A self-adjusting water purification control system

Abstract

The present invention relates to the technical field of sewage treatment, and in particular to a self-adjusting water purification control system, comprising: a sedimentation unit for gravity sedimentation of settleable suspended matter, comprising a sedimentation tank, a water inlet component, a drainage component and a turbidity meter probe; a flotation unit for flotating non-settled suspended matter to the surface of sewage after flotation, comprising a flotation tank, an aeration component, a salvage component and a non-settled suspended matter detection component; a control unit for determining the type of suspended matter according to the turbidity of the suspended matter in the sedimentation tank, respectively determining the flotation mode and the sedimentation mode, and determining the vertical travel speed of the salvage component; wherein the flotation mode is to determine the salvage depth of the scraper; and the sedimentation mode is to adjust the volume of clean water discharged into the sedimentation tank. The present invention achieves the improvement of salvage effectiveness and flotation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a self-adjusting water purification control system. Background Art

[0002] In the prior art, the water purification system for industrial wastewater usually includes four main parts: pretreatment, primary treatment, secondary treatment and deep treatment. The pretreatment stage is mainly to remove larger suspended matter and particles in the wastewater, and commonly used equipment includes screens, grit chambers and regulating tanks; the primary treatment stage further removes suspended matter and some organic matter by physical methods, and the main equipment includes sedimentation tanks and flotation tanks; the secondary treatment stage uses biological treatment methods to degrade organic matter, and common biological treatment methods include activated sludge method, biofilm method, etc.; the deep treatment stage further removes difficult-to-degrade organic matter, nitrogen, phosphorus and other nutrients in the wastewater, as well as possible toxic and harmful substances, and commonly used technologies include reverse osmosis, ozone oxidation, activated carbon adsorption, etc.; during operation, the wastewater is first pretreated to remove large particle impurities, and then enters the primary treatment stage to remove suspended matter by sedimentation or flotation, and the wastewater enters the secondary treatment stage to use microorganisms to degrade organic matter. Finally, the deep treatment stage ensures that the wastewater meets the discharge standards through physical and chemical methods.

[0003] Chinese Patent Publication No.: CN106542704A discloses a potato starch wastewater treatment system, including a grille device, a water collection well, a vertical flow sedimentation flotation tank, an electrocoagulation high-pressure water purifier, a regulating tank, an anaerobic reactor, a multi-stage A / O reactor, a sedimentation tank, an ultrafiltration disinfection filter layer, a sludge concentration tank and a detection and discharge device, wherein the wastewater passes through the grille device, the water collection well, the vertical flow sedimentation flotation tank, the electrocoagulation high-pressure water purifier, the regulating tank, the anaerobic reactor, the multi-stage reactor, the sedimentation tank and the ultrafiltration disinfection filter layer in sequence and is finally discharged or recovered through the detection and discharge device; wherein: the grille device is tilted at the water inlet of the water collection well, the water collection well is arranged below the sewage discharge pipe, and the sewage is discharged or recovered through the detection and discharge device in sequence ... A submersible sewage pump is provided inside the water collection well to introduce sewage into a vertical flow sedimentation flotation tank; the vertical flow sedimentation flotation tank is used to separate suspended matter such as protein and starch that is partially lost in the wastewater, and then the sewage is pumped into an electrocoagulation high-pressure water purifier through a submersible sewage pump, the outlet of which is connected to a regulating tank, and after adjusting the temperature and pH value of the sewage, the sewage is passed into an anaerobic reactor through a submersible sewage pump to degrade the sewage, the anaerobic reactor is connected to the multi-stage A / O reactor through a sewage pipe, the outlet end of the multi-stage A / O reactor is connected to a sedimentation tank, a water pump is provided outside the sedimentation tank, the sewage is passed into an ultrafiltration disinfection filter layer and then tested and discharged, and a sludge pump is provided at the bottom to connect to a sludge concentration tank. It can be seen that the potato starch wastewater treatment system has problems such as incomplete sedimentation of suspended matter due to excessive density of suspended matter in the wastewater during sedimentation treatment, large amount of suspended matter in the flotation tank causing the flocs to be broken up and fall back during the descent of the salvage component, and incomplete salvage due to the large particle size of the suspended matter. Summary of the invention

[0004] To this end, the present invention provides a self-adjusting water purification control system to overcome the problems in the prior art of incomplete sedimentation of suspended matter due to excessive density of suspended matter in sewage during sedimentation treatment, large amount of suspended matter in the flotation tank causing the flocs to be broken up and fall back during the descent of the salvage component, and incomplete salvage resulting from the inability of the flocs to be completely floated to the water surface due to excessive particle size of the suspended matter.

