Dispersed micro-power rural domestic sewage treatment equipment

Abstract

The utility model discloses distributed micro-power rural domestic sewage treatment equipment which comprises a treatment cylinder which is divided into an anaerobic tank positioned in the center, an anoxic tank positioned in the middle and an aerobic tank positioned on the outer side by partition plates, water passing holes communicated with the anoxic tank are formed in the top of the right side wall and the bottom of the left side wall of the anaerobic tank; a water passing hole communicated with the aerobic tank is formed in the top of the left side wall of the anoxic tank, a sludge backflow hole communicated with the aerobic tank is formed in the bottom of the left side wall of the anoxic tank, and a nitrification liquid backflow hole communicated with the aerobic tank is formed in the bottom of the right side wall of the anoxic tank; a filler layer is arranged in the aerobic tank, a water distribution plate and a gas distributor are respectively arranged on the upper side and the lower side of the filler layer, and a settling zone is formed on the lower side of the gas distributor; the anaerobic tank is connected with a water inlet pipe, and the settling zone is connected with a water outlet pipe. The sewage treatment equipment has the advantages of being good in sewage treatment effect, economical, energy-saving and small in occupied area.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and specifically relates to a decentralized micro-power rural domestic sewage treatment device. Background Art

[0002] Rural domestic sewage treatment is an important part of improving the rural living environment and improving the living standards of rural residents.

[0003] Carrying out rural domestic sewage treatment is an important task to improve the water environment quality in rural areas. Compared with cities, the treatment of rural domestic sewage has the following characteristics: due to the relatively weak economic foundation in rural areas, there is not much money for water pollution control; the supporting infrastructure is poor, there are no corresponding testing facilities and monitoring personnel; the scale of a single sewage treatment facility is small, but the number of facilities is huge, and the operation and supervision are difficult. Therefore, it is imperative to research and develop rural domestic sewage treatment technology and equipment with good treatment effect, strong impact load resistance, economic energy saving, low infrastructure investment and operation costs, simple and easy treatment process, convenient maintenance and management, and can operate normally using local technology and management forces.

[0004] Patent 201410846866.4 discloses a small-scale integrated rural decentralized sewage treatment device, which mainly includes a solar drive and control system, a first anaerobic tank, a second anaerobic filter bed tank, a contact aeration tank, a sedimentation tank, and a disinfection channel. It adopts highly integrated high-tech practical technology and can operate automatically using photovoltaics, but the battery needs to be replaced every 2 to 3 years, and the cost of replacing the battery in the later period is high. Patent 201510183884.3 discloses a rural decentralized sewage treatment method, the facility consists of a regulating tank and an integrated aerobic membrane bioreactor, and adopts continuous water inlet, periodic aeration, and periodic drainage. Patent 201610424762.3 discloses an OMBR integrated sewage treatment and reuse device, including multiple high-efficiency biological purification tanks, buffer tanks, high-efficiency sedimentation tanks, OMBR tanks, backwash tanks, dosing disinfection systems, and circulation tanks. However, in general, these processes involving membrane treatment technology have defects such as high energy consumption, high maintenance costs, and high technical requirements for operators.

[0005] In short, the existing rural sewage treatment equipment has disadvantages such as high energy consumption, high operation and maintenance costs, large land occupation, and limited sewage treatment effect. Utility Model Content

[0006] In order to overcome the deficiencies in the prior art, the purpose of the utility model is to provide a decentralized micro-power rural domestic sewage treatment equipment, which has the advantages of good sewage treatment effect, economic energy saving and small footprint.

[0007] The utility model solves the above problems through the following technical means:

[0008] A decentralized micro-power rural domestic sewage treatment device comprises a treatment cylinder, which is divided into an anaerobic tank in the center, an anoxic tank in the middle and an aerobic tank on the outside by a partition, a water hole connected to the anoxic tank is provided at the top of the right side wall of the anaerobic tank, and a water hole connected to the anoxic tank is also provided at the bottom of the left side wall of the anaerobic tank; a water hole connected to the aerobic tank is provided at the top of the left side wall of the anoxic tank, a sludge return hole connected to the aerobic tank is provided at the bottom of the left side wall of the anoxic tank, and a nitrification liquid return hole connected to the aerobic tank is provided at the bottom of the right side wall of the anoxic tank; a packing layer is provided in the aerobic tank, a water distribution plate and an air distributor are provided on the upper side and the lower side of the packing layer respectively, and a sedimentation area is formed on the lower side of the air distributor; the anaerobic tank is connected to a water inlet pipe, and the sedimentation area is connected to a water outlet pipe.

[0009] Furthermore, a grid is provided at the water hole connecting the top of the anaerobic tank and the anoxic tank.

[0010] Furthermore, a guide plate is provided at the sludge return hole.

[0011] Furthermore, the bottom of the precipitation area forms a gathered arc surface.

[0012] Furthermore, the water outlet of the water outlet pipe is located higher than the filler layer.

[0013] Furthermore, the water distribution plate is a mesh plate structure with mesh holes evenly opened.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The top of the right side wall of the anaerobic tank of the equipment is provided with a water hole connected to the anoxic tank, and the bottom of the left side wall of the anaerobic tank is also provided with a water hole connected to the anoxic tank; the top of the left side wall of the anoxic tank is provided with a water hole connected to the aerobic tank, the bottom of the left side wall of the anoxic tank is provided with a sludge return hole connected to the aerobic tank, and the bottom of the right side wall of the anoxic tank is provided with a nitrification liquid return hole connected to the aerobic tank, so that the automatic return of activated sludge and the internal circulation of nitrification liquid are realized, which greatly improves the sewage treatment effect, and the automatic return of activated sludge and the internal circulation of nitrification liquid do not require additional power, saving energy consumption.

