CN220449931U - Flow distribution well for garbage leachate treatment and garbage leachate treatment system - Google Patents

Abstract

The utility model discloses a flow distribution well for garbage leachate treatment and a garbage leachate treatment system, wherein the flow distribution well comprises: the anaerobic water pipe is used for communicating the anaerobic module water outlet and the distribution tank, the biochemical water pipe is used for communicating the distribution tank and the biochemical module water inlet, the nitrification liquid return pipe is used for communicating the nitrification liquid outlet of the biochemical module and the distribution tank, and the flow distribution well is also used for redistributing the returned nitrification liquid. The flow distribution well disclosed by the utility model realizes the distribution of the effluent between the anaerobic module and the biochemical module, is convenient for switching production lines, can better meet production requirements, and has more stable and controllable sewage flow. In addition, the flow distribution well has the function of redistributing the returned nitrifying liquid, and the nitrifying liquid returned in the biochemical module is collected and redistributed uniformly, so that the liquid level of the nitrifying liquid in the biochemical module is regulated and controlled more conveniently, and the operation mode is also more flexible.

Description

Flow distribution well for garbage leachate treatment and garbage leachate treatment system

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to a flow distribution well for garbage leachate treatment and a garbage leachate treatment system.

Background

The garbage can generate a large amount of leachate due to contact with rainwater or other liquids in the process of stacking or burying, the leachate is a high-concentration organic liquid, and pollutants in the leachate are generally removed through anaerobic technology and biochemical technology in the process of treating the leachate.

In the related art, a landfill leachate treatment system generally comprises a plurality of parallel production lines, wherein the parallel production lines are composed of a plurality of anaerobic tanks and a plurality of biochemical tanks which are connected in parallel, the anaerobic tanks are communicated with the biochemical tanks one to one, and the landfill leachate treated by the anaerobic process directly flows into the biochemical tanks. However, since the effluent precipitation amount of the anaerobic tank is large, the flow is unstable, the one-to-one communication mode cannot effectively control the flow entering the biochemical tanks from the anaerobic tank, and the distribution and switching of the leachate after anaerobic treatment among a plurality of parallel biochemical tanks cannot be realized, so that the treatment function is single. In addition, in the biochemical process, the nitrifying liquid is usually required to flow back, and in the related technology, the nitrifying liquid in the denitrification stage is directly flowed back to the corresponding nitrifying pond, so that redistribution of the nitrifying liquid between the biochemical ponds cannot be realized, and the actual requirements of process operation cannot be effectively met.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. To this end, in a first aspect, embodiments of the present utility model provide a flow distribution well for landfill leachate treatment for achieving the distribution of leachate between an anaerobic module and a biochemical module, and the return of nitrified liquid. In a second aspect, embodiments of the present utility model provide a landfill leachate treatment system.

A flow distribution well for landfill leachate treatment according to an embodiment of the first aspect of the present utility model is disposed between an anaerobic module and a biochemical module of a landfill leachate treatment system, for distributing effluent of the anaerobic module into the biochemical module, the flow distribution well comprising: the anaerobic water pipe is used for communicating the anaerobic module water outlet and the distribution tank, the biochemical water pipe is used for communicating the distribution tank and the biochemical module water inlet, the nitrification liquid return pipe is used for communicating the nitrification liquid outlet of the biochemical module and the distribution tank, and the flow distribution well is also used for redistributing the returned nitrification liquid.

The flow distribution well provided by the embodiment of the utility model realizes the distribution of the effluent between the anaerobic module and the biochemical module, is convenient for switching the production line, can better meet the production requirement, and has more stable and controllable sewage flow. In addition, the flow distribution well has the function of redistributing the returned nitrifying liquid, and the nitrifying liquid returned in the biochemical module is collected and redistributed uniformly, so that the liquid level of the nitrifying liquid in the biochemical module is regulated and controlled more conveniently, and the operation mode is also more flexible.

