Oxygen control acidification bioleaching reactor

Abstract

The invention provides an oxygen control acidification bioleaching reactor, which belongs to the field of sludge treatment, and comprises an aerobic reactor and an oxygen control reactor, and the oxygen control reactor and the aerobic reactor are connected and communicated with each other; one end of the first circulating reflux device is connected with the bottom of the aerobic reactor, and the other end is connected with the water distribution tank group; one end of the second circulating reflux device is connected with the bottom of the oxygen control reactor, and the other end is connected with the water distribution tank group; the first circulating reflux device is communicated with the second circulating reflux device through a first pipeline, and the second circulating reflux device, the third circulating reflux device and the aerobic reactor are sequentially connected; the oxygen control reactor and the aerobic reactor are both communicated with the water distribution tank group; and an inclined plate precipitator is arranged in the oxygen control reactor. The invention aims to solve the problem of poor sludge treatment effect in the prior art. The method has the technical effects that heavy metals in the sludge are efficiently removed, and stink and germs are obviously eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, and in particular to an oxygen-controlled acidification bioleaching reactor. Background Art

[0002] Municipal sludge refers to the sludge generated during the operation and maintenance of urban facilities related to urban life and urban life activities. With the development of urbanization, the amount of urban sludge generated is increasing. It contains a large number of bacteria, viruses, parasites, heavy metals, etc., and must be properly treated before discharge to avoid environmental pollution.

[0003] At present, urban sludge is mainly disposed of in the following forms: first, the combination of deep dehydration and landfill cannot utilize oxygen, clean energy is difficult to utilize, and it is difficult to achieve low-carbon emissions; second, the combination of drying, incineration and ash landfill has the disadvantages of no energy output, cannot achieve low-carbon emissions, and has high requirements for tail gas treatment; third, the combination of aerobic fermentation and land utilization has the disadvantages of high energy consumption, high operating costs, and cannot recover biogas; fourth, the combination of anaerobic digestion and land utilization has high investment in anaerobic digestion equipment, low gas production, and long digestion reaction time. Summary of the invention

[0004] The present invention provides an oxygen-controlled acidification bioleaching reactor to solve the defect of poor sludge treatment effect in the prior art, achieve high-efficiency removal of heavy metals in sludge while reducing EPS and releasing capillary water; and significantly eliminate odor and pathogens.

[0005] The present invention provides an oxygen-controlled acidification bioleaching reactor, comprising an aerobic reactor, an oxygen-controlled reactor, a first circulation reflux device, a second circulation reflux device, a third circulation reflux device, an inclined plate precipitator and a water distribution tank group; The oxygen-controlling reactor and the aerobic reactor are connected and communicated with each other; One end of the first circulation reflux device is connected to the bottom of the aerobic reactor, and the other end of the first circulation reflux device is connected to the water distribution trough group, one end of the second circulation reflux device is connected to the bottom of the oxygen control reactor, and the other end of the first circulation reflux device is connected to the water distribution trough group; one side of the first circulation reflux device is connected to the second circulation reflux device through a first pipeline, the other side of the second circulation reflux device is connected to one end of the third circulation reflux device, and the other end of the third circulation reflux device is connected to the aerobic reactor; The side of the oxygen control reactor and the side of the aerobic reactor are both connected to the water distribution trough group, and the oxygen control reactor and the aerobic reactor are both connected to the water distribution trough group; An inclined plate precipitator is arranged in the oxygen-controlled reactor.

[0006] In addition, the oxygen-controlled acidification bioleaching reactor according to the present invention may also have the following additional technical features: In some embodiments of the present invention, the first circulation and recirculation device includes a first circulation and recirculation riser, a first pneumatic ejector, and a second pneumatic ejector; The first pneumatic ejector and the second pneumatic ejector are both connected to the lower end of the first circulation return riser and are connected to the first end of the first pipeline. The upper end of the first circulation return riser is connected to the water distribution trough group.

