CN102718375B - Oily sediment treatment method and device - Google Patents
Oily sediment treatment method and device Download PDFInfo
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- CN102718375B CN102718375B CN 201210211085 CN201210211085A CN102718375B CN 102718375 B CN102718375 B CN 102718375B CN 201210211085 CN201210211085 CN 201210211085 CN 201210211085 A CN201210211085 A CN 201210211085A CN 102718375 B CN102718375 B CN 102718375B
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Abstract
The invention provides an oily sediment treatment method and device. The method comprises the following steps of screening by a rotary screen; carrying out two times of ultrasonic washing and two times of air stripping; and utilizing the corresponding oily sediment treatment device. The oily sediment treatment method and device disclosed by the invention have the advantages of less investment and convenience for transportation; the oily sediment can be movably, conveniently and rapidly cleaned, so that not only oil sand grains with the diameter of more than 80 mm can be washed cleanly, but also the aims of carrying out a plurality of steps of washing on the oil sand grains with the diameter of more than 80 mm and protecting the environment are achieved; and the oil content of the treated oily sediment completely achieves an environment-friendly discharge standard.
Description
Technical field
The invention belongs to environmental technology field, relate in particular to a kind of oil-containing mud sand treatment process and device.
Background technology
Land and offshore oil can produce a large amount of oil-containing mud sands that is scattered in exploitation, conveying, storage process, as clearing up a large amount of oil sludge and sand that can produce behind the bottom precipitations such as storage tanker, water knockout, slop oil tank in the oilfield process, also have and marinely take place to drift about after the event of the perils of the sea to the oil spilling of seashore etc.The complicated component of oil-containing mud sand is oil, mud, sand, the heterogeneous admixture of water, belongs to solid waste, and water surrounding, edatope are polluted.
Domestic and international processing to the oil field oil-containing silt particle at present has concentrated stacking method, isolation method, coagulating treatment method, hot water cleaning, solvent oil extraction, drying and incinerating method, landfill method, chemical oxidization method, biological treatment etc. usually.But existing method oil removal rate is low, easily causes secondary pollution; Handle untimelyly, can't accomplish timely collection, in time handle, discharging in time, long processing period; Silt content and water content height in the oil that reclaims.And prior art is separated not thorough to the oil-containing mud sand that comprises foreign material, cause the silt particle of separation still to comprise the part greasy dirt easily, and environment is on every side caused the secondary recontaminate.
The broken cleaning machine of a kind of greasy filth is disclosed at Chinese patent CN2484130Y, wherein casing one side is hopper, be provided with three rotating blades in the hopper, termination is installed in the wash bowl in the casing under the hopper, the wash bowl surface arranges porose, be axle in the wash bowl, axle is provided with strand cage blade and free combat blade, and the wash bowl bottom connects the entrance of worm conveyor; Be provided with two square frame shape agitators in tank floor; Be provided with the mud outlet in tank floor, be provided with track on casing, the frizing frame is installed in orbit by the rail wheel, and oil scraping plate is installed on the frizing frame by the frizing suspension hook, and the corresponding oil scraping plate of oil trap is installed on the cabinet wall; In casing, be provided with heat-conducting oil pipes and thermal oil scatterer.In this patent documentation, exist cleaning or cleaning not thorough, the oil sediment of discharging still contains a large amount of oily article.
In addition, disclose a kind of pollution-free oil-containing sediment and purification treatment process at Chinese patent CN101428247A, with oily sediment settling isolation of purified, implementation step is as follows: (1) uses foreign material except selecting machine to sort the foreign material that screen out in the oil sediment; The application machine feeding device with oily sediment evenly send into foreign material except select machine simultaneously in the oil sediment perfusion hot water and fractionated polymer from emulsion splitter, the hot water temperature is 40～95 ℃, or adding delivering vapor, its temperature is not less than 35 ℃ with the working temperature of the terminal cyclone separator of assurance system and is as the criterion; Every cubic metre of oil sediment perfusion hot water amount is 1～7 ton, and it is 1～6 kilogram from the emulsion splitter pharmaceutical quantities that every cubic metre of oil sediment adds fractionated polymer; (2) the oily sediment homogeneous is modulated; Adopt cal rolling to stir the effect of giving full play to the broken glue of medicament breakdown of emulsion; (3) cavitation air supporting three phase separation; In tank body, oil, water, silt are carried out three phase separation; (3.1) tangentially leave greasy filth mortar entrance on cylindric tank body top, and at the tank body internal upper part eddy flow guider is set, the greasy filth slurry is with the pressure of 0.1～0.4MPa, and per hour 5～40 cubic metres flow enters tank body, carries out cyclonic separation by the eddy flow guider; (3.2) in the central position, middle and lower part of cylindric tank body, the ultrasonic generator of installation power 1～8K w, frequency 〉=20K H z carries out ultrasonic cavitation to the greasy