CN207918489U - Marine oil-water separator and water-oil separating peculiar to vessel and burning linked system - Google Patents
Marine oil-water separator and water-oil separating peculiar to vessel and burning linked system Download PDFInfo
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- CN207918489U CN207918489U CN201820155882.2U CN201820155882U CN207918489U CN 207918489 U CN207918489 U CN 207918489U CN 201820155882 U CN201820155882 U CN 201820155882U CN 207918489 U CN207918489 U CN 207918489U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 159
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000000779 smoke Substances 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 abstract description 12
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 239000010865 sewage Substances 0.000 description 14
- 239000000446 fuel Substances 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 206010021036 Hyponatraemia Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Abstract
The utility model discloses a kind of marine oil-water separator and water-oil separating peculiar to vessel and burning linked systems, the oil water separator includes controller, starting switch, breaker, frequency converter, water supply pump and oil content concentration sensor, the main contacts of breaker and the input terminal of frequency converter connect, the output end of frequency converter is connect with water supply pump, and controller is connect with starting switch, frequency converter, oil content concentration sensor respectively；The linked system includes incinerator, hot well and oil water separator, the oil outlet of oil water separator is connected by the oil inlet of sump oil pipeline and incinerator, the steam (vapor) outlet of oil water separator is connect by the first steam pipework with hot well, heating coil is installed at the smoke evacuation of incinerator, the water inlet of heating coil is connect by water pump with hot well, and the steam (vapor) outlet of heating coil is connected by the steam inlet of the second steam pipework and oil water separator.The utility model can improve the separating effect and efficiency of marine oil-water separator, improve the environmental protection and economy of ship.
Description
Technical field
The utility model is related to a kind of marine oil-water separator and water-oil separating peculiar to vessel and burning linked systems, belong to peculiar to vessel
Oily water separation technique field.
Background technology
With the development of the global economy, Shipping car loading accounts for 85% or more global trade total amount, the ship of getting worse
Pollution problem is paid high attention to by everybody.The Bilge water that one ship is discharged every year accounts for about the gross tonnage 10% of the ship, the bilge
Water oil content may be up to 50000mg/L, and the oil mass for being discharged into sea every year is about 1,470,000 t, and wherein bilge-water oil content is 300,000 t.Often
Ton is discharged into shop sump oil water in ocean, can form 5X106m2Oil film pollution.The main harm of oil film has：It obstructs in air
Oxygen is transmitted into water, and aquatic organism is dead due to anoxic, and oil film is also rich in toxicity, or even causes fire.
National Maritime, which is organized as protecting the marine environment, forces ship configuration marine oil-water separator.Typical bunker oil peculiar to vessel
Separator has ship oasis machine in the SAREX types marine oil-water separator of U.S.'s coffin water process equipment company, Nanjing of China
The Bo Long Fox industrial group TURBULO bilge bunker oil of CYSC the series marine oil-water separator and Germany peculiar to vessel of Co., Ltd
Separator etc..Since the development of marine oil-water separator monitoring technology is not perfect and maintenance management trouble, many ships are the bilge
Water does not handle by marine oil-water separator peculiar to vessel and is directly discharged to ocean, causes marine pollution, and science solves this
The approach of problem is to improve the separating property of marine oil-water separator, enables marine oil-water separator peculiar to vessel in marine environmental protection
In play more positive effect.
The use situation of marine oil-water separator is analyzed as follows：
Cabin bilge-water, ballast water for ship and ship tank washings are the main sources of shop sump oil water.Cabin bilge-water contains
Highest oil cut rate is up to 0.5%, and ballast water oil content is up to 0.3%-0.6%, and tank washings oil content reaches 1500ppm.Ship peculiar to vessel
It is the important equipment that ship handles sump oil water with oil water separator.
Three kinds of states are presented in the oil of sump oil water：Dissipate oil, it is floating oil, oil emulsion.Dispersed oil and it is floating oil it is more easily separated.Emulsification
Oil is milkiness shape in sewage, and oil emulsion particle diameter is difficult to merge generally between 0.1-10 μm, and between particle, Er Qiechang
Phase keeps stablizing, it is difficult to detach.Sump oil water separating method has the methods of physics, electrolysis, chemistry.Marine oil-water separator often uses object
Reason method is to carry out water-oil separating using physical methods such as the density contrast of grease or filtering absorption.Traditional water-oil separating peculiar to vessel
Device is that International Maritime Organization divides into family planning production in 1992 by MEPC.60 (33) resolutions.International Maritime Organization passes through within 2004
MEPC107. (49) instead of MEPC.60 (33), which overcomes emulsification grease and endangered caused by ocean, while to peculiar to vessel
Oil water separator also proposed challenge and new demand, and current marine oil-water separator plays preferably marine environmental protection
Effect, but there is still a need for improve for the separating property of marine oil-water separator.
