A control device and control method applicable to sludge discharge in a sedimentation tank

Abstract

This application relates to the technical field of sludge discharge, and discloses a control device and a control method suitable for sludge discharge in a sedimentation tank, including: a first metal pipe is arranged in the sedimentation tank, with a heating resistor inside, and both ends are respectively slidably connected to the two side walls of the sedimentation tank; a first motor drives the first metal pipe to move in the horizontal direction; an infrared thermal imaging camera obtains the thermal imaging image on the surface of the first metal pipe in real time; the control module is respectively connected to the first motor, the heating resistor, the infrared thermal imaging camera and the valve. During the movement of the first metal pipe, the infrared thermal imaging camera obtains the thermal imaging image of the first metal pipe in real time. The controller determines whether the sludge at the position of the first metal pipe reaches the position of the first metal pipe according to the thermal imaging image, and controls the valve at the sludge discharge port corresponding to the position of the first metal pipe to open according to the dim area of the thermal imaging image, realizing precise sludge discharge in the sedimentation tank, improving the poor sludge discharge effect of the sedimentation tank, and realizing automatic control to reduce the labor cost.

Description

Technical Field

[0001] This application relates to the technical field of sludge discharge, and particularly to a control device and a control method suitable for sludge discharge in sedimentation tanks. Background Art

[0002] The sedimentation tank is a very important process link in raw water pretreatment and sewage softening and clarification treatment. It is a purification device for removing large particle suspended matters, and the main principle is to utilize the natural sedimentation of particulate matters in water. Therefore, a lot of research and optimized designs have been made on the sedimentation effect of particulate matters in different sedimentation tanks. Among them, the sludge discharge effect of the sedimentation tank will directly affect the operation effect of the sedimentation tank. If the sludge volume is too large, the flocs in the water body cannot be precipitated in time and will be carried to the effluent; if the sludge volume is too small, the flocs cannot effectively form large particles and the sedimentation effect is also not good. Therefore, it is very important to accurately control the sludge discharge.

[0003] However, in the actual operation process, the sludge discharge part of the sedimentation tank is currently in a relatively primitive state. The operation of most sedimentation tanks relies on experience, that is, discharging sludge at fixed times and fixed shifts, resulting in the sludge discharge effect far from reaching the required level, thus affecting the operation effect of the sedimentation tank. At present, there are many ways to judge sludge discharge, such as the sludge concentration method, the food-to-microorganism ratio method, the sludge age method, etc., but the effects are not good. The sludge sedimentation ratio method is used more frequently. By taking samples and recording the volume ratio of clear water and sludge after sedimentation of mud and water per unit volume, the sludge sedimentation ratio is calculated to control the sludge discharge frequency of the sedimentation tank. The main drawbacks of the above methods are that the accumulation of sludge volume at different positions in the sedimentation tank is uneven, and the accumulation of sludge volume is uneven along the direction of water volume. The above methods cannot accurately discharge sludge according to the sludge volume in different areas of the sedimentation tank, resulting in poor sludge discharge effect of the sedimentation tank, and the above methods require manual participation and the labor cost is high.

[0004] Therefore, how to achieve accurate sludge discharge in the sedimentation tank, improve the poor sludge discharge effect of the sedimentation tank, and reduce the labor cost are the problems to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a control device and a control method suitable for sludge discharge in sedimentation tanks, which are used to solve the problems of inaccurate sludge discharge in sedimentation tanks, poor sludge discharge effect of sedimentation tanks, and high labor cost.

[0006] To solve the above technical problems, this application provides a control device suitable for sludge discharge in sedimentation tanks. A plurality of groups of sludge discharge port groups are arranged in sequence along the length direction of the bottom of the sedimentation tank at the bottom of the sedimentation tank. Each group of sludge discharge port groups includes a plurality of sludge discharge ports arranged in sequence along the width direction of the bottom of the sedimentation tank. A valve is provided at each sludge discharge port, including:

[0007] A first metal pipe is disposed in the sedimentation tank. Both ends of the first metal pipe are slidably connected to the two side walls of the sedimentation tank, and a heating resistor is provided inside the first metal pipe.

[0008] A first motor is connected to the first metal pipe and is used to drive the first metal pipe to move in the horizontal direction.

[0009] An infrared thermal imaging camera is disposed below the packing in the sedimentation area of the sedimentation tank and is used to obtain the thermal imaging image of the surface of the first metal pipe in real time.

[0010] A control module is connected to the first motor, the heating resistor, the infrared thermal imaging camera, and the valve respectively.

