CN111874969A - Cooling fresh water circulating system dosing device, use method thereof and ship - Google Patents
Cooling fresh water circulating system dosing device, use method thereof and ship Download PDFInfo
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- CN111874969A CN111874969A CN202010732866.7A CN202010732866A CN111874969A CN 111874969 A CN111874969 A CN 111874969A CN 202010732866 A CN202010732866 A CN 202010732866A CN 111874969 A CN111874969 A CN 111874969A
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- valve
- fresh water
- cabinet body
- cooling fresh
- water
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
- B63H21/383—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling cooling-water
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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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a dosing device of a cooling fresh water circulating system, a using method thereof and a ship, wherein the dosing device of the cooling fresh water circulating system comprises a cabinet body, a dosing valve, a water outlet valve, a water return valve, a water outlet pipe, a water return pipe and a discharge valve, wherein the dosing valve and the discharge valve are respectively arranged at the top and the bottom of the cabinet body, a medicament is added into the cabinet body through the dosing valve, the discharge valve is used for discharging fresh water in the cabinet body, the water outlet valve and the water return valve are both arranged on the side surface of the cabinet body and are both connected with the cabinet body through connecting pipes, the water outlet valve is connected with the cooling fresh water circulating system through the water outlet pipe. This charge device's simple structure, small, because do not have power device, the reliability is higher, and it is convenient to maintain, can make the medicament concentration in the cooling fresh water circulation system reach stable state in the short time, has shortened sample detection's latency greatly, has improved detection efficiency, and can select the installation site in a flexible way, has reduced operating personnel's intensity of labour.
Description
Technical Field
The invention relates to the technical field of ships, in particular to a dosing device of a cooling fresh water circulating system, a using method of the dosing device and a ship.
Background
The existing chemical adding method for a cooling fresh water system on a ship is roughly divided into the following steps: firstly, fresh water is filled into the pipeline after the pipeline is cleaned; then, according to the fresh water amount of the whole system, chemical agents are filled for the first time to prevent the system pipeline from scaling and corroding; and finally, detecting, testing and testing the water sample in the cooling fresh water system every week after the system normally operates, and adding a proper amount of chemical agents. The existing dosing mode has the following defects:
1. the medicament filling point of the whole ship fresh water cooling system is arranged at the highest position of the system (the upper end of a fresh water expansion water tank), the fresh water expansion water tank is also positioned in a chimney enclosure, the space in the enclosure is narrow, the temperature is high, certain dangerous factors exist, and the operating environment of a crew is poor;
2. chemical agents are generally placed in a chemical storage room at an engine room and are far away from an expansion water tank, so that a crew needs to bear a load to go up a surrounding well, and the crew is inconvenient to fill the agents;
3. the ship cooling fresh water system belongs to a closed circulation system, a fresh water expansion tank is positioned at the highest point of the system, and a medicament is filled into the expansion tank and can circulate to the whole system only after a long time, so that the sampling detection result after the medicament is added is influenced;
4. the existing dosing device is expensive, large in size, poor in reliability and high in maintenance difficulty, and a power supply and various probes need to be additionally arranged.
Disclosure of Invention
The invention aims to provide a dosing device of a cooling fresh water circulating system and a using method thereof, which have the advantages of small volume, no power device, simple structure, low cost, flexible installation position, simple using method, quick diffusion of a medicament in the cooling fresh water circulating system and shortened sampling and detecting time.
Another object of the invention is to provide a ship which is relatively inexpensive to build.
In order to achieve the purpose, the invention adopts the following technical scheme:
on the one hand, provide a cooling fresh water circulating system charge device, including the cabinet body, add medicine valve, outlet valve, wet return, outlet pipe, wet return and bleeder valve, add the medicine valve with the bleeder valve sets up respectively the top and the bottom of the cabinet body, the medicament passes through add the medicine valve and join the cabinet is internal, the bleeder valve is used for discharging the internal fresh water of cabinet, the outlet valve with the wet return all sets up the side of the cabinet body and all through the connecting pipe with cabinet body coupling, the outlet valve passes through the outlet pipe is connected with cooling fresh water circulating system, the wet return passes through the wet return is connected with cooling fresh water circulating system.