Utility model content
Purpose of the utility model is to solve the defects of the above-mentioned prior art, provide a kind of water-oil separating peculiar to vessel
Device, the marine oil-water separator not only will not overload operation, but also can keep simultaneously a higher separating effect and separation imitate
Rate.
The another object of the utility model is to provide a kind of water-oil separating peculiar to vessel and burns linked system, and the system is significantly
It alleviates the live load of marine oil-water separator and improves the service life of marine oil-water separator, marine incinerator burning
The sump oil separated using marine oil-water separator when solid improves the environmental protection and economy of ship.
The purpose of this utility model can be reached by adopting the following technical scheme that：
A kind of marine oil-water separator, including controller, starting switch, breaker, frequency converter, water supply pump and oil content concentration
Sensor, the main contacts of the breaker and the input terminal of frequency converter connect, and the output end of the frequency converter is connect with water supply pump,
The controller is connect with starting switch, frequency converter, oil content concentration sensor respectively.
Further, the frequency converter uses MM440 frequency converters, the third pin of the frequency converter, the 4th pin, the 5th to draw
Foot, the 6th pin, the tenth pin, the 11st pin are connect with controller.
Further, the controller uses programmable logic controller (PLC).
Further, the starting switch uses button switch.
Further, the breaker uses three-phase breaker, the output end of the frequency converter and the three-phase electricity of water supply pump
Source connects.
The another object of the utility model can be reached by adopting the following technical scheme that：
A kind of water-oil separating peculiar to vessel with burn linked system, including incinerator, hot well and above-mentioned oil water separator,
The oil outlet of the oil water separator is connected by the oil inlet of sump oil pipeline and incinerator, and the steam (vapor) outlet of oil water separator is logical
It crosses the first steam pipework to connect with hot well, heating coil, the water inlet of the heating coil is installed at the smoke evacuation of incinerator
It is connect with hot well by water pump, the steam inlet that the steam (vapor) outlet of heating coil passes through the second steam pipework and oil water separator
Connection.
Further, first steam pipework is equipped with the first valve.
Further, second steam pipework is equipped with the second valve and third valve, and second valve is close to heating coil
Steam (vapor) outlet, steam inlet of the third valve close to oil water separator.
Further, third steam pipework is accessed on second steam pipework.
Further, the third steam pipework is equipped with the 4th valve.
The utility model has following advantageous effect compared with the existing technology：
1, the marine oil-water separator of the utility model is provided with frequency converter, first closes the switch of breaker, makes breaker
Main contacts be closed, then press starting switch, controller gives frequency converter one enabling signal, and water supply pump brings into operation, will point
Separate out come water concentration of oil signal as input signal, the concentration of oil with setting as standard signal, and by ratio,
Integral, differentiation element, which calculate, adjusts output frequency, adjusts the rotating speed of water supply pump, reaches most with separating capacity to adjust water supply
Good cooperation makes marine oil-water separator neither overload operation, while keeping a higher separating effect and separative efficiency.
2, the water-oil separating peculiar to vessel of the utility model with burn linked system by marine oil-water separator and marine incinerator
Work link, by marine incinerator smoke evacuation install heating coil heat water generate steam, steam be used for heat
Sewage oil mixture in marine oil-water separator further increases the separation of marine oil-water separator to accelerate water-oil separating
Effect, while the sump oil that sewage peculiar to vessel is separated can be subtracted as the fuel of marine incinerator with other substances of incinerating solid
The use of diesel oil when few marine incinerator work；In addition, some sump oil waters can not have to marine oil-water separator operation separation, and it is straight
The waste oil that the part of fuel picked marine incinerator to be burned, and burned is separated from marine oil-water separator, greatly
It is big to alleviate the live load of marine oil-water separator and improve the service life of marine oil-water separator, marine incinerator combustion
The sump oil separated using marine oil-water separator when solid is burnt, the environmental protection and economy of ship is improved.
