"Saying, food to water first." Pipe straight drinking water system in China once appear, it inevitably caused great attention. Although and foreign high quality water supply in China at present pipe straight drinking water system has a distinct Chinese characteristics, but it is pushing the drinking water commercialization process, and from a side, reflects the development of national economy and the improvement of people's living standard, is also proved the broad masses of the people for the pay more and more attention to health.
A pipe straight drinking water system technology advantage

The so-called straight drinking water pipe, which is a high quality water supply way, in residential areas or public buildings (such as hotels, schools, etc.) with water station, tap water as source water, the depth treatment, processing and purification, in the original water outside the system, then add a independent quality water supply line of high quality water purification the direct input to families and water point for people to drink. And bottles (barrels) compared with water, pipe straight drinking water has the more obvious industrialization feature, it is the inevitable trend of the era development. At present, the traditional water system is facing come from various aspects threat:

1. Whether surface water source or underground water sources, the overall deterioration of the environment, industrial wastewater, sewage discharge the improper influence etc, has presented a deteriorating trend.

2. The traditional "coagulation-precipitation (or clarify)-filtering-chlorine was added disinfection" water treatment process, the water in the solubility organic matter and low molecular material difficult to remove, and some of these substances is had "three addressed to the" characteristics.

3. Remain in water in the "three of organic matter and other trace, the chlorinated, the hazards have trends to increase, and the surplus chlorine led directly to the tap water outlet sensory difficult to live up to expectations. 4. Because the city water supply pipe all have a long history, various impurities and microbial the pipe inner surface adhesion, secondary pollution in probability. In addition, the reservoir, pump station, housetop cistern and secondary network management, etc, but also to tap water quality produces the influence of different level.

For with this, and pipe straight drinking water system in water treatment craft, the adsorption, oxidation, biodegradation and membrane filter etc way, a scientific combination, the depth of the original water to handle, make water full compliance with the drinking water purification knowledge water quality standard of (CJ94-1999). In material selection, equipment using, pipe straight drinking water system by the green environmental protection pipe if no rules copolymerization polypropylene (PP-R) tube, crosslinked polyethylene (PEX) pipe, valve, water tank adopts stainless steel products, fundamentally eliminate the secondary pollution production. In the water in the way, through the use of microcomputer variable frequency constant pressure water supply circulator of equipment, pipeline straight drinking water systems to achieve continuous adjustment, thus further guarantees the safety and reliability of the effluent water.

2 several pipeline straight drinking water treatment technology compared

Table a

Active carbon adsorption technology project membrane separation technology ozone oxidation technology ultraviolet disinfection technology ozone + / biological activated carbon technology technology

The principle of the pore structure and the huge developed the specific surface area, to use membrane absorption function of micro hole in the water for impurity screening. Through the oxidation reaction to change water quality and disinfection, also can remove chromaticity and smell flavor. And the life of the microbial central DNA produce light the reaction, make its death or lose the ability to continue to live and breed. Ozone oxidation disinfection + active carbon adsorption 1 biodegradable 2 physical adsorption

Applicable scope of chroma, the smelling and molecular weight in 500-3000 μ of organic matter and hate water have obvious removal efficiency of organic matter. Wide used as the ozone oxidation (organic and inorganic substances) and ozone disinfection after sterilization,, rich oxygen sterilization, disinfection vast vast

Technical characteristics of 1 small hole is the main adsorption area.

2 be organic matter affect the characteristics: hate water solubility, small, polar weak easily absorbed. 1 water quality and film about pore size;

2 cast less don't even dosing chemicals;

3 cover an area of an area small, easy to realize automatic control. The reaction rate and participate in response of material and ozone concentration and the contact time related. 1 safe, reliable, operation management simple;

2 economic and practical, without harmful product 1 improve and enhance of active carbon adsorption performance;

2 extended the use of activated carbon cycle;

3 operation cost less. 1 enhancement in the water soluble organic removal;

2 extend the effect of the regeneration cycle;

3 effluent water improve, the operating cost is reduced.

Less than one price is higher;

2 to ensure adsorption capacity must be timing regeneration or replace 1 membrane vulnerable to pollution;

2 one-time investment and operating cost is higher. 1 part of the organic matter not easy to oxidation

2 easy cause bacterial breed strength by light source, lamp life influence, unable to achieve sustained sterilization.

Note general and ozone oxidation, biodegradation technology analysis. 1 the pore diameter of membrane according to medium size selection;

2 try to control membrane pollution. Less commonly used in water purification after conventional treatment, commonly known as the post-processing. Not with the chlorination used at the same time

Table 2

Project microfiltration (MF) ultrafiltration (UF) nanofiltration (NF) reverse osmosis (RO)

1 membrane aperture 0.1 u m ~ 2 μ m between 0.001 u m ~ 0.1 u m between 1 nm ~ 0.05 u m < 1 nm

2 0.05 MPa to 0.3 operating pressure MPa 0.04 MPa to 0.4 MPa to 0.5 MPa to 1.0 MPa 1 MPa a 2 MPa

3 scope is as ultrafiltration, reverse osmosis or nanofiltration preprocessing or activated carbon filter post-processing facilities. Macromolecular organic matters, suspended matter, bacteria, viruses and other organisms. Apply to hardness and organic compound high and low turbidity of raw water. Preparation pure water

4 technical characteristics, the equipment is simple, easy to operate, TongShuiLiang big, low working pressure, water making rate is high. And microfiltration can be part of the original water desalination similar and softening, remove, chroma, bacteria, soluble organic matter and some metal ion, etc. Water taste good, is a suitable in drinking water quality in production of the membrane filtration technology. Almost all the water can remove impurities, including all kinds of suspended solids, colloid, soluble organic, inorganic salt, bacteria, microbes and so on.

5 shortage of organic pollutants