A treatment process for mine acid wastewater and its combined reactor

Abstract

The application discloses a treatment process and a combined reactor thereof for mine acid wastewater, and relates to the technical field of water treatment; and specifically comprises the following steps: oxidizing the mine acid wastewater through an aerobic reactor; adjusting the pH to 2.8 in a first neutralization reactor by using KOH, and further adjusting the pH to 4.5 in a second neutralization reactor by using KOH; introducing H2S into the wastewater into a pretreatment reactor for treatment, and continuously introducing the treated wastewater into two anaerobic reactors for reaction. The application adopts the "aerobic-anaerobic" combined reactor containing iron-oxidizing bacteria and sulfate-reducing bacteria to treat the mine acid wastewater, which can realize effective treatment of AMD on one hand, and selectively precipitate heavy metals on the other hand, so that valuable schuilingite and metal sulfides are obtained. The method realizes effective utilization of the economic value of the wastewater and the goal of environmental governance, and has good economic value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, and particularly relates to a treatment process for mine acid wastewater and a combined reactor thereof. BACKGROUND

[0002] Mine resources are precious wealth given by nature to mankind, but with the exploitation of various mineral resources, a large amount of mine acid wastewater (AMD) is produced, mainly including pit water, leaching water in waste rock yard, tailings heap wastewater and beneficiation wastewater, etc. AMD has the characteristics of low pH (generally between 2-4), high concentration of heavy metal ions (Pb, Zn, Cu, Cd, Mn, Al, Fe, As, etc.) and SO4 2- If AMD is discharged without treatment, it will not only cause waste of mine resources, but also cause serious acid pollution and heavy metal pollution to rivers, lakes, groundwater and soil around the mine. Therefore, AMD treatment is one of the urgent tasks of current environmental governance in China.

[0003] At present, AMD remediation technology is a research hotspot. Compared with the existing AMD remediation methods, the microbial remediation method of AMD can not only effectively reduce the formation of solid waste, but also effectively recover heavy metals. Through extensive research by domestic and foreign scholars, the formation mechanism and microbial ecology of AMD have been deeply understood. However, the basic research on AMD microbial remediation technology is relatively weak, which is not conducive to the treatment of AMD.

[0004] According to the different physiological and biochemical characteristics of microorganisms, the microbial method includes the method of using iron-oxidizing bacteria and sulfate-reducing bacteria to treat AMD. Iron-oxidizing bacteria are autotrophic microorganisms growing in mine acid wastewater, which can mediate the generation of secondary iron-containing minerals. The types of minerals formed in the AMD environment are diversified. Among them, in the case of pH 2.5-4.5 and less monovalent cations, a kind of schwertmannite with strong adsorption capacity for heavy metals can be formed in AMD; and when pH <2.5 and monovalent cations (Na + , K + , NH4 + , etc.) exist, schwertmannite will be converted to pyrite type minerals. These secondary minerals commonly exist in the form of a complex in an acidic environment. The sulfuric acid ferric mineral formed in AMD is a precipitation pool of toxic heavy metal ions in acidic water bodies. Sulfate-reducing bacteria (SRB) generally refer to a kind of anaerobic bacteria that can perform dissimilatory sulfate reduction, which provides organic matter as an electron donor. S 2-The heavy metal ions can be combined to form metal sulfide precipitate, the heavy metal ions in AMD are removed, and H + is consumed in the reaction process, and the pH of the effluent is improved. SUMMARY

[0005] The present application aims at solving the problems in the prior art and provides a treatment process for mine acid wastewater and a combined reactor thereof.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] A treatment process for mine acid wastewater comprises the following steps:

[0008] S1: The mine acid wastewater is oxidized by an aerobic reactor, and air is pumped into the aerobic reactor by an oxygen pump to promote the oxidation process;

[0009] S2: The completely oxidized mine acid wastewater is adjusted to a pH of 2.8 by KOH in a first neutralization reactor, and a uniform mixture is achieved by a stirrer, and the pH is further adjusted to 4.5 by KOH in a second neutralization reactor;

[0010] S3: The effluent after the above treatment is introduced into an anaerobic pretreatment reactor, and H2S is introduced;

[0011] S4: The filtrate after filtration is introduced into a first anaerobic reactor for anaerobic treatment, and the effluent is introduced into a second anaerobic reactor for anaerobic treatment.

