CN114294078A - Marine diesel engine exhaust gas cleaning system - Google Patents
Marine diesel engine exhaust gas cleaning system Download PDFInfo
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- CN114294078A CN114294078A CN202210001533.6A CN202210001533A CN114294078A CN 114294078 A CN114294078 A CN 114294078A CN 202210001533 A CN202210001533 A CN 202210001533A CN 114294078 A CN114294078 A CN 114294078A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention provides a marine diesel engine exhaust gas cleaning system which comprises a cleaning unit, a neutralizing unit, a water-oil separating unit and a dirt unit, wherein the cleaning unit can remove particulate matters in diesel engine exhaust gas, and the neutralizing unit can remove oxysulfide in the diesel engine exhaust gas. The marine diesel engine waste gas cleaning system provided by the invention converts waste gas into clean gas, clean water and dirt, so that the pollution of the waste gas to the environment is avoided; in addition, the cleaning system provided by the invention can clean the waste gas when the diesel engine works, the generated clean gas and clean water can be discharged at any time in the advancing process of the ship, the dirty slag is discharged at fixed points, the cleaning is timely, and the cleaning efficiency is higher.
Description
Technical Field
The invention relates to the technical field of ships, in particular to a marine diesel engine exhaust gas cleaning system.
Background
The flue gas of the marine diesel engine contains a large amount of atmospheric pollutants, wherein the majority of the atmospheric pollutants are particulate matters and oxysulfide, and the oxysulfide is easily combined with water in the air to form acid rain, acid mist, chemical smog and the like, so that the flue gas is one of main substances causing atmospheric pollution and has great harm to the ecological environment of the earth and the health of human beings. Therefore, the treatment system for the exhaust gas discharged by the ship power device is vigorously researched at home and abroad to adapt to the strict limit on the sulfur content of the ship fuel in the future.
Disclosure of Invention
In view of the defects of the prior art, the invention provides a marine diesel engine exhaust gas cleaning system, which comprises a cleaning unit, a neutralization unit, a water-oil separation unit and a sludge unit, wherein the marine diesel engine exhaust gas cleaning system provided by the invention converts exhaust gas into clean gas, clean water and sludge, so that the pollution of the exhaust gas to the environment is avoided; in addition, the cleaning system provided by the invention can clean the waste gas when the diesel engine works, the generated clean gas and clean water can be discharged at any time in the advancing process of the ship, the dirty slag is discharged at fixed points, the cleaning is timely, and the cleaning efficiency is higher.
To achieve the above and other related objects, the present invention provides an exhaust gas cleaning system for a marine diesel engine, comprising:
the cleaning unit comprises a fresh water circulating pump, an exhaust gas cooler and a circulating cabinet, and is provided with a cleaning unit input end, a cleaning unit first output end and a cleaning unit second output end, wherein the exhaust gas cooler is connected with the fresh water circulating pump, ship exhaust gas enters the exhaust gas cooler through the cleaning unit input end, and clean gas generated in the cleaning unit is discharged to the air through the cleaning unit first output end; the circulating cabinet is connected with the exhaust gas cooler and is used for receiving circulating fresh water from the exhaust gas cooler and generated excessive moisture, the circulating fresh water enters the fresh water circulating pump again, and the excessive moisture is output to the cleaning unit through a second output end of the cleaning unit;
the neutralizing unit is provided with a first neutralizing unit input end, a second neutralizing unit input end and a neutralizing unit output end, and the first neutralizing unit input end is communicated with the second cleaning unit output end;
the water-oil separation unit is provided with a water-oil separation unit input end, a water-oil separation unit first output end, a water-oil separation unit second output end and a water-oil separation unit third output end, the water-oil separation unit input end is communicated with the neutralization unit output end, the water-oil separation unit first output end is communicated with the neutralization unit second input end, the water-oil separation unit second output end is used for discharging cleaning water generated in the cleaning process, and the water-oil separation unit third output end is used for discharging dirt generated in the cleaning process.
Optionally, the cleaning unit further includes a heat exchanger, located between the fresh water circulation pump and the exhaust gas cooler, for cooling the circulating fresh water provided by the fresh water circulation pump.
Optionally, the washing unit further comprises a seawater cooling pump connected to the heat exchanger for supplying seawater to the heat exchanger to cool the circulating fresh water.
Optionally, the neutralizing unit includes:
one end of the water discharging cabinet is connected with the first input end of the neutralization unit, and the other end of the water discharging cabinet is connected with the output end of the neutralization unit;
the neutralizing device is communicated with the water discharging cabinet and is used for adding a neutralizing agent into the redundant water to generate clean water;
a storage device in communication with the neutralization device for storing and providing neutralizing agent to the neutralization device.
