Automatic control system for sewage treatment

Abstract

An automatic control system for sewage treatment comprises a grating filter box, an adjusting tank, an anaerobic tank, an aerobic tank, a flocculation tank and a water storage tank, and further comprises a mixer, a filter press and a PLC control cabinet, and the grating filter box, the adjusting tank, the anaerobic tank, the aerobic tank, the mixer, the flocculation tank, the filtering and purifying tank and the water storage tank are sequentially communicated; the flocculation tank is further connected with a second sludge pump, an outlet of the second sludge pump is communicated with the aerobic tank and the filter press respectively, and a water outlet of the filter press is communicated with the regulating tank; a water level sensor for monitoring the water level is arranged in the anaerobic tank, a water quality sensor is arranged in the aerobic tank, and a concentration sensor is arranged at the bottom in the flocculation tank; a defoaming device is laid at the upper end of a pool opening of the aerobic pool, and a plurality of defoaming soft heads facing the interior of the aerobic pool are arranged in the defoaming device. By arranging the defoaming device, foams generated in the aerobic tank can be eliminated, reduction of nitrogen and phosphorus removal efficiency is avoided, and meanwhile, environmental pollution caused by foam overflow is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to an automatic control system for sewage treatment. Background Art

[0002] Due to the rapid development of cities and industries, the water consumption in cities is increasing rapidly compared with the past, and a large amount of sewage is also produced. Sewage not only pollutes the environment, but also causes great waste of water resources. Therefore, people now treat sewage through sewage treatment systems, and the treated sewage is reused in industry and irrigation industries, which can also reduce the pollution of sewage to the environment; but when treating sewage, not only the visible impurities must be cleaned, but also the total nitrogen in the water must be treated. In the process of sewage denitrification, aerobic pools are degraded by nitrifying bacteria, but because the aerobic pool contains more active substances, a large amount of foam will be generated on the surface of the aerobic pool under the agitation of bubbles. If it is not cleaned in time, it will affect the activity of the water body, and even a large number of bubbles will overflow and cause pollution to the environment again.

[0003] For example, the invention disclosure patent with application number CN202211570022.2 discloses a sewage treatment pool that can quickly remove nitrogen and phosphorus, including a coupling pool, a chemical dephosphorization pool, a biological treatment pool and a clear water pool. The present invention is provided with a mesh isolation component for blocking sludge in the coupling pool, so that there is no need to set up a sedimentation tank for sludge precipitation and a device for sucking out the sludge backflow. It is only necessary to regularly remove the sludge in the coupling pool, which reduces the process steps and improves the sewage treatment efficiency. This sewage treatment pool that can quickly remove nitrogen and phosphorus is used for the entry of nitrification liquid and sewage through a mixing tube component. The mixing tube component can pre-mix sewage and refluxed nitrification liquid in a spiral mixing tube, so that the sewage entering the coupling pool is mixed with the nitrification liquid more completely, so that the dedicated denitrification microorganisms can better use the organic matter in the sewage as a carbon source to denitrify the nitrification liquid, and there is no need to mix and stir the sewage and nitrification liquid in the coupling pool for a long time, which reduces the reaction time in the coupling pool.

[0004] Although this type of sewage treatment pool that can quickly remove nitrogen and phosphorus can reduce the mixing and stirring time of sewage and nitrification liquid in the coupling tank through specialized denitrifying microorganisms, thereby reducing the reaction time in the coupling tank, foam will be generated during the denitrification and phosphorus removal work through sludge. The device lacks a foam cleaning device, and the generated foam is likely to reduce the efficiency of denitrification and phosphorus removal, and may also cause pollution to the environment. Summary of the invention

[0005] The purpose of the present invention is to provide an automated control system for sewage treatment, aiming to improve the problem that foam is generated during the denitrification and phosphorus removal work through sludge, which easily leads to a decrease in the efficiency of denitrification and phosphorus removal and may cause pollution to the environment.

