CN106673397B - Oil-sludge separation device - Google Patents
Oil-sludge separation device Download PDFInfo
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- CN106673397B CN106673397B CN201710067749.1A CN201710067749A CN106673397B CN 106673397 B CN106673397 B CN 106673397B CN 201710067749 A CN201710067749 A CN 201710067749A CN 106673397 B CN106673397 B CN 106673397B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/01—Density
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Centrifugal Separators (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses an oil-sludge separation device, which comprises an oil-sludge pool, a first pump body, a vibrating screen, a first storage tank, a second pump body, a centrifugal machine, a second storage tank and a third pump body which are sequentially communicated, wherein, the oil sludge is fed into the vibrating screen through the first pump body from the oil sludge pool for first separation, solid-phase objects after the first separation are transported out, liquid-phase objects after the first separation enter the first storage tank for sedimentation, liquid-phase objects after the sedimentation enter the centrifuge through the second pump body for second separation, solid-phase objects after the second separation are transported out, and liquid-phase objects after the second separation enter the second storage tank, and a density tester is arranged in the second storage tank, and the liquid phase object is conveyed through the third pump body in a qualified manner after being detected by the density tester. The invention provides an oil-sludge separation device which can improve separation efficiency.
Description
Technical Field
The invention relates to the technical field of oil-sludge separation, in particular to an oil-sludge separation device.
Background
The oil sludge produced in the production process of the gas field contains various impurities, and when the oil sludge is transported to a treatment plant, the amount of the oil sludge to be treated is larger than that of the solid impurities, so that the treatment cost is very high. With the wide application of the traditional activated sludge process to the treatment of municipal sewage and industrial wastewater, the production of excess sludge is increasing day by day, so the development of a novel sludge reduction process is an urgent problem to be solved, and the sludge reduction refers to the reduction of the sludge yield in the sewage treatment process by changing the operating conditions of the existing process or adopting a certain technical means on the premise of ensuring that the sewage treatment effect is not affected, so the sludge reduction treatment can fundamentally reduce the sludge yield.
The scheme adopted in the prior art is that the filter press equipment is used for treating slurry, and the slurry is added with the chemicals and then is treated by the filter press. The filter press has the disadvantages of troublesome operation, high labor intensity, frequent replacement of filter cloth and small treatment capacity in a time period.
Therefore, how to provide an oil-sludge separation device to improve the separation efficiency is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a sludge separator which improves separation efficiency.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an oil sludge separation device, includes the oil sludge pool, the first pump body, shale shaker, first bin, the second pump body, centrifuge, second bin and the third pump body that communicate in proper order, wherein, fatlute is followed supply through the first pump body in the oil sludge pool carry out the first separation in the shale shaker, solid phase object after the first separation transports away, and liquid phase object after the first separation gets into deposit in the first storage tank, and liquid phase object after the deposit passes through the second pump body supplies carry out the second separation in the centrifuge, and solid phase object after the second separation transports away, and liquid phase object after the second separation gets into in the second storage tank, be provided with the density tester in the second storage tank, the warp the qualified passing through of liquid phase object after the density tester detects the third pump body is carried.
Preferably, the sludge separation device further comprises a backwash water tank and a fourth pump body, and the backwash water tank supplies water to the sludge basin through the fourth pump body.
Preferably, a heating device is further disposed on a communication pipeline between the first pump body and the vibrating screen.
Preferably, the heating device is a heat exchanger.
Preferably, the centrifuge is provided with a dosing device.
Preferably, the solid-phase object outlet of the centrifuge is further provided with a bypass pipe, and the bypass pipe is communicated with the second storage tank.
Preferably, the third pump body is further communicated with the first pump body, and when the liquid-phase object fails after being detected by the density tester, the liquid-phase object is conveyed to the inlet of the first pump body through the third pump body to be separated again.
Preferably, the apparatus for separating sludge described above further includes a backup pump body connected in parallel to the first pump body, the second pump body, and the third pump body at the same time.
Preferably, the solid-phase object after the first separation is transported to a vacuum drier for drying by a screw conveyor, and the solid-phase object after the second separation is transported to the vacuum drier for drying by the screw conveyor.
Preferably, the screw conveyor is a shaftless screw conveyor.
