Multi-stage micro-powered self-reflow sewage treatment reactor

Abstract

The invention discloses a micro-powered self-reflow sewage treatment reactor, comprising a reactor body, wherein the reactor body divides the inner cavity into a primary and a secondary reaction zone by a partition plate, a first water passage is formed between the lower end of the partition plate and the reactor body, a primary and a secondary hydraulic circulation structure are arranged in the primary and secondary reaction zones, a first power assembly is arranged between the lower surface of the primary reaction zone located at the right part below the primary hydraulic circulation structure and the partition plate, a second power assembly is arranged between the lower surface of the secondary reaction zone located at the right part below the secondary hydraulic circulation structure and the right side plate of the reactor body, a water inlet is arranged on the left side wall of the reactor body, a segmented water inlet is arranged on the reactor body located at the secondary reaction zone, a solid-liquid separation clarification zone is arranged above the secondary water circulation structure, a water collecting tank and a water weir are arranged therein, and the water collecting tank and the water weir are connected to the outside of the reactor body through a water outlet pipe. The invention saves energy, reduces equipment capacity, simplifies operation, and saves floor space, equipment cost and operating cost.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, in particular to a multi-stage micro-powered self-return sewage treatment reactor for treating sewage and waste water. Background Art

[0002] A 2 The A / O method is the abbreviation of the Anaerobic / Anoxic / Oxic process. This method achieves the effect of removing nitrogen and phosphorus while removing organic pollutants by adding an anaerobic biological treatment process in front of the conventional anoxic / aerobic biological treatment system. The anaerobic biochemical section acts as a biological selector. Polyphosphate-accumulating bacteria release phosphorus to obtain energy under anaerobic conditions, creating conditions for aerobic phosphorus absorption; in the aerobic biochemical section, microorganisms oxidize and decompose organic matter in sewage and wastewater under conditions of sufficient dissolved oxygen and simultaneously carry out nitrification and polyphosphate reactions, and phosphorus removal is achieved by discharging residual activated sludge; in the anoxic biochemical section, a part of the mixed liquor refluxed from the aerobic section is mixed with the raw water entering the system, and the nitrified liquid in the reflux mixed liquor is used by denitrifying bacteria to carry out denitrification reactions, achieving the purpose of denitrification by releasing nitrogen gas. Therefore, A 2 The / O process must have a mixed liquor return system and a sludge return system in the aerobic biochemical section and the anoxic biochemical section.

[0003] Generally speaking, increasing the reflux ratio can improve the effect of nitrogen removal and phosphorus removal. 2 The above characteristics and good economic efficiency of the A / O process have made it a relatively mature biochemical water treatment method and has been widely used in urban sewage and industrial wastewater treatment. However, the disadvantages of this process are: the return of mixed liquor and sludge requires the installation of power equipment such as a return pump, which increases power consumption. At the same time, in order to fully mix the return sludge and mixed liquor in the anaerobic and anoxic sections with the influent, it is also necessary to install power equipment such as a mixer and a flow-pushing device, which also increases power consumption. In addition, the existing solid-liquid separation and clarification area is in the A 2 The / O reactor is independently arranged outside the vessel, which occupies a large area and has a high construction investment.

[0004] From A 2 From the overall development of the / O process, it is currently moving towards making full use of the biochemical denitrification and phosphorus removal mechanism to further improve water treatment effects, save energy, reduce land occupation and construction funds, and develop in a simple and low-cost operation mode.

[0005] Therefore, how to design a multi-stage micro-powered self-recirculation sewage treatment reactor that can fully utilize the biochemical denitrification and phosphorus removal mechanism, further improve water treatment effects, save energy, reduce land occupation and construction funds, and is simple and low-cost is a topic that the inventors have devoted themselves to studying. Summary of the invention

