CN210438574U - Rural area domestic sewage full anaerobic digestion handles returns field device - Google Patents

Abstract

The utility model discloses a rural area domestic sewage anaerobism digestion treatment returns field device, including sewage treatment mechanism, sewage treatment mechanism includes one-level anaerobic chamber, second grade anaerobic chamber, and clarification chamber, one side fixedly connected with second grade anaerobic chamber of one-level anaerobic chamber, the inside of second grade anaerobic chamber is provided with second grade anaerobism mud and fills the storehouse, one side fixedly connected with of second grade anaerobic chamber, the opposite side of one-level anaerobic chamber is provided with both sides sealed apron, both sides sealed apron and one-level anaerobic chamber pass through bolt fixed connection, it fills the storehouse to be provided with the adsorbent in the clarification chamber, and one side of clarification chamber also is provided with both sides sealed apron, both sides sealed apron and clarification chamber pass through bolt fixed connection. The utility model has the characteristics of rational in infrastructure, convenient to use, through setting up tertiary filter mechanism can high efficiency become domestic sewage into the water that can normally use to can effectual reduction domestic sewage pollution to the environment.

Description

Rural area domestic sewage full anaerobic digestion handles returns field device

Technical Field

The utility model relates to the technical field of sewage treatment equipment, in particular to a rural domestic sewage full anaerobic digestion treatment field returning device.

Background

Domestic sewage is wastewater discharged in daily life of residents and mainly comes from residential buildings and public buildings, pollutants contained in the domestic sewage are mainly organic matters and a large number of pathogenic microorganisms, and the organic matters in the domestic sewage are extremely unstable and are easy to decay to generate stink. Bacteria and pathogens are proliferated in a large amount by taking organic matters in the domestic sewage as nutrients, which leads to epidemic spread of infectious diseases, so that the domestic sewage must be treated before being discharged.

The applicant of the utility model finds that domestic sewage treatment equipment is not arranged in most rural areas in China, so that domestic used water can be directly discharged to the land or the farmland, and domestic sewage can influence the quality of soil, thereby influencing the normal growth of crops, and therefore a sewage treatment device suitable for rural life is urgently needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rural domestic sewage is anaerobism digestion entirely and is handled and return field device aims at improving rural domestic sewage and does not directly discharge the farmland through handling, causes the harm to the quality of soil, leads to influencing the problem of crops normal growth.

The utility model discloses a realize like this:

a rural domestic sewage full anaerobic digestion treatment field returning device comprises a sewage treatment mechanism, wherein the sewage treatment mechanism comprises a primary anaerobic chamber, a secondary anaerobic chamber and a clarification chamber, one side of the primary anaerobic chamber is fixedly connected with the secondary anaerobic chamber, a secondary anaerobic sludge filling bin is arranged inside the secondary anaerobic chamber, one side of the secondary anaerobic chamber is fixedly connected with the primary anaerobic chamber, the other side of the primary anaerobic chamber is provided with two side sealing cover plates, the two side sealing cover plates are fixedly connected with the primary anaerobic chamber through bolts, an adsorbent filling bin is arranged inside the clarification chamber, one side of the clarification chamber is also provided with two side sealing cover plates, the two side sealing cover plates are fixedly connected with the clarification chamber through bolts, water pipes are arranged on the two side sealing cover plates, the water pipes are fixed on the side surfaces of the two side sealing cover plates through welding, a primary anaerobic sludge layer filling bin is arranged inside the primary anaerobic chamber, and the top of one-level anaerobic chamber is provided with rabbling mechanism installation passageway, be provided with the rabbling mechanism in the rabbling mechanism installation passageway, the top of one-level anaerobic chamber still is provided with the desilting pipe, the desilting pipe runs through the top surface of one-level anaerobic chamber, and the top of desilting pipe runs through and sets up desilting mechanism installing port, fixedly connected with desilting mechanism in the desilting mechanism installing port, the structure of one-level anaerobic chamber and second grade anaerobic chamber is the same, and the inside all fixed joint in one end of one-level anaerobic chamber and second grade anaerobic chamber has the filtration piece, it includes silt baffle and filter screen to filter the piece, silt baffle and filter screen are the integrated into one piece structure.

