Aeration system based on aerobic granular sludge

Abstract

The present invention relates to the technical field of sewage treatment, and in particular to an aeration system based on aerobic granular sludge, comprising: a plurality of collectors arranged at a plurality of collection positions of a biochemical pool, a plurality of actuators arranged at a plurality of execution positions of the biochemical pool, and a control core for issuing water flow regulation instructions in response to a particle size parameter, and generating corresponding sludge regulation instructions in response to a surge parameter; the state of sludge in the biochemical pool and the stratified state of sewage in the biochemical pool are monitored in real time, and a plurality of temporary processing instructions are generated according to the monitoring results of the biochemical pool, so that the feedback efficiency is effectively improved, and the biochemical pool with sludge abnormality can be reactivated in time, thereby effectively improving the stability of the biochemical pool.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to an aeration system based on aerobic granular sludge. Background Art

[0002] In recent years, a series of innovative aeration technologies have emerged in the field of aerobic granular sludge process, which have significantly improved the efficiency of sewage treatment. Among them, the application of separated aeration self-circulation technology in continuous aerobic granular sludge process is particularly prominent. This technology achieves a circulation multiplication rate of several times by precisely controlling the volume ratio of the aeration tower and the reaction tower, while ensuring ideal fluid dynamic conditions in the reactor. Studies have shown that this optimized design not only enhances the mixed mass transfer effect of the system, but also increases the denitrification efficiency by more than 30%, providing a new solution for the treatment of high-concentration ammonia nitrogen wastewater.

[0003] At the same time, the application of self-circulating upflow fluidized bed process in continuous aerobic granular sludge treatment has also made breakthrough progress. This process adopts a zoned aeration strategy and realizes multiple self-circulation of materials in the reactor by precisely controlling the aeration intensity and gas-water ratio. This unique operation mode not only promotes the rapid formation of granular sludge, but also significantly enhances its structural stability. Experimental data show that compared with traditional processes, the use of self-circulating upflow fluidized bed process can increase the average particle size of granular sludge by about 40% and the sedimentation rate by more than 50%, providing reliable guarantee for the stable operation of sewage treatment plants.

[0004] Chinese Patent Publication No.: CN118724285B. A sewage treatment device and method based on continuous flow aerobic granular sludge is disclosed. The sewage treatment device includes: an anaerobic tank and an aerobic tank. A water inlet pipe is arranged at the bottom of the side wall of the aerobic tank. The first mud-water mixture in the anaerobic tank enters the aerobic tank through the water inlet pipe; an aeration device and at least one impactor are arranged in the aerobic tank. The aeration device is arranged at the bottom of the aerobic tank and is located below the water inlet pipe. The impactors are all located above the water inlet pipe; the aerobic tank is also provided with a reflux port. The second mud-water mixture flows back to the anaerobic tank through the reflux port, wherein the second mud-water mixture is formed by enriching the aerobic granular sludge in the aerobic tank with the first mud-water mixture. The impactor is integrated in the aerobic tank. Combined with the gravity / water flow driving force and shear force caused by aeration, the microorganisms and sludge contact and collide with each other in the impactor to form stable and mature aerobic granular sludge. Through the cyclic reaction of the anaerobic tank and the aerobic tank, the sewage treatment effect is improved.

[0005] It can be seen that when the aerobic granular sludge aeration method is operated for a long time, the aeration system stability will be reduced due to the inability to respond quickly to the growth of sludge and changes in water quality. Summary of the invention

[0006] To this end, the present invention provides an aeration system based on aerobic granular sludge to overcome the problem in the prior art that the stability of the aeration system is reduced due to the growth of sludge and changes in water quality, and the inability to respond quickly. At the same time, the system also injects oxygen into the sewage to increase the dissolved oxygen content in the water, thereby accelerating the oxidation rate of microbial degradation of pollutants, effectively improving the reaction rate of the aeration system while improving the stability of the aeration system.