filth mortar in the tank body and cleans; (3.3) in the bottom of cylindric tank body, installation can spray the pipeline of water vapor downwards, the greasy filth mortar in the tank body is carried out dissolved air floatation handle; (4) most of oil and less water are discharged from cavitation air supporting triphase separator tank body top, enter oil-water separation tank, mud, sand, settling and most of water pump from cavitation air supporting triphase separator tank base, add the flocculation agent that contains 0.1%～0.2% poly-third first amine (P A M) simultaneously, every cubic metre of mud adds 0.5～4 kilogram; (5) silt separates: cement mortar is with the pressure of 0.03～0.4MP a, and per hour 5～40 cubic metres flow enters cyclone separator, and moisture silt is separated; (6) clean beach volleyball goes out, and is cured forming processes after the dehydration routinely; (7) solid-liquid separation; Use whizzer with the water in the aqueous slurry and a small amount of separating of oil come out, enter oil-water separation tank; (8) simultaneously clean mud is discharged, and is cured forming processes routinely; (9) the thin mud that enters the oil-water separation tank front and back is told thin mud with the press type filter.This technology has certain advance, but in step (1) is implemented simultaneously in the oil sediment perfusion hot water and fractionated polymer under the vigorous stirring effect, not only destroyed the crude oil composition from emulsion splitter, also used hot water in large quantities, cause energy consumption excessive; And in step (3.3) in the bottom of cylindric tank body, installation can spray the pipeline of water vapor downwards, the greasy filth mortar in the tank body is carried out dissolved air floatation handle.This equipment claimed is located that in the mechanical separation stage jumbo boiler is set and is supplied with hot water or steam.In addition, in assorting room, add the flocculation agent of the poly-third first amine (P A M), therefore comprised the flocculation agent composition of the poly-third first amine (P A M) in the crude oil that has caused finally obtaining.So this complete equipment is complicated and can not obtain purity than higher oils product.
To contain the silt processing cost in order reducing, and high efficiency separation silt, to be badly in need of now a kind of the oil-containing mud sand that comprises foreign material being carried out effective separation processes.
Summary of the invention
The present invention proposes a kind of oil-containing mud sand treatment process and device in order to overcome above-mentioned prior art shortcoming.
According to a first aspect of the present invention, a kind of oil-containing mud sand treatment process is proposed, it is applicable to the cleaning to the oil-containing mud sand that comprises foreign material, it comprises the next coming in order step:
(1) trommel screen screening step goes out bulk solid with oil-containing mud sand sub-argument under the effect of trommel screen;
(2) first ultrasonic cleaning steps are transported to oil-containing mud sand in first ultrasonic cleaning equipment by first worm conveyor;
(3) first air lift steps use air lift that the oil-containing mud sand of first ultrasonic cleaning equipment bottom deposition is delivered in first sedimentation device;
(4) second ultrasonic cleaning steps add the medicament that impels the thorough medicament that separates of oil-sand or oil and sandstone conjugation are reduced in ultrasonic cleaning, the acceleration oil-sand separates;
(5) second air lift steps: use air lift to divide dried up oil mixt and oil-sand mixture, isolated water oil mixt is entered in the air-floating apparatus, isolated oil-sand mixture is discharged.
Wherein, in trommel screen screening step, the oil-containing mud sand that will comprise foreign material is sent into trommel screen; Comprise the oil-containing mud sand of foreign material through trommel screen, the bulk foreign material are discharged, oil-containing mud sand is delivered to first ultrasonic cleaning equipment through first worm conveyor.
In the first ultrasonic cleaning step, in first ultrasonic cleaning equipment, at first agitator stirred oil-containing mud sand 20 minutes, stirring frequency is 45 rev/mins～50 rev/mins, stirring the cross section is 4%～6% of the first ultrasonic cleaning equipment vertical section, when being stirred to ten minutes oil-containing mud sand is applied sonic oscillation, oil-sand is separated.
In the first air lift step, use air lift that the oil-containing mud sand of first ultrasonic cleaning equipment bottom deposition is delivered in first sedimentation device, first sedimentation device is used for the initial gross separation solid-liquid separation, be separated into water oil mixt and oil-sand mixture, isolated water oil mixt is entered in the air-floating apparatus, isolated oil-sand mixture is delivered to second ultrasonic cleaning equipment through second worm conveyor.
In the second ultrasonic cleaning step, in second ultrasonic cleaning equipment, simultaneously oil-containing mud sand is applied sonic oscillation in stirring, oil-sand is separated; Separate simultaneously at oil-sand, add the medicament that impels the thorough medicament that separates of oil-sand or oil and sandstone conjugation are reduced through dosing mouth, the acceleration oil-sand separates.
In the second air lift step, use air lift that the oil-containing mud sand of second ultrasonic cleaning equipment bottom deposition is delivered in second sedimentation device, second sedimentation device is used for the initial gross separation solid-liquid separation, be separated into water oil mixt and oil-sand mixture, isolated water oil mixt is entered in the air-floating apparatus, isolated oil-sand mixture is discharged.
