A multi-cycle internal cyclone aerobic granular sludge screening and regeneration system

Abstract

The present invention provides a multi-cycle internal vortex aerobic granular sludge screening and regeneration system, which relates to the technical field of sewage biological treatment. A multi-cycle internal vortex aerobic granular sludge screening and regeneration system is provided, which is used in the technical field of sewage biological treatment. This system is mainly used at the rear end of an aerobic granular sludge reactor. When the granular sludge and flocculent sludge mixed in the reactor are discharged with water and enter the circulation pool, they are driven by the circulation drive member to pass through the vortex cylinder and then through the filter element to return to the bottom of the circulation pool to complete the circulation. At the same time, the filter element can effectively filter and separate the granular sludge, which can be returned to the front reactor through the output component for subsequent recycling and use, completing the use cycle of the granular sludge. In addition, the mixing circulation component can also send the excess mixed liquid accumulated on the upper part of the filter element back to the circulation pool to realize multi-stage circulation, and finally realize the recycling and regeneration of the granular sludge and the output of the clean water flow after treatment.

Description

Technical Field

[0001] The invention relates to the technical field of sewage biological treatment, in particular to a multi-circulation internal cyclone aerobic granular sludge screening and regeneration system. Background Art

[0002] Aerobic granular sludge technology is a new type of wastewater treatment technology with good sedimentation performance and high sludge concentration. It can better withstand high organic loads, toxic and harmful substances, shock loads, etc. It is gaining more attention in the field of sewage and wastewater treatment. The formation mechanism of aerobic granular sludge is complex, involving physical, chemical and biological interactions. The general formation process can be regarded as the aggregation of organisms formed by the self-fixation of microorganisms under certain fluid dynamics, selection pressure and other conditions. In the process of sewage treatment, aerobic granular sludge is prone to granular sludge disintegration to form flocs, resulting in poor sewage treatment effect. Therefore, how to maintain a reasonable concentration of sludge particles in the reactor to ensure the continuous and stable process of sewage purification treatment has become a problem to be solved. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a multi-cycle internal cyclone aerobic granular sludge screening and regeneration system to solve the problems in the background technology.

[0004] In order to achieve the above-mentioned and other related purposes, the present invention provides a multi-cycle internal cyclone aerobic granular sludge screening and regeneration system, comprising:

[0005] A circulation pool, the top of which is closed;

[0006] A cyclone cylinder, the cyclone cylinder is vertically placed in the circulation pool, a feed inlet is provided at the bottom of the cyclone cylinder, and a discharge outlet is provided at the top of the cyclone cylinder;

[0007] A circulation drive component, which is installed at the feed inlet and delivers the mixed liquid in the circulation pool into the cyclone cylinder through the feed inlet;

[0008] A filter element, wherein the filter element is installed around the outer side of the discharge port, and part of the mixed liquid overflows from the discharge port and flows back to the bottom of the circulation pool after passing through the filter element;

[0009] A mixing circulation component, the mixing circulation component comprising a first circulation component and a second circulation component, the first circulation component and the second circulation component are respectively arranged on both sides of the circulation pool and are respectively connected to the circulation pool;

[0010] An output component is connected to the circulation pool and is used to send out the regenerated aerobic granular sludge and filtered clean water.

[0011] Optionally, the first circulation component includes a first reflux pump, a first pipeline, a second pipeline and a third pipeline, the first reflux pump is provided with a first water inlet, a second water inlet and a first water outlet, the first water inlet is connected to the first pipeline, one end of the second pipeline is connected to the first water outlet, the other end of the second pipeline is a first water spray end, the first water spray end passes through the circulation pool and is connected to the feed port, and the first water spray end is provided with a first nozzle;

[0012] The second circulation component includes a second reflux pump, a fourth pipeline and a fifth pipeline. The second reflux pump is provided with a third water inlet and a second water outlet. One end of the fourth pipeline is connected to the second water outlet. The other end of the fourth pipeline is a second water spray end. The second water spray end passes through the circulation pool and is connected to the feed port at the bottom of the cyclone. The second water spray end is provided with a second nozzle.

[0013] Optionally, the first nozzle and the second nozzle are arranged obliquely at the feed inlet, and the inclination directions of the first nozzle and the second nozzle are opposite, and the mixed liquid sprayed by the first nozzle and the second nozzle at the feed inlet forms a swirl state.

[0014] Optionally, a top baffle is provided on the top of the circulation pool, and the top baffle is a ring-shaped structure, and the top baffle is located around the outer side of the discharge port.