[0005] To achieve the above object, the present invention provides a self-adjusting water purification control system, comprising:

[0006] A sedimentation unit, used for gravity sedimentation of settleable suspended solids in sewage to obtain sewage to be floated, comprising a sedimentation tank, a water inlet assembly connected to the sedimentation tank for introducing clean water into the sedimentation tank, a drainage assembly connected to the sedimentation tank for discharging the sewage to be floated, and a turbidity meter probe arranged above the drainage assembly for detecting the turbidity of the sewage to be floated;

[0007] A flotation unit, which is connected to the sedimentation unit and is used to float the non-settled suspended matter in the wastewater to be floated to the surface of the wastewater after flotation, comprises a flotation tank, an aeration assembly arranged on the bottom of the flotation tank for aerating the flotation tank, a salvaging assembly arranged above the aeration assembly for scraping the non-settled suspended matter away from the flotation tank, and a non-settled suspended matter detection assembly arranged below the salvaging assembly for determining the content and depth of the non-settled suspended matter by detecting the scattering width of a parallel light beam;

[0008] A control unit, which is connected to the sedimentation unit and the air flotation unit, respectively, for determining the type of suspended matter according to the turbidity of the suspended matter in the sedimentation tank, determining the air flotation mode and the sedimentation mode according to the type of the suspended matter, and determining the vertical travel speed of the salvage assembly according to the content of the non-settled suspended matter;

[0009] Among them, the flotation method is to determine the salvage depth of the scraper according to the depth of the unsettled suspended matter in the wastewater to be floated; the sedimentation method is to adjust the volume of clean water discharged into the sedimentation tank according to the turbidity of the wastewater to be floated.

[0010] Furthermore, the non-settled suspended matter detection component comprises:

[0011] A detection slide rail, which is arranged on the inner wall of the air flotation tank away from the aeration component, and is used to adjust the depth of the air flotation camera, wherein the inner wall where the detection slide rail is located is parallel to the inner wall close to the aeration component;

[0012] An air-floating camera connected to the detection slide rail for detecting the scattering width of the parallel light beam;

[0013] A beam slide rail, which is arranged on the inner wall between the inner wall where the detection slide rail is located and the inner wall close to the aeration assembly, for changing the depth of the beam emission position;

[0014] The light beam emitter is connected to the light beam slide rail and is used for emitting a parallel light beam into the wastewater to be floated.

[0015] Furthermore, the air-floating camera and the light beam emitter move in a follow-up relationship in the vertical direction, and the vertical heights of the air-floating camera and the light beam emitter are equal.

[0016] Furthermore, the salvage assembly comprises:

[0017] A horizontal slide rail, which is arranged above the flotation tank and is used to drive the scraper to move horizontally on the sewage surface;

[0018] A telescopic rod connected to the horizontal slide rail for adjusting the salvage depth of the scraper;

[0019] A scraper connected to the telescopic rod, used to scrape the non-settled suspended matter out of the flotation tank;

[0020] Wherein, the connection mode between the scraper and the telescopic rod is a ball joint connection.

[0021] Furthermore, the control unit is respectively connected to the turbidity meter probe and the drainage component to obtain the turbidity of the sewage. If the turbidity is less than or equal to a preset first turbidity, the suspended matter type of the sewage to be floated is determined to be a floatable type, and the drainage component is opened.

[0022] Furthermore, the control unit is respectively connected to the turbidity meter probe, the drainage component and the water inlet component, so as to lower the turbidity meter probe to obtain the turbidity of the sewage to be floated when the sewage to be floated is discharged. If the turbidity is greater than or equal to a preset second turbidity, it is determined that the type of suspended matter in the sewage to be floated is a non-floatable type, and the drainage component is closed, while the water inlet component is opened to input clean water into the sedimentation tank.

[0023] Furthermore, the preset first turbidity is smaller than the preset second turbidity.

[0024] Furthermore, the volume of clean water input into the sedimentation tank is the difference between the volume of the sedimentation tank and the product of the lowering depth of the turbidity meter probe and the bottom area of ​​the sedimentation tank.

[0025] Furthermore, the control unit is connected to the salvage assembly and the air flotation camera respectively to obtain the average scattering width of the parallel light beam in the vertical direction. If the average scattering width is greater than a preset scattering width, it is determined that the content of the non-settled suspended solids does not meet the requirements, and the vertical descent speed of the scraper is reduced.

[0026] The descending speed is positively correlated with the scattering width; the average scattering width is the average value of the beam scattering widths of several unit beam emission widths when the beam emitter rises from the bottom of the flotation tank to the surface of the flotation tank.