As a preferable aspect of the present invention, the cooling fresh water circulation system includes a circulation pipe and a circulation pump disposed on the circulation pipe, the water outlet pipe is communicated with the circulation pipe on an inlet side of the circulation pump, and the water return pipe is communicated with the circulation pipe on an outlet side of the circulation pump.
In a preferred embodiment of the present invention, the water outlet valve and the water return valve are both stop check valves.
As a preferable scheme of the invention, the water outlet valve is arranged near the bottom of the cabinet body, and the setting position of the water return valve is higher than that of the water outlet valve.
As a preferable scheme of the invention, the cooling fresh water circulating system dosing device further comprises a funnel, and the funnel is arranged on the dosing valve.
As a preferable scheme of the invention, the cabinet body is cylindrical and comprises a side wall, a top cover and a bottom plate, wherein the side wall is cylindrical, the bottom plate is welded with one end of the side wall, the top cover is detachably connected with the other end of the side wall, the dosing valve is arranged on the top cover, and the discharge valve is arranged below the bottom plate.
As a preferable scheme of the invention, the cabinet body further comprises a plurality of supporting legs, and the supporting legs are connected with the bottom plate.
As a preferable scheme of the present invention, the water outlet pipe and the water return pipe are both hoses.
In another aspect, a method for using a chemical adding device of a cooling fresh water circulation system is provided, which comprises the following steps:
s1, closing a water outlet valve and a water return valve, and opening a discharge valve to discharge fresh water in a cabinet body;
s2, closing the discharge valve, opening a medicine adding valve, adding a medicine into the cabinet body, and then closing the medicine adding valve;
and S3, opening the water outlet valve and the water return valve to dilute the medicament and enter a cooling fresh water circulating system.
In addition, still provide a boats and ships, include the cooling fresh water circulation system charge device of any above-mentioned technical scheme.
The invention has the beneficial effects that:
the chemical feeding device of the cooling fresh water circulating system has the advantages of simple structure, small volume, higher reliability and convenient maintenance due to the absence of a power device. Through opening outlet valve and wet return, make the cabinet body and cooling fresh water circulating system intercommunication, add the return circuit that the medicament accessible outlet pipe and wet return built in the cabinet body and get into cooling fresh water circulating system mesocycle rapidly, make the medicament concentration in the cooling fresh water circulating system reach steady state in the short time promptly, shortened sample detection's latency greatly, improved detection efficiency. In the process of adding the cabinet body into the medicament, the water outlet valve and the water return valve are both in a closed state, so that the cooling fresh water circulating system can keep normal operation, when the medicament adding valve and the discharge valve are both closed, even if the cabinet body is filled with water and the water pressure is high, leakage can not occur, the device does not need to be installed at the highest position of the cooling fresh water circulating system, the installation place can be flexibly selected, and the labor intensity of operators is greatly reduced.
Drawings
FIG. 1 is a schematic sectional view of a chemical adding device of a cooling fresh water circulation system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the cooling fresh water circulation system dosing device according to the embodiment of the invention after being connected with the cooling fresh water circulation system;
fig. 3 is a schematic sectional view of a cabinet according to an embodiment of the present invention.
In the figure:
1. a cabinet body; 11. a side wall; 12. a top cover; 13. a base plate; 14. supporting legs; 2. a dosing valve; 3. a water outlet valve; 4. a water return valve; 5. a water outlet pipe; 6. a water return pipe; 7. a relief valve; 8. a connecting pipe; 9. a funnel; 100. a cooling fresh water circulating system; 110. a circulation pipe; 120. and a circulating pump.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the word "over" a first feature or feature in a second feature may include the word "over" or "over" the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under" a second feature may include a first feature that is directly under and obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Furthermore, in the description of the present invention, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
As shown in fig. 1 and 2, the cooling fresh water circulation system dosing device according to the embodiment of the present invention includes a cabinet 1, a dosing valve 2, a water outlet valve 3, a water return valve 4, a water outlet pipe 5, a water return pipe 6, and a discharge valve 7, where the dosing valve 2 and the discharge valve 7 are respectively disposed at the top and the bottom of the cabinet 1, a chemical is added into the cabinet 1 through the dosing valve 2, the discharge valve 7 is used to discharge fresh water in the cabinet 1, the water outlet valve 3 and the water return valve 4 are both disposed on a side surface of the cabinet 1 and are both connected to the cabinet 1 through a connection pipe 8, the water outlet valve 3 is connected to the cooling fresh water circulation system 100 through the water outlet pipe 5, and the water return valve 4 is connected to the cooling.
