Three-phase loop bioreactor

Abstract

The utility model discloses a three-phase circulation bioreactor. The three-phase circulation bioreactor comprises a shell, a communicated exhaust pipe is fixedly connected to the center of the top of the shell; a communicated overflow pipe is fixedly connected to the side wall of the top of the shell; a blow-off pipe and a water inlet pipe which are communicated with each other are fixedly connected to the periphery of the bottom of the shell; a net plate is fixedly connected to the middle of the interior of the shell; a biofilm carrier filler is arranged at a position, corresponding to the upper part of the screen plate, in the shell; the gas escapes upwards, so that the gas returns to the upper part of the water body after reaching the bottom of the sewage, the circulation effect is achieved, and the mixing effect of the gas and the sewage is further improved; besides, the spray heads can rotate along with the hollow shaft, and the spray heads on the different vortex-shaped pipes are arranged in a staggered manner, so that the distribution density of the gas in the sewage water body can be improved, the mixing effect between the sewage and the gas is further improved, the biological treatment reaction speed of the sewage is prevented from being influenced, and the purification efficiency of the reactor is improved.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater purification technology, specifically, it relates to a three-phase circulating bioreactor. Background Technology

[0002] Three-phase circulating bioreactors are highly efficient gas-liquid-solid three-phase reaction systems widely used in bioengineering, environmental engineering, and chemical engineering. Their core feature is the use of gas (such as air or inert gas) to drive fluid circulation within the reactor, achieving thorough mixing and mass transfer of the gas, liquid, and solid phases, thereby improving reaction efficiency.

[0003] In the wastewater treatment process, biofilm reactors use granular packing material and the microbial film attached to and growing on it as the main treatment medium. Fluid is passed through a bed formed by fixed solid materials, and wastewater comes into extensive contact with the biofilm. Under the action of the metabolism of microorganisms on the biofilm, organic pollutants in the wastewater are removed and the wastewater is purified.

[0004] To sustain the life activities of microorganisms within the reactor, an aeration device is needed to provide a sufficient oxygen supply. However, most currently widely used aeration equipment is fixedly installed, which limits the gas output location and makes it difficult to effectively mix the gas with the wastewater. Insufficient mixing affects the biological treatment reaction rate of the wastewater, thereby reducing the reactor's purification efficiency and performance. Utility Model Content

[0005] To address the technical problem in existing technologies where the gas entering the reactor is in a fixed position, making it difficult to effectively mix the gas with the wastewater and thus limiting the biological treatment rate of the wastewater, this invention provides a three-phase circulating bioreactor.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A three-phase circulating bioreactor includes a shell; a connected exhaust pipe is fixedly connected to the center of the top of the shell; a connected overflow pipe is fixedly connected to the side wall of the top of the shell; a connected sewage pipe and an inlet pipe are fixedly connected to the periphery of the bottom of the shell; a mesh plate is fixedly connected to the middle of the interior of the shell; a biofilm carrier packing is arranged inside the shell at a position corresponding to the upper part of the mesh plate; a hollow shaft is rotatably connected inside the shell at a position corresponding to the lower part of the mesh plate, the lower end of the hollow shaft passing through to the lower part of the shell via a shaft seal; multiple vortex tubes are fixedly connected to the hollow shaft at a position corresponding to the interior of the shell; multiple connected nozzles are fixedly connected to each vortex tube, and the nozzles are all arranged downwards; an air inlet pipe is connected to the lower end of the hollow shaft.

[0008] Furthermore, the lower end of the hollow shaft is connected to an air intake pipe via a rotary joint.

[0009] Furthermore, a driven gear is fixedly connected to the lower end of the hollow shaft; a motor is fixedly installed at the bottom of the housing; a driving gear is fixedly connected to the output end of the motor, and the driving gear meshes with the driven gear.

[0010] Furthermore, the vortex tubes are arranged longitudinally.

[0011] Furthermore, the nozzles on the same vortex tube are evenly arranged, while the nozzles on different vortex tubes are staggered.

[0012] Furthermore, the lower end of the hollow shaft is connected to a cleaning water pipe via a rotary joint, and the cleaning water pipe and the air intake pipe together form a three-way structure.

[0013] Furthermore, a second one-way valve is installed on the cleaning water pipe.

[0014] Furthermore, a first one-way valve is installed on the intake pipe.

[0015] Furthermore, a feeding port is provided on the top side of the shell; a discharging port is provided in the middle of the shell corresponding to the position above the mesh plate.

