SBR sewage treatment device and SBR sewage treatment method

Abstract

The invention discloses an SBR (sequencing batch reactor) sewage treatment device and an SBR sewage treatment method. The SBR sewage treatment device comprises a reaction tank, a plurality of detection components, an aeration mechanism, a stirring mechanism and a controller. A plurality of reaction layers which are sequentially arranged in the height direction are defined by the reaction tank, and each reaction layer comprises a plurality of reaction areas; the plurality of detection assemblies are sequentially arranged along the height direction of the reaction tank and are arranged in one-to-one correspondence with the plurality of reaction layers, the detection assemblies are arranged on the inner circumferential wall of the reaction tank, each detection assembly comprises a plurality of dissolved oxygen detection parts and a plurality of water flow detection parts, and the plurality of dissolved oxygen detection parts and the plurality of water flow detection parts are arranged at intervals along the circumferential direction of the reaction tank; at least one reaction area is arranged between any two adjacent dissolved oxygen detection pieces, and each reaction area corresponds to at least one dissolved oxygen detection piece; the controller is used for controlling the stirring mechanism to stir the corresponding reaction area according to a detection signal of the detection assembly. According to the invention, the distribution uniformity of dissolved oxygen in the reaction tank can be improved.

Description

Technical Field

[0001] This application relates to the field of sewage treatment devices, and in particular to an SBR sewage treatment device and an SBR sewage treatment method. Background Art

[0002] In the related art, SBR sewage treatment devices are commonly used to purify sewage. During the sewage purification process, an aeration system delivers gas into the reaction tank to increase the dissolved oxygen concentration in the sewage, thereby providing a suitable living environment for aerobic microorganisms and prompting the aerobic microorganisms to decompose organic impurities in the sewage. However, the diffusion mode of gas in sewage is disordered diffusion, making it difficult to form a uniform and stable dissolved oxygen distribution in various regions of the reaction tank. When the dissolved oxygen concentration in a local area is lower than the preset concentration threshold, the activity of aerobic microorganisms in that area will decrease, thereby affecting the overall sewage treatment effect and reducing the purification efficiency of the SBR sewage treatment device. Summary of the Invention

[0003] In order to ensure that the dissolved oxygen concentration in each area of the reaction tank is not lower than the set concentration threshold and improve the purification efficiency of sewage, this application provides an SBR sewage treatment device.

[0004] This application further proposes an SBR sewage treatment method.

[0005] The SBR sewage treatment device provided by this application adopts the following technical solutions: An SBR sewage treatment device includes: a reaction tank for storing sewage, the reaction tank defining a plurality of reaction layers arranged in sequence along the height direction of the reaction tank, each reaction layer including a plurality of reaction regions, and the plurality of reaction regions being arranged in sequence along the radial direction of the reaction tank.

[0006] A plurality of detection components, the plurality of detection components being arranged in sequence along the height direction of the reaction tank, the plurality of detection components being provided in one-to-one correspondence with the plurality of reaction layers, the detection components being provided on the inner peripheral wall of the reaction tank, the detection components including a plurality of dissolved oxygen detectors and a plurality of water flow detectors, the plurality of dissolved oxygen detectors and the plurality of water flow detectors being spaced apart along the circumferential direction of the reaction tank, the plurality of dissolved oxygen detectors being provided in one-to-one correspondence with the plurality of water flow detectors, at least one reaction region being spaced between any two adjacent dissolved oxygen detectors, each reaction region corresponding to at least one dissolved oxygen detector, the water flow detector being used to detect the flow rate and flow direction of the sewage in the corresponding reaction region, and the dissolved oxygen detector being used to detect the dissolved oxygen concentration in the corresponding reaction region.

[0007] An aeration mechanism, which is arranged in the reaction tank and is used to convey gas into the reaction tank; a stirring mechanism, which is arranged in the reaction tank and is used to stir the sewage in the reaction area.

[0008] A controller, both the detection component and the stirring mechanism are communicatively connected to the controller, and the controller is used to control the stirring mechanism to stir the corresponding reaction area according to the detection signal of the detection component.

[0009] By adopting the above technical solution, the controller combines the detection signals of multiple dissolved oxygen detection components and the detection signals of multiple water flow detection components to determine the dissolved oxygen concentration in each reaction area. When the dissolved oxygen concentration in any reaction area is lower than the preset dissolved oxygen concentration, the controller controls the stirring mechanism to stir the corresponding reaction area to promote the diffusion of gas into the stirred reaction area. Compared with the prior art, the present application can identify the reaction area with a dissolved oxygen concentration lower than the preset value and perform stirring, thereby improving the distribution uniformity of dissolved oxygen in the reaction tank and further improving the purification efficiency of sewage.

[0010] Preferably, the stirring mechanism includes a first driving member, a second driving member, a third driving member, a fourth driving member and a stirring member. The first driving member is connected and cooperated with the second driving member, the second driving member is connected and cooperated with the third driving member, the third driving member is connected and cooperated with the fourth driving member, and the fourth driving member is connected and cooperated with the stirring member. The first driving member is used to drive the stirring member to move along the first direction of the reaction tank, the second driving member is used to drive the stirring member to move along the second direction of the reaction tank, the third driving member is used to drive the stirring member to move along the height direction of the reaction tank, and the fourth driving member is used to drive the stirring member to rotate.

[0011] Wherein, the first direction, the second direction and the height direction are perpendicular to each other pairwise.

[0012] By adopting the above technical solution, the stirring member can move between different reaction areas and between different reaction layers, and further can realize the stirring operation of multiple reaction areas, improve the diffusion efficiency of gas in local sewage, and enhance the distribution uniformity of dissolved oxygen.

[0013] Preferably, a plurality of stirring blades are arranged on the outer peripheral wall of the stirring member, and the plurality of stirring blades are spaced apart along the circumferential direction of the stirring member.

[0014] By adopting the above technical solution, the stirring blades rotate around the central axis of the stirring member and cut into the sewage, the stirring blades disperse the sediments in the sewage and drive the sewage to flow, thereby realizing efficient agitation of the sewage in the reaction tank, making the distribution of dissolved oxygen in the tank body more uniform, thus improving the overall aeration efficiency and the sewage treatment effect.

