Automatic sludge backflow device for sewage treatment

Abstract

The utility model provides an automatic sludge backflow device for sewage treatment, and belongs to the technical field of sewage treatment. Comprising a transfer cylinder and a sludge pump, the transfer cylinder is internally provided with a gas stripping mechanism for realizing sludge backflow operation, and the lower end of the transfer cylinder is fixedly connected with a collecting funnel. By starting the telescopic cylinder, the rubber plug, the guide plate and the isolation cover move downwards together, the isolation cover is attached to the inner wall of the partition plate and moves to the upper end of the circular plate, the guide plate and the isolation cover are matched to play a role in protecting the telescopic cylinder, and sludge is prevented from contaminating the telescopic cylinder and affecting work of the telescopic cylinder; the residual sludge in the collecting funnel slides into the collecting box due to the gravity action and the flow guide action of the flow guide plate, and then the sludge pump is started to suck out the sludge in the collecting box through the discharge pipe, so that the sludge in the collecting funnel can be discharged and treated, and the interior of the gas stripping device is kept clean; and parts in the transfer cylinder and the collecting funnel are well protected from being rusted.

Description

Technical Field

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

[0002] Since sludge return is a key process step in ensuring effluent quality in sewage treatment plants, controlling the activated sludge return volume and return ratio becomes crucial for operational operation when water volume and quality fluctuate significantly. Through sludge return, the sludge that settles in the secondary sedimentation tank after entering the biochemical tank effluent is returned to the system to maintain a stable activated sludge volume and normal treatment process. Currently, sludge return is generally achieved using an air stripping device. This device uses a tubular aerator to generate bubbles in the rotary drum, increasing the air pressure inside the drum and squeezing out the sludge accumulated at the bottom of the drum to complete the sludge return operation.

[0003] In the prior art, a Chinese patent with authorization publication number CN212941638U discloses an automatic activated sludge return device, which includes a bottom plate, a sedimentation tank, a diversion pipe group, a diversion plate, a reflux cylinder, a sludge discharge cylinder, a diversion motor and a sludge discharge motor. The sedimentation tank is installed on the bottom plate through support legs, and the diversion pipe group is installed at the bottom of the sedimentation tank.

[0004] However, in the prior art, after the air stripping device stops working, the aerator no longer generates bubbles, which further causes the air pressure in the transfer drum to remain stable, and the sludge and water in the transfer drum cannot be completely discharged. The sludge remaining in the transfer drum is prone to breeding bacteria and microorganisms, which is not conducive to keeping the interior of the air stripping device clean, and is likely to cause the metal parts inside the air stripping device to rust. Therefore, the present application provides a sludge automatic reflux device for sewage treatment to meet the needs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a sludge automatic reflux device for sewage treatment to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A sludge automatic reflux device for sewage treatment, comprising a rotary drum and a sludge pump, wherein an air stripping mechanism for realizing sludge reflux operation is provided in the rotary drum, a collecting funnel is fixedly connected to the lower end of the collecting funnel, an inverting funnel is fixedly connected to the lower end of the inverting funnel, a collecting box is fixedly connected to the lower end of the collecting box, a circular plate is provided at the lower end of the collecting box, a telescopic cylinder is fixed at the center position of the upper surface of the circular plate, a rubber stopper is fixed at the telescopic end of the telescopic cylinder, a guide plate is fixedly connected to the lower edge position of the rubber stopper, and the guide plate is in the form of an inverted funnel The lower end of the guide plate is fixedly connected to the isolation cover, and the bottom of the inner wall of the collecting box is fixedly connected to the annular partition, the inner wall of the partition is fitted with the outer wall of the isolation cover, the height of the partition is equal to the height of the isolation cover, and the outer wall of the collecting box is fixedly connected to the discharge pipe, one end of the discharge pipe is fixedly installed with the input end of the sludge pump, when the telescopic end of the telescopic cylinder is retracted to the shortest position, the connection position of the guide plate and the isolation cover is flush with the partition, and when the telescopic end of the telescopic cylinder is extended to the longest position, the outer walls of the rubber stopper and the guide plate are fitted with the inner wall of the inverted funnel.

[0008] The drainpipe extends outwardly from the drainpipe, and the drainpipe extends outwardly from the drainpipe, where it is connected to the drainpipe for draining out the sewage.

[0009] Preferably, the rubber stopper is truncated cone-shaped.

[0010] Preferably, the outer surface of the guide plate is on the extension line of the outer surface of the rubber stopper.

[0011] Preferably, one end of the water outlet pipe located outside the middle rotating drum is bent downward.

[0012] Preferably, one end of the mud guide pipe located outside the middle rotating drum is bent downward.