[0006] The purpose of the present invention is to provide a multi-stage micro-power self-reflow sewage treatment reactor, which can reflux the mixed liquid without applying external force equipment, save equipment cost, energy consumption and operating costs, save floor space, simplify operation, can achieve efficient nitrogen and phosphorus removal, improve effluent water quality, and effectively improve A 2 The economy and applicability of / O process.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a micro-powered self-reflow sewage treatment reactor, which includes a hollow reactor body, the reactor body divides the inner cavity into a primary reaction zone and a secondary reaction zone by a partition plate arranged on the upper wall of the inner cavity, a first water passage is formed between the lower end of the partition plate and the reactor body, a primary hydraulic circulation structure and a secondary hydraulic circulation structure are respectively arranged in the primary reaction zone and the secondary reaction zone, a first power component is arranged between the right part of the lower surface of the primary reaction zone located below the primary hydraulic circulation structure and the partition plate, a second power component is arranged between the right part of the lower surface of the secondary reaction zone located below the secondary hydraulic circulation structure and the right side plate of the reactor body, a water inlet is arranged on the left side wall of the reactor body, a segmented water inlet is arranged on the wall of the reactor body located in the secondary reaction zone, a solid-liquid separation clarification zone is arranged above the secondary water circulation structure, a water collecting tank and a water weir are arranged in the solid-liquid separation clarification zone, and the water collecting tank and the water weir are connected to the outside of the reactor body through a water outlet pipe.

[0008] The present invention provides a micro-powered self-recirculating sewage treatment reactor, wherein the primary hydraulic circulation structure comprises a first guide plate vertically arranged on the upper wall of the primary reaction zone and a second guide plate located below the first guide plate, the second guide plate comprises a third guide plate arranged horizontally and a fifth guide plate arranged obliquely to the upper right, the third guide plate and the fifth guide plate are smoothly transitionally connected by an arc-shaped fourth guide plate, the third guide plate is located directly below the first guide plate, a second water passage is formed between the third guide plate and the first guide plate, a third water passage is formed between the third guide plate and the lower wall of the reactor body, an anaerobic zone is formed between the left area of ​​the first guide plate and the third guide plate and the lower part of the inner cavity of the reactor body, a fourth water passage is formed between the fifth guide plate and the upper wall of the reactor body, a first anoxic zone is formed between the first guide plate and the upper part of the fifth guide plate, the first power assembly is arranged below the fifth guide plate, and the fifth guide plate, the partition plate and the first power assembly work together to form a first gas-lift aerobic zone.

[0009] The micro-powered self-recirculating sewage treatment reactor of the present invention, wherein the first power component comprises a first microporous aerator group composed of a plurality of microporous aerators arranged at intervals.

[0010] In the micro-powered self-recirculating sewage treatment reactor of the present invention, the angle between the third guide plate and the fifth guide plate is greater than or equal to 45 degrees and less than or equal to 60 degrees.

[0011] In the micro-powered self-recirculation sewage treatment reactor of the present invention, the water inlet is arranged at a position higher than the anaerobic zone.

[0012] The present invention provides a micro-powered self-recirculating sewage treatment reactor, wherein the secondary hydraulic circulation structure comprises a sixth guide plate horizontally arranged in the inner cavity of the reactor body, the sixth guide plate is connected to a seventh guide plate inclined to the upper right through a mud collecting trough, the area between the partition plate and the seventh guide plate in the secondary reaction zone and the area below the sixth guide plate form a second anoxic zone, and the seventh guide plate, the right part of the reactor body area and the second power assembly work together to form a second gas lift aerobic zone.

[0013] The present invention provides a micro-powered self-recirculating sewage treatment reactor, wherein the sludge collecting trough is a trapezoidal trough body with an opening at the upper end, the angle between the two side walls of the sludge collecting trough and the horizontal plane is greater than or equal to 45 degrees and less than or equal to 60 degrees, the sludge collecting trough extends out of the reactor body through a sludge discharge pipe, and the surface of the sludge discharge pipe is provided with a plurality of openings facing downward.

[0014] The micro-powered self-reflux sewage treatment reactor of the present invention, wherein the solid-liquid separation clarification zone includes two first connecting plates connected to the upper wall of the inner cavity of the reactor body and a second connecting plate connected between the lower ends of the two first connecting plates, the second connecting plate is provided with a plurality of through holes for water to pass through, and the water collecting trough and the water weir are arranged in the area composed of the two first connecting plates, the second connecting plate and the wall of the reactor body.

