CN105583178A - Heavy oil electro-desalting back-washing system and method thereof - Google Patents
Heavy oil electro-desalting back-washing system and method thereof Download PDFInfo
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- CN105583178A CN105583178A CN201410583385.9A CN201410583385A CN105583178A CN 105583178 A CN105583178 A CN 105583178A CN 201410583385 A CN201410583385 A CN 201410583385A CN 105583178 A CN105583178 A CN 105583178A
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Abstract
The invention discloses a heavy oil electro-desalting back-washing system. The heavy oil electro-desalting back-washing system is arranged in a back-washing tank body and comprises a dewatering pipe, a support and a plurality of all-dimensional rotary jets. The multiple all-dimensional rotary jets are arranged on the support. Each all-dimensional rotary jet further comprises a plurality of back-washing pipes, a plurality of back-washing branch pipes and rotary nozzles. Each back-washing pipe is evenly provided with the corresponding multiple back-washing branch pipes. One rotary nozzle adopting a rotary forced injection mode is arranged at the tail end of each back-washing branch pipe. The invention further discloses a heavy oil electro-desalting back-washing method.
Description
Technical field
The present invention relates to PETROLEUM PROCESSING field, particularly a kind of novel inferior heavy oil electro-desalting backwashing systemAnd method.
Background technology
At present the inferior heavy oil popular feature of processing be that density is large, viscosity large, sulfur content or acid number is high, carbon residueHigh, nitrogen content is high, tenor is high, light oil yield is low, and because production practice reason causes contained mudHusky a lot. The reducing of the too thick actual volume that can cause pool in tank of mud at the bottom of electrical desalter, in position, boundary notIn situation about becoming, in tank, actual interface is too low, and water-oil separating time shorten, causes water-oil separating bad, electricityElectro-desalting transformer electric current superelevation, dewatering bands oil phenomenon, even transformer electric pole short circuit. Therefore, general at presentAdopt backwash technique to remove the silt in electrical desalter.
Application number is that in 201120525508 Chinese invention patent, to disclose a kind of crude oil electric desalting dewatering anti-Rinse-system, as depicted in figs. 1 and 2, this device is a kind of crude oil electric desalting dewatering back purge system, itComprise a horizontal cylinder type electric desalting drain sump, the lower end of tank is one group to four groups back purge system, recoilWash pipe 3, backwash arm, shower nozzle 7, sewage draining exit 5 and support composition. Backwash tube is taken off by electro-desaltingWater pot bottom enters in tank apart from 450mm left and right at the bottom of tank, is distributed in vertically pot bottom central authorities, at interval of600mm left and right is downward vertically in tank base distribution backwash arm, and backwash arm end has shower nozzle 7,Backwash arm end-to-end distance tank base 20mm mono-50mm, the middle part of every group of back purge system is provided with blowdownMouth 5. At the bottom of tank is fixed on by two supports in backwash tube 3 two ends.
The electric desalting and dewatering back purge system of above-mentioned disclosed available technology adopting, backwash tube is axial along tankDirectly over being arranged at the bottom of tank, be uniformly distributed backwash arm on backwash tube, backwash arm downward verticallyIn tank base, there is shower nozzle at backwash arm end, shower nozzle and tank base certain angle that tilts, anti-Rinsing current is sprayed by shower nozzle. Due to processing inferior heavy oil electrical desalter length larger, the nozzle that usesMany, even two water pumps turn round in the time of backwash simultaneously, also not becoming at nozzle place can be by tank bed mud sandRush needed pressure. Although can divide silt to take electrical desalter out of pot bottom, also have suitable onePart sedimentation at the bottom of electrical desalter, through long time integration, cause tank at the bottom of mud too much, part recoilWash nozzle and even buried by mud, only have the nozzle of small part playing a part backwash. In addition due toThe electrical desalter pot bottom of Crude Desalting System, the pressure at each osculum place is identical, and each osculumTo the length of pipeline difference of total osculum, and usually only need 1 osculum draining just completely can when drainingTo reach instructions for use, and the osculum far away apart from main sewer relative distance, due to the water flow in pipeResistance is greater than other osculums, and in pipe, the flow velocity of water is relatively slow, and in water, the foreign material such as entrained silt graduallyCorresponding this osculum pipeline is become silted up dead, closely cause this osculum to block. Silt around of osculum andEven if mud is backwashed system and rushes, most silt and mud also cannot be discharged electrical desalter, andBe but the desalter that falls to wiring back at the bottom of. More long-pending higher at this place, after reaching a certain height, even connect this backwash system of placeThe nozzle of system all sprays not water outlet have been come.
