CN216890152U - Sewage treatment system - Google Patents

Abstract

The utility model discloses a sewage treatment system which comprises a shell, a mixing box, a water distribution device and a three-phase separator, wherein the shell defines a cavity; the mixing box is arranged on the shell and is provided with a first sewage inlet, a first medicament inlet, a second medicament inlet and a second sewage outlet; the water distribution device is arranged on the shell and is positioned below the mixing box, the water distribution device is provided with a second sewage inlet and a third sewage outlet, the second sewage inlet is communicated with the second sewage outlet, and the third sewage outlet is communicated with the cavity; the three-phase separator is arranged in the cavity and positioned above the water distribution device, the three-phase separator is provided with an inlet and outlet channel, a liquid discharge port and a sludge discharge channel, and the inlet and outlet channel is communicated with the cavity. The sewage treatment system provided by the embodiment of the utility model has the advantages of small floor area and low operation cost.

Description

Sewage treatment system

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment system.

Background

Advanced Oxidation Process (AOP) is also called deep Oxidation Process, and is characterized by producing hydroxyl radical (OH) with strong Oxidation ability, and under the reaction conditions of high temperature and high pressure, electricity, sound, light irradiation and catalyst, the macromolecular refractory organic matter is oxidized into low-toxic or non-toxic micromolecular substance. Depending on the manner of generating radicals and the reaction conditions, they can be classified into photochemical oxidation, catalytic wet oxidation, sonochemical oxidation, ozone oxidation, electrochemical oxidation, Fenton oxidation, and the like.

The advanced oxidation technology has the advantages of short reaction time, high reaction speed, controllable process, no selectivity, capability of degrading various organic pollutants and the like. With the stricter wastewater discharge requirements and the continuous expansion of reclaimed water reuse requirements, the application of advanced oxidation technology, especially Fenton advanced oxidation technology, in the wastewater treatment fields of paper making, fermentation, chemical industry, pharmacy and the like becomes wider and wider. However, the sewage treatment system in the related art has a problem of high operation cost.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the embodiment of the utility model provides a sewage treatment system to reduce the operation cost of the sewage treatment system and reduce the floor area of the sewage treatment system.

The sewage treatment system comprises a shell, a mixing box, a water distribution device and a three-phase separator, wherein the shell defines a cavity; the mixing box is arranged on the shell and is provided with a mixing cavity, and a first sewage inlet, a first medicament inlet, a second medicament inlet and a second sewage outlet which are communicated with the mixing cavity; the water distribution device is arranged on the shell and is positioned below the mixing box, the water distribution device is provided with a second sewage inlet and a third sewage outlet which are communicated, the second sewage inlet is communicated with the second sewage outlet, and the third sewage outlet is communicated with the cavity; the three-phase separator is arranged in the cavity and positioned above the water distribution device, the three-phase separator is provided with an inlet and outlet channel, a sludge discharge channel and a liquid discharge port, and the inlet and outlet channel is communicated with the cavity.

The sewage treatment system provided by the embodiment of the utility model has the advantages of low operation cost, small occupied area and the like.

In some embodiments, the wastewater treatment system further comprises a water pump having a water pump inlet and a water pump outlet, the water pump inlet in communication with the second wastewater outlet, the second wastewater inlet in communication with the water pump outlet.

In some embodiments, the mixing box is disposed within the chamber, the housing has a housing inlet in communication with the first contaminated water inlet, a first drug inlet in communication with the first drug inlet, and a second drug inlet in communication with the second drug inlet, the mixing box has a fourth contaminated water inlet in communication with the mixing chamber, the fourth contaminated water inlet in communication with the chamber.

In some embodiments, the mixing box is offset to one side of the housing, and a portion of the three-phase separator is at the same height as a portion of the mixing box.

In some embodiments, the mud channel communicates with the chamber.

In some embodiments, the water pump is disposed outside the housing.

In some embodiments, the water distribution device is located entirely below the shell.

In some embodiments, the water distribution device is a swirling flow water distribution device, the swirling flow water distribution device comprises a shell and a plurality of nozzles, and the shell is arranged on the shell; the plurality of nozzles are arranged in the shell, one part of the plurality of nozzles is a swirl nozzle, and the other part of the plurality of nozzles is a jet nozzle.

In some embodiments, the housing comprises a tapered section having an inner diameter gradually decreasing from top to bottom, and a sludge outlet at the bottom of the tapered section.

