A wastewater multi-stage disinfection and purification treatment device and treatment process

Abstract

The invention discloses a wastewater multi-stage disinfection and purification treatment device and a treatment process. The treatment device comprises a waste liquid tank, a liquid pump, a redox reaction tank, a neutralization reaction device, a mud pump and a rotary drum centrifuge. The waste liquid tank is connected with the redox reaction tank through the liquid pump, the output end of the redox reaction tank is connected with a pipeline of the neutralization reaction device, and the neutralization reaction device is connected with the rotary drum centrifuge through the mud pump. The treatment device is used for multi-stage disinfection and purification treatment of waste liquid. The waste liquid is pumped into the redox reaction tank through the liquid pump, and a redox reaction is carried out by adding a reducing agent, and pH is adjusted. After the adjustment is completed, the waste liquid is pumped into the neutralization reaction device again, and an alkali solution is added to carry out a neutralization reaction. Heavy metal ions in the waste liquid are automatically precipitated. After the precipitation is completed, the waste liquid is sent to the rotary drum centrifuge through the mud pump for solid-liquid separation, thereby completing the multi-stage purification treatment of the waste liquid.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a wastewater multi-stage disinfection and purification treatment device and a treatment process. Background Art

[0002] Purification treatment equipment is generally used for heavy metal ion treatment of heavy metal waste liquid. Through multi-stage disinfection and purification treatment, the treatment quality of heavy metal waste liquid can be improved.

[0003] At present, the main process in the purification of heavy metal waste liquid is the addition and precipitation of heavy metal ions, which is generally time-consuming. Among them, the neutralization reaction rate of waste liquid and alkali solution is slow, and alkali solution is generally directly added to waste liquid, and precipitation is carried out after a period of natural reaction. This easily leads to insufficient contact between alkali solution and waste liquid, which greatly prolongs the reaction time.

[0004] In addition, neutralization reaction and precipitation are generally carried out in two parts, which cannot be carried out simultaneously in the limited chamber of the reaction tank, thereby reducing the efficiency of the purification process. Summary of the invention

[0005] The object of the present invention is to provide a wastewater multi-stage disinfection and purification treatment device and treatment process to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A wastewater multi-stage disinfection and purification treatment device, the treatment device comprises a waste liquid tank, a liquid pump, a redox reaction tank, a neutralization reaction device, a mud pump and a rotary drum centrifuge, the waste liquid tank is connected to the redox reaction tank through the liquid pump, the output end of the redox reaction tank is connected to the neutralization reaction device pipeline, and the neutralization reaction device is connected to the rotary drum centrifuge through the mud pump.

[0008] This treatment device is used for multi-stage disinfection and purification treatment of waste liquid. The waste liquid can be heavy metal waste liquid, liquid waste acid or waste alkali, etc. The corresponding waste liquid is filled into a waste liquid tank for temporary storage, and the waste liquid is pumped into a redox reaction tank by a liquid pump. By adding a reducing agent, a redox reaction is carried out, and the pH is adjusted. After the adjustment is completed, the waste liquid is pumped into a neutralization reaction device again, and an alkali solution is added to carry out a neutralization reaction. The heavy metal ions in the waste liquid are automatically precipitated. After the sedimentation is completed, it is sent to a rotary drum centrifuge by a mud pump for solid-liquid separation to complete the multi-stage purification treatment of the waste liquid.

[0009] Furthermore, the neutralization reaction device includes a neutralization tank and a dosing component. The redox reaction tank and the neutralization tank are connected by a pipeline. The neutralization tank is provided with a neutralization chamber. The dosing component is placed in the neutralization chamber. The dosing component includes a guide seat, a venturi tube and an atomizing tube. The guide seat and the neutralization chamber are tightly connected. The venturi tube is placed in the middle of the guide seat. The venturi tube includes a convergent tube, a throat and a divergent tube connected in sequence. The atomizing tube is connected to the throat, and the atomizing tube is connected to the atomized alkali solution.

