Title:
エアリフト装置
Document Type and Number:
Japanese Patent JP6667905
Kind Code:
B2
Abstract:
To improve recovery efficiency of an object to be recovered.SOLUTION: An air lift device 1 comprises: a riser tube 2; an aeration portion 3; an air supply portion supplying compressed air 5; a flange portion 6 provided at an outer periphery of a lower end side opening 2a of the riser tube 2; a separator connected to an upper end side opening of the riser tube 2; and a recovery portion recovering an object to be recovered. In the aeration portion 3, air injecting pipes 15 with a posture along a radial direction from an axial center position of the riser tube 2 are attached to a plurality of positions in a circumferential direction of a peripheral wall of the riser tube 2. Passages 17a, 17b corresponding to the upper limit value of a set particle size range of the object to be recovered are included between air injecting pipes 15 adjacent to a center portion of the riser tube 2 in a circumferential direction. When the air lift device 1 is used, water flow toward the lower end side opening 2a of the riser tube 2 is formed in a gap 23 between a water bottom 13 and the flange portion 6, and the object to be recovered 11 is sucked from the lower end side opening 2a into the riser tube 2 together with the water flow.SELECTED DRAWING: Figure 2
Inventors:
Narizawa Michinori
Application Number:
JP2017248042A
Publication Date:
March 18, 2020
Filing Date:
December 25, 2017
Export Citation:
Assignee:
Win Business Development Co., Ltd.
International Classes:
E02F3/88; C02F11/00; F04F5/24
Domestic Patent References:
| JP54018202B2 | ||||
| JP45033942B1 | ||||
| JP54030099U | ||||
| JP2017133249A |
Foreign References:
| US4322897 |
Attorney, Agent or Firm:
Tomoko Tsujida