Large-flow acidification reactor

Abstract

The utility model relates to the field of environmental protection equipment, and provides a high-flow acidification reactor which comprises a mixing device and a separating device, the mixing device comprises a first mixing tank, a second mixing tank and a third mixing tank, the first mixing tank is arranged in the second mixing tank, and the second mixing tank is arranged in the third mixing tank; the mixing device further comprises a water inlet pipe and a dosing pipe, the water inlet pipe and the dosing pipe are communicated with the first mixing tank, the water inlet pipe is suitable for introducing wastewater into the first mixing tank, the dosing pipe is suitable for introducing an acidifying agent into the first mixing tank, and the first mixing tank is suitable for mixing the wastewater and the acidifying agent to form a mixed solution; mixed liquid overflows from the first mixing tank to the second mixing tank and flows into the third mixing tank from the second mixing tank, and the third mixing tank is communicated with the separation device. According to the utility model, mixed liquid in the mixing tank is fully mixed, energy waste caused by mechanical stirring is avoided, and meanwhile, the acidification speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of stone environmental protection equipment, in particular to a large flow acid precipitation reactor. Background Art

[0002] A lot of high-concentration wastewater is often produced in the production process of petrochemical, papermaking, and pharmaceutical industries. COD (chemical oxygen demand) often reaches 100,000 to 200,000 mg / L, and the salt content is also tens of thousands. The pretreatment coagulation and sedimentation effect is poor, and conventional biochemical treatment cannot operate normally. Therefore, the acid precipitation treatment process is often used. Under acidic conditions, part of the high-concentration organic matter in the wastewater is precipitated in the form of oil, and part of the organic matter is precipitated and removed, and the clear liquid enters the next pretreatment system.

[0003] In the prior art, in order to facilitate the complete mixing of wastewater and acidifier, mechanical stirring is adopted, which consumes a lot of energy. In addition, acid addition and acid precipitation reaction are carried out in the same tank, and the acid precipitation speed is slow and the effect is poor, which is not suitable for large-flow wastewater treatment. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the related art. To this end, the utility model provides a large flow acid precipitation reactor, which can achieve full mixing of wastewater and acidifying agent and separate acid precipitation reaction, reduce energy consumption, and improve acid precipitation speed.

[0005] The utility model provides a large-flow acid precipitation reactor, comprising: a mixing device and a separation device; the mixing device comprises a first mixing tank, a second mixing tank and a third mixing tank, the first mixing tank is arranged inside the second mixing tank, and the second mixing tank is arranged inside the third mixing tank; the mixing device also comprises a water inlet pipe and a dosing pipe, the water inlet pipe and the dosing pipe are connected with the first mixing tank, the water inlet pipe is suitable for passing wastewater into the first mixing tank, the dosing pipe is suitable for passing acidulant into the first mixing tank, the first mixing tank is suitable for mixing wastewater and acidulant to form a mixed liquid, the mixed liquid overflows from the first mixing tank to the second mixing tank, and flows from the second mixing tank into the third mixing tank, and the third mixing tank is connected with the separation device.

[0006] According to a large-flow acid precipitation reactor provided by the utility model, the tops of the first mixing tank, the second mixing tank and the third mixing tank are flush, and a through hole is provided at the bottom of the second mixing tank, and the through hole connects the second mixing tank and the third mixing tank.

[0007] According to a large-flow acid precipitation reactor provided by the utility model, the side wall of the first mixing tank is higher than the side wall of the second mixing tank, and the side wall of the second mixing tank is higher than the third mixing tank.

[0008] According to a large-flow acid precipitation reactor provided by the utility model, a gate is provided between the third mixing tank and the separation device, and the gate is used to control the opening and closing of the separation device.

[0009] According to a large-flow acid precipitation reactor provided by the utility model, the separation device includes a reaction tank, a transmission mechanism and a scraper plate, the transmission mechanism is arranged inside the reaction tank, the lower end of the transmission mechanism is close to the bottom of the reaction tank, the upper end of the transmission mechanism is close to the top of the reaction tank, the transmission mechanism is fixedly connected to the scraper plate, the scraper plate is perpendicular to the bottom surface of the reaction tank, and the extension direction of the scraper plate is parallel to the inner side wall of the reaction tank and perpendicular to the movement direction of the transmission mechanism.