[0015] The micro-powered self-return sewage treatment reactor of the present invention, wherein the left and right sides of the lower end of the second connecting plate are respectively provided with a first inner inclined plate and a second inner inclined plate inclined inwardly, a fifth water passage is formed between the first inner inclined plate and the second inner inclined plate, a sixth water passage is formed between the sixth guide plate and the second inner inclined plate, and a seventh water passage is formed between the sixth guide plate, the mud collecting trough and the lower wall of the reactor body.

[0016] The micro-powered self-recirculating sewage treatment reactor of the present invention, wherein the length of the second inner inclined plate is greater than the length of the first inner inclined plate, the first inner inclined plate, the second inner inclined plate and the horizontal plane have the same angle, and the angle is greater than or equal to 45 degrees and less than or equal to 60 degrees.

[0017] In the micro-powered self-reflux sewage treatment reactor of the present invention, the segmented water inlet is arranged at a position higher than the second anoxic zone.

[0018] The micro-powered self-recirculating sewage treatment reactor of the present invention, wherein the second power assembly comprises a second microporous aerator group consisting of a plurality of microporous aerators arranged at intervals, and the second microporous aerator group is located below the seventh guide plate and on the left side of the left side plate of the reactor body.

[0019] After adopting the above scheme, the micro-powered self-reflow sewage treatment reactor of the present invention has the following beneficial effects:

[0020] 1. A primary hydraulic circulation structure, a secondary hydraulic circulation structure and corresponding first power components and second power components are arranged in the inner cavity of the reactor body to form two groups of hydraulic circulation structures, thereby generating airlift plug flow micro-power, and utilizing the driving effect of the water head generated by the dissolved air water in the first airlift aerobic zone and the second airlift aerobic zone to transport the mixed liquid in the first airlift aerobic zone and the second airlift aerobic zone to the first anoxic zone, the second anoxic zone, the third anoxic zone and the anaerobic zone, thereby realizing the reflux of the mixed liquid without applying external power equipment, thereby saving equipment cost and operation cost;

[0021] 2. By arranging the first guide plate and the second guide plate in the primary reaction zone and the sixth guide plate and the seventh guide plate in the secondary reaction zone, the mixed liquid is refluxed to form a circulating flow, thus realizing hydraulic stirring without external power equipment, saving equipment investment and energy consumption;

[0022] 3. By setting up a solid-liquid separation and clarification zone in the secondary reaction zone of the reactor body, A 2 The integration of / O process and solid-liquid separation equipment saves floor space;

[0023] 4. Through the process design in the primary reaction zone and the secondary reaction zone, two-stage denitrification and phosphorus removal are carried out. During the operation, the segmented inlet flow rate is adjusted and the distribution of the inlet carbon source is flexibly adjusted to achieve a more efficient denitrification and phosphorus removal effect.

[0024] In summary, compared with the prior art, the present invention saves floor space, reduces construction cost and operation cost, and at the same time achieves more efficient nitrogen and phosphorus removal effects, improves effluent water quality, and effectively improves the existing A 2 The economy and applicability of / O process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of an embodiment of a micro-powered self-recirculating sewage treatment reactor of the present invention;

[0026] Figure 2 yes Figure 1 AA section structural diagram;

[0027] Figure 3 yes Figure 1 BB-direction cross-sectional structural diagram;

[0028] Figure 4 yes Figure 1 Schematic diagram of the CC-section structure;

[0029] Figure 5 yes Figure 1 DD-direction cross-sectional structural diagram;

[0030] Figure 6 yes Figure 1 EE section structural diagram;

[0031] Figure 7 yes Figure 1 FF section structure schematic diagram.

[0032] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings; DETAILED DESCRIPTION

[0033] like Figures 1 to 7 As shown, the micro-powered self-recirculation sewage treatment reactor of the present invention includes a hollow reactor body 1, and the reactor body 1 of this embodiment is in the shape of a rectangular parallelepiped. The reactor body 1 divides the inner cavity into two parts, a primary reaction zone and a secondary reaction zone, by a partition plate 2 arranged on the upper wall of the inner cavity. The partition plate 2 of this embodiment is vertically connected to the upper wall of the inner cavity of the reactor body 1. A first water passage 3 is formed between the lower end of the partition plate 2 and the reactor body 1. A primary hydraulic circulation structure is provided in the primary reaction zone, and a secondary hydraulic circulation structure is provided in the secondary reaction zone.

