"What a strange thing is this fire hydrant is green?" Recently, three green fire hydrants appeared near the Xi'an North Passenger Station, causing many people's curiosity. Originally, this is a demonstration point for the city's reclaimed water use. These green fire hydrants all use reclaimed water as the source of water supply, and the effluent is mainly used for greening irrigation, urban sprinkling, and fire fighting water.
According to the relevant staff of the Water Supply and Drainage Department of the Municipal Water Affairs Bureau, the reclaimed water refers to the water that can be used for recycling after the sewage has reached a certain water quality index after being properly treated and meets certain requirements for use. In 2013, Xi'an sewage treatment ranked first in the comprehensive assessment of 36 large and medium-sized cities in China for three consecutive quarters, but more than 90% of the reclaimed water can only be discharged into the canal. On the one hand, a large amount of reclaimed water has not been fully utilized. On the other hand, the drinking water supply source in the urban area has basically reached full-load operation, and the peak water supply period will also result in the phenomenon of insufficient pressure on the end pipeline and tight water supply. At the same time, most of the city’s existing landscaping, road sweeping and firefighting water intakes are sources of drinking water.
According to calculations, the city collects 15 million cubic meters of water from fire hydrants each year, which is equivalent to the storage capacity of three Daxie reservoirs, which can be used by 8 million people in Xi’an for drinking for 10 days. In view of this situation, since the second half of last year, the water department has increased the pilot project for the reuse of reclaimed water, and it has already been in the city's first, second, third, second, fourth and seventh sewage treatment projects. The plant built a recycling water utilization project, laid 115km of reclaimed water pipe network, completed 28 reclaimed water intake points, and 15 of them have been put into use, with a water supply capacity of 230 cubic meters per hour.
According to the introduction of responsible officials of the Municipal Water Affairs Bureau, the city will work hard in municipal miscellaneous use, landscaping, water use in ecological landscapes, industrial water use, etc., and strive to use 3 to 5 years for the utilization rate of recycled water in the city to reach 30%. Utilization reaches 100 million cubic meters. These green fire hydrants, which will be “up to posts†in the near future, will open a new chapter in the use of recycled water in our city.
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1. Product introduction
Quartz stone or silica, is a kind of silicate minerals that has hard texture, abrasion resistance, stable chemical properties` characters. Quartz Sand is crushing by quartz stone;it is white, colorless or translucent, the intrinsic molecular chain structure. Quartz sand is crystal shape and variation lattice, which has high temperature resistance, the small thermal expansion coefficient, high insulation, corrosion resistance, piezoelectric effect, resonant effects and its unique optical properties.
2. Application of quartz sand
Quartz sand is an important industrial mineral raw material, non hazardous chemicals,It is widely used in glass, casting, ceramics and refractories, smelting ferrosilicon, metallurgical flux, metallurgy, construction, chemical, plastic, rubber, abrasive and other industries; specific application performance for motor and train transportation:
a. Glass: flat glass, float glass, glass products (glass cans, glass bottles, glass tubes, etc.), optical glass, glass fiber, glass instruments, conductive glass, glass cloth and anti radiation special glass and other main raw materials
b. Ceramic and refractory materials: embryo material and porcelain glaze, kiln with high silica brick, ordinary raw materials such as Silicon Carbide and carborundum.
c. Metallurgy: silicon metal, ferrosilicon alloy and silicon aluminum alloy and other raw materials or additives, flux.
d. Building: concrete, cementitious materials, road construction materials, artificial marble, cement physical properties testing materials ( cement standard sand) etc..
e. Chemical: as silicon compounds and water, glass and other raw materials; sulfuric acid tower filler, amorphous silica powder.
f. Machinery:the main raw material of machinery casting sand, grinding materials (sand, hard abrasive paper, sandpaper, emery cloth, etc.).
g. Electronic: high purity metal silicon, communication fiber etc..
h. Rubber, plastic: filler (to improve wear resistance)
I. Coating: filler (to improve the acid resistance of coating)
j. Aviation, space: the internal structure of molecular chain, crystal shape and variation lattice, which has high temperature resistance, the small thermal expansion coefficient, high insulation, corrosion resistance, piezoelectric effect, resonant effects and its unique optical properties.
3. Specifications of quartz sand:
Quartz sand filter:0.5-1 1-2 2-4 3-5 5-8 8-16 16-32mm 36 46 60 100 120.
Abrasives: 0.25-0.5 6-10mm 24 30 36 46 60 80 100 120 0.5-1 1-2 2-4 4-6 150200.
Quartz sand for floor brick: 60-80 80-120.
4. Transportation and Packing
Woven bag, lined with plastic film bags, each 25kg can also be packaged according to customer demand. The product should be placed in a cool and dry place during storage; When transportation, it prevents to mixed with hard materials, to affecting the quality of packaging, to prevent breakage. To avoid leakage or mixed with debris; to avoid water, oil and fire.
Quartz Sand
Quartz Sand,Silica Sand,White Silica Sand,Fine Silica Sand
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