Rural domestic sewage stage treatment device

Abstract

The utility model belongs to the technical field of water treatment, and particularly relates to a rural domestic sewage stage treatment device which solves the problems that the sewage treatment effect is poor, solid garbage cannot be separated and collected, and waste water and purified water cannot be output in a classified manner. The rural domestic sewage staged treatment device comprises a solid separation tank, and a separation and collection structure used for separating and collecting solids in sewage is arranged in the solid separation tank; a biological water treatment module is arranged in a water storage cavity of the biological purification tank and is used for purifying water; the filtering output pool is used for carrying out multi-stage filtering on the sewage and respectively outputting residual wastewater and filtered purified water; the solid separation tank, the biological purification tank and the filtering output tank are sequentially connected through pipelines. The effects of separating and outputting sewage solid garbage, absorbing and purifying excessive elements in the sewage and outputting purified water wastewater in a classified manner are realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and in particular relates to a rural domestic sewage grading treatment device. Background Art

[0002] With the continuous progress of society, the living standards of rural residents have improved, water consumption has increased, and sewage discharge has also increased. In order to protect the living environment and water environment in rural areas, it is necessary to effectively treat rural domestic sewage and discharge it in a classified manner.

[0003] There are various sewage treatment systems in the existing technology, but most of them are complex in structure and high in cost. In addition, some treatment systems have poor sewage treatment effects and cannot achieve the separation and collection of solid waste and the classified output of clean water and wastewater. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems existing in the prior art and to propose a rural domestic sewage classification treatment device.

[0005] In order to achieve the purpose of innovation of this utility model, the following technical solutions can be used:

[0006] A rural domestic sewage grading treatment device, comprising:

[0007] A solid separation tank is provided with a separation and collection structure for separating and collecting solids in sewage;

[0008] A biological purification pool, wherein the water storage chamber of the biological purification pool is provided with a biological water treatment module for purifying water;

[0009] The filter output tank is used to perform multi-stage filtration on the sewage and output the residual wastewater and filtered clean water separately;

[0010] The solid separation tank, biological purification tank and filtration output tank are connected in sequence through pipelines.

[0011] The rural domestic sewage graded treatment device of the present invention is used for graded treatment of rural domestic water. The domestic sewage enters and passes through the solid separation tank, the biological purification tank and the filter output tank in sequence. The solid separation tank is provided with a separation and collection structure for filtering out solids with a certain volume in the sewage, and can effectively collect them to facilitate subsequent cleaning; the biological purification tank performs biological treatment on the sewage through the biological water treatment module, which can effectively absorb excess nitrogen and other elements in the sewage, and is green and environmentally friendly; the filter output tank is used for performing another filtering treatment before discharge to filter out small-volume solid particles, and output the clean water and wastewater produced by the treatment separately, which is conducive to the specific utilization or discharge of the clean water and wastewater to corresponding places.

[0012] In the above-mentioned rural domestic sewage staged treatment device, the solid separation tank includes a square first tank body, a sewage inlet pipe is provided on the upper part of the first-level tank body, a first outlet pipe is provided on the lower part, and the separation and collection structure is provided between the sewage inlet pipe and the first outlet pipe.

[0013] A sewage inlet pipe and a first outlet pipe are respectively arranged on two opposite sides of the first tank body, and a separation and collection structure is arranged between the two, so that the sewage is input from the sewage inlet pipe, filtered and processed by the separation and collection structure, and then output from the first outlet pipe to the subsequent equipment.

[0014] As an optimization, a sedimentation area is formed at the bottom of the first pool body, the first water outlet pipe is located on the side wall of the sedimentation area and is arranged away from the pool bottom, and a first switch valve is provided on the first water outlet pipe.

[0015] The first outlet pipe is far away from the bottom of the pool, so that a sedimentation area is formed between the first outlet pipe and the bottom of the pool. After the sewage is treated by the separation and collection structure, it accumulates in the sedimentation area. The particulate matter and leaked solid matter can be precipitated here to a certain extent, which has a certain sewage treatment effect and ensures the smooth progress of subsequent treatment.