[0034] The primary hydraulic circulation structure includes a first guide plate 4 vertically arranged on the upper wall of the primary reaction zone and a second guide plate 5 located below the first guide plate 4. In this embodiment, the first guide plate 4 is perpendicular to the upper wall of the primary reaction zone. The second guide plate 5 includes a third guide plate 6 arranged horizontally and a fifth guide plate 8 inclined to the upper right. The angle between the third guide plate 6 and the fifth guide plate 8 is greater than or equal to 45 degrees and less than or equal to 60 degrees. The water flow rate v≥0.3m / s below the third guide plate 6 in the primary reaction zone ensures that the activated sludge effectively flows at the bottom of the inner cavity of the reactor body 1 without deposition. The third guide plate 6 and the fifth guide plate 8 are smoothly connected by an arc-shaped fourth guide plate 7, and the arc radius of the fourth guide plate 7 is R≥2.0m to ensure a smooth transition at the junction of the two guide plates and avoid sludge accumulation to form dead sludge. The third guide plate 6 is located directly below the first guide plate 4. A second water passage 9 is formed between the third guide plate 6 and the first guide plate 4. A third water passage 10 is formed between the third guide plate 6 and the lower wall of the reactor body 1. An anaerobic zone 11 is formed between the left area of ​​the first guide plate 4 and between the third guide plate 6 and the lower part of the inner cavity of the reactor body 1. A fourth water passage 12 is formed between the fifth guide plate 8 and the upper wall of the reactor body 1. A first anoxic zone 13 is formed between the first guide plate 4 and the upper part of the fifth guide plate 8.

[0035] The lower surface of the primary reaction zone is located between the right part below the primary hydraulic circulation structure and the partition plate 2, and the first power assembly includes a first microporous aerator group 14 composed of a plurality of microporous aerators arranged at intervals. In this embodiment, the first microporous aerator group 14 is composed of a base and 5×5 microporous aerators installed on the base. The first microporous aerator group 14 is arranged below the fifth guide plate 8, and the fifth guide plate 8, the partition plate 2 and the first power assembly work together to form a first gas lift aerobic zone 15.

[0036] A water inlet 16 is provided on the left side wall of the reactor body 1 , and the water inlet 16 is arranged at a position higher than the anaerobic zone 11 .

[0037] The secondary hydraulic circulation structure includes a sixth guide plate 17 horizontally arranged in the inner cavity of the reactor body 1. The sixth guide plate 17 is connected to the seventh guide plate 19 inclined to the upper right through the mud collecting trough 18. The water flow rate v below the sixth guide plate 17 in the secondary reaction zone is ≥ 0.3m / s, ensuring that the activated sludge effectively flows at the bottom of the inner cavity of the reactor body 1 without deposition. The area between the partition plate 2 and the seventh guide plate 19 in the secondary reaction zone and the area below the sixth guide plate 17 form a second anoxic zone 20, and the seventh guide plate 19, the right part of the reactor body 1 and the second power assembly work together to form a second gas-lift aerobic zone 21. The mud collecting trough 18 is a trapezoidal trough body with an opening at the upper end. The angles between the left and right side walls of the mud collecting trough 18 and the horizontal plane are both greater than or equal to 45 degrees and less than or equal to 60 degrees, ensuring the effect of the mud collecting trough 14 in collecting residual sludge. The sludge collecting tank 18 extends out of the reactor body 1 through the sludge discharge pipe 22. The surface of the sludge discharge pipe 22 is provided with a plurality of openings opening downward. The apertures of the openings are ≥5 mm, and the spacing between adjacent openings is ≤500 mm.

[0038] A second power assembly is provided between the right part of the lower surface of the secondary reaction zone below the secondary hydraulic circulation structure and the right side plate of the reactor body 1. The second power assembly includes a second microporous aerator group 23 composed of a plurality of microporous aerators arranged at intervals. In this embodiment, the second microporous aerator group 23 is composed of a base and 5×5 microporous aerators installed on the base. The second microporous aerator group 23 is located below the seventh guide plate 19 and on the left side of the left side plate of the reactor body 1.

[0039] A segmented water inlet 24 is provided on the wall of the reactor body 1 at a portion located in the secondary reaction zone. The segmented water inlet 24 is arranged at a position higher than the second anoxic zone 20 .

