Neutralization tank, system and method for waste liquid treatment

Abstract

The invention discloses a neutralization tank, system and method for waste liquid treatment. The neutralizing tank for waste liquid treatment comprises a neutralizing tank body, a rotating assembly is connected in the neutralizing tank body, a plurality of first stirring blades and a plurality of second stirring blades which are connected with the rotating assembly are arranged in the neutralizing tank body, and rotating straight slot hole assemblies capable of rotating by an angle are arranged on the first stirring blades and the second stirring blades respectively. A neutralizing liquid conveying hole assembly is arranged in the rotating straight slot assembly, and an alkaline liquid conveying assembly and an acid liquid conveying assembly are arranged on the neutralizing tank. Therefore, the alkaline liquid conveying assembly and the acid liquid conveying assembly are arranged to keep conveying of acid and alkali substances, it is guaranteed that the rotary straight slot assembly can output the acid and alkali substances in different angle states, the mixing quality is greatly improved, and the stirring quality is improved.

Description

Technical Field

[0001] The invention relates to a waste liquid neutralization treatment system, and in particular to a neutralization tank, system and method for waste liquid treatment. Background Art

[0002] In many fields today, such as industrial manufacturing, chemical production, laboratory research, etc., the amount of waste liquid generated is increasing day by day. With the continuous tightening of environmental protection regulations and the increasing attention paid to the ecological environment, how to properly handle waste liquid has become a key problem that needs to be overcome. Traditional waste liquid is mixed by adding acid and alkali substances and stirring the waste liquid. During the mixing process, since the acid and alkali substances can only be added from a certain position, the acid and alkali substances are added to the waste liquid unevenly, the required stirring and mixing time is increased, and the mixing effect is not good. Waste liquid treatment technology has serious shortcomings in the accuracy and efficiency of acid and alkali mixing, and urgently needs innovation and improvement to achieve better acid and alkali mixing.

[0003] Therefore, the existing waste liquid neutralization treatment system needs to be further improved. Summary of the invention

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

[0005] In order to achieve the above object, the present invention adopts the following scheme:

[0006] A neutralization tank for waste liquid treatment, comprising a neutralization tank, a rotating assembly connected to the neutralization tank, a plurality of first stirring blades and a plurality of second stirring blades connected to the rotating assembly arranged in the neutralization tank, a rotating straight slot hole assembly capable of rotating at an angle arranged on each of the first stirring blades and the second stirring blades, a neutralization infusion hole assembly arranged in the rotating straight slot hole assembly, and an alkaline liquid delivery assembly and an acidic liquid delivery assembly arranged on the neutralization tank;

[0007] The first stirring blade and the second stirring blade drive the plurality of rotating straight slot hole components to rotate around the vertical axis direction of the rotating component;

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

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

[0010] The alkaline liquid delivery component is used to deliver the alkaline substance to the first stirring blade that is continuously rotating, and discharge it from the corresponding infusion hole component;

[0011] The acidic liquid delivery component is used to deliver the acidic substance to the continuously rotating second stirring blade, and discharge it from the corresponding infusion hole component;

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

[0013] Furthermore, the neutralization tank comprises a plurality of support rods, a tank body is arranged above the plurality of support rods, a waste liquid input end is arranged above the tank body, and a treated liquid output end is arranged below the tank body;

[0014] The rotating assembly comprises a stirring motor, and an output end of the stirring motor is connected to a stirring central shaft extending to the middle of the tank body.

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

[0016] The rotating straight slot hole assembly comprises a rotating circular plate, and an annular opening is respectively arranged on the first stirring blade and the second stirring blade. The rotating circular plate is rotatably installed in the annular opening, and a straight slot opening is arranged in the middle of the rotating circular plate.

[0017] Furthermore, the neutralization infusion hole assembly includes a plurality of infusion holes arranged on both sides of the straight groove opening, and the infusion holes penetrate from the inner wall of the straight groove opening to the outer wall of the rotating circular plate;

[0018] The alkaline liquid delivery component and the acidic liquid delivery component are respectively arranged at the upper position and the lower position of the tank body.

