CN114291980A - Simple filtration system and method for rural domestic wastewater - Google Patents

Abstract

The invention discloses a rural domestic wastewater simple filtering system, which comprises: sealed retaining structure, filtration and business turn over water structure, sealed retaining structure includes prevention of seepage water braced frame, cistern, prevention of seepage clay, lower floor support soil, prevention of seepage water braced frame is located the outside of cistern, the lower floor supports soil and is located between prevention of seepage water braced frame and the cistern, prevention of seepage clay is located the upside that the lower floor supported soil, filtration includes upper vegetation, upper filtering soil, filters sand, gravel, filters fine sand, business turn over water structure includes inlet tube and outlet pipe, the inlet tube sets up and is filtering between fine sand and the prevention of seepage clay. Through setting up sealed retaining structure, filtration and business turn over water structure, can filter and collect domestic waste water, play the effect to domestic waste water purification and collection, improved domestic waste water's utilization ratio.

Description

A light and simple filtration system and method for rural domestic wastewater

technical field

The invention belongs to the technical field of waste water treatment equipment, and in particular relates to a light and simple filtration system and method for rural domestic waste water.

Background technique

Domestic wastewater is sewage produced in the process of living. In rural areas, domestic wastewater is usually discharged anywhere, and the discharged domestic wastewater cannot be collected and recycled, resulting in low water utilization efficiency. The collection and reuse of domestic wastewater is currently a research topic. One of the subjects is that the current rural sewage treatment system has complex structure, high operating cost and poor environmental adaptability. The soil layer in nature has the function of naturally filtering water bodies and can filter waste water. The filtration process is environmentally friendly and will not generate new pollutants. If the characteristics of natural filtration are used to filter domestic wastewater, and then collect and utilize it, it can improve the utilization efficiency of water bodies and achieve the purpose of saving water resources. How to make full use of natural conditions and water movement laws to treat domestic wastewater It is a problem that needs to be solved now.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the purpose of the present invention is to provide a light and simple filtration system and method for rural domestic wastewater. The role of domestic wastewater purification and collection improves the utilization rate of domestic wastewater.

The present invention provides the following technical solutions:

A light and simple filtration system for rural domestic waste water, comprising: a sealed water storage structure, a filtering structure and a water inlet and outlet structure, wherein the sealed water storage structure includes an anti-seepage water support frame, a water storage tank, anti-seepage clay, and a lower layer supporting soil. The anti-seepage water support frame is located on the outer side of the reservoir, the lower layer supporting soil is located between the anti-seepage water support frame and the reservoir, the anti-seepage clay is located on the upper side of the lower layer supporting soil, and the filter structure includes the upper layer vegetation , the upper layer filter soil, filter sand, gravel, filter fine sand, the filter structure is located on the upper side of the anti-seepage clay, and the upper layer vegetation, upper layer filter soil, filter sand, gravel, filter fine sand are arranged in order from top to bottom, The water inlet and outlet structure includes a water inlet pipe and a water outlet pipe, and the water inlet pipe is arranged between the filtering fine sand and the anti-seepage clay.

Preferably, the sealed water storage structure further comprises a reservoir cover and a maintenance ladder, the reservoir cover is located on the upper side of the reservoir, and the maintenance ladder is located on the inner side of the reservoir.

Preferably, an activated carbon filter element is arranged on the inner side of the water outlet pipe, and a water outlet valve is arranged on the water outlet pipe.

Preferably, a water level indicator is provided on the inner side of the reservoir, and the water level indicator is used to measure and display the water level in the reservoir.

Preferably, the gravel includes a first gravel layer and a second gravel layer, the first gravel layer is a coarse gravel layer, the second gravel layer is a fine gravel layer, and the first gravel layer is located in the second gravel layer the upper side.

Preferably, the particle size of the first gravel layer is 40-50 mm, the particle size of the second gravel layer is 2-8 mm, the thickness of the first gravel layer is d, and the thickness of the second gravel layer is 2-6d.

