CN114515746A - Oil sludge sand treatment device and process - Google Patents
Oil sludge sand treatment device and process Download PDFInfo
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- CN114515746A CN114515746A CN202111617993.3A CN202111617993A CN114515746A CN 114515746 A CN114515746 A CN 114515746A CN 202111617993 A CN202111617993 A CN 202111617993A CN 114515746 A CN114515746 A CN 114515746A
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- 239000004576 sand Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000008569 process Effects 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000001704 evaporation Methods 0.000 claims abstract description 7
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 23
- 238000007790 scraping Methods 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 11
- 238000002309 gasification Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 5
- 239000011490 mineral wool Substances 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 abstract description 27
- 230000032683 aging Effects 0.000 abstract description 8
- 238000005191 phase separation Methods 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 4
- 239000002657 fibrous material Substances 0.000 abstract description 4
- 239000013043 chemical agent Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
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- 238000002156 mixing Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 6
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- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of oil sludge sand treatment, in particular to a treatment device and a treatment process; crushing and sorting aging oil and/or oil-containing silt, removing the silt, crushing fiber materials, storing and conveying slurry oil, inputting high-temperature steam into a tank, wherein the temperature of the high-temperature steam is 300 ℃ and 700 ℃, the pressure of the high-temperature steam is 0.2-0.9MPa, and the flow rate of the high-temperature steam is 10-20m/s, conveying the slurry oil into the tank, and after the steam is contacted with the slurry oil, evaporating to separate an oil phase from a water phase and a water phase after the water and the oil in the slurry oil absorb heat, drying the oil in the slurry oil into solid powder and discharging, namely finishing the treatment of the silt oil. The method utilizes the methods of crushing, sorting, high-temperature steam and the like to carry out physical treatment on the oil-contaminated sand, does not need chemical agents, carries out oil-water two-phase separation by evaporating after water and oil in the oil-contaminated sand absorb heat, dries oil sludge in the oil-contaminated sand into solid powder and discharges the solid powder, has simple process and easy operation, and realizes the harmless and recycling treatment of the oil-contaminated sand with low cost.
Description
Technical Field
The invention relates to the technical field of oil sludge sand treatment, in particular to an oil sludge sand treatment device and process.
Background
The oily sludge refers to sludge mixed with crude oil, various finished oils, residual oil and other heavy oils. The oil-containing sludge is not inherent in nature, but is oil, soil, water and even a mixture mixed with other pollutants such as oil, soil, water and the like which are formed by the fact that the oil-containing sludge is leaked, blown, dripped and leaked to the ground, deposited to the ocean, the lake and the river bottom and mixed with the soil, the water and the like due to various accidents, improper operation, old equipment, damage, corrosion and the like of various industries, civilian use, personnel and the like related to crude oil and product oil in oil field exploitation, oil refining process, transportation, use, storage and the like. Oily sludge is harmful to human bodies and plants and water organisms, oil gas evaporated in the air can stimulate skin, eyes and respiratory organs, so that the land loses the function of plant growth, and the oily sludge is difficult to treat and repair and is one of main pollutants in the petroleum and petrochemical industry.
Common methods for treating oily sludge include hot water washing, thermochemical methods, solvent extraction methods, bioreactor methods, pyrolysis methods and the like, wherein the hot water washing is difficult to treat the sludge and sand with high oil content; the thermochemical method has high cost and is easy to generate secondary pollution; the solvent extraction method has long flow, complex process and high cost; bioreactor method bioreactor is expensive and difficult to culture proper strains; the investment of the pyrolysis equipment is large, the technical requirement is high, and the difficulty and the energy consumption are large when the pyrolysis is heated to high temperature in an anaerobic way. And the existing treatment device for the aging oil and the oily sludge has the defects of low recovery rate, high treatment cost, complex operation, no industrial production condition and the like, and the treated product cannot meet the environmental protection requirement. In addition, in view of the complex composition of the oil-containing silt, different conditions of oil fields and refineries, different composition of the oil-containing silt, different oil content, different stacking time and different treatment methods, if enterprises set different devices for treatment according to different conditions, the enterprises are brought with extremely high treatment cost.
Therefore, an oil sludge sand treatment device and process are provided.