[0016] In the above-mentioned rural domestic sewage staged treatment device, the separation and collection structure includes a filter conveyor belt assembly and a waste receiving assembly arranged in the first tank body, and the waste receiving assembly is docked below the downstream of the filter conveyor belt assembly.

[0017] The filter conveyor assembly is used to filter out solid matter and convey the solid matter to the waste receiving assembly, which collects the solid matter, thereby achieving the predetermined solid-liquid separation and solid matter collection effects.

[0018] In the above-mentioned rural domestic sewage staged treatment device, the filter conveyor belt assembly includes at least two rollers rotatably connected to the side wall of the first tank body and a filter conveyor belt wrapped around the rollers. The upper end of the filter conveyor belt forms a filter surface. The drive motor is connected to at least one of the rollers for driving the filter conveyor belt to move so as to transfer the filtered solid matter to the waste receiving assembly.

[0019] The filter conveyor belt is wound around the roller, and the drive motor drives the roller to rotate to realize the conveying movement of the filter conveyor belt. It has a simple structure and good filtering effect.

[0020] As an optimization, the filter conveyor belt is tilted, with the downstream rollers higher than the upstream rollers, and the sewage inlet pipe is connected to the upstream or midstream portion of the filter surface. The filter conveyor belt includes a plurality of filter holes evenly distributed on the belt surface, and the filter surface of the filter conveyor belt is evenly distributed along the length direction and has ribs extending along the width direction.

[0021] The filter surface is set at an angle and moves toward a higher position, that is, the discharge direction of sewage is opposite to the movement direction of the filter surface. The ribs on the filter surface are conducive to the hanging of solids and the filter surface carrying solids to the downstream. At the end of the filter surface, due to the action of gravity, the solids fall into the receiving basket, thereby achieving the effect of filtering out and collecting the solids.

[0022] As an optimization, the rural domestic sewage staged treatment device also includes a solar power generation component and a power storage component. The solar power generation component stores electrical energy in the power storage component, and the power storage component is connected to the drive motor for power supply.

[0023] The solar power generation component generates electricity through solar energy, and the storage component is used to store this electricity and supply it to the drive motor, which can effectively utilize green energy and reduce system operating costs.

[0024] In the above-mentioned rural domestic sewage staged treatment device, the waste receiving component includes a material receiving basket with filter holes fixedly mounted on the side wall of the first tank body, the upper opening of the material receiving basket is open, and is connected to the lower downstream of the filter conveyor belt component; a waste cleaning window is opened on the side wall of the first tank body, and the waste cleaning window is located above the material receiving basket. The opening and closing of the waste cleaning window is controlled by the window switch component.

[0025] The receiving basket is arranged below the downstream of the filter conveyor belt and can be used to receive solid matter transported from the filtering surface. It has filter holes, and the residual sewage on the solid matter can also flow down from the filter holes. The position of the waste cleaning window is adapted to the receiving basket. The solid garbage collected in the receiving basket can be cleaned out through the window, and the receiving basket can also be loaded and unloaded. The window switch assembly is used to open and close the window to prevent solid garbage from escaping.

[0026] As an optimization, the window switch assembly includes a blocking plate mounted on the waste cleaning window, or a switch door rotatably connected to the outer wall of the first cell body, and a sealing ring assembly is provided between the blocking plate and the switch door and the waste cleaning window.

[0027] The blocking plate and the switch door can easily achieve the effect of opening and closing the waste cleaning window. The structure is simple and the operation is convenient. Moreover, a sealing ring assembly is arranged in the side seam of the waste cleaning window to further improve the sealing performance when the window is closed, thereby preventing sewage or odor from escaping.

[0028] In the above-mentioned rural domestic sewage staged treatment device, a spare grille is also provided in the first tank body. The spare grille is horizontally placed on the first mounting platform on the inner wall of the first tank body and is located between the separation and collection structure and the first outlet pipe. A number of vertically opened grille filter holes are evenly distributed on the spare grille.

[0029] In order to further ensure the filtering effect, a spare grille is set in the first pool body. Even if solid matter leaks out from the filtering interception of the filtering conveyor belt, the spare grille can intercept the solid matter to ensure the smooth progress of subsequent processing. Moreover, the spare grille is placed on the first mounting table, which is a detachable setting for easy loading and unloading and replacement.

