CN118307127A - Anaerobic reactor - Google Patents

Abstract

The invention discloses an anaerobic reactor, which comprises a reactor body, a mud-water separation mechanism, a water inlet mechanism, a water distribution mechanism and a mud discharging mechanism, wherein the mud-water separation mechanism comprises a mud-water separator, a water collecting bucket and a return pipe, the water collecting bucket is positioned at the upper end of the reactor body and is lower than the liquid level, the mud-water separator is communicated with the water collecting bucket, the first end of the return pipe is communicated with the bottom of the mud-water separator, the water inlet mechanism is communicated with the second end of the return pipe, the water distribution mechanism is communicated with the water inlet mechanism, the mud discharging mechanism comprises a mud collecting bucket, a mud collecting pipe, a mud discharging main pipe and a mud discharging branch pipe, the first end of the mud collecting pipe is communicated with the water inlet mechanism, and the plurality of mud discharging branch pipes are communicated with the mud collecting main pipe so as to discharge mud out of the reactor. The anaerobic reactor provided by the invention has the advantages of high treatment capacity, good mud-water separation effect and low maintenance cost.

Description

Anaerobic reactor

Technical Field

The invention relates to the technical field of anaerobic reactors, in particular to an anaerobic reactor.

Background

In order to effectively realize the separation and internal circulation of mud, water and gas, the IC anaerobic reactor has a more complex internal structure than the common anaerobic reactor, and comprises a 2-level three-phase separator, a gas-water separator, a gas collecting tube, a down pipe and the like, and has high construction requirements; the design requirement of the three-phase separator is high, the unreasonable design can lead to poor mud-water separation effect of the reactor, and the treatment efficiency of the IC reactor is seriously affected; the pipeline arrangement is complex, the gas collecting pipe, the descending pipe and the like are easy to scale and block, and the running stability of the IC reactor is affected; the two-stage three-phase separator of the IC anaerobic reactor is used for further sewage purification and sludge sedimentation, and the sludge concentration in the area is low and the treatment capacity is poor, so that the treatment capacity of the reactor is reduced as a whole.

Disclosure of Invention

The present invention has been made based on the findings and knowledge of the inventors regarding the following facts and problems: the existing reactor has the disadvantages of complex structure, easy scaling, high maintenance cost and poor treatment capacity. The present invention aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the invention provides an anaerobic reactor which omits a three-phase reactor, and has the advantages of simple structure, difficult scaling, low maintenance cost, good mud-water separation effect and high treatment capacity.

According to the anaerobic reactor disclosed by the embodiment of the invention, the anaerobic reactor comprises a reactor body, a mud-water separation mechanism, a water inlet mechanism, a water distribution mechanism and a sludge discharge mechanism, wherein the mud-water separation mechanism comprises a mud-water separator, a water collecting bucket and a return pipe, the water collecting bucket is positioned at the position, lower than the liquid level, of the upper layer of sludge, the mud-water separator is connected with the water collecting bucket for separating the sludge, the first end of the return pipe is communicated with the bottom of the mud-water separator for returning the sludge, the water inlet mechanism is used for conveying raw water into the reactor body, the water inlet mechanism is communicated with the second end of the return pipe for returning the sludge into the reactor body, the water distribution mechanism is communicated with the water inlet mechanism for uniformly distributing the raw water into the reactor body and flushing the sludge in the reactor body, the sludge discharge mechanism comprises a sludge collecting bucket, a sludge collecting pipe, a main sludge discharge pipe and a sludge discharge branch pipe, wherein the first end of the sludge collecting pipe is communicated with the water inlet pipe and the sludge collecting pipe are communicated with the main pipe for collecting the sludge, and the sludge is discharged from the main pipe.

The anaerobic reactor provided by the embodiment of the application has the advantages of simple structure, difficult scaling, low maintenance cost, good mud-water separation effect and high treatment capacity. The application has the following advantages: compared with an IC (integrated circuit) reactor, the three-phase separator is omitted, the processing space of the reactor is increased, the processing capacity of the reactor is improved, the pipeline arrangement in the reactor is simplified, the area easy to scale and block is reduced, the stable operation is facilitated, and the maintenance cost is reduced.

