Mixing device and sewage treatment equipment thereof

Abstract

The embodiment of the utility model provides a mixing device and sewage treatment equipment thereof. The mixing device comprises a plurality of mixing assemblies; each mixing assembly comprises a mixing pipe and a stirring piece; the mixing pipe is provided with a mixing cavity, and a liquid inlet, a liquid outlet and a liquid injection port which are respectively communicated with the mixing cavity; the plurality of mixing pipes are communicated in series through the liquid inlets and the liquid outlets; the liquid injection port is arranged on the mixing pipe and is closer to the liquid inlet between the liquid inlet and the liquid outlet; the liquid injection port is used for feeding a medicament reacting with sewage; and the stirring piece is rotatably arranged in the mixing cavity. By means of the arrangement, the multiple mixing assemblies are arranged in parallel at intervals, and the multiple mixing pipes are communicated in series through the liquid inlets and the liquid outlets. Therefore, the overall size of the mixing device is reduced, and the occupied space of dephosphorization equipment during installation is reduced when other equipment for dephosphorization or flocculation and the like is added into a pipeline of sewage treatment equipment.

Description

Technical Field

[0001] The present disclosure relates to the field of sewage treatment, and in particular to a mixing device and sewage treatment equipment thereof. Background Art

[0002] Sewage treatment equipment is a treatment equipment that performs phosphorus removal, flocculation, filtration and other processes on sewage. However, when the treatment effect of existing sewage treatment equipment is not good, it is usually necessary to add other sewage treatment equipment to the pipeline of the sewage treatment equipment, such as phosphorus removal equipment, flocculation equipment or other equipment that requires the addition of chemicals to achieve the sewage treatment effect. However, most of these equipment that require the addition of chemicals to achieve the sewage treatment effect are large in size and occupy a large space, so they are not suitable for sewage treatment equipment with small installation space or no space available. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a mixing device and sewage treatment equipment thereof to solve the problems in the related art.

[0004] A first aspect of the present disclosure provides a mixing device, comprising:

[0005] Multiple hybrid components;

[0006] Each of the mixing components comprises a mixing tube and a stirring member, wherein the mixing tube has a mixing chamber and a liquid inlet, a liquid outlet and a liquid injection port respectively connected to the mixing chamber; a plurality of the mixing tubes are connected in series through the liquid inlet and the liquid outlet; the liquid injection port is located on the mixing tube between the liquid inlet and the liquid outlet and is closer to the liquid inlet; the liquid injection port is used to inject a reagent that reacts with sewage; and the stirring member is rotatably arranged in the mixing chamber.

[0007] In an embodiment of the first aspect, the mixing tube extends in a straight direction, the liquid inlet and the liquid outlet are respectively arranged near two ends of the mixing tube; and the multiple mixing components are arranged in parallel and at intervals.

[0008] In an embodiment of the first aspect, the liquid inlet of each mixing tube is closer to the liquid outlet of the liquid inlet and the liquid outlet on the adjacent mixing tube.

[0009] In an embodiment of the first aspect, the agitator includes a plurality of mixing plates and at least one connecting column whose axial direction is parallel to the length direction of the mixing tube, and the plurality of mixing plates are arranged on the connecting column at intervals along the axial direction of the connecting column; each of the mixing plates is provided with at least one through portion.

[0010] In an embodiment of the first aspect, the plurality of mixing plates are implemented as: a plurality of first mixing plates and a plurality of second mixing plates; a plurality of first penetration portions are formed on the outer edge surface of the first mixing plate at intervals along the circumferential direction; and a second penetration portion is formed in the middle of the second mixing plate.

[0011] In an embodiment of the first aspect, the liquid injection port is located between the liquid inlet and the outermost mixing plate.

[0012] In an embodiment of the first aspect, the mixing device further comprises a driving member, an output end of the driving member is axially parallel to the connecting column, axially penetrates the mixing tube and is fixedly connected to the outermost mixing plate.