[0027] Furthermore, the control unit is connected to the salvage assembly and the turbidity meter probe respectively to obtain the depth of the light beam transmitter that meets the preset scattering condition. If the depth of the light beam transmitter is greater than or equal to the preset depth, and the salvage depth of the scraper is determined according to the air flotation conversion height corresponding to the depth of the non-settled suspended matter, the preset scattering condition is the maximum scattering width of the parallel light beam in the vertical direction,

[0028] Among them, the depth is the depth in the flotation pool when the flotation camera detects the maximum scattering width; the salvage depth is positively correlated with the depth; the flotation conversion height is the flotation height that can be achieved by flotating the non-settled suspended matter per unit depth by the aeration component at maximum power.

[0029] Compared with the prior art, the beneficial effect of the present invention lies in that the system of the present invention is provided with a sedimentation unit, a flotation unit and a control unit. The sedimentation unit separates the settleable suspended matter in the sewage by gravity sedimentation, thereby reducing the suspended matter load in the subsequent treatment stage. The flotation unit further processes the non-settled suspended matter in the sewage after sedimentation, and the suspended matter is floated into flocs by the bubbles generated by the bubble machine. The accuracy of floc salvage is achieved through the coordinated work of the salvage component and the non-settled suspended matter detection component. The sedimentation effect is monitored in real time by providing a turbidity meter probe, so that the system can automatically adjust the input amount of clean water according to the turbidity of the sewage, thereby optimizing the entire sewage treatment process. By adjusting the amount of clean water according to the type and amount of suspended matter, the system can effectively reduce the wastewater treatment cost. The salvage depth and descent speed are adjusted to increase the flotation efficiency of suspended matter and improve the effectiveness of salvage. Due to the high content of suspended matter in the sewage, the density of suspended matter in the sewage entering the sedimentation tank is large, which leads to incomplete sedimentation of the sediment. The sewage is diluted with clean water to make the sediment completely precipitate, thereby achieving the effectiveness of sewage sedimentation treatment. Due to the high concentration of suspended matter, too many flocs are formed, which are broken up by the salvage components during the salvage process. The broken up flocs will be suspended in the water, making it impossible to salvage completely, or due to the large particle size and mass of the suspended matter, the flotation degree does not meet the requirements, which increases the difficulty of salvage. The flotation efficiency is improved by automatically adjusting the descent speed of the salvage components and adjusting the salvage depth according to the scattering width of the suspended matter.

[0030] Furthermore, the system of the present invention can detect suspended matter at different depths by emitting parallel light beams at different depths of the flotation tank through the arrangement of a light beam slide, a light beam emitter, and a flotation camera, thereby more accurately controlling the flotation process; the arrangement of the light beam slide allows the light beam emitter to move in the vertical direction to adapt to different water levels and suspended matter distribution conditions, ensuring that the light beam can cover all areas in the flotation tank. The parallel light beam emitted by the light beam emitter is used in conjunction with the flotation camera to monitor the formation and distribution of floccules in real time, thereby improving the accuracy of suspended matter concentration detection.

[0031] Furthermore, the system of the present invention ensures the synchronous movement of the light beam transmitter and the air flotation camera in the air flotation tank by setting a follow-up relationship between the air flotation camera and the light beam transmitter, thereby improving the accuracy and continuity of suspended matter detection.

[0032] Furthermore, the system of the present invention sets a preset first turbidity and a preset second turbidity, monitors and adjusts the discharge of sewage and the input of clean water in real time. When the turbidity detected by the turbidity meter probe is less than the preset value, the system will automatically open the drainage component to allow the sewage to enter the flotation tank for further treatment; conversely, if the turbidity exceeds the preset value, the system will close the drainage component and open the water inlet component to input clean water into the sedimentation tank to dilute the sewage, thereby improving the sedimentation effect; the system can automatically adjust the input amount of clean water according to the turbidity of the sewage, prevent the settleable suspended matter suspended in the sewage from entering the flotation tank, thereby causing the flotation effect of the flotation tank to decrease, thereby improving the accuracy of sewage treatment.

[0033] Furthermore, the system of the present invention sets a preset scattering width. Since the more suspended matter there is in the liquid, the larger the scattering range of the light beam is, and the longer the scattering width of the light beam in the vertical direction is, by detecting the scattering width, the content of suspended matter in the liquid can be intuitively detected, thereby judging whether the suspended matter has reached the conditions for flotation treatment. When the detected scattering width exceeds the preset value, it indicates that the content of suspended matter is too high. At this time, the system will automatically adjust the descending speed of the salvage component to slow down the salvage process, avoid the high content of flocs caused by the high content of suspended matter, and cause the flocs to be unable to float after the salvage component breaks up the flocs, thereby affecting the flotation efficiency. By reducing the descending speed of the scraper, the flocs are fully in contact with the scraper, thereby improving the salvage efficiency.