[0010] The neutralization tank provides a neutralization reaction space, and alkali solution is added through the dosing component. The waste liquid after the redox reaction is completed enters the neutralization tank, and alkali solution is added through the dosing component. When the waste liquid enters the neutralization chamber, the venturi tube is fixed by the guide seat, and the venturi tube is connected to the positive pressure gas source, and a low pressure state is formed in the throat. The atomized alkali solution is backflowed through the atomizing pipe. The atomized alkali solution is collected in the throat under the action of low pressure and sprayed out from the gradually expanding tube to generate bubbles. The bubbles float up along the waste liquid under the action of buoyancy. During the floating process, they continuously contact with the waste liquid to carry out a neutralization reaction.

[0011] Furthermore, the neutralization reaction device also includes a circulation component, which is located above the gradually expanding tube. The circulation component includes a mounting frame and a rotary motor. The rotary motor is tightly connected to the neutralization tank, and the output end of the rotary motor is inserted into the neutralization chamber. The output end of the rotary motor is tightly connected to the mounting frame. The rotation axis of the mounting frame coincides with the center line of the neutralization chamber. The mounting frame is provided with a rotary groove, and four stripping wheels are provided in the rotary groove. The stripping wheels are rotatably connected to the rotary groove. Drive chambers are respectively provided on both sides of the rotary groove. A drive motor is provided in the drive chamber. The four stripping wheels include two adjacent centrifugal groups. The output end of the drive motor is transmission-connected to the adjacent stripping wheels in the centrifugal group. The axes of the two stripping wheels in each centrifugal group are in a vertical state. The two stripping wheels in the centrifugal group are driven by bevel gears.

[0012] During peeling: the four peeling wheels rotate toward the tangent line vertically downward at the adjacent ends.

[0013] By setting a circulation component, the waste liquid in the neutralization chamber is circulated internally. When the bubbles with atomized alkali solution float up under the action of buoyancy, the stripping wheel is driven to rotate by the driving motor. During the rotation of the four stripping wheels, the middle position is the floating route for the bubbles. The four stripping wheels rotate downward at the proximal ends, and the stripping wheels and the bubbles are in friction contact and the bubbles are stripped in layers to increase the contact area between the atomized alkali solution and the waste liquid, and the neutralization reaction is gradually carried out. As the stripping wheels rotate, the reacting liquid is driven to flow toward the wall of the neutralization chamber. When it flows to the end, it flows downward along the wall, thereby driving the waste liquid in the neutralization chamber to circulate internally. The stroke after the reaction is the sedimentation stroke. The generated precipitate is automatically settled through intermediate reaction and edge sedimentation to improve the sedimentation efficiency.

[0014] Furthermore, a peeling surface is provided on the peeling wheel, and the roughness of the peeling surface is gradually increased along the rotation direction.

[0015] By setting a peeling surface, the bubbles are peeled off in layers to maximize the contact area between the alkali solution and the waste liquid and ensure the neutralization reaction rate.

[0016] Furthermore, a plurality of rotary grooves are arranged along the vertical direction.

[0017] By setting up several groups of rotary grooves, four stripping wheels are arranged in each layer of rotary grooves, so that the rising bubbles are stripped in layers to ensure the neutralization reaction rate.

[0018] Furthermore, the neutralization reaction device also includes an adjustment component, a plurality of transmission grooves are provided on the guide seat, the adjustment component includes a transmission plate, the transmission plate is placed in the transmission groove, the transmission plate and the transmission groove are rotatably connected, and the rotation axis of the transmission plate is located above the horizontal center line.

[0019] The sedimentation rate is detected by setting an adjustment component. The waste liquid is circulated internally so that it hits the transmission plate. The transmission plate is eccentrically set. The impact of the waste liquid will drive the transmission plate to rotate. As the number of settled particles in the waste liquid increases, the impact of the liquid per unit volume on the transmission plate increases, thereby driving the transmission plate to rotate at an increased angle.

[0020] Furthermore, a guide channel is provided on one side of the transmission groove, and the adjustment assembly also includes a pressure spring and an adjustment plate. The adjustment plate is "L"-shaped, and the adjustment plate and the transmission groove are slidably connected. A flow hole is provided on the adjustment plate, and one end of the adjustment plate passes through the guide channel. The overlapping area between the guide channel and the flow hole is the flow cross-section. The end of the adjustment plate away from the guide channel is abutted against the transmission groove through the pressure spring, and the lower end of the transmission plate extends into the inner groove of the adjustment plate, and the guide channel outlet is connected to the atomization pipe.