[0015] Optionally, the circulation pool is provided with a granular sludge return port, a first mixed liquor return port, a second mixed liquor return port and a water outlet, and the output assembly includes a granular sludge return pipe and a water outlet pipe;

[0016] The granular sludge return port and the first mixed liquor return port are located on the same side of the first reflux pump, and the position of the first mixed liquor return port is higher than that of the granular sludge return port, the granular sludge return port is connected to the position of the outlet end of the filter element, a granular sludge return pipe is provided outside the circulation tank, the granular sludge return pipe is connected to the granular sludge return port, one end of the third pipe is connected to the first mixed liquor return port, and the other end of the third pipe is connected to the second water inlet;

[0017] The water outlet and the second mixed liquid reflux port are located on the same side of the second reflux pump, and the position of the water outlet is higher than the position of the second mixed liquid reflux port, one end of the fifth pipe is connected to the second mixed liquid reflux port, and the other end of the fifth pipe is connected to the third water inlet, and a water outlet pipe is provided outside the circulation pool, and the water outlet pipe is connected to the water outlet.

[0018] Optionally, a water outlet weir is further provided in the circulation pool, and the water outlet weir and the water outlet are located at the same horizontal height.

[0019] Optionally, a sewage pipe is provided at the bottom of the circulation pool;

[0020] The water outlet pipe is provided with a first switch valve, and the sewage discharge pipe is provided with a second switch valve.

[0021] Optionally, a sloping wall is provided at the bottom of the circulation pool, and the space inside the circulation pool gradually becomes smaller from top to bottom.

[0022] Optionally, the cyclone cylinder is a conical cylinder, and the diameter of the feed port of the cyclone cylinder is smaller than the diameter of the discharge port.

[0023] Optionally, the circulation driving member is an aeration device;

[0024] The filter element is a filter screen, and the mesh size of the filter screen is less than 1 mm.

[0025] As described above, the multi-cycle internal cyclone aerobic granular sludge screening and regeneration system of the present invention has at least the following beneficial effects:

[0026] The present invention provides a multi-circulation internal cyclone aerobic granular sludge screening and regeneration system, which is used in the field of sewage biological treatment technology. This system is mainly used at the rear end of the aerobic granular sludge reactor. When the granular sludge and flocculent sludge mixed in the reactor are discharged with water and enter the circulation pool, they are driven by the circulation drive to pass through the cyclone cylinder and then through the filter element to return to the bottom of the circulation pool to complete the circulation. At the same time, the filter element can effectively filter and separate the granular sludge, which can be returned to the front reactor through the output component for subsequent recycling and use, completing the use cycle of the granular sludge. In addition, the mixing circulation component can also send the excess mixed liquid accumulated on the upper part of the filter element back to the circulation pool to realize multi-stage circulation, and finally realize the recycling and regeneration of the granular sludge and the output of the clean water flow after treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It shows the overall layout of a multi-cycle internal cyclone aerobic granular sludge screening and regeneration system of the present invention;

[0028] Figure 2 It is a top view schematic diagram showing the arrangement of the first nozzle and the second nozzle at the bottom of the cyclone tube in the present invention. DETAILED DESCRIPTION

[0029] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0030] See also Figure 1 to Figure 2 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0031] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0032] See also Figure 1 The present invention provides a multi-circulation inner cyclone aerobic granular sludge screening and regeneration system, comprising a circulation pool 1, a cyclone tube 2, a circulation drive 3, a filter 4, a mixing circulation component and an output component, wherein the top of the circulation pool 1 is closed; the cyclone tube 2 is vertically placed in the circulation pool 1, a feed port is provided at the bottom of the cyclone tube 2, and a discharge port is provided at the top of the cyclone tube 2; the circulation drive 3 is installed at the feed port, and the circulation drive 3 sends the mixed liquid in the circulation pool 1 into the cyclone tube 2 through the feed port; the filter 4 is installed around the outer side of the discharge port, and part of the mixed liquid overflows from the discharge port and flows back to the bottom of the circulation pool 1 after passing through the filter 4; the mixing circulation component comprises a first circulation component and a second circulation component, and the first circulation component and the second circulation component are respectively arranged on both sides of the circulation pool 1 and are respectively connected to the circulation pool 1; the output component is connected to the circulation pool 1, and the output component is used to send out the regenerated aerobic granular sludge and filtered clean water.

