CN111977865A - Ballast water treatment device for removing electrolytic coupling LED photocatalysis series-connection halogenated matters - Google Patents

Abstract

The invention discloses a ballast water treatment device for removing halogen compounds in electrolytic coupling LED photocatalysis series connection, which comprises a filtering unit, an electrooxidation-LED photocatalysis device and a halogen compound removing device, wherein an electrode and an oxidant adding device are arranged in the electrooxidation-LED photocatalysis device; an electrode is arranged in the halide removing device; the ballast water is pretreated by a filtering unit to remove silt and suspended particles, then enters an electro-oxidation-LED photocatalysis device for biological inactivation, and finally enters a residual chlorine removal device for dehalogenation treatment, so that the toxicity of the ballast water is reduced. When the device is used for ballast water treatment, the multiple treatment methods have synergistic effect, the treatment effect is good, the inactivation rate of aquatic organisms in the treated ballast water is high, and the toxicity harm to natural water is low.

Description

Ballast water treatment device for electrolytically coupled LED photocatalytic series halide removal

technical field

The invention belongs to the technical field of ballast water treatment, and in particular relates to a ballast water treatment device for removing halides in series by electrolytic coupling LED photocatalysis.

Background technique

The function of ship ballast water is to control the draft, stability or stress of the ship, and to maintain the balance of the ship's ballast by inhaling or discharging ballast water, which is a necessary condition for the safe navigation of the ship. However, the ballast water carries a large amount of harmful organisms and pathogenic microorganisms, which need to be purified before being discharged.

The aquatic organisms in ballast water include plankton, algae, microorganisms, spores, etc. The inhalation and off-site discharge of ballast water will cause biological invasion, destroy the ecological balance, and threaten the marine ecology and human safety. Some crustaceans in the ballast water will cause corrosion of the hull and blockage of pipelines, which will pose a safety hazard to the hull. In 2017, the International Convention on the Control and Management of Ships' Ballast Water and Sediments promulgated by the International Maritime Organization (IMO) began to be enforced. Vibrio E. coli less than 1cfu/100mL or 1cfu/g plankton sample.

At present, the main ballast water treatment technologies include displacement method, filtration method, ultraviolet irradiation method and chemical oxidation method. The replacement method requires replacement of more than 3 times the volume of ballast water, which takes a long time and has a narrow application range. Filtration separates contaminants by physical retention. The filtration system generally uses a mesh filter or a filter with a thicker medium, which is difficult to filter and remove for viruses (minimum diameter 0.02 μm), bacteria (0.1 μm) and small protozoa (2-3 μm). Due to the high flow rate and high flow rate when the ballast water is injected and discharged, the requirements for the filter equipment and filter material structure are high. Some of the organisms retained by the filtration are not inactivated in the filter material and still require further processing. The chemical oxidation method kills aquatic organisms and microorganisms by oxidizing agents (sodium hypochlorite, chlorine dioxide and ozone, etc.), and its effect depends on the pH value of the water body, water temperature and contact time. However, oxidants are not easy to store and manage in the hull, and produce carcinogens such as halogenated disinfection by-products (trihalomethanes, haloacetic acids, etc.) and halogenated salts (chlorite, chlorate, and bromate), which are relatively High toxicity risk, and may bring adverse effects such as corrosion of the hull. Ultraviolet irradiation of ballast water can kill bacteria and other harmful aquatic organisms in the water, and the treatment process will not produce secondary pollution. When the influent turbidity of ballast water is high, the transmittance of ultraviolet light in the water body is low, the utilization rate of ultraviolet light is low, and the efficiency of single ultraviolet sterilization or advanced oxidation sterilization is greatly reduced. generate adverse effects.