Based on problems of the prior art, need to design one and can effectively remove and deposit in electrical desalterIn silt and the back purge system of mud.
Summary of the invention
The object of the present invention is to provide a kind of heavy oil electro-desalting backwashing system, deposit to solve in prior artCannot effectively remove silt in electrical desalter and the problem of mud.
For reaching above-mentioned purpose, the invention provides a kind of heavy oil electro-desalting backwashing system, be arranged at backwashTank interior, comprising: dehydrating tube, support, on described support, be provided with multiple all-directional rotation injectors,Each described all-directional rotation injector comprises: multiple backwash tubes, multiple backwash arm and swivel nozzle,On each described backwash tube, be evenly provided with multiple described backwash arms, prop up in each described backwashThe end of pipe is provided with the described swivel nozzle that adopts rotation forced jet mode.
Above-mentioned heavy oil electro-desalting backwashing system, is characterized in that, is evenly provided with many on described swivel nozzleIndividual water jet.
Above-mentioned heavy oil electro-desalting backwashing system, described swivel nozzle also comprises: rotary drive mechanism and transmissionMechanism, described rotary drive mechanism is entering under the dynamic action that tank current carry to drive described transmission mechanism, byDescribed transmission mechanism drives described water jet rotation, carries out institute to enter the injection of tank current all-directional rotation described in generalState the cleaning of backwash tank body.
Above-mentioned heavy oil electro-desalting backwashing system, arranges 3 described full rotations and sprays in described backwash tank bodyDevice, is provided with 4 described swivel nozzles on every described full rotation injector.
Above-mentioned heavy oil electro-desalting backwashing system, described swivel nozzle is monomer rotary ejection type or many bodies rotary ejection type.
Above-mentioned heavy oil electro-desalting backwashing system, described multiple water jets are axial around described backwash armBe uniformly distributed 90 °, each described water jet interval.
Above-mentioned heavy oil electro-desalting backwashing system, water (flow) direction and the described tank body tangent line of described water jet ejectionBe 60 ° of angles.
Above-mentioned heavy oil electro-desalting backwashing system, described multiple backwash tubes are parallel to described tank body and axially arrangeIn the bottom center of described tank body.
Above-mentioned heavy oil electro-desalting backwashing system, described backwash tube is axially set in along described backwash tank body300 millimeters to 400 millimeters of tops at the bottom of tank.
Above-mentioned heavy oil electro-desalting backwashing system, the spacing of described backwash arm be 700 millimeters to 780Millimeter.
Above-mentioned heavy oil electro-desalting backwashing system, the described backwash tank base 30 of described swivel nozzle distanceMillimeter is to 40 millimeters.
Above-mentioned heavy oil electro-desalting backwashing system, described multiple dehydrating tubes are uniformly distributed in described backwash tank bodyBottom.
The present invention also provides a kind of heavy oil electro-desalting back-flushing method, is applied to heavy oil electro-desalting described above anti-Rinse-system, described method comprises:
Enter water step: enter tank current and flow into described backwash tube through backwash water inlet, and through described recoilWash pipe and enter described backwash arm;
Rinsing step: described in enter tank current and enter described swivel nozzle via described backwash arm, described in revolveTurn nozzle by a rotary drive mechanism entering under the dynamic action that tank current carry to drive a transmission mechanism, by thisTransmission mechanism drives described swivel nozzle rotation, described in inciting somebody to action, enters the injection of tank current all-directional rotation, carries out instituteState the cleaning of backwash tank body;
Drain step: described in enter tank current and carry silt in described tank body and drift via described dehydrating tubeFlow out described tank body and complete cleaning.
Than method of the prior art, the main beneficial effect of the present invention is: the present invention is not changingElectrical desalter type structure, do not change under the prerequisite of production procedure, utilize the supporting power of Crude Desalting System flow processSystem, adopts the mode of rotation forced jet, and by the whole power that enter tank liquid and carry, directly acting on canCan there is the region of deposition, electrical desalter is carried out to comprehensive cleaning; Adopt the each backwash of apparatus of the present inventionUsed time number minute, to tens of minutes, does not affect the situation of the normal use of electrical desalter and other purposes of pipelineUnder, effectively remove silt and mud in tank body, optimize the time of staying in electrical desalter.
