CN110394340A - Tank washing equipment and system - Google Patents
Tank washing equipment and system Download PDFInfo
- Publication number
- CN110394340A CN110394340A CN201910686827.5A CN201910686827A CN110394340A CN 110394340 A CN110394340 A CN 110394340A CN 201910686827 A CN201910686827 A CN 201910686827A CN 110394340 A CN110394340 A CN 110394340A
- Authority
- CN
- China
- Prior art keywords
- tank
- water pump
- liquid
- washing equipment
- water
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/0045—Plurality of essentially parallel plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/0856—Cleaning of water-treatment installations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The application provides a kind of tank washing equipment and system, including the first water pump, inclined plate settler, water tank, the second water pump and cleaning sprayer.First water pump is connect with the bottom of tank body to be cleaned, for the liquid in tank body to be cleaned to be delivered to inclined plate settler.Inclined plate settler is connect with water tank, for the liquid after inclined plate settler settlement treatment to be delivered to water tank.The connection of the bottom of second water pump and water tank, and connect with the cleaning sprayer being set in tank body to be cleaned, it sprays for the liquid in water tank to be delivered to cleaning sprayer, is cleaned with treating cleaning tank body.By the cooperation of the first water pump, inclined plate settler, water tank, the second water pump and cleaning sprayer, rapid subsidence filtering is carried out to the cycling use of water during cleaning of evaporator.So great purge amount or quick washing and cleaning operation can be carried out using the component devices of smaller size smaller, and sedimentation and filtering effect is good, the cleaning quality and conveying equipment service life of raising.
Description
Technical field
This application involves oil equipment technical fields, in particular to a kind of tank washing equipment and system.
Background technique
In field of petroleum exploitation, converts in the drilling well need of work for completing a well head to next well head and work on
When, since different well head geological conditions are different, the mud degree of mixing that drilling well generates is also different, it is necessary to drilling mud storage tank
It is used again in next well head after being cleaned.
In order to reduce the water consumption of cleaning of evaporator process, tank washing equipment can configure some filterings and cycling use of water component, for example, asking
Referring to Fig.1, delivery pump often is connected in tank base to be cleaned in the prior art, delivery pump is by the Liquid extracting in tank body to be cleaned
It is injected into the bottom for standing the first settling banker of tank.Mud gradually precipitates in the first settling banker, more pure liquid after precipitating
The second settling banker for being spilled over to from the first settling banker top and standing tank is known from experience, then again by fresh water pump by the second settling banker bottom
The cleaning sprayer that Liquid extracting is delivered in tank body to be cleaned is recycled.
But in above-mentioned tank washing equipment, standing tank settling velocity is slower, is needing Rapid Cleaning or flushing dose biggish
In scene, needs to configure very very large standing tank and be just able to satisfy cleaning demand.Also, stand tank staticly settles effect not
It is good, still there are a large amount of impurity after precipitating, has seriously affected the cleaning quality of cycling use of water and the service life of conveying equipment.
Summary of the invention
In order to overcome above-mentioned deficiency in the prior art, the application's is designed to provide a kind of tank washing equipment, comprising: the
One water pump, inclined plate settler, water tank, the second water pump and cleaning sprayer；
First water pump is connect with the bottom of tank body to be cleaned, for the liquid in the tank body to be cleaned to be delivered to
The inclined plate settler；
The inclined plate settler is connect with the water tank, for will be by the liquid after the inclined plate settler settlement treatment
Body is delivered to the water tank；
Second water pump is connect with the bottom of the water tank, and described clear in the tank body to be cleaned with being set to
Spray head connection is washed, is sprayed for the liquid in the water tank to be delivered to the cleaning sprayer, to the tank body to be cleaned
It is cleaned.
Optionally, in above-mentioned tank washing equipment, filtering is also connected between first water pump and the tank body to be cleaned
Device, the filter are used to be filtered the dirty liquid extracted out from the tank body to be cleaned by strainer.
Optionally, in above-mentioned tank washing equipment, the filter is provided with dismountable strainer.
Optionally, in above-mentioned tank washing equipment, the tank washing equipment further includes sedimentation agent adding set, and the sedimentation agent adds
Feeder apparatus includes sedimentation agent delivery outlet, which is connected between first water pump and the inclined plate settler
On liquid delivery path, sedimentation is added in the liquid that the sedimentation agent adding set is used for before entering the inclined plate settler
Agent.
Optionally, in above-mentioned tank washing equipment, the inclined plate settler includes tube settler pond and diaphragm pump；
The liquid outlet of first water pump is set to the top in the tube settler pond；
The diaphragm pump is connected to the bottom in the tube settler pond, for that will be settled down to the tube settler bottom of pond portion
The tube settler pond is discharged in sediment.