Further, rabbling mechanism includes first driving motor, first bull stick and stirring tooth, first bull stick fixed connection is on first driving motor's output shaft, stir the one end of tooth fixed connection at first bull stick, the first fixing base of first driving motor's bottom fixedly connected with, the first sealing washer of bottom fixedly connected with of first fixing base, it is in the same place with domestic sewage blending in order to let the anaerobe can be abundant through setting up rabbling mechanism, thereby can decompose the organic matter in the domestic sewage by the efficient rapidly, prevent that domestic sewage from flowing into in the farmland, lead to the water in the farmland to appear eutrophication phenomenon.

Furthermore, the dredging mechanism comprises a second driving motor, an auger shaft and an auger blade, the auger shaft is fixed on an output shaft of the second driving motor, the auger blade is arranged at the outer side of the auger shaft, the auger blade and the auger shaft are fixedly connected by welding, a water blocking part is arranged at the edge of the auger blade, the water blocking part and the auger blade are of an integrally formed structure, drain holes are formed in the auger blade in a penetrating manner and are uniformly distributed on the auger blade, a second fixed seat is fixedly connected to the bottom of the second driving motor, a second sealing ring is fixedly connected to the bottom of the second fixed seat, the dredging mechanism is arranged to remove impurities remained in filtered sewage, sludge can be conveyed out in a precession manner by arranging the auger, the water blocking part is arranged at the edge of the auger blade to prevent the sludge from sliding off the auger blade in the upward conveying process, the drain hole is formed in the auger blade in a penetrating mode so as to prevent untreated domestic sewage from being brought out by the auger blade, and the drain hole formed in the auger blade can effectively prevent the situation.

Further, the side of desilting pipe is provided with out the silt pipe, go out silt pipe and desilting pipe fixed connection, it is provided with control valve on the silt pipe to go out, be provided with out the silt pipe through the side at the desilting pipe, its purpose can be received the mud of discharging conveniently for when mud is cleared up out, and be provided with control valve on going out the silt pipe, be in order to prevent that external air from entering into the cabin body through control valve, thereby influence the living environment of anaerobe, lead to the unable normal organic matter that decomposes the domestic sewage of anaerobe.

Further, the bottom symmetry of desilting pipe is provided with the support column, the equidistant distribution in the bottom of desilting pipe in the axle center of desilting pipe is surrounded to the support column, and support column and desilting pipe fixed connection, bottom symmetry through managing at the desilting is provided with the support column, the purpose that sets up the support column is in order to consolidate the bottom of desilting pipe, prevent that desilting mechanism from leading to the desilting pipe to take place to rock in work, and with the equidistant distribution in the bottom of desilting pipe of support column, be in order to let silt can enter into the bottom of desilting pipe, thereby can let silt go out through desilting pipe by desilting mechanism clearance.

Further, the symmetry is provided with the support base on the side of one-level anaerobic chamber, supports the base and passes through welded fastening in the side of one-level anaerobic chamber, and it is right to be provided with the support base through the symmetry on the side of one-level anaerobic chamber the utility model discloses play the effect of a support.

Further, one side of both sides sealed cover plate is provided with waterproof sealing adhesive tape, and waterproof sealing adhesive tape and both sides sealed cover plate are connected through gluing, and waterproof sealing adhesive tape's material sets up to the rubber material, is in order to let through setting up sealed cover plate the utility model discloses a sealed effect is better, and the later stage of also being convenient for simultaneously is right the utility model discloses clear up and overhaul.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the characteristics of rational in infrastructure, convenient to use, through setting up tertiary filter mechanism can high efficiency become domestic sewage into the water that can normally use to can effectual reduction domestic sewage pollution to the environment.

(1) The utility model discloses a be provided with rabbling mechanism in rabbling mechanism installation passageway, rabbling mechanism includes a driving motor, first bull stick and stirring tooth, first bull stick fixed connection is on a driving motor's output shaft, stir the one end of tooth fixed connection at first bull stick, the first fixing base of a driving motor's bottom fixedly connected with, the first sealing washer of bottom fixedly connected with of first fixing base, it is in the same place with domestic sewage thoughtlessly in order to let anaerobe can be abundant through setting up rabbling mechanism, thereby can decompose the organic matter in the domestic sewage by the efficient rapidly, prevent that domestic sewage from flowing into in the farmland, the eutrophication phenomenon appears in the water that leads to in the farmland.