[0019] Further, the alkaline liquid delivery assembly includes an upper annular guide groove arranged on the upper surface of the inner wall of the tank body, an upper sealing rotating plate is rotatably arranged in the upper annular guide groove, a first connecting pipe is arranged on the upper edge of the first stirring blade, the first connecting pipe is connected to the upper annular guide groove, an annular water delivery groove is arranged in the annular opening, the annular water delivery groove is sealed by the rotating circular plate, the infusion hole is connected to a corresponding one of the annular water delivery grooves, and the first connecting pipe is connected to a corresponding one of the annular water delivery grooves;

[0020] An alkaline liquid input end assembly connected to the upper annular guide groove is arranged above the tank body.

[0021] Further, the acidic liquid delivery assembly includes a lower annular guide groove arranged on the lower surface of the inner wall of the tank body, a lower sealing rotating plate is rotatably arranged in the lower annular guide groove, a second connecting pipe is arranged at the lower edge of the second stirring blade, the second connecting pipe is connected to the lower annular guide groove, and the second connecting pipe is connected to a corresponding one of the annular water delivery grooves;

[0022] An acidic liquid input end assembly connected to the lower annular guide groove is arranged below the tank body.

[0023] Furthermore, the self-rotation transmission assembly includes an annular rack arranged on the neutralization tank, the annular rack is connected to the rotating assembly, a first bevel gear is arranged on the circumferential outer wall of the rotating circular plate, a transmission sleeve is arranged on the side walls of the first stirring blade and the second stirring blade, a transmission shaft is rotatably mounted on the transmission sleeve, a second bevel gear is arranged at the inner end of the transmission shaft, the second bevel gear is meshed with a corresponding one of the first bevel gears for transmission, a driven gear is arranged at the outer end of the transmission shaft, the driven gear is meshed with the annular rack for transmission.

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

[0025] A system for treating waste liquid, comprising a neutralization tank for treating waste liquid as described above, wherein a waste discharge end is arranged above the neutralization tank, and 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 replacement system, and one side of the replacement system is connected to a water purification system.

[0026] A method for treating waste liquid, using the above-mentioned system for treating waste liquid, comprises the following steps:

[0027] The method comprises the steps of: inputting waste liquid into the neutralization tank through the waste liquid input end, and detecting the pH value of the waste liquid;

[0028] Step 2: Calculate the amount of acidic or alkaline substance required for neutralization according to the stoichiometric relationship of the acid-base neutralization reaction of the waste liquid;

[0029] Step 3: Acidic substances and alkaline substances are discharged from the rotating straight slot hole components corresponding to the first stirring blade and the second stirring blade respectively, and the rotating straight slot hole components are used to pre-mix the passing waste liquid;

[0030] Step 3: the premixed waste liquid is discharged from the rear end of the rotating straight slot hole assembly, and the waste liquid is further mixed and stirred by the continuously rotating stirring blade structure;

[0031] Step 4: Real-time detection of changes in the pH value of the waste liquid, and appropriate addition of acidic or alkaline substances according to the changes to achieve the desired pH value.

[0032] In summary, the present invention has the following beneficial effects compared with the prior art:

[0033] The present invention solves the shortcomings of the existing waste liquid neutralization treatment system. Through the structural setting of the present invention, it has the following advantages: multiple stirring blades cover one side of the neutralization tank and rotate, so that the waste liquid can only pass through the narrow rotating straight slot hole component. The smaller hole can increase the pressure difference when the waste liquid contacts the acid and alkali to a certain extent, prompting the two to penetrate and diffuse each other faster, speeding up the mixing process, while maintaining the rotating straight slot hole component in a turnover state so that the waste liquid inside continues to pass through, and the rotating straight slot hole component itself also realizes the self-rotation state. During the self-rotation process, waste liquid at different angles can enter to ensure uniform stirring. When the liquid enters the rotating straight slot hole component, the acid and alkali substances are added from all sides of the rotating straight slot hole component, so that the acid and alkali substances are better integrated into the waste liquid for mixing. After the waste liquid and the acid and alkali substances pass through the rotating straight slot hole component, they are stirred again by the stirring blade component to further improve the mixing effect. Since the rotating straight slot hole component maintains rotation and turnover at different angles, the alkaline liquid conveying component and the acidic liquid conveying component are provided to maintain the conveying of the acid and alkali substances, ensuring that the rotating straight slot hole component can realize the output of the acid and alkali substances at different angles, greatly improving the mixing quality, improving the stirring quality and other advantages. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0037] Figure 4 It is one of the internal structure schematic diagrams of the present invention;

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

[0039] Figure 6 for Figure 5 A local enlarged view of point A;

