A neutralization tank, system, and method for waste liquid treatment

Abstract

This invention discloses a neutralization tank, system, and method for waste liquid treatment. The neutralization tank includes a neutralization vessel with a rotating assembly connected inside. The neutralization tank contains multiple first and second stirring blades connected to the rotating assembly. Each of the first and second stirring blades has a rotating straight-groove orifice assembly capable of rotation. A neutralization delivery orifice assembly is located within the rotating straight-groove orifice assembly. The neutralization tank is equipped with an alkaline liquid delivery assembly and an acidic liquid delivery assembly. Because the rotating straight-groove orifice assembly maintains rotation and circumferential states at different angles, the alkaline and acidic liquid delivery assemblies ensure the delivery of acidic and alkaline substances, guaranteeing that the rotating straight-groove orifice assembly can output acidic and alkaline substances at different angles, significantly improving mixing and stirring quality.

Description

Technical Field

[0001] This invention relates to waste liquid neutralization and treatment systems, and more particularly to a neutralization tank, system, and method for waste liquid treatment. Background Technology

[0002] In many fields today, such as industrial manufacturing, chemical production, and laboratory research, the amount of waste liquid generated is increasing daily. With the continuous tightening of environmental regulations and the increasing public concern for the ecological environment, how to properly treat waste liquid has become a key problem that urgently needs to be solved. Traditional waste liquid treatment involves adding acidic or alkaline substances and stirring the waste liquid to achieve mixing. However, because the acidic or alkaline substances can only be added from a certain point during the mixing process, the addition of acidic or alkaline substances into the waste liquid is uneven, increasing the required stirring and mixing time, and the mixing effect is not good. Waste liquid treatment technology has serious shortcomings in terms of the accuracy and efficiency of acid-base mixing, and innovation and improvement are urgently needed to achieve better acid-base mixing.

[0003] Therefore, the existing waste liquid neutralization and treatment system needs further improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a neutralization tank, system, and method for waste liquid treatment, which can add acidic and alkaline substances more evenly into the waste liquid and achieve better mixing effect.

[0005] To achieve the above objectives, the present invention adopts the following solution:

[0006] A neutralization tank for waste liquid treatment includes a neutralization tank, a rotating assembly connected inside the neutralization tank, a plurality of first stirring blades and a plurality of second stirring blades connected to the rotating assembly inside the neutralization tank, a rotating straight groove hole assembly capable of rotation angle on each of the first stirring blades and the second stirring blades, a neutralization inlet hole assembly inside the rotating straight groove hole assembly, and an alkaline liquid delivery assembly and an acidic liquid delivery assembly on the neutralization tank;

[0007] The first and second stirring blades drive the plurality of the rotating straight slot hole assemblies to rotate around the vertical axis of the rotating assembly.

[0008] The rotary straight slot hole assembly rotates along the longitudinal axis;

[0009] A self-rotating transmission component is provided between the neutralization tank and the rotating straight slot hole assembly;

[0010] The alkaline liquid delivery assembly is used to deliver alkaline substances to the continuously rotating first stirring blade and discharge them from the corresponding delivery port assembly;

[0011] The acidic liquid delivery assembly is used to deliver acidic substances to the continuously rotating second stirring blade and discharge them from the corresponding delivery port assembly;

[0012] A stirring blade structure is provided on one side of the rotating straight slot hole assembly.

[0013] Furthermore, the neutralization tank includes multiple support rods, with a tank body positioned above the multiple support rods. A waste liquid inlet is positioned above the tank body, and a treated liquid outlet is positioned below it.

[0014] The rotating assembly includes a stirring motor, the output end of which is connected to a stirring shaft extending to the middle of the tank.

[0015] Furthermore, the number of the first stirring blades and the second stirring blades are the same, and they are staggered in a clockwise direction around the stirring axis;

[0016] The rotating straight groove hole assembly includes a rotating circular plate, with annular openings provided on the first stirring blade and the second stirring blade, the rotating circular plate being rotatably installed in the annular openings, and a straight groove opening provided in the middle of the rotating circular plate.

