The reverse osmosis device is mainly composed of a high pressure pump, a reverse osmosis membrane and control part. High pressure pump for water pressure, water molecules can be through the RO membrane, water and other substances ( minerals, organic matter, microbe ) almost always rejected in the film, not through the RO membranes by high concentrated water.

Reverse osmosis technology characteristics:

The reverse osmosis desalination rate high, a single membrane desalination rate up to 99%, single stage reverse osmosis desalination rate general system can be stabilized at 90%, two-stage reverse osmosis desalination rate general system can be stabilized at 98%.

As a result of reverse osmosis can effectively remove bacteria and other microorganisms, organic matter, and the metal elements and other inorganic substances, water quality is greatly better than other methods.

The reverse osmosis water running cost and artificial cost, reduce environmental pollution.

The slowed down due to the source water quality fluctuation caused by the change of water quality, so as to facilitate the production of the stability of water quality, the water quality stabilizing a positive role.

It can greatly reduce the burden of follow-up processing equipment, thereby prolonging the service life of the follow-up processing equipment

Activated carbon adsorption

Activated carbon for removing chlorine

Raw water by coagulation, sedimentation, clarification, filtration, can be used as industrial water use. If used for drinking water, but also must be disinfected, to prevent the spread of disease. Usually in water by passing chlorine gas as kill bacteria disinfection method. Chlorine gas into the water, easily soluble in water, producing the following reaction

= = = = = = = = = = = = = = = = = = = HC1+HOC1 C12+H2O

Hypochlorous acid will further ionization, generation hypochlorite

= = = = = = = = = = = = H++OC1 - HOC1

Chlorine in water to generate HOC1 and OC1 - on the bacteria and other microorganisms has strong killing effect. But in the biocidal effect, due to a variety of organic compounds dissolved in the water and other impurities, the impurities are first reacted with C12, C12 consumption to dissolve into the water, only to meet the chlorine consumption needs, there will be extra C12 to kill bacteria, this part is called the residual chlorine. In order to maintain the bactericidal effect, the pipe network water always to maintain residual chlorine in 0.5-1mg / L, at the end of the pipe network is to maintain the 0.05-0.1mg / L chlorine.

When applying the sterilized water for boiler feed water, to remove residual chlorine in tap water. Because of the presence of residual chlorine will destroy the ion exchange resin structure, its intensity variation, easily broken. Especially in the near vicinity of residual chlorine in water when the water plant, the higher, more attention should be paid in addition to chlorine.

Principle

Activated carbon made from charcoal, shell, stone, asphalt carbon and animal bones by calcination and activation. Activated carbon has many pores are communicated with each other, therefore, very great specific surface area. According to the test, 1 grams of activated carbon with 500-1000m2 surface area, the graph 2-23 is activated carbon pore distributions within the Department of. Filtering using activated carbon is a granular, particle size for general 1-4mm. These micropores can adsorption.

Activated carbon chlorine removal is not entirely due to physical adsorption, it also has a catalytic role, the chlorine further into carbon compounds, the reaction mechanism for the

= = = = = = = = = = = = = = = = = = = HC1+HOCl C12+H2O

HOCl = = = = = = = = = = = = = = = = = HCl + [ O] ( activated carbon )

C + [ O] = = = = = = = = = = = = = = = = = = = CO #

C+2 [ O] = = = = = = = = = = = = = = = = = = = CO2 #

Therefore, activated carbon adsorption in the dechlorinating process there is no adsorption saturation, only small amounts of carbon loss. So active carbon dechlorination can run for a long time. For example, 19.6m3 activated carbon granules as filter media, processing of residual chlorine concentration is 4mg / L tap water, even continued treatment of 2650000 m3, so that the rest of the chlorine content of less than 0.01mg / L. Under the same conditions, treatment of residual chlorine concentration is 2mg / L tap water, can be used for 6 years.

Activated carbon chlorine removing device used in pressure filter. In the filter by granular activated carbon as filter media, other function and the pressure filter similarity.

Activated carbon for removing organic matter

Principle

Activated carbon adsorption capacity and the water temperature, water quality is good or bad, have a certain relationship. The higher the temperature, activated carbon adsorption capacity will be strong; if the temperature reaches more than 30 DEG C, the adsorption capacity of the limit is reached, and gradually reduce the possible. When the water is acidic, activated carbon adsorption to anionic material ability is relatively weaker; when the water is alkaline, activated carbon adsorption of cationic substance diminished capacity. Therefore, the water quality of the PH instability, also will affect the activated carbon adsorption capacity.

Activated carbon adsorption principle is: in the particle surface to form a layer of balance of the surface concentration, the organic matter impurity adsorption onto activated carbon particles, the use of initial adsorption effect is very high. But for a long time, activated carbon adsorption capacity of different degree is abate, adsorption effect drops. If the aquarium water turbidity, high concentration of organic compounds, activated carbon will soon lose filtering function. Therefore, should be regularly cleaned or replaced with activated carbon.

Activated carbon particle size on adsorption capacity also have effect. In general, activated carbon particles smaller, larger filtration area. Therefore, powdered activated carbon adsorption effect of total area of the biggest, best, but the powdered activated carbon easily with the water inflow in the aquarium, it is difficult to control, rarely used. Granular activated carbon for particle formation is not easy to flow, organic matter in water and other impurities in the active carbon filtering layer is not easy to block, its adsorption ability, carry convenient replacement.

Activated carbon adsorption ability and contact with water is proportional to the time, exposure time is longer, the filtered water is better. Note: the filtration of the water should be slowly filtering layer. The new activated carbon before first use should be washed clean, otherwise black water outflow. Activated carbon loaded into the front of the filter in, should be in the bottom and the top overlay 2 ~ 3 cm thick sponge, rats is prevented by algae and other large particles penetrate, activated carbon used for 2 to 3 months later, if the filtering effect decline should be changed to a new active carbon sponge layer, also should change regularly.