[0007] In some embodiments of the present invention, the first circulation reflux riser includes a first tube body and a second tube body, one end of the first tube body is connected to an end of the first pneumatic ejector away from the first pipeline, the other end of the first tube body bypasses one side of the aerobic reactor and is connected to the water distribution trough group, one end of the second tube body is connected to an end of the second pneumatic ejector away from the first pipeline, and the other end of the second tube body bypasses the other side of the aerobic reactor and is connected to the water distribution trough group.

[0008] In some embodiments of the present invention, the second circulation reflux device includes a second circulation reflux riser, a third pneumatic ejector and a fourth pneumatic ejector; the third pneumatic ejector and the fourth pneumatic ejector are both connected to the lower end of the second circulation reflux riser and the third pneumatic ejector, the fourth pneumatic ejector, the second end of the first pipeline and the third circulation reflux device are interconnected, and the upper end of the second circulation reflux riser is connected to the water distribution trough group.

[0009] In some embodiments of the present invention, the second circulation reflux riser includes a third tube body and a fourth tube body, one end of the third tube body is connected to one end of the third pneumatic ejector away from the first pipeline, the other end of the third tube body bypasses one side of the oxygen control reactor and is connected to the water distribution trough group, one end of the fourth tube body is connected to one end of the fourth pneumatic ejector away from the first pipeline, and the other end of the fourth tube body bypasses the other side of the oxygen control reactor and is connected to the water distribution trough group.

[0010] In some embodiments of the present invention, the third circulation reflux device includes a reflux trough, a pneumatic lift pipe, a fifth pneumatic ejector and an air distribution device, one end of the fifth pneumatic ejector is connected to the first pipeline, one end of the pneumatic lift pipe is connected to the other end of the fifth pneumatic ejector, one end of the reflux trough is connected to the other end of the pneumatic lift pipe, and the other end of the reflux trough is connected to the water inlet of the aerobic reactor; an air distribution device is arranged in the pneumatic lift pipe.

[0011] In some embodiments of the present invention, the water distribution trough group includes a first water distribution trough and a second water distribution trough, and the first water distribution trough and the second water distribution trough are respectively connected to the two sides of the oxygen control reactor, and the first water distribution trough and the second water distribution trough are respectively connected to the oxygen control reactor through a toothed weir, and the end of the first tube body facing away from the first pneumatic ejector is connected to the first water distribution trough, and the end of the second tube body facing away from the second pneumatic ejector is connected to the second water distribution trough.

[0012] In some embodiments of the present invention, the water distribution trough group also includes a third water distribution trough and a fourth water distribution trough, the water distribution trough group includes the third water distribution trough and the fourth water distribution trough, the third water distribution trough and the fourth water distribution trough are respectively connected to the two sides of the aerobic reactor, the third water distribution trough and the fourth water distribution trough are respectively connected to the aerobic reactor through a toothed weir, the end of the third tube body facing away from the third pneumatic ejector is connected to the third water distribution trough, and the end of the fourth tube body facing away from the fourth pneumatic ejector is connected to the fourth water distribution trough.

[0013] In some embodiments of the present invention, a microporous aeration tube is further included, and the microporous aeration tube is installed on the aerobic reactor.

[0014] In some embodiments of the present invention, a compressed air duct is further included. The compressed air duct is installed in the middle of the first pipeline, and a compressed air inlet is provided at one end of the compressed air duct away from the first pipeline.

