Anaerobic reactor for co-processing sludge

Abstract

The anaerobic reactor comprises a tank body, a first reaction cavity, a lower-layer three-phase separator, a second reaction cavity, an upper-layer three-phase separator and a clear water cavity are sequentially arranged in the tank body from bottom to top, and a water inlet assembly and a reflecting cover located above the water inlet assembly are arranged on the lower portion of the first reaction cavity. A water inlet pipe communicated with the water inlet assembly is arranged at the lower part of the tank body; the water inlet assembly is provided with a plurality of water spraying openings spraying towards the reflecting cover; a gas-water separator is arranged at the top of the tank body, a gas outlet of the upper-layer three-phase separator and a gas outlet of the lower-layer three-phase separator are respectively communicated with the gas-water separator through ascending pipes, an exhaust pipe is arranged at the top of the gas-water separator, the bottom of the gas-water separator is communicated with a reflecting cover through a sinking pipe, and a magnetic stirring device is rotationally mounted on the sinking pipe; the side wall of the clear water cavity is connected with a water outlet pipe. According to the utility model, automatic stirring is carried out by utilizing rising hydraulic power, so that sludge and wastewater are uniformly mixed, and the anaerobic treatment effect is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of anaerobic treatment technology for organic wastewater, and in particular to an anaerobic reactor for the co-processing of sludge. Background Technology

[0002] Anaerobic biological treatment is suitable for treating high-concentration organic wastewater. It utilizes the metabolic characteristics of anaerobic microorganisms to generate methane gas with energy value by using the reduced organic matter as a hydrogen acceptor without the need for external energy.

[0003] Currently, the mainstream high-efficiency anaerobic biological treatment method is IC (internal circulation anaerobic reactor), which consists of two reaction chambers, an upper chamber and an lower chamber. Wastewater flows from bottom to top in the reactor, pollutants are adsorbed and degraded by bacteria, and the purified water flows out from the top of the reactor. However, due to the large height-to-diameter ratio of current anaerobic reactors, there is a dead water area in the bottom mixing zone, which leads to insufficient and uneven mixing of sludge and wastewater. This easily causes sludge to settle at the bottom and greatly reduces the anaerobic treatment efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an anaerobic reactor for the co-processing of sludge, which can automatically stir by the rising hydraulic pressure, promoting uniform mixing of sludge and wastewater, and effectively solving the problems mentioned in the background art.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An anaerobic reactor for co-processing sludge includes a tank. The tank's interior, from bottom to top, comprises a first reaction chamber, a lower three-phase separator, a second reaction chamber, an upper three-phase separator, and a clear water chamber. The lower part of the first reaction chamber has an inlet assembly and a reflector located above the inlet assembly. The lower part of the tank has an inlet pipe for installing an inlet pump, which is connected to the inlet assembly. The inlet assembly has several spray nozzles that spray water towards the reflector. The top of the tank has a gas-liquid separator. The gas outlets of the upper and lower three-phase separators are respectively connected to the gas-liquid separator via riser pipes. The top of the gas-liquid separator has an exhaust pipe for discharging biogas, and the bottom of the gas-liquid separator is connected to the reflector via a sinking pipe. A magnetic stirring device located above the reflector is rotatably mounted on the sinking pipe. The side wall of the clear water chamber is connected to an outlet pipe.

[0007] Furthermore, the water inlet assembly includes a first branch pipe arranged in a circle and a second branch pipe arranged in a straight line, with both ends of the second branch pipe connected to the first branch pipe respectively; the first branch pipe has multiple water spray nozzles on its inner and outer sides, and the water spray nozzles on the inner and outer sides of the first branch pipe are arranged in a circumferential array; the second branch pipe has water spray nozzles on both sides, and the opening directions of the water spray nozzles on both sides of the second branch pipe are opposite.

[0008] Furthermore, the lower part of the reflector is provided with a baffle located between the water inlet assembly and the submerged pipe, and the baffle is connected to the reflector by a fixing rod.

[0009] Furthermore, the baffles are arranged horizontally.

[0010] Furthermore, the reflector is a cone-shaped structure with its opening facing downwards.