The invention provides an oil sludge separation device which comprises an oil sludge pool, a first pump body, a vibrating screen, a first storage tank, a second pump body, a centrifugal machine, a second storage tank and a third pump body which are sequentially communicated, wherein oil sludge is fed into the vibrating screen through the first pump body from the oil sludge pool to be subjected to first separation, solid-phase objects after the first separation are transported out, liquid-phase objects after the first separation enter the first storage tank to be precipitated, liquid-phase objects after the precipitation are fed into the centrifugal machine through the second pump body to be subjected to second separation, solid-phase objects after the second separation are transported out, liquid-phase objects after the second separation enter the second storage tank, a density tester is arranged in the second storage tank, and qualified liquid-phase objects after the detection of the density tester are transported through the third pump body.
Due to the adoption of the centrifugal machine, the centrifugal machine has the following advantages:
1. the one-time investment cost is low: the filter press has the disadvantages of troublesome operation, high labor intensity, frequent replacement of filter cloth and small treatment capacity in a time period;
2. the dosing cost is low;
3. the long-term use cost is low: the electricity consumption of the centrifuge is three to four kilowatts higher than that of a belt type machine, and thirty yuan is more than that of the centrifuge per day calculated according to eight hours of work per day. In the whole dehydration process of the centrifugal machine, water washing is not needed, only a small amount of water is used for automatically washing the internal spiral pusher when the centrifugal machine is stopped, and the filter presses are different, one-meter belt type machine needs six seventy cubic meters of water for filter belt backwashing every day, the filter presses need to wash filter cloth after the sludge is treated, the treatment effect is influenced, the treatment time is prolonged, and time and labor are wasted;
4. the adaptability to sewage properties is strong: no matter which sewage is treated by the centrifugal machine, some sewage can be treated without adding chemicals, and some sewage can be treated with a small amount of chemicals, particularly for sludge with oiliness, fat and high viscosity, the treatment difficulty of the filter press is high, filter cloth is easy to be blocked by sludge, sludge particles are too fine, and the filter cloth has oiliness and viscosity and is not easy to treat;
5. the centrifugal machine has reliable quality, stable performance and convenient installation and operation, does not need low-foot screw fixation, and can operate only by arranging equipment on a common foundation and connecting a feeding pipe;
6. the working environment is as follows: the whole dehydration process of the centrifugal machine is carried out under a closed condition, the working environment is good, and the whole environment is not good when the belt type machine is carried out under an open condition. Some plate frame machines need manual sludge unloading one by one after pressing dry sludge for a long time, which wastes time and labor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an oil-sludge separation apparatus according to an embodiment of the present invention.
In the above FIG. 1:
the device comprises a sludge tank 1, a first pump body 2, a vibrating screen 3, a first storage tank 4, a second pump body 5, a centrifuge 6, a second storage tank 7, a third pump body 8, a backwash water tank 9, a fourth pump body 10, a heating device 11, a dosing device 12 and a standby pump body 13.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an oil-sludge separation apparatus according to an embodiment of the present invention.
The oil sludge separation device provided by the embodiment of the invention comprises an oil sludge pool 1, a first pump body 2, a vibrating screen 3, a first storage tank 4, a second pump body 5, a centrifuge 6, a second storage tank 7 and a third pump body 8 which are sequentially communicated, wherein, fatlute carries out the first separation in supplying the shale shaker 3 through first pump body 2 from the oil mud pond 1, solid phase object after the first separation transports, liquid phase object after the first separation gets into first bin 4 and deposits, liquid phase object after the sediment feeds centrifuge 6 through the second pump body 5 and carries out the second separation in, solid phase object after the second separation transports, liquid phase object after the second separation gets into second bin 7, be provided with the density tester in the second bin 7, qualified the carrying through the third pump body 8 of liquid phase object after the density tester detects.