[0034] Furthermore, the system of the present invention sets a preset depth. Since the suspended matter particle size is too large, which will also lead to an increase in the light beam scattering range, when large-particle suspended matter or high-content suspended matter is at a deeper position in the flotation tank, it can be determined that the weight of the suspended matter in this area is large, resulting in a decrease in the flotation capacity, and then resulting in failure to completely float to the liquid surface. By detecting and increasing the salvage depth of the salvage component, the effectiveness of suspended matter salvage and the efficiency of sewage treatment are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of a self-adjusting water purification control system according to an embodiment of the present invention;

[0036] Figure 2 The self-adjusting water purification control system of the embodiment of the present invention Figure 1 Enlarged view of part A;

[0037] Figure 3 This is an overall structural block diagram of a self-adjusting water purification control system according to an embodiment of the present invention;

[0038] Figure 4 This is a structural block diagram of a non-settled suspended matter detection component of a self-adjusting water purification control system according to an embodiment of the present invention;

[0039] Explanation of the accompanying numbers: 1-rotating motor, 2-turbidity meter probe, 3-sedimentation tank, 4-clean water pipe, 5-clean water stop valve, 6-sewage stop valve, 7-drain pipe, 8-aeration assembly, 9-scraper, 10-telescopic rod, 11-horizontal slide rail, 12-flotation tank, 13-beam slide rail, 14-beam transmitter, 15-detection slide rail, 16-flotation camera. DETAILED DESCRIPTION

[0040] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0042] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0043] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively a schematic diagram of the overall structure of the self-adjusting water purification control system according to an embodiment of the present invention, Figure 1 The enlarged view of part A, the overall structural block diagram and the structural block diagram of the non-settled suspended solids detection component. The self-adjusting water purification control system of the present invention comprises:

[0045] A sedimentation unit, used for gravity sedimentation of settleable suspended solids in sewage to obtain sewage to be floated, comprising a sedimentation tank 3, a water inlet assembly connected to the sedimentation tank 3 for introducing clean water into the sedimentation tank 3, a drainage assembly connected to the sedimentation tank 3 for discharging the sewage to be floated, and a turbidity meter probe 2 arranged above the drainage assembly for detecting the turbidity of the sewage to be floated;

[0046] A flotation unit, which is connected to the sedimentation unit and is used to float the non-settled suspended matter in the wastewater to be floated to the surface of the wastewater after flotation, comprises a flotation tank 12, an aeration assembly 8 arranged on the bottom surface of the flotation tank 12 for aerating the flotation tank 12, a salvaging assembly arranged above the aeration assembly 8 for scraping the non-settled suspended matter away from the flotation tank 12, and a non-settled suspended matter detection assembly arranged below the salvaging assembly for determining the content and depth of the non-settled suspended matter by detecting the scattering width of a parallel light beam;

[0047] A control unit, which is connected to the sedimentation unit and the air flotation unit, respectively, for determining the type of suspended matter according to the turbidity of the suspended matter in the sedimentation tank 3, determining the air flotation mode and the sedimentation mode according to the type of the suspended matter, and determining the vertical travel speed of the salvage assembly according to the content of the non-settled suspended matter;

[0048] The flotation method is to determine the salvaging depth of the scraper 9 according to the depth of the unsettled suspended matter in the wastewater to be floated; the sedimentation method is to adjust the volume of clean water discharged into the sedimentation tank 3 according to the turbidity of the wastewater to be floated.

[0049] Specifically, the water inlet components include:

[0050] A clean water pipe 4, which is connected to the inner wall of the sedimentation tank 3 and is used to transport clean water into the sedimentation tank 3;

[0051] The clean water stop valve 5 is connected to the clean water pipe 4 to control the opening and closing of the clean water pipe.

[0052] Specifically, the drainage components include:

[0053] A drainage pipe 7 connected to the inner wall of the sedimentation tank 3 to transport the wastewater to be floated in the sedimentation tank 3 to the floatation tank 12;

[0054] The sewage stop valve 6 is connected to the drain pipe 7 and is used to control the opening and closing of the drain pipe.

[0055] Specifically, the flotation process is to add flocculants into the flotation tank 12 to convert the suspended matter into flocs, and open the aeration assembly 8 to combine the flocs with bubbles to form a floc-bubble complex.