[0017] Furthermore, the neutralization infusion port assembly includes a plurality of infusion ports disposed on both sides of the straight groove opening, wherein the infusion ports extend from the inner wall of the straight groove opening to the outer wall of the rotating circular plate;

[0018] The alkaline liquid delivery assembly and the acidic liquid delivery assembly are respectively located above and below the tank.

[0019] Furthermore, the alkaline liquid conveying assembly includes an upper annular guide groove disposed on the upper surface of the inner wall of the tank, an upper sealing rotating plate rotatably disposed within the upper annular guide groove, a first connecting pipe disposed on the upper edge of the first stirring blade, the first connecting pipe being connected to the upper annular guide groove, an annular water conveying groove disposed within the annular opening, the annular water conveying groove being sealed by the rotating circular plate, the liquid conveying hole being connected to a corresponding annular water conveying groove, and the first connecting pipe being connected to a corresponding annular water conveying groove;

[0020] An alkaline liquid input terminal assembly, which is connected to the upper annular guide channel, is provided above the tank.

[0021] Furthermore, the acidic liquid conveying assembly includes a lower annular guide groove disposed on the lower surface of the inner wall of the tank, a lower sealing rotating plate rotatably disposed in the lower annular guide groove, a second connecting pipe disposed on the lower edge of the second stirring blade, the second connecting pipe being connected to the lower annular guide groove, and the second connecting pipe being connected to a corresponding annular water conveying tank;

[0022] An acidic liquid input terminal assembly, which is connected to the lower annular guide channel, is provided below the tank.

[0023] Furthermore, the self-rotating transmission assembly includes an annular rack disposed on the neutralization tank, the annular rack being connected to the rotating assembly, a first bevel gear being disposed on the outer circumference of the rotating circular plate, a transmission shaft sleeve being disposed on the sidewall of the first stirring blade and the second stirring blade, a transmission shaft being rotatably mounted on the transmission shaft sleeve, a second bevel gear being disposed on the inner end of the transmission shaft, the second bevel gear meshing with a corresponding first bevel gear, a driven gear being disposed on the outer end of the transmission shaft, the driven gear meshing with the annular rack.

[0024] Furthermore, the stirring blade structure includes multiple U-shaped stirring rods extending from one side of the straight slot opening to the other side.

[0025] A waste liquid treatment system includes a neutralization tank for waste liquid treatment according to any one of the above claims, a waste discharge end is provided above the neutralization tank, the waste discharge end is connected to a spray tower system; the treated liquid output end is connected to a filtration system, one end of the filtration system is connected to a displacement system, and one side of the displacement system is connected to a water purification system.

[0026] A method for treating waste liquid, using the aforementioned waste liquid treatment system, includes the following steps:

[0027] The process includes step one: inputting waste liquid into the neutralization tank through the waste liquid input terminal and detecting the pH value of the waste liquid;

[0028] Step 2: Calculate the mass of acidic or alkaline substances required for neutralization based on the stoichiometric relationship of the acid-base neutralization reaction of the waste liquid;

[0029] Step 3: Acidic and alkaline substances are discharged from the rotating straight groove hole assembly corresponding to the first and second stirring blades, respectively, and the rotating rotating straight groove hole assembly premixes the waste liquid.

[0030] Step 4: The premixed waste liquid is discharged from the rear end of the rotating straight slot assembly, and is further mixed and stirred by the continuously rotating stirring blade structure.

[0031] Step 5: Monitor the pH value of the waste liquid in real time, and add appropriate acidic or alkaline substances according to the changes to achieve the expected pH value.