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

[0041] Figure 8 for Figure 7 A partial enlarged view of point B;

[0042] Fig. 9 This is the fourth cross-sectional view of the present invention;

[0043] Fig.10 for Fig. 9 A partial enlarged view of point C;

[0044] Fig.11One of the exploded views of the present invention;

[0045] Fig.12 This is the second exploded view of the present invention. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figure 1-Figure 12 The present invention provides a neutralization tank for waste liquid treatment, comprising a neutralization tank 1, wherein a rotating assembly 2 is connected to the neutralization tank 1, wherein a plurality of first stirring blades 3 and a plurality of second stirring blades 4 connected to the rotating assembly 2 are arranged in the neutralization tank 1, wherein each of the first stirring blade 3 and the second stirring blade 4 is provided with a rotating straight slot hole assembly 5 capable of rotating at an angle, wherein a neutralization infusion hole assembly 6 is arranged in the rotating straight slot hole assembly 5, and an alkaline liquid delivery assembly 7 and an acidic liquid delivery assembly 8 are arranged on the neutralization tank 1;

[0048] The first stirring blade 3 and the second stirring blade 4 drive the plurality of rotating straight slot hole components 5 to rotate around the vertical axis direction of the rotating component 2;

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

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

[0051] The alkaline liquid delivery component 7 is used to deliver the alkaline substance to the first stirring blade 3 which is continuously rotating, and discharge it from the corresponding infusion hole component 6;

[0052] The acidic liquid delivery component 8 is used to deliver the acidic substance to the continuously rotating second stirring blade 4, and discharge it from the corresponding infusion hole component 6;

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

[0054] The neutralization tank 1 of the present invention comprises a plurality of support rods 101, 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 treated liquid output end 104 is arranged below the tank body 102;

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

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

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

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

[0059] During the process, the pH value in the neutralization tank 1 is detected by a detection device;

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

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

[0062] During the rotation of the first stirring blade 3 and the second stirring blade 4, the corresponding rotating straight slot hole component 5 will be driven to rotate, and the plurality of the first stirring blades 3 and the second stirring blades 4 divide the neutralization tank 1 into a plurality of spaces, and the waste liquid can only be moved from one space to another space through the rotating straight slot hole component 5;

[0063] When the waste liquid enters the position of the rotating straight slot hole component 5, the aperture becomes smaller. The smaller hole can increase the pressure difference when the waste liquid contacts the acid and alkali to a certain extent, prompting the two to penetrate and diffuse faster, thereby accelerating the mixing process.

[0064] When the waste liquid enters the position of the rotating straight slot hole component 5, the corresponding rotating straight slot hole component 5 can output the acidic substance or alkaline substance through the corresponding infusion hole component 6, and the acidic substance or alkaline substance is output from the infusion hole component 6 into the rotating straight slot hole component 5, just mixing with the passing waste liquid under pressure;

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

[0066] Since the rotating straight slot hole component 5 is in a continuous turnover and self-rotation state, it is necessary to keep the external alkaline substance or acidic substance in a conveying state through the alkaline liquid conveying component 7 or the acidic liquid conveying component 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 different positions of the waste liquid and improve the uniformity of the stirring.

[0068] The neutralization infusion hole assembly 6 of the present invention comprises a plurality of infusion holes 601 arranged on both sides of the straight slot opening 503, and the infusion holes 601 penetrate from the inner wall of the straight slot opening 503 to the outer wall of the rotating circular plate 501;

[0069] The alkaline liquid delivery assembly 7 and the acidic liquid delivery assembly 8 are respectively disposed at the upper position and the lower position of the tank body 102 .

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

[0071] An alkaline liquid input end assembly 705 connected to the upper annular guide groove 701 is provided above the tank body 102;

[0072] The waste liquid is input from the alkaline liquid input end component 705, and the alkaline liquid enters the fixed upper annular guide groove 701, and the upper sealed rotating plate 702 will rotate along with the first stirring blade 3, and the corresponding upper sealed rotating plate 702 and the first connecting pipes 703 will also rotate along the path direction of the upper annular guide groove 701, ensuring that the turnover range of the first connecting pipe 703 is always connected to the upper annular guide groove 701; the alkaline liquid enters the first A connecting pipe 703, and then enters the annular water delivery groove 704 in the first stirring blade 3, the inner side of the annular water delivery groove 704 is provided with a rotating circular plate 501, and the rotating circular plate 501 will rotate around the inner wall of the annular water delivery groove 704 and seal the annular water delivery groove 704, and the annular water delivery groove 704 is always connected with the multiple infusion holes 601 on the rotating circular plate 501, ensuring that the infusion holes 601 can be connected with the alkaline liquid input end component 705 at different angles;