Preferably, in trommel screen screening step, the oil-containing mud sand that at first will comprise foreign material is sent into trommel screen, when roller grizzly is just changeing, use internal high pressure water that oil-containing mud sand is washed simultaneously; This moment, water temperature was 35～50 degrees centigrade, and the trommel screen rotational frequency is that per minute 30～35 changes.
Preferably, in trommel screen screening step, trommel screen forward (clockwise direction) rotated five minutes, oppositely (counterclockwise) rotation of trommel screen then.
Further, oil-containing mud sand is after entering washing unit, guarantee the interior ultrasonic vibration plate of washing unit below top water-level, the agitator in the Vltrasonic device stirred ten minutes earlier, opens ultrasonic vibration plate then common operation of ultrasonic vibration plate comprehensively cleaned oil-containing mud sand; Open air-lift device after ultrasonic cleaning is finished, the oil-containing mud sand of suspension enters in the stripping tube under the drive of a large amount of high velocity airs, is entrained in first settler; The time that each air-lift device is opened is 1～15 minute.
According to a second aspect of the present invention, a kind of oil-containing mud sand treatment unit is proposed, it is applicable to the cleaning to the oil-containing mud sand that comprises foreign material, and it comprises trommel screen 101, first worm conveyor 201, first ultrasonic cleaning equipment 301, first sedimentation device 401, second worm conveyor 2011, second ultrasonic cleaning equipment 3011, second sedimentation device 4011 and triple helical transfer roller 501, air-floating apparatus 701, fuel reserve tank 601 and water tank 801;
The diameter that trommel screen 101 is used for comprising the oil-containing mud sand of foreign material comes out greater than the particle screen selecting of 80mm, and the oil-sand mixture in the oil-containing mud sand that comprises foreign material is added water cleans the lower crude oil of viscosity is at first separated;
First worm conveyor 201 is used for and will be sent to first ultrasonic cleaning equipment under the tangential force effect of oil-containing mud sand by screw shaft drive screw-blade;
First ultrasonic cleaning equipment 301 is used for the oil of oil-containing mud sand is separated with silt particle, and oil float is to the upper strata, and silt particle is deposited to the bottom;
Second ultrasonic cleaning equipment 3011 is used for the oil of oil-containing mud sand is separated with silt particle, and oil float is to the upper strata, and silt particle is deposited to the bottom;
Triple helical transfer roller 501 is used for silt particle is displaced in the blowpit;
Air-floating apparatus 701 is used for the You Heshui of oil-water mixture is separated, and refiltered oil also reuses water;
Fuel reserve tank 601 is used for storing the crude oil that described oil-containing mud sand treatment unit cleans out;
Use oil-containing mud sand treatment process of the present invention and device, not only saved and contained the necessary equipment that hot steam is provided of silt in the prior art, and manufacturing and the running cost of equipment further being simplified and reduced equipment, use the trommel screen equipment of the applicant's invention in addition, further improved screening efficiency.Particularly, the present invention has the following advantages:
1. throughput capacity is big, can clean the oil-containing mud sand that all comprises foreign material.Diameter is clean greater than can washing away of 80mm, and diameter can carry out the purpose that the rapid cleaning of multistep reaches environment protection fully fully less than 80mm's.
2. floor space is little, and the water power consumption is few, and running cost is low.
3. to handle oleaginousness up to standard fully for oil-containing mud sand.
4. less investment, convenient transportation, moveable convenient are carried out oil-containing mud sand efficiently and are cleaned.
Description of drawings
Fig. 1 is according to oil-containing mud sand treatment unit synoptic diagram of the present invention;
Fig. 2 is the trommel screen structural representation among Fig. 1;
Fig. 3 is the cylinder external structure synoptic diagram among Fig. 2;
Fig. 4 is the cylinder cut-away view synoptic diagram among Fig. 2;
Fig. 5 is the settling pit schematic cross-section among Fig. 2;
Fig. 6 is the worm conveyor cross section structure synoptic diagram among Fig. 1;
Fig. 7 is the ultrasonic cleaning equipment front view among Fig. 1;
Fig. 8 is the ultrasonic cleaning equipment side-view among Fig. 1;
Fig. 9 is the ultrasonic cleaning equipment cut-away view among Fig. 1;
Figure 10 is the ultrasonic cleaning equipment vertical view among Fig. 1;
Figure 11 is according to sedimentation device structural representation of the present invention;
Figure 12 is according to air-floating apparatus structural representation of the present invention;
Figure 13 is the side-view of air-floating apparatus among Figure 12;
Embodiment
In order further to understand the present invention, be described below in conjunction with the preferred embodiment of the invention of embodiment, but should be appreciated that these describe just to further specifying the features and advantages of the present invention, rather than to the restriction of claim of the present invention.