[0013] In an embodiment of the first aspect, the mixing device is connected to at least one liquid supply component, and the liquid supply component includes a liquid supply tank and a pump body; the drug inlet of the pump body is connected to the liquid supply tank via a pipeline, and the drug outlet of the pump body is connected to at least one of the liquid injection ports via a pipeline.

[0014] In an embodiment of the first aspect, the agent is implemented as at least one of a phosphorus removal agent and a flocculant.

[0015] Another aspect of the present disclosure provides a sewage treatment device, comprising the mixing device, a filtering unit and a microbial treatment unit. The filtering unit is arranged downstream of the mixing device; and the microbial treatment unit is arranged downstream of the filtering unit.

[0016] As described above, the present disclosure provides a mixing device and sewage treatment equipment thereof, including a plurality of mixing components; each of the mixing components: includes a mixing tube and an agitator, the mixing tube has a mixing chamber and a liquid inlet, a liquid outlet and a liquid injection port respectively connected to the mixing chamber; the plurality of mixing tubes are connected in series through the liquid inlet and the liquid outlet; the liquid injection port is closer to the liquid inlet between the liquid inlet and the liquid outlet on the mixing tube; the liquid injection port is used to inject a reagent that reacts with sewage; the agitator is rotatably arranged in the mixing chamber. The sewage treatment equipment includes the mixing device, a filtering unit and a microbial treatment unit. The filtering unit is arranged downstream of the mixing device; the microbial treatment unit is arranged downstream of the filtering unit. Through the above arrangement, the plurality of mixing components are arranged in parallel and spaced apart, and the plurality of mixing tubes are connected in series through the liquid inlet and the liquid outlet. Thereby reducing the overall volume of the mixing device, and further reducing the space occupied by the phosphorus removal equipment during installation when other equipment such as phosphorus removal or flocculation is added to the pipeline of the sewage treatment equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure shows the overall structure schematic diagram of the mixing device in the embodiment of the present disclosure;

[0018] Figure 2 , which is a cross-sectional schematic diagram of the overall structure of the mixing device in the embodiment of the present disclosure;

[0019] Figure 3 FIG. 1 is a connection diagram of a case where two mixing components are implemented in the embodiment of the present disclosure;

[0020] Figure 4 FIG. 1 is a schematic diagram of the structure of the mixing component and the liquid supply component in the embodiment of the present disclosure;

[0021] Figure 5 The figure shows the overall structure of the stirring member in the embodiment of the present disclosure;

[0022] Figure 6 Shown in FIG. 1 is a schematic diagram of the overall structure of a sewage treatment device in another embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] The following is an explanation of the embodiments of the present disclosure by specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the information disclosed by the present disclosure. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in the present disclosure can also be modified or changed in various ways according to different viewpoints and application modules without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0024] The following is a detailed description of the embodiments of the present disclosure with reference to the accompanying drawings so that those skilled in the art can easily implement the present disclosure. The present disclosure can be embodied in many different forms and is not limited to the embodiments described herein.

[0025] In the representations of the present disclosure, the reference terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. Moreover, the specific features, structures, materials or characteristics represented may be combined in any one or a group of embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples represented in the present disclosure and the features of different embodiments or examples, unless they are mutually contradictory.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of the present disclosure, "a group" means two or more, unless otherwise clearly and specifically defined.

[0027] In order to clearly describe the present disclosure, components not related to the description are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

[0028] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0029] Although the terms first, second, etc. are used to represent various elements in this article in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate that there are the described features, steps, operations, elements, modules, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or a group of other features, steps, operations, elements, modules, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0030] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present disclosure. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0031] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which the present disclosure belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with relevant technical literature and the message of the present disclosure, and shall not be overly interpreted as ideal or very formal meanings unless defined.

[0032] Sewage treatment equipment is a treatment equipment that performs phosphorus removal, flocculation, filtration and other processes on sewage. However, when the treatment effect of existing sewage treatment equipment is not good, it is usually necessary to add other sewage treatment equipment to the pipeline of the sewage treatment equipment, such as phosphorus removal equipment, flocculation equipment or other equipment that requires the addition of chemicals to achieve the sewage treatment effect. However, most of these equipment that require the addition of chemicals to achieve the sewage treatment effect are large in size and occupy a large space, so they are not suitable for sewage treatment equipment with small installation space or no space available.