[0015] Preferably, the aeration mechanism includes an aeration pipe and a fifth driving member. The aeration pipe is pivotally installed in the reaction tank. The fifth driving member is arranged on the outer peripheral wall of the reaction tank. The fifth driving member is connected and cooperated with the aeration pipe. The fifth driving member is used to drive the aeration pipe to rotate around the central axis of the aeration pipe, and the aeration pipe is used to convey gas into the reaction tank.

[0016] By adopting the above technical solution, the air outlet holes of the aeration pipe can face different reaction areas in the reaction tank, so that the gas can be released into the reaction area with a dissolved oxygen concentration lower than the preset value, thereby enhancing the uniformity of the oxygen distribution in the sewage, and further improving the activity and reaction efficiency of aerobic microorganisms, which helps to further improve the purification efficiency of the sewage.

[0017] Preferably, both the aeration pipe and the fifth driving member are multiple. The multiple aeration pipes and the multiple fifth driving members are both arranged at intervals along the first direction of the reaction tank, and the multiple aeration pipes and the multiple fifth driving members are arranged in one-to-one correspondence.

[0018] By adopting the above technical solution, each aeration pipe covers a different reaction area, so that an independent and uniform oxygen supply amount can be obtained during the process of purifying sewage in each reaction area, thereby expanding the coverage range of the gas and increasing the gas-liquid contact area in the reaction tank, and further improving the overall gas conveying efficiency, so that oxygen is more evenly distributed in the sewage.

[0019] A kind of SBR sewage treatment method provided by the present application adopts the following technical solution: An SBR sewage treatment method, the SBR sewage treatment method is applicable to the above-mentioned SBR sewage treatment device, including: obtaining the sewage flow data of the reaction area where the water flow detection member is arranged in each reaction layer, and the dissolved oxygen concentration data of the reaction area where the dissolved oxygen detection member is arranged in the reaction layer; determining the dissolved oxygen concentration value of each reaction area in the reaction layer based on the sewage flow data and the dissolved oxygen concentration data; judging whether the dissolved oxygen concentration value is lower than the preset dissolved oxygen concentration value; if the dissolved oxygen concentration value is lower than the preset dissolved oxygen concentration value, then controlling the stirring mechanism to stir the corresponding reaction area.

[0020] Preferably, determining the dissolved oxygen concentration values of multiple reaction regions in the reaction layer based on the sewage flow data and the dissolved oxygen concentration data includes: determining the flow direction of sewage in the reaction layer based on multiple pieces of the sewage flow data; and calculating the dissolved oxygen concentration values of the reaction regions where the dissolved oxygen detection components are not provided by using an interpolation algorithm based on multiple pieces of the dissolved oxygen concentration data and the flow direction.

[0021] By adopting the above technical solution, by combining the sewage flow data and the dissolved oxygen concentration data, the sewage flow state and the dissolved oxygen distribution in each reaction region of the reaction layer are obtained in real time, and the dissolved oxygen concentration in the region without a sensor is complementarily judged based on the interpolation algorithm, so as to realize the comprehensive identification of the low-oxygen region, and further accurately control the stirring mechanism to perform local stirring operations in the target region to promote gas diffusion and improve the uniformity of the dissolved oxygen distribution inside the reaction tank, and finally improve the purification efficiency of the sewage.

[0022] Preferably, determining the dissolved oxygen concentration values of multiple reaction regions in the reaction layer based on the sewage flow data and the dissolved oxygen concentration data includes: determining the flow direction of sewage in the reaction layer based on multiple pieces of the sewage flow data; and calculating the dissolved oxygen concentration values of the reaction regions where the dissolved oxygen detection components are not provided by using an interpolation algorithm based on multiple pieces of the dissolved oxygen concentration data and the flow direction.

[0023] By adopting the above technical solution, by performing interpolation estimation by combining the flow direction of the sewage and the dissolved oxygen concentration values of the reaction regions where the dissolved oxygen detection components are provided, the dissolved oxygen concentration of the reaction regions without dissolved oxygen sensors can be accurately obtained without increasing the number of sensors, and the use cost of the SBR sewage treatment method is reduced.

[0024] Preferably, determining the flow direction of sewage in the reaction layer based on multiple pieces of the sewage flow data includes: marking the reaction regions where the water flow detection components are provided as sampling regions, and obtaining the sewage flow data of multiple sampling regions, where the sewage flow data includes sewage flow velocity and sewage flow direction vector; determining the flow direction weight of each sampling region based on the sewage flow velocity; determining the weighted flow direction vector of the corresponding sampling region according to the flow direction weight and the sewage flow direction vector; and performing vector synthesis on all the weighted flow direction vectors to determine the flow direction of sewage in the reaction layer.

[0025] By adopting the above technical solution, by performing weighted synthesis calculation on the sewage flow data of multiple sampling regions, the flow direction of sewage in the reaction layer can be accurately determined, so as to provide a reliable basis for subsequent judgment of the gas diffusion path and interpolation calculation, and improve the accuracy of the calculation of the dissolved oxygen concentration values of the reaction regions without dissolved oxygen detection components.

[0026] Preferably, calculating the dissolved oxygen concentration value of the reaction area where the dissolved oxygen detection component is not provided by using the interpolation algorithm based on the plurality of dissolved oxygen concentration data and the flow direction includes: marking the reaction area where the dissolved oxygen detection component is provided as the detection area, and marking the reaction area where the dissolved oxygen detection component is not provided as the interpolation area; determining whether the sewage flow directions of the plurality of detection areas are the same as the flow direction based on the sewage flow data, and if the sewage flow direction of the detection area is the same as the flow direction, marking the corresponding detection area as the calculation area; determining the interval distance between the interpolation area and the plurality of calculation areas; determining the interpolation weights of the plurality of calculation areas based on the interval distance, wherein the interpolation weight is inversely proportional to the interval distance; and determining the dissolved oxygen concentration value of the interpolation area based on the plurality of dissolved oxygen concentration data and the corresponding interpolation weights.

[0027] By adopting the above technical solution, by constructing the spatial relationship between the interpolation area and the plurality of upstream calculation areas, and then allocating the interpolation weights according to the distance differences of each calculation area, and finally performing weighted calculation on the dissolved oxygen concentration data, the dissolved oxygen concentration value of the detection component area where the dissolved oxygen detection component is not provided can be accurately calculated.