In some embodiments, the sewage treatment system further comprises a sludge hopper having a sludge inlet and a sludge discharge, the sludge inlet being in communication with the sludge outlet.

In some embodiments, the housing is generally cylindrical and has an aspect ratio of 3 to 6.

In some embodiments, the housing has an opening in communication with the chamber, the opening being located at an upper end of the housing, the sewage treatment system further comprising a cover plate mounted over the opening, the cover plate and the housing having a gap therebetween.

Drawings

FIG. 1 is a front view of a sewage treatment system according to an embodiment of the present invention.

Fig. 2 is a view from a-a of fig. 1.

FIG. 3 is a top view of a wastewater treatment system according to one embodiment of the utility model.

Reference numerals:

a sewage treatment system 100;

a housing 1; a chamber 101; a housing inlet 102; a housing outlet 103;

a mixing box 2; a mixing chamber 201;

a water distribution device 3; a second sewage inlet 301; a third effluent outlet 302; a housing 303; a reducer section 3031; a sludge outlet 304;

a three-phase separator 4; a liquid discharge port 401;

a sludge hopper 5; a sludge inlet 501; a sludge discharge port 502;

a return line 6; a return branch conduit 601;

a liquid inlet pipe 7;

a sludge discharge pipe 8;

a drain pipe 9;

a cover plate 10.

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 with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

As shown in fig. 1 to 3, a sewage treatment system 100 according to an embodiment of the present invention includes a housing 1, a mixing tank 2, a water distribution device 3, and a three-phase separator 4. The shell 1 defines a chamber 101, the mixing box 2 is arranged on the shell 1, the water distribution device 3 is arranged on the shell 1, the three-phase separator 4 is arranged in the chamber 101, and the three-phase separator 4 is positioned above the water distribution device 3. Mixing box 2 has the compounding chamber 201 and with the first sewage import of compounding chamber 201 intercommunication, first medicament import, second medicament import and second sewage export. The water distribution device 3 is provided with a second sewage inlet 301 and a third sewage outlet 302 which are communicated, wherein the second sewage inlet 301 is communicated with the second sewage outlet, and the third sewage outlet 302 is communicated with the chamber 101. The three-phase separator 4 has an inlet and outlet passage communicating with the chamber 101 and a sludge discharge passage and a liquid discharge port 401.

When the sewage treatment system 100 of the embodiment of the utility model works, firstly, sewage to be treated (first sewage) is added into the mixing cavity 201 of the mixing box 2 by using the first sewage inlet, a first medicament (for example, ferrous sulfate) is added into the mixing cavity 201 of the mixing box 2 by using the first medicament inlet, and a second medicament (for example, hydrogen peroxide) is added into the mixing cavity 201 of the mixing box 2 by using the second medicament inlet, so that the sewage to be treated, the first medicament and the second medicament in the mixing cavity 201 are mixed and reacted in the mixing box 2 to form second sewage. Then, the second sewage flows out through the second sewage outlet and enters the chamber 101 through the second sewage inlet 301 and the third sewage outlet 302 of the water distribution device 3, and the second sewage is uniformly distributed in the chamber 101 by the water distribution device 3 to form third sewage. Then, at least a part of the third sewage enters the three-phase separator 4 through the inlet and outlet channel, the third sewage is separated into gas (mainly in a gas phase), treated sewage (mainly in a liquid phase) and first sludge (mainly in a solid phase) by the three-phase separator 4, the gas is discharged out of the three-phase separator 4 through the inlet and outlet channel, the treated sewage is discharged out of the three-phase separator 4 through the liquid discharge port 401, and the first sludge is discharged out of the three-phase separator 4 through the sludge discharge channel.

In the above sewage treatment process, sewage firstly enters the water distribution device 3 from the mixing box 2 from top to bottom, and then enters the three-phase separator 4 from the water distribution device 3 from bottom to top, and finally treated sewage is discharged from the liquid discharge port 401 of the three-phase separator 4, in the whole sewage treatment process, the flow path of the sewage in the sewage treatment system 100 is longer, so that the retention time of the sewage in the sewage treatment system 100 is longer, and the reagents (the first reagent and the second reagent) can fully react with COD (Chemical Oxygen Demand) in the sewage, so that the reagent utilization rate can be improved, and further, the operation cost of the sewage treatment system 100 can be reduced.

Therefore, the sewage treatment system 100 of the embodiment of the utility model has the advantages of low operation cost and the like.

