Small unpowered internal reflux three-phase separation structure for rural domestic sewage treatment

Abstract

The utility model discloses a small rural domestic sewage treatment unpowered internal reflux three-phase separation structure which comprises a box body, a contact oxidation reaction tank and a biological sedimentation tank are arranged in the box body, and a shared partition plate is arranged between the contact oxidation reaction tank and the biological sedimentation tank. A gap for water flow to pass through is formed between the bottom end of the partition plate and the tank bottom, an inclined three-phase separation plate is arranged at the lower end of the partition plate, the bottom end of the three-phase separation plate inclines towards the biological sedimentation tank, and a sludge inclined plate is arranged on one side, far away from the contact oxidation reaction tank, of the bottom of the biological sedimentation tank; the bottom end of the sludge inclined plate extends to the position close to the lower portion of the three-phase separation plate, and a gap for water and sludge to flow is formed between the sludge inclined plate and the three-phase separation plate. And unpowered sludge backflow of the contact oxidation reaction tank and the sedimentation tank can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to rural domestic sewage treatment technical field, concretely is a small -size rural domestic sewage treatment no -power internal reflux three -phase separation structure. BACKGROUND

[0002] Continuously improving rural living environment is an important task of implementing rural revitalization strategy, and is related to the fundamental well-being of the broad masses of peasants, and the rural domestic sewage treatment is promoted according to local conditions, and efforts are made to solve rural sewage constant flow, water body black and odorous and other problems, which is one of the important tasks of rural living environment management.

[0003] Due to the scattered residence of villagers in rural areas, the construction of centralized treatment facilities has the problems of difficult domestic sewage collection and large capital investment.Meanwhile, according to the operation condition of the domestic sewage treatment facilities that have been constructed, the operation and maintenance management of the sewage treatment facilities is difficult, and there is a lack of professional technical personnel and management personnel, the operation and maintenance of the facilities are difficult to guarantee, and due to the low degree of automation, manual operation and management are required for part of the small facilities, which increases the difficulty of operation and management.

[0004] And the integrated equipment for individual households on the market (without the construction of collection pipe network) still has the problems of large size and high operation cost. The various treatment tanks are connected in turn, the water treated in the aerobic tank enters the sedimentation tank, and the sludge in the sedimentation tank is returned to the aerobic tank through the gas lifting device or sludge pump, so that the equipment needs to be provided with electric energy, and the operation cost makes the individual households unable to bear. Ultimately, the actual application rate is not high. SUMMARY

[0005] In order to solve the above technical problems, the utility model discloses a small -size rural domestic sewage treatment no -power internal reflux three -phase separation structure, can realize the sludge no -power reflux of contact oxidation reaction tank and sedimentation tank.

[0006] In order to achieve the above object, the utility model discloses a small -size rural domestic sewage treatment no -power internal reflux three -phase separation structure, including the box, setting up in the box has contact oxidation reaction tank and biological sedimentation tank, the contact oxidation reaction tank and biological sedimentation tank between setting up the shared baffle, the baffle bottom end and the pool bottom between the gap that water flows, in the baffle lower end setting up the inclined three -phase separation board, the bottom end of three -phase separation board is inclined to biological sedimentation tank, the bottom of biological sedimentation tank is set up sludge inclined plate away from contact oxidation reaction tank side, the bottom end of sludge inclined plate extends to the position close to three -phase separation board below, and the sludge inclined plate and three -phase separation board between the gap that water and sludge flow.

[0007] In the above scheme: a long-haired fiber filter is installed on the upper part of one side of the biological sedimentation tank. The bottom of the long-haired fiber filter is connected to the biological sedimentation tank, and the drain outlet is connected to the effluent side of the long-haired fiber filter. Long-haired fiber filter cloth is installed inside the long-haired fiber filter. In the effluent outlet area, in order to reduce the concentration of suspended solids in the effluent, a long-haired fiber filter cloth is added to the effluent outlet area. This can simultaneously intercept suspended solids in the effluent, and a certain amount of microorganisms are attached to the fibers, which can further remove organic matter in the wastewater, thus further ensuring the quality of the effluent.

[0008] In the above scheme: the contact oxidation reaction tank is equipped with an aeration device and a suspended MBBR biological packing material.

[0009] Beneficial effects:

[0010] In this invention, after the sludge and wastewater mixture in the contact oxidation reactor passes through this area, the air in the contact oxidation reactor returns to the contact oxidation reactor under the action of the three-phase separation plate. The sludge-water mixture enters the biological sedimentation tank. Due to the small volume of the biological sedimentation tank, a sludge inclined plate is set on one side opposite the three-phase separation plate. Under the action of the sludge inclined plate, the sludge flows back to the contact oxidation reactor by gravity, without any power required for sludge return. The scum is intercepted by the three-phase separation plate, and the supernatant flows out. Through the combination of the above devices, the separation of air, sludge, and water can be achieved, ensuring that the effluent consistently meets standards. In other words, this structure not only allows water to enter the biological sedimentation tank but also allows sludge to flow back to the contact oxidation reactor along the sludge inclined plate. At the same time, the three-phase separation plate intercepts air, preventing air from entering the sedimentation tank and reducing the aeration volume. Attached Figure Description

[0011] Figure 1 A top view of a small-scale, micro-powered integrated treatment equipment for rural domestic sewage.