[0032] In summary, the advantages of this invention over the prior art are:

[0033] This invention addresses the shortcomings of existing waste liquid neutralization and treatment systems. Through its structural design, it offers the following advantages: multiple stirring blades rotate and cover one side of the neutralization tank, allowing the waste liquid to pass only through a narrow rotating straight-groove orifice assembly. The smaller orifice increases the pressure difference between the waste liquid and the acid / alkali, promoting faster interpenetration and diffusion, thus accelerating the mixing process. Simultaneously, the rotating straight-groove orifice assembly, maintaining its rotational state, ensures a continuous flow of waste liquid through the tank. Furthermore, the rotating straight-groove orifice assembly itself rotates, allowing waste liquid to enter at different angles during rotation, ensuring uniform mixing. When the liquid enters the rotating straight groove orifice assembly, acidic and alkaline substances are added from all sides of the assembly, allowing them to better integrate into the waste liquid for mixing. After passing through the rotating straight groove orifice assembly, the waste liquid and acidic and alkaline substances are stirred again by the stirring blade assembly, further improving the mixing effect. Because the rotating straight groove orifice assembly maintains its rotation and circumferential state at different angles, alkaline liquid conveying components and acidic liquid conveying components are provided to maintain the delivery of acidic and alkaline substances. This ensures that the rotating straight groove orifice assembly can output acidic and alkaline substances at different angles, greatly improving the mixing quality and stirring quality. Attached Figure Description

[0034] Figure 1 This is the front view of the present invention;

[0035] Figure 2 This is one of the cross-sectional views of the present invention;

[0036] Figure 3 This is a second cross-sectional view of the present invention;

[0037] Figure 4 This is one of the internal structural diagrams of the present invention;

[0038] Figure 5 This is a second schematic diagram of the internal structure of the present invention;

[0039] Figure 6 for Figure 5 Enlarged view of a portion at point A;

[0040] Figure 7 This is the third sectional view of the present invention;

[0041] Figure 8 for Figure 7 A magnified view of section B;

[0042] Figure 9 This is the fourth sectional view of the present invention;

[0043] Figure 10 for Figure 9 A magnified view of a portion at point C;

[0044] Figure 11This is one of the exploded views of the present invention;

[0045] Figure 12 This is the second exploded view of the present invention. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please see Figures 1-12 The present invention provides a neutralization tank for waste liquid treatment, including a neutralization tank 1, a rotating assembly 2 connected inside the neutralization tank 1, a plurality of first stirring blades 3 and a plurality of second stirring blades 4 connected to the rotating assembly 2 inside the neutralization tank 1, a rotating straight groove hole assembly 5 that can rotate at an angle on each of the first stirring blades 3 and the second stirring blades 4, a neutralization delivery hole assembly 6 inside the rotating straight groove hole assembly 5, and an alkaline liquid delivery assembly 7 and an acidic liquid delivery assembly 8 on the neutralization tank 1;

[0048] The first stirring blade 3 and the second stirring blade 4 drive the plurality of the rotating straight slot hole assemblies 5 to rotate around the vertical axis of the rotating assembly 2.

[0049] The rotating straight slot hole assembly 5 rotates along the longitudinal axis;

[0050] A self-rotating transmission component 9 is provided between the neutralization tank 1 and the rotating straight slot hole assembly 5;

[0051] The alkaline liquid delivery assembly 7 is used to deliver alkaline substances to the continuously rotating first stirring blade 3 and discharge them from the corresponding delivery hole assembly 6;

[0052] The acidic liquid delivery assembly 8 is used to deliver acidic substances to the continuously rotating second stirring blade 4 and discharge them from the corresponding delivery hole assembly 6;

[0053] A stirring blade structure 10 is provided on one side of the rotating straight slot hole assembly 5.

[0054] The neutralization tank 1 of the present invention includes a plurality of support rods 101, and a tank body 102 is arranged above the plurality of support rods 101. A waste liquid input end 103 is arranged above the tank body 102 and a treatment liquid output end 104 is arranged below the tank body 102.