[0030] In the above-mentioned rural domestic sewage staged treatment device, the biological purification pool includes a second pool body with an open top and an ecological floating island floating in the second pool body. The ecological floating island is planted with floating plants whose roots extend into the sewage, and / or a number of biological ropes immersed in the sewage are hung on the ecological floating island, and / or the bottom of the second pool body is planted with submerged plants.

[0031] Wastewater accumulates in the second tank, with the ecological floating islands floating above it. The roots of the floating plants planted on them extend into the wastewater. A bio-rope is also suspended from the ecological floating island, inoculated with the appropriate bacteria and algae, which form a biofilm on the bio-rope. Furthermore, submerged plants are planted at the bottom of the tank. The synergistic effect of these three elements effectively purifies the wastewater in an environmentally friendly manner. The water purification principles of the floating plants, bio-rope, and submerged plants are common knowledge and will not be further explained.

[0032] As an optimization, a biofilm for purifying water quality is formed on the biological rope, a growth matrix is ​​laid on the bottom of the second pool body, and the submerged plants are planted on the growth matrix.

[0033] The bottom of the second pool is paved with growth substrate to ensure the smooth growth of submerged plants.

[0034] In the above-mentioned rural domestic sewage staged treatment device, the outlet of the first outlet pipe of the solid separation tank is connected to the upper mouth of the second tank body, and a second outlet pipe is arranged on the side wall of the solid separation tank away from the bottom of the tank, and a second switch valve is provided on the second outlet pipe.

[0035] The solid separation tank outputs the ecologically treated sewage through the second outlet pipe. A second switch valve is provided in the second outlet pipe. By opening and closing the outlet channel at the right time, the sewage is ensured to stay in the ecological purification tank for a sufficient time.

[0036] In the above-mentioned rural domestic sewage staged treatment device, the filtration output tank includes a third tank body and a multi-stage filtration layer and a reverse osmosis membrane layer arranged from top to bottom in the third tank body. The side wall of the third tank body is connected to a wastewater output pipe and a clean water output pipe. The wastewater output pipe is located between the multi-stage filtration layer and the reverse osmosis membrane layer, and the clean water output pipe is located below the reverse osmosis membrane layer and away from the bottom of the tank. The wastewater output pipe and the clean water output pipe are respectively provided with a wastewater switch valve and a clean water switch valve.

[0037] After entering the third tank, wastewater passes through a multi-stage filtration layer and a reverse osmosis membrane layer. The multi-stage filtration layer removes relatively large solids, while the reverse osmosis membrane layer filters out very small solids. The liquid filtered by the reverse osmosis membrane is clean water, which has high quality and can meet daily needs. The wastewater that does not pass through the reverse osmosis membrane layer is of relatively low quality and can be used for applications such as irrigation. To meet the pressure requirements of the reverse osmosis process, a pressure pump is also installed in the third tank.

[0038] As an optimization, the multi-stage filter layer includes a PP cotton filter mesh layer, a granular activated carbon layer and a compressed activated carbon layer from top to bottom, and has a good filtering effect.

[0039] In the above-mentioned rural domestic sewage staged treatment device, the device also includes a water quality detection component, which includes at least a first detection end for detecting the sewage quality in the water storage chamber, a wastewater detection end for detecting the wastewater quality, and a clean water detection end for detecting the clean water quality.

[0040] The water quality detection component is used to detect the water quality of each node in real time, and to open and close the corresponding switch valve according to the specific water quality conditions of the relevant points. It can also be used to monitor the failure of related equipment.

[0041] As an optimization, the first detection end is located on the upstream side of the second switch valve and extends into the second water outlet pipe; the wastewater detection end is located on the upstream side of the wastewater switch valve and extends into the wastewater output pipe; the clean water detection end is located on the upstream side of the clean water switch valve and extends into the clean water output pipe.

[0042] As an optimization, the positions of the solid separation tank, the biological purification tank and the filter output tank are arranged in a stepped descending manner, or a water pump assembly is respectively provided between the first water outlet pipe and the second water outlet pipe.

