An internal circulation IC anaerobic reactor

Abstract

The present invention discloses an internal circulation IC anaerobic reactor, comprising a reactor housing, wherein a first three-phase separator and a second three-phase separator are respectively disposed within the reactor housing from top to bottom. A biogas collection hood is disposed at the top of the reactor housing, the top of the biogas collection hood being connected to a biogas discharge pipe, and a water inlet pipe is disposed at the bottom of the reactor housing. The present invention adds a cleaning mechanism to the external circulation mechanism. When a circulation pump is turned on, wastewater enters and flows into the external circulation pipe. When the wastewater flows through the impeller, it drives the impeller to rotate, thereby driving the rotation shaft, thereby driving the cleaning mechanism to operate. When the rotation shaft rotates, it drives a prismatic guide rod. The collar and the prismatic guide rod are non-rotatable relative to each other. The rotation shaft drives a scraper to rotate relative to the surface of the filter cover, thereby scraping off sludge accumulated on the surface of the filter cover, thereby improving the filtration efficiency of the filter cover and preventing the filter cover from being clogged by sludge.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, in particular to an internal circulation IC anaerobic reactor. Background Art

[0002] IC (internal circulation) reactor is a new generation of high-efficiency anaerobic reactor, that is, internal circulation anaerobic reactor, which is similar to two layers of UASB reactors connected in series. It is used for high-concentration organic wastewater, such as corn starch wastewater, citric acid wastewater, beer wastewater, potato processing wastewater, and alcohol wastewater.

[0003] IC reactors are currently widely used in the papermaking industry by papermaking companies that use various types of waste paper as raw materials. The treatment objectives include achieving general emission standards and reusing the treated wastewater, thereby achieving the dual goals of water conservation and pollution control.

[0004] The bottom mixing zone of the anaerobic reactor in the prior art does not have the function of stirring and mixing. The incoming water is only mixed with the sludge through the dispersion of the water distributor, and the mixing effect is poor. In addition, the water outlet of the water distributor has no anti-clogging function, and the sludge can easily enter the water distributor, affecting the water distribution effect. Summary of the Invention

[0005] In order to solve the problems mentioned in the above background technology, the present invention provides an internal circulation IC anaerobic reactor.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An internal circulation IC anaerobic reactor comprises a reactor shell, wherein a first three-phase separator and a second three-phase separator are respectively arranged in the reactor shell from top to bottom, a biogas collection cover is provided at the top of the reactor shell, a biogas discharge pipe is connected to the top of the biogas collection cover, a water inlet pipe is provided at the bottom of the reactor shell, a clean water discharge pipe is connected to one side of the top of the reactor shell, a vertical gas-liquid return pipe is installed in the reactor shell, an external circulation mechanism is installed on the outside of the reactor shell, and a vertical gas-liquid return pipe is installed in the reactor shell;

[0008] The external circulation mechanism includes an external circulation pipe, a circulation pump is installed on the external circulation pipe, the top of the external circulation pipe is the water inlet end, and the water inlet end is installed with a filtering mechanism, one end of the water inlet pipe extends to the interior of the reactor shell and is connected to a water distribution and stirring mechanism.

[0009] Preferably, a reflector is installed in the first three-phase separator and the second three-phase separator, the top of the reflector is connected to a gas collecting pipe, the end of the gas collecting pipe away from the reflector is connected to a biogas collecting vertical pipe, and the top of the biogas collecting vertical pipe extends into the biogas collection hood.

[0010] Preferably, a closed shell is provided on the outer circulation pipe near the water inlet end, a rotating shaft is rotatably installed in the closed shell through a bracket, an impeller is installed on the outside of the rotating shaft, a filter cover is installed at a position corresponding to the water inlet end of the outer circulation pipe inside the reactor shell, one end of the rotating shaft movably passes through the filter cover and is installed with a cleaning mechanism.

[0011] Preferably, the filter cover is provided with a plurality of filter holes, a prismatic guide rod is fixed to one end of the rotating shaft close to the filter cover, a collar is installed on the outside of the prismatic guide rod, a scraper is installed on the collar, and the scraper contacts the filter cover.

[0012] Preferably, the collar is movably sleeved on the outside of the prism guide rod, and a first spring is connected between the side of the collar away from the filter cover and the prism guide rod.