The cooling fresh water circulation system charge device of this embodiment's simple structure, small owing to do not have power device, the reliability is higher, and it is convenient to maintain. Through opening outlet valve 3 and wet return 4, make cabinet body 1 and cooling fresh water circulating system 100 intercommunication, add the return circuit that the medicament accessible outlet pipe 5 and wet return 6 in the cabinet body set up and get into cooling fresh water circulating system 100 mesocycle rapidly, make the medicament concentration in the cooling fresh water circulating system 100 reach steady state in the short time promptly, shortened sample detection's latency greatly, improved detection efficiency. In the process of adding the medicament into the cabinet body 1, the water outlet valve 3 and the water return valve 4 are both in a closed state, so that the cooling fresh water circulating system 100 can keep normal operation, and when the medicament adding valve 2 and the discharge valve 7 are both closed, even if the cabinet body 1 is filled with water and the water pressure is high, leakage cannot occur, the device does not need to be installed at the highest position of the cooling fresh water circulating system 100, the installation place can be flexibly selected, and the labor intensity of operators is greatly reduced.
Preferably, the cooling fresh water circulation system 100 includes a circulation pipe 110 and a circulation pump 120 disposed on the circulation pipe 110, the water outlet pipe 5 is communicated with the circulation pipe 110 on the inlet side of the circulation pump 120, and the water return pipe 6 is communicated with the circulation pipe 110 on the outlet side of the circulation pump 120. The water return pipe 6 is connected with the circulating pipeline 110 on the side with larger water pressure, so that the fresh water in the circulating pipeline 110 can be pressed into the water return pipe 6 and enter the cabinet body 1, the water outlet pipe 5 is connected with the circulating pipeline 110 on the side with lower water pressure, so that the fresh water in the cabinet body 1 can smoothly flow into the circulating pipeline 110, a complete circulating loop is formed between the cabinet body 1 and the cooling fresh water circulating system 100, and the medicament in the cabinet body 1 can quickly enter the cooling fresh water circulating system 100 and can be diffused to a state with stable concentration in a short time.
Preferably, the outlet valve 3 and the return valve 4 are both stop check valves, so that the water flow in the circulation loop between the cabinet 1 and the cooling fresh water circulation system 100 always keeps flowing in one direction, and the resistance generated by the reverse flow is prevented from slowing down the diffusion speed of the medicament.
Preferably, the water outlet valve 3 is arranged near the bottom of the cabinet 1, and the setting position of the water return valve 4 is higher than that of the water outlet valve 3. After the medicament is added into the cabinet body 1, the fresh water injected from the water return valve 4 is firstly gathered at the bottom of the cabinet body 1 to dilute the medicament due to the action of gravity, and the diluted medicament can quickly enter the water outlet pipe 5 through the connecting pipe 8 connected with the water outlet valve 3 because the water outlet valve 3 is arranged close to the bottom of the cabinet body 1, so that the medicament can enter the cooling fresh water circulating system 100 in a short time.
In some embodiments, the medicine adding valve 2 is further provided with a funnel 9, and the medicine flows into the cabinet body 1 from the funnel 9 after flowing into the medicine adding valve 2, so that the medicine adding operation is convenient for an operator.
Preferably, as shown in fig. 3, the cabinet body 1 is cylindrical and comprises a side wall 11, a top cover 12 and a bottom plate 13, the side wall 11 is cylindrical, the bottom plate 13 is welded to one end of the side wall 11, the top cover 12 is detachably connected to the other end of the side wall 11, the dosing valve 2 is arranged on the top cover 12, the water outlet valve 3 and the water return valve 4 are both connected to the side wall 11 through a connecting pipe 8, and the discharge valve 7 is arranged below the bottom plate 13. Because top cap 12 and lateral wall 11 can dismantle and be connected, can wash the inside of the cabinet body 1 through opening top cap 12, top cap 12 and lateral wall 11 can adopt flange joint's form to connect to guarantee the leakproofness of connecting through sealed the pad, prevent to leak.
Further, the cabinet body 1 further comprises a plurality of supporting legs 14, and the supporting legs 14 are connected with the bottom plate 13. Through setting up supporting leg 14, for the space of bleeder valve 7 provides the installation, supporting leg 14 makes cabinet body 1 be in the height of the personnel's operation of being convenient for through setting up suitable length, and is more laborsaving and convenient when making operating personnel open or close the valve.
Preferably, the water outlet pipe 5 and the water return pipe 6 are hoses, and the hoses can facilitate and flexible connection between the device and the cooling fresh water circulating system 100, and facilitate installation and change of installation positions.
The embodiment of the invention also provides a use method of the chemical adding device of the cooling fresh water circulating system, which comprises the following steps:
firstly, closing the water outlet valve 3 and the water return valve 4, and opening the discharge valve 7 to discharge the fresh water in the cabinet body 1;
secondly, closing the discharge valve 7, opening the dosing valve 2, adding the medicament into the cabinet body 1, and then closing the dosing valve 2;
finally, the outlet valve 3 and the return valve 4 are opened, so that the chemicals are diluted and enter the cooling fresh water circulation system 100.
The reason why the fresh water in the cabinet body 1 is discharged first and then the medicament is added is that the cabinet body 1 is possibly filled with fresh water, if the fresh water is not discharged first, the medicament is added and then is dispersed in the water with larger volume, the concentration of the medicament becomes lower, and after the water outlet valve 3 and the water return valve 4 are opened, the water flow entering from the water return valve 4 needs to discharge more water so as to discharge most of the dispersed medicament from the cabinet body 1, so that the consumed time is long. If the water in the cabinet body 1 is emptied and then the agent is added, after the water outlet valve 3 and the water return valve 4 are opened, the water flow entering from the water return valve 4 is gathered at the bottom of the cabinet body 1, the depth of the water is shallow, so that the agent is diluted to a lower degree, and when the water surface in the cabinet body 1 is not raised to a higher degree, most of the agent with higher concentration is injected into the cooling fresh water circulating system 100 through the water outlet pipe 5, so that the time for the agent to reach the concentration stability in the cooling fresh water circulating system 100 can be shortened.
After the medicament is filled, the medicine adding valve 2 and the discharge valve 7 are closed, so that the cabinet body 1 is not leaked even if the cabinet body 1 is filled with fresh water at a lower height.
The embodiment of the invention also provides a ship, which comprises the chemical adding device of the cooling fresh water circulating system in any embodiment, and the chemical adding device has no power system, does not need to be provided with a power supply, a probe and other parts, and has greatly reduced manufacturing cost compared with a conventional chemical adding device, so that the construction cost of the ship can be effectively reduced, and the pressure of logistics maintenance can be reduced.
Reference throughout this specification to the description of the terms "preferred," "further," or the like, as used in describing preferred embodiments of the present invention, means that a particular feature, structure, material, or characteristic described in connection with the example or illustration is included in at least one example or illustration of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above examples are only intended to illustrate the details of the invention, which is not limited to the above details, i.e. it is not intended that the invention must be implemented in such detail. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. The utility model provides a cooling fresh water circulating system charge device, its characterized in that includes the cabinet body, adds medicine valve, outlet valve, wet return, outlet pipe, wet return and bleeder valve, add the medicine valve with the bleeder valve sets up respectively the top and the bottom of the cabinet body, the medicament passes through add the medicine valve and join the cabinet is internal, the bleeder valve is used for discharging the internal fresh water of cabinet, the outlet valve with the wet return all sets up the side of the cabinet body and all through the connecting pipe with cabinet body coupling, the outlet valve passes through the outlet pipe is connected with cooling fresh water circulating system, the wet return passes through the wet return is connected with cooling fresh water circulating system.
2. The chemical adding device for the cooling fresh water circulating system according to claim 1, wherein the cooling fresh water circulating system comprises a circulating pipeline and a circulating pump arranged on the circulating pipeline, the water outlet pipe is communicated with the circulating pipeline on the inlet side of the circulating pump, and the water return pipe is communicated with the circulating pipeline on the outlet side of the circulating pump.
3. The dosing device for the cooling fresh water circulating system according to claim 1, wherein the water outlet valve and the water return valve are both stop check valves.
4. The chemical adding device for the cooling fresh water circulating system according to claim 1, wherein the water outlet valve is arranged near the bottom of the cabinet body, and the water return valve is arranged at a position higher than the water outlet valve.
5. The cooling fresh water circulating system dosing device of claim 1, further comprising a funnel, wherein the funnel is arranged on the dosing valve.