Optionally, in above-mentioned tank washing equipment, the tank washing equipment further includes liquid level sensor and and water pump control unit；
The liquid level sensor is set in the water tank, for detecting the liquid stock in the water tank；
The water pump control unit is electrically connected with the liquid level sensor, and respectively with first water pump and the second water pump
Electrical connection, the liquid stock for being detected according to the liquid level sensor control the work of first water pump and the second water pump
State.
Optionally, in above-mentioned tank washing equipment, the liquid level sensor is ultrasonic level gage, the ultrasonic level gage
It is set to the top of the water tank.
Optionally, in above-mentioned tank washing equipment, first water pump is peristaltic pump.
Optionally, in above-mentioned tank washing equipment, second water pump is high pressure vertical water pump.
The another object of the application is to provide a kind of cleaning of evaporator system, including the tank washing equipment provided by the present application and bottom
Seat, all parts of the tank washing equipment in addition to the cleaning sprayer are using skid-mounted type structure setting on same pedestal.
In terms of existing technologies, the application has the advantages that
Tank washing equipment provided by the present application and system, by the first water pump, inclined plate settler, water tank, the second water pump and
The cooperation of cleaning sprayer carries out rapid subsidence filtering to the cycling use of water during cleaning of evaporator.It so can be using smaller size smaller
Component devices carry out great purge amount or quick washing and cleaning operation, and sedimentation and filtering effect is good, the cleaning quality of raising and conveying
Service life of equipment.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the schematic diagram of prior art tank washing equipment；
Fig. 2 is one of the schematic diagram of tank washing equipment provided by the embodiments of the present application；
Fig. 3 is the two of the schematic diagram of tank washing equipment provided by the embodiments of the present application；
Fig. 4 is the circuit connection diagram of water pump control unit provided by the embodiments of the present application.
Icon: 1- tank body to be cleaned；2- cleaning sprayer；4- filter；The first water pump of 5-；6- sedimentation agent adding set；8-
Inclined plate settler；9- diaphragm pump；11- water tank；The second water pump of 12-；13- liquid level sensor；14- water pump control unit.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiments herein provided in the accompanying drawings is not intended to limit below claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on the embodiment in the application, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model of the application protection
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present application, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description the application and simplify description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as the limitation to the application.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in this application.
Referring to figure 2., Fig. 2 is a kind of schematic diagram of tank washing equipment provided in this embodiment, which includes first
Water pump 5, inclined plate settler 8, water tank 11, the second water pump 12 and cleaning sprayer 2.
First water pump 5 is connect with the bottom of tank body 1 to be cleaned, for the liquid in the tank body 1 to be cleaned is defeated
It send to the inclined plate settler 8.
The inclined plate settler 8 is connect with the water tank 11, and being used for will be after 8 settlement treatment of inclined plate settler
Liquid be delivered to the water tank 11.
Inclined plate settler 8 is that one kind carries out at sedimentation filtration liquid by inclined hexagonal tube (or hexagon tube sheet)
The component of reason can rapidly carry out carrying out sedimentation filtration processing to liquid, and effect of settling is good, and equipment volume is small.
Second water pump 12 is connect with the bottom of the water tank 11, and be set in the tank body to be cleaned 1
The cleaning sprayer 2 connects, and sprays for the liquid in the water tank 11 to be delivered to the cleaning sprayer 2, to described
Tank body 1 to be cleaned is cleaned.
During the work time, the dirty slurry fluid conveyed in the tank body 1 to be cleaned of the first water pump 5 is received from tank to be cleaned
It takes and is delivered to inclined plate settler 8.In inclined plate settler 8, the suspended impurity in mud can promptly be settled down to inclined plate settler 8
Bottom, more limpid liquid can stay in the upper layer of inclined plate settler 8.
The more limpid liquid in 8 upper layer of inclined plate settler can be transported to storage by way of spilling or mechanical extraction naturally
It is stand-by in water pot 11, the cleaning being then delivered to the Liquid extracting in water tank 11 by the second water pump 12 in tank body 1 to be cleaned
Spray head 2 is recycled.
Optionally, referring to figure 3., in the present embodiment, also connect between first water pump 5 and the tank body to be cleaned 1
It is connected to filter 4.
The filter 4 is used to be filtered the dirty liquid extracted out from the tank body 1 to be cleaned by strainer.It is logical
Primary filtration can be carried out to biggish impurity (such as gravel, bolt) by crossing the filter 4, prevent biggish impurity to first
Water pump 5 damages.
Optionally, in the present embodiment, the filter 4 is provided with dismountable strainer.It, can be with according to the needs at scene
The strainer for choosing different regular apertures, to adapt to the cleaning of evaporator operation of different operating conditions.
Optionally, referring once again to Fig. 3, in the present embodiment, the tank washing equipment can also include sedimentation agent addition dress
Set 6.