[0006] The present invention is implemented as follows: an automatic control system for sewage treatment, comprising a grid filter box, a regulating tank, an anaerobic tank, an aerobic tank, a flocculation tank, and a water storage tank, and also comprising a mixer, a filter press and a PLC control cabinet, wherein the grid filter box, the regulating tank, the anaerobic tank, the aerobic tank, the mixer, the flocculation tank, the filtration and purification tank and the water storage tank are connected in sequence; the flocculation tank is also connected to a second sludge pump, the outlets of the second sludge pump are respectively connected to the aerobic tank and the filter press, and the water outlet of the filter press is connected to the regulating tank; a water level sensor for monitoring the water level is arranged in the anaerobic tank, a water quality sensor is arranged in the aerobic tank, and a concentration sensor is arranged at the bottom of the flocculation tank; a defoaming device is laid on the upper end of the aerobic tank port, and a plurality of defoaming soft heads facing the inside of the aerobic tank are arranged in the defoaming device.

[0007] Preferably, the grille filter box includes a large-mouth grille, a medium-mouth grille and a small-mouth grille, and the large-mouth grille, the medium-mouth grille and the small-mouth grille are arranged vertically and horizontally inside the grille filter box along the flow direction. The water inlet of the grille filter box is connected to an external sewage pipe, and the water outlet of the grille filter box is connected to a regulating tank.

[0008] Preferably, a water level sensor is provided inside the anaerobic tank, the water inlet of the anaerobic tank is connected to the outlet of the regulating tank through a first water pump, and the outlet of the anaerobic tank is connected to the water inlet of the aerobic tank through a second water pump.

[0009] Preferably, an aerator and a mixer are also included. The aerobic tank is also provided with an aerator, and the aerator includes an aeration main pipe, an aeration branch pipe, and an electromagnetic flow control valve. The air outlet of the aerator is connected to the aeration main pipe, and the aeration main pipe is provided with a plurality of aeration branch pipes in sequence around the aerobic tank. The aeration branch pipes are connected to the aerobic tank, and an electromagnetic flow control valve is provided in the aeration branch pipe; the water outlet of the aerobic tank is connected to a first sludge pump, and the outlet of the first sludge pump is respectively connected to the mixer and the anaerobic tank through pipelines.

[0010] Preferably, the first sludge pump includes a main pipeline and an internal circulation pipeline, the outlet of the first sludge pump is connected to a mixer through the main pipeline, the main pipeline is provided with an internal circulation pipeline, one end of the internal circulation pipeline away from the main pipeline is connected to the upper end of the anaerobic tank, and the outlet is arranged inside the anaerobic tank.

[0011] Preferably, it further includes a doser, the outlet of the doser is connected to a mixer, the outlet of the mixer is connected to a flocculation tank, the flocculation tank is provided with a water outlet and a sludge outlet, the water outlet is connected to a filtration purification tank, the sludge outlet is connected to a second sludge pump, and the outlet of the second sludge pump is respectively connected to an aerobic tank and a filter press.

[0012] Preferably, the outlet of the second sludge pump is connected to a three-way connector through a pipeline, and the other two ports of the three-way connector are respectively connected to branch pipe No. 1 and branch pipe No. 2, one end of branch pipe No. 1 away from the three-way connector is connected to the inlet end of the filter press, and one end of branch pipe No. 2 away from the three-way connector is connected to the aerobic tank, and electromagnetic switch valves are respectively provided on branch pipe No. 1 and branch pipe No. 2.

[0013] Preferably, the outlet of the filter press includes a liquid outlet and a solid outlet, and the liquid outlet is connected to a regulating tank.

[0014] Preferably, the debubble device comprises a support frame, a plurality of support springs, a debubble plate, a debubble soft head, a vibrator and a fixed spring; the support frame is adaptively mounted on the outer wall of the aerobic pool, the outer wall of the aerobic pool is provided with a limiting convex edge extending corresponding to the support frame, the lower end of the support frame abuts against the limiting convex edge, the upper end of the support frame is provided with a debubble plate through a support spring, the lower surface of the debubble plate is densely covered with a plurality of fixed springs, and the lower ends of the plurality of fixed springs are provided with debubble soft heads in a one-to-one correspondence.