The invention provides a kind of purging method that comprises the oil-containing mud sand of foreign material, it mainly may further comprise the steps:
1, trommel screen screening step: the oil-containing mud sand that will comprise foreign material is sent into trommel screen; Comprise the oil-containing mud sand of foreign material through trommel screen, the bulk foreign material are discharged, oil-containing mud sand is delivered to first ultrasonic cleaning equipment through first worm conveyor;
2, the first ultrasonic cleaning step: in first ultrasonic cleaning equipment, at first agitator stirred oil-containing mud sand 20 minutes, stirring frequency is 45 rev/mins～50 rev/mins, stirring the cross section is 4%～6% of the first ultrasonic cleaning equipment vertical section, when being stirred to ten minutes oil-containing mud sand is applied sonic oscillation, oil-sand is separated;
3, the first air lift step: use air lift that the oil-containing mud sand of first ultrasonic cleaning equipment bottom deposition is delivered in first sedimentation device, first sedimentation device is used for the initial gross separation solid-liquid separation, be separated into water oil mixt and oil-sand mixture, isolated water oil mixt is entered in the air-floating apparatus, isolated oil-sand mixture is delivered to second ultrasonic cleaning equipment through second worm conveyor;
4, the second ultrasonic cleaning step: in second ultrasonic cleaning equipment, simultaneously oil-containing mud sand is applied sonic oscillation in stirring, oil-sand is separated; Separate simultaneously at oil-sand, add the medicament that impels the thorough medicament that separates of oil-sand or oil and sandstone conjugation are reduced through dosing mouth, the acceleration oil-sand separates;
5, the second air lift step: use air lift that the oil-containing mud sand of second ultrasonic cleaning equipment bottom deposition is delivered in second sedimentation device, second sedimentation device is used for the initial gross separation solid-liquid separation, be separated into water oil mixt and oil-sand mixture, isolated water oil mixt is entered in the air-floating apparatus, isolated oil-sand mixture is discharged.
More specifically, in trommel screen screening step, the oil-containing mud sand that at first will comprise foreign material is sent into trommel screen, when roller grizzly is just changeing, use internal high pressure water that oil-containing mud sand is washed simultaneously.This moment, water temperature was advisable for 35～50 degrees centigrade, and the trommel screen rotational frequency is that per minute 30～35 changes; More preferably, trommel screen forward rotation five minutes, the trommel screen backward rotation just can be discharged through discharge gate by the foreign material that particle diameter is bigger then.
In the first ultrasonic cleaning step and the second ultrasonic cleaning step, oil-containing mud sand is after entering washing unit, guarantee that the interior ultrasonic vibration plate of washing unit is below top water-level, agitator in the Vltrasonic device stirred ten minutes earlier, opens ultrasonic vibration plate then the common operation of ultrasonic vibration plate is comprehensively cleaned oil-containing mud sand.The first ultrasonic cleaning step and the difference of the second ultrasonic cleaning step are, need not to add greasy filth in the first ultrasonic cleaning step and separate medicament, separate medicament and need to add greasy filth in the second ultrasonic cleaning step.
In the air lift step, mainly be included in and open air-lift device after ultrasonic cleaning is finished, the oil-containing mud sand of suspension enters in the stripping tube under the drive of a large amount of high velocity airs, is entrained in first settler.The time that each air-lift device is opened is 1～15 minute, preferred five minutes; Can select the time of unlatching according to the silt particle sinkability, open once general per half an hour.The greasy filth that air lift proposes and the mixture amount of water and the useful volume of first sedimentation device adapt.Need to prove, can use same air lift in the first ultrasonic cleaning equipment effect and second ultrasonic cleaning equipment, also can use different air lifts separately respectively.When using different air lifts respectively separately, can use electric control gear to control the action of air lift.
In addition, in technical scheme of the present invention, can increase the air-floating apparatus step, in the air-floating apparatus step, by air dissolved pump the oily waste water water and air be mixed in 0.35Mpa pressure lower compression, form dissolved air water, deliver in the air-floating apparatus groove.Under the situation of unexpected relief pressure, the air that is dissolved in the water is separated out, form a large amount of microbubble groups, fully contact with tiny oil droplets, tiny oil droplets is compiled gradually in slow uphill process, its density is descended and floating to the water surface, by the oil scraping plate at top oil droplet is scraped oil extraction plate place again and discharge through oil outlet.The water of while owing to the reason bottom of gravity is discharged to posticum by spillway, finally gets back in the water tank.
According to the design of equipment, can in the action of first sedimentation device and the action of second sedimentation device, can use same air-floating apparatus, also can use different air-floating apparatus separately respectively.This air-floating apparatus is used for oily water separation; Air lift is used for profit and silt particle transports.
According to a second aspect of the present invention, the invention provides a kind of washing unit that comprises the oil-containing mud sand of foreign material, illustrate that according to Fig. 1-12 this comprises the washing unit of the oil-containing mud sand of foreign material below.
Referring to Fig. 1, this washing unit that comprises the oil-containing mud sand of foreign material comprises trommel screen 101, first worm conveyor 201, first ultrasonic cleaning equipment 301, first sedimentation device 401, second worm conveyor 2011, second ultrasonic cleaning equipment 3011, second sedimentation device 4011 and triple helical transfer roller 501, air-floating apparatus 701, fuel reserve tank 601 and water tank 801;
The diameter that trommel screen 101 is used for comprising the oil-containing mud sand of foreign material comes out greater than the particle screen selecting of 80mm, and the oil-sand mixture in the oil-containing mud sand that comprises foreign material is added water cleans the lower crude oil of viscosity is at first separated.
First worm conveyor 201 is used for and will be sent to first ultrasonic cleaning equipment under the tangential force effect of oil-containing mud sand by screw shaft drive screw-blade;
First ultrasonic cleaning equipment 301 is used for the oil of oil-containing mud sand is separated with silt particle, and oil float is to the upper strata, and silt particle is deposited to the bottom;
Second ultrasonic cleaning equipment 3011 is used for the oil of oil-containing mud sand is separated with silt particle, and oil float is to the upper strata, and silt particle is deposited to the bottom;
Triple helical transfer roller 501 is used for silt particle is displaced in the blowpit;
Air-floating apparatus 701 is used for the You Heshui of oil-water mixture is separated, and refiltered oil also reuses water;
Fuel reserve tank 601 is used for the crude oil that storage facilities cleans out;
Water tank (801) is used for storing water, and provides 35～50 degrees centigrade water for equipment.
Shown in Fig. 2-5, trommel screen 101 comprises sieve nest 103, settling pit 102, rotary power axle 104, banding pattern groove 110, cog belt 108, sieve plate 109, sub-sieve tooth 105, material inlet 106, material outlet 107, trommel screen oil-sand outlet 111, supporting leg 112, turning axle support 114, profile of tooth overflow plate 115 and oil spill outlet 113, material inlet 106 is positioned at cylinder sieve nest 103 1 sides, and material outlet 107 is positioned on the cylinder sieve nest 103 and with respect to a side of material inlet 106; When cylinder sieve nest 103 is just changeing, rotate through the cylinder sieve nest fritter oil-containing mud sand is scattered in the settling pit 102 of support of sieve nest below through the sieve aperture of sieve nest; When the cylinder sieve nest reverses, with the bulk foreign material through the material outlet dispatch to blow tank, this blow tank is arranged at the below of material outlet 107.
Shown in Fig. 2-4, sieve nest comprises that (this sieve plate can be cylindrical form to sieve plate 109, also can be other shapes.For facility, be called cylindrical sieve plate below in the lump), cog belt 108, sub-sieve tooth 105 and rotary power axle 104, cylindrical sieve plate 109 is steel sheet material and the sieve aperture that is furnished with same apertures at sieve plate, cog belt 108 is arranged on the cylindrical sieve plate outer ledge and is connected with 104 on rotary power axle, and the rotation by rotary power axle 104 drives whole sieve nest 103 runnings; In cylindrical sieve plate 109 inboards a plurality of sub-sieve teeth are set, sub-sieve tooth 105 arranges along cylindrical sieve plate 109 radial deflection certain angles.
When just changeing, sub-sieve tooth 105 is used for stirring the oil-containing mud sand that comprises foreign material; When counter-rotating, sub-sieve tooth 105 relies on the shear force of side direction that foreign material are pushed into the oil-sand outlet.
The banding pattern groove plays the normal rotation that the effect of supporting and leading guarantees sieve nest; Supporting leg 112 supports whole sieve nest and other parts; Acting as when the fluid thickness in the settling pit during greater than 50mm of profile of tooth overflow plate 115, crude oil will spill into the oil spill outlet from overflow plate 115, clean oil outlet pipe 602 by cylinder and flow in the fuel reserve tank 601.
With reference to Fig. 6 and shown in Figure 1, first worm conveyor 201 comprises oil-sand outlet 206, screw shaft 203, screw-blade 204, electric motor 205 and oil-sand import 202.Oil-sand import 202 is provided with flange, is connected the mode of connection of employing holding bolt with trommel screen oil-sand among Fig. 5 outlet 111; Screw shaft 203 and the first worm conveyor outer wall are coaxial arrangement, screw-blade 204 is 45 ° of pitch angle and is welded on the screw shaft 203 and spread pattern in the shape of a spiral, the pitch of screw-blade 204 is 80mm, screw shaft 203 and electric motor 205 link to each other by shaft coupling, and electric motor 205 is positioned at the right side of screw shaft 203; The oil-sand import 307 of first ultrasonic cleaning equipment among oil-sand outlet 206 and Fig. 7 is connected the mode of connection of employing holding bolt.First worm conveyor 201 and second worm conveyor, 2011 similar are no longer narrated at this.
In the rotary course of screw shaft 203, oil-containing mud sand can constantly be raised under the tangential force effect of screw-blade 204, finally arrives oil-sand and exports 206 places.