Brief description of the drawings
Fig. 1 is the crude oil electric desalting dewatering backwashing system structural representation of prior art;
Fig. 2 is the nozzle structure schematic diagram of the crude oil electric desalting dewatering backwashing system of prior art
Fig. 3 is heavy oil electro-desalting backwashing system structural representation one of the present invention;
Fig. 4 is heavy oil electro-desalting backwashing system structural representation two of the present invention;
Fig. 5 is all-directional rotation emitter construction schematic diagram of the present invention;
Fig. 6 is swivel nozzle structural representation of the present invention;
Fig. 7 is the present invention's back-flushing method schematic flow sheet that dewaters.
Wherein, Reference numeral:
3 backwash tube 5 sewage draining exits
7 shower nozzles
10 dehydrating tube 30 all-directional rotation injectors
31 backwash tube 32 backwash arms
33 swivel nozzles
331 water jet 332 rotary drive mechanisms
333 transmission mechanism 334 backwash mouths enter water direction
S1～S3: specific embodiment of the invention step
Detailed description of the invention
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as to of the present inventionLimit.
The novel inferior heavy oil electro-desalting of one provided by the invention backwashing system, is not changing electrical desalter typeStructure, do not change under the prerequisite of production procedure, utilize the supporting dynamical system of Crude Desalting System flow process, adoptThe mode of rotation forced jet, by the whole power that enter tank liquid and carry, directly acts on and may occur depositionRegion, electrical desalter is carried out to comprehensive cleaning. This device adopts all-directional rotation nozzle technology to carry out electricityDesalination backwash operation, can realize and remove deposit and sediment in electrical desalter, optimizes in electrical desalterThe time of staying.
Shown in Fig. 3, Fig. 4 and Fig. 5, this heavy oil electro-desalting backwashing system, is arranged at recoil cleaning of evaporatorBody inside, this system comprises: dehydrating tube 10, support, and multiple all-directional rotation injector 30, multipleAll-directional rotation injector 30 is arranged on support; Each all-directional rotation injector 30 further comprises:Multiple backwash tubes 31, multiple backwash arm 32 and swivel nozzle 33, on each backwash tube 31Evenly be provided with multiple backwash arms 32, be provided with and adopt rotation at the end of each backwash arm 32The swivel nozzle 33 of forced jet mode. Backwash water inlet is stretched into outward in tank and is connected with backwash tube 31 by tankLogical, backwash tube 31 is fixed in electric dehydration desalter by support.
Wherein, multiple backwash tubes 31 are parallel to tank body and are axially set in the bottom center of tank body, and,Backwash tube 31 is axially set at the bottom of tank 300 millimeters to 400 millimeters of tops along backwash tank body. BackwashBetween arm 32 spacing be 700 millimeters to 780 millimeters, the end of backwash arm 32 is provided with and revolvesTurn nozzle 33, each swivel nozzle 33 is apart from 30 millimeters to 40 millimeters of backwash tank base, multiple de-Water pipe 10 is uniformly distributed in the bottom of backwash tank body.
Wherein, as shown in Figure 6, on each swivel nozzle 33, be evenly provided with multiple water jet 331,Rotary drive mechanism 332 and a transmission mechanism 333, entering tank current, to enter water direction 334 at backwash mouth enterprisingEnter swivel nozzle 33, rotary drive mechanism 332 is entering under the dynamic action that tank current carry to drive driverStructure 333 drives multiple water jets 331 to rotate by transmission mechanism 333 simultaneously, comprehensive will enter tank currentRotary-jet carries out the cleaning of backwash tank body.
In preferred embodiment of the present invention, adopt 1～3 full rotation injector 30 be set in backwash tank body,On every full rotation injector 30, be provided with 4 swivel nozzles 33, swivel nozzle 33 is monomer rotary ejection typeOr many bodies rotary ejection type, wherein, on each swivel nozzle 33, be provided with 331,4 water jets of 4 water jets331 around being axially uniformly distributed of backwash arm 32, each water jet 90 °, 331 interval distribution. AndAnd the water (flow) direction that water jet 331 sprays and tank body tangent line are 60 ° of angles. But the present invention not asLimit, the present invention can also adopt full rotation injector, swivel nozzle and the water jet of other quantity.
The design pressure that adopts water jet 331 in preferred embodiment of the present invention is 2.5MPa, interface nominalCaliber is DN80, and flange nominal pressure is 2.5MPa, and minimum discharge is 80m3/ h sprays work at every turnDo 10～60 minutes time. The rotary speed of swivel nozzle 33 be 7.5 minutes/turn. But the present invention is notAs limit.
