Anaerobic reactor

Abstract

The anaerobic reactor comprises a reactor body, a mud-water separation mechanism, a water inlet mechanism, a water distribution mechanism and a mud discharge mechanism, the mud-water separation mechanism comprises a mud-water separator, a water collection hopper and a return pipe, the water collection hopper is located at the position, lower than the liquid level, of the upper end of the reactor body, and the mud-water separator is communicated with the water collection hopper; the first end of the backflow pipe is communicated with the bottom of the mud-water separator, the water inlet mechanism is communicated with the second end of the backflow pipe, the water distribution mechanism is communicated with the water inlet mechanism, the mud discharging mechanism comprises a mud collecting hopper, a mud collecting pipe, a mud discharging main pipe and mud discharging branch pipes, the first end of the mud collecting pipe is communicated with the water inlet mechanism, and the mud discharging branch pipes are communicated with the mud collecting pipe. The second end of the sludge collecting pipe is communicated with the sludge discharge main pipe to discharge the sludge out of the reactor. The anaerobic reactor provided by the utility model has the advantages of high treatment capacity, good mud-water separation effect and low maintenance cost.

Description

Technical Field

[0001] The utility model relates to the technical field of anaerobic reactors, in particular to an anaerobic reactor. Background Art

[0002] In order to effectively achieve mud, water and gas separation and internal circulation, the internal structure of the IC anaerobic reactor is more complicated than that of ordinary anaerobic reactors, including a two-stage three-phase separator, a gas-water separator, a gas collecting pipe, a downcomer, etc., which has high construction requirements; the design requirements of the three-phase separator are high, and unreasonable design will lead to poor mud-water separation effect in the reactor, seriously affecting the treatment efficiency of the IC reactor; the pipeline layout is complex, and the gas collecting pipe, downcomer, etc. are prone to scaling and clogging, affecting the stable operation of the IC reactor; the setting of the secondary three-phase separator of the IC anaerobic reactor is used for further sewage purification and sludge sedimentation. The sludge concentration in this area is low and the treatment capacity is poor, which generally reduces the treatment capacity of the reactor. Utility Model Content

[0003] The utility model is based on the inventor's discovery and understanding of the following facts and problems: the existing reactor has a complex structure, is easy to scale, has high maintenance costs, and has poor processing capacity. The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the utility model proposes an anaerobic reactor that omits a three-phase reactor. The anaerobic reactor has the advantages of simple structure, low scaling, low maintenance cost, good mud-water separation effect, and high processing capacity.

[0005] According to the anaerobic reactor of the embodiment of the utility model, the anaerobic reactor includes a reactor body, a mud-water separation mechanism, a water inlet mechanism, a water distribution mechanism and a mud discharge mechanism, the mud-water separation mechanism includes a mud-water separator, a water collecting bucket and a return pipe, the water collecting bucket is located at the upper part of the reactor body below the liquid level to collect the upper sludge, the mud-water separator is connected to the water collecting bucket to separate the sludge, the first end of the return pipe is connected to the bottom of the mud-water separator to return the sludge, the water inlet mechanism is used to transport raw water into the reactor body, the water inlet The mechanism is connected with the second end of the return pipe to return the sludge into the reactor body, the water distribution mechanism is connected with the water inlet mechanism to evenly distribute the raw water in the reactor body and flush the sludge in the reactor body, the mud discharge mechanism includes a mud collecting bucket, a mud collecting pipe, a mud discharge main pipe and a mud discharge branch pipe, the first end of the mud collecting pipe is connected with the water inlet mechanism, a plurality of mud discharge branch pipes are connected with the mud collecting pipe to gather the sludge to the mud collecting pipe, and the second end of the mud collecting pipe is connected with the mud discharge main pipe to discharge the sludge from the reactor body.

[0006] The anaerobic reactor according to the embodiment of the utility model has the advantages of simple structure, not easy to scale, low maintenance cost, good mud-water separation effect, and high processing capacity. The present application has the following advantages: compared with the IC reactor, the present application omits the three-phase separator, increases the reactor processing space, improves the reactor processing capacity, simplifies the pipeline layout in the reactor, reduces the area prone to scaling and clogging, helps stabilize the operation, and reduces maintenance costs.

