EP3259334A1 - Dispositif et procédé pour la séparation d'asphaltènes d'un combustible contenant de l'huile - Google Patents

Dispositif et procédé pour la séparation d'asphaltènes d'un combustible contenant de l'huile

Info

Publication number
EP3259334A1
EP3259334A1 EP16706992.1A EP16706992A EP3259334A1 EP 3259334 A1 EP3259334 A1 EP 3259334A1 EP 16706992 A EP16706992 A EP 16706992A EP 3259334 A1 EP3259334 A1 EP 3259334A1
Authority
EP
European Patent Office
Prior art keywords
container
particles
asphaltenes
asphaltene
asphaltene particles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16706992.1A
Other languages
German (de)
English (en)
Inventor
Markus Kinzl
Ansgar Kursawe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP3259334A1 publication Critical patent/EP3259334A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
    • C10G21/003—Solvent de-asphalting
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/20—Characteristics of the feedstock or the products
    • C10G2300/201—Impurities
    • C10G2300/205—Metal content
    • C10G2300/206—Asphaltenes

Definitions

  • the invention relates to a device for separating asphaltenes from an oil-containing fuel. Furthermore, the invention relates to a corresponding method for the separation of asphaltenes from an oil-containing fuel.
  • oily fuels such as crude and heavy oils
  • crude and heavy oils which are available as low-cost fuels for energy production by gas turbines.
  • asphaltenes which in turn contain chemically bound heavy metals.
  • heavy metals such as vanadium or nickel are released as metal oxides.
  • the Me ⁇ -metal oxides alloyed with the metals of the turbine blades and corrode and weaken.
  • asphaltenes have the property of precipitating as a solid under severe pressure or temperature changes. These solid asphalt particles can influence lines or fine nozzles of the torch used clog fen and the mixture formation in the turbine, whereby the efficiency of the turbine is marlose ⁇ lert.
  • oils containing vanadium are added with an inhibitor which prevents alloying of the metal oxides with the metal of the turbine blade.
  • a refractory Magnesiumvanadat forms instead of low melting Alkalivanadate.
  • the deposits or type of connection must crusts are removed from the turbine blades, which requires a regular time-consuming and costly service effort. In particular, such a cleaning is associated with a turbine stoppage of several hours.
  • deasphalting processes are known, which are based on an extraction of asphaltenes with saturated aliphatic hydrocarbons as precipitants.
  • these asphaltene reduction methods are only used in the refinery sector.
  • the use in a power plant environment is not effective since, for example providing for "classical" deasphalting means of the so-called ROSE process an asphalt extraction with low-molecular Ali triphosphates, which require residence times partially to meh ⁇ eral hours.
  • ROSE- Process an asphalt extraction with low-molecular Ali triphosphates, which require residence times partially to meh ⁇ eral hours.
  • Such a deasphalting is just at ROSE- Process associated with high temperatures and pressures in the "critical" range of solvents.
  • Specify device by means of which the Asphaltenabschei- tion can be achieved from an oil-containing fuel efficiently and inexpensively.
  • a second object of the invention is to provide a method that allows a correspondingly simple and kos ⁇ ten montene separation.
  • the first object of the invention is inventively achieved by a device for the removal of asphaltenes from an oil-containing fuel comprising a mixing element for intensive in ⁇ mixing of the oil-containing fuel with an solu- solvents to form a supersaturated with asphaltenes solution, a container for desupersaturation by deposition of the asphaltenes from the supersaturated solution, a growing zone formed inside the container for growing asphaltene particles through the asphaltenes separated from the supersaturated solution, and a fluidically connected classifier for separating the asphaltene particles grown in the growth zone into their particle size according to, wherein the Benzol ⁇ ter is designed and arranged such that a
  • Asphaltene particles containing stream between the Mischele ⁇ ment and the growth zone of the container circulates.
  • the invention faces two fundamental problems that arise in the precipitation of asphaltenes from an oily fuel.
  • On the one hand there is the risk of uncontrolled early precipitation of asphaltene particles in the addition of precipitants or solvents, as is customary in the case of deasphalting, since the solvents used in the deasphalting and the respective oil-containing fuels are not completely miscible.
