Chemical phosphorus removal device and method for sewage

Abstract

The invention discloses a sewage chemical phosphorus removal device and method, and relates to the technical field of sewage treatment. The sewage chemical phosphorus removal device comprises an aeration tank, a first sedimentation tank, a phosphorus removal tank, a conveying pipe, a stirring tank, a second sedimentation tank and a feedback regulation unit, the first sedimentation tank is communicated with the aeration tank, a conveying groove is formed in the bottom of the first sedimentation tank, the dephosphorization tank is connected to the top of the conveying groove and divided into an anaerobic bin and a mixing bin, the input end of a conveying pipe is connected with a hopper, the output end of the conveying pipe corresponds to the stirring tank, the second sedimentation tank is communicated with the stirring tank and the aeration tank, and a conveying rod is arranged in the conveying groove and used for conveying sludge; the feedback adjusting unit comprises a detection module, a control module and an execution module and can adjust processing parameters in real time. The sewage treatment integrated process is achieved, the thoroughness of the phosphorus removal reaction is improved through multi-stage stirring, the feedback adjusting system can adjust treatment parameters in real time, it is guaranteed that the phosphorus removal effect is stable, and the treatment cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a sewage chemical phosphorus removal device and method thereof. BACKGROUND

[0002] With the acceleration of industrialization and urbanization, a large amount of phosphorus-containing sewage is discharged into the natural environment, leading to the increasingly prominent problem of water eutrophication, causing a series of environmental problems such as blue-green algae outbreak and water quality deterioration, which seriously threatens the ecological balance and human health. Therefore, effective removal of phosphorus in sewage is one of the key links in the sewage treatment process.

[0003] At present, sewage phosphorus removal technologies mainly include biological phosphorus removal and chemical phosphorus removal. Biological phosphorus removal technology is greatly affected by environmental factors such as water quality and water temperature, and the phosphorus removal effect is unstable; chemical phosphorus removal technology generates insoluble precipitates by adding chemical agents to sewage, and then realizes phosphorus removal through precipitation separation, which has the advantages of high phosphorus removal efficiency and stable effect, and is widely used in various sewage treatment projects.

[0004] However, the existing chemical phosphorus removal device has the following defects: the mixture of sludge and phosphorus removal agent is not sufficient, which leads to incomplete phosphorus removal reaction and needs to be further improved; the synergy between the units of the device is poor, the sludge conveying, reaction, and precipitation links are not smooth, which affects the overall treatment efficiency; there is no effective feedback adjustment mechanism, which cannot adjust the treatment parameters in real time according to the change of phosphorus content in the sewage, leading to waste of chemicals or substandard phosphorus removal.

[0005] Based on the above problems, it is urgent to develop a sewage chemical phosphorus removal device with reasonable structure, good synergy, high phosphorus removal efficiency and perfect feedback adjustment function, and the corresponding use method, to solve the problems existing in the prior art. SUMMARY

[0006] The purpose of the present application is to provide a sewage chemical phosphorus removal device and method thereof to solve the problems of insufficient mixing of sludge and chemicals, poor synergy between units and lack of feedback adjustment mechanism in the existing chemical phosphorus removal device as described in the background.

[0007] In order to achieve the above object, the present application provides the following technical scheme: sewage chemical phosphorus removal device, including aeration tank, first sedimentation tank, phosphorus removal tank, conveying pipe, stirring tank, second sedimentation tank and feedback regulation unit, the first sedimentation tank is communicated with aeration tank, the first sedimentation tank bottom is provided with feed chute, the feed chute is provided with first slot section, second slot section and discharge port, the discharge port is located on the second slot section on the end away from the first slot section. The phosphorus removal tank is connected at the top of the feed chute, and is located outside the first sedimentation tank, the inside of the phosphorus removal tank is separated into anaerobic bin and mixing bin, the anaerobic bin is located at the top of the first slot section, the mixing bin is located above the second slot section. The input end of the conveying pipe is connected with the hopper, and the hopper is located below the discharge port. The stirring tank is located below the output end of the conveying pipe. The second sedimentation tank is communicated with the stirring tank and the aeration tank. The feedback regulation unit is provided with a detection module, a control module and an execution module, the detection module is provided with a dissolved oxygen sensor, a first phosphorus content sensor, a second phosphorus content sensor and a reagent concentration sensor, the control module is electrically connected with the dissolved oxygen sensor, the first phosphorus content sensor, the second phosphorus content sensor and the reagent concentration sensor respectively, the execution module is electrically connected with the control module, and the execution module is used for controlling the aeration amount of the aeration tank, the conveying amount of the material, the reagent dosage of the mixing bin and the stirring speed. The first slot section penetrates the first sedimentation tank and the phosphorus removal tank, the first slot section is inserted with the first feed rod inside, and the first feed rod is used for conveying the sludge in the first sedimentation tank to the inside of the anaerobic bin of the phosphorus removal tank.

[0008] Preferably, the inside of the aeