CN106995718A - A kind of online processing unit of oil field settling tank tank bottom spoil disposal and processing method - Google Patents
A kind of online processing unit of oil field settling tank tank bottom spoil disposal and processing method Download PDFInfo
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- CN106995718A CN106995718A CN201710438226.3A CN201710438226A CN106995718A CN 106995718 A CN106995718 A CN 106995718A CN 201710438226 A CN201710438226 A CN 201710438226A CN 106995718 A CN106995718 A CN 106995718A
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- separator
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
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- Oil, Petroleum & Natural Gas (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
A kind of online processing unit of oil field settling tank tank bottom spoil disposal and processing method, belong to energy-conserving and environment-protective technical fiel.It is characterized in that：Including separator and supply unit, the charging aperture and settling tank of supply unit（1）Sewage draining exit（2）Connection, the discharging opening of supply unit is connected with the charging aperture of separator, the mixture export and settling tank of separator（1）Charging aperture connection, be additionally provided with sludge outlet on separator, supply unit is by settling tank（1）The sludge of bottom is delivered in separator, and sludge is cleaned and separated in separator, and the blended liquid outlet of the oil-water mixture after separation is fed again into settling tank（1）Interior, the mud mixture after separation is discharged by sludge outlet.This oil field online processing unit of settling tank tank bottom spoil disposal avoids causing substantial amounts of oil, water loss, reduces oil sludge generation；This oil field settling tank tank bottom spoil disposal on-line processing method handling process is simple, and easy to operate, crude oil recovery rate is up to more than 90% ~ 98%.
Description
Technical field
A kind of online processing unit of oil field settling tank tank bottom spoil disposal and processing method, belong to energy-conserving and environment-protective technical fiel.
Background technology
Oil field settling tank（Settling tank and sewage precipitation tank are dehydrated including crude oil）During prolonged use, the grains of sand,
The mechanical admixtures such as soil, suspension and other heavy oil components natural subsidence under gravity, are gradually accumulate in tank body bottom
Portion, forms tank bottom mud.This partial sludge is in flocculence, with very strong mobility.Tank bottom sludge is in a short time to whole heavy
Drop tank operation influence little, but as the lengthening of production time, tank bottom sludge can largely accumulate in tank bottom, have a strong impact on settling tank
Production run, therefore settling tank must periodically carry out spoil disposal processing.
The processing mode of settling tank tank bottom mud is generally artificial periodic cleaning or on-line continuous spoil disposal two ways.It is simple according to
Manually clear up, one side intractability is big, cleaning up cost is high, be on the other hand even more to need frequent shutdowns, have a strong impact on sedimentation
The tank operation cycle, and then influence oil field production.Therefore, current oil field is often combined with on-line continuous spoil disposal with periodically artificial cleaning
Mode come clear up settling tank tank bottom sink mud.
The actual sludge of settling tank on-line continuous spoil disposal discharge is oil, water, silt particle mixture, and wherein silt content only accounts for 1%
~5%V/V.The directly outer sludge-tank that drains into general at present carries out settlement treatment, and processing cost is high, difficulty is big, secondary pollution is serious, and
Cause substantial amounts of oil, water loss.
The content of the invention
The technical problem to be solved in the present invention is：Overcome the deficiencies in the prior art and can realize oil removing there is provided one kind, it is pre- de-
Water process, the oil field online processing unit of settling tank tank bottom spoil disposal and processing method for avoiding profit from losing.
The technical solution adopted for the present invention to solve the technical problems is：The oil field settling tank tank bottom spoil disposal handles dress online
Put, it is characterised in that：Including separator and supply unit, the charging aperture of supply unit is connected with the sewage draining exit of settling tank, defeated
The discharging opening of unit is sent to be connected with the charging aperture of separator, the mixture export of separator is connected with the charging aperture of settling tank, point
From sludge outlet is additionally provided with device, the sludge for settling pot bottom is delivered in separator by supply unit, and sludge is in separator
Clean and separate, the blended liquid outlet of the oil-water mixture after separation is fed again into settling tank, the mud mixture after separation
Discharged by sludge outlet.