  • the phase interface which arises despite the mixing, favors the spontaneous and uncontrolled precipitation of the
  • Asphaltenes The particles formed in a precipitation are usually ultrafine particles whose separation from the respective mother solution, that is to say in the present case the oil-containing fuel, is scarcely possible. This gives rise to the second problem. Available to the precipitated fines growth nuclei or correspondingly large upper surfaces ⁇ available, then the particles separate out there. With regard to the devices used for deasphalting, these surfaces are provided by the walls of the individual device components or by growth nuclei contained in the fuel, at which the asphaltene particles deposit and grow. This applies ever ⁇ but in terms of unwanted deposits and blockages, called fouling, and to prevent the associated From ⁇ effects on a downstream gas turbine process.
  • the invention now recognizes that precipitation and separation for the subsequent separation of the asphaltene particles from the oil-containing fuel can be implemented in a controlled manner, especially when rapid mixing takes place in combination with a targeted provision of growth nuclei.
  • the device used for the separation comprises for this purpose a mixing element for intensive mixing of the oil-containing fuel with a solvent to form a
  • Asphaltene supersaturated solution and a container to reduce supersaturation by deposition of asphaltenes from the supersaturated solution Within the vessel, a wax ⁇ tumszone is formed separated in the existing asphalt particles by the from the supersaturated solution
  • the container is in this case such forms ⁇ out and arranged such that a circulating asphalt particles contained ⁇ tender flow between the mixing element and the growth zone of the container.
  • the stream containing the asphaltene particles circulates here between the mixing element and the growth zone in such a way that the volume elements contained in the asphaltene particles pass through both the growth zone and the mixing element several times.
  • existing particles preferentially enlarge instead of forming the new microfine particles.
  • the particles accumulate within the container and can then be separated from the oil-containing fuel by the classifier connected to the container according to their particle size.
  • a mixing pump is used as the mixing element, which has a high shear rate.
  • the asphaltene particles present in the mixing zone or at the mixing point as a result of the circulation of the stream, the asphaltenes which precipitate out of the solution can deposit thereon and grow there.
  • the supersaturation of the solution can thus be reduced in a controlled manner thanks to the presence of the asphaltene particles present in the stream.
  • the growth of asphaltene particles continues within the container.
  • the particles may grow so far that they Errei ⁇ chen the desired particle size for separation.
  • the separation of the particles takes place via the classifier connected to the container.
  • the fuel to be purified by asphaltenes is, in particular, a heavy oil whose main constituents, in addition to the asphaltenes (highly condensed aromatic hydrocarbons), are above all alkanes, alkenes, cycloalkanes. In addition there alipha ⁇ tables and heterocyclic nitrogen and Schwefelverbin ⁇ decisions occur.
  • Suitable solvents are in particular short-chain hydrocarbons, such as butanes (C4), pentanes (C5), hexanes (C6) and / or heptanes (C7).
  • the solvent in this case serves to dissolve soluble constituents contained in the oil-containing fuel, for example aliphatics.
  • the asphaltenes contained in the oil-containing fuel are insoluble in the solvent used, so that the solvent respect ⁇ Lich of the asphaltenes can be ⁇ is characterized as a sort of an "anti-solvent".
  • a supply line for the oil-containing fuel and / or a supply line for the solvent are connected to the mixing element. If both supply lines are connected to the mixing element, the two components are mixed directly in the mixing element. Such an staltung is particularly preferred because of ensuring fast and good mixing.
  • the container itself is in particular designed such that it allows a sufficiently large residence time for the growth of the asphaltene particles.
  • the required for the separation solids accumulation is ensured in the container.
  • the precipitated asphaltene particles continue to grow before their separation.
  • the growth will be affected by the balance between the quantity of the lingering in the loading container ⁇ particles and the amount of circulating particles or limited.
  • the higher the residence time the higher the deposition rate and thus, due to the improved separation, the cleaning performance of the device used for the separation.