[0033] Based on the above problems, a mixing device is provided in the embodiment of the present disclosure, which realizes phosphorus removal or other treatment processes that require the addition of chemicals through multiple mixing components that are connected in series and can be fed with chemicals, so as to achieve better sewage treatment effects.

[0034] Figure 1 Shown in FIG. 1 is a schematic diagram of the overall structure of the mixing device in an embodiment of the present disclosure. Figure 2 The figure shows a cross-sectional schematic diagram of the overall structure of the mixing device in the embodiment of the present disclosure. Figure 1 and Figure 2 In the example, the mixing device includes a plurality of mixing components 10. Each of the mixing components 10 includes a mixing tube 11 and an agitator 12. The mixing tube 11 has a mixing chamber 1101 and a liquid inlet 1102, a liquid outlet 1103 and a liquid injection port 1104 respectively connected to the mixing chamber 1101. The plurality of mixing tubes 11 are serially connected through the liquid inlet 1102 and the liquid outlet 1103. The liquid injection port 1104 is located on the mixing tube 11 between the liquid inlet 1102 and the liquid outlet 1103 and is closer to the liquid inlet 1102. The liquid injection port 1104 is used to inject a reagent that reacts with sewage; the agitator 12 is rotatably arranged in the mixing chamber 1101.

[0035] Exemplarily, the stirring of the agitator 12 can accelerate the reaction rate of the agent with the sewage in the mixing chamber 1101, thereby further improving the treatment effect of the agent on the sewage. Through the above arrangement, multiple mixing assemblies 10 are arranged in parallel and spaced apart, and multiple mixing tubes 11 are connected in series through the liquid inlet 1102 and the liquid outlet 1103. This reduces the overall volume of the mixing device, thereby reducing the floor space occupied by the dephosphorization device when adding a dephosphorization device to the pipeline of the sewage treatment equipment.

[0036] Those skilled in the art can understand that the injection port 1104 is closer to the liquid inlet 1102, so that the distance between the injection port 1104 and the liquid outlet 1103 is increased. In this way, after the agent is injected into the mixing chamber 1101 through the injection port 1104, the agent can contact and react with the sewage in the mixing chamber 1101 in a sufficiently long flow path, so as to improve the reaction effect of the agent on the sewage. Exemplarily, the agent is implemented as at least one of a dephosphorizing agent and a flocculant.

[0037] Exemplarily, the mixing tube 11 extends in a straight line direction, and the liquid inlet 1102 and the liquid outlet 1103 are respectively arranged near the two ends of the mixing tube 11. Exemplarily, the mixing tube 11 is implemented as a round tube, and the mixing chamber 1101 is adaptively implemented as a mixing chamber 1101 with a circular cross section. In another embodiment, the mixing tube 11 can also be implemented as a square tube, and the mixing chamber 1101 is adaptively implemented as a mixing chamber 1101 with a circular or square cross section. In another embodiment, the mixing tube 11 can also extend in an arc direction. It is understandable that the length of the mixing tube 11 extending in the arc direction increases, thereby increasing the mixing time of the sewage and the reagent.

[0038] Exemplarily, the plurality of mixing assemblies 10 are arranged in parallel and spaced apart, for example, in a direction perpendicular to the straight line direction. And the liquid inlet 1102 of each mixing tube 11 is closer to the liquid inlet 1102 and the liquid outlet 1103 of the adjacent mixing tube 11. Further exemplarily, the liquid outlet 1103 and the liquid inlet 1102 on two adjacent mixing tubes 11 are arranged upside down. Through the above-mentioned arrangement, the spacing between the plurality of mixing tubes 11 can be reduced while the plurality of mixing tubes 11 remain the same length, thereby reducing the overall volume of the mixing device composed of the plurality of mixing assemblies 10, and improving the aesthetics and implementation convenience of the mixing device.