[0028] Preferably, before controlling the stirring mechanism to stir the corresponding reaction area, it further includes: obtaining the spatial position of the stirring member in the stirring mechanism; calculating the included angle between the air outlet hole of the aeration pipe and the stirring member according to the spatial position; and driving the aeration pipe to rotate by the included angle towards the stirring member.

[0029] By adopting the above technical solution, by dynamically adjusting the air outlet direction of the aeration pipe according to the position of the stirring member, the directional release of gas to the reaction area stirred by the stirring member is realized, so that the dissolved oxygen concentration value of the reaction area stirred by the stirring member can be quickly increased.

[0030] In summary, the present application includes at least one of the following beneficial technical effects: 1. By combining the detection signals of a plurality of dissolved oxygen detection components and the detection signals of a plurality of water flow detection components by the controller to determine the dissolved oxygen concentration of each reaction area, when the dissolved oxygen concentration of any reaction area is lower than the preset dissolved oxygen concentration, the controller controls the stirring mechanism to stir the corresponding reaction area to promote the diffusion of gas to the stirred reaction area. Compared with the prior art, the present application can identify the reaction area with a dissolved oxygen concentration lower than the preset value and perform stirring, so that the distribution uniformity of dissolved oxygen in the reaction tank can be improved, and further the purification efficiency of sewage can be improved; 2. By combining sewage flow data with dissolved oxygen concentration data, the sewage flow state and dissolved oxygen distribution in each reaction area of the reaction layer are obtained in real time, and the dissolved oxygen concentration in the area without sensors is complemented and judged based on the interpolation algorithm, so as to achieve a comprehensive identification of low-oxygen areas. Furthermore, the stirring mechanism is precisely controlled to perform local stirring operations within the target area, promoting gas diffusion and improving the uniformity of dissolved oxygen distribution inside the reaction tank, and ultimately improving the purification efficiency of sewage; 3. By dynamically adjusting the air outlet direction of the aeration pipe according to the position of the stirring member, the directional release of gas to the reaction area stirred by the stirring member is realized, so that the dissolved oxygen concentration value in the reaction area stirred by the stirring member can be quickly increased. Description of the Drawings

[0031] Figure 1 is a schematic diagram of the SBR sewage treatment device according to an embodiment of the present application; Figure 2 is a cross-sectional view of the SBR sewage treatment device according to an embodiment of the present application; Figure 3 is a cross-sectional view of the SBR sewage treatment device from another angle according to an embodiment of the present application; Figure 4 is a schematic diagram of multiple reaction areas and detection components in the reaction layer according to an embodiment of the present application; Figure 5 is a flowchart of the SBR sewage treatment method according to an embodiment of the present application.

[0032] Description of the Reference Numerals: 100, SBR sewage treatment device; 1, reaction tank; 11, water inlet; 12, decanter; 2, detection component; 21, dissolved oxygen detector; 22, water flow detector; 3, aeration mechanism; 31, aeration pipe; 311, air outlet hole; 32, fifth driving member; 4, stirring mechanism; 41, first driving member; 42, second driving member; 43, third driving member; 44, fourth driving member; 45, stirring member; 451, stirring blade. Detailed Embodiment

[0033] The following is a further detailed description of the present application in conjunction with the attached Figures 1 - 5 drawings.

[0034] An embodiment of the present application discloses an SBR sewage treatment device 100.

[0035] Referring to Figures 1 - 3, the SBR sewage treatment device 100 according to the embodiments of the present application includes: a reaction tank 1, a plurality of detection components 2, an aeration mechanism 3, a stirring mechanism 4, and a controller.

[0036] The reaction tank 1 is used for storing sewage. The reaction tank 1 defines a plurality of reaction layers arranged in sequence along the height direction of the reaction tank 1. Each reaction layer includes a plurality of reaction regions, and the plurality of reaction regions are arranged in sequence along the radial direction of the reaction tank 1. The height direction of the reaction tank 1 may refer to Figure 2 the up and down direction in

[0037] In some specific embodiments, 9 reaction regions may be provided in each reaction layer, and the 9 reaction regions are arranged in the form of a nine-square grid.

[0038] In some specific embodiments, the reaction tank 1 further includes a water inlet 11 and a water decanter 12. The water inlet 11 is provided on the outer peripheral wall of the reaction tank 1, and the water decanter 12 is provided in the reaction tank 1. Sewage flows into the reaction tank 1 through the water inlet 11, and the water decanter 12 is used to discharge the treated supernatant out of the reaction tank 1 during the water outlet stage.

[0039] The plurality of detection components 2 are arranged in sequence along the height direction of the reaction tank 1. The plurality of detection components 2 are arranged in one-to-one correspondence with the plurality of reaction layers. The detection components 2 are all provided on the inner peripheral wall of the reaction tank 1. The detection components 2 include a plurality of dissolved oxygen detectors 21 and a plurality of water flow detectors 22. The plurality of dissolved oxygen detectors 21 and the plurality of water flow detectors 22 are both arranged at intervals along the circumferential direction of the reaction tank 1. The plurality of dissolved oxygen detectors 21 are arranged in one-to-one correspondence with the plurality of water flow detectors 22. At least one reaction region is spaced between any two adjacent dissolved oxygen detectors 21. Each reaction region corresponds to at least one dissolved oxygen detector 21, and the dissolved oxygen detector 21 and the corresponding water flow detector 22 are both provided in the same reaction region. The water flow detector 22 is used to detect the flow rate and flow direction of the sewage in the corresponding reaction region, and the dissolved oxygen detector 21 is used to detect the dissolved oxygen concentration in the corresponding reaction region.

[0040] In some specific embodiments, referring to Figure 4 , the number of the dissolved oxygen detectors 21 and the number of the water flow detectors 22 are both 4. 9 reaction regions may be provided in each reaction layer, and the 9 reaction regions are arranged in the form of a nine-square grid. The 4 dissolved oxygen detectors 21 are respectively provided in the reaction regions at the 4 corner points among the 9 reaction regions, and the 4 water flow detectors 22 are respectively provided in the reaction regions at the 4 corner points among the 9 reaction regions.