3, the water-oil separating peculiar to vessel of the utility model is also provided with another steam pipework with linked system is burned, by this
The steam of other vapour sources is conveyed to marine oil-water separator by steam pipework, can be with when the steam of marine incinerator lacks
The steam for supplementing marine oil-water separator, ensures the separating effect of marine oil-water separator.
Description of the drawings
Fig. 1 is the structure diagram of the marine oil-water separator of the utility model embodiment 1.
Fig. 2 shows for the connection of water supply pump, breaker and frequency converter in the marine oil-water separator of the utility model embodiment 1
It is intended to.
Fig. 3 is the water-oil separating peculiar to vessel and burning linked system structure chart of the utility model embodiment 2.
Wherein, 1- controllers, 2- starting switches, 3- breakers, 4- frequency converters, 5- water supply pumps, 6- oil content concentration sensors,
7- oil water separators, 8- incinerators, 9- hot wells, 10- sump oil pipelines, the first steam pipeworks of 11-, 12- heating coils, 13- water
Pump, the second steam pipeworks of 14-, the first valves of 15-, the second valves of 16-, 17- third valves, 18- third steam pipeworks, the 4th valves of 19-.
Specific implementation mode
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment 1：
The water supply pump of marine oil-water separator, generally with the constant sewage pump of sewerage on ship, the water supply of sewage pump
More than the treating capacity of marine oil-water separator, through side bypass flow back to sewage into, due to repeating to be sucked by sewage pump, serious breast
Change, it is difficult to increase separation；Currently, many marine oil-water separators on the market carry sewage pump, but sewage pump is also constant pump,
It is unable to variable supply sewage quantity for the water supply pump of constant pump, initial stage water supply is inadequate, influences to detach benefit；Later stage for dilutional hyponatremia,
Water-oil separating performance is reduced, constant pump cannot change the water supply of water supply pump according to separating effect, make marine oil-water separator point
Reach best from performance.
As shown in Figure 1, present embodiments providing a kind of marine oil-water separator, which includes controller
1, starting switch 2, breaker 3, frequency converter 4, water supply pump 5 and oil content concentration sensor 6, main contacts and the frequency converter 4 of breaker 3
Input terminal connection, the output end of frequency converter 4 connect with water supply pump 5, controller 1 respectively with starting switch 2, frequency converter 4, oil content
Concentration sensor 6 connects；Wherein, controller 1 uses PLC (Programmable Logic Controller, programmable logic
Controller), starting switch 2 uses button switch, and breaker 3 uses three-phase breaker, the output end of frequency converter 4 specifically with water supply
The three phase mains connection of pump 5.
As depicted in figs. 1 and 2, in the present embodiment, frequency converter 4 uses MM440 frequency converters, the third of the frequency converter 4 to draw
Foot (3 terminal), the 4th pin (4 terminal), the 5th pin (5 terminal), the 6th pin (6 terminal), the tenth pin (10 terminal),
11 pins (11 terminal) are connect with controller 1, and the 28th pin (28 terminal) ground connection, wherein third pin and the 4th draws
Foot receives the oil content concentration signal of controller 1, and the 5th pin receives the enabling signal of controller 1, and the 6th pin receives controller 1
Stop signal, the tenth pin and the 11st pin receive the setting oil content concentration signal of controller 1.
As depicted in figs. 1 and 2, the marine oil-water separator operation principle of the present embodiment is as follows：
The switch for first closing breaker 3 makes the main contacts of breaker 3 be closed, then presses starting switch 2, and controller 1 is given
4 one enabling signals of frequency converter, water supply pump 5 bring into operation, using the concentration of oil signal for the water separated as input signal,
Concentration of oil 15ppm with setting is calculated by ratio, integral, differential (PID) link as standard signal and is adjusted output frequency
Rate adjusts the rotating speed of water supply pump, reaches best fit with separating capacity to adjust water supply, makes marine oil-water separator neither
Overload operation, while keeping a higher separating effect and separative efficiency.
