CN113072113A - Dirty oil water recovery device and recovery method thereof - Google Patents
Dirty oil water recovery device and recovery method thereof Download PDFInfo
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- CN113072113A CN113072113A CN202110478132.5A CN202110478132A CN113072113A CN 113072113 A CN113072113 A CN 113072113A CN 202110478132 A CN202110478132 A CN 202110478132A CN 113072113 A CN113072113 A CN 113072113A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
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- Water Supply & Treatment (AREA)
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Abstract
本发明公开了一种污油水回收装置及其回收方法，包括第一三通球阀、吸入粗水滤器、污油水泵组、第二三通球阀、快接短管、耐油橡胶软管、注入管和污油水收集柜；吸入粗水滤器的进口以及污油水收集柜的出口分别与第一三通球阀的两端口相连，且第一三通球阀的第三端口通过回收软管与污油水舱的吸口相连；吸入粗水滤器的出口与污油水泵组的进口相连，且污油水泵组的出口与第二三通球阀的一端口相连，第二三通球阀的另一端口依次通过快接短管、耐油橡胶软管、注入管与污油水收集柜的进口相连，且其第三端口通过回收软管与指定污油水存放点相连。本发明结构简单，使用方便，提高了排放过程的安全性，减少了排放过程中对环境二次污染的可能性。
The invention discloses a sewage oil water recovery device and a recovery method thereof, comprising a first three-way ball valve, a suction coarse water filter, a sewage oil water pump group, a second three-way ball valve, a quick-connect short pipe, an oil-resistant rubber hose, and an injection pipe The inlet of the suction coarse water filter and the outlet of the dirty oil and water collection tank are respectively connected with the two ports of the first three-way ball valve, and the third port of the first three-way ball valve is connected to the sewage tank through the recovery hose. The suction port is connected; the outlet of the suction coarse water filter is connected with the inlet of the sewage oil pump group, and the outlet of the sewage oil water pump group is connected with one port of the second three-way ball valve, and the other port of the second three-way ball valve is shorted by quick connection in turn The pipe, the oil-resistant rubber hose, and the injection pipe are connected to the inlet of the dirty oil and water collection cabinet, and the third port is connected to the designated dirty oil and water storage point through the recovery hose. The invention has simple structure and convenient use, improves the safety of the discharge process, and reduces the possibility of secondary pollution to the environment during the discharge process.
Description
Technical Field
The invention relates to the field of environmental protection, in particular to a dirty oil water recovery device and a recovery method thereof.
Background
The method comprises the following steps that when a ship stops at a wharf, dirty oil water stored in a bilge water tank needs to be discharged, and at present, the dirty oil water is generally discharged in a way of opposite shore through an international shore connection hose arranged on a ship body and is discharged to a fixed collection point; however, the length of the hose to be provided is not fixed, and the hose and the international shore connection joint are generally connected by adopting a quick connector, so that the hose is easy to be disengaged, dirty oil is discharged into water, and irreversible pollution is caused to the environment. Therefore, the above problems need to be solved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a dirty oil water recovery device and a recovery method thereof, which have the advantages of simple structure and convenient use, improve the safety of the discharge process and reduce the possibility of secondary pollution to the environment in the discharge process.
In order to solve the technical problems, the invention adopts the following technical scheme: the invention relates to a dirty oil water recovery device, which has the innovation points that: the device comprises a first three-way ball valve, a coarse water suction filter, a sump oil water pump set, a second three-way ball valve, a quick-connection short pipe, an oil-resistant rubber hose, an injection pipe, a sump oil water collection cabinet and a plurality of pipelines; an inlet of the coarse water suction filter and an outlet of the sump oil water collecting cabinet are respectively connected with two ports of the first three-way ball valve through pipelines, and a third port of the first three-way ball valve is connected with a suction port of a sump oil water tank on a ship through a recovery hose to suck sump oil water; the outlet of the coarse water suction filter is connected with the inlet of the sump oil water pump set through a pipeline, the outlet of the sump oil water pump set is connected with one port of the second three-way ball valve through a pipeline, the other port of the second three-way ball valve is connected with the inlet of the sump oil water collection cabinet through a pipeline, a quick-connection short pipe, an oil-resistant rubber hose and an injection pipe in sequence, the third port of the second three-way ball valve is connected with a specified sump oil water storage point through a recovery hose, and sump oil water in the sump oil water collection cabinet is discharged and treated.
