CN107226516B - Process and device for treating by-product hydrogen in electrolytic ship ballast water treatment process - Google Patents
Process and device for treating by-product hydrogen in electrolytic ship ballast water treatment process Download PDFInfo
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- CN107226516B CN107226516B CN201710574881.1A CN201710574881A CN107226516B CN 107226516 B CN107226516 B CN 107226516B CN 201710574881 A CN201710574881 A CN 201710574881A CN 107226516 B CN107226516 B CN 107226516B
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- hydrogen
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- liquid separation
- ballast 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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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
- C02F2103/08—Seawater, e.g. for desalination
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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
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
A process for treating the by-product hydrogen generated by the treating process of ship ballast water by electrolytic method includes such steps as gas-liquid separation of the electrolyte discharged from seawater electrolyzer, mixing the separated hydrogen with air in hydrogen-air mixing unit to obtain easily combustible gas mixture, drying, and burning. The invention has the technical effects that: when the electrolytic device of the ballast water treatment system is operated, the electrolyte generated by electrolysis is firstly subjected to gas-liquid separation and pretreatment and then directly combusted, so that the byproduct hydrogen is effectively treated, the safety of a ship is ensured, the efficiency of the electrolytic device is improved through heat recovery, and compared with the existing ballast water treatment process flow in a ship cabin by an electrolytic method, the electrolytic device has the advantages of simple equipment, low cost, no need of installing a longer hydrogen discharge pipeline and reduction of leakage risk.
Description
Technical Field
The invention relates to a process for treating hydrogen which is a byproduct of operation of an electrolytic ballast water treatment device in a ship engine room and an adopted treatment device.
Background
The electrolytic ship ballast water treatment system is arranged in a ship engine room, an electrolysis device can generate a byproduct, namely hydrogen in the operation process, the hydrogen which is not generated is treated by manufacturers of the existing ballast water treatment devices and is directly injected into a ship ballast tank through a ballast pipeline, and the ballast pipeline and the ballast tank have the risk of hydrogen aggregation, so that the potential safety hazard is large; some manufacturers dilute the hydrogen to a safe concentration by a dilution method and then discharge the dangerous gas to a main deck of the ship through a large-caliber hydrogen discharge air duct.
Disclosure of Invention
The invention aims to provide a process and a device for treating by-product hydrogen in the process of treating ballast water of an electrolytic ship, which aim to solve the problems that in the prior art, separated hydrogen needs to be diluted by a fan and is discharged above a main deck of the ship through a large-diameter pipeline, the equipment cost is high, the installation difficulty is high, a hydrogen discharge pipeline is long, and the risk of leakage exists.
The technical scheme of the invention is as follows: a process for treating by-product hydrogen in an electrolytic ship ballast water treatment process is characterized by comprising the following process flows: firstly, carrying out gas-liquid separation on electrolyte discharged by a seawater electrolysis device, then mixing the separated hydrogen with air according to a proportion to form mixed gas easy to burn, drying the mixed gas, and finally burning the dried mixed gas.
The volume ratio of hydrogen to air in the mixed gas is 4-60%, and the pressure of the mixed gas is greater than 0.03 MPa.
The device for implementing the treatment process of the byproduct hydrogen in the electrolytic ship ballast water treatment process is characterized by comprising a gas-liquid separation unit, a hydrogen and air mixing unit, a dryer and a combustor which are sequentially connected, wherein an outlet of a seawater electrolysis device for discharging hydrogen is connected with an inlet of the gas-liquid separation unit, a gas outlet of the gas-liquid separation unit is connected with one inlet of the hydrogen and air mixing unit, the other inlet of the air mixing unit is connected with a compressed air source, an outlet of the air mixing unit is connected with the combustor through the dryer, and an ignition device is arranged in the combustor.
The gas-liquid separation unit consists of a cyclone separator and a buffer tank, the bottom end of the cyclone separator is connected with the top end of the buffer tank, a liquid level meter is arranged on one side of the buffer tank, and a liquid outlet is arranged at the bottom of the buffer tank.
The heat recovery device is arranged in the combustor, seawater introduced into the seawater electrolysis device flows through the heat recovery device, and heat energy generated by hydrogen combustion is utilized to preheat the seawater.
The hydrogen and air mixing unit adopts an ejector.
The length of a connecting pipeline between the seawater electrolysis device and the gas-liquid separation unit is not more than 6 m.
The top outlet of the gas-liquid separation unit, the ejector, the dryer and the combustor are provided with a detection cover, the detection cover is of a bottom opening structure, and the top in the detection cover is provided with a hydrogen probe.