It is preferred that, described separator includes oil water separator and separator for mud and water, the discharging opening and profit of supply unit
The charging aperture connection of separator, the mixture export of oil water separator is connected with the charging aperture of settling tank, the dirt of oil water separator
Mud outlet is connected with the charging aperture of separator for mud and water, and the sludge after separation is discharged by the sludge outlet of separator for mud and water.
It is preferred that, described oil water separator and separator for mud and water is cyclone separator.
It is preferred that, described separator includes oil water separator, the charging of the discharging opening and oil water separator of supply unit
Mouth connection, the mixture export of oil water separator is connected with the charging aperture of settling tank, and sludge outlet is arranged on oil water separator
Bottom.
It is preferred that, described oil water separator is cyclone separator.
It is preferred that, the middle and upper part of described separator is additionally provided with outlet of sewer.
It is preferred that, valve is provided between described sewage draining exit and supply unit.
It is preferred that, described supply unit is booster pump.
A kind of processing method of the above-mentioned online processing unit of oil field settling tank tank bottom spoil disposal, it is characterised in that：Including such as
Lower step：
Step（1）, under the conditions of 30 ~ 95 DEG C, the mixture containing crude oil, water and silt particle in settling tank is pressurized to by supply unit
After 0.2 ~ 0.8MPa and it is delivered in separator；
Step（2）, mixture carries out oil, water, husky separation in separator, and oil-containing mud sand is cleaned, and obtains and is free of mud
The low wet crude of sand and the husky aqueous mixtures of low oil-containing；
Step（3）, reversely conveying is back in settling tank at progress deposition dehydrating the low wet crude without silt particle again after separation
Reason, the husky aqueous mixtures water-containing sludge of low oil-containing is drained into sludge treatment pond after separation.
It is preferred that, step（2）Described in mixture first carried out in separator after water-oil separating, then carry out muddy water point
From.
Compared with prior art, the present invention is had an advantageous effect in that：
1st, the mixture of oil-containing, water, silt particle is delivered to by the supply unit of this online processing unit of oil field settling tank tank bottom spoil disposal
In separator, and separated in separator, the oil water mixture after separation is re-introduced into settling tank, so as to sludge
In crude oil reclaimed, it is to avoid cause it is substantial amounts of oil, water loss, reduce water, the oil content in outer spoil disposal sand, reduce dirt
The generation of greasy filth, saves follow-up Treatment of Sludge expense, reduces after-treatment pollution, and realizes Hand scarf, operates
Simply, and processing is convenient, the production in oil field is not interfered with.
2nd, oil water separator and separator for mud and water carry out water-oil separating and mud-water separation to mixture respectively, so as to isolate
Wastewater disposition to sewage treatment plant carry out sewage disposal, draining into sludge treatment pond outside sludge is handled, and processing is convenient, and
Follow-up processing cost is greatly reduced, the loss of a large amount of water is it also avoid.
3rd, oil water separator and separator for mud and water are cyclone separator, and flow field is moved using the strong turbulence in cyclone separator
And the presence of substantial amounts of water, the oil for being attached to silt particle surface is cleaned, it is to avoid the loss of crude oil, and reduce secondary
Processing pollution.
4th, separator middle and upper part is provided with outlet of sewer, can discharge the sewage isolated, it is to avoid the loss of water.
5th, booster pump is being delivered in separator after being pressurized to mixture, so as to facilitate the crude oil after separation and dirt
The conveying of water.
6th, the processing method of this online processing unit of oil field settling tank tank bottom spoil disposal realizes the online processing of sludge, and place
Science and engineering skill is simple, easy to operate, does not interfere with oil field production, and crude oil recovery rate reduces sludge oil up to more than 90% ~ 98%
Produce, save follow-up Treatment of Sludge expense, reduce after-treatment pollution.
