CN113968618A

CN113968618A - Circulating continuous flow two-oxygen composite granular sludge purification treatment device

Info

Publication number: CN113968618A
Application number: CN202110713268.XA
Authority: CN
Inventors: 张崭华; 张恒
Original assignee: Beijing Proviridia Technology Co Ltd
Current assignee: Beijing Proviridia Technology Co Ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-01-25
Anticipated expiration: 2041-06-25
Also published as: CN113968618B

Abstract

A peripheral continuous flow two-oxygen composite granular sludge purification treatment device belongs to the technical field of water treatment equipment. Comprises an anoxic zone which is arranged in the inner space of the main body and is communicated with the water inlet part; an aerobic zone in communication with and downstream of the anoxic zone; a transition zone communicated with the aerobic zone and located downstream of the aerobic zone; and the inlet end of the first return pipe is positioned at the middle and downstream position in the transition zone, and the outlet end of the first return pipe is positioned in the anoxic zone. The first return pipe is arranged to return the nitrifying liquid from the transition area to the anoxic area, and the transition area is a non-aeration area, so that the water body can be subjected to dynamic standing sludge-water preliminary separation in the transition area, and a large amount of sludge can be prevented from returning to the anoxic area; meanwhile, the inlet end of the first return pipe is positioned at the middle-downstream position in the transition region, so that the liquid level difference between the inlet end of the first return pipe and the water outlet of the aerobic region is ensured, and the return flow of the nitrified liquid can meet the requirement.

Description

Circulating continuous flow two-oxygen composite granular sludge purification treatment device

Technical Field

The invention relates to the technical field of water treatment equipment, in particular to a peripheral continuous flow two-oxygen composite granular sludge purification treatment device.

Background

The internal process of the existing biochemical water treatment equipment is an A2/O process (also called anaerobic-anoxic-aerobic process) or an A/O process (also called anaerobic-aerobic process), and the two processes both need to carry out the reflux of nitrifying liquid, namely part of nitrifying liquid formed after the reaction of an aerobic section flows back to an anoxic section, so as to enhance the denitrification effect and improve the water purification effect.

In the prior art, two modes of nitrifying liquid backflow are provided, wherein one mode is that through holes are formed in a partition board separating an aerobic section from an anoxic section, and part of nitrifying liquid in the aerobic section directly flows back into the anoxic section through the through holes; the other mode is that an overflow port is arranged at the top of the aerobic section, a collecting pipeline positioned outside the equipment is arranged at the overflow port, the overflowing nitrified liquid flows back to the anoxic section under the action of gravity through the collecting pipeline, but because the inlet of the collecting pipeline needs to be arranged at the overflow port, the liquid level difference between the collecting pipeline and the aerobic section is very small, so that the reflux amount of the nitrified liquid is very small, and the requirement of the reflux amount of the nitrified liquid cannot be met.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the return mode of the nitrifying liquid in the prior art can cause the sludge containing nitrifying bacteria to enter an anoxic section or the return flow quantity does not meet the requirement, thereby providing the peripheral continuous flow two-oxygen composite particle sludge purification treatment device.

The invention provides the following technical scheme:

a peripheral continuous flow two-oxygen composite particle sludge purification treatment device comprises:

a main body provided with a water inlet part and a water outlet part;

an anoxic zone disposed in the inner space of the main body and communicated with the water inlet part;

the aerobic zone is arranged in the inner space of the main body, is communicated with the anoxic zone and is positioned at the downstream of the anoxic zone;

the transition zone is arranged in the inner space of the main body, is communicated with the aerobic zone and is positioned at the downstream of the aerobic zone;

a first return tube having an inlet end located at a mid-downstream location within the transition zone and an outlet end located within the anoxic zone.

Optionally, the inlet end of the first return tube is located above the outlet end.

Optionally, the method further comprises:

the first separating cylinder is arranged in the main body, one side of the first separating cylinder forms the transition region, the other side of the first separating cylinder forms at least one part of the aerobic region, the first separating cylinder is provided with a water inlet through which water enters the transition region from the aerobic region, and the inlet end of the first return pipe is far away from the water inlet.

Optionally, the method further comprises:

the second separating cylinder is arranged in the main body and is coaxial with the first separating cylinder, a transition region is formed between the second separating cylinder and the first separating cylinder, and the water inlet and the inlet end of the first return pipe are respectively arranged at two ends of the transition region.

Optionally, a mud guard is arranged above the inlet end of the first return pipe, the mud guard forms a mud guard space, and the inlet end of the first return pipe is arranged in the mud guard space.

Optionally, the fender is bent to form the fender space.

Optionally, the fender is connected with a cavity wall of the transition area, and an included angle space between the fender and the cavity wall forms the mud blocking space.

Optionally, the method further comprises:

the water body accelerating device is arranged in the anoxic zone, is connected with the water inlet part and at least partially reduces the inner diameter of the water body accelerating device along the flowing direction of the water body;

the outlet end of the first return pipe is communicated with the water body accelerating device.

Optionally, the water body accelerating device comprises:

the spraying pipe is arranged along the flowing direction of the water body, and at least one part of the spraying pipe is in a conical shape.

Optionally, the outlet end of the first return pipe is communicated with the nozzle and extends to the part with the reduced inner diameter of the nozzle.

Optionally, the method further comprises:

the anoxic zone tank body is arranged in the main body, the anoxic zone is formed in the anoxic zone tank body, and the rest part of the aerobic zone is formed between the anoxic zone tank body and the main body.

Optionally, an aeration device is arranged in the aerobic zone, an aerobic zone water inlet pipe communicated with the aerobic zone is arranged in the anoxic zone tank, and an outlet of the aerobic zone water inlet pipe extends to the lower part of the aeration device.

Optionally, a sludge settling zone is formed inside the second partition cylinder, the sludge settling zone is communicated with the transition zone and is located at the downstream of the transition zone, and the sludge settling zone is communicated with the water outlet portion.