According to some embodiments of the utility model, the flow distribution well further comprises a sewer pipe for communicating the sewer outlet with the distribution tank, the flow distribution well further being adapted for distributing sewage from the sewer tank into the biochemical module via the biochemical water pipe.

According to some embodiments of the utility model, the anaerobic water pipes are a plurality of, and the anaerobic water pipes are respectively communicated with a plurality of anaerobic tanks of the anaerobic module in a one-to-one correspondence manner; and/or the biochemical water pipes are in a plurality, and the biochemical water pipes are respectively communicated with the biochemical units of the biochemical module in a one-to-one correspondence.

According to some embodiments of the utility model, the flow distribution well further comprises a vent conduit in communication with the top of the distribution tank for venting.

According to some embodiments of the utility model, the flow distribution well further comprises a sludge discharge pipe in communication with the bottom of the distribution tank for discharging sludge.

According to some embodiments of the utility model, the distribution tank comprises a water outlet weir and a reservoir, wherein the water outlet weir and the reservoir are adjacently arranged, a shared tank wall is arranged between the water outlet weir and the reservoir, sewage in the reservoir flows into the water outlet weir, the anaerobic water pipe and the nitrifying liquid return pipe are communicated with the reservoir, and the biochemical water pipe is communicated with the water outlet weir.

An embodiment of the second aspect of the present utility model provides a landfill leachate treatment system, comprising:

an anaerobic module; a biochemical module; and a flow distribution well, the flow distribution well being as described in the first aspect above, the flow distribution well being connected between the anaerobic module and the biochemical module and downstream of the anaerobic module.

According to some embodiments of the utility model, the anaerobic module comprises a plurality of anaerobic tanks, the flow distribution well comprises a plurality of anaerobic water pipes, and the plurality of anaerobic water pipes are respectively communicated with the plurality of anaerobic tanks in a one-to-one correspondence; the biochemical module comprises a plurality of biochemical units which are connected in parallel, each biochemical unit comprises a denitrification tank and a nitrification tank which are connected in series, the flow distribution well comprises a plurality of biochemical water pipes, and the biochemical water pipes are respectively communicated with the denitrification tanks in a one-to-one correspondence manner.

According to some embodiments of the utility model, the number of anaerobic tanks is different from the number of biochemical units.

According to some embodiments of the utility model, the flow distribution well further comprises a sewer pipe for communicating the outlet of the sewer tank with the distribution tank.

Drawings

FIG. 1 is a schematic view of a flow distribution well according to an embodiment of the present utility model.

FIG. 2 is a top view of a flow distribution well according to an embodiment of the present utility model.

FIG. 3 is a schematic diagram of a landfill leachate treatment system according to an embodiment of the present utility model.

Reference numerals: the flow distribution well 100, the distribution tank 110, the water outlet weir 111, the water reservoir 112, the anaerobic water pipe 120, the biochemical water pipe 130, the nitrifying liquid return pipe 140, the sewage pipe 150, the exhaust pipe 160, the sludge discharge pipe 170, the anaerobic module 200, the anaerobic tank 210, the biochemical module 300, the biochemical unit 310, the denitrification tank 311, the nitrifying tank 312, the odor system 400 and the sewage tank 500.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, 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 utility model and should not be construed as limiting the utility model.

A flow distribution well 100 for landfill leachate treatment and a landfill leachate treatment system according to an embodiment of the present utility model are described below with reference to fig. 1 to 3.

As shown in fig. 3, the landfill leachate treatment system includes a flow distribution well 100, an anaerobic module 200, and a biochemical module 300. The flow distribution well 100 is connected between the anaerobic module 200 and the biochemical module 300 and is located downstream of the anaerobic module 200. The flow distribution well 100 is used to distribute the effluent of the anaerobic module 200 into the biochemical module 300.

As shown in fig. 1 and 2, the flow distribution well 100 includes a distribution tank 110, an anaerobic water pipe 120, a biochemical water pipe 130, and a nitrifying liquid return pipe 140, wherein the anaerobic water pipe 120 is used for communicating a water outlet of the anaerobic module 200 with the distribution tank 110, the biochemical water pipe 130 is used for communicating the distribution tank 110 with a water inlet of the biochemical module 300, the nitrifying liquid return pipe 140 is used for communicating a nitrifying liquid outlet of the biochemical module 300 with the distribution tank 110, and the flow distribution well 100 is also used for redistributing the nitrifying liquid returned.

Anaerobic effluent after anaerobic treatment in the anaerobic module 200 is discharged into the distribution tank 110 through the anaerobic water pipe 120 and is gathered in the distribution tank 110, the anaerobic effluent in the distribution tank 110 is distributed into the biochemical module 300 through the biochemical water pipe 130 according to a preset proportion and a preset flow, the distribution of the effluent is realized, and the flow of sewage flowing to the biochemical module 300 from the distribution tank 110 is stable and controllable. In addition, the distribution ratio of the effluent among the biochemical units of the biochemical module 300 can be controlled by the arrangement of the distribution tank 110, so that the production line can be conveniently switched, different water treatment requirements can be met, the anaerobic effluent can be evenly distributed among the biochemical units, the anaerobic effluent can also flow into part of the biochemical units, and the other biochemical units stop water inflow, so that the production condition requirements can be met.

In addition, in the distribution tank 110, a part of the sediment in the sewage is deposited at the bottom of the tank under the action of gravity, and the anaerobic sludge is trapped, so that the anaerobic sludge entering the biochemical module 300 is reduced to some extent.

The nitrifying liquid reflux pipe 140 reflux nitrifying liquid of the biochemical module 300 into the flow distribution well 100 and redistribute nitrifying liquid into the subsequent biochemical module 300 for biochemical process, thereby realizing unified redistribution of nitrifying liquid and convenient regulation and control of nitrifying liquid level in each biochemical unit 310 of the biochemical module 300.

The garbage leachate treatment system provided by the embodiment of the utility model realizes the distribution of effluent between the anaerobic module and the biochemical module by arranging the flow distribution well, is convenient for switching production lines, can better meet production requirements, and has more stable and controllable sewage flow. In addition, the flow distribution well has the function of redistributing the returned nitrifying liquid, and the nitrifying liquid returned in the biochemical module is collected and redistributed uniformly, so that the liquid level of the nitrifying liquid in the biochemical module is regulated and controlled more conveniently, and the operation mode is also more flexible.

In some embodiments, the anaerobic module 200 is configured with a plurality of anaerobic tanks 210, the anaerobic water pipes 120 are a plurality of, and the plurality of anaerobic water pipes 120 are respectively communicated with the plurality of anaerobic tanks 210 of the anaerobic module 200 in a one-to-one correspondence manner, that is, the anaerobic effluent in each anaerobic tank 210 in the anaerobic module 200 is respectively gathered into the distribution tank 110 through the anaerobic water pipes 120 correspondingly communicated with the anaerobic water pipes.

In some embodiments, the biochemical module 300 is configured with a plurality of biochemical units 310, the biochemical water pipes 130 are also a plurality of nitrified liquid return pipes 140, and the biochemical water pipes 130 are respectively communicated with the biochemical units 310 of the biochemical module 300 in a one-to-one correspondence.

Specifically, the biochemical unit 310 includes a denitrification tank 311 and a nitrification tank 312 connected in series, and the nitrification tank 312 is located downstream of the denitrification tank 311. The biochemical water pipes 130 are communicated with the denitrification tanks 311 in a one-to-one correspondence, and the nitrifying liquid return pipes 140 are communicated with the nitrifying tanks 312 in a one-to-one correspondence. The distribution tank 110 distributes anaerobic effluent into the denitrification tank 311 for denitrification reaction according to a certain proportion through a plurality of biochemical water pipes 130, then enters the corresponding nitrification tanks 312 for nitrification reaction, part of nitrified liquid in each nitrification tank 312 is gathered into the distribution tank 110 through the corresponding nitrified liquid return pipe 140, and is redistributed by the distribution tank 110, namely, the nitrified liquid which is returned by the part is redistributed to each denitrification tank 311 through the biochemical water pipes 130 for secondary biochemical reaction.