[0011] Furthermore, the magnetic stirring device includes a limiting ring, a rotating ring, and a fixed ring arranged sequentially from bottom to top. The rotating ring has a shaft hole in the middle for nesting and installation with the sinking tube. The outer shaft sidewall of the rotating ring is provided with a plurality of stirring blades. The interior of the rotating ring is provided with a first magnetic ring. The limiting ring and the fixed ring are respectively fixedly connected to the sinking tube. The interior of the limiting ring and the interior of the fixed ring are respectively provided with a second magnetic ring that repels the magnetic force of the first magnetic ring.

[0012] Furthermore, the outer periphery of the limiting ring is provided with a lower guide shroud that is smaller at the bottom and larger at the top, and the outer periphery of the fixing ring is provided with an upper guide shroud that is smaller at the top and larger at the bottom.

[0013] Furthermore, the upper and lower air deflectors are conical metal covers.

[0014] Furthermore, the diameter of the end of the upper guide shield near the rotating ring and the diameter of the end of the lower guide shield near the rotating ring are both equal to the diameter of the rotating ring.

[0015] Furthermore, the second reaction chamber has a reflux outlet on its side wall, and the lower side wall of the first reaction chamber has a reflux inlet. A circulation pipe is connected between the reflux outlet and the reflux inlet, and the circulation pipe is connected to a circulation pump and a control valve.

[0016] Compared with the prior art, this utility model provides an anaerobic reactor for the co-processing of sludge, which has the following beneficial effects:

[0017] On the one hand, by setting a reflector above the water inlet assembly, the present invention can disperse the input wastewater downward and outward using the reflective effect of the reflector, thereby avoiding the formation of a stagnant water area in the lower part of the first reaction chamber.

[0018] On the other hand, by setting up a magnetic stirring device, this utility model can automatically stir by using the rising water force, promote the uniform mixing of sludge and wastewater, greatly improve the anaerobic treatment effect, and avoid sludge deposition at the bottom. Attached Figure Description

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 This is a schematic diagram showing the installation of the magnetic stirring device and reflector on the submerged pipe.

[0022] Figure 3 This is a schematic diagram of the water inlet assembly.

[0023] Reference numerals: 1. Tank; 11. First reaction chamber; 12. Second reaction chamber; 13. Clear water chamber; 14. Return outlet; 15. Return inlet; 2. Lower three-phase separator; 3. Upper three-phase separator; 4. Water inlet assembly; 41. Spray nozzle; 42. First branch pipe; 43. Second branch pipe; 5. Reflector; 51. Baffle; 52. Fixing rod; 6. Water inlet pipe; 61. Water inlet pump; 7. Gas-water separator; 71. Ascending pipe; 72. Exhaust pipe; 73. Submerged pipe; 8. Magnetic stirring device; 81. Limiting ring; 82. Rotating ring; 821. Shaft hole; 822. Stirring blade; 83. Fixing ring; 84. First magnetic ring; 85. Second magnetic ring; 86. Lower guide shroud; 87. Upper guide shroud; 9. Circulation pipe; 91. Circulation pump; 92. Control valve; 10. Water outlet pipe. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below through detailed embodiments and in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0025] Please refer to Figures 1-3This embodiment provides an anaerobic reactor for the co-processing of sludge, including a tank 1. The tank 1 has, from bottom to top, a first reaction chamber 11, a lower three-phase separator 2, a second reaction chamber 12, an upper three-phase separator 3, and a clear water chamber 13. The lower part of the first reaction chamber 11 has an inlet assembly 4 and a reflector 5 located above the inlet assembly 4. The lower part of the tank 1 has an inlet pipe 6 for installing an inlet pump 61, and the inlet pipe 6 is connected to the inlet assembly 4. The inlet assembly 4 has several sections facing the reflector. 5. A spray nozzle 41; the top of the tank 1 is provided with a gas-water separator 7, the gas outlet of the upper three-phase separator 3 and the gas outlet of the lower three-phase separator 2 are respectively connected to the gas-water separator 7 through a riser pipe 71, the top of the gas-water separator 7 is provided with an exhaust pipe 72 for discharging biogas, the bottom of the gas-water separator 7 is connected to the reflector 5 through a sinking pipe 73, and a magnetic stirring device 8 located above the reflector 5 is rotatably installed on the sinking pipe 73; the side wall of the clear water chamber 13 is connected to a water outlet pipe 10.