Operation principle and beneficial effect below in conjunction with accompanying drawing to apparatus of the present invention are elaborated:
The present invention, not changing electrical desalter type structure, not changing under the prerequisite of production procedure, utilizes electro-desaltingThe dynamical system that system flow is supporting, adopts the mode of rotating forced jet, will enter whole that tank liquid carriesPower, directly acts on the region that may occur deposition, and electrical desalter is carried out to comprehensive cleaning. Each anti-Rinse used time number minute to tens of minutes, do not affect the normal use of electrical desalter and other purposes of pipeline.Rotary jet belongs to non-standard equipment, and 3 all-directional rotation injectors 30 are installed in each electrical desalter,Every 4 swivel nozzles 33 are installed. Axially evenly dividing around backwash arm 32 on each swivel nozzle4 water jets 331 of cloth, 90 °, each water jet 331 interval, the design pressure of each water jet is2.5MPa, interface nominal bore is DN80, flange nominal pressure is 2.5MPa, minimum discharge 80m3/ h, it is 10～60 minutes that each swivel nozzle 33 sprays the working time. Swivel nozzle rotary speed 7.5Minute/turn. Main material as shown in Table 1.
Table one: swivel nozzle material list
The present invention carries out application experiment in the crude oil coking plant electro-desalting of a set of processing inferior heavy oil.
Before application experiment of the present invention, although original back purge system can divide silt to take desalination out of pot bottomTank, but also have quite a few sedimentation at the bottom of electrical desalter, through long time integration, becomes silted up at the bottom of causing tankMud is too much, and partial back-washing nozzle is even buried by mud. Only have the nozzle of small part playing backwashEffect. Because the electrical desalter length of this cover Crude Desalting System is 18 meters, there are four rows at pot bottom in additionWater hole, the pressure at each osculum place is identical, and four osculums are not to the length of pipeline of total osculumWith, and usually only need 1 osculum draining just can reach instructions for use completely when draining, and distanceThe osculum that main sewer relative distance is far away, because the water flow resistance in pipe is greater than other osculums, pipeThe flow velocity of interior water is relatively slow, and in water, the foreign material such as entrained silt are gradually by corresponding this osculum pipelineBecome silted up dead, and then cause this osculum to block. Even if osculum silt and mud is around backwashed system punchingGet up, most silt and mud also cannot be discharged electrical desalter, but at the bottom of the desalter that falls to wiring back again. ?This place is more long-pending higher, and after reaching a certain height, even the nozzle of this place's backwashing system all cannot be sprayed water. AndAnd, cause the reducing of actual volume in pool in tank because mud at the bottom of electrical desalter is too thick, at boundary's invariant positionIn situation, cause the interior actual interface of tank too low, water-oil separating time shorten, causes water-oil separating bad, justCause electro-desalting transformer electric current superelevation, dewatering bands oil phenomenon, even cause transformer electric pole short circuit.
After apparatus of the present invention application experiment, particularly in the device operation later stage, 6 covers that electro-desalting is used becomeThe electric current of depressor is always lower, the ammeter demonstration on operation board, and every transformer current exists substantially always200A, between 220A, illustrates that in tank, silt clogging is not obvious, and backwash effect is better. In maintenanceTime observe to obtain sedimentation degree by opening manhole, also find that the backwash effect of apparatus of the present invention is goodGood.
The present invention also provides a kind of electro-desalting back-flushing method, adopts above-mentioned all-directional rotation injector, will enterWhole power that tank liquid carries, directly act on the region that may occur deposition, and electrical desalter is carried out entirelyOrientation is cleaned.
As shown in Figure 7, heavy oil electro-desalting back-flushing method provided by the invention, comprising:
Enter water step S1: enter tank current and flow into backwash tube 3 through backwash water inlet, and, enter tank waterStream enters backwash arm 32 through backwash tube 3;
Rinsing step S2: enter tank current and enter swivel nozzle 33, swivel nozzle through backwash arm 3233 rotary drive mechanism 332 is entering drive transmission device 333 under the dynamic action that tank current carry, by passingActuation mechanism drives water jet 331 to rotate, and sprays will enter tank current all-directional rotation, carries out backwash tank bodyCleaning;
Drain step S3: enter tank current and carry silt in tank body and drift by dehydrating tube 10 pouring vesselsBody, completes cleaning.