7th, the recovery of crude oil is realized by water-oil separating, mud-water separation is carried out by mud-water separation, wastewater disposition is reduced
Amount, the outer draining rate of recovery is up to more than 85%.
Brief description of the drawings
Fig. 1 is the structural representation of the online processing unit of oil field settling tank tank bottom spoil disposal.
Fig. 2 is the structural representation of settling tank tank bottom spoil disposal online processing unit in oil field in embodiment 2.
In figure：1st, settling tank 2, sewage draining exit 3, valve 4, booster pump 5, oil water separator 6, separator for mud and water.
Embodiment
Fig. 1 is highly preferred embodiment of the present invention, and 1 ~ 2 the present invention will be further described below in conjunction with the accompanying drawings.
A kind of online processing unit of oil field settling tank tank bottom spoil disposal, including separator and supply unit, supply unit
Charging aperture is connected with the sewage draining exit 2 of settling tank 1, and the discharging opening of supply unit is connected with the charging aperture of separator, separator it is mixed
Close liquid outlet to connect with the charging aperture of settling tank 1, be additionally provided with sludge outlet on separator, supply unit is by the bottom of settling tank 1
Sludge is delivered in separator, and sludge is cleaned and separated in separator, and the blended liquid outlet of the oil-water mixture after separation is again
In secondary feeding settling tank 1, the mud mixture after separation is discharged by sludge outlet.This oil field settling tank tank bottom spoil disposal is handled online
The mixture of oil-containing, water, silt particle is delivered in separator by the supply unit of device, and is separated in separator, after separation
Oil water mixture is re-introduced into settling tank 1, so as to be reclaimed to the crude oil in sludge, it is to avoid cause substantial amounts of
Oil, water loss, reduce water, the oil content in outer spoil disposal sand, reduce the generation of oil sludge, save follow-up treatment of sludge expense
With, after-treatment pollution is reduced, and Hand scarf is realized, it is simple to operate, and processing is convenient, does not interfere with the life in oil field
Production.
Embodiment 1
As shown in Figure 1：Separator includes oil water separator 5 and separator for mud and water 6, and separator for mud and water 6 is arranged on a left side for settling tank 1
Side, oil water separator 5 is arranged between separator for mud and water 6 and settling tank 1, and the sewage draining exit 2 of settling tank 1 is arranged on settling tank 1
Bottom.
Supply unit is booster pump 4, and the charging aperture of booster pump 4 is connected with sewage draining exit 2, the discharging opening and profit of booster pump 4
The charging aperture connection of separator 5, booster pump 4 is delivered to profit after extracting oil, water, silt particle the mixture supercharging of the bottom of settling tank 1
In separator 5, so as to facilitate the conveying of later separation thing.Valve 3 is provided between booster pump 4 and sewage draining exit 2.
The mixture export of oil water separator 5 is connected with the top of settling tank 1, and under pressure, by water-oil separating
Oil-water mixture afterwards is delivered in settling tank 1 again, it is achieved thereby that the recovery to crude oil, it is to avoid the problem of oily loss,
Entrained crude oil in outer blowdown mud is reclaimed on the spot, crude oil recovery rate reduces the production of oil sludge up to more than 90 ~ 98%
It is raw, follow-up Treatment of Sludge expense is saved, after-treatment pollution is reduced.
The sludge outlet of oil water separator 5 is connected with the charging aperture of separator for mud and water 6, and by the mud mixture after separation
Send into separator for mud and water 6.The top of separator for mud and water 6 is provided with outlet of sewer, and bottom is provided with sludge outlet, separator for mud and water 6
Muddy water is separated, the sewage isolated is discharged by the outlet of sewer on top, and be delivered to sewage treatment plant and carried out at sewage
Manage, the sludge isolated is discharged by the sludge outlet of bottom, and be delivered to sludge treatment pond and handled, carry out mud-water separation,
Wastewater disposition amount is reduced, the outer draining rate of recovery is up to more than 85%, it is to avoid the problem of causing a large amount of water losses.