[0010] According to a large-flow acid precipitation reactor provided by the utility model, the separation device also includes a sleeve and an oil collecting pipe, the sleeve is fixedly arranged on the inner wall of the reaction tank and close to the end of the transmission mechanism, the oil collecting pipe is sleeved on the sleeve, and an oil collecting trough is opened on the top of the oil collecting pipe, and the oil collecting trough is used to receive the floating oil residue collected by the scraper.

[0011] According to a large-flow acid precipitation reactor provided by the utility model, the separation device also includes a sludge hopper, the sludge hopper is arranged at the bottom end of the reaction tank, and a sludge discharge valve is arranged at the bottom end of the sludge hopper.

[0012] According to a large-flow acid precipitation reactor provided by the utility model, the bottom surface of the reaction tank is inclined toward the direction of the sludge hopper so that the precipitated sludge can enter the interior of the sludge hopper.

[0013] According to a large flow acid precipitation reactor provided by the utility model, the separation device also includes a scum trough, which is arranged at the lower end of the oil collecting pipe, the scum trough is fixedly connected to the inner wall of the reaction tank, and a scum discharge port is arranged on one side of the scum trough.

[0014] According to a large flow acid precipitation reactor provided by the utility model, a scum baffle is arranged at one end of the scum tank, and the scum baffle is close to the water outlet of the reaction tank.

[0015] The above one or more technical solutions in the embodiments of the utility model have at least one of the following technical effects:

[0016] The utility model provides a large-flow acid precipitation reactor, which arranges a mixing device and a separation device. The mixed liquid enters the first mixing tank, the second mixing tank and the third mixing tank in sequence, and is fully mixed by a deflection method before entering the separation device for separation, thereby solving the problem of serious energy waste in mechanical stirring, achieving full mixing of the mixed liquid, avoiding energy waste, and improving the acid precipitation speed.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a top view of the large flow acid precipitation reactor provided by the utility model.

[0020] Figure 2 It is a cross-sectional view of the large flow acid precipitation reactor provided by the utility model along the AA direction.

[0021] Reference numerals:

[0022] 1. Mixing device; 11. First mixing tank; 12. Second mixing tank; 121. Through hole; 13. Third mixing tank; 14. Water inlet pipe; 15. Dosing pipe; 2. Separation device; 21. Transmission mechanism; 22. Slag scraper; 23. Oil collecting pipe; 231. Oil collecting tank; 24. Sludge hopper; 25. Reaction tank; 26. Scum tank; 27. Scum baffle; 28. Water inlet baffle; 29. ​​Water outlet weir plate; 3. Gate. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the utility model will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The following embodiments are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0024] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] The principle of acid precipitation reaction is that under acidic conditions, some substances will be converted from dissolved or colloidal states to suspended states, and then separated from the solution by flocculation precipitation, flotation and other methods. This method can effectively remove the lignin content in papermaking black liquor and refined cotton black liquor, remove or reduce some difficult-to-treat indicators in the wastewater, and remove some COD. The acid precipitation process is to add acid to adjust the pH (acidity), carry out acid precipitation reaction, and remove the precipitated light organic matter and precipitated sludge.

[0028] In the related art, the acid precipitation speed is slow, the energy consumption is high, and there is no reactor specifically used for the acid precipitation reaction for the treatment of large-flow wastewater, so the wastewater cannot be treated in time. In order to solve this problem, a mixing device and at least one separation device are set up, and the opening and closing of the connecting hole are controlled by a gate, thereby controlling the opening and closing of the separation device, thereby meeting the requirements for treating large-flow wastewater. Finally, the separation device removes the light organic matter (mainly oils and fats) and precipitated sludge (heavy organic matter) in the large-flow wastewater respectively.

[0029] Figure 1 It is a top view of the large flow acid precipitation reactor provided by the utility model.

[0030] Figure 2 It is a cross-sectional view of the large flow acid precipitation reactor provided by the utility model along the AA direction.