[0043] The solid separation tank, biological purification tank and filtration output tank are arranged in a stepped manner, which can realize the downward transportation of sewage by gravity, saving system operating costs; of course, the pressure required for sewage transportation can also be provided by the water pump component, making the downward transportation of sewage more stable.

[0044] Compared with the prior art, the present invention has the following advantages:

[0045] 1. The utility model is used for the graded treatment of rural domestic water. The solid separation tank is provided with a separation and collection structure for filtering out a certain volume of solid matter in the sewage, and can effectively collect it to facilitate subsequent cleaning; the biological purification tank uses the biological water treatment module to biologically treat the sewage, which can effectively absorb excess nitrogen and other elements in the sewage, which is green and environmentally friendly; the filter output tank is used to perform another filtration treatment before discharge to filter out small-volume solid particles, and output the clean water and wastewater produced by the treatment separately, which is conducive to the specific utilization or discharge of the clean water and wastewater to the corresponding places.

[0046] 2. The filter surface is set at an angle. The discharge direction of sewage is opposite to the movement direction of the filter surface. The ribs on the filter surface are conducive to transporting solid matter downstream. At the end of the filter surface, due to the action of gravity, the solid matter falls into the receiving basket, achieving the effect of filtering out and collecting the solid matter.

[0047] 3. The receiving basket is arranged below the downstream of the filter conveyor belt and can be used to receive solid matter transported from the filtering surface. It has filter holes, and the residual sewage on the solid matter can also flow down from the filter holes. The position of the waste cleaning window is adapted to the receiving basket. The solid garbage collected in the receiving basket can be cleaned out through the window, and the receiving basket can also be loaded and unloaded. The window switch assembly is used to open and close the window to prevent solid garbage from escaping.

[0048] 4. The sewage accumulates in the second pool, where the floating plants, submerged plants and the biofilm on the bio-rope work together to efficiently purify the sewage in a green and environmentally friendly way.

[0049] 5. After the sewage enters the third tank, it first passes through a multi-stage filtration layer to remove relatively large solids. The reverse osmosis membrane layer is used to filter out extremely small solids, and then passes through the reverse osmosis membrane layer. The liquid filtered out by the reverse osmosis membrane layer is clean water with high water quality, which can meet the needs of daily life. The wastewater that has not passed through the reverse osmosis membrane layer has relatively low water quality and can be used for irrigation and other applications.

[0050] 6. The water quality detection component is used to detect the water quality of each node in real time, and to switch the corresponding switch valve according to the specific water quality conditions of the relevant points. It can also be used to monitor the failure of related equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of the overall structure provided by the utility model;

[0052] Figure 2 It is a structural schematic diagram of the solid separation tank provided by the utility model.

[0053] In the figure, the solid separation tank 1, the first tank body 11, the sewage input pipe 12, the first outlet pipe 13, the first switch valve 14, the sedimentation area 15, the spare grid 16,

[0054] Biological purification pool 2, second pool body 21, ecological floating island 22, floating plants 23, biological rope 24, submerged plants 25, growth matrix 26, second outlet pipe 27, second switch valve 28,

[0055] Filtration output pool 3, third pool body 31, multi-stage filtration layer 32, reverse osmosis membrane layer 33, wastewater output pipe 34, clean water output pipe 35, wastewater switch valve 36, clean water switch valve 37,

[0056] Separation and collection structure 4, filter conveyor belt assembly 41, waste receiving assembly 42, roller 43, filter conveyor belt 44, rib 45, solar power generation assembly 46, receiving basket 47, waste cleaning window 48, blocking plate 49, filtering surface 50,

[0057] First detection end 61, wastewater detection end 62, and clean water detection end 63. DETAILED DESCRIPTION

[0058] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0059] Specific implementation examples Figure 1 、 2 As shown, the rural domestic sewage classification treatment device includes:

[0060] A solid separation tank 1 is provided with a separation and collection structure 4 for separating and collecting solids in sewage;

[0061] A biological purification pool 2, wherein a biological water treatment module is provided in the water storage chamber of the biological purification pool 2 for purifying water;

[0062] The filter output tank 3 is used to perform multi-stage filtration on the sewage and output the residual wastewater and the filtered clean water respectively;

[0063] The solid separation tank 1, the biological purification tank 2 and the filtration output tank 3 are connected in sequence through pipelines.