[0015] Preferably, a sterilizer is also included, and the inside of the filtration and purification pool has activated carbon, quartz sand and pebbles from top to bottom in sequence. The water inlet of the filtration and purification pool is higher than the activated carbon setting and is connected to the water outlet of the flocculation pool. The water outlet of the filtration and purification pool is lower than the pebble setting and is connected to a water storage tank, and the water storage tank is also connected to a sterilizer.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can eliminate the foam generated in the aerobic pool by setting a defoaming device, thereby avoiding the reduction of the efficiency of nitrogen removal and phosphorus removal due to the generation of foam in the aerobic pool, and preventing the overflow of foam from causing environmental pollution.

[0018] 2. The present invention installs the debubbling device through the spring by providing a supporting spring and a fixing spring, and can amplify the vibration effect of the vibrator through the flexibility of the spring, thereby further improving the debubbling effect of the debubbling device.

[0019] 3. The present invention provides a three-way connector, through which the sludge in the flocculation tank can be selectively placed according to its sludge age. The sludge with low sludge age and use value can be transferred to the aerobic tank for secondary utilization, thereby reducing costs. The sludge without use value can be separated from the water by a filter press, thereby reducing the cost of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the assembly of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the grille filter box of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the aerator of the present invention;

[0023] Figure 4 It is a schematic diagram of the connection structure of the first sludge pump of the present invention;

[0024] Figure 5 It is a schematic diagram of the assembly structure of the aerobic pool of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the filtration purification pool of the present invention;

[0026] Figure 7 It is a schematic structural diagram of the defoaming device of the present invention;

[0027] Figure 8 It is a schematic cross-sectional view of the defoaming device of the present invention.

[0028] In the figure: 1. Grid filter box; 101. Large-mouth grid; 102. Medium-mouth grid; 103. Small-mouth grid; 2. Regulating tank; 3. Anaerobic tank; 301. Water level sensor; 4. Second water pump; 5. Aerobic tank; 501. Limiting convex edge; 502. Water quality sensor; 6. Aerator; 601. Aeration main pipe; 602. Aeration branch pipe; 603. Electromagnetic flow control valve; 7. First sludge pump; 701. Main pipeline; 702. Internal circulation pipeline; 8. Mixer; 9. Doser; 10. Flocculation tank; 1001. Concentration sensor; 11. Second sludge pump; 12 , filtration and purification tank; 1201, activated carbon; 1202, quartz sand; 1203, pebbles; 13, water storage tank; 14, sterilizer; 15, filter press; 1501, solid outlet; 1502, liquid outlet; 16, three-way connector; 1601, No. 1 branch; 1602, No. 2 branch; 17, electromagnetic switch valve; 18, first water pump; 19, PLC control cabinet; 20, defoaming device; 2001, support frame; 2002, support spring; 2003, defoaming plate; 2004, defoaming soft head; 2005, vibrator; 2006, fixing spring. DETAILED DESCRIPTION