In Chinese invention patent application CN200510046991.8 (Ship Ballast Water Electrolysis Treatment System), the ballast water is directly electrolyzed in the electrolysis processor 1 to generate high-efficiency oxidants, including chlorine gas Cl ₂ , hypochlorous acid HClO molecules, and chlorine dioxide ClO ₂ , one or more substances in free oxygen O·, hydroxyl OH·, together with the action of the electric field, kill or inactivate the organisms in the ballast water of the ship. The content of COD and TOC in seawater is reduced, and the dissolved oxygen in seawater is increased. Improves the properties of seawater. Among the electrode materials, the anode is DSA electrode (coated titanium electrode), and the cathode is stainless steel. However, the simple electrochemical oxidation treatment method has limited effect on the treatment of ballast water, and the treatment effect is not good. In order to achieve a better treatment effect, further treatment is required, resulting in increased treatment costs.

In the Chinese utility model patent CN201821923695.0 (photoelectric catalytic treatment of ship ballast water processor), the processor includes a hollow shell, a photoelectric catalytic unit is arranged in the casing, and the photoelectric catalytic unit includes a cathode substrate, an anode substrate, and an outer The ultraviolet light source electrically connected to the circuit has a plurality of water flow holes on the anode base and the cathode base respectively, the side of the anode base facing the ultraviolet light source is attached with a photocatalytic film layer for treating ballast water, and the anode base and the cathode base pass through wire connected. The photoelectric catalytic treatment method can kill harmful organisms and algae in the ballast water. In the Chinese utility model patent CN201621134461.9 (a device for ultraviolet sterilization and electrolysis treatment of ship ballast water), the combined action of ultraviolet sterilization and electrolysis is used, and an anode unit is fixed between the ultraviolet lamp tube and the filter device, and the bottom of the ultraviolet lamp tube is fixed with an anode unit. An electrolytic cell is provided, an electrolytic cell is installed on the right end of the quartz sleeve, an anode unit is inlaid inside the conductive device, and a filter device is inlaid below the anode unit, and a cooling device is disposed on the right end of the cathode unit, so Both ends of the heat exchanger are inlaid with ballasts. Both of the above two patent applications utilize the combined effect of ultraviolet and electrolysis, but they are simply superimposed, and the synergistic effect between the two is not effectively utilized, so the treatment effect is poor.

SUMMARY OF THE INVENTION

The problems to be solved by the present invention are the technical problems such as relatively single treatment method and poor treatment effect when the ballast water treatment device in the prior art treats the ballast water.

In order to solve the above technical problems, the present invention discloses a ballast water treatment device for electrolytically coupled LED photocatalytic series removal of halogenated compounds, which can efficiently inactivate aquatic organisms and microorganisms, is environmentally friendly, and is suitable for shipboard operations.

The device includes an electro-oxidation-LED photocatalytic device, and the electro-oxidation-LED photocatalytic device includes an LED ultraviolet light source, an electrode, and an oxidant dosing device; in the LED ultraviolet light source, a plurality of LED lamp beads are evenly arranged on the electro-oxidation-LED light source. On the inner side wall of the LED photocatalytic device; in the electrodes in the electro-oxidation-LED photocatalytic device, the anode and the cathode are staggered to form a water passage; the injection port of the oxidant dosing device is connected to the electro-oxidation-LED photocatalytic device. connected to the water inlet.

Further, the ballast water treatment device also includes a filter unit and a halide removal device, and the filter unit and the halide removal device are respectively located on both sides of the electro-oxidation-LED photocatalytic device; the filter material in the filter unit is Commercially available quartz sand. The water inlet end of the filter unit is connected to the ballast water inlet, and the water outlet end is connected to the water inlet end of the electro-oxidation-LED photocatalytic device; the water outlet end of the electro-oxidation-LED photocatalytic device is connected to the halogen removal device The water inlet end of the halide removal device is connected to the water outlet of the ballast water outlet.

Further, the ballast water treatment device is also provided with an overrunning pipeline, the water inlet end of the overrunning pipeline is connected with the ballast water inlet, and the water outlet end is connected with the water inlet end of the electro-oxidation-LED photocatalytic device. , There is a valve on the overrunning pipeline.