[0007] In some embodiments, the water inlet mechanism includes a water inlet pump, a water inlet main pipe, a first water inlet branch pipe and a second water inlet branch pipe, one end of the first water inlet branch pipe is connected to the water inlet main pipe, the other end of the first water inlet branch pipe is connected to the water distribution mechanism, the first end of the second water inlet branch pipe is connected to the water inlet main pipe, and the second end of the second water inlet branch pipe is connected to the mud collection pipe.

[0008] In some embodiments, the water distribution mechanism includes a water distribution branch pipe and a water distribution control valve, a plurality of the water distribution branch pipes are connected to the first water inlet branch pipe, an extension direction of the water distribution branch pipe is tangential to the wall of the reactor body, and there is an angle between the extension direction of the water distribution branch pipe and the extension direction of any adjacent water distribution branch pipe.

[0009] In some embodiments, there are two first water inlet branch pipes, each first water inlet branch pipe corresponds to a plurality of water distribution branch pipes, and the water distribution branch pipes on the first water inlet branch pipe are symmetrical with the water distribution branch pipes on the other first water inlet branch pipe.

[0010] In some embodiments, a water inlet regulating valve is provided on the water inlet main pipe, a water inlet flow meter and a water inlet branch valve are provided on each of the first water inlet branches, a water distribution branch valve is provided on each water distribution branch pipe, and a water inlet branch valve is provided on the second water inlet branch pipe.

[0011] In some embodiments, a guide is provided in the mud-water separator, the first side of the guide is a sedimentation surface, the second side of the guide is a flow surface, the guide divides the mud-water separator into two sides, the side of the mud-water separator adjacent to the first side of the guide is connected to a water collecting pipe, the side of the mud-water separator adjacent to the second side of the guide is connected to a water outlet pipe, and the water outlet pipe is used to discharge water out of the reactor body.

[0012] In some embodiments, the angle between the extension direction of the outer wall surface of the mud collecting bucket and the horizontal plane is 30° to 60°.

[0013] In some embodiments, the mud discharge branch pipes are radially distributed in the mud collecting bucket with the mud collecting pipe as the center.

[0014] In some embodiments, a reflux regulating valve and a reflux pump are provided on the reflux pipe, the reflux pump is used to provide reflux power, and the reflux regulating valve is used to control the on-off of the reflux pipe.

[0015] In some embodiments, the top of the reactor body is a conical space for collecting biogas, and an external discharge pipe is arranged on the top of the conical space for discharging the biogas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an anaerobic reactor according to an embodiment of the utility model.

[0017] Figure 2 It is a horizontal cross-sectional schematic diagram of the mud-water separator of the anaerobic reactor according to the embodiment of the utility model.

[0018] Figure 3 It is a vertical cross-sectional schematic diagram of a mud-water separator of an anaerobic reactor according to an embodiment of the utility model.

[0019] Figure 4 It is a schematic top view of the mud discharge mechanism and water distribution mechanism of the anaerobic reactor according to the embodiment of the utility model.

[0020] Reference numerals: 1, mud discharge mechanism; 11, mud collecting bucket; 12, mud collecting pipe; 13, mud discharge main pipe; 14, mud discharge branch pipe; 15, mud discharge valve; 16, mud discharge pump;

[0021] 2. Water distribution mechanism; 21. Water distribution branch pipe; 22. Water distribution branch pipe valve;

[0022] 3. Water inlet mechanism; 31. Water inlet regulating valve; 32. Water inlet branch flowmeter; 33. First water inlet branch; 34. Water inlet branch valve; 35. Water inlet pump; 36. Second water inlet branch;

[0023] 4. Mud and water separation mechanism; 41. Water collecting bucket; 42. Water collecting pipe; 43. Mud and water separator; 431. Diverter;