[0015] In summary, the present application includes the following beneficial technical effects: through the arrangement of the first circulation reflux device, the second circulation reflux device, the third circulation reflux device, the inclined plate sedimentation device, the water distribution tank group, the aerobic reactor and the oxygen control reactor, the sludge self-circulation in the aerobic reactor, the sludge self-circulation in the oxygen control reactor and the large circulation of the sludge after being treated in the aerobic reactor and the oxygen control reactor are realized, and the sludge is fully mixed with the aerobic acidophilic bacteria in the aerobic reactor and then enters the oxygen control reactor and is fully mixed with the anaerobic acidophilic bacteria in the oxygen control reactor to achieve the sludge. While removing heavy metals efficiently, EPS is reduced and capillary water is released; odors and pathogens are significantly eliminated; in addition, this reactor does not require the addition of any chemical flocculants to achieve the goal of deep dehydration, and can reduce the volume and weight of sludge. The biological leaching of this reactor will not damage the organic matter and nutrients such as NP in the sludge. Since the sludge contains high organic matter, the composted sludge can be used for landscaping and used as nutrient soil; furthermore, the sludge that has not been dehydrated in the aerobic reactor can also enter the middle and rear to form a large cycle and enter the aerobic reactor for further treatment to ensure the treatment effect of the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A first cross-sectional view of an oxygen-controlled acidification bioleaching reactor according to some embodiments of the present invention is schematically shown.

[0017] Figure 2 A second cross-sectional view of a controlled oxygen acidification bioleaching reactor according to some embodiments of the present invention is schematically shown.

[0018] Figure 3 A first side view of a controlled oxygen acidification bioleaching reactor according to some embodiments of the present invention is schematically shown.

[0019] Figure 4 A second side view of a controlled oxygen acidification bioleaching reactor according to some embodiments of the present invention is schematically shown.

[0020] Figure 5 A third side view of a controlled oxygen acidification bioleaching reactor according to some embodiments of the present invention is schematically shown.

[0021] Figure 6 A bottom view of a controlled oxygen acidification bioleaching reactor according to some embodiments of the present invention is schematically shown.

[0022] Figure 7 The structure diagram schematically shows the connection of the first circulation reflux device, the second circulation reflux device and the third circulation reflux device of the oxygen-controlled acidification bioleaching reactor according to some embodiments of the present invention.

[0023] Figure 8 A first view of a structural diagram of a water distribution device of an oxygen-controlled acidification bioleaching reactor according to some embodiments of the present invention is schematically shown.

[0024] Fig. 9 A second view schematically illustrates a structural diagram of a water distribution device of an oxygen-controlled acidification bioleaching reactor according to some embodiments of the present invention.

[0025] Fig.10 The structural diagram of the inclined plate settler of the oxygen-controlled acidification bioleaching reactor according to some embodiments of the present invention is schematically shown.

[0026] Fig.11 The structure diagram of each pneumatic ejector of the oxygen-controlled acidification bioleaching reactor according to some embodiments of the present invention is schematically shown.

[0027] Reference numerals: 1. Aerobic reactor, 2. Oxygen control reactor, 3. Pneumatic lifting pipe, 4. Microporous aeration pipe, 5. Inclined plate sedimentation vessel, 6. First circulation reflux lifting pipe, 61. First pipe body, 62. Second pipe body, 7. Second circulation reflux lifting pipe, 71. Third pipe body, 72. Fourth pipe body, 8. Reflux trough, 9. First water distribution trough, 10. Second water distribution trough, 11. Third water distribution trough, 12. Fourth water distribution trough, 13. Water inlet, 14. Mud discharge pipe, 15. Compressed air inlet, 161. First pneumatic ejector, 1 62. Second pneumatic ejector, 171. Third pneumatic ejector, 172. Fourth pneumatic ejector, 18. Fifth pneumatic ejector, 19. First return well, 20. Second return well, 21. Air distribution device, 22. Compressed air duct, 23. Air outlet pipe, 24. Second air outlet pipe, 25. Air inlet main pipe, 26. Branch pipe, 28. Water collecting trough, 29. Water outlet pipe, 30. Water production flange, 32. Air inlet pipe, 33. Nozzle, 34. Liquid inlet, 35. Casing, 36. Flange, 38. First pipeline. DETAILED DESCRIPTION

[0028] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0029] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0030] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0031] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is flipped, then the element described as "below other elements or features" or "below other elements or features" will be subsequently oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be additionally oriented and rotated 90 degrees or in other directions and the spatial relative descriptors used in the text are interpreted accordingly.