Further, the water outlet of the filter unit is connected to the ballast water outlet through a drainage pipeline, and the drainage pipeline is provided with a valve; the water outlet of the electro-oxidation-LED photocatalytic device is connected to the ballast water outlet through the drainage pipeline. , There is a valve on the drain line.

Further, an oxidant concentration detection device is provided between the electro-oxidation-LED photocatalytic device and the halide removal device.

Further, the preferred LED lamp beads are LED lamp beads with a wavelength of 265 mm; or LED lamp beads with wavelengths of 265 nm and 300 nm are used in combination according to the number ratio of 1:1 or 2:1. Furthermore, the LED lamp beads with wavelengths of 265 nm and 300 nm are evenly arranged across each other.

The oxidant in the oxidant adding device is one or more of hypochlorite, chlorine dioxide, sodium chloride and aluminum chloride. The sodium chloride and aluminum chloride can be directly ionized in the ballast water to generate chloride ions after the addition of sodium chloride and aluminum chloride.

Further, among the electrodes in the electro-oxidation-LED photocatalytic device, the anode is a ruthenium-iridium oxide-coated electrode, and the cathode is a stainless steel mesh. Using electrolytes such as chloride ions and bromide ions in water, electrolysis produces biocides such as hypochlorous acid and hypobromous acid.

Further, electrodes are also provided in the halide removal device, wherein the anode is a graphite electrode, and the cathode is a lead-plated electrode.

In the present invention, the specific sequence of the ballast water treatment process is as follows: the ballast water first enters the filtration unit, then enters the electro-oxidation-LED photocatalytic device for inactivation of aquatic organisms, and finally enters the halogenated compound removal device. Specifically, a filter device is used to remove sediment and suspended particles, initially purify the ballast water, and improve the light transmittance of the ballast water. In the electro-oxidation-LED photocatalytic unit, highly active oxidizing substances are generated by electrolysis of chloride ions, wherein the highly active oxidizing substances include chlorine gas, hypochlorous acid, hypobromous acid, chlorine dioxide, hydroxyl radicals, chlorine-containing radicals, bromine-containing radicals Free radicals also include adsorbed free radicals on electrodes in electro-oxidation-LED photocatalytic devices, such as OH·, Cl·, etc.; that is, chlorine- and bromine-containing oxidizing species, and free radicals. The UV LED lamp beads with long life and not easy to form scale are used to promote the formation of free radicals (hydroxyl radicals, chlorine-containing radicals and bromine-containing radicals, etc.), and coordinate ultraviolet sterilization to promote the inactivation of aquatic organisms and microorganisms. In the halogenated removal device, the halogenated toxic substances are dehalogenated and reduced to reduce the toxicity of residual chlorine and halogenated toxic substances in the ballast water to natural water bodies.

Compared with the existing products, the ballast water treatment device for the electrolytic coupling LED photocatalytic series halide removal of the present invention has the following advantages:

(1) The filter device, the electro-oxidation-LED photocatalytic unit and the halogenated compound removal device are combined in series to improve the inactivation efficiency of aquatic organisms and reduce the discharge of toxic pollutants.

(2) In the electro-oxidation-LED photocatalytic unit, the ruthenium-iridium oxide-coated oxidizing electrode is used to strengthen the chlorine production level, and the LED ultraviolet light is used to promote the photolysis of active chlorine to generate highly selective oxidative radicals such as chlorine-containing free radicals. Inactivation, electric field effect, halogen-containing oxidants (chlorine, hypochlorous acid, hypobromous acid, chlorine dioxide, etc.), free radicals (hydroxyl radicals, chlorine-containing radicals and bromine-containing radicals, etc.) Inactivation of aquatic organisms.

(3) The electro-oxidation-LED photocatalytic unit adopts LED ultraviolet lamp beads to realize flexible configuration of light source wavelength and light intensity to ensure the generation level of active oxidizing substances.

(4) Add a dehalogenation device, use lead-plated cathode to reduce and dehalogenate, and reduce the risk of effluent toxicity.