[0024] 5. Reactor body; 6. Reflux pipe; 61. Reflux pump; 62. Reflux valve; 7. Water outlet pipe. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0026] According to the anaerobic reactor of the utility model, Figures 1 to 4As shown, the anaerobic reactor includes a reactor body 5, a mud-water separation mechanism 4, a water inlet mechanism 3, a water distribution mechanism 2 and a mud discharge mechanism 1. The mud-water separation mechanism 4 includes a mud-water separator 43, a water collecting bucket 41 and a return pipe 6. The water collecting bucket 41 is located at the upper part of the reactor body below the liquid level to collect the upper sludge. The mud-water separator 43 is connected to the water collecting bucket 41 to separate the sludge. The first end of the return pipe 6 is connected to the bottom of the mud-water separator 43 to return the sludge. The water inlet mechanism 3 is used to transport raw water into the reactor body. The water inlet mechanism 3 is connected to the second end of the return pipe 6 to return the sludge to the reactor body. The water distribution mechanism 2 is connected to the water inlet mechanism 3. The mechanism 3 is connected to evenly distribute the raw water to the reactor body and flush the sludge in the reactor body. The sludge discharge mechanism 1 includes a sludge collecting bucket 11, a sludge collecting pipe 12, a sludge discharge main pipe 13 and a sludge discharge branch pipe 14. The first end of the sludge collecting pipe 12 is connected to the water inlet mechanism 3. A plurality of sludge discharge branches 14 are connected to the sludge collecting pipe 12 to gather sludge to the sludge collecting pipe 12. The second end of the sludge collecting pipe 12 is connected to the sludge discharge main pipe 13 to discharge the sludge from the reactor body. A sludge discharge pump 16 and a sludge discharge valve 15 are provided on the sludge discharge main pipe 13. The biogas generated in the reactor body rises and gathers to a specific conical area at the top of the reactor body, and the biogas is discharged through the conical top external discharge pipe. The reactor body is a cylindrical reactor with a conical cover. The water inlet mechanism 3 is used to transport raw water into the reactor, the water distribution mechanism 2 evenly distributes the raw water into the reactor body and fully stirs and mixes the sludge, the sludge discharge mechanism 1 cooperates with the water distribution mechanism 2 to further stir the sludge, so that the sludge and raw water are fully mixed, ensuring the smooth progress of the anaerobic reaction effect, and the biogas produced by the reaction carries part of the sludge to float to the biogas collection area 5, the water collecting bucket 41 of the mud-water separation mechanism 4 collects the unsettled sludge on the upper part of the reactor, and sends the sludge and sewage to the mud-water separator 43 through the water collecting pipe 42, and the sludge is separated from the water in the mud-water separator 43, and the sludge flows back into the water inlet mechanism 3 through the reflux pipe 6 and is redistributed at the lower part of the reactor body. The sludge discharge mechanism 1 is opened regularly, and the sludge discharge branch pipe 14 collects the sludge at the bottom of the reactor body and sucks it into the sludge collecting pipe 12 and discharges it through the sludge discharge main pipe 13 to ensure the appropriate anaerobic sludge concentration in the reactor.

[0027] The anaerobic reactor according to the embodiment of the utility model has the advantages of simple structure, not easy to scale, low maintenance cost, good mud-water separation effect, and high processing capacity. The present application has the following advantages: compared with the IC reactor, the present application omits the three-phase separator, increases the reactor processing space, improves the reactor processing capacity, simplifies the pipeline layout in the reactor, reduces the area prone to scaling and clogging, helps stabilize the operation, and reduces maintenance costs.

[0028] In some embodiments, the water inlet mechanism 3 includes a water inlet pump 35, a water inlet main pipe, a first water inlet branch pipe 33 and a second water inlet branch pipe 36, one end of the first water inlet branch pipe 33 is connected to the water inlet main pipe, the other end of the first water inlet branch pipe 33 is connected to the water distribution mechanism 2, the first end of the second water inlet branch pipe 36 is connected to the water inlet main pipe, and the second end of the second water inlet branch pipe 36 is connected to the mud collection pipe 12.

[0029] Specifically, the water inlet pump 35 provides water inlet power for the water inlet main pipe, the first water inlet branch pipe 33 is connected to the water distribution mechanism 2 to evenly distribute the raw water at the lower part of the reactor body through the water distribution mechanism 2, and the second water inlet branch pipe 36 sends the raw water into the mud collecting branch pipe through the mud collecting pipe 12 in the reverse direction, so that the raw water and the sludge can be fully mixed, and the mud collecting branch pipe can also be backwashed to prevent the pipeline of the mud discharge mechanism 1 from being blocked. During the non-mud discharge period, the mud collecting pipe 12 of the mud discharge mechanism 1 and the evenly arranged mud collecting branch pipes cooperate with the water distribution mechanism 2, which, on the one hand, effectively promotes uniform water distribution so that the sludge does not accumulate in dead corners, and on the other hand, ensures that the mud collecting branch pipe of the mud discharge mechanism 1 is not blocked.

