Honeycomb type domestic sewage ecological treatment infiltration system

Abstract

The invention discloses a honeycomb type domestic sewage ecological treatment infiltration system, and belongs to the technical field of sewage treatment. The device comprises a box body and is characterized in that a water inlet section, a plurality of percolation sections and a water outlet section are sequentially connected in the length direction of the box body, the water inlet section is a closed space, a sewage inlet is formed in the upper portion or the upper side face of the water inlet section, and a water outlet communicated with the percolation sections is formed in the lower side face of the water inlet section; a plurality of percolation pipes are arranged in the percolation section in the direction perpendicular to the length direction, the porosity of the percolation pipes is larger than or equal to 20%, the percolation pipes are filled with filter materials, and the positions between the percolation pipes are filled with porous biological filler; and the water outlet section is connected with the water outlet of the percolation section. The problem that the filler area is easy to block can be solved, and meanwhile, the sewage treatment effect can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and more specifically, relates to a honeycomb-type domestic sewage ecological treatment and infiltration system. Background Art

[0002] With the improvement of rural living environments, the need for more efficient wastewater discharge and energy conservation and emission reduction is driving rural wastewater treatment technologies towards low-energy consumption, low-maintenance, and low-investment approaches. Consequently, ecological treatment technologies have long held advantages in rural wastewater treatment. However, in practice, processes such as constructed wetlands and soil infiltration suffer from issues such as the clogging of media fillers, high replacement costs, and significant temperature impacts on treatment effectiveness, resulting in limited adaptability of ecological processes.

[0003] For example, the patent application document with Chinese patent application number 202111153961.2 and application publication date November 26, 2021 discloses a percolation system and sewage treatment method. The patented percolation system includes a percolation device, a water storage device, an ultrasonic device and a drainage device: the water outlet end of the percolation device is connected to the water storage device through a connecting layer, and the connecting layer is arranged at the inner bottom of the water storage device; the ultrasonic device is connected to the water storage device; the drainage device is connected to the water storage device through a water outlet structure, and the water inlet end of the water outlet structure is arranged on the side of the water storage device. The percolation device in the percolation system is provided with a first reaction zone and a second reaction zone from top to bottom. The fillers in the two reaction zones are prone to clogging, and replacement is complicated and costly.

[0004] The Chinese patent application number is 201920799597.9, and the application publication date is May 29, 2019. The patent application document discloses a high-efficiency domestic sewage ecological treatment device. The device includes a sedimentation tank, an inlet pipe, an outlet pipe, an anti-blocking device, a water distribution pipe, a housing, a drain outlet, aquatic plants, a first filler layer, and a second filler layer. By arranging an anti-blocking device on the outlet pipe, the problem of impurities in the sewage easily clogging the grille and pipe, making the water flow blocked and inconvenient to clear the blockage is solved. The sewage enters the outlet pipe, then flows into the first connecting port and enters the housing. The sewage and debris pass through the first filter frame, the second filter frame, and the third filter frame in the housing in turn, undergoing layer-by-layer filtration, and enter the water distribution pipe through the second connecting port. The housing cover can be removed by grabbing the handle, and then the first filter frame, the second filter frame, and the third filter frame can be taken out and replaced, achieving the beneficial effects of low anti-blocking cost, simple use, and easy replacement. However, adding an anti-blocking device separately increases cost and complicates the structure.

[0005] Therefore, it is urgent to design a honeycomb domestic sewage ecological treatment infiltration box to solve the problem of easy clogging in the filler area. Summary of the Invention

[0006] 1. Problem to be solved The purpose of the present invention is to provide a honeycomb-type domestic sewage ecological treatment and infiltration system, which aims to solve the problem of easy clogging of the filler area and at the same time improve the sewage treatment effect.

