A domestic sewage pretreatment device

CN224686458UActive Publication Date: 2026-08-28JINTA COUNTY DIDITONG WATER SUPPLY & DRAINAGE CO LTD
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Patent Information

Application Number
CN202521789941.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-22
Publication Date
2026-08-28
Estimated Expiration
2035-08-22

AI Technical Summary

Technical Problem

[0002]生活污水主要来源于居民日常生活活动（如盥洗、厨卫、洗涤等），其典型污染物包括有机物质（BOD5、COD）、悬浮固体（SS）、营养盐（氮、磷）以及病原微生物（细菌、病毒、寄生虫卵），生活污水的处理流程包括预处理 、沉降降解、脱氮除磷、消毒氧化以及污泥处理，预处理是将生活污水中的大体积漂浮物以及重质不溶杂质进行初步分离处理，目前的预处理设备均需要停机利用人工对沉降池底部定期进行清理，避免淤泥等沉降杂质附着在底部，同时现在的预处理设备的沉降池依赖泵进行排水，排水时不可不免得会吸入底部的沉降物，影响分离效果，且这些物质也会加速消耗泵的磨损及寿命，因此，需要做出一定的改进，已提升预处理效果

Benefits of technology

[0011]本实用新型通过设置虹吸管，可实现池体内的污水分批次排出，期间再次注满污水的过程中，利用进入的污水对底部坡面上的沉积物进行冲刷，实现自清洁的效果，同时也可定期在再次注满污水的过程中通过检修口利用水枪对底部坡面进行冲洗，降低了人工停机维护的周期，同时，虹吸管相较于传统的泵输送，成本低，且结构简单耐用，故障率低，使用寿命更长。

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Abstract

The utility model relates to sewage treatment equipment technical field, concretely is a kind of domestic sewage pretreatment device, including pool body, the pool body one side is fixedly connected with salvage area, the bottom of salvage area is obliquely shaped, the lowest place of the bottom of salvage area is communicated with the pool body, detachably connected with filter plate in the upper portion of salvage area, the salvage area is provided with tooth harrow grating decontamination machine, the pool body one side is fixedly connected with siphon, the pool body bottom is "V" child shape, the pool body bottom is provided with auger, the upper portion of salvage area is provided with sewage inlet pipe, the output end of auger is fixedly connected with sand water discharge pipe, the pool body top is provided with air hole, the utility model is transported by using auger to the impurity deposited in bottom, avoid the problem of manual cleaning pool bottom;By setting siphon instead of pump delivery, avoid the pump suction pool bottom impurity, influence pretreatment effect, also reduce cost.
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Claims

1. A domestic sewage pretreatment device, comprising a tank (1), wherein a retrieval area (2) is fixedly connected to one side of the tank (1), characterized in that: The bottom of the salvage area (2) is inclined. The lowest point of the bottom of the salvage area (2) is connected to the pool body (1). A filter plate (3) is detachably connected to the upper part of the salvage area (2). A toothed rake bar screen cleaner (4) is installed on the salvage area (2). A siphon pipe (5) is fixedly connected to one side of the pool body (1). The bottom of the pool body (1) is V-shaped. An auger (6) is installed at the bottom of the pool body (1). A sewage inlet pipe (7) is installed at the upper part of the salvage area (2). A sand and water discharge pipe (8) is fixedly connected to the output end of the auger (6). A ventilation hole is opened at the top of the pool body (1).

2. The domestic sewage pretreatment device according to claim 1, characterized in that: The bottom of the siphon (5) located inside the pool body (1) is at least 300 mm away from the screw conveyor (6) at a vertical distance.

3. The domestic sewage pretreatment device according to claim 1, characterized in that: A cleaning port (201) is provided on one side of the salvage area (2), and the cleaning port (201) corresponds to the position of the filter plate (3).

4. The domestic sewage pretreatment device according to claim 1, characterized in that: The siphon pipe (5) is equipped with a valve on the side outside the pool body (1).

5. The domestic sewage pretreatment device according to claim 4, characterized in that: A water level gauge is installed on the pool body (1).

6. The domestic sewage pretreatment device according to claim 1, characterized in that: The filter plate (3) has a pore size of not less than 40 mm.