[0073] The acidic liquid conveying assembly 8 of the present invention comprises a lower annular guide groove 801 arranged on the lower surface of the inner wall of the tank body 102, a lower sealing rotating plate 802 is rotatably arranged in the lower annular guide groove 801, a second connecting pipe 803 is arranged at 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 one of the annular water delivery grooves 704;

[0074] An acidic liquid input end assembly 804 connected to the lower annular guide groove 801 is provided below the tank body 102;

[0075] The acidic liquid is input from the acidic liquid delivery assembly 8 , in the same process as the alkaline liquid input, and is finally discharged from the corresponding infusion hole 601 .

[0076] The self-rotation transmission assembly 9 of the present invention comprises an annular rack 901 arranged on the neutralization tank 1, a first bevel gear 902 is arranged on the circumferential outer wall of the rotating circular plate 501, a transmission sleeve 903 is arranged on the side wall of the first stirring blade 3 and the second stirring blade 4, a transmission shaft 904 is rotatably mounted on the transmission sleeve 903, a second bevel gear 905 is arranged on the inner end of the transmission shaft 904, the second bevel gear 905 is meshed with a corresponding one of the first bevel gears 902 for transmission, a driven gear 906 is arranged on the outer end of the transmission shaft 904, and the driven gear 906 is meshed with the annular rack 901 for transmission;

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

[0078] When the first stirring blade 3 and the second stirring blade 4 rotate, the corresponding transmission sleeve 903, transmission shaft 904 and passive gear 906 will be driven to rotate accordingly. During the rotation of the passive gear 906, the passive gear 906 will always engage with the fixed annular rack 901. At this time, the annular rack 901 drives the passive gear 906 to rotate, and the passive 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, and 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 a plurality of U-shaped stirring rods 1001 extending from one side of the straight slot opening 503 to the other side.

[0080] The present invention also provides a waste liquid treatment system, comprising a waste liquid treatment neutralization tank 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 replacement system, and one side of the replacement 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 of the above embodiment, comprising the following steps:

[0082] Step 1: inputting waste liquid into the neutralization tank 1 through the waste liquid input end 103, and detecting the pH value of the waste liquid;

[0083] Step 2: Calculate the amount of acidic or alkaline substance required for neutralization according to the stoichiometric relationship of the acid-base neutralization reaction of the waste liquid;

[0084] Step 3: Acidic substances and alkaline substances are discharged from the rotating straight slot hole components 5 corresponding to the first stirring blade 3 and the second stirring blade 4 respectively, and the rotating straight slot hole components 5 are used to pre-mix the passing waste liquid;

[0085] Step 3: the premixed waste liquid is discharged from the rear end of the rotating straight slot hole assembly 5, and the waste liquid is further mixed and stirred by the continuously rotating stirring blade structure 10;

[0086] Step 4: Real-time detection of changes in the pH value of the waste liquid, and appropriate addition of acidic or alkaline substances according to the changes to achieve the desired pH value.

[0087] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached 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 to 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 slot hole assembly (5) capable of rotating at an angle; a neutralization infusion hole assembly (6) is provided in the rotating straight slot hole assembly (5); and 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 the plurality of rotating straight slot hole components (5) to rotate around the vertical axis direction of the rotating component (2); The rotating straight slot hole assembly (5) rotates along the longitudinal axis direction; A self-rotation transmission assembly (9) is provided between the neutralization tank (1) and the rotating straight slot hole assembly (5); The alkaline liquid delivery component (7) is used to deliver the alkaline substance to the first stirring blade (3) that is continuously rotating, and discharge it from the corresponding infusion hole component (6); The acidic liquid delivery component (8) is used to deliver the acidic substance to the continuously rotating second stirring blade (4), and discharge it from the corresponding infusion hole component (6); A stirring blade structure (10) is provided on one side of the rotating straight slot hole component (5).