[0055] The rotating assembly 2 includes a stirring motor 201, the output end of which is connected to a stirring shaft 202 extending to the middle of the tank 102.

[0056] The first stirring blade 3 and the second stirring blade 4 of the present invention are the same in number and are staggered in a clockwise direction around the stirring central axis 202;

[0057] The rotating straight groove hole assembly 5 includes a rotating circular plate 501, and an annular opening 502 is provided on the first stirring blade 3 and the second stirring blade 4 respectively. The rotating circular plate 501 is rotatably installed in the annular opening 502, and a straight groove opening 503 is provided in the middle of the rotating circular plate 501.

[0058] Waste liquid is input into the neutralization tank 1 from the waste liquid input terminal 103. At this time, the stirring motor 201 is started. The stirring motor 201 drives the stirring shaft 202 to rotate. The stirring shaft 202 drives multiple first stirring blades 3 and second stirring blades 4 to rotate around the vertical axis of the stirring shaft 202 in the neutralization tank 1.

[0059] The pH value inside the neutralization tank 1 is detected by a detection device during the process;

[0060] When the acidity value is high, the alkaline liquid delivery component 7 is activated to input the liquid.

[0061] When the alkalinity value is high, the acidic liquid delivery component 8 is activated to input the liquid.

[0062] During the rotation of the first stirring blade 3 and the second stirring blade 4, the corresponding rotating straight groove hole assembly 5 will rotate. The multiple first stirring blades 3 and the second stirring blades 4 divide the neutralization tank 1 into multiple spaces, and the waste liquid can only move from one space to another through the rotating straight groove hole assembly 5.

[0063] When the waste liquid enters the rotating straight groove hole assembly 5, the hole diameter becomes smaller. The smaller hole can increase the pressure difference when the waste liquid comes into contact with the acid and alkali to a certain extent, which promotes the two to penetrate and diffuse more quickly and speeds up the mixing process.

[0064] When the waste liquid enters the position of the rotating straight groove hole assembly 5, the corresponding rotating straight groove hole assembly 5 can output acidic or alkaline substances through the corresponding infusion hole assembly 6. The acidic or alkaline substances are output from the infusion hole assembly 6 into the rotating straight groove hole assembly 5, and are just enough to be mixed with the waste liquid passing through under pressure.

[0065] When the waste liquid is output to the rear of the rotary straight slot hole assembly 5, it is further stirred and mixed by the rear stirring blade structure 10.

[0066] Since the rotating straight slot hole assembly 5 is in a continuous rotational and self-rotating state, it is necessary to maintain the conveying state of external alkaline or acidic substances through the alkaline liquid conveying assembly 7 or the acidic liquid conveying assembly 8.

[0067] The self-rotating transmission component 9 automatically drives the rotating straight slot hole component 5 to rotate during its rotation. The multi-angle rotation of the rotating straight slot hole component 5 can improve the stirring treatment of waste liquid at different positions and improve the uniformity of stirring.

[0068] The neutralization infusion hole assembly 6 of the present invention includes a plurality of infusion holes 601 disposed on both sides of the straight groove opening 503, wherein the infusion holes 601 penetrate from the inner wall of the straight groove opening 503 to the outer wall of the rotating circular plate 501.

[0069] The alkaline liquid conveying assembly 7 and the acidic liquid conveying assembly 8 are respectively located above and below the tank body 102.