[0021] The lower end of the transmission plate is inserted into the inner groove of the adjustment plate. During the rotation, the adjustment plate will be driven to move toward the pressure spring to compress the pressure spring. During this process, the overlapping area of ​​the flow hole and the guide channel on the adjustment plate is reduced, that is, the flow cross-section is reduced. As the reaction proceeds, the amount of alkali solution added is automatically adjusted according to the real-time amount of precipitation generated to improve the deposition accuracy.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: after the waste liquid enters the neutralization chamber, the venturi tube is connected to the positive pressure gas source, and a low pressure state is formed in the throat, and the atomized alkali liquid is backflowed through the atomizing tube. Under the action of low pressure, the atomized alkali liquid converges into the throat, and is sprayed out from the gradually expanding tube, and bubbles are generated. The bubbles float up along the waste liquid under the action of buoyancy, and during the floating process, they are constantly in contact with the waste liquid to undergo a neutralization reaction; when the bubbles with atomized alkali liquid float up under the action of buoyancy, the stripping wheel is driven to rotate by a driving motor, and during the rotation of the four stripping wheels, the middle position is the floating route for the bubbles, and the four stripping wheels rotate downward at their proximal ends, the stripping wheel and the bubbles are in friction contact, and the bubbles are stripped in layers, thereby increasing the contact area between the atomized alkali liquid and the waste liquid, and gradually undergoing a neutralization reaction. As the stripping wheel rotates, The liquid that drives the reaction flows toward the wall of the neutralization chamber. When it flows to the end, it flows downward along the wall, thereby driving the waste liquid in the neutralization chamber to circulate internally. The stroke after the reaction is the sedimentation stroke. Through the intermediate reaction and edge sedimentation, the generated precipitate is automatically settled to improve the sedimentation efficiency; the impact of the waste liquid will drive the transmission plate to rotate. As the number of settled particles in the waste liquid increases, the impact of the liquid in the unit volume on the transmission plate increases, thereby driving the rotation angle of the transmission plate to increase; the lower end of the transmission plate is inserted into the inner groove of the adjustment plate. During the rotation, the adjustment plate will be driven to move toward the pressure spring to compress the pressure spring. In this process, the overlapping area of ​​the flow hole and the guide channel on the adjustment plate is reduced, that is, the flow cross-section is reduced. As the reaction proceeds, the amount of alkali solution added is automatically adjusted according to the real-time amount of precipitate generated to improve the deposition accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the neutralization reaction device of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the circulation component of the present invention;

[0027] Figure 4 It is a schematic diagram of the internal circulation power transmission structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the dosing component of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the regulating component of the present invention;

[0030] In the figure: 1-waste liquid tank, 2-liquid pump, 3-oxidation-reduction reaction tank, 4-neutralization reaction device, 41-neutralization tank, 411-neutralization chamber, 42-dosing component; 421-flow guide seat, 4211-transmission groove, 4212-flow guide channel, 422-Venturi tube, 423-atomization tube, 43-circulation component, 431-mounting frame, 4311-rotation groove, 4312-drive chamber, 432-peeling wheel, 4321-peeling surface, 433-drive motor, 434-rotation motor, 44-adjustment component, 441-transmission plate, 442-pressure spring, 443-adjustment plate, 5-mud pump, 6-drum centrifuge. DETAILED DESCRIPTION

[0031] 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.

[0032] The present invention provides a technical solution:

[0033] like Figure 1~Figure 2 As shown, a wastewater multi-stage disinfection and purification treatment device includes a waste liquid tank 1, a liquid pump 2, a redox reaction tank 3, a neutralization reaction device 4, a mud pump 5 and a rotary drum centrifuge 6. The waste liquid tank 1 is connected to the redox reaction tank 3 through the liquid pump 2, the output end of the redox reaction tank 3 is connected to the neutralization reaction device 4 through a pipeline, and the neutralization reaction device 4 is connected to the rotary drum centrifuge 6 through the mud pump 5.