(2) The utility model discloses a top at one-level anaerobic chamber still is provided with the desilting pipe, the desilting pipe runs through the top surface of one-level anaerobic chamber, the side of desilting pipe is provided with the desilting pipe, go out desilting pipe and desilting pipe fixed connection, be provided with control flap on the desilting pipe, be provided with out the desilting pipe through the side at the desilting pipe, its purpose can receive the silt of discharge with the convenience when silt is cleared up out, and be provided with control flap on going out the desilting pipe, it enters into the cabin body in order to prevent external air through control flap, thereby influence the living environment of anaerobe, lead to the organic matter of the unable normal decomposition life sewage of anaerobe.

(3) The utility model fixes the auger shaft on the output shaft of the second driving motor, the auger blade is arranged outside the auger shaft, the auger blade and the auger shaft are fixedly connected by welding, the edge of the auger blade is provided with the water blocking part, the water blocking part and the auger blade are of an integrated structure, the auger blade is provided with the water drainage holes through the water drainage holes, the water drainage holes are uniformly distributed on the auger blade, the bottom of the second driving motor is fixedly connected with the second fixed seat, the bottom of the second fixed seat is fixedly connected with the second sealing ring, the dredging mechanism is arranged to remove the impurities remained in the filtered sewage, the auger can convey the sludge by screwing in, the water blocking part is arranged at the edge of the auger blade to prevent the sludge from sliding off the auger blade in the upward conveying process, the drain hole is formed in the auger blade in a penetrating mode so as to prevent untreated domestic sewage from being brought out by the auger blade, and the drain hole formed in the auger blade can effectively prevent the situation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a rural domestic sewage total anaerobic digestion treatment field returning device of the utility model;

FIG. 2 is a schematic view of a split structure of the rural domestic sewage total anaerobic digestion treatment field returning device of the utility model;

FIG. 3 is a top view of the rural domestic sewage total anaerobic digestion treatment field returning device of the utility model;

FIG. 4 is a sectional view taken along the line A-A in FIG. 3;

FIG. 5 is a first schematic structural view of a first-stage anaerobic chamber of the rural domestic sewage total anaerobic digestion treatment field returning device of the utility model;

FIG. 6 is a schematic structural view of a first-stage anaerobic chamber of the rural domestic sewage total anaerobic digestion treatment field returning device of the utility model;

FIG. 7 is a schematic structural view of a stirring mechanism of the rural domestic sewage total anaerobic digestion treatment field returning device of the utility model;

FIG. 8 is a first structural schematic view of a dredging mechanism of a rural domestic sewage total anaerobic digestion treatment field returning device of the utility model;

FIG. 9 is a schematic structural diagram II of a dredging mechanism of a rural domestic sewage total anaerobic digestion treatment field returning device of the utility model.