In some embodiments, the water inlet mechanism comprises a water inlet pump, a main water inlet pipe, a first water inlet branch pipe and a second water inlet branch pipe, one end of the first water inlet branch pipe is communicated with the main water inlet pipe, the other end of the first water inlet branch pipe is communicated with the water distribution mechanism, the first end of the second water inlet branch pipe is communicated with the main water inlet pipe, and the second end of the second water inlet branch pipe is communicated with the mud collecting pipe.

In some embodiments, the water distribution mechanism comprises a water distribution branch pipe and a water distribution control valve, a plurality of water distribution branch pipes are communicated with the first water inlet branch pipe, the extending direction of the water distribution branch pipe and the wall of the reactor body are tangential, and an included angle exists between the extending direction of the water distribution branch pipe and the extending direction of any adjacent water distribution branch pipe.

In some embodiments, the first water inlet branch pipes are two, 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 pipes are symmetrical to the water distribution branch pipes on the other first water inlet branch pipes.

In some embodiments, the main water inlet pipe is provided with a water inlet regulating valve, each first water inlet branch pipe is provided with a water inlet flowmeter and a water inlet branch pipe valve, each water distribution branch pipe is provided with a water distribution branch pipe valve, and each second water inlet branch pipe is provided with a water inlet branch pipe valve.

In some embodiments, a flow director is disposed in the mud-water separator, a first side of the flow director is a settling surface, a second side of the flow director is a flowing surface, the flow director separates the mud-water separator into two sides, a side of the mud-water separator adjacent to the first side of the flow director is communicated with the water collecting pipe, a side of the mud-water separator adjacent to the second side of the flow director is communicated with a water outlet pipe, and the water outlet pipe is used for discharging water out of the reactor body.

In some embodiments, the included angle between the extending direction of the outer wall surface of the sludge collecting hopper and the horizontal plane is 30-60 degrees.

In some embodiments, the sludge discharge branch pipes are radially distributed in the sludge hopper centering on the sludge collecting pipe.

In some embodiments, the reflux pipe is provided with a reflux regulating valve and a reflux pump, the reflux pump is used for providing reflux power, and the reflux regulating valve is used for controlling the on-off of the reflux pipe.

In some embodiments, the top of the reactor body is a conical space for collecting biogas, and an outer drain pipe is arranged at the top of the conical space for draining biogas.

Drawings

FIG. 1 is a schematic view of the structure of an anaerobic reactor according to an embodiment of the present invention.

FIG. 2 is a schematic view in horizontal section of a sludge-water separator of an anaerobic reactor according to an embodiment of the present invention.

FIG. 3 is a schematic vertical sectional view of a mud-water separator of an anaerobic reactor according to an embodiment of the present invention.

FIG. 4 is a schematic top view of a sludge discharge mechanism and a water distribution mechanism of an anaerobic reactor according to an embodiment of the present invention.

Reference numerals: 1. a mud discharging mechanism; 11. a mud collecting hopper; 12. a mud collecting pipe; 13. a mud discharging main pipe; 14. a mud discharging branch pipe; 15. a mud valve; 16. a mud pump;

2. A water distribution mechanism; 21. a water distribution branch pipe; 22. a water distribution branch pipe valve;

3. A water inlet mechanism; 31. a water inlet regulating valve; 32. a water inlet branch pipe flowmeter; 33. a first water inlet branch pipe; 34. a water inlet branch pipe valve; 35. a water inlet pump; 36. a second water inlet branch pipe;

4. a mud-water separation mechanism; 41. a water collection bucket; 42. a water collecting pipe; 43. a mud-water separator; 431. a deflector;

5. a reactor body; 6. a return pipe; 61. a reflux pump; 62. a return valve; 7. and a water outlet pipe.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