Preferably, the water inlet pipe includes a first water inlet pipe and a second water inlet pipe, and the first water inlet pipe and the second water inlet pipe are symmetrically arranged with each other.

Preferably, a water seepage port is provided in the filtering fine sand layer, a support member is provided in the water seepage port, the water inlet pipe is provided in the support member, and a surface of the support member is provided with a water seepage through hole, and the support member is provided with a water seepage hole. The surface is provided with a cloth layer, which is used to isolate the fine sand and allow water to enter the water inlet pipe.

Preferably, the water inlet end of the water outlet pipe is provided with a water inlet, the reservoir is provided with a first pull wire, the other end of the first pull wire is provided with a floating ball, and the lower side of the floating ball is connected with a spring The lower end of the spring is connected with a plug body, the plug body is located just above the water inlet, and the plug body is adapted to the water inlet.

Preferably, the filter sand is an annular mechanism, the thickness of the filter sand layer is h ₁ , the outer diameter is R ₂ , the inner diameter is R ₁ , and the water treatment volume of the system in one day is Q, then the following relationship is satisfied between them:

π(R ₂ ² - R ₁ ² )·h ₁ =α·ln(Q+3),

In the above formula, the unit of h, R ₁ , and R ₂ is m, the unit of Q is m ³ , and α is the correlation coefficient, and the value ranges from 3 to 7.

Preferably, the thickness of the filtering fine sand is h ₂ , and h ₂ =(0.62-0.95) h ₁ .

Preferably, the bottom of the inner side of the reservoir is provided with a sedimentation net, the sedimentation net is mainly composed of a plurality of square strips arranged alternately in sequence, and a plurality of grooves are formed in the middle of the sedimentation net.

Preferably, the vegetation on the upper layer is one or more of canna, goldenrod, rush and sand grass.

Preferably, an exhaust fan is provided at the opening of the reservoir, and the exhaust fan is used to extract the air in the reservoir to ventilate the reservoir.

A filtration method for a light and simple filtration system for rural domestic wastewater, comprising the following steps:

S1: Drainage of domestic wastewater, the domestic wastewater generated in life is introduced into the filtration system. During the introduction process, it is introduced into the filtration system through multiple inlets to avoid the concentration of domestic wastewater in one area;

S2: Filtration of domestic wastewater, the domestic wastewater is filtered through the upper vegetation, the upper filtering soil, the filtering sand, the gravel and the filtering fine sand in sequence in the filtering system. Wastewater plays a filtering role;

S3: Water body storage, the filtered water body flows into the reservoir, and the reservoir is used to store the water body. During the storage process, it also plays a role in the precipitation of impurities in the water body;

S4: The water body is discharged. When the water level in the reservoir reaches a certain height, it is discharged through the water outlet pipe. The water outlet pipe is provided with an activated carbon filter element, which plays a role in re-filtering the water body;

Preferably, after step S4, there is also step S5: cleaning the reservoir, when the sediment in the reservoir reaches a certain amount, the sediment in the reservoir is cleaned.

Preferably, when laying the filtering fine sand, use tools to compact the fine sand layer to keep the upper surface of the filtering fine sand flat, and then lay a layer of isolation net on the upper surface to isolate the gravel layer and filter the fine sand, and filter the fine sand. After the fine sand is laid, the gravel layer is laid. After the gravel layer is laid, the voids of the gravel layer are filled with sand particles to increase the stability of the gravel layer and at the same time, play a good filtering role. An isolation net is laid on the upper side of the gravel layer, and the isolation net is used to isolate the gravel and the filter sand. When laying the filter sand, the filter sand is compacted with a tool to keep the upper surface of the filter sand flat.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The present invention is a light and simple filtration system and method for rural domestic wastewater. By setting up a sealed water storage structure, a filter structure and a water inlet and outlet structure, the domestic wastewater can be filtered and collected, and the domestic wastewater can be purified and collected. , improve the utilization rate of domestic wastewater.