[0041] The aeration mechanism 3 and the stirring mechanism 4 are both arranged in the reaction tank 1. The aeration mechanism 3 is used to convey gas into the reaction tank 1, and the stirring mechanism 4 is used to stir the sewage in the reaction area. Specifically, when the sewage is purified by aerobic microorganisms in the reaction tank 1, the aeration mechanism 3 conveys gas into the reaction tank 1 to increase the dissolved oxygen concentration in the reaction tank 1.

[0042] The detection component 2 and the stirring mechanism 4 are both communicatively connected to the controller. The controller is used to control the stirring mechanism 4 to stir the corresponding reaction area according to the detection signal of the detection component 2.

[0043] Specifically, the controller receives the detection signals of multiple dissolved oxygen detectors 21 arranged in each reaction layer and the detection signals of multiple water flow detectors 22. The controller determines the dissolved oxygen concentration of each reaction area in the reaction layer according to the detection signals of the multiple dissolved oxygen detectors 21 and the detection signals of the multiple water flow detectors 22. For the reaction area where the dissolved oxygen detector 21 is arranged, the detection signal of the dissolved oxygen detector 21 is the dissolved oxygen concentration of the reaction area where the dissolved oxygen detector 21 is arranged. For the reaction area where the dissolved oxygen detector 21 is not arranged, the controller calculates the dissolved oxygen concentration of the reaction area where the dissolved oxygen detector 21 is not arranged according to the detection signals of the multiple dissolved oxygen detectors 21 and the detection signals of the multiple water flow detectors 22.

[0044] Then, the controller determines whether the dissolved oxygen concentration of each reaction area is lower than the preset dissolved oxygen concentration. When the dissolved oxygen concentration of the reaction area is lower than the preset dissolved oxygen concentration, the controller controls the stirring mechanism 4 to stir the corresponding reaction area so that the gas can quickly diffuse towards the stirred reaction area, thereby increasing the dissolved oxygen concentration of the stirred reaction area.

[0045] It should be noted that the controller calculates the diffusion speed and diffusion path of the gas in the sewage according to the sewage flow rate and sewage flow direction corresponding to the reaction area where the water flow detector 22 is arranged in the reaction layer, and then combines the detection signals of the multiple dissolved oxygen detectors 21 to determine the concentration change trend of the gas diffusing from the reaction area where the dissolved oxygen detector 21 is arranged along the sewage flow direction to the reaction area where the dissolved oxygen detector 21 is not arranged, so as to estimate the dissolved oxygen concentration of the reaction area where the dissolved oxygen detector 21 is not arranged.

[0046] In some specific embodiments, the dissolved oxygen detector 21 can be a polarographic dissolved oxygen sensor, and the flow rate detector can include an electromagnetic flow rate sensor and an electromagnetic flow direction sensor. In other specific embodiments, the flow rate detector can also include an ultrasonic flow rate sensor and an ultrasonic flow direction sensor.

[0047] Thus, the controller determines the dissolved oxygen concentration in each reaction area by combining the detection signals of multiple dissolved oxygen detectors 21 and the detection signals of multiple water flow detectors 22. When the dissolved oxygen concentration in any reaction area is lower than the preset dissolved oxygen concentration, the controller controls the stirring mechanism 4 to stir the corresponding reaction area to promote the diffusion of gas into the stirred reaction area. Compared with the prior art, the present application can identify the reaction area with a dissolved oxygen concentration lower than the preset value and stir it, thereby improving the uniformity of the dissolved oxygen distribution in the reaction tank 1 and further improving the purification efficiency of sewage.

[0048] Referring to Figure 1 and Figure 2 , in some embodiments of the present application, the stirring mechanism 4 includes a first driving member 41, a second driving member 42, a third driving member 43, a fourth driving member 44 and a stirring member 45. The first driving member 41 is connected and cooperated with the second driving member 42, the second driving member 42 is connected and cooperated with the third driving member 43, the third driving member 43 is connected and cooperated with the fourth driving member 44, and the fourth driving member 44 is connected and cooperated with the stirring member 45. The first driving member 41 is used to drive the stirring member 45 to move along the first direction of the reaction tank 1, the second driving member 42 is used to drive the stirring member 45 to move along the second direction of the reaction tank 1, the third driving member 43 is used to drive the stirring member 45 to move along the height direction of the reaction tank 1, and the fourth driving member 44 is used to drive the stirring member 45 to rotate so that the stirring member 45 stirs the sewage. The first direction of the reaction tank 1 may refer to Figure 1 the left-right direction in Figure 1 , and the second direction of the reaction tank 1 may refer to

[0049] the front-back direction in

[0050] Specifically, the first driving member 41 drives the stirring member 45 to move along the left-right direction of the reaction tank 1, the second driving member 42 drives the stirring member 45 to move along the front-back direction of the reaction tank 1, the third driving member 43 drives the stirring member 45 to move along the up-down direction of the reaction tank 1, and the fourth driving member 44 drives the stirring member 45 to rotate so that the stirring member 45 stirs the sewage in the reaction area, enabling the stirring member 45 to move between different reaction areas and between different reaction layers, thereby realizing the stirring operation of multiple reaction areas, improving the diffusion efficiency of gas in the local sewage, and enhancing the uniformity of dissolved oxygen distribution.

[0051] In some specific embodiments, the first driving member 41 and the second driving member 42 are preferably rodless cylinders, the third driving member 43 is preferably a cylinder, and the fourth driving member 44 is preferably a motor.

[0052] Referring to Figure 1 andFigure 2 In some embodiments of the present application, a plurality of stirring blades 451 are provided on the outer peripheral wall of the stirring member 45, and the plurality of stirring blades 451 are spaced apart along the circumferential direction of the stirring member 45.

[0053] The stirring member 45 drives the stirring blades 451 to rotate synchronously. The stirring blades 451 rotate around the central axis of the stirring member 45 and cut into the sewage. The stirring blades 451 break up the sediment in the sewage and drive the sewage to form a flow, thereby realizing efficient agitation of the sewage in the reaction tank 1, making the distribution of dissolved oxygen in the tank body more uniform, thus improving the overall aeration efficiency and the sewage treatment effect.

[0054] In some specific embodiments, the stirring blades 451 can be installed on the outer peripheral wall of the stirring member 45 at an inclination angle of 45°.