[0033] The present invention provides a multi-circulation internal cyclone aerobic granular sludge screening and regeneration system, which is used in the field of sewage biological treatment technology. This system is mainly used at the rear end of the aerobic granular sludge reactor. When the granular sludge and flocculent sludge mixed in the reactor are discharged with water and enter the circulation pool 1, they are driven by the circulation drive 3 to pass through the cyclone cylinder 2 and then through the filter element 4 to return to the bottom of the circulation pool 1 to complete the circulation. At the same time, the filter element 4 can effectively filter and separate the granular sludge, which can be returned to the front reactor through the output component for subsequent recycling and use, completing the use cycle of the granular sludge. In addition, the mixing circulation component can also send the excess mixed liquid accumulated on the upper part of the filter element 4 back to the inside of the circulation pool 1 to realize multi-stage circulation, and finally realize the recycling and regeneration of the granular sludge and the output of the clean water flow after treatment.

[0034] In this embodiment, please refer to Figure 1 and Figure 2The first circulation component includes a first reflux pump 5, a first pipeline 6, a second pipeline 7 and a third pipeline 8. The first reflux pump 5 is provided with a first water inlet, a second water inlet and a first water outlet. The first water inlet is connected to the first pipeline 6, one end of the second pipeline 7 is connected to the first water outlet, and the other end of the second pipeline 7 is a first water spray end. The first water spray end passes through the circulation pool 1 and is connected to the feed port. The first water spray end is provided with a first nozzle 9; the second circulation component includes a second reflux pump 10, a fourth pipeline 11 and a fifth pipeline 12. The second reflux pump 10 is provided with a third water inlet and a second water outlet. One end of the fourth pipeline 11 is connected to the second water outlet, and the other end of the fourth pipeline 11 is a second water spray end. The second water spray end passes through the circulation pool 1 and is connected to the feed port at the bottom of the cyclone 2. A second nozzle 13 is provided on the second water spray end. The first nozzle 9 and the second nozzle 13 are tilted at the feed port, and the tilt directions of the first nozzle 9 and the second nozzle 13 are opposite, and the mixed liquid sprayed by the first nozzle 9 and the second nozzle 13 at the feed port forms a swirl state. In this embodiment, the mixed liquid containing granular sludge and flocculent sludge discharged from the front-end reactor flows into the first reflux pump 5 through the first pipe 6, and then is pumped into the circulation pool 1 through the first reflux pump 5, and the second reflux pump 10 also circulates at the same time. At the same time, because the first nozzle 9 and the second nozzle 13 are tilted at the feed port, and the first nozzle 9 and the second nozzle 13 are tilted in opposite directions, an upward vortex can be formed at the feed port, and the water flow is driven upward by the circulation drive 3. Optionally, the circulation drive 3 is an aeration device, and the aeration device can be an annular aeration device. The aeration device can aerate continuously. When aerating, the aeration device will form a negative pressure below the aeration device and form bubbles flowing upward. Driven by the rising bubbles, the sieved small granular sludge will be , flocculent sludge and water are lifted into the middle cyclone 2. Under the dual effects of cyclone and rising bubbles, flocculent sludge is squeezed and collided with the granular sludge with smaller particle size after wear, and reunited to form granular sludge with larger particle size. After rising to the top of cyclone 2, it spreads around and contacts the filter 4 downward. Optionally, the filter 4 can use a filter screen with a mesh size of less than 1mm. Granular sludge with a particle size greater than 1mm is intercepted and refluxed to the front reactor. Granular sludge with a particle size less than 1mm and flocculent sludge continue to settle to the bottom through the filter screen. The annular aeration device will form a negative pressure under the aeration device during aeration, and the screened small particle sludge, flocculent sludge and water are lifted into the middle cyclone 2, and the cyclone regeneration of the granular sludge is performed again. In this way, a convection flow state with rising in the middle and settling around is formed in the circulation pool 1, which is conducive to the recycling and regeneration of granular sludge.