Description of drawings:

Figure 1: Schematic diagram of a ballast water treatment device for electrolytically coupled LED photocatalytic tandem halide removal.

Figure 2: Enlarged view of the electro-oxidation-LED photocatalytic device.

Figure 3: Section 1-1 in Figure 2.

Figure 4: Section 2-2 in Figure 2.

Figure 5: Algae removal rates at different current densities in the electro-oxidation-LED photocatalytic device.

Figure 6: Concentrations of oxidizing species at different current densities in the electro-oxidation-LED photocatalytic device.

Figure 7: Removal efficiencies of filtration, electro-oxidation, and electro-oxidation-LED photocatalysis alone and in combination for four typical ballast water algal organisms.

Figure 8: Comparison of total chlorine concentration in water treated by electro-oxidation-LED photocatalytic device and dehalogenation device.

Description of reference numerals: 1: filter unit, 2: electro-oxidation-LED photocatalytic device, 3: halide removal device, 4: inlet water pump, 5: drainage pump, 21: chemical pool, 211: chemical pump, 22: Tube mixer, 23: Power source A, 24: LED lamp beads, 25: Stainless steel cathode, 26: Ruthenium-iridium oxide coating electrode, 31: Power source B, 32: Oxidant concentration detection device, 33: Lead-plated cathode, 34: Graphite electrode, 61-63: Valve, 7: Override line.

Detailed ways

The following describes the technical solutions of the present invention in detail through specific embodiments.

As shown in Figure 1, a schematic diagram of a ballast water treatment device for electrolytically coupled LED photocatalytic series removal of halogenated compounds is given, which specifically includes a filter unit 1, an electro-oxidation-LED photocatalytic device 2, a halogenated compound removal device 3, The pipeline system, the ballast water inlet, the ballast water outlet, the electro-oxidation-LED photocatalytic device 2 and the halide removal device 3 share an oxidant concentration detection device 32 . The arrows in Figure 1 show the flow of ballast water or oxidant.

In the filter unit 1, the filter material is commercially available quartz sand. The ballast water treatment device is also provided with an overrunning pipeline 7. The water inlet end of the overrunning pipeline 7 is connected to the ballast water inlet, and the water outlet end is connected to the water entry end of the electro-oxidation-LED photocatalytic device. 7 is provided with a valve 63. The influent ballast water can also directly enter the electro-oxidation-LED photocatalytic device 2 through the overpass pipeline 7 for biological inactivation.

The water outlet of the filter unit 1 is connected to the ballast water outlet through a drainage pipeline, and the drainage pipeline is provided with a valve 61; therefore, when the ballast water is treated, the valve 61 can be opened according to the actual situation, and the filtration process is completed at this time. The ballast water is directly discharged from the ballast water outlet 5 through the drainage pipeline.

The water outlet of the electro-oxidation-LED photocatalytic device is connected to the ballast water drainage port through a drainage pipeline, and a valve 62 is arranged on the drainage pipeline. Therefore, when the ballast water is treated, the valve 62 can be opened according to the actual situation. At this time, the ballast water after the electro-oxidation-LED ultraviolet oxidation treatment is directly discharged from the ballast water outlet 5 through the drainage pipeline.

Figure 2 shows an enlarged view of the electro-oxidation-LED photocatalytic device, and Figures 3 and 4 respectively show cross-sectional views of different sections in Figure 2. The electro-oxidation-LED photocatalytic device 2 includes electrodes, LED ultraviolet light sources, Oxidant dosing device, power supply A, power control device, etc. Among them, among the electrodes in the electro-oxidation-LED photocatalytic device, the anode is a ruthenium-iridium oxide coating electrode 26, and the cathode is a stainless steel mesh cathode 25. The anode and the cathode are staggered to form a water passage, for the ballast water to flow through, and to utilize the chloride ions in the water. Electrolytes such as bromide ions and bromide ions produce biocides such as hypochlorous acid and hypobromous acid.

