Method for removing oxidation ditch scum
A technology for oxidation ditch and scum, which is applied in separation methods, grease/oily substance/floating matter removal devices, liquid separation, etc., can solve the problem of unsuitable scum removal in oxidation ditch, lack of pertinence, and poor scum removal effect and other problems, to achieve smooth and stable slag removal work, improve slag removal efficiency, and save labor
Inactive Publication Date: 2015-04-01
CHONGQING THREE GORGES WATER CO LTD
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Problems solved by technology
The device adopts the method of overturning and drainage to remove slag and slag, which is troublesome to use and has poor slag removal effect
[0006] In the prior art, there are still some equipment that use grids to block slag and remove slag, such as a water channel grid-type slag removal equipment disclosed in my country's patent application number 201020022569.5, but these equipment are not specifically for oxidation ditch Designed for the characteristics of scum, not targeted, not suitable for scum removal in oxidation ditch
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[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0032] A method for removing scum in an oxidation ditch, specifically comprising the following steps:
[0033] a. An oxidation ditch slag removal machine with the following structure is installed in the upper ditch of the secondary sedimentation tank. The oxidation ditch slag removal machine is as follows: figure 1 As shown, it includes a frame 1 with a rectangular frame structure as a whole. The frame 1 is installed obliquely in the ditch and the lower part is connected horizontally to form a grid plate 2. The grid plate 2 is provided with a grid 3 for slag blocking; the grid 3 is the vertical grid arranged along the height direction of the frame 1. The upper surface of the grid plate 2 on the frame 1 is also equipped with a scraper 4 correspondingly. The lower part of the scraper 4 is matched with the grid and can be inserted into the gap of the grid. Grab...
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The invention discloses a method for removing oxidation ditch scum, which is characterized in that an oxidation ditch scum fetcher is arranged in an upstream ditch of a secondary settlement tank, a grid is arranged in the oxidation ditch scum fetcher to intercept oxidation ditch scum, a scraper with grapping teeth on the lower part is arranged in the oxidation ditch scum fetcher to grab scum, and a scraper lifting device is arranged in the oxidation ditch scum fetcher to implement reciprocating lifting on the scraper; and meanwhile, a float switch for automatically detecting water level is arranged upstream the oxidation ditch scum fetcher, and is used for controlling a winding motor starting circuit to be on and start working when detecting the rise of the water level and controlling the winding motor starting circuit to be off and stop fetching the scum when detecting the fall of the water level. The method is specially designed for oxidation ditch scum, has the advantages of favorable clearing effect for oxidation ditch scum, high automation degree of equipment and the like, and can implement automatic operation of scum fetching.
Description
technical field [0001] The invention relates to a sewage treatment technology in a sewage treatment plant, in particular to a method for removing scum in an oxidation ditch. Background technique [0002] Pretreatment is the primary link of sewage treatment, and it is also a relatively critical pre-treatment stage. Generally, coarse screens and fine screens are used to block water from sewage plants. Debris, the purpose is to prevent the floating matter from entering the subsequent stage and affecting the treatment effect of the subsequent process. However, the effect of the existing thick and thin grids is not very obvious, and they cannot completely prevent the floating objects larger than 10mm from entering the subsequent treatment system, such as leaves, toilet paper, cigarette filters and other fibrous objects. When these objects enter the core part of sewage treatment - the oxidation ditch, in the biochemical system for 5-7 days, due to the biochemical action of microo...
Claims
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IPC IPC(8): C02F1/40
Inventor 朱俊卢太禄谢强代怡荧刘鹏魏敏华陈贵生李平志陈亮
Owner CHONGQING THREE GORGES WATER CO LTD