[0032] like Figures 1 to 11 As shown, according to an embodiment of the first aspect of the present invention, an oxygen-controlled acidification bioleaching reactor is proposed, comprising an aerobic reactor 1, an oxygen-controlled reactor 2, a first circulation reflux device, a second circulation reflux device, a third circulation reflux device, an inclined plate precipitator 5 and a water distribution tank group; The oxygen-controlled reactor 2 and the aerobic reactor 1 are interconnected and communicated with each other; One end of the first circulation reflux device is connected to the bottom of the aerobic reactor 1, and the other end of the first circulation reflux device is connected to the water distribution tank group. One end of the second circulation reflux device is connected to the bottom of the oxygen control reactor 2, and the other end of the first circulation reflux device is connected to the water distribution tank group. One side of the first circulation reflux device is connected to the second circulation reflux device through a first pipeline 38, and the other side of the second circulation reflux device is connected to one end of the third circulation reflux device, and the other end of the third circulation reflux device is connected to the aerobic reactor 1. The side of the oxygen control reactor 2 and the side of the aerobic reactor 1 are both connected to the water distribution trough group, and the oxygen control reactor 2 and the aerobic reactor 1 are both connected to the water distribution trough group; An inclined plate precipitator 5 is arranged in the oxygen-controlled reactor 2 .

[0033] In the above embodiment, it should be noted that it also includes a mud discharge pipe 14 and a compressed air pipe 22. The compressed air pipe 22 is installed in the middle of one side of the first pipeline 38. The end of the compressed air pipe 22 away from the first pipeline 38 is provided with a compressed air inlet 15, and the bottom side of the third circulation reflux device is provided with a mud discharge pipe 14; a water inlet 13 is opened on one side of the aerobic reactor 1, and an air compressor is connected to the water inlet 13 through a pipeline. The other end of the third circulation reflux device is connected to the aerobic reactor 1 and communicated with the water inlet 13; aerobic acidophilic bacteria are arranged in the aerobic reactor 1; anaerobic acidophilic bacteria are arranged in the oxygen control reactor 2; the inclined plate precipitator 5 adopts an existing inclined plate precipitator, that is, an inclined plate sedimentation tank; the outlet pipe 29 of the inclined plate precipitator 5 passes through the oxygen control reactor 2 and is connected to the outside.

[0034] The working principle of this reactor is as follows: after the sludge to be treated enters the aerobic reactor 1 from the water inlet 13, the first circulation reflux device drives the sludge to circulate in the aerobic reactor 1 and fully mixes with the aerobic acidophilic bacteria in the aerobic reactor 1, and then enters the oxygen control reactor 2, and then passes through the second circulation reflux device to drive the sludge to circulate in the oxygen control reactor 2 and fully mixes with the anaerobic acidophilic bacteria in the oxygen control reactor 2, and then passes through the inclined plate sedimentation device 5 to separate the sludge from water. The separated clean water enters the water collection tank 28 for collection, and then passes through the outlet pipe 29 of the inclined plate sedimentation device 5 and is discharged to the subsequent treatment device through the water production flange 30. The separated concentrated sludge falls to the bottom of the oxygen control reactor 2 and then passes through the second circulation reflux device and the third circulation reflux device and is discharged to the outside. The sludge that is not fully separated and still contains a lot of water is pulled into the aerobic reactor 1 through the third circulation reflux device for further treatment.

[0035] The technical effect achieved by the above embodiment is: through the arrangement of the first circulation reflux device, the second circulation reflux device, the third circulation reflux device, the inclined plate sedimentation device 5, the water distribution tank group, the aerobic reactor 1 and the oxygen control reactor 2, the sludge self-circulation in the aerobic reactor 1, the sludge self-circulation in the oxygen control reactor 2 and the large circulation of the sludge after being treated by the aerobic reactor 1 and the oxygen control reactor 2 are realized, and the sludge is fully mixed with the aerobic acidophilic bacteria in the aerobic reactor 1 and then enters the oxygen control reactor 2 and is fully mixed with the anaerobic acidophilic bacteria in the oxygen control reactor 2 to achieve the sludge. While removing heavy metals from the sludge efficiently, EPS is reduced and capillary water is released; odors and pathogens are significantly eliminated; in addition, the reactor does not need to add any chemical flocculants to achieve the goal of deep dehydration, and can reduce the volume and weight of the sludge. The biological leaching of the reactor will not damage the nutrients such as organic matter and NP in the sludge. Since the sludge contains high organic matter, the composted sludge can be used for landscaping and used as nutrient soil; furthermore, the sludge that has not been dehydrated in the aerobic reactor 2 can also enter 3 to form a large cycle and enter the aerobic reactor 1 for further treatment to ensure the treatment effect of the sludge.