[0030] In some embodiments, the water distribution mechanism 2 includes a water distribution branch pipe 21 and a water distribution control valve. Multiple water distribution branch pipes 21 are connected to the first water inlet branch pipe 33. The extension direction of the water distribution branch pipe 21 is tangential to the wall of the reactor body. There is an angle between the extension direction of the water distribution branch pipe 21 and the extension direction of any adjacent water distribution branch pipe 21.

[0031] Specifically, the water distribution branch pipe 21 is tangential to the outer wall of the reactor body, and the incoming water enters along the tangential direction of the reactor body wall surface. The cooperation of multiple water distribution branch pipes 21 allows the incoming water to push the muddy water in the reactor to rotate and mix along the inner wall of the reactor body, stirring the internal sludge. Multiple water distribution branch pipes 21 can reduce dead corners and channel flows in the reactor. The angle between each water distribution branch pipe 21 and any adjacent water distribution branch pipe 21 is the same, so that multiple water flows are evenly distributed in the reactor and stir the muddy water to form a vortex.

[0032] In some embodiments, there are two first water inlet branch pipes 33 , each first water inlet branch pipe 33 corresponds to multiple water distribution branch pipes 21 , and the water distribution branch pipes 21 on a first water inlet branch pipe 33 are symmetrical with the water distribution branch pipes 21 on another first water inlet branch pipe 33 .

[0033] Specifically, the two first water inlet branch pipes 33 divide the water inlet of the water inlet main pipe into two water flows. The two first water inlet branch pipes 33 are symmetrically distributed on the outer center of the reactor body, so that the water distribution branch pipes 21 on the first water inlet branch pipe 33 and the water distribution branch pipes 21 on the other first water inlet branch pipe 33 are symmetrical in pairs. The two water distribution branch pipes 21 are regarded as a group. When distributing water, the water distribution branch pipes 21 can be opened in sequence in groups to ensure the impact force of the water distribution branch pipes 21 and increase the vortex speed formed by the water distribution.

[0034] In some embodiments, a water inlet regulating valve 31 is provided on the water inlet main pipe, a water inlet flow meter 32 and a water inlet branch pipe valve 34 are provided on each first water inlet branch pipe 33, a water distribution branch pipe valve 22 is provided on each water distribution branch pipe 21, and a water inlet branch pipe valve 34 is provided on the second water inlet branch pipe 36.

[0035] Specifically, a water inlet regulating valve 31 is provided on the water inlet main pipe to adjust the overall speed of the water inlet, and a water inlet flow meter 32 is provided on each first water inlet branch pipe 33 to observe and compare the flow difference between the two first water inlet branches 33 in real time to ensure equal distribution of the water inlet, and the water inlet branch pipe valve 34 is used to control the opening and closing of the first water inlet branch pipe 33 and the second water inlet branch pipe 36, and the water distribution branch pipe valve 22 is used to control the opening and closing of a single water distribution branch pipe 21 to realize the grouped opening of the water distribution branch pipe 21, so that the two water flows are symmetrical about the reactor to form a vortex.

[0036] In some embodiments, a guide valve 431 is provided in the mud-water separator 43, the first side of the guide valve 431 is a sedimentation surface, the second side of the guide valve 431 is a flow surface, and the guide valve 431 separates the mud-water separator 43 into two sides. The side of the mud-water separator 43 adjacent to the first side of the guide valve 431 is connected to the water collecting pipe 42, and the side of the mud-water separator 43 adjacent to the second side of the guide valve 431 is connected to the outlet pipe 7, and the outlet pipe 7 is used to discharge water out of the reactor body.

[0037] Specifically, the mud-water separator 43 has a containing cavity, and the guide 431 separates the upper part of the containing cavity so that the containing cavity is approximately a U-shaped cavity, the settling surface is an arc-shaped guide plate, and the flow surface is a vertical plane. Since the mud-water separator 43 is connected to the return pipe 6, the return pump 61 on the return pipe 6 provides a certain power, so the mud-water mixture flowing into the mud-water separator 43 has a certain flow rate. After entering the mud-water separator 43, the sludge with particularly good sedimentation will settle first, then fall to the side wall of the water collecting pipe 42 and slide to the bottom of the mud-water separator 43; the sludge with slightly poor sedimentation will continue to flow forward along the sedimentation surface of the guide 431 with the water flow, and the sedimentation surface is an arc guide plate. The mud and water flow out together at the end of the arc guide plate. Since the sludge has a high specific gravity and settles quickly, the separation of mud and water is completed; the sludge with worse sedimentation passes through the arc guide plate and is accompanied by water discharge, slowly descends to the inclined wall on the side of the mud-water separator 43 connected to the outlet pipe 7 and gradually slides to the bottom of the mud-water separator 43. The bottom of the mud-water separator 43 is connected to the return pipe 6 to send the sludge into the return pipe 6.

