CN101671063A - Low-pressure high-strength ultraviolet ship ballast water treatment device - Google Patents

Abstract

The invention belongs to the field of ship ballast water treatment devices and particularly relates to a low-pressure high-strength ultraviolet ship ballast water treatment device. An inflow reducingpipe is connected with a device shell through a connecting flange, a holding plate is arranged near the inflow reducing pipe in the device shell, the center of the holding plate is provided with a center shaft of the holding plate and a device center shaft connected between the holding plate and a device end cover, and low-pressure high-strength ultraviolet tubes arranged in groups are installed between the device center shaft and the device shell. Ballast water enters the device from a device water inlet arranged at the front end of the inflow reducing pipe, sterilized by ultraviolet rays andthen discharged from a water outlet arranged at the bottom of the device shell. The device has high automation degree, compact structure, stable work, high sterilization efficiency and good effect inthe application to ballast water sterilization.

Description

Low-pressure high-intensity UV ship ballast water treatment equipment

technical field

The invention belongs to the field of ship ballast water treatment equipment, in particular to a low-pressure high-intensity ultraviolet ship ballast water treatment equipment.

Background technique

Ocean-going ships generally use the increase or decrease of ballast water to adjust the center of gravity of the ship to keep the ship stable. When ships carry out long-distance transportation, especially on ocean voyages, microorganisms will be brought to a new environment through ballast water, posing a greater threat to the safety of the marine environment of other countries and regions. In the past ten years, the problem of microbial invasion caused by ballast water has attracted great attention from the international community. In order to control the problem of exogenous biological invasion caused by the ballast water of ocean-going ships, the International Maritime Organization (IMO) has formulated strict ballast water treatment regulations, but there are very few mature ballast water treatment systems.

At present, the main patents on the ballast water treatment system of ocean-going ships are: patent 02140632.4, which uses the heat generated by the exhaust gas heat exchange generated by the ship to heat the ballast water for disinfection; Apply a voltage between the discharge electrode and the ground electrode to form a strong electric field for discharge, ionize and decompose oxygen and water to form O ₃ and hydroxyl, etc., and then dissolve through the jet to form a free radical solution, which is added to the ballast water delivery pipeline. Kill microorganisms in ballast water; patent 200510046991.8, use electrolysis system to treat ballast water, generate oxidants through electrolysis, including chlorine gas, hypochlorous acid molecules, chlorine dioxide, etc., and kill microorganisms in water together with the action of electric field; patent 200580040948.9, using electrolysis to produce hypochlorous acid to treat ballast water; patent 200680015713.9, treating ballast water by combining mechanical killing methods with jet flow and cavitation effects and ozone treatment methods; patent 200680016920.6, using electromagnetic technology to treat ballast water Heating to kill microorganisms in water; patent 200680020730.1, using bactericide in ballast water to kill microorganisms in water; patent 200710010653.8, using advanced oxidation technology of sulfuric acid free radicals to treat microorganisms in ballast water; patent 200710010538.0, using Microwave treatment kills microorganisms in ballast water.

Contents of the invention

The present invention provides a device for disinfecting ballast water by using high-dose low-pressure ultraviolet rays. The water inlet reducer 2 is provided with a support plate 4, and the center of the support plate 4 is provided with a support plate central axis 5, and an equipment central axis 6 connecting the support plate 4 and the equipment end cover is provided. Between the equipment central axis 6 and the equipment shell Low-voltage high-intensity ultraviolet lamp tubes 7 equidistantly distributed between the bodies 9 are installed, and the lamp tube rectifiers are controlled in groups, with six lamps in each group, so as to evenly adjust the ultraviolet dose; the power of the low-voltage high-intensity ultraviolet lamp tubes 7 is 200-400w/lamp , the ultraviolet dose generated is 100-400mJ/cm ² ; the front end of the water inlet reducer 2 is provided with the equipment water inlet 1, and the bottom of the equipment housing 9 is provided with the water outlet 10.

A quartz sleeve 8 is arranged outside the low-pressure high-intensity ultraviolet lamp tube 7 .

The lamp tube spacing of the low-pressure high-intensity ultraviolet lamp tubes 7 is 5-10 cm.

The device casing 9 is made of 1Cr18Ni9Ti material.