Preferably, the device further comprises a differential pressure sensor; and the two ends of the differential pressure sensor are respectively connected with the inlet and the outlet of the coarse water suction filter, the differential pressure of the differential pressure sensor is set to be 5bar, and the blockage condition of the coarse water suction filter is monitored.
Preferably, a butterfly valve is further arranged on one side, close to the coarse water suction filter, of a pipeline between the coarse water suction filter and the sump oil water pump set, and a butterfly check valve is further arranged on one side, close to the second three-way ball valve, of a pipeline between the sump oil water pump set and the second three-way ball valve.
Preferably, the system also comprises a first pressure sensor, a vacuum pressure gauge, a pressure gauge and a second pressure sensor; the first pressure sensor and the vacuum pressure gauge are respectively connected with an inlet of the sump oil water pump set, and the pressure gauge and the second pressure sensor are respectively connected with an outlet of the sump oil water pump set; the indication alarm of the first pressure sensor is set to be-1-0 bar, and the indication alarm of the second pressure sensor is set to be 0-10 bar.
Preferably, the system also comprises a double-rotor flow meter; and a double-rotor flowmeter is further arranged on a pipeline between the second three-way ball valve and the quick-connection short pipe, and the double-rotor flowmeter adopts a dirty oil water stainless steel double-rotor-electronic meter head flowmeter.
Preferably, the dirty oil water pump unit adopts a portable dirty oil centrifugal pump unit.
Preferably, a gooseneck vent pipe is arranged on one side of the upper end of the dirty oil water collecting cabinet and is communicated with the interior of the dirty oil water collecting cabinet in a sealing manner; a high liquid level floating ball alarm device is further arranged on one side of the outer portion of the dirty oil water collecting cabinet, and a flat glass liquid level meter is further vertically arranged on the other side of the outer portion of the dirty oil water collecting cabinet; a discharge valve is further arranged at the bottom end of the other side of the dirty oil water collecting cabinet, and the dirty oil water collecting cabinet is cleaned and discharged through the discharge valve; the upper end intermediate position of sump oil water collection cabinet still is equipped with the oil content detector, the sense terminal of oil content detector extends to the inside position under bias of sump oil water collection cabinet, and its suggestion warning sets up to 15 ppm.
Preferably, the system also comprises a PLC control panel; the PLC control panel is respectively electrically connected with the differential pressure sensor, the first pressure sensor, the sump oil water pump set, the second pressure sensor, the dual-rotor flowmeter, the high liquid level floating ball alarm device and the oil content detector, and is electrically connected with the 380V/50HZ external power supply.
The invention discloses a method for recovering dirty oil water, which is characterized by comprising the following steps:
the method comprises the following steps: firstly, hoisting the device to a ship, and connecting a third port of a first three-way ball valve with a suction port of a sump oil water tank on the ship through a recovery hose;
step two: opening a third port of the first three-way ball valve and a port connected with the coarse water suction filter, closing a port connected with the first three-way ball valve and the sump oil water collection cabinet, simultaneously opening a port connected with the second three-way ball valve and the butterfly check valve and the other port connected with the dual-rotor flowmeter, and closing a third port of the second three-way ball valve;
step three: then, pumping the dirty oil water in the dirty oil water tank on the ship to a dirty oil water collection cabinet through a dirty oil water pump set for recovery treatment;
step four: after the sump oil water is collected, the first three-way ball valve is disconnected from a sump oil water tank on the ship, then the device is hoisted to a specified sump oil water storage point, and a third port of the second three-way ball valve is connected with the specified sump oil water storage point through a recovery hose;
step five: opening a port connected with the first three-way ball valve and the sump oil water collecting cabinet and a port connected with the coarse water suction filter, closing a third port of the first three-way ball valve, simultaneously opening a port connected with the second three-way ball valve and the butterfly check valve and a third port of the second three-way ball valve, and closing the other port connected with the dual-rotor flowmeter;
step six: and then the dirty oil water in the dirty oil water collection cabinet is discharged to a specified dirty oil water storage point through a dirty oil water pump set.