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0031] Example 1

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, an automatic control system for sewage treatment includes a grille filter box 1, a regulating tank 2, an anaerobic tank 3, an aerobic tank 5, a flocculation tank 10, and a water storage tank 13, and also includes a mixer 8, a filter press 15 and a PLC control cabinet 19. The grille filter box 1, the regulating tank 2, the anaerobic tank 3, the aerobic tank 5, the mixer 8, the flocculation tank 10, the filtration and purification tank 12 and the water storage tank 13 are connected in sequence; the grille filter box 1 includes a large-mouth grille 101, a middle-mouth grille 102 and a small-mouth grille 103, and the large-mouth grille 101, the middle-mouth grille 102 and the small-mouth grille 103 are arranged vertically and horizontally inside the grille filter box 1 along the flow direction. When sewage passes through the grille filter box 1, the large-mouth grille 101, the middle-mouth grille 102 and the small-mouth grille 103 inside the grille filter box 1 filter the solid pollutants inside the grille filter box 1 in sequence; the water inlet of the grille filter box 1 is connected to the external sewage pipe, and the grille filter The water outlet of the box 1 is connected to the regulating tank 2; a water level sensor 301 for monitoring the water level is provided in the anaerobic tank 3, a water level sensor 301 is provided inside the anaerobic tank 3, a water inlet of the anaerobic tank 3 is connected to the outlet of the regulating tank 2 through a first water pump 18, and the outlet of the anaerobic tank 3 is connected to the water inlet of the aerobic tank 5 through a second water pump 4; a water quality sensor 502 is provided in the aerobic tank 5 for monitoring the real-time state of the water quality in the aerobic tank 5, and also includes an aerator 6 and a mixer 8. The aerobic tank 5 is also provided with an aerator 6, the aerator 6 includes an aeration main pipe 601, an aeration branch pipe 602, and an electromagnetic flow control valve 603. The air outlet of the aerator 6 is connected to the aeration main pipe 601, and the aeration main pipe 601 is sequentially provided with a plurality of aeration branch pipes 602 around the aerobic tank 5. The aeration branch pipe 602 is connected to the aerobic tank 5, and an electromagnetic flow control valve 603 is provided in the aeration branch pipe 602, so that the aeration degree can be adjusted in time.

[0033] like Figure 1 and Figure 4 As shown, the outlet of the aerobic tank 5 is connected to the first sludge pump 7, and the outlet of the first sludge pump 7 is connected to the mixer 8 and the anaerobic tank 3 through pipelines respectively; the first sludge pump 7 includes a main pipeline 701 and an internal circulation pipeline 702, and the outlet of the first sludge pump 7 is connected to the mixer 8 through the main pipeline 701, and a part of the sewage is transported to the mixer 8, and after mixing with the flocculant, it is transported to the flocculation tank 10 for precipitation, and the main pipeline 701 is provided with an internal circulation pipeline 702, and the end of the internal circulation pipeline 702 away from the main pipeline 701 is connected to the upper end of the anaerobic tank 3, and the outlet is arranged inside the anaerobic tank 3, so that a part of the sewage that has undergone nitrification reaction can be returned to the anaerobic tank 3 for denitrification reaction; it also includes a doser 9, and the outlet of the doser 9 The outlet of the mixer 8 is connected to the mixer 8, the outlet of the mixer 8 is connected to the flocculation tank 10, the flocculation tank 10 is provided with a water outlet and a sludge outlet, the water outlet is connected to the filtration purification tank 12, the sludge outlet is connected to the second sludge pump 11, and the outlet of the second sludge pump 11 is respectively connected to the aerobic tank 5 and the filter press 15; the outlet of the second sludge pump 11 is connected to the three-way connector 16 through a pipeline, and the other two ports of the three-way connector 16 are respectively connected to the first branch pipe 1601 and the second branch pipe 1602, the end of the first branch pipe 1601 away from the three-way connector 16 is connected to the inlet end of the filter press 15, and the end of the second branch pipe 1602 away from the three-way connector 16 is connected to the aerobic tank 5, and the first branch pipe 1601 and the second branch pipe 1602 are respectively provided with electromagnetic switch valves 17.