[0031] The utility model provides a large flow acid precipitation reactor, such as Figure 1 and Figure 2 As shown, the large-flow acid precipitation reactor includes: a mixing device 1 and a separation device 2; the mixing device 1 includes a first mixing tank 11, a second mixing tank 12 and a third mixing tank 13, the first mixing tank 11 is arranged inside the second mixing tank 12, and the second mixing tank 12 is arranged inside the third mixing tank 13; the mixing device 1 also includes a water inlet pipe 14 and a dosing pipe 15, the water inlet pipe 14 and the dosing pipe 15 are connected to the first mixing tank 11, the water inlet pipe 14 is suitable for passing wastewater into the first mixing tank 11, the dosing pipe 15 is suitable for passing acidulant into the first mixing tank 11, the first mixing tank 11 is suitable for mixing wastewater and acidulant to form a mixed liquid, the mixed liquid overflows from the first mixing tank 11 to the second mixing tank 12, and flows from the second mixing tank 12 to the third mixing tank 13, and the third mixing tank 13 is connected to the separation device 2.

[0032] In this embodiment, by setting up a mixing device 1 and at least one separation device 2, the mixed liquid overflows from the first mixing tank 11 to the second mixing tank 12, and flows from the second mixing tank into the third mixing tank 13. The mixed liquid is fully mixed by a deflection method and then enters the separation device 2 for separation, which solves the problem of serious energy waste in mechanical stirring, achieves sufficient mixing of the mixed liquid, avoids energy waste, and at the same time increases the acid precipitation rate.

[0033] According to some embodiments of the utility model, the water inlet pipe 14 and the dosing pipe 15 respectively pass the wastewater, the acidifier and the emulsifier into the first mixing tank 11. After mixing in the first mixing tank 11 for a period of time, the mixed liquid overflows into the second mixing tank 12 for mixing and then enters the third mixing tank 13 to form a uniformly mixed mixed liquid. The third mixing tank 13 is connected to the separation device 2, and the uniformly mixed mixed liquid enters the separation device 2 for acid precipitation reaction.

[0034] According to some embodiments of the present invention, the pH value of the mixed liquid after being fully mixed by the mixing device 1 is in the range of 3-4.

[0035] According to some preferred embodiments of the present invention, the time for the mixed liquid to pass through the mixing device 1 is 10 minutes.

[0036] According to some preferred embodiments of the present invention, the processing capacity of the mixing device 1 is not less than 50m 3 / h.

[0037] According to some embodiments of the utility model, by setting a water inlet pipe 14 and a dosing pipe 15, wastewater and acidulant and emulsifier are respectively introduced into the first mixing tank 11, and the flow rates of wastewater and acidulant and emulsifier can be respectively controlled to ensure the acidification effect.

[0038] According to some embodiments of the present invention, the acidulant is a 40% sulfuric acid solution.

[0039] According to a large flow acid precipitation reactor provided by the utility model, Figure 1~Figure 2 As shown, the tops of the first mixing pool 11 , the second mixing pool 12 and the third mixing pool 13 are flush with each other, and a through hole 121 is provided at the bottom of the second mixing pool 12 , and the through hole 121 connects the second mixing pool 12 and the third mixing pool 13 .

[0040] According to some embodiments of the utility model, the mixed liquid first enters the first mixing tank 11. After mixing in the first mixing tank 11, the water level rises to the top of the first mixing tank 11. Since the first mixing tank 11 is flush with the top of the second mixing tank 12, the mixed liquid overflows from the top of the first mixing tank 11 into the second mixing tank 12. A through hole 121 is provided at the bottom of the second mixing tank 12. The mixed liquid enters the third mixing tank 13 through the through hole 121. The mixed liquid is deflected inside the mixing device 1 to achieve sufficient mixing of the mixed liquid. The liquid level of the mixed liquid after sufficient mixing rises to the position of the connecting hole. The mixed liquid enters the separation device 2 through the connecting hole for acid precipitation reaction to separate the grease residue and sludge precipitation.

[0041] According to a large flow acid precipitation reactor provided by the utility model, Figure 1As shown, the side wall of the first mixing pool 11 is higher than the side wall of the second mixing pool 12 , and the side wall of the second mixing pool 12 is higher than the third mixing pool 13 .