The beneficial effects of the present invention are:

1. Using low-voltage high-strength ultraviolet lamps, it can provide ultraviolet disinfection dosage: 100-400mJ/cm ² , which can not only produce high-dose ultraviolet rays, but also save power consumption.

2. This system has an efficient inactivation effect on seaweed and other plankton existing in the ballast water treatment of ocean-going ships.

3. It has a good inactivation effect on bacteria, viruses and other foreign organisms harmful to marine ecology in seawater.

4. There is no need to add any active substances, and no active substances harmful to the environment will be produced.

5. The equipment has high degree of automation, small footprint, compact structure, stable work and high efficiency.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Figure 2 is a diagram of the internal layout of the ultraviolet lamp.

Labels in the figure:

1-equipment water inlet; 2-water inlet reducer; 3-connecting flange; 4-support plate; 5-support plate central axis;

6-The central axis of the equipment; 7-The low-voltage high-strength ultraviolet lamp tube; 8-The quartz sleeve; 9-The outer wall of the equipment;

10-Water outlet.

Detailed ways

The present invention provides a device for sterilizing ballast water by using high-dose low-pressure ultraviolet rays. The present invention will be further described below through the description of drawings and specific implementation methods.

Figure 1 is a schematic diagram of the overall structure of the present invention. The water inlet reducer 2 is connected to the equipment casing 9 made of 1Cr18Ni9Ti through the connecting flange 3, and the support plate 4 is set in the equipment casing 9 close to the water inlet reducer 2, and the center of the support plate 4 is set to the center of the support plate. axis 5, and set the equipment center axis 6 between the support plate 4 and the equipment end cover, install 36 low-pressure high-intensity ultraviolet lamp tubes 7 arranged at equal intervals between the equipment center axis 6 and the equipment housing 9, every two The distance between the lamp tubes is 7cm, and a quartz sleeve 8 is arranged outside each low-voltage high-intensity ultraviolet lamp 7, and the power of a single low-pressure high-intensity ultraviolet lamp 7 is 300w; A water inlet 1 and a water outlet 10 are provided at the bottom of the equipment housing 9 .

When the present invention works, the ballast water enters the equipment through the water inlet 1 of the equipment, and is discharged from the water outlet 10 after being rapidly sterilized by ultraviolet light inside the equipment. Adjust the ultraviolet output dose of the low-pressure high-intensity ultraviolet lamp tube 7 to 100mJ/cm ² . At this time, the inactivation effect of the device on different algae is shown in Table 1.

Table 1: When the UV dose is 100mJ/ ^cm2 , the inactivation effect of this equipment on different algae

name Inactivation rate Remark Heterocurvium akashiwo 75.9 Algae, Chromophyta dinoflagellates Scutellaria costatum 66.2 Algae, diatoms

Chlamydomonas 58.0 Freshwater algae, Chlorophyta Microcystis aeruginosa 57.3 Freshwater algae, Cyanophyta Cyclotella menie 53.1 Freshwater algae, diatoms Dunaliella salina 45.7 Seaweed, Chlorophyta Nitzschia small crescent 44.1 Algae, diatoms Selina qingdao 32.7 Seaweed, Chlorophyta Pyramis sp. 30.4 Seaweed, Chlorophyta Nitzkiria bark 23.7 Freshwater algae, diatoms Phaeodactylum tricornutum 13.6 Algae, diatoms

Adjust the ultraviolet output dose of the low-pressure high-intensity ultraviolet lamp 7 to 200mJ/cm ² . At this time, the inactivation effect of the device on different algae is shown in Table 2.

Table 2: When the UV dose is 200mJ/ ^cm2 , the inactivation effect of this equipment on different algae

name Inactivation rate Remark Heterocurvium akashiwo 88.5 Algae, Chromophyta dinoflagellates Scutellaria costatum 76.3 Algae, diatoms Dunaliella salina 74.1 Seaweed, Chlorophyta Microcystis aeruginosa 73.4 Freshwater algae, Cyanophyta Nitzschia small crescent 60.9 Algae, diatoms Cyclotella menie 50.4 Freshwater algae, diatoms Chlamydomonas 49.3 Freshwater algae, Chlorophyta Pyramis sp. 30.4 Seaweed, Chlorophyta Phaeodactylum tricornutum 28.3 Algae, diatoms

Nitzkiria bark 26.8 Freshwater algae, diatoms

Adjust the ultraviolet output dose of the low-pressure high-intensity ultraviolet lamp 7 to 300mJ/cm ² . At this time, the inactivation effect of the device on different algae is shown in Table 3.