The invention has the beneficial effects that: the invention has simple structure and convenient use, improves the safety of the discharge process and reduces the possibility of secondary pollution to the environment in the discharge process.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a waste oil water recovery apparatus according to the present invention.
Wherein, 1-sump oil water tank; 2-suction of coarse water filter; 3-a butterfly valve; 4-a differential pressure sensor; 5-a first pressure sensor; 6-vacuum pressure gauge; 7-a pressure gauge; 8-a second pressure sensor; 9-butterfly check valve; 10-a first three-way ball valve; 11-a dual rotor flow meter; 12-quick-connection short pipe; 13-oil resistant rubber hose; 14-an injection tube; 15-high liquid level float alarm device; 16-oil content detector; 17-a sheet glass level gauge; 18-sump oil water collection cabinet; 19-a PLC control panel; 20-a dump valve; 21-gooseneck vent pipe; 22-a sump oil water pump set; 23-second three-way ball valve.
Detailed Description
The technical solution of the present invention will be clearly and completely described by the following detailed description.
The invention relates to a sump oil water recovery device, which comprises a first three-way ball valve 10, a coarse water suction filter 2, a sump oil water pump set 22, a second three-way ball valve 23, a quick-connection short pipe 12, an oil-resistant rubber hose 13, an injection pipe 14, a sump oil water collection cabinet 18 and a plurality of pipelines; as shown in fig. 1, an inlet of the coarse water suction filter 2 and an outlet of the dirty oil water collecting cabinet 18 are respectively connected with two ports of a first three-way ball valve 10 through pipelines, and a third port of the first three-way ball valve 10 is connected with a suction port of a dirty oil water tank 1 on a ship through a recovery hose to suck dirty oil water; the outlet of the coarse water suction filter 2 is connected with the inlet of a sump oil water pump set 22 through a pipeline, the outlet of the sump oil water pump set 22 is connected with one port of a second three-way ball valve 23 through a pipeline, the other port of the second three-way ball valve 23 is connected with the inlet of a sump oil water collection cabinet 18 through a pipeline, a quick-connection short pipe 12, an oil-resistant rubber hose 13 and an injection pipe 14 in sequence, the third port of the sump oil water collection cabinet is connected with a specified sump oil water storage point through a recovery hose, and sump oil water in the sump oil water collection cabinet 18 is discharged and treated. Wherein, the dirty oil water pump unit 22 adopts a portable dirty oil centrifugal pump unit.
As shown in fig. 1, two ends of a differential pressure sensor 4 are respectively connected with an inlet and an outlet of the suction coarse water filter 2, the differential pressure of the differential pressure sensor 4 is set to be 5bar, and the blockage condition of the suction coarse water filter 2 is monitored; if the differential pressure of the differential pressure sensor 4 exceeds 5bar, the blockage situation of the suction coarse water filter 2 is indicated.
As shown in fig. 1, a butterfly valve 3 is further provided on the side of the pipe between the suction coarse water filter 2 and the dirty water pump group 22 close to the suction coarse water filter 2, and a butterfly check valve 9 is further provided on the side of the pipe between the dirty water pump group 22 and the second three-way ball valve 23 close to the second three-way ball valve 23.
As shown in fig. 1, a first pressure sensor 5 and a vacuum pressure gauge 6 are respectively connected with an inlet of a sump oil water pump set 22, and a pressure gauge 7 and a second pressure sensor 8 are respectively connected with an outlet of the sump oil water pump set 22; the indication alarm of the first pressure sensor 5 is set to be-1-0 bar, the indication alarm of the second pressure sensor 8 is set to be 0-10 bar, when the working pressure is lower than the set pressure, the situation that a pump motor of the dirty oil water pump set 22 is over-pressurized or leaked is indicated, the device needs to be stopped immediately, and the device can be restarted after the overhaul is finished and the fact that the device has no problem is confirmed.