[0036] Optional, such as Figures 1 to 11 As shown, the first circulation reflux device includes a first circulation reflux riser 6, a first pneumatic ejector 161 and a second pneumatic ejector 162; The first pneumatic ejector 161 and the second pneumatic ejector 162 are both connected to the lower end of the first circulation return riser 6 and are both connected to the first end of the first pipeline 38, and the upper end of the first circulation return riser 6 is connected to the water distribution trough group.

[0037] The first circulation reflux riser 6 includes a first tube body 61 and a second tube body 62, one end of the first tube body 61 is connected to the end of the first pneumatic ejector 161 away from the first pipeline 38, the other end of the first tube body 61 bypasses one side of the aerobic reactor 1 and is connected to the water distribution trough group, one end of the second tube body 62 is connected to the end of the second pneumatic ejector 162 away from the first pipeline 38, and the other end of the second tube body 62 bypasses the other side of the aerobic reactor 1 and is connected to the water distribution trough group.

[0038] The second circulation return device includes a second circulation return riser 7, a third pneumatic ejector 171 and a fourth pneumatic ejector 172; the third pneumatic ejector 171 and the fourth pneumatic ejector 172 are connected to the lower end of the second circulation return riser 7 and the third pneumatic ejector 171, the fourth pneumatic ejector 172, the second end of the first pipeline 38 and the third circulation return device are interconnected, and the upper end of the second circulation return riser 7 is connected to the water distribution trough group.

[0039] The second circulation reflux riser 7 includes a third tube body 71 and a fourth tube body 72, one end of the third tube body 71 is connected to one end of the third pneumatic ejector 171 away from the first pipeline 38, the other end of the third tube body 71 bypasses one side of the oxygen control reactor 2 and is connected to the water distribution trough group, one end of the fourth tube body 72 is connected to one end of the fourth pneumatic ejector 172 away from the first pipeline 38, and the other end of the fourth tube body 72 bypasses the other side of the oxygen control reactor 2 and is connected to the water distribution trough group.

[0040] The third circulation reflux device includes a reflux trough 8, a pneumatic lift pipe 3, a fifth pneumatic ejector 18 and an air distribution device 21, one end of the fifth pneumatic ejector 18 is connected to the first pipeline 38, one end of the pneumatic lift pipe 3 is connected to the other end of the fifth pneumatic ejector 18, one end of the reflux trough 8 is connected to the other end of the pneumatic lift pipe 3, and the other end of the reflux trough 8 is connected to the water inlet 13 of the aerobic reactor 1; an air distribution device 21 is arranged in the pneumatic lift pipe 3.

[0041] The water distribution trough group includes a first water distribution trough 9 and a second water distribution trough 10, and the first water distribution trough 9 and the second water distribution trough 10 are respectively connected to the two sides of the oxygen control reactor 2. The first water distribution trough 9 and the second water distribution trough 10 are respectively connected to the oxygen control reactor 2 through a toothed weir, and the end of the first tube body 61 away from the first pneumatic ejector 161 is connected to the first water distribution trough 9, and the end of the second tube body 62 away from the second pneumatic ejector 162 is connected to the second water distribution trough 10.