Table 3: When the UV dose is 300mJ/ ^cm2 , the inactivation effect of this equipment on different algae

name Inactivation rate Remark Heterocurvium akashiwo 100.0 Algae, Chromophyta dinoflagellates Scutellaria costatum 86.3 Algae, diatoms Dunaliella salina 85.2 Seaweed, Chlorophyta Microcystis aeruginosa 77.3 Freshwater algae, Cyanophyta Nitzschia small crescent 70.3 Algae, diatoms Chlamydomonas 57.1 Freshwater algae, Chlorophyta Cyclotella menie 51.4 Freshwater algae, diatoms Phaeodactylum tricornutum 41.2 Algae, diatoms Nitzkiria bark 32.2 Freshwater algae, diatoms Pyramis sp. 30.9 Seaweed, Chlorophyta

Adjust the ultraviolet output dose of the low-pressure high-intensity ultraviolet lamp 7 to 400mJ/cm ² . At this time, the inactivation effect of the device on different algae is shown in Table 4.

Table 4: When the UV dose is 400mJ/ ^cm2 , the inactivation effect of this equipment on different algae

name Inactivation rate Remark Heterocurvium akashiwo 100.0 Algae, Chromophyta dinoflagellates Dunaliella salina 98.2 Seaweed, Chlorophyta Scutellaria costatum 86.8 Algae, diatoms Microcystis aeruginosa 86.1 Freshwater algae, Cyanophyta

Chlamydomonas 59.7 Freshwater algae, Chlorophyta Cyclotella menie 54.3 Freshwater algae, diatoms Phaeodactylum tricornutum 48.5 Algae, diatoms Nitzschia small crescent 42.2 Algae, diatoms Nitzkiria bark 36.9 Freshwater algae, diatoms Fusarium algae 29.5 Freshwater algae, Chlorophyta Pyramis sp. 18.1 Seaweed, Chlorophyta

The equipment has a high degree of automation and does not require human control and management. The ultraviolet intensity is monitored in real time by the online light intensity meter, which can reflect the disinfection dose of the equipment in time. The ultraviolet dose generated is 100-400J/cm ² . Moreover, the operation status of each ultraviolet lamp is reflected in real time by electronic control instruments to ensure the normal operation of the equipment.

Claims (4)

1. low-pressure high-strength ultraviolet ship ballast water treatment device, it is characterized in that, water inlet taper(ed)pipe (2) is connected by joint flange (3) with apparatus casing (9), in apparatus casing (9), locate to be provided with supporting disk (4) near water inlet taper(ed)pipe (2), the center of supporting disk (4) is provided with supporting disk central shaft (5), and the equipment center axle (6) that connects between supporting disk (4) and the equipment end cap is set, the low-pressure high-strength degree quartz burner (7) that equidistantly distributes is installed between equipment center axle (6) and apparatus casing (9), packet mode is adopted in the control of fluorescent tube rectifier, every group of six roots of sensation is with the evenly temper ultraviolet dosage; The power of low-pressure high-strength degree quartz burner (7) is the 200-400w/ lamp, and the ultraviolet dosage of generation is 100-400mJ/cm ²Water inlet taper(ed)pipe (2) front end is provided with equipment water-in (1), and apparatus casing (9) bottom sets out the mouth of a river (10).

2. low-pressure high-strength ultraviolet ship ballast water treatment device according to claim 1 is characterized in that, the outer quartz socket tube (8) that is provided with of described low-pressure high-strength degree quartz burner (7).

3. low-pressure high-strength ultraviolet ship ballast water treatment device according to claim 1 is characterized in that, the fluorescent tube spacing of described low-pressure high-strength degree quartz burner (7) is 5～10cm.

4. low-pressure high-strength ultraviolet ship ballast water treatment device according to claim 1 is characterized in that, described apparatus casing (9) adopts the 1Cr18Ni9Ti material.

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