In the invention, a double-rotor flowmeter 11 is also arranged on a pipeline between the second three-way ball valve 23 and the quick-connection short pipe 12, and as shown in figure 1, the double-rotor flowmeter 11 adopts a sewage water stainless steel double-rotor-electronic meter head flowmeter.
One side of the upper end of the dirty oil water collecting cabinet 18 is provided with a gooseneck vent pipe 21, and the gooseneck vent pipe 21 is communicated with the interior of the dirty oil water collecting cabinet 18 in a sealing manner; as shown in fig. 1, a high liquid level float ball alarm device 15 is arranged on one side of the outside of the dirty oil water collecting cabinet 18, and a flat glass liquid level meter 17 is vertically arranged on the other side of the outside of the dirty oil water collecting cabinet; a discharge valve 20 is arranged at the bottom end of the other side of the dirty oil water collection cabinet 18, and residues in the dirty oil water collection cabinet 18 are cleaned and discharged through the discharge valve 20; an oil content detector 16 is further arranged in the middle of the upper end of the dirty oil water collecting cabinet 18, the detection end of the oil content detector 16 extends to the lower position inside the dirty oil water collecting cabinet 18, and the prompting alarm is set to be 15 ppm; when the oil content detector 16 detects that the oil content exceeds 15ppm, the device needs to be stopped immediately, and the oil-water separator for the ship is adopted for treatment and then pumping operation is carried out again.
As shown in fig. 1, the PLC control panel 19 is respectively connected with the differential pressure sensor 4, the first pressure sensor 5, the sump oil water pump set 22, the second pressure sensor 8, the dual-rotor flowmeter 11, the high liquid level float ball alarm device 15 and the oil content detector 16, and is electrically connected with the 380V/50HZ external power supply, so that the oil content detection data and the sewage discharge amount are fed back to the PLC control panel 19, the secondary pollution to the environment is avoided to a great extent, and the requirement on the environment protection of the Yangtze river basin can be met.
The invention relates to a dirty oil water recovery method, which comprises the following steps:
the method comprises the following steps: firstly, the device is hoisted to a ship, and the third port of the first three-way ball valve 10 is connected with a suction port of a sump oil water tank 1 on the ship through a recovery hose.
Step two: and opening a third port of the first three-way ball valve 10 and a port connected with the coarse water suction filter 2, closing a port connected with the first three-way ball valve 10 and the dirty water and oil collecting cabinet 18, simultaneously opening a port connected with the second three-way ball valve 23 and the butterfly check valve 9 and the other port connected with the second three-way ball valve 23 and the dual-rotor flowmeter 11, and closing a third port of the second three-way ball valve 23.
Step three: then, pumping the dirty oil water in the dirty oil water tank 1 on the ship to the dirty oil water collection cabinet 18 through the dirty oil water pump unit 22 for recovery treatment;
in the operation process, if the differential pressure of the differential pressure sensor 4 exceeds 5bar, or the first pressure sensor 5, the second pressure sensor 8 and the oil content detector 16 give an alarm, the pumping operation of the device is stopped, and the pumping operation is performed again after the overhaul is finished.
Step four: after the sump oil water is collected, the first three-way ball valve 10 is disconnected from the sump oil water tank 1 on the ship, then the device is hoisted to a specified sump oil water storage point, and the third port of the second three-way ball valve 23 is connected with the specified sump oil water storage point through a recovery hose.
Step five: and opening a port connected with the first three-way ball valve 10 and the sump oil water collecting cabinet 18 and a port connected with the first three-way ball valve 10 and the coarse water suction filter 2, closing a third port of the first three-way ball valve 10, simultaneously opening a port connected with the second three-way ball valve 23 and the butterfly check valve 9 and a third port of the second three-way ball valve 23, and closing the other port connected with the second three-way ball valve 23 and the birotor flowmeter 11.