[0055] Refer to Figures 1 - 3 In some embodiments of the present application, the aeration mechanism 3 includes an aeration pipe 31 and a fifth driving member 32. The aeration pipe 31 is pivotally installed in the reaction tank 1. The fifth driving member 32 is provided on the outer peripheral wall of the reaction tank 1. The fifth driving member 32 is connected and cooperated with the aeration pipe 31. The fifth driving member 32 is used to drive the aeration pipe 31 to rotate around the central axis of the aeration pipe 31, and the aeration pipe 31 is used to convey gas into the reaction tank 1.

[0056] Specifically, the aeration pipe 31 is provided with air outlet holes 311, and the aeration pipe 31 is communicated with an external gas conveying device. The external gas conveying device conveys gas into the reaction tank 1 through the air outlet holes 311 of the aeration pipe 31.

[0057] During the rotation of the aeration pipe 31, the air outlet holes 311 of the aeration pipe 31 can face different reaction regions in the reaction tank 1, so that the gas can be released to the reaction regions with a dissolved oxygen concentration lower than the preset value, thereby enhancing the uniformity of the oxygen distribution in the sewage, and further improving the activity and reaction efficiency of aerobic microorganisms, which helps to further improve the purification efficiency of the sewage.

[0058] Further, the controller is communicatively connected to the fifth driving member 32. The controller determines the spatial position of the stirring member 45 in the reaction tank 1 according to the movement stroke of the first driving member 41, the movement stroke of the second driving member 42, and the movement stroke of the third driving member 43. When the stirring member 45 is stirring, the controller controls the fifth driving member 32 to drive the aeration pipe 31 to rotate towards the stirring member 45, so that the air outlet holes 311 face the stirring member 45.

[0059] Refer to Figures 1 - 3, in some embodiments of the present application, both the aeration pipes 31 and the fifth driving members 32 are multiple. The multiple aeration pipes 31 and the multiple fifth driving members 32 are both arranged at intervals along the first direction of the reaction tank 1, and the multiple aeration pipes 31 and the multiple fifth driving members 32 are arranged in one-to-one correspondence.

[0060] Along the first direction of the reaction tank 1, each aeration pipe 31 covers a different reaction area, so that an independent and uniform oxygen supply amount can be obtained during the purification of sewage in each reaction area, thereby expanding the gas coverage range and increasing the gas-liquid contact area in the reaction tank 1, and further improving the overall gas transmission efficiency, so that oxygen is more evenly distributed in the sewage.

[0061] Based on this, the present application further discloses an SBR sewage treatment method. The SBR sewage treatment method is applicable to the SBR sewage treatment device described in the above embodiments, as Figure 5 shown. According to the SBR sewage treatment method described in the embodiments of the present application, it includes the following steps: S1. Obtain the sewage flow data of the reaction areas where the water flow detection members are provided in each reaction layer, and the dissolved oxygen concentration data of the reaction areas where the dissolved oxygen detection members are provided in the reaction layer.

[0062] In this embodiment, obtaining the sewage flow data of the reaction areas where the water flow detection members are provided in each reaction layer and the dissolved oxygen concentration data of the reaction areas where the dissolved oxygen detection members are provided in the reaction layer means that the water flow detection members are used to perform real-time detection of the sewage state in the reaction areas where the water flow detection members are provided, collect the flow data of the sewage in the reaction areas where the water flow detection members are provided, and at the same time collect the dissolved oxygen concentration values in the sewage of the corresponding reaction areas through the dissolved oxygen detection members, and form the sewage flow data and dissolved oxygen concentration data input of some areas in the current reaction layer.

[0063] S2. Determine the dissolved oxygen concentration value of each reaction area in the reaction layer based on the sewage flow data and the dissolved oxygen concentration data.

[0064] In this embodiment, for the reaction areas where the dissolved oxygen detection members are provided, the controller takes the dissolved oxygen concentration values output by the dissolved oxygen detection members as the dissolved oxygen concentration values of the corresponding reaction areas. For the reaction areas where the dissolved oxygen detection members are not provided, the controller calculates by combining the dissolved oxygen concentration data and the sewage flow data of multiple reaction areas to determine the dissolved oxygen concentration values of the reaction areas where the dissolved oxygen detection members are not provided.

[0065] S3. Judge whether the dissolved oxygen concentration value is lower than the preset dissolved oxygen concentration value.

[0066] In this embodiment, determining whether the dissolved oxygen concentration value is lower than the preset dissolved oxygen concentration value means that the controller compares the dissolved oxygen concentration value of each reaction area with the preset dissolved oxygen concentration value. If the dissolved oxygen concentration value of the reaction area is less than the preset dissolved oxygen concentration value, it is determined that the corresponding reaction area is in a hypoxic state.

[0067] S4. If the dissolved oxygen concentration value is lower than the preset dissolved oxygen concentration value, control the stirring mechanism to stir the corresponding reaction area.

[0068] In this embodiment, if the dissolved oxygen concentration value of the reaction area is lower than the preset dissolved oxygen concentration value, controlling the stirring mechanism to stir the corresponding reaction area means that the controller issues an instruction to control the stirring mechanism to move to the reaction area where the dissolved oxygen concentration value is lower than the preset dissolved oxygen concentration value, and then drives the stirring mechanism to perform a stirring action to enhance the mixing rate of oxygen and sewage, thereby increasing the dissolved oxygen concentration of the corresponding reaction area.

[0069] By combining the sewage flow data and the dissolved oxygen concentration data, the sewage flow state and the dissolved oxygen distribution in each reaction area of the reaction layer are obtained in real time, and the dissolved oxygen concentration in the area without a sensor is complementarily judged based on the interpolation algorithm, so as to achieve a comprehensive identification of the hypoxic area, and then accurately control the stirring mechanism to perform a local stirring operation in the target area to promote gas diffusion and improve the uniformity of the dissolved oxygen distribution inside the reaction tank, and finally improve the purification efficiency of the sewage.

[0070] In some embodiments of the present application, determining the dissolved oxygen concentration values of multiple reaction areas in the reaction layer based on the sewage flow data and the dissolved oxygen concentration data includes the following steps: S21. Determine the flow direction of the sewage in the reaction layer based on multiple sewage flow data.