[0012] Preferably, in the S1 step, enriched iron-oxidizing bacteria are added to the aerobic reactor, a modified 9K culture medium is used for the culture medium of the enriched iron-oxidizing bacteria, 1% high-grade FeS is used instead of FeSO4 as an energy substrate, high-pressure sterilization is performed at 121°C for 20 min, mine acid wastewater samples are inoculated in a super-clean bench at a ratio of 1:100, and the culture is shaken at room temperature of 25°C; 5% of the culture solution is taken each time and transferred to fresh culture solution, and the enriched iron-oxidizing bacteria are cultured by transfer; the enriched iron-oxidizing bacteria are collected by centrifugation and resuspended in 20 mL of distilled water; the collected iron-oxidizing bacteria are added to the aerobic reactor containing 5L of mine acid wastewater, sufficient oxygen is provided by the oxygen pump, and when the pH no longer decreases and the ferrous ions are completely oxidized, the oxidized mine acid wastewater enters the next reactor.

[0013] Further, in the S2 step, the fully oxidized mine acid wastewater is adjusted to pH of about 2.8 by 5 mol / L KOH in the first neutralization reactor, and after standing for 2 h, the supernatant is introduced into the second neutralization reactor, and adjusted to pH of about 4.5 by 5 mol / L KOH, and after standing for 1 h, the supernatant is filtered, and the filtrate is introduced into the next anaerobic pretreatment reactor.

[0014] On the basis of the foregoing scheme, in the S3 step, the H2S introduced into the anaerobic pretreatment reactor is derived from the excess H2S generated in the anaerobic reactor, and when no precipitate is generated, the gas introduction is stopped.

[0015] In a better scheme in the foregoing scheme, in the S4 step, the first anaerobic reactor is operated, and the effluent is discharged once every 4 days, and immediately the same amount of mine acid wastewater subjected to anaerobic pretreatment is introduced, and glycerol is added as a carbon source when the water is introduced, and COD / SO4 2- =2, K2HPO4 0.05 g / L, and yeast extract 0.2 g / L.

[0016] A combined reactor for mine acid wastewater, comprising an aerobic reactor, a neutralization reactor, a stirrer, an anaerobic pretreatment reactor, and an anaerobic processor.

[0017] Meanwhile, the neutralization reactor comprises a tank body and a tank cover fixed to the top of the tank body, one side of the bottom of the tank body is provided with a water inlet pipe, the other side of the water inlet pipe is connected with a water inlet pump, the other side of the water inlet pump is connected to the outlet of the aerobic reactor, one side of the top of the tank body is provided with an output pipe, the side wall of the output pipe is provided with a detection assembly, the top of the tank cover is connected with an opening valve through a neutralization pipe, the other side of the opening valve is connected with a neutralization pump, and the other side of the neutralization pump is connected to a lye tank.

[0018] As a preferred embodiment of the present application, the inner wall of the tank body is fixed with a spiral blade, the neutralization pipe comprises a fixed pipe fixed to the inner wall of the tank cover and a movable pipe rotatably connected to the fixed pipe, and the inner wall of the top opening of the movable pipe is fixed with a turbine fan, and the side wall of the movable pipe is provided with uniform liquid injection holes;

[0019] The spiral blade is opposite in rotation direction to the turbine fan in receiving water flow impact;

[0020] The detection assembly comprises two groups of glass electrodes and reference electrodes, and the two groups of glass electrodes and reference electrodes are fixedly embedded in the inner wall of the output pipe.

