Wastewater purifier

Abstract

The application discloses a wastewater purifier, which comprises a reaction tower and a three-phase separator. The reaction tower has a water storage cavity for storing wastewater to provide a suitable reaction environment for microorganisms. The reaction tower is connected with a water distribution pipe after purification. The three-phase separator comprises a separation cavity, a water distribution reflection plate, a sludge bucket and a water-gas separation structure. The water distribution reflection plate and the water-gas separation structure are arranged in the separation cavity. The water distribution reflection plate is located below the sludge bucket. The water-gas separation structure comprises a first drainage plate, a second drainage plate and a wastewater discharge cavity. The bottom end of the first drainage plate is located directly above the second drainage plate and is arranged in a spaced manner with the second drainage plate to form a staggered water inlet communicated with the wastewater discharge cavity. The water-gas separation structure further comprises a water outlet structure communicated with the wastewater discharge cavity and used for draining wastewater from the wastewater discharge cavity to the external environment for discharge.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of purifiers, in particular to a wastewater purifier. BACKGROUND

[0002] Since the first "automatic purifier" was developed in France in 1860, anaerobic technology has begun to be valued by treatment workers. After the 20th century, people began to realize that anaerobic technology needs to be separated from sludge. In 1969, Young and McCarty invented the first anaerobic filter.

[0003] With the continuous improvement of water treatment research and development, the tower type anaerobic reactor (hereinafter referred to as the tower type anaerobic reactor) has begun to enter the mainstream water treatment process. At present, the tower type anaerobic reactor is a device as a mainstream anaerobic treatment process on the market. According to the different internal structures, it can be divided into upflow anaerobic sludge bed reactor (UASB), anaerobic granular sludge expanded bed reactor (EGSB), anaerobic internal circulation reactor (IC) and the like. However, due to the production of biogas in the anaerobic reaction process, and the reaction environment is the surface of the granular sludge (the granular sludge is formed by the microorganisms after degrading the organic matter in the wastewater, which is called organic sludge in the industry compared with inorganic sludge). All kinds of reactors inevitably have the same phenomenon: that is, due to the gas floating effect of biogas, the phenomenon of loss of granular sludge. In order to solve the problem of sludge loss, at present, all kinds of reactors generally use "three-phase separator" structure for optimization, that is, the multilayer baffle at the upper end of the tower type anaerobic reactor separates the wastewater carrying granular sludge and biogas by the three-phase separator (that is, separates the wastewater, sludge and biogas), the separated wastewater flows out to the outside of the tower, the granular sludge re-sediments to the bottom of the reactor, and the biogas is discharged through the collection pipeline.

[0004] However, the tower type anaerobic reactor on the market at present all sets the three-phase separator to avoid sludge loss, but the structure has the following technical defects:

[0005] 1. The construction difficulty of installing the three-phase separator in the upper part of the tower is large, and the construction hidden danger is heavy.

[0006] 2. The three-phase separator is mainly composed of stainless steel plate and PP plate, which increases the bearing load of the tower type anaerobic reactor.

[0007] 3. If the wastewater hardness is high, the three-phase separator will appear scaling phenomenon after long time operation, gradually block the biogas collection pipeline, continue to cause the problem of excessive local pressure, and further easily cause damage to the three-phase separator. SUMMARY

[0008] The wastewater purifier provided by the embodiments of the present application solves the problems in the related art, and the technical scheme is as follows:

[0009] The embodiment of the present application provides a wastewater purifier, which comprises:

[0010] A reaction tower is provided with a water storage cavity; the water storage cavity is used for storing wastewater to provide a suitable reaction environment for microorganisms; the reaction tower is connected with a post-purification water distribution pipe;

[0011] A three-phase separator comprises a separation cavity, a water distribution reflection plate, a mud bucket and a water-gas separation structure; the water distribution reflection plate and the water-gas separation structure are arranged in the separation cavity; the injection port of the post-purification water distribution pipe is directed to the water distribution reflection plate; the mud bucket is located below the water distribution reflection plate; the water-gas separation structure comprises a first drainage plate, a second drainage plate and a wastewater discharge cavity; the bottom end of the first drainage plate is located directly above the second drainage plate and is arranged in a spaced manner with the second drainage plate to form a staggered water inlet which is in communication with the wastewater discharge cavity, and the separation cavity is in communication with the wastewater discharge cavity through the staggered water inlet; the water-gas separation structure further comprises a water outlet structure which is in communication with the wastewater discharge cavity and is used for draining wastewater from the wastewater discharge cavity to the external environment for discharge.