[0034] The treatment device is used for multi-stage disinfection and purification treatment of waste liquid. The waste liquid can be heavy metal waste liquid, liquid waste acid or waste alkali, etc. The corresponding waste liquid is filled into the waste liquid tank 1 for temporary storage, and the waste liquid is pumped into the redox reaction tank 3 by the liquid pump 2. By adding a reducing agent, a redox reaction is carried out, and the pH is adjusted. After the adjustment is completed, the waste liquid is pumped into the neutralization reaction device 4 again, and an alkali solution is added to carry out a neutralization reaction. The heavy metal ions in the waste liquid are automatically precipitated. After the sedimentation is completed, it is sent to the rotary drum centrifuge 6 by the mud pump 5 for solid-liquid separation to complete the multi-stage purification treatment of the waste liquid.

[0035] like Figure 1~Figure 2As shown, the neutralization reaction device 4 includes a neutralization tank 41 and a dosing component 42, the redox reaction tank 3 and the neutralization tank 41 are connected by a pipeline, the neutralization tank 41 is provided with a neutralization chamber 411, the dosing component 42 is placed in the neutralization chamber 411, the dosing component 42 includes a guide seat 421, a venturi tube 422 and an atomizing tube 423, the guide seat 421 and the neutralization chamber 411 are tightly connected, the venturi tube 422 is placed in the middle of the guide seat 421, the venturi tube 422 includes a convergent tube, a throat and a divergent tube connected in sequence, the atomizing tube 423 is connected to the throat, and the atomizing tube 423 is connected to the atomized alkali solution.

[0036] The neutralization tank 41 provides a neutralization reaction space, and alkali solution is added through the dosing component 42. The waste liquid after the redox reaction is completed enters the neutralization tank 41, and alkali solution is added through the dosing component 42. When the waste liquid enters the neutralization chamber 411, the venturi tube 422 is fixed by the guide seat 421. The venturi tube 422 is connected to the positive pressure gas source, and a low pressure state is formed in the throat. The atomized alkali solution is backflowed through the atomizing tube 423. Under the action of low pressure, the atomized alkali solution is merged into the throat and sprayed out from the gradually expanding tube to generate bubbles. The bubbles float up along the waste liquid under the action of buoyancy. During the floating process, they continuously contact with the waste liquid to perform a neutralization reaction.

[0037] like Figure 2~Figure 4 As shown, the neutralization reaction device 4 also includes a circulation component 43, which is located above the gradually expanding tube. The circulation component 43 includes a mounting frame 431 and a rotary motor 434. The rotary motor 434 is tightly connected to the neutralization tank 41. The output end of the rotary motor 434 is inserted into the neutralization chamber 411. The output end of the rotary motor 434 is tightly connected to the mounting frame 431. The rotation axis of the mounting frame 431 coincides with the center line of the neutralization chamber 411. The mounting frame 431 is provided with a rotary groove 4311. The rotary groove 43 11 is provided with four stripping wheels 432, the stripping wheels 432 are rotatably connected to the rotary groove 4311, driving chambers 4312 are respectively provided on both sides of the rotary groove 4311, and a driving motor 433 is provided in the driving chamber 4312. The four stripping wheels 432 include two adjacent centrifugal groups, and the output end of the driving motor 433 is transmission-connected with the adjacent stripping wheels 432 in the centrifugal group, and the axes of the two stripping wheels 432 in each centrifugal group are in a vertical state, and the two stripping wheels 432 in the centrifugal group are driven by bevel gears;

[0038] During stripping: the four stripping wheels 432 rotate toward the tangent line at the adjacent ends vertically downward.

[0039] By setting up a circulation component 43, the waste liquid in the neutralization chamber 411 is circulated internally. When the bubbles with atomized alkali solution float up under the action of buoyancy, the stripping wheel 432 is driven to rotate by the driving motor 433. During the rotation of the four stripping wheels 432, the middle position is the floating route for the bubbles. The four stripping wheels 432 rotate downward at the proximal ends, and the stripping wheels 432 and the bubbles are in friction contact and the bubbles are stripped in layers to increase the contact area between the atomized alkali solution and the waste liquid, and the neutralization reaction is gradually carried out. As the stripping wheel 432 rotates, the reacting liquid is driven to flow toward the wall of the neutralization chamber 411. When it flows to the end, it flows downward along the wall, thereby driving the waste liquid in the neutralization chamber 411 to circulate internally. The stroke after the reaction is a sedimentation stroke. The generated precipitate is automatically settled by the intermediate reaction and edge sedimentation, thereby improving the sedimentation efficiency.