Optionally, the sewage treatment system 100 comprises a drain pipe 9, a side wall of the drain pipe 9 is communicated with a drain port 401, one end of the drain pipe 9 is used for discharging gas, and the other end of the drain pipe 9 is used for discharging treated sewage. In specific implementation, the other end of the drainage pipe 9 can be communicated with a sewage pool or the like, so that the treated sewage is drained into the sewage pool for later centralized treatment.

For example, as shown in fig. 1, the drain pipe 9 extends in the vertical direction, the middle portion of the drain pipe 9 communicates with the drain port 401, the upper end opening of the drain pipe 9 is used for discharging gas, and the lower end opening of the drain pipe 9 is used for discharging treated sewage.

Optionally, the drain pipe 9 is welded to the housing 1 via a support column.

Alternatively, the three-phase separator 4 may employ a three-phase separator disclosed in utility model patent publication No. CN211595168U or other suitable three-phase separating device.

In some embodiments, the wastewater treatment system 100 further includes a water pump (not shown) having a pump inlet and a pump outlet, the pump inlet being in communication with the second wastewater outlet, and the second wastewater inlet 301 being in communication with the pump outlet.

Therefore, the flow speed of the third wastewater entering the chamber 101 can be increased by using the water pump, so that the hydraulic stirring kinetic energy of the wastewater treatment system 100 can be increased, and the fluid (third wastewater) in the wastewater treatment system 100 can be ensured to keep a good fluidization state, for example, the ascending flow speed of the third wastewater can reach 60 m/h-90 m/h. Thereby can make the medicament mix more evenly with the COD in the sewage, the reaction is more abundant, further improves the medicament utilization ratio, further reduces sewage treatment system 100's running cost.

In some embodiments, the mixing box 2 is disposed within the chamber 101, and the housing 1 has a housing inlet 102 in communication with the first contaminated water inlet, a first drug inlet in communication with the first drug inlet, and a second drug inlet in communication with the second drug inlet. The mixing box 2 has a fourth sewage inlet communicating with the mixing chamber 201, the fourth sewage inlet communicating with the chamber 101.

In particular, the third sewage flowing out of the third sewage outlet 302 of the water distribution device 3 flows upwards in the chamber 101, and the third sewage cannot completely enter the three-phase separator 4. The third sewage which enters the three-phase separator 4 is taken as the first part of sewage, and the third sewage which does not enter the three-phase separator 4 is taken as the second part of sewage. A second part of the sewage flows into the mixing cavity 201 of the mixing box 2 through the fourth sewage inlet, so that the second part of the sewage (third sewage which does not enter the three-phase separator 4) is mixed with the second sewage to form mixed sewage, and the mixed sewage flows into the water distribution device 3 through the water pump and then enters the chamber 101.

Wherein the water volume of the first portion of sewage is substantially equal to the water volume of the first portion of sewage, the water volume of the first portion of sewage is substantially equal to the water volume of the treated sewage, and the water volume of the second portion of sewage is several times to ten times of the water volume of the first portion of sewage. On the one hand, the hydraulic stirring kinetic energy of the sewage treatment system 100 can be greatly improved, thereby further facilitating the full reaction of the medicament with COD in the sewage and further reducing the running cost of the sewage treatment system 100. On the other hand, the utilization rate of the unreacted medicament in the third sewage can be greatly improved, so that the dosing amount of the first medicament and the second medicament can be reduced, and the operation cost of the sewage treatment system 100 is favorably further reduced.

Of course, in other embodiments, the mixing box may not be provided with a fourth waste inlet, and in such cases, the mixing box is not in direct communication with the chamber.

Optionally, the wastewater treatment system 100 includes a liquid inlet pipe 7, one end of the liquid inlet pipe 7 is communicated with the housing inlet 102, and the other end of the liquid inlet pipe 7 is communicated with a source of wastewater, so that the first wastewater enters the mixing box 2 through the liquid inlet pipe 7.

For example, as shown in fig. 1, the liquid inlet pipe 7 extends in the up-down direction, the lower end of the liquid inlet pipe 7 is communicated with the water source of the sewage, and the upper end of the liquid inlet pipe 7 is communicated with the housing inlet 102.

Optionally, the liquid inlet pipe 7 is connected with the shell 1 by welding through a support column.

Alternatively, the mixing box 2 is arranged offset to one side of the housing 1, and a part of the three-phase separator 4 is located at the same height as a part of the mixing box 2.

For example, as shown in fig. 1, the mixing box 2 is disposed offset to the right of the housing 1, a part of the three-phase separator 4 is located on the left of the mixing box 2, and the part of the three-phase separator 4 is flush with the mixing box 2.