[0042] The water distribution trough group also includes a third water distribution trough 11 and a fourth water distribution trough 12. The water distribution trough group includes the third water distribution trough 11 and the fourth water distribution trough 12. The third water distribution trough 11 and the fourth water distribution trough 12 are respectively connected to the two sides of the aerobic reactor 1. The third water distribution trough 11 and the fourth water distribution trough 12 are respectively connected to the aerobic reactor 1 through a toothed weir. The end of the third tube body 71 away from the third pneumatic ejector 171 is connected to the third water distribution trough 11, and the end of the fourth tube body 72 away from the fourth pneumatic ejector 172 is connected to the fourth water distribution trough 12.

[0043] In the above optional embodiment, it should be noted that the air distribution device 21 includes an air inlet main pipe 25 and a plurality of branch pipes 26, one end of the air inlet main pipe 25 is connected to an end of the fifth pneumatic ejector 18 away from the first pipeline 38, and a plurality of branch blocks 26 are connected to the air inlet main pipe 25 at intervals, and the air inlet main pipe 25 and the plurality of branch pipes 26 are arranged in the pneumatic lifting pipe 3.

[0044] The bottom of the aerobic reactor 1 is a first reflux well 19 in a prism shape, and the first pneumatic ejector 161 and the second pneumatic ejector 162 are both located in the first reflux well 19 .

[0045] The bottom of the oxygen-controlled reactor 2 is a second reflux well 20 in a prism shape, and the third pneumatic ejector 171 and the fourth pneumatic ejector 172 are both located in the second reflux well 20 .

[0046] It also includes an air outlet pipe 23 , and the air inlet main pipe 25 is connected to the fifth pneumatic ejector 18 through the air outlet pipe 23 .

[0047] The first pneumatic ejector 161, the second pneumatic ejector 162, the third pneumatic ejector 171, the fourth pneumatic ejector 172 and the fifth pneumatic ejector 18 all include an air inlet pipe 32, a nozzle 33, a liquid inlet 34, a sleeve 35 and a flange 36. One end of the sleeve 35 is connected to the air inlet pipe 32, the air inlet pipe 32 is connected to the nozzle 33, the sleeve 35 is provided with a liquid inlet 34, and the sleeve 35 is provided with a flange 36.

[0048] The working principle of the reactor is as follows: after the sludge to be treated enters the aerobic reactor 1 from the water inlet 13, the air compressor is started to fill the first pneumatic ejector 161, the second pneumatic ejector 162, the third pneumatic ejector 171, the fourth pneumatic ejector 172 and the fifth pneumatic ejector 18 with compressed air. The sludge is driven to circulate in the aerobic reactor 1 and is fully mixed with the aerobic acidophilic bacteria in the aerobic reactor 1 and then enters the oxygen-controlled reactor 2. The sludge is driven to circulate in the oxygen-controlled reactor 2 and is fully mixed with the anaerobic acidophilic bacteria in the oxygen-controlled reactor 2 by the combined action of the compressed air, the third pneumatic ejector 171 and the fourth pneumatic ejector 172. After the acid bacteria are fully mixed, the sludge is separated from the water by the inclined plate settler 5. The separated clean water enters the water collecting tank 28 for collection and is then discharged to the subsequent treatment device through the outlet pipe 29 of the inclined plate settler 5 and the water production flange 30. The sludge precipitated by the inclined plate settler 5 enters the pneumatic lift pipe 3 after the fifth pneumatic ejector 18 and the outlet pipe 23. The concentrated sludge is discharged from the sludge discharge pipe 14 through the air inlet main pipe 25 and enters the sludge clarification tank or filter press for the next step of treatment. The sludge that has not formed concentrated sludge passes through the air inlet main pipe 25 and the reflux tank 8 through the water inlet 13 into the aerobic reactor 1 for further mixing and treatment due to the combined action of the fifth pneumatic ejector 18 and compressed air, and is further mixed and treated. This process is repeated until all the sludge to be treated is completely treated.

