Micro PE candle filter is used to carry out efficient and precise solid-liquid separation and sludge dehydration for chemically treated heavy metal wastewater. The microporous PE tube precision filter has high filtration and separation efficiency and stable effect. The heavy metal wastewater can meet the discharge requirements in one filtration. It can dewater the sludge to a dryness of 30%-40%. It is quick and convenient to operate, has a high degree of mechanization and has a long service life. Long, small footprint and low power consumption.
Among the large amounts of industrial wastewater discharged, heavy metal wastewater accounts for a considerable proportion. Machinery, metallurgy, chemical industry, medicine, mining and other industries all produce wastewater containing zinc, copper, nickel, lead and other heavy metals. Not only can heavy metal elements not be purified naturally under natural conditions, they will also be continuously enriched through the biological chain, posing increasing harm to human health and environmental safety. Therefore, heavy metal wastewater has been regarded as the focus of industrial wastewater treatment at home and abroad. Heavy metal wastewater has three categories: acidic heavy metal ion wastewater, acidic slightly soluble heavy metal salt wastewater, and neutral heavy metal oxide wastewater. Acidic heavy metal ion wastewater contains the largest amount of water, accounting for more than 80%. Wastewater from electroplating, metal processing, metal mining and metallurgy enterprises falls into this category.
There are two major categories of heavy metal wastewater treatment technologies commonly used, namely adsorption methods and chemical methods. Adsorption methods before the 1960s mostly used inorganic adsorbents such as activated carbon and zeolite. In the 1970s, organic ion exchange resins became popular. Due to the unstable indicators and high cost of adsorption methods, after the 1980s, domestic and foreign methods gradually turned to chemical methods. According to reports, among the 13,000 electroplating and metal processing plants in the United States, 75% used chemical methods to treat wastewater in 1986. At present, most domestic enterprises use chemical methods to treat various heavy metal wastewater.
PA Tubular Filter
Chemical methods include neutralization method, carbonate method and vulcanization method. No matter which one, solid-liquid separation after chemical treatment is a key operation. At present, the separation devices used at home and abroad, such as gravity sedimentation, inclined plate, air flotation and other traditional technologies, are difficult to achieve efficient separation. The separated wastewater often requires secondary fine filtration to meet the discharge requirements. The separated solids are solid content. Very low sludge needs to be processed by sludge dewatering devices such as filter press, belt filter press or centrifuge, making the treatment process too complicated.
The treatment of heavy metal wastewater by microporous PA/PE candle filter is a new treatment technology. It directly enters the chemically treated heavy metal wastewater into the microporous PA/PE candle filter for efficient and precise solid-liquid separation. The water quality can meet the discharge requirements at one time. Sludge dewatering is also carried out in microporous PA/PE candle filter, without the need for other dewatering devices. This treatment technology greatly simplifies the chemical treatment process. It is not only stable and reliable in water quality, but also saves investment, is easy to operate, has a small footprint and is low in cost. It has been successfully used in heavy metal wastewater treatment by thousands of domestic manufacturers.
Compared with other solid-liquid separation technologies, microporous PA/PE candle filtration technology has the following main features.
The microporous PA/PE candle filter is an efficient and reliable new technology for treating heavy metal wastewater. It is suitable for all heavy metal wastewater, especially for medium and small-scale wastewater treatment.