Embodiment 2：
As shown in figure 3, present embodiments providing a kind of water-oil separating peculiar to vessel and burning linked system, which includes grease
Separator 7, incinerator 8 and hot well 9, oil water separator 7 are the oil water separator of above-described embodiment 1, and oil water separator 7 goes out
Hydraulic fluid port is connect by sump oil pipeline 10 with the oil inlet of incinerator 8, and the sump oil that oil water separator 7 is isolated is as incinerator 8
Fuel, the steam (vapor) outlet of oil water separator 7 connect with hot well 9 by the first steam pipework 11, oil water separator 7 detached
The water gone out is conveyed to hot well 9, and heating coil 12 is equipped at the smoke evacuation of incinerator 8, and the water inlet of heating coil 12 passes through water
Pump 13 is connect with hot well 9, the steam (vapor) outlet of heating coil 12 by the steam of the second steam pipework 14 and oil water separator 7 into
Mouthful connection, the water that the heating coil of incinerator 8 can extract water pump 13 out heat, and to generate steam, steam passes through the
Two steam pipeworks 14 are conveyed to oil water separator 7, the sewage oil mixture of oil water separator 7 are heated, to accelerate water-oil separating.
In the present embodiment, the first steam pipework 11 is equipped with the first valve 15, after the first valve 15 is opened, oil water separator 7
Water is conveyed to hot well 9 by the first steam pipework 11, after the first valve 15 is closed, oil water separator 7 stops conveying；Second steams
Vapor pipeline 14 is equipped with the second valve 16 and third valve 17, wherein steam (vapor) outlet of second valve 16 close to heating coil 12, third valve
17 close to oil water separator 7 steam inlet, after the second valve 16 and third valve 17 are opened simultaneously, incinerator 8 passes through the second steam
Steam is conveyed to separator 7 by pipeline 14, and after the second valve 16 and third valve 17 simultaneously close off, incinerator 8 stops conveying.
Further, third steam pipework 18 is accessed on the second steam pipework 14, third steam pipework 18 can be by other
Vapour source is conveyed to oil water separator 7, it is preferable that third steam pipework 18 is equipped with the 4th valve 19, and the second valve 16 is closed, third
After valve 17 and the 4th valve 19 are opened, the steam of other vapour sources is conveyed to oil water separator 7 by third steam pipework 18；4th valve
19 close, and after the second valve 16 and the unlatching of third valve 1, steam is conveyed to water-oil separating by incinerator 8 by the second steam pipework 14
Device 7；After second valve 16, third valve 17 and the 4th valve 19 are switched on, steam is conveyed oil supply by incinerator 8 and other vapour sources simultaneously
Separator 7；After second valve 16, third valve 17 and the 4th valve 19 are all closed, incinerator 8 and other vapour sources all stop conveying.
The water-oil separating peculiar to vessel of the present embodiment and burning linked system operation principle are as follows：
Oil water separator 7 heats obtained steam and is conveyed to hot well 9 by the first steam pipework 11, will by water pump 13
The water of hot well 9 is extracted out, and incinerator 8 is then fed to；Water is added by the heating coil 12 installed at 8 smoke evacuation of incinerator
Heat generates steam, and steam is conveyed to oil water separator 7 by the second steam pipework 14, for heating the sewage of oil water separator 7
Oil mixture further increases the separating effect of oil water separator 7 to accelerate water-oil separating；Meanwhile oil water separator 7 detaches
The sump oil gone out is conveyed to incinerator 8 by sump oil pipeline 10, is reduced with other substances of incinerating solid as the fuel of incinerator 8
The use of diesel oil when incinerator 8 works.The work of oil water separator 7 and incinerator 8 is linked, some sump oil waters can not have to
The operation separation of oil water separator 7, and the part of fuel for being directly sent to incinerator 8 and being burned, and burn comes from oil water separator 7
The sump oil separated significantly reduces the live load of oil water separator 7 and improves the service life of oil water separator 7, burns
The sump oil separated using oil water separator 7 when 8 burning solid of stove is burnt, the environmental protection and economy of ship is improved.
Reach with separating capacity and most preferably match in conclusion the marine oil-water separator of the utility model can adjust water supply
It closes, makes marine oil-water separator neither overload operation, while keeping a higher separating effect and separative efficiency；This practicality
Novel water-oil separating peculiar to vessel links the work of marine oil-water separator and marine incinerator with linked system is burned, and leads to
It crosses the heating coil heating water installed at marine incinerator smoke evacuation and generates steam, steam is used for heating in marine oil-water separator
Sewage oil mixture further increases the separating effect of marine oil-water separator, while sewage peculiar to vessel point to accelerate water-oil separating
Separating out the sump oil come can be as the fuel of marine incinerator, with other substances of incinerating solid, when reducing marine incinerator work
The use of diesel oil；In addition, some sump oil waters can not have to marine oil-water separator operation separation, and be directly sent to marine incinerator into
Row burns, and the waste oil that the part of fuel burned is separated from marine oil-water separator, significantly reduces bunker oil moisture
Live load from device and the service life for improving marine oil-water separator, when marine incinerator burning solid utilize bunker oil
The sump oil that separator is separated improves the environmental protection and economy of ship.