[0038] In some embodiments, the angle between the extension direction of the outer wall surface of the mud collecting bucket 11 and the horizontal plane is 30° to 60°.

[0039] Specifically, the downward inclination angle of the outer wall of the sludge collecting bucket 11 is the angle between the extension direction of the outer wall and the horizontal plane. When the inclination angle is within the range of 30° to 60°, the sludge collection effect on the upper part of the reactor body is most suitable.

[0040] In some embodiments, the mud discharge branch pipes 14 are radially distributed in the mud collecting bucket 11 with the mud collecting pipe 12 as the center.

[0041] Specifically, the mud discharge branch pipes 14 are radially distributed with the mud collecting pipe 12 as the center to form an annular area. The mud discharge branch pipes 14 equally divide the annular area into fan-shaped areas. Each mud discharge branch pipe 14 flushes and stirs the sludge in its corresponding fan-shaped area and can fully stir the sludge. When mud discharge is required, the mud discharge branch pipes 14 absorb the sludge in the corresponding fan-shaped area, thereby ensuring the mud discharge effect and avoiding incomplete mud discharge.

[0042] In some embodiments, a reflux regulating valve 62 and a reflux pump 61 are provided on the reflux pipe 6 . The reflux pump 61 is used to provide reflux power, and the reflux regulating valve 62 is used to control the on-off of the reflux pipe 6 .

[0043] Specifically, a reflux regulating valve 62 and a reflux pump 61 are provided on the reflux pipe 6 to control the sludge reflux speed and reflux amount.

[0044] In some embodiments, the top of the reactor body is a conical space, and an external discharge pipe is arranged on the top of the conical space to discharge biogas.

[0045] Specifically, the conical space is convenient for collecting biogas, and the external discharge pipe is arranged at the top of the space so that the biogas can automatically float up and be discharged to ensure the purity of the biogas.

[0046] The working method of the anaerobic reactor is as follows:

[0047] After the raw water (i.e., sewage entering the water inlet) is flow-controlled by the water inlet pump 35 and the water inlet regulating valve 31, it is mixed with the return muddy water in the water inlet main pipeline, and then enters the reactor body through the water inlet branch pipe; among them, the two first water inlet branch pipes 33 are respectively connected to the three water distribution branch pipes 21 on the side wall of the reactor body, and the six water distribution branch pipes 21 are symmetrically distributed on both sides of the reactor, and the water distribution branch pipes 21 are located in the tangential direction of the outer wall of the reactor body; one second water inlet branch pipe 36 is connected to the mud collecting pipe 12 at the bottom of the reactor body.

[0048] First, close the valve on the second water inlet branch pipe 36 connected to the mud collecting pipe 12, open the water inlet valves of the two first water inlet branch pipes 33 connected to the side wall water distribution pipes, adjust the flow meters and control valves on the two first water inlet branch pipes 33, and distribute the incoming water equally to the two first water inlet branch pipes 33, and then enter the corresponding water distribution branch pipes 21 respectively.

[0049] A water distribution control valve is installed on the water distribution branch pipe 21. The water distribution control valve is a solenoid valve. Each time the solenoid valves on the two water distribution branch pipes 21 that are symmetrical about the center of the reactor are opened, the water is switched to another group of two symmetrical water distribution branch pipes 21 for water inlet after a certain period of operation, and then the water is switched to the last group of two symmetrical water distribution branch pipes 21 for water inlet after a certain period of operation. In this process, since the water distribution branch pipes 21 are arranged tangent to the outer wall of the reactor body and the water distribution pipe valves are opened symmetrically, the water inlet from the water distribution branch pipes 21 pushes the muddy water in the reactor body to rotate and mix along the pool wall. In addition, since two water distribution branch pipes 21 are opened each time water is inlet, the impact force is greater than when more pipes or holes are inlet at the same time, and the surrounding sludge can be better stirred. After running for a certain period of time, the two water distribution branch pipes 21 in other parts are replaced in turn to inlet water. The water distribution branch pipes 21 are opened alternately in sequence to ensure that all parts around the bottom of the reactor body are effectively stirred, and no dead corners and channel flow problems will be formed.