The sedimentation agent adding set 6 includes sedimentation agent delivery outlet, which is connected to first water pump 5
On liquid delivery path between the inclined plate settler 8, the sedimentation agent adding set 6 is used for heavy to the inclined plate is entered
Sedimentation agent is added in liquid before drop device 8.
Due to the sedimentation agent delivery outlet of the sedimentation agent adding set 6 be connected to first water pump 5 with it is described tiltedly
On liquid delivery path between plate settler 8, liquid is in the mistake for being delivered to the inclined plate settler 8 from first water pump 5
It is adequately mixed with the sedimentation agent in journey, the suspension after reaching the inclined plate settler 8, in general 3 seconds in liquid
Object can be settled down to 8 bottom of inclined plate settler, to realize the rapid subsidence filtration treatment of cleaning of evaporator circulating liquid.
Optionally, in the present embodiment, the inclined plate settler 8 includes tube settler pond and diaphragm pump 9.
The liquid outlet of first water pump 5 is set to the top in the tube settler pond, and the diaphragm pump 9 is connected to
The tube settler is discharged in the bottom in the tube settler pond, the sediment for that will be settled down to the tube settler bottom of pond portion
Pond.
In this way, the diaphragm pump 9 can prevent sediment routinely or regularly by tube settler bottom of pond portion sediment
Aggregation is accumulated in tube settler pond, makes inclined plate settler 8 can be with prolonged use.
Optionally, in the present embodiment, the tube settler bottom of pond portion is also provided with auger conveyor, the spiral
Conveyer for the sediment of the tube settler bottom of pond portion different location to be delivered near the diaphragm pump 9, make it is described every
Membrane pump 9 extracts sediment out.
Optionally, referring to figure 4., in the present embodiment, the tank washing equipment further includes liquid level sensor 13 and and water pump
Control unit 14.
The liquid level sensor 13 is set in the water tank 11, is deposited for detecting the liquid in the water tank 11
Amount.The water pump control unit 14 is electrically connected with the liquid level sensor 13, and respectively with first water pump 5 and the second water pump
12 electrical connections, the liquid stock for being detected according to the liquid level sensor 13 control first water pump 5 and the second water pump
12 working condition.
In the course of work, the water pump control unit 14 can detect the water storage by the liquid level sensor 13
When the liquid stock of tank 11 is larger, the amount of fluid drawn of first water pump 5 is reduced, so as to avoid the water tank 11 from overflowing
Out.
The water pump control unit 14 can detect that 11 liquid of water tank is deposited by the liquid level sensor 13
When measuring smaller, stop the work of second water pump 12, it is caused impaired so as to avoid second water pump 12 from dallying.
In this way, realizing pump working by the cooperation of the liquid level sensor 13 and the water pump control unit 14
Automation control is not necessarily to manual intervention, will reduce because of artificial erroneous judgement bring risk, has saved human cost.
Optionally, in the present embodiment, the liquid level sensor 13 is ultrasonic level gage, and the ultrasonic level gage is set
It is placed in the top of the water tank 11.
Optionally, in the present embodiment, first water pump 5 is peristaltic pump.Software pump is a kind of by way of wriggling
The pump of substance conveying is carried out, there is good suction capacity, the installation environment of live complexity can be coped with, and to more
The Liquid extracting effect of suspended substance is preferable.
Optionally, in the present embodiment, second water pump 12 is high pressure vertical water pump, and occupied area is small, Ke Yiti
For biggish cleaning hydraulic pressure.
The present embodiment also provides a kind of cleaning of evaporator system, including tank washing equipment and pedestal described in the present embodiment.Based on this implementation
The design for the tank washing equipment that example provides, all parts of the tank washing equipment in addition to the cleaning sprayer 2 use skid
Formula structure setting is on same pedestal, and equipment is concentrated, and occupied area is small, and the lifting setting of convenient transportation, can be with scene
Environment is neatly placed.
In conclusion tank washing equipment provided by the present application and system, pass through the first water pump, inclined plate settler, water tank,
The cooperation of two water pumps and cleaning sprayer carries out rapid subsidence filtering to the cycling use of water during cleaning of evaporator.So can using compared with
The component devices of small size carry out great purge amount or quick washing and cleaning operation, and sedimentation and filtering effect is good, the cleaning matter of raising
Amount and conveying equipment service life.
In addition, each functional module in each embodiment of the application can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above, the only various embodiments of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.
Claims (10)
1. a kind of tank washing equipment characterized by comprising the first water pump, inclined plate settler, water tank, the second water pump and cleaning
Spray head；
First water pump is connect with the bottom of tank body to be cleaned, described for the liquid in the tank body to be cleaned to be delivered to
Inclined plate settler；
The inclined plate settler is connect with the water tank, for will be defeated by the liquid after the inclined plate settler settlement treatment
It send to the water tank；
Second water pump is connect with the bottom of the water tank, and is sprayed with the cleaning being set in the tank body to be cleaned
Head connection is sprayed for the liquid in the water tank to be delivered to the cleaning sprayer, to carry out to the tank body to be cleaned
Cleaning.