[0012] Further, the wastewater purifier further comprises a pulse water distributor which is connected to the top of the reaction tower, and a water outlet pipe of the pulse water distributor is connected to the water storage cavity; the water outlet pipe is connected with a shunt structure which is formed by a plurality of water outlet pipes connected in parallel.

[0013] Further, the reaction tower is connected with an overflow water outlet pipe which has an overflow inlet and an overflow outlet, the overflow inlet is located above the overflow outlet; the overflow outlet is connected with the post-purification water distribution pipe.

[0014] Further, the water distribution reflection plate has a conical structure or a truncated cone structure, and the cross-sectional area of the water distribution reflection plate gradually increases along the direction of gravity.

[0015] Further, the overflow outlet of the overflow water outlet pipe is connected with a mud bucket flushing pipe which is connected to the side wall of the mud bucket; the mud bucket flushing pipe is connected with a first valve.

[0016] Further, the side wall of the mud bucket is connected with a plurality of mud bucket mud discharge pipes which are arranged in a spaced manner along the direction of gravity; the mud bucket mud discharge pipes are connected with a second valve.

[0017] Further, the bottom of the reaction tower is connected with a hydraulic mud discharge pipe, the other end of the hydraulic mud discharge pipe is connected to the side wall of the mud bucket; the hydraulic mud discharge pipe is connected with a third valve.

[0018] Further, the bottom of the reaction tower is provided with a cleaning port, and the cleaning port is connected with a fourth valve 94.

[0019] Further, a plurality of biogas exhaust pipes are connected to the three-phase separator, part of the biogas exhaust pipes being in communication with the separation cavity, and part of the biogas exhaust pipes being in communication with the wastewater discharge cavity.

[0020] Further, the water-gas separation structure is connected with a slant pipe filler, which is located below the water outlet structure; the water outlet structure includes a plurality of water outlet grooves.

[0021] The above technical solution has at least the following advantages or beneficial effects:

[0022] 1. By arranging the three-phase separator outside the water storage cavity, the installation difficulty, high-altitude construction danger and other problems in the prior art are solved; and the three-phase separator does not need to be supported by the reaction tower, thereby reducing the strength requirement of the reaction tower; and when the three-phase separator is scaled, it can be cleaned independently without the need for workers to work on the top of the water storage cavity (i.e. high-altitude work).

[0023] 2. In addition, the water distribution reflection plate of the three-phase separator is directed towards the spray port of the water distribution pipe after purification, so that the granular sludge and inorganic sludge in the purified wastewater can be separated, so that the inorganic sludge is settled at the bottom of the hopper, and the granular sludge is settled above the inorganic sludge, so that the inorganic sludge can be independently removed later while retaining the granular sludge, and the granular sludge can also be pumped back to the water storage cavity to increase the concentration of the granular sludge in the water storage cavity. It should be noted that the growth cycle of the granular sludge is relatively long, so it is not suitable to be completely discharged together with the inorganic sludge.

[0024] 3. Further, the bottom end of the first drainage plate of the water-gas separation structure is located directly above the second drainage plate and is spaced apart from the second drainage plate to form a staggered water inlet in communication with the wastewater discharge cavity; when the biogas and wastewater rise at the same time, the biogas is affected by the buoyancy, so its flow rate is fast and its direction is vertically upward, so it is difficult to enter the separation cavity along the staggered water inlet, thereby separating from the wastewater. In this way, the content of biogas, granular sludge and inorganic sludge in the discharged wastewater is extremely small, thereby meeting the discharge requirements.

[0025] 4. In particular, the water between the lower layer of particles (inorganic sludge) in the hopper is squeezed out under the gravity of the upper layer of particles (organic sludge), thereby reducing the water content between the inorganic sludge particles.

[0026] 5. More particularly, the granular sludge produces biogas, causing part of the granular sludge to be suspended between the water distribution reflection plate and the water-gas separation structure; when the organic matter is discharged upward along the wastewater to the staggered water inlet, the organic matter is intercepted by the granular sludge integrated into a mass and supporting each other, thereby further purifying the wastewater, so that the wastewater entering the staggered water inlet is cleaner.