  • the zone such is understood ⁇ , in which the asphalt particles grow by the deposition of white ⁇ more excellent asphaltenes from the mixture, thus the supersaturated solution.
  • the growth zone may in this case be limited to a volume within the container. Alternatively, the entire container volume as a growth zone for the
  • Asphaltene particles are available.
  • Classifier connected. The separation takes place here according to the particle size, with small and large
  • the classifier ⁇ device preferably comprises for this purpose a number of
  • the average diameter of the separated particles is in this case, for example, depending on the oil used, the set separation grain size and the speed of the asphalt profundsge ⁇ particles.
  • the desired accumulation of asphaltene particles in the container can be achieved.
  • the amount of solids present in the container which can be achieved by the targeted control of the two partial streams taken from the container, the desired adaptation of the available surface to the process requirements is possible.
  • the particles Due to the particle growth within the container and the associated increasing accumulation of particles and the available surface decreases the required volume of the container.
  • the particles in this case have a ⁇ interpreting Lich higher residence time and thus growth within the container as the liquid flowing through, whereby large and well-separable particle arise.
  • due to the accumulation of solids within the container it is possible to specify different residence times for the liquid and the solid.
  • the requirements for the growth time of the solid particles, as well as the short remplisstechniksverweilzeit which allows the use of a container of small size, glei ⁇ che impart taken into account.
  • the available surface for the Parti ⁇ kelwachstum is also about 3 times greater.
  • the volume-specific separation capacity (kg of asphaltenes / hm 3 ) of the container increases by a factor of 3, so that the container volume can be reduced by a factor of 3 with the same separation performance compared to non-successful particle enrichment with a low residence time.
  • a particle enrichment within the container or within the corresponding growth zone allows the use of a container with structurally smaller dimensions.
  • small asphaltene particles in the present case are understood as meaning those particles which have not yet grown sufficiently to be able to be retained by a classifier, ie kept in the process.
  • the hyd ⁇ rodynamische residence time is about 1 ⁇ .
  • the mean diameter of the small asphaltene particles is typically below 5 ⁇ m.
  • Large asphaltene particles are understood to be the particles which, owing to their significantly larger average diameter, can be easily separated off by the classifier and fed to a further utilization as a solid.
  • such isolated as large asphalt particles whose mittle ⁇ rer diameter is above 25 ym.
  • the mixing element and the growth zone of Be ⁇ boders circulating stream preferably contains asphaltene particle medium size.
  • the current-saving circuiate ⁇ asphalt particles having an average diameter containing in a range between 5 .mu.m and 20 .mu.m.
  • the amount of asphaltene particles circulating in the partial flow is through the residence time in the container - depending on the classification of the particles - determined.
  • the specified particle sizes of the small, medium and large asphaltene particles are not limited to the ranges indicated.
  • the desired residence time within the vessel or within the growth zone and to clean ⁇ constricting oil-containing fuel the particle sizes of the designated values or the area may be different.
  • the medium-sized asphalt particles flow from the wax ⁇ tumszone the mixing element to stand there as growth nuclei for the deposited from the mixture asphaltenes available.
  • the mixing element of the stream is mixed with a solvent and the oily ⁇ set to be cleaned fuel. Those contained in the mixture
  • a two-stage classifier ie a classifier with two separation stages
  • the separation stages preferably small and large asphaltene particles are separated from one another and at the same time from the "mother solution", ie the mixture of fuel and solvent.
  • the circulation of the asphaltene particle-containing stream is achieved in an advantageous embodiment of the invention via a fluidic connection of the mixing element with the container.
  • the container for circulating the asphaltene particle-containing stream is expediently fluidly connected to the mixing element.
  • About this fluidic connection containing the asphaltene particles stream is supplied from the container to the mixing element and mixed here with oily fuel and solvent.
  • the resulting mixed stream is fed to the container, for which purpose the mixing element is preferably fluidly connected via a discharge line to a supply line of the container.
  • the asphaltene particles contained in the mixed flow grow.
  • the large asphaltene particles are separated off.
  • Small particles are ⁇ carry out the oil flow.