Therefore, the mixing box 2 and the three-phase separator 4 are arranged more compactly, so that the overall size of the sewage treatment system 100 is reduced, and the processing cost of the sewage treatment system 100 is reduced. Furthermore, the mixing box 2 is arranged to be deviated to one side of the housing 1, so that the third sewage which does not enter the three-phase separator 4 can have a relatively stable flow direction, and the third sewage which does not enter the three-phase separator 4 can conveniently enter the mixing box 2 through the fourth inlet.

Of course, in other embodiments, the mixing box 2 may also be arranged in the middle of the housing 1, in which case the mixing box 2 is located entirely above the three-phase separator 4.

Optionally, the sewage treatment system 100 comprises a first bracket and a second bracket, both fixed in the housing 1, the mixing box 2 being provided on the first bracket, and the three-phase separator 4 being provided on the second bracket. For example, the first and second supports are welded to the inner wall of the housing 1, the mixing box 2 is connected to the first support by bolts, and the three-phase separator 4 is connected to the second support by bolts.

Alternatively, the water pump is provided outside the housing 1.

For example, the housing 1 has a housing outlet 103 communicating with the second contaminated water outlet. The sewage treatment system 100 further comprises a return pipeline 6 and a second pipeline, wherein the return pipeline 6 is arranged outside the shell 1, the return pipeline 6 is provided with a first pipe orifice and a second pipe orifice, the first pipe orifice is communicated with the shell outlet 103, and the second pipe orifice is communicated with the water pump inlet. The second pipeline is arranged outside the shell 1, the second pipeline is provided with a third pipe orifice and a fourth pipe orifice, the third pipe orifice is communicated with the outlet of the water pump, and the fourth pipe orifice is communicated with the second sewage inlet 301.

For example, the return duct 6 extends in an up-down direction, the housing 1 further has a housing outlet 103 communicating with the second contaminated water outlet, and the first nozzle communicates with the housing outlet 103. The water pump is arranged on the horizontal plane, and the second pipeline extends along the horizontal direction. The second sewage is conveyed into the water distribution device 3 through a water pump.

The water pump is arranged outside the shell 1, so that rotating parts in the chamber 101 can be avoided, and the maintenance of the sewage treatment system 100 is more convenient.

Optionally, the water pump is provided with a plurality ofly, and return line 6 and second pipeline are provided with a plurality ofly, and a plurality of water pumps, a plurality of return line 6 and a plurality of second pipeline one-to-one.

For example, as shown in fig. 3, two water pumps, the return pipe 6, and the second pipe are provided. Every water pump forms a set of pipeline with the return line 6 and the second pipeline that correspond, and the conformal formation is two sets of pipelines, and two sets of pipelines set up along preceding back direction interval.

Optionally, the number of the second sewage inlets 301 is multiple, and the sewage treatment system 100 further includes a plurality of return branch pipes 601, where the plurality of return branch pipes 601 correspond to the plurality of second sewage inlets 301 one to one. One end of the return branch pipeline 601 is communicated with the corresponding second sewage inlet 301, and the other end of the return branch pipeline 601 is communicated with the second return branch pipeline.

For example, as shown in fig. 2, the return ducts 6 are provided in two, and the corresponding second ducts are provided in two. One portion of the plurality of return branch pipes 601 is communicated with one of the second return branch pipes, and the other portion of the plurality of return branch pipes 601 is communicated with the other second return branch pipe. Of course, in other embodiments, only one return line 6 and one second line arrangement may be provided, with multiple return branch lines 601 communicating with the same second return branch line.

Optionally, the return duct 6 is connected to the housing 1 by soldering via support posts.

In some embodiments, the water distribution device 3 is located entirely below the housing 1.

Therefore, the water distribution device 3 is integrally positioned outside the shell 1, and the maintenance and the repair of the water distribution device 3 are facilitated, so that the maintenance and the repair of the sewage treatment system 100 are further facilitated.

In some embodiments, the mud channel is in communication with the chamber 101.

Thereby, the first sludge separated by the three-phase separator 4 is returned to the chamber 101 through the sludge discharge passage, and the first sludge can flow downward by its own weight, so that the first sludge forms an internal circulation in the chamber 101 (flows circularly in the chamber 101). Thereby reducing the loss of the medicament, further improving the utilization rate of the medicament and further reducing the operation cost of the sewage treatment system 100.