The technical scheme of the invention has the following advantages:

1. the invention provides a peripheral continuous flow two-oxygen composite granular sludge purification treatment device, which comprises a main body, a water inlet part, a water outlet part and a water outlet part, wherein the main body is provided with a water inlet part and a water outlet part; an anoxic zone disposed in the inner space of the main body and communicated with the water inlet part; the aerobic zone is arranged in the inner space of the main body, is communicated with the anoxic zone and is positioned at the downstream of the anoxic zone; the transition zone is arranged in the inner space of the main body, is communicated with the aerobic zone and is positioned at the downstream of the aerobic zone; a first return tube having an inlet end located at a mid-downstream location within the transition zone and an outlet end located within the anoxic zone.

The invention is provided with the anoxic zone for carrying out denitrification reaction on the water body introduced by the water inlet part, then enters the aerobic zone for carrying out aerobic reaction so as to purify the water body, the nitrified liquid flowing out of the aerobic zone enters the transition zone, and the first return pipe is arranged for returning the nitrified liquid to the anoxic zone so as to enhance the denitrification effect and improve the water purification effect, because the nitrified liquid needs to flow out of the aerobic zone to the transition zone and then returns through the first return pipe, and the transition zone is a non-aeration zone, the water body can carry out dynamic standing mud-water primary separation in the transition zone, compared with the prior art that the nitrified liquid directly returns from the aerobic zone to the anoxic zone so as to cause the nitrified liquid to carry a large amount of sludge to enter the anoxic zone, the invention can avoid a large amount of sludge from returning into the anoxic zone by arranging the transition zone, thereby avoiding nitrified bacteria from entering the anoxic zone to disturb and reducing the denitrification reaction effect in the anoxic zone, thereby improving the water purification effect;

meanwhile, the inlet end of the first return pipe is positioned at the middle-downstream position in the transition region, so that the liquid level difference between the inlet end of the first return pipe and the water outlet of the aerobic region is ensured, and further the return flow of the nitrified liquid can meet the requirement.

2. According to the peripheral feeding type continuous flow two-oxygen composite particle sludge purification treatment device provided by the invention, the inlet end of the first return pipe is positioned above the outlet end.

The first reflux pipe of the invention adopts a mode of refluxing the nitrified liquid under the action of gravity to reflux the nitrified liquid to the anoxic zone, and a suction device is not needed, so that the power requirement of the device is reduced, and the energy consumption is further reduced.

3. The invention provides a peripheral continuous flow two-oxygen composite particle sludge purification treatment device, which further comprises a first separation cylinder arranged in the main body, wherein one side of the first separation cylinder forms the transition region, the other side of the first separation cylinder forms at least one part of the aerobic region, the first separation cylinder is provided with a water inlet through which water enters the transition region from the aerobic region, and the inlet end of the first return pipe is far away from the water inlet.

The invention is provided with the first separating cylinder to separate the transition area and the aerobic area, the water body directly enters the transition area from the aerobic area through the water inlet, the moving path of the water body is shortened, and the power requirement of the water body flowing is reduced, so that the equipment structure of the invention is more reasonable, meanwhile, the inlet end of the first return pipe is arranged far away from the water inlet, so that the inlet end of the first return pipe and the water inlet have a certain liquid level difference, and the return flow of the nitrified liquid is ensured.

4. The invention provides a peripheral continuous flow two-oxygen composite particle sludge purification treatment device, which further comprises a second separation cylinder arranged in the main body, wherein the second separation cylinder and the first separation cylinder are coaxially arranged, a transition zone is formed between the second separation cylinder and the first separation cylinder, and inlet ends of the water inlet and the first return pipe are respectively arranged at two ends of the transition zone.

According to the invention, the transition region is formed between the second separating cylinder and the first separating cylinder, and the second separating cylinder and the first separating cylinder are coaxially arranged, namely, the space between the second separating cylinder and the first separating cylinder is uniform, so that the flow velocity of the water body in the transition region is the same, the dynamic primary separation of standing mud and water in the transition region of the water body is ensured, and the condition that the dynamic primary separation of the standing mud and water is disturbed due to different water flow velocities caused by unbalanced space is avoided, therefore, the equipment structure of the invention is more reasonable; meanwhile, the water inlet and the inlet end of the first reflux pipe are respectively arranged at the two ends of the transition region, and a liquid level difference can be formed to ensure the reflux quantity of the nitrified liquid.

5. According to the peripheral continuous flow two-oxygen composite particle sludge purification treatment device provided by the invention, a mud guard is arranged above the inlet end of the first return pipe, a mud guard space is formed by the mud guard, and the inlet end of the first return pipe is arranged in the mud guard space.

The invention is provided with the mudguard, and the inlet end of the first return pipe is arranged in the mud blocking space formed by the mudguard, so that the sludge in the transition region is prevented from entering the first return pipe, the reaction space occupied by invalid sludge in the anoxic region is avoided, and the water treatment amount of the device is reduced.

6. According to the circumferential feeding type continuous flow two-oxygen composite particle sludge purification treatment device provided by the invention, the mud guard is bent to form the mud guard space.

The mud guard is bent to form a mud guard space so as to shield the inlet end of the first return pipe, and the structure is more suitable for arranging the inlet end of the first return pipe at the midstream position of the transition region.

7. According to the peripheral continuous flow two-oxygen composite particle sludge purification treatment device provided by the invention, the mudguard is connected with the cavity wall of the transition area, and the included angle space between the mudguard and the cavity wall forms the sludge blocking space.

The mudguard is connected with the cavity wall of the transition area, and the included angle space between the mudguard and the cavity wall forms a mudguard space to shield the inlet end of the first return pipe.