[0016] 2. This equipment concentrates the anaerobic tank, anoxic tank and aerobic tank concentrically together, occupying a small area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of a preferred embodiment of the utility model;

[0019] Figure 2 It is a top view of a preferred embodiment of the utility model.

[0020] In the figure: 1-water inlet pipe, 2-anaerobic tank, 3-anoxic tank, 4-aerobic tank, 5-water distribution plate, 6-aerator, 7-sludge return hole, 8-nitrification liquid return hole, 9-water hole, 10-packing layer, 11-sedimentation area, 12-guide plate, 13-outlet pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0024] like Figure 1 to Figure 2As shown, this embodiment provides a decentralized micro-power rural domestic sewage treatment equipment, including a treatment cylinder, which is divided into an anaerobic tank 2 in the center, an anoxic tank 3 in the middle, and an aerobic tank 4 on the outside by a partition. The top of the right side wall of the anaerobic tank is provided with a water hole 9 connected to the anoxic tank, and a grille is provided at the water hole to prevent impurities from passing freely; the bottom of the left side wall of the anaerobic tank is also provided with a water hole 9 connected to the anoxic tank; the top of the left side wall of the anoxic tank is provided with a water hole 9 connected to the aerobic tank, the bottom of the left side wall of the anoxic tank is provided with a sludge return hole 7 connected to the aerobic tank, and the bottom of the right side wall of the anoxic tank is provided with a nitrification liquid return hole 8 connected to the aerobic tank. The water hole connecting the top of the anaerobic tank and the anoxic tank is arranged on the right side, while the water hole connecting the top of the anoxic tank and the aerobic tank is arranged on the left side. The two are staggered and arranged relative to each other, which can prevent the sewage in the anaerobic tank from directly flowing into the aerobic tank through the water hole on the top.

[0025] A packing layer 10 is provided in the aerobic tank, and a water distribution plate 5 and an air distributor 6 are provided on the upper and lower sides of the packing layer respectively. The water distribution plate is a mesh plate structure with mesh holes evenly opened, and a sedimentation area 11 is formed on the lower side of the air distributor; the anaerobic tank is connected to a water inlet pipe 1, and the sedimentation area is connected to a water outlet pipe 13, and the water outlet position of the water outlet pipe is higher than that of the packing layer.

[0026] The sludge return hole 7 is provided with a guide plate 12 to guide the sludge return. The bottom of the sedimentation area forms a gathering arc surface to gather the settled sludge.

[0027] During operation, domestic sewage flows into the anaerobic tank through the water inlet pipe, enters the anoxic tank from the water hole at the bottom of the tank after anaerobic reaction, and then enters the aerobic tank from the water hole at the top of the anoxic tank. Under the uniform water distribution of the water distribution plate, the sewage passes through the packing layer by gravity, and the activated sludge automatically flows back into the anoxic tank from the sludge return hole at the bottom of the sedimentation area; and the nitrification liquid in the aerobic tank flows back into the anoxic tank from the nitrification liquid return hole, and then flows back into the anaerobic tank from the water hole at the top, thus realizing the automatic return of activated sludge and the internal circulation of nitrification liquid, so as to carry out anaerobic-anoxic-aerobic reactions in turn, thereby effectively improving the sewage treatment effect.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A decentralized micro-power rural domestic sewage treatment equipment, characterized by: The invention comprises a treatment cylinder, which is divided into an anaerobic tank in the center, an anoxic tank in the middle and an aerobic tank on the outside by a partition. A water hole connected to the anoxic tank is provided at the top of the right side wall of the anaerobic tank, and a water hole connected to the anoxic tank is also provided at the bottom of the left side wall of the anaerobic tank; a water hole connected to the aerobic tank is provided at the top of the left side wall of the anoxic tank, a sludge return hole connected to the aerobic tank is provided at the bottom of the left side wall of the anoxic tank, and a nitrification liquid return hole connected to the aerobic tank is provided at the bottom of the right side wall of the anoxic tank; a packing layer is provided in the aerobic tank, a water distribution plate and an air distributor are provided on the upper side and the lower side of the packing layer respectively, and a sedimentation area is formed on the lower side of the air distributor; a water inlet pipe is connected to the anaerobic tank, and a water outlet pipe is connected to the sedimentation area.

2. The decentralized micro-power rural domestic sewage treatment equipment according to claim 1 is characterized by: A grid is arranged at the water hole communicating with the top of the anaerobic tank and the anoxic tank.

3. The decentralized micro-power rural domestic sewage treatment equipment according to claim 2 is characterized by: A guide plate is arranged at the sludge return hole.

4. The decentralized micro-power rural domestic sewage treatment equipment according to claim 3 is characterized by: The bottom of the precipitation area forms a gathered arc surface.

5. The decentralized micro-power rural domestic sewage treatment equipment according to claim 4 is characterized by: The water outlet position of the water outlet pipe is higher than that of the filler layer.

6. The decentralized micro-power rural domestic sewage treatment equipment according to claim 5 is characterized by: The water distribution plate is a mesh plate structure with mesh holes evenly opened.

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