[0007] 2. Technical Solution In order to solve the above problems, the technical solutions adopted by the present invention are as follows: A honeycomb-type domestic sewage ecological treatment and filtration system includes a box body, wherein a water inlet section, a plurality of filtration sections and a water outlet section are sequentially connected in the length direction of the box body: The water inlet section is a closed space with a sewage inlet located on its top or side, and a water outlet located on its lower side leading to the infiltration section. The water inlet section provides a retention space for sewage, creating suitable hydraulic conditions for sewage to enter the subsequent treatment section. The infiltration section has multiple infiltration tubes arranged perpendicular to the length. The porosity of the infiltration tubes is ≥20%, which facilitates water flow. The infiltration tubes are filled with filter material, and each infiltration tube can be removed and replaced with filter material, which improves clogging and increases service life. The porous biological fillers filled between the infiltration tubes have a large specific surface area, providing living space for microorganisms and also improving clogging. The filtration section improves clogging problems through the synergistic effect of the infiltration tubes and the porous biological fillers filled between the tubes, while also increasing service life. The outlet section is connected to the outlet of the infiltration section.

[0008] As a possible implementation of the present invention, two filtration sections are provided, and the particle size of the filter material in each filtration section decreases successively along the outflow direction of the sewage.

[0009] As a possible implementation of the present invention, the particle sizes of the filter materials in each filtration section are 4-8 mm and 2-4 mm respectively along the effluent flow direction of the sewage.

[0010] As a possible implementation manner of the present invention, the filter material in each filtration section is coal slag and / or fine sand; and the filtration tube is a regular hexagonal tube.

[0011] As a possible implementation manner of the present invention, the porous biological filler is a polyurethane sponge filler with an open porosity of 99%; and the infiltration pipe is made of sandless concrete.

[0012] As a possible embodiment of the present invention, a pretreatment section is further provided between the water inlet section and the filtration section, and the pretreatment section is filled with filter materials with particle sizes from large to small in sequence from bottom to top, wherein the particle size of the filter material in the pretreatment section is larger than the particle size of the filter material in the filtration section. Under working conditions, the flow direction of the sewage in the pretreatment section is from bottom to top.

[0013] As a possible embodiment of the present invention, the pretreatment section is filled from bottom to top with large particles of materials such as volcanic rock and ceramsite as filter media, with volcanic rock (particle size 16-32 mm) at the bottom and ceramsite (particle size 8-16 mm) in the middle. The surface is covered with soil to facilitate plant cultivation.

[0014] As a possible embodiment of the present invention, the tops of the pretreatment section and the filtration section are provided with openings running through their lengths, with planting areas set up at the openings. Using ecological methods, different plants are planted in different zones to selectively absorb substances in the sewage and enhance the filtration effect.

[0015] In one possible embodiment of the present invention, a closed disinfection section is provided between the last filtration section and the outlet section along the length of the tank. A chlorine tablet dosing tube is inserted into the disinfection section, the bottom end of which extends into the dissolution tank. The outlet section is connected to the outlet of the dissolution tank. The chlorine tablets are dissolved in the water in the dissolution tank, disinfecting the water and improving the quality of the outlet water.

[0016] As a possible implementation manner of the present invention, a grid is provided at the bottom end of the chlorine tablet feeding pipe, and the chlorine tablets fall onto the grid.

[0017] In one possible embodiment of the present invention, a connecting angle is formed at one end of the outer casing of the pretreatment section and several filtration sections. This connecting angle is designed to fit over the outer corner of an adjacent casing, and the space between the connecting angle and the corner is filled with asphalt oil. The casing is constructed by splicing together sections, which facilitates transportation, assembly, and underground burial, resulting in efficient installation.

[0018] As a possible embodiment of the present invention, an insulation layer is provided on the outer surface of the box. The insulation layer is made of environmentally friendly PU material. The PU insulation material is environmentally friendly, waterproof, corrosion-resistant and highly durable. The infiltration box is insulated in winter, thereby effectively improving the infiltration effect in winter.

[0019] 3. Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: (1) In the infiltration system of the present invention, a plurality of infiltration tubes are arranged inside the infiltration section, which are convenient for removal, cleaning and replacement without replacing the entire box; porous biological fillers, such as polyurethane sponge fillers, are used to fill the gaps between the infiltration tubes to improve the clogging problem and increase the service life; wherein, the porous biological filler has an opening rate of 99% and a large specific surface area, and microorganisms can reproduce and grow on its surface to form a highly active biofilm, which can effectively degrade organic pollutants, ammonia nitrogen, etc.; different media fillers are used inside and outside the infiltration tube, which has the characteristics of both ecological and biological methods, increases the pollutant removal effect, and can also prevent clogging and is easy to maintain.