[0013] The water distribution and stirring mechanism includes a supporting shell, the bottom end of the supporting shell is connected to the water inlet pipe, and multiple water distribution pipes are rotatably installed on the top of the supporting shell. The bottom ends of the water distribution pipes extend into the supporting shell, and a driving spur gear is rotatably installed at the center position on the inner wall of the top of the supporting shell. The bottom ends of the water distribution pipes near the periphery are connected to the outer ring driven spur gears, and the bottom ends of the water distribution pipes near the center are connected to the inner ring driven spur gears. The inner ring driven spur gears are located between the outer ring driven spur gears and the driving spur gears, and the driving spur gears are meshed with the inner ring driven spur gears, and the inner ring driven spur gears are meshed with the outer ring driven spur gears.

[0014] Preferably, the bottom end of the driving spur gear is coaxially fixed with a driven bevel gear, a rotating motor is fixed on the outer wall of the reactor shell, the output shaft of the rotating motor extends into the support shell and is fixed with the driving bevel gear, and the driving bevel gear is meshed with the driven bevel gear.

[0015] Preferably, a plurality of stirring and water distribution branch pipes are evenly distributed on the outside of the water distribution pipe, and the stirring and water distribution branch pipes on the outside of adjacent water distribution pipes are staggered.

[0016] Preferably, the agitating water distribution branch pipe is provided with a water outlet at one end away from the water distribution pipe, and a sealing plug is elastically installed in the water outlet.

[0017] Preferably, a plurality of movable rods are fixed to the side of the sealing plug close to the water distribution pipe, the movable rods are movably extended to the interior of the stirring and water distribution branch pipe through the guide through holes, and a second spring is sleeved on the outer side of the movable rods.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By adding a cleaning mechanism to the external circulation mechanism, when the circulation pump is turned on, wastewater enters the external circulation pipe and flows in the external circulation pipe. When the wastewater flows through the impeller, it can drive the impeller to rotate, thereby driving the rotating shaft to rotate, and thus driving the cleaning mechanism to work through the rotating shaft. When the rotating shaft rotates, it can drive the prismatic guide rod. The collar and the prismatic guide rod cannot rotate relative to each other. The rotating shaft drives the scraper to rotate relative to the surface of the filter cover, thereby scraping off the sludge accumulated on the surface of the filter cover, which can improve the filtration efficiency of the filter cover and prevent the filter cover from being blocked by sludge.

[0020] 2. The collar can slide horizontally on the prismatic guide rod. A baffle is connected to the prismatic guide rod. One end of the first spring is fixed to the baffle, and the other end of the first spring contacts the collar. The elastic force of the first spring can push the collar toward the filter cover, and can push the scraper to contact the filter cover, so that the scraper can always maintain close contact with the filter cover, thereby better scraping off the sludge.

[0021] 3. The water distribution pipes are evenly arranged in two concentric circles at the top of the supporting shell. When the driving spur gear rotates, it can first drive the inner driven spur gear to rotate, thereby driving the inner water distribution pipe to rotate. Then, the outer water distribution pipe is driven to rotate by meshing the inner driven spur gear with the outer driven spur gear. The water distribution pipes can increase the range of water distribution, thereby improving the mixing effect between water and sludge, and improving the efficiency of sewage treatment. When the stirring water distribution branch pipe rotates with the moving water distribution pipe, it can stir the sludge in the mixing zone, thereby accelerating the mixing. In addition, when the stirring water distribution branch pipe rotates with the moving water distribution pipe, it can continuously change the direction of the water outlet, thereby further increasing the range of water distribution.

[0022] 4. When sewage enters the water inlet pipe, the sewage is first distributed into the water distribution pipe, then enters the mixing and water distribution branch pipe, and then sprayed out from the water outlet. Due to the existence of water pressure, it will give pressure to the sealing plug, causing the second spring to be compressed, so that the sealing plug is separated from the water outlet, and the water outlet is opened, which will not affect the discharge of sewage. When there is no sewage entering the water inlet pipe, the second spring resets and pulls the sealing plug toward the water outlet, thereby blocking the water outlet, which can prevent sludge from entering the water outlet and blocking the water outlet; BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a cross-sectional view from the main perspective of the present invention;

[0025] Figure 2 This is a first perspective stereogram of the present invention;

[0026] Figure 3 For the present invention Figure 2 perspective cutaway view;