The above, only the utility model preferred embodiment, but the scope of protection of the utility model is not limited to
This, any one skilled in the art is in range disclosed in the utility model, skill according to the present utility model
Art scheme and its utility model design are subject to equivalent substitution or change, belong to the scope of protection of the utility model.
Claims (10)
1. a kind of marine oil-water separator, it is characterised in that：Including controller, starting switch, breaker, frequency converter, water supply pump
With oil content concentration sensor, the input terminal of the main contacts of the breaker and frequency converter connects, the output end of the frequency converter with
Water supply pump connects, and the controller is connect with starting switch, frequency converter, oil content concentration sensor respectively.
2. a kind of marine oil-water separator according to claim 1, it is characterised in that：The frequency converter is become using MM440
Frequency device, the third pin of the frequency converter, the 4th pin, the 5th pin, the 6th pin, the tenth pin, the 11st pin with control
Device connection processed.
3. a kind of marine oil-water separator according to claim 1, it is characterised in that：The controller is patrolled using programmable
Collect controller.
4. a kind of marine oil-water separator according to claim 1, it is characterised in that：The starting switch is opened using button
It closes.
5. a kind of marine oil-water separator according to claim 1, it is characterised in that：The breaker uses three-phase break
Device, the output end of the frequency converter and the three phase mains of water supply pump connect.
6. a kind of water-oil separating peculiar to vessel and burning linked system, it is characterised in that：Including incinerator, hot well and claim
1-5 any one of them oil water separators, the oil inlet that the oil outlet of the oil water separator passes through sump oil pipeline and incinerator
Connection, the steam (vapor) outlet of oil water separator are connect by the first steam pipework with hot well, are equipped with and are added at the smoke evacuation of incinerator
The water inlet of hot coil, the heating coil is connect by water pump with hot well, and the steam (vapor) outlet of heating coil is steamed by second
The steam inlet of vapor pipeline and oil water separator connects.
7. a kind of water-oil separating peculiar to vessel according to claim 6 and burning linked system, it is characterised in that：Described first steams
Vapor pipeline is equipped with the first valve.
8. a kind of water-oil separating peculiar to vessel according to claim 6 and burning linked system, it is characterised in that：Described second steams
Vapor pipeline is equipped with the second valve and third valve, and second valve is close to the steam (vapor) outlet of heating coil, and the third valve is close to oil
The steam inlet of separator.
9. a kind of water-oil separating peculiar to vessel according to claim 6 and burning linked system, it is characterised in that：Described second steams
Third steam pipework is accessed on vapor pipeline.
10. a kind of water-oil separating peculiar to vessel according to claim 9 and burning linked system, it is characterised in that：The third
Steam pipework is equipped with the 4th valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820155882.2U CN207918489U (en) | 2018-01-30 | 2018-01-30 | Marine oil-water separator and water-oil separating peculiar to vessel and burning linked system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820155882.2U CN207918489U (en) | 2018-01-30 | 2018-01-30 | Marine oil-water separator and water-oil separating peculiar to vessel and burning linked system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207918489U true CN207918489U (en) | 2018-09-28 |
Family
ID=63606051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820155882.2U Expired - Fee Related CN207918489U (en) | 2018-01-30 | 2018-01-30 | Marine oil-water separator and water-oil separating peculiar to vessel and burning linked system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207918489U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231687A (en) * | 2018-10-19 | 2019-01-18 | 中船澄西船舶修造有限公司 | A kind of sewage disposal system peculiar to vessel |
-
2018
- 2018-01-30 CN CN201820155882.2U patent/CN207918489U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231687A (en) * | 2018-10-19 | 2019-01-18 | 中船澄西船舶修造有限公司 | A kind of sewage disposal system peculiar to vessel |
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| CF01 | Termination of patent right due to non-payment of annual fee |