Disclosure of Invention
The invention provides a general oil sludge sand treatment process and a general oil sludge sand treatment device for overcoming the defects of the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a process for treating oil-contained silt includes such steps as crushing and sorting aged oil and/or silt containing oil, removing impurities from silt, breaking fibres, storing and delivering the oil mud, delivering high-temp steam to tank at 300-700 deg.C, 0.2-0.9MPa and 10-20m/s, delivering the oil mud to tank, and contacting steam with oil mud to separate oil from water, where the water and oil in oil mud are evaporated to obtain solid powder.
The utility model provides an oil sludge sand processing apparatus that oil sludge sand processing technology adopted, includes feeder, breaker, jar body, oil water separator and screw conveyer, the output of feeder is connected with the input of breaker, the output of breaker is provided with separation runner and sieve with the input junction of the jar body, the top of the jar body is provided with driving motor, slurry oil feed inlet and gasification export, the gasification export is passed through the pipeline and is connected with oil water separator's input, driving motor's output runs through a jar internal connection and strikes off agitating unit, the inboard of the jar body is provided with the steam jet device, the powder export has been seted up to the bottom of the jar body, the powder export is connected with screw conveyer's input.
Specifically, the breaker includes the open box of top surface, the box is put on the shelf and is equipped with the mounting bracket, be provided with three rotating electrical machines on the mounting bracket, it is three the output of rotating electrical machines is connected with broken axle respectively, and is three be provided with a plurality of evenly distributed's on the broken axle respectively and cut the sword, it is three the epaxial cutting sword of breakage meshes mutually.
It is specific, strike off agitating unit and include that (mixing) shaft, a plurality of stirring paddle leaf and U type strike off the board, the top and the driving motor's of (mixing) shaft output are connected, even rigid coupling has a plurality of stirring paddle leaf on the (mixing) shaft, the board is struck off to the bottom rigid coupling U type of (mixing) shaft.
Specifically, the heat preservation cover has been cup jointed in the outside of jar body, be provided with the rock wool in the heat preservation cover.
The steam boiler is characterized by further comprising a steam boiler, and the output end of the steam boiler is connected with the input end of the steam spraying device through a pipeline.
The steam jet device comprises a main steam jet seat, a plurality of supports, a plurality of branch steam jet seats and a plurality of steam jet nozzles, wherein the main steam jet seat is provided with a plurality of branch steam jet seats in parallel at the upper side and the lower side, and is adjacent to the main steam jet seat and the branch steam jet seats, and the two branch steam jet seats are connected through a support, the main steam jet seat and the branch steam jet seats are fixedly connected with a plurality of steam jet nozzles, and the steam jet nozzles are fixedly connected with the main steam jet seat or the branch steam jet seats along the vertical axis rotation direction of the tank body.
Specifically, the steam injection directions of two adjacent steam injection nozzles are opposite, and the included angle between the directions of every two adjacent steam injection nozzles is 30-90 degrees.
Specifically, the oil-water separation device is connected with a collection oil tank and a collection water tank.
Specifically, the output end of the screw conveyor is connected with a solid collecting box.
The invention has the beneficial effects that:
(1) the method utilizes the methods of crushing, sorting, high-temperature steam and the like to carry out physical treatment on the oil sludge sand, does not need chemical agents, carries out oil-water two-phase separation by evaporating after water and oil in the oil sludge absorb heat, dries oil sludge in the oil sludge into solid powder and discharges the solid powder, has simple and easy operation process, short period and no pollution, and realizes harmless and recycling treatment of the oil sludge sand with low cost;
(2) the oil sludge sand treatment process can treat aging oil and/or oil-containing sludge sand, and is matched with the oil sludge sand treatment device, so that the drying efficiency is high, the drying time is short, and the drying effect is good.
Drawings
FIG. 1 is a flow chart of an oil sludge sand treatment process according to an embodiment of the present invention;
FIG. 2 is a top view of a crusher according to an embodiment of the present invention;
FIG. 3 is a schematic view of the internal structure of a crusher according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a can body according to an embodiment of the invention;
fig. 5 is a schematic structural view of a steam nozzle according to an embodiment of the present invention.