[0027] Figure 4 is a first perspective three-dimensional cross-sectional view of the present invention;

[0028] Figure 5 For the present invention Figure 1 A position enlarged detail picture;

[0029] Figure 6 For the present invention Figure 4 Enlarged detail of position B;

[0030] Figure 7 This is an enlarged detail view of the water distribution and stirring mechanism of the present invention;

[0031] Figure 8 This is an enlarged cross-sectional view of the agitation and water distribution branch pipe of the present invention;

[0032] In the figure: 1 reactor shell, 2 water inlet pipe, 3 water distribution and stirring mechanism, 301 support shell, 302 water distribution pipe, 303 stirring and water distribution branch pipe, 3031 water outlet, 3032 sealing plug, 3033 movable rod, 3034 second spring, 304 outer ring driven spur gear, 305 driving spur gear, 306 inner ring driven spur gear, 307 driven bevel gear, 4 first three-phase separator, 401 second three-phase separator, 4 02 reflector, 4021 gas collecting pipe, 403 biogas collecting vertical pipe, 5 biogas collecting hood, 501 biogas discharge pipe, 6 clean water discharge pipe, 7 external circulation pipe, 701 circulation pump, 702 sealed shell, 703 rotating shaft, 7031 prismatic guide rod, 7032 collar, 7033 scraper, 7034 first spring, 704 filter cover, 7041 filter hole, 8 rotating motor, 801 driving bevel gear, 9 gas-liquid reflux pipe. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0034] Example 1

[0035] Reference Figure 1-8An internal circulation IC anaerobic reactor includes a reactor shell 1, in which a first three-phase separator 4 and a second three-phase separator 401 are respectively arranged from top to bottom. A biogas collection cover 5 is provided at the top of the reactor shell 1, and a biogas discharge pipe 501 is connected to the top of the biogas collection cover 5. A water inlet pipe 2 is provided at the bottom of the reactor shell 1, and a clean water discharge pipe 6 is connected to one side of the top of the reactor shell 1. A vertical gas-liquid reflux pipe 9 is installed in the reactor shell 1, and an external circulation mechanism is installed outside the reactor shell 1. A vertical gas-liquid reflux pipe 9 is installed in the reactor shell 1;

[0036] Above the first three-phase separator 4 is the steam-water separation zone, below the second three-phase separator 401 is the first anaerobic zone, and between the first and second three-phase separators 401 is the second anaerobic zone. During operation, the water to be purified enters the reactor housing 1 from the bottom through the water inlet pipe 2. There, it mixes with the granular sludge and the mud-water mixture returning from the gas-liquid return pipe 9. The mud-water mixture then enters the first anaerobic zone. Under the action of the high-concentration sludge, most of the organic matter is converted into biogas. The upward flow of the mixed liquid and the violent disturbance of the biogas cause the sludge in this reaction zone to expand and fluidize, enhancing the surface contact between the mud and water, thereby maintaining high sludge activity. As biogas production increases, a portion of the sludge-water mixture is lifted by the biogas. After separation in the second three-phase separator 401, some biogas is collected and directed to the biogas collection hood 5, while some sludge is separated and precipitated. After treatment in the first anaerobic zone, the wastewater, except for a portion lifted by the biogas, passes through the second three-phase separator 401 and enters the second anaerobic zone. The sludge concentration in this zone is low, and most of the organic matter in the wastewater has already been degraded in the first anaerobic zone. Therefore, biogas production is low, and disturbance to the second anaerobic zone is minimal, which provides favorable conditions for sludge retention. After passing through the first three-phase separator 4, the wastewater enters the gas-liquid separation zone, where the biogas in the lifted mixture is separated from the sludge and water and directed out of the treatment system. The sludge-water mixture then returns to the mixing zone at the bottom along the gas-liquid reflux pipe 9, where it is fully mixed with the sludge and influent at the bottom of the reactor, achieving internal circulation of the mixed liquid.

[0037] The external circulation mechanism includes an external circulation pipe 7, on which a circulation pump 701 is installed. The top of the external circulation pipe 7 is a water inlet end, and a filtering mechanism is installed at the water inlet end. One end of the water inlet pipe 2 extends to the interior of the reactor shell 1 and is connected to a water distribution and stirring mechanism 3.