[0035] In this embodiment, please refer to Figure 1 The circulation pool 1 is provided with a granular sludge return port, a first mixed liquor return port, a second mixed liquor return port and a water outlet, and the output assembly includes a granular sludge return pipe 14 and a water outlet pipe 15; the granular sludge return port and the first mixed liquor return port are located on the same side of the first reflux pump 5, and the position of the first mixed liquor return port is higher than the position of the granular sludge return port, the granular sludge return port is connected to the position of the outlet end of the filter element 4, and the outside of the circulation pool 1 is provided with a granular sludge return pipe 14, and the granular sludge return pipe 14 and the granular sludge return pipe 15 are connected to the outlet end of the filter element 4. The reflux ports are connected, one end of the third pipe 8 is connected to the first mixed liquid reflux port, and the other end of the third pipe 8 is connected to the second water inlet; the water outlet and the second mixed liquid reflux port are located on the same side of the second reflux pump 10, and the position of the water outlet is higher than the position of the second mixed liquid reflux port, one end of the fifth pipe 12 is connected to the second mixed liquid reflux port, and the other end of the fifth pipe 12 is connected to the third water inlet, and an outlet pipe 15 is provided outside the circulation pool 1, and the outlet pipe 15 is connected to the outlet. During the circulation process, the mixed liquid can not only flow back to the bottom of the circulation pool 1 through the filter element 4 to complete the circulation, but also flow back to the first reflux pump 5 and the second reflux pump 10 from the first mixed liquid reflux port and the second mixed liquid reflux port respectively to circulate again, so that the overall filtering and regeneration effect of the circulation is better.

[0036] In this embodiment, please refer to Figure 1 The circulation pool 1 is also provided with a water outlet weir 16, and the water outlet weir 16 and the water outlet are at the same horizontal height. The top of the circulation pool 1 is provided with a top baffle 17, and the top baffle 17 is a ring-shaped structure, and the top baffle 17 is located around the outer side of the discharge port. During the circulation process, when the mixed liquid flows out from the top of the cyclone 2 and spreads around, the bottom baffle can be used to enclose the overflowed mixed liquid to prevent it from spilling, and at the same time, it can also prevent the influence of water turbulence, so that the sludge around the water outlet weir 16 can be settled to ensure the clarification of the effluent.

[0037] In this embodiment, please refer to Figure 1 A sewage pipe 18 is provided at the bottom of the circulation pool 1; a first switch valve 19 is provided on the outlet pipe 15, and a second switch valve 20 is provided on the sewage pipe 18. The sewage pipe 18 is provided at the bottom for the purpose of discharging the sewage waste through the sewage pipe 18 at the bottom when the circulation reaches a certain level and the granular sludge cannot be regenerated, and the clean water after circulation filtration is discharged from the outlet pipe 15.

[0038] In this embodiment, please refer to Figure 1, an inclined wall 21 is provided at the bottom of the circulation pool 1, and the space inside the circulation pool 1 gradually decreases from top to bottom. The cyclone tube 2 is a conical tube, and the diameter of the feed port of the cyclone tube 2 is smaller than the diameter of the discharge port. The bottom wall of the circulation pool 1 is provided to form an area with a gradually decreasing size from top to bottom in the bottom storage space of the circulation pool 1, so that the mixed sludge water will be more concentrated at the bottom of the circulation pool 1 during the reflux process, which is more convenient for the circulation drive 3 to carry out centralized flow pushing. The cyclone tube 2 is selected to be a conical tube because the diameter of the feed port is small, and its flow rate is faster, which is more conducive to the circulation of the mixed sludge water; and the diameter of the discharge port is large, which is more conducive to the mixed sludge water flowing out when it is dispersed to the filter elements 4 at different positions, making the filtration more uniform.

[0039] In summary, the present invention provides a multi-cycle internal cyclone aerobic granular sludge screening and regeneration system, which is used in the field of sewage biological treatment technology. This system is mainly used at the rear end of the aerobic granular sludge reactor. When the granular sludge and flocculent sludge mixed in the reactor are discharged with water and enter the circulation pool, they are driven by the circulation drive to pass through the cyclone tube and then through the filter element to return to the bottom of the circulation pool to complete the circulation. At the same time, the filter element can effectively filter and separate the granular sludge, which can be returned to the front reactor through the output component for subsequent recycling and use, completing the use cycle of the granular sludge. In addition, the mixing circulation component can also send the excess mixed liquid accumulated on the upper part of the filter element back to the circulation pool to realize multi-stage circulation, and finally realize the recycling and regeneration of the granular sludge and the output of the clean water flow after treatment. Therefore, the present invention effectively overcomes the various shortcomings in the prior art and has a high industrial utilization value.