Reference numerals: the device comprises a box body 1, a mounting frame 2, a rotating motor 3, a crushing shaft 4, a shearing blade 5, a driving motor 6, a slurry oil feeding hole 7, a gasification outlet 8, a stirring shaft 9, stirring blades 10, a U-shaped scraping plate 11, a branch steam spraying seat 12, a support frame 13, a main steam spraying seat 14, an oil-water separation device 15, a collecting oil tank 17, a collecting water tank 16, a steam boiler 18, a screw conveyor 19, a collecting solid box 20 and a steam spraying nozzle 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to the attached figure 1, the aging oil treatment process comprises the steps of conveying the aging oil into a crusher, removing impurities of oily sludge, crushing and uniformly dispersing fiber materials, storing and conveying oily slurry under the combined action of a sorting rotating wheel and a sieve plate, firstly inputting high-temperature steam into a tank, wherein the temperature of the high-temperature steam is 300 ℃, the pressure of the high-temperature steam is 0.2MPa, and the flow rate of the high-temperature steam is 10m/s, then conveying the oily slurry into the tank, then evaporating water and oil in the oily slurry after absorbing heat under the combined action of a driving motor 6 and a scraping and stirring device to perform oil-water two-phase separation, drying the oily slurry into solid powder, and discharging the solid powder, thus finishing the treatment of oily sand.
Example 2
Referring to the attached figure 1, the process for treating the aging oil and the oil-containing silt comprises the steps of conveying the aging oil and the oil-containing silt into a crusher, removing impurities of the oil-containing silt, crushing fiber materials, uniformly dispersing, storing and conveying oil slurry under the combined action of a sorting rotating wheel and a sieve plate, inputting high-temperature steam into a tank, wherein the temperature of the high-temperature steam is 600 ℃, the pressure of the high-temperature steam is 0.9MPa, the flow rate of the high-temperature steam is 20m/s, conveying the oil slurry into the tank, contacting the high-temperature steam with the oil slurry under the combined action of a driving motor 6 and a scraping and stirring device, evaporating water and oil in the oil slurry to perform oil-water two-phase separation after absorbing heat, drying the oil sludge in the oil slurry into solid powder, and discharging the oil-containing silt, so that the treatment of the oil-containing silt is completed.
Example 3
Referring to the attached drawing 1, the process for treating the oil sludge sand comprises the steps of conveying the oil sludge sand into a crusher, removing impurities of oil-containing sludge, crushing and uniformly dispersing fiber materials, storing and conveying oil sludge slurry under the combined action of a sorting rotating wheel and a sieve plate, inputting high-temperature steam into a tank, wherein the temperature of the high-temperature steam is 700 ℃, the pressure of the high-temperature steam is 0.5MPa, the flow rate of the high-temperature steam is 15m/s, conveying the oil sludge slurry into the tank, contacting the high-temperature steam with the oil sludge under the combined action of a driving motor 6 and a scraping and stirring device, evaporating water and oil in the oil sludge after absorbing heat, carrying out oil-water two-phase separation, drying the oil sludge in the oil sludge into solid powder, and discharging the solid powder, thus finishing the treatment of the oil sludge sand.
Example 4
The oil sludge sand treatment device adopted by the oil sludge sand treatment process comprises a feeding machine, a crusher, a tank body, an oil-water separation device 15 and a spiral conveyer 19, wherein the output end of the feeding machine is connected with the input end of the crusher, a separation rotating wheel and a sieve plate are arranged at the joint of the output end of the crusher and the input end of the tank body, a driving motor 6, an oil sludge feed inlet 7 and a gasification outlet 8 are arranged at the top of the tank body, the gasification outlet 8 is connected with the input end of the oil-water separation device 15 through a pipeline, a scraping and stirring device is connected with the output end of the driving motor 6 penetrating through the interior of the tank body, a steam spraying device is arranged on the inner side of the tank body, a powder outlet is formed in the bottom of the tank body, and the powder outlet is connected with the input end of the spiral conveyer 19.
Further, the output end of the crusher according to the invention is connected to the slurry feed opening 7.
Further, the feeder is a sludge feeding pump and is used for conveying the aging oil and/or the oil-containing sludge sand into the crusher for crushing.
Furthermore, an overflow port is arranged above the side surface of the tank body and below the oil slurry feeding port 7.
Specifically, refer to fig. 2-3, the breaker includes the open box 1 in top surface, box 1 is put on the shelf and is equipped with mounting bracket 2, be provided with three rotating electrical machines 3 on the mounting bracket 2, it is three the output of rotating electrical machines 3 is connected with broken axle 4 respectively, and is three be provided with a plurality of evenly distributed's on the broken axle 4 respectively and cut sword 5, it is three cut sword 5 and mesh mutually on the broken axle 4.
