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Filtering unit and ballast water production equipment provided with same

A technology for filtration units and manufacturing devices, applied in filtration separation, stationary cartridge filters, pipes for emptying/ballasting, etc., can solve problems such as the impact of alien species on the ecosystem

Inactive Publication Date: 2012-01-11
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ballast water is discharged overboard when loading cargo at a port, but for ocean-going vessels, it is pointed out that there is a problem that aquatic organisms contained in ballast water are exchanged in multiple countries and affect the ecosystem as alien species.

Method used

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  • Filtering unit and ballast water production equipment provided with same
  • Filtering unit and ballast water production equipment provided with same
  • Filtering unit and ballast water production equipment provided with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6、 comparative example 1

[0135] A verification experiment was performed using the depth filter 10 of this embodiment. The used depth filter is a hollow cylinder with a length of 250 mm, an outer diameter of 60 mm, and an inner diameter of 30 mm, and the apertures are each 1 μm (Example 1), 3 μm (Example 2), 5 μm (Example 3), and 10 μm (Example 4). ), 15 μm (Example 5), 25 μm (Example 6), 30 μm (Comparative Example 1), and the axis of the depth filter 10 is set in a manner inclined at 45° relative to the horizontal plane. When filtering natural seawater (water temperature 26° C.) as raw water with a flow rate of 25 L / min, measure the change in turbidity (the turbidity of raw seawater is 5.5 NTU). The measurement results are shown in Table 5. The larger the pore diameter, the lower the pressure difference, but when the pore diameter is larger than 25 μm, the turbidity of the treated water becomes high, which is not within the practical range.

[0136] [table 5]

[0137] Filter Pore Size (μ...

Embodiment 7、 comparative example 3

[0147] Use a depth filter with a pore diameter of 3 μm (hollow cylindrical shape with an outer diameter of 60 mm, an inner diameter of 30 mm, and a length of 250 mm) to filter natural seawater (water temperature 26°C) at a flow rate of 25 L / min. At this time, for continuous filtration (Comparative Example 3) and the case (Example 7) in which air backwashing (air pressure 100 kPa, 5 seconds) was performed every 3 minutes of filtration (Example 7) were compared with each other. The results are shown in Table 8. In the case of continuous filtration, the pressure difference rose sharply at 30 minutes due to the clogging of the filter, and the seawater was hardly able to circulate thereafter. However, in the case of air backwashing, the pressure difference remained stable after 600 minutes.

[0148] [Table 8]

[0149]

[0150] Figure 13 It is a schematic system diagram of the ballast water manufacturing apparatus of 6th Embodiment of this invention. and Figure 11 The diffe...

Embodiment 8～12、 comparative example 4～5

[0163] A verification experiment was performed using the depth filter 10 of this embodiment. The used depth filter is a hollow cylinder with a length of 250mm, an outer diameter of 60mm, and an inner diameter of 30mm, and the apertures are each 1 μm (Example 8), 3 μm (Example 9), 10 μm (Example 10), and 15 μm (Example 11). ), 25 μm (Example 12), 30 μm (Comparative Example 4), 50 μm (Comparative Example 5), and the axis of the depth filter is set in a manner inclined at 45° relative to the horizontal plane. As raw water, it contains 3.0×10 per 1L 2 Seawater containing animal plankton (the smallest part is more than 50μm), and 1.5×10 per 1cc 4 Seawater (water temperature 25°C) containing phytoplankton (8-12 μm in size) was filtered at a flow rate of 25 L / min, and the number of plankton present in the filtered water was actually measured. The results are shown in Table 9.

[0164] [Table 9]

[0165]

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Abstract

The invention refers to a filtering unit and ballast water production equipment provided with same. The filtering system (1) in ballast water production equipment in a ship (S) is provided with a filtering unit (4) for filtering raw water (RW) taken into the ship (S) and supplying the filtered raw water to a ballast tank (6), a gas supply path (12) for supplying compressed air (A) to a depth filter (10) that forms a filtering membrane in the filtering unit (4) to thereby clean the depth filter, and a discharge path (14) for discharging the compressed air (A) that has cleaned the depth filter (10), together with the raw water (RW) in the depth filter (10), to the outside of the ship (S), the discharge path being connected to the filtering unit (4), wherein the pore diameter of the filtering membrane that forms the depth filter (10) falls within the range of 1-25 [mu]m.

Description

[0001] related application [0002] This application claims the following priorities, which are hereby incorporated by reference as a part of the present application by referring to the entirety of them: Japanese Patent Application No. 2009-32872 filed on February 16, 2009, August 2009 Japanese Patent Application 2009-185223 filed on the 7th, Japanese Patent Application 2009-189188 filed on August 18, 2009, and Japanese Patent Application 2009-205570 filed on September 7, 2009. technical field [0003] The present invention relates to a ballast water manufacturing device mounted on a ship such as a cargo ship, for example. Background technique [0004] For example, when no cargo is loaded on a ship, especially a cargo ship, measures are taken to stabilize the ship by loading seawater or the like into ballast tanks installed inside the ship in order to lower the center of gravity of the ship. Ballast water is discharged overboard when cargo is loaded in a port, but for ocean...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D29/11B01D29/66B63B13/00C02F1/32C02F1/50C02F1/76C02F1/78
CPCB01D29/11B01D29/66B01D61/14B63B13/00C02F1/32C02F1/44C02F1/50
Inventor 井上敬道西山正一田岛康宏
Owner KURARAY CO LTD
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