[0011] Optionally, it further includes a first cleaning ring and a second motor. The first cleaning ring is sleeved on the outer peripheral surface of the first metal pipe. The second motor is connected to the first cleaning ring and the control module respectively and is used to drive the first cleaning ring to slide in the length direction of the first metal pipe to clean the sludge covering the outer peripheral surface of the first metal pipe.

[0012] Optionally, it further includes a second metal pipe, a third motor, a second cleaning ring sleeved on the outer peripheral surface of the second metal pipe, and a fourth motor. The second metal pipe is located below the first metal pipe and is parallel to the first metal pipe. Both ends of the second metal pipe are slidably connected to the two side walls of the sedimentation tank. A heating resistor is provided inside the second metal pipe. The third motor is connected to the second metal pipe and the control module respectively and is used to drive the second metal pipe to move in the horizontal direction. The fourth motor is connected to the second cleaning ring and the control module respectively and is used to drive the second cleaning ring to slide in the length direction of the second metal pipe to clean the sludge covering the outer peripheral surface of the second metal pipe.

[0013] Optionally, a plurality of sludge discharge pipes are connected to the bottom of the sedimentation tank. The plurality of sludge discharge pipes are arranged in sequence along the moving direction of the first metal pipe, and a branch valve is provided on each sludge discharge pipe.

[0014] Optionally, first guide grooves, second guide grooves, third guide grooves, and fourth guide grooves are provided on the two side walls of the sedimentation tank. A first fixed clip is slidably connected to the first guide groove, a second fixed clip is slidably connected to the second guide groove, a third fixed clip is slidably connected to the third guide groove, and a fourth fixed clip is slidably connected to the fourth guide groove. Both ends of the first metal pipe are connected to the first fixed clip and the second fixed clip respectively. Both ends of the second metal pipe are connected to the third fixed clip and the fourth fixed clip respectively.

[0015] Optionally, the infrared thermal imaging camera is a waterproof camera, and a self-cleaning brush is provided on the mirror surface of the waterproof camera.

[0016] Optionally, a plurality of the heating resistors are uniformly distributed inside the first metal tube and the second metal tube.

[0017] The present application also provides a control method applicable to the sludge discharge of a sedimentation tank, which is applied to the above-mentioned control device applicable to the sludge discharge of a sedimentation tank, and includes:

[0018] Controlling a first motor to drive the first metal tube in the sedimentation tank to move horizontally;

[0019] Obtaining in real time a first thermal imaging image of the surface of the first metal tube captured by the infrared thermal imaging camera;

[0020] Judging whether each area in the current first thermal imaging image is clear;

[0021] If all areas in the current first thermal imaging image are dim, controlling the first motor to pause, determining the current position of the first metal tube corresponding to the current first thermal imaging image, and the target sludge discharge port group corresponding to the current position, and controlling the valves at all sludge discharge ports in the target sludge discharge port group to be opened to discharge sludge;

[0022] If some areas in the current first thermal imaging image are dim, controlling the first motor to pause, determining the target area that is dim in the current first thermal imaging image, and the target position of the first metal tube corresponding to the target area, determining the target sludge discharge port in the target sludge discharge port group according to the target position, and controlling the target valve at the target sludge discharge port to be opened to discharge sludge.

[0023] Optionally, after discharging the sludge, it further includes:

[0024] Controlling a second motor to drive a first cleaning ring to slide in the length direction of the first metal tube to clean the sludge covering the outer peripheral surface of the first metal tube, and obtaining in real time a second thermal imaging image of the surface of the first metal tube. After the second thermal imaging image is clear and complete, enter the step of controlling the first motor to drive the first metal tube in the sedimentation tank to move horizontally.

[0025] Optionally, when controlling the first motor to pause, it further includes:

[0026] Controlling a third motor to drive the second metal tube to move to a position directly below the current position where the first metal tube is located;

[0027] Control the fourth motor to drive the second cleaning ring to slide in the length direction of the second metal pipe to clean the sludge covering the outer peripheral surface of the second metal pipe, and obtain the third thermal imaging image of the surface of the second metal pipe in real time. When the third thermal imaging image is clear and complete, control the valve or the target valve to close.