Step six: then the dirty oil water in the dirty oil water collection cabinet 18 is discharged to a specified dirty oil water storage point through the dirty oil water pump set 22.
The invention has the beneficial effects that: the invention has simple structure and convenient use, improves the safety of the discharge process and reduces the possibility of secondary pollution to the environment in the discharge process.
The above-mentioned embodiments are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should fall into the protection scope of the present invention without departing from the design concept of the present invention, and the technical contents of the present invention as claimed are all described in the technical claims.
Claims (9)
1. The utility model provides a dirty water oil recovery unit which characterized in that: the device comprises a first three-way ball valve, a coarse water suction filter, a sump oil water pump set, a second three-way ball valve, a quick-connection short pipe, an oil-resistant rubber hose, an injection pipe, a sump oil water collection cabinet and a plurality of pipelines; an inlet of the coarse water suction filter and an outlet of the sump oil water collecting cabinet are respectively connected with two ports of the first three-way ball valve through pipelines, and a third port of the first three-way ball valve is connected with a suction port of a sump oil water tank on a ship through a recovery hose to suck sump oil water; the outlet of the coarse water suction filter is connected with the inlet of the sump oil water pump set through a pipeline, the outlet of the sump oil water pump set is connected with one port of the second three-way ball valve through a pipeline, the other port of the second three-way ball valve is connected with the inlet of the sump oil water collection cabinet through a pipeline, a quick-connection short pipe, an oil-resistant rubber hose and an injection pipe in sequence, the third port of the second three-way ball valve is connected with a specified sump oil water storage point through a recovery hose, and sump oil water in the sump oil water collection cabinet is discharged and treated.
2. The dirty water oil recovery device according to claim 1, wherein: the device also comprises a differential pressure sensor; and the two ends of the differential pressure sensor are respectively connected with the inlet and the outlet of the coarse water suction filter, the differential pressure of the differential pressure sensor is set to be 5bar, and the blockage condition of the coarse water suction filter is monitored.
3. The dirty water oil recovery device according to claim 1, wherein: a butterfly valve is further arranged on one side, close to the coarse water suction filter, of a pipeline between the coarse water suction filter and the sump oil water pump set, and a butterfly check valve is further arranged on one side, close to the second three-way ball valve, of a pipeline between the sump oil water pump set and the second three-way ball valve.
4. The dirty water oil recovery device according to claim 2, wherein: the vacuum pressure gauge also comprises a first pressure sensor, a vacuum pressure gauge, a pressure gauge and a second pressure sensor; the first pressure sensor and the vacuum pressure gauge are respectively connected with an inlet of the sump oil water pump set, and the pressure gauge and the second pressure sensor are respectively connected with an outlet of the sump oil water pump set; the indication alarm of the first pressure sensor is set to be-1-0 bar, and the indication alarm of the second pressure sensor is set to be 0-10 bar.
5. The dirty water oil recovery device according to claim 4, wherein: the dual-rotor flowmeter is also included; and a double-rotor flowmeter is further arranged on a pipeline between the second three-way ball valve and the quick-connection short pipe, and the double-rotor flowmeter adopts a dirty oil water stainless steel double-rotor-electronic meter head flowmeter.
6. The dirty water oil recovery device according to claim 1, wherein: the sump oil water pump set adopts a portable sump oil centrifugal pump set.
7. The dirty water oil recovery device according to claim 5, wherein: a gooseneck vent pipe is arranged on one side of the upper end of the dirty oil water collecting cabinet and is communicated with the interior of the dirty oil water collecting cabinet in a sealing manner; a high liquid level floating ball alarm device is further arranged on one side of the outer portion of the dirty oil water collecting cabinet, and a flat glass liquid level meter is further vertically arranged on the other side of the outer portion of the dirty oil water collecting cabinet; a discharge valve is further arranged at the bottom end of the other side of the dirty oil water collecting cabinet, and the dirty oil water collecting cabinet is cleaned and discharged through the discharge valve; the upper end intermediate position of sump oil water collection cabinet still is equipped with the oil content detector, the sense terminal of oil content detector extends to the inside position under bias of sump oil water collection cabinet, and its suggestion warning sets up to 15 ppm.