Optionally, the neutralization unit further includes a PH detection device disposed between the first input end of the neutralization unit and the water discharge tank.
Optionally, the water-oil separation unit comprises:
the water-oil separator is communicated with the water discharge cabinet and used for separating dirt in the cleaning water;
and the oil content detector is communicated with the water-oil separator and the drainage water tank and is used for detecting the oil concentration in the cleaning water.
Optionally, the first output end of the water-oil separation unit is connected with the oil content detector, and is used for discharging clean water with oil concentration greater than 15 ppm.
Optionally, the second output end of the water-oil separation unit is connected with the oil content detector and is used for discharging cleaning water with oil concentration less than or equal to 15ppm
Optionally, the marine diesel engine exhaust gas cleaning system further comprises a sludge unit connected to the water-oil separation unit.
Optionally, the dirty slag unit includes:
the sewage residue bin is communicated with the water-oil separator and is used for storing the sewage residues;
and the sewage residue pump is communicated with the sewage residue bin and is used for discharging the sewage residue.
The marine diesel engine exhaust gas cleaning system provided by the invention at least has the following beneficial effects:
the invention provides a marine diesel engine waste gas cleaning system which comprises a cleaning unit, a neutralizing unit, a water-oil separating unit and a dirt unit, wherein the cleaning unit can remove particulate matters in diesel engine waste gas, the generated clean gas is directly discharged into the atmosphere, the neutralizing unit can remove oxysulfide in the diesel engine waste gas, the generated dirt is removed in the water-oil separating unit, the clean water can be directly discharged into the environment, the dirt is temporarily stored in the dirt unit, and the dirt is discharged after a ship is in shore. The marine diesel engine waste gas cleaning system provided by the invention converts waste gas into clean gas, clean water and dirt, so that the pollution of the waste gas to the environment is avoided; in addition, the cleaning system provided by the invention can clean the waste gas when the diesel engine works, the generated clean gas and clean water can be discharged at any time in the advancing process of the ship, the dirty slag is discharged at fixed points, the cleaning is timely, and the cleaning efficiency is higher.
Drawings
FIG. 1 shows a schematic diagram of an exhaust gas cleaning system of a marine diesel engine provided as an embodiment.
Description of the element reference numerals
10 cleaning Unit 201 neutralization Unit first input
11 fresh water circulating pump 202 neutralization unit second input
12 exhaust gas cooler 203 neutralization unit output
13 circulation cabinet 30 water-oil separation unit
14 heat exchanger 31 water-oil separator
32 oil content detector of 15 sea water cooling pump
101 cleaning unit input 33 three-way valve
102 first output end of cleaning unit 301 input end of water-oil separation unit
103 cleaning unit second output 302 water-oil separation unit first output
20 neutralization unit 303 water-oil separation unit second output end
21 third output end of water-oil separation unit of drain water tank 304
22 PH detection device 40 dirt unit
23 neutralizing device 41 dirt bin
24 storage device 42 sludge pump
25 ventilating pipe
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and although the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation, the form, quantity, position relationship and proportion of the components in actual implementation can be changed freely on the premise of implementing the technical solution of the present invention, and the layout form of the components may be more complicated.
Examples
The embodiment provides an exhaust gas cleaning system of a marine diesel engine, which comprises a cleaning unit 10, a neutralizing unit 20, a water-oil separating unit 30 and a dirt unit 40, as shown in fig. 1.
Referring to fig. 1, the wash unit 10 comprises a fresh water circulation pump 11, an exhaust gas cooler 12, a circulation tank 13, a heat exchanger 14 and a seawater cooling pump 15, the wash unit 10 further having a wash unit input 101, a wash unit first output 102 and a wash unit second output 103, wherein:
the fresh water circulating pump 11 is connected to the exhaust gas cooler 12, and a heat exchanger 14 is further provided therebetween, the fresh water circulating pump 11 supplies circulating fresh water for exhaust gas cleaning, and the circulating fresh water is cooled in the heat exchanger 14 and then flows into the exhaust gas cooler 12. The ship exhaust gas enters the exhaust gas cooler 12 through the input end 101 of the cleaning unit, the ship exhaust gas is cleaned in the exhaust gas cooler 12 by the circulating fresh water to generate clean gas, and the clean gas is discharged to the air through the first output end 102 of the cleaning unit. The circulation tank 13 is connected to the exhaust gas cooler 12 and located below the exhaust gas cooler 12, the liquid generated after cleaning flows into the circulation tank 13 under the action of gravity, and since the cooled circulating fresh water absorbs heat when cleaning the exhaust gas, the liquid flowing into the circulation tank 13 includes not only the circulating fresh water but also some excess moisture generated by heat absorption, wherein the circulating fresh water flows into the fresh water circulating pump 11 again, and the excess moisture exceeding the capacity of the circulation tank 13 flows out of the cleaning unit 10 through the second output end 103 of the cleaning unit. In the present embodiment, the fresh water circulation pump 11 has two pump heads, one of which is used as a backup.