In the present embodiment, separator for mud and water 6 and oil water separator 5 are cyclone separator, using in cyclone separator
Strong turbulence flow field and the presence of a large amount of water cleaned to being attached to silt particle surface oil, the recovery of crude oil can either be realized,
The generation of oil sludge can be avoided again, the generation of oil sludge is reduced, and saved follow-up Treatment of Sludge expense, reduced secondary place
Reason pollution.
A kind of online processing unit of oil field settling tank tank bottom spoil disposal and processing method, comprise the following steps：
Step（1）, under the conditions of 30 ~ 95 DEG C, the mixture containing crude oil, water and silt particle in settling tank 1 is pressurized by supply unit
After to 0.2 ~ 0.8MPa and it is delivered in separator；
Under the conditions of 30 ~ 95 DEG C, booster pump 4 extracts the mixture containing crude oil, water and silt particle of the bottom of settling tank 1, and in supercharging
It is delivered to after being pressurized in pump 4 in oil water separator 5.
Step（2）, mixture carries out oil, water, husky separation in separator, and oil-containing mud sand is cleaned, and obtains not
The husky aqueous mixtures of low wet crude and low oil-containing containing silt particle；
Mixture enters in oil water separator 5, and silt particle surface oil is cleaned in oil water separator 5, while realizing oil
Water is separated, and obtains the husky aqueous mixtures two streams of low wet crude and low oil-containing without silt particle.Low oil-containing after separation
Husky aqueous mixtures are delivered in separator for mud and water 6 under pressure, and the husky aqueous mixtures of low oil-containing enter separator for mud and water 6
Inside silt particle surface oil is cleaned again, sewage and sludge are separated.
Step（3）, reversely conveying is back in settling tank 1 that to carry out sedimentation de- to the low wet crude without silt particle again after separation
Water process, the husky aqueous mixtures water-containing sludge of low oil-containing is drained into sludge treatment pond after separation.
The low wet crude without silt particle after separation is re-introduced into sedimentation by mixture export under pressure
In tank 1, it is achieved thereby that the recovery of crude oil.Sewage after separation passes through the outlet of sewer of separator for mud and water 6 under pressure
Discharge, and be delivered to sewage treatment plant and handled, the husky aqueous mixtures of the low oil-containing after separation pass through mud under pressure
The sludge outlet discharge of separator 6, and be delivered to processing in sludge treatment pond, so as to facilitate follow-up to sludge and sewage
Processing, reduces processing cost, and avoid oil, a large amount of losses of water.
Tank bottom mud drum oil-containing, water, silt particle mixture, wherein 98% is oil water mixture, 1% ~ 2% is silt particle, existing tank bottom
Spoil disposal is generally using the method directly gone sludge-tank to be settled, be exposed to the sun, after the sedimentation of excessive day, being exposed to the sun, top oil recovery,
Bottom sludge flocculate-centrifugal dehydration or flocculation-filter-press dehydration, form high oily sludge, height contains in sludge 40% ~ 70% and is
Oil.This method process tank bed mud has the drawback that：1st, sedimentation time length is deposited, it is necessary to large-scale sludge-tank, big for environment pollution
In environmental issue；2nd, a small amount of sludge reclaimed has become ageing oil because passing through the long-term chemical assistant for being exposed to the sun and adding,
It is difficult to reclaim, handles；3rd, sludge dewatering difficulty is big, and the sludge quantity of generation is big, and due to the excessive crude oil of oil-containing, sludge drying processing is difficult
Degree is big, requires high to dehydration equipment, and needs to add about 40% ~ 70% reality in substantial amounts of flocculant, the oily sludge of formation
For crude oil, therefore the sludge quantity on the one hand produced is big, and the Treatment of Sludge difficulty in another aspect later stage is very big.