According to the anaerobic reactor of the embodiment of the invention, as shown in fig. 1 to 4, the anaerobic reactor comprises a reactor body 5, a mud-water separator mechanism 4, a water inlet mechanism 3, a water distribution mechanism 2 and a mud discharging mechanism 1. The sludge-water separation mechanism 4 comprises a sludge-water separator 43, a water collecting bucket 41 and a return pipe 6, wherein the water collecting bucket 41 is positioned at the position, below the liquid level, of the upper-layer sludge, the sludge-water separator 43 is connected with the water collecting bucket 41 for separating the sludge, the first end of the return pipe 6 is communicated with the bottom of the sludge-water separator 43 for returning the sludge, the water inlet mechanism 3 is used for conveying raw water into the reactor body, the water inlet mechanism 3 is communicated with the second end of the return pipe 6 for returning the sludge into the reactor body, the water distribution mechanism 2 is communicated with the water inlet mechanism 3 for uniformly distributing the raw water into the reactor body and flushing the sludge in the reactor body, the sludge discharge mechanism 1 comprises 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 communicated with the sludge collecting main pipe 12 for collecting the sludge, the second end of the sludge collecting pipe 12 is communicated with the sludge discharge main pipe 13 for discharging the sludge out of the reactor body, and the sludge discharge pump 16 and the sludge valve 15 are arranged on the sludge discharge main pipe 13. The marsh gas generated in the reactor body rises and converges to a specific conical area at the top of the reactor body, and the marsh gas is discharged through an outer exhaust pipe at the conical top, and the reactor body is a cylindrical reactor with a conical cover top. The water inlet mechanism 3 is used for conveying raw water into the reactor, the water distribution mechanism 2 uniformly distributes the raw water into the reactor body and fully agitates and mixes the raw water with the sludge, the sludge discharge mechanism 1 is matched with the water distribution mechanism 2 to further agitate the sludge, so that the sludge and the raw water are fully mixed, the anaerobic reaction effect is ensured to be smoothly carried out, the biogas generated by the reaction floats up to the biogas collecting area 5, the water collecting bucket 41 of the sludge-water separator mechanism 4 collects the sludge which is not settled at the upper part of the reactor, the sludge and the sewage are sent into the sludge-water separator 43 through the water collecting pipe 42, the sludge is separated from the water in the sludge-water separator 43, and the sludge flows back into the lower part of the reactor body through the return pipe 6 and is redistributed at the lower part of the reactor body. The sludge discharging mechanism 1 is started regularly, and sludge at the bottom of the reactor body is sucked into the sludge collecting pipe 12 in a converging way by the sludge discharging branch pipe 14 and discharged through the sludge discharging main pipe 13, so that proper anaerobic sludge concentration in the reactor is ensured.

The anaerobic reactor provided by the embodiment of the application has the advantages of simple structure, difficult scaling, low maintenance cost, good mud-water separation effect and high treatment capacity. The application has the following advantages: compared with an IC reactor, the application omits a three-phase separator, increases the processing space of the reactor, improves the processing capacity of the reactor, simplifies the arrangement of pipelines in the reactor, reduces the area easy to be scaled and blocked, is beneficial to stable operation and reduces the maintenance cost.

In some embodiments, the water inlet mechanism 3 includes a water inlet pump 35, a main water inlet 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 communicated with the main water inlet pipe, the other end of the first water inlet branch pipe 33 is communicated with the water distribution mechanism 2, a first end of the second water inlet branch pipe 36 is communicated with the main water inlet pipe, and a second end of the second water inlet branch pipe 36 is communicated with the sludge collecting pipe 12.

Specifically, the water inlet pump 35 provides water inlet power for the main water inlet pipe, the first water inlet branch pipe 33 is connected with the water distribution mechanism 2 to distribute raw water uniformly at the lower part of the reactor body through the water distribution mechanism 2, the second water inlet branch pipe 36 reversely sends raw water into the sludge collecting branch pipe through the sludge collecting pipe 12, so that the raw water and the sludge can be fully mixed, and the sludge collecting branch pipe can be backwashed to prevent the pipeline of the sludge discharging mechanism 1 from being blocked. During the period of no sludge discharge, the sludge collecting pipe 12 of the sludge discharge mechanism 1 and the uniformly arranged sludge collecting branch pipes are matched with the water distribution mechanism 2, so that on one hand, the water distribution is effectively promoted uniformly, the sludge is prevented from generating a dead angle for accumulation, and on the other hand, the sludge collecting branch pipes of the sludge discharge mechanism 1 are prevented from being blocked.

In some embodiments, the water distribution mechanism 2 includes a water distribution branch pipe 21 and a water distribution control valve, the plurality of water distribution branch pipes 21 are communicated with the first water inlet branch pipe 33, the extending direction of the water distribution branch pipe 21 is tangential to the wall of the reactor body, and an included angle exists between the extending direction of the water distribution branch pipe 21 and the extending direction of any adjacent water distribution branch pipe 21.