[0039] For example, Figure 3The figure shows a connection diagram when the mixing components are implemented as two in the embodiment of the present disclosure. Figure 3 In the example, the mixing assembly is implemented as two: a first mixing assembly 10A and a second mixing assembly 10B. The first mixing assembly 10A includes a first mixing tube 11A and a first agitator, the first mixing tube 11A having a first mixing chamber and a first liquid inlet 1102A, a first liquid outlet 1103A and a first liquid injection port 1104A respectively connected to the first mixing chamber. The second mixing assembly 10B includes a second mixing tube 11B and a second agitator, the second mixing tube 11B having a second mixing chamber and a second liquid inlet 1102B, a second liquid outlet 1103B and a second liquid injection port 1104 respectively connected to the second mixing chamber. The first liquid outlet 1103A of the first mixing tube 11A is connected to the second liquid inlet 1102B of the second mixing tube 11B. Accordingly, if the mixing assembly is implemented as multiple, the second liquid outlet 1103B of the second mixing tube 11B is connected to the liquid inlet of the next mixing tube.

[0040] Back to Figure 2 In the example, illustratively, the liquid outlet 1103 and the liquid inlet 1102 are both implemented as flange joints. The liquid outlet 1103 implemented as a flange joint is connected to the liquid inlet 1102 by bolts, and a seal (not shown in the figure) is provided between the liquid outlet 1103 and the liquid inlet 1102 to improve the sealing effect and prevent liquid leakage. In another embodiment, the liquid outlet 1103 and the liquid inlet 1102 can also be implemented as openings formed on the outer wall of the mixing tube 11, and then the liquid outlet 1103 and the liquid inlet 1102 are respectively welded through a connecting pipe adapted to the aperture of the opening.

[0041] Back to Figure 2 In the example, each mixing tube 11 is implemented as including a tube body 111 extending in a straight direction and having two openings and two sealing plates 112. The two sealing plates 112 are detachably (bolted) arranged at the two ends of the two-way tube to seal the two openings of the tube body 111. This facilitates the user to install the agitator 12 and to perform subsequent maintenance and replacement, and the inner wall of the tube body 111 can also be cleaned by removing the sealing plates 112.

[0042] Figure 4 The figure shows a schematic diagram of the structure of the mixing component and the liquid supply component in the embodiment of the present disclosure. Figure 4In the example, the liquid supply component 20 includes a liquid supply tank 21 and a pump body 22. The drug inlet of the pump body 22 is connected to the liquid supply tank 21 via a pipeline, and the drug outlet of the pump body 22 is connected to at least one of the injection ports 1104 via a pipeline. Exemplarily, the liquid supply component 20 is implemented in multiples, that is, the number of the liquid supply components 20 is adapted to the number of the mixing components 10. The drug outlet of each of the pump bodies 22 is correspondingly connected to the injection port 1104 on one of the mixing tubes 11. Exemplarily, the pump body 22 is implemented as a micro pump. In another embodiment, the liquid supply component 20 is implemented in one, and the drug outlet of the pump body 22 of the liquid supply component 20 is connected to multiple injection ports 1104 via multiple pipelines.

[0043] Figure 5 The figure shows the overall structure of the stirring member in the embodiment of the present disclosure. Figure 5 In the example, the agitator 12 includes a plurality of mixing plates and at least one connecting column 122 whose axial direction is parallel to the length direction of the mixing tube. The plurality of mixing plates are arranged on the connecting column 122 at intervals along the axial direction of the connecting column 122. Each of the mixing plates is provided with at least one through portion. Exemplarily, the connecting column 122 is implemented as a plurality of connecting columns 122, and the plurality of connecting columns 122 are arranged on the plurality of connecting columns 122 at intervals along the axial direction of the mixing chamber having a circular cross section. In order to improve the overall strength and stability of the agitator 12.

[0044] Exemplarily, the injection port is located between the liquid inlet and the outermost mixing plate, so as to further increase the time for the medicine and sewage injected through the injection port to be stirred and mixed by the agitator 12, thereby improving the reaction effect of the medicine and sewage.