[0056] Specifically, the floccules are formed by adding flocculants into the flotation tank 12 , wherein examples of the flocculants include polyaluminium chloride, polyferric sulfate and polyacrylamide.

[0057] Specifically, the aeration component 8 is a bubble release machine.

[0058] Specifically, the air-floating camera 16 is an underwater industrial camera.

[0059] In practice, the system of the present invention is provided with a sedimentation unit, a flotation unit and a control unit. The sedimentation unit separates the settleable suspended matter in the sewage by gravity sedimentation, thereby reducing the suspended matter load in the subsequent treatment stage. The flotation unit further processes the non-settled suspended matter in the sewage after sedimentation, and the suspended matter is floated into flocs by the bubbles generated by the bubble machine. The accuracy of floc salvage is achieved through the coordinated work of the salvage component and the non-settled suspended matter detection component. The sedimentation effect is monitored in real time by providing a turbidity meter probe 2, so that the system can automatically adjust the input amount of clean water according to the turbidity of the sewage, thereby optimizing the entire sewage treatment process, and adjusting the salvage depth and the depth according to the type and amount of suspended matter. The descent speed is increased, thereby increasing the flotation efficiency of the suspended matter and improving the effectiveness of the salvage; due to the large content of suspended matter in the sewage, the density of the suspended matter in the sewage entering the sedimentation tank 3 is large, which leads to incomplete sedimentation of the sediment. The sewage is diluted with clean water to completely precipitate the sediment, thereby achieving the effectiveness of the sedimentation treatment of the sewage; due to the high concentration of suspended matter, too many flocs are formed, which are broken up by the salvage components during the salvage process. The broken up flocs will be suspended in the water, resulting in incomplete salvage, or due to the large particle size and mass of the suspended matter, the flotation degree does not meet the requirements, thereby increasing the difficulty of salvage. The descent speed of the salvage components is automatically adjusted according to the scattering width of the suspended matter, and the salvage depth is adjusted, thereby achieving the improvement of the flotation efficiency.

[0060] Specifically, the non-settled suspended matter detection component includes:

[0061] A detection slide rail 15, which is arranged on the inner wall of the air flotation tank 12 away from the aeration assembly 8, and is used to adjust the depth of the air flotation camera 16, wherein the inner wall where the detection slide rail 15 is located is parallel to the inner wall close to the aeration assembly 8;

[0062] An air-floating camera 16, which is connected to the detection slide rail 15 and is used to detect the scattering width of the parallel light beam;

[0063] A beam slide rail 13, which is arranged on the inner wall between the inner wall where the detection slide rail 15 is located and the inner wall close to the aeration assembly 8, for changing the depth of the beam emission position;

[0064] The light beam emitter 14 is connected to the light beam slide rail 13 and is used to emit a parallel light beam into the wastewater to be floated.

[0065] Specifically, the air-floating camera 16 and the light beam emitter 14 move in a follow-up relationship in the vertical direction, and the vertical heights of the air-floating camera 16 and the light beam emitter 14 are equal.

[0066] Specifically, the diameter of the parallel light beam emitted by the light beam emitter 14 is 4 cm.

[0067] Specifically, two underwater electric drivers (not shown in the figure) for controlling the upward and downward movement of the light beam emitter 14 and the air-floating camera 16 are respectively disposed on the light beam slide rail 13 and the detection slide rail 15 .

[0068] Specifically, the two underwater electric drivers are respectively provided with a single chip computer for controlling the underwater electric drivers to rotate synchronously for follow-up.

[0069] In practice, the system of the present invention is provided with a beam rail 13, a beam emitter 14 and an air flotation camera 16, and emits parallel beams at different depths of the air flotation tank 12, thereby detecting suspended matter at different depths, thereby more accurately controlling the air flotation process; the provision of the beam rail 13 allows the beam emitter 14 to move in the vertical direction to adapt to different water levels and suspended matter distribution conditions, ensuring that the beam can cover all areas in the air flotation tank 12. The parallel beam emitted by the beam emitter 14 is used in conjunction with the air flotation camera 16 to monitor the formation and distribution of floccules in real time, thereby improving the detection accuracy of suspended matter concentration.

[0070] Specifically, the salvage assembly includes:

[0071] A horizontal slide rail 11 is disposed above the flotation tank 12 to drive the scraper 9 to move horizontally on the sewage surface;

[0072] A telescopic rod 10, which is connected to the horizontal slide rail 11 and is used to adjust the salvage depth of the scraper 9;

[0073] A scraper 9 connected to the telescopic rod 10 and used to scrape the non-settled suspended matter out of the flotation tank 12;

[0074] The scraper 9 and the telescopic rod 10 are connected in a ball joint manner.