[0007] To achieve the above object, the present invention provides an aeration system based on aerobic granular sludge, which uses aeration to drive sludge and water flow in a biochemical pool, including:

[0008] A plurality of collectors are arranged at a plurality of collection positions of the biochemical pool, and are used to collect the particle size parameters and surge parameters of the biochemical pool according to a preset period;

[0009] A control core, which is connected to each collector, and is used to issue a water flow adjustment instruction in response to the particle size parameter, and to generate a corresponding sludge adjustment instruction in response to the surge parameter;

[0010] A plurality of actuators, which are respectively connected to the control core and arranged at a plurality of execution positions of the biochemical pool, include:

[0011] A plurality of path control terminals for responding to the water flow regulation instruction and controlling the water flow state of the biochemical pool, and,

[0012] A plurality of gushing control terminals for responding to the sludge adjustment instruction and controlling the sludge state of the biochemical pool;

[0013] Among them, for a single preset cycle, it includes a rapid response state in the early stage, a maintenance state in the middle stage, and a closing state in the final stage.

[0014] Furthermore, the control core is provided with a constant water flow image and a water flow similarity threshold.

[0015] For a single preset cycle, the control core fits the water flow state with the water flow image, and controls the path control terminal to adjust the water flow direction in response to fitting abnormalities;

[0016] The fitting anomaly is that the fitting result is not greater than the water flow similarity threshold.

[0017] Furthermore, the control core is provided with a normal sludge particle size range.

[0018] For the single preset cycle, the control core responds that the sludge state is not in the sludge particle size range, and controls the gushing control terminal to increase the gushing frequency.

[0019] Furthermore, the plurality of collectors include:

[0020] A plurality of particle size collectors are arranged at a plurality of collection positions at different heights, and at least include a collection position on the water surface and a collection position in the water;

[0021] A plurality of surge collectors, which are configured as a plurality of impeller blades and are arranged at a plurality of collection positions in the water and at the bottom of the pool;

[0022] Among them, for a single height, each acquisition position forms a rectangular array;

[0023] For a plurality of collection positions of a single biochemical pool, at least corresponding heights including those on the water surface, in the water and at the pool bottom are set, and the projections of the collection positions at the various heights on the horizontal plane overlap.

[0024] Further, for a single path control terminal, it is configured to include a guide plate and a rotating shaft for controlling the angle of the guide plate;

[0025] The rotating shaft is used to rotate in response to the water flow adjustment instruction and drive the guide plate to move to a corresponding water flow adjustment angle.

[0026] Furthermore, the path control terminal is also provided with a counter-regulation strategy. For the water flow adjustment angle of a single water flow adjustment instruction, the path control terminal sequentially adjusts the path control terminal within the preset period, including:

[0027] In the fast response state, rotate to a corresponding position not less than the water flow adjustment angle;

[0028] Rotate to the water flow adjustment angle in the maintained state;

[0029] In the closing state, rotate to a corresponding position not greater than the water flow adjustment angle;

[0030] The water flow adjustment angle is the angle between the normal vector of the real-time water flow direction and the normal vector of the normal water flow direction projected on the horizontal plane.

[0031] Furthermore, the particle size parameter at least includes the particle size distribution state at each depth of the biochemical pool, and the surge parameter at least includes the real-time rising flow rate of the biochemical pool.

[0032] Furthermore, the gushing control terminal is also provided with an intermittent gushing strategy, which includes:

[0033] The particle collector that sprays onto the water surface at a preset high frequency and a preset low pressure collects the corresponding biochemical pool surface image;

[0034] Stop the spraying and set the interval time;

[0035] The particle collector that sprays onto the water surface at a preset low frequency and a preset high pressure collects the corresponding biochemical pool surface image.

[0036] Furthermore, the water flow state at least includes the flow direction of the water in the biochemical pool, and the sludge state at least includes the particle size of the sludge in the biochemical pool.

[0037] Furthermore, the control core is also provided with a periodic regulation strategy, and in response to the completion of the water flow regulation and / or sludge regulation, a corresponding preset period is reset.

[0038] Compared with the prior art, the beneficial effect of the present invention lies in that, by setting up a number of collectors, a number of actuators and a control core, the state of sludge in the biochemical pool and the stratification state of sewage in the biochemical pool are monitored in real time, and a number of temporary processing instructions are generated according to the monitoring results of the biochemical pool. While effectively improving the feedback efficiency, the biochemical pool with sludge abnormalities can be reactivated in time, thereby effectively improving the stability of the biochemical pool.

[0039] Furthermore, the normal water flow image is used to determine several water surface flow directions of the biochemical pool under normal working conditions, and a water flow similarity threshold is set so that the water flow state of the biochemical pool can be monitored within a certain range. While avoiding interference with the development of aerobic granular sludge in the biochemical pool as much as possible, the accuracy of monitoring the water flow state in the biochemical pool is improved, and by observing the water flow, it is determined whether the biochemical pool in the underwater state that is difficult to observe can operate smoothly, thereby effectively improving the stability of the biochemical pool.