[0040] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A multi-cycle internal cyclone aerobic granular sludge screening and regeneration system, characterized in that: include: A circulation pool, the top of which is closed; A cyclone cylinder, the cyclone cylinder is vertically placed in the circulation pool, a feed inlet is provided at the bottom of the cyclone cylinder, and a discharge outlet is provided at the top of the cyclone cylinder; A circulation drive component, which is installed at the feed inlet and delivers the mixed liquid in the circulation pool into the cyclone cylinder through the feed inlet. The circulation drive component is an aeration device; A filter element, the filter element is installed around the outer side of the discharge port, and part of the mixed liquid overflows from the discharge port and flows back to the bottom of the circulation pool after passing through the filter element. The filter element is a filter screen, and the mesh size of the filter screen is less than 1 mm; A mixing circulation component, the mixing circulation component comprising a first circulation component and a second circulation component, the first circulation component and the second circulation component are respectively arranged on both sides of the circulation pool and are respectively connected to the circulation pool; An output component is connected to the circulation pool and is used to send out the regenerated aerobic granular sludge and filtered clean water.

2. The multi-cycle internal cyclone aerobic granular sludge screening and regeneration system according to claim 1, characterized in that: The first circulation assembly comprises a first reflux pump, a first pipeline, a second pipeline and a third pipeline, the first reflux pump is provided with a first water inlet, a second water inlet and a first water outlet, the first water inlet is connected to the first pipeline, one end of the second pipeline is connected to the first water outlet, the other end of the second pipeline is a first water spray end, the first water spray end passes through the circulation pool and is connected to the feed port, and the first water spray end is provided with a first nozzle; The second circulation component includes a second reflux pump, a fourth pipeline and a fifth pipeline. The second reflux pump is provided with a third water inlet and a second water outlet. One end of the fourth pipeline is connected to the second water outlet. The other end of the fourth pipeline is a second water spray end. The second water spray end passes through the circulation pool and is connected to the feed port at the bottom of the cyclone. The second water spray end is provided with a second nozzle.

3. The multi-cycle internal cyclone aerobic granular sludge screening and regeneration system according to claim 2 is characterized by: The first nozzle and the second nozzle are arranged obliquely at the feed inlet, and the first nozzle and the second nozzle are inclined in opposite directions, and the mixed liquid sprayed by the first nozzle and the second nozzle at the feed inlet forms a swirl state.

4. The multi-cycle internal cyclone aerobic granular sludge screening and regeneration system according to claim 1, characterized in that: A top baffle is provided on the top of the circulation pool. The top baffle is a ring-shaped structure and is located around the outer side of the discharge port.

5. The multi-cycle internal cyclone aerobic granular sludge screening and regeneration system according to claim 2, characterized in that: The circulation pool is provided with a granular sludge return port, a first mixed liquid return port, a second mixed liquid return port and a water outlet, and the output component includes a granular sludge return pipe and a water outlet pipe; The granular sludge return port and the first mixed liquor return port are located on the same side of the first reflux pump, and the position of the first mixed liquor return port is higher than that of the granular sludge return port, the granular sludge return port is connected to the position of the outlet end of the filter element, a granular sludge return pipe is provided outside the circulation tank, the granular sludge return pipe is connected to the granular sludge return port, one end of the third pipe is connected to the first mixed liquor return port, and the other end of the third pipe is connected to the second water inlet; The water outlet and the second mixed liquid reflux port are located on the same side of the second reflux pump, and the position of the water outlet is higher than the position of the second mixed liquid reflux port, one end of the fifth pipe is connected to the second mixed liquid reflux port, and the other end of the fifth pipe is connected to the third water inlet, and a water outlet pipe is provided outside the circulation pool, and the water outlet pipe is connected to the water outlet.

6. The multi-cycle internal cyclone aerobic granular sludge screening and regeneration system according to claim 5, characterized in that: A water outlet weir is also provided in the circulation pool, and the water outlet weir and the water outlet are located at the same horizontal height.

7. The multi-cycle internal cyclone aerobic granular sludge screening and regeneration system according to claim 5, characterized in that: A sewage pipe is provided at the bottom of the circulation pool; The water outlet pipe is provided with a first switch valve, and the sewage discharge pipe is provided with a second switch valve.

8. The multi-cycle internal cyclone aerobic granular sludge screening and regeneration system according to claim 1, characterized in that: The bottom of the circulation pool is provided with an inclined wall, and the space inside the circulation pool gradually becomes smaller from top to bottom.

9. The multi-cycle internal cyclone aerobic granular sludge screening and regeneration system according to claim 1, characterized in that: The cyclone tube is a conical tube, and the diameter of the feed port of the cyclone tube is smaller than the diameter of the discharge port.

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