[0040] A solid-liquid separation and clarification zone 25 is provided above the secondary water circulation structure. A water collecting tank and a water weir 26 are provided in the solid-liquid separation and clarification zone 25 . The water collecting tank and the water weir 26 are connected to the outside of the reactor body 1 through a water outlet pipe 27 .

[0041] The solid-liquid separation clarification zone 25 includes two first connecting plates 28 connected to the upper wall of the inner cavity of the reactor body 1 and a second connecting plate 29 connected between the lower ends of the two first connecting plates 28. The water rising velocity between the two first connecting plates 28 is ≤0.3mm / s to ensure the solid-liquid separation effect.

[0042] The second connecting plate 29 is provided with a plurality of through holes 36 for water to pass through, the aperture of the through holes 36 is ≥100 mm, and the horizontal spacing is 500 mm-800 mm, so that the arrangement can facilitate hydraulic circulation. The water collecting tank and the water weir 26 are arranged in the area composed of the two first connecting plates 28, the second connecting plate 29 and the wall of the reactor body 1.

[0043] A first inner inclined plate 30 and a second inner inclined plate 31 are respectively provided on the left and right sides of the lower end of the second connecting plate 29, the length of the second inner inclined plate 31 is greater than the length of the first inner inclined plate 30, and the first inner inclined plate 30 and the second inner inclined plate 31 have the same angle with the horizontal plane, and the angle is greater than or equal to 45 degrees and less than or equal to 60 degrees, so that the sludge can fall smoothly during the solid-liquid separation process.

[0044] A fifth water passage 32 is formed between the first inner inclined plate 30 and the second inner inclined plate 31, and the water inlet velocity of the fifth water passage 32 is ≤0.05 m / s. A sixth water passage 33 is formed between the sixth guide plate 17 and the second inner inclined plate 31, a seventh water passage 34 is formed between the sixth guide plate 17, the mud collecting trough 18 and the lower wall of the reactor body 1, and an eighth water passage 35 is formed between the seventh guide plate 19 and the upper wall of the secondary reaction zone.

[0045] The water treatment process of the present invention is as follows: in the primary reaction zone, under the guiding action of the third guide plate 6, the fifth guide plate 8, and the first guide plate 4 of the primary hydraulic circulation structure and under the action of the auxiliary flow force provided by the first gas lift aerobic zone 15 while providing oxygen, a circulating flow state is formed to complete a complete A 2 / O biological reaction process; in the secondary reaction zone, under the guidance of the sixth guide plate 17, the seventh guide plate 19 and the through hole 36 passing through the second connecting plate 29 of the secondary hydraulic circulation structure, and under the action of the auxiliary flow force provided by the second gas lift aerobic zone 21 while providing oxygen, a circulating flow state is formed to complete a complete A / O biological reaction process, and finally solid-liquid separation is carried out in the solid-liquid separation clarification zone 25.

[0046] During the water treatment process, most of the raw water enters the anaerobic zone 11 through the water inlet pipe at the water inlet 16, and the polyphosphate bacteria in the water release phosphorus to obtain energy, and the polyphosphate bacteria biological selection process is carried out. After completing the anaerobic retention and biochemical process, the mixed liquid in the anaerobic zone 11 passes through the third water passage 10 at the lower part of the third guide plate 6 of the primary reaction zone, and enters the first airlift aerobic zone 15 provided with the first microporous aerator group 14 under the action of negative pressure, and performs aerobic biochemical reactions in this area to remove organic pollutants marked by CODcr and BOD5 and complete the phosphorus release process of polyphosphate bacteria, and at the same time, performs nitrification reaction to convert ammonia nitrogen in the sewage into nitrate nitrogen. After the aerobic reaction, part of the mixed liquid flows back to the first anoxic zone 13 through the fourth water passage 12 under the driving force of airlift to perform denitrification reaction, and converts nitrate nitrogen into nitrogen gas through the second water passage 9 and then through the upper discharge system to complete the biological denitrification process. As the raw water continues to enter, the mixed liquid in the primary reaction zone is pushed from the first water passage 3 at the lower part of the partition plate 2 into the second anoxic zone 20 of the secondary reaction zone. In this area, a small part of the inlet water from the segmented water inlet 24 is mixed with the reflux mixed liquid of the second gas lift aerobic zone 21 through the fifth water passage 32 to complete the secondary denitrification reaction and further denitrification. Then, under the action of negative pressure, it enters the second gas lift aerobic zone 21 through the seventh water passage 34 for secondary aerobic biochemical reaction. Then, under the action of the gas lift driving force, it flows back to the second anoxic zone 20 through the eighth water passage 35 to complete the cycle of the secondary biochemical reaction. Finally, it enters the solid-liquid separation and clarification zone 25 for solid-liquid separation. The separated supernatant passes through the water collecting tank and the water weir 26 and is discharged from the reactor body 1 through the outlet pipe 27. The remaining sludge enters the sludge collecting tank 18 by its own gravity and is finally discharged from the reactor body 1 through the sludge discharge pipe 22.