[0040] like Figure 4 As shown, a peeling surface 4321 is provided on the peeling wheel 432 , and the roughness of the peeling surface 4321 is gradually increased along the rotation direction.

[0041] By providing the stripping surface 4321, the bubbles are stripped in layers, the contact area between the alkali solution and the waste liquid is increased as much as possible, and the neutralization reaction rate is guaranteed.

[0042] like Figure 2 As shown, a plurality of rotary grooves 4311 are arranged along the vertical direction.

[0043] By setting up a plurality of groups of rotary grooves 4311 , four stripping wheels 432 are set in each layer of rotary grooves 4311 , so that the rising bubbles are stripped in layers to ensure the neutralization reaction rate.

[0044] like Figure 5~Figure 6 As shown, the neutralization reaction device 4 also includes an adjustment component 44, a plurality of transmission grooves 4211 are provided on the guide seat 421, the adjustment component 44 includes a transmission plate 441, the transmission plate 441 is placed in the transmission groove 4211, the transmission plate 441 and the transmission groove 4211 are rotatably connected, and the rotation axis of the transmission plate 441 is located on the upper side of the horizontal center line.

[0045] The sedimentation rate is detected by setting the adjustment component 44, and the waste liquid is circulated internally so that the waste liquid hits the transmission plate 441. The transmission plate 441 is eccentrically set, and the impact of the waste liquid drives the transmission plate 441 to rotate. As the number of settled particles in the waste liquid increases, the impact of the liquid in the unit volume on the transmission plate 441 increases, thereby driving the rotation angle of the transmission plate 441 to increase.

[0046] like Figure 6As shown, a guide channel 4212 is provided on one side of the transmission groove 4211, and the adjustment component 44 also includes a pressure spring 442 and an adjustment plate 443. The adjustment plate 443 is "L"-shaped, and the adjustment plate 443 and the transmission groove 4211 are slidably connected. A flow hole is provided on the adjustment plate 443, and one end of the adjustment plate 443 passes through the guide channel 4212. The overlapping area between the guide channel 4212 and the flow hole is the flow cross-section. The end of the adjustment plate 443 away from the guide channel 4212 is abutted against the transmission groove 4211 through the pressure spring 442, and the lower end of the transmission plate 441 extends into the inner groove of the adjustment plate 443, and the outlet of the guide channel 4212 is connected to the atomization pipe 423.

[0047] The lower end of the transmission plate 441 is inserted into the inner groove of the adjustment plate 443. During the rotation, the adjustment plate 443 is driven to move toward the pressure spring 442 to compress the pressure spring 442. During this process, the overlapping area of ​​the flow hole on the adjustment plate 443 and the guide channel 4212 is reduced, that is, the flow cross-section is reduced. As the reaction proceeds, the amount of alkali solution added is automatically adjusted according to the real-time amount of precipitate generated to improve the deposition accuracy.

[0048] A treatment process of a wastewater multi-stage disinfection and purification treatment device includes the following steps:

[0049] S100, the waste liquid tank 1 stores the corresponding waste liquids such as heavy metal waste liquid, liquid waste acid, and waste alkali, which are transported to the redox reaction tank 3 through the liquid pump 2;

[0050] S200, when performing the redox reaction, adding waste acid or waste alkali, monitoring by a pH meter, making the pH of the mixed waste liquid 3-4, and adding ferrous sulfate to reduce the hexavalent chromium ions to trivalent chromium ions with less toxicity, and controlling the redox endpoint according to the ORP value;

[0051] S300, the reduced heavy metal waste liquid is directly pumped to the neutralization reaction device, and alkali solution is added to precipitate the heavy metal ions. The treatment process can be assisted by PAM flocculant to facilitate solid-liquid separation;

[0052] S400, the neutralized liquid is pumped into the drum centrifuge 6 through the mud pump 5 for solid-liquid separation.