In the figure: 1. a primary anaerobic chamber; 11. a first-stage anaerobic sludge layer filling bin; 12. a support base; 13. dredging the pipe; 131. a support pillar; 132. a control valve; 133. a dredging mechanism mounting port; 134. a sludge outlet pipe; 14. the stirring mechanism is provided with a channel; 15. a filter member; 151. a sludge baffle; 152. filtering with a screen; 2. a secondary anaerobic chamber; 21. filling a bin with secondary anaerobic bacteria sludge; 3. a clarification chamber; 31. an adsorbent filling bin; 4. a sewage treatment mechanism; 5. sealing cover plates at two sides; 51. waterproof sealing rubber strips; 6. a water pipe; 7. a stirring mechanism; 71. a first drive motor; 711. a first fixed seat; 712. a first seal ring; 72. a first rotating lever; 73. stirring teeth; 8. a dredging mechanism; 81. a second drive motor; 811. a second fixed seat; 812. a second seal ring; 82. a packing auger shaft; 83. a screw blade; 831. a water blocking member; 832. and (4) hydrophobic pores.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented 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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, 2, 3, 4, 5, 6, 7, 8 and 9, a rural domestic sewage total anaerobic digestion treatment field returning device comprises a sewage treatment mechanism 4, wherein the sewage treatment mechanism 4 comprises a primary anaerobic chamber 1, a secondary anaerobic chamber 2 and a clarification chamber 3, one side of the primary anaerobic chamber 1 is fixedly connected with the secondary anaerobic chamber 2, a secondary anaerobic sludge filling bin 21 is arranged inside the secondary anaerobic chamber 2, one side of the secondary anaerobic chamber 2 is fixedly connected with the clarification chamber 3, the other side of the primary anaerobic chamber 1 is provided with two side sealing cover plates 5, the two side sealing cover plates 5 and the primary anaerobic chamber 1 are fixedly connected through bolts, an adsorbent filling bin 31 is arranged in the clarification chamber 3, one side of the clarification chamber 3 is also provided with the two side sealing cover plates 5, one side of the two side sealing cover plates 5 is provided with a waterproof sealing rubber strip 51, the waterproof sealing rubber strip 51 is connected with the two side sealing cover plates 5 through gluing, the waterproof sealing rubber strip 51 is made of rubber, and the sealing cover plate 5 is arranged to ensure that the sealing effect of the utility model is better, and the utility model can be cleaned and maintained conveniently at the later stage; the two-side sealing cover plate 5 and the clarification chamber 3 are fixedly connected through bolts, the two-side sealing cover plate 5 is provided with a water pipe 6, the water pipe 6 is fixed on the side surface of the two-side sealing cover plate 5 through welding, the inside of the first-stage anaerobic chamber 1 is provided with a first-stage anaerobic sludge blanket filling bin 11, the top of the first-stage anaerobic chamber 1 is provided with a stirring mechanism mounting channel 14, a stirring mechanism 7 is arranged in the stirring mechanism mounting channel 14, the stirring mechanism 7 comprises a first driving motor 71, a first rotating rod 72 and stirring teeth 73, the first rotating rod 72 is fixedly connected on an output shaft of the first driving motor 71, the stirring teeth 73 are fixedly connected at one end of the first rotating rod 72, the bottom of the first driving motor 71 is fixedly connected with a first fixing seat 711, the bottom of the first fixing seat 711 is fixedly connected with a first sealing ring 712, and the stirring mechanism 7 is arranged to enable anaerobic bacteria to be fully mixed with domestic, therefore, the organic matters in the domestic sewage can be rapidly and efficiently decomposed, and the domestic sewage is prevented from flowing into the farmland, so that the water in the farmland is prevented from being eutrophicated.