[0049] The beneficial effects of the above optional embodiments are: through the arrangement of the first pneumatic ejector 161, the second pneumatic ejector 162, the third pneumatic ejector 171, the fourth pneumatic ejector 172 and the fifth pneumatic ejector 18, cross-sectional piston flow is realized, thereby realizing leaching sludge treatment, preventing the formation of sludge sediment layer and sludge particles, while realizing the circulation of sludge in the aerobic reactor 1, the circulation of sludge in the oxygen control reactor 2 and the large-scale circulation treatment of sludge, thereby realizing the organic combination of aerobic and oxygen control processes, with a high self-circulation rate and uniform water flow, and the hydraulic conditions are suitable for the oxygen control acidification reaction to ensure the sludge treatment effect.

[0050] Optional, such as Figure 1 As shown, it also includes a microporous aeration tube 4, which is installed on the aerobic reactor 1.

[0051] In the above optional embodiments, it should be noted that the microporous aeration tube 4 is connected to the side wall of the aerobic reactor 1 by welding, screwing, or clamping.

[0052] The beneficial effects of the above optional embodiments are as follows: through the provision of the microporous aeration tube 4, the oxygen in the aerobic reactor 1 can be fully dissolved into the sludge, providing sufficient oxygen for the microorganisms in the activated sludge, promoting their growth and reproduction, and improving the degradation efficiency of the sludge pollutants.

[0053] Optional, such as Figure 6 and Figure 7 As shown, it also includes a compressed air duct 22, which is installed in the middle of the first pipeline 38, and a compressed air inlet 15 is provided at one end of the compressed air duct 22 away from the first pipeline 38.

[0054] The beneficial effect of the above optional embodiment is that the setting of the air compressor air duct 22 ensures that the compressed air can smoothly enter the first pneumatic ejector 161, the second pneumatic ejector 162, the third pneumatic ejector 171, the fourth pneumatic ejector 172 and the fifth pneumatic ejector 18.

[0055] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An oxygen-controlled acidification bioleaching reactor, characterized in that: It comprises an aerobic reactor (1), an oxygen control reactor (2), a first circulation reflux device, a second circulation reflux device, a third circulation reflux device, an inclined plate sedimentation device (5) and a water distribution tank group; The oxygen-controlled reactor (2) and the aerobic reactor (1) are interconnected and communicated with each other; One end of the first circulation reflux device is connected to the bottom of the aerobic reactor (1), and the other end of the first circulation reflux device is connected to the water distribution trough group; one end of the second circulation reflux device is connected to the bottom of the oxygen control reactor (2), and the other end of the first circulation reflux device is connected to the water distribution trough group; One side of the first circulation reflux device is connected to the second circulation reflux device via a first pipeline (38), the other side of the second circulation reflux device is connected to one end of the third circulation reflux device, and the other end of the third circulation reflux device is connected to the aerobic reactor (1); The side of the oxygen-control reactor (2) and the side of the aerobic reactor (1) are both connected to the water distribution trough group, and the oxygen-control reactor (2) and the aerobic reactor (1) are both in communication with the water distribution trough group; The inclined plate precipitator (5) is arranged in the oxygen-controlled reactor (2).

2. The oxygen-controlled acidification bioleaching reactor according to claim 1, characterized in that: The first circulation reflux device comprises a first circulation reflux riser (6), a first pneumatic ejector (161) and a second pneumatic ejector (162); The first pneumatic ejector (161) and the second pneumatic ejector (162) are both connected to the lower end of the first circulation return riser (6), and the first pneumatic ejector (161) and the second pneumatic ejector (162) are both in communication with the first end of the first pipeline (38), and the upper end of the first circulation return riser (6) is connected to the water distribution trough group.

3. The oxygen-controlled acidification bioleaching reactor according to claim 2, characterized in that: The first circulation reflux riser (6) comprises a first tube body (61) and a second tube body (62); one end of the first tube body (61) is connected to an end of the first pneumatic ejector (161) away from the first pipeline (38); the other end of the first tube body (61) bypasses one side of the aerobic reactor (1) and is connected to the water distribution trough group; one end of the second tube body (62) is connected to an end of the second pneumatic ejector (162) away from the first pipeline (38); the other end of the second tube body (62) bypasses the other side of the aerobic reactor (1) and is connected to the water distribution trough group.

