US 12,344,543 B2
Sewage treatment apparatus suitable for single-family domestic sewage treatment
Wenyun Liao, Changsha (CN); Mingjie Jiang, Changsha (CN); Yuting Lei, Changsha (CN); Lijuan Yi, Changsha (CN); and Xingyang Liu, Changsha (CN)
Assigned to Hunan Wisdom Water Environmental Engineering Co., LTD., Hunan (CN)
Appl. No. 17/418,655
Filed by HUNAN WISDOM WATER ENVIRONMENTAL ENGINEERING CO., LTD., Changsha (CN)
PCT Filed Dec. 23, 2019, PCT No. PCT/CN2019/127391
§ 371(c)(1), (2) Date Jun. 25, 2021,
PCT Pub. No. WO2020/135322, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 201811594402.3 (CN), filed on Dec. 25, 2018.
Prior Publication US 2022/0064040 A1, Mar. 3, 2022
Int. Cl. B01D 21/00 (2006.01); B01D 21/24 (2006.01); C02F 1/00 (2023.01); C02F 3/30 (2023.01); C02F 9/00 (2023.01); C02F 1/28 (2023.01); C02F 1/32 (2023.01); C02F 1/50 (2023.01); C02F 1/78 (2023.01); C02F 101/10 (2006.01); C02F 101/16 (2006.01); C02F 101/34 (2006.01)
CPC C02F 9/00 (2013.01) [B01D 21/0012 (2013.01); B01D 21/0042 (2013.01); B01D 21/0045 (2013.01); B01D 21/2416 (2013.01); B01D 21/2444 (2013.01); C02F 1/001 (2013.01); C02F 2001/007 (2013.01); C02F 1/28 (2013.01); C02F 1/32 (2013.01); C02F 1/50 (2013.01); C02F 1/78 (2013.01); C02F 3/30 (2013.01); C02F 2101/101 (2013.01); C02F 2101/16 (2013.01); C02F 2101/34 (2013.01); C02F 2203/006 (2013.01); C02F 2303/02 (2013.01); C02F 2303/04 (2013.01); C02F 2303/16 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A sewage treatment apparatus suitable for single-household domestic sewage treatment, the sewage treatment apparatus being used for integrated treatment of domestic sewage discharged by a single residence, and
comprising:
a pneumatic lifting apparatus for lifting domestic sewage;
an external box body, wherein the external box body is internally provided with a screen zone,
an anaerobic and anoxic zone, an aerobic zone, a settling zone, an advanced treatment zone and a disinfection and sterilization zone communicating in sequence, the screen zone communicates with a household septic-tank through the pneumatic lifting apparatus, the aerobic zone communicates with the anaerobic and anoxic zone to reflux a part of mixed liquid to an anaerobic zone of the anaerobic and anoxic zone, and the settling zone communicates with the anaerobic and anoxic zone to reflux a part of active sludge to an anoxic zone of the anaerobic and anoxic zone; and
an apparatus zone arranged independently and separately, wherein the apparatus zone is internally provided with an air compressor for providing a conveying pressure;
the advanced treatment zone is provided with a water advanced treatment apparatus, wherein the water advanced treatment apparatus comprises a box body, an upper portion of the box body is provided with a water inlet and a water outlet; and the box body is internally provided with a vertical flow settling assembly for guiding a fluid vertically introduced from the water inlet and outputting the fluid in an ejecting manner by way of inclined wall reflection and an inclined tube settling assembly arranged in an output position of the vertical flow settling assembly and used for settling the fluid output by the vertical flow settling assembly in an inclined settling manner;
the vertical flow settling assembly comprises a center barrel and a rebounding piece connected with each other; the water flow is introduced into an upper portion of the center barrel and the rebounding piece is arranged at a lower end of the center barrel and is located below the inclined tube settling assembly; and the rebounding piece is provided with at least one bevel located in a water flow falling direction; wherein the vertical flow settling assembly is configured to allow a sewage to pass through the center barrel and captured at an inclined wall of the inclined tube settling assembly via an inclined surface of the rebounding piece after a freely falling body motion, to achieve a preliminary sludge and sewage separation;
the inclined tube settling assembly comprises at least two supporting pipes and a plurality of inclined tubes arranged in parallel; and the at least two supporting pipes are in fastening connection with an inner wall of the box body, and the plurality of inclined tubes are positioned in the box body through the at least two supporting pipes; and
a water inlet at a lower end of the inclined tube is provided with a partition plate for dividing the water inlet into an upper flow port and a lower flow port, the water inlet at the lower end of the inclined tube is further provided with a lower guide plate for guiding the water flow to flow into the inclined tube from the upper flow port, and an upper end of the partition plate is provided with an upper guide plate for guiding separated silt to flow out from the lower flow port, such that the water flow entering the inclined tube flows separated from the settled silt flowing out of the inclined tube to prevent the ascending water flow from bringing the settled silt to the water outlet in the upper end of the inclined tube again.