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Precipitation tank

A technology of sedimentation tank and tank body is applied in the field of sedimentation tank, which can solve the problem of high cost and achieve the effects of low cost, simple structure and high-efficiency sedimentation and separation treatment.

Inactive Publication Date: 2007-01-17
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the settling tanks of JP 5-45363 and JP 5-200205, the inclined plates are arranged in a relatively large range, so the cost is high.

Method used

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Embodiment Construction

[0017] Next, preferred embodiments of the present invention will be described with reference to FIGS. 1 , 2a and 2b.

[0018] In the settling tank 10 according to the present embodiment, the tank body 11 is circular, and a water supply well 12 is provided at the center thereof. The water supply well 12 has a cylindrical shape with its upper and lower ends open, and its upper end protrudes above the water level in the tank body 1 . At the center bottom of the tank body 1, a concave discharge part 13 for collecting and discharging settled solid components is provided.

[0019] The bottom portion 11 a of the tank body 11 is formed in a conical shape that slopes downward from the lower end of the inner peripheral wall surface 11 b of the tank body 11 toward the center.

[0020] A plurality of inclined plates 14 are provided on the inner peripheral wall surface 11b of the tank body 11 . Each inclined plate 14 has a substantially rectangular flat plate shape, and is fixedly attach...

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PUM

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Abstract

A precipitation tank capable of providing excellent solid matter setting characteristics by a rather simple structure, wherein a raw water is fed into a feed well (12), flows mainly from the bottom face (11a) of a tank body along the inner peripheral wall surface (11b) of the tank body, overflows an overflow weir (15), and is discharged from a clarified water discharge tube (16). While the raw water flows along the inner peripheral wall surface (11b) of the tank body, the water can be efficiently settled since the water flows between tilted plates (14). Deposit flows from the inner peripheral wall surface (11b) along the bottom face (11a) of the tank body, flows into a pit-like discharge part (13), and is discharged from the discharge part to the outside of the tank body (11).

Description

technical field [0001] The present invention relates to a settling tank (sedimentation and separation device) for treating raw water by settling and separating, and more particularly to a settling tank having a structure in which at least a part of the raw water supplied to the central part of the tank rises along the inner peripheral wall surface of the tank And it becomes clarified water, and this clarified water flows out from an overflow part. Background technique [0002] Sedimentation separation devices include natural sedimentation separation devices, inclined sedimentation separation devices, coagulation sedimentation separation devices, etc. The natural sedimentation separation device has rectangular and circular devices. The rectangular device is usually a horizontal flow type, which is called a cross-flow sedimentation tank. The circular sedimentation device has an upflow type and a horizontal flow type. It is used for clarification. Horizontal flow. [0003] Th...

Claims

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Application Information

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IPC IPC(8): B01D21/02B01D21/06B01D21/24B01D21/00
CPCB01D21/2444B01D21/2427B01D21/02B01D21/2405B01D21/06B01D21/0069
Inventor R·戈莱
Owner KURITA WATER INDUSTRIES LTD