[0020] (2) The infiltration system of the present invention has been applied in actual engineering. Its treatment system mainly consists of three parts: plants, soil and filler media, and microorganisms. The principle of plant action is metabolism and absorption. Organic matter is removed through plant metabolism. Plant root secretions have an inactivating effect on E. coli and pathogens, while absorbing a considerable amount of nitrogen, phosphorus and difficult-to-degrade organic matter. The reaction types of soil and filler media are physical reactions and physicochemical reactions, mainly including adsorption and filtration, removing suspended matter, organic pollutants, N, P and other substances; Microbial action mainly involves biological decomposition of cohesive and soluble solids through bacterial metabolism, and denitrification through biological nitrification-denitrification; Through the above three effects, the domestic sewage is purified to meet the Class B emission standard requirements of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" GB18918-2002, and has broad application prospects in rural domestic sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a box in the infiltration system of the present invention; Figure 2 A top view of the infiltration system of the present invention; Figure 3 Schematic cross-sectional view of the infiltration system of the present invention along the length direction; Figure 4 for Figure 2 A partial enlarged view of area A in the middle; Figure 5 Comparison photos of water inlet and outlet in the embodiment; In the picture: 1. Box body; 11. Corner; 12. Connection corner; 13. Insulation layer; 2. Water inlet section; 3. Pretreatment section; 4. Filtration section; 41. First filtration zone; 42. Second filtration zone; 401. Filtration pipe; 402. Porous biological filler; 5. Planting area; 6. Disinfection section; 61. Chlorine tablet dosing pipe; 611. Grid; 612. Chlorine tablet; 62. Dissolution tank; 7. Water outlet section. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] Example The honeycomb-type domestic sewage ecological treatment and filtration system of this embodiment includes a box body 1, which is spliced ​​in the length direction to form various sewage treatment sections, namely, an inlet section 2, two filtration sections 4 and an outlet section 7 connected in sequence: The water inlet section 2 is a closed space with a sewage inlet located on its top or side, and a water outlet located on its lower side leading to the infiltration section 4. This means that sewage flows from top to bottom in the water inlet section 2, providing a retention space for the sewage and creating suitable hydraulic conditions for the sewage to enter the subsequent treatment stage. Infiltration section 4. In this embodiment, two infiltration sections 4 are arranged along the sewage flow direction, including a first infiltration zone 41 and a second infiltration zone 42. The water inlet of the first infiltration zone 41 is connected to the water outlet of the pretreatment section 3, and the water outlet of the first infiltration zone 41 is connected to the water inlet of the second infiltration zone 42. The design principle of sewage flow in the same area is from bottom to top or from top to bottom. In the first infiltration zone 41 and the second infiltration zone 42, multiple infiltration tubes 401 are arranged perpendicular to the length direction respectively. The porosity of the infiltration tubes 401 is ≥20%, and they are made of sandless concrete to facilitate water flow. In order to increase the number of infiltration tubes 401 and make full use of the space in the infiltration section, the infiltration tubes 401 are configured as regular hexagonal tubes.

[0024] The percolation tubes 401 are filled with filter material. Along the sewage flow path, the filter material particle size in the percolation tubes 401 in the first percolation zone 41 is larger than the filter material particle size in the percolation tubes 401 in the second percolation zone 42. In this embodiment, the filter material in the percolation tubes 401 in the first percolation zone 41 is 4-8 mm thick coal slag and / or fine sand, for example, in a 1:1 ratio. The filter material in the percolation tubes 401 in the second percolation zone 42 is 2-4 mm thick coal slag and / or fine sand, for example, in a 1:1 ratio. The filter material in each percolation tube can be removed and replaced individually, reducing clogging issues and extending service life.

[0025] Porous biological fillers 402 are filled between each infiltration tube 401. In this embodiment, the polyurethane sponge filler with an open porosity of 99% has a large specific surface area, provides a living space for microorganisms, and can also improve the clogging problem; the infiltration section improves the clogging problem through the synergistic effect of the infiltration tube and the porous biological filler filled between the tubes, while increasing the service life.