The LED ultraviolet light source is LED lamp beads 24, and the LED lamp beads 24 are evenly arranged on the side wall of the electro-oxidation-LED photocatalytic device 2, so that each electrolysis unit is irradiated with light. In a specific embodiment, the wavelength of the LED lamp beads is 265 nm; in another specific embodiment, the LED lamp beads have two wavelengths of 265 nm and 300 nm, and the LED lamp beads of the two wavelengths are in accordance with 1:1 or 2: The proportion of 1 number is evenly arranged across the cross.

The oxidant dosing device includes a chemical pool 21, a chemical pump 211, a valve, and a flow meter. The power source A23 electrolyzes the ballast water entering the electro-oxidation-LED photocatalytic device 2 under the control of the power source control device. The oxidant in the chemical pool 21 is (hypochlorite or chlorine dioxide) or chloride ions (sodium chloride, aluminum chloride, etc.), and the chemical is injected into the electro-oxidation-LED photocatalytic unit through a chemical pump. When the valve is opened, the oxidant in the chemical tank 21 flows out into the tubular mixer 22 under the action of the chemical pump 211, and is mixed with the ballast water flowing out from the filter device 1, and then enters the electro-oxidation-LED photocatalytic device 2 for treatment. .

The electro-oxidation-LED photocatalytic device 2 is activated when the ballast water is fresh water or ballast water with high biocidal requirements, and does not need to be activated when the ballast water is high salinity water such as seawater.

The halide removal device 3 includes a power source B31, a power source control device, and electrodes. The cathode of the electrodes is a lead-plated cathode 33, and the anode is a graphite electrode 34, which can be dehalogenated in a targeted manner. After the treatment, the residual chlorine concentration in the water is measured by the oxidant concentration detection device 32. The ballast water with excessive chlorine concentration is circulated through the pipeline (not shown in the figure) and enters the water inlet for repeated dechlorination until the chlorine concentration meets the requirements. What is the chlorine concentration? The need for repeated dechlorination should be determined according to the laws and policies of the ballast water treatment site. When the residual chlorine concentration in the effluent of the electro-oxidation-LED photocatalytic unit is higher than 10mg/L, the halide removal device is started, and when it is lower than 10mg/L, it is not necessary to start the halogen removal device.

The specific sequence of the ballast water treatment process is as follows: the ballast water first enters the filtration device 1, then enters the aquatic organism inactivation device, that is, the electro-oxidation-LED photocatalytic device 2, and finally enters the halide removal device 3. Specifically, the filter device 1 is used to remove sediment and suspended particles, to purify the ballast water preliminarily, and to improve the light transmittance of the ballast water. In the electro-oxidation-LED photocatalytic device 2, highly active oxidizing substances are produced by electrolyzing chloride ions, and the long-life UV LED lamp beads that are not easy to form scale are used to promote the formation of free radicals, and coordinate UV sterilization to promote the inactivation of aquatic organisms and microorganisms. In the halogenated compound removal device 3, the halogenated toxic substances are dehalogenated and reduced to reduce the toxicity hazards of the residual chlorine and halogenated toxic substances in the ballast water to the natural water body.

Figure 5 shows the removal rate of aeruginosa in ballast water under different current densities in the electro-oxidation-LED photocatalytic device. In this embodiment, the characteristic wavelength of the LED lamp bead is 265 nm, and the oxidant is sodium chloride. The total oxidant concentration is shown in Figure 6. It can be seen from Figure 5 that the electro-oxidation-LED photocatalytic device has a good algae removal effect, and the algae removal rate increases with the increase of the current density, and increases with the increase of the hydraulic residence time. When the current density is 150mA/cm ² , the algae removal rate with a hydraulic retention time of 3 seconds is -3.54, and the number of live algae in the effluent is about 3 cells/mL, which meets the IMO effluent standard. When the power density is greater than 150 mA/cm ² , no living algal cells can be detected in the water. When the hydraulic retention time is 1 second and the current density is 200mA/ ^cm2 , the algae removal rate is -3.68, and the number of live algae in the effluent is about 2cell/mL, which meets the IMO effluent standard.