In some embodiments, the water distribution device 3 is a swirling flow water distribution device, the swirling flow water distribution device includes a housing 303 and a plurality of nozzles, the housing 303 is disposed on the shell 1, the nozzles are disposed in the housing 303, one part of the plurality of nozzles is a swirling flow nozzle, and another part of the plurality of nozzles is a jet flow nozzle.

For example, the upper end of the housing 303 may have a first flange, the lower end of the housing 1 may have a second flange, and the first flange and the second flange may be fixedly connected by bolts. Six nozzles are arranged, three of the nozzles are swirl nozzles, the other three nozzles are jet nozzles, and the swirl nozzles and the jet nozzles are sequentially and alternately arranged along the circumferential direction of the shell 303.

Therefore, on one hand, the water distribution device 3 can improve the hydraulic stirring kinetic energy of the sewage treatment system 100, so that the third sewage is more uniformly distributed into the chamber 101, which is beneficial to further improving the utilization rate of the medicament and further improving the operation cost of the sewage treatment system 100; on the other hand, the heavier iron-containing sludge may settle to the bottom of the enclosure 303 under the swirling action. In addition, the water distribution device 3 adopts a swirling jet flow water distribution device, so that the blocking risk of the water distribution device 3 can be reduced or even avoided.

In some embodiments, the housing 303 includes a reducing section 3031, the inner diameter of the reducing section 3031 gradually decreases from top to bottom, and the bottom of the reducing section 3031 is provided with a sludge outlet 304.

Thus, the second sludge settled to the bottom of the housing 303 is easily discharged out of the sewage treatment system 100 by the reducer 3031.

For example, as shown in fig. 2, the housing 303 is generally conical, i.e., the housing 303 includes only the reducer portion 3031. Of course, in other embodiments, the housing may be entirely cylindrical.

Optionally, the distance between the nozzle and the bottom end of the housing 303 is L1, the height of the housing 303 is L2, and the ratio of L1 to L2 is one third to three quarters.

Preferably, the ratio of L1 to L2 is one half to two thirds.

Optionally, the sewage treatment system 100 further comprises a sludge hopper 5, the sludge hopper 5 having a sludge inlet 501 and a sludge discharge port 502, the sludge inlet 501 being in communication with the sludge outlet 304.

For example, as shown in fig. 2, the sludge inlet 501 is located below the sludge outlet 304. Thereby, the second sludge settled to the bottom of the housing 303 is discharged with the sludge hopper 5.

Optionally, the sewage treatment system 100 further comprises a sludge discharge pipe 8, one end of the sludge discharge pipe 8 is communicated with the sludge discharge port 502, and the other end of the sludge discharge pipe 8 is used for discharging sludge. For example, the other end of the sludge discharge pipe 8 communicates with a sludge tank, so that the second sludge is discharged into the sludge tank for later centralized treatment.

In some embodiments, the housing 1 is generally cylindrical, and the height to diameter ratio of the housing 1 is 3 to 6.

For example, the casing 1 is cylindrical as a whole, and the height-diameter ratio of the casing 1 is 5.

Thus, for the sewage treatment system 100 with the same capacity, the height-diameter ratio of the housing 1 is set to be larger, and the floor area of the sewage treatment system 100 can be effectively saved.

In some embodiments, the housing 1 has an opening communicating with the chamber 101, the opening being located at an upper end portion of the housing 1, and the sewage treatment system 100 further includes a cover plate 10, the cover plate 10 being mounted on the opening with a gap between the cover plate 10 and the housing 1.

For example, the cover plate 10 is detachably attached to the opening, and the opening can be opened and closed by detaching the cover plate 10.

The cover plate 10 is covered on the opening, so that the sewage treatment system 100 has good visual effect and good running environment, and is beneficial to popularization and use of the sewage treatment system 100.

It should be noted that the cover plate 10 is covered on the opening and cannot completely seal the opening, and gas (for example, oxygen) generated in the sewage treatment process can be discharged to the outside through a gap between the opening and the cover plate 10.