6. The chemical adding device for the cooling fresh water circulation system according to claim 1, wherein the cabinet body is cylindrical and comprises a side wall, a top cover and a bottom plate, the side wall is cylindrical, the bottom plate is welded to one end of the side wall, the top cover is detachably connected to the other end of the side wall, the chemical adding valve is arranged on the top cover, and the discharge valve is arranged below the bottom plate.
7. The dosing device for the cooling fresh water circulating system according to claim 6, wherein the cabinet body further comprises a plurality of support legs, and the support legs are connected with the bottom plate.
8. The chemical adding device for the cooling fresh water circulating system according to claim 1, wherein the water outlet pipe and the water return pipe are hoses.
9. The use method of the chemical adding device of the cooling fresh water circulating system is characterized by comprising the following steps of:
s1, closing a water outlet valve and a water return valve, and opening a discharge valve to discharge fresh water in a cabinet body;
s2, closing the discharge valve, opening a medicine adding valve, adding a medicine into the cabinet body, and then closing the medicine adding valve;
and S3, opening the water outlet valve and the water return valve to dilute the medicament and enter a cooling fresh water circulating system.
10. A ship comprising a cooling fresh water circulation system chemical adding device according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010732866.7A CN111874969A (en) | 2020-07-27 | 2020-07-27 | Cooling fresh water circulating system dosing device, use method thereof and ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010732866.7A CN111874969A (en) | 2020-07-27 | 2020-07-27 | Cooling fresh water circulating system dosing device, use method thereof and ship |
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| Publication Number | Publication Date |
|---|---|
| CN111874969A true CN111874969A (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010732866.7A Pending CN111874969A (en) | 2020-07-27 | 2020-07-27 | Cooling fresh water circulating system dosing device, use method thereof and ship |
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| CN (1) | CN111874969A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113291447A (en) * | 2021-06-29 | 2021-08-24 | 南京公诚节能新材料研究院有限公司 | Ship cooling system based on catalyst material |
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| JP2008249275A (en) * | 2007-03-30 | 2008-10-16 | Aquas Corp | Injection method of water treatment agent |
| CN204197263U (en) * | 2014-10-22 | 2015-03-11 | 大连船舶重工集团有限公司 | Boats and ships or ocean engineering realize the cooling system of fresh water of circulation dosing |
| JP2018118534A (en) * | 2017-01-23 | 2018-08-02 | Ｊｆｅエンジニアリング株式会社 | Ship |
| JP2018171558A (en) * | 2017-03-31 | 2018-11-08 | アクアス株式会社 | Chemical adding device and circulation cooling water system |
| CN109252938A (en) * | 2018-10-25 | 2019-01-22 | 广州文冲船厂有限责任公司 | A kind of fresh water cooled medicine system |
| CN110176319A (en) * | 2019-05-27 | 2019-08-27 | 中国船舶重工集团公司第七一九研究所 | A kind of marine PWR center cooling system of fresh water |
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2020
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008249275A (en) * | 2007-03-30 | 2008-10-16 | Aquas Corp | Injection method of water treatment agent |
| CN204197263U (en) * | 2014-10-22 | 2015-03-11 | 大连船舶重工集团有限公司 | Boats and ships or ocean engineering realize the cooling system of fresh water of circulation dosing |
| JP2018118534A (en) * | 2017-01-23 | 2018-08-02 | Ｊｆｅエンジニアリング株式会社 | Ship |
| JP2018171558A (en) * | 2017-03-31 | 2018-11-08 | アクアス株式会社 | Chemical adding device and circulation cooling water system |
| CN109252938A (en) * | 2018-10-25 | 2019-01-22 | 广州文冲船厂有限责任公司 | A kind of fresh water cooled medicine system |
| CN110176319A (en) * | 2019-05-27 | 2019-08-27 | 中国船舶重工集团公司第七一九研究所 | A kind of marine PWR center cooling system of fresh water |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113291447A (en) * | 2021-06-29 | 2021-08-24 | 南京公诚节能新材料研究院有限公司 | Ship cooling system based on catalyst material |
| CN113291447B (en) * | 2021-06-29 | 2022-11-18 | 南京公诚节能新材料研究院有限公司 | Ship cooling system based on catalyst material |
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Application publication date: 20201103 |