First ultrasonic cleaning equipment 301 and second ultrasonic cleaning equipment, 3011 similar are example at this with first ultrasonic cleaning equipment, describe.Shown in Fig. 7-10, ultrasonic cleaning equipment comprises oil-sand import 307, electric motor base for supporting 308, air lift inlet pipe 309, air lift main pipe line 310, stirring flabellum 311, stir shaft support 312, stir shaft 313 and the ultrasonic vibration plate 314 of ultrasonic cleaning tank body 315, stirring electric motor 302, service hatch 303, air lift oil-sand outlet 304, oil slick spillway 305, cat ladder 306, first ultrasonic cleaning equipment, and ultrasonic cleaning tank body 315 holds the oil-sand for the treatment of ultrasonic cleaning.Stir electric motor 302 and be fixed on the electric motor base for supporting 308, use bolting; Stirring electric motor 302 is connected with stir shaft 313 usefulness shaft couplings; Mid-way at the bottom of stir shaft support 312 is positioned at the opposite side of stir shaft 313 and is positioned at ultrasonic cleaning tank body jar; Stir flabellum 311 be fixed on the stir shaft 313 position can up-down adjustment; Electric motor base for supporting 308 is positioned at mid-way above the ultrasonic cleaning tank body 315; Service hatch 303 is positioned at lateral location above the ultrasonic cleaning tank body, and cat ladder 306 is arranged in the outer side of ultrasonic cleaning tank body 315, near service hatch 303; The oil-sand import 307 of first ultrasonic cleaning equipment is positioned at above the ultrasonic cleaning tank body 315, in the position of ultrasonic cleaning tank body 315 diameters 1/3rd; Ultrasonic vibration plate 314 is evenly arranged in the ultrasonic cleaning tank body 315 and surveys, apart from tank skin 50mm, and jar end 200mm; Air lift main pipe line 310 enters from ultrasonic cleaning tank body 315 sides, diameter 2/3rds places of ultrasonic cleaning tank body 315 be suspended from jar inner bottom part apart from jar at the bottom of 400mm; Air lift inlet pipe 309 is positioned at 40mm place, 310 times lateral extent bottoms of air lift main pipe line, and the air lift inlet pipe mouth of pipe is positioned in the middle of the air lift main pipe line 310 and mouth makes progress.
Shown in Figure 12-13, air-floating apparatus 701 comprises supporting leg 703, sloping plate deposition evacuation port 704, oil outlet 705, spillway 706, posticum 707, oil extraction plate 708, oil scraping plate 709, frizing band 710, water outlet 711, oil-water mixture import 712 and sedimentation casing 713.Water outlet 712 is positioned at the sidewall of sedimentation casing 713, apart from bottom 800mm; Supporting leg 703 is positioned on four jiaos of sedimentation casing 713 bottoms; Sloping plate deposition evacuation port 704 is positioned at sedimentation casing 713 bottoms, is used for regular emptying throw out; Oil outlet 705 is positioned at the opposite face of water outlet 711, apart from bottom 300mm; Spillway 706 is positioned at sedimentation box house one side, relies on the liquid level difference of the oil-water mixture that enters to make the water of bottom overflow from spillway 706; Water outlet 711 is near spillway 706, and the water that will overflow is guided to water outlet 711 places; Oil scraping plate 709 is fixed on the frizing band 710; Frizing band 710 relies on the power shaft that ceaselessly centers on self to drive oil scraping plate 709 oil is scraped oil extraction plate 708 places; Oil extraction plate 708 is positioned at a side of sedimentation casing 713 inner and close spillways 706.
In addition, this washing unit that comprises the oil-containing mud sand of foreign material can comprise electrical control system, and this electrical control system is used for electrical control, and this comprises the action of each parts of washing unit of the oil-containing mud sand of foreign material.
In whole cleaning process, first worm conveyor and second worm conveyor do not rest running.The screw-blade of rotation is passed material and is carried out worm conveyor and carry, and the power that material is not rotated with the worm conveyor blade is that material own wt and worm conveyor casing are to the friction resistance of material.The screw-blade that welds on the worm conveyor turning axle, the face type of blade has patterns such as entity face type, belt face type, blade face type according to the difference of convey materials.The screw shaft of worm conveyor has thrust bearing to give the axial counter-force of spiral with material in the terminal of material movement direction.
Worm conveyor comprises cylindric ectosome, round bar shape conveying roller, the butterfly-shaped blade of spiral and electric motor, the central axis of screw shaft and the central axis of cylindric ectosome are positioned at same straight line, cylindric ectosome is hollow cylinder, the round bar shape conveying roller places in the cylindric ectosome, the butterfly-shaped blade ring winding of spiral places around the round bar shape conveying roller, be used for along with screw shaft rotates, with mass transport to the first ultrasonic cleaning equipment top material import.
The second ultrasonic cleaning equipment structure is identical with the first ultrasonic cleaning equipment structure major parts, unique difference is, be provided with dosing mouth in the second ultrasonic cleaning equipment middle and upper part or top, be used for adding the medicament that impels the thorough medicament that separates of oil-sand or oil and sandstone conjugation are reduced.Generally adding dose is that oil-sand mixture per ton is suitable for adding 1 kilogram of medicament.The tensio-active agent that this impels the thorough medicament that separates of oil-sand or makes medicament oily and that the sandstone conjugation reduces can adopt the normally used oil-sand in this area to separate.