[0028] A control device applicable to sludge discharge in a sedimentation tank provided by the present application. A plurality of groups of sludge discharge port groups are arranged in sequence along the length direction of the bottom of the sedimentation tank at the bottom of the sedimentation tank. Each group of sludge discharge port groups includes a plurality of sludge discharge ports arranged in sequence along the width direction of the bottom of the sedimentation tank. A valve is provided at each sludge discharge port, including: a first metal pipe disposed in the sedimentation tank, both ends of the first metal pipe are slidably connected to the two side walls of the sedimentation tank, and a heating resistor is provided inside the first metal pipe; a first motor connected to the first metal pipe for driving the first metal pipe to move in the horizontal direction; an infrared thermal imaging camera disposed below the packing in the sedimentation area of the sedimentation tank for obtaining the thermal imaging image of the surface of the first metal pipe in real time; a control module is connected to the first motor, the heating resistor, the infrared thermal imaging camera and the valve respectively. During the movement of the first metal pipe, the infrared thermal imaging camera obtains the thermal imaging image of the first metal pipe in real time. The controller can determine whether the sludge at the position of the first metal pipe reaches the height of the first metal pipe in the sedimentation tank according to the thermal imaging image, and can control the opening of the valve at the sludge discharge port corresponding to the position of the first metal pipe according to the dim area of the thermal imaging image, which can realize precise sludge discharge in the sedimentation tank, improve the poor sludge discharge effect of the sedimentation tank, effectively control the sludge volume at different areas in the sedimentation tank, and is automatically controlled, which can reduce the labor cost.

[0029] The beneficial effects of a control method applicable to sludge discharge in a sedimentation tank provided by the present application are corresponding to those of the device, and the effects are as above. Description of the Drawings

[0030] In order to more clearly illustrate the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a structural diagram of a control device applicable to sludge discharge in a sedimentation tank provided by an embodiment of the present application;

[0032] Figure 2 It is a top view of a control device applicable to sludge discharge in a sedimentation tank provided by an embodiment of the present application;

[0033] Figure 3Flow chart of a control method for sludge discharge from sedimentation tanks provided by an embodiment of the present application;

[0034] The reference numerals are as follows: 1 is a sedimentation tank, 2 is a sludge discharge port, 3 is a first metal pipe, 4 is a first motor, 5 is an infrared thermal imaging camera, 6 is a control module, 7 is a second metal pipe, 8 is a third motor, 9 is a first guide rail groove, 10 is a second guide rail groove, 11 is a third guide rail groove, 12 is a fourth guide rail groove, 13 is a branch valve, and 201 is a valve. Detailed implementation manners

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0036] The core of the present application is to provide a control device and a control method for sludge discharge from sedimentation tanks, which are used to achieve precise sludge discharge from sedimentation tanks, improve the poor sludge discharge effect of sedimentation tanks, and reduce labor costs.

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0038] Figure 1 Structural diagram of a control device for sludge discharge from sedimentation tanks provided by an embodiment of the present application, as Figure 1 shown, a control device for sludge discharge from sedimentation tanks, a plurality of groups of sludge discharge port groups are arranged in sequence along the length direction of the bottom of the sedimentation tank 1 at the bottom of the sedimentation tank 1, each group of sludge discharge port groups includes a plurality of sludge discharge ports 2 arranged in sequence along the width direction of the bottom of the sedimentation tank, and a valve 201 is provided at each sludge discharge port 2, including: a first metal pipe 3, arranged in the sedimentation tank 1, both ends of the first metal pipe 3 are slidably connected to the two side walls of the sedimentation tank 1, and a heating resistor is arranged in the first metal pipe 3; a first motor 4, connected to the first metal pipe 3, for driving the first metal pipe 3 to move in the horizontal direction; an infrared thermal imaging camera 5, the infrared thermal imaging camera 5 is arranged below the packing in the sedimentation area of the sedimentation tank 1, for real-time obtaining the thermal imaging image of the surface of the first metal pipe 3; a control module 6, respectively connected to the first motor 4, the heating resistor, the infrared thermal imaging camera 5 and the valve 201.

[0039] Before introducing the control device applicable to the sludge discharge of the sedimentation tank 1, the working principle of this application will be introduced below. Adopting the principle of directly contacting and adsorbing sludge, the sludge in the water body has strong adsorbability. When the metal pipe passes through the area with a higher sludge level, the surface of the metal pipe will be covered with sludge. How to judge whether the surface of the underwater metal pipe is covered with sludge is through the underwater infrared thermal imaging camera. A heating resistor is arranged inside the metal pipe, and the temperature is controlled at 35°C. When the outer wall of the metal pipe is clean and free of scale, the thermal imaging image is clear under the heating condition. When the surface is completely covered or slightly covered with sludge, it will affect the thermal imaging image on the surface of the metal pipe, and the thermal imaging image is dim. Therefore, it can be judged that the sludge height in this area reaches the critical point, and sludge can be discharged appropriately.