The invention has the technical effects that: when the electrolytic device of the ballast water treatment system is operated, the electrolyte generated by electrolysis is firstly subjected to gas-liquid separation and pretreatment and then directly combusted, so that the byproduct hydrogen is effectively treated, the safety of a ship is ensured, the efficiency of the electrolytic device is improved through heat recovery, and compared with the existing ballast water treatment process flow in a ship cabin by an electrolytic method, the electrolytic device has the advantages of simple equipment, low cost, no need of installing a longer hydrogen discharge pipeline and reduction of leakage risk.
Drawings
FIG. 1 is a schematic view of the configuration of a hydrogen processing apparatus according to the present invention.
Detailed Description
Referring to fig. 1, the apparatus for treating hydrogen gas, which is a byproduct of an electrolytic ship ballast water treatment process, according to the present invention includes a gas-liquid separation unit 5, a hydrogen gas and air mixing unit 7, a dryer 8, and a burner 9, which are sequentially connected, wherein an outlet of an existing seawater electrolysis apparatus 2 discharging an electrolyte (containing hydrogen gas) is connected to an inlet 5a of the gas-liquid separation unit 5, a gas outlet 5b of the gas-liquid separation unit 5 is connected to one inlet 7a of the hydrogen gas and air mixing unit 7, the other inlet 7b of the air mixing unit 7 is connected to a compressed air source, an outlet 7c of the air mixing unit 7 is connected to the burner 9 through the dryer 8, and an automatic ignition device 12 is provided in the burner 9. In the figure, a seawater pump 1, a flowmeter 3 and a pressure gauge 4 which are sequentially connected with a seawater introducing pipeline are matched devices of a seawater electrolysis device 2, and the seawater electrolysis device belongs to the conventional technology.
The gas-liquid separation unit 5 consists of a cyclone 51 and a buffer tank 52, the bottom end of the cyclone 51 is connected with the top end of the buffer tank 52, a liquid level meter 53 is arranged on one side of the buffer tank 52, a liquid outlet 5c is arranged at the bottom of the buffer tank 52, and a dosing pump 11 for performing subsequent treatment on discharged liquid is arranged at the liquid outlet 5 c. The buffer tank 52 is used for stabilizing the outlet pressure at the bottom of the cyclone separator, and the efficiency and the operation flexibility of the cyclone separator are fully ensured.
A heat recovery device 91 is arranged in the combustor 9, seawater introduced into the seawater electrolysis device 2 flows through the heat recovery device 91, and the seawater is preheated by heat energy generated by hydrogen combustion. The heat recovery device 91 is a heat exchanger and may be any heat exchanger, such as the illustrated coil arrangement.
The hydrogen and air mixing unit 7 adopts an ejector, one inlet 7b of the ejector is connected with high-pressure air (6-10 bar), the other inlet 7a of the ejector is connected with hydrogen separated by the cyclone separator, the hydrogen and the compressed air are mixed into mixed gas with the volume ratio of 4% -60%, and the pressure of the mixed gas is more than 0.03 MPa.
The length of a connecting pipeline between the seawater electrolysis device 2 and the gas-liquid separation unit 5 is not more than 6m, so that excessive hydrogen is prevented from being accumulated in the pipeline, and the leakage risk is reduced.
The top outlet of the gas-liquid separation unit 5, the top of the ejector 7, the top of the dryer 8 and the top of the combustor 9 are provided with a detection cover 6, the detection cover 6 is of a bottom opening structure, and the top in the detection cover 6 is provided with a hydrogen probe 10.
When the seawater electrolysis device works, the electrolyte containing hydrogen discharged from the seawater electrolysis device 2 passes through the gas-liquid separation unit 5, the hydrogen is separated from the electrolyte, diluted and pressurized by the ejector 7, then enters the dryer 8 for drying, and finally enters the combustor 9 for combustion; the heat generated by combustion is used for heating the seawater at the inlet of the seawater electrolysis device through the heat recovery device 91 in the combustor 9, and the increase of the temperature of the seawater can improve the electrolysis efficiency of the seawater electrolysis device 2 and reduce the electrolysis energy consumption; meanwhile, a detection cover 6 is arranged at the top outlet of the gas-liquid separation unit 5, the top of the ejector 7, the top of the dryer 8 and the top of the combustor 9, a hydrogen probe 10 is arranged at the top of the detection cover 6, and when hydrogen leakage is detected, an alarm is triggered and the ship is shut down, so that the safety in a ship cabin is fully guaranteed. It is necessary to ensure that the buffer tank 52 inside the gas-liquid separation unit 5 cannot be filled with liquid during operation.