Referring to fig. 3, 4, 5, 6, 7, 8 and 9, a dredging pipe 13 is further disposed at the top of the primary anaerobic chamber 1, the dredging pipe 13 penetrates through the top surface of the primary anaerobic chamber 1, a dredging pipe 134 is disposed at a side surface of the dredging pipe 13, the dredging pipe 134 is fixedly connected to the dredging pipe 13, a control valve 132 is disposed on the dredging pipe 134, and the dredging pipe 134 is disposed at a side surface of the dredging pipe 13, so that the discharged sludge can be conveniently received when the sludge is cleared, and the control valve 132 is disposed on the dredging pipe 134, so that external air can be prevented from entering the cabin through the control valve 132, thereby affecting the living environment of anaerobic bacteria, and causing the anaerobic bacteria to not normally decompose organic matters in the domestic sewage; the bottom of the dredging pipe 13 is symmetrically provided with support columns 131, the support columns 131 are distributed at the bottom of the dredging pipe 13 at equal intervals around the axis of the dredging pipe 13, the support columns 131 are fixedly connected with the dredging pipe 13, the support columns 131 are symmetrically arranged at the bottom of the dredging pipe 13, the support columns 131 are arranged to reinforce the bottom of the dredging pipe 13 and prevent the dredging pipe 13 from shaking when the dredging mechanism 8 works, and the support columns 131 are distributed at the bottom of the dredging pipe 13 at equal intervals to enable sludge to enter the bottom of the dredging pipe 13, so that the sludge can be cleared out by the dredging mechanism 8 through the dredging pipe 13; the top of the dredging pipe 13 is provided with a dredging mechanism mounting opening 133 in a penetrating way, the dredging mechanism mounting opening 133 is internally and fixedly connected with a dredging mechanism 8, the dredging mechanism 8 comprises a second driving motor 81, an auger shaft 82 and an auger blade 83, the auger shaft 82 is fixed on the output shaft of the second driving motor 81, the auger blade 83 is arranged at the outer side of the auger shaft 82, the auger blade 83 and the auger shaft 82 are fixedly connected by welding, the edge of the auger blade 83 is provided with a water blocking part 831, the water blocking part 831 and the auger blade 83 are of an integrated structure, a water drainage hole 832 is arranged on the auger blade 83 in a penetrating way, the water drainage hole 832 is uniformly distributed on the auger blade 83, the bottom of the second driving motor 81 is fixedly connected with a second fixing seat 811, the bottom of the second fixing seat 811 is fixedly connected with a second sealing ring 812, the dredging mechanism 8 is arranged to remove the impurities remained in the filtered sewage, the sludge can be conveyed out in a screwing mode by arranging the auger, the water blocking piece 831 is arranged at the edge of the auger blade 83 to prevent the sludge from sliding off the auger blade in the upward conveying process, the water drainage hole 832 is formed in the auger blade 83 in a penetrating way to prevent untreated domestic sewage from being brought out by the auger blade 83, and the water drainage hole 832 arranged in the auger blade 83 can effectively prevent the situation; the structure of one-level anaerobic chamber 1 and second grade anaerobic chamber 2 is the same, and the inside equal fixed joint in one end of one-level anaerobic chamber 1 and second grade anaerobic chamber 2 has a filtration piece 15, it includes silt baffle 151 and filter screen 152 to filter piece 15, silt baffle 151 and filter screen 152 are integrated into one piece structure, the symmetry is provided with support base 12 on the side of one-level anaerobic chamber 1, support base 12 passes through welded fastening in the side of one-level anaerobic chamber 1, it is right for being provided with support base 12 through the symmetry on the side of one-level anaerobic chamber 1 the utility model discloses play the effect of a support.

The utility model discloses a theory of operation: when the utility model is used for treating domestic sewage, firstly, the water pipe 6 on one side of the first-level anaerobic chamber 1 is connected with the water inlet pipe, anaerobic bacteria biological fillers can be filled in the first-level anaerobic bacteria sludge blanket filling bin 11, anaerobic bacteria biological fillers with different specifications can be filled in the second-level anaerobic bacteria sludge filling bin 21 according to different filtering requirements, domestic sewage can firstly enter the first-level anaerobic bacteria sludge blanket filling bin 11 from the water pipe 6, then the stirring mechanism 7 is started to fully mix the sewage with the anaerobic bacteria biological fillers in the first-level anaerobic bacteria sludge blanket filling bin 11, then the sewage can enter the second-level anaerobic bacteria sludge filling bin 21 through the filter screen 152, impurities in the sewage can be blocked in the first-level anaerobic bacteria sludge blanket filling bin 11 by the filter piece 15, and the sewage can be purified again in the second-level anaerobic bacteria sludge filling bin 21, then the sewage after purification can enter into the adsorbent filling bin 31, impurities in the water in the adsorbent filling bin 31 can be filtered again by the adsorbent filled in the adsorbent filling bin 31, finally the purified water can be discharged through the water pipe 6 on one side of the clarifying chamber 3 and flows into the field, and when the impurities in the first-stage anaerobic bacteria sludge layer filling bin 11 and the second-stage anaerobic bacteria sludge filling bin 21 need to be cleaned, the impurities can be discharged only by opening the second driving motor 81 and the control valve 132.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a rural area domestic sewage is anaerobism digestion entirely and is handled and return field device, includes sewage treatment mechanism (4), sewage treatment mechanism (4) include one-level anaerobic room (1), second grade anaerobic room (2) and clarification room (3), one side fixedly connected with second grade anaerobic room (2) of one-level anaerobic room (1), the inside of second grade anaerobic room (2) is provided with second grade anaerobism mud and fills storehouse (21), one side fixedly connected with clarification room (3) of second grade anaerobic room (2), its characterized in that: the anaerobic fermentation device is characterized in that two side sealing cover plates (5) are arranged on the other side of the first-stage anaerobic chamber (1), the two side sealing cover plates (5) are fixedly connected with the first-stage anaerobic chamber (1) through bolts, an adsorbent filling bin (31) is arranged in the clarification chamber (3), one side of the clarification chamber (3) is also provided with the two side sealing cover plates (5), the two side sealing cover plates (5) are fixedly connected with the clarification chamber (3) through bolts, a water pipe (6) is arranged on the two side sealing cover plates (5), the water pipe (6) is fixedly welded on the side surfaces of the two side sealing cover plates (5), a first-stage anaerobic sludge layer filling bin (11) is arranged inside the first-stage anaerobic chamber (1), a stirring mechanism mounting channel (14) is arranged at the top of the first-stage anaerobic chamber (1), and a stirring mechanism (7) is arranged in the stirring mechanism mounting channel (14, the top of one-level anaerobic chamber (1) still is provided with desilting pipe (13), desilting pipe (13) run through the top surface of one-level anaerobic chamber (1), and the top of desilting pipe (13) runs through and sets up desilting mechanism installing port (133), fixedly connected with desilting mechanism (8) in desilting mechanism installing port (133), the structure of one-level anaerobic chamber (1) and second grade anaerobic chamber (2) is the same, and the inside all fixed joint of one end of one-level anaerobic chamber (1) and second grade anaerobic chamber (2) has filtration piece (15), it includes silt baffle (151) and filter screen (152) to filter piece (15), silt baffle (151) and filter screen (152) are the integrated into one piece structure.