[0040] In the embodiment of this application, both ends of the first metal pipe 3 are slidably connected to the side wall of the sedimentation tank 1. The height of the first metal pipe 3 in the sedimentation tank 1 can be set according to the actual situation, that is, when the sludge height in the sedimentation tank 1 reaches the position where the first metal pipe 3 is located, the sedimentation tank 1 needs to discharge sludge appropriately. The first motor 4 is connected to the first metal pipe 3 to drive the first metal pipe 3 to move horizontally. Specifically, the moving direction of the first metal pipe 3 is the length direction of the bottom of the sedimentation tank 1, and the length direction of the first metal pipe 3 is consistent with the width direction of the bottom of the sedimentation tank 1. The infrared thermal imaging camera 5 obtains the thermal imaging image of the surface of the first metal pipe 3 in real time during the translation of the first metal pipe 3. Since the infrared thermal imaging camera 5 is arranged below the packing in the sedimentation area of the sedimentation tank 1, the infrared thermal imaging camera 5 is a waterproof camera. The infrared thermal imaging camera 5 includes a stainless steel metal shell and explosion-proof glass, etc. The waterproof level is not lower than IP68, and a self-cleaning brush is provided on the mirror surface of the infrared thermal imaging camera 5, which can clean the lens to facilitate obtaining the thermal imaging image of the surface of the first metal pipe 3. The control module 6 can adopt a Programmable Logic Controller (PLC). The control module 6 is respectively connected to the first motor 4, the heating resistor, the infrared thermal imaging camera 5 and the valve 201. The control module 6 controls the heating resistor to heat and controls the heating temperature at 30-40°C. The control module 6 obtains the thermal imaging image sent by the infrared thermal imaging camera 5 in real time and can control the corresponding valve 201 to open according to the thermal imaging image for sludge discharge. How to control the corresponding valve 201 to open according to the thermal imaging image will be introduced in detail below. Regarding the degree of sludge discharge, that is, when to control the valve 201 to close, a sensor can be set at the lower position of the first metal pipe 3. When it is detected that the sludge surface is at the position where the sensor is located, the valve 201 is controlled to close. Of course, there can also be other methods, which will not be listed one by one in the embodiment of this application.

[0041] A control device applicable to sludge discharge in a sedimentation tank provided by an embodiment of the present application. A plurality of groups of sludge discharge port groups are arranged in sequence along the length direction of the bottom of the sedimentation tank at the bottom of the sedimentation tank. Each group of sludge discharge port groups includes a plurality of sludge discharge ports arranged in sequence along the width direction of the bottom of the sedimentation tank. A valve is provided at each sludge discharge port, including: a first metal pipe disposed in the sedimentation tank, both ends of the first metal pipe are slidably connected to the two side walls of the sedimentation tank, and a heating resistor is provided in the first metal pipe; a first motor connected to the first metal pipe for driving the first metal pipe to move in the horizontal direction; an infrared thermal imaging camera disposed below the packing in the sedimentation area of the sedimentation tank for real-time acquisition of the thermal imaging image of the surface of the first metal pipe; a control module connected to the first motor, the heating resistor, the infrared thermal imaging camera and the valve respectively. During the movement of the first metal pipe, the infrared thermal imaging camera continuously acquires the thermal imaging image of the first metal pipe. The controller can determine whether the sludge at the position of the first metal pipe reaches the height of the first metal pipe in the sedimentation tank according to the thermal imaging image, and can control the opening of the valve at the sludge discharge port corresponding to the position of the first metal pipe according to the dim area of the thermal imaging image, which can realize precise sludge discharge in the sedimentation tank, improve the poor sludge discharge effect in the sedimentation tank, effectively control the sludge volume at different areas in the sedimentation tank, and is automatically controlled, which can reduce the labor cost.

[0042] Based on the above embodiment, to achieve automation and continuity, the embodiment of the present application further includes a first cleaning ring and a second motor. The first cleaning ring is sleeved on the outer peripheral surface of the first metal pipe 3. The second motor is respectively connected to the first cleaning ring and the control module 6 for driving the first cleaning ring to slide in the length direction of the first metal pipe 3 to clean the sludge covering the outer peripheral surface of the first metal pipe 3.

[0043] The embodiment of the present application does not specifically limit the materials of both the first cleaning ring and the first metal pipe 3. The first metal pipe 3 can be made of stainless steel, and the first cleaning ring can be made of rubber, which is not easy to damage the outer peripheral surface of the first metal pipe 3 when cleaning the first metal pipe 3. By providing the first cleaning ring and the second motor, the sludge on the surface of the first metal pipe 3 can be cleaned, so that the first metal pipe 3 can continue to move in the horizontal direction to detect the sludge level at other positions in the sedimentation tank.

