In recent years, domestic enterprises have also actively explored the technology of "zero emission". Low energy consumption, simple maintenance and long service life have become the goals pursued by designers. Flexible and easy to maintain; at the same time, it can reduce the pump head and reduce energy consumption. The process also has anti-fouling design, suitable for centralized water treatment, has good heat transfer efficiency, reduce costs. In China, the coal chemical industry mainly distributes in the north and northwest. Coal chemical enterprises use a large amount of water and produce a large number of toxic pollutants. Water resources in these areas, the shortage of water resources, reception capacity is low. Zero discharge technology has become a trend for industrial wastewater treatment. Several problems exist in the application of caving technology in coal chemical industry.On the technical level, the life of pretreatment phase film is shorter.On the economic level, the investment in the early stage is larger; on the environmental side, the waste residue needs to be properly treated.The state should also formulate corresponding incentive and guidance policies, determine pilot projects, popularize good technology, and provide guarantee for zero discharge of coal chemical wastewater.
The technology of zero discharge of industrial wastewater in China is still in its infancy, and some problems have arisen in the application process. Enterprises and governments should promote the sustainable development of recycling in order to protect the environment and economic development, popularize and apply the technology of zero discharge so as to realize energy saving, emission reduction and low impact development. The method is basically the same as that of the water treatment plant. The raw water treatment with high chroma, high COD and BOD has good effect.
Polyferric sulfate is a viscous liquid or solid that dissolves and produces a variety of polymeric ions, which are fast, hydrolytic, charged, bridged, coagulated, precipitated and adsorbed, making water fast, especially industrial and domestic wastewater treatment particularly effective. Compared with polyaluminium chloride, aluminum ions are less, because aluminum ions have effects on animal brains. Polyferric sulfate (PFS) has gradually replaced polyaluminium chloride (PAC) as a new type of non-polluted water coagulant and has been widely used. It is a recommended waste water treatment agent and can be made from industrial wastes. PFS is suitable for the purification of any municipal wastewater, especially water quality, low temperature and low turbidity. The turbidity is 95%~98%..
In industrial wastewater treatment, oilfield water injection, oil refining, oily wastewater, pharmaceutical, papermaking, metallurgy, leather and sewage treatment industries, not only can remove suspended particles in water, but also can remove color, COD, water and oil content. Aluminum (PAC), activated alumina, polyacrylamide (PAM), aluminum sulfate, basic aluminum chloride, ferrous sulfate, polyaluminium chloride, iron, sodium hypochlorite, polyferric sulfate (polyferric), sodium hydroxide. Water purification activated carbon series: powdered activated carbon, clean gas activated carbon, coconut shell activated carbon, fruit shell activated carbon, amorphous granular activated carbon, coal Column Activated Carbon. Water Purification Filter Media Series: Silicon Carbide, Quartz Sand Filter Media, Shell Filter Media, Maifanshi Filter Media, Anthracite Road: Liaoning, Deoxidant Sponge Iron Filter Media, Magnetite, Manganese Sand Filter Media, Zeolite Filter Media, Filter Materials, Biofilter Media Volcanic Rock, Pebble (Gravel) Pad, Garnet Filter Media, Shale Ceramic Filter Media, Biological Ceramic, Clay Ceramsite, rare earth porcelain sand filter material, foam bead filter material, coke filter material, pebble.