Shallow-layer sand filter

• Main Author: TAO XIANJUN
• Format: Patent
• Language: Chinese; English
• Published: 30.04.2014
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The utility model relates to a shallow-layer sand filter which comprises a filtering cylinder body, wherein a water distributor which is connected with a water inlet pipeline is arranged at the upper part inside the filtering cylinder body; a water collecting device communicated with a water outlet tube is arranged at the lower part inside the filtering cylinder body; a filtering material layer is arranged at the upper part of the water collecting device. The shallow-layer sand filter is characterized in that the water collecting device comprises upper and lower layers of mother tube type water collectors, branch tubes of the two layers of water collectors are arranged in a staggered manner and are uniformly distributed along the circumference of the cross section of the cylinder body, and each branch tube is provided with a filtering cap. By adopting the shallow-layer sand filter, not only is automatic backwashing achieved, but also the filtering material layer can be thoroughly washed as the upper and lower