  • the stream containing essentially asphalt particle medium size is again ge ⁇ leads into the mixing element.
  • the latter is preferably connected via a discharge line in terms of flow to a supply line of the mixing element.
  • the stream supplied from the container to the mixing element is mixed again within the mixing element with the freshly supplied oily fuel and the solvent.
  • the asphaltene particles contained in the stream serve as growth nuclei. They provide the surface necessary for growing the asphaltene particles. This is where a large part of the mix, so the Asphal ⁇ tenpelle containing stream, out repeatedly in a loop.
  • the amounts of each circulating streams can be described by mass flow conditions.
  • a mass flow is the mass of a medium which moves through a cross-section per unit of time.
  • the mass flow ratio between the asphalt particles is preferably containing stream and the mixed stream (me sum of the feed streams of the oil containing fuel and Lö ⁇ sungsstoffs) is considered.
  • the ratio of the flow supplied by the container to the mixing element to the sum of the inlet flow Depending on the concentration of solids present, it is preferably in a range between 0.1: 1 to 100: 1.
  • a lower ratio of the mass flows can be set with a higher solids concentration.
  • a low mass flow ratio is desirable, in particular due to cost reasons, since higher KreislaufVer conception ⁇ nisse require larger pumps and larger pipe diameter, which are recorded pressure losses.
  • a mass flow ratio in a range between 10: 1 and 10: 5 is advantageous here. Particularly preferred is a mass flow ratio of 10: 1.
  • a ratio of 10: 1 be ⁇ indicated that the mass of the asphalt particle-containing stream flowing in the direction of the mixing element, times greater than about 10, the sum of the feed streams of the oil containing fuel and the solvent to the mixing element.
  • An alternative embodiment of the invention provides that the mixing element is arranged within the container.
  • the mixing element In the arrangement of the mixing element within the container ⁇ which the oil-containing fuel and the solvent via ent ⁇ speaking leads dosed into the container, where they are mixed vice ⁇ starting intensive.
  • a mixing element is preferably used, which operates on the rotor-stator principle and has a high shear rate. Also possible here is the use of a mixing pump whose static part is arranged, for example, on the wall of the container.
  • the mixing is preferably carried out in a so-called mixing zone or at a mixing point within the container.
  • the mixing zone is expediently located in the vicinity of the container wall, so that thorough mixing takes place immediately after inflow of the feed streams, ie of the oil-containing fuel and the solvent, to form a supersaturated solution.
  • the mixture flows through a suitable flow guide within the container in the growth zone of the container where the asphaltenes precipitate. As growth germs they are also available here in the container asphaltene particles available.
  • the circulation of the asphalt particles containing stream between the wax ⁇ tumszone the container and the mixing element is carried out. Overall, circulation of an asphaltene-containing stream between the growth zone of the container and the mixing element - regardless of whether the mixing element is formed as a separate component or disposed within the Benzol ⁇ ters - provide a provision for the
  • Deasphalting of an oil-containing fuel required large surface area for selective separation of the asphaltenes and at the same time prevention of crust formation by fouling.
  • the asphaltene particles grown within the growth zone of the container undergo a separation of their particle size.
  • By the connected to the container classifying a targeted enrichment of solids Parti ⁇ angles is possible, which increases the deposition rate and thus the cleaning ⁇ cleaning performance in the separation.
  • a classifier which includes several separation stages, so as to achieve the best ⁇ g ⁇ lichster separation performance.
  • the term separation stage is to be understood as meaning, in particular, those structural components which permit a targeted separation of the asphaltene particles according to their particle size.
  • the separation stages used in each case are preferably designed as hydrocyclones.
  • a hydrocyclone is a centrifugal separator for liquid mixtures. With a hydrocyclone solid particles contained in suspensions can be separated or classified. The discharged from the container, enriched with large asphaltene particles first partial flow is through passed the hydrocyclone and this separated the large asphaltene particles from the mother solution.
  • hydrocyclone is advantageous here, since it consists of a container without moving parts and has a low volume due to the short residence time of the first partial flow .