[0042] In this embodiment, by setting the side walls of the first mixing pool 11 to be higher than the side walls of the second mixing pool 12, and the side walls of the second mixing pool 12 to be higher than the third mixing pool 13, the mixed liquid in the second mixing pool 12 is prevented from overflowing and flowing back into the first mixing pool 11, and the mixed liquid in the third mixing pool 13 is prevented from overflowing and flowing back into the second mixing pool 12.

[0043] According to some embodiments of the present invention, after the mixed liquid enters the first mixing tank 11 , the mixed liquid overflows from the top of the first mixing tank 11 into the second mixing tank 12 , and then overflows from the second mixing tank 12 into the third mixing tank 13 .

[0044] According to a large flow acid precipitation reactor provided by the utility model, Figure 1 and Figure 2 As shown, a gate 3 is provided between the third mixing tank and the separation device, and the gate 3 is used to control the opening and closing of the separation device.

[0045] In this embodiment, by providing a gate 3 at one end of the connecting hole, the opening and closing of the separation device 2 can be controlled to avoid waste of resources and improve the acid precipitation efficiency.

[0046] According to some embodiments of the present invention, when multiple separation devices 2 are provided, when the wastewater flow can be processed by one separation device 2, the gates 3 of other separation devices 2 can be closed and only one gate 3 can be opened.

[0047] According to a large flow acid precipitation reactor provided by the utility model, Figure 1 and Figure 2 As shown, the separation device 2 includes a reaction pool 25, a transmission mechanism 21 and a scraper plate 22. The transmission mechanism 21 is arranged inside the reaction pool 25, the lower end of the transmission mechanism 21 is close to the bottom of the reaction pool 25, and the upper end of the transmission mechanism 21 is close to the top of the reaction pool 25. The transmission mechanism 21 is fixedly connected to the scraper plate 22, the scraper plate 22 is perpendicular to the bottom surface of the reaction pool 25, and the extension direction of the scraper plate 22 is parallel to the inner wall of the reaction pool 25 and perpendicular to the movement direction of the transmission mechanism 21.

[0048] In this embodiment, the lower end of the transmission mechanism 21 is arranged close to the bottom of the reaction tank 25, and the upper end of the transmission mechanism 21 is arranged close to the top of the reaction tank 25, so that the grease residue and the precipitated sludge can be collected separately.

[0049] According to some embodiments of the utility model, since the body of the reaction tank 25 is long, a scraper plate 22 needs to be designed. When the scraper plate 22 moves to the bottom of the reaction tank 25 with the transmission mechanism 21, the scraper plate 22 collects the precipitated sludge at the bottom of the reaction tank 25 to the corner of the bottom of the reaction tank. When the scraper plate 22 moves to the top of the reaction tank 25 with the transmission mechanism 21, the scraper plate 22 collects the grease residue at the top of the reaction tank 25 to one side of the top of the reaction tank, so as to centrally treat the grease residue and the precipitated sludge separately.

[0050] According to some preferred embodiments of the present invention, the height of the scraper plate 22 is 150-200 mm.

[0051] According to some preferred embodiments of the present invention, the moving speed of the transmission mechanism 21 is 0.01 m / s.

[0052] According to a large flow acid precipitation reactor provided by the utility model, Figure 1 and Figure 2 As shown, the separation device 2 also includes a sleeve and an oil collecting pipe 23. The sleeve is fixedly arranged on the inner wall of the reaction tank 25 and is close to the end of the transmission mechanism 21. The oil collecting pipe 23 is sleeved on the sleeve. An oil collecting trough 231 is opened on the top of the oil collecting pipe 23. The oil collecting trough 231 is used to receive the floating oil residue collected by the scraper plate 22.

[0053] In this embodiment, by setting the oil collecting pipe 23 at a position close to the end of the transmission mechanism 21, the transmission mechanism 21 transports the floating oil residue collected by the scraper 22 to the oil collecting tank, and the floating oil residue enters the oil collecting pipe 23 through the oil collecting tank 231.

[0054] According to some preferred embodiments of the present invention, the oil collecting groove 231 is a groove opened upwardly by the oil collecting pipe 23 with an angle of 60°.