[0012] Figure 2 This is a cross-sectional view of the lower layer of a small-scale integrated micro-power treatment equipment for rural domestic sewage.

[0013] Figure 3 for Figure 1 AA cross-section view.

[0014] Figure 4 for Figure 1 BB cross-section.

[0015] Figure 5 for Figure 1 CC cross-section view. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] In this utility model, directional terms such as up, down, left, right, front, and back represent relative positions in the diagram and do not indicate the absolute position of the product.

[0018] Example 1

[0019] like Figures 1-5 As shown, the proposed design for a small-scale integrated micro-powered rural domestic sewage treatment equipment includes a housing 1. The height of housing 1 is 1.5-2.5m, and its length and width are designed according to the treatment capacity. Generally, a single treatment unit can handle about one ton per day, so a length of about 1m and a width of 70cm is sufficient. Of course, the above dimensions are just an example and can be adjusted according to the treatment capacity in actual applications. Housing 1 can be made of stainless steel or plastic. The housing 1 is divided into upper and lower layers by horizontal partitions. The lower layer is an anaerobic tank 2 with a depth of 0.8-1.5m, and the upper layer has a depth of 0.7-1m. An anaerobic tank inlet well 3, connected to the anaerobic tank 2, is located on one side of the upper layer. In the figure, the anaerobic tank inlet well 3 is located on the right rear side. An inlet manual screen frame 10 is installed along the side of the anaerobic tank inlet well 3, located at the rear of the anaerobic tank inlet well 3 in the figure. A water inlet 8 is provided at the position corresponding to the water inlet manual bar frame 10. The water inlet manual bar frame 10 is a basket-type bar, which is convenient for cleaning debris.

[0020] On the side opposite to the anaerobic tank inlet well 3, there is an anaerobic tank outlet well 4 connected to the anaerobic tank 2, located at the left front corner of the figure. A vertical guide plate 201 is installed in the middle of the anaerobic tank 2, with a gap between the bottom of the vertical guide plate 201 and the bottom of the anaerobic tank 2 to allow water to pass through. The vertical guide plate 201 divides the anaerobic tank into two tanks, and water passes through the bottom of the vertical guide plate to prevent short-circuiting of wastewater from affecting the reaction effect.

[0021] The upper layer of the box 1 is provided with a hydrolytic acidification biological filter bed pool 5, a contact oxidation reaction pool 6 and a biological sedimentation pool 7, wherein the hydrolytic acidification biological filter bed pool 5 is communicated with the top of the anaerobic pool water inlet well 3, the bottom of the hydrolytic acidification biological filter bed pool 5 is provided with a water passing hole 501 and is connected with the contact oxidation reaction pool 6, the hydrolytic acidification biological filter bed pool 5 is filled with ceramic filler, the bottom of the contact oxidation reaction pool 6 is provided with an aeration device 13 and suspended MBBR biological filler (not shown in the figure), the aeration device 13 is arranged at the bottom of the box, the MBBR suspended filler is suspended in water, the water inlet and outlet of the contact oxidation reaction pool is arranged at the opposite corner of the bottom of the pool body, the contact oxidation reaction pool 6 is communicated with the biological sedimentation pool 7, and the biological sedimentation pool 7 is provided with a water outlet 9. Specifically, the anaerobic pool water outlet well 4 and the hydrolytic acidification biological filter bed pool 5 are arranged side by side on the same side of the box 1, that is, the left side in the figure. The top end of the partition plate between the anaerobic pool water outlet well 4 and the hydrolytic acidification biological filter bed pool 5 and the top plate of the box have a gap for water to flow into the hydrolytic acidification biological filter bed pool 5. The anaerobic pool water inlet well 3 and the biological sedimentation pool 7 are arranged side by side from front to back, and the contact oxidation reaction pool 6 is located in the middle of the upper layer of the box 1. After being arranged in this way, wastewater flows into the left upper corner of the anoxic biological ceramic filter bed from the top of the anaerobic pool, gradually flows through the ceramic filter bed in this area, and then enters the next unit, the contact oxidation reaction pool, from the bottom hole in the right lower corner.

[0022] The micro-nano aeration device 13 is a loop-shaped device surrounded by a micro-nano aeration pipe. The aeration device is connected with an air pump (not shown in the figure) through an air pipe. The air pump is a 12V low-voltage air pump. Since the aeration pressure borne by the contact oxidation reaction pool of the utility model is not large, the device can use a 12V low-voltage air pump for aeration, and good treatment effect can be achieved.