[0045] Back to Figure 2 In the example, the cross section of the mixing chamber 1101 is implemented as a circle, and the mixing plate is also implemented as a circle. Exemplarily, the agitator 12 is coaxially arranged with the mixing chamber 1101, and the size of the mixing plate is adapted to the cross-sectional size of the mixing chamber 1101. Through the above arrangement, it is possible to prevent the sewage from flowing through the gap between the mixing plate and the inner wall of the mixing chamber 1101 when flowing from the mixing chamber 1101, thereby ensuring that the sewage can flow through the through portion on the mixing plate when flowing from the mixing chamber 1101, so as to improve the mixing effect of the mixing assembly.

[0046] exist Figure 5In the example, the plurality of mixing plates are implemented as: a plurality of first mixing plates 121A and a plurality of second mixing plates 121B. The outer edge surface of the first mixing plate 121A is formed with a plurality of first penetrations 12101 spaced apart in the circumferential direction; a second penetration 12102 is formed in the middle of the second mixing plate 121B; the first penetration 12101 is implemented as a notch, and the second penetration 12102 is implemented as a through hole. Further exemplarily, the first mixing plates 121A and the second mixing plates 121B can be alternately arranged on the connecting column 122 along the axial direction of the mixing chamber.

[0047] It can be understood by those skilled in the art that the mixture of sewage and medicine is divided into multiple streams of liquid when passing through the multiple first penetrations 12101 of the first mixing plate 121A, and the multiple streams of liquid are collected and mixed again by the second penetration 12102 located in the middle when passing through the second mixing plate 121B. Therefore, repeating the above process several times in the mixing tube can further improve the mixing effect of the medicine and sewage, so as to improve the reaction effect of the medicine and sewage. In another embodiment, the spacing between the multiple mixing plates is adjustable and arranged on the connecting column 122.

[0048] In another embodiment, the penetration portions of the two second mixing plates 121B are staggered, so that the turbulence of the liquid in the mixing tube can be increased by changing the flow direction of the liquid when passing through the two separated second mixing plates 121B, thereby improving the mixing efficiency of the medicine and sewage.

[0049] exist Figure 5 In the example, the mixing device further includes a driving member 123, the output end of the driving member 123 is axially parallel to the connecting column 122, axially penetrates the mixing tube and is fixedly connected to the outermost mixing plate. Exemplarily, the driving member 123 is implemented as a motor. A sealing member (not shown in the figure) is provided in the gap between the output end of the motor and the mixing tube. Driven by the driving member 123, the agitator 12 rotates during mixing, thereby continuously changing the position of the through-portion of the mixing plate, so that the position of the liquid flowing out through the through-portion of the same mixing plate each time is different, thereby improving the mixing effect of the medicine and sewage.

[0050] In another embodiment, the opposite walls of two adjacent mixing plates are respectively provided with stirring plates extending or inclined along the length direction of the connecting column 122, so as to further improve the mixing effect of the medicine and sewage when the stirring member 12 rotates.

[0051] Figure 6 The figure shows the overall structure of a sewage treatment device in another embodiment of the present disclosure. Figure 6In an example, another embodiment of the present disclosure provides a sewage treatment device 100, comprising the mixing device, a filtering unit 30 and a microbial treatment unit 40. The filtering unit 30 is disposed downstream of the mixing device; the microbial treatment unit 40 is disposed downstream of the filtering unit 30.

[0052] The filtering unit 30 includes at least one filter, the inlet of which is connected to the liquid outlet 1103 of the mixing pipe 11 close to the filter to receive the sewage mixed by the mixing device.

[0053] The microbial treatment unit 40 includes an anoxic tank, a contact oxidation tank and a sedimentation tank which are connected in sequence. The anoxic tank is connected to the outlet of the filter.

[0054] exist Figure 6 In the example, the dephosphorization agent is put into the first mixing component 10A, and the flocculant is put into the second mixing component 10B. That is, the sewage is first dephosphorized, and then the dephosphorized sewage is flocculated. The filtration unit 30 filters the sewage after dephosphorization and flocculation, and the filtered sewage finally enters the microbial treatment unit 40.