Furthermore, the three rotating motors 3 related to the invention have different rotating speeds, and the materials can be fully crushed by using the three rotating motors 3 with different rotating speeds.
Furthermore, a sludge feeding pump is arranged between the crusher and the sludge feeding port 7, so that the sludge can be conveniently conveyed to the inside of the tank body.
Specifically, strike off agitating unit and include that (mixing) shaft 9, a plurality of stirring paddle leaf 10 and U type strike off board 11, the top and the output of driving motor 6 of (mixing) shaft 9 are connected, even rigid coupling has a plurality of stirring paddle leaf 10 on the (mixing) shaft 9, board 11 is struck off to the bottom rigid coupling U type of (mixing) shaft 9.
Furthermore, the scraping and stirring device comprises a stirring shaft 9, stirring blades 10 and a U-shaped scraping plate 11, the stirring blades 10 can be used for stirring the oil-mud slurry, so that high-temperature steam is fully contacted with the oil-mud slurry, the high-temperature steam and water in the oil-mud slurry exchange heat, the water and oil in the oil-mud slurry absorb heat and then instantaneously evaporate, oil sludge in the oil-mud slurry is dried, solid substances are crushed into fine particles, and compared with the traditional hot water and ultrasonic wave synergistic action mode, the device adopts the high-temperature steam to directly treat the oil-mud slurry, can accelerate the treatment time, and is high in drying efficiency, short in time and good in drying effect; in addition, the U-shaped scraping plate 11 is adopted to scrape the solid powder on the bottom surface inside the tank body, so that the dried solid powder is prevented from being stuck inside the tank body and is discharged out of the tank body in time.
Specifically, the heat preservation cover has been cup jointed in the outside of jar body, be provided with the rock wool in the heat preservation cover.
Further, rock wool is filled in the heat-insulation sleeve, and the heat-insulation sleeve is used for insulating the tank body.
The steam boiler is characterized by further comprising a steam boiler, and the output end of the steam boiler is connected with the input end of the steam spraying device through a pipeline.
Further, the present invention relates to a steam boiler 18 for generating high temperature steam, which is then injected through a steam injection nozzle via a pipe and a steam injection device.
Specifically, refer to fig. 4-5, the steam jet apparatus includes that the owner spouts vapour seat 14, a plurality of supports, a plurality of branches spout vapour seat 12 and a plurality of steam jet, the upper and lower both sides parallel arrangement of the main vapour seat 14 spouts vapour seat 12 in a plurality of branches, and is adjacent the main vapour seat 14 spouts with the branch spouts between the vapour seat 12 in a plurality of branches, through the leg joint between two branches spout vapour seat 12, the main vapour seat 14 of spouting with the branch spouts a plurality of steam jet of rigid coupling on the vapour seat 12 in a plurality of branches, wherein, spout the even rigid coupling of steam jet along jar body vertical axis direction of rotation on the main vapour seat 14 or branch spouts vapour seat 12.
Specifically, the steam injection directions of two adjacent steam injection nozzles are opposite, and the included angle between the directions of every two adjacent steam injection nozzles is 30-90 degrees.
Furthermore, the main steam injection seat 14, the support, the branch steam injection seats 12 and the steam injection nozzles 21 are provided, and meanwhile, the included angle between the directions of the adjacent steam injection nozzles 21 is 30-90 degrees, so that high-temperature steam is comprehensively injected into the tank body, and the oil-slurry drying is realized without dead angles.
Further, the steam injection device of the present invention further comprises a support frame 13 for mounting the steam injection device on the inner wall of the tank body.
Specifically, the oil-water separation device 15 is connected to a collection oil tank 17 and a collection water tank 16.
Specifically, the output end of the screw conveyor is connected with a solids collection tank 20.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. A process for treating oil sludge sand includes such steps as crushing and sorting aged oil and/or oil-contained sand, removing impurities from oil sludge sand, breaking fibres, storing and delivering oil sludge, introducing high-temp steam at 300-700 deg.C and 10-20m/s to tank, delivering oil sludge to tank, and after steam is contacted with oil sludge, evaporating to separate oil from water, drying oil sludge to become solid powder.
