Anti-clogging backwashing system of soil purification tank

Abstract

The utility model belongs to the technical field of sewage treatment, and particularly relates to an anti-blocking backwashing system of a soil purification tank. Comprising a grating tank, an anaerobic fermentation tank and a soil infiltration bed which are sequentially communicated through pipelines, a water outlet valve is arranged at a water outlet end, a gas and water distribution pipeline system is arranged in the soil infiltration bed, the gas and water distribution pipeline system comprises a water collecting header pipe, water collecting branch pipes, a water distribution header pipe, water distribution branch pipes and breather pipes, and the water distribution header pipe is communicated with the water distribution branch pipes. The breather pipe is communicated with a water collecting branch pipe through one end of a three-way pipe, the water collecting branch pipe is communicated with a water collecting main pipe, an air check valve is arranged on the breather pipe, and a one-way breather valve is arranged at the joint of the water collecting branch pipe and the water collecting main pipe; the problems of water distribution system blockage and filler pore blockage degradation are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, especially an anti-blocking backwashing system for a soil purification tank. Background Art

[0002] A soil purification tank is a soil treatment system mainly composed of an anaerobic tank, a regulating tank and a soil purification tank body. Through anaerobic treatment, regulation, capillary and siphon effects of enhanced fillers, decomposition of biofilms and absorption of plants, the sewage can reach the standard; and the process has a low construction cost, simple management, and low operation and maintenance costs. When the elevation is appropriate, there can be no power facilities; however, it has a large floor area, and turf or cash crops can be planted above the system. It is suitable for sewage treatment with characteristics such as mainly domestic sewage, large daily variations in water quality and quantity, and light pollution load; the sewage treated by this device can stably reach the first-class B standard of the "Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants" GB18918 - 2002.

[0003] In the prior art, the two core technologies of a soil purification tank / subsurface flow wetland are water distribution and aeration, and fillers, which are also the key factors affecting the treatment effect of the soil purification tank. In the actual use process, the blockage of the water distribution pipeline or the water passage is the main reason for the failure of the soil purification tank / subsurface flow wetland. Once the system is blocked, it can only be replaced and cleaned.

[0004] Therefore, this application proposes an anti-blocking backwashing system for a soil purification tank. Content of the Utility Model

[0005] The purpose of the utility model is to propose an anti-blocking backwashing system for a soil purification tank to solve the problems of blockage of the water distribution system and blockage and degradation of filler pores.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The anti-blocking backwashing system for a soil purification tank includes a grille tank, an anaerobic fermentation tank and a soil percolation bed that are connected in sequence through pipelines. An outlet valve is arranged at the outlet end. A water distribution and aeration pipeline system is arranged in the soil percolation bed. The water distribution and aeration pipeline system includes a water collection main pipe, water collection branch pipes, a water distribution main pipe, water distribution branch pipes and a ventilation pipe. The water distribution main pipe is connected to the water distribution branch pipes. One end of the ventilation pipe is connected to the water collection branch pipe through a tee joint. The water collection branch pipes are connected to the water collection main pipe. A gas shut-off valve is arranged on the ventilation pipe, and a one-way ventilation valve is arranged at the connection of the water collection branch pipe and the water collection main pipe.

[0008] Further, blind plugs are arranged at the ends of the water distribution main pipe, water distribution branch pipes and water collection main pipe.

[0009] Further, a cleaning and reflux tank is arranged at the outlet end of the soil percolation bed. A guiding pipe is arranged on the cleaning and reflux tank, and a reflux outlet valve is arranged on the guiding pipe.

[0010] Furthermore, a plain soil layer and a geomembrane layer are sequentially arranged in the soil infiltration bed from bottom to top.

[0011] Furthermore, turf or cash crops are planted on top of the soil infiltration bed.

[0012] The utility model has at least one of the following beneficial effects:

[0013] The utility model combines the technological characteristics of soil purification tank / subsurface flow wetland, improves on the basis of the original air and water distribution pipelines, adds air-locking valves, one-way vent valves, reflux outlets, suspended cleaning trough units and other comprehensive technical measures to solve the problems of blockage in the water distribution system and blockage and degradation of filler pores. When the water outlet valve and the air-locking valve of the air distribution pipe are closed, the reflux outlet valve is opened, and pressure water of ≤1.6MPa is injected from the original water inlet through a mobile pressure machine, and the blocked suspended matter is guided to the cleaning trough for salvage and cleaning through a guide pipe.

[0014] The dredging mechanism is mainly divided into three parts:

[0015] ① Air-closing valve: each air distribution pipe is equipped with an air-closing valve to form a closed pipeline, guiding the pressure medium to clear the original hydraulic channel.

[0016] ② One-way vent valve: a one-way vent valve is installed at the diversion point between the main pipe and the branch pipe to prevent the backflow of the medium and obstruction.