[0064] Specifically, the rural domestic sewage graded treatment device of the present invention is used for the graded treatment of rural domestic water. The domestic sewage enters and passes through the solid separation tank 1, the biological purification tank 2 and the filter output tank 3 in sequence. The solid separation tank 1 is provided with a separation and collection structure 4, which is used to filter out a certain volume of solid matter in the sewage, and can effectively collect it to facilitate subsequent cleaning; the biological purification tank 2 uses the biological water treatment module to biologically treat the sewage, which can effectively absorb excess nitrogen and other elements in the sewage, which is green and environmentally friendly; the filter output tank 3 is used to perform another filtering treatment before discharge, filter out small-volume solid particles, and output the clean water and wastewater produced by the treatment separately, which is conducive to the specific utilization or discharge of the clean water and wastewater to the corresponding places.

[0065] like Figure 1 、 2 As shown, the solid separation tank 1 includes a square first tank body 11. A sewage inlet pipe 12 is provided at the top of the first tank body, and a first outlet pipe 13 is provided at the bottom. A separation and collection structure 4 is provided between the sewage inlet pipe 12 and the first outlet pipe 13. A sedimentation area 15 is formed at the bottom of the first tank body 11. The first outlet pipe 13 is located on the side wall of the sedimentation area 15 and is arranged away from the tank bottom. A first on-off valve 14 is provided on the first outlet pipe 13.

[0066] Specifically, a sewage inlet pipe 12 and a first outlet pipe 13 are provided on opposite sides of the first tank body 11, with a separation and collection structure 4 positioned between them. This allows sewage to be input from the sewage inlet pipe 12, filtered by the separation and collection structure 4, and then discharged to subsequent equipment through the first outlet pipe 13. The first outlet pipe 13 is located away from the tank bottom, forming a sedimentation zone 15 between the first outlet pipe 13 and the tank bottom. After being treated by the separation and collection structure 4, the sewage accumulates in the sedimentation zone 15, where particulate matter and leaked solids can be precipitated, achieving a certain sewage treatment effect and ensuring smooth subsequent treatment.

[0067] As an optimization of this embodiment, the separation and collection structure 4 includes a filter conveyor assembly 41 disposed within the first tank body 11 and a waste receiving assembly 42. The waste receiving assembly 42 docks downstream and below the filter conveyor assembly 41. The filter conveyor assembly 41 comprises two rollers 43 rotatably connected to the sidewalls of the first tank body 11, and a filter conveyor belt 44 wound around the rollers 43. The upper end of the filter conveyor belt 44 forms a filter surface 50. A drive motor is in driving connection with one of the rollers 43, driving the filter conveyor belt 44 to convey filtered solids to the waste receiving assembly 42. The filter conveyor belt 44 is tilted, with the downstream roller 43 higher than the upstream roller 43. The outlet of the sewage inlet pipe 12 docks upstream or above the midstream of the filter surface 50. The filter conveyor belt 44 includes a plurality of filter holes evenly distributed along its surface. Ribs 45 extending along its width are evenly distributed along its length.

[0068] Specifically, the filter conveyor assembly 41 is used to filter out solids and transfer the solids to the waste receiving assembly 42, which collects the solids, thereby achieving the desired solid-liquid separation and solid collection effects. The filter conveyor belt 44 is wound around the roller 43, and the roller 43 is driven by a drive motor to rotate to achieve the conveying movement of the filter conveyor belt 44. The structure is simple and the filtering effect is good. The filter surface 50 is set at an angle and moves toward a high position, that is, the discharge direction of the sewage is opposite to the movement direction of the filter surface 50. The ribs 45 on the filter surface 50 are conducive to the attachment of solids and the filter surface 50 carrying the solids to the downstream. At the end of the filter surface 50, due to the action of gravity, the solids fall into the receiving basket 47, achieving the effect of filtering out and collecting the solids.