(2) A light and simple filtering system and method for rural domestic wastewater of the present invention, the filtering structure includes upper vegetation, upper filtering soil, filtering sand, gravel and filtering fine sand, which fully utilizes the filtering function of natural conditions and can achieve both The reuse of sewage has a good ecological protection function.

(3) The present invention is a light and simple filtration system and method for rural domestic wastewater. The system is set below the ground and has the characteristics of simple structure, convenient operation, strong environmental adaptability, and low maintenance cost in the later period, and can be adapted to rural filtration life. wastewater needs.

(4) The present invention is a light and simple filtering system and method for rural domestic wastewater. The system uses vegetation, filtering soil, filtering sand, gravel and filtering fine sand to filter the wastewater. The filtering process does not generate pollutants, and is environmentally friendly. Features, the filtered water body can be reused, which improves the use efficiency of the water body.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

Figure 1 is a schematic diagram of the overall structure of the present invention.

2 is a schematic diagram of the sealed water storage structure, the filter structure, and the water inlet and outlet structures of the present invention.

Fig. 3 is the principle diagram of automatic water discharge of the present invention.

FIG. 4 is a schematic diagram of the support of the present invention.

Figure 5 is a schematic diagram of the precipitation net of the present invention.

In the picture: 1. Vegetation on the upper layer; 2. Water level indicator; 3. Reservoir cover; 4. Filtering soil on the upper layer; 5. Anti-seepage support frame; 6. Filtering sand; 7. Gravel; 8. Filtering fine sand; 9 , outlet valve; 10, activated carbon filter element; 11, first outlet pipe; 12, reservoir; 13, first inlet pipe; 14, lower support soil; 15, seepage-proof clay; 16, second inlet pipe; 17, Maintenance ladder; 18, water inlet; 19, plug body; 20, spring; 21, floating ball; 22, first cable; 23, support piece; 24, sedimentation net; 100, sealed water storage structure; 200, filter structure; 300. Water inlet and outlet structure.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1:

As shown in Figures 1-2, a light and simple filtration system for rural domestic wastewater includes: a sealed water storage structure 100, a filtering structure 200, and a water inlet and outlet structure 300. The sealed water storage structure 100 includes an anti-seepage water support frame 5, Reservoir 12 , anti-seepage clay 15 , and lower layer supporting soil 14 , the anti-seepage water supporting frame 5 is located outside the reservoir 12 , and the lower layer supporting soil 14 is located between the anti-seepage water supporting frame 5 and the reservoir 12 . During the time, the impermeable clay 15 is located on the upper side of the lower support soil 14, the filter structure 200 includes the upper vegetation 1, the upper filter soil 4, the filter sand 6, the gravel 7, and the filter fine sand 8, and the filter structure 200 is located at On the upper side of the anti-seepage clay 15, the upper vegetation 1, the upper filtering soil 4, the filtering sand 6, the gravel 7, and the filtering fine sand 8 are arranged in order from top to bottom, and the water inlet and outlet structure 300 includes a water inlet pipe and a water outlet pipe 11. , the water inlet pipe is arranged between the filtering fine sand 8 and the anti-seepage clay 15 .

The sealed water storage structure 100 further includes a reservoir cover 3 and a maintenance ladder 17 . An activated carbon filter element 10 is arranged on the inner side of the water outlet pipe 11 , and a water outlet valve 9 is arranged on the water outlet pipe 11 .

A water level indicator 2 is provided on the inner side of the reservoir 12 , and the water level indicator 2 is used to measure and display the water level in the reservoir 12 . The gravel 7 includes a first gravel layer and a second gravel layer, the first gravel layer is a coarse gravel layer, the second gravel layer is a fine gravel layer, and the first gravel layer is located on the second gravel layer side. The particle size of the first gravel layer is 40-50mm, the particle size of the second gravel layer is 2-8mm, the thickness of the first gravel layer is d, and the thickness of the second gravel layer is 2-6d .