2. The oil sludge sand treatment device adopted by the oil sludge sand treatment process according to claim 1, comprising a feeding machine, a crusher, a tank body, an oil-water separation device and a screw conveyor, and is characterized in that the output end of the feeding machine is connected with the input end of the crusher, a separation rotating wheel and a sieve plate are arranged at the joint of the output end of the crusher and the input end of the tank body, a driving motor, an oil sludge feeding port and a gasification outlet are arranged at the top of the tank body, the gasification outlet is connected with the input end of the oil-water separation device through a pipeline, the output end of the driving motor penetrates through the tank body and is connected with a scraping stirring device, a steam spraying device is arranged on the inner side of the tank body, a powder outlet is formed in the bottom of the tank body, and the powder outlet is connected with the input end of the screw conveyor.
3. The oil sludge sand treatment device adopted by the oil sludge sand treatment process according to claim 3, wherein the crusher comprises a box body with an open top surface, a mounting frame is erected on the box body, three rotating motors are arranged on the mounting frame, the output ends of the three rotating motors are respectively connected with crushing shafts, a plurality of uniformly distributed shearing blades are respectively arranged on the three crushing shafts, and the shearing blades on the three crushing shafts are meshed with each other.
4. The device for treating the oil sludge sand used in the oil sludge sand treatment process according to claim 3, wherein the scraping and stirring device comprises a stirring shaft, a plurality of stirring blades and a U-shaped scraping plate, the top end of the stirring shaft is connected with the output end of the driving motor, the stirring shaft is uniformly and fixedly connected with the plurality of stirring blades, and the bottom of the stirring shaft is fixedly connected with the U-shaped scraping plate.
5. The oil sludge treatment device adopted in the oil sludge treatment process according to claim 3, wherein a heat preservation sleeve is sleeved outside the tank body, and rock wool is arranged in the heat preservation sleeve.
6. The apparatus for treating oil sludge sand used in the oil sludge sand treatment process according to claim 3, further comprising a steam boiler, wherein an output end of the steam boiler is connected with an input end of the steam injection device through a pipeline.
7. The oil sludge sand treatment device adopted by the oil sludge sand treatment process according to claim 6, wherein the steam injection device comprises a main steam injection seat, a plurality of supports, a plurality of branch steam injection seats and a plurality of steam injection nozzles, the upper side and the lower side of the main steam injection seat are provided with the plurality of branch steam injection seats in parallel, the adjacent main steam injection seat and the branch steam injection seats are connected through the supports, the main steam injection seat and the branch steam injection seats are fixedly connected with the plurality of steam injection nozzles, and the steam injection nozzles are uniformly and fixedly connected onto the main steam injection seat or the branch steam injection seats along the rotation direction of the vertical axis of the tank body.
8. The apparatus for treating sludge sand used in the treatment process according to claim 7, wherein the steam injection directions of the two adjacent steam injection nozzles are opposite, and the included angle between the directions of each of the adjacent steam injection nozzles is 30 to 90 °.
9. The oil sludge sand treatment device adopted in the oil sludge sand treatment process according to claim 3, wherein the oil-water separation device is connected with a collection oil tank and a collection water tank.
10. The oil sludge sand treatment device adopted in the oil sludge sand treatment process according to claim 3, wherein the output end of the screw conveyor is connected with a solid collecting box.
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| CN202111617993.3A CN114515746A (en) | 2021-12-27 | 2021-12-27 | Oil sludge sand treatment device and process |
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| CN202111617993.3A CN114515746A (en) | 2021-12-27 | 2021-12-27 | Oil sludge sand treatment device and process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2627810A (en) * | 2023-03-03 | 2024-09-04 | Henry Coulton Richard | Method and apparatus for separating sand from slurry |
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| CN108059311A (en) * | 2017-11-27 | 2018-05-22 | 辽河石油勘探局 | A kind of mixing disposal of oily sludge system and method |
| CN108409074A (en) * | 2018-01-23 | 2018-08-17 | 北京北控京仪环保科技有限公司 | A kind of disposal of oily sludge system and technique |
| CN111778059A (en) * | 2020-07-07 | 2020-10-16 | 中国石油大学(华东) | Oil sludge sand pre-separation-oil recovery-post-treatment system and process |
| CN111875227A (en) * | 2020-08-05 | 2020-11-03 | 江苏联兴成套设备制造有限公司 | Method for promoting oil removal in oily sludge |
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| GB2627810A (en) * | 2023-03-03 | 2024-09-04 | Henry Coulton Richard | Method and apparatus for separating sand from slurry |
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