Seawater electrolysis and ultraviolet radiation integrated marine exhaust multi-pollutants comprehensive treatment method and device thereof

A technology for comprehensive treatment and pollutants, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problem of increased initial investment and maintenance costs, limited denitrification rate, and seawater electrolytes. Easy to get dirty and blocked

CN105498490AInactive Publication Date: 2016-04-20DALIAN MARITIME UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-04-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a seawater electrolysis and ultraviolet radiation integrated marine exhaust multi-pollutants comprehensive treatment method, which comprises the following steps: preparing a sodium hypochlorite solution by a diaphragm-free seawater electrolysis method, adjusting pH value of the sodium hypochlorite solution, carrying out ultraviolet radiation treatment to obtain a sodium hypochlorite solution containing strong oxidizing ROS, mixing the sodium hypochlorite solution containing strong oxidizing ROS and flue gas to be treated so as to obtain flue gas containing water-soluble high-valence acidic harmful pollutants and acid waste liquid, treating by a seawater wet processing, purifying the flue gas and directly discharging the purified flue gas into the atmosphere, and separating and purifying the waste liquid. The invention also discloses a seawater electrolysis and ultraviolet radiation integrated marine exhaust multi-pollutants comprehensive treatment device. By using seawater as a raw material, the strong oxidizing absorbent is prepared on line. Gas-liquid reaction and absorption effects are enhanced, power consumption of electrolysis is reduced, system economy is raised, and potential safety hazard of shipping business that is brought by transport and storage of chemicals is effectively avoided.
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Description

technical field

[0001] The invention belongs to the technical field of prevention and control of air pollution caused by ships, and in particular relates to a comprehensive treatment method and device for multi-pollutants of ship exhaust gas integrated with electrolysis of seawater and ultraviolet radiation. Background technique

[0002] With the continuous growth of the global economy, the shipping industry has achieved rapid development, and the tonnage and number of ocean-going ships have also increased significantly. In order to reduce operating costs, most merchant ships use heavy residual oil in the refining process as fuel, resulting in more and more serious air pollution caused by ocean-going ships.

[0003] According to the statistics in the "Clean Air Blueprint" released by the Hong Kong Environmental Protection Agency in 2013, in 2011, sulfur oxides (SOx) accounted for 54%, nitrogen oxides (NOx) accounted for 33%, and PM10 accounted for 37% of Hong Kong's marine e...

Examples

Embodiment 1

[0068] A method for comprehensively treating multi-pollutants of ship exhaust gas by integrating electrolysis of seawater and ultraviolet radiation, comprising the following steps:

[0069] S1, prepare sodium hypochlorite solution by electrolysis of seawater without diaphragm;

[0070] S2. In the previous flue gas treatment process, the waste liquid obtained after seawater wet treatment was separated and purified and mixed with the sodium hypochlorite solution to adjust the pH value of the sodium hypochlorite solution. The obtained sodium hypochlorite solution had a pH value of 5;

[0071] S3, subjecting the solution obtained in step S2 to ultraviolet irradiation treatment to obtain a sodium hypochlorite solution containing strong oxidizing ROS;

[0072] S4, mixing the sodium hypochlorite solution containing strong oxidizing ROS with the flue gas to be treated;

[0073] S5, the flue gas containing the high-valent acidic harmful pollutants that are easily soluble in water and ...

Embodiment 2

[0076] A ship exhaust multi-pollutant comprehensive treatment device integrated with electrolysis of seawater and ultraviolet radiation, including a main seawater pump 1, a diaphragmless electrolytic cell 2, an ultraviolet radiation reactor 3, a washing tower 4, and a separation purifier 5. The input end of the seawater pump 1 is communicated with the suction port 6 of the seabed door, the output end of the main seawater pump 1 is communicated with the discharge port 7 of the seabed door, and the output end of the main seawater pump 1 is connected with the discharge port 7 of the seabed door. A branch I9 communicated with the input end of the filter I8 and a branch II11 communicated with the input end of the feed pump 10 are provided, and the other end of the filter I8 communicates with the input end of the diaphragm-less electrolytic cell 2, so The output end of the diaphragmless electrolyzer 2 is communicated with the input end of the ultraviolet irradiation reactor 3 through...