[0071] In this embodiment, determining the flow direction of the sewage in the reaction layer based on multiple sewage flow data means that the controller receives the detection signals of multiple water flow detection components, analyzes the relative positions between the water flow detection components, and compares the sewage flow data of the water flow detection components, so as to determine the flow direction of the sewage in the reaction layer.

[0072] S22. Calculate the dissolved oxygen concentration values of the reaction areas without dissolved oxygen detection components based on multiple dissolved oxygen concentration data and the flow direction by using the interpolation algorithm.

[0073] In this embodiment, based on multiple dissolved oxygen concentration data and the flow direction, an interpolation algorithm is used to calculate the dissolved oxygen concentration value of the reaction area where no dissolved oxygen detection component is provided. This means that on the basis of the controller determining the flow direction of the sewage in the reaction layer, multiple reaction areas with dissolved oxygen detection components adjacent to the reaction area where no dissolved oxygen detection component is provided are selected as interpolation reference reaction areas, and the difference reference reaction areas are located on the upstream side of the reaction area where no dissolved oxygen detection component is provided. Combining the spatial distances between each interpolation reference reaction area and the target area, different weight coefficients are assigned, and the dissolved oxygen concentration value of the reaction area where no dissolved oxygen detection component is provided is calculated by using the weighted average method in combination with the dissolved oxygen concentration values of each interpolation reference reaction area.

[0074] By combining the flow direction of the sewage and the dissolved oxygen concentration values of the reaction areas with dissolved oxygen detection components for interpolation estimation, the dissolved oxygen concentration of the reaction areas without dissolved oxygen sensors can be accurately obtained without increasing the number of sensors, reducing the use cost of the SBR sewage treatment method.

[0075] In some embodiments of the present application, determining the flow direction of the sewage in the reaction layer based on multiple sewage flow data includes the following steps: S211. Mark the reaction areas with water flow detection components as sampling areas, and obtain the sewage flow data of multiple sampling areas. The sewage flow data includes sewage flow velocity and sewage flow direction vector.

[0076] In this embodiment, marking the reaction areas with water flow detection components as sampling areas and obtaining the sewage flow data of multiple sampling areas means that the controller detects the sewage flow data in the sampling areas through the water flow detection components.

[0077] It should be noted that an XY two-dimensional plane coordinate system is established in the reaction layer. The sewage flow direction vector includes the sewage flow direction vector along the X-axis and the sewage flow direction vector along the Y-axis.

[0078] S212. Determine the flow direction weight of each sampling area based on the sewage flow velocity.

[0079] In this embodiment, determining the flow direction weight of each sampling area based on the sewage flow velocity means that the controller performs a weighted score on the importance of each sampling area according to the sewage flow velocity in each sampling area. The higher the sewage flow velocity, the higher the weight value of the corresponding sampling area.

[0080] Specifically, add up the multiple sewage flow velocities to obtain the total sewage flow velocity, and determine the flow direction weight of each sampling area by comparing the relationship between the sewage flow velocity and the total sewage flow velocity.

[0081] In some specific embodiments, the number of sampling regions is 4. The sewage flow rates of the 4 sampling regions are 0.25 m / s, 0.1 m / s, 0.05 m / s, and 0.1 m / s respectively. The total sewage flow rate is 0.5 m / s. The flow direction weight of the sewage flow rate of 0.25 m / s is 0.5, the flow direction weight of the sewage flow rate of 0.1 m / s is 0.2, the flow direction weight of the sewage flow rate of 0.05 m / s is 0.1, and the flow direction weight of the sewage flow rate of 0.1 m / s is 0.2.

[0082] S213. Determine the weighted flow direction vector of the corresponding sampling region according to the flow direction weight and the sewage flow direction vector.

[0083] In this embodiment, determining the weighted flow direction vector of the corresponding sampling region according to the flow direction weight and the sewage flow direction vector means that the controller performs a mathematical multiplication operation on the sewage flow direction vector of each sampling region and the corresponding flow direction weight to form a weighted flow direction vector.

[0084] In some specific embodiments, the number of sampling regions is 3. The 3 sampling regions are the first sampling region, the second sampling region, and the third sampling region respectively. The sewage flow direction vector of the first sampling region is (0.6, 0.8), the sewage flow rate of the first sampling region is 0.3 m / s, the sewage flow direction vector of the second sampling region is (-0.8, 0.6), the sewage flow rate of the second sampling region is 0.15 m / s, the sewage flow direction vector of the third sampling region is (0, -1), the sewage flow rate of the third sampling region is 0.05 m / s, the flow direction weight of the first sampling region is 0.6, the flow direction weight of the second sampling region is 0.3, and the flow direction weight of the third sampling region is 0.1.

[0085] The weighted flow direction vector of the first sampling region is (0.36, 0.48), the weighted flow direction vector of the first sampling region is (-0.24, 0.18), and the weighted flow direction vector of the first sampling region is (0, 0.1).

[0086] It should be noted that 0.6 in the sewage flow direction vector of the first sampling region, -0.8 in the sewage flow direction vector of the second sampling region, and 0 in the sewage flow direction vector of the third sampling region are all the sewage flow direction vectors along the X-axis. 0.8 in the sewage flow direction vector of the first sampling region, 0.6 in the sewage flow direction vector of the second sampling region, and -1 in the sewage flow direction vector of the third sampling region are all the sewage flow direction vectors along the Y-axis, and the negative sign indicates the opposite direction.

[0087] S214. Perform vector synthesis on all weighted flow direction vectors to determine the flow direction of the sewage in the reaction layer.

[0088] In this embodiment, vector synthesis is performed on all weighted flow direction vectors to determine the flow direction of the sewage in the reaction layer, which means that the controller performs vector summation calculation on the weighted flow direction vectors of all sampling areas to obtain the sewage flow direction vector, so that the flow direction of the sewage in the reaction layer can be determined according to the sewage flow direction vector.

[0089] By performing weighted synthesis calculation on the sewage flow data of multiple sampling areas, the flow direction of the sewage in the reaction layer can be accurately determined, thereby providing a reliable basis for subsequent judgment of the gas diffusion path and interpolation calculation, and improving the accuracy of the dissolved oxygen concentration value calculation in the reaction area where no dissolved oxygen detection component is provided.