[0040] Furthermore, by identifying the particle size of sludge particles, it is determined whether the operation of the biochemical pool system will be affected by the sludge particle size being too large or the agglomerates being too large in a single preset cycle. By increasing the spraying frequency, the sludge or sludge agglomerates are sheared by air or water flow so that they can operate at an appropriate particle size, thereby further improving the stability of the biochemical pool.

[0041] Furthermore, by setting corresponding particle size collectors at different heights in the biochemical pool, the flow conditions on the water surface, underwater and bottom of the biochemical pool can be monitored, and by overlapping the cameras, the specific conditions of the water flow corresponding to a single position mapped on the bottom of the water can be effectively observed, such as the surface flow velocity is lower than that of the bottom, the surface flow direction is different from the bottom flow direction, or the flow direction of the pool bottom is longitudinal after gushing, etc. According to different conditions, the amplitude by which the corresponding guide plate should be rotated can be analyzed to guide the water flow in a better direction, thereby further improving the stability of the biochemical pool.

[0042] Furthermore, by setting up a counter-regulation strategy, when moving the guide plate, its rotation amplitude is increased and then restored to the corresponding adjustment direction, which effectively avoids the problem of changes in water flow direction due to water flow inertia. By gradually ending, the corresponding path control terminal is installed in a suitable position following the real-time water flow state to maintain the stability of the water flow, which can further improve the stability of the biochemical pool.

[0043] Furthermore, by collecting the particle size distribution state at each depth, the size state and flow state of the sludge at different positions are observed, and intermittent spraying is performed according to the sludge size, thereby effectively resisting the aggregation state caused by the relative stillness of the sludge in a continuous motion state, and keeping the sludge in the biochemical pool stable in size, thereby further improving the stability of the biochemical pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the structure of the aeration system based on aerobic granular sludge of the present invention.

[0045] Figure 2 This is a vertical distribution diagram of a collector according to an embodiment of the present invention;

[0046] Figure 3 This is a horizontal distribution diagram of a collector according to an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the layout of the gushing control terminal according to an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the layout of the gushing control terminal and the collector according to an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram of the structure of a path control terminal according to an embodiment of the present invention;

[0050] Among them: 1, water flow direction; 2, collector horizontal projection position; 3, path control terminal; 31, direction shaft; 32, rigid guide plate; 33, flexible guide plate; 4, gushing control terminal; 5, gushing pipe. DETAILED DESCRIPTION

[0051] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0053] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0054] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] To help you understand this plan, the following special terms are explained:

[0056] DO (Dissolved Oxygen): Molecular oxygen in the air dissolved in water is called dissolved oxygen. The content of dissolved oxygen in water is closely related to the partial pressure of oxygen in the air and the temperature of the water. Under natural conditions, the oxygen content in the air does not change much, so the water temperature is the main factor. The lower the water temperature, the higher the content of dissolved oxygen in the water. Molecular oxygen dissolved in water is called dissolved oxygen, usually recorded as DO, expressed in milligrams of oxygen per liter of water. The amount of dissolved oxygen in water is an indicator of the self-purification ability of water bodies.

[0057] SS (Suspended Solids): refers to solid matter suspended in water, with a particle size generally ranging from a few to several hundred microns, including inorganic and organic matter insoluble in water, mud, clay, microorganisms, etc. The content of suspended matter in water is one of the indicators to measure the degree of water pollution. Suspended matter is the main cause of water turbidity. Organic suspended matter in water bodies is prone to anaerobic fermentation after sedimentation, which deteriorates water quality.

[0058] Sludge: In this scheme, activated sludge is a general term for microbial communities and the organic and inorganic substances they are attached to. Activated sludge can be divided into aerobic activated sludge and anaerobic granular activated sludge. Activated sludge is mainly used to treat sewage and wastewater. The activated sludge method is an aerobic treatment method that uses suspended microbial flocs to treat organic sewage.

[0059] Aerobic granular sludge: Aerobic granular sludge is granular activated sludge formed by microbial self-agglomeration.

