公开(公告)号：US5843308A

公开(公告)日：1998-12-01

申请号：US744024

申请日：1996-11-05

Applicant: James F. Suozzo ,  Kathleen A.. Suozzo

Inventor： James F. Suozzo ,  Kathleen A.. Suozzo

IPC: B01D24/30 ,  B01D35/12 ,  C02F9/00

CPC classification number: B01D35/12 ,  B01D24/30 ,  B01D2201/18

Abstract: The present invention is a dual-stage, gravity continuously-backwashed filtering system for filtering contaminants from wastewater. This filtering system has a first sand-filter unit that is loaded with wastewater influent. The filtering sytem has injection points for coagulation chemicals and disinfection chemicals. The first sand-filter unit is connected in series to a second sand-filter unit of similar design. The first sand-filter unit is made up of large-grained sand, the second sand-filter unit fine-grained sand. The second sand-filter unit receives its influent from the effluent weir of the first sand-filter unit. The reject water from the second filter unit is re-introduced into the influent that is fed to the first filter unit. The reject matter from the first filter unit is passed to waste.

Abstract translation: 本发明是一种用于过滤废水污染物的双级重力连续回洗过滤系统。 该过滤系统具有装有废水流入物的第一个砂滤器单元。 过滤系统具有凝结化学品和消毒化学品的注射点。 第一砂滤器单元与类似设计的第二砂滤器单元串联连接。 第一个砂滤单元由大粒砂，第二砂滤单元细砂组成。 第二砂滤器单元从第一砂滤器单元的流出堰接收其流入物。 将来自第二过滤器单元的排出水再次引入到被供给到第一过滤单元的流入物中。 来自第一过滤器单元的废品被传递到废物。