Due to the adoption of the centrifuge 6, the method has the following advantages:
1. the one-time investment cost is low: the filter press has the disadvantages of troublesome operation, high labor intensity, frequent replacement of filter cloth and small treatment capacity in a time period;
2. the dosing cost is low;
3. the long-term use cost is low: the centrifuge 6 consumes three to four kilowatts more than the belt machine and works eight hours a day for thirty yuan more per day. The centrifuge 6 does not need water washing in the whole dehydration process, only a small amount of water is used for automatically washing the internal spiral pusher when the machine is stopped, the filter presses are different, one-meter belt type machine needs six seventy cubic meters of water for filter belt backwashing every day, the filter presses need to clean filter cloth after the sludge is treated, the treatment effect is influenced, the treatment time is prolonged, and time and labor are wasted;
4. the adaptability to sewage properties is strong: no matter which sewage is treated by the centrifugal machine 6, some sewage can be treated without adding chemicals, and some sewage can be treated with a small amount of chemicals, particularly for sludge with oiliness, fat and high viscosity, the treatment difficulty of a filter press is high, filter cloth is easy to block by sludge, sludge particles are fine, and the sludge has oiliness and viscosity and is not easy to treat;
5. the centrifugal machine has reliable quality, stable performance and convenient installation and operation, does not need low-foot screw fixation, and can operate only by arranging equipment on a common foundation and connecting a feeding pipe;
6. the working environment is as follows: the whole dewatering process of the centrifuge 6 is carried out under a closed condition, the working environment is good, while the whole environment is not so good when the belt machine is carried out under an open condition. Some plate frame machines need manual sludge unloading one by one after pressing dry sludge for a long time, which wastes time and labor.
The main flow of the equipment is that the oil sludge firstly enters a vibrating screen for primary treatment, large particle solid phases such as cotton yarns and gloves in the oil sludge are removed, then the oil sludge enters a centrifugal machine for solid-liquid separation, and the separated solid phase and the separated liquid phase are respectively output.
In order to further optimize the scheme, the sludge separation device further comprises a backwash water tank 9 and a fourth pump body 10, wherein the backwash water tank 9 supplies water to the sludge basin 1 through the fourth pump body 10. Before sludge treatment, in order to prevent oil viscosity from being too high, the fourth pump body 10 can be started to drive liquid in the backwash water tank 9 into the sludge basin 1 for dilution, diluted sludge enters the vibrating screen 3 through the first pump body 2 to screen large-particle solid phases such as cotton yarn gloves and gravel, so that the centrifugal machine 6 is protected, the screened solid phases enter the spiral conveyor for external transportation, and the liquid phases enter the first storage tank 4 for precipitation again.
In order to further optimize the above scheme, a heating device 11 is further arranged on a communication pipeline between the first pump body 2 and the vibrating screen 3. In particular, the heating device 11 may be a heat exchanger. Because the outdoor temperature is low in winter, the oil sludge is basically in a solidification state at low temperature, the flowing property is poor, the heat exchanger can be used for exchanging heat of the oil sludge to 60-70 ℃, the viscosity of the oil sludge after temperature rise is reduced, the flowing property is improved, and the separation efficiency of the centrifuge 6 is improved.
In order to further optimize the scheme, a medicine adding device 12 is arranged on the centrifuge 6. The liquid treated by the centrifuge 6 enters a second storage tank 7, a density tester is mounted on the second storage tank 7, if the density of the liquid after the measurement treatment meets the standard treatment requirement, the liquid is transported out or transported to a backwashing water tank through a third pump body 8 for diluting the oil sludge, if the measured density does not meet the standard treatment requirement, the liquid is returned to the inlet of the first pump body 2 for secondary transportation treatment, namely the third pump body 8 is also communicated with the first pump body 2, when the liquid phase object is unqualified after the detection of the density tester, the liquid is transported to the inlet of the first pump body 2 through the third pump body 8 for re-separation, a dosing device 12 is added in a reserved dosing port before the centrifuge 6 for dosing treatment, and the liquid after the treatment is transported out and can be recycled and transported to a designated water tank. Of course, when the liquid returns to the inlet pipeline of the first pump body 2, the self-flushing function of the system is also realized, and when equipment in the system needs to be cleaned periodically, the treated water can be recycled, so that the self-cleaning function of the equipment can be realized.