[0055] According to some preferred embodiments of the present invention, the oil collecting pipe 23 has a diameter of 100 mm.

[0056] According to some preferred embodiments of the utility model, the center of the oil collecting pipe 23 is flush with the liquid surface or slightly lower than the liquid surface by 5 mm.

[0057] According to a large flow acid precipitation reactor provided by the utility model, Figure 1 and Figure 2 As shown, the separation device 2 further includes a sludge hopper 24 , which is disposed at the bottom end of the reaction tank 25 , and a sludge discharge valve is disposed at the bottom end of the sludge hopper 24 .

[0058] In this embodiment, by arranging the sludge hopper 24 at the bottom of the reaction tank 25, it is helpful to collect the precipitated sludge produced by acid precipitation, so that the light organic matter and the precipitated sludge can be collected separately.

[0059] According to some preferred embodiments of the present invention, the inclination angle between the inclined surface of the sludge hopper 24 and the horizontal plane is 60°.

[0060] According to some preferred embodiments of the present invention, the volume of the sludge hopper 24 is 1 cubic meter.

[0061] According to a large flow acid precipitation reactor provided by the utility model, Figure 1 and Figure 2 As shown, the bottom end of the reaction tank 25 is inclined toward the sludge hopper 24 so that the settled sludge can enter the interior of the sludge hopper 24 .

[0062] In this embodiment, the bottom end of the reaction tank 25 is arranged to be inclined toward the sludge hopper 24, which is helpful for collecting the precipitated sludge.

[0063] According to some preferred embodiments of the present invention, the reaction pool 25 is 1-2.5 m deep, with a horizontal flow rate of 2-5 mm / s; the depth-to-width ratio is 0.3-0.5, and the length-to-width ratio is ≥4.

[0064] According to some preferred embodiments of the present invention, the inclination angle between the bottom surface of the reaction tank 25 and the horizontal plane is 10°.

[0065] According to a large flow acid precipitation reactor provided by the utility model, Figure 1 and Figure 2 As shown, the separation device 2 further includes a scum groove 26 , which is disposed at the lower end of the oil collecting pipe 23 , and the scum groove 26 is fixedly connected to the inner wall of the reaction tank 25 , and a scum discharge port is disposed on one side of the scum groove 26 .

[0066] In this embodiment, a slag trough 26 and a slag discharge port are provided to facilitate the discharge of slag.

[0067] According to some embodiments of the present invention, the scum groove 26 is used to collect the floating oil residue in the oil collecting pipe 23, and the floating oil residue is discharged through the scum discharge port.

[0068] According to a large flow acid precipitation reactor provided by the utility model, Figure 1 and Figure 2 As shown, a scum baffle 27 is provided at one end of the scum groove 26 , and the scum baffle 27 is close to the water outlet of the reaction tank 25 .

[0069] In this embodiment, a scum baffle 27 is provided to prevent scum from not being discharged in time and entering the water outlet tank.

[0070] According to a large flow acid precipitation reactor provided by the utility model, Figure 1 and Figure 2 As shown, moving rods and / or turbine rods are fixedly provided on both sides of the oil collecting pipe 23, which are suitable for driving the oil collecting pipe 23 to rotate.

[0071] In this embodiment, a lifting rod and / or a turbine rod are provided to drive the oil collecting pipe 23 to rotate, so as to pour the floating oil residue collected by the oil collecting pipe 23 into the floating oil tank 26 .

[0072] According to a large flow acid precipitation reactor provided by the utility model, Figure 1~Figure 2 As shown, the separation device 2 further includes an inlet baffle 28 and an outlet weir 29 . The inlet baffle 28 is arranged at one end of the reaction tank 25 close to the gate 3 , and the outlet weir 29 is arranged at one end of the reaction tank 25 away from the gate 3 .

[0073] According to some preferred embodiments of the utility model, the water inlet baffle 28 and the water outlet weir plate 29 are 0.1-0.15 m higher than the water surface in the pool.

[0074] According to some embodiments of the present invention, the submerged depth of the water inlet baffle 28 is not less than 0.25, and preferably, the submerged depth of the water inlet baffle 28 is 0.5-1.0 m.