[0060] See also Figure 1 As shown, it is a schematic diagram of the structure of the aeration system based on aerobic granular sludge of the present invention. The aeration system based on aerobic granular sludge uses aeration to drive sludge and water flow in the biochemical pool, including:

[0061] A plurality of collectors are arranged at a plurality of collection positions of the biochemical pool, and are used to collect the particle size parameters and surge parameters of the biochemical pool according to a preset period;

[0062] A control core, which is connected to each collector, for responding to the particle size parameter to issue a water flow regulation instruction, and responding to the surge parameter to generate a corresponding sludge regulation instruction;

[0063] A plurality of actuators are respectively connected to the control core and arranged at a plurality of execution positions of the biochemical pool, including:

[0064] A plurality of path control terminals for responding to water flow regulation instructions and controlling the water flow state of the biochemical pool, and,

[0065] Several gushing control terminals for responding to sludge adjustment instructions and controlling the sludge state of the biochemical pool;

[0066] Among them, for a single preset cycle, it includes a rapid response state in the early stage, a maintenance state in the middle stage, and a closing state in the final stage.

[0067] Specifically, the control core is also provided with a periodic regulation strategy, which responds to the completion of water flow regulation and / or sludge regulation and resets the corresponding preset period.

[0068] By setting up a number of collectors, a number of actuators and a control core, the state of the sludge in the biochemical pool and the stratification state of the sewage in the biochemical pool are monitored in real time, and a number of temporary processing instructions are generated according to the monitoring results of the biochemical pool. While effectively improving the feedback efficiency, the biochemical pool with sludge abnormalities can be reactivated in time, thereby effectively improving the stability of the biochemical pool.

[0069] Embodiment 1:

[0070] In a domestic aerobic granular sludge demonstration project in a sewage treatment plant, an intelligent aeration system was used. The system sets collectors at multiple locations in the biochemical pool to regularly collect the particle size parameters (such as the shape and distribution of granular sludge) and surge parameters (such as rising flow rate) of the biochemical pool. The collector transmits these data to the control core, which issues water flow adjustment instructions based on the particle size parameters to optimize the water flow state in the biochemical pool; at the same time, it generates sludge adjustment instructions based on the surge parameters to control the sedimentation and distribution of sludge.

[0071] The actuator operates according to the instructions of the control core: the path control terminal responds to the water flow regulation instruction, adjusts the aeration intensity and aeration path, and optimizes the mixing and mass transfer efficiency of the water flow; the gushing control terminal controls the sludge return and distribution according to the sludge regulation instruction to ensure the stability and sedimentation performance of the granular sludge. In a single preset cycle, the system is divided into a fast response state (early stage), a maintenance state (mid-term) and a closing state (final stage), corresponding to different aeration intensities and sludge regulation strategies.

[0072] Embodiment 2:

[0073] In a study on urban sewage treatment, a self-circulating upflow granular sludge fluidized bed process was established. This process monitors the particle size parameters (such as the particle size distribution of granular sludge) and surge parameters (such as the rising flow rate and the change of mud-water interface) in the biochemical pool in real time by setting up multiple collectors in the biochemical pool. Based on the collected data, the control core issues water flow regulation instructions to optimize the rising flow rate and self-circulation multiples in the biochemical pool; at the same time, based on the particle size and sedimentation performance of the sludge, it generates sludge regulation instructions to control the stability of the granular sludge and the enrichment of functional microorganisms.

[0074] The path control terminal in the actuator responds to the water flow regulation command, controls the aeration volume and aeration path, and provides good hydraulic shear conditions for the formation of granular sludge; the gushing control terminal adjusts the sludge return and distribution according to the sludge regulation command to ensure the stability of granular sludge and the enrichment of functional microorganisms. In a single preset cycle, the system accurately controls the aeration volume and sludge state through three stages: rapid response, maintenance, and ending.

[0075] Specifically, the control core is equipped with a constant water flow image and a water flow similarity threshold.

[0076] For a single preset cycle, the control core fits the water flow state with the water flow image, and in response to the fitting abnormality, the control path control terminal adjusts the water flow direction;

[0077] Among them, the fitting anomaly is that the fitting result is not greater than the water flow similarity threshold.

[0078] The normal water flow image is used to determine several water surface flow directions of the biochemical pool under normal working conditions, and a water flow similarity threshold is set so that the water flow state of the biochemical pool can be monitored within a certain range. While avoiding interference with the development of aerobic granular sludge in the biochemical pool as much as possible, the accuracy of monitoring the water flow state in the biochemical pool is improved. By observing the water flow, it is determined whether the biochemical pool in the underwater state that is difficult to observe can operate smoothly, thereby effectively improving the stability of the biochemical pool.

