Gravity settling device used for solid-liquid separation

A technology of gravity settling and settling tank, applied in settling tank, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of limited processing capacity, low separation efficiency, unsuitable for large-scale and long-term application, etc.

Active Publication Date: 2016-07-27
金锣水务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these approaches have problems such as low separation efficiency, limited processing capacity, and unsuitability for large-scale and long-term applications.

Method used

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  • Gravity settling device used for solid-liquid separation
  • Gravity settling device used for solid-liquid separation
  • Gravity settling device used for solid-liquid separation

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Embodiment Construction

[0066] Some embodiments of the present invention will be further introduced below in conjunction with the accompanying drawings, but it is not intended to limit the protection scope of the present invention.

[0067] figure 2 It is a structural schematic diagram of an embodiment of a gravity settling device according to the present invention, which is a vertical flow type settling tank (or secondary settling tank) usually used for solid-liquid separation of aerated mixed liquid in sewage biological treatment. Wherein the height h1 of the clarification zone, the height h2 of the fast settling zone and the height h3 of the wash-out zone are determined by the first mixed solution inlet (11) at the upper end of the water inlet pipe (1) and the second mixed solution inlet (11) at the lower end of the water inlet pipe (1). 12) is determined, and the ratio of h1, h2 and h3 is 2:4:1. The mixed liquid feed (2) enters the settling tank through the water inlet pipe (1) respectively fro...

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Abstract

The invention relates to a gravity settling device. The device comprises a settling pool, and a supernatant outlet, a first mixed solution inlet, a second mixed solution inlet and a concentrated mixed solution outlet which are successively arranged in the settling pool from top to bottom, wherein a rapid settling area arranged between the first mixed solution inlet and the second mixed solution inlet is not provided with a mixed solution inlet; meanwhile, the height of the rapid settling area accounts for 30% to 90% of the total height of a clarifying area, the rapid settling area and a washout area. The invention also relates to a sludge biological treatment device and a method using the gravity settling device. The gravity settling device provided by the invention has the following advantages: solid-liquid separation ability and efficiency are significantly improved; separation effect can be maintained; meanwhile, the yield of a supernatant is increased, or a desired yield of the supernatant is maintained during treatment of a mixed solution with an increased particle concentration.

Description

technical field [0001] The invention relates to a gravity settling device and method for solid-liquid separation, in particular to a gravity settling device and method for sludge-water separation in sewage biological treatment. The invention also relates to a sewage biological treatment device and method using the gravity settling device and method. Background technique [0002] Gravity sedimentation method is a process of using the settleability of suspended particles in the liquid medium (that is, the density of suspended particles is greater than the density of the liquid medium) to produce a sinking effect under the action of gravity to achieve solid-liquid separation. Gravity settling is widely used in various occasions that require solid-liquid separation. In sewage biological treatment, gravity sedimentation is often used in: grit chamber, to remove inorganic easy sedimentation in sewage; primary sedimentation tank, to remove suspended organic matter in a more econom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52B01D21/02
Inventor 李进民周连奎李大勇
Owner 金锣水务有限公司
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