[0070] The alkaline liquid delivery assembly 7 of the present invention includes an upper annular guide groove 701 disposed on the upper surface of the inner wall of the tank 102, an upper sealing rotating plate 702 rotatably disposed within the upper annular guide groove 701, a first connecting pipe 703 disposed on the upper edge of the first stirring blade 3, the first connecting pipe 703 being connected to the upper annular guide groove 701, an annular water delivery groove 704 disposed within the annular opening 502, the annular water delivery groove 704 being sealed by the rotating circular plate 501, a liquid delivery hole 601 being connected to a corresponding annular water delivery groove 704, and the first connecting pipe 703 being connected to a corresponding annular water delivery groove 704;

[0071] An alkaline liquid input terminal assembly 705, which is connected to the upper annular guide channel 701, is provided above the tank body 102;

[0072] Waste liquid is input from the alkaline liquid input terminal assembly 705. The alkaline liquid enters the fixedly installed upper annular guide channel 701, while the upper sealing rotating plate 702 rotates with the first stirring blade 3. Correspondingly, the upper sealing rotating plate 702 and multiple first connecting pipes 703 also rotate along the path direction of the upper annular guide channel 701, ensuring that the rotation range of the first connecting pipes 703 is always in communication with the upper annular guide channel 701; the alkaline liquid enters the first... A connecting pipe 703 is inserted into an annular water delivery tank 704 inside the first stirring blade 3. A rotating circular plate 501 is provided on the inner side of the annular water delivery tank 704. The rotating circular plate 501 rotates around the inner wall of the annular water delivery tank 704 and seals the annular water delivery tank 704. The annular water delivery tank 704 is always connected to the multiple infusion holes 601 on the rotating circular plate 501, ensuring that the infusion holes 601 can be connected to the alkaline liquid input terminal assembly 705 at different angles.

[0073] The acidic liquid conveying assembly 8 of the present invention includes a lower annular guide groove 801 disposed on the lower surface of the inner wall of the tank 102, a lower sealing rotating plate 802 rotatably disposed inside the lower annular guide groove 801, a second connecting pipe 803 disposed on the lower edge of the second stirring blade 4, the second connecting pipe 803 being connected to the lower annular guide groove 801, and the second connecting pipe 803 being connected to a corresponding annular water conveying tank 704;

[0074] An acidic liquid input terminal assembly 804, which is connected to the lower annular guide channel 801, is provided below the tank body 102.

[0075] Acidic liquid is input from the acidic liquid delivery component 8, and the process is the same as that for alkaline liquid input, and finally discharged from the corresponding infusion port 601.

[0076] The self-rotating transmission assembly 9 of the present invention includes an annular rack 901 disposed on the neutralization tank 1, a first bevel gear 902 disposed on the outer circumference of the rotating circular plate 501, a transmission shaft sleeve 903 disposed on the side wall of the first stirring blade 3 and the second stirring blade 4, a transmission shaft 904 rotatably mounted on the transmission shaft sleeve 903, a second bevel gear 905 disposed on the inner end of the transmission shaft 904, the second bevel gear 905 meshing with a corresponding first bevel gear 902, and a driven gear 906 disposed on the outer end of the transmission shaft 904, the driven gear 906 meshing with the annular rack 901.

[0077] The annular rack 901 is connected to the rotating assembly 2.

[0078] When the first stirring blade 3 and the second stirring blade 4 rotate, they will drive the corresponding transmission shaft sleeve 903, transmission shaft 904 and driven gear 906 to rotate as well. During the rotation, the driven gear 906 will always mesh with the fixedly set annular rack 901. At this time, the annular rack 901 drives the driven gear 906 to rotate. The driven gear 906 drives the transmission shaft 904 and the second bevel gear 905 to rotate synchronously. The second bevel gear 905 drives the first bevel gear 902. The first bevel gear 902 drives the corresponding rotating circular plate 501 to continuously rotate during the rotation.

[0079] The stirring blade structure 10 of the present invention includes multiple U-shaped stirring rods 1001 extending from one side of the straight groove opening 503 to the other side.

[0080] The present invention also provides a waste liquid treatment system, including a neutralization tank for waste liquid treatment according to any of the above embodiments. A waste discharge end is provided above the neutralization tank 1, and the waste discharge end is connected to a spray tower system; the treated liquid output end 104 is connected to a filtration system, one end of the filtration system is connected to a displacement system, and one side of the displacement system is connected to a water purification system.