[0034] like Figure 1 and Figure 5-Figure 8As shown, the flocculation tank 10 is also connected to a second sludge pump 11, and the outlets of the second sludge pump 11 are respectively connected to the aerobic tank 5 and the filter press 15, and the water outlet of the filter press is connected to the regulating tank 2; a concentration sensor 1001 is arranged at the bottom of the flocculation tank 10; a defoaming device 20 is laid on the upper end of the aerobic tank 5, and a plurality of defoaming soft heads 2004 facing the inside of the aerobic tank 5 are arranged in the defoaming device 20; the outlet of the filter press 15 includes a liquid outlet 1502 and a solid outlet 1501, and the liquid outlet 1502 is connected to the regulating tank 2; the defoaming device 20 includes a support frame 2001, a plurality of support springs 2002, a defoaming plate 2003, a defoaming soft head 2004, a vibrator 2005 and a fixing spring 2006; the support frame 2001 is suitably mounted on the outer wall of the aerobic tank 5, and the outer wall of the aerobic tank 5 is opposite to the The support frame 2001 is extended to be provided with a limiting convex edge 501, the lower end of the support frame 2001 abuts against the limiting convex edge 501, the upper end of the support frame 2001 is installed with a debubble plate 2003 through a support spring 2002, the lower surface of the debubble plate 2003 is densely covered with a plurality of fixed springs 2006, and the lower ends of the plurality of fixed springs 2006 are provided with debubble soft heads 2004 in a one-to-one correspondence; it also includes a sterilizer 14, and the inside of the filtration and purification pool 12 is provided with activated carbon 1201, quartz sand 1202 and pebbles 1203 from top to bottom, the water inlet position of the filtration and purification pool 12 is higher than the activated carbon 1201, and is connected to the water outlet of the flocculation pool 10, the water outlet of the filtration and purification pool 12 is lower than the pebbles 1203, and is connected to the water storage tank 13, and the water storage tank 13 is also connected to the sterilizer 14.

[0035] Example 2

[0036] like Figure 1 , Figure 2 and Figure 3As shown, an automated control system for sewage treatment comprises a grille filter box 1, a regulating tank 2, an anaerobic tank 3, an aerobic tank 5, a flocculation tank 10, and a water storage tank 13, and also comprises a mixer 8, a filter press 15 and a PLC control cabinet 19. The grille filter box 1, the regulating tank 2, the anaerobic tank 3, the aerobic tank 5, the mixer 8, the flocculation tank 10, the filtration purification tank 12 and the water storage tank 13 are sequentially connected; the grille filter box 1 comprises a large-mouth grille 101, a middle-mouth grille 102 and a small-mouth grille 103, which are arranged vertically and horizontally inside the grille filter box 1 along the flow direction, the water inlet of the grille filter box 1 is connected to an external sewage pipe, and the water outlet of the grille filter box 1 is connected to the regulating tank 2; the flocculation tank 10 is also connected to a second sludge pump 11, and the outlets of the second sludge pump 11 are respectively connected to the aerobic The anaerobic tank 3 is provided with a water level sensor 301 for monitoring the water level, and the anaerobic tank 3 is provided with a water level sensor 301 inside. The water inlet of the anaerobic tank 3 is connected to the outlet of the regulating tank 2 through the first water pump 18, and the outlet of the anaerobic tank 3 is connected to the water inlet of the aerobic tank 5 through the second water pump 4. The aerobic tank 5 is provided with a water quality sensor 502, and also includes an aerator 6 and a mixer 8. The aerobic tank 5 is also provided with an aerator 6, and the aerator 6 includes an aeration main pipe 601, an aeration branch pipe 602, and an electromagnetic flow control valve 603. The air outlet of the aerator 6 is connected to the aeration main pipe 601, and the aeration main pipe 601 is provided with a plurality of aeration branch pipes 602 in sequence around the aerobic tank 5. The aeration branch pipe 602 is connected to the aerobic tank 5, and the electromagnetic flow control valve 603 is provided in the aeration branch pipe 602.

