Van Duc Supplying Water Treatment System

Line filter grade for production:

The source well water through the cooling tower lowers the source water temperature below 32 degrees. Forming 2 filter lines operating in parallel in the sequence iron reduction – softening – fine filtration, each line has a processing capacity of  45m3/hour.

Iron removal filter:  Water passes through the layer of material filter gravel water, sand filter material. can reduce heavy metals such as copper, zinc, chromium, nickel and radioactive substances… absorb about 90% of oil content, safe for use in water supply for frozen seafood production and processing. The good filtering capacity of this device is applied to reduce the load and protect the filter matrix of the rear 5 – 10 micron filter elements.

Softening:  The water after the iron removal filter goes through the water softener. Here the ions that make up the water hardness (Ca2+, Mg2+…) are removed from the water by the action of the  resin particles. Through the process of ion exchange, the resin retains on the surface the ions that make the water hard, and at the same time releases Na+ ions. Resin beads will be reconstituted with NaCl salt solution after inert operation time.

Fine filtration:  The water after being softened goes into the fine filtration device with  5 – 10 micron filter elements made of polypropylene fiber with a large filter matrix. This device retains all residual and suspended particles in the water larger than 5 -10 microns in size. After the time of use, the filters are removed and reactivated with dilute HCl acid solution. The filtered water has reached the physicochemical criteria.

Disinfection:  Use Chlorine to disinfect water after going through the filtration process with a concentration of solution (0.1 – 1%). Control the chlorine residue of the treated water within the allowable range (0.5 – 1ppm). The water after the sterilization process meets the standard 98/83 EC both in terms of physical, chemical and microbiological criteria, and is eligible for water supply for the production process.

Line filter for boiler

Coagulation – settling process:  Coagulation is the first and essential process in feed water treatment technology.

Coagulation treatment is to add a chemical to the water that causes many small suspended particles to combine into larger particles and heavy enough to settle.

The type of coagulant selected in technology is Poly Aluminum Chloride (PAC) which is a new generation aluminum alum that exists in the form of a macromolecule with many advantages over alum alum sulphate but has a higher settling efficiency. -5 times, fast flocculation time, little change in pH of water, no need or little use of auxiliaries, no need for complicated equipment and operations, no turbidity when using too little or too much PAC. Moreover, PAC has the ability to remove soluble and insoluble organic matter and heavy metals better than alum sulfate. This is especially significant in the production of high-quality water.

Coarse filtration:  Water passes through the material layer in turn filter gravel water, filter sand. The use of these layers of filter materials is to reduce iron, reduce the contamination of organic compounds in water, and remove heavy metals such as copper, zinc, chromium, nickel and radioactive substances, etc. about 90% oil content, safe for use in water supply, production and processing of frozen seafood. The good filtering capacity of this device is applied to reduce the load and protect the filter matrix of the rear 5 – 10 micron filter elements.

Fine filtration:  The water after being softened goes into the fine filtration device with  5 – 10 micron filter elements made of polypropylene fiber with a large filter matrix. This device retains all residual and suspended particles in the water larger than 5 -10 microns in size. After the time of use, the filters are removed and reactivated with dilute HCl acid solution. The filtered water has reached the physicochemical criteria.