The cleaning unit 10 further includes a seawater cooling pump 15, the seawater cooling pump 15 is connected to the heat exchanger 14, and is configured to provide seawater to the heat exchanger 14 to cool the circulating fresh water, that is, the seawater and the circulating fresh water perform heat exchange in the heat exchanger 14, and the seawater after absorbing heat is discharged from the marine diesel engine exhaust gas cleaning system provided in this embodiment. In this embodiment, the seawater cooling pump 15 has two pump heads, one of which is on standby.
As shown in fig. 1, the neutralization unit 20 includes a drain water tank 21, a PH detection device 22, a neutralization device 23, and a storage device 24, the neutralization unit 20 further having a neutralization unit first input 201, a neutralization unit second input 202, and a neutralization unit output 203, wherein:
the first input end 201 of the neutralization unit is communicated with the second output end 103 of the cleaning unit, and the redundant moisture enters the water discharge tank 21 of the neutralization unit through the first input end 201 of the neutralization unit. A PH detection device 22 is also arranged between the water discharge cabinet 21 and the first input end 201 of the neutralization unit, and can detect the PH value of the redundant water in the water discharge cabinet 21; the PH detection device 22 is communicatively connected to the neutralization device 23, and can transmit a detected signal to the neutralization device 23. When the excess moisture is detected to be acidic, the neutralizing device 23 can provide a neutralizing agent to the drain tank 21, and the neutralizing agent reacts with the excess moisture to generate clean water, the clean water has a neutral pH value, and the clean water flows out of the neutralizing unit 20 through the neutralizing unit output 203. As an example, the neutralizing agent may be a sodium hydroxide solution.
In this embodiment, a storage device 24 is further provided in the neutralization unit 20, and the storage device 24 is connected to the neutralization device 23 for storing and supplying the neutralization agent to the neutralization device 23.
In this embodiment, a ventilation pipe 25 is further disposed between the first input end 201 of the neutralization unit and the second output end 103 of the cleaning unit, and the ventilation pipe 25 is communicated with air for releasing air pressure in the pipeline to avoid over-pressure in the pipeline.
As shown in fig. 1, the water-oil separation unit 30 includes a water-oil separator 31 and an oil content detector 32, and the water-oil separation unit 30 further has a water-oil separation unit input 301, a water-oil separation unit first output 302, a water-oil separation unit second output 303, and a water-oil separation unit third output 304, wherein:
the input end 301 of the water-oil separation unit is communicated with the output end 203 of the neutralization unit, and the cleaning water flows into the water-oil separation unit 30 through the input end 301 of the water-oil separation unit. On one hand, the oil content detector 32 is connected with the water-oil separator 31, the cleaning water separates dirt from the water-oil separator 31, the dirt is discharged to the dirt unit 40 through the third output end 304 of the water-oil separation unit, and the cleaning water enters the oil content detector 32 for oil concentration detection; on the other hand, the oil detector 32 is also connected directly to the outlet 203 of the neutralization unit, i.e. the clean water can also enter the oil detector 32 directly without passing through the water oil separator 31.
As an example, a three-way valve 33 is further disposed between the oil content detector 32 and the second output 303 of the water-oil separation unit, and if the oil content detector 32 detects that the oil concentration in the clean water is less than or equal to 15ppm, the clean water is discharged to the outside through the second output 303 of the water-oil separation unit; if the oil concentration in the clean water is detected to be greater than 15ppm, the clean water returns to the drain water tank 21 through the first output end 302 of the water-oil separation unit, and enters the water-oil separator 31 for further water-oil separation.
As shown in fig. 1, the sludge unit 40 includes a sludge bin 41 and a sludge pump 42. The dirty residue unit 40 is connected to the water-oil separation unit 30, the dirty residue generated by the water-oil separation unit 30 is discharged to the dirty residue bin 41 through the third output end 304 of the water-oil separation unit, and the dirty residue bin 41 is used for storing the dirty residue. The sludge pump 42 is connected with the sludge bin 41 and is used for discharging the sludge.