[0069] In this embodiment, the rural domestic sewage staged treatment device also includes a solar power generation module 46 and a power storage module. The solar power generation module 46 stores electrical energy in the power storage module, which is then connected to the drive motor for power supply. The solar power generation module 46 generates electricity from solar energy, and the power storage module stores this energy and supplies it to the drive motor, effectively utilizing green energy and reducing system operating costs.

[0070] As an optimization of this embodiment, the waste receiving assembly 42 includes a receiving basket 47 with filter holes fixed to the side wall of the first tank body 11. The upper end of the receiving basket 47 is open and docks below and downstream of the filter conveyor assembly 41. A waste cleaning window 48 is defined in the side wall of the first tank body 11, located above the receiving basket 47. The opening and closing of the waste cleaning window 48 is controlled by a window switch assembly. The window switch assembly includes a blocking plate 49 that is fixed to the waste cleaning window 48, and a sealing ring assembly is provided between the blocking plate 49 and the waste cleaning window 48.

[0071] Specifically, a receiving basket 47 is positioned below and downstream of the filter conveyor belt to receive solids conveyed from the filter surface 50. It has filter holes, through which residual sewage on the solids can flow. A waste cleaning window 48 is positioned to accommodate the receiving basket 47. Solid waste collected in the receiving basket 47 can be removed through this window, and the receiving basket 47 can also be loaded and unloaded. A window switch assembly is used to open and close the window to prevent solid waste from escaping. A blocking plate 49 conveniently opens and closes the waste cleaning window 48, resulting in a simple structure and easy operation. Furthermore, a sealing ring assembly is provided in the side seam of the waste cleaning window 48 to further enhance the sealing performance of the window when closed, preventing sewage or odors from escaping.

[0072] As a further optimization of this embodiment, a spare grille 16 is also provided in the first pool body 11. The spare grille 16 is horizontally placed on the first mounting platform on the inner wall of the first pool body 11 and is located between the separation and collection structure 4 and the first water outlet pipe 13. A number of vertically opened grille filter holes are evenly distributed on the spare grille 16.

[0073] Specifically, a spare grille 16 is set in the first pool body 11 to further ensure the filtering effect. Even if solid matter leaks out from the filtering interception of the filtering conveyor belt 44, the spare grille 16 can intercept the solid matter to ensure the smooth progress of subsequent processing. Moreover, the spare grille 16 is placed on the first mounting table, which is a detachable setting for easy loading and unloading and replacement.

[0074] like Figure 1 As shown, the biological purification tank includes a second tank body 21 with an open top and an ecological floating island 22 floating within the second tank body 21. The ecological floating island 22 is planted with floating plants 23 with roots extending into the sewage. Several biological ropes 24 are suspended from the ecological floating island 22, submerged in the sewage. Submerged plants 25 are planted on the bottom of the second tank body 21. A biofilm is formed on the biological ropes 24 to purify the water. A growth matrix 26 is laid on the bottom of the second tank body 21, on which the submerged plants 25 are planted. The outlet of the first outlet pipe 13 of the solids separation tank 1 is connected to the top of the second tank body 21. A second outlet pipe 27 is provided on the side wall of the solids separation tank 1, away from the tank bottom. A second on-off valve 28 is provided on this second outlet pipe 27.

[0075] Specifically, sewage accumulates in the second tank body 21, and the ecological floating island 22 floats on the sewage. The roots of the floating plants 23 planted on it extend into the sewage. A biological rope 24 is also hung on the ecological floating island 22. The biological rope 24 is inoculated with corresponding bacteria and algae, and the bacteria and algae form a biofilm on the biological rope 24. In addition, submerged plants 25 are planted at the bottom of the tank. Under the synergistic effect of the three, the sewage can be purified efficiently and environmentally friendly. The growth matrix 26 is laid on the bottom of the second tank body 21 to ensure the smooth growth of the submerged plants 25. The solid separation tank 1 outputs the ecologically treated sewage through the second outlet pipe 27. A second switch valve 28 is provided in the second outlet pipe 27. By opening and closing the outlet channel at the appropriate time, it is ensured that the sewage stays in the ecological purification tank for a sufficient time.

