Internal circulation fluidized biological reaction device

Abstract

The utility model discloses an internal circulation fluidization biological reaction device which comprises a shell, a settling zone, an anaerobic zone, two anoxic zones and two aerobic zones are arranged in the shell, the bottom of the settling zone is respectively communicated with the two anoxic zones, the bottom of each anoxic zone is communicated with the bottom of the aerobic zone on the outer side of the anoxic zone, and the bottom of each anoxic zone is communicated with the bottom of the aerobic zone on the outer side of the anoxic zone. The top of each aerobic zone is communicated with the top of the anoxic zone on the inner side of the aerobic zone, the bottoms of the two aerobic zones are respectively communicated with the bottom of the anaerobic zone, a hydraulic stirrer is arranged in the anaerobic zone, an inclined pipe and a sludge collecting hopper are arranged in the settling zone, a sludge discharge pipe is arranged at the bottom of the sludge collecting hopper, and a water collecting tank is arranged right above the inclined pipe. The bottoms of the two aerobic zones are respectively provided with an aeration device, and the two anoxic zones and the two aerobic zones are respectively filled with biological fillers. The device utilizes a biofilm process and an activated sludge process, adopts modular design, improves the sewage treatment efficiency, and has the advantages of wide application range, energy conservation and emission reduction, efficient treatment, cost reduction, small sludge amount, simplicity in control, convenience in management and the like.

Description

Technical Field

[0001] The utility model belongs to the field of organic wastewater treatment, and specifically relates to an internal circulation fluidized biological reaction device. Background Art

[0002] The research on aerobic biological fluidized bed for organic wastewater treatment has a history of more than 40 years. It is a biological treatment device that combines the traditional activated sludge method with the biofilm method and introduces fluidization technology for sewage treatment. The internal circulation three-phase biological fluidized bed is an improved aerobic biological fluidized bed. It is a gas-liquid-solid three-phase coexistence system. Its structure reactor is filled with biological fillers, and aeration is used to drive the fluid to carry the biological carrier to circulate in the reactor. The degradation of organic matter in the wastewater is completed by the biofilm grown on the biological carrier. It has the advantages of high treatment efficiency, large volume load, strong impact resistance, compact equipment, and small footprint. However, it also has the disadvantage of being difficult to scale up. At present, it is mainly small-scale equipment and cannot be applied to large-scale sewage treatment. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an internal circulation fluidized bioreactor in view of the deficiencies in the prior art. The device utilizes a biofilm method and an activated sludge method, adopts a modular design, and introduces an internal circulation fluidized bioreactor in which aerobic zones, anoxic zones and anaerobic zones coexist, so as to improve the treatment efficiency of sewage. The device breaks through the limitation of traditional devices on the amount of sewage treatment water, and has the advantages of wide application range, energy saving and emission reduction, efficient treatment, cost reduction, small amount of sludge, simple control, convenient management, etc.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: an internal circulation fluidized bioreactor, comprising a shell, wherein a sedimentation zone, an anaerobic zone, two anoxic zones and two aerobic zones are arranged in the shell, wherein the anaerobic zone is arranged in the middle and lower part of the inner cavity of the shell, wherein the anaerobic zone is connected to an external sewage lifting system, wherein the sedimentation zone is arranged directly above the anaerobic zone, wherein the two anoxic zones are arranged above the anaerobic zone and symmetrically arranged on both sides of the sedimentation zone, wherein the bottom of the sedimentation zone is respectively communicated with the two anoxic zones, wherein an aerobic zone is arranged outside each anoxic zone, and wherein the bottom of each anoxic zone is connected to the outside thereof. The bottom of the aerobic zone is communicated with each other, the top of each aerobic zone is communicated with the top of the anoxic zone inside it, the bottoms of the two aerobic zones are communicated with the bottoms of the anaerobic zone respectively, a hydraulic agitator is arranged in the anaerobic zone, an inclined pipe and a mud collecting bucket are arranged in the sedimentation zone, the mud collecting bucket is arranged directly below the inclined pipe, a mud discharge pipe connected to an external sludge collection system is arranged at the bottom of the mud collecting bucket, a water collecting tank is arranged directly above the inclined pipe, and the water collecting tank is connected to an external clean water collection system, aeration devices are respectively installed at the bottoms of the two aerobic zones, and the two anoxic zones and the two aerobic zones are respectively filled with biological fillers.