[0079] Specifically, the control core is equipped with a constant sludge particle size range.

[0080] For a single preset cycle, the control core responds that the sludge state is not in the sludge particle size range, and controls the gushing control terminal to increase the gushing frequency.

[0081] By identifying the particle size of sludge particles, it is determined whether the operation of the biochemical pool system will be affected by the sludge particle size being too large or the sludge agglomerates being too large in a single preset cycle. By increasing the spraying frequency, the sludge or sludge agglomerates are sheared by air or water flow so that they can operate at an appropriate particle size, thereby further effectively improving the stability of the biochemical pool system.

[0082] For the i-th preset cycle, the control core sets the sludge particle size interval according to the corresponding environmental conditions such as temperature, sunshine intensity, and the corresponding state of the sewage, and at least includes parameters such as DO (dissolved oxygen) and SS (suspended solids). The control core is provided with a first particle size threshold Dα and a second particle size threshold Dβ. For the sludge particle size of the i-th preset cycle, the sludge particle size interval that occupies a larger volume (following a normal distribution) in the cycle is set as Di, and the corresponding maximum particle size is maxDi, and the minimum particle size is minDi.

[0083] If maxDi<Dα, it is determined that the sludge particle size is insufficient;

[0084] If minDi>Dβ, the sludge particle size is judged to be too large;

[0085] Among them, when setting Di, the median of its particle size is taken as the basis, and the corresponding maximum particle size is selected as maxDi and the minimum particle size is selected as minDi following the normal distribution, so that the overall volume of Di is about 70% of the sludge volume that can be monitored.

[0086] It is understandable that when the sludge particle size is too large, the internal mass transfer resistance will be too large, which will eventually lead to a lack of nutrients for the microorganisms inside the aerobic granular sludge, causing the granular sludge to disintegrate. However, when the sludge particle size is too small, it is difficult to form aerobic granular sludge, and the corresponding processing capacity tends to be that of conventional sludge.

[0087] Embodiment 3:

[0088] In the implementation, the control core presets the normal water flow image and similarity threshold, and sets the normal sludge particle size range (100-500μm) as an example. In a single preset cycle, the control core fits the collected water flow state with the normal water flow image. If the fitting result is lower than the similarity threshold (for example, the fitting similarity is 0.6, and the threshold is 0.7), the control path control terminal adjusts the water flow direction and optimizes the aeration path. At the same time, if it is detected that the sludge particle size is not in the preset range (for example, the particle size is 800μm), the control core will issue an instruction to control the gushing control terminal to increase the gushing frequency to promote the formation and stabilization of granular sludge.

[0089] Embodiment 4:

[0090] In implementation, the constant water flow image preset by the control core shows that the water flow velocity should be 2 m-3 m / h under normal circumstances. In a single preset cycle, if the water flow state is abnormally fitted with the constant water flow image (for example, the actual flow rate is 1.5 m / h, which is lower than the similarity threshold), the control core will adjust the water flow direction through the path control terminal to optimize the aeration path. At the same time, the sludge particle size range set by the control core is 150μm-400μm. If the sludge particle size is detected to be lower than 150μm, the gushing control terminal will increase the gushing frequency to promote the formation and stabilization of granular sludge.

[0091] See also Figure 2 As shown, it is a vertical distribution diagram of the collector according to an embodiment of the present invention, including:

[0092] A plurality of particle size collectors are arranged at a plurality of collection positions at different heights, and at least include a collection position on the water surface and a collection position in the water;

[0093] A plurality of surge collectors, which are configured as a plurality of impeller blades and are arranged at a plurality of collection positions in the water and at the bottom of the pool;

[0094] Among them, for a single height, each acquisition position forms a rectangular array;

[0095] For a plurality of collection positions of a single biochemical pool, at least corresponding heights including those on the water surface, in the water and at the pool bottom are set, and the projections of the collection positions at the various heights on the horizontal plane overlap.

[0096] In implementation, the particle size collector may be a laser sensor, or other means may be used for measurement, as long as the particle size at the corresponding position can be measured, which will not be described in detail here;

[0097] In particular, for the same biochemical pool, the particle size collectors arranged thereon may be collectors of different categories, such as: the one arranged on the water surface may be collected by an image acquisition device, and the one arranged under the water surface may be collected by a laser sensor.