[0047] The micro-powered self-reflow sewage treatment reactor of the present invention uses air-lift push flow micro-power, and makes full use of the physical effects that the overall specific gravity of the gas-containing water generated by the aeration of multiple microporous aerators of the first microporous aerator group 14 and the second microporous aerator group 23 is less than the specific gravity of water, and the volume expansion and the vertical rise of the acceleration of the underwater bubbles carrying water. The first air-lift aerobic zone 15 and the second air-lift aerobic zone 21 are arranged in the reactor body 1. While supplying oxygen, the water head generated by these two areas, that is, the potential energy of the water, promotes the overall flow of the water body, that is, the potential energy is converted into kinetic energy. The microporous aerator with higher oxygen mass transfer efficiency is selected, and only the gas volume required for nitrification and removal of carbon source pollutants is provided, without adding any other power and equipment, so that the reactor of the present invention can flow as a whole at a flow rate that ensures that the activated sludge does not sink and precipitate. Its energy consumption level is only within the range of the system biochemical oxygen demand, and its equipment is only a single device of the first microporous aerator group 14 and the second microporous aerator group 23. Under the premise of eliminating the high sludge return equipment, the oxygen supply and return process of the entire reactor biochemical system can be realized, saving equipment cost and operating cost; through the setting of the primary hydraulic circulation structure and the secondary hydraulic circulation structure, combined with the mixed liquid return, the sewage forms a two-stage circulation flow in the reactor, realizing hydraulic stirring without external power equipment, realizing the micro-power operation of the entire reactor system, saving equipment investment and energy consumption; the system is divided into a primary reaction zone (A) by the lower water-passing partition plate 2 2 The design of the two-stage reaction of the reactor body 1 and the secondary reaction zone (A / O) is used to carry out two-stage denitrification and phosphorus removal. A segmented water inlet 24 is set at the front of the secondary reaction zone. During operation, the flow rate of the segmented water inlet 24 is adjusted to flexibly adjust the distribution of the inlet carbon source to achieve a more efficient denitrification and phosphorus removal effect. The operation process is flexible and changeable, and the operability is enhanced. A solid-liquid separation clarification zone 25 is set inside the reactor body 1 to achieve A / O. 2 The integration of / O process and solid-liquid separator saves floor space.

[0048] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope of the claims of the present invention.

Claims

1. A micro-powered self-recirculating sewage treatment reactor, characterized in that: The invention comprises a hollow reactor body, wherein the reactor body divides the inner cavity into a primary reaction zone and a secondary reaction zone by a partition plate arranged on the upper wall of the inner cavity, a first water passage is formed between the lower end of the partition plate and the reactor body, a primary hydraulic circulation structure and a secondary hydraulic circulation structure are respectively arranged in the primary reaction zone and the secondary reaction zone, a first power assembly is arranged between the right part of the lower surface of the primary reaction zone located below the primary hydraulic circulation structure and the partition plate, a second power assembly is arranged between the right part of the lower surface of the secondary reaction zone located below the secondary hydraulic circulation structure and the right side plate of the reactor body, a water inlet is arranged on the left side wall of the reactor body, a segmented water inlet is arranged at the part of the wall of the reactor body located in the secondary reaction zone, a solid-liquid separation clarification zone is arranged above the secondary hydraulic circulation structure, a water collecting tank and a water weir are arranged in the solid-liquid separation clarification zone, and the water collecting tank and the water weir are connected with the outside of the reactor body through a water outlet pipe; The primary hydraulic circulation structure includes a first guide plate vertically arranged on the upper wall of the primary reaction zone and a second guide plate located below the first guide plate. The second guide plate includes a third guide plate arranged horizontally and a fifth guide plate inclined to the upper right. The third guide plate and the fifth guide plate are smoothly connected by an arc-shaped fourth guide plate. The third guide plate is located directly below the first guide plate. A second water passage is formed between the third guide plate and the first guide plate. A third water passage is formed between the third guide plate and the lower wall of the reactor body. An anaerobic zone is formed between the left area of ​​the first guide plate and the lower part of the inner cavity of the reactor body. A fourth water passage is formed between the fifth guide plate and the upper wall of the reactor body. A first anoxic zone is formed between the first guide plate and the upper part of the fifth guide plate. The first power assembly is arranged below the fifth guide plate. The fifth guide plate, the partition plate and the first power assembly work together to form a first gas-lift aerobic zone.