[0055] In summary, the present disclosure provides a mixing device and a sewage treatment device thereof, comprising a plurality of mixing components; each of the mixing components: comprises a mixing tube and a stirring member, the mixing tube having a mixing chamber and a liquid inlet, a liquid outlet and a liquid injection port respectively connected to the mixing chamber; the plurality of mixing tubes are connected in series through the liquid inlet and the liquid outlet; the liquid injection port is located on the mixing tube between the liquid inlet and the liquid outlet and is closer to the liquid inlet; the liquid injection port is used to inject a reagent that reacts with sewage; the stirring member is rotatably arranged in the mixing chamber. The sewage treatment device comprises the mixing device, a filtering unit and a microbial treatment unit. The filtering unit is arranged downstream of the mixing device; the microbial treatment unit is arranged downstream of the filtering unit. Through the above arrangement, the plurality of mixing components are arranged in parallel and spaced apart, and the plurality of mixing tubes are connected in series through the liquid inlet and the liquid outlet. Thereby, the overall volume of the mixing device is reduced, and further, when other equipment such as phosphorus removal or flocculation is added to the pipeline of the sewage treatment device, the space occupied by the phosphorus removal equipment during installation is reduced.

[0056] The above embodiments are merely illustrative of the principles and effects of the present disclosure, and are not intended to limit the present disclosure. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present disclosure. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present disclosure shall still be covered by the protection scope of the present disclosure.

Claims

1. A mixing device, characterized in that Installed in the pipeline of sewage treatment equipment, including: Multiple hybrid components; Each of the mixing components comprises a mixing tube and a stirring member, wherein the mixing tube has a mixing chamber and a liquid inlet, a liquid outlet and a liquid injection port respectively connected to the mixing chamber; a plurality of the mixing tubes are connected in series through the liquid inlet and the liquid outlet; the liquid injection port is located on the mixing tube between the liquid inlet and the liquid outlet and is closer to the liquid inlet; the liquid injection port is used to inject a reagent that reacts with sewage; and the stirring member is rotatably arranged in the mixing chamber.

2. The mixing device according to claim 1, characterized in that The mixing tube extends in a straight line direction, the liquid inlet and the liquid outlet are respectively arranged near two ends of the mixing tube; and the multiple mixing components are arranged in parallel and at intervals.

3. The mixing device according to claim 1, characterized in that The liquid inlet of each mixing tube is closer to the liquid outlet of the liquid inlet and the liquid outlet on the adjacent mixing tube.

4. The mixing device according to claim 1, characterized in that The agitator comprises a plurality of mixing plates and at least one connecting column whose axial direction is parallel to the length direction of the mixing tube. The plurality of mixing plates are arranged on the connecting column at intervals along the axial direction of the connecting column. Each of the mixing plates is provided with at least one through portion.

5. The mixing device according to claim 4, characterized in that The plurality of mixing plates are implemented as: a plurality of first mixing plates and a plurality of second mixing plates; a plurality of first penetrations are formed on the outer edge surface of the first mixing plate at intervals along the circumferential direction; a second penetration is formed in the middle of the second mixing plate.

6. The mixing device according to claim 4, characterized in that The liquid injection port is located between the liquid inlet and the outermost mixing plate.

7. The mixing device according to claim 4, characterized in that The mixing device further comprises a driving member, the output end of which is axially parallel to the connecting column, axially penetrates the mixing tube and is fixedly connected to the outermost mixing plate.

8. The mixing device according to claim 1, characterized in that The mixing device is connected to at least one liquid supply component, which includes a liquid supply tank and a pump body; the drug inlet of the pump body is connected to the liquid supply tank via a pipeline, and the drug outlet of the pump body is connected to at least one of the injection ports via a pipeline.

9. The mixing device according to claim 1, characterized in that The agent is implemented as at least one of a dephosphorizing agent and a flocculant.

10. A sewage treatment equipment, characterized in that: include: A mixing device as claimed in any one of claims 1 to 9; A filtering unit, disposed downstream of the mixing device; The microbial treatment unit is arranged downstream of the filtering unit.

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