  • An alternative embodiment of the invention provides for the use of decanters and / or self-cleaning edge gap filters, alternatively or in addition to the hydrocyclones as separation stages.
  • the classification device used for the separation comprises a first separation stage for separating large ones
  • the container For the supply of the first partial stream to the first separation stage, the container is suitably ⁇ flow-connected to a supply line of the first separation stage via a first discharge line.
  • the first discharge line of the container is vorzugswei ⁇ se arranged at the bottom thereof, so that the first partial stream withdrawn at the bottom of the container and the first separation stage is supplied ⁇ leads.
  • the separation within the first separation stage takes place taking into account a preset separation grain size.
  • Asphaltene particles with a mean diameter greater than a pre-set size of separation particles are discharged from the process and removed. With a cut-off particle size of 25 ⁇ m, particles having an average diameter greater than 25 ⁇ m are thus discharged.
  • the first separation stage ⁇ advantageous way legally is fluidically connected via a return line to a supply line of the container.
  • a reflux is formed which comprises asphaltene particles whose size falls below the set separation particle size.
  • This return is returned to the container, with the in Return still contained asphaltene particles within the Be ⁇ container or serve within the growth zone of the container as growth nuclei.
  • the first separation stage is a Aufberei ⁇ processing device fluidically connected downstream.
  • the classifier preferably comprises a second separation stage.
  • the container is for supplying the second partial flow to the second separation stage advantageously via ei ⁇ ne second discharge line fluidly connected to a supply line of the second separation stage.
  • the second discharge line of the container is expediently arranged on its head, so that the second partial stream is supplied from the top of the container to the second separating stage.
  • the asphalt particles contained in the discharge line of the container through the second out ⁇ transmitted second part stream are separated in the second separation stage from the solution.
  • the small particles that are not yet grown sufficiently to ⁇ to be separated finally be held in the process.
  • the second separation stage is connected to return a small asphaltene particles enriched second return via a return line to a supply line of the container.
  • the small asphaltene particles are returned to the container and can continue to grow there.
  • the second separation stage is a Aufberei ⁇ processing device fluidically connected downstream.
  • the separation device can be designed, for example, as a solvent treatment, in which the solvent or, based on the asphaltenes, the so-called "anti-solvent", ie the short-chain alkane used, is recovered by evaporation zu ⁇ out and used for renewed Deasphaltmaschine.
  • the container for classifying the asphalt particles is designed according to their particle size ⁇ .
  • the container preferably comprises a classifying zone, within which the asphaltene particles are separated according to their particle size.
  • the classification zone is so ⁇ with integrated in the container and suitably provided in the edge region of the container ⁇ .
  • Deasphalting is possible as an oil pretreatment, which permits the use of heavy fuel oil containing more than 100 ppm of vanadium for power generation by E-class gas engines. allowed. Also, crude oil (Crude) Oil with significantly height ⁇ ren vanadium concentrations than 10 ppm in E-class gas turbines are used, the previously economically through large amounts of magnesium inhibitors and the enormous effort service associated with vigorous Pressure is.
  • the second object of the invention is achieved by methods for the separation of asphaltenes from an oil-containing fuel, wherein the oil-containing fuel is mixed intensively by means of a mixing element with a solvent, wherein during the mixing process on
  • Asphaltenes supersaturated solution is formed, the supersaturation by deposition of the asphaltenes from the supersaturated solution in a container is reduced, whereby existing asphaltene particles grow in a growth zone of the container by deposited from the supersaturated solution asphaltenes, the attached in the growth zone ⁇ grown Asphaltene particles are separated by a classifier according to their particle size, and wherein a
  • Asphaltene particles containing stream between the growth zone of the container and the mixing element circulates.
  • asphaltene particles are already available when mixing the oil-containing fuel to be cleaned with the solvent, which serve as growth nuclei.
  • asphalt particles grow, rather than that new fines need to make.
  • Such fine particulate formation takes place only once at the beginning of the process, al- so when starting the system.
  • These ultrafine particles then serve as growth germs present in the process and they enable a reduction of the supersaturation by precipitation of asphaltene particles from the supersaturated solution.