4. The oxygen-controlled acidification bioleaching reactor according to claim 1, characterized in that: The second circulation return device comprises a second circulation return riser (7), a third pneumatic ejector (171) and a fourth pneumatic ejector (172); the third pneumatic ejector (171) and the fourth pneumatic ejector (172) are both connected to the lower end of the second circulation return riser (7), and the third pneumatic ejector (171), the fourth pneumatic ejector (172), the second end of the first pipeline (38) and the third circulation return device are interconnected; the upper end of the second circulation return riser (7) is connected to the water distribution trough group.

5. The oxygen-controlled acidification bioleaching reactor according to claim 4, characterized in that: The second circulation reflux riser (7) comprises a third tube body (71) and a fourth tube body (72); one end of the third tube body (71) is connected to an end of the third pneumatic ejector (171) away from the first pipeline (38); the other end of the third tube body (71) bypasses one side of the oxygen control reactor (2) and is connected to the water distribution trough group; one end of the fourth tube body (72) is connected to an end of the fourth pneumatic ejector (172) away from the first pipeline (38); the other end of the fourth tube body (72) bypasses the other side of the oxygen control reactor (2) and is connected to the water distribution trough group.

6. The oxygen-controlled acidification bioleaching reactor according to claim 1, characterized in that: The third circulation reflux device comprises a reflux trough (8), a pneumatic lift pipe (3), a fifth pneumatic ejector (18) and an air distribution device (21); one end of the fifth pneumatic ejector (18) is connected to the first pipeline (38); one end of the pneumatic lift pipe (3) is connected to the other end of the fifth pneumatic ejector (18); one end of the reflux trough (8) is connected to the other end of the pneumatic lift pipe (3); the other end of the reflux trough (8) is communicated with the water inlet (13) of the aerobic reactor (1); and the air distribution device (21) is arranged in the pneumatic lift pipe (3).

7. The oxygen-controlled acidification bioleaching reactor according to claim 3, characterized in that: The water distribution trough group comprises a first water distribution trough (9) and a second water distribution trough (10); the first water distribution trough (9) and the second water distribution trough (10) are respectively connected to the two sides of the oxygen control reactor (2); the first water distribution trough (9) and the second water distribution trough (10) are respectively connected to the oxygen control reactor (2) via a toothed weir; one end of the first tube body (61) facing away from the first wind-driven ejector (161) is connected to the first water distribution trough (9); and one end of the second tube body (62) facing away from the second wind-driven ejector (162) is connected to the second water distribution trough (10).

8. The oxygen-controlled acidification bioleaching reactor according to claim 5, characterized in that: The water distribution trough group further comprises a third water distribution trough (11) and a fourth water distribution trough (12). The water distribution trough group comprises the third water distribution trough (11) and the fourth water distribution trough (12). The third water distribution trough (11) and the fourth water distribution trough (12) are respectively connected to the two sides of the aerobic reactor (1). The third water distribution trough (11) and the fourth water distribution trough (12) are respectively connected to the aerobic reactor (1) via a toothed weir. The end of the third pipe body (71) facing away from the third pneumatic ejector (171) is connected to the third water distribution trough (11), and the end of the fourth pipe body (72) facing away from the fourth pneumatic ejector (172) is connected to the fourth water distribution trough (12).

9. The oxygen-controlled acidification bioleaching reactor according to any one of claims 1 to 8, characterized in that: It also comprises a microporous aeration tube (4), wherein the microporous aeration tube (4) is installed on the aerobic reactor (1).

10. The oxygen-controlled acidification bioleaching reactor according to any one of claims 1 to 8, characterized in that: It also comprises a compressed air duct (22), the compressed air duct (22) being installed in the middle of the first pipeline (38), and a compressed air inlet (15) being provided at one end of the compressed air duct (22) facing away from the first pipeline (38).

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