[0016] The beneficial effects of this utility model are:

[0017] 1) In this invention, since the air inlet pipe is connected to the hollow shaft via a rotary joint, gas can continue to be introduced while the hollow shaft is rotating. Since the nozzle faces downward, the gas can be sprayed towards the bottom of the sewage by providing strong pressure, thus mixing with the sewage. Furthermore, since the gas will escape upward, it will return to the top of the water body after reaching the bottom of the sewage, achieving a circulation effect and further improving the mixing effect between the gas and the sewage. In addition, since the nozzle rotates with the hollow shaft and the nozzles on different vortex tubes are arranged alternately, the gas distribution density in the sewage body can be increased, thereby further improving the mixing effect between the sewage and the gas, avoiding affecting the biological treatment reaction rate of the sewage, and improving the purification efficiency of the reactor.

[0018] 2) This utility model, through the cooperation of the nozzle and the cleaning water pipe, allows the nozzle to rotate, resulting in a better cleaning effect inside the housing; in addition, since the nozzle opening faces downward, a large amount of residual liquid will not enter the vortex tube, which facilitates subsequent use and can improve service life. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of the present invention;

[0021] Figure 2 This is a side view of the present invention;

[0022] Figure 3 This is a front sectional view of the present invention;

[0023] Figure 4 This is a side sectional view of the present invention;

[0024] Figure 5 This is a schematic diagram of the vortex tube structure in this utility model;

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Shell; 2. Exhaust pipe; 3. Overflow pipe; 4. Sewage pipe; 5. Water inlet pipe; 6. Feed port; 7. Feed outlet; 8. Mesh plate; 9. Biofilm carrier packing material; 10. Hollow shaft; 11. Vortex tube; 12. Nozzle; 13. Driven gear; 14. Driven gear; 15. Motor; 16. Rotary joint; 17. Air inlet pipe; 18. Cleaning water pipe; 19. First check valve; 20. Second check valve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1 - Figure 3 As shown, a three-phase circulating bioreactor includes a reactor shell 1; a connected exhaust pipe 2 is fixedly connected to the center of the top of the shell 1 for discharging waste gas; a connected overflow pipe 3 is fixedly connected to the side wall of the top of the shell 1 for discharging purified water; a connected sewage pipe 4 and a water inlet pipe 5 are fixedly connected to the periphery of the bottom of the shell 1, the sewage pipe 4 for discharging sewage and waste residue, and the water inlet pipe 5 for introducing sewage to be purified into the shell 1; a mesh plate 8 is fixedly connected in the middle of the shell 1; a biofilm carrier packing 9 is arranged inside the shell 1 corresponding to the position above the mesh plate 8, the biofilm carrier packing 9 is composed of packing balls, suspended balls inside the packing balls, and microorganisms attached to the surface of the suspended balls; a feeding port 6 is arranged on the side of the top of the shell 1; and a feeding port 7 is arranged in the middle of the shell 1 corresponding to the position above the mesh plate 8.

[0029] Please refer to it again. Figure 1 and Figure 4 As shown, a hollow shaft 10 is rotatably connected inside the housing 1 at a position corresponding to the lower part of the mesh plate 8. The lower end of the hollow shaft 10 passes through the shaft seal to the lower part of the housing 1. A driven gear 13 is fixedly connected to the lower end of the hollow shaft 10. A motor 15 is fixedly installed at the bottom of the housing 1. A driving gear 14 is fixedly connected to the output end of the motor 15. The driving gear 14 meshes with the driven gear 13 to drive the hollow shaft 10 to rotate.

[0030] Please refer to it again. Figure 2 and Figure 5 As shown, a plurality of vortex tubes 11 are fixed to the hollow shaft 10 at positions corresponding to the inside of the housing 1, and the vortex tubes 11 are arranged longitudinally; a plurality of connected nozzles 12 are fixed to each vortex tube 11, the nozzles 12 on the same vortex tube 11 are evenly arranged, the nozzles 12 on different vortex tubes 11 are staggered, and the nozzles 12 are all arranged downwards.

[0031] Please refer to it again. Figure 3 and Figure 4 As shown, the lower end of the hollow shaft 10 is connected to an air inlet pipe 17 via a rotary joint 16. The rotary joint 16 allows the hollow shaft 10 to remain connected to the air inlet pipe 17 while rotating. The air inlet pipe 17 is used to introduce gas into the housing 1. The lower end of the hollow shaft 10 is also connected to a cleaning water pipe 18 via the rotary joint 16. The cleaning water pipe 18 and the air inlet pipe 17 together form a three-way structure for introducing cleaning water into the housing 1. A first one-way valve 19 is installed on the air inlet pipe 17, and a second one-way valve 20 is installed on the cleaning water pipe 18. The first one-way valve 19 and the second one-way valve 20 are used to prevent liquid or gas backflow.

[0032] To facilitate understanding of the above-mentioned technical solution of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below:

[0033] The first step is to introduce the wastewater to be purified into the shell 1 through the inlet pipe 5, and to fill the shell 1 with biofilm carrier packing 9 through the feeding port 6, while maintaining the airtightness of the shell 1.