  • the stream containing asphaltene particles flows from the container into the mixing element.
  • the stream containing asphaltene particles flows from the container into the mixing element.
  • Asphaltenes required particles provided.
  • the asphalt is mixed particles containing stream in the mixing element with the oil-containing fuel and the solution ⁇ medium.
  • the oil-containing fuel and the solvent are mixed within the Be Schol ⁇ ters.
  • the mixing element is hereby arranged —particularly joserwei ⁇ se within the container.
  • the oleaginous internal ⁇ material and the solvent are mixed directly into the container do ⁇ Siert and at the entry point.
  • the entry point is thus preferably designed as a mixing point or as a mixing zone.
  • the mixing is preferably carried out ⁇ by means of a working according to the rotor-stator principle mixing element with a high shear rate.
  • the first partial stream is expediently withdrawn from the bottom of the container from this and flows from there into the first separation stage. In the first separation stage the large asphalt particles that exceed a certain set before ⁇ cut size are separated and thus removed from the process.
  • the return includes asphalt particles un ⁇ terrenz the separation grain size of the first separation stage are.
  • the particles serve within the container again as growth ⁇ germs and improve the solids accumulation within the container.
  • the large asphaltene particles separated from the first partial stream are expediently fed to a treatment device.
  • the treatment device can be designed as a centrifuge, by means of which the large particles are separated.
  • One possible use of the separated asphaltene particles is in road construction.
  • a second partial stream for separating small asphaltene particles is fed to a second separating stage of the classifying device.
  • the second partial stream is expediently withdrawn therefrom at the top of the container and fed to the second separation stage.
  • Asphaltene particles enriched second reflux arises.
  • the asphalt with small particles angerei ⁇ -assured second return is supplied to the container. This allows the small particles within the container to continue growing up.
  • the effluent freed from small asphaltene particles, the clear flow is preferably fed to a treatment device. In this case, it is preferred if the outflow stream is fed to a solvent recovery in which the solvent is evaporated and regenerated. Finally, the regenerated solvent can be in this way, be re-used for mixing with the oil-containing fuel at ⁇ play a pentagonal section.
  • the asphaltene particles are separated within a classification of the container according to their particle size.
  • Wor ⁇ th of the container acts as a classifier, in which the particles are pre-separated according to their particle size. It is therefore an internal classification zone within the Be Schol ⁇ ters, which is expediently provided in the edge region of the container in the form of a quiet zone.
  • FIG. 1 shows a device for separating asphaltenes from an oil-containing fuel with a mixing element fluidically connected container, as well as
  • Asphaltenes from an oil-containing fuel with an arranged mixing elements ⁇ within a container Asphaltenes from an oil-containing fuel with an arranged mixing elements ⁇ within a container.
  • FIG. 1 shows a device 1 for the separation of asphaltenes from an oil-containing fuel 3.
  • fuel 3 a heavy oil is used.
  • the heavy oil 3 will be together with pentane supplied as a solvent 5 via corresponding supply lines 7, 9 designed as a mixing pump mixing element 11. Within ⁇ within the mixing element 11, the heavy oil 3 and the solvent 5 are mixed ultrafast.
  • a rapid mixing produces a metastable, supersaturated solution, which avoids the formation of a phase interface between the heavy oil 3 and the pentane 5 and thus prevents premature precipitation of asphaltene particles during the mixing process.
  • the resulting mixture 13 is supplied to a mixing element 11 connected to the mixing tank 11, to which the mixing element 11 is fluidly connected via a discharge line 17 with a supply line 19 of the container 15.
  • the precipitation process of asphaltenes begins. The precipitating from the solution asphaltenes failed ⁇ off to existing in the process asphalt particles.
  • a growth zone 23 in which grow the asphaltene particles.
  • the required for the subsequent separation of the growth of solid enrichment within the container 15 is ensured by a sufficiently long residence time of the asphalt particles in Bephol ⁇ ter 15th The longer the residence time of the asphalt particles
  • Asphaltene particles the higher the deposition rate and thus, due to the improved separation of the particles, and the cleaning performance of the separation device 1 used.