[0090] In some embodiments of the present application, based on multiple dissolved oxygen concentration data and flow directions, an interpolation algorithm is used to calculate the dissolved oxygen concentration value of the reaction area where no dissolved oxygen detection component is provided, including the following steps: S221. Mark the reaction area where the dissolved oxygen detection component is provided as the detection area, and mark the reaction area where no dissolved oxygen detection component is provided as the interpolation area.

[0091] S222. Determine whether the sewage flow directions of multiple detection areas are the same as the flow direction based on the sewage flow data. If the sewage flow direction of the detection area is the same as the flow direction, mark the corresponding detection area as the calculation area.

[0092] In this embodiment, determining whether the sewage flow directions of multiple detection areas are the same as the flow direction based on the sewage flow data, and if the sewage flow direction of the detection area is the same as the flow direction, marking the corresponding detection area as the calculation area means that the controller determines whether the water flow direction of the detection area is consistent with the sewage flow direction according to the water flow direction data of each detection area and the sewage flow direction in the reaction tank. If it is determined that the water flow direction of the detection area is consistent with the sewage flow direction, mark the corresponding detection area as the calculation area, and the dissolved oxygen concentration data of the calculation area is used to calculate the dissolved oxygen concentration value of the reaction area where no dissolved oxygen detection component is provided.

[0093] S223. Determine the interval distances between the interpolation area and multiple calculation areas.

[0094] In this embodiment, determining the interval distances between the interpolation area and multiple calculation areas means that the controller calculates the spatial straight-line distances between the interpolation area and each calculation area. Specifically, an XY coordinate system is established on the reaction layer, and the spatial straight-line distance between the interpolation area and the calculation area refers to the straight-line distance between the center point of the interpolation area and the center point of the calculation area in the XY coordinate system.

[0095] S224. Determine the interpolation weights of multiple calculation areas based on the interval distances, where the interpolation weights are inversely proportional to the interval distances.

[0096] In this embodiment, interpolation weights for multiple calculation regions are determined based on the interval distances. Here, the interpolation weights are inversely proportional to the interval distances, which means that the controller adds up the interval distances between multiple interpolation regions and the calculation regions to obtain the total interval distance, and then determines the interpolation weights according to the ratio between the interval distance between the interpolation region and the calculation region and the total interval distance. The closer the interval distance is, the larger the interpolation weight is; the farther the interval distance is, the smaller the interpolation weight is.

[0097] In some specific embodiments, the formula for calculating the interpolation weights is: where Wi is the interpolation weight of the i-th calculation region, n is the number of calculation regions, and di is the interval distance between the i-th interpolation region and the calculation region.

[0098] S225. Determine the dissolved oxygen concentration value of the interpolation region based on multiple dissolved oxygen concentration data and the corresponding interpolation weights.

[0099] In this embodiment, determining the dissolved oxygen concentration value of the interpolation region based on multiple dissolved oxygen concentration data and the corresponding interpolation weights means that the controller calculates the weighted average of the dissolved oxygen concentration values of multiple calculation regions and the corresponding interpolation weights to obtain the dissolved oxygen concentration of the interpolation region.

[0100] In some specific embodiments, the formula for calculating the weighted average is: where DOtarget is the dissolved oxygen concentration value of the interpolation region, wi is the interpolation weight of the i-th calculation region, DOi is the dissolved oxygen concentration value of the i-th calculation region, and n is the number of calculation regions.

[0101] By constructing the spatial relationship between the interpolation region and multiple upstream calculation regions, and then allocating the interpolation weights according to the distance differences of each calculation region, and finally performing weighted calculation on the dissolved oxygen concentration data, the dissolved oxygen concentration value of the detection piece region where no dissolved oxygen detection piece is installed can be accurately calculated.

[0102] In some embodiments of the present application, before controlling the stirring mechanism to stir the corresponding reaction region, the SBR sewage treatment method may further include the following steps: S41. Obtain the spatial position of the stirring piece in the stirring mechanism.

[0103] In this embodiment, obtaining the spatial position of the stirring piece in the stirring mechanism means that the controller communicates with the stirring mechanism in real time to collect the spatial coordinate information of the stirring piece. The spatial coordinate information includes the specific position parameters of the stirring piece in the first direction, the second direction, and the height direction of the reaction tank. The spatial coordinate information is obtained through the movement strokes of the first driving part, the second driving part, and the third driving part.

[0104] S42. Calculate the included angle between the air outlet holes of the aeration pipe and the stirring member according to the spatial position.

[0105] In this embodiment, calculating the included angle between the air outlet holes of the aeration pipe and the stirring member according to the spatial position means that, based on the obtained spatial coordinate information of the stirring member, the controller combines the reference angle of the air outlet holes on the aeration pipe to calculate the included angle formed between the connection line of the air outlet holes on the aeration pipe and the position where the stirring member is located.

[0106] S43. Drive the aeration pipe to rotate by the included angle towards the stirring member.

[0107] In this embodiment, driving the aeration pipe to rotate by the included angle towards the stirring member means that the controller sends a control instruction to the fifth driving member according to the calculated included angle, and the fifth driving member drives the aeration pipe to rotate so that the air outlet holes on the aeration pipe face the stirring member, thereby realizing the directional release of gas towards the reaction area stirred by the stirring member.

[0108] By dynamically adjusting the air outlet direction of the aeration pipe according to the position of the stirring member, the directional release of gas to the reaction area stirred by the stirring member is realized, so that the dissolved oxygen concentration value in the reaction area stirred by the stirring member can be quickly increased.