[0026] With the above structural design, on the one hand, the reflector installed above the inlet component can disperse the incoming wastewater downwards and outwards by reflecting the water, thus avoiding the formation of a stagnant water area in the lower part of the first reaction chamber; on the other hand, by installing a magnetic stirring device, the rising water force can be used for automatic stirring without external power, promoting uniform mixing of sludge and wastewater, greatly improving the anaerobic treatment effect, and preventing sludge from settling at the bottom.

[0027] In some specific implementation methods, such as Figure 3 As shown, the water inlet assembly 4 includes a first branch pipe 42 arranged in a circle and a second branch pipe 43 arranged in a straight line. Both ends of the second branch pipe 43 are connected to the first branch pipe 42. Multiple water spray nozzles 41 are provided on both the inner and outer sides of the first branch pipe 42, and these nozzles are arranged in a circumferential array. Water spray nozzles 41 are provided on both sides of the second branch pipe 43, and the opening directions of the nozzles 41 on both sides of the second branch pipe 43 are opposite. Thus, the distribution of water spray nozzles in both inner and outer rings ensures more uniform water distribution, avoids stagnant water zones, and allows for more even mixing of wastewater and sludge.

[0028] As an improved implementation method, refer to Figure 1 and Figure 2The lower part of the reflector 5 is provided with a baffle 51 located between the water inlet assembly 4 and the submerged pipe 73. The baffle 51 is connected to the reflector 5 via a fixing rod 52. In this way, on the one hand, the input wastewater can be prevented from directly entering the submerged pipe when it is sprayed out, and on the other hand, the baffle can be used to guide the water flowing back through the submerged pipe to the surrounding areas, promoting the re-mixing with wastewater and sludge.

[0029] As a preferred embodiment, such as Figure 2 As shown, the baffles 51 are arranged horizontally.

[0030] In some specific implementation methods, such as Figure 2 As shown, the reflector 5 is a cone-shaped structure with its opening facing downwards.

[0031] In some specific implementation methods, refer to Figure 1 and Figure 2 The magnetic stirring device 8 includes a limiting ring 81, a rotating ring 82, and a fixed ring 83 arranged sequentially from bottom to top. The rotating ring 82 has a shaft hole 821 in the middle for nesting with the submerged pipe 73. The outer shaft sidewall of the rotating ring 82 is provided with a plurality of stirring blades 822. A first magnetic ring 84 is provided inside the rotating ring 82. The limiting ring 81 and the fixed ring 83 are respectively fixedly connected to the submerged pipe 73. A second magnetic ring 85, which is magnetically repelled by the first magnetic ring 84, is provided inside the limiting ring 81 and the fixed ring 83, respectively. By adopting a stirring structure without external power, the rotating ring with stirring blades can be suspended between the fixed ring and the limiting ring through the magnetic repulsion, which greatly reduces the resistance during rotation and stirring. It can be automatically rotated by the rising water force, thereby promoting the uniform mixing of sludge and wastewater.

[0032] As an improved implementation method, refer to Figure 1 and Figure 2 The limiting ring 81 has a lower guide shroud 86 with a smaller bottom and a larger top on its outer periphery, and the fixing ring 83 has an upper guide shroud 87 with a smaller top and a larger bottom on its outer periphery. Preferably, the diameter of the end of the upper guide shroud 87 near the rotating ring 82 and the diameter of the end of the lower guide shroud 86 near the rotating ring 82 are both equal to the diameter of the rotating ring 82. This facilitates the upward flow of wastewater and prevents sludge from directly entering the shaft hole of the rotating ring during settling, greatly reducing the chance of blockage and jamming.

[0033] In some specific implementation methods, such as Figure 2 As shown, the upper air deflector 87 and the lower air deflector 86 are conical metal covers.

[0034] In some specific implementation methods, refer to Figure 1The second reaction chamber 12 has a reflux outlet 14 on its side wall, and the lower side wall of the first reaction chamber 11 has a reflux inlet 15. A circulation pipe 9 connects the reflux outlet 14 and the reflux inlet 15, and the circulation pipe 9 is connected to a circulation pump 91 and a control valve 92. By setting up the circulation pipe, the hydraulic retention time can be reduced through the suction force of the circulating flow, and the sludge in the second reaction chamber can be circulated to the bottom of the first reaction chamber, ensuring the activity of the sludge and greatly improving the anaerobic reaction efficiency.