[0037] like Figure 1 and Figure 4As shown, the water outlet of the aerobic tank 5 is connected to the first sludge pump 7, and the outlet of the first sludge pump 7 is connected to the mixer 8 and the anaerobic tank 3 through pipelines respectively; the first sludge pump 7 includes a main pipeline 701 and an internal circulation pipeline 702, and the outlet of the first sludge pump 7 is connected to the mixer 8 through the main pipeline 701, and the main pipeline 701 is provided with an internal circulation pipeline 702, and the end of the internal circulation pipeline 702 away from the main pipeline 701 is connected to the upper end of the anaerobic tank 3, and the outlet is arranged inside the anaerobic tank 3; in addition, it also includes a doser 9, the outlet of the doser 9 is connected to the mixer 8, and the outlet of the mixer 8 is connected to the flocculation tank 10, and the flocculation tank 10 is provided with a water outlet and The sludge outlet and the water outlet are connected to the filtration and purification tank 12, the sludge outlet is connected to the second sludge pump 11, and the outlet of the second sludge pump 11 is respectively connected to the aerobic tank 5 and the filter press 15; the outlet of the second sludge pump 11 is connected to the three-way connector 16 through a pipeline, and the other two ports of the three-way connector 16 are respectively connected to the first branch pipe 1601 and the second branch pipe 1602, the end of the first branch pipe 1601 away from the three-way connector 16 is connected to the inlet end of the filter press 15, and the end of the second branch pipe 1602 away from the three-way connector 16 is connected to the aerobic tank 5, and the first branch pipe 1601 and the second branch pipe 1602 are respectively provided with electromagnetic switch valves 17.

[0038] like Figure 1 and Figure 5-Figure 8As shown, a concentration sensor 1001 is provided at the bottom of the flocculation tank 10; a defoaming device 20 is provided at the upper end of the aerobic tank 5, and a plurality of defoaming soft heads 2004 facing the inside of the aerobic tank 5 are provided in the defoaming device 20; the outlet of the filter press 15 includes a liquid outlet 1502 and a solid outlet 1501, and the liquid outlet 1502 is connected to the regulating tank 2; the defoaming device 20 includes a support frame 2001, a plurality of support springs 2002, a defoaming plate 2003, a defoaming soft head 2004, a vibrator 2005 and a fixing spring 2006; the support frame 2001 is adaptively mounted on the outer wall of the aerobic tank 5, and a limiting convex edge 501 is extended from the outer wall of the aerobic tank 5 corresponding to the support frame 2001, and the lower end of the support frame 2001 abuts against the limiting convex edge 501, and the upper end of the support frame 2001 is installed with a defoaming plate 20 through the support spring 2002. 03, the lower surface of the defoaming plate 2003 is densely covered with a plurality of fixed springs 2006, and the lower ends of the plurality of fixed springs 2006 are provided with defoaming soft heads 2004 in a one-to-one correspondence, and the vibrator 2005 is installed at the upper end of the support frame 2001, and the support frame 2001 is vibrated by the vibrator 2005. At the same time, the support frame is elastically supported by the support springs 2002, and the vibration effect can be elastically amplified by the support springs 2002; it also includes a sterilizer 14, and the inside of the filtration and purification pool 12 has activated carbon 1201, quartz sand 1202 and pebbles 1203 from top to bottom, the water inlet of the filtration and purification pool 12 is higher than the activated carbon 1201, and is connected to the water outlet of the flocculation pool 10, the water outlet of the filtration and purification pool 12 is lower than the pebbles 1203, and is connected to the water storage tank 13, and the water storage tank 13 is also connected to the sterilizer 14.

[0039] The working principle of the present invention is as follows: the sewage enters the grid filter box 1 and passes through the large-mouth grid 101, the middle-mouth grid 102 and the small-mouth grid 103 to filter the solid pollutants in sequence, and then the filtered sewage is transported to the regulating tank 2 to neutralize the sewage, and then the denitrification reaction is carried out through the anaerobic tank 3, and the nitrification reaction is carried out through the aerobic tank 5. At the same time, the aerobic tank 5 is aerated by the aerator to further promote the reaction effect. During the reaction process, the support frame 2001 vibrates through the vibrator 2005, driving the fixed spring 2006 and the defoaming soft head 2004 to vibrate, breaking the foam generated in the aerobic tank 5 to prevent too much foam from affecting the nitrification reaction. When the nitrification reaction is completed, the first sludge pump 7 transports part of the sewage mixed with the sludge in the aerobic tank 5 to the mixer 8 to prepare for flocculation, and the other part is returned to the anaerobic tank 3 for flocculation. The denitrification reaction provides nitrate; the sewage entering the mixer 8 is mixed with the flocculant and then enters the flocculation tank 10 for precipitation. When the concentration sensor 1001 in the flocculation tank 10 detects that the precipitation is completed, the precipitated water is transported to the filtration and purification tank 12 for filtration. The filtered water is disinfected and enters the water storage tank 13; at the same time, the second sludge pump 11 extracts the sludge precipitated in the flocculation tank 10, and then, depending on whether the sludge can be further recycled, the sludge that cannot be further used is transported to the filter press 15 through the No. 1 branch pipe 1601 and the opening of the corresponding electromagnetic switch valve 17 for mud-water separation. At the same time, the separated water can be continuously put into the regulating tank for purification; the sludge that can be further used is transported to the aerobic tank 5 through the No. 2 branch pipe 1602 and the opening of the corresponding electromagnetic switch valve 17 for secondary utilization.

[0040] In summary, the present invention can eliminate the foam generated in the aerobic tank 5 by setting the defoaming device 20, avoid the reduction of the efficiency of denitrification and dephosphorization due to the generation of foam in the aerobic tank 5, and prevent the foam from overflowing and causing environmental pollution; by setting the supporting spring 2002 and the fixing spring 2006, the defoaming device 20 is installed by the spring, and the vibration effect of the vibrator 2005 can be expanded by the flexibility of the spring, and the defoaming effect of the defoaming device 20 is further improved; by setting the three-way connector 16, the sludge in the flocculation tank 10 can be selectively put into the flocculation tank 10 according to its sludge age through the three-way connector 16, and the sludge with low sludge age and use value can be transferred to the aerobic tank 5 for secondary utilization, thereby reducing the cost, and the sludge with no use value can be separated from the mud by the filter press 15, thereby reducing the cost of sewage treatment.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automated control system for sewage treatment, comprising a grid filter box (1), a regulating tank (2), an anaerobic tank (3), an aerobic tank (5), a flocculation tank (10), and a water storage tank (13), characterized in that: The invention also comprises a mixer (8), a filter press (15) and a PLC control cabinet (19); the grid filter box (1), the regulating tank (2), the anaerobic tank (3), the aerobic tank (5), the mixer (8), the flocculation tank (10), the filtration purification tank (12) and the water storage tank (13) are connected in sequence; the flocculation tank (10) is also connected to a second sludge pump (11); the outlets of the second sludge pump (11) are respectively connected to the aerobic tank (5) and the filter press (15 ... The water outlet of the filter is connected to the regulating tank (2); the anaerobic tank (3) is provided with a water level sensor (301) for monitoring the water level, the aerobic tank (5) is provided with a water quality sensor (502), and the bottom of the flocculation tank (10) is provided with a concentration sensor (1001); a defoaming device (20) is provided at the upper end of the aerobic tank (5) outlet, and the defoaming device (20) is provided with a plurality of defoaming soft heads (2004) facing the inside of the aerobic tank (5).

2. An automated control system for sewage treatment according to claim 1, characterized in that: The grid filter box (1) comprises a large-mouth grid (101), a medium-mouth grid (102) and a small-mouth grid (103); the large-mouth grid (101), the medium-mouth grid (102) and the small-mouth grid (103) are arranged vertically and horizontally inside the grid filter box (1) along the flow direction; the water inlet of the grid filter box (1) is connected to an external sewage pipe, and the water outlet of the grid filter box (1) is connected to a regulating tank (2).

3. The automatic control system for sewage treatment according to claim 1, characterized in that: A water level sensor (301) is arranged inside the anaerobic tank (3); the water inlet of the anaerobic tank (3) is connected to the outlet of the regulating tank (2) through a first water pump (18); and the outlet of the anaerobic tank (3) is connected to the water inlet of the aerobic tank (5) through a second water pump (4).