Specifically, the water distribution branch pipes 21 are tangential to the outer wall of the reactor body, the inlet water enters along the tangential direction of the wall surface of the reactor body, the plurality of water distribution branch pipes 21 cooperate to enable the inlet water to push the mud water in the reactor to be rotationally mixed along the inner wall of the reactor body, the internal mud is stirred, and the plurality of water distribution branch pipes 21 can reduce dead angles and channeling in the reactor. The included angle between each water distribution branch pipe 21 and any adjacent water distribution branch pipe 21 is the same, so that a plurality of water flows are uniformly distributed in the reactor and stir muddy water to form vortex.

In some embodiments, there are two first water inlet branch pipes 33, each first water inlet branch pipe 33 corresponds to a plurality of water distribution branch pipes 21, and the water distribution branch pipes 21 on the first water inlet branch pipe 33 are symmetrical to the water distribution branch pipes 21 on the other first water inlet branch pipe 33.

Specifically, the two first water inlet branch pipes 33 divide the water inlet of the water inlet main pipe into two water flows, and the two first water inlet branch pipes 33 are symmetrically distributed at the center of the outer side of the reactor body, so that the water distribution branch pipes 21 on the first water inlet branch pipe 33 are symmetrical to the water distribution branch pipes 21 on the other first water inlet branch pipe 33 in pairs, the two water distribution branch pipes 21 are regarded as a group, the water distribution branch pipes 21 can be opened in a group in sequence when water distribution is performed, the impact force of the water distribution branch pipes 21 is ensured, and the vortex speed of water distribution formation can be improved.

In some embodiments, the water inlet main pipe is provided with a water inlet regulating valve 31, each first water inlet branch pipe 33 is provided with a water inlet flowmeter 32 and a water inlet branch pipe valve 34, each water distribution branch pipe 21 is provided with a water distribution branch pipe valve 22, and the second water inlet branch pipe 36 is provided with a water inlet branch pipe valve 34.

Specifically, the main water inlet pipe is provided with a water inlet regulating valve 31 for regulating the overall water inlet speed, each first water inlet branch pipe 33 is provided with a water inlet flowmeter 32 which can observe and compare the flow difference of the two first water inlet branch pipes 33 in real time to ensure equal water inlet distribution, the water inlet branch pipe valve 34 is used for controlling the opening and closing of the first water inlet branch pipes 33 and the second water inlet branch pipes 36, and the water distribution branch pipe valve 22 is used for controlling the opening and closing of the single water distribution branch pipe 21 to realize the grouping opening of the water distribution branch pipes 21, so that two water flows are symmetrical relative to the reactor so as to form vortex.

In some embodiments, the separator 43 is provided with a deflector 431, a first side of the deflector 431 is a settling surface, a second side of the deflector 431 is a flowing surface, the deflector 431 separates the separator 43 into two sides, one side of the separator 43 adjacent to the first side of the deflector 431 is communicated with the water collecting pipe 42, one side of the separator 43 adjacent to the second side of the deflector 431 is communicated with the water outlet pipe 7, and the water outlet pipe 7 is used for discharging water out of the reactor body.

Specifically, the mud-water separator 43 has a receiving chamber, and the deflector 431 partitions an upper portion of the receiving chamber so that the receiving chamber approximates a U-shaped chamber, the settling surface is an arc-shaped deflector, and the flow surface is a vertical plane. Since the mud-water separator 43 is connected with the return pipe 6, the return pump 61 on the return pipe 6 provides certain power, so that the mud-water mixture flowing into the mud-water separator 43 has certain flow rate, and when the mud-water mixture enters the mud-water separator 43, the sludge with particularly good sedimentation property can firstly settle and then fall to the side wall of one side of the water collecting pipe 42 and slide to the bottom of the mud-water separator 43; the sludge with slightly poorer settleability can flow along with the water flow along the settling surface of the deflector 431, the settling surface is an arc-shaped deflector, and the muddy water at the tail end of the arc-shaped deflector flows out together, so that the sludge is settled quickly due to the large specific gravity, and the separation of the muddy water is completed; the sludge with poorer sedimentation property passes through the arc-shaped guide plate and is slowly lowered onto the inclined wall of the sludge-water separator 43 on the side connected with the water outlet pipe 7 along with water outlet, and gradually slides to the bottom of the sludge-water separator 43. The bottom of the mud-water separator 43 communicates with the return pipe 6 to feed sludge into the return pipe 6.