8. The invention provides a peripheral continuous flow two-oxygen composite particle sludge purification treatment device, which also comprises a water body acceleration device, wherein the water body acceleration device is arranged in the anoxic zone and is connected with the water inlet part, and at least one part of the inner diameter of the water body acceleration device is reduced along the flowing direction of a water body; the outlet end of the first return pipe is communicated with the water body accelerating device.

The water body acceleration device is arranged to enable the water body containing the sewage to enter the anoxic zone from the water inlet part, and at least one part of the inner diameter of the water body acceleration device is reduced, so that the instantaneous flow velocity of the water body is increased at the position, the flow velocity of the water body is further improved, the flow velocity requirement of the water body is met, an additional power device is not required to be arranged, the energy consumption can be reduced, and the processing complexity of the equipment is reduced;

meanwhile, the water flow velocity at the outlet of the water body accelerating device is increased due to the fact that at least one part of the inner diameter of the water body accelerating device is reduced, according to the Bernoulli principle, the water pressure at the outlet of the water body accelerating device is relatively low, the outlet end of the first return pipe is communicated with the water body accelerating device, so that nitrified liquid enters the first return pipe to flow back under the action of pressure, and the return flow of the nitrified liquid is guaranteed to meet the requirements.

9. The invention provides a peripheral continuous flow two-oxygen composite particle sludge purification treatment device, which comprises a spray pipe, wherein at least one part of the spray pipe is arranged in a conical shape along the flowing direction of a water body.

According to the invention, at least one part of the spray pipe is arranged to be conical, so that at least one part of the inner diameter of the spray pipe is reduced, the instantaneous flow velocity of the water body at the position is increased, the flow velocity of the water body is further improved, lower water pressure is generated at the outlet of the spray pipe according to the Bernoulli principle, and the conical spray pipe has a guiding effect, so that the resistance generated by impact of the water body at the position can be effectively reduced compared with the rectangular spray pipe, and the loss of water power is avoided.

10. According to the peripheral feeding type continuous flow two-oxygen composite particle sludge purification treatment device provided by the invention, the outlet end of the first return pipe is communicated with the spray pipe and extends to the part with the reduced inner diameter of the spray pipe.

The outlet end of the first return pipe extends to the part with the reduced inner diameter of the spray pipe, so that the nitrified liquid can be conveniently returned under the action of pressure; simultaneously, the setting can avoid directly getting into first backflow pipe through the water that the portion of intaking reduction of spray tube internal diameter got into the spray tube in, and then gets into and disturbs the water and carry out the state that the mud-water preliminary separation that stews of developments in the transition zone, and can't participate in the water purification reaction in good oxygen district and anoxic zone, leads to the water purification effect of equipment to reduce, also can lead to nitrifying the liquid and can't flow back simultaneously.

11. The invention provides a peripheral continuous flow two-oxygen composite particle sludge purification treatment device, which also comprises: the anoxic zone tank body is arranged in the main body, the anoxic zone is formed in the anoxic zone tank body, and the rest part of the aerobic zone is formed between the anoxic zone tank body and the main body.

The invention arranges the anoxic zone tank body to form the anoxic zone and the rest part of the aerobic zone, thereby avoiding the environment of the anoxic zone and the aerobic zone from being influenced and ensuring that the equipment structure of the invention is more reasonable.

12. The invention provides a peripheral feeding type continuous flow two-oxygen composite granular sludge purification treatment device, wherein an aeration device is arranged in an aerobic zone, an aerobic zone water inlet pipe communicated with the aerobic zone is arranged in an anoxic zone tank body, and an outlet of the aerobic zone water inlet pipe extends to the lower part of the aeration device.

According to the invention, the water inlet pipe of the aerobic zone is arranged to guide the effluent of the anoxic zone to the lower part of the aeration device for release, so that on one hand, gas in the aerobic zone is prevented from entering the anoxic zone to disturb denitrification reaction in the anoxic zone, and on the other hand, compared with the effluent of the anoxic zone, the effluent enters the aerobic zone from the upper part of the aeration device, the water body for aerobic reaction in the aerobic zone can be prevented from being disturbed, so that the aerobic reaction in the aerobic zone is insufficient, and the water purification effect of the device disclosed by the invention is influenced.

13. According to the peripheral continuous flow two-oxygen composite particle sludge purification treatment device provided by the invention, a sludge settling zone is formed inside the second partition cylinder, the sludge settling zone is communicated with the transition zone and is positioned at the downstream of the transition zone, and the sludge settling zone is communicated with the water outlet part.

The invention is provided with the sludge settling zone to carry out precipitation treatment on the effluent of the transition zone, so that the sludge in the water body is settled, and suspended matters in the water body are gathered and settled to carry out mud-water separation, thereby improving the water purification effect of the equipment.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front sectional view of example 1 of the present invention;

FIG. 2 is a side cross-sectional view of an anoxic zone tank provided in example 1 of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a top view of example 1 of the present invention;

FIG. 5 is a partial structural view of embodiment 2 of the present invention;

fig. 6 is a schematic structural view of a fender provided in embodiment 2 of the present invention.

Description of reference numerals:

1. a water inlet part; 2. a circulation pipe; 3. a mixing zone; 4. a water inlet pipe of the aerobic zone; 5. an aerator; 6. an aerobic zone; 7. a choke plate; 8. a second guide plate; 9. a transition zone; 10. a fender; 11. a first return pipe; 12. a sludge settling zone; 13. a separation zone; 14. an effluent weir; 15. a water outlet part; 16. a sludge hopper; 17. a sludge discharge pipe; 18. a tank body in an anoxic zone; 19. a main body; 20. a reaction zone; 21. a channel; 22. a second return pipe; 23. a first guide plate; 24. a first partition cylinder; 25. a second partition cylinder; 26. and (4) a spray pipe.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "first" and "second" are used for distinguishing and not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The embodiment provides a peripheral continuous flow two-oxygen composite particle sludge purification treatment device, as shown in figures 1-4, comprising

The main body 19 is provided with a water inlet part 1 and a water outlet part 15, the water inlet part 1 is used for introducing a water body containing sewage into the main body 19, and the water outlet part 15 is used for introducing the water body treated by the equipment; in this embodiment, the material of the main body 19 is not limited, and it may be a steel structure, a concrete structure, a polymer material, etc.; the shape of the main body 19 is not limited in this embodiment, and may be cylindrical, rectangular, or the like.