[0013] Preferably, one end of the feed pipe located outside the middle drum is bent downward.

[0014] Preferably, a plurality of groups of supporting legs are fixed to the outer wall of the middle rotating cylinder near the lower end.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] In the above scheme, by starting the telescopic cylinder, the telescopic end of the telescopic cylinder shortens and drives the rubber plug, guide plate and isolation cover to move downward together. The isolation cover fits the inner wall of the partition and moves to the upper end of the circular plate. The guide plate and the isolation cover cooperate to play a protective role for the telescopic cylinder, preventing sludge from contaminating the telescopic cylinder and affecting the operation of the telescopic cylinder. The sludge remaining in the collecting funnel slides into the collecting box due to its own gravity and the guiding effect of the guide plate. Then the sludge pump is started to suck the sludge in the collecting box out through the discharge pipe, thereby completing the discharge treatment of the sludge in the collecting funnel, keeping the interior of the air lift device clean, and well protecting the parts in the transfer cylinder and the collecting funnel from rust. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable one skilled in the relevant art to make and use the present disclosure.

[0018] Figure 1 This is a schematic diagram of the front three-dimensional structure of an automatic sludge return device for sewage treatment;

[0019] Figure 2 This is a schematic diagram of the internal structure of the rotary drum of the automatic sludge return device for sewage treatment;

[0020] Figure 3 This is a cross-sectional diagram of the inverting funnel and collection box of the automatic sludge return device for sewage treatment.

[0021] [Reference Signs]

[0022] 1. Transfer cylinder; 2. Collecting funnel; 3. Inverting funnel; 4. Rubber stopper; 5. Telescopic cylinder; 6. Guide plate; 7. Isolation cover; 8. Collecting box; 9. Partition; 10. Discharge pipe; 11. Sludge pump; 12. Aerator; 13. Mud guide pipe; 14. Middle pipe; 15. Feed pipe; 16. Outlet pipe; 17. Vent; 18. Vent mounting block.

[0023] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION

[0024] The following describes in detail an automatic sludge return device for sewage treatment provided by the present invention, in conjunction with the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may also adopt other alternatives for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0025] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0026] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0027] like Figure 1-Figure 3As shown, the embodiment of the present invention provides an automatic sludge return device for sewage treatment, comprising a rotating drum 1 and a sludge pump 11. An air stripping mechanism for realizing sludge return operation is provided in the rotating drum 1. A collecting funnel 2 is fixedly connected to the lower end of the rotating drum 1. An inverting funnel 3 is fixedly connected to the lower end of the collecting funnel 2. A collecting box 8 is fixedly connected to the lower end of the inverting funnel 3. A circular plate is provided at the lower end of the collecting box 8. A telescopic cylinder 5 is fixed at the center position of the upper surface of the circular plate. The telescopic cylinder 5 The telescopic end is fixed with a rubber stopper 4, and the lower edge of the rubber stopper 4 is fixedly connected with a guide plate 6. The guide plate 6 is in the shape of an inverted funnel, and the lower end of the guide plate 6 is fixedly connected with an isolation cover 7. The bottom of the inner wall of the collecting box 8 is fixedly connected with an annular partition 9. The inner wall of the partition 9 fits the outer wall of the isolation cover 7. The height of the partition 9 is equal to the height of the isolation cover 7. The outer wall of the collecting box 8 is fixedly connected with a discharge pipe 10. One end of the discharge pipe 10 is fixedly installed with the input end of the sludge pump 11. When the telescopic end of the telescopic cylinder 5 is retracted to the shortest position, the connection position of the guide plate 6 and the isolation cover 7 is flush with the partition 9. When the telescopic end of the telescopic cylinder 5 is extended to the longest position, the outer walls of the rubber plug 4 and the guide plate 6 are in contact with the inner wall of the inverted funnel 3. By starting the telescopic cylinder 5, the telescopic end of the telescopic cylinder 5 is shortened, driving the rubber plug 4, the guide plate 6 and the isolation cover 7 to move downward together. The isolation cover 7 is in contact with the inner wall of the partition 9 and moves to the upper end of the circular plate. The guide plate 6 and the isolation cover 7 can cooperate to In order to play a protective role for the telescopic cylinder 5, it prevents the sludge from contaminating the telescopic cylinder 5 and affecting the operation of the telescopic cylinder 5. The sludge remaining in the collecting funnel 2 slides into the collecting box 8 due to its own gravity and the diversion effect of the guide plate 6. Then the sludge pump 11 is started to suck the sludge in the collecting box 8 out through the discharge pipe 10, thereby completing the discharge treatment of the sludge in the collecting funnel 2, keeping the interior of the air stripping device clean, and well protecting the parts in the transfer cylinder 1 and the collecting funnel 2 from rust.