In some embodiments, the included angle between the extending direction of the outer wall surface of the sludge hopper 11 and the horizontal plane is 30-60 degrees.

Specifically, the downward inclination angle of the outer wall surface of the sludge hopper 11 is the included angle between the extending direction of the outer wall surface and the horizontal plane, and the sludge collection effect on the upper part of the reactor body is most suitable when the inclination angle is within the range of 30-60 degrees.

In some embodiments, the sludge discharge branches 14 are radially distributed in the sludge hopper 11 centering on the sludge collecting pipe 12.

Specifically, the mud discharging branch pipes 14 are radially distributed by taking the mud collecting pipe 12 as the center to form an annular area, the annular area is equally divided into fan-shaped areas by the mud discharging branch pipes 14, and each mud discharging branch pipe 14 flushes and agitates the mud in the corresponding fan-shaped area, so that the mud can be fully agitated, and when the mud discharging is needed, the mud discharging branch pipes 14 adsorb the mud in the corresponding fan-shaped area, so that the mud discharging effect is ensured, and the incomplete mud discharging is avoided.

In some embodiments, the reflux tube 6 is provided with a reflux regulating valve 62 and a reflux pump 61, the reflux pump 61 is used for providing reflux power, and the reflux regulating valve 62 is used for controlling the on-off of the reflux tube 6.

Specifically, the return pipe 6 is provided with a return flow regulating valve 62 and a return flow pump 61 to control the return flow speed and the return flow amount of the sludge.

In some embodiments, the top of the reactor body is a conical space, and an outer drain pipe is arranged at the top of the conical space for discharging biogas.

Specifically, the conical space is convenient for collecting the biogas, and the outer discharge pipe is arranged at the top of the space, so that the biogas can be automatically floated and discharged to ensure the purity of the biogas.

The working method of the anaerobic reactor is as follows:

After the flow of raw water (i.e. sewage entering from a water inlet) is regulated by a water inlet pump 35 and a water inlet regulating valve 31, the raw water is mixed with the return mud water in a water inlet main pipe, and then enters the reactor body through a water inlet branch pipe; wherein, the 2 first water inlet branch pipes 33 are respectively connected with 3 water distribution branch pipes 21 and 6 water distribution branch pipes 21 on the side wall of the reactor body, and the water distribution branch pipes 21 are symmetrically distributed on the two sides of the reactor, and the water distribution branch pipes 21 are positioned in the tangential direction of the outer wall of the reactor body; and 1 second water inlet branch pipe 36 is connected with the mud collecting pipe 12 at the bottom of the reactor body.

Firstly, the valve on the second water inlet branch pipe 36 connected with the sludge collecting pipe 12 is closed, the water inlet valves of the 2 first water inlet branch pipes 33 connected with the side wall water distribution pipe are opened, the flow meters and the regulating valves on the 2 first water inlet branch pipes 33 are regulated and controlled, the water inlet is equally distributed to the 2 first water inlet branch pipes 33, and then the water inlet enters the corresponding water distribution branch pipes 21 respectively.

The water distribution branch pipes 21 are provided with water distribution control valves, the water distribution control valves are electromagnetic valves, the electromagnetic valves on 2 water distribution branch pipes 21 symmetrical with respect to the center of the reactor are opened each time, the water distribution control valves are switched to the other group of 2 symmetrical water distribution branch pipes 21 for water inflow after running for a certain time, and the water distribution control valves are switched to the last group of 2 symmetrical water distribution branch pipes 21 for water inflow after running for a certain time; in the process, as the water distribution branch pipes 21 are tangentially arranged with the outer wall of the reactor body and the water distribution pipe valves are symmetrically opened, the inflow water from the water distribution branch pipes 21 pushes the sludge and water in the reactor body to be mixed in a rotating way along the pool wall. In addition, since two water distribution branch pipes 21 are opened every time water is fed, the surrounding sludge can be better stirred as compared with the impact force when more pipes or holes are fed simultaneously. After running for a certain time, the two water distribution branch pipes 21 at other positions are sequentially replaced to feed water, and the water distribution branch pipes 21 are sequentially and alternately opened, so that the effective stirring of all the positions around the bottom of the reactor body can be ensured, and the problems of dead angles, channeling and the like can not be formed.