[0017] ③Add a cleaning and reflux chute, and arrange a guide pipe at the upper end to guide the blocked suspended matter to be discharged and cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the axial side of the water distribution pipe and water collection pipe of the utility model;

[0019] Figure 2 This is a cross-sectional view of the tank pipe and bracket of the utility model;

[0020] Figure 3 It is a schematic diagram of the overall structure of the utility model.

[0021] In the figure, 1-grid tank; 2-anaerobic fermentation tank; 3-soil infiltration bed; 4-water collection main pipe; 5-water collection branch pipe; 6-water distribution main pipe; 7-water distribution branch pipe; 8-vent pipe; 9-air shut-off valve; 10-one-way vent valve; 11-clearing return trough. DETAILED DESCRIPTION

[0022] like Figures 1 - 3 In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] Embodiment

[0024] A soil purification tank anti-blocking backwashing system, comprising a grille tank 1, an anaerobic fermentation tank 2 and a soil infiltration bed 3 connected in sequence through pipelines. An outlet valve is provided at the water outlet end. A gas and water distribution pipeline system is provided in the soil infiltration bed 3. The gas and water distribution pipeline system includes a water collection main pipe 4, a water collection branch pipe 5, a water distribution main pipe 6, a water distribution branch pipe 7 and a ventilation pipe 8. The water distribution main pipe 6 is connected to the water distribution branch pipe 7. One end of the ventilation pipe 8 is connected to the water collection branch pipe 5 through a tee. The water collection branch pipe 5 is connected to the water collection main pipe 4. An airtight valve 9 is provided on the ventilation pipe 8. A one-way ventilation valve 10 is provided at the connection between the water collection branch pipe 5 and the water collection main pipe 6.

[0025] Among them, blind plugs are provided at the ends of the water distribution main pipe 6, the water distribution branch pipe 7 and the water collection main pipe 4.

[0026] Among them, a cleaning and backflow tank 11 is provided at the water outlet end of the soil infiltration bed 3. A guiding pipe is provided on the cleaning and backflow tank 11, and a backflow outlet valve is provided on the guiding pipe.

[0027] Among them, a plain soil layer and a geomembrane layer are sequentially arranged in the soil infiltration bed 3 from bottom to top.

[0028] The utility model combines the process characteristics of the soil purification tank / subsurface flow wetland, improves on the basis of the original gas and water distribution pipeline, and adds comprehensive technical measures such as an airtight valve, a one-way ventilation valve, a backflow outlet, and a suspended cleaning tank unit to solve the problems of blockage of the water distribution system and blockage and degradation of the filler pores. When the outlet valve and the airtight valve of the air distribution pipe are closed and the backflow outlet valve is opened, water with a pressure of ≤1.6 MPa is injected through a mobile pressure pump from the original water inlet, and the blocked suspended matter is guided to the cleaning tank through the guiding pipe for salvage and cleaning.

[0029] Among them, turf or cash crops are planted on the top of the soil infiltration bed 3 to increase its practicality.

[0030] Although the present utility model has been described herein with reference to multiple illustrative embodiments of the present utility model, it should be understood that those skilled in the art can design many other modifications and embodiments that will fall within the scope of the principles and spirit disclosed in this application. More specifically, within the scope of this application's disclosure, the accompanying drawings and the claims, various variations and improvements can be made to the components and / or layout of the subject combination layout. In addition to the variations and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. The anti-clogging backwashing system for a soil purification tank, comprising a grid tank (1), an anaerobic fermentation tank (2) and a soil infiltration bed (3) that are connected in sequence through pipelines, with an outlet valve provided at the outlet end. A gas and water distribution pipeline system is provided in the soil infiltration bed (3). The gas and water distribution pipeline system includes a main water collection pipe (4), water collection branch pipes (5), a main water distribution pipe (6), water distribution branch pipes (7) and a ventilation pipe (8). The main water distribution pipe (6) is connected to the water distribution branch pipes (7). One end of the ventilation pipe (8) is connected to the water collection branch pipe (5) through a tee joint, and the water collection branch pipe (5) is connected to the main water collection pipe (4). It is characterized in that: An airtight valve (9) is provided on the vent pipe (8), and a one-way ventilation valve (10) is provided at the connection of the water collection branch pipe (5) and the water collection main pipe (4).

2. The anti-clogging backwashing system for the soil purification tank according to claim 1, wherein: Blind plugs are provided at the ends of the water distribution main pipe (6), the water distribution branch pipe (7) and the water collection main pipe (4).

3. The anti-clogging backwashing system for the soil purification tank according to claim 1, characterized in that: A cleaning and reflux trough (11) is provided at the water outlet end of the soil infiltration bed (3). A guiding pipe is provided on the cleaning and reflux trough (11), and a reflux outlet valve is provided on the guiding pipe.

4. The anti-clogging backwashing system for a soil purification tank according to claim 1, characterized in that: A plain soil layer and a geomembrane layer are sequentially arranged in the soil infiltration bed (3) from bottom to top.

5. The anti-clogging backwashing system for a soil purification tank according to claim 1, wherein: Turf or cash crops are planted on the top of the soil infiltration bed (3).

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