Temperature first with tank bottom draining of this oil field online processing unit of settling tank tank bottom spoil disposal and processing method, profit
The high speed turbulence of water is cleaned to oily sludge in separator 5, and crude oil is peeled off into silt particle, further utilizes water-oil separating
Principle, is efficiently separated to oil, water, silt particle, finally gives low wet crude（Without silt particle）Water, silt particle with low oil-containing are mixed
Compound.The wet crude of recovery is back to settling tank 1 and handled, and obtains qualified crude oil；Water, silt particle mixture go sludge system to enter one
Step processing.The online processing unit and on-line processing method have as follows a little：1st, water, oil, the silt particle mixture externally arranged enter
The online processing of row, makes full use of the temperature of original sewage, beneficial to water-oil separating；2nd, substantial amounts of water and water-oil separating are made full use of
The turbulence effect of the high-velocity fluid of water, is cleaned to oil-containing mud sand in device 5, and the crude oil that will be attached to silt particle surface is peeled off, and is obtained
Obtain the silt particle of low oil-containing；3rd, efficiently separated by profit, obtain the wet crude without silt particle, return to the dewater treatment of settling tank 1
After obtain qualified crude oil, significantly reduce crude oil loss（80% ~ 95% crude oil in tank bottom spoil disposal is reclaimed）And it is follow-up
Pollution problem；4th, because the sludge oil content of generation is few, dehydration is easy, and follow-up further harmlessness disposing expense also can be big
Big reduction.
Embodiment 2
As shown in Figure 2：The difference of embodiment 2 and embodiment 1 is：Separator only includes oil water separator 5, oil water separator 5
Charging aperture connected with the discharging opening of booster pump 4, the mixture export of oil water separator 5 is connected with the middle and upper part of settling tank 1, point
Water-containing sludge from after is expelled to specified location by the sludge outlet of oil water separator 5, then carries out subsequent treatment.
The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But it is every without departing from technical solution of the present invention content, the technical spirit according to the present invention is to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (10)
1. a kind of online processing unit of oil field settling tank tank bottom spoil disposal, it is characterised in that：It is defeated including separator and supply unit
Send the charging aperture and settling tank of unit（1）Sewage draining exit（2）Connection, the discharging opening of supply unit and the charging aperture of separator connect
It is logical, the mixture export and settling tank of separator（1）Charging aperture connection, be additionally provided with sludge outlet, supply unit on separator
By settling tank（1）The sludge of bottom is delivered in separator, and sludge is cleaned and separated in separator, the oil mixing with water after separation
The blended liquid outlet of liquid is fed again into settling tank（1）Interior, the mud mixture after separation is discharged by sludge outlet.
2. the online processing unit of settling tank tank bottom spoil disposal in oil field according to claim 1, it is characterised in that：Described separation
Device includes oil water separator（5）And separator for mud and water（6）, the discharging opening and oil water separator of supply unit（5）Charging aperture connect
It is logical, oil water separator（5）Mixture export and settling tank（1）Charging aperture connection, oil water separator（5）Sludge outlet with
Separator for mud and water（6）Charging aperture connection, the sludge after separation is by separator for mud and water（6）Sludge outlet discharge.
3. the online processing unit of settling tank tank bottom spoil disposal in oil field according to claim 2, it is characterised in that：Described profit
Separator（5）And separator for mud and water（6）It is cyclone separator.
4. the online processing unit of settling tank tank bottom spoil disposal in oil field according to claim 1, it is characterised in that：Described separation
Device includes oil water separator（5）, the discharging opening and oil water separator of supply unit（5）Charging aperture connection, oil water separator（5）
Mixture export and settling tank（1）Charging aperture connection, sludge outlet is arranged on oil water separator（5）Bottom.
5. the online processing unit of settling tank tank bottom spoil disposal in oil field according to claim 4, it is characterised in that：Described profit
Separator（5）For cyclone separator.
6. the online processing unit of settling tank tank bottom spoil disposal in oil field according to claim 1, it is characterised in that：Described separation
The middle and upper part of device is additionally provided with outlet of sewer.