In some preferred embodiments, the landfill leachate treatment system employs a multiple series parallel scheme, that is, the anaerobic module 200 is configured with a plurality of anaerobic tanks 210, and the biochemical module 300 is also configured with a plurality of biochemical units 310. And it is often the case that the number of anaerobic tanks 210 is different from the number of biochemical units 310 due to the limitation of the current treatment scale of the anaerobic tanks 210 and biochemical units 310.

By way of example, FIG. 3 shows a 300T/D process scale landfill leachate treatment system with an anaerobic module 200 provided with three anaerobic tanks 210 and a biochemical module 300 provided with two sets 150T/D biochemical units 310. The flow distribution well 100 is disposed between the anaerobic module 200 and the biochemical module 300, and communicates with each of the anaerobic tanks 210 and the biochemical units 310. The flow distribution well 100 is used to reasonably distribute the effluent from the three anaerobic tanks 210 into the two biochemical units 310 while also ensuring that the amount of water is adjustable. When the garbage leachate treatment system is in normal operation, the flow distribution well 100 is used for evenly distributing anaerobic effluent to the two subsequent biochemical modules 310, and when a biochemical list is in operation, anaerobic effluent is completely input into the same biochemical unit 310 and the other biochemical unit stops water inflow by controlling the valves of the flow distribution well 100, so as to meet the production condition requirement.

Further, the fluid levels in the two series of biochemical units 310 can also be adjusted by the flow distribution well 100 and the mutual circulation of water between the biochemical units 310 is achieved. For example, when one of the biochemical units 310 requires low level operation or even drain service, the other biochemical unit requires high level operation. On the one hand, the flow distribution well 100 reduces or cuts off the water quantity flowing into the first biochemical unit 310 through the regulating valve, meanwhile, the nitrified liquid of the biochemical unit 310 flows back to the flow distribution well 100 through the corresponding nitrified liquid return pipe 140, and the nitrified liquid is input into the other biochemical unit 310 through the biochemical water pipe 130 by the flow distribution well 100, so that the liquid level in the biochemical unit 310 for guiding out the nitrified liquid is gradually reduced, and the liquid level in the other biochemical unit 310 is raised, thereby meeting the actual requirement of process operation.

In some cases, in addition to the need to treat landfill leachate, landfill treatment plants also need to cooperatively treat wastewater such as domestic sewage, flushing water, etc. Since the concentration of organic suspended matters (COD, TN) in domestic sewage and flushing water is far lower than that of garbage leachate, anaerobic treatment is not required, in the related art, the domestic sewage, flushing water and other waste water are usually directly connected into the biochemical module, and the waste water is controlled to enter different production lines by manually switching valves, but the waste water cannot be uniformly distributed in this way, and the waste water directly flows into the biochemical module 300 to cause larger load impact on the biochemical module 300.

Thus, in some embodiments of the utility model, the landfill leachate treatment system includes a lagoon 500 for storing domestic sewage. The flow distribution well 100 comprises a sewage pipe 150, the sewage pipe 150 is used for communicating an outlet of the sewage tank 500 with the distribution tank 110, the flow distribution well 100 is also used for distributing domestic sewage in the sewage tank 500 into the biochemical module 300 through the biochemical water pipe 130, that is, the domestic sewage in the sewage tank 500 can enter the flow distribution well 100 through the sewage pipe 150 and pass through the anaerobic module 200, and the domestic sewage is distributed into the downstream biochemical module 300 through the flow distribution well 100, so that unified distribution of the waste water is realized, different process requirements can be met, and in addition, the flow distribution well 100 can play a role in transferring, so that load impact along with the biochemical module 300 is reduced.