[0026] The water outlet section 7 is connected to the water outlet of the second filtration zone 42 .

[0027] In order to further prevent blockage, a pretreatment section 3 can be optionally set before the infiltration section 4, and the pretreatment section 3 is filled with filter materials with particle sizes from large to small from bottom to top, wherein the particle size of the filter material in the pretreatment section 3 is larger than the particle size of the filter material in the infiltration section 4. In this embodiment, the pretreatment section 3 is filled with large-particle materials such as volcanic rock and ceramsite from bottom to top as filter materials, wherein the volcanic rock particle size of 16~32mm is located at the bottom, and the ceramsite particle size of 8~16mm is in the middle. Under working conditions, the flow direction of sewage in the pretreatment section 3 is from bottom to top.

[0028] To improve water treatment efficiency, openings are provided at the tops of pretreatment section 3 and infiltration section 4, running through their lengths. Planting areas 5 are located at these openings. Using ecological methods, different plants are planted in separate zones to selectively absorb substances in the wastewater and enhance the infiltration effect. In this embodiment, planting areas 5 employ zoned planting, allowing for the cultivation of landscape plants or vegetables with well-developed root systems, such as celery and water spinach. Furthermore, due to the different maturity stages of the plants, zoned planting also facilitates harvesting.

[0029] like Figure 2 、 Figure 3 、 Figure 4 As shown, in the longitudinal direction of the box body 1, a closed disinfection section 6 can be further provided between the second filtration zone 42 and the water outlet section 7. A chlorine tablet feeding pipe 61 is inserted into the disinfection section 6. The bottom end of the chlorine tablet feeding pipe 61 extends into the dissolution box 62 and is provided with a grid 611. Chlorine tablets 612 are fed through the chlorine tablet feeding pipe 61 and fall onto the grid 611. The dissolution box 62 is a container with an opening on the side, i.e., chlorine tablets 612 are fixed in the dissolution box 62. The sewage flows from top to bottom in the disinfection section 6, is disinfected by the chlorine tablets 612 in the dissolution box 62, and then flows out from the water outlet to the water outlet pipe, i.e., the water outlet section 7.

[0030] The outlet section 7 is connected to the outlet of the dissolution tank 62. The chlorine tablets are dissolved in the water in the dissolution tank to disinfect the water and improve the quality of the outlet water.

[0031] It should be noted that in order to ensure the convenience of underground splicing and transportation and replacement, Figure 1 As shown, a connection angle 11 is formed at one end of the box body 1 outside the pretreatment section 3 and several infiltration sections 4. The connection angle 11 is used to be connected to the outside of the corner 12 of the adjacent box body. Asphalt oil is filled between the connection angle 11 and the corner 12 for bonding and water seepage prevention. The box body is assembled in sections, which is convenient for transportation, and is also convenient for splicing and installation and burying in the ground, with high installation efficiency. An insulation layer 13 is provided on the outer surface of the box body 1. The insulation layer 13 is made of environmentally friendly PU material. The PU insulation material is environmentally friendly, waterproof, corrosion-resistant, and highly durable. It insulates the infiltration box in winter, effectively improving the infiltration effect in winter.

[0032] The installation process of the filtration system in this embodiment is as follows: the box body 1 has a total height of 1m. During installation, the anti-seepage membrane and the thermal insulation layer 13 are first attached to the outside of the box body, and then the spaces of the water inlet section 2, the pretreatment section 3, the first filtration area 41, the second filtration area 42 and the disinfection section 6 are sequentially spliced. Figure 1 The assembly of the housing 1 is complete. After installation, fill 50% of the bottom of the pretreatment section 3 with volcanic rock (particle size 16-32 mm), and 30% of the space above it with ceramsite (particle size 8-16 mm). Install the infiltration pipes 401 in the first and second infiltration zones 41, 42. Fill the spaces between the pipes with polyurethane sponge fillers, and fill the infiltration pipes 401 with filter media. Install the chlorine tablet dosing pipe 61 and dissolution tank 62 in the disinfection section 6, and finally install the inlet and outlet pipes. Plant plants in the remaining space above the pretreatment section 3 and on top of the first and second infiltration zones 41, 42, completing the installation of the entire infiltration system.