[0075] Specifically, the salvage components also include:

[0076] A translation motor (not shown), which is connected to the horizontal slide rail 11 and is used to provide driving force for the scraper 9;

[0077] The telescopic motor (not shown) is connected to the telescopic rod 10 and is used to control the telescopic rod 10 to extend and retract.

[0078] In practice, the system of the present invention ensures synchronous movement of the light beam transmitter 14 and the air flotation camera 16 in the air flotation tank 12 by setting a follow-up relationship between the air flotation camera 16 and the light beam transmitter, thereby improving the accuracy and continuity of suspended matter detection.

[0079] Specifically, the control unit is connected to the turbidity meter probe 2 and the drainage component respectively to obtain the turbidity of the sewage. If the turbidity is less than or equal to the preset first turbidity, the suspended matter type of the sewage to be floated is determined to be a floatable type, and the drainage component is opened.

[0080] Specifically, the control unit is respectively connected to the turbidity meter probe 2, the drainage component and the water inlet component, so as to lower the turbidity meter probe 2 to obtain the turbidity of the sewage to be floated when the sewage to be floated is discharged. If the turbidity is greater than or equal to the preset second turbidity, it is determined that the type of suspended matter in the sewage to be floated is a non-floatable type, and the drainage component is closed, while the water inlet component is opened to input clean water into the sedimentation tank 3.

[0081] Specifically, the preset first turbidity is smaller than the preset second turbidity.

[0082] Specifically, the volume of clean water input into the sedimentation tank 3 is the difference between the volume of the sedimentation tank 3 and the product of the lowering depth of the turbidity meter probe 2 and the bottom area of ​​the sedimentation tank 3 .

[0083] Specifically, one end of the turbidity meter probe 2 is connected to a rotating motor 1 for controlling the lowering height of the turbidity meter probe 2 , and one end of the turbidity meter probe 2 is connected to a turbidity meter panel (not shown) for obtaining and displaying turbidity.

[0084] Specifically, a liquid level meter for detecting the liquid level height of the aerated sewage is provided in the sedimentation tank 3 .

[0085] Specifically, the general value range of the preset first turbidity is [10NTU, 18NTU], and the general value range of the preset second turbidity is [85NTU, 100NTU].

[0086] Preferably, the first turbidity is set to 14 NTU, and the second turbidity is set to 92 NTU.

[0087] In practice, the system of the present invention sets a preset first turbidity and a preset second turbidity, monitors and adjusts the discharge of sewage and the input of clean water in real time. When the turbidity detected by the turbidity meter probe 2 is less than the preset value, the system will automatically open the drainage component to allow the sewage to enter the flotation tank 12 for further treatment; conversely, if the turbidity exceeds the preset value, the system will close the drainage component and open the water inlet component to input clean water into the sedimentation tank 3 to dilute the sewage, thereby improving the sedimentation effect; the system can automatically adjust the input amount of clean water according to the turbidity of the sewage to prevent the precipitable suspended matter suspended in the sewage from entering the flotation tank 12, thereby causing the flotation effect of the flotation tank 12 to decrease, thereby improving the sewage treatment accuracy.

[0088] Specifically, the control unit is connected to the salvage assembly and the air flotation camera 16, respectively, to obtain the average scattering width of the parallel light beam in the vertical direction. If the average scattering width is greater than the preset scattering width, it is determined that the content of the non-settled suspended solids does not meet the requirements, and the vertical descending speed of the scraper 9 is reduced.

[0089] The descending speed is positively correlated with the scattering width; the average scattering width is the average value of the beam scattering widths of several unit beam emission widths when the beam emitter 14 rises from the bottom of the flotation tank to the surface of the flotation tank.

[0090] Specifically, the scattering width of the parallel light beam in the vertical direction is the vertical length from the upper edge of the light beam to the lower edge of the light beam.

[0091] Specifically, the standard speed of the scraper 9 in the vertical direction is 1 m / s.

[0092] Specifically, the general value range of the preset scattering width is [4.6 cm, 5 cm].

[0093] Preferably, the preset scattering width is 4.8 cm.

[0094] In implementation, when the difference between the average scattering width and the preset scattering width is within 0.1 cm, the vertical descending speed of the scraper 9 is reduced to 0.9 times the original value; when the difference between the average scattering width and the preset scattering width exceeds 0.1, the vertical descending speed of the scraper 9 is reduced by 0.05 m / s for every 0.1 cm exceeded. For example, when the scattering width is 5.2 cm, the vertical descending speed of the scraper 9 is reduced to 1 m / s×0.9-0.05 m / s×3=0.75 m / s.

[0095] In practice, the system of the present invention sets a preset scattering width. Since the more suspended matter in the liquid, the larger the scattering range of the light beam, and the longer the scattering width of the light beam in the vertical direction, by detecting the scattering width, the content of suspended matter in the liquid can be intuitively detected, thereby judging whether the suspended matter has reached the conditions for flotation treatment. When the detected scattering width exceeds the preset value, it indicates that the content of suspended matter is too high. At this time, the system will automatically adjust the descending speed of the salvage component to slow down the salvage process, avoid the high content of flocs caused by the high content of suspended matter, and cause the flocs to be unable to float after the salvage component breaks up the flocs, thereby affecting the flotation efficiency. By reducing the descending speed of the scraper 9, the flocs are fully in contact with the scraper 9, thereby improving the salvage efficiency.

[0096] Specifically, the control unit is connected to the salvage assembly and the turbidity meter probe 2, respectively, to obtain the depth of the light beam transmitter that meets the preset scattering condition. If the depth of the light beam transmitter is greater than or equal to the preset depth, and the salvage depth of the scraper is determined according to the air flotation conversion height corresponding to the depth of the non-settled suspended matter, the preset scattering condition is the maximum scattering width of the parallel light beam in the vertical direction,

[0097] Among them, the depth is the depth in the flotation pool 12 when the flotation camera 16 detects the maximum scattering width; the salvage depth is positively correlated with the depth; the flotation conversion height is the flotation height that can be achieved by the aeration component 8 at maximum power to flot the non-settled suspended matter per unit depth.

[0098] Specifically, the unit depth is 4 cm.

[0099] Specifically, the salvage depth of the scraper 9 is equal to the air flotation conversion height corresponding to the depth of the unsettled suspended matter.

[0100] Specifically, the salvage depth of the scraper 9 is the height of the lower edge of the scraper 9 from the sewage surface after flotation.

[0101] Specifically, the preset depth is 0.625 times the depth of the flotation tank.

[0102] Specifically, the standard fishing depth of the scraper 9 is 0.2 m.

[0103] In practice, the system of the present invention sets a preset depth. Since the suspended matter particle size is too large, which will also lead to an increase in the light beam scattering range, when large-particle suspended matter or high-content suspended matter is at a deeper position in the flotation tank 12, it can be determined that the weight of the suspended matter in this area is large, resulting in a decrease in the flotation capacity, and then resulting in failure to completely float to the liquid surface. By detecting and increasing the salvage depth of the salvage component, the effectiveness of suspended matter salvage and the efficiency of sewage treatment are improved.

[0104] Specifically, the working process of the system of the present invention is as follows: sewage is released into the sedimentation tank 3 and allowed to settle. When the turbidity reaches a preset first turbidity, the drain pipe 7 is opened, and the turbidity meter probe 2 is lowered so that the turbidity meter probe 2 is always in the sewage to be floated. When the turbidity reaches a preset second turbidity, the drain pipe 7 is closed, the clean water pipe 4 is opened to release clean water, and allowed to settle. The remaining sewage to be floated in the sedimentation tank 3 is input into the flotation tank 12. The light beam transmitter 14 moves upward from the bottom of the flotation tank. The flotation camera 16 detects the scattering width of the parallel light beam to detect that the scattering width does not meet the requirements, or that the scattering width does not meet the requirements and the depth does not meet the requirements at the same time. Flocculant is added to the flotation tank 12, the aeration component 8 is opened, and the salvage component adjusts the vertical descending speed of the scraper 9 according to the detection result of the flotation camera 16, or adjusts the salvage depth, so as to salvage the flocculent-bubble complex out of the flotation tank 12.