As an example, as shown in fig. 1 to 3, the domestic sewage in the sewage tank 500 is discharged into the distribution tank 110 through the sewage pipe 150, and flows into each biochemical unit 310 of the biochemical module 300 according to a preset ratio after being uniformly mixed with the anaerobic effluent and the reflux nitrifying liquid in the distribution tank 110, thereby not only meeting the flow distribution requirement, but also reducing the direct load impact of the domestic sewage on the biochemical module 300.

The landfill leachate is decomposed under the biological and chemical decomposition effects, so that toxic and harmful gases such as methane and the like are generated, and the landfill leachate subjected to anaerobic treatment also generates toxic and harmful gases such as methane, hydrogen sulfide and the like. In order to timely discharge toxic and harmful gases, the toxic and harmful gases are prevented from overflowing, and safety accidents occur. In some embodiments, as shown in fig. 1-3, the flow distribution well 100 further includes a vent conduit 160, the vent conduit 160 communicating with the top of the distribution tank 110 for venting.

Specifically, as shown in fig. 1 and 2, the flow distribution well 100 is provided with an exhaust pipe 160, and the exhaust pipe 160 is used to exhaust the harmful gas in the distribution tank 110. It should be noted that the exhaust pipe 160 is disposed at or near the top of the distribution tank 110, so as to exhaust the harmful gas more effectively.

The anaerobic treated landfill leachate still carries a large amount of large-particle pollutants, and domestic sewage may also carry partial sludge, and the landfill leachate and the domestic sewage are mixed in the distribution tank 110, so that the large-particle pollutants and the sludge can be deposited and distributed at the bottom of the distribution tank 110 under the action of gravity. In order to avoid clogging of the piping due to accumulation of sludge, the distribution tank 110 needs to be periodically discharged. Thus, in some embodiments, the flow distribution well 100 further includes a mud discharge conduit 170, the mud discharge conduit 170 communicating with the bottom of the distribution tank 110 for discharging mud.

Specifically, as shown in fig. 2, the sludge discharge pipe 170 is provided with a plurality of branch pipes, so that the sludge can be discharged from a plurality of positions, and the sludge discharge effect is better.

In some embodiments, the distribution tank 110 includes a water outlet weir 111 and a water reservoir 112, the water outlet weir 111 and the water reservoir 112 being disposed adjacent to each other with a common tank wall therebetween, sewage in the water reservoir 112 flowing into the water outlet weir 111, the anaerobic water conduit 120, the nitrifying liquid return conduit 140 and the sewage conduit 150 all communicating with the water reservoir 112, and the biochemical water conduit 130 communicating with the water outlet weir 111. The water outlet weir 111 is used to stabilize the water outlet flow.

As an example, as shown in fig. 2, the distribution tank 110 includes a water reservoir 112 and two water outlet weirs 111 disposed at both sides of the water reservoir 112, respectively. Wherein the anaerobic water pipe 120, the sewage pipe 150 and the nitrifying liquid return pipe 140 are all communicated with the reservoir 112, and each water outlet weir 111 is communicated with one biochemical water pipe 130. A wall is provided between the reservoir 112 and the weir 111 for use. During the distribution, the mixed sewage of the anaerobic effluent, the domestic sewage and the reflux nitrified liquid in the reservoir 112 is discharged into the effluent weir 111 in advance, and the mixed sewage is distributed to the next stage (the biochemical module 300) by the effluent weir 111, thereby contributing to the improvement of the stability of the effluent of the distribution tank 110. Wherein, the two biochemical water pipes 130 respectively supply water to different biochemical units 310, and the water outlet flow is more stable.

The following describes in detail a landfill leachate treatment system according to an embodiment of the present utility model with reference to fig. 3.