  • a classifying device 25 is fluidically connected to the container 15.
  • the classifier 25 for this purpose comprises two plates 27, 29.
  • the coupling of the first separation stage 27 to the Benzol ⁇ ter via the connection of a first discharge line 31 of the container 15 to a supply line 33 of the first separation stage 27 via lines 31, 33 the first Trennstu ⁇ fe 27, a first portion stream 35 is supplied.
  • the discharge line 31 of the container 15 is connected to the bottom 37 thereof.
  • the first separation stage 27 which is designed as a hydrocyclone, are large asphalt particles 39 that exceed a set before ⁇ separation grain size of 25 ym, removed from the process. They are fed via a discharge line 41 to a treatment device 43 and can subsequently be supplied to a further use, for example in road construction.
  • the first separation stage 27 is connected to a return line 47, which is fluidically connected to a supply line 49 of the container 15.
  • the asphalt particles now still contained in the return 45 are within the container 15 or within the growth zone 23 of the Be ⁇ boders 15 as a growth germ.
  • the second separation stage 29 of the classifier 25 is used to separate smaller asphalt particles 51 from a second part flow 53.
  • the second discharge line 55 of the container is arranged on the head 59.
  • the second partial flow 53 essentially comprises small
  • Asphaltene particles 51 which are to be kept in the process in order to continue to grow there. Accordingly, in the second separation stage 29 which is also formed as a hydrocyclone off asphalt particles 51 separated by an average ym By ⁇ diameter above 5 from the liquid and returned to the container 15th The return of the enriched with small asphaltene particles 51 second return 61 via a connection of a return line 63 of the second separation stage 29 with a feed line 65 of the container 15th
  • the second separation stage 29 is a Aufberei ⁇ processing device 67 downstream of flow.
  • the processing device 67 29 is connected discharge pipe 69 of the formed in the Abtren ⁇ drying the asphalt particles 51 flow stream 71, a clear effluent is fed via one of the second separation stage.
  • the solvent 5 can be recovered and returned to the mixing element 11.
  • ⁇ ses asphalt particles 73 having an average diameter in a range between 5 .mu.m and 25 .mu.m, which can be performed in a circuit 75 miles.
  • a partial flow 79 with these asphaltene particles 73 is fed to the mixing element 11 via a return line 77 connected to the container 15.
  • the return line 77 of the container 15 is connected to a feed line 81 of the mixing element 11.
  • the feed element 81 is also connected to the mixing element 11, via which the feed or the circulation of growth nuclei for the asphaltene separation is ensured.
  • the asphaltene particles 73 contained in the circulating stream 79 are already at the time of Mixing of the oil-containing fuel 3 and the Absmit ⁇ tel 5 growth nuclei for the asphaltenes available.
  • the asphaltenes contained in the supersaturated solution, ie the mixture 13 are deposited only on the asphaltene particles 73 already present and grow there. In other words, the precipitate, which occurs substantially immediately after the mixing of the oily fuel 3 and the solvent 5, by the circulation of the
  • Asphaltene particles between the mixing element 11 and the growth zone 23 of the container 15 are selectively controlled.
  • a classifying zone 83 which alternatively or in addition to the first separation stage 27 separates large asphaltene particles.
  • the position of the classifying zone 83 within the container 15 is indicated here by an arrow.
  • FIG. 2 shows a further device 91 which likewise serves to separate asphaltenes from an oil-containing fuel 3 by means of a solvent 93, in the present case hexane.
  • the structural difference between the device 91 and the device 1 according to IG 1 is that the mixing element 95 used is not connected upstream of the container 97, as is the case with the device 1, but instead is arranged inside the container 97.
  • the mixing takes place within the container 97 in a formed on the wall 103 mixing zone 105 by means of the mixing element formed as an internal mixing pump 95 immediately upon entry of the heavy oil 3 and the solvent 93.
  • the mixing ⁇ element 95 By the mixing ⁇ element 95, the necessary ultrafast mixing of the two components 3, 93 ensured.