[0105] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A self-adjusting water purification control system, characterized in that: include: A sedimentation unit, used for gravity sedimentation of settleable suspended solids in sewage to obtain sewage to be floated, comprising a sedimentation tank, a water inlet assembly connected to the sedimentation tank for introducing clean water into the sedimentation tank, a drainage assembly connected to the sedimentation tank for discharging the sewage to be floated, and a turbidity meter probe arranged above the drainage assembly for detecting the turbidity of the sewage to be floated; A flotation unit, which is connected to the sedimentation unit and is used to float the non-settled suspended matter in the wastewater to be floated to the surface of the wastewater after flotation, comprises a flotation tank, an aeration assembly arranged on the bottom of the flotation tank for aerating the flotation tank, a salvaging assembly arranged above the aeration assembly for scraping the non-settled suspended matter away from the flotation tank, and a non-settled suspended matter detection assembly arranged below the salvaging assembly for determining the content and depth of the non-settled suspended matter by detecting the scattering width of a parallel light beam; A control unit, which is connected to the sedimentation unit and the air flotation unit, respectively, for determining the type of suspended matter according to the turbidity of the suspended matter in the sedimentation tank, determining the air flotation mode and the sedimentation mode according to the type of the suspended matter, and determining the vertical travel speed of the salvage assembly according to the content of the non-settled suspended matter; Among them, the flotation method is to determine the salvage depth of the scraper according to the depth of the non-settled suspended matter in the wastewater to be flotated; the sedimentation method is to adjust the volume of clean water discharged into the sedimentation tank according to the turbidity of the wastewater to be flotated; The control unit is connected to the salvage assembly and the air flotation camera respectively to obtain the average scattering width of the parallel light beam in the vertical direction. If the average scattering width is greater than the preset scattering width, it is determined that the content of the non-settled suspended solids does not meet the requirements, and the vertical descending speed of the scraper is reduced. The descending speed is positively correlated with the scattering width; the average scattering width is the average value of the beam scattering widths of several unit beam emission widths when the beam emitter rises from the bottom of the flotation tank to the surface of the flotation tank.

2. The self-adjusting water purification control system according to claim 1, characterized in that: The non-settled suspended matter detection component comprises: A detection slide rail, which is arranged on the inner wall of the air flotation tank away from the aeration component, and is used to adjust the depth of the air flotation camera, wherein the inner wall where the detection slide rail is located is parallel to the inner wall close to the aeration component; An air-floating camera connected to the detection slide rail for detecting the scattering width of the parallel light beam; A beam slide rail, which is arranged on the inner wall between the inner wall where the detection slide rail is located and the inner wall close to the aeration assembly, for changing the depth of the beam emission position; The light beam emitter is connected to the light beam slide rail and is used for emitting a parallel light beam into the wastewater to be floated.

3. The self-adjusting water purification control system according to claim 2, characterized in that: The air-floating camera and the light beam emitter are in a follow-up relationship in the vertical direction, and the vertical heights of the air-floating camera and the light beam emitter are equal.

4. The self-adjusting water purification control system according to claim 3, characterized in that: The salvage assembly comprises: A horizontal slide rail, which is arranged above the flotation tank and is used to drive the scraper to move horizontally on the sewage surface; A telescopic rod connected to the horizontal slide rail for adjusting the salvage depth of the scraper; A scraper connected to the telescopic rod, used to scrape the non-settled suspended matter out of the flotation tank; Wherein, the scraper and the telescopic rod are connected in a ball joint manner.

5. The self-adjusting water purification control system according to claim 4, characterized in that: The control unit is connected to the turbidity meter probe and the drainage component respectively to obtain the turbidity of the sewage. If the turbidity is less than or equal to the preset first turbidity, the suspended matter type of the sewage to be floated is determined to be a floatable type, and the drainage component is opened.

6. The self-adjusting water purification control system according to claim 5, characterized in that: The control unit is respectively connected to the turbidity meter probe, the drainage component and the water inlet component, and is used to lower the turbidity meter probe to obtain the turbidity of the sewage to be floated when the sewage to be floated is discharged. If the turbidity is greater than or equal to a preset second turbidity, it is determined that the type of suspended matter in the sewage to be floated is a non-floatable type, and the drainage component is closed, while the water inlet component is opened to input clean water into the sedimentation tank.

7. The self-adjusting water purification control system according to claim 6, characterized in that: The preset first turbidity is smaller than the preset second turbidity.

8. The self-adjusting water purification control system according to claim 7, characterized in that: The volume of clean water input into the sedimentation tank is the difference between the volume of the sedimentation tank and the product of the lowering depth of the turbidity meter probe and the bottom area of ​​the sedimentation tank.

9. The self-adjusting water purification control system according to claim 8, characterized in that: The control unit is connected to the salvage assembly and the turbidity meter probe respectively to obtain the depth of the light beam transmitter that meets the preset scattering condition. If the depth of the light beam transmitter is greater than or equal to the preset depth, and the salvage depth of the scraper is determined according to the air flotation conversion height corresponding to the depth of the non-settled suspended matter, the preset scattering condition is the maximum scattering width of the parallel light beam in the vertical direction, Among them, the depth is the depth in the flotation pool when the flotation camera detects the maximum scattering width; the salvage depth is positively correlated with the depth in the flotation pool when the flotation camera detects the maximum scattering width; the flotation conversion height is the flotation height that can be achieved by flotating the non-settled suspended matter per unit depth by the aeration component at maximum power.

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