[0034] The second step involves using motor 15 in conjunction with drive gear 14 and driven gear 13 to drive hollow shaft 10 to rotate. Hollow shaft 10 drives vortex tube 11 to rotate inside shell 1, continuously disturbing the flow of sewage inside shell 1.

[0035] At the same time, gas for the reaction is introduced into the housing 1 through the air inlet pipe 17, so that the gas is injected into the housing 1 from the continuously moving nozzle, so that it is fully mixed with the sewage.

[0036] Since the air inlet pipe 17 is connected to the hollow shaft 10 via the rotary joint 16, gas, such as oxygen, can continue to flow into the hollow shaft 10 while it is rotating. Because the nozzle 12 faces downwards, strong pressure can be applied to propel the gas towards the bottom of the wastewater. Figure 3 The dashed arrows in the diagram indicate the gas flow path when the nozzle 12 is not rotating, allowing it to mix with the wastewater. Since the gas escapes upwards, it returns to the top of the water body after reaching the bottom, achieving a circulation effect and further improving the mixing effect between the gas and wastewater. Furthermore, because the nozzle 12 rotates with the hollow shaft 10, and the nozzles 12 on different vortex tubes 11 are arranged in an alternating pattern, the gas distribution density in the wastewater body can be increased, thereby further improving the mixing effect between the wastewater and gas, preventing the biological treatment reaction rate of the wastewater from being affected, and improving the purification efficiency of the reactor.

[0037] The third step is to continue to introduce sewage and gas into the shell 1. The gas after the reaction is discharged from the exhaust pipe 2, and the purified water flows out from the overflow pipe 3 and is then collected.

[0038] The fourth step is to remove all biofilm carrier materials from the feeding port 7, clean and decontaminate the packing material, or directly replace the new biofilm carrier packing material 9 from the feeding port 6.

[0039] Fifth step: introduce clean water into the housing 1 through the cleaning water pipe 18, and use the nozzle 12 to clean the inside of the housing 1 so that the dirt is drained away through the drain pipe 4 for the next use.

[0040] The nozzle 12 can be rotated to improve the cleaning effect inside the housing 1; in addition, since the opening of the nozzle 12 faces downward, a large amount of residual liquid will not enter the vortex tube 11, which facilitates subsequent use and can improve service life.

[0041] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, all of which should fall within the protection scope of this utility model.

Claims

1. A three-phase circulating bioreactor, comprising a shell (1); a communicating exhaust pipe (2) fixedly connected to the center of the top of the shell (1); a communicating overflow pipe (3) fixedly connected to the side wall of the top of the shell (1); and a communicating sewage pipe (4) and an inlet pipe (5) fixedly connected to the periphery of the bottom of the shell (1); characterized in that: A mesh plate (8) is fixedly connected in the middle inside the shell (1); a biofilm carrier packing material (9) is provided inside the shell (1) at a position above the mesh plate (8); a hollow shaft (10) is rotatably connected inside the shell (1) at a position below the mesh plate (8), and the lower end of the hollow shaft (10) passes through the lower part of the shell (1) via a shaft seal; multiple vortex tubes (11) are fixedly connected to the hollow shaft (10) at a position inside the shell (1); multiple connected nozzles (12) are fixedly connected to each vortex tube (11), and the nozzles (12) are all arranged downwards; an air inlet pipe (17) is connected to the lower end of the hollow shaft (10).

2. The three-phase circulating bioreactor according to claim 1, characterized in that: The lower end of the hollow shaft (10) is connected to an air intake pipe (17) via a rotary joint (16).

3. A three-phase circulating bioreactor according to claim 2, characterized in that: The hollow shaft (10) is fixedly connected to a driven gear (13) at its lower end; a motor (15) is fixedly installed at the bottom of the housing (1); a driving gear (14) is fixedly connected to the output end of the motor (15), and the driving gear (14) meshes with the driven gear (13).

4. A three-phase circulating bioreactor according to claim 1, characterized in that: The vortex tubes (11) are arranged longitudinally.

5. A three-phase circulating bioreactor according to claim 1, characterized in that: The nozzles (12) on the same vortex tube (11) are evenly arranged, while the nozzles (12) on different vortex tubes (11) are staggered.

6. A three-phase circulating bioreactor according to claim 2, characterized in that: The lower end of the hollow shaft (10) is also connected to a cleaning water pipe (18) via a rotary joint (16), and the cleaning water pipe (18) and the air inlet pipe (17) together form a three-way structure.

7. A three-phase circulating bioreactor according to claim 6, characterized in that: A second check valve (20) is installed on the cleaning water pipe (18).

8. A three-phase circulating bioreactor according to claim 1, characterized in that: A first one-way valve (19) is installed on the air intake pipe (17).

9. A three-phase circulating bioreactor according to claim 1, characterized in that: A feeding port (6) is provided on the top side of the shell (1); a material taking port (7) is provided in the middle of the shell (1) corresponding to the position above the mesh plate (8).

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