In sum, a kind of electric desalting and dewatering backwashing system of the present invention and method thereof, with existing recoilCleaning device and method are compared, and can form the larger area that washes away at electric desalting drain sump inner bottom part, make to be deposited onThe solid impurity of tank base to greatest extent in flushing process in suspended state, along with sewage backwashOutside mouth drain tank. Each backwash used time number minute to tens of minutes, does not affect the normal use of electrical desalterOther purposes with pipeline. Can realize and remove deposit and sediment in electrical desalter, optimize electrical desalterThe interior time of staying, increase to greatest extent the operating flexibility of device. Also can make this device become passable simultaneouslyProcess the device of various heavy crude inferior.
Certainly, the present invention also can have other various embodiments, in the feelings that do not deviate from spirit of the present invention and essence thereofUnder condition, those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, butThese corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (13)
1. a heavy oil electro-desalting backwashing system, is arranged at backwash tank interior, comprising: dehydrating tube,Support, is characterized in that, is provided with multiple all-directional rotation injectors on described support, each described completeOrientation rotation injector comprises: multiple backwash tubes, multiple backwash arm and swivel nozzle, and in each instituteState on backwash tube and be evenly provided with multiple described backwash arms, at the end of each described backwash armBe provided with the described swivel nozzle that adopts rotation forced jet mode.
2. heavy oil electro-desalting backwashing system according to claim 1, is characterized in that described rotationOn nozzle, be evenly provided with multiple water jets.
3. heavy oil electro-desalting backwashing system according to claim 2, is characterized in that described rotationNozzle also comprises: rotary drive mechanism and transmission mechanism, tank current carry described rotary drive mechanism enteringUnder dynamic action, drive described transmission mechanism, drive described water jet to rotate by described transmission mechanism, with by instituteState into tank current all-directional rotation and spray the cleaning of carrying out described backwash tank body.
4. heavy oil electro-desalting backwashing system according to claim 1, is characterized in that described recoil3 described full rotation injectors are set in cleaning of evaporator body, on every described full rotation injector, are provided with 4 institutesState swivel nozzle.
5. heavy oil electro-desalting backwashing system according to claim 3, is characterized in that described rotationNozzle is monomer rotary ejection type or many bodies rotary ejection type.
6. heavy oil electro-desalting backwashing system according to claim 2, is characterized in that, described multipleWater jet is axially uniformly distributed around described backwash arm, 90 °, each described water jet interval.
7. heavy oil electro-desalting backwashing system according to claim 6, is characterized in that described water sprayWater (flow) direction and the described tank body tangent line of mouth ejection are 60 ° of angles.
8. heavy oil electro-desalting backwashing system according to claim 1, is characterized in that, described multipleBackwash tube is parallel to described tank body and is axially set in the bottom center of described tank body.
9. heavy oil electro-desalting backwashing system according to claim 1, is characterized in that described recoilWash pipe and be axially set at the bottom of tank 300 millimeters to 400 millimeters of tops along described backwash tank body.
10. heavy oil electro-desalting backwashing system according to claim 1, is characterized in that described recoilThe spacing of washing arm is 700 millimeters to 780 millimeters.
11. heavy oil electro-desalting backwashing systems according to claim 3, is characterized in that described rotation30 millimeters to 40 millimeters of backwash tank base described in nozzle distance.
12. heavy oil electro-desalting backwashing systems according to claim 1, is characterized in that, described multipleDehydrating tube is uniformly distributed in described backwash tank base.
13. 1 kinds of heavy oil electro-desalting back-flushing methods, are applied to the heavy oil electricity as described in claim 1-12Desalination backwashing system, is characterized in that, comprising:
Enter water step: enter tank current and flow into described backwash tube through backwash water inlet, and through described recoilWash pipe and enter described backwash arm;
Rinsing step: described in enter tank current and enter described swivel nozzle via described backwash arm, described in revolveTurn nozzle by a rotary drive mechanism entering under the dynamic action that tank current carry to drive a transmission mechanism, by thisTransmission mechanism drives described swivel nozzle rotation, described in inciting somebody to action, enters the injection of tank current all-directional rotation, carries out instituteState the cleaning of backwash tank body;
Drain step: described in enter tank current and carry silt in described tank body and drift via described dehydrating tubeFlow out described tank body and complete cleaning.
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| WO2022082626A1 (en) * | 2020-10-21 | 2022-04-28 | 南京延长反应技术研究院有限公司 | Wet oxidation micro-interface system |
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| WO2022082621A1 (en) * | 2020-10-21 | 2022-04-28 | 南京延长反应技术研究院有限公司 | Hydrogenation enhancing micro-interface system |
| CN116493364A (en) * | 2023-06-28 | 2023-07-28 | 盛虹炼化(连云港)有限公司 | Electric desalting device backwashing system and backwashing method thereof |
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