[0033] During normal operation, sewage enters the water inlet pipe and is evenly distributed through the water outlet in the water inlet section 2. It is filtered in sequence through the pretreatment section 3, the first infiltration zone 41, and the second infiltration zone 42. After being partially absorbed by the plants in the planting area 5, it enters the disinfection section 6 for disinfection before discharge. In this embodiment, the water in the water inlet section 2 is rural domestic sewage. After being treated by the infiltration system, the water outflow section 7 is compared before and after. Figure 5 As shown, the effluent is clear and transparent, meeting the Class B emission standard requirements of the Pollutant Discharge Standard for Urban Wastewater Treatment Plants GB18918-2002.

[0034] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs a structure and embodiment similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A honeycomb-type domestic sewage ecological treatment and infiltration system, comprising a housing (1), characterized in that: The box body (1) is provided with a water inlet section (2), a plurality of filtration sections (4) and a water outlet section (7) connected in sequence in the longitudinal direction: The water inlet section (2) is a closed space, with a sewage inlet provided at the top or upper side thereof, and a water outlet provided at the lower side thereof leading to the infiltration section (4); A filtration section (4) is provided with a plurality of filtration tubes (401) arranged perpendicular to the length direction thereof, wherein the porosity of the filtration tubes (401) is ≥20%, the filtration tubes (401) are filled with filter material, and porous biological fillers (402) are filled between the filtration tubes (401); The water outlet section (7) is connected to the water outlet of the filtration section (4).

2. The honeycomb-type domestic sewage ecological treatment and infiltration system according to claim 1, characterized in that: Two filtration sections (4) are provided, and the particle size of the filter material in each filtration section (4) decreases successively along the outflow direction of the sewage.

3. The honeycomb-type domestic sewage ecological treatment and infiltration system according to claim 2, characterized in that: The particle sizes of the filter media in each filtration section (4) are 4~8mm and 2~4mm respectively along the effluent flow direction of the sewage.

4. The honeycomb-type domestic sewage ecological treatment and infiltration system according to claim 3, characterized in that: The filter material in each filtration section (4) is coal slag and / or fine sand; and the filtration tube (401) is a regular hexagonal tube.

5. The honeycomb-type domestic sewage ecological treatment and infiltration system according to claim 1, characterized in that: The porous biological filler (402) is a polyurethane sponge filler with an open porosity of 99%; the infiltration pipe (401) is made of sandless concrete.

6. A honeycomb-type domestic sewage ecological treatment and infiltration system according to any one of claims 1 to 5, characterized in that: A pretreatment section (3) is further provided between the water inlet section (2) and the filtration section (4), and the pretreatment section (3) is filled with filter materials of decreasing particle sizes from bottom to top, wherein the particle size of the filter materials in the pretreatment section (3) is larger than the particle size of the filter materials in the filtration section (4). In the working state, the flow direction of the sewage in the pretreatment section (3) is from bottom to top.

7. The honeycomb-type domestic sewage ecological treatment and infiltration system according to claim 6, characterized in that: The tops of the pretreatment section (3) and the infiltration section (4) are provided with openings running through their lengths, and a planting area (5) is provided at the openings.

8. The honeycomb-type domestic sewage ecological treatment and infiltration system according to claim 7, characterized in that: In the longitudinal direction of the box body (1), a closed disinfection section (6) is provided between the last percolation section (4) and the water outlet section (7). A chlorine tablet dosing pipe (61) is inserted into the disinfection section (6), and the bottom end of the chlorine tablet dosing pipe (61) extends into the dissolution box (62). The water outlet section (7) is connected to the water outlet of the dissolution box (62).

9. The honeycomb-type domestic sewage ecological treatment and infiltration system according to claim 8, characterized in that: A connecting corner (11) is formed at one end of the box body (1) outside the pretreatment section (3) and the plurality of filtration sections (4). The connecting corner (11) is used to be sleeved on the outside of the corner (12) of the adjacent box body. Asphalt oil is filled between the connecting corner (11) and the corner (12).

10. The honeycomb-type domestic sewage ecological treatment and infiltration system according to claim 8, characterized in that: A heat-insulating layer (13) is provided on the outer surface of the box body (1).

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