[0038] The wastewater treated in the second anaerobic zone can be pumped back to the bottom of the reactor shell 1 by the power of the circulation pump 701, and then treated again through the first anaerobic zone and the second anaerobic zone to achieve the purpose of external circulation, thereby circulating the sewage and improving the treatment effect.

[0039] Example 2

[0040] Reference Figure 1-8 The difference between this embodiment and embodiment 1 is that a reflector 402 is installed in the first three-phase separator 4 and the second three-phase separator 401. The top of the reflector 402 is connected to a gas collecting pipe 4021. The end of the gas collecting pipe 4021 away from the reflector 402 is connected to a biogas collecting vertical pipe 403. The top of the biogas collecting vertical pipe 403 extends into the biogas collection cover 5.

[0041] The biogas bubbles rise to the reflector 402 and burst, and then are collected by the gas collecting pipe 4021 and the biogas collecting vertical pipe 403 and enter the biogas collecting cover 5.

[0042] Among them, a closed housing 702 is provided on the outer circulation pipe 7 near the water inlet end, and a rotating shaft 703 is rotatably installed in the closed housing 702 through a bracket. An impeller is installed on the outside of the rotating shaft 703. A filter cover 704 is installed in the inside of the reactor housing 1 at a position corresponding to the water inlet end of the outer circulation pipe 7. One end of the rotating shaft 703 movably passes through the filter cover 704 and is equipped with a cleaning mechanism;

[0043] When the circulation pump 701 is turned on, the wastewater enters the outer circulation pipe 7 and flows in the outer circulation pipe 7. When the wastewater flows through the impeller, it can drive the impeller to rotate, thereby driving the rotating shaft 703 to rotate, thereby driving the cleaning mechanism to work through the rotating shaft 703. The filter cover 704 can filter out large particles of sludge in the wastewater. The large particles of sludge will accumulate on the surface of the filter cover 704, so it needs to be continuously cleaned, and the sludge on the surface of the filter cover 704 is cleaned by the cleaning mechanism.

[0044] Example 3

[0045] Reference Figure 1-8 The difference between this embodiment and embodiment 2 is that, in order to achieve the effect of cleaning the sludge on the surface of the filter cover 704, a plurality of filter holes 7401 are opened on the filter cover 704, a prismatic guide rod 7031 is fixed to the end of the rotating shaft 703 close to the filter cover 704, a collar 7032 is installed on the outside of the prismatic guide rod 7031, and a scraper 7033 is installed on the collar 7032, and the scraper 7033 contacts the filter cover 704;

[0046] When the rotating shaft 703 rotates, it can drive the prism guide rod 7031. The ring 7032 and the prism guide rod 7031 cannot rotate relative to each other. The rotating shaft 703 drives the scraper 7033 to rotate relative to the surface of the filter cover 704, thereby scraping off the sludge accumulated on the surface of the filter cover 704, improving the filtering efficiency of the filter cover 704, and preventing the filter cover 704 from being blocked by sludge.

[0047] The collar 7032 is movably mounted on the outside of the prism guide rod 7031 , and a first spring 7034 is connected between the side of the collar 7032 away from the filter cover 704 and the prism guide rod 7031 ;

[0048] The ring 7032 can slide horizontally on the prism guide rod 7031, and a baffle is connected to the prism guide rod 7031. One end of the first spring 7034 is fixed to the baffle, and the other end of the first spring 7034 is in contact with the ring 7032. The elastic force of the first spring 7034 can push the ring 7032 to slide toward the filter cover 704, and can push the scraper 7033 to maintain contact with the filter cover 704, so that the scraper 7033 can always maintain close contact with the filter cover 704, so that the sludge can be scraped off better.

[0049] Example 4

[0050] Reference Figure 1-8 The difference between this embodiment and embodiment 1 is that the water distribution and stirring mechanism 3 includes a supporting shell 301, the bottom end of the supporting shell 301 is connected to the water inlet pipe 2, and a plurality of water distribution pipes 302 are rotatably installed on the top of the supporting shell 301. The bottom ends of the water distribution pipes 302 extend into the supporting shell 301. A driving spur gear 305 is rotatably installed at the center position on the inner wall of the top of the supporting shell 301. The bottom ends of the water distribution pipes 302 near the periphery are connected to the outer ring driven spur gears 304, and the bottom ends of the water distribution pipes 302 near the center are connected to the inner ring driven spur gears 306. The inner ring driven spur gears 306 are located between the outer ring driven spur gears 304 and the driving spur gear 305, and the driving spur gear 305 is meshed with the inner ring driven spur gear 306, and the inner ring driven spur gear 306 is meshed with the outer ring driven spur gear 304.