2. tank washing equipment according to claim 1, which is characterized in that between first water pump and the tank body to be cleaned
It is also connected with filter, and the filter is used to the dirty liquid extracted out from the tank body to be cleaned was carried out by strainer
Filter.
3. tank washing equipment according to claim 2, which is characterized in that the filter is provided with dismountable strainer.
4. tank washing equipment according to claim 1, which is characterized in that the tank washing equipment further includes sedimentation agent addition dress
Set, the sedimentation agent adding set includes sedimentation agent delivery outlet, the sedimentation agent delivery outlet be connected to first water pump with it is described
On liquid delivery path between inclined plate settler, the sedimentation agent adding set is used for before the entrance inclined plate settler
Liquid in add sedimentation agent.
5. tank washing equipment according to claim 1, which is characterized in that the inclined plate settler include tube settler pond and every
Membrane pump；
The liquid outlet of first water pump is set to the top in the tube settler pond；
The diaphragm pump is connected to the bottom in the tube settler pond, for that will be settled down to the sedimentation of the tube settler bottom of pond portion
The tube settler pond is discharged in object.
6. tank washing equipment according to claim 1, which is characterized in that the tank washing equipment further include liquid level sensor and with
Water pump control unit；
The liquid level sensor is set in the water tank, for detecting the liquid stock in the water tank；
The water pump control unit is electrically connected with the liquid level sensor, and is electrically connected respectively with first water pump and the second water pump
It connects, the liquid stock for being detected according to the liquid level sensor controls the work shape of first water pump and the second water pump
State.
7. tank washing equipment according to claim 6, which is characterized in that the liquid level sensor is ultrasonic level gage, institute
State the top that ultrasonic level gage is set to the water tank.
8. tank washing equipment according to claim 1, which is characterized in that first water pump is peristaltic pump.
9. tank washing equipment according to claim 1, which is characterized in that second water pump is high pressure vertical water pump.
10. a kind of cleaning of evaporator system, which is characterized in that described including tank washing equipment and pedestal described in claim 1-9 any one
All parts of the tank washing equipment in addition to the cleaning sprayer are using skid-mounted type structure setting on same pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910686827.5A CN110394340A (en) | 2019-07-29 | 2019-07-29 | Tank washing equipment and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910686827.5A CN110394340A (en) | 2019-07-29 | 2019-07-29 | Tank washing equipment and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110394340A true CN110394340A (en) | 2019-11-01 |
Family
ID=68326276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910686827.5A Pending CN110394340A (en) | 2019-07-29 | 2019-07-29 | Tank washing equipment and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110394340A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002090482A1 (en) * | 2001-04-23 | 2002-11-14 | Obschestvo S Ogranichennoi Otvetstvennostju 'chistye Tekhnologii' | Method of hydrocarbon impurities removal from surfaces |
| CN207026051U (en) * | 2017-08-04 | 2018-02-23 | 宁波海越新材料有限公司 | Oil product storage tank purging system |
| CN208098450U (en) * | 2018-02-28 | 2018-11-16 | 成都兴信机电设备有限公司 | A kind of self-cleaning solvent slop recovery system |
| CN208814763U (en) * | 2018-06-13 | 2019-05-03 | 陕西雷光环保科技有限公司 | A kind of high concentration oily wastewater pretreatment unit |
| CN109731868A (en) * | 2019-01-10 | 2019-05-10 | 中国海洋石油集团有限公司 | A kind of tank cleaning system and cleaning method |
-
2019
- 2019-07-29 CN CN201910686827.5A patent/CN110394340A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002090482A1 (en) * | 2001-04-23 | 2002-11-14 | Obschestvo S Ogranichennoi Otvetstvennostju 'chistye Tekhnologii' | Method of hydrocarbon impurities removal from surfaces |
| CN207026051U (en) * | 2017-08-04 | 2018-02-23 | 宁波海越新材料有限公司 | Oil product storage tank purging system |
| CN208098450U (en) * | 2018-02-28 | 2018-11-16 | 成都兴信机电设备有限公司 | A kind of self-cleaning solvent slop recovery system |
| CN208814763U (en) * | 2018-06-13 | 2019-05-03 | 陕西雷光环保科技有限公司 | A kind of high concentration oily wastewater pretreatment unit |
| CN109731868A (en) * | 2019-01-10 | 2019-05-10 | 中国海洋石油集团有限公司 | A kind of tank cleaning system and cleaning method |
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Application publication date: 20191101 |