7. the online processing unit of settling tank tank bottom spoil disposal in oil field according to claim 1, it is characterised in that：Described blowdown
Mouthful（2）Valve is provided between supply unit（3）.
8. the online processing unit of oil field settling tank tank bottom spoil disposal according to claim 1 or 7, it is characterised in that：Described
Supply unit is booster pump（4）.
9. a kind of processing method of the online processing unit of oil field settling tank tank bottom spoil disposal described in any one of claim 1 ~ 8, its
It is characterised by：Comprise the following steps：
Step（1）, under the conditions of 30 ~ 95 DEG C, supply unit is by settling tank（1）The interior mixture containing crude oil, water and silt particle increases
It is depressed into after 0.2 ~ 0.8MPa and is delivered in separator；
Step（2）, mixture carries out oil, water, husky separation in separator, and oil-containing mud sand is cleaned, and obtains and is free of mud
The low wet crude of sand and the husky aqueous mixtures of low oil-containing；
Step（3）, reversely conveying is back to settling tank to the low wet crude without silt particle again after separation（1）Interior carry out deposition dehydrating
Processing, the husky aqueous mixtures water-containing sludge of low oil-containing is drained into sludge treatment pond after separation.
10. the online processing unit of settling tank tank bottom spoil disposal in oil field according to claim 9, it is characterised in that：Step（2）In
Described mixture is first carried out after water-oil separating in separator, then carries out mud-water separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710438226.3A CN106995718B (en) | 2017-06-06 | 2017-06-06 | Treatment method of oil field settling tank bottom sludge discharge online treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710438226.3A CN106995718B (en) | 2017-06-06 | 2017-06-06 | Treatment method of oil field settling tank bottom sludge discharge online treatment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106995718A true CN106995718A (en) | 2017-08-01 |
| CN106995718B CN106995718B (en) | 2020-03-10 |
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ID=59436184
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710438226.3A Active CN106995718B (en) | 2017-06-06 | 2017-06-06 | Treatment method of oil field settling tank bottom sludge discharge online treatment device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935212A (en) * | 2017-11-03 | 2018-04-20 | 武汉工程大学 | A kind of grease automatic separation method and device |
| CN110551514A (en) * | 2019-10-16 | 2019-12-10 | 河北宏龙环保科技有限公司 | Oil field exploitation solid waste disposal device and method |
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| CN104310745A (en) * | 2014-10-23 | 2015-01-28 | 西安华陆环保设备有限公司 | Device for treating fine granular sludge in oil field sedimentation equipment |
| CN204342740U (en) * | 2014-12-31 | 2015-05-20 | 南阳远大新能源开发有限公司 | Ageing oil recovery and processing system |
| CN105419862A (en) * | 2015-12-11 | 2016-03-23 | 淄博海润环境工程有限公司 | Coalescence type multiphase cyclone separator |
| CN206858493U (en) * | 2017-06-06 | 2018-01-09 | 中国石油大学(华东) | A kind of online processing unit of oil field settling tank tank bottom spoil disposal |
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2017
- 2017-06-06 CN CN201710438226.3A patent/CN106995718B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310745A (en) * | 2014-10-23 | 2015-01-28 | 西安华陆环保设备有限公司 | Device for treating fine granular sludge in oil field sedimentation equipment |
| CN204342740U (en) * | 2014-12-31 | 2015-05-20 | 南阳远大新能源开发有限公司 | Ageing oil recovery and processing system |
| CN105419862A (en) * | 2015-12-11 | 2016-03-23 | 淄博海润环境工程有限公司 | Coalescence type multiphase cyclone separator |
| CN206858493U (en) * | 2017-06-06 | 2018-01-09 | 中国石油大学(华东) | A kind of online processing unit of oil field settling tank tank bottom spoil disposal |
Cited By (2)
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| CN107935212A (en) * | 2017-11-03 | 2018-04-20 | 武汉工程大学 | A kind of grease automatic separation method and device |
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| Publication number | Publication date |
|---|---|
| CN106995718B (en) | 2020-03-10 |
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