[0076] like Figure 1 As shown, the filtration output pool 3 includes a third pool body 31 and a multi-stage filtration layer 32 and a reverse osmosis membrane layer 33 arranged in the third pool body 31 from top to bottom. The multi-stage filtration layer 32 includes a PP cotton filter mesh layer, a granular activated carbon layer and a compressed activated carbon layer from top to bottom. A wastewater output pipe 34 and a clean water output pipe 35 are connected to the side wall of the third pool body 31. The wastewater output pipe 34 is located between the multi-stage filtration layer 32 and the reverse osmosis membrane layer 33. The clean water output pipe 35 is located below the reverse osmosis membrane layer 33 and away from the bottom of the pool. A wastewater switch valve 36 and a clean water switch valve 37 are respectively provided on the wastewater output pipe 34 and the clean water output pipe 35.

[0077] Specifically, after entering the third tank 31, the wastewater passes through a multi-stage filtration layer 32 and a reverse osmosis membrane layer 33. The multi-stage filtration layer 32 is used to filter out relatively large solids, while the reverse osmosis membrane layer 33 is used to filter out very small solids. The liquid filtered by the reverse osmosis membrane layer 33 is clean water, which is of high quality and can meet daily needs. The wastewater that does not pass through the reverse osmosis membrane layer 33 is of relatively low quality and can be used for applications such as irrigation. To meet the pressure requirements of the reverse osmosis process, a pressure pump is also installed in the third tank 31.

[0078] As an optimization of this embodiment, the device further includes a water quality detection assembly, which includes at least a first detection terminal 61 for detecting the quality of wastewater in the water storage chamber, a wastewater detection terminal 62 for detecting the quality of wastewater, and a clean water detection terminal 63 for detecting the quality of clean water. The first detection terminal 61 is located upstream of the second on-off valve 28 and extends into the second water outlet pipe 27; the wastewater detection terminal 62 is located upstream of the wastewater on-off valve 36 and extends into the wastewater output pipe 34; and the clean water detection terminal 63 is located upstream of the clean water on-off valve 37 and extends into the clean water output pipe 35.

[0079] Specifically, the water quality detection component is used to detect the water quality of each node in real time, and to open and close the corresponding switch valves according to the specific water quality conditions of the relevant points. It can also be used to monitor the failure of related equipment.

[0080] In this embodiment, the positions of the solid separation tank 1, the biological purification tank 2 and the filter output tank 3 are arranged in a stepped descending manner, so that the sewage can be transported downward by gravity, saving the operating cost of the system.

[0081] Specific working principle: The sewage to be treated is input from the sewage input pipe 12, and after passing through the filtering surface 50, a certain volume of solid matter is filtered out and remains on the filtering surface 50, and is transported upward with the rotation of the filtering conveyor belt 44, and finally falls into the receiving basket 47 at the end of the conveyor belt. The liquid flows out downward, passes through the spare grid 16 again, and then enters the sedimentation area 15 below for sedimentation. The supernatant is output from the first outlet pipe 13 and enters the second tank body 21.

[0082] In the second tank body 21 , the sewage is purified by the combined action of the floating plants 23 , the submerged plants 25 and the algae biofilm on the biological rope 24 . After a certain treatment time, the second switch valve 28 of the second output pipe is opened, and the sewage enters the third tank body 31 .

[0083] In the third tank body 31, the sewage passes through the PP cotton filter layer, the granular activated carbon layer and the compressed activated carbon layer in turn and gathers above the reverse osmosis membrane layer 33. At this time, the second switch valve 28 and the wastewater switch valve 36 are closed, and the pressure pump therein works to accelerate the reverse osmosis treatment of the reverse osmosis membrane layer 33. The generated clean water is output from the clean water output pipe 35 below. After the reverse osmosis is completed, the wastewater switch valve 36 is opened, and the wastewater remaining above is output from the wastewater output pipe 34.

[0084] A purification process is thus completed.

[0085] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A rural domestic sewage classification treatment device, characterized in that: include: A solid separation tank (1), wherein the solid separation tank (1) is provided with a separation and collection structure (4) for separating and collecting solids in sewage; A biological purification pool (2), wherein a biological water treatment module is provided in a water storage chamber of the biological purification pool (2) for purifying water; A filter output tank (3), which is used to perform multi-stage filtration on the sewage and output the residual wastewater and the filtered clean water respectively; The solid separation tank (1), the biological purification tank (2) and the filtration output tank (3) are connected in sequence through pipelines.