In order to further optimize the above solution, the solid phase object outlet of the centrifuge 6 is further provided with a bypass pipe, which is communicated with the second storage tank 7. In the treatment process, the oil sludge waste liquid screened by the vibrating screen 3 is conveyed to a centrifuge 6 through a second pump body 5 for solid-liquid separation treatment, a solid phase enters a spiral conveyor for outputting, the liquid after high-speed separation enters a second storage tank 7, when the centrifuge 6 stops operating, a part of liquid at a solid phase outlet of the centrifuge 6 overflows, at the moment, a valve at the solid phase outlet can be closed, and the liquid enters the second storage tank 7 through a bypass pipe.
In order to further optimize the above solution, the above-mentioned sludge separation apparatus further includes a spare pump body 13 connected in parallel with the first pump body 2, the second pump body 5, and the third pump body 8. When the first pump body 2 fails, the pipeline is switched to the standby pump body 13 through the three-way valve, so that the online maintenance function of the first pump body 2 is realized; when the second pump body 5 breaks down, the pipeline is switched to the standby pump body 13 through the three-way valve, so that the online maintenance function of the second pump body 5 is realized; when the third pump body 8 breaks down, the pipeline is switched to the standby pump body 13 through the three-way valve, and the online maintenance function of the third pump body 8 is realized.
In order to further optimize the scheme, the solid-phase object after the first separation is conveyed to a vacuum drier for drying through a screw conveyer, and the solid-phase object after the second separation is conveyed to the vacuum drier for drying through the screw conveyer. Namely, if the water content of the treated solid phase does not reach the standard, the treated solid phase can be conveyed to a vacuum drying agent through a screw conveyor for drying, so that the water content of the treated sludge is not higher than 35 percent, and the requirement of filling the sludge in the landfill technology can be met.
Specifically, the screw conveyor is a shaftless screw conveyor. Compared with a frame chain slag remover, the shaftless screw conveyor has the following characteristics:
1. the design of the structural form of the shaftless screw conveyor ensures that the processed materials are circulated without blockage;
2. drive arrangement of shaftless screw conveyer: the driving device is arranged at one end of the screw conveyer, a motor reducer and a screw driving shaft are directly connected, a coupler is not needed, the dismounting and the maintenance are convenient, and the driving shaft can bear the load acted by the bending moment and the axial extrusion force simultaneously. The driving device (motor and speed reducer) adopts the structure of high-quality shaft-mounted speed reducer, and it has flexible operation, stable and reliable operation, no abnormal noise, and no leakage at all the joint surfaces of the speed reducer and the input and output shaft sealing positions. The driving motor is suitable for 380V, 3 phase and 50Hz, the protection grade of the driving motor is IP55 (outdoor type), and the insulation grade is F grade;
3. the U-shaped spiral groove of the shaftless spiral conveyor is formed by rolling a stainless steel plate, except that the feeding hole is opened, the rest part is closed by adding a flat cover along the spiral groove, and the whole transmission process is carried out in a sealed groove, so that the noise is reduced, and the discharge of peculiar smell is reduced; the bottom of the U-shaped groove is provided with a discharge port and is matched with a drainage ball valve.
The centrifugal machine 6 adopted by the oil-sludge separation device provided by the embodiment of the invention has the advantages of low one-time investment cost, stable performance, convenient installation and simple operation, the whole dehydration process is carried out in a closed environment, and the dosing cost is low: after the treatment, the medicine is not added when the treatment requirement is met, and the medicine is added when the treatment is not up to the standard; the three-way valve and the four-way valve are adopted in the system, so that the investment cost is saved, and the occupied space of the whole set of equipment is reduced; the slurry pump in the system flow adopts three functions, any pump has a fault, the online maintenance function can be realized, and the system can automatically switch the flow; the whole set of equipment also has the function of automatic cycle control.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. An oil-sludge separation device is characterized by comprising an oil-sludge pool, a first pump body, a vibrating screen, a first storage tank, a second pump body, a centrifugal machine, a second storage tank and a third pump body which are sequentially communicated,
wherein the content of the first and second substances,
