Ballast water treatment device and ballast water treatment method
A technology of treatment device and treatment method, applied in water treatment device, natural water body treatment, water/sewage treatment, etc., can solve the problems of bactericide residue, corrosion of water treatment device, adverse effect of bactericide supply device or bypass pipeline, etc.
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Embodiment approach 1
[0023] [Ballast water treatment unit]
[0024] refer to figure 1 The structure of the ballast water treatment apparatus 1 which concerns on Embodiment 1 which is one Embodiment of this invention is demonstrated.
[0025] The ballast water treatment device 1 is a device installed in a ship, and sterilizes ballast water pumped into the ship and guides it to a ballast tank 60 installed in the ship. The ballast water treatment device 1 mainly includes a ballast pipe 11, a ballast pump 10, a filter device 20 (filter), a sterilant supply unit 30, a supply pipe 36, a flow measurement unit 41, a concentration measurement unit 42, and a mixer 50 and the control unit 70 .
[0026] The ballast pipe 11 is connected to the ballast tank 60 and constitutes a supply channel for guiding seawater pumped into the ship to the ballast tank 60 . The ballast pipe 11 has one pipe port through which seawater flows in, and the other pipe port connected to the ballast tank 60 . Raw water (generally ...
Embodiment 1
[0087] In this example, the simulated figure 1 A prototype treatment unit of the ballast water treatment unit 1 is shown. exist figure 1 In the ballast water treatment device, the filter device 20 uses a polyolefin filter with a mesh size of 40 μm. The sterilant supply unit 30 has 30 containers with an internal volume sufficient to store 2 g of the bactericide, which is 2 mm in diameter particles containing trichloroisocyanuric acid, and 2 g of the bactericide is put into each container in advance. The opening and closing of the bottom plate of each container is individually controlled by the control part 70. As shown in FIG. The bottom plate 34 in the closed state stores the sterilizing agent 33 in the container 31 , and when the bottom plate is in the open state, the sterilizing agent 33 in the container 31 falls and is supplied to the ballast pipe 11 . In this example, the TRO concentration of the ballast water in the ballast tank 60 was set to 10±1 mg / L, and water treat...
Embodiment 2
[0094] In Example 2, the difference lies in the use of a bactericide with a particle diameter of 2.5 mm, which contains 98% by mass of trichloroisocyanuric acid, and 2% by mass of carboxymethylcellulose calcium salt (disintegrated Auxiliary) and water treatment were performed in the same manner as in Example 1 except that. Since the available chlorine concentration of the bactericide is 88%, the computing unit in the control unit 70 calculates that 2 g of the bactericide should be introduced into the ballast piping 11 at intervals of 63 seconds by the following calculation. The control unit 70 supplies 2 g of the sterilizing agent to the ballast piping 11 at intervals of 63 seconds.
[0095] 2(g)×0.88 / {167(L / min)×10(mg / L)}=63(seconds)
[0096] Also in Example 2, similarly to Example 1, the temporal change of the TRO concentration of the ballast water in the ballast tank 60 was monitored by the concentration measuring unit 42 at intervals of 5 minutes. The monitoring results ...
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