2. The rural domestic sewage staged treatment device according to claim 1, characterized in that: The solid separation tank (1) comprises a square first tank body (11), a sewage inlet pipe (12) is provided at the upper portion of the first tank body, a first outlet pipe (13) is provided at the lower portion of the first tank body, and the separation and collection structure (4) is provided between the sewage inlet pipe (12) and the first outlet pipe (13).

3. The rural domestic sewage staged treatment device according to claim 2, characterized in that: The separation and collection structure (4) comprises a filter conveyor belt assembly (41) and a waste receiving assembly (42) arranged in the first tank body (11), and the waste receiving assembly (42) is docked below the downstream of the filter conveyor belt assembly (41).

4. The rural domestic sewage staged treatment device according to claim 3, characterized in that: The filter conveyor belt assembly (41) includes at least two rollers (43) rotatably connected to the side wall of the first tank body (11) and a filter conveyor belt (44) wound around the rollers (43). The upper end of the filter conveyor belt (44) forms a filter surface (50). A drive motor is connected to at least one of the rollers (43) for driving the filter conveyor belt (44) to move so as to convey the filtered solid matter to the waste receiving assembly (42).

5. The rural domestic sewage staged treatment device according to claim 3, characterized in that: The waste receiving assembly (42) includes a receiving basket (47) with filter holes fixed on the side wall of the first tank body (11), and the upper opening of the receiving basket (47) is open and docked below the downstream of the filter conveyor assembly (41); A waste cleaning window (48) is provided on the side wall of the first tank body (11). The waste cleaning window (48) is located above the material receiving basket (47). The opening and closing of the waste cleaning window (48) is controlled by a window switch assembly.

6. The rural domestic sewage staged treatment device according to claim 2, characterized in that: A spare grille (16) is further provided in the first tank body (11). The spare grille (16) is horizontally placed on a first mounting platform on the inner wall of the first tank body (11) and is located between the separation and collection structure (4) and the first water outlet pipe (13). A plurality of vertically opened grille filter holes are evenly distributed on the spare grille (16).

7. The rural domestic sewage staged treatment device according to claim 1, characterized in that: The biological purification pool (2) includes a second pool body (21) with an open top and an ecological floating island (22) floating in the second pool body (21), wherein the ecological floating island (22) is planted with floating plants (23) whose roots extend into the sewage, and / or the ecological floating island (22) is hung with a plurality of biological ropes (24) immersed in the sewage, and / or the bottom of the second pool body (21) is planted with submerged plants (25).

8. The rural domestic sewage staged treatment device according to claim 7, characterized in that: The water outlet of the first water outlet pipe (13) of the solid separation tank (1) is connected to the upper opening of the second tank body (21), and a second water outlet pipe (27) is provided on the side wall of the solid separation tank (1) away from the tank bottom, and a second switch valve (28) is provided on the second water outlet pipe (27).

9. The rural domestic sewage staged treatment device according to claim 1, characterized in that: The filter output pool (3) comprises a third pool body (31) and a multi-stage filter layer (32) and a reverse osmosis membrane layer (33) arranged in the third pool body (31) from top to bottom. A wastewater output pipe (34) and a clean water output pipe (35) are connected to the side wall of the third pool body (31). The wastewater output pipe (34) is located between the multi-stage filter layer (32) and the reverse osmosis membrane layer (33). The clean water output pipe (35) is located below the reverse osmosis membrane layer (33) and away from the pool bottom. A wastewater switch valve (36) and a clean water switch valve (37) are respectively provided on the wastewater output pipe (34) and the clean water output pipe (35).

10. The rural domestic sewage staged treatment device according to any one of claims 1 to 9, characterized in that: The device further comprises a water quality detection component, wherein the water quality detection component comprises at least a first detection end (61) for detecting the quality of sewage in the water storage chamber, a wastewater detection end (62) for detecting the quality of wastewater, and a clean water detection end (63) for detecting the quality of clean water.

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