2. A neutralization tank for waste liquid treatment according to claim 1, characterized in that: The neutralization tank (1) comprises a plurality of support rods (101), 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 treated liquid output end (104) is arranged below the tank body (102); The rotating assembly (2) comprises a stirring motor (201), and the output end of the stirring motor (201) is connected to a stirring central shaft (202) extending to the middle of the tank body (102).

3. A neutralization tank for waste liquid treatment according to claim 2, characterized in that: The first stirring blades (3) and the second stirring blades (4) are of the same number and are arranged alternately in a clockwise direction around the stirring center axis (202); The rotating straight slot hole assembly (5) comprises a rotating circular plate (501), on which the first stirring blade (3) and the second stirring blade (4) are respectively provided with an annular opening (502), the rotating circular plate (501) is rotatably mounted in the annular opening (502), and a straight slot opening (503) is provided in the middle of the rotating circular plate (501).

4. A neutralization tank for waste liquid treatment according to claim 3, characterized in that: The neutralization infusion hole assembly (6) comprises a plurality of infusion holes (601) arranged on both sides of the straight groove opening (503), and 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); The alkaline liquid conveying component (7) and the acidic liquid conveying component (8) are respectively arranged at an upper position and a lower position of the tank body (102).

5. A neutralization tank for waste liquid treatment according to claim 4, characterized in that: The alkaline liquid delivery component (7) comprises an upper annular guide groove (701) arranged on the upper surface of the inner wall of the tank body (102), an upper sealing rotating plate (702) is rotatably arranged in the upper annular guide groove (701), a first connecting pipe (703) is arranged on the upper edge of the first stirring blade (3), the first connecting pipe (703) is connected to the upper annular guide groove (701), an annular water delivery groove (704) is arranged in the annular opening (502), the annular water delivery groove (704) is sealed by the rotating circular plate (501), the infusion hole (601) is connected to a corresponding one of the annular water delivery grooves (704), and the first connecting pipe (703) is connected to a corresponding one of the annular water delivery grooves (704); An alkaline liquid input end assembly (705) connected to the upper annular guide groove (701) is arranged above the tank body (102).

6. A neutralization tank for waste liquid treatment according to claim 5, characterized in that: The acidic liquid conveying assembly (8) comprises a lower annular guide groove (801) arranged on the lower surface of the inner wall of the tank body (102), a lower sealing rotating plate (802) is rotatably arranged in the lower annular guide groove (801), a second connecting pipe (803) is arranged at 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 one of the annular water conveying grooves (704); An acidic liquid input end assembly (804) connected to the lower annular guide groove (801) is arranged below the tank body (102).

7. A neutralization tank for waste liquid treatment according to claim 6, characterized in that: The self-rotating transmission component (9) comprises an annular rack (901) arranged on the neutralization tank (1), the annular rack (901) being connected to the rotating component (2), a first bevel gear (902) being arranged on the circumferential outer wall of the rotating circular plate (501), a transmission shaft sleeve (903) being arranged on the side wall of each 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 arranged at the inner end of the transmission shaft (904), the second bevel gear (905) being meshed with a corresponding one of the first bevel gears (902) for transmission, a driven gear (906) being arranged at the outer end of the transmission shaft (904), the driven gear (906) being meshed with the annular rack (901) for transmission.

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

9. A system for treating waste liquid, characterized in that: A neutralization tank for waste liquid treatment as claimed in any one of claims 1 to 8, wherein a waste discharge end is arranged 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 replacement system, and one side of the replacement system is connected to a water purification system.

10. A method for treating waste liquid, characterized in that: A system for treating waste liquid according to claim 9 comprises the following steps: Step 1: inputting waste liquid into the neutralization tank (1) through the waste liquid input end (103), and detecting the pH value of the waste liquid; Step 2: Calculate the amount of acidic or alkaline substance required for neutralization according to the stoichiometric relationship of the acid-base neutralization reaction of the waste liquid; Step 3: Acidic substances and alkaline substances are discharged from the rotating straight slot hole components (5) corresponding to the first stirring blade (3) and the second stirring blade (4), respectively, and the rotating straight slot hole components (5) are used to perform pre-mixing treatment on the passing waste liquid; Step 3: the premixed waste liquid is discharged from the rear end of the rotating straight slot hole assembly (5), and the waste liquid is further mixed and stirred by the continuously rotating stirring blade structure (10); Step 4: Real-time detection of changes in the pH value of the waste liquid, and appropriate addition of acidic or alkaline substances according to the changes to achieve the desired pH value.

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