[0005] The working principle of the internal circulation fluidized biological reaction device of the utility model is as follows: the sewage raw water of organic wastewater enters the anaerobic zone, and is stirred by the hydraulic agitator in the anaerobic zone to ensure the uniform distribution of the raw water and improve the anaerobic treatment effect; the sewage then enters the two aerobic zones through the bottom of the anaerobic zone, and is biologically aerated by the biological fillers filled in the aerobic zone, and then enters the anoxic zone from the top of the aerobic zone, and the nitrate in the sewage is reduced to nitrogen in the anoxic zone to achieve the purpose of denitrification; thereafter, the sewage enters the sedimentation zone from the bottom of the sedimentation zone, and part of the sludge returns to the aerobic zone from the bottom of the anoxic zone to continue biological aeration; after the sewage enters the sedimentation zone, it enters the inclined pipe upward for further sedimentation and separation and accurately controls the sludge return, that is, the suspended matter in the sewage is precipitated in the inclined pipe and falls into the sludge collecting bucket under the action of gravity, which is collected by the sludge collecting bucket and discharged into the external sludge collection system through the sludge discharge pipe, and the purified water enters the water collecting tank and is discharged into the external water purification collection system through the water collecting tank.

[0006] Preferably, the anaerobic zone is surrounded by two inclined plates and the front side plate, rear side plate and bottom plate of the shell, the tops of the two inclined plates are sealed and connected, the sedimentation zone is surrounded by two vertically arranged first baffles and the front side plate and rear side plate of the shell, the two anoxic zones are surrounded by two vertically arranged second baffles, two first baffles, two inclined plates and the front side plate and rear side plate of the shell, and the two aerobic zones are surrounded by two second baffles and the bottom plate, left plate, right plate, front side plate and rear side plate of the shell.

[0007] Preferably, the angle between each inclined plate and the bottom plate of the shell is ≥55°, so as to facilitate the sludge to slide from the bottom of the anoxic zone back to the aerobic zone and ensure biological activity.

[0008] Preferably, a plurality of water holes are provided at the bottom end of each inclined plate to ensure that sewage can smoothly enter the two aerobic zones through the bottom of the anaerobic zone.

[0009] Preferably, the height of the top of each of the first partitions is higher than the height of the top of each of the second partitions.

[0010] Preferably, the hydraulic agitator comprises a water pipe and a plurality of groups of water distribution branch pipes installed at equal intervals on the water pipe, and each group of the water distribution branch pipes is respectively provided with a plurality of water outlet holes communicating with the water pipe.

[0011] Compared with the prior art, the utility model has the following advantages: the internal circulation fluidized bioreactor of the utility model utilizes the biofilm method and the activated sludge method, adopts a modular design, and introduces an internal circulation fluidized bioreactor in which aerobic, anoxic and anaerobic zones coexist, thereby improving the treatment efficiency of sewage, and by strictly controlling the dissolved oxygen concentration in the device and the residence time of sewage in the aerobic, anoxic and anaerobic zones, precise aeration can be achieved, thereby achieving energy saving and efficiency improvement. The device has the advantages of a wide range of applications, energy saving and emission reduction, efficient treatment, reduced costs, small amount of sludge, simple control, and convenient management. The device breaks through the limitations of traditional devices on the amount of sewage treatment water, and can be optimized and designed using the device according to actual conditions, including new or renovated projects that can meet the design and use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the internal structure of the internal circulation fluidized bioreactor in the embodiment after the front side plate and the top plate are removed;

[0013] Figure 2 is a longitudinal cross-sectional view of the internal circulation fluidized bioreactor in the embodiment;

[0014] Figure 3 for Figure 2 Middle AA section view;

[0015] The specific reference numerals in the figure are as follows:

[0016] 1-shell, 11-rear side plate, 12-bottom plate, 13-left side plate, 14-right side plate, 2-sedimentation zone, 21-inclined pipe, 22-mud collecting bucket, 23-water collecting trough, 24-mud discharge pipe, 25-first baffle, 3-anaerobic zone, 31-inclined plate, 32-water hole, 4-anoxic zone, 41-second baffle, 5-aerobic zone, 51-aeration device, 6-hydraulic agitator, 61-water pipe, 62-water distribution branch pipe, 63-water outlet, 7-biological filler. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] The internal circulation fluidized bioreactor of the embodiment, such as Figure 1 to Figure 3 As shown, it includes a shell 1, in which a sedimentation zone 2, an anaerobic zone 3, two anoxic zones 4 and two aerobic zones 5 are arranged. The anaerobic zone 3 is arranged in the middle and lower part of the inner cavity of the shell 1. The anaerobic zone 3 is connected to an external sewage lifting system (not shown in the figure) through an inlet pipe (not shown in the figure). The sedimentation zone 2 is arranged just above the anaerobic zone 3, and the two anoxic zones 4 are arranged above the anaerobic zone 3 and symmetrically arranged on both sides of the sedimentation zone 2. The bottom of the sedimentation zone 2 is communicated with the two anoxic zones 4 respectively, and an aerobic zone 5 is arranged outside each anoxic zone 4. The bottom of each anoxic zone 4 is communicated with the bottom of the aerobic zone 5 outside it, and the top of each aerobic zone 5 is connected to the bottom of the aerobic zone 5 inside it. The top of the anoxic zone 4 on the two sides is communicated with each other, the bottoms of the two aerobic zones 5 are communicated with the bottoms of the anaerobic zones 3 respectively, a hydraulic agitator 6 is arranged in the anaerobic zone 3, an inclined pipe 21 and a mud collecting bucket 22 are arranged in the sedimentation zone 2, the mud collecting bucket 22 is arranged directly below the inclined pipe 21, a mud discharge pipe 24 connected to an external sludge collection system (not shown in the figure) is arranged at the bottom of the mud collecting bucket 22, a water collecting tank 23 is arranged directly above the inclined pipe 21, the water collecting tank 23 is connected to an external clean water collection system (not shown in the figure), aeration devices 51 are respectively installed at the bottoms of the two aerobic zones 5, and the two anoxic zones 4 and the two aerobic zones 5 are respectively filled with biological fillers 7.

[0019] In this embodiment, the anaerobic zone 3 is surrounded by two inclined plates 31 and the front side plate (not shown in the figure), the rear side plate 11 and the bottom plate 12 of the shell 1. The angle between each inclined plate 31 and the bottom plate 12 of the shell 1 is ≥55°. The tops of the two inclined plates 31 are sealed and connected. A plurality of water holes 32 are opened at the bottom end of each inclined plate 31. The sedimentation zone 2 is surrounded by two vertically arranged first partitions 25 and the front side plate and the rear side plate 11 of the shell 1. The two anoxic zones 4 are surrounded by two vertically arranged second partitions 41, two first partitions 25, two inclined plates 31 and the front side plate and the rear side plate 11 of the shell 1. The height of the top of each first partition 25 is higher than the height of the top of each second partition 41. The two aerobic zones 5 are surrounded by two second partitions 41 and the bottom plate 12, the left side plate 13, the right side plate 14, the front side plate and the rear side plate 11 of the shell 1.

[0020] In this embodiment, the hydraulic agitator 6 includes a water pipe 61 and a plurality of water distribution branch pipes 62 installed at equal intervals on the water pipe 61 , and each group of water distribution branch pipes 62 is provided with a plurality of water outlet holes 63 communicating with the water pipe 6 .