2. The micro-powered self-recirculating sewage treatment reactor according to claim 1 is characterized in that: The first power assembly includes a first microporous aerator group consisting of a plurality of microporous aerators arranged at intervals.

3. The micro-powered self-recirculating sewage treatment reactor according to claim 1 is characterized in that: The included angle between the third guide plate and the fifth guide plate is greater than or equal to 45 degrees and less than or equal to 60 degrees.

4. The micro-powered self-recirculating sewage treatment reactor according to claim 1 is characterized in that: The water inlet is arranged at a position higher than the anaerobic zone.

5. The micro-powered self-recirculating sewage treatment reactor according to claim 1 is characterized in that: The secondary hydraulic circulation structure includes a sixth guide plate horizontally arranged in the inner cavity of the reactor body, and the sixth guide plate is connected to the seventh guide plate inclined to the upper right through a mud collecting trough. The area between the partition plate and the seventh guide plate in the secondary reaction zone and the area below the sixth guide plate form a second anoxic zone, and the seventh guide plate, the right part of the reactor body and the second power assembly work together to form a second gas-lift aerobic zone.

6. The micro-powered self-recirculating sewage treatment reactor according to claim 5 is characterized in that: The sludge collecting trough is a trapezoidal trough body with an open upper end, and the angle between the two side walls of the sludge collecting trough and the horizontal plane is greater than or equal to 45 degrees and less than or equal to 60 degrees. The sludge collecting trough extends out of the reactor body through a sludge discharge pipe, and the surface of the sludge discharge pipe is provided with multiple openings opening downward.

7. The micro-powered self-recirculating sewage treatment reactor according to claim 5 is characterized in that: The solid-liquid separation clarification zone includes two first connecting plates connected to the upper wall of the inner cavity of the reactor body and a second connecting plate connected between the lower ends of the two first connecting plates. The second connecting plate is provided with a plurality of through holes for water to pass through. The water collecting trough and the water weir are arranged in the area composed of the two first connecting plates, the second connecting plate and the wall of the reactor body.

8. The micro-powered self-recirculating sewage treatment reactor according to claim 7 is characterized in that: A first inner inclined plate and a second inner inclined plate inclined inwardly are respectively provided on the left and right sides of the lower end of the second connecting plate, a fifth water passage is formed between the first inner inclined plate and the second inner inclined plate, a sixth water passage is formed between the sixth guide plate and the second inner inclined plate, and a seventh water passage is formed between the sixth guide plate, the mud collecting trough and the lower wall of the reactor body.

9. The micro-powered self-recirculating sewage treatment reactor according to claim 8, characterized in that: The length of the second inner inclined plate is greater than that of the first inner inclined plate. The first inner inclined plate and the second inner inclined plate have the same angle with the horizontal plane, and the angle is greater than or equal to 45 degrees and less than or equal to 60 degrees.

10. The micro-powered self-recirculating sewage treatment reactor according to claim 5, characterized in that: The segmented water inlet is arranged at a position higher than the second anoxic zone.

11. The micro-powered self-recirculating sewage treatment reactor according to claim 5, characterized in that: The second power assembly includes a second microporous aerator group consisting of a plurality of microporous aerators arranged at intervals, and the second microporous aerator group is located below the seventh guide plate and on the left side of the left side plate of the reactor body.

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