4. The automatic control system for sewage treatment according to claim 1, characterized in that: The aerobic tank (5) further comprises an aerator (6) and a mixer (8). The aerobic tank (5) is further provided with an aerator (6). The aerator (6) comprises an aeration main pipe (601), an aeration branch pipe (602), and an electromagnetic flow control valve (603). The air outlet of the aerator (6) is connected to the aeration main pipe (601). The aeration main pipe (601) is provided with a plurality of aeration branch pipes (602) in sequence around the aerobic tank (5). The aeration branch pipes (602) are connected to the aerobic tank (5). The electromagnetic flow control valve (603) is provided in the aeration branch pipe (602). The water outlet of the aerobic tank (5) is connected to a first sludge pump (7). The outlet of the first sludge pump (7) is respectively connected to the mixer (8) and the anaerobic tank (3) through pipelines.

5. An automatic control system for sewage treatment according to claim 4, characterized in that: The first sludge pump (7) comprises a main pipeline (701) and an internal circulation pipeline (702); the outlet of the first sludge pump (7) is connected to a mixer (8) via the main pipeline (701); an internal circulation pipeline (702) is provided on the main pipeline (701); one end of the internal circulation pipeline (702) away from the main pipeline (701) is connected to the upper end of the anaerobic tank (3), and the outlet is arranged inside the anaerobic tank (3).

6. The automatic control system for sewage treatment according to claim 1, characterized in that: The invention also comprises a doser (9), the outlet of the doser (9) is connected to a mixer (8), the outlet of the mixer (8) is connected to a flocculation tank (10), the flocculation tank (10) is provided with a water outlet and a sludge outlet, the water outlet is connected to a filtration purification tank (12), the sludge outlet is connected to a second sludge pump (11), and the outlet of the second sludge pump (11) is respectively connected to an aerobic tank (5) and a filter press (15).

7. An automated control system for sewage treatment according to claim 6, characterized in that: The outlet of the second sludge pump (11) is connected to a three-way connector (16) through a pipeline, and the other two ports of the three-way connector (16) are respectively connected to a first branch pipe (1601) and a second branch pipe (1602), one end of the first branch pipe (1601) away from the three-way connector (16) is connected to the inlet end of the filter press (15), and one end of the second branch pipe (1602) away from the three-way connector (16) is connected to the aerobic tank (5), and the first branch pipe (1601) and the second branch pipe (1602) are respectively provided with electromagnetic switch valves (17).

8. The automatic control system for sewage treatment according to claim 1, characterized in that: The outlet of the filter press (15) comprises a liquid outlet (1502) and a solid outlet (1501), and the liquid outlet (1502) is connected to the regulating tank (2).

9. The automatic control system for sewage treatment according to claim 1, characterized in that: The defoaming device (20) comprises a support frame (2001), a plurality of support springs (2002), a defoaming plate (2003), a defoaming soft head (2004), a vibrator (2005) and a fixing spring (2006); the support frame (2001) is suitably mounted on the outer wall of the aerobic pool (5); a limiting convex edge (501) is extended and arranged on the outer wall of the aerobic pool (5) corresponding to the support frame (2001); the lower end of the support frame (2001) abuts against the limiting convex edge (501); the upper end of the support frame (2001) is provided with a defoaming plate (2003) via the support spring (2002); the lower surface of the defoaming plate (2003) is densely paved with a plurality of fixing springs (2006); and the lower ends of the plurality of fixing springs (2006) are provided with defoaming soft heads (2004) in a one-to-one correspondence.

10. The automatic control system for sewage treatment according to claim 1, characterized in that: The invention also comprises a sterilizer (14). The interior of the filtering and purifying pool (12) has activated carbon (1201), quartz sand (1202) and pebbles (1203) in order from top to bottom. The water inlet of the filtering and purifying pool (12) is arranged higher than the activated carbon (1201) and is connected to the water outlet of the flocculation pool (10). The water outlet of the filtering and purifying pool (12) is arranged lower than the pebbles (1203) and is connected to the water storage tank (13). The water storage tank (13) is also connected to the sterilizer (14).

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