[0098] In particular, when the collection period of the particle size collector becomes longer, the corresponding preset period should be increased accordingly.

[0099] See also Figure 3 As shown, it is a horizontal distribution diagram of the collector of the embodiment of the present invention. The water flow direction of the biochemical pool in the figure is from left to right as a whole, and flows from top to bottom or from bottom to top in different grooves. The water flow direction 1 indicates the flow direction of the biochemical pool at each turning position;

[0100] At least one particle size collector or one surge collector is arranged at the collector horizontal projection position 2, and at most three corresponding collectors are arranged at different heights. The collector horizontal projection position 2 does not interfere with the path control terminal 3, and is arranged in a rectangular shape as a whole.

[0101] Specifically, for a single path control terminal, it is configured to include a guide plate and a rotating shaft for controlling the angle of the guide plate;

[0102] The rotating shaft is used to rotate in response to the water flow adjustment instruction and drive the guide plate to move to the corresponding water flow adjustment angle.

[0103] By setting corresponding particle size collectors at different heights in the biochemical pool, the flow conditions on the water surface, underwater and bottom of the biochemical pool are monitored, and by overlapping the cameras, the specific conditions of the water flow corresponding to a single position mapped on the bottom of the water can be effectively observed, such as the surface flow velocity is lower than that of the bottom, the surface flow direction is different from the bottom flow direction, or the flow direction of the pool bottom is longitudinal after gushing, etc. According to different conditions, the amplitude by which the corresponding guide plate should be rotated can be analyzed, so as to guide the water flow in a better direction, thereby further improving the stability of the biochemical pool.

[0104] Specifically, the water flow state at least includes the flow direction of the water in the biochemical pool, and the sludge state at least includes the particle size of the sludge in the biochemical pool.

[0105] Specifically, the gushing control terminal is also equipped with an intermittent gushing strategy, which includes:

[0106] The particle collector that sprays onto the water surface at a preset high frequency and a preset low pressure collects the corresponding biochemical pool surface image;

[0107] Stop the spraying and set the interval time;

[0108] The particle collector that sprays onto the water surface at a preset low frequency and a preset high pressure collects the corresponding biochemical pool surface image.

[0109] By collecting the particle size distribution state at each depth, the size state and flow state of the sludge at different positions are observed, and intermittent spraying is performed according to the sludge size, thereby effectively resisting the aggregation state caused by the relative stillness of the sludge in a continuous motion state, and keeping the sludge in the biochemical pool stable in size, thereby further improving the stability of the biochemical pool.

[0110] In implementation, the depth corresponding to the particle size collector includes at least the water surface, underwater and the bottom of the pool. It should be noted that for the biochemical pool described in this application, under normal working conditions, it is generally believed that the sludge in the pool is fully mixed. Therefore, when using this solution, a particle size collector set on the water surface can be used for observation. When an incompletely mixed state occurs, sampling can be carried out at the underwater and bottom of the pool at that location.

[0111] See also Figure 4 As shown, it is a schematic diagram of the layout of the gushing control terminal of an embodiment of the present invention. In the figure, the gushing control terminal 4 is set at the bottom of the pool, which can be a pipe connected to an air pump or a pipe connected to a water pump. When it is set, the nozzle includes a flippable baffle, which can adjust the gushing direction, and will not be repeated here.

[0112] See also Figure 5 As shown, it is a schematic diagram of the layout of the gushing control terminal and the collector of an embodiment of the present invention. As an optional form, the biochemical pool can be circular, and its layout is shown in the figure. The gushing control terminal 4 is meshed and connected to the corresponding gushing pipes 5. The path control terminal 3 is arranged in a ring to control the flow direction of the nearby biochemical pool.

[0113] Specifically, the nozzle of the gushing control terminal is also provided with a longitudinally arranged baffle that rotates in response to the gushing parameters to control the gushing direction of the gushing control terminal and reduce the flow rate of the gas or water ejected therefrom in the ascending direction.

[0114] In particular, for Figure 4 or Figure 5 In the pipeline, the rotating shaft of the baffle can be set along the gushing pipeline or perpendicular to the pipeline, the baffle can rotate along the rotating shaft, and the rotating shaft can be set at a height corresponding to the pipeline or above the pipeline.

