Sbr sewage treatment device and sbr sewage treatment method

Abstract

The application discloses a SBR sewage treatment device and a SBR sewage treatment method. The SBR sewage treatment device comprises a reaction tank, a plurality of detection assemblies, an aeration mechanism, a stirring mechanism and a controller. The reaction tank defines a plurality of reaction layers arranged in sequence along a height direction, and each reaction layer comprises a plurality of reaction areas. The plurality of detection assemblies are arranged in sequence along the height direction of the reaction tank and are arranged one by one in correspondence with the plurality of reaction layers. The detection assemblies are arranged on the inner circumferential wall of the reaction tank. The detection assemblies comprise a plurality of dissolved oxygen detection pieces and a plurality of water flow detection pieces. The plurality of dissolved oxygen detection pieces and the plurality of water flow detection pieces 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. 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 the detection signal of the detection assembly. The application can improve the uniformity of the distribution of dissolved oxygen in the reaction tank.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sewage treatment devices, in particular to an SBR sewage treatment device and an SBR sewage treatment method. BACKGROUND

[0002] In related technologies, the SBR sewage treatment device is often used for purifying sewage. In the process of purifying sewage, the aeration system delivers gas into the reaction tank to increase the dissolved oxygen concentration in the sewage, so as to provide a suitable living environment for aerobic microorganisms and promote the decomposition of organic impurities in the sewage by aerobic microorganisms. However, the diffusion of gas in the sewage is disordered diffusion, and it is difficult to form uniform and stable dissolved oxygen distribution in each region of the reaction tank. When the dissolved oxygen concentration in a local region is lower than a preset concentration threshold, the activity of aerobic microorganisms in the region will decrease, thereby affecting the overall sewage treatment effect and reducing the purification efficiency of the SBR sewage treatment device. SUMMARY

[0003] In order to make the dissolved oxygen concentration in each region of the reaction tank not lower than the preset concentration threshold and improve the purification efficiency of the sewage, the present application provides an SBR sewage treatment device.

[0004] The present application further provides an SBR sewage treatment method.

[0005] The SBR sewage treatment device provided by the present application adopts the following technical scheme:

[0006] An SBR sewage treatment device, comprising: a reaction tank, the reaction tank is used for storing sewage, the reaction tank defines a plurality of reaction layers arranged in sequence along the height direction of the reaction tank, each reaction layer comprises a plurality of reaction regions, and the plurality of reaction regions are arranged in sequence along the radial direction of the reaction tank.

[0007] A plurality of detection assemblies, the plurality of detection assemblies are arranged in sequence along the height direction of the reaction tank, the plurality of detection assemblies are arranged one by one corresponding to the plurality of reaction layers, the detection assemblies are all arranged on the inner circumferential wall of the reaction tank, the detection assemblies comprise a plurality of dissolved oxygen detection pieces and a plurality of water flow detection pieces, the plurality of dissolved oxygen detection pieces and the plurality of water flow detection pieces are arranged at intervals along the circumferential direction of the reaction tank, the plurality of dissolved oxygen detection pieces and the plurality of water flow detection pieces are arranged one by one corresponding to each other, at least one reaction region is arranged between any two adjacent dissolved oxygen detection pieces, each reaction region corresponds to at least one dissolved oxygen detection piece, the water flow detection piece is used for detecting the flow rate and flow direction of the sewage corresponding to the reaction region, and the dissolved oxygen detection piece is used for detecting the dissolved oxygen concentration corresponding to the reaction region.

[0008] An aeration mechanism is arranged in the reaction tank and is used to deliver gas into the reaction tank; a stirring mechanism is arranged in the reaction tank and is used to stir the sewage in the reaction region.

[0009] A controller is in communication connection with the detection assembly and the stirring mechanism, and is used to control the stirring mechanism to stir the corresponding reaction region according to the detection signal of the detection assembly.

[0010] By using the above technical solution, the controller determines the dissolved oxygen concentration of each reaction region by combining the detection signals of the plurality of dissolved oxygen detection members and the detection signals of the plurality of water flow detection members. When the dissolved oxygen concentration of any reaction region is lower than the preset dissolved oxygen concentration, the controller controls the stirring mechanism to stir the corresponding reaction region to promote the diffusion of gas into the stirred reaction region. Compared with the prior art, the present application can identify the reaction region with a dissolved oxygen concentration lower than the preset dissolved oxygen concentration and stir it, thereby improving the uniformity of the distribution of dissolved oxygen in the reaction tank and improving the purification efficiency of the sewage.

[0011] 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 matched with the second driving member, the second driving member is connected and matched with the third driving member, the third driving member is connected and matched with the fourth driving member, and the fourth driving member is connected and matched with the stirring member. The first driving member is used to drive the stirring member to move in a first direction of the reaction tank, the second driving member is used to drive the stirring member to move in a second direction of the reaction tank, the third driving member is used to drive the stirring member to move in a height direction of the reaction tank, and the fourth driving member is used to drive the stirring member to rotate.

[0012] The first direction, the second direction, and the height direction are arranged perpendicular to each other in pairs.

[0013] By using the above technical solution, the stirring member can move between different reaction regions and move between different reaction layers, thereby realizing the stirring operation of multiple reaction regions, improving the diffusion efficiency of gas in local sewage, and enhancing the uniformity of the distribution of dissolved oxygen.

[0014] Preferably, the outer peripheral wall of the stirring member is provided with a plurality of stirring blades, and the plurality of stirring blades are arranged spaced apart in the circumferential direction of the stirring member.

[0015] By adopting the technical scheme, the stirring blade rotates around the central axis of the stirring piece and cuts into the sewage, the stirring blade scatters the sediments in the sewage and drives the sewage to flow, and then efficient disturbance of the sewage in the reaction tank can be realized, the distribution of dissolved oxygen in the tank body is more uniform, and thus the overall aeration efficiency is improved and the sewage treatment effect is improved.

[0016] Preferably, the aeration mechanism comprises an aeration pipe and a fifth driving piece, the aeration pipe is pivotally installed in the reaction tank, the fifth driving piece is arranged on the outer peripheral wall of the reaction tank, the fifth driving piece is connected and matched with the aeration pipe, the fifth driving piece is used for driving the aeration pipe to rotate around the central axis of the aeration pipe, and the aeration pipe is used for conveying gas into the reaction tank.

[0017] By adopting the technical scheme, the gas outlet holes of the aeration pipes can be opposite to different reaction regions in the reaction tank, so that the gas can be released to the reaction regions below the preset dissolved oxygen concentration, the uniformity of oxygen distribution in the sewage can be improved, the activity and reaction efficiency of the aerobic microorganisms can be improved, and the purification efficiency of the sewage can be further improved.

[0018] Preferably, the aeration pipe and the fifth driving piece are multiple, the multiple aeration pipes and the multiple fifth driving pieces are arranged at intervals along the first direction of the reaction tank, and the multiple aeration pipes and the multiple fifth driving pieces are arranged one by one.

[0019] By adopting the technical scheme, each aeration pipe covers different reaction regions, so that independent and uniform oxygen supply can be obtained in the process of purifying the sewage in each reaction region, the coverage range of the gas can be expanded, the gas-liquid contact area in the reaction tank can be improved, the overall gas conveying efficiency can be improved, and the oxygen can be more uniformly distributed in the sewage.

[0020] The SBR sewage treatment method provided in the application adopts the following technical scheme:

[0021] The SBR sewage treatment method is suitable for the SBR sewage treatment device, and comprises the following steps: obtaining sewage flow data of the reaction region in each reaction layer provided with a water flow detection piece and dissolved oxygen concentration data of the reaction region in the reaction layer provided with a dissolved oxygen detection piece; determining a dissolved oxygen concentration value of each reaction region in the reaction layer based on the sewage flow data and the dissolved oxygen concentration data; determining whether the dissolved oxygen concentration value is lower than a preset dissolved oxygen concentration value; and if the dissolved oxygen concentration value is lower than the preset dissolved oxygen concentration value, controlling the stirring mechanism to stir the corresponding reaction region.

[0022] Preferably, the determining the dissolved oxygen concentration values of the plurality of reaction regions in the reaction layer based on the sewage flow data and the dissolved oxygen concentration data comprises: determining a flow direction of the sewage in the reaction layer based on the plurality of sewage flow data; and calculating the dissolved oxygen concentration values of the reaction regions without the dissolved oxygen detection member based on the plurality of dissolved oxygen concentration data and the flow direction by using an interpolation algorithm.

[0023] 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 of each reaction region in the reaction layer are obtained in real time, and the dissolved oxygen concentration of the region without the sensor is completed and judged based on the interpolation algorithm, so as to realize the comprehensive identification of the low-oxygen region, and then the stirring mechanism is accurately controlled to perform local stirring operation in the target region, so as to promote the gas diffusion and improve the uniformity of the dissolved oxygen distribution in the reaction tank, and finally improve the purification efficiency of the sewage.

[0024] Preferably, the determining the dissolved oxygen concentration values of the plurality of reaction regions in the reaction layer based on the sewage flow data and the dissolved oxygen concentration data comprises: determining a flow direction of the sewage in the reaction layer based on the plurality of sewage flow data; and calculating the dissolved oxygen concentration values of the reaction regions without the dissolved oxygen detection member based on the plurality of dissolved oxygen concentration data and the flow direction by using an interpolation algorithm.

[0025] By adopting the above technical solution, by combining the sewage flow direction and the dissolved oxygen concentration values of the reaction regions provided with the dissolved oxygen detection member for interpolation estimation, the dissolved oxygen concentration of the reaction region without the dissolved oxygen sensor can be accurately obtained without increasing the number of sensors, thereby reducing the use cost of the SBR sewage treatment method.

[0026] Preferably, the determining the flow direction of the sewage in the reaction layer based on the plurality of sewage flow data comprises: marking the reaction regions provided with the water flow detection member as sampling regions, and obtaining the sewage flow data of the plurality of sampling regions, wherein the sewage flow data comprises a sewage flow rate and a sewage flow direction vector; determining a flow direction weight of each sampling region based on the sewage flow rate; determining a 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 the sewage in the reaction layer.

[0027] By adopting the above technical solution, by performing weighted synthesis calculation on the sewage flow data of the plurality of sampling regions, the flow direction of the sewage in the reaction layer can be accurately determined, thereby providing a reliable basis for subsequent gas diffusion path judgment and interpolation calculation, and improving the accuracy of the calculation of the dissolved oxygen concentration values of the reaction regions without the dissolved oxygen detection member.

[0028] Preferably, the dissolved oxygen concentration value of the reaction area without the dissolved oxygen detection member is calculated by using an interpolation algorithm based on the plurality of dissolved oxygen concentration data and the flow direction, comprising: marking the reaction area provided with the dissolved oxygen detection member as a detection area, and marking the reaction area without the dissolved oxygen detection member as an interpolation area; determining whether the sewage flow direction of the plurality of detection areas is 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, the corresponding detection area is marked as a calculation area; determining the interval distance between the interpolation area and the plurality of calculation areas; determining the interpolation weight of the plurality of calculation areas based on the interval distance, wherein the interpolation weight is inversely proportional to the interval distance; determining the dissolved oxygen concentration value of the interpolation area based on the plurality of dissolved oxygen concentration data and the corresponding interpolation weight.

[0029] By adopting the above technical solution, the spatial relationship between the interpolation area and the plurality of upstream calculation areas is constructed, and then the interpolation weight is allocated according to the distance difference of each calculation area, and finally the dissolved oxygen concentration data is calculated by weighting, so that the dissolved oxygen concentration value of the detection member area without the dissolved oxygen detection member can be accurately calculated.

[0030] Preferably, before the stirring mechanism stirs the corresponding reaction area, the method further comprises: 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 towards the stirring member by the included angle.

[0031] By adopting the above technical solution, the air outlet direction of the aeration pipe is dynamically adjusted according to the position of the stirring member, so that the gas can be released in a directional manner to the reaction area stirred by the stirring member, so that the dissolved oxygen concentration value of the reaction area stirred by the stirring member can be quickly improved.

[0032] In summary, the present application has at least one of the following beneficial technical effects:

[0033] 1. By using the controller to combine the detection signals of the plurality of dissolved oxygen detection members and the detection signals of the plurality of water flow detection members 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 dissolved oxygen concentration and stir it, so that the uniformity of the distribution of dissolved oxygen in the reaction tank can be improved, and the purification efficiency of the sewage can be improved.

[0034] 2. By combining sewage flow data and dissolved oxygen concentration data, the sewage flow state and dissolved oxygen distribution of each reaction area in the reaction layer are obtained in real time, and the dissolved oxygen concentration of the area without sensor is completed and judged based on the interpolation algorithm, so as to realize the comprehensive identification of the low oxygen area, and then the stirring mechanism is accurately controlled to perform local stirring operation in the target area, so as to promote gas diffusion and improve the uniformity of dissolved oxygen distribution in the reaction tank, and finally improve the purification efficiency of sewage;

[0035] 3. By dynamically adjusting the air outlet direction of the aeration pipe according to the position of the stirring part, the gas is released to the reaction area stirred by the stirring part in a directional manner, so that the dissolved oxygen concentration value of the reaction area stirred by the stirring part can be quickly improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a schematic diagram of the SBR sewage treatment device in the embodiment of the present application;

[0037] Figure 2 is a sectional view of the SBR sewage treatment device in the embodiment of the present application;

[0038] Figure 3 is a sectional view of the SBR sewage treatment device in the embodiment of the present application from another angle;

[0039] Figure 4 is a schematic diagram of the plurality of reaction areas and detection components in the reaction layer in the embodiment of the present application;

[0040] Figure 5 is a flowchart of the SBR sewage treatment method in the embodiment of the present application.

[0041] BRIEF DESCRIPTION OF DRAWINGS

[0042] 100, SBR sewage treatment device;

[0043] 1, reaction tank; 11, water inlet; 12, decanter;

[0044] 2, detection component; 21, dissolved oxygen detection part; 22, water flow detection part;

[0045] 3, aeration mechanism; 31, aeration pipe; 311, air outlet hole; 32, fifth driving part;

[0046] 4, stirring mechanism; 41, first driving part; 42, second driving part; 43, third driving part; 44, fourth driving part; 45, stirring part; 451, stirring blade. DETAILED DESCRIPTION

[0047] The following will be described in detail in combination with the accompanying Figures 1-5 The present application is further described in detail.

[0048] The SBR sewage treatment device 100 is disclosed by the embodiments of the present application.

[0049] With reference to Figures 1-3 , the SBR sewage treatment device 100 according to the embodiments of the present application comprises a reaction tank 1, a plurality of detection assemblies 2, an aeration mechanism 3, a stirring mechanism 4 and a controller.

[0050] The reaction tank 1 is used for storing sewage, and 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 comprising a plurality of reaction areas arranged in sequence along the radial direction of the reaction tank 1, and the height direction of the reaction tank 1 can refer to the up-down direction in Figure 2 .

[0051] In some specific embodiments, 9 reaction areas can be arranged in each reaction layer, and the 9 reaction areas are arranged in the form of a nine-square grid.

[0052] In some specific embodiments, the reaction tank 1 further comprises a water inlet 11 and a decanter 12, the water inlet 11 is arranged on the outer peripheral wall of the reaction tank 1, and the decanter 12 is arranged in the reaction tank 1, the sewage flows into the reaction tank 1 through the water inlet 11, and the decanter 12 is used for discharging the treated supernatant out of the reaction tank 1 in the water outlet stage.

[0053] The plurality of detection assemblies 2 are arranged in sequence along the height direction of the reaction tank 1, and the plurality of detection assemblies 2 are arranged one by one corresponding to the plurality of reaction layers, and the detection assemblies 2 are arranged on the inner peripheral wall of the reaction tank 1, and the detection assemblies 2 comprise a plurality of dissolved oxygen detection pieces 21 and a plurality of water flow detection pieces 22, the plurality of dissolved oxygen detection pieces 21 and the plurality of water flow detection pieces 22 are arranged at intervals along the circumferential direction of the reaction tank 1, the plurality of dissolved oxygen detection pieces 21 and the plurality of water flow detection pieces 22 are arranged one by one, at least one reaction area is arranged between any two adjacent dissolved oxygen detection pieces 21, each reaction area corresponds to at least one dissolved oxygen detection piece 21, and the dissolved oxygen detection piece 21 and the corresponding water flow detection piece 22 are arranged in the same reaction area, the water flow detection piece 22 is used for detecting the flow rate and flow direction of the sewage in the corresponding reaction area, and the dissolved oxygen detection piece 21 is used for detecting the dissolved oxygen concentration in the corresponding reaction area.

[0054] In some specific embodiments, with reference to Figure 4 , the number of dissolved oxygen detection pieces 21 and the number of water flow detection pieces 22 are both 4, 9 reaction areas can be arranged in each reaction layer, and the 9 reaction areas are arranged in the form of a nine-square grid, 4 dissolved oxygen detection pieces 21 are arranged in the reaction areas at the 4 corner points in the 9 reaction areas, and 4 water flow detection pieces 22 are arranged in the reaction areas at the 4 corner points in the 9 reaction areas.

[0055] The aeration mechanism 3 and the stirring mechanism 4 are both arranged in the reaction tank 1, the aeration mechanism 3 is used for conveying gas in the reaction tank 1, and the stirring mechanism 4 is used for stirring sewage in the reaction area. Specifically, when the reaction tank 1 purifies sewage by using aerobic microorganisms, the aeration mechanism 3 conveys gas into the reaction tank 1 to increase the dissolved oxygen concentration in the reaction tank 1.

[0056] The detection assembly 2 and the stirring mechanism 4 are both in communication connection with the controller, and the controller is used for controlling the stirring mechanism 4 to stir the corresponding reaction area according to the detection signal of the detection assembly 2.

[0057] Specifically, the controller receives the detection signals of the plurality of dissolved oxygen detection pieces 21 and the detection signals of the plurality of water flow detection pieces 22 arranged in each reaction layer, and determines the dissolved oxygen concentration of each reaction area in the reaction layer according to the detection signals of the plurality of dissolved oxygen detection pieces 21 and the detection signals of the plurality of water flow detection pieces 22. For the reaction area provided with the dissolved oxygen detection piece 21, the detection signal of the dissolved oxygen detection piece 21 is the dissolved oxygen concentration of the reaction area provided with the dissolved oxygen detection piece 21. For the reaction area not provided with the dissolved oxygen detection piece 21, the controller calculates the dissolved oxygen concentration of the reaction area not provided with the dissolved oxygen detection piece 21 according to the detection signals of the plurality of dissolved oxygen detection pieces 21 and the detection signals of the plurality of water flow detection pieces 22.

[0058] 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.

[0059] 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 of the reaction area provided with the water flow detection piece 22 in the reaction layer, and then determines the concentration change trend of the gas from the reaction area provided with the dissolved oxygen detection piece 21 to the reaction area not provided with the dissolved oxygen detection piece 21 along the sewage flow direction according to the detection signals of the plurality of dissolved oxygen detection pieces 21, so as to estimate the dissolved oxygen concentration of the reaction area not provided with the dissolved oxygen detection piece 21.

[0060] In some specific embodiments, the dissolved oxygen detection piece 21 can be a polarographic dissolved oxygen sensor, and the flow rate detection piece can include an electromagnetic flow rate sensor and an electromagnetic flow direction sensor. In another specific embodiment, the flow rate detection piece can also include an ultrasonic flow rate sensor and an ultrasonic flow direction sensor.

[0061] Therefore, the controller determines the dissolved oxygen concentration of each reaction region by combining the detection signals of the plurality of dissolved oxygen detection members 21 and the detection signals of the plurality of water flow detection members 22, and when the dissolved oxygen concentration of any reaction region is lower than the preset dissolved oxygen concentration, the controller controls the stirring mechanism 4 to stir the corresponding reaction region to promote the diffusion of the gas to the stirred reaction region. Compared with the prior art, the present application can identify the reaction region with a dissolved oxygen concentration lower than the preset dissolved oxygen concentration and perform stirring, thereby improving the uniformity of the distribution of dissolved oxygen in the reaction tank 1, and further improving the purification efficiency of the sewage.

[0062] 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 matched with the second driving member 42, the second driving member 42 is connected and matched with the third driving member 43, the third driving member 43 is connected and matched with the fourth driving member 44, and the fourth driving member 44 is connected and matched with the stirring member 45. The first driving member 41 is used to drive the stirring member 45 to move in the first direction of the reaction tank 1, the second driving member 42 is used to drive the stirring member 45 to move in the second direction of the reaction tank 1, the third driving member 43 is used to drive the stirring member 45 to move in the height direction of the reaction tank 1, and the fourth driving member 44 is used to drive the stirring member 45 to rotate to stir the sewage. The first direction of the reaction tank 1 can refer to the left-right direction in Figure 1 , the second direction of the reaction tank 1 can refer to the front-rear direction in Figure 1 .

[0063] Among them, the first direction of the reaction tank 1, the second direction of the reaction tank 1 and the height direction of the reaction tank 1 are perpendicular to each other.

[0064] Specifically, the first driving member 41 drives the stirring member 45 to move in the left-right direction of the reaction tank 1, the second driving member 42 drives the stirring member 45 to move in the front-rear direction of the reaction tank 1, the third driving member 43 drives the stirring member 45 to move in the up-down direction of the reaction tank 1, and the fourth driving member 44 drives the stirring member 45 to rotate to stir the sewage in the reaction region. Therefore, the stirring member 45 can move between different reaction regions and move between different reaction layers, thereby realizing stirring operation on multiple reaction regions, improving the diffusion efficiency of the gas in the local sewage, and enhancing the uniformity of the distribution of dissolved oxygen.

[0065] 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.

[0066] Referring to Figure 1 andFigure 2 In some embodiments of the present application, the outer peripheral wall of the stirring piece 45 is provided with a plurality of stirring blades 451, which are arranged at intervals along the circumferential direction of the stirring piece 45.

[0067] The stirring piece 45 drives the stirring blades 451 to rotate synchronously, and the stirring blades 451 rotate around the central axis of the stirring piece 45 and cut into the sewage, so as to scatter the sediments in the sewage and drive the sewage to flow, thereby realizing efficient disturbance of the sewage in the reaction tank 1, making the distribution of dissolved oxygen in the tank body more uniform, and thus improving the overall aeration efficiency and the sewage treatment effect.

[0068] In some specific embodiments, the stirring blades 451 can be installed on the outer peripheral wall of the stirring piece 45 at an inclination angle of 45°.

[0069] Referring to Figures 1-3 In some embodiments of the present application, the aeration mechanism 3 comprises an aeration pipe 31 and a fifth driving piece 32, the aeration pipe 31 is pivotally installed in the reaction tank 1, the fifth driving piece 32 is arranged on the outer peripheral wall of the reaction tank 1, the fifth driving piece 32 is connected and matched with the aeration pipe 31, the fifth driving piece 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 deliver gas into the reaction tank 1.

[0070] Specifically, the aeration pipe 31 is provided with a gas outlet hole 311, and the aeration pipe 31 and an external gas delivery device are in communication, and the external gas delivery device delivers gas into the reaction tank 1 through the gas outlet hole 311 of the aeration pipe 31.

[0071] During the rotation of the aeration pipe 31, the gas outlet hole 311 of the aeration pipe 31 can be opposite to different reaction regions in the reaction tank 1, so that the gas can be released to the reaction region below the preset dissolved oxygen concentration, thereby enhancing the uniformity of oxygen distribution in the sewage, and further improving the activity and reaction efficiency of the aerobic microorganisms, which helps to further improve the purification efficiency of the sewage.

[0072] Further, the controller is in communication connection with the fifth driving piece 32, the controller determines the spatial position of the stirring piece 45 in the reaction tank 1 according to the movement stroke of the first driving piece 41, the movement stroke of the second driving piece 42 and the movement stroke of the third driving piece 43, and when the stirring piece 45 is stirring, the controller controls the fifth driving piece 32 to drive the aeration pipe 31 to rotate towards the stirring piece 45, so that the gas outlet hole 311 is opposite to the stirring piece 45.

[0073] Referring to Figures 1-3In some embodiments of the present application, the aeration pipes 31 and the fifth driving members 32 are both multiple, the multiple aeration pipes 31 and the multiple fifth driving members 32 are arranged in the first direction of the reaction tank 1 and are arranged in one-to-one correspondence.

[0074] In the first direction of the reaction tank 1, each aeration pipe 31 covers a different reaction area, so that independent and uniform oxygen supply can be obtained in the process of purifying wastewater in each reaction area, thereby expanding the coverage of the gas and increasing the gas-liquid contact area in the reaction tank 1, and further improving the overall gas delivery efficiency, so that the oxygen is more uniformly distributed in the wastewater.

[0075] Based on this, the present application further discloses an SBR wastewater treatment method, which is suitable for the SBR wastewater treatment device described in the above embodiments, as shown in Figure 5 The SBR wastewater treatment method according to the embodiments of the present application includes the following steps:

[0076] S1, obtaining wastewater flow data of a reaction area in each reaction layer provided with a water flow detection member and dissolved oxygen concentration data of a reaction area in the reaction layer provided with a dissolved oxygen detection member.

[0077] In the present embodiment, obtaining the wastewater flow data of the reaction area in each reaction layer provided with the water flow detection member and the dissolved oxygen concentration data of the reaction area in the reaction layer provided with the dissolved oxygen detection member means that the water flow detection member is used to detect the real-time state of the wastewater in the reaction area provided with the water flow detection member, the flow data of the wastewater in the reaction area provided with the water flow detection member is collected, and at the same time, the dissolved oxygen concentration value in the wastewater in the corresponding reaction area is collected by the dissolved oxygen detection member, thereby forming the wastewater flow data and the dissolved oxygen concentration data input of the partial area in the current reaction layer.

[0078] S2, determining the dissolved oxygen concentration value of each reaction area in the reaction layer based on the wastewater flow data and the dissolved oxygen concentration data.

[0079] In the present embodiment, for the reaction area provided with the dissolved oxygen detection member, the controller takes the dissolved oxygen concentration value output by the dissolved oxygen detection member as the dissolved oxygen concentration value of the corresponding reaction area, and for the reaction area not provided with the dissolved oxygen detection member, the controller calculates the dissolved oxygen concentration value of the reaction area not provided with the dissolved oxygen detection member by combining the dissolved oxygen concentration data and the wastewater flow data of multiple reaction areas.

[0080] S3, judging whether the dissolved oxygen concentration value is lower than a preset dissolved oxygen concentration value.

[0081] In the embodiment, the 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 region with the preset dissolved oxygen concentration value, and if the dissolved oxygen concentration value of the reaction region is lower than the preset dissolved oxygen concentration value, it is determined that the corresponding reaction region is in a low-oxygen state.

[0082] S4, if the dissolved oxygen concentration value is lower than the preset dissolved oxygen concentration value, the stirring mechanism is controlled to stir the corresponding reaction region.

[0083] In the embodiment, if the dissolved oxygen concentration value of the reaction region is lower than the preset dissolved oxygen concentration value, the stirring mechanism is controlled to stir the corresponding reaction region, which means that the controller issues an instruction to control the stirring mechanism to move to the reaction region with the dissolved oxygen concentration value lower than the preset dissolved oxygen concentration value, and then drives the stirring mechanism to perform stirring action, so as to increase the mixing rate of oxygen and sewage, thereby improving the dissolved oxygen concentration of the corresponding reaction region.

[0084] By combining the sewage flow data and the dissolved oxygen concentration data, the sewage flow state and the dissolved oxygen distribution of each reaction region in the reaction layer are obtained in real time, and the interpolation algorithm is used to complete the judgment of the dissolved oxygen concentration of the region without the sensor, so as to realize the comprehensive identification of the low-oxygen region, and then the stirring mechanism is accurately controlled to perform local stirring operation in the target region, so as to promote the gas diffusion and improve the uniformity of the dissolved oxygen distribution in the reaction tank, and finally improve the purification efficiency of the sewage.

[0085] In some embodiments of the present application, the dissolved oxygen concentration values of the plurality of reaction regions in the reaction layer are determined based on the sewage flow data and the dissolved oxygen concentration data, including the following steps:

[0086] S21, determining the flow direction of the sewage in the reaction layer based on a plurality of sewage flow data.

[0087] In the embodiment, the flow direction of the sewage in the reaction layer is determined based on a plurality of sewage flow data, which means that the controller receives the detection signals of a plurality of water flow detection members, and determines the flow direction of the sewage in the reaction layer by analyzing the relative positions between the water flow detection members and comparing the sewage flow data of the water flow detection members.

[0088] S22, calculating the dissolved oxygen concentration value of the reaction region without the dissolved oxygen detection member by using the interpolation algorithm based on the plurality of dissolved oxygen concentration data and the flow direction.

[0089] In the embodiment, the interpolation algorithm is used to calculate the dissolved oxygen concentration value of the reaction area without the dissolved oxygen detection member based on the plurality of dissolved oxygen concentration data and the flow direction, which means that the controller selects a plurality of reaction areas with the dissolved oxygen detection member adjacent to the reaction area without the dissolved oxygen detection member as the interpolation reference reaction areas based on the determination of the flow direction of the sewage in the reaction layer, and the difference reference reaction area is located on the upstream side of the reaction area without the dissolved oxygen detection member, and different weight coefficients are assigned in combination with the spatial distance between each interpolation reference reaction area and the target area, and the weighted average method is used to calculate the dissolved oxygen concentration value of the reaction area without the dissolved oxygen detection member in combination with the dissolved oxygen concentration values of each interpolation reference reaction area.

[0090] By combining the flow direction of the sewage and the interpolation estimation of the dissolved oxygen concentration value of the reaction area with the dissolved oxygen detection member, the dissolved oxygen concentration of the reaction area without the dissolved oxygen sensor can be accurately obtained without increasing the number of sensors, thereby reducing the use cost of the SBR sewage treatment method.

[0091] In some embodiments of the present application, the flow direction of the sewage in the reaction layer is determined based on a plurality of sewage flow data, which includes the following steps:

[0092] S211, the reaction area with the water flow detection member is marked as a sampling area, and the sewage flow data of a plurality of sampling areas is obtained, the sewage flow data including sewage flow velocity and sewage flow direction vector.

[0093] In the embodiment, the reaction area with the water flow detection member is marked as a sampling area, and the sewage flow data of a plurality of sampling areas is obtained, which means that the controller detects the sewage flow data in the sampling area through the water flow detection member.

[0094] It should be noted that an XY two-dimensional plane coordinate system is established in the reaction layer, and 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.

[0095] S212, the flow direction weight of each sampling area is determined based on the sewage flow velocity.

[0096] In the embodiment, the flow direction weight of each sampling area is determined based on the sewage flow velocity, which means that the controller weights and scores the importance of each sampling area according to the sewage flow velocity in each sampling area, and the higher the sewage flow velocity, the higher the weight value of the corresponding sampling area.

[0097] Specifically, a plurality of sewage flow velocities are added to obtain a total sewage flow velocity, and the flow direction weight of each sampling area is determined by comparing the relationship between the sewage flow velocity and the total sewage flow velocity.

[0098] In some specific embodiments, the sampling region 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.

[0099] S213, determining the weighted flow direction vector of the corresponding sampling region according to the flow direction weight and the sewage flow direction vector.

[0100] 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 mathematical multiplication operation on the sewage flow direction vector of each sampling region and the corresponding flow direction weight to form the weighted flow direction vector.

[0101] In some specific embodiments, the sampling region 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), and 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.

[0102] 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).

[0103] 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 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 sewage flow direction vectors along the Y axis, and the negative sign indicates that the directions are opposite.

[0104] S214, performing vector synthesis on all the weighted flow direction vectors to determine the flow direction of the sewage in the reaction layer.

[0105] In the embodiment, the 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 a 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.

[0106] By performing weighted synthesis calculation on the sewage flow data of the plurality of sampling areas, the flow direction of the sewage in the reaction layer can be accurately determined, thereby providing a reliable basis for subsequent gas diffusion path judgment and interpolation calculation, and improving the accuracy of the calculation of the dissolved oxygen concentration value of the reaction area without a dissolved oxygen detection member.

[0107] In some embodiments of the present application, the dissolved oxygen concentration value of the reaction area without a dissolved oxygen detection member is calculated by using an interpolation algorithm based on the plurality of dissolved oxygen concentration data and the flow direction, including the following steps:

[0108] S221, marking the reaction area with a dissolved oxygen detection member as a detection area, and marking the reaction area without a dissolved oxygen detection member as an interpolation area.

[0109] S222, determining whether the flow direction of the sewage in the plurality of detection areas is the same as the flow direction based on the sewage flow data, and if the flow direction of the sewage in the detection area is the same as the flow direction, marking the corresponding detection area as a calculation area.

[0110] In the embodiment, the determination of whether the flow direction of the sewage in the plurality of detection areas is the same as the flow direction based on the sewage flow data, and if the flow direction of the sewage in the detection area is the same as the flow direction, marking the corresponding detection area as a calculation area, means that the controller judges whether the flow direction of the detection area is consistent with the flow direction of the sewage in the reaction tank according to the flow direction data of each detection area and the flow direction of the sewage in the reaction tank, and if the flow direction of the detection area is consistent with the flow direction of the sewage, marking the corresponding detection area as a 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 without a dissolved oxygen detection member.

[0111] S223, determining the interval distance between the interpolation area and the plurality of calculation areas.

[0112] In the embodiment, the determination of the interval distance between the interpolation area and the plurality of calculation areas means that the controller calculates the spatial straight line distance between the interpolation area and each calculation area, and 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 means 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.

[0113] S224, determining the interpolation weight of the plurality of calculation areas based on the interval distance, wherein the interpolation weight is inversely proportional to the interval distance.

[0114] In the embodiment, the interpolation weight of the plurality of calculation regions is determined based on the interval distance, wherein the interpolation weight is inversely proportional to the interval distance, that is, the controller adds the interval distance between the plurality of interpolation regions and the calculation regions to obtain a total interval distance, and then determines the interpolation weight 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, the greater the interpolation weight, and the farther the interval distance, the smaller the interpolation weight.

[0115] In some specific embodiments, the interpolation weight calculation formula is: Wherein, Wi is the interpolation weight of the i th calculation region, n is the number of calculation regions, di is the interval distance between the i th interpolation region and the calculation region.

[0116] S225, determine the dissolved oxygen concentration value of the interpolation region based on the plurality of dissolved oxygen concentration data and the corresponding interpolation weight.

[0117] In the embodiment, the dissolved oxygen concentration value of the interpolation region is determined based on the plurality of dissolved oxygen concentration data and the corresponding interpolation weight, that is, the controller calculates the weighted average value of the plurality of calculation regions and the corresponding interpolation weight to obtain the dissolved oxygen concentration of the interpolation region.

[0118] In some specific embodiments, the weighted average value calculation formula is: Wherein, 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.

[0119] By constructing the spatial relationship between the interpolation region and the plurality of upstream calculation regions, and then distributing the interpolation weight according to the distance difference of each calculation region, the weighted calculation of the dissolved oxygen concentration data is finally carried out, so that the dissolved oxygen concentration value of the detection region without the dissolved oxygen detection member can be accurately calculated.

[0120] In some embodiments of the present application, before the control of the stirring mechanism to stir the corresponding reaction region, the SBR sewage treatment method can further include the following steps:

[0121] S41, obtain the spatial position of the stirring member in the stirring mechanism.

[0122] In the embodiment, the acquiring the spatial position of the stirring part in the stirring mechanism refers to that the controller acquires the spatial coordinate information of the stirring part in real time through the communication connection with the stirring mechanism, the spatial coordinate information includes specific position parameters of the stirring part in the first direction of the reaction tank, the second direction of the reaction tank and the height direction of the reaction tank, and the spatial coordinate information is acquired through the movement stroke of the first driving part, the movement stroke of the second driving part and the movement stroke of the third driving part.

[0123] S42, calculating the included angle between the air outlet hole of the aeration pipe and the stirring part according to the spatial position.

[0124] In the embodiment, the calculating the included angle between the air outlet hole of the aeration pipe and the stirring part according to the spatial position refers to that the controller calculates the included angle formed between the air outlet hole of the aeration pipe and the connecting line of the stirring part on the basis of the acquired spatial coordinate information of the stirring part and in combination with the reference angle of the air outlet hole of the aeration pipe.

[0125] S43, driving the aeration pipe to rotate the included angle towards the stirring part.

[0126] In the embodiment, the driving the aeration pipe to rotate the included angle towards the stirring part refers to that the controller sends a control instruction to the fifth driving part according to the calculated included angle, and the fifth driving part drives the aeration pipe to rotate, so that the air outlet hole of the aeration pipe is opposite to the stirring part, thereby realizing the directional release of the gas towards the reaction area stirred by the stirring part.

[0127] By dynamically adjusting the air outlet direction of the aeration pipe according to the position of the stirring part, the directional release of the gas towards the reaction area stirred by the stirring part is realized, thereby the dissolved oxygen concentration value of the reaction area stirred by the stirring part can be quickly improved.

[0128] The above are the preferred embodiments of the application, and are not used to limit the protection scope of the application, therefore: all equivalent changes made on the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A SBR sewage treatment apparatus, characterized by comprising: The utility model relates to a sewage treatment device, including: a reaction pool (1) for storing sewage, the reaction pool (1) defines a plurality of reaction layers arranged in order along the height direction of the reaction pool (1), each reaction layer includes a plurality of reaction areas, and the plurality of reaction areas are arranged in order along the radial direction of the reaction pool (1); a plurality of detection assemblies (2) arranged in order along the height direction of the reaction pool (1), the plurality of detection assemblies (2) are arranged one by one with the plurality of reaction layers, the detection assembly (2) is arranged on the inner circumferential wall of the reaction pool (1), the detection assembly (2) includes a plurality of dissolved oxygen detection pieces (21) and a plurality of water flow detection pieces (22), the plurality of dissolved oxygen detection pieces (21) and the plurality of water flow detection pieces (22) are arranged at intervals along the circumferential direction of the reaction pool (1), the plurality of dissolved oxygen detection pieces (21) and the plurality of water flow detection pieces (22) are arranged one by one, at least one reaction area is arranged between any two adjacent dissolved oxygen detection pieces (21), each reaction area corresponds to at least one dissolved oxygen detection piece (21), the water flow detection piece (22) is used to detect the flow rate and flow direction of the sewage corresponding to the reaction area, and the dissolved oxygen detection piece (21) is used to detect the dissolved oxygen concentration corresponding to the reaction area; an aeration mechanism (3) arranged in the reaction pool (1), the aeration mechanism (3) is used to deliver gas in the reaction pool (1); a stirring mechanism (4) arranged in the reaction pool (1), the stirring mechanism (4) is used to stir the sewage in the reaction area; a controller, the detection assembly (2) and the stirring mechanism (4) are connected with the controller, and the controller is used to control the stirring mechanism (4) to stir the corresponding reaction area according to the detection signal of the detection assembly (2).

2. A SBR wastewater treatment device according to claim 1, characterized in that, The stirring mechanism (4) includes a first driving piece (41), a second driving piece (42), a third driving piece (43), a fourth driving piece (44) and a stirring piece (45), the first driving piece (41) is connected with the second driving piece (42), the second driving piece (42) is connected with the third driving piece (43), the third driving piece (43) is connected with the fourth driving piece (44), the fourth driving piece (44) is connected with the stirring piece (45), the first driving piece (41) is used to drive the stirring piece (45) to move along the first direction of the reaction pool (1), the second driving piece (42) is used to drive the stirring piece (45) to move along the second direction of the reaction pool (1), the third driving piece (43) is used to drive the stirring piece (45) to move along the height direction of the reaction pool (1), and the fourth driving piece (44) is used to drive the stirring piece (45) to rotate. The first direction, the second direction and the height direction are arranged perpendicular to each other.

3. A SBR sewage treatment apparatus according to claim 2, characterised in that, The outer peripheral wall of the stirring piece (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 piece (45).

4. The SBR wastewater treatment device according to claim 1, characterized in that, The aeration mechanism (3) comprises an aeration pipe (31) and a fifth driving piece (32), the aeration pipe (31) is pivotally installed in the reaction tank (1), the fifth driving piece (32) is arranged on the outer peripheral wall of the reaction tank (1), the fifth driving piece (32) is connected and matched with the aeration pipe (31), and the fifth driving piece (32) is used for driving the aeration pipe (31) to rotate around the central axis of the aeration pipe (31), and the aeration pipe (31) is used for conveying gas into the reaction tank (1).

5. A SBR sewage treatment apparatus according to claim 4, characterised in that, The aeration pipe (31) and the fifth driving piece (32) are both a plurality of aeration pipes (31) and a plurality of fifth driving pieces (32), and the plurality of aeration pipes (31) and the plurality of fifth driving pieces (32) are arranged at intervals in the first direction of the reaction tank (1), and the plurality of aeration pipes (31) and the plurality of fifth driving pieces (32) are arranged one by one.

6. A SBR wastewater treatment method, which is applied to a SBR wastewater treatment device according to any one of claims 1-5, characterized in that, The SBR sewage treatment method comprises: Obtaining sewage flow data of the reaction region provided with a water flow detection piece in each reaction layer and dissolved oxygen concentration data of the reaction region provided with a dissolved oxygen detection piece in the reaction layer; Determining the dissolved oxygen concentration value of each reaction region 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 region.

7. A SBR sewage treatment process according to claim 6, characterised in that, The determination of the dissolved oxygen concentration value of a plurality of reaction regions in the reaction layer based on the sewage flow data and the dissolved oxygen concentration data comprises: Determining the flow direction of the sewage in the reaction layer based on a plurality of sewage flow data; Calculating the dissolved oxygen concentration value of the reaction region without the dissolved oxygen detection piece by using an interpolation algorithm based on a plurality of dissolved oxygen concentration data and the flow direction.

8. The SBR wastewater treatment method according to claim 7, characterized in that, The determination of the flow direction of the sewage in the reaction layer based on a plurality of sewage flow data comprises: Marking the reaction region provided with the water flow detection piece as a sampling region, obtaining the sewage flow data of a plurality of sampling regions, and the sewage flow data comprises sewage flow rate and sewage flow direction vector; Determining the flow direction weight of each sampling region based on the sewage flow rate; Determining the weighted flow direction vector of the corresponding sampling region according to the flow direction weight and the sewage flow direction vector; Performing vector synthesis on all weighted flow direction vectors to determine the flow direction of the sewage in the reaction layer.

9. The SBR wastewater treatment method according to claim 7, characterized in that, The calculation of the dissolved oxygen concentration value of the reaction region without the dissolved oxygen detection piece by using an interpolation algorithm based on a plurality of dissolved oxygen concentration data and the flow direction comprises: Marking the reaction region provided with the dissolved oxygen detection piece as a detection region, and marking the reaction region without the dissolved oxygen detection piece as an interpolation region; determining whether the sewage flow directions of the detection regions are the same as the flow direction based on the sewage flow data, and if the sewage flow directions of the detection regions are the same as the flow direction, marking the corresponding detection regions as calculation regions; determining interval distances between the interpolation region and the calculation regions; determining interpolation weights of the calculation regions based on the interval distances, wherein the interpolation weights are inversely proportional to the interval distances; determining the dissolved oxygen concentration value of the interpolation region based on the dissolved oxygen concentration data and the interpolation weights.

10. The SBR wastewater treatment method according to claim 6, characterized in that, Before the control of the stirring mechanism to stir the corresponding reaction region, the method further comprises: obtaining a spatial position of a stirring element in the stirring mechanism; calculating an included angle between an air outlet of an aeration pipe and the stirring element according to the spatial position; driving the aeration pipe to rotate towards the stirring element by the included angle.

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