[0051] The water distribution pipes 302 are evenly arranged in two concentric circles at the top of the supporting shell 301. When the driving spur gear 305 rotates, it can first drive the inner ring driven spur gear 306 to rotate, thereby driving the inner ring water distribution pipe 302 to rotate, and then the outer ring water distribution pipe 302 is driven to rotate by engaging the inner ring driven spur gear 306 with the outer ring driven spur gear 304. The water distribution pipes 302 can increase the range of water distribution, thereby improving the mixing effect between the incoming water and the sludge, and improving the efficiency of sewage treatment.

[0052] The bottom end of the driving spur gear 305 is coaxially fixed with a driven bevel gear 307. A rotating motor 8 is fixed to the outer wall of the reactor housing 1. The output shaft of the rotating motor 8 extends into the support housing 301 and is fixed with a driving bevel gear 801. The driving bevel gear 801 is meshed with the driven bevel gear 307.

[0053] The rotating motor 8 can drive the driving bevel gear 801 to rotate, and the driving bevel gear 801 can be engaged with the driven bevel gear 307 to drive the driving spur gear 305 to rotate, thereby driving the water distribution pipe 302 to rotate.

[0054] Among them, a plurality of stirring and water distribution branch pipes 303 are evenly distributed on the outside of the water distribution pipe 302, and the stirring and water distribution branch pipes 303 on the outside of adjacent water distribution pipes 302 are staggered;

[0055] When the stirring water distribution branch pipe 303 rotates following the moving water distribution pipe 302, it can stir the sludge in the mixing area, thereby accelerating the mixing, and when the stirring water distribution branch pipe 303 rotates following the moving water distribution pipe 302, it can continuously change the direction of the water outlet 3031, thereby further increasing the range of water distribution.

[0056] Example 5

[0057] Reference Figure 1-8 The difference between this embodiment and embodiment 4 is that, in order to achieve the purpose of placing sludge into the interior of the agitating and water-distributing branch pipe 303, a water outlet 3031 is formed at one end of the agitating and water-distributing branch pipe 303 away from the water-distributing pipe 302, and a sealing plug 3032 is elastically installed in the water outlet 3031. A plurality of movable rods 3033 are fixed to the side of the sealing plug 3032 close to the water-distributing pipe 302. The movable rods 3033 are movably extended through the guide holes into the interior of the agitating and water-distributing branch pipe 303, and a second spring 3034 is sleeved on the outer side of the movable rods 3033;

[0058] When sewage is introduced into the water inlet pipe 2, the sewage is first distributed to the water distribution pipe 302, then enters the mixing water distribution branch pipe 303, and is then sprayed out from the water outlet 3031. Due to the existence of water pressure, pressure will be applied to the sealing plug 3032, causing the second spring 3034 to be compressed, so that the sealing plug 3032 is separated from the water outlet 3031, and the water outlet 3031 is opened, which will not affect the discharge of sewage. When no sewage enters the water inlet pipe 2, the second spring 3034 is reset and pulls the sealing plug 3032 toward the water outlet 3031, thereby blocking the water outlet 3031, which can prevent sludge from entering the water outlet 3031 and blocking the water outlet 3031.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] In the present invention, unless otherwise expressly specified or limited, terms such as "disposed," "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by a person skilled in the art. The provision of power is also common knowledge in the art. The present invention is mainly used to protect mechanical devices, so the control method and circuit connection are not explained in detail in the present invention.