[0115] Specifically, the path control terminal is also provided with a counter-regulation strategy. For the water flow adjustment angle of a single water flow adjustment instruction, the path control terminal sequentially adjusts the path control terminal within a preset period, including:

[0116] In the fast response state, rotate to a corresponding position not less than the water flow adjustment angle;

[0117] Rotate to the water flow adjustment angle in the maintained state;

[0118] In the closing state, rotate to a corresponding position not greater than the water flow adjustment angle;

[0119] The water flow adjustment angle is the angle between the normal vector of the real-time water flow direction and the normal vector of the normal water flow direction projected on the horizontal plane.

[0120] See also Figure 6As shown, it is a schematic diagram of the structure of the path control terminal according to an embodiment of the present invention. In the figure, the direction shaft 31 is used to rotate in response to the command of the control core, so that the rigid guide plate 32 moves and drives the flexible guide plate 33 to move synchronously;

[0121] When in motion, the flexible guide plate 33 can rotate with a delay of a certain period of time to prevent the rigid guide plate 32 from being impacted by the water flow and causing damage to the direction shaft 31;

[0122] In implementation, the rigid guide plate 32 may be a steel plate or a concrete plate, and the flexible guide plate may be a plastic plate or a rubber plate.

[0123] By setting up a counter-regulation strategy, when moving the guide plate, its rotation amplitude is increased and then restored to the corresponding adjustment direction, which effectively avoids the problem of changes in water flow direction due to water flow inertia. By gradually ending, the corresponding path control terminal is installed in a suitable position following the real-time water flow state to maintain the stability of the water flow, which can further improve the stability of the biochemical pool.

[0124] For the jth adjustment, the degree to be adjusted is Aj, and the angle with the current water flow is Ajα. At this time,

[0125] In the fast response state, the water flow is adjusted to the corresponding angle of kAjα+Aj;

[0126] In the maintenance state, adjust the water flow to the position corresponding to Aj;

[0127] In the closing state, the control of the path control terminal is stopped, and the terminal is allowed to rotate freely under the pressure of the water flow while limiting its maximum operating angle to Aj;

[0128] The angle control coefficient k depends on the density of the turbid liquid in the biochemical pool and can generally be taken as 0.5.

[0129] Embodiment 5:

[0130] The constant water flow image preset by the control core shows that the angle between the normal vector of the normal water flow direction and the horizontal plane is 15°. In a single water flow adjustment command, the angle between the normal vector of the real-time water flow direction and the normal vector of the constant water flow direction projected on the horizontal plane is 30°, which exceeds the water flow similarity threshold (20°) and triggers the adjustment command.

[0131] The adjustment strategy of the path control terminal is as follows:

[0132] Quick response state: the shaft rotates to a corresponding position not less than the water flow adjustment angle (35°), and the water flow direction is adjusted quickly;

[0133] Maintaining state: the shaft is adjusted to the water flow adjustment angle (30°) to keep the water flow direction stable;

[0134] Ending state: The shaft rotates to a corresponding position not greater than the water flow adjustment angle (25°), completing the adjustment and optimizing the water flow state.

[0135] Through this strategy, the system achieves fast response, stable maintenance and optimized finishing within the preset cycle, ensuring that the water flow state meets the process requirements.

[0136] Embodiment 6:

[0137] The constant water flow image preset by the control core shows that the angle between the normal vector of the normal water flow direction and the horizontal plane is 10°. In a water flow adjustment command, the angle between the normal vector of the real-time water flow direction and the normal vector of the constant water flow direction projected on the horizontal plane is 25°, which exceeds the water flow similarity threshold (15°) and triggers the adjustment command.

[0138] The adjustment strategy of the path control terminal is as follows:

[0139] Quick response state: the shaft rotates to a corresponding position not less than the water flow adjustment angle (30°) to quickly adjust the water flow direction;

[0140] Maintaining state: the shaft is adjusted to the water flow adjustment angle (25°) to keep the water flow direction stable;

[0141] Ending state: The shaft rotates to a corresponding position not greater than the water flow adjustment angle (20°), completing the adjustment and optimizing the water flow state.

[0142] Through this intelligent regulation, the system achieves efficient water flow optimization within a preset cycle and improves sewage treatment efficiency.

[0143] Embodiment 7:

[0144] The constant water flow image preset by the control core shows that the angle between the normal vector of the normal water flow direction and the horizontal plane is 20°. In a water flow adjustment command, the angle between the normal vector of the real-time water flow direction and the normal vector of the constant water flow direction projected on the horizontal plane is 40°, which exceeds the water flow similarity threshold (30°) and triggers the adjustment command.