[0021] Meanwhile, the opening degree valve comprises a valve body and a ball core connected to the inner wall of the valve body through a valve rod, one side of the valve body is fixed with an outer shell, the inner wall of the outer shell is slidably connected with a sliding block, the outer wall of the valve rod is provided with a spiral groove, the inner wall of the sliding block is fixed with a movable limiting column movably and limitingly matched with the spiral groove, the outer wall of the sliding block and the inner wall of the outer shell are respectively fixed with one electromagnet, the two electromagnets are matched with each other and have the same magnetic pole on the opposite side, the end of the sliding block is fixed with a spring one, and the other end of the spring one is fixed to the outer wall of the valve body.

[0022] As a more optimal scheme of the present application: the power control assembly comprises an insulating shell and a magnetic conducting core fixed to the inner wall of the insulating shell, the two ends of the magnetic conducting core are respectively wound with a primary coil and a secondary coil, the outer wall of the insulating shell is fixed with an electromagnetic telescopic rod, the telescopic end of the electromagnetic telescopic rod is fixed with an electrode head, and the electrode head is in contact and electrically conductive cooperation with the side wall of the secondary coil;

[0023] The primary coil is connected to an outer wall alternating current power supply, the electrode head and the secondary coil are respectively connected to two terminal connectors of a water inlet pump, the electromagnetic telescopic rod is electrically connected to one group of glass electrodes and a reference electrode, and the electromagnet is electrically connected to another group of glass electrodes and the reference electrode.

[0024] The present application has the following beneficial effects:

[0025] 1. The present application uses an "aerobic-anaerobic" combined reactor containing iron-oxidizing bacteria and sulfate-reducing bacteria to treat mine acid wastewater, which can effectively treat AMD and selectively precipitate heavy metals to obtain valuable schuilingite and metal sulfides. The method not only realizes the economic value of effectively utilizing wastewater, but also realizes the goal of environmental governance.

[0026] 2. The present application has good AMD treatment stability, high heavy metal removal rate, can effectively reduce the formation of solid waste, effectively recover heavy metals, has economic value, and has the characteristics of low treatment cost, no secondary pollution and metal recovery.

[0027] 3. The small system for treating acid wastewater of the present application is composed of multiple reactors, which can effectively combine environmental protection, energy recovery and ecological benign cycle through a series of biological and chemical reactions, has good environmental and economic benefits, and is suitable for large-scale popularization and use.

[0028] 4. The present application sets up fixed pipes, turbine fans, movable pipes and spiral blades, so that the wastewater and alkali solution can present reverse relative motion when mixed, so that the contact between the wastewater and the alkali solution is more sufficient, the mixing efficiency is increased, and the neutralization effect is increased.

[0029] 5. In this invention, based on detection using glass electrodes and reference electrodes, the electromotive force generated by the detection using glass electrodes and reference electrodes is used as a drive to control the opening degree of the power valve of the water inlet pump, thereby achieving negative feedback-type "self-sensing and self-driving" adaptive adjustment, so that the alkaline feed rate and wastewater conveying speed are matched to each other, ensuring the neutralization effect. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a treatment process for acidic wastewater from mines proposed in this invention.

[0031] Figure 2 This is a schematic diagram of the overall main structure of a combined reactor for acidic wastewater from mines, as proposed in this invention.

[0032] Figure 3 This is a schematic cross-sectional view of the overall structure of a combined reactor for acidic wastewater from mines, as proposed in this invention.

[0033] Figure 4 This is a schematic diagram of the detection component structure of a combined reactor for acidic mine wastewater proposed in this invention.

[0034] Figure 5 This is a schematic diagram of the opening valve structure of a combined reactor for acidic wastewater from mines, as proposed in this invention.