[0021] The working principle of the internal circulation fluidized bioreactor is as follows: the sewage of organic wastewater enters the anaerobic zone 3, and is stirred by the hydraulic agitator 6 in the anaerobic zone 3 to ensure uniform distribution of the raw water and improve the anaerobic treatment effect; the sewage then passes through the bottom of the anaerobic zone 3 and enters the two aerobic zones 5, and is biologically aerated by the biological fillers 7 filled in the aerobic zone 5, and then crosses the top of the second partition 41 and enters the anoxic zone 4, and the nitrate in the sewage is reduced to nitrogen in the anoxic zone 4 to achieve the purpose of denitrification; thereafter, the sewage passes through the sedimentation zone 2 The bottom of the sewage enters the sedimentation zone 2, while part of the sludge returns to the aerobic zone 5 from the bottom of the anoxic zone 4 to continue biological aeration; after the sewage enters the sedimentation zone 2, it enters the inclined pipe 21 upward for further sedimentation and separation and precise control of sludge return, that is, the suspended matter in the sewage is precipitated in the inclined pipe 21 and falls into the sludge collecting bucket 22 under the action of gravity, and is collected by the sludge collecting bucket 22 and discharged into the external sludge collection system through the sludge discharge pipe 24, while the purified water enters the water collecting tank 23 and is discharged into the external clean water collection system through the water collecting tank 23. Figure 1 and Figure 2 The short arrows indicate the direction of liquid flow.

[0022] The above reaction device also includes other components that enable the reaction device to be used normally, which are all conventional technical means in the art. The devices or components not limited in the present utility model all adopt conventional technical means in the art.

Claims

1. An internal circulation fluidized bioreactor, characterized in that: The invention comprises a shell, wherein a sedimentation zone, an anaerobic zone, two anoxic zones and two aerobic zones are arranged in the shell, wherein the anaerobic zone is arranged in the middle and lower part of the inner cavity of the shell, wherein the anaerobic zone is connected to an external sewage lifting system, wherein the sedimentation zone is arranged directly above the anaerobic zone, wherein the two anoxic zones are arranged above the anaerobic zone and symmetrically arranged on both sides of the sedimentation zone, wherein the bottom of the sedimentation zone is respectively communicated with the two anoxic zones, wherein an aerobic zone is arranged outside each anoxic zone, wherein the bottom of each anoxic zone is communicated with the bottom of the aerobic zone outside the anoxic zone, and wherein the bottom of each aerobic zone is communicated with the bottom of the aerobic zone outside the anoxic zone. The top is communicated with the top of the anoxic zone inside it, the bottoms of the two aerobic zones are respectively communicated with the bottoms of the anaerobic zones, a hydraulic agitator is arranged in the anaerobic zone, an inclined pipe and a mud collecting bucket are arranged in the sedimentation zone, the mud collecting bucket is arranged directly below the inclined pipe, a mud discharge pipe connected to an external sludge collection system is arranged at the bottom of the mud collecting bucket, a water collecting tank is arranged directly above the inclined pipe, the water collecting tank is connected to an external clean water collection system, aeration devices are respectively installed at the bottoms of the two aerobic zones, and the two anoxic zones and the two aerobic zones are respectively filled with biological fillers.

2. The internal circulation fluidized bioreactor according to claim 1, characterized in that: The anaerobic zone is surrounded by two inclined plates and the front side plate, rear side plate and bottom plate of the shell, the tops of the two inclined plates are sealed and connected, the sedimentation zone is surrounded by two vertically arranged first partitions and the front side plate and rear side plate of the shell, the two anoxic zones are surrounded by two vertically arranged second partitions, two first partitions, two inclined plates and the front side plate and rear side plate of the shell, and the two aerobic zones are surrounded by two second partitions and the bottom plate, left plate, right plate, front side plate and rear side plate of the shell.

3. The internal circulation fluidized bioreactor according to claim 2, characterized in that: The angle between each inclined plate and the bottom plate of the shell is ≥55°.

4. The internal circulation fluidized bioreactor according to claim 2, characterized in that: A plurality of water holes are provided at the bottom end of each inclined plate.

5. The internal circulation fluidized bioreactor according to claim 2, characterized in that: The height of the top of each of the first partitions is higher than the height of the top of each of the second partitions.

6. The internal circulation fluidized bioreactor according to claim 1, characterized in that: The hydraulic agitator comprises a water pipe and a plurality of water distribution branch pipes which are installed on the water pipe at equal intervals. Each group of the water distribution branch pipes is respectively provided with a plurality of water outlet holes which are communicated with the water pipe.

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