The sewage treatment system 100 of the embodiment of the utility model has the following advantages:

(1) the operation cost is low: the sewage treatment system 100 of the embodiment of the utility model has a longer flow path, so that the retention time of sewage in the sewage treatment system 100 is longer, the reaction between the medicament and the sewage is more sufficient, and the medicament utilization rate is improved; the water distribution device 3 adopts a rotary jet flow water distribution device, so that the ascending flow rate of the sewage in the chamber 101 is high, the fluidization state is good, the mixing effect of the medicament and the sewage can be improved, the reaction of the medicament and the sewage is more sufficient, and the medicament utilization rate is improved; unreacted chemicals are reused through internal circulation (the first sludge circularly flows in the chamber 101), and the utilization rate of the chemicals is improved. In addition, can adjust the addition of first medicament and second medicament according to the volume of sewage volume and COD's in the sewage, avoid extravagant medicament when guaranteeing sewage treatment effect. Thereby reducing the operating cost of the sewage treatment system 100.

(2) The blocking risk is less: the water distribution device 3 adopts a rotary jet flow water distribution device, so that the blockage of the sewage treatment system 100 can be effectively reduced or even avoided.

(3) The occupied area is small: the sewage treatment system 100 of the embodiment of the utility model adopts a design with a large height-diameter ratio, so that the occupied area can be effectively saved.

(4) The service life is long: the chamber 101 of the sewage treatment system 100 of the embodiment of the utility model has no rotating part, so that the maintenance and the repair of the sewage treatment system 100 are simple and convenient, and the service life of the sewage treatment system 100 is effectively prolonged.

(5) The operation environment is good: the opening of the chamber 101 is provided with the cover plate 10, so that not only the visual effect of the sewage treatment system 100 is good, but also the operating environment of the sewage treatment system 100 is good.

(6) The operation is stable: the sewage treatment system 100 of the embodiment of the utility model can be controlled by a PLC, so that the sewage treatment system 100 is fast to start, simple to operate and stable to operate.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like 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 present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (12)

1. A wastewater treatment system, comprising:

a housing defining a chamber;

the mixing box is arranged on the shell and is provided with a mixing cavity, and a first sewage inlet, a first medicament inlet, a second medicament inlet and a second sewage outlet which are communicated with the mixing cavity;

the water distribution device is arranged on the shell and positioned below the mixing box, the water distribution device is provided with a second sewage inlet and a third sewage outlet which are communicated, the second sewage inlet is communicated with the second sewage outlet, and the third sewage outlet is communicated with the cavity; and

the three-phase separator, the three-phase separator is established in the cavity, the three-phase separator is located the top of water distribution device, the three-phase separator have the access way and with mud drainage channel and the leakage fluid dram of access way intercommunication, the access way with the cavity intercommunication.

2. The wastewater treatment system of claim 1, further comprising a water pump having a water pump inlet and a water pump outlet, the water pump inlet in communication with the second wastewater outlet, the second wastewater inlet in communication with the water pump outlet.

3. The wastewater treatment system of claim 2, wherein the mixing box is disposed within the chamber, the housing having a housing inlet in communication with the first wastewater inlet, a first drug inlet in communication with the first drug inlet, and a second drug inlet in communication with the second drug inlet, the mixing box having a fourth wastewater inlet in communication with the mixing chamber, the fourth wastewater inlet in communication with the chamber.

4. The wastewater treatment system of claim 3, wherein the mixing box is offset to one side of the housing, and a portion of the three-phase separator is at the same height as a portion of the mixing box.

5. The wastewater treatment system of claim 2, wherein the sludge discharge channel is in communication with the chamber.

6. The wastewater treatment system of any of claims 2-5, wherein the water pump is disposed outside of the housing.

7. The wastewater treatment system of any of claims 1-5, wherein the water distribution device is located entirely below the housing.

8. The wastewater treatment system of any of claims 1-5, wherein the water distribution device is a swirling-flow water distribution device, the swirling-flow water distribution device comprising:

a housing disposed on the housing; and

the plurality of nozzles are arranged in the shell, one part of the plurality of nozzles is a swirl nozzle, and the other part of the plurality of nozzles is a jet nozzle.

9. The wastewater treatment system according to claim 8, wherein the housing includes a tapered section having an inner diameter gradually decreasing from top to bottom, and a sludge outlet is provided at a bottom of the tapered section.

10. The wastewater treatment system of claim 9, further comprising a sludge hopper having a sludge inlet and a sludge discharge, the sludge inlet in communication with the sludge outlet.

11. The wastewater treatment system according to any of claims 1 to 5, wherein the housing has an overall cylindrical shape, and the height/diameter ratio of the housing is 3 to 6.

12. The wastewater treatment system of any of claims 1-5, wherein the housing has an opening in communication with the chamber, the opening being located at an upper end of the housing, the wastewater treatment system further comprising a cover plate mounted over the opening, the cover plate and the housing having a gap therebetween.

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