[0035] Figure 6 This invention proposes a combined reactor for acidic mine wastewater. Figure 5 Enlarged structural diagram of section A;

[0036] Figure 7 This is a schematic diagram of the power control component structure of a combined reactor for acidic wastewater from mines, as proposed in this invention.

[0037] Figure 8 This is a schematic diagram of the circuit structure of a combined reactor for acidic wastewater from mines, as proposed in this invention.

[0038] In the diagram: 1. Tank body; 2. Tank cover; 3. Opening valve; 4. Neutralization pump; 5. Output pipe; 6. Detection component; 7. Inlet pipe; 8. Inlet pump; 9. Power control component; 10. Neutralization fitting; 11. Fixed pipe; 12. Turbine fan; 13. Movable pipe; 14. Spray hole; 15. Spiral blade; 16. Glass electrode; 17. Reference electrode; 18. Valve body; 19. Valve stem; 20. Ball core; 21. Electromagnet; 22. Outer shell; 23. Movable limit post; 24. Slider; 25. Spring 1; 26. Spiral groove; 27. Insulating shell; 28. Magnetic core; 29. ​​Primary coil; 30. Secondary coil; 31. Electrode head; 32. Electromagnetic telescopic rod. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be further described in detail below in combination with the specific embodiments.

[0040] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application. EMBODIMENT

[0041] A treatment process for mine acid wastewater, comprising the following steps:

[0042] S1: passing the mine acid wastewater through an aerobic reactor for oxidation, using an oxygen pump to pass in air to promote the oxidation process;

[0043] S2: adjusting the pH of the completely oxidized mine acid wastewater to 2.8 in the first neutralization reactor using KOH, achieving uniform mixing using a stirrer, and further adjusting the pH to 4.5 in the second neutralization reactor using KOH;

[0044] S3: passing the effluent after the above treatment into an anaerobic pretreatment reactor, and passing in H2S;

[0045] S4: passing the filtrate after filtration into the first anaerobic reactor for anaerobic treatment, and passing the effluent into the second anaerobic reactor for anaerobic treatment.

[0046] In the S1 step, enriched iron-oxidizing bacteria are added to the aerobic reactor, the culture medium for enriching the iron-oxidizing bacteria uses a modified 9K culture medium, 1% high-grade FeS is used instead of FeSO4 as an energy substrate, high-pressure sterilization is performed at 121°C for 20 min, the mine acid wastewater sample is inoculated in the super-clean bench at a ratio of 1:100, and the shaking culture is performed at room temperature 25°C; 5% of the culture solution is taken each time to transfer to fresh culture solution, and the transfer culture enriches the iron-oxidizing bacteria; the enriched iron-oxidizing bacteria are collected by centrifugation and resuspended in 20 mL of distilled water; the collected iron-oxidizing bacteria are added to the aerobic reactor containing 5 L of mine acid wastewater, sufficient oxygen is provided by the oxygen pump, and when the pH no longer decreases and the ferrous ions are completely oxidized, the oxidized mine acid wastewater enters the next reactor.

[0047] In the S2 step, the completely oxidized mine acid wastewater is adjusted to a pH of about 2.8 in the first neutralization reactor using 5 mol / L KOH, the supernatant enters the second neutralization reactor after standing for 2 h, the pH is adjusted to 4.5 using 5 mol / L KOH, the supernatant is filtered after standing for 1 h, and the filtrate enters the next anaerobic pretreatment reactor.

[0048] In the S3 step, the H2S introduced into the anaerobic pretreatment reactor is derived from the excess H2S produced in the anaerobic reactor, and the gas is stopped when no more precipitate is produced.

[0049] In the S4 step, the first anaerobic reactor is operated, and 600 mL of effluent is discharged every 4 days, immediately followed by the introduction of 600 mL of the mine acid wastewater subjected to anaerobic pretreatment, and glycerol is added as a carbon source at the time of water introduction, COD / SO4 2- = 2, K2HPO4 0.05 g / L, and yeast extract 0.2 g / L.