  • the mixture 109 resulting from the mixing flows through a suitable flow guide within the container 95 into the growth zone 111 of the container 95, where the asphaltenes precipitate or those which have already precipitated
  • Asphaltene particles continue to grow. As growth nuclei, they are also available here in the container 95 asphaltene particles 113 medium size available. Zirku ⁇ thus also prominent between the mixing element 95 and the growth zone 111 due to the flow conditions, an Asphal ⁇ tenpumble 113 containing partial stream 115.
  • the asphalt particles 113 provide as growth nuclei a surface be ⁇ riding that favors the deposition of asphaltenes and at the same deposition caused contamination of Wandun ⁇ conditions, pipelines or the like of a device used for Deasphaltmaschine 1 prevents.
  • the container 97 may be a classifying zone 117, whose position is indicated by an arrow out ⁇ forms which serves as an alternative or in addition to the first separation stage 27 of the classifying large asphalt particles.
  • the detailed description of the device 1 according to FIG. 1 can be transferred to the device 91 according to FIG.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

L'invention concerne un dispositif (1, 91) pour la séparation d'asphaltènes d'un combustible (3) contenant de l'huile, comprenant un élément mélangeur (11, 95) pour le mélange intensif du combustible (3) contenant de l'huile avec un solvant (5, 93) tout en formant une solution sursaturée en asphaltènes, un récipient (15, 97) pour la dégradation de la sursaturation par séparation des asphaltènes de la solution sursaturée, une zone de croissance (23, 111) réalisée à l'intérieur du récipient (15, 97) pour la croissance des particules d'asphaltènes présentes par les asphaltènes séparés de la solution sursaturée, ainsi qu'un dispositif de classification (25) raccordé de manière fluidique au récipient (15, 97) pour la séparation des particules d'asphaltène qui ont grandi dans la zone de croissance (23, 111) en fonction de leur grosseur de particule, le récipient (15, 97) étant conçu et configuré de manière telle qu'un flux (79, 113) contenant des particules d'asphaltènes circule entre l'élément de mélange (11, 95) et la zone de croissance (23, 111) du récipient (15, 97). De plus, l'invention concerne un procédé correspondant, dans lequel un flux (79, 113) contenant des particules asphaltènes circule entre l'élément de mélange (11, 95) et la zone de croissance (23, 111) du récipient (15, 97).
EP16706992.1A 2015-04-28 2016-02-12 Dispositif et procédé pour la séparation d'asphaltènes d'un combustible contenant de l'huile Withdrawn EP3259334A1 (fr)

Applications Claiming Priority (2)

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DE102015207764 2015-04-28
PCT/EP2016/052955 WO2016173732A1 (fr) 2015-04-28 2016-02-12 Dispositif et procédé pour la séparation d'asphaltènes d'un combustible contenant de l'huile

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EP3259334A1 true EP3259334A1 (fr) 2017-12-27

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CA (1) CA2984027C (fr)
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US11680521B2 (en) 2019-12-03 2023-06-20 Saudi Arabian Oil Company Integrated production of hydrogen, petrochemicals, and power
US11193072B2 (en) 2019-12-03 2021-12-07 Saudi Arabian Oil Company Processing facility to form hydrogen and petrochemicals
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US11248174B2 (en) 2019-12-27 2022-02-15 Saudi Arabian Oil Company Process to remove asphaltene from heavy oil by solvent
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US11999619B2 (en) 2020-06-18 2024-06-04 Saudi Arabian Oil Company Hydrogen production with membrane reactor
US11578016B1 (en) 2021-08-12 2023-02-14 Saudi Arabian Oil Company Olefin production via dry reforming and olefin synthesis in a vessel
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CN107532091A (zh) 2018-01-02
KR20170129946A (ko) 2017-11-27
WO2016173732A1 (fr) 2016-11-03
CA2984027C (fr) 2020-03-24
US20180119026A1 (en) 2018-05-03
CA2984027A1 (fr) 2016-11-03
KR102039453B1 (ko) 2019-11-01
SA517390206B1 (ar) 2022-04-27
US10570341B2 (en) 2020-02-25
CN107532091B (zh) 2020-05-15

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