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IMO Approvaled Ballast Water Treatment System

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IMO Approvaled Ballast Water Treatment System

IMO Approvaled Ballast Water Treatment System

1.Treatment Technology of BWMS System

The treating process of BWMS is mainly consisted of the following three procedures:

Filtration ---The ballast water is filtrated by an automatic backwashing filter with 50µm screen to remove marine organisms larger than 50µm.

Disinfection --- A small side stream of the filtered ballast water is delivered to the electrolytic unit to generate the oxidants of high concentration (mainly sodium hypochlorite solution), then the oxidants are injected back into the main ballast stream to provide effective disinfection.

Sodium hypochlorite solution as a very effective germicide can be kept in ballast water for a certain period to effectively kill the plankton, spores, larvae and pathogens contained in the ballast water to meet D-2 standard.

Neutralization --- The residual TRO level of the treated ballast water below 0.1ppm, then the treated ballast water can be directly discharged. If the residual TRO level of the treated ballast water over 0.1ppm, neutralizer (sodium thiosulfate solution) is added into the de-ballast pipe to neutralize residual oxidants instantly automatically.

2. Disinfection principleCore technology

When seawater flows through the electrolyzer, decomposition reactions take place on the electrode surfaces, with chlorine produced at the anode and hydrogen gas at the cathode.

The reaction principle is as follows:

Anode: 2Cl- Cl2 + 2e

Cathode: 2H2O + 2e 2OH- + H2

Chlorine gas can be dissolved in water to produce hypochlorous acid and hydrochloric acid rapidly:

Cl2 + H2O HOCl + Cl- + H+

So the whole reaction is:

NaCl + H2O NaOCl + H2

Sodium hypochlorite solution as a very effective germicide can be kept in ballast water for a certain period to effectively kill the plankton, spores, larvae and pathogens contained in the ballast water. This technology has been widely practiced in water treatment industries like medical sterilization, water treatment fields for many years.

3. BWMS Working Process

IMO Approvaled Ballast Water Treatment System

4. BWMS Component

IMO Approvaled Ballast Water Treatment System

Small volume and reasonable space

High treatment capacity

Good filtering effect

Low pressure loss and flush swimmingly

Especially suitable for atrocious sea water conditions

Pressure difference control, time set control and manual control

5. Electrolysis Unit

IMO Approvaled Ballast Water Treatment System

Small volume and high efficiency of the switching power of the Transformer Rectifier
Reliable and high electrolysis efficiency of Tubular-plate Electrolyzer
The volume of electrolyzer Module remains for different treatment capacity
The life of core equipment component- electrolyzer can reach the ship service life requirement
Own the Independent Intellectual Property Rights of the core components

6. Neutralization Unit

IMO Approvaled Ballast Water Treatment System

Manual control mode and automatic control mode.

When TRO concentrations of the discharge ballast water lower than the IMO specified value, the system does not start. Neutralization Unit automatically and ballast water discharge outboard directly.

When TRO concentration of the discharge ballast water higher than the IMO specified value, the system start Neutralizer Unit automatically and inject the neutralization which could eliminate and neutralize the residual TRO. The flow of neutralization is controlled by the system automatically.

7. Specification of BWMS System

Model

Treatment Capacity

Flow Rate to Electrolyzer

Required Power

Dimension

Filter (mm)

Electrolysis Unit (mm)

(m3/h)

(m3/h)

(AC KVA)

LWH

LWH

BC-300

100-300

6

15

3000600800

250018002200

BC-500

301-500

6

25

3300600800

260018002300

BC-1000

501-1000

12

50

3300600800

290023002200

BC-1500

1001-1500

20

75

34008001070

300026002100

BC -2000

1501-2000

20

100

33001500800

330025002200

BC -2500

2001-2500

36

125

340018001070

350029002400

BC -3000

2501-3000

36

150

340018001070

350029002400

BC -3500

3001-3500

36

175

340018001070

380024002500

BC -4000

3501-4000

36

200

35003300770

380024002600

BC -5000

4001-5000

45

250

35003600770

400028002600

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