As shown in fig. 3, the landfill leachate treatment system includes: an anaerobic module 200, a biochemical module 300, and a flow distribution well 100. The flow distribution well 100 is the flow distribution well 100 described in any of the embodiments above, the flow distribution well 100 being connected between the anaerobic module 200 and the biochemical module 300 and downstream of the anaerobic module 200.

The sewage treated by the anaerobic module 200 flows into the flow distribution well 100, and when the sewage is distributed to the next biochemical module 300 through the flow distribution well 100, the flow distribution well 100 can stabilize the flow flowing into the biochemical module 300 from the anaerobic module 200, reduce the impurity entering the biochemical module 300, and make the garbage leachate treatment process more stable and reliable.

In this embodiment, as shown in fig. 3, the anaerobic module 200 includes three anaerobic tanks 210, the flow distribution well 100 includes three anaerobic water pipes 120, and the three anaerobic water pipes 120 are in one-to-one communication with the three anaerobic tanks 210. The flow distribution well 100 includes two biochemical water lines 130 and two nitrified liquid return lines 140, and the biochemical module 300 includes two series of biochemical units 310. Each biochemical unit 310 comprises a denitrification tank 311 and a nitrification tank 312 which are connected in series, and two biochemical water pipes 130 are respectively communicated with the denitrification tanks 311 in the two series of biochemical units 310. Two nitrification liquid return pipes 140 are communicated with the two nitrification tanks 312 in one-to-one correspondence.

The distribution tank 110 of the flow distribution well 100 includes a water reservoir 112 and two water outlet weirs 111 disposed on both sides of the water reservoir 112, and two biochemical water pipes 130 are correspondingly connected to the two water outlet weirs 111. The three anaerobic water pipes 120 and the two nitrifying liquid return pipes 140 are communicated with the reservoir 112, mixed sewage of anaerobic effluent and reflux nitrifying liquid in the reservoir 112 is discharged into the corresponding effluent weir 111 in advance, and then the mixed sewage is distributed into the corresponding denitrification tank 311 by the effluent weir 111, so that the stability of the effluent of the distribution tank 110 is improved.

It should be noted that, the water flow rate, the water ratio, and the like of the distribution tank 110 may be automatically adjusted by an automatic valve.

As shown in fig. 3, the top of the distribution tank 110 is connected to an exhaust pipe 160 for exhausting harmful gases, and has good deodorizing and ventilating functions. The outlet of the exhaust duct 160 communicates with an odor system 400, and the odor system 400 is used to treat the harmful gases discharged through the exhaust duct 160. The bottom of the distribution tank 110 communicates with a sludge discharge pipe 170 for discharging sludge.

The landfill leachate treatment system further comprises a sump 500, and the flow distribution well 100 further comprises a sewer pipe 150, the sewer pipe 150 being adapted to communicate an outlet of the sump 500 with the distribution tank 110. More specifically, the sewage pipe 150 is communicated with the reservoir 112 of the distribution tank 110, and the domestic sewage in the sewage tank 500 enters the reservoir 112 through the sewage pipe 150 to be mixed with anaerobic effluent and reflux nitrified liquid, and then is uniformly distributed into the subsequent biochemical units 310 through the effluent weir 111 for biochemical treatment.

In the garbage leachate treatment system provided in this embodiment, the effluent in the three anaerobic tanks 210 is reasonably distributed to the two subsequent biochemical units 310 by adopting the flow distribution well 100, so that the effect of flow distribution is realized, and meanwhile, the adjustable water quantity and flow can be ensured. In normal operation of the landfill leachate treatment system, anaerobic effluent from the three anaerobic tanks 210 may be equally distributed to the subsequent two denitrification tanks 311 through the flow distribution well 100. When the biochemical units are operated in a single series, anaerobic effluent can enter the same denitrification tank 311 completely, and the other denitrification tank 311 stops, and simultaneously, the single series combination of the biochemical units 310 is improved to meet the production condition requirement. And the switching between production lines is facilitated.