8. The dirty water oil recovery device according to claim 7, wherein: the device also comprises a PLC control panel; the PLC control panel is respectively electrically connected with the differential pressure sensor, the first pressure sensor, the sump oil water pump set, the second pressure sensor, the dual-rotor flowmeter, the high liquid level floating ball alarm device and the oil content detector, and is electrically connected with the 380V/50HZ external power supply.
9. The method for recovering a contaminated water according to any one of claims 1 to 8, characterized by comprising the steps of:
the method comprises the following steps: firstly, hoisting the device to a ship, and connecting a third port of a first three-way ball valve with a suction port of a sump oil water tank on the ship through a recovery hose;
step two: opening a third port of the first three-way ball valve and a port connected with the coarse water suction filter, closing a port connected with the first three-way ball valve and the sump oil water collection cabinet, simultaneously opening a port connected with the second three-way ball valve and the butterfly check valve and the other port connected with the dual-rotor flowmeter, and closing a third port of the second three-way ball valve;
step three: then, pumping the dirty oil water in the dirty oil water tank on the ship to a dirty oil water collection cabinet through a dirty oil water pump set for recovery treatment;
step four: after the sump oil water is collected, the first three-way ball valve is disconnected from a sump oil water tank on the ship, then the device is hoisted to a specified sump oil water storage point, and a third port of the second three-way ball valve is connected with the specified sump oil water storage point through a recovery hose;
step five: opening a port connected with the first three-way ball valve and the sump oil water collecting cabinet and a port connected with the coarse water suction filter, closing a third port of the first three-way ball valve, simultaneously opening a port connected with the second three-way ball valve and the butterfly check valve and a third port of the second three-way ball valve, and closing the other port connected with the dual-rotor flowmeter;
step six: and then the dirty oil water in the dirty oil water collection cabinet is discharged to a specified dirty oil water storage point through a dirty oil water pump set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110478132.5A CN113072113A (en) | 2021-04-30 | 2021-04-30 | Dirty oil water recovery device and recovery method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110478132.5A CN113072113A (en) | 2021-04-30 | 2021-04-30 | Dirty oil water recovery device and recovery method thereof |
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| CN202110478132.5A Pending CN113072113A (en) | 2021-04-30 | 2021-04-30 | Dirty oil water recovery device and recovery method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203264423U (en) * | 2013-05-14 | 2013-11-06 | 嘉兴繁荣电器有限公司 | Filtering alarm control device |
| CN204082113U (en) * | 2014-10-09 | 2015-01-07 | 大庆清源水处理技术有限公司 | Defeated viscous crude lifting device is mixed in down-hole |
| CN207160136U (en) * | 2017-07-26 | 2018-03-30 | 董佩忠 | A kind of abundant water draw-off of standpipe water pump |
| CN209098346U (en) * | 2018-10-31 | 2019-07-12 | 兴化市东方造船厂 | A kind of oily sewage disposal system applied to harbour service support vessel |
| CN215048766U (en) * | 2021-04-30 | 2021-12-07 | 南通润邦海洋工程装备有限公司 | Dirty oil water recovery device |
-
2021
- 2021-04-30 CN CN202110478132.5A patent/CN113072113A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203264423U (en) * | 2013-05-14 | 2013-11-06 | 嘉兴繁荣电器有限公司 | Filtering alarm control device |
| CN204082113U (en) * | 2014-10-09 | 2015-01-07 | 大庆清源水处理技术有限公司 | Defeated viscous crude lifting device is mixed in down-hole |
| CN207160136U (en) * | 2017-07-26 | 2018-03-30 | 董佩忠 | A kind of abundant water draw-off of standpipe water pump |
| CN209098346U (en) * | 2018-10-31 | 2019-07-12 | 兴化市东方造船厂 | A kind of oily sewage disposal system applied to harbour service support vessel |
| CN215048766U (en) * | 2021-04-30 | 2021-12-07 | 南通润邦海洋工程装备有限公司 | Dirty oil water recovery device |
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