[0027] The above summary is intended to illustrate only and is not intended to be limiting in any way. Further aspects, embodiments and features of the present application will be readily apparent to those skilled in the art, by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0028] In the drawings, like numerals refer to like elements throughout the various drawings. The drawings are not necessarily to scale, the emphasis instead being placed on illustrating the principles of the application. It should be understood that the drawings are merely depictions of some embodiments of the application and should not be construed as limiting the scope of the application.

[0029] Figure 1 Figure 1 is a schematic view of a wastewater purifier according to an embodiment of the present application. The arrow indicates the direction of wastewater flow.

[0030] 1, reaction tower; 11, water storage cavity; 12, water distribution pipe after purification; 13, cleaning port; 2, three-phase separator; 21, separation cavity; 22, water distribution reflection plate; 23, mud bucket; 24, water-gas separation structure; 241, first drainage plate; 242, second drainage plate; 243, wastewater discharge cavity; 244, staggered water inlet; 245, water outlet structure; 246, inclined pipe filler; 3, pulse water distributor; 31, water outlet pipe; 32, shunt structure; 4, overflow water outlet pipe; 41, overflow inlet; 42, overflow outlet; 5, mud bucket flushing pipe; 6, mud bucket mud discharge pipe; 7, hydraulic mud discharge pipe; 8, biogas exhaust pipe; 91, first valve; 92, second valve; 93, third valve; 94, fourth valve. DETAILED DESCRIPTION

[0031] In the following, only some exemplary embodiments are described in brief. As those skilled in the art will recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. The drawings and the description are therefore to be considered as illustrative in nature rather than restrictive.

[0032] Reference Figure 1 The wastewater purifier according to the present embodiment comprises a reaction tower 1, a three-phase separator 2, and a pulse water distributor 3.

[0033] The reaction tower 1 has a water storage cavity 11 (i.e. a reaction cavity) for storing wastewater to provide a suitable reaction environment for microorganisms. The reaction tower 1 is connected with a purified water distribution pipe 12 for discharging the purified wastewater into the three-phase separator 2 to separate the wastewater, sludge and biogas by the three-phase separator 2. Specifically, after the microorganisms in the water storage cavity 11 degrade the organic matter in the wastewater, the microorganisms grow into groups to form granular sludge (commonly known as organic sludge), and the granular sludge floats in the water storage cavity 11 along with the biogas produced by the microorganisms. After the biogas is discharged, the granular sludge will sink downward. Since the inorganic sludge is mixed in the organic matter, the inorganic sludge will sink to the bottom of the water storage cavity 11.

[0034] The three-phase separator 2 includes a separation cavity 21, a water distribution reflection plate 22, a sludge hopper 23 and a water-gas separation structure 24. The water distribution reflection plate 22 and the water-gas separation structure 24 are arranged in the separation cavity 21. The injection port of the purified water distribution pipe 12 is directed towards the water distribution reflection plate 22, so that when the wastewater mixed with inorganic sludge is sprayed towards the water distribution reflection plate 22, it will produce splashing, thereby separating the granular sludge and the organic sludge. The sludge hopper 23 is located below the water distribution reflection plate 22 to collect the organic sludge and the inorganic sludge after sinking. Since the inorganic sludge has a large density (i.e. small particles) and the granular sludge has a small density (i.e. large particles), generally speaking, after sinking, the organic sludge is located at the bottom of the sludge hopper 23, and the granular sludge is located at the surface layer of the sludge hopper 23. The water-gas separation structure 24 includes a first drainage plate 241, a second drainage plate 242 and a wastewater discharge cavity 243. Further, the bottom end of the first drainage plate 241 is located directly above the second drainage plate 242 and is arranged spaced apart from the second drainage plate 242 to form a staggered water inlet 244 in communication with the wastewater discharge cavity 243. When the biogas and the wastewater rise at the same time, since the biogas is affected by the buoyancy, its flow rate is fast and its direction is vertically upward, so it is difficult to enter the separation cavity 21 along the staggered water inlet 244, thereby separating from the wastewater. The water-gas separation structure 24 further includes a water outlet structure 245 in communication with the wastewater discharge cavity 243 and used for draining the wastewater from the wastewater discharge cavity 243 to the external environment for discharge.