[0035] It should be noted that the specific structures of the upper three-phase separator, the lower three-phase separator, and the gas-water separator are conventional technologies known to those skilled in the art, and therefore will not be described in detail here.

[0036] The above embodiments are merely illustrative of the concept and technical solution of this utility model, and are not intended to limit this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An anaerobic reactor for co-processing sludge, comprising a tank, wherein the interior of the tank is provided with, from bottom to top, a first reaction chamber, a lower three-phase separator, a second reaction chamber, an upper three-phase separator, and a clear water chamber, characterized in that, The lower part of the first reaction chamber is provided with a water inlet assembly and a reflector located above the water inlet assembly. The lower part of the tank is provided with a water inlet pipe for installing a water inlet pump. The water inlet pipe is connected to the water inlet assembly. The water inlet assembly has several spray nozzles that spray water toward the reflector. The top of the tank is provided with a gas-water separator. The gas outlets of the upper three-phase separator and the lower three-phase separator are respectively connected to the gas-water separator through riser pipes. The top of the gas-water separator is provided with an exhaust pipe for discharging biogas. The bottom of the gas-water separator is connected to the reflector through a sinking pipe. A magnetic stirring device located above the reflector is rotatably installed on the sinking pipe. The side wall of the clear water chamber is connected with a water outlet pipe.

2. The anaerobic reactor for co-processing sludge according to claim 1, characterized in that, The water inlet assembly includes a first branch pipe arranged in a circle and a second branch pipe arranged in a straight line. The two ends of the second branch pipe are respectively connected to the first branch pipe. The first branch pipe has multiple water spray nozzles on its inner and outer sides, and the water spray nozzles on the inner and outer sides of the first branch pipe are arranged in a circumferential array. The second branch pipe has water spray nozzles on both sides, and the opening directions of the water spray nozzles on both sides of the second branch pipe are opposite.

3. The anaerobic reactor for co-processing sludge according to claim 1, characterized in that, The lower part of the reflector is provided with a baffle located between the water inlet assembly and the submerged pipe, and the baffle is connected to the reflector by a fixing rod.

4. The anaerobic reactor for co-processing sludge according to claim 3, characterized in that, The baffles are arranged horizontally.

5. The anaerobic reactor for co-processing sludge according to claim 1, characterized in that, The reflector is a cone-shaped structure with its opening facing downwards.

6. The anaerobic reactor for co-processing sludge according to claim 1, characterized in that, The magnetic stirring device includes a limiting ring, a rotating ring, and a fixed ring arranged sequentially from bottom to top. The rotating ring has a shaft hole in the middle for nesting and installation with the sinking tube. The outer shaft sidewall of the rotating ring is provided with a plurality of stirring blades. The rotating ring is provided with a first magnetic ring inside. The limiting ring and the fixed ring are respectively fixedly connected to the sinking tube. The limiting ring and the fixed ring are respectively provided with a second magnetic ring that is magnetically repelled by the first magnetic ring.

7. The anaerobic reactor for co-processing sludge according to claim 6, characterized in that, The outer periphery of the limiting ring is provided with a lower guide shroud that is smaller at the bottom and larger at the top, and the outer periphery of the fixing ring is provided with an upper guide shroud that is smaller at the top and larger at the bottom.

8. The anaerobic reactor for co-processing sludge according to claim 7, characterized in that, The upper and lower air deflectors are conical metal covers.

9. The anaerobic reactor for co-processing sludge according to claim 8, characterized in that, The diameter of the end of the upper guide shield near the rotating ring and the diameter of the end of the lower guide shield near the rotating ring are both equal to the diameter of the rotating ring.

10. The anaerobic reactor for co-processing sludge according to any one of claims 1 to 9, characterized in that, The second reaction chamber has a reflux outlet on its side wall and a reflux inlet on its lower side wall. A circulation pipe is connected between the reflux outlet and the reflux inlet, and the circulation pipe is connected to a circulation pump and a control valve.

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