First sedimentation device of the present invention and the second sedimentation device similar.Use natural subsidence, sedimentation needs 5～60 minutes, just can reach the settlement separate efficient of optimum oil-sand in 20 minutes through testing preferred sedimentation; Carry out the subsequent flows journey after the sedimentation, the settling time of two sedimentation devices is consistent.
Fuel reserve tank is used for receiving collection and deposits crude oil, is mainly used in the crude oil of separating in storage cylinder cleaning, ultrasonic cleaning equipment, settler and the air-floating apparatus.In complete assembly, can use the liquidometer that places respectively in fuel reserve tank, water tank, the ultrasonic cleaning equipment, realize automatic measurement.For example, the effect of liquidometer is to report to the police automatically when 70% back that liquid level surpasses reserves in the fuel reserve tank, reminds crude oil to transport at once, cuts off the electricity supply automatically above 95% the time when liquid level, and the system that makes shuts down.The effect of liquidometer is the size that monitors aquifer yield in the water tank, opens the inlet channel valve when the water yield is lower than 30% automatically, and the replenishment system water yield is closed the inlet channel valve automatically and stopped moisturizing when the water yield is higher than 70%.The effect of liquidometer is the ultrasonic vibration plate of protection and control liquid level in the ultrasonic cleaning equipment.Be limited under the liquid level in system when operation ultrasonic plate top 100mm, on be limited to ultrasonic plate top 400mm, liquidometer carries out moisturizing to controller signals when liquid level is lower than down in limited time, stops moisturizing when liquid level is higher than in limited time to controller signals.
Use oil-containing mud sand treatment process of the present invention and device, throughput capacity ground cleans the oil-containing mud sand that all comprises foreign material greatly.Not only can wash away totally the oil-sand particle of diameter greater than 80mm, and diameter can carry out the purpose that the rapid cleaning of multistep reaches environment protection fully fully less than 80mm.This oil-containing mud sand treatment unit floor space is little, the water power consumption is few, running cost is low, and the intact oleaginousness of the oil-containing mud sand after the processing reaches environmental emission standard fully.
As above-mentioned, clear method and the device that has described the present invention's proposition in detail, and the technique effect of application technical scheme of the present invention.But this area those skilled in the art are appreciated that under the situation of the spirit and scope of the present invention that do not deviate from the claims definition, can make multiple modification in form and details.
Claims (2)
1. oil-containing mud sand treatment process, it is applicable to the cleaning of the oil-containing mud sand that comprises foreign material, it is characterized in that, comprises the next coming in order step:
(1) trommel screen screening step goes out bulk solid with oil-containing mud sand sub-argument under the effect of trommel screen;
(2) first ultrasonic cleaning steps are transported to oil-containing mud sand in first ultrasonic cleaning equipment by first worm conveyor;
(3) first air lift steps use air lift that the oil-containing mud sand of first ultrasonic cleaning equipment bottom deposition is delivered in first sedimentation device;
(4) second ultrasonic cleaning steps add the medicament that impels the thorough medicament that separates of oil-sand or oil and sandstone conjugation are reduced in ultrasonic cleaning, the acceleration oil-sand separates;
(5) second air lift steps: use air lift to divide dried up oil mixt and oil-sand mixture, isolated water oil mixt is entered in the air-floating apparatus, isolated oil-sand mixture is discharged;
It is characterized in that, also comprise the air-floating apparatus step: by air dissolved pump the oily waste water water and air is mixed in 0.35Mpa pressure lower compression, form dissolved air water, deliver in the air-floating apparatus groove; Under the situation of unexpected relief pressure, the air that is dissolved in the water is separated out, form a large amount of microbubble groups, fully contact with tiny oil droplets, tiny oil droplets is compiled gradually in slow uphill process, its density is descended and floating to the water surface, by the oil scraping plate at top oil droplet is scraped oil extraction plate place again and discharges through oil outlet, the water of while owing to the reason bottom of gravity is discharged to posticum by spillway, finally gets back in the water tank;
Trommel screen screening step: the oil-containing mud sand that will comprise foreign material is sent into trommel screen; Comprise the oil-containing mud sand of foreign material through trommel screen, the bulk foreign material are discharged, oil-containing mud sand is delivered to first ultrasonic cleaning equipment through first worm conveyor;
The described first ultrasonic cleaning step: in first ultrasonic cleaning equipment, at first agitator stirred oil-containing mud sand 20 minutes, stirring frequency is 45 rev/mins～50 rev/mins, stirring the cross section is 4%～6% of the first ultrasonic cleaning equipment vertical section, when being stirred to ten minutes oil-containing mud sand is applied sonic oscillation, oil-sand is separated;