[0044] Based on the above embodiments, the embodiments of the present application further include a second metal tube 7, a third motor 8, a second cleaning ring sleeved on the outer peripheral surface of the second metal tube 7, and a fourth motor. The second metal tube 7 is located below the first metal tube 3 and is parallel to the first metal tube 3. Both ends of the second metal tube 7 are slidably connected to the two side walls of the sedimentation tank 1. A heating resistor is provided inside the second metal tube 7. The third motor 8 is connected to both the second metal tube 7 and the control module 6 and is used to drive the second metal tube 7 to move in the horizontal direction. The fourth motor is connected to both the second cleaning ring and the control module 6 and is used to drive the second cleaning ring to slide in the length direction of the second metal tube 7 to clean the sludge covering the outer peripheral surface of the second metal tube 7.

[0045] The moving direction of the second metal tube 7 is the same as that of the first metal tube 3. A plurality of heating resistors are evenly distributed inside the first metal tube 3 and the second metal tube 7, so that the temperatures on the surfaces of the first metal tube 3 and the second metal tube 7 are uniform. When the thermal imaging image of the first metal tube 3 obtained by the infrared thermal imaging camera 5 is dim, the control module 6 controls the third motor 8 to drive the second metal tube 7 to move to a position directly below the first metal tube 3. During the sludge discharge process, the control module 6 controls the fourth motor to drive the second cleaning ring to slide in the length direction of the second metal tube 7. The infrared thermal imaging camera 5 continuously obtains the thermal imaging image of the second metal tube 7. Once the thermal imaging image of the second metal tube 7 is completely cleaned, the control module 6 controls the opened valve 201 to close. The number of infrared thermal imaging cameras 5 in the embodiments of the present application is not specifically limited. It can be one or two. The two infrared thermal imaging cameras 5 respectively obtain the thermal imaging images of the first metal tube 3 and the second metal tube 7. The second cleaning ring can also be made of rubber material. The second metal tube 7, like the first metal tube 3, is made of stainless steel. By providing the second metal tube 7, the third motor 8, the second cleaning ring sleeved on the outer peripheral surface of the second metal tube 7, and the fourth motor, the sludge discharge amount of the sedimentation tank 1 can be accurately controlled.

[0046] Based on the above embodiments, the embodiments of the present application introduce a way of slidably connecting the first metal tube 3 and the second metal tube 7 to the sedimentation tank 1. First guide grooves 9, second guide grooves 10, third guide grooves 11, and fourth guide grooves 12 are provided on both side walls of the sedimentation tank 1. A first fixed clip is slidably connected to the first guide groove 9, a second fixed clip is slidably connected to the second guide groove 10, a third fixed clip is slidably connected to the third guide groove 11, and a fourth fixed clip is slidably connected to the fourth guide groove 12. Both ends of the first metal tube 3 are respectively connected to the first fixed clip and the second fixed clip, and both ends of the second metal tube 7 are respectively connected to the third fixed clip and the fourth fixed clip.

[0047] As Figure 1As shown in the figure, the first guide groove 9 and the third guide groove 11 are located on the same side wall of the sedimentation tank 1. The third guide groove 11 is located below the first guide groove 9 and is parallel to the first guide groove 9. The second guide groove 10 and the fourth guide groove 12 are located on the same side wall of the sedimentation tank 1. The fourth guide groove 12 is located below the second guide groove 10 and is parallel to the second guide groove 10. The first guide groove 9 is located on the opposite side of the second guide groove 10, and the first guide groove 9 and the second guide groove 10 are at the same height. The third guide groove 11 is located on the opposite side of the fourth guide groove 12, and the third guide groove 11 and the fourth guide groove 12 are at the same height.

[0048] Based on the above embodiments, Figure 2 The top view of a control device suitable for sludge discharge from a sedimentation tank provided by an embodiment of the present application is shown in Figure 2 As shown in the figure, a plurality of sludge discharge pipes are further connected to the bottom of the sedimentation tank 1 of the embodiment of the present application. The plurality of sludge discharge pipes are arranged in sequence along the moving direction of the first metal pipe 3, and a branch valve 13 is provided on each sludge discharge pipe.