[0023] The air pump can be provided with a micro-power generation module for providing electric energy for the low-voltage air pump and a corresponding voltage conversion device. The micro-power generation module is composed of a solar panel, a wind turbine, a controller, a solar special battery, a support system and a solar special wire. This is prior art. After power generation, the voltage conversion device is used to convert 12V low-voltage for the air pump. This is a conventional setting and is not the invention point of the utility model. Therefore, it will not be described here. Of course, a storage battery can also be used to provide electric energy for the air pump.

[0024] The bottom end of the partition plate connected with the biological sedimentation tank 7 and the bottom of the contact oxidation reaction tank 6 has a gap for water flow, and an inclined three-phase separation plate 11 is arranged at the lower end of the partition plate, the bottom end of the three-phase separation plate 11 is inclined to the biological sedimentation tank 7, the bottom of the biological sedimentation tank 7 is provided with a sludge inclined plate 12 away from the side of the contact oxidation reaction tank 6, the bottom end of the sludge inclined plate 12 extends to a position close to the lower side of the three-phase separation plate 11, and the sludge inclined plate 12 and the three-phase separation plate 11 have a gap for water and sludge flow. A long hair fiber filter tank 14 is arranged at the upper part of one side of the biological sedimentation tank 7, which is located at the right front part in the figure. The bottom of the long hair fiber filter tank 14 is communicated with the biological sedimentation tank 7, the drain outlet 9 is communicated with the water outlet side of the long hair fiber filter tank 14, that is, the upper side of the long hair fiber filter tank 14, and water enters from the lower side and exits from the upper side, achieving the effect of filtration. Long hair fiber filter cloth is arranged in the long hair fiber filter tank 14.

[0025] After the rural domestic sewage is intercepted by the water inlet artificial grid frame, large sundries are blocked, and then the sewage enters the anaerobic tank. Compared with the current flat integrated device, the anaerobic tank can better isolate air and achieve an anaerobic environment. The sewage is fermented in the anaerobic ammonification reaction module, which can convert large molecular organic matter into small molecular organic matter or produce methane, hydrogen and other gases, laying a foundation for subsequent biochemical units. The water in the anaerobic tank flows from the anaerobic tank outlet well, and in the process of turning over from the upper part of the anaerobic tank outlet well, it can contact with air, so that the actual environment in the hydrolysis acidification biological filter bed tank is anoxic. The ceramic filler is placed in the hydrolysis acidification biological filter bed tank. Because there are a large number of pores in the ceramic filler, a large number of growth environments can be provided for microorganisms, and the dual effects of filtration and interception can also be achieved. After the wastewater passes through this unit, the organic matter in the wastewater can be further reduced. The wastewater flows into the left upper corner of the anoxic biological ceramic filter bed from the top of the anaerobic tank, and then flows through the ceramic filter bed in this area, and then enters the next unit, the contact oxidation reaction tank, from the bottom hole of the right lower corner.

[0026] In the contact oxidation reaction tank, air is pumped into the water body by an air pump to maintain a certain concentration of dissolved oxygen in the water body, create a good environment for the survival of aerobic organisms, and purify wastewater by culturing microorganisms in the suspended MBBR biological filler. All organic matter in the wastewater can be degraded into carbon dioxide and water, and finally can achieve standard discharge. Then the water enters the biological sedimentation tank, and after sedimentation in the biological sedimentation tank, if there is still a small amount of sludge, dregs and the like, they can be filtered by the subsequent long hair fiber filter tank to achieve standard discharge. The effluent can reach the first level standard of the "Integrated Wastewater Discharge Standard".

[0027] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small rural domestic sewage treatment unpowered internal reflux three-phase separation structure, comprising a box body, characterized in that: The contact oxidation reaction tank and the biological sedimentation tank are arranged in the box body, a shared partition plate is arranged between the contact oxidation reaction tank and the biological sedimentation tank, a gap for water flow is arranged between the bottom end of the partition plate and the tank bottom, an inclined three-phase separation plate is arranged at the lower end of the partition plate, the bottom end of the three-phase separation plate is inclined to the biological sedimentation tank, a sludge inclined plate is arranged at the bottom of the biological sedimentation tank away from the side of the contact oxidation reaction tank, the bottom end of the sludge inclined plate extends to a position close to the lower side of the three-phase separation plate, and a gap for water and sludge flow is arranged between the sludge inclined plate and the three-phase separation plate.

2. The small-sized non-powered internal reflux three-phase separation structure for rural domestic sewage treatment according to claim 1, characterized in that: A long hair fiber filter tank is arranged on one side upper portion in the biological sedimentation tank, the tank bottom of the long hair fiber filter tank is communicated with the biological sedimentation tank, a drainage outlet is communicated with the water outlet side of the long hair fiber filter tank, and long hair fiber filter cloth is arranged in the long hair fiber filter tank.

3. The small-sized non-powered internal reflux three-phase separation structure for rural domestic sewage treatment according to claim 1 or 2, characterized in that: The contact oxidation reaction tank is provided with an aeration device and suspended MBBR biological fillers.

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