新材料技术有限公司 | A kind of needle coke process units |
| CN111925814A (en) * | 2020-07-22 | 2020-11-13 | 山东益大新材料股份有限公司 | Delayed coking system and method for producing coal-series and oil-series needle coke in time-sharing manner |
-
2018
- 2018-01-02 CN CN201820003210.XU patent/CN207973707U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108219839A (en) * | 2018-01-02 | 2018-06-29 | 中和亚通能源科技有限公司 | A kind of needle coke production method and device |
| CN108219839B (en) * | 2018-01-02 | 2024-04-09 | 亚通石化集团有限公司 | Needle coke production method and device |
| CN109233885A (en) * | 2018-10-26 | 2019-01-18 | 重庆润科新材料技术有限公司 | A kind of needle coke process units |
| CN111925814A (en) * | 2020-07-22 | 2020-11-13 | 山东益大新材料股份有限公司 | Delayed coking system and method for producing coal-series and oil-series needle coke in time-sharing manner |
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Address after: Unit 8-10, 8th floor, building 2, yard 16, Tianze Road, Chaoyang District, Beijing 100125 Patentee after: Zhonghe Yutong Energy Group Co.,Ltd. Address before: Unit 8-10, 8th floor, building 2, yard 16, Tianze Road, Chaoyang District, Beijing 100125 Patentee before: ZHONGHE YATONG ENERGY TECHNOLOGY Co.,Ltd. |
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Address after: Room 2803, 2801, floor 28, building 1, yard 8, Beichen East Road, Chaoyang District, Beijing 100101 Patentee after: Yatong Petrochemical Group Co.,Ltd. Address before: Unit 8-10, 8th floor, building 2, yard 16, Tianze Road, Chaoyang District, Beijing 100125 Patentee before: Zhonghe Yutong Energy Group Co.,Ltd. |
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