The invention provides a marine diesel engine exhaust gas cleaning system which comprises a cleaning unit, a neutralizing unit, a water-oil separating unit and a dirt unit, wherein the cleaning unit can remove particulate matters in diesel engine exhaust gas, generated clean gas is directly discharged into the atmosphere, the neutralizing unit can remove oxysulfide in the diesel engine exhaust gas, generated dirt is removed in the water-oil separating unit, clean water can be directly discharged into the environment, and dirt is temporarily stored in the dirt unit and then discharged after a ship is in shore. The marine diesel engine waste gas cleaning system provided by the invention converts waste gas into clean gas, clean water and dirt, so that the pollution of the waste gas to the environment is avoided; in addition, the cleaning system provided by the invention can clean the waste gas when the diesel engine works, the generated clean gas and clean water can be discharged at any time in the advancing process of the ship, the dirty slag is discharged at fixed points, the cleaning is timely, and the cleaning efficiency is higher.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. An exhaust gas cleaning system for a marine diesel engine, comprising:
the cleaning unit comprises a fresh water circulating pump, an exhaust gas cooler and a circulating cabinet, and is provided with a cleaning unit input end, a cleaning unit first output end and a cleaning unit second output end, wherein the exhaust gas cooler is connected with the fresh water circulating pump, ship exhaust gas enters the exhaust gas cooler through the cleaning unit input end, and clean gas generated in the cleaning unit is discharged to the air through the cleaning unit first output end; the circulating cabinet is connected with the exhaust gas cooler and is used for receiving circulating fresh water from the exhaust gas cooler and generated excessive moisture, the circulating fresh water enters the fresh water circulating pump again, and the excessive moisture is output to the cleaning unit through a second output end of the cleaning unit;
the neutralizing unit is provided with a first neutralizing unit input end, a second neutralizing unit input end and a neutralizing unit output end, and the first neutralizing unit input end is communicated with the second cleaning unit output end;
the water-oil separation unit is provided with a water-oil separation unit input end, a water-oil separation unit first output end, a water-oil separation unit second output end and a water-oil separation unit third output end, the water-oil separation unit input end is communicated with the neutralization unit output end, the water-oil separation unit first output end is communicated with the neutralization unit second input end, the water-oil separation unit second output end is used for discharging cleaning water generated in the cleaning process, and the water-oil separation unit third output end is used for discharging dirt generated in the cleaning process.
2. The marine diesel engine exhaust gas cleaning system of claim 1, wherein the cleaning unit further comprises a heat exchanger located between the fresh water circulating pump and the exhaust gas cooler for cooling the circulating fresh water provided by the fresh water circulating pump.
3. The marine diesel exhaust gas cleaning system of claim 2, wherein the cleaning unit further comprises a seawater cooling pump connected to the heat exchanger for supplying seawater to the heat exchanger to cool the circulating fresh water.
4. The marine diesel engine exhaust gas cleaning system of claim 1, wherein the neutralization unit comprises:
one end of the water discharging cabinet is connected with the first input end of the neutralization unit, and the other end of the water discharging cabinet is connected with the output end of the neutralization unit;
the neutralizing device is communicated with the water discharging cabinet and is used for adding a neutralizing agent into the redundant water to generate clean water; a storage device in communication with the neutralization device for storing and providing neutralizing agent to the neutralization device.
5. The marine diesel exhaust gas cleaning system of claim 4, wherein the neutralization unit further comprises a pH detection device disposed between the neutralization unit first input and the blowdown water tank.
6. The marine diesel engine exhaust gas cleaning system of claim 4, wherein the water-oil separation unit comprises:
the water-oil separator is communicated with the water discharge cabinet and used for separating dirt in the cleaning water;
and the oil content detector is communicated with the water-oil separator and the drainage water tank and is used for detecting the oil concentration in the cleaning water.
7. The marine diesel engine exhaust gas cleaning system of claim 6, wherein the first output of the water-oil separation unit is connected to the oil content detector for discharging clean water with an oil concentration greater than 15 ppm.
8. The marine exhaust gas cleaning system according to claim 6, wherein the second output of the water-oil separation unit is connected to the oil content detector for discharging clean water having an oil concentration of 15ppm or less.
9. The marine diesel engine exhaust gas cleaning system of claim 6, further comprising a sludge unit connected to the water-oil separation unit.
10. The marine diesel engine exhaust gas cleaning system of claim 9, wherein the dirty slag unit comprises:
the sewage residue bin is communicated with the water-oil separator and is used for storing the sewage residues;
and the sewage residue pump is communicated with the sewage residue bin and is used for discharging the sewage residue.
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| CN202210001533.6A CN114294078B (en) | 2022-01-04 | 2022-01-04 | Marine diesel engine exhaust gas cleaning system |
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| CN202210001533.6A CN114294078B (en) | 2022-01-04 | 2022-01-04 | Marine diesel engine exhaust gas cleaning system |
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