The water inlet pipe includes a first water inlet pipe 13 and a second water inlet pipe 16, and the first water inlet pipe 13 and the second water inlet pipe 16 are symmetrically arranged with each other.

The reservoir 12 in the sealed water storage structure 100 is placed in the anti-seepage water support frame 5, and is isolated from the outer ecological environment, which can not only prevent the pollution of the outer environment by waste water, but also make the water body filtered by the filtering structure 200 more clean. OK into the reservoir 12. A lower layer of supporting soil 14 is arranged between the reservoir 12 and the anti-seepage water support frame 5 , which not only fixes the relative positions of the reservoir 12 and the anti-seepage water frame, but also provides support for the anti-seepage clay 15 . The anti-seepage clay is placed on the lower supporting soil 14 to provide support for the filtration structure and at the same time prevent the water body from entering the lower supporting soil, so that the filtered water body can better enter the reservoir 12 . After the waste water is discharged into the light filter system, it flows through the upper vegetation 1, enters the upper filter soil 4, and then infiltrates into the filter sand layer 6. After being deposited by the lower gravel 7, it penetrates into the water inlet pipe of the water inlet and outlet structure 300 through the filter sand 8. The water inlet flows into the reservoir 12 through the water inlet. The filtered water is deposited and stored in the reservoir 12, and the water level is displayed in real time on the water level display on the upper part of the filtering system through the water level sensor. After the water level reaches the drainage depth, the water outlet valve 9 can be opened for drainage. The activated carbon filter element 10 performs the final filtration and then discharges the filtration system, that is, the filtration of the entire sewage is completed. When the inlet and outlet of the water inlet pipe are blocked or there is a lot of sediment in the reservoir, open the reservoir cover and enter the reservoir through the maintenance ladder for maintenance and cleaning. When the activated carbon filter element reaches its service life, close the water outlet valve to replace the activated carbon filter element. The light and simple filtration system for rural domestic wastewater and its operation principle have the advantages of simple structure, convenient operation, strong environmental adaptability, low maintenance cost in the later period, and the filtration function of natural conditions is fully utilized. ecological protection function. The invention avoids the problems of complex structure, high operation cost, poor environmental adaptability, and failure to make full use of natural conditions and water movement laws in the current rural sewage treatment system.

Embodiment 2

As shown in Figures 1-5, a light and simple filtration system for rural domestic wastewater includes: a sealed water storage structure 100, a filter structure 200 and a water inlet and outlet structure 300, the sealed water storage structure 100 includes an anti-seepage water support frame 5, Reservoir 12 , anti-seepage clay 15 , and lower layer supporting soil 14 , the anti-seepage water supporting frame 5 is located outside the reservoir 12 , and the lower layer supporting soil 14 is located between the anti-seepage water supporting frame 5 and the reservoir 12 . During the time, the impermeable clay 15 is located on the upper side of the lower supporting soil 14, the filter structure 200 includes the upper vegetation 1, the upper filter soil 4, the filter sand 6, the gravel 7, the filter fine sand 8, and the filter structure 200 is located at On the upper side of the anti-seepage clay 15, the upper vegetation 1, the upper filtering soil 4, the filtering sand 6, the gravel 7, and the filtering fine sand 8 are arranged in order from top to bottom, and the water inlet and outlet structure 300 includes a water inlet pipe and a water outlet pipe 11. , the water inlet pipe is arranged between the filtering fine sand 8 and the anti-seepage clay 15, and a waterproof layer is arranged between the described anti-seepage clay 15 and the filtering fine sand 8, and the waterproof layer is a plastic film layer to improve the anti-seepage clay The anti-seepage effect of 15 makes the filtered water flow into the reservoir. The upper vegetation 1 is one or more of canna, yellow flower warbler tail, rush, and sand grass, which can effectively absorb elements such as nitrogen and phosphorus in the water body, and play the role of purifying water quality and beautifying the environment.