The anoxic zone is arranged in the inner space of the main body 19 and is communicated with the water inlet part 1 to perform denitrification reaction on the water body, the structure of the anoxic zone is not specifically limited in the embodiment, preferably, as shown in fig. 1 and 2, the anoxic zone tank 18 is arranged in the main body 19, the anoxic zone is formed in the anoxic zone tank 18, and the anoxic zone tank 18 is provided with an exhaust pipe which is introduced into the aerobic zone 6 or outside the main body 19 to exhaust gas generated by water body impact and denitrification reaction, so that the space of the anoxic zone is prevented from being occupied by the gas, and the water treatment amount of the embodiment is reduced; of course, in other embodiments, the separator may be arranged to separate the anoxic zone.

Further, the anoxic zone of the embodiment comprises a mixing zone 3 communicated with the water inlet part 1; a reaction zone 20 communicating with said mixing zone 3 through a channel 21; the second return pipe 22 is provided with a return water inlet end and a return water outlet end, the return water inlet end is communicated with the reaction zone 20, the return water outlet end is communicated with the mixing zone 3, the water body firstly enters the mixing zone 3 from the water inlet part 1 and is fully mixed under the action of the stirring equipment, the contact probability of denitrifying bacteria and the water body is improved, the water body and the denitrifying bacteria are fully mixed and then enter the reaction zone 20, the water fluidity is reduced because the stirring equipment is not arranged in the reaction zone 20, the water body can be fully subjected to denitrifying reaction in the reaction zone 20, and further the anoxic zone can complete the full denitrifying reaction, the second return pipe 22 is used for returning part of the water body in the reaction zone 20 to the mixing zone 3, so that dominant denitrifying bacteria formed in the reaction zone 20 can return to participate in the mixing zone 3, and raw water can be directly mixed and diffused with the dominant denitrifying bacteria, the strain selection time in the anoxic zone is greatly shortened, and the water body after denitrification reaction in the reaction zone 20 enters the aerobic zone 6 through the aerobic zone water inlet pipe 4; of course, the reaction in the reaction zone 20 and the mixing zone 3 is not an absolute division, and there is a mixing process in the reaction zone 20 and a denitrification reaction in the mixing zone 3.

The present embodiment does not specifically limit the structure of the passage 21, and it is preferable that the passage 21 is provided bent with a bent end extending toward the circulation water outlet of the circulation pipe 2 as shown in fig. 1. Make passageway 21 have the effect of blockking, block on the one hand that beneficial mud stays in mixing area 3 for participate in hydraulic circulation stirring water purification, on the other hand can block in the water gets into reaction zone 20 in a large amount, guarantee the water yield of participating in hydraulic circulation stirring in mixing area 3, in addition for the outlet water of passageway 21 opening part is in the flow state of sweeping in reaction zone 20, can prevent to produce in the reaction zone 20 mud and pile up.

Further, a first guide plate 23 is arranged in the reaction zone 20, as shown in fig. 2, the first guide plate 23 extends towards the water outlet of the channel 21, so that the effluent of the channel 21 impinges on the first guide plate 23 to change the flowing direction and flow rate of the water body, thereby promoting the mixing of the denitrifying bacteria and the water body through the disturbance of the water body, and in addition, the first guide plate 23 discharges the effluent of the channel 21 to ensure that the flow rate of the water body in the reaction zone 20 is reduced, thereby performing a sufficient denitrification reaction; the first guide plate 23 may be removably fixedly attached to the anoxic zone tank 28 by welding or bolting.

As a preferred scheme, the first guide plate 23 is provided with meshes, so that the outlet water of the channel 21 passes through the meshes to rise, the first guide plate 23 is prevented from causing large resistance to the outlet water of the channel 21, the water body is prevented from entering the reaction zone 20, and meanwhile, the meshes can also prevent gas and sludge from being accumulated below the first guide plate 23.

The stirring equipment in the mixing zone 3 of the embodiment adopts a hydraulic circulating stirring mode to reduce the energy consumption of the embodiment; set up water accelerating device in mixing zone 3 to be connected with income water portion 1, along the flow direction of water, at least partly emergence of water accelerating device's internal diameter reduces to accelerate the water, thereby satisfy the water and carry out the velocity of flow requirement that hydraulic circulation stirred, make this embodiment need not to set up extra auxiliary power device.

The structure of the water body acceleration device is not specifically limited in this embodiment, and preferably, as shown in fig. 1, the water body acceleration device of this embodiment includes a nozzle 26, which is connected to the water inlet portion 1, and at least a part of an inner diameter of the nozzle 26 is reduced along a flow direction of the water body to accelerate the water body, so as to meet a flow rate requirement of the water body for hydraulic circulation stirring, so that an additional auxiliary power device is not required to be disposed in this embodiment, a part of the nozzle 26 with a smaller inner diameter may be located at a middle portion or a water outlet end, in this embodiment, the nozzle is preferably disposed at the water outlet end, and a transition portion with a changed inner diameter is disposed in a tapered shape to reduce resistance of the water body flow, a cross section of the nozzle 26 may be rectangular, polygonal, circular, or circular to avoid dead corners on a pipe wall of the nozzle 26.