oil sludge is fed into the vibrating screen from the oil sludge pool through a first pump body for first separation, solid-phase objects after the first separation are transported out, liquid-phase objects after the first separation enter the first storage tank for sedimentation,
feeding the liquid phase object after precipitation into the centrifuge through the second pump body for second separation, transporting the solid phase object after second separation out, and feeding the liquid phase object after second separation into the second storage tank,
a density tester is arranged in the second storage tank, the qualified liquid phase object is conveyed through the third pump body after being detected by the density tester, the liquid phase object is externally conveyed or conveyed into a backwashing water tank through the third pump body to be used for diluting the oil sludge,
the oil sludge pool also comprises a back flushing water tank and a fourth pump body, the back flushing water tank supplies water for the oil sludge pool through the fourth pump body,
a heating device is also arranged on a communication pipeline between the first pump body and the vibrating screen,
the solid phase object outlet of the centrifuge is also provided with a bypass pipe which is communicated with the second storage tank, when the centrifuge stops running, a part of liquid overflows from the solid phase outlet of the centrifuge, at the moment, the valve of the solid phase outlet is closed, the liquid enters the second storage tank through the bypass pipe,
the heating device is a heat exchanger, and the heating device is a heat exchanger,
the centrifuge is provided with a dosing device, the third pump body is also communicated with the first pump body, when a liquid phase object is unqualified after the detection of the density tester, the liquid phase object is conveyed to the inlet of the first pump body through the third pump body for re-separation and is conveyed again for treatment, the dosing device is added into a reserved dosing port before the liquid phase object enters the centrifuge for dosing treatment, the treated liquid is output, or the system self-flushing is carried out when the liquid returns to a pipeline at the inlet of the first pump body,
the pump also comprises a standby pump body which is connected with the first pump body, the second pump body and the third pump body in parallel.
2. The sludge separation apparatus of claim 1 wherein the solid phase objects after the first separation are transported by a screw conveyor to a vacuum dryer for drying and the solid phase objects after the second separation are transported by a screw conveyor to a vacuum dryer for drying.
3. The sludge separation apparatus of claim 2 wherein the screw conveyor is a shaftless screw conveyor.
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| CN201710067749.1A CN106673397B (en) | 2017-02-07 | 2017-02-07 | Oil-sludge separation device |
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| CN201710067749.1A CN106673397B (en) | 2017-02-07 | 2017-02-07 | Oil-sludge separation device |
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| CN108328899A (en) * | 2018-02-02 | 2018-07-27 | 深圳市中电加美电力技术有限公司 | A kind of steady feeding system of centrifuge for Treatment of Sludge |
| CN110203725A (en) * | 2019-06-03 | 2019-09-06 | 天津市蓝海华博科技发展有限公司 | Conveying device is vibrated in intelligent silt desiccation |
| CN110590090A (en) * | 2019-09-24 | 2019-12-20 | 延安万创能源科技有限公司 | Dirty oil sludge treatment equipment and treatment process |
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| RU2450865C2 (en) * | 2010-07-09 | 2012-05-20 | Общество с ограниченной ответственностью Специализированное профессиональное аварийно-спасательное формирование "ПРИРОДА" | Drilling mud processing and decontamination mobile plant |
| CN106082581A (en) * | 2016-08-19 | 2016-11-09 | 天津泛茵德泰石油环保科技发展股份有限公司 | Waste drilling mud minimizing zero-emission reutilization system and method |
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| CN101602566A (en) * | 2009-07-10 | 2009-12-16 | 北京惠博普能源技术有限责任公司 | A kind of novel process for comprehensively treating at oil field oil-containing mud |
| RU2450865C2 (en) * | 2010-07-09 | 2012-05-20 | Общество с ограниченной ответственностью Специализированное профессиональное аварийно-спасательное формирование "ПРИРОДА" | Drilling mud processing and decontamination mobile plant |
| CN102039301A (en) * | 2010-09-30 | 2011-05-04 | 昆明理工大学 | Oily sludge recycling and innocent comprehensive treatment process |
| CN106082581A (en) * | 2016-08-19 | 2016-11-09 | 天津泛茵德泰石油环保科技发展股份有限公司 | Waste drilling mud minimizing zero-emission reutilization system and method |
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Denomination of invention: An oil sludge separation device Effective date of registration: 20220727 Granted publication date: 20200612 Pledgee: Xi'an investment and financing Company limited by guarantee Pledgor: SHAANXI AEROSPACE DELIN SCIENCE AND TECHNOLOGY GROUP CO.,LTD. Registration number: Y2022610000439 |