The sealed water storage structure 100 further includes a reservoir cover 3 and a maintenance ladder 17 . An activated carbon filter element 10 is arranged on the inner side of the water outlet pipe 11 , and a water outlet valve 9 is arranged on the water outlet pipe 11 . An exhaust fan is arranged at the opening of the storage tank. When the storage tank is repaired, the air in the storage tank is firstly drawn out by the exhaust fan to replace the air in the storage tank, so as to avoid the lack of oxygen in the storage tank. phenomenon, to ensure the safety of the operator's work.

A water level indicator 2 is provided on the inner side of the reservoir 12 , and the water level indicator 2 is used to measure and display the water level in the reservoir 12 . The gravel 7 includes a first gravel layer and a second gravel layer, the first gravel layer is a coarse gravel layer, the second gravel layer is a fine gravel layer, and the first gravel layer is located on the second gravel layer side. The particle size of the first gravel layer is 40-50mm, the particle size of the second gravel layer is 2-8mm, the thickness of the first gravel layer is d, and the thickness of the second gravel layer is 2-6d At this time, the filtration effect of the gravel layer is the best. When the waste water passes through the gravel layer, the waste water can be fully filtered. The particle size of the filter sand 6 is 0.08-5mm, the apparent density of the filter sand is not less than 2400kg/m ³ , the loose bulk density is not less than 1200kg/m 3 , and the porosity is not more than 40%.

The water inlet pipe includes a first water inlet pipe 13 and a second water inlet pipe 16, and the first water inlet pipe 13 and the second water inlet pipe 16 are symmetrically arranged with each other. The filter fine sand layer 8 is provided with a water seepage port, the water seepage port is provided with a support member 23, the water inlet pipe is arranged in the support member 23, and the surface of the support member 23 is provided with a water seepage through hole. The surface of the piece 23 is provided with a cloth layer, and the cloth layer is used to isolate the fine sand and allow water to enter the water inlet pipe.

A water inlet 18 is provided at the water inlet end of the water outlet pipe, a first pull wire 22 is disposed on the reservoir, and a floating ball 21 is disposed at the other end of the first pull wire 22, and the lower side of the floating ball 21 is connected to There is a spring 20 , the lower end of the spring 20 is connected with a plug body 19 , the plug body 19 is located directly above the water inlet 18 , and the plug body 19 is adapted to the water inlet 18 . When the liquid level of the water body in the reservoir 12 is H1, the floating ball 21 begins to receive an upward buoyancy force. When the liquid level of the water body in the reservoir 12 is H2, the floating ball 21 drives the plug body 19 to move upward, the water inlet 18 is opened, and the water in the reservoir 12 flows out of the reservoir 12 through the water outlet pipe 11. At this time, The liquid level in the reservoir 12 gradually decreases, the plug body 19 falls into the water inlet 18, and the water outlet pipe 11 is in a closed state.

The filter sand is an annular structure, the thickness of the filter sand layer is h ₁ , the outer diameter is R ₂ , the inner diameter is R ₁ , and the water treatment volume of the system in one day is Q, then the following relationship is satisfied between them: π(R ₂ ² - R ₁ ² )·h ₁ =α·ln(Q+3), in the above formula, the unit of h, R ₁ , R ₂ is m, the unit of Q is m ³ , and α is the correlation coefficient, taking the value The range is 3-7. When the above relationship is satisfied, the filtration system can run smoothly and continuously. When α is less than 3, the rate of wastewater infiltration is high, and the filtration effect of wastewater is poor. The rate is low, and there is stagnant water in the upper vegetation, which is not conducive to the growth of the upper vegetation. When the α is within 3-7, the system can continue to filter, and the filtering effect is better. The thickness of the filtering fine sand is h ₂ , h ₂ =(0.62-0.95) h ₁ , when the thickness of the filtering fine sand and the thickness of the filtering sand layer satisfy the above relationship, the working efficiency of filtering the fine sand is high, and the filtering If the thickness of the sand is too high, the utilization rate will be low, resulting in a waste of materials. If the thickness of the filter fine sand is too small, the wastewater filtration treatment effect will be poor, and the wastewater cannot be fully filtered.