After the water distribution branch pipes 21 connected with the two first water inlet branch pipes 33 on the side face are all fed with water once, the valves on the two first water inlet branch pipes 33 are closed, the valves on the second water inlet branch pipes 36 are opened, the second water inlet branch pipes 36 are connected with the sludge collecting pipe 12 and the sludge discharging branch pipes 14 at the bottom of the reactor body, at the moment, raw water and return muddy water flow back to the bottom of the reactor body through the sludge collecting pipe 12 and the sludge discharging branch pipes 14, and due to the impact force of the water inlet, the effective stirring of the sludge at the bottom and the middle of the reactor body is realized.

In the water inlet process of the water distribution step of the water distribution branch pipe 21, muddy water in the reactor is in a vortex shape, and in the muddy water vortex process, the muddy water flows from the periphery to the center to realize good mixing and stirring of the muddy water due to the fact that the speed of the middle part of the vortex is high, the pressure is low, and the speed of the outer side of the vortex is high; because the sludge is higher in specific gravity than water at the bottom of the reactor body, the sludge gathers in the vortex center. The water distribution step of the switching water distribution branch pipe 21 is finished, the water distribution step of the second water inlet branch pipe 36 is operated, water is fed through the sludge collecting pipe 12 and the sludge discharging branch pipe 14 at the center of the bottom of the reactor body, and the collected sludge around the center of the bottom is stirred under the action of the water inlet pressure, so that the sludge is dispersed more uniformly. The steps of switching the water distribution of the water distribution branch pipe 21 and the water distribution of the second water inlet branch pipe 36 are circularly carried out, so that on one hand, the effective mixing of the water inlet is realized, the water is fully contacted with the sludge of the reactor, and the high-efficiency treatment effect of the reactor is maintained; on the other hand, the sludge and water at the bottom of the reactor are fully stirred, and the problems of sludge accumulation dead angles and channeling are avoided, so that the reactor can maintain stable operation.

The first water inlet branch pipe 33 and the second water inlet branch pipe 36 are distributed with good stirring effect, so that a bottom mud discharging system can be guaranteed to operate well, mud discharging dead angles can not occur during mud discharging, effective replacement of mud is guaranteed, and good treatment effect and stability of the reactor are maintained. In addition, in the water distribution step of the second water inlet branch pipe 36, the mud collecting pipe 12 is subjected to water inlet, and the blockage of the mud collecting pipe 12, the mud discharging branch pipe 14 and the like can be avoided through hydraulic impact.

Raw water enters the reactor and is fully contacted with anaerobic sludge in the reactor through a series of stirring, organic matters in the raw water are converted into methane-containing biogas and the like under the action of anaerobic microorganisms, the biogas rises, the mud water of the reactor is further stirred, the mud water contact effect is improved, the biogas overflows out of the water surface, enters a top gas collecting area of the reactor, and is then guided out of the reactor through a biogas collecting pipe for collection and utilization. In the process, part of marsh gas can be attached to the surface of the sludge, so that the sludge floats to the water surface, and when the marsh gas is separated from the surface of the sludge, the sludge can be settled into the reactor again because the specific gravity of the sludge is higher than that of the water; and other part of the sludge which is subjected to the rapid sedimentation in the future is mixed in water and enters a mud-water separator 43 through a water collecting bucket 41 and a water collecting pipe 42 for mud-water separation.

The slurry-water mixture flows down into the slurry-water separator 43 through the water collecting pipe 42, and the slurry-water mixture flowing into the slurry-water separator 43 has a certain flow rate because the slurry-water separator 43 is connected to the reflux pump 61. After mud-water separation is carried out through the mud-water separator 43, sludge is gathered to the bottom of the mud-water separator 43, and flows back to a water inlet main pipe of raw water through a return pipe 6, and clear water is led out through a water outlet pipe 7 connected with the mud-water separator 43 (a water outlet pipe 7 port is positioned at the upper part of the reactor body and is higher than a water collecting bucket 41) to finish water outlet of the anaerobic reactor.