[0109] The above are all the preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An SBR sewage treatment device, characterized in that, Comprising: A reaction tank (1) for storing sewage, the reaction tank (1) defining a plurality of reaction layers arranged in sequence along the height direction of the reaction tank (1), each reaction layer including a plurality of reaction regions arranged in sequence along the radial direction of the reaction tank (1); A plurality of detection components (2) arranged in sequence along the height direction of the reaction tank (1), the plurality of detection components (2) being provided in one-to-one correspondence with the plurality of reaction layers, the detection components (2) being provided on the inner peripheral wall of the reaction tank (1), the detection components (2) including a plurality of dissolved oxygen detectors (21) and a plurality of water flow detectors (22), the plurality of dissolved oxygen detectors (21) and the plurality of water flow detectors (22) being arranged at intervals along the circumferential direction of the reaction tank (1), the plurality of dissolved oxygen detectors (21) being provided in one-to-one correspondence with the plurality of water flow detectors (22), at least one reaction region being spaced between any two adjacent dissolved oxygen detectors (21), each reaction region corresponding to at least one dissolved oxygen detector (21), the water flow detector (22) being used to detect the flow rate and flow direction of the sewage in the corresponding reaction region, and the dissolved oxygen detector (21) being used to detect the dissolved oxygen concentration in the corresponding reaction region; An aeration mechanism (3) provided in the reaction tank (1) for delivering gas into the reaction tank (1); A stirring mechanism (4) provided in the reaction tank (1) for stirring the sewage in the reaction region; A controller, the detection component (2) and the stirring mechanism (4) being communicatively connected to the controller, the controller being used to control the stirring mechanism (4) to stir the corresponding reaction region according to the detection signal of the detection component (2).

2. The SBR sewage treatment device according to claim 1, characterized in that, The stirring mechanism (4) includes a first driving member (41), a second driving member (42), a third driving member (43), a fourth driving member (44) and a stirring member (45), the first driving member (41) being connected and cooperated with the second driving member (42), the second driving member (42) being connected and cooperated with the third driving member (43), the third driving member (43) being connected and cooperated with the fourth driving member (44), the fourth driving member (44) being connected and cooperated with the stirring member (45), the first driving member (41) being used to drive the stirring member (45) to move in a first direction of the reaction tank (1), the second driving member (42) being used to drive the stirring member (45) to move in a second direction of the reaction tank (1), the third driving member (43) being used to drive the stirring member (45) to move in the height direction of the reaction tank (1), and the fourth driving member (44) being used to drive the stirring member (45) to rotate; Wherein, the first direction, the second direction and the height direction are perpendicular to each other pairwise.

3. An SBR sewage treatment device according to claim 2, characterized in that, The outer peripheral wall of the stirring member (45) is provided with a plurality of stirring blades (451), and the plurality of stirring blades (451) are arranged at intervals in the circumferential direction of the stirring member (45).

4. An SBR sewage treatment device according to claim 1, characterized in that, The aeration mechanism (3) includes an aeration pipe (31) and a fifth driving member (32). The aeration pipe (31) is pivotally installed in the reaction tank (1), the fifth driving member (32) is arranged on the outer peripheral wall of the reaction tank (1), the fifth driving member (32) is connected and cooperated with the aeration pipe (31), the fifth driving member (32) is used to drive the aeration pipe (31) to rotate around the central axis of the aeration pipe (31), and the aeration pipe (31) is used to convey gas into the reaction tank (1).

5. An SBR sewage treatment device according to claim 4, characterized in that, Both the aeration pipe (31) and the fifth driving member (32) are multiple. The multiple aeration pipes (31) and the multiple fifth driving members (32) are both arranged at intervals in the first direction of the reaction tank (1), and the multiple aeration pipes (31) and the multiple fifth driving members (32) are arranged in one-to-one correspondence.

6. A method for treating sewage by SBR, the method for treating sewage by SBR being applicable to an SBR sewage treatment device according to any one of claims 1-5, characterized in that, The SBR sewage treatment method includes: Obtaining the sewage flow data of the reaction area where the water flow detection member is provided in each reaction layer, and the dissolved oxygen concentration data of the reaction area where the dissolved oxygen detection member is provided in the reaction layer; Determining the dissolved oxygen concentration value of each reaction area in the reaction layer based on the sewage flow data and the dissolved oxygen concentration data; Judging whether the dissolved oxygen concentration value is lower than a preset dissolved oxygen concentration value; If the dissolved oxygen concentration value is lower than the preset dissolved oxygen concentration value, controlling the stirring mechanism to stir the corresponding reaction area.

7. An SBR sewage treatment method according to claim 6, characterized in that, The determining the dissolved oxygen concentration values of multiple reaction areas in the reaction layer based on the sewage flow data and the dissolved oxygen concentration data includes: Determining the flow direction of sewage in the reaction layer based on multiple sewage flow data; Calculating the dissolved oxygen concentration value of the reaction area where the dissolved oxygen detection member is not provided by using an interpolation algorithm based on multiple dissolved oxygen concentration data and the flow direction.

8. A SBR sewage treatment method according to claim 7, characterized in that, The determining the flow direction of sewage in the reaction layer based on multiple sewage flow data includes: Marking the reaction area where the water flow detection member is provided as a sampling area, and obtaining the sewage flow data of the multiple sampling areas. The sewage flow data includes sewage flow rate and sewage flow direction vector; Determining the flow direction weight of each sampling area based on the sewage flow rate; Determining the weighted flow direction vector of the corresponding sampling area according to the flow direction weight and the sewage flow direction vector; Performing vector synthesis on all the weighted flow direction vectors to determine the flow direction of sewage in the reaction layer.

9. A SBR sewage treatment method according to claim 7, characterized in that, The calculating the dissolved oxygen concentration value of the reaction area where the dissolved oxygen detection member is not provided by using an interpolation algorithm based on multiple dissolved oxygen concentration data and the flow direction includes: Marking the reaction area where the dissolved oxygen detection member is provided as a detection area, and marking the reaction area where the dissolved oxygen detection member is not provided as an interpolation area; Based on the sewage flow data, determine whether the sewage flow directions of multiple detection areas are the same as the flow direction. If the sewage flow direction of a detection area is the same as the flow direction, mark the corresponding detection area as a calculation area; Determine the interval distances between the interpolation area and multiple calculation areas; Based on the interval distances, determine the interpolation weights of multiple calculation areas, where the interpolation weights are inversely proportional to the interval distances; Based on multiple dissolved oxygen concentration data and corresponding interpolation weights, determine the dissolved oxygen concentration value of the interpolation area.

10. A SBR sewage treatment method according to claim 6, characterized in that, Before controlling the stirring mechanism to stir the corresponding reaction area, it further includes: Obtain the spatial position of the stirring member in the stirring mechanism; Calculate the included angle between the air outlet holes of the aeration pipe and the stirring member according to the spatial position; Drive the aeration pipe to rotate by the included angle towards the stirring member.

Images