Claims (3)
1. A process for treating by-product hydrogen in an electrolytic ship ballast water treatment process is characterized by comprising the following process flows: firstly, carrying out gas-liquid separation on electrolyte discharged by a seawater electrolysis device, then mixing the separated hydrogen with air according to a proportion to form mixed gas easy to combust, drying the mixed gas, and finally combusting the dried mixed gas;
a device for implementing the treatment process comprises a gas-liquid separation unit, a hydrogen and air mixing unit, a dryer and a combustor which are sequentially connected, wherein an outlet of a seawater electrolysis device for discharging hydrogen is connected with an inlet of the gas-liquid separation unit, a gas outlet of the gas-liquid separation unit is connected with one inlet of the hydrogen and air mixing unit, the other inlet of the air mixing unit is connected with a compressed air source, an outlet of the air mixing unit is connected with the combustor through the dryer, and an ignition device is arranged in the combustor;
a heat recovery device is arranged in the combustor, seawater introduced into the seawater electrolysis device flows through the heat recovery device, and heat energy generated by hydrogen combustion is utilized to preheat the seawater;
the hydrogen and air mixing unit adopts an ejector;
the length of a connecting pipeline between the seawater electrolysis device and the gas-liquid separation unit is not more than 6 m;
the top outlet of the gas-liquid separation unit, the ejector, the dryer and the combustor are provided with a detection cover, the detection cover is of a bottom opening structure, and the top in the detection cover is provided with a hydrogen probe.
2. The process for treating by-product hydrogen in the process of treating ballast water of an electrolytic ship as claimed in claim 1, wherein the volume ratio of hydrogen to air in the mixed gas is 4-60%, and the pressure of the mixed gas is more than 0.03 Mpa.
3. The process of claim 1, wherein the gas-liquid separation unit comprises a cyclone separator and a buffer tank, the bottom end of the cyclone separator is connected with the top end of the buffer tank, a liquid level meter is arranged on one side of the buffer tank, and a liquid outlet is arranged at the bottom of the buffer tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574881.1A CN107226516B (en) | 2017-07-14 | 2017-07-14 | Process and device for treating by-product hydrogen in electrolytic ship ballast water treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574881.1A CN107226516B (en) | 2017-07-14 | 2017-07-14 | Process and device for treating by-product hydrogen in electrolytic ship ballast water treatment process |
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| Publication Number | Publication Date |
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| CN107226516A CN107226516A (en) | 2017-10-03 |
| CN107226516B true CN107226516B (en) | 2020-02-18 |
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| CN201710574881.1A Active CN107226516B (en) | 2017-07-14 | 2017-07-14 | Process and device for treating by-product hydrogen in electrolytic ship ballast water treatment process |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108633870B (en) * | 2018-05-11 | 2021-03-12 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Marine organism prevention system applied to pneumatic pressing marine work platform |
| CN109368745A (en) * | 2018-10-18 | 2019-02-22 | 九江精密测试技术研究所 | A kind of ship electrolysis ballast water treatment system dehydrogenation device |
| CN112630377B (en) * | 2020-11-26 | 2022-12-20 | 青岛双瑞海洋环境工程股份有限公司 | Test system for simulating hydrogen removal separation effect in chlorine production by electrolysis |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757978A (en) * | 2016-04-23 | 2016-07-13 | 广东合即得能源科技有限公司 | Shipborne heat pump water heater system and heating method |
| CN205556140U (en) * | 2016-03-02 | 2016-09-07 | 青岛双瑞海洋环境工程股份有限公司 | A compact removal of hydrogen device for branch road electrolysis ship ballast water processing system |
| CN106591874A (en) * | 2016-12-09 | 2017-04-26 | 海南金海浆纸业有限公司 | System and method for comprehensively utilizing chlorate electrolysis hydrogen |
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- 2017-07-14 CN CN201710574881.1A patent/CN107226516B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205556140U (en) * | 2016-03-02 | 2016-09-07 | 青岛双瑞海洋环境工程股份有限公司 | A compact removal of hydrogen device for branch road electrolysis ship ballast water processing system |
| CN105757978A (en) * | 2016-04-23 | 2016-07-13 | 广东合即得能源科技有限公司 | Shipborne heat pump water heater system and heating method |
| CN106591874A (en) * | 2016-12-09 | 2017-04-26 | 海南金海浆纸业有限公司 | System and method for comprehensively utilizing chlorate electrolysis hydrogen |
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| CN107226516A (en) | 2017-10-03 |
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