[0081] The present invention also provides a method for treating waste liquid, using a waste liquid treatment system according to the above embodiments, comprising the following steps:

[0082] Step 1: Input waste liquid into the neutralization tank 1 through the waste liquid input terminal 103, and detect the pH value of the waste liquid;

[0083] Step 2: Calculate the mass of acidic or alkaline substances required for neutralization based on the stoichiometric relationship of the acid-base neutralization reaction of the waste liquid;

[0084] Step 3: Acidic and alkaline substances are discharged from the rotating straight groove orifice assembly 5 corresponding to the first stirring blade 3 and the second stirring blade 4, respectively, and the rotating rotating straight groove orifice assembly 5 premixes the waste liquid.

[0085] Step 4: The premixed waste liquid is discharged from the rear end of the rotating straight slot assembly 5, and is further mixed and stirred by the continuously rotating stirring blade structure 10.

[0086] Step 5: Monitor the pH value of the waste liquid in real time, and add appropriate acidic or alkaline substances according to the changes to achieve the expected pH value.

[0087] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A neutralization tank for waste liquid treatment, comprising a neutralization tank (1), wherein a rotating assembly (2) is connected inside the neutralization tank (1), characterized in that: The neutralization tank (1) is provided with a plurality of first stirring blades (3) and a plurality of second stirring blades (4) connected to the rotating assembly (2). Each of the first stirring blades (3) and the second stirring blades (4) is provided with a rotating straight groove hole assembly (5) that can rotate at an angle. The rotating straight groove hole assembly (5) is provided with a neutralization infusion hole assembly (6). The neutralization tank (1) is provided with an alkaline liquid delivery assembly (7) and an acidic liquid delivery assembly (8). The first stirring blade (3) and the second stirring blade (4) drive multiple rotating straight slot hole assemblies (5) to rotate around the vertical axis of the rotating assembly (2). The rotating straight slot hole assembly (5) includes a rotating circular plate (501). Each of the first stirring blade (3) and the second stirring blade (4) is provided with an annular opening (502). The rotating circular plate (501) is rotatably installed in the annular opening (502). A straight slot opening (503) is provided in the middle of the rotating circular plate (501). The rotating straight slot hole assembly (5) rotates along the longitudinal axis; A self-rotation transmission component (9) is provided between the neutralization tank (1) and the rotating straight slot hole assembly (5). The self-rotation transmission component (9) is used to drive the corresponding rotating circular plate (501) to rotate continuously during the rotation process. The alkaline liquid delivery assembly (7) is used to deliver alkaline substances to the continuously rotating first stirring blade (3) and discharge them from the corresponding delivery hole assembly (6); The acidic liquid delivery assembly (8) is used to deliver acidic substances to the continuously rotating second stirring blade (4) and discharge them from the corresponding delivery hole assembly (6); The rotating straight slot hole assembly (5) is provided with a stirring blade structure (10) on one side.

2. The neutralization tank for waste liquid treatment according to claim 1, characterized in that: The neutralization tank (1) includes multiple support rods (101), and a tank body (102) is provided above the multiple support rods (101). A waste liquid inlet (103) is provided above the tank body (102), and a treatment liquid outlet (104) is provided below it. The rotating assembly (2) includes a stirring motor (201), the output end of which is connected to a stirring shaft (202) extending to the middle of the tank (102).

3. The neutralization tank for waste liquid treatment according to claim 2, characterized in that: The number of the first stirring blade (3) and the second stirring blade (4) are the same, and they are staggered in a clockwise direction around the stirring axis (202).

4. A neutralization tank for waste liquid treatment according to claim 3, characterized in that: The neutralization infusion hole assembly (6) includes a plurality of infusion holes (601) disposed on both sides of the straight groove opening (503), wherein the infusion holes (601) extend from the inner wall of the straight groove opening (503) to the outer wall of the rotating circular plate (501). The alkaline liquid delivery assembly (7) and the acidic liquid delivery assembly (8) are respectively located above and below the tank body (102).