[0035] When working, under the action of the pulse water distributor 3 (of course, it can also be replaced by a solenoid valve), the quantitative wastewater is injected into the water storage cavity 11, and then the granular sludge degrades the newly-injected wastewater. Based on the injection of the new wastewater, the overflowing wastewater overflows or is pumped by the water pump to the three-phase separator 2, and then the three-phase separator 2 completes the separation of the wastewater, sludge and biogas. Specifically, when the wastewater is sprayed to the water distribution reflection plate 22, the splashing phenomenon is generated, thereby dispersing the granular sludge and organic sludge carried in the already-purified wastewater. Based on the large density of inorganic sludge and the influence of the gas floatation principle (in simple terms, the gas floatation principle is that the granular sludge rises after generating biogas, and then sinks under the action of gravity after the biogas is discharged), the inorganic sludge can quickly settle at the bottom of the hopper 23; and the granular sludge has small density and settles above the organic sludge based on the gas floatation principle. Then, the wastewater carrying the biogas is upwardly discharged to the staggered water inlet 244, and the biogas bypasses the staggered water inlet 244 and is vertically upwardly discharged due to the shielding effect of the second guide plate 242, while the wastewater enters the wastewater discharge cavity 243 along the staggered water inlet 244, and is finally discharged to the outside environment through the water outlet structure 245.

[0036] Obviously, by arranging the three-phase separator 2 outside the water storage cavity 11, the installation difficulty, high-altitude construction danger and other problems in the prior art are solved; and the three-phase separator 2 does not need to be supported by the reaction tower 1, thereby reducing the strength requirement of the reaction tower 1; and when the three-phase separator 2 is scaled, it can be cleaned independently without the need for workers to work on the top of the water storage cavity 11 (i.e. high-altitude work). In addition, based on the fact that the water distribution reflection plate 22 of the three-phase separator 2 is directed towards the spray port of the post-purification water distribution pipe 12, the granular sludge and inorganic sludge in the purified wastewater can be separated, so that the inorganic sludge is settled at the bottom of the hopper 23, and the granular sludge is settled above the inorganic sludge, so that the inorganic sludge can be independently removed later while retaining the granular sludge, and the granular sludge can also be pumped back to the water storage cavity 11 to increase the concentration of the granular sludge in the water storage cavity 11. It should be noted that the growth cycle of the granular sludge is relatively long, so it is not appropriate to be completely discharged together with the inorganic sludge. Further, by limiting the bottom end of the first drainage plate 241 of the water-gas separation structure 24 to be located directly above the second drainage plate 242 and spaced apart from the second drainage plate 242 to form a misaligned water inlet 244 communicating with the wastewater discharge cavity 243, when the biogas and wastewater rise at the same time, based on the fact that the biogas is affected by the buoyancy, its flow rate is fast and the direction is vertically upward, so it is difficult to enter the separation cavity 21 along the misaligned water inlet 244, thereby separating from the wastewater. In this way, the content of biogas, granular sludge and inorganic sludge in the discharged wastewater is extremely small, thereby meeting the discharge requirements. In particular, the water between the lower layer of particles (inorganic sludge) on the hopper 23 is squeezed out under the gravity of the upper layer of particles (organic sludge), thereby reducing the water content between the inorganic sludge particles. More particularly, based on the fact that the granular sludge produces biogas, part of the granular sludge is suspended between the water distribution reflection plate 22 and the water-gas separation structure 24, when the organic matter is discharged upwards along the wastewater to the misaligned water inlet 244, the organic matter is intercepted by the granular sludge integrated into a mass and supporting each other, thereby further purifying the wastewater, so that the wastewater entering the misaligned water inlet 244 is cleaner.

[0037] In the present embodiment, preferably, the pulse water distributor 3 is connected to the top of the reaction tower 1, and the water outlet pipe 31 of the pulse water distributor 3 is connected to the water storage cavity 11, so that the wastewater of the pulse water distributor 3 can enter the water storage cavity 11 by gravity. In order to facilitate balanced water outlet, the water outlet pipe 31 is connected with a shunt structure 32, and the shunt structure 32 is formed by a plurality of water outlet pipes 31 connected in parallel.

[0038] In the embodiment, preferably, the reaction tower 1 is connected with an overflow water outlet pipe 4, the overflow water outlet pipe 4 is provided with an overflow inlet 41 and an overflow outlet 42, the overflow inlet 41 is located above the overflow outlet 42, and the overflow outlet 42 is connected with the purified water distribution pipe 12. In this way, the water in the pulse water distributor 3 enters the water storage cavity 11 by gravity, and the water (i.e. the purified wastewater at the top) in the water storage cavity 11 is forced to overflow into the separation cavity 21 of the three-phase separator 2.