In order to further promote the water body to be fully mixed and stirred in the mixing zone 3, the circulating pipe 2 is covered outside the spraying pipe 26, two ends of the circulating pipe 2 along the flowing direction of the water body are respectively provided with a circulating water inlet and a circulating water outlet, gaps are respectively arranged between the circulating water inlet and the spraying pipe 26 as well as between the circulating water inlet and the bottom wall of the main body 19, so that the circulating water inlet is communicated with the water inlet part 1, the water body accelerated by the spraying pipe 26 enters the circulating pipe 2 and then enters the mixing zone 3 from the circulating water outlet, the water pressure at the outlet of the spraying pipe 26 is relatively low according to Bernoulli principle because at least one part of the inner diameter of the spraying pipe 26 is reduced, the water body in the mixing zone 3 can enter the circulating pipe 2 again through the gaps at the circulating water inlet part under the action of low-pressure and the pushing action of the water body, so that the water body forms hydraulic circulating stirring in the anoxic zone, the contact probability of denitrifying bacteria and the water body is improved through hydraulic circulating stirring, so that the water body is fully mixed with the denitrifying bacteria in the mixing zone 3; of course, in other embodiments, the stirring device may not be a hydraulic circulation stirring device, but a mechanical stirring device.

The present embodiment does not limit the concrete structure of the circulation pipe 2, and it may be a straight pipe, and preferably, the circulation pipe 2 of the present embodiment is arranged along the flowing direction of the water body, at least one part of the inner diameter of the water-saving device is reduced, so that the water body which enters the circulating pipe 2 again from the mixing area 3 and the water body which is sprayed out from the spray pipe 26 are accelerated, the flow velocity of the water body is further improved, the water body can be continuously subjected to hydraulic circulating stirring, the requirement of the spray pipe 26 on the acceleration of the water body can be reduced, further reducing the flow velocity requirement of the water entering the spray pipe 26, thereby reducing the power and energy consumption required for introducing the water into the spray pipe 26, furthermore, the transition part of the circulating pipe 2 with the changed inner diameter is arranged in a conical shape for reducing the flowing resistance of the water, meanwhile, in order to facilitate the effluent of the circulating pipe 2 to be uniformly diffused into the anoxic zone, the circulating water outlet of the circulating pipe 2 is preferably arranged in a diffusion shape.

In this case, in order to prevent the effluent from the circulation pipe 2 from directly entering the reaction zone 3, the present embodiment preferably arranges the channel 21 at the end of the anoxic zone away from the circulation water outlet of the circulation pipe 2.

In order to promote the water in the reaction zone 20 to flow back into the mixing zone 3 through the second return pipe 22, it is preferable to connect the return outlet end of the second return pipe 22 with the lower end of the circulation pipe 2, and the negative pressure generated by the outlet position of the spray pipe 26 drives the water to flow back, and at the same time, the water is prevented from entering the second return pipe 22 from the return outlet end, however, in other embodiments, the return outlet end of the second return pipe 22 may also be connected with the spray pipe 26, and the negative pressure generated by the outlet position of the spray pipe 26 drives the water to flow back, and in order to prevent the water entering the water portion 1 from entering the second return pipe 22, it is preferable to extend the return outlet end of the second return pipe 22 to the portion where the inner diameter of the spray pipe 26 is reduced.

The aerobic zone 6 is arranged in the inner space of the main body 19, is communicated with the anoxic zone and is positioned at the downstream of the anoxic zone, namely, the aerobic zone 6 and the anoxic zone are simultaneously arranged in the embodiment, namely, the aerobic zone is formed by compositing two oxygen gases, an aeration device is arranged in the aerobic zone 6, so that a water body can carry out aerobic reaction including nitration reaction in the aerobic zone 6, and the aerobic zone 6 is provided with an emptying pipe communicated with the outside of the main body 19 and used for emptying the aerobic zone 6 in maintenance and cleaning processes and simultaneously discharging sludge accumulated in the aerobic zone 6.

The structure of the aerobic zone 6 is not particularly limited in this embodiment, and preferably, as shown in fig. 1, a first partition cylinder 24 is arranged in the main body 19, a part of the aerobic zone 6 is formed between the first partition cylinder 24 and the main body 19, and the rest of the aerobic zone 6 is formed between the anoxic zone tank 18 and the main body 19; of course, in other embodiments, the aerobic zone 6 may be formed by only the first partition 24 and the main body 19, or the aerobic zone 6 may be a space partitioned by the partition in the main body 19.

In this embodiment, the communication structure between the anoxic zone and the aerobic zone 6 is not specifically limited, and preferably, as shown in fig. 1, the anoxic zone tank 18 is provided with an aerobic zone water inlet pipe 4 for communicating the reaction zone 20 and the aerobic zone 6, and an outlet of the aerobic zone water inlet pipe 4 extends to a position below the aeration device, so that the water body moves upward under the air lifting action of the aeration device, and meanwhile, the gas in the aerobic zone 6 can be prevented from entering the anoxic zone tank 18 through the aerobic zone water inlet pipe 4.

The structure of the aeration device is not specifically limited in this embodiment, and preferably, as shown in fig. 1 and 3, the aeration device of this embodiment includes a plurality of aerators 5, the plurality of aerators 5 are communicated through a gas pipeline, and the plurality of aerators 5 are arranged in a plurality of annular structures surrounding an anoxic tank 18, so that gas uniformly enters an aerobic zone 6 to perform a sufficient aerobic reaction, and simultaneously, the ascending gas of the annularly arranged aerators 5 forms an air curtain in the aerobic zone 6 to drive a water body to ascend, and then the water body descends under the action of its own gravity, so that two opposite longitudinal vortexes are formed between the air curtains, the mixing and reaction of the water body and aerobic bacteria including nitrobacteria are promoted by the circulating mixing effect of the longitudinal vortexes, and the longitudinal vortexes are beneficial to the suspension and hydraulic wiping of granules, thereby promoting the generation of granular sludge, and thus improving the mixed state benefit in the aerobic zone 6, furthermore, the water purification effect is improved, in addition, as the granular sludge is arranged in the aerobic zone 6, not only the aerobic reaction is carried out in the aerobic zone 6, but also the synchronous nitrification and denitrification reaction can be realized, and simultaneously, as the granular sludge has the purification function, the purification effect of the embodiment can be improved, so that the treatment load and the treatment water quantity of the embodiment are improved, and the treatment water quantity of the embodiment is 2-4 times of that of the prior art; of course, in other embodiments, the aeration device may be sufficient to introduce gas into the aerobic zone 6.