[0049] In the embodiment of the present application, no specific limitation is made on the branch valve 13, which can be an electric valve or a manual valve. If the branch valve 13 is an electric valve, the branch valve 13 is connected to the control module 6. When the valve 201 at the sludge discharge port 2 is blocked, the corresponding branch valve 13 can be controlled to open for sludge discharge. By setting the branch valve 13, the situation that the sedimentation tank 1 cannot discharge sludge smoothly when the valve 201 at the sludge discharge port 2 is blocked can be prevented.

[0050] Based on the above embodiments, Figure 3 The flowchart of a control method suitable for sludge discharge from a sedimentation tank provided by an embodiment of the present application is suitable for the control method of sludge discharge from a sedimentation tank and is applied to the above control device for sludge discharge from a sedimentation tank, including:

[0051] S10: Control the first motor to drive the first metal pipe in the sedimentation tank to move horizontally.

[0052] S11: Real-time obtain the first thermal imaging image on the surface of the first metal pipe captured by the infrared thermal imaging camera.

[0053] S12: Determine whether the regions in the current first thermal imaging image are clear; if all regions in the current first thermal imaging image are dim, then execute step S13; if some regions in the current first thermal imaging image are dim, then execute step S14.

[0054] S13: Control the first motor to pause, determine the current position of the first metal pipe corresponding to the current first thermal imaging image, and the target sludge discharge port group corresponding to the current position. Control the valves at all sludge discharge ports in the target sludge discharge port group to open to discharge sludge.

[0055] S14: Control the first motor to pause, determine the dim target area in the current first thermal imaging image, and the target position of the first metal pipe corresponding to the target area. Determine the target sludge discharge port in the target sludge discharge port group according to the target position, and control the target valve at the target sludge discharge port to open to discharge sludge.

[0056] As Figure 2 shown, for the convenience of introduction, multiple groups of sludge discharge port groups arranged in sequence along the length direction of the bottom of the sedimentation tank 1 are respectively denoted as A, B, C, and D; the sludge discharge ports in group A are denoted as A1, A2, and A3, the sludge discharge ports in group B are denoted as B1, B2, and B3, the sludge discharge ports in group C are denoted as C1, C2, and C3, and the sludge discharge ports in group D are denoted as D1, D2, and D3. The first metal pipe 3 can be divided into left, middle, and right three-section areas according to the sludge discharge ports. Taking Figure 2 a look, A1, B1, C1, and D1 correspond to the left section area of the first metal pipe 3, A2, B2, C2, and D2 correspond to the middle section area of the first metal pipe 3, and A3, B3, C3, and D3 correspond to the right section area of the first metal pipe 3. For example, when the first metal pipe 3 moves above the sludge discharge port group A and all areas of the current first thermal imaging image obtained by the infrared thermal imaging camera are dim at this time, open the valves 201 at all sludge discharge ports 2 in A1, A2, and A3 in group A; when a certain area of the current first thermal imaging image is dim, determine the target position of this area corresponding to the first metal pipe 3. For example, the target position is the left section area of the first metal pipe 3, and open the target valve at the target sludge discharge port A1 directly below this target position; if the current first thermal imaging image is clear and complete, continue to control the first motor 4 to drive the first metal pipe 3 in the sedimentation tank 1 to move horizontally.

[0057] When discharging sludge, control the third motor 8 to drive the second metal pipe 7 to move to a position directly below the current position of the first metal pipe 3; control the fourth motor to drive the second cleaning ring to slide in the length direction of the second metal pipe 7 to clean the sludge covering the outer peripheral surface of the second metal pipe 7, and obtain the third thermal imaging image of the surface of the second metal pipe 7 in real time. When the third thermal imaging image is clear and complete, control the valve 201 or the target valve to close. That is, when the mud surface of the sludge at the current position or a certain target position of the first metal pipe 3 in the sedimentation tank 1 is located below the second metal pipe 7, close the valve 201 or the target valve to pause sludge discharge.

[0058] After the sludge discharge is paused, it further includes: controlling the second motor to drive the first cleaning ring to slide in the length direction of the first metal pipe 3 to clean the sludge covering the outer peripheral surface of the first metal pipe 3, and obtaining the second thermal imaging image of the surface of the first metal pipe 3 in real time. After the second thermal imaging image is clear and complete, enter the step of controlling the first motor 4 to drive the first metal pipe 3 in the sedimentation tank 1 to move horizontally. After the sludge discharge is completed, in order to continue to detect whether the sludge in other areas of the sedimentation tank 1 has settled to the height where the first metal pipe 3 is located, the second motor can be used to drive the first cleaning ring to clean the sludge on the surface of the first metal pipe 3. After the second thermal imaging image is clear and complete, it means that the first metal pipe 3 has been completely cleaned, and the above steps are continuously cycled.