The bottom of the inner side of the reservoir 12 is provided with a sedimentation net 24. The sedimentation net 24 is mainly composed of a plurality of square strips that are alternately arranged in turn. A plurality of grooves are formed in the middle of the sedimentation net 24. When the sewage in the reservoir is sedimented. When cleaning the reservoir 12, the sediment is located in the groove. When cleaning the reservoir 12, the friction between the operator and the ground of the reservoir can be increased, the phenomenon of slipping and dumping can be prevented, and the personal safety of the operator can be ensured.

Embodiment 3

A filtration method for a light and simple filtration system for rural domestic wastewater, comprising the following steps:

S1: Drainage of domestic wastewater, the domestic wastewater generated in life is introduced into the filtration system. During the introduction process, it is introduced into the filtration system through multiple inlets to avoid the concentration of domestic wastewater in one area;

S2: Filtration of domestic wastewater, the domestic wastewater is filtered through the upper vegetation, the upper filtering soil, the filtering sand, the gravel and the filtering fine sand in sequence in the filtering system. Wastewater plays a filtering role;

S3: Water body storage, the filtered water body flows into the reservoir, and the reservoir is used to store the water body. During the storage process, it also plays a role in the precipitation of impurities in the water body;

S4: The water body is discharged. When the water level in the reservoir reaches a certain height, it is discharged through the water outlet pipe. The water outlet pipe is provided with an activated carbon filter element, which plays a role in re-filtering the water body.

Embodiment 4

A filtration method for a light and simple filtration system for rural domestic wastewater, comprising the following steps:

S1: Drainage of domestic wastewater, the domestic wastewater generated in life is introduced into the filtration system. During the introduction process, it is introduced into the filtration system through multiple inlets to avoid the concentration of domestic wastewater in one area;

S2: Filtration of domestic wastewater. The domestic wastewater is filtered through the upper vegetation, the upper filtering soil, the filtering sand, the gravel and the filtering fine sand in sequence in the filtering system. Wastewater plays a filtering role;

S3: Water body storage, the filtered water body flows into the reservoir, and the reservoir is used to store the water body. During the storage process, it also plays a role in the precipitation of impurities in the water body;

S4: The water body is discharged. When the water level in the reservoir reaches a certain height, it is discharged through the water outlet pipe. The water outlet pipe is provided with an activated carbon filter element, which plays a role in re-filtering the water body;

S5: Cleaning of the reservoir, when the sediment in the reservoir reaches a certain amount, the sediment in the reservoir is cleaned.

When laying the filtering fine sand 8, use tools to compact the fine sand layer to keep the upper surface of the filtering fine sand 8 flat, and then lay a layer of isolation net on the upper surface to isolate the gravel layer and filter the fine sand. After the sand is laid, the gravel layer is laid. After the gravel layer is laid, the voids of the gravel layer are filled with sand particles to increase the stability of the gravel layer and at the same time, play a good filtering role. An isolation net is laid on the upper side of the gravel layer, and the isolation net is used to isolate the gravel and the filter sand 6. When laying the filter sand 6, the filter sand 6 is compacted with a tool to keep the upper surface of the filter sand flat. . The upper vegetation 1 is one or more of canna, yellow flower warbler tail, rush, and sand grass, which can effectively absorb elements such as nitrogen and phosphorus in the water body, and play the role of purifying water quality and beautifying the environment.

The device obtained through the above technical solution is a light and simple filtration system and method for rural domestic wastewater. By setting up a sealed water storage structure, a filter structure and a water inlet and outlet structure, the domestic wastewater can be filtered and collected, and the domestic wastewater can be purified and collected. The function of collection improves the utilization rate of domestic wastewater.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes; all within the spirit and principle of the present invention, Any modification, equivalent replacement, improvement, etc. made should be included within the protection scope of the present invention.