[0050] When the water distribution branches 21 connected to the two first water inlet branches 33 on the side have all completed one water inlet, the valves on the two first water inlet branches 33 are closed, and the valve on the second water inlet branch 36 is opened. The second water inlet branch 36 is connected to the mud collecting pipe 12 and the mud discharge branch 14 at the bottom of the reactor body. At this time, the raw water and the returned mud water flow back to the bottom of the reactor body through the mud collecting pipe 12 and the mud discharge branch 14. Due to the impact force of the incoming water, the sludge at the bottom and middle of the reactor body is effectively stirred.

[0051] After the water inlet process of the water distribution step of switching the water distribution branch pipe 21, the muddy water in the reactor is vortex-shaped. During the muddy water vortex process, due to the fast speed and low pressure in the middle of the vortex, and the slow speed and high pressure outside the vortex, the muddy water flows from the surrounding to the center, achieving good mixing and stirring of the muddy water; since the specific gravity of the sludge at the bottom of the reactor body is higher than that of water, the sludge gathers at the center of the vortex. The water distribution step of switching the water distribution branch pipe 21 is completed, and the water distribution step of the second water inlet branch pipe 36 is operated, and water is introduced through the mud collecting pipe 12 and the mud discharge branch pipe 14 at the bottom center of the reactor body. Under the action of the water inlet pressure, the gathered sludge around the bottom center is stirred up, so that the sludge is dispersed more evenly. The water distribution step of switching the water distribution branch pipe 21 and the water distribution step of the second water inlet branch pipe 36 are circulated, on the one hand, the effective mixing of the water is achieved, and it is fully in contact with the reactor sludge, so that the reactor maintains an efficient treatment effect; on the other hand, the muddy water at the bottom of the reactor is fully stirred, and there will be no dead corners and channel flow problems of sludge accumulation, so that the reactor maintains stable operation.

[0052] The first water inlet branch pipe 33 and the second water inlet branch pipe 36 distribute water to obtain a good stirring effect, which can ensure the good operation of the bottom mud discharge system, and there will be no mud discharge dead corners when discharging mud, ensuring that the sludge is effectively replaced, thereby maintaining a good treatment effect and stability of the reactor. In addition, during the water distribution step of the second water inlet branch pipe 36, water is introduced into the mud collecting pipe 12, and the blockage of the mud collecting pipe 12 and the mud discharge branch pipe 14 can also be avoided through hydraulic impact.

[0053] The raw water enters the reactor and is stirred in a series of ways to fully contact the anaerobic sludge in the reactor. The organic matter in the raw water is converted into methane-containing biogas under the action of anaerobic microorganisms. The biogas rises and further stirs the reactor mud and water, improving the mud-water contact effect. The biogas overflows the water surface and enters the gas collection area at the top of the reactor. It is then led out of the reactor by the biogas collection pipe for collection and utilization. In this process, some biogas will adhere to the surface of the sludge, causing the sludge to float to the water surface. When the biogas leaves the surface of the sludge, the sludge will settle into the reactor again because the specific gravity of the sludge is higher than that of water. Another part of the sludge that will not settle quickly in the future will be mixed in the water and enter the mud-water separator 43 through the water collecting bucket 41 and the water collecting pipe 42 for mud-water separation.

[0054] The muddy-water mixture flows downward into the muddy-water separator 43 through the water collecting pipe 42. Since the muddy-water separator 43 is connected to the reflux pump 61, the muddy-water mixture flowing into the muddy-water separator 43 has a certain flow rate. After the muddy-water separation in the muddy-water separator 43, the sludge gathers at the bottom of the muddy-water separator 43 and flows back to the raw water inlet pipe through the reflux pipe 6, while the clean water is discharged through the outlet pipe 7 connected to the muddy-water separator 43 (the outlet pipe 7 is located at the upper part of the reactor body, higher than the water collecting bucket 41) to complete the anaerobic reactor outlet.

[0055] Mud and water return can not only maintain the concentration of microorganisms in the reactor, but also increase the water inlet, increase hydraulic stirring, avoid dead corners and short flows, and provide a good upflow for the reactor.