[0062] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An internal circulation IC anaerobic reactor, comprising a reactor housing (1), characterized in that: The reactor shell (1) is provided with a first three-phase separator (4) and a second three-phase separator (401) from top to bottom, a biogas collecting cover (5) is provided at the top of the reactor shell (1), a biogas discharge pipe (501) is connected to the top of the biogas collecting cover (5), a water inlet pipe (2) is provided at the bottom of the reactor shell (1), a clean water discharge pipe (6) is connected to one side of the top of the reactor shell (1), a vertically arranged gas-liquid return pipe (9) is installed in the reactor shell (1), an external circulation mechanism is installed outside the reactor shell (1), and a vertically arranged gas-liquid return pipe (9) is installed in the reactor shell (1); The external circulation mechanism comprises an external circulation pipe (7), a circulation pump (701) is installed on the external circulation pipe (7), the top end of the external circulation pipe (7) is a water inlet end, and a filtering mechanism is installed at the water inlet end, and one end of the water inlet pipe (2) extends to the interior of the reactor housing (1) and is connected to a water distribution and stirring mechanism (3); The water distribution and stirring mechanism (3) comprises a supporting shell (301), the bottom end of the supporting shell (301) is connected to the water inlet pipe (2), a plurality of water distribution pipes (302) are rotatably mounted on the top end of the supporting shell (301), the bottom ends of the water distribution pipes (302) extend into the supporting shell (301), a driving spur gear (305) is rotatably mounted at the center position on the inner wall of the top end of the supporting shell (301), the bottom ends of the water distribution pipes (302) near the periphery are connected to the outer ring driven spur gear (304), the bottom ends of the water distribution pipes (302) near the center are connected to the inner ring driven spur gear (306), the inner ring driven spur gear (306) is located between the outer ring driven spur gear (304) and the driving spur gear (305), and the driving spur gear (305) is meshed with the inner ring driven spur gear (306), and the inner ring driven spur gear (306) is meshed with the outer ring driven spur gear (304); A driven bevel gear (307) is coaxially fixed to the bottom end of the driving spur gear (305), a rotating motor (8) is fixed to the outer wall of the reactor housing (1), an output shaft of the rotating motor (8) extends into the support housing (301) and is fixed with a driving bevel gear (801), and the driving bevel gear (801) is meshed with the driven bevel gear (307); Multiple stirring and water distribution branch pipes (303) are evenly distributed outside the water distribution pipe (302), and the stirring and water distribution branch pipes (303) outside adjacent water distribution pipes (302) are staggered.

2. The internal circulation IC anaerobic reactor according to claim 1, characterized in that: A reflective plate (402) is installed in the first three-phase separator (4) and the second three-phase separator (401); the top end of the reflective plate (402) is connected to a gas collecting pipe (4021); one end of the gas collecting pipe (4021) away from the reflective plate (402) is connected to a biogas collecting vertical pipe (403); and the top end of the biogas collecting vertical pipe (403) extends into the biogas collecting hood (5).

3. The internal circulation IC anaerobic reactor according to claim 1, characterized in that: A sealed housing (702) is provided on the outer circulation pipe (7) near the water inlet end, a rotating shaft (703) is rotatably mounted in the sealed housing (702) via a bracket, an impeller is mounted on the outside of the rotating shaft (703), a filter cover (704) is mounted inside the reactor housing (1) at a position corresponding to the water inlet end of the outer circulation pipe (7), one end of the rotating shaft (703) movably passes through the filter cover (704) and is mounted with a cleaning mechanism.

4. The internal circulation IC anaerobic reactor according to claim 3, characterized in that: The filter cover (704) is provided with a plurality of filter holes (7401); a prism guide rod (7031) is fixed to one end of the rotating shaft (703) close to the filter cover (704); a collar (7032) is mounted on the outside of the prism guide rod (7031); a scraper (7033) is mounted on the collar (7032); and the scraper (7033) is in contact with the filter cover (704).

5. The internal circulation IC anaerobic reactor according to claim 4, characterized in that: The collar (7032) is movably sleeved on the outside of the prism guide rod (7031), and a first spring (7034) is connected between the side of the collar (7032) away from the filter cover (704) and the prism guide rod (7031).

6. The internal circulation IC anaerobic reactor according to claim 1, characterized in that: A water outlet (3031) is provided at one end of the agitating and water-distributing branch pipe (303) away from the water-distributing pipe (302), and a sealing plug (3032) is elastically installed in the water outlet (3031).

7. The internal circulation IC anaerobic reactor according to claim 6, characterized in that: A plurality of movable rods (3033) are fixed to one side of the sealing plug (3032) close to the water distribution pipe (302). The movable rods (3033) are movably extended through the guide holes to the interior of the stirring and water distribution branch pipe (303), and a second spring (3034) is sleeved on the outer side of the movable rods (3033).

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