[0050] The second anaerobic reactor is operated, and 600 mL of effluent is discharged every 4 days, immediately followed by the introduction of 600 mL of the effluent of the second anaerobic reactor; and glycerol is added as a carbon source at the time of water introduction, COD / SO4 2- = 2, K2HPO4 0.05 g / L, and yeast extract 0.2 g / L. Embodiment

[0051] A combined reactor for mine acid wastewater is used to implement the treatment process for mine acid wastewater in Embodiment 1, which comprises an aerobic reactor, a neutralization reactor, a stirrer, an anaerobic pretreatment reactor, and an anaerobic processor.

[0052] The neutralization reactor comprises a tank body 1 and a tank cover 2 fixed to the top of the tank body 1, one side of the bottom of the tank body 1 is provided with a water inlet pipe 7, the other side of the water inlet pipe 7 is connected with a water inlet pump 8, the other side of the water inlet pump 8 is connected to the outlet of the aerobic reactor, one side of the top of the tank body 1 is provided with an output pipe 5, the side wall of the output pipe 5 is provided with a detection assembly 6, the top of the tank cover 2 is connected with an opening degree valve 3 through a neutralization pipe 10, the other side of the opening degree valve 3 is connected with a neutralization pump 4, the other side of the neutralization pump 4 is connected with a lye tank.

[0053] The water inlet pump 8 can pump the acid wastewater into the inside of the tank body 1, then the neutralization pump 4 can transport the lye in the lye tank to the inside of the tank body 1, the acid wastewater and the lye are mixed, then flow out through the output pipe 5, the detection assembly 6 can detect the pH of the wastewater flowing out of the output pipe 5, then control the opening degree of the opening degree valve 3 and the power of the water inlet pump 8, so that the pH reaches the neutralization standard.

[0054] The inner wall of the tank body 1 is fixed with a spiral blade 15, the neutralization pipe 10 comprises a fixed pipe 11 fixed to the inner wall of the tank cover 2 and a movable pipe 13 rotatably connected to the fixed pipe 11, the top opening of the movable pipe 13 is fixed with a turbine fan 12, and uniform liquid injection holes 14 are formed in the side wall of the movable pipe 13.

[0055] The spiral blade 15 is opposite to the rotation direction of the water flow received by the turbine fan 12.

[0056] When the wastewater enters from the bottom inlet pipe 7, it moves upward in a spiral path due to the guiding effect of the spiral blade 15, while the turbine fan 12 is driven to rotate by the flow force of the lye, so that the lye is sprayed in a rotating manner.

[0057] The device can make the wastewater and the lye present opposite rotating relative motion when mixed, so that the contact between the wastewater and the lye is more sufficient, the mixing efficiency is increased, and the neutralization effect is increased.

[0058] The detection assembly 6 includes two groups of glass electrodes 16 and reference electrodes 17, and the two groups of glass electrodes 16 and reference electrodes 17 are fixedly embedded on the inner wall of the output pipe 5.

[0059] When the glass electrode 16 contacts with hydrogen ions, the potential changes, so that the potential difference between the glass electrode 16 and the reference electrode 17 changes, and the hydrogen ion concentration can be detected by sensing the potential difference, so that the pH detection is realized.

[0060] In order to solve the problem of neutralization effect, as shown in Figures 5-7 The opening valve 3 includes a valve body 18 and a ball core 20 rotatably connected to the inner wall of the valve body 18 through a valve rod 19. When the ball core 20 rotates, the overlapping degree of the ball core 20 and the flow passage of the valve body 18 changes, so that the cross-sectional area of the flow passage changes, thereby changing the flow of the lye.

