Ballast water treatment equipment, a ballast water detoxifying treatment system using the same, and a method for treating the ballast water

A ballast water detoxifying treatment system, comprising:

• a ballast tank storing ballast water;
• an intake pipe connecting a water intake opening and the ballast tank;
• a high pressure pump put in the intake pipe;
• a ballast water treatment equipment put in downstream of the high pressure pump, said ballast water treatment equipment comprising a shear flow generator containing one or more venturi tubes, and a swirl flow generator;
• a fungicide adding device put in downstream of the ballast water treatment equipment, and adding fungicide to the ballast water supplied from the ballast water treatment equipment;
• a water pumping up pipe connecting the ballast tank to the intake pipe upstream of the high pressure pump;
• a drainage pipe connected to the intake pipe downstream of the ballast water treatment equipment;
• a residual fungicide removing device put in the drainage pipe;
• a first changeover valve put in near a diverging point between the intake pipe and the water pumping up pipe;
• and
• a second changeover valve out in near a diverging point between the intake pipe and the drainage pipe.

A method for treating ballast water, comprising:

• filtering ballast water;
• passing through the filtered ballast water to a ballast water treatment equipment comprising a shear flow generator containing one or more venturi tubes, and a swirl flow generator;
• supplying the ballast water to a ballast tank after adding fungicide,
• pumping up the ballast water from the ballast tank to the ballast water treatment equipment;
• removing the residual fungicide in the ballast water with activated carbon;
• and
• draining.

A ballast water detoxifying treatment system comprising:

• a ballast tank storing ballast water;
• an intake pipe connecting a water intake opening and the ballast tank;
• a high pressure pump put in the intake pipe;
• a shear flow generator put in downstream of the high pressure pump, the shear flow generator containing one or more venturi tubes with recesses,
• wherein each of said venturi tube comprises
• an inlet side cross-sectional area reducing part gradually decreasing sectional area along a flow direction,
• an outlet side cross-sectional area enlarging part put in downstream of the inlet side cross-sectional area reducing part, and increasing cross-sectional area along the flow direction,
• a throat put between the inlet side cross-sectional area reducing part and the outlet side cross-sectional area enlarging part,
• a shear flow generating recess opening to the throat;
• a swirl flow generator connected downstream of the shear flow generator,
• wherein the swirl flow generator comprises a cylinder and a diffuser pipe having an inner circumference surface that is increasing in cross-sectional area along the flow direction;
• a fungicide adding device put in downstream of the ballast water treatment equipment, and adding fungicide to the ballast water supplied from the ballast water treatment equipment;
• a water pumping up pipe connecting the ballast tank to the intake pipe upstream of the high pressure pump;
• a drainage pipe connected to the intake pipe downstream of the ballast water treatment equipment;
• a residual fungicide removing device in the drainage pipe;
• a first changeover valve out in near a diverging point between the intake pipe and the water pumping up pipe;
• and
• a second changeover valve put in near a diverging point between the intake pipe and the drainage pipe.

A method for treating ballast water, comprising:

• filtering ballast water;
• passing the filtered ballast water through a ballast water treatment equipment wherein the ballast water treatment equipment comprises:
• a shear flow generator containing one or more venturi tubes with recesses,
• each of said venturi tube comprises
• an inlet side cross-sectional area reducing part gradually decreasing sectional area along a flow direction,
• an outlet side cross sectional area enlarging part put in downstream of the inlet side cross-sectional area reducing part, and increasing cross-sectional area along the flow direction,
• a throat put between the inlet side cross-sectional area reducing part and the outlet side cross-sectional area enlarging part, and
• a shear flow generating recess opening to the throat;
• and
• a swirl flow generator connected downstream of shear flow generator,
• wherein the swirl flow generator comprises a cylinder and a diffuser pine having an inner circumference surface that is increasing in cross-sectional area along the flow direction;
• supplying the ballast water to a ballast tank after adding fungicide,
• pumping up the ballast water from the ballast tank to the ballast water treatment equipment;
• removing the residual fungicide in the ballast water with activated carbon;
• and
• draining.