Figure 6 shows the change of the total oxidant concentration under different current densities in the electro-oxidation-LED photocatalytic device, which can reflect the oxidation capacity of the reaction device. In this embodiment, the characteristic wavelength of the LED lamp bead is 265 nm, and the oxidant is selected from sodium chloride, and the addition amount is based on the chloride ion concentration of 300 mg/L in the influent water. It can be seen from Figure 6 that the total oxidized species produced by the electro-oxidation-LED photocatalytic device increases linearly with the increase of the current density, and increases with the increase of the hydraulic residence time. At a hydraulic retention time of 1 second, the current density increased from 10 mA/cm ² to 200 mA/cm ² and the total oxidizing species concentration increased from 1.25 to 40.65 mg/L. When the hydraulic retention time was 3 seconds, the current density increased from 10 mA/cm ² to 200 mA/cm ² and the total oxidizing species concentration increased significantly from 4.57 to 140.38 mg/L. It shows that the current density has a significant effect on the formation of oxidizing substances and the inactivation of aquatic organisms.

Figure 7 shows the removal efficiencies of filtration, electro-oxidation and electro-oxidation-LED photocatalysis alone and in combination on four typical ballast water algae organisms, which can reflect the biological inactivation ability of the reaction device. In this embodiment, two kinds of LED lamp beads are used in combination, and the characteristic wavelengths are 265 nm and 300 nm respectively, and 24 of the two kinds of lamp beads are installed evenly and staggered. The oxidant is selected from sodium chloride, and the chloride ion concentration in the influent water is 200 mg/L. In addition, the oxidant chlorine dioxide is added to the influent water, and the addition amount is based on the chlorine dioxide concentration in the influent water 10 mg/L. The hydraulic retention time in the electrolysis device is 1.0 seconds, the current density is 200 mA/cm ² , and the total oxidant concentration in the electrolysis device is about 30 mg/L. The initial concentration of algae in the influent water was 2×10 ⁵ /ml. It can be seen from Figure 7 that the filtration-electro-oxidation-LED photocatalysis has the highest inactivation efficiency for the four algae. The removal rate of the 4 species of algae by filtration alone is less than 10%; the oxidant of the single electrolysis product will be consumed by other substances in the water, and the removal effect on algae is limited (about 40%). The coupling of filtration and electro-oxidation can effectively improve the algae removal effect ( about 60%). Electro-oxidation coupled with LED photocatalysis can significantly improve the removal of algae. Further, the inactivation rates of four typical algae after filtration-electro-oxidation-LED photocatalysis treatment are all higher than 80%. It shows that the three treatment methods of filtration, electro-oxidation and LED photocatalysis show synergistic effects.

Figure 8 is a comparison of the total chlorine concentration in the water treated by the electro-oxidation-LED photocatalytic device and the dehalogenation device, which can reflect the dehalogenation capacity of the reaction device. In this embodiment, two kinds of LED lamp beads are used in combination, and the characteristic wavelengths are 265 nm and 300 nm respectively, and 24 of the two kinds of lamp beads are installed evenly and staggered. The oxidant is selected from sodium chloride, and the chloride ion concentration in the influent water is 200 mg/L. In addition, the oxidant chlorine dioxide is added to the influent water, and the addition amount is based on the chlorine dioxide concentration in the influent water 10 mg/L. The hydraulic retention time in the electrolysis device was 1.0 seconds, the current density was 200 mA/cm ² , and the total oxidant concentration in the electrolysis device was 35 mg/L. The initial concentration of algae in the influent water was 2×10 ⁵ /ml. It can be seen from Fig. 8 that the total chlorine concentration of the four kinds of algae-containing ballast water after electro-oxidation treatment is about 30 mg/L, while the total chlorine concentration of the electro-oxidation-LED photocatalytic system is slightly increased (35 mg/L). This indicates that electro-oxidation and LED photocatalysis have a certain synergistic effect, which can promote the generation of chlorine-containing oxidative substances during the electro-oxidation process.