[0039] In the embodiment, preferably, the water distribution reflection plate 22 is in a pyramid structure or a frustum structure, and the cross-sectional area of the water distribution reflection plate 22 gradually increases along the gravity direction. In this way, the water distribution reflection plate 22 uniformly guides the water sprayed by the purified water distribution pipe 12 to the surroundings of the water distribution reflection plate 22, so as to sufficiently disperse the granular sludge and inorganic sludge. More preferably, the water distribution reflection plate 22 is in a cone structure or a conical frustum structure, so as to more uniformly guide the water sprayed by the purified water distribution pipe 12 to the surroundings of the water distribution reflection plate 22. That is to say, as an alternative, the water distribution reflection plate 22 can be in a common pyramid or a common frustum structure, etc.

[0040] It should be noted that, for high-hardness and high-suspension wastewater, since the wastewater contains a large amount of calcium ions and magnesium ions, and the colloids and other substances in the wastewater are easy to combine with inorganic substances, after the wastewater is reacted in the tower-type anaerobic reactor, the calcium ions and magnesium ions will scale in the tower-type anaerobic reactor (or in the sludge hopper 23), which on the one hand reduces the concentration of the granular sludge, thereby affecting the activity of the granular sludge, and on the other hand causes the phenomenon of pipe blockage and is not easy to discharge, and has high cleaning difficulty and large cost. Therefore, in order to solve this hidden danger, in the embodiment, preferably, the overflow outlet 42 of the overflow water outlet pipe 4 is connected with a sludge hopper flushing pipe 5, the sludge hopper flushing pipe 5 is connected to the side wall of the sludge hopper 23, and the sludge hopper flushing pipe 5 is connected with a first valve 91. In this way, when the sludge hopper 23 needs to be flushed, the first valve 91 is opened, and when the next pulse of the pulse water distributor 3 arrives, the overflow water outlet pipe 4 flushes the wastewater from the sludge hopper flushing pipe 5, so that the sludge is dispersed, and the scaled sludge is settled in the sludge hopper 23 again after being dispersed.

[0041] In the embodiment, in order to facilitate the discharge of the inorganic sludge, preferably, the side wall of the sludge hopper 23 is connected with a plurality of sludge hopper sludge discharge pipes 6, the plurality of sludge hopper sludge discharge pipes 6 are arranged at intervals along the gravity direction, and the sludge hopper sludge discharge pipes 6 are connected with a second valve 92. In this way, according to the different heights of the inorganic sludge and the organic sludge, one or more second valves 92 are selectively opened, so as to accurately discharge the inorganic sludge. That is to say, the inorganic sludge can be discharged by opening the second valve 92.

[0042] Based on the small flow of overflow water pipe 4, the flow is pulse water discharge of pulse water distributor 3 each time, so that its flushing ability is limited. Therefore, in the embodiment, preferably, the bottom of reaction tower 1 is connected with hydraulic sludge discharge pipe 7, the other end of which is connected to the side wall of hopper 23; the hydraulic sludge discharge pipe 7 is connected with third valve 93. In this way, when the scaling of hopper 23 is hard and difficult to flush, strong flushing can be carried out through hydraulic sludge discharge pipe 7, so as to achieve the purpose of cleaning the dirt.

[0043] In the embodiment, preferably, the bottom of reaction tower 1 is provided with cleaning port 13, which is connected with fourth valve 94. In this way, when the reaction tower 1 needs to be overhauled, opening the cleaning port 13 can not only clean the inorganic sludge better, but also quickly drain the wastewater in the reaction tower 1.

[0044] In the embodiment, in order to avoid excessive internal gas pressure, that is, in order to facilitate the discharge and recycling of biogas, preferably, a plurality of biogas exhaust pipes 8 are connected with three-phase separator 2, part of the biogas exhaust pipes 8 are communicated with separation cavity 21, and part of the biogas exhaust pipes 8 are communicated with wastewater discharge cavity 243.

[0045] In the embodiment, preferably, water-gas separation structure 24 is connected with inclined pipe filler 246, which is located below water outlet structure 245; wherein the inclined pipe filler 246 is an existing product, which is used for separating sludge (granular sludge and wastewater).

[0046] In the embodiment, in order to ensure that water outlet structure 245 has sufficient flow, water outlet structure 245 includes a plurality of water outlet grooves, of course, it can also be a plurality of pipes and the like.

[0047] The valve of the embodiment can be solenoid valve, ball valve and the like.