[0028] like Figure 1-Figure 3As shown, in this embodiment, the air stripping mechanism includes a mud guide pipe 13 and an aerator 12. The mud guide pipe 13 is located at the center of the rotating drum 1. The outer wall of the vertical section is fixed with a middle pipe 14. The side wall of the middle pipe 14 is penetrated and connected with a feed pipe 15 for introducing sewage. The feed pipe 15 penetrates the upper end of the side wall of the rotating drum 1. The upper end of the middle pipe 14 is sealed at the connection position with the mud guide pipe 13. The lower end of the middle pipe 14 penetrates the aerator 12 and is fixedly connected to the diffusion hopper. The lower end of the mud guide pipe 13 is close to the bottom of the collecting funnel 2. The upper end of the rotating drum 1 penetrates and is fixed with a ventilation installation. Block 18, the turning end of the mud guide pipe 13 is fixed inside the ventilation mounting block 18, and the other end of the mud guide pipe 13 is through the upper end of the side wall of the rotating drum 1 for draining sludge, the lower end of the ventilation mounting block 18 is provided with a plurality of ventilation holes, the upper end of the ventilation mounting block 18 is connected with a connecting pipe, one end of the connecting pipe is fixedly installed with a vent 17, the upper end of the side wall of the rotating drum 1 is fixed with a water outlet pipe 16 for draining clean water, the rubber plug 4 is truncated, the outer surface of the guide plate 6 is on the extension line of the outer surface of the rubber plug 4, in this embodiment, the water outlet pipe 16 One end of the outer side of the rotating drum 1 is bent downward. In this embodiment, the end of the mud guide pipe 13 on the outer side of the rotating drum 1 is bent downward. The end of the feed pipe 15 on the outer side of the rotating drum 1 is bent downward. A plurality of supporting legs are fixed to the outer wall of the rotating drum 1 near the lower end. Before working, the rubber stopper 4 is fitted with the inner wall of the inverted funnel 3 to make the bottom of the collecting funnel 2 sealed. The rotating drum 1 and the collecting funnel 2 are filled with liquid. First, the sewage is passed from the feed pipe 15 into the middle pipe 14 and flows along the middle pipe 14 to the bottom of the diffusion bucket. At this time, the sludge and The water will gradually separate into layers due to different densities, and the sludge will settle at the bottom of the collecting funnel 2. Then, by starting the aerator 12, the aerator 12 will explode the gas to form bubbles, and the vent 17 outlet will be closed. The bubbles will quickly float to the top of the box and accumulate. At this time, due to the increase in internal air pressure, part of the liquid in the collecting funnel 2 will be discharged through the water outlet pipe 16, and the sludge at the bottom of the collecting funnel 2 will be discharged through the mud guide pipe 13, completing the automatic sludge reflux operation. By controlling the air inlet and outlet of the vent 17, the airflow through the ventilation mounting block 18 can be adjusted, and the air pressure in the transfer cylinder 1 can be further adjusted.

[0029] The technical solution provided by the present invention is that before work, the rubber stopper 4 is first fitted with the inner wall of the inverted funnel 3 to make the bottom of the collecting funnel 2 in a sealed state, and the transfer cylinder 1 and the collecting funnel 2 are filled with liquid. First, the sewage is passed into the middle pipe 14 from the feed pipe 15 and flows along the middle pipe 14 to the bottom of the diffusion bucket. At this time, the sludge and water in the sewage will gradually be separated due to different densities, and the sludge is settled at the bottom of the collecting funnel 2. Then, by starting the aerator 12, the aerator 12 explodes gas to form bubbles, and the vent 17 outlet is closed. The bubbles quickly float to the top of the box and accumulate. At this time, due to the increase in internal air pressure, part of the liquid in the collecting funnel 2 is discharged through the water outlet pipe 16, and the sludge at the bottom of the collecting funnel 2 is discharged through the mud guide pipe 13, completing the automatic sludge reflux operation, and by controlling the air in and out of the vent 17, the air flow through the ventilation mounting block 18 can be adjusted to further adjust the air pressure in the transfer cylinder 1.

[0030] By starting the telescopic cylinder 5, the telescopic end of the telescopic cylinder 5 shortens and drives the rubber plug 4, the guide plate 6 and the isolation cover 7 to move downward together. The isolation cover 7 fits the inner wall of the partition 9 and moves to the upper end of the circular plate. The guide plate 6 and the isolation cover 7 cooperate to play a protective role in the telescopic cylinder 5, preventing the sludge from contaminating the telescopic cylinder 5 and affecting the operation of the telescopic cylinder 5. The sludge remaining in the collecting funnel 2 slides into the collecting box 8 due to its own gravity and the guiding effect of the guide plate 6. Then the sludge pump 11 is started to suck the sludge in the collecting box 8 out through the discharge pipe 10, thereby completing the discharge treatment of the sludge in the collecting funnel 2, keeping the interior of the air stripping device clean, and well protecting the parts in the transfer cylinder 1 and the collecting funnel 2 from rust.