5. A neutralization tank for waste liquid treatment according to claim 4, characterized in that: The alkaline liquid delivery assembly (7) includes an upper annular guide groove (701) disposed on the upper surface of the inner wall of the tank (102), an upper sealing rotating plate (702) rotatably disposed inside the upper annular guide groove (701), a first connecting pipe (703) disposed on the upper edge of the first stirring blade (3), the first connecting pipe (703) being connected to the upper annular guide groove (701), an annular water delivery groove (704) disposed inside the annular opening (502), the annular water delivery groove (704) being sealed by the rotating circular plate (501), the liquid delivery hole (601) being connected to a corresponding annular water delivery groove (704), and the first connecting pipe (703) being connected to a corresponding annular water delivery groove (704). An alkaline liquid input terminal assembly (705) is provided above the tank (102) and communicates with the upper annular guide channel (701).

6. A neutralization tank for waste liquid treatment according to claim 5, characterized in that: The acidic liquid conveying assembly (8) includes a lower annular guide groove (801) disposed on the lower surface of the inner wall of the tank (102), a lower sealing rotating plate (802) is rotatably disposed inside the lower annular guide groove (801), a second connecting pipe (803) is disposed on the lower edge of the second stirring blade (4), the second connecting pipe (803) is connected to the lower annular guide groove (801), and the second connecting pipe (803) is connected to a corresponding annular water conveying tank (704); An acidic liquid input terminal assembly (804) is provided below the tank body (102) and communicates with the lower annular guide channel (801).

7. A neutralization tank for waste liquid treatment according to claim 6, characterized in that: The self-rotating transmission assembly (9) includes an annular rack (901) disposed on the neutralization tank (1), the annular rack (901) being connected to the rotating assembly (2), a first bevel gear (902) being disposed on the outer circumference of the rotating circular plate (501), a transmission shaft sleeve (903) being disposed on the side wall of the first stirring blade (3) and the second stirring blade (4), a transmission shaft (904) being rotatably mounted on the transmission shaft sleeve (903), a second bevel gear (905) being disposed on the inner end of the transmission shaft (904), the second bevel gear (905) meshing with a corresponding first bevel gear (902), a driven gear (906) being disposed on the outer end of the transmission shaft (904), the driven gear (906) meshing with the annular rack (901).

8. A neutralization tank for waste liquid treatment according to claim 7, characterized in that: The stirring blade structure (10) includes multiple U-shaped stirring rods (1001) extending from one side of the straight slot opening (503) to the other side.

9. A waste liquid treatment system, characterized in that: The system includes a neutralization tank for waste liquid treatment as described in any one of claims 2-8, with a waste discharge end provided above the neutralization tank (1), the waste discharge end being connected to a spray tower system; the treatment liquid output end (104) is connected to a filtration system, one end of the filtration system is connected to a displacement system, and one side of the displacement system is connected to a water purification system.

10. A method for treating waste liquid, characterized in that: Using the waste liquid treatment system as described in claim 9 includes the following steps: Step 1: Input waste liquid into the neutralization tank (1) through the waste liquid input terminal (103) and detect the pH value of the waste liquid; Step 2: Calculate the mass of acidic or alkaline substances required for neutralization based on the stoichiometric relationship of the acid-base neutralization reaction of the waste liquid; Step 3: Acidic and alkaline substances are discharged from the rotating straight groove hole assembly (5) corresponding to the first stirring blade (3) and the second stirring blade (4), respectively, and the rotating rotating straight groove hole assembly (5) premixes the waste liquid. Step 4: The premixed waste liquid is discharged from the rear end of the rotating straight slot assembly (5) and further mixed and stirred by the continuously rotating stirring blade structure (10); Step 5: Monitor the pH value of the waste liquid in real time, and add appropriate acidic or alkaline substances according to the changes to achieve the expected pH value.

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