[0056] The sludge discharge mechanism 1 is arranged at the bottom of the reactor body, and the sludge at the bottom is sucked by the evenly distributed sludge discharge branch pipes 14, which are collected in the sludge collecting pipe 12 and then discharged from the reactor body by the sludge discharge pump 16. Regularly discharging a certain amount of anaerobic sludge can maintain the appropriate sludge concentration and sludge activity in the reactor, which is conducive to the good operation of the reactor.

[0057] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An anaerobic reactor, characterized in that: include: Reactor body; A mud-water separation mechanism, the mud-water separation mechanism comprises a mud-water separator, a water collecting bucket and a return pipe, the water collecting bucket is located at the upper part of the reactor body below the liquid level to collect upper sludge, the mud-water separator is connected to the water collecting bucket to separate the sludge, and the first end of the return pipe is connected to the bottom of the mud-water separator to return the sludge; A water inlet mechanism, the water inlet mechanism is used to transport raw water into the reactor body, the water inlet mechanism is connected to the second end of the return pipe to return the sludge into the reactor body; A water distribution mechanism, the water distribution mechanism is connected with the water inlet mechanism to evenly distribute raw water into the reactor body and flush the sludge in the reactor body; The mud discharge mechanism includes a mud collecting bucket, a mud collecting pipe, a mud discharge main pipe and a mud discharge branch pipe. The first end of the mud collecting pipe is connected to the water inlet mechanism, and a plurality of mud discharge branch pipes are connected to the mud collecting pipe to gather sludge to the mud collecting pipe. The second end of the mud collecting pipe is connected to the mud discharge main pipe to discharge the sludge from the reactor body.

2. The anaerobic reactor according to claim 1, characterized in that: The water inlet mechanism includes a water inlet pump, a water inlet main pipe, a first water inlet branch pipe and a second water inlet branch pipe, one end of the first water inlet branch pipe is connected to the water inlet main pipe, the other end of the first water inlet branch pipe is connected to the water distribution mechanism, the first end of the second water inlet branch pipe is connected to the water inlet main pipe, and the second end of the second water inlet branch pipe is connected to the mud collecting pipe.

3. The anaerobic reactor according to claim 2, characterized in that: The water distribution mechanism includes a water distribution branch pipe and a water distribution control valve. A plurality of the water distribution branch pipes are connected to the first water inlet branch pipe. The extension direction of the water distribution branch pipe is tangential to the wall of the reactor body. There is an angle between the extension direction of the water distribution branch pipe and the extension direction of any adjacent water distribution branch pipe.

4. The anaerobic reactor according to claim 2, characterized in that: There are two first water inlet branch pipes, each of which corresponds to a plurality of water distribution branch pipes, and the water distribution branch pipes on the first water inlet branch pipe are symmetrical with the water distribution branch pipes on the other first water inlet branch pipe.

5. The anaerobic reactor according to claim 2, characterized in that: A water inlet regulating valve is arranged on the water inlet main pipe, a water inlet flow meter and a water inlet branch pipe valve are arranged on each of the first water inlet branch pipes, a water distribution branch pipe valve is arranged on each water distribution branch pipe, and a water inlet branch pipe valve is arranged on the second water inlet branch pipe.

6. The anaerobic reactor according to claim 1, characterized in that: A flow guide is arranged in the mud-water separator, wherein the first side of the flow guide is a sedimentation surface, and the second side of the flow guide is a flow surface. The flow guide divides the mud-water separator into two sides. The side of the mud-water separator adjacent to the first side of the flow guide is connected to a water collecting pipe, and the side of the mud-water separator adjacent to the second side of the flow guide is connected to a water outlet pipe, and the water outlet pipe is used to discharge water out of the reactor body.

7. The anaerobic reactor according to claim 1, characterized in that: The included angle between the extension direction of the outer wall surface of the mud collecting bucket and the horizontal plane is 30° to 60°.

8. The anaerobic reactor according to claim 1, characterized in that: The mud discharge branch pipes are radially distributed in the mud collecting bucket with the mud collecting pipe as the center.

9. The anaerobic reactor according to claim 1, characterized in that: A reflux regulating valve and a reflux pump are arranged on the reflux pipe. The reflux pump is used to provide reflux power, and the reflux regulating valve is used to control the on-off of the reflux pipe.

10. The anaerobic reactor according to claim 1, characterized in that: The top of the reactor body is a conical space for collecting biogas, and an external discharge pipe is arranged on the top of the conical space for discharging the biogas.

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