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Drainage air weir system for constant-water-level sedimentation tank and use method of drainage air weir system

An air drainage weir and air weir technology, which is applied in the fields of flocculation/sedimentation water/sewage treatment, sedimentation separation, separation methods, etc., can solve the problems of inapplicability, high construction requirements, and inability to remove scum from the liquid surface, and prevent siphoning. , to avoid the effect of short flow

Inactive Publication Date: 2017-02-22
安徽泓济环境科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional outlet triangular weir has high requirements for construction, and it is prone to problems such as short flow, and the scum on the liquid surface cannot be removed
The conventional decanter is mainly aimed at the sequencing batch activated sludge method with variable water level, and is not suitable for the sedimentation tank with constant water level

Method used

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  • Drainage air weir system for constant-water-level sedimentation tank and use method of drainage air weir system
  • Drainage air weir system for constant-water-level sedimentation tank and use method of drainage air weir system
  • Drainage air weir system for constant-water-level sedimentation tank and use method of drainage air weir system

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Embodiment example 1

[0026] Implementation case one, the use method of the air drainage weir of the present invention, comprises the following steps:

[0027] 1) The constant water level sedimentation tank is filled with purified sewage, and the controlled sewage water level must be higher than the air weir chamber 3 and lower than the central elevation of the main outlet pipe 8;

[0028] 2) When the air weir is discharging water, close the intake valve 5 and open the exhaust valve 6, the air in the air weir chamber 3 is discharged into the atmosphere through the exhaust valve 5 under the action of water pressure, and the water level in the water inlet 1 gradually rises , and flow through the outlet pipe 2, when the water level rises above the central elevation of the outlet pipe 8, it starts to drain, and continues to drain until the set drainage time;

[0029] 3) After the drainage is finished, open the air weir intake valve 5 and close the air weir exhaust valve 3 at the same time, the air begi...

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Abstract

The invention discloses a drainage air weir system for a constant-water-level sedimentation tank and particularly relates to an air weir for a sedimentation tank. The drainage air weir system comprises a water inlet, a water outlet pipe, an air weir air chamber, an air inlet and outlet pipe, an air inlet valve, an air outlet valve, a pressure transmitter, a water outlet main and an air duct. The drainage air weir system control intermittent water outlet of the water tank by means of air pressure change, and opening and closing of an air pipe valve are controlled by an automatic control system, so that drainage and drainage stopping are realized; the air weir adopts an under-liquid-level water outlet manner, is especially suitable for an aeration tank, prevents scum from flowing out with water flow and solves the problems of short flow and the like caused by poor construction of the traditional effluent weir, and an air hose is added to the water outlet main to effectively prevent siphoning.

Description

technical field [0001] The invention relates to a drainage device for a water treatment process, in particular to an air weir for a periodical sedimentation tank. Background technique [0002] Urban or rural sewage treatment is mainly to remove organic pollutants in sewage. Generally speaking, biological treatment is an economical and effective method. Traditional biological treatment mainly includes activated sludge or biofilm. Among them, the biofilm method is mainly only suitable for the treatment of low-concentration sewage, while the activated sludge method is more applicable. Furthermore, the essence of the biological method is to convert the organic matter in the wastewater into biomass, that is, activated sludge, and remove it as residual sludge. [0003] In actual engineering, the separation of mud and water is through secondary sedimentation tanks or membrane separation. However, membrane separation of activated sludge needs to consume a lot of electricity, so m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D21/24C02F1/52C02F3/02
CPCB01D21/2444C02F1/52C02F3/02C02F2209/42Y02W10/10
Inventor 毛勇先李勇朱骏周尚书韩东串梁学颖王磊
Owner 安徽泓济环境科技有限公司
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