[0031] The present invention encompasses any substitutions, modifications, equivalent methods, and solutions that are not within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail in the preferred embodiments of the present invention above, but those skilled in the art can fully understand the present invention without these detailed descriptions.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A sludge automatic reflux device for sewage treatment, characterized in that: The invention comprises a rotating drum (1) and a sludge pump (11), wherein an air stripping mechanism for realizing sludge reflux operation is provided in the rotating drum (1), a collecting funnel (2) is fixedly connected to the lower end of the collecting funnel (2), an inverting funnel (3) is fixedly connected to the lower end of the inverting funnel (3), a collecting box (8) is fixedly connected to the lower end of the collecting box (8), a circular plate is provided at the lower end of the collecting box (8), a telescopic cylinder (5) is fixed at the center position of the upper surface of the circular plate, a rubber plug (4) is fixed at the telescopic end of the telescopic cylinder (5), a guide plate (6) is fixedly connected to the lower edge position of the rubber plug (4), the guide plate (6) is in the shape of an inverted funnel, and the lower end of the guide plate (6) is fixedly connected to the upper end of the collecting box (8). There is an isolation cover (7), and the bottom of the inner wall of the collecting box (8) is fixedly connected to an annular partition (9), the inner wall of the partition (9) is in contact with the outer wall of the isolation cover (7), and the height of the partition (9) is equal to the height of the isolation cover (7). The outer wall of the collecting box (8) is fixedly connected to a discharge pipe (10), and one end of the discharge pipe (10) is fixedly installed with the input end of the sludge pump (11). When the telescopic end of the telescopic cylinder (5) is retracted to the shortest position, the connection position of the guide plate (6) and the isolation cover (7) is flush with the partition (9). When the telescopic end of the telescopic cylinder (5) is extended to the longest position, the outer walls of the rubber stopper (4) and the guide plate (6) are both in contact with the inner wall of the inverted funnel (3).

2. The automatic sludge reflux device for sewage treatment according to claim 1, characterized in that: The air stripping mechanism comprises a mud guide pipe (13) and an aerator (12). A middle pipe (14) is fixed to the outer wall of the vertical section of the mud guide pipe (13) located at the center position inside the middle rotating drum (1). A feed pipe (15) for introducing sewage is passed through the side wall of the middle pipe (14). The feed pipe (15) passes through the upper end of the side wall of the middle rotating drum (1). The upper end of the middle pipe (14) is sealed at the connection position with the mud guide pipe (13). The lower end of the middle pipe (14) passes through the aerator (12) and is fixedly connected to a diffusion hopper. The lower end of the mud guide pipe (13) is close to the collecting drain. The bottom of the bucket (2), the upper end of the rotating cylinder (1) is penetrated and fixed with a ventilation mounting block (18), the turning end of the mud guide pipe (13) is penetrated and fixed inside the ventilation mounting block (18), and the other end of the mud guide pipe (13) is penetrated through the upper end of the side wall of the rotating cylinder (1) for draining sludge, the lower end of the ventilation mounting block (18) is provided with a plurality of ventilation holes, the upper end of the ventilation mounting block (18) is penetrated and connected with a connecting pipe, one end of the connecting pipe is fixedly installed with a vent (17), and the upper end of the side wall of the rotating cylinder (1) is fixedly penetrated with a water outlet pipe (16) for draining clean water.

3. The automatic sludge reflux device for sewage treatment according to claim 1, characterized in that: The rubber stopper (4) is in the shape of a truncated cone.

4. The automatic sludge reflux device for sewage treatment according to claim 3, characterized in that: The outer surface of the guide plate (6) is on the extension line of the outer surface of the rubber stopper (4).

5. The automatic sludge reflux device for sewage treatment according to claim 2, characterized in that: One end of the water outlet pipe (16) located outside the rotating drum (1) is bent downward.

6. The automatic sludge reflux device for sewage treatment according to claim 2, characterized in that: One end of the mud guide pipe (13) located outside the middle rotating drum (1) is bent downward.

7. The automatic sludge reflux device for sewage treatment according to claim 2, characterized in that: One end of the feed pipe (15) located outside the rotating cylinder (1) is bent downward.

8. The automatic sludge reflux device for sewage treatment according to claim 1, characterized in that: Multiple groups of supporting legs are fixed to the outer wall of the rotating cylinder (1) near the lower end.

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