2. The rural domestic sewage total anaerobic digestion treatment field returning device according to claim 1, wherein the stirring mechanism (7) comprises a first driving motor (71), a first rotating rod (72) and stirring teeth (73), the first rotating rod (72) is fixedly connected to an output shaft of the first driving motor (71), the stirring teeth (73) are fixedly connected to one end of the first rotating rod (72), a first fixing seat (711) is fixedly connected to the bottom of the first driving motor (71), and a first sealing ring (712) is fixedly connected to the bottom of the first fixing seat (711).

3. The rural domestic sewage full anaerobic digestion of claim 2 is handled and is returned field device, characterized in that, desilting mechanism (8) includes second driving motor (81), auger shaft (82) and auger blade (83), auger shaft (82) are fixed on the output shaft of second driving motor (81), auger blade (83) set up in the outside of auger shaft (82), and auger blade (83) and auger shaft (82) pass through welded fastening and are connected, the edge of auger blade (83) is provided with water blocking spare (831), water blocking spare (831) and auger blade (83) are the integrated into one piece structure, drain hole (832) have been run through on auger blade (83), drain hole (832) evenly distributed is on auger blade (83), the bottom fixedly connected with second fixing base (811) of second driving motor (81), the bottom of the second fixed seat (811) is fixedly connected with a second sealing ring (812).

4. The rural domestic sewage total anaerobic digestion treatment field returning device according to claim 3, wherein a dredging pipe (134) is arranged on the side surface of the dredging pipe (13), the dredging pipe (134) is fixedly connected with the dredging pipe (13), and a control valve (132) is arranged on the dredging pipe (134).

5. The rural domestic sewage total anaerobic digestion treatment field returning device according to claim 4, wherein the bottom of the dredging pipe (13) is symmetrically provided with supporting columns (131), the supporting columns (131) are distributed at the bottom of the dredging pipe (13) at equal intervals around the axis of the dredging pipe (13), and the supporting columns (131) are fixedly connected with the dredging pipe (13).

6. The rural domestic sewage total anaerobic digestion treatment field returning device according to claim 5, wherein the side surface of the primary anaerobic chamber (1) is symmetrically provided with support bases (12), and the support bases (12) are fixed on the side surface of the primary anaerobic chamber (1) through welding.

7. The rural domestic sewage total anaerobic digestion treatment field returning device according to claim 6, wherein one side of the two side sealing cover plates (5) is provided with a waterproof sealing rubber strip (51), the waterproof sealing rubber strip (51) and the two side sealing cover plates (5) are connected by gluing, and the waterproof sealing rubber strip (51) is made of rubber.

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