In order to further promote the formation of the longitudinal vortex in the aerobic zone 6, preferably, a second guide plate 8 is arranged in the aerobic zone 6, the second guide plate 8 can be welded with the first separating cylinder 24 and can also be detachably connected with the first separating cylinder 24 through bolts, the second guide plate 8 is positioned in the flowing direction of the water body flowing generated by the aerator 5, and the water body rising along with the air curtain is blocked by the second guide plate 8 to flow back, so that two opposite longitudinal vortices are formed between the air curtains in the aerobic zone 6.

In this embodiment, the structure of the second guide plate 8 is not specifically limited, and in order to avoid that the second guide plate 8 causes a large resistance to the flow of the water body, preferably, the second guide plate 8 is arranged obliquely and extends along the direction of the backflow of the water body or in the opposite direction, as shown in fig. 1, when the water body flows upwards to the position of the second guide plate 8, the water body collides with the second guide plate 8, and then can turn to flow downwards, and then converges with the rising water body to form a stable vortex; in order to avoid the accumulation of gas and sludge under the second guide plate 8, it is preferable that the second guide plate 8 is provided with an opening.

The transition zone 9 is arranged in the inner space of the main body 19, is communicated with the aerobic zone 6 and is positioned at the downstream of the aerobic zone 6, and because the transition zone 9 is a non-aeration zone, water flowing out of the aerobic zone 6 can be subjected to dynamic standing mud-water primary separation in the transition zone 9, so that the collected nitrified liquid for backflow has lower suspended matters and sludge content.

In this embodiment, the structure of the transition region 9 is not particularly limited, and preferably, as shown in fig. 1, a second partition cylinder 25 is disposed in the main body 19, the second partition cylinder 25 is disposed coaxially with the first partition cylinder 24, and the transition region 9 is formed between the second partition cylinder 25 and the first partition cylinder 24; of course, in other embodiments, the transition zone 9 may be any space separated within the body 19 by a partition.

The first separating cylinder 24 is provided with a water inlet through which water enters the transition region 9 from the aerobic region 6, and the structure of the water inlet is not particularly limited in this embodiment, preferably, as shown in fig. 1, the water inlet is a plurality of water through holes uniformly formed in the top of the first separating cylinder 24, the water through holes are preferably square through holes so as to screen sludge and enable the water to uniformly flow out, and the water in the aerobic region 6 passes through the water through holes and enters the transition region 9; of course, in other embodiments, the water may also directly flow over the first partition 24 and enter the transition area 9, and the top of the first partition 24 is the water inlet.

For preventing that the mud that separates in the transition zone 9 from piling up the space that occupies the holding water body in transition zone 9 bottom, further set up in the bottom of transition zone 9 and be suitable for the mud backward flow extremely the opening of aerobic zone 6, form this opening between first partition section of thick bamboo 24 bottom and the anoxic zone jar body 18 in this embodiment, the better granular sludge of settleability returns to aerobic zone 6 in through this opening in the transition zone 9, can supply granular sludge and nitrobacteria in the aerobic zone 6, promote the water purification effect of aerobic zone 6.

Because be equipped with aeration equipment in the aerobic zone 6, in order to prevent that the gas in the aerobic zone 6 from getting into transition zone 9 through the opening that the transition zone 9 bottom communicates aerobic zone 6, influence the water state in transition zone 9, and hinder mud to get into aerobic zone 6, this embodiment further sets up choke plate 7 at the opening part, and choke plate 7 is located in aerobic zone 6, and choke plate 7 is the plate body of being connected with anoxic zone jar body 18 welding or through bolt detachable, and it extends towards the bottom of aerobic zone 6 for form the hindrance at the opening part, avoid gas to get into transition zone 9.

The position of the choke plate 7 is not particularly limited in this embodiment, and preferably, as shown in fig. 1, the choke plate 7 is located below the opening of the transition zone 9 communicating with the aerobic zone 6, and above the opening, a second guide plate 8 is arranged, which second guide plate 8 cooperates with the choke plate 7 such that a passage is formed at the opening with a distance, so that it is more difficult for gas to enter the transition zone 9 through the passage.

In order to prolong the retention time of the water body in the transition zone 9, fully perform primary mud-water separation and improve the effects of mud-water separation and floc sludge granulation, in the embodiment, the inner cavity of the transition zone 9 is at least partially bent to form an inclined part, the bottom of the inclined part is communicated with the aerobic zone 6, and the inclined part is arranged, so that the path length of the transition zone 9 is prolonged, and meanwhile, the inclined part also has a guiding function, so that the granular sludge with better settleability falls on the side wall of the inclined part in the falling process and then moves towards the communication part between the bottom of the transition zone 9 and the aerobic zone 6 under the guiding function, and the granular sludge with better settleability can conveniently enter the aerobic zone 6; in the embodiment, the inclined part of the transition region 9 is formed by bending the first separating cylinder 24, so that the structural arrangement of the embodiment is more reasonable, and the space in the main body 19 is fully utilized; of course, in other embodiments, the inclined portion may not be provided when the height of the body 19 enables the path of the transition zone 9 to meet the requirements.