[0053] Step S300 is specifically as follows:

[0054] S301, the bottom of the venturi tube 422 is connected to a gas source, and the alkali solution is atomized so that the atomized alkali solution contacts the heavy metal waste liquid again, thereby increasing the contact area and improving the precipitation rate;

[0055] S302, during the rising process of the gas with the atomized alkali solution, it contacts with the waste liquid and undergoes a neutralization reaction, and the waste liquid is driven to flow toward the edge of the neutralization chamber 411 by the stripping wheel 432, thereby performing an internal circulation of the waste liquid. During the circulation process, the precipitate generated by the neutralization reaction is precipitated downward along the wall of the neutralization chamber 411;

[0056] S303, through internal circulation, the waste liquid impacts the transmission plate 441, as the precipitation is gradually generated, the density gradually increases, and the impact force on the transmission plate 441 gradually increases, thereby reducing the amount of atomized alkali solution added to avoid excessive addition of alkali solution and causing waste.

[0057] The working principle of the present invention is as follows: after the waste liquid enters the neutralization chamber 411, the venturi tube 422 is connected to the positive pressure gas source, and a low pressure state is formed in the throat, and the atomized alkali liquid is backflowed through the atomizing tube 423. Under the action of low pressure, the atomized alkali liquid converges into the throat and is sprayed out from the gradually expanding tube to generate bubbles. The bubbles float up along the waste liquid under the action of buoyancy. During the floating process, they continuously contact with the waste liquid to carry out a neutralization reaction. When the bubbles with the atomized alkali liquid float up under the action of buoyancy, the stripping wheel 432 is driven to rotate by the driving motor 433. During the rotation of the four stripping wheels 432, the middle position is the floating route for the bubbles. The four stripping wheels 432 rotate downward at the proximal ends, and the stripping wheel 432 is in friction contact with the bubbles, and the bubbles are stripped in layers, thereby increasing the contact area between the atomized alkali liquid and the waste liquid, and gradually carrying out a neutralization reaction. As the stripping wheel 432 rotates, the reacting liquid is driven to the neutralization chamber 41 1. The waste liquid flows along the wall surface. When it flows to the end, it flows downward along the wall surface, thereby driving the waste liquid in the neutralization chamber 411 to circulate internally. The stroke after the reaction is the sedimentation stroke. Through the intermediate reaction and edge sedimentation, the generated precipitation is automatically settled to improve the sedimentation efficiency. The impact of the waste liquid will drive the transmission plate 441 to rotate. As the sedimentation particles in the waste liquid increase, the impact of the liquid in the unit volume on the transmission plate 441 increases, thereby driving the rotation angle of the transmission plate 441 to increase. The lower end of the transmission plate 441 is inserted into the inner groove of the adjustment plate 443. During the rotation, the adjustment plate 443 will be driven to move toward the pressure spring 442 to compress the pressure spring 442. In this process, the overlapping area of ​​the flow hole on the adjustment plate 443 and the guide channel 4212 is reduced, that is, the flow cross section is reduced. As the reaction proceeds, the amount of alkali solution added is automatically adjusted according to the real-time generation amount of precipitation to improve the deposition accuracy.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wastewater multi-stage disinfection and purification treatment device, characterized in that: The treatment device comprises a waste liquid tank (1), a liquid pump (2), a redox reaction tank (3), a neutralization reaction device (4), a slurry pump (5) and a rotary drum centrifuge (6); the waste liquid tank (1) is connected to the redox reaction tank (3) via the liquid pump (2); the output end of the redox reaction tank (3) is connected to the neutralization reaction device (4) via a pipeline; and the neutralization reaction device (4) is connected to the rotary drum centrifuge (6) via the slurry pump (5); The neutralization reaction device (4) comprises a neutralization tank (41) and a dosing assembly (42); the redox reaction tank (3) and the neutralization tank (41) are connected by a pipeline; the neutralization tank (41) is provided with a neutralization chamber (411); the dosing assembly (42) is placed in the neutralization chamber (411); the dosing assembly (42) comprises a flow guide seat (421), a venturi tube (422) and an atomizing tube (423); the flow guide seat (421) and the neutralization chamber (411) are tightly connected; the venturi tube (422) is placed in the middle of the flow guide seat (421); the venturi tube (422) comprises a convergent tube, a throat tube and a divergent tube which are connected in sequence; the atomizing tube (423) is connected to the throat tube; and the atomizing tube (423) is connected to the atomized alkali solution; The neutralization reaction device (4) further comprises a circulation assembly (43), wherein the circulation assembly (43) is located above the gradually expanding tube, and the circulation assembly (43) comprises a mounting frame (431) and a rotary motor (434), wherein the rotary motor (434) is firmly connected to the neutralization tank (41), wherein the output end of the rotary motor (434) is inserted into the neutralization chamber (411), wherein the output end of the rotary motor (434) is firmly connected to the mounting frame (431), wherein the rotation axis of the mounting frame (431) coincides with the center line of the neutralization chamber (411), and wherein a rotary groove (4311) is provided on the mounting frame (431), wherein the rotary groove (4311) is provided with a plurality of rotating grooves (4311). 311) is provided with four stripping wheels (432), the stripping wheels (432) are rotatably connected to the rotary groove (4311), driving chambers (4312) are respectively provided on both sides of the rotary groove (4311), a driving motor (433) is provided in the driving chamber (4312), the four stripping wheels (432) include two adjacent centrifugal groups, the output end of the driving motor (433) is transmission-connected to the adjacent stripping wheels (432) in the centrifugal group, the axes of the two stripping wheels (432) in each centrifugal group are in a vertical state, and the two stripping wheels (432) in the centrifugal group are driven by bevel gears; During peeling: the four peeling wheels (432) rotate vertically downward along the tangent line at the adjacent ends.