[0059] A control method applicable to the sludge discharge of a sedimentation tank provided by the present application is applied to the above-mentioned control device applicable to the sludge discharge of a sedimentation tank, and includes: controlling the first motor to drive the first metal pipe in the sedimentation tank to move horizontally; obtaining the first thermal imaging image of the surface of the first metal pipe taken by the infrared thermal imaging camera in real time; judging whether the regions in the current first thermal imaging image are clear; if all regions in the current first thermal imaging image are dim, controlling the first motor to pause, determining the current position of the first metal pipe corresponding to the current first thermal imaging image, and the target sludge discharge port group corresponding to the current position, and controlling the valves at all sludge discharge ports in the target sludge discharge port group to open to discharge sludge; if some regions in the current first thermal imaging image are dim, controlling the first motor to pause, determining the target region that is dim in the current first thermal imaging image, and the target position of the first metal pipe corresponding to the target region, determining the target sludge discharge port in the target sludge discharge port group according to the target position, and controlling the target valve at the target sludge discharge port to open to discharge sludge. During the movement of the first metal pipe, the infrared thermal imaging camera obtains the first thermal imaging image of the first metal pipe in real time, and the controller can determine whether the sludge at the position where the first metal pipe is located has reached the height of the first metal pipe in the sedimentation tank according to the first thermal imaging image, and can control the valve at the sludge discharge port corresponding to the position where the first metal pipe is located to open according to the dim region of the first thermal imaging image, which can realize the precise sludge discharge of the sedimentation tank, improve the poor sludge discharge effect of the sedimentation tank, effectively control the sludge volume at different regions in the sedimentation tank, and is automatically controlled, which can reduce the labor cost.

[0060] Taking advantage of the strong sludge adhesion ability, it can adsorb on the metal surface. Using a movable stainless steel metal pipe that can generate heat, it moves within the plane of the sedimentation area of the sedimentation tank at a certain height. If the sludge height in a certain characteristic area is relatively high, it will adsorb on the surface of the stainless steel metal pipe, affecting the heat conduction on the metal pipe surface, and thus being reflected in the image of the infrared thermal imaging camera. Based on this principle, the sedimentation area of the sedimentation tank is divided into regions. When the stainless steel metal pipe moves through a certain area, it can judge whether it reaches the warning height for sludge discharge through the thermal imaging image, and then perform separate sludge discharge for a certain area, realizing the precision, on-line, automation, and continuity of sedimentation tank sludge discharge, and achieving unattended operation. It avoids the disorderly and arbitrary operation mode of sedimentation tank sludge discharge, improves the efficiency of sedimentation tank sludge discharge, and helps to control the turbidity of the sedimentation tank effluent.

[0061] The above has introduced in detail a control device and a control method for sedimentation tank sludge discharge provided by this application. The various embodiments in the specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts between the various embodiments, reference can be made to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can still be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0062] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including an..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A control device applicable to the sludge discharge of a sedimentation tank. A plurality of groups of sludge discharge port groups are arranged in sequence along the length direction of the bottom of the sedimentation tank (1). Each group of sludge discharge port groups includes a plurality of sludge discharge ports (2) arranged in sequence along the width direction of the bottom of the sedimentation tank (1). A valve (201) is provided at each sludge discharge port (2), and it is characterized in that, Comprising: A first metal pipe (3) is disposed in the sedimentation tank (1). Both ends of the first metal pipe (3) are slidably connected to two side walls of the sedimentation tank (1). A heating resistor is provided inside the first metal pipe (3); A first motor (4) is connected to the first metal pipe (3) and is used to drive the first metal pipe (3) to move in the horizontal direction; An infrared thermal imaging camera (5) is disposed below the packing in the sedimentation area of the sedimentation tank (1) and is used to obtain the thermal imaging image on the surface of the first metal pipe (3) in real time; A control module (6) is respectively connected to the first motor (4), the heating resistor, the infrared thermal imaging camera (5) and the valve (201).

2. The control device applicable to the sludge discharge of the sedimentation tank according to claim 1, characterized in that, It further includes a first cleaning ring and a second motor. The first cleaning ring is sleeved on the outer peripheral surface of the first metal pipe (3). The second motor is respectively connected to the first cleaning ring and the control module (6) and is used to drive the first cleaning ring to slide in the length direction of the first metal pipe (3) so as to clean the sludge covering the outer peripheral surface of the first metal pipe (3).