Claims (8)

1. A rural domestic wastewater light and simple filtration system is characterized by comprising: sealed retaining structure (100), filtration (200) and business turn over water structure (300), sealed retaining structure (100) is including prevention of seepage water braced frame (5), cistern (12), prevention of seepage clay (15), lower floor support soil (14), prevention of seepage water braced frame (5) are located the outside of cistern (12), lower floor support soil (14) are located between prevention of seepage water braced frame (5) and cistern (12), prevention of seepage clay (15) are located the upside that lower floor supported soil (14), filtration (200) are including upper vegetation (1), upper strata filtration soil (4), filter sand (6), gravel (7), filter fine sand (8), filtration (200) are located the upside of prevention of seepage clay (15), upper vegetation (1), upper strata filtration soil (4), filter sand (6), gravel (7), Filter fine sand (8) and set gradually from top to bottom, business turn over water structure (300) is including inlet tube and outlet pipe (11), the inlet tube sets up and is filtering between fine sand (8) and prevention of seepage clay (15).

2. The rural domestic wastewater light and simple filtration system according to claim 1, wherein the sealed water storage structure (100) further comprises a water storage tank cover (3), an access ladder (17), the water storage tank cover (3) is located at the upper side of the water storage tank (12), and the access ladder (17) is located at the inner side of the water storage tank (12).

3. The rural domestic wastewater simple filtration system according to claim 1, wherein the inner side of the water outlet pipe (11) is provided with an activated carbon filter element (10), and the water outlet pipe (11) is provided with a water outlet valve (9).

4. The rural domestic wastewater light and simple filtration system according to claim 1, wherein the water level display (2) is arranged on the inner side of the reservoir (12), and the water level display (2) is used for measuring and displaying the water level height in the reservoir (12).

5. The rural domestic wastewater light and simple filtration system according to claim 1, wherein the gravel (7) comprises a first gravel layer and a second gravel layer, the first gravel layer is a coarse gravel layer, the second gravel layer is a fine gravel layer, and the first gravel layer is positioned on the upper side of the second gravel layer.

6. The rural domestic wastewater light and simple filtration system according to claim 1, wherein the water inlet pipe comprises a first water inlet pipe (13) and a second water inlet pipe (16), and the first water inlet pipe (13) and the second water inlet pipe (16) are arranged symmetrically with each other.

7. The filtration method of the rural domestic wastewater simple filtration system according to any one of claims 1-6, characterized by comprising the following steps:

s1: the drainage of domestic wastewater, namely introducing the domestic wastewater generated in life into a filtering system, and introducing the domestic wastewater into the filtering system through a plurality of introduction ports in the introduction process to avoid the domestic wastewater from concentrating into one area;

s2: filtering domestic wastewater, wherein the domestic wastewater is sequentially filtered by upper-layer vegetation, upper-layer filtering soil, filtering sand, gravel and filtering fine sand in a filtering system, and the upper-layer vegetation, the upper-layer filtering soil, the filtering sand, the gravel and the filtering fine sand all play a role in filtering the domestic wastewater;

s3: the water body is stored, the filtered water body flows into the reservoir, the reservoir is used for storing the water body, and the function of precipitating impurities in the water body is achieved during the storage process;

s4: the water body is discharged, when the water level in the water storage tank reaches a certain height, the water is discharged through the water outlet pipe, the activated carbon filter element is arranged in the water outlet pipe, and the activated carbon filter element plays a role in secondary filtering on the water body.

8. The filtration method of the rural domestic wastewater simple filtration system according to claim 7, wherein after step S4, there is further step S5: and (4) cleaning the reservoir, and cleaning the precipitates in the reservoir after the precipitates in the reservoir reach a certain amount.

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