2. A wastewater multi-stage disinfection and purification treatment device according to claim 1, characterized in that: The peeling wheel (432) is provided with a peeling surface (4321), and the roughness of the peeling surface (4321) is arranged to increase along the rotation direction.

3. A wastewater multi-stage disinfection and purification treatment device according to claim 2, characterized in that: A plurality of the rotary grooves (4311) are arranged along the vertical direction.

4. A wastewater multi-stage disinfection and purification treatment device according to claim 3, characterized in that: The neutralization reaction device (4) further comprises an adjustment component (44), the guide seat (421) being provided with a plurality of transmission grooves (4211), the adjustment component (44) comprising a transmission plate (441), the transmission plate (441) being disposed in the transmission grooves (4211), the transmission plate (441) being rotatably connected to the transmission grooves (4211), and the rotation axis of the transmission plate (441) being located above the horizontal center line.

5. A wastewater multi-stage disinfection and purification treatment device according to claim 4, characterized in that: A flow guide channel (4212) is provided on one side of the transmission groove (4211); the adjustment component (44) further comprises a pressure spring (442) and an adjustment plate (443); the adjustment plate (443) is in an "L" shape; the adjustment plate (443) and the transmission groove (4211) are slidably connected; a flow hole is provided on the adjustment plate (443); one end of the adjustment plate (443) passes through the flow guide channel (4212); the overlapping area between the flow guide channel (4212) and the flow hole is the flow cross section; the end of the adjustment plate (443) away from the flow guide channel (4212) is in contact with the transmission groove (4211) via the pressure spring (442); the lower end of the transmission plate (441) extends into the inner groove of the adjustment plate (443); and the outlet of the flow guide channel (4212) is in communication with the atomization pipe (423).

6. The treatment process of a wastewater multi-stage disinfection and purification treatment device according to claim 5 is characterized in that: The treatment process comprises the following steps: S100, supplying waste liquid, transferring the waste liquid to the redox reaction tank (3) through the liquid pump (2); S200, adjusting the amount of waste acid or waste alkali input by a pH meter to make the pH of the waste liquid 3-4, and adding ferrous sulfate solution; S300, pumping the reduced waste liquid into a neutralization reaction device (4), and adding alkali solution to precipitate heavy metal ions; S400, the liquid after the neutralization reaction is pumped into a rotary drum centrifuge (6) through a mud pump (5) for solid-liquid separation.

7. The treatment process of a wastewater multi-stage disinfection and purification treatment device according to claim 6 is characterized by: The step S300 is specifically as follows: S301, atomizing the alkali solution to increase the contact area with the waste liquid; S302, a neutralization reaction is performed in the middle of the neutralization chamber (411), and flocculation and sedimentation are performed in the outside; S303, detecting the sedimentation efficiency and automatically adjusting the amount of atomized alkali solution added.

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