[0145] The adjustment strategy of the path control terminal is as follows:

[0146] Quick response state: the shaft rotates to a corresponding position not less than the water flow adjustment angle (45°) to quickly adjust the water flow direction;

[0147] Maintaining state: the shaft is adjusted to the water flow adjustment angle (40°) to keep the water flow direction stable;

[0148] Ending state: The shaft rotates to a corresponding position not greater than the water flow adjustment angle (35°), completing the adjustment and optimizing the water flow state.

[0149] Through this strategy, the system achieves efficient water flow optimization within the preset cycle, ensuring the stable operation and efficient processing capacity of the aerobic granular sludge system.

[0150] Specifically, the particle size parameters at least include the particle size distribution state at each depth of the biochemical pool, and the surge parameters at least include the real-time rising flow rate of the biochemical pool.

[0151] In implementation, the particle size distribution follows a normal distribution, and the rising flow rate is the speed at which the gas and / or water in the biochemical pool rises in the reaction pool. The real-time rising flow rate at a single position in the biochemical pool can be collected according to the surge collector at the corresponding position.

[0152] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0153] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An aeration system based on aerobic granular sludge, which uses aeration to drive sludge and water flow in a biochemical pool, characterized in that: include: A plurality of collectors are arranged at a plurality of collection positions of the biochemical pool, and are used to collect the particle size parameters and surge parameters of the biochemical pool according to a preset period; Wherein, the particle size parameter at least includes the particle size distribution state at each depth of the biochemical pool, and the surge parameter at least includes the real-time rising flow rate of the biochemical pool; the control core is connected to each collector respectively, and is used to respond to the particle size parameter to issue a water flow adjustment instruction, and respond to the surge parameter to generate a corresponding sludge adjustment instruction; A plurality of actuators, which are respectively connected to the control core and arranged at a plurality of execution positions of the biochemical pool, include: A plurality of path control terminals for responding to the water flow regulation instruction and controlling the water flow state of the biochemical pool, and, A plurality of gushing control terminals for responding to the sludge adjustment instruction and controlling the sludge state of the biochemical pool; Among them, for a single preset cycle, it includes a rapid response state in the early stage, a maintenance state in the middle stage, and a closing state in the final stage; The control core is provided with a constant water flow image and a water flow similarity threshold. For a single preset cycle, the control core performs fitting according to the water flow state and the normal water flow image, responds to fitting anomalies and controls the path control terminal to adjust the water flow direction; Wherein, the fitting anomaly is that the fitting result is not greater than the water flow similarity threshold; The water flow state at least includes the flow direction of the water in the biochemical pool; the control core is provided with a normal sludge particle size range, For the single preset cycle, the control core responds that the sludge state is not in the normal sludge particle size range, and controls the gushing control terminal to increase the gushing frequency; The sludge state at least includes the particle size of the sludge in the biochemical pool.

2. The aeration system based on aerobic granular sludge according to claim 1, characterized in that: The several collectors include: A plurality of particle size collectors are arranged at a plurality of collection positions at different heights, and at least include a collection position on the water surface and a collection position in the water; A plurality of surge collectors are configured as a plurality of impeller blades and are arranged at a plurality of collection positions in the water and at the bottom of the pool.

3. The aeration system based on aerobic granular sludge according to claim 2, characterized in that: For a single path control terminal, it is configured to include a guide plate and a rotating shaft for controlling the angle of the guide plate; The rotating shaft is used to rotate in response to the water flow adjustment instruction and drive the guide plate to move to a corresponding water flow adjustment angle.

4. The aeration system based on aerobic granular sludge according to claim 3, characterized in that: The path control terminal is also provided with a counter-regulation strategy. For the water flow adjustment angle of a single water flow adjustment instruction, the path control terminal sequentially performs the following adjustments within the preset period, including: In the fast response state, rotate to a corresponding position not less than the water flow adjustment angle; Rotate to the water flow adjustment angle in the maintained state; In the closing state, rotate to a corresponding position not greater than the water flow adjustment angle; The water flow adjustment angle is the angle between the normal vector of the real-time water flow direction and the normal vector of the normal water flow direction projected on the horizontal plane.

5. The aeration system based on aerobic granular sludge according to claim 4, characterized in that: The control core is also provided with a periodic regulation strategy for responding to the completion of water flow regulation and / or sludge regulation and resetting the corresponding preset period.

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