[0061] One side of the valve body 18 is fixedly connected with an outer shell 22, the inner wall of the outer shell 22 is slidably connected with a sliding block 24, the outer wall of the valve rod 19 is provided with a spiral groove 26, the inner wall of the sliding block 24 is fixedly connected with a movable limiting column 23 which movably and limitingly cooperates with the spiral groove 26, the outer wall of the sliding block 24 and the inner wall of the outer shell 22 are respectively fixedly connected with an electromagnet 21, the two electromagnets 21 are opposite to each other and have the same magnetic pole, the end of the sliding block 24 is fixedly connected with a spring 25, and the other end of the spring 25 is fixedly connected to the outer wall of the valve body 18.

[0062] When the electromagnet 21 is electrified, the electromagnet 21 can generate a magnetic field, thereby generating a magnetic repulsion force, the sliding block 24 is moved by the magnetic repulsion force, so that the movable limiting column 23 and the spiral groove 26 are relatively axially moved, thereby rotating the valve rod 19.

[0063] The power control assembly 9 comprises an insulating shell 27 and a magnetic core 28 fixed to the inner wall of the insulating shell 27, the two ends of the magnetic core 28 are respectively wound with a primary coil 29 and a secondary coil 30, the outer wall of the insulating shell 27 is fixed with an electromagnetic telescopic rod 32, the telescopic end of the electromagnetic telescopic rod 32 is fixed with an electrode head 31, and the electrode head 31 is in contact and electrically connected with the side wall of the secondary coil 30.

[0064] The primary coil 29 is connected to an external wall alternating current power supply, the electrode head 31 and the secondary coil 30 are respectively connected to two terminal connectors of the water inlet pump 8, the electromagnetic telescopic rod 32 is electrically connected to one of the glass electrodes 16 and the reference electrode 17, and the electromagnet 21 is electrically connected to the other glass electrode 16 and the reference electrode 17.

[0065] When the amount of lye is small and the neutralization is incomplete, the wastewater in the output pipe 5 is still acidic, and the concentration of hydrogen ions in it is relatively high, so that the potential difference between the glass electrode 16 and the reference electrode 17 increases, thereby increasing the current of the electromagnet 21, the magnetic field, the downward movement of the sliding block 24, the rotation of the ball core 20 driven by the neutralizing pipe 10, the degree of overlap between the ball core 20 and the flow passage of the valve body 18, thereby increasing the amount of lye intake, in addition, the electromagnetic telescopic rod 32 will also be extended by a large current, so that the electrode head 31 moves, thereby changing the matching position of the electrode head 31 and the secondary coil 30, reducing the number of turns of the secondary coil 30 connected to the circuit, according to the law of electromagnetic induction, the input power of the water inlet pump 8 is reduced, and the speed of the acid water delivery is reduced.

[0066] The device, on the basis of detection based on the glass electrode 16 and the reference electrode 17, further utilizes the electromotive force generated by the glass electrode 16 and the reference electrode 17 as a drive to control the opening of the power opening valve 3 of the water inlet pump 8, thereby realizing a negative feedback type "self-induction, self-driving" self-adaptive adjustment, so that the amount of lye feeding and the speed of wastewater delivery are mutually matched, and the neutralization effect is ensured.

[0067] In use, the water inlet pump 8 can draw the acidic wastewater into the inside of the tank 1, then the neutralization pump 4 can deliver the lye in the lye tank to the inside of the tank 1, the acidic wastewater and the lye are mixed, then flow out through the output pipe 5, the detection assembly 6 can detect the pH of the wastewater flowing out of the output pipe 5, then control the opening of the opening valve 3 and the power of the water inlet pump 8, so as to reach the neutralization standard pH, when the lye is insufficient to neutralize completely, the wastewater in the output pipe 5 is still acidic, the concentration of hydrogen ions in it is higher, so that the potential difference between the glass electrode 16 and the reference electrode 17 increases, on the one hand, the current of the electromagnet 21 increases, the magnetic field increases, the sliding block 24 moves down, the neutralization pipe 10 drives the ball core 20 to rotate, the overlapping degree of the ball core 20 and the flow passage of the valve body 18 is increased, so that the lye intake is increased, on the other hand, the electromagnetic telescopic rod 32 will also be stretched out under the large current, so that the electrode head 31 moves, so that the matching position of the electrode head 31 and the secondary coil 30 is changed, the number of turns of the secondary coil 30 connected to the circuit is reduced, according to the law of electromagnetic induction, the input power of the water inlet pump 8 is reduced, and the speed of the acidic water delivery is reduced.