The described first air lift step: use air lift that the oil-containing mud sand of first ultrasonic cleaning equipment bottom deposition is delivered in first sedimentation device, first sedimentation device is used for the initial gross separation solid-liquid separation, be separated into water oil mixt and oil-sand mixture, isolated water oil mixt is entered in the air-floating apparatus, isolated oil-sand mixture is delivered to second ultrasonic cleaning equipment through second worm conveyor;
The described second ultrasonic cleaning step: in second ultrasonic cleaning equipment, simultaneously oil-containing mud sand is applied sonic oscillation in stirring, oil-sand is separated; Separate simultaneously at oil-sand, add the medicament that impels the thorough medicament that separates of oil-sand or oil and sandstone conjugation are reduced through dosing mouth, the acceleration oil-sand separates;
The described second air lift step: use air lift that the oil-containing mud sand of second ultrasonic cleaning equipment bottom deposition is delivered in second sedimentation device, second sedimentation device is used for the initial gross separation solid-liquid separation, be separated into water oil mixt and oil-sand mixture, isolated water oil mixt is entered in the air-floating apparatus, isolated oil-sand mixture is discharged;
In trommel screen screening step, the oil-containing mud sand that at first will comprise foreign material is sent into trommel screen, when roller grizzly is just changeing, use internal high pressure water that oil-containing mud sand is washed simultaneously; This moment, water temperature was 35 degrees centigrade～50 degrees centigrade, and the trommel screen rotational frequency is that per minute 30～35 changes; Trommel screen forward (clockwise direction) rotated five minutes, oppositely (counterclockwise) rotation of trommel screen then;
Oil-containing mud sand guarantees the interior ultrasonic vibration plate of washing unit below top water-level after entering washing unit, the agitator in the Vltrasonic device stirred ten minutes earlier, opens ultrasonic vibration plate then common operation of ultrasonic vibration plate comprehensively cleaned oil-containing mud sand; Open air-lift device after ultrasonic cleaning is finished, the oil-containing mud sand of suspension enters in the stripping tube under the drive of a large amount of high velocity airs, is entrained in first settler; The time that each air-lift device is opened is 1～15 minute.
2. a right to use requires the oil-containing mud sand treatment unit of 1 described method, and it is applicable to the cleaning of the oil-containing mud sand that comprises foreign material, it is characterized in that,
Comprise trommel screen (101), first worm conveyor (201), first ultrasonic cleaning equipment (301), first sedimentation device (401), second worm conveyor (2011), second ultrasonic cleaning equipment (3011), second sedimentation device (4011) and triple helical transfer roller (501), air-floating apparatus (701), fuel reserve tank (601) and water tank (801);
The diameter that trommel screen (101) is used for comprising the oil-containing mud sand of foreign material comes out greater than the particle screen selecting of 80mm, and the oil-sand mixture in the oil-containing mud sand that comprises foreign material is added water cleans the lower crude oil of viscosity is at first separated.
First worm conveyor (201) is used for and will be sent to first ultrasonic cleaning equipment under the tangential force effect of oil-containing mud sand by screw shaft drive screw-blade;
First ultrasonic cleaning equipment (301) is used for the oil of oil-containing mud sand is separated with silt particle, and oil float is to the upper strata, and silt particle is deposited to the bottom;
First sedimentation device (401) is used for silt particle is deposited to bottom of device, and oil-water mixture can be excreted in the air-floating apparatus;
Second worm conveyor (2011) is used for and will be sent to first ultrasonic cleaning equipment under the tangential force effect of oil-containing mud sand by screw shaft drive screw-blade;
Second ultrasonic cleaning equipment (3011) is used for the oil of oil-containing mud sand is separated with silt particle, and oil float is to the upper strata, and silt particle is deposited to the bottom;
Second sedimentation device (4011) is used for silt particle is deposited to bottom of device, and oil-water mixture can be excreted in the air-floating apparatus;
Triple helical transfer roller (501) is used for silt particle is displaced in the blowpit;
Air-floating apparatus (701) is used for the You Heshui of oil-water mixture is separated, and refiltered oil also reuses water;
Fuel reserve tank (601) is used for storing the crude oil that described oil-containing mud sand treatment unit cleans out;
Water tank (801) is used for storing the required hot water of oil-containing mud sand treatment unit, and provides 35～50 degrees centigrade hot water for the oil-containing mud sand treatment unit.
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| CN105126661B (en) * | 2015-09-11 | 2017-08-25 | 北京生态岛科技有限责任公司 | Crude oil purification system and cleaning oil tank system |
| CN105668966B (en) * | 2016-03-24 | 2019-04-02 | 中国科学院生态环境研究中心 | A kind of short route sludge treatment system |
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| CN112958597B (en) * | 2021-02-26 | 2022-08-19 | 中国石油天然气集团有限公司 | Oil removing method, oil removing equipment and oil removing system for soaking, washing and screening oil sludge sand |
| CN112958596B (en) * | 2021-02-26 | 2022-08-19 | 中国石油天然气集团有限公司 | Multi-stage hot washing screening method and system for oil-containing sludge sundries |
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