The mud water reflux not only can maintain the microorganism concentration in the reactor, but also can increase the water inflow, increase the hydraulic stirring, avoid dead angles and short flows, and provide good upward flow for the reactor.

The sludge discharging mechanism 1 arranged at the bottom of the reactor body sucks the sludge at the bottom by the sludge discharging branch pipes 14 which are uniformly distributed, gathers the sludge in the sludge collecting pipe 12 and then discharges the sludge out of the reactor body by the sludge discharging pump 16. And a certain amount of anaerobic sludge is discharged periodically, so that the proper sludge concentration and sludge activity in the reactor can be maintained, and the good operation of the reactor is facilitated.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those skilled in the art without departing from the scope of the invention.

Claims (10)

1. An anaerobic reactor, comprising:

A reactor body;

The mud-water separation mechanism comprises a mud-water separator, a water collecting bucket and a return pipe, the water collecting bucket is positioned at the upper part of the reactor body and is lower than the liquid level to collect upper-layer sludge, the mud-water separator is connected with the water collecting bucket in a general way to separate sludge, and the first end of the return pipe is communicated with the bottom of the mud-water separator to return the sludge;

The water inlet mechanism is used for conveying raw water into the reactor body and is communicated with the second end of the return pipe so as to return the sludge into the reactor body;

The water distribution mechanism is communicated with the water inlet mechanism to uniformly distribute raw water into the reactor body and wash sludge in the reactor body;

The mud discharging mechanism comprises a mud collecting hopper, a mud collecting pipe, a mud discharging main pipe and a mud discharging branch pipe, wherein the first end of the mud collecting pipe is communicated with the water inlet mechanism, a plurality of mud discharging branch pipes are communicated with the mud collecting pipe to collect mud to the mud collecting pipe, and the second end of the mud collecting pipe is communicated with the mud discharging main pipe to discharge the mud out of the reactor body.

2. The anaerobic reactor according to claim 1, wherein the water inlet mechanism comprises a water inlet pump, a main water inlet pipe, a first water inlet branch pipe and a second water inlet branch pipe, one end of the first water inlet branch pipe is communicated with the main water inlet pipe, the other end of the first water inlet branch pipe is communicated with the water distribution mechanism, the first end of the second water inlet branch pipe is communicated with the main water inlet pipe, and the second end of the second water inlet branch pipe is communicated with the sludge collecting pipe.

3. The anaerobic reactor according to claim 2, wherein the water distribution mechanism comprises a water distribution branch pipe and a water distribution control valve, a plurality of the water distribution branch pipes are communicated with the first water inlet branch pipe, the extending direction of the water distribution branch pipe is tangential to the wall of the reactor body, and an included angle exists between the extending direction of the water distribution branch pipe and the extending direction of any adjacent water distribution branch pipe.

4. The anaerobic reactor according to claim 2, wherein the number of the first water inlet branch pipes is two, 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.

5. An anaerobic reactor according to claim 2, wherein a water inlet regulating valve is arranged on the water inlet main pipe, a water inlet flowmeter and a water inlet branch pipe valve are arranged on each first water inlet branch pipe, 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, wherein a deflector is provided in the slurry-water separator, a first side of the deflector is a sedimentation surface, a second side of the deflector is a flow surface, the deflector separates the slurry-water separator into two sides, a side of the slurry-water separator adjacent to the first side of the deflector is in communication with the water collection pipe, a side of the slurry-water separator adjacent to the second side of the deflector is in communication with a water outlet pipe for discharging water out of the reactor body.

7. An anaerobic reactor according to claim 1, wherein the angle between the extension direction of the outer wall surface of the sludge hopper and the horizontal plane is 30-60 °.

8. The anaerobic reactor according to claim 1, wherein said sludge discharge branch pipes are radially distributed in said sludge hopper centering on said sludge collecting pipe.

9. The anaerobic reactor according to claim 1, wherein a reflux regulating valve and a reflux pump are arranged on the reflux pipe, the reflux pump is used for providing reflux power, and the reflux regulating valve is used for controlling the on-off of the reflux pipe.

10. The anaerobic reactor according to claim 1, wherein the top of the reactor body is a conical space for collecting biogas, and an outer drain pipe is provided at the top of the conical space for draining biogas.