[0048] In addition, it should be noted that when the three-phase separator 2 needs to be cleaned manually, the first valve 91 and the third valve 93 can be closed, the second valve 92 can be opened, and the three-phase separator 2 can be emptied alone, without the need to empty the water storage cavity 11, so that the concentration of granular sludge in the water storage cavity 11 can be maintained normal without long time recovery.

[0049] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Also, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0050] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0051] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A waste water purifier characterised in that, The utility model relates to a wastewater purifier, including: a reaction tower (1) with a water storage cavity (11), the water storage cavity (11) is used to store wastewater to provide suitable reaction environment for microorganism, the reaction tower (1) is connected with the water distribution pipe (12) after purification; a three-phase separator (2) including a separation cavity (21), a water distribution reflection plate (22), a mud bucket (23) and a water-gas separation structure (24), the water distribution reflection plate (22) and the water-gas separation structure (24) are arranged in the separation cavity (21), the injection port of the water distribution pipe (12) after purification is towards the water distribution reflection plate (22), the mud bucket (23) is located below the water distribution reflection plate (22), the water-gas separation structure (24) includes a first drainage plate (241), a second drainage plate (242) and a wastewater discharge cavity (243), the bottom end of the first drainage plate (241) is located directly above the second drainage plate (242) and is arranged spaced apart from the second drainage plate (242) to form a staggered water inlet (244), the separation cavity (21) is communicated with the wastewater discharge cavity (243) through the staggered water inlet (244), the water-gas separation structure (24) further includes a water outlet structure (245), the water outlet structure (245) is communicated with the wastewater discharge cavity (243) and is used to drain wastewater from the wastewater discharge cavity (243) to the external environment for discharge; the sidewall of the mud bucket (23) is connected with a plurality of mud bucket mud discharge pipes (6), and the plurality of mud bucket mud discharge pipes (6) are arranged spaced apart along the direction of gravity, and the mud bucket mud discharge pipe (6) is connected with a second valve (92).

2. The waste water purifier according to claim 1, characterized in that, The wastewater purifier further includes a pulse water distributor (3), the pulse water distributor (3) is connected to the top of the reaction tower (1), the water outlet pipe (31) of the pulse water distributor (3) is connected to the water storage cavity (11), the water outlet pipe (31) is connected with a shunt structure (32), and the shunt structure (32) is formed by the parallel connection of a plurality of water outlet pipes (31).

3. The waste water purifier as claimed in claim 1, wherein, The reaction tower (1) is connected with an overflow water outlet pipe (4), the overflow water outlet pipe (4) has an overflow inlet (41) and an overflow outlet (42), the overflow inlet (41) is located above the overflow outlet (42), and the overflow outlet (42) is connected with the water distribution pipe (12) after purification.

4. The waste water purifier as claimed in claim 1, wherein, The water distribution reflection plate (22) is in the shape of a cone or a truncated cone, and the cross-sectional area of the water distribution reflection plate (22) gradually increases along the direction of gravity.

5. The waste water purifier as claimed in claim 3, wherein, The overflow outlet (42) of the overflow water outlet pipe (4) is connected with a mud bucket flushing pipe (5), the mud bucket flushing pipe (5) is connected to the sidewall of the mud bucket (23), and the mud bucket flushing pipe (5) is connected with a first valve (91).

6. The waste water purifier as claimed in claim 5, wherein, The bottom of the reaction tower (1) is connected with a hydraulic mud discharge pipe (7), the other end of the hydraulic mud discharge pipe (7) is connected to the sidewall of the mud bucket (23), and the hydraulic mud discharge pipe (7) is connected with a third valve (93).

7. The waste water purifier as claimed in claim 1, wherein The bottom of the reaction tower (1) is provided with a cleaning port (13), and the cleaning port (13) is connected with a fourth valve (94).

8. The waste water purifier as claimed in claim 1, wherein, A plurality of biogas exhaust pipes (8) are connected to the three-phase separator (2), part of the biogas exhaust pipes (8) are communicated with the separation cavity (21), and part of the biogas exhaust pipes (8) are communicated with the wastewater discharge cavity (243).

9. The waste water purifier as claimed in claim 1, wherein, The water-gas separation structure (24) is connected with an inclined pipe filler (246), and the inclined pipe filler (246) is located below the water outlet structure (245); and the water outlet structure (245) comprises a plurality of water outlet grooves.

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