[0068] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A combined reactor for treating acidic mine wastewater, characterized in that, Includes aerobic reactors, neutralization reactors, stirrers, anaerobic pretreatment reactors, and anaerobic processors; The neutralization reactor includes a tank (1) and a tank cover (2) fixed to the top of the tank (1). A water inlet pipe (7) is provided on one side of the bottom of the tank (1), and a water inlet pump (8) is connected to the other side of the water inlet pipe (7). The other side of the water inlet pump (8) is connected to the outlet of the aerobic reactor. An output pipe (5) is provided on one side of the top of the tank (1), and a detection component (6) is provided on the side wall of the output pipe (5). An opening valve (3) is connected to the top of the tank cover (2) through a neutralization fitting (10). A neutralization pump (4) is connected to the other side of the opening valve (3), and the other side of the neutralization pump (4) is connected to the alkali tank. The inner wall of the tank (1) is fixed with a spiral blade (15). The neutralization pipe (10) includes a fixed pipe (11) fixed to the inner wall of the tank cover (2) and a movable pipe (13) rotatably connected to the fixed pipe (11). A turbine fan (12) is fixed to the inner wall of the top opening of the movable pipe (13). The side wall of the movable pipe (13) is provided with uniform spray holes (14). The spiral blades (15) cause the wastewater to rise in a spiral path, and the turbine fan (12) is driven by the flow force of the alkaline solution to rotate the active pipe (13), causing the alkaline solution to be sprayed out in a rotating manner. The direction of rotation of the helical blade (15) guiding the wastewater is opposite to the direction of rotation of the turbine fan (12) receiving the impact of the water flow; The detection component (6) includes two sets of glass electrodes (16) and a reference electrode (17), and both sets of glass electrodes (16) and the reference electrode (17) are fixedly embedded in the inner wall of the output tube (5); The opening valve (3) includes a valve body (18) and a ball core (20) rotatably connected to the inner wall of the valve body (18) via a valve stem (19); a shell (22) is fixed on one side of the valve body (18), and a slider (24) is slidably connected to the inner wall of the shell (22); a spiral groove (26) is opened on the outer wall of the valve stem (19); a movable limiting post (23) that is movable and limited in conjunction with the spiral groove (26) is fixed on the inner wall of the slider (24); an electromagnet (21) is fixed on the outer wall of the slider (24) and the inner wall of the shell (22); the two electromagnets (21) cooperate with each other and have the same magnetic pole on opposite sides; a spring (25) is fixed at the end of the slider (24); and the other end of the spring (25) is fixed to the outer wall of the valve body (18). The water pump (8) is equipped with a power control component (9), which includes an insulating shell (27) and a magnetic core (28) fixed to the inner wall of the insulating shell (27). The two ends of the magnetic core (28) are respectively wound with a primary coil (29) and a secondary coil (30). An electromagnetic telescopic rod (32) is fixed to the outer wall of the insulating shell (27). An electrode head (31) is fixed to the telescopic end of the electromagnetic telescopic rod (32). The electrode head (31) is in contact with and electrically connected to the side wall of the secondary coil (30). The primary coil (29) is connected to the AC power supply on the outer wall. The electrode head (31) and the secondary coil (30) are respectively connected to two terminals of the water pump (8). The electromagnetic telescopic rod (32) is electrically connected to one set of glass electrodes (16) and a reference electrode (17). The electromagnet (21) is electrically connected to another set of glass electrodes (16) and a reference electrode (17).

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