Integrated sewage treatment equipment

Abstract

Integrated sewage treatment equipment comprises a box body, an inner cavity of the box body is divided into an anaerobic zone, an aerobic zone, an anoxic zone, a membrane zone and an equipment zone through partition plates, the anaerobic zone, the aerobic zone, the anoxic zone and the membrane zone are sequentially communicated, water distributors are arranged in the anaerobic zone and the anoxic zone, water inlets of the water distributors are communicated with a water inlet pipe, a primary return pipe is communicated between the membrane zone and the aerobic zone, and a secondary return pipe is communicated between the membrane zone and the aerobic zone. The first-stage return pipe is provided with a reflux pump A for introducing a mixed solution in the membrane area into the aerobic area, the reflux pump A is arranged in the equipment room, the aerobic area is communicated with the anaerobic area through a second-stage return pipe, the second-stage return pipe is provided with a reflux pump B for introducing the mixed solution in the aerobic area into the anaerobic area, the reflux pump B is arranged at the lower part of the aerobic area, and the reflux pump B is arranged at the lower part of the anaerobic area. The equipment room is provided with a clear water area through a partition plate, and the equipment room is provided with a water absorption system for pumping the treated clear water into the clear water area from the MBR membrane component in the membrane area. Sewage and denitrifying bacteria in the tank can be fully fused, so that the reaction rate of the denitrification process is greatly improved, and the reaction time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an integrated sewage treatment device. Background Art

[0002] In recent years, the emission control of carbon, nitrogen, and phosphorus in rural domestic sewage has been highly concerned. At present, local corresponding standards have been introduced in various provinces and cities. Some places require that the emission indicators of chemical oxygen demand, total nitrogen, and total phosphorus reach the emission requirements of "30 mg / L, 15 mg / L, and 0.3 mg / L" partially or entirely.

[0003] Compared with urban domestic sewage treatment, rural domestic sewage has a short development time in China. The construction of facilities lags behind that of urban sewage treatment, and there are still many rural areas where sewage treatment facilities are blank. The traditional septic tanks, soil infiltration, and constructed wetland systems for rural sewage can no longer meet the current treatment requirements. At the same time, rural pollution sources are scattered, pipe networks are not easy to collect, and the terrain is complex, so it is not suitable to use treatment facilities with steel concrete structures. Therefore, decentralized integrated sewage treatment devices are widely used in rural decentralized sewage treatment projects due to their characteristics such as less civil engineering work, short construction period, unattended operation, and stable operation.

[0004] The integrated sewage treatment device disclosed in the prior art includes an anaerobic zone, an anoxic zone, and an aerobic zone connected in sequence. There is an MBR membrane module in the aerobic zone, and a microporous aeration device is provided at the bottom of the aerobic zone; it also includes a first-stage pump for feeding the mixed liquid in the aerobic zone into the anoxic zone, and a second-stage pump for feeding the mixed liquid in the anoxic zone into the anaerobic zone. The first-stage reflux liquid of this device flows back from the aerobic zone with a membrane module to the anoxic zone, and the second-stage reflux liquid flows back from the anoxic zone to the anaerobic zone. Since the dissolved oxygen content in the aerobic zone with a membrane module is relatively high, after flowing back to the anaerobic zone, it will cause the dissolved oxygen content in the anaerobic zone to exceed the normal value, affecting the treatment effect of the system. Summary of the Invention

[0005] The purpose of the utility model is to solve the above-mentioned deficiencies of the prior art, so as to provide an integrated sewage treatment device.

[0006] An integrated sewage treatment device includes a box body. The inner cavity of the box body is partitioned by a partition into an anaerobic zone, an aerobic zone, an anoxic zone, a membrane zone, and an equipment zone. The anaerobic zone, the aerobic zone, the anoxic zone, and the membrane zone are connected in sequence. There are water distributors in both the anaerobic zone and the anoxic zone. The water inlet of the water distributor is connected to the incoming water pipe. A first-stage return pipe is connected between the membrane zone and the aerobic zone. An A return pump for introducing the mixed liquid in the membrane zone into the aerobic zone is equipped on the first-stage return pipe. The A return pump is arranged in the equipment room. A second-stage return pipe is connected between the aerobic zone and the anaerobic zone. A B return pump for introducing the mixed liquid in the aerobic zone into the anaerobic zone is equipped on the second-stage return pipe. The B return pump is arranged at the lower part of the aerobic zone. The equipment room is partitioned by a partition into a clear water zone. There is a water suction system in the equipment room for sucking the treated clear water from the MBR membrane module in the membrane zone to the clear water zone.

[0007] There are aeration and agitation pipelines in both the anaerobic zone and the anoxic zone. There are aeration devices at the bottom of the aerobic zone and the membrane zone. The aeration devices are connected to a blower through a main air supply pipe. The aeration and agitation pipelines are connected to the main air supply pipe through branch air pipes. A switchable valve is equipped on the branch air pipe.

[0008] The aeration and agitation pipelines are located below the water distributors. The aeration device in the membrane zone is located directly below the MBR membrane module.

[0009] The water suction system includes a water suction pipe. One end of the water suction pipe is connected to the upper outlet of the MBR membrane module, and the other end is connected to the water inlet of the clear water zone. A water suction pump is equipped on the water suction pipe. There are two water suction pumps and they are arranged side by side.

[0010] It further includes an anti-flushing pipeline for anti-flushing the MBR membrane module. One end of the anti-flushing pipeline is connected to the clear water zone, and the other end is connected to the anti-flushing port of the MBR membrane module. There is an anti-flushing pump on the anti-flushing pipeline. The anti-flushing pump is arranged in the equipment zone.

[0011] A cleaning agent adding pipe is connected to the anti-flushing pipeline. The cleaning agent adding pipe is connected to a dosing tank. The dosing tank is located in the equipment zone. A dosing pump is equipped on the cleaning agent adding pipe.

[0012] The water distributor includes a main water inlet pipe, a main water distribution pipe, and multiple groups of branch pipe groups;

[0013] The main water inlet pipe extends along the Z direction. The bottom of the main water inlet pipe is connected to the main water distribution pipe;

[0014] The main water distribution pipe is a square structure formed by connecting two horizontal pipes and two vertical pipes;

[0015] Multiple groups of the branch pipe groups are arranged in sequence along the X direction or the Y direction inside the square of the main water distribution pipe. Each group of the branch pipe groups includes a branch pipe and a plurality of homogeneous dispersion pipes evenly distributed on the branch pipe. Both ends of the branch pipe are communicated with the main water distribution pipe. The upper end of each homogeneous dispersion pipe is communicated with the branch pipe, and the lower end is closed. Water outlet holes are annularly distributed on the outer wall of the homogeneous dispersion pipe.

[0016] The homogeneous dispersion pipe extends along the Z direction, and the homogeneous dispersion pipe is installed on the branch pipe through a hoop. The hoop is composed of an upper half hoop and a lower half hoop. The homogeneous dispersion pipe is fixed on the lower half hoop, and through holes communicated with the homogeneous dispersion pipe are arranged at corresponding positions of the lower half hoop and the branch pipe.

[0017] There are channels communicating adjacent two regions in the upper middle parts of two partitions, namely the partition between the anaerobic zone and the aerobic zone and the partition between the anoxic zone and the membrane zone. There is a channel communicating the aerobic zone and the anoxic zone in the lower middle part of the partition between the aerobic zone and the anoxic zone.

[0018] There are fillers in the middle parts of the anaerobic zone and the anoxic zone.

[0019] Compared with the prior art, the present utility model distributes the influent to the anaerobic tank and the anoxic tank to achieve multi-point influent, and can make full use of the organic matter in the influent for denitrification.

[0020] The present utility model intakes water simultaneously from a plurality of positions evenly at the bottom of the pool, which can fully mix the sewage and the denitrifying bacteria in the pool, greatly improve the reaction rate of the denitrification process, and shorten the reaction time.

[0021] The aerobic zone is arranged between the anaerobic zone and the anoxic zone. The membrane zone mixed liquor first flows back to the aerobic zone, and then the aerobic zone mixed liquor flows back to the anaerobic zone, avoiding directly flowing back the membrane zone mixed liquor with high oxygen content to the anaerobic zone, causing the oxygen content in the anaerobic zone to exceed the standard, and creating an anoxic and anaerobic environment to improve the nitrogen and phosphorus removal efficiency.

[0022] The present utility model makes full use of the carbon source in the raw water: most of the COD in the sewage is stored as an internal carbon source for nitrogen removal in the subsequent anoxic stage, and a small part of the COD enters the aerobic zone. In addition, simultaneous nitrification and denitrification can occur in the aerobic zone to further utilize the carbon source;

[0023] The present utility model has a small sludge yield: since most of the carbon source in this process is used to store as an internal carbon source for denitrification, and only a small part of the carbon source is utilized by heterotrophic bacteria in the aerobic zone, the sludge yield of this system is small, and the sludge treatment cost can be saved;

[0024] The present utility model adopts membrane tank effluent, which can further remove TN and TP, and make the effluent COD reach a lower level. The effluent water quality is excellent and stable, and the surplus sludge yield is small.

[0025] Device design, energy-efficient operation, easy transportation and assembly, especially suitable for the treatment of decentralized domestic sewage. Brief Description of the Drawings

[0026] Figure 1 It is the process flow diagram of the present utility model;

[0027] Figure 2 It is the structural schematic diagram of the present utility model;

[0028] Figure 3 It is the structural schematic diagram of the water distributor of the present utility model;

[0029] Figure 4 It is the structural schematic diagram of the homogeneous dispersion pipe of the present utility model. Detailed Embodiment

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present utility model and its application or use. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present utility model.

[0031] Figure 1 , Figure 2Inside the box body, the interior is partitioned into five regions by four vertical partitions. From left to right, the five regions are the anaerobic zone 1, the aerobic zone 2, the anoxic zone 3, the membrane zone 4, and the equipment zone 5. The anaerobic zone 1, the aerobic zone 2, the anoxic zone 3, and the membrane zone 4 are connected in sequence. In the upper middle part of the first partition from left to right, there is a passage connecting the anaerobic zone 1 and the aerobic zone 2. In the lower part of the second partition from left to right, there is a passage connecting the aerobic zone 2 and the anoxic zone 3. In the upper middle part of the third partition from left to right, there is a passage connecting the anoxic zone 3 and the membrane zone 4. In the upper middle part of the equipment room, a clear water zone 16 is partitioned by a partition. Inside the anaerobic zone 1 and the anoxic zone 3, there are fillers 15, water distributors 6, and aeration and agitation pipelines 8. The aeration and agitation pipelines 8 are located below the water distributors 6. The water inlet of the water distributor 6 is connected to the incoming water pipe 7, and a valve is provided at the water inlet end of the water distributor 6. At the bottom of the aerobic zone 2 and the membrane zone 4, there are aeration devices 17. The aeration device 17 in the membrane zone 4 is directly below the MBR membrane module 41. The aeration device 17 is connected to the blower 9 through the main air supply pipe 18. The aeration and agitation pipelines 8 are connected to the main air supply pipe 18 through the branch air pipes 19. A switchable valve 22 is equipped on the branch air pipe 19 to control the aeration time of the aeration and agitation pipelines 8 through the opening and closing of the valve 22, preventing excessive oxygen content in the anaerobic zone 1 and the anoxic zone 3 due to too long aeration and agitation time. A first-stage return pipe 11 is connected between the membrane zone 4 and the aerobic zone 2. An A return pump 12 for introducing the mixed liquid in the membrane zone 4 into the aerobic zone 3 is equipped on the first-stage return pipe 11. The A return pump 12 is installed in the equipment room. A second-stage return pipe 14 is connected between the aerobic zone 2 and the anaerobic zone 1. A B return pump 13 for introducing the mixed liquid in the aerobic zone 2 into the anaerobic zone 1 is equipped on the second-stage return pipe 14. The B return pump 13 is installed at the lower part of the aerobic zone 2. In the equipment room, there is a water suction system for sucking the treated clear water from the MBR membrane module 41 in the membrane zone 4 to the clear water zone 16.

[0032] The water suction system includes a water suction pipe 20. One end of the water suction pipe 20 is connected to the upper outlet of the MBR membrane module 41, and the other end is connected to the water inlet of the clear water zone 16. Two water suction pumps 21 are equipped on the water suction pipe 20 and are arranged side by side.

[0033] One end of the backwashing pipe for backwashing the MBR membrane module 41 is connected to the clear water zone, and the other end is connected to the backwashing port of the MBR membrane module 41. There is a backwashing pump on the backwashing pipe, and the backwashing pump is installed in the equipment zone. In addition, a cleaning chemical adding pipe is connected to the backwashing pipe. The cleaning chemical adding pipe is connected to the dosing tank. The dosing tank is located in the equipment zone, and a dosing pump is equipped on the cleaning chemical adding pipe.

[0034] Figure 3 、 Figure 4Among them, the main water distribution pipe 62 forms a square shape. Inside the main water distribution pipe 62, there are 6 branch pipes 63 arranged side by side and evenly distributed. The branch pipes 63 extend along the X direction or the Y direction. Both ends of the 6 branch pipes 63 are connected to the main water distribution pipe 62. There are 6 homogeneous dispersion pipes 64 evenly distributed on the branch pipes 63. The homogeneous dispersion pipes 64 extend along the Z direction. The upper end of the homogeneous dispersion pipe 64 is communicated with the corresponding branch pipe 63. The lower end of the homogeneous dispersion pipe 64 is closed. There are a plurality of water outlet holes 67 annularly distributed on the outer wall of the homogeneous dispersion pipe 64. The main water inlet pipe 61 extends along the Z direction. The bottom of the main water inlet pipe 61 is connected to the main water distribution pipe 62. The homogeneous dispersion pipe 64 is installed on the branch pipe 63 through a hoop. The hoop is composed of an upper half hoop 65 and a lower half hoop 66. The homogeneous dispersion pipe 64 is fixed on the lower half hoop 66. There are through holes communicated with the homogeneous dispersion pipe 64 at the corresponding positions of the lower half hoop 66 and the branch pipe 63. The sewage inlet pipe 7 is butted with the upper end of the main water inlet pipe 61. Then, the sewage flows downward from the main water inlet pipe 61 into the main water distribution pipe 62 and the branch pipes 63. Finally, it flows out around from the water outlet holes 67 on the outer wall of the homogeneous dispersion pipe 64. Water is simultaneously introduced from a plurality of positions evenly at the bottom of the pool. The dispersed water inlet can enable the sewage to be fully mixed with the denitrifying bacteria in the pool, and improve the reaction rate of the denitrification process.

Claims

1. An integrated sewage treatment device, characterized in that: It includes a box body. The inner cavity of the box body is partitioned by a partition into an anaerobic zone (1), an aerobic zone (2), an anoxic zone (3), a membrane zone (4) and an equipment zone (5). The anaerobic zone (1), the aerobic zone (2), the anoxic zone (3) and the membrane zone (4) are connected in sequence. There is a water distributor (6) in both the anaerobic zone (1) and the anoxic zone (3). The water inlet of the water distributor (6) is connected to a water inlet pipe (7). A first-stage reflux pipe (11) is connected between the membrane zone (4) and the aerobic zone (2). An A reflux pump (12) is equipped on the first-stage reflux pipe (11). The A reflux pump (12) is arranged in the equipment room. A second-stage reflux pipe (14) is connected between the aerobic zone (2) and the anaerobic zone (1). A B reflux pump (13) is equipped on the second-stage reflux pipe (14). The B reflux pump (13) is arranged at the lower part of the aerobic zone (2). The equipment room is partitioned by a partition into a clear water zone (16). There is a water suction system in the equipment room that sucks the treated clear water from the MBR membrane module (41) in the membrane zone (4) to the clear water zone (16).

2. An integrated sewage treatment device according to claim 1, characterized in that: There is an aeration and agitation pipeline (8) in both the anaerobic zone (1) and the anoxic zone (3). There is an aeration device (17) at the bottom of the aerobic zone (2) and the membrane zone (4). The aeration device (17) is connected to a blower (9) through a main air supply pipe (18). The aeration and agitation pipeline (8) is connected to the main air supply pipe (18) through a branch air pipe (19). A switchable valve (22) is equipped on the branch air pipe (19).

3. An integrated sewage treatment device according to claim 2, characterized in that: The aeration and agitation pipeline (8) is located below the water distributor (6). The aeration device (17) in the membrane zone (4) is located directly below the MBR membrane module (41).

4. An integrated sewage treatment device according to claim 1, characterized in that: The water suction system includes a water suction pipe (20). One end of the water suction pipe (20) is connected to the upper outlet of the MBR membrane module (41), and the other end is connected to the water inlet of the clear water zone (16). A water suction pump (21) is equipped on the water suction pipe (20). There are two water suction pumps (21) and they are arranged side by side.

5. An integrated sewage treatment device according to claim 1, characterized in that: It also includes an anti-flushing pipeline for the MBR membrane module (41). One end of the anti-flushing pipeline is connected to the clear water zone, and the other end is connected to the anti-flushing port of the MBR membrane module (41). There is an anti-flushing pump on the anti-flushing pipeline, and the anti-flushing pump is arranged in the equipment zone.

6. An integrated sewage treatment device according to claim 5, characterized in that: A cleaning agent adding pipe is connected to the anti-flushing pipeline. The cleaning agent adding pipe is connected to a dosing barrel. The dosing barrel is located in the equipment zone. A dosing pump is equipped on the cleaning agent adding pipe.

7. An integrated sewage treatment device according to claim 1, characterized in that: The water distributor (6) includes a main water inlet pipe (61), a main water distribution pipe (62) and multiple groups of branch pipe groups; The main water inlet pipe (61) extends along the Z direction. The bottom of the main water inlet pipe (61) is connected to the main water distribution pipe (62); The main water distribution pipe (62) is a square structure formed by connecting two horizontal pipes and two vertical pipes; A plurality of said branch pipe groups are arranged in sequence along the X direction or the Y direction inside the square of the water distribution main pipe (62). Each group of said branch pipe groups includes a branch pipe (63) and a plurality of homogeneous dispersion pipes (64) evenly distributed on the branch pipe (63). Both ends of the branch pipe (63) are communicated with the water distribution main pipe (62). The upper end of each homogeneous dispersion pipe (64) is communicated with the branch pipe (63), and the lower end is closed. Water outlet holes (67) are annularly distributed on the outer wall of the homogeneous dispersion pipe (64).

8. An integrated sewage treatment device according to claim 7, characterized in that: The homogeneous dispersion pipe (64) extends along the Z direction, and the homogeneous dispersion pipe (64) is installed on the branch pipe (63) through a hoop; the hoop is composed of an upper half hoop (65) and a lower half hoop (66). The homogeneous dispersion pipe (64) is fixed on the lower half hoop (66), and through holes communicated with the homogeneous dispersion pipe (64) are provided at corresponding positions of both the lower half hoop (66) and the branch pipe (63).

9. An integrated sewage treatment device according to claim 1, characterized in that: There are channels connecting adjacent two regions in the upper middle parts of the two partitions between the anaerobic zone (1) and the aerobic zone (2) and between the anoxic zone (3) and the membrane zone (4). There is a channel connecting the aerobic zone (2) and the anoxic zone (3) in the lower middle part of the partition between the aerobic zone (2) and the anoxic zone (3).

10. An integrated sewage treatment device according to claim 1, characterized in that: There is packing (15) in the middle parts of the anaerobic zone (1) and the anoxic zone (3).

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