In addition, after being treated by the dehalogenation device, the total chlorine concentration in the ballast water was significantly reduced, both lower than 2 mg/L, regardless of the electro-oxidation alone or the synergistic treatment of electro-oxidation and LED photocatalysis. It shows that electrolytic dehalogenation can effectively reduce the concentration of chlorinated substances in water.

The above are only preferred embodiments of the present invention and are not intended to limit the invention. Any modification, equivalent replacement, improvement, etc. made within the design concept of the present invention shall be included within the protection scope of the present invention. .

Claims (10)

1. The ballast water treatment device of electrolytic coupling LED photocatalytic series halide removal is characterized in that: comprise electro-oxidation-LED photocatalytic device, and described electro-oxidation-LED photocatalytic device comprises LED ultraviolet light source, electrode, oxidant cast In the LED ultraviolet light source, a plurality of LED lamp beads are evenly arranged on the inner sidewall of the electro-oxidation-LED photocatalytic device; in the electrodes in the electro-oxidation-LED photocatalytic device, the anode and the cathode are staggered to form A water passage; the dosing port of the oxidant dosing device is connected to the water inlet end of the electro-oxidation-LED photocatalytic device. 2. The ballast water treatment device for removing halides in series with electrolytically coupled LED photocatalysis as claimed in claim 1, wherein the ballast water treatment device further comprises a filter unit, a halide removal device, and a filter unit. The water inlet end of the filter unit is connected to the ballast water inlet, and the water outlet end is connected to the water inlet end of the electrooxidation-LED photocatalytic device. ; the water outlet end of the electro-oxidation-LED photocatalytic device is connected with the water inlet end of the halide removal device; the water outlet end of the halide removal device is connected with the ballast water outlet. 3. The ballast water treatment device for removing halides in series with electrolytically coupled LED photocatalysis as claimed in claim 2, wherein the ballast water treatment device is further provided with an overrunning pipeline, the overrunning pipeline The water inlet end is connected with the ballast water inlet, the water outlet is connected with the water inlet end of the electro-oxidation-LED photocatalytic device, and a valve is provided on the overrunning pipeline. 4. The ballast water treatment device of claim 2, wherein the water outlet of the filter unit is connected to the ballast water outlet through a drainage pipeline, and the drainage pipe A valve is arranged on the road; the water outlet of the electro-oxidation-LED photocatalytic device is connected to a ballast water drain through a drainage pipeline, and a valve is arranged on the drainage pipeline. 5. The ballast water treatment device for removing halides in series with electrolytically coupled LED photocatalysis as claimed in claim 2, characterized in that: between the electro-oxidation-LED photocatalysis device and the halide removing device, there is a Oxidant concentration detection device. 6 . The ballast water treatment device of claim 1 , wherein the LED lamp beads have a wavelength of 265 nm. 7 . 7. The ballast water treatment device for electrolytically coupled LED photocatalytic series halide removal according to claim 1, wherein the LED lamp beads are LED lamp beads with wavelengths of 265nm and 300nm respectively according to 1:1 Or a 2:1 ratio configuration. 8 . The ballast water treatment device for electrolytically coupled LED photocatalytic series halide removal according to claim 7 , wherein the LED lamp beads with wavelengths of 265 nm and 300 nm respectively are uniformly arranged across each other. 9. The ballast water treatment device for removing halides in series with electrolytically coupled LED photocatalysis as claimed in claim 1, characterized in that: in the electrodes in the electro-oxidation-LED photocatalytic device, the anode is a ruthenium iridium oxide coating. layer electrode, and the cathode is stainless steel mesh. 10. The ballast water treatment device for electrolytically coupled LED photocatalytic series halide removal as claimed in claim 2, wherein the halide removal device is provided with electrodes, wherein the anode is a graphite electrode, and the cathode is a Lead-plated electrodes.

Images