[0075] According to some preferred embodiments of the present invention, the submerged depth of the outlet weir plate 29 is 0.3-0.4 m.

[0076] According to some preferred embodiments of the present invention, the distance between the water inlet baffle 28 and the connecting hole is 0.5-1.0 m.

[0077] According to some preferred embodiments of the present invention, the distance between the outlet weir plate 29 and the water outlet is 0.25-0.5 m.

[0078] Compared with the prior art, the high-flow acid precipitation reactor of the disclosed embodiment has the following technical effects:

[0079] (1) The system has simple equipment, high degree of automation, stable operation, and energy saving, and can be applied in the treatment of large-flow and high-concentration wastewater.

[0080] (2) After acid precipitation, sewage discharge can effectively reduce the difficulty of subsequent biochemical treatment, improve the biochemical operating environment, and effectively improve the effluent quality.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A large flow acid precipitation reactor, characterized in that: include: Mixing and separation devices; The mixing device comprises a first mixing pool, a second mixing pool and a third mixing pool, wherein the first mixing pool is arranged inside the second mixing pool, and the second mixing pool is arranged inside the third mixing pool; The mixing device also includes a water inlet pipe and a dosing pipe, which are connected to the first mixing tank. The first mixing tank is suitable for mixing wastewater and acidifier to form a mixed liquid. The mixed liquid overflows from the first mixing tank to the second mixing tank, and flows from the second mixing tank to the third mixing tank. The third mixing tank is connected to the separation device.

2. The high-flow acid precipitation reactor according to claim 1, characterized in that: The tops of the first mixing pool, the second mixing pool and the third mixing pool are flush with each other, and a through hole is provided at the bottom of the second mixing pool, and the through hole connects the second mixing pool and the third mixing pool.

3. The high-flow acid precipitation reactor according to claim 1, characterized in that: The side wall of the first mixing tank is higher than the side wall of the second mixing tank, and the side wall of the second mixing tank is higher than the third mixing tank.

4. The high-flow acid precipitation reactor according to claim 1, characterized in that: A gate is provided between the third mixing tank and the separation device, and the gate is used to control the opening and closing of the separation device.

5. The high-flow acid precipitation reactor according to claim 1, characterized in that: The separation device includes a reaction pool, a transmission mechanism and a scraper plate. The transmission mechanism is arranged inside the reaction pool, the lower end of the transmission mechanism is close to the bottom of the reaction pool, and the upper end of the transmission mechanism is close to the top of the reaction pool. The transmission mechanism is fixedly connected to the scraper plate, and the scraper plate is perpendicular to the bottom surface of the reaction pool. The extension direction of the scraper plate is parallel to the inner wall of the reaction pool and perpendicular to the movement direction of the transmission mechanism.

6. The high-flow acid precipitation reactor according to claim 5, characterized in that: The separation device also includes a sleeve and an oil collecting pipe. The sleeve is fixedly arranged on the inner wall of the reaction tank and is close to the end of the transmission mechanism. The oil collecting pipe is sleeved on the sleeve. An oil collecting trough is opened on the top of the oil collecting pipe. The oil collecting trough is used to receive the floating oil residue collected by the scraper.

7. The high-flow acid precipitation reactor according to claim 5, characterized in that: The separation device further comprises a sludge hopper, which is arranged at the bottom end of the reaction tank, and a sludge discharge valve is arranged at the bottom end of the sludge hopper.

8. The high-flow acid precipitation reactor according to claim 7, characterized in that: The bottom surface of the reaction tank is inclined toward the sludge hopper so that the settled sludge can enter the interior of the sludge hopper.

9. The high-flow acid precipitation reactor according to claim 6, characterized in that: The separation device further comprises a scum groove, which is arranged at the lower end of the oil collecting pipe, the scum groove is fixedly connected to the inner wall of the reaction tank, and a scum discharge port is arranged on one side of the scum groove.

10. The high-flow acid precipitation reactor according to claim 9, characterized in that: A scum baffle is provided at one end of the scum trough, and the scum baffle is close to the water outlet of the reaction tank.

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