In addition, in the garbage leachate treatment system provided in this embodiment, the flow distribution well 100 is adopted to receive the domestic sewage, flushing water and other waste water, so that the waste water can be directly distributed into the biochemical module 300, the water inlet combination of the anaerobic module 200 is not occupied, the treatment capacity of leachate is further improved, and the water treatment cost is reduced. In addition, the nitrifying liquid in the garbage leachate treatment system provided by the embodiment can flow back into the flow distribution well 100, uniform redistribution is performed through the flow distribution well 100, intercommunication and circulation of nitrifying liquid among the biochemical units 310 are realized, and then the nitrifying liquid level of the biochemical units 310 can be conveniently and rapidly adjusted.

In the description of the present utility model, 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 utility model 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 utility model.

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 utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, 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 utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

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

Claims (10)

1. A flow distribution well for landfill leachate treatment, the flow distribution well being disposed between an anaerobic module and a biochemical module of a landfill leachate treatment system for distributing effluent of the anaerobic module into the biochemical module, the flow distribution well comprising: a distribution tank, an anaerobic water pipe, a biochemical water pipe and a nitrifying liquid return pipe,

the anaerobic water pipe is used for communicating the anaerobic module water outlet with the distribution tank, the biochemical water pipe is used for communicating the distribution tank with the biochemical module water inlet, the nitrifying liquid return pipe is used for communicating the nitrifying liquid outlet of the biochemical module with the distribution tank, and the flow distribution well is also used for redistributing the nitrifying liquid which flows back.

2. The flow distribution well for landfill leachate treatment according to claim 1, further comprising a sewer pipe for communicating a sewer outlet with the distribution tank, the flow distribution well further being for distributing sewage of the sewer tank into the biochemical module through the biochemical water pipe.

3. The flow distribution well for landfill leachate treatment according to claim 1, wherein the anaerobic water pipes are plural, and the plural anaerobic water pipes are respectively communicated with plural anaerobic tanks of the anaerobic module in one-to-one correspondence; and/or the number of the groups of groups,

the biochemical water pipes are respectively communicated with the biochemical units of the biochemical module in a one-to-one correspondence manner.

4. The flow distribution well for landfill leachate treatment according to claim 1, further comprising a vent conduit communicating with the top of the distribution tank for venting.

5. The flow distribution well for landfill leachate treatment according to claim 1, further comprising a sludge discharge pipe communicating with a bottom of the distribution tank for discharging sludge.

6. The flow distribution well for landfill leachate treatment according to claim 1, wherein the distribution well comprises a water outlet weir and a water reservoir, the water outlet weir and the water reservoir are adjacently arranged with a common pool wall therebetween, sewage in the water reservoir flows into the water outlet weir, the anaerobic water pipe and the nitrifying liquid return pipe are both communicated with the water reservoir, and the biochemical water pipe is communicated with the water outlet weir.

7. A landfill leachate treatment system, comprising

An anaerobic module;

a biochemical module; and

a flow distribution well according to any one of claims 1-5, connected between and downstream of the anaerobic module and the biochemical module.

8. A landfill leachate treatment system according to claim 7, wherein,

the anaerobic module comprises a plurality of anaerobic tanks, the flow distribution well comprises a plurality of anaerobic water pipes, and the anaerobic water pipes are respectively communicated with the anaerobic tanks in a one-to-one correspondence manner;

the biochemical module comprises a plurality of biochemical units which are connected in parallel, the biochemical units comprise denitrification tanks and nitrification tanks which are connected in series, the flow distribution well comprises a plurality of biochemical water pipes, and the biochemical water pipes are respectively communicated with the denitrification tanks in a one-to-one correspondence manner.

9. The landfill leachate treatment system according to claim 8, wherein the number of the anaerobic tanks is different from the number of the biochemical units.

10. The landfill leachate treatment system according to claim 7, further comprising a sump, wherein the flow distribution well further comprises a sewer pipe for communicating an outlet of the sump with the distribution tank.