3. The control device applicable to sedimentation tank sludge discharge according to claim 1, characterized in that, It further includes a second metal pipe (7), a third motor (8), a second cleaning ring sleeved on the outer peripheral surface of the second metal pipe (7) and a fourth motor. The second metal pipe (7) is located below the first metal pipe (3) and is parallel to the first metal pipe (3). Both ends of the second metal pipe (7) are slidably connected to two side walls of the sedimentation tank (1). A heating resistor is provided inside the second metal pipe (7). The third motor (8) is respectively connected to the second metal pipe (7) and the control module (6) and is used to drive the second metal pipe (7) to move in the horizontal direction. The fourth motor is respectively connected to the second cleaning ring and the control module (6) and is used to drive the second cleaning ring to slide in the length direction of the second metal pipe (7) so as to clean the sludge covering the outer peripheral surface of the second metal pipe (7).

4. The control device applicable to sedimentation tank sludge discharge according to claim 1, wherein, A plurality of sludge discharge pipes are further connected to the bottom of the sedimentation tank (1). The plurality of sludge discharge pipes are arranged in sequence along the moving direction of the first metal pipe (3). A branch valve (13) is provided on each sludge discharge pipe.

5. The control device applicable to sedimentation tank sludge discharge according to claim 3, characterized in that, First guide grooves (9), second guide grooves (10), third guide grooves (11) and fourth guide grooves (12) are provided on two side walls of the sedimentation tank (1). A first fixed clip is slidably connected to the first guide groove (9). A second fixed clip is slidably connected to the second guide groove (10). A third fixed clip is slidably connected to the third guide groove (11). A fourth fixed clip is slidably connected to the fourth guide groove (12). Both ends of the first metal pipe (3) are respectively connected to the first fixed clip and the second fixed clip. Both ends of the second metal pipe (7) are respectively connected to the third fixed clip and the fourth fixed clip.

6. The control device applicable to sludge discharge of a sedimentation tank according to claim 1, characterized in that, The infrared thermal imaging camera (5) is a waterproof camera, and a self-cleaning brush is provided on the mirror surface of the waterproof camera.

7. The control device applicable to sludge discharge of a sedimentation tank according to claim 3, characterized in that, A plurality of the heating resistors are uniformly distributed inside the first metal tube (3) and the second metal tube (7).

8. A control method applicable to sludge discharge of a sedimentation tank, characterized in that, Applied to the control device for sludge discharge of sedimentation tanks according to any one of claims 1 to 7, comprising: Controlling the first motor (4) to drive the first metal tube (3) inside the sedimentation tank (1) to move in the horizontal direction; Real-time acquiring a first thermal imaging image of the surface of the first metal tube (3) captured by the infrared thermal imaging camera (5); Judging whether each area in the current first thermal imaging image is clear; If all areas of the current first thermal imaging image are dim, controlling the first motor (4) to pause, determining the current position where the first metal tube (3) corresponding to the current first thermal imaging image is located, and the target sludge discharge port group corresponding to the current position, and controlling valves (201) at all sludge discharge ports (2) in the target sludge discharge port group to be opened to discharge sludge; If some areas of the current first thermal imaging image are dim, controlling the first motor (4) to pause, determining the target area that is dim in the current first thermal imaging image, and the target position of the first metal tube (3) corresponding to the target area, determining the target sludge discharge port in the target sludge discharge port group according to the target position, and controlling the target valve at the target sludge discharge port to be opened to discharge sludge.

9. The control method applicable to sedimentation tank sludge discharge according to claim 8, wherein After discharging the sludge, it further includes: Controlling the second motor to drive the first cleaning ring to slide in the length direction of the first metal tube (3) to clean the sludge covering the outer peripheral surface of the first metal tube (3), and real-time acquiring a second thermal imaging image of the surface of the first metal tube (3), and after the second thermal imaging image is clear and complete, entering the step of controlling the first motor (4) to drive the first metal tube (3) inside the sedimentation tank (1) to move in the horizontal direction.

10. The control method applicable to sludge discharge in a sedimentation tank according to claim 9, characterized in that, When controlling the first motor (4) to pause, it further includes: Controlling the third motor (8) to drive the second metal tube (7) to move to a position directly below the current position where the first metal tube (3) is located; Controlling the fourth motor to drive the second cleaning ring to slide in the length direction of the second metal tube (7) to clean the sludge covering the outer peripheral surface of the second metal tube (7), and real-time acquiring a third thermal imaging image of the surface of the second metal tube (7), and when the third thermal imaging image is clear and complete, controlling the valve (201) or the target valve to close.

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