The inlet end of the first return pipe 11 is located at the middle-downstream position in the transition region 9, the outlet end of the first return pipe is located in the anoxic region, and a distance needs to be reserved between the inlet end of the first return pipe 11 and the water inlet of the transition region 9, so that a liquid level difference is formed between the inlet end of the first return pipe and the water inlet, the reflux amount of the digestive juice meets the requirement, and the inlet end of the first return pipe 11 is far away from the water inlet.

In this embodiment, the position of the inlet end of the first return pipe 11 is not specifically limited, and preferably, as shown in fig. 1, the water inlet of the transition region 9 and the inlet end of the first return pipe 11 are respectively disposed at two ends of the transition region 9, that is, the inlet end of the first return pipe 11 is disposed at a downstream position in the transition region 9, so as to form a liquid level difference, and further, the nitrified liquid entering the first return pipe 11 meets the requirement.

In this embodiment, the reflux manner of the nitrified liquid in the first reflux pipe 11 is not specifically limited, and preferably, as shown in fig. 1, the inlet end of the first reflux pipe 11 is located above the outlet end, that is, the inlet end of the first reflux pipe 11 is located at the upper part of the first reflux pipe 11, and the outlet end is located at the lower part of the first reflux pipe 11, so that the nitrified liquid is refluxed under the action of its own gravity, and a suction device is not required to be arranged, thereby reducing the power requirement of the apparatus of the present invention and further reducing the energy consumption; of course, in other embodiments, a reflux pump may be disposed on the first reflux pipe 11 to reflux the nitrified liquid.

Further, in order to avoid the mud and the suspended solid of separation to get into first return pipe 11 in the transition zone 9, and then occupy the water space in getting into the anoxic zone, this embodiment is equipped with fender 10 in the entry end top of first return pipe 11, fender 10 forms and keeps off the mud space, the entry end setting of first return pipe 11 is in keep off in the mud space.

The structure of the fender 10 is not specifically limited in this embodiment, and preferably, as shown in fig. 1, the fender 10 of this embodiment is welded or detachably connected to the second partition barrel 25 through a bolt, and is located on one side of the second partition barrel 25 away from the first partition barrel 24, so as to form an inclined portion of the transition region 9, and an included angle space between the fender 10 and the cavity wall forms the fender space; of course, in other embodiments, the mudguard 10 may also be disposed on the side of the second partition 25 adjacent to the first partition 24, or on the first partition 24.

In this embodiment, the position of the outlet end of the first return pipe 11 is not specifically limited, and preferably, the outlet end of the first return pipe 11 is communicated with the spray pipe 26 and extends to the portion of the spray pipe 26 with the reduced inner diameter; of course, in other embodiments, the outlet end of the first return pipe 11 may also be communicated with the lower end of the circulation pipe 2, and the pressure effect of the low pressure generated at the outlet of the spray pipe 26 can also drive the nitrified liquid to flow back; the outlet end of the first return pipe 11 can also be communicated with the anoxic zone tank 18, and the nitrified liquid flows back only under the action of gravity.

The sludge settling zone 12 is formed inside the second separating cylinder 25 and is positioned above the anoxic zone tank body 18 so as to reasonably utilize the internal space of the main body 19, and the sludge settling zone 12 is communicated with the transition zone 9 and is positioned at the downstream of the transition zone 9 so as to precipitate the effluent of the transition zone 9 to realize sludge-water separation; in this embodiment, the transition zone 9 surrounds the sludge settling zone 12 in the radial direction of the present embodiment, i.e. the radial direction of the main body 19, i.e. the cross section of the present embodiment, and the effluent of the transition zone 9 flows into the sludge settling zone 12 from the periphery of the sludge settling zone 12, i.e. in a peripheral manner.

In order to collect the sludge and suspended matters in the sludge settling zone 12 conveniently, in the preferred embodiment, as shown in fig. 1, a sludge bucket 16 located in the sludge settling zone 12 is arranged on the anoxic zone tank 18, the sludge bucket 16 is provided with a sludge discharge pipe 17 extending to the outside of the main body 19, as the water body in the sludge settling zone 12 moves upwards around the sludge bucket 16, the water body in the sludge bucket 16 is relatively static compared with the water body outside, the sludge and suspended matters can be gathered in the sludge bucket 16 and then discharged through the sludge discharge pipe 17, on one hand, the content of the sludge and suspended matters in the sludge settling zone 12 is reduced, the working pressure of the separation zone 13 is reduced, the water outlet effect is better, on the other hand, the amount of the sludge flowing back to the transition zone 9 and further entering the aerobic zone 6 is reduced, and the occupied space of the sludge in the aerobic zone 6 and the water body 19 is reduced.

In order to improve the water purification effect of the present embodiment, the separation area 13 is disposed at the top of the sludge settling area 12, the separation area 13 includes a plurality of inclined and parallel separation pipes, when the water body flows out of the separation pipes, suspended matters and smaller sludge are blocked and adsorbed on the separation pipes, and fall after being further gathered, so that the water purification effect can be further improved, the suspended matters in the water discharged from the present embodiment are reduced, and the water body flows out of the separation area 13 and then enters the water outlet weir 14 disposed above the separation area 13, and then is discharged from the water outlet portion 15; of course, in other embodiments, the separation zone 13 may not be provided, and only a certain space may be provided as the sludge settling zone 12 to perform sedimentation separation on the water body.

In the embodiment of the present invention, the flow path of the water body is as follows:

the water body enters the main body 19 from the water inlet part 1, the water body is accelerated through the spray pipe 26, the accelerated water body enters the mixing zone 3 through the circulating pipe 2, one part of the water body in the mixing zone 3 returns to the circulating pipe 2 for circular mixing under the action of gravity and the low pressure of the water body accelerating device, the other part of the water body enters the reaction zone 20 through the channel 21, one part of the water body in the reaction zone 20 returns to the mixing zone 3 through the second return pipe 22, the other part of the water body enters the aerobic zone 6 through the aerobic zone water inlet pipe 4, the water body forms a longitudinal vortex under the air lifting action of the aerator 5 for full mixing and reaction, and then enters the transition zone 9, wherein a small part of nitrified liquid returns to the anoxic zone through the first return pipe 11, and a large part of the water body enters the sludge settling zone 12 through an opening formed between the second partition barrel 25 and the anoxic zone tank 18, a small portion of the water in the sludge settling zone 12, carrying suspended matter and smaller sludge, enters a sludge hopper 16 and is discharged through a sludge discharge pipe 17, and a large portion of the water moves upward through the separation zone 13 and is discharged from the effluent portion 15 through an effluent weir 14.

Example 2

The difference between the cyclic continuous flow two-oxygen composite particle sludge purification treatment apparatus provided in this embodiment and embodiment 1 is only the position of the inlet end of the first return pipe 11 and the structural position of the mudguard 10, and only the differences are described in this embodiment, as shown in fig. 5 and fig. 6

In this embodiment, the inlet end of the first return pipe 11 is located at the midstream position in the transition region 9, and at this time, a certain distance is provided between the inlet end of the transition region 9 and the inlet end of the first return pipe 11 to form a liquid level difference, so as to ensure the return flow of the nitrified liquid.

The fender 10 of the present embodiment is connected to a first partition 24 and a second partition 25, which are bent to form a mud blocking space, and the inlet end of the first return pipe 11 is located in the mud blocking space.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A peripheral continuous flow two-oxygen composite particle sludge purification treatment device is characterized by comprising:

a main body (19) provided with a water inlet part (1) and a water outlet part (15);

an anoxic zone provided in an inner space of the main body (19) and communicated with the water inlet part (1);

an aerobic zone (6) disposed in the interior space of the body (19), in communication with and downstream of the anoxic zone;

a transition zone (9) arranged in the inner space of the body (19), communicating with the aerobic zone (6) and located downstream of the aerobic zone (6);

a first return pipe (11) having an inlet end located at a position intermediate downstream within said transition zone (9) and an outlet end located within said anoxic zone.

2. The circumferentially entering continuous flow two-oxygen composite particle sludge purification treatment plant according to claim 1, characterized in that the inlet end of the first return pipe (11) is located above the outlet end.

3. The circumferentially-feeding continuous flow two-oxygen composite particle sludge purification treatment device according to claim 1, further comprising:

the first separating cylinder (24) is arranged in the main body (19), one side of the first separating cylinder (24) forms the transition region (9), the other side of the first separating cylinder forms at least one part of the aerobic region (6), the first separating cylinder (24) is provided with a water inlet through which water enters the transition region (9) from the aerobic region (6), and the inlet end of the first return pipe (11) is far away from the water inlet.

4. The circumferentially-feeding continuous flow two-oxygen composite particle sludge purification treatment device according to claim 3, further comprising:

the second separating cylinder (25) is arranged in the main body (19), the second separating cylinder (25) and the first separating cylinder (24) are coaxially arranged, the transition region (9) is formed between the second separating cylinder (25) and the first separating cylinder (24), and the inlet ends of the water inlet and the first return pipe (11) are respectively arranged at two ends of the transition region (9).

5. The circumferentially entering continuous flow two-oxygen composite particle sludge purification treatment device according to any one of claims 1 to 4, wherein a mudguard (10) is arranged above the inlet end of the first return pipe (11), the mudguard (10) forms a mud blocking space, and the inlet end of the first return pipe (11) is arranged in the mud blocking space.

6. The peripherally-fed continuous flow two-oxygen composite granular sludge purification treatment plant of claim 5, wherein said mudguard (10) is bent to form said mudguard space.

7. The peripherally-fed continuous flow two-oxygen composite granular sludge purification treatment plant according to claim 5, wherein the mudguard (10) is connected with the wall of the transition zone (9), and the space of an included angle between the mudguard (10) and the wall of the cavity forms the mud blocking space.

8. The peripheral inflow continuous flow two-oxygen composite particle sludge purification treatment apparatus according to any one of claims 1 to 4, further comprising:

the water body accelerating device is arranged in the anoxic zone, is connected with the water inlet part (1), and at least one part of the inner diameter of the water body accelerating device is reduced along the flowing direction of the water body;

the outlet end of the first return pipe (11) is communicated with the water body accelerating device.

9. The circumferentially-feeding continuous flow two-oxygen compound particle sludge purification treatment device of claim 8, wherein the water body acceleration device comprises:

a nozzle (26), at least a portion of the nozzle (26) being conically arranged in the direction of flow of the body of water.

10. The circumfery type continuous flow two-oxygen composite particle sludge purification treatment device according to claim 9, wherein the outlet end of the first return pipe (11) is communicated with the spray pipe (26) and extends to the part of the reduced inner diameter of the spray pipe (26).

11. The circumferentially-feeding continuous flow two-oxygen composite particle sludge purification treatment device according to claim 4, further comprising:

the anoxic zone tank body (18) is arranged in the main body (19), the anoxic zone is formed in the anoxic zone tank body (18), and the rest part of the aerobic zone (6) is formed between the anoxic zone tank body (18) and the main body (19).

12. The peripherally-fed continuous flow two-oxygen composite granular sludge purification treatment plant as claimed in claim 11, wherein an aeration device is arranged in said aerobic zone (6), said anoxic zone tank (18) is provided with an aerobic zone water inlet pipe (4) communicated with said aerobic zone (6), and the outlet of said aerobic zone water inlet pipe (4) extends to the lower part of said aeration device.

13. The peripherally-fed continuous flow two-oxygen composite granular sludge purification treatment plant according to claim 4, wherein said second partition (25) internally forms a sludge settling zone (12), and said sludge settling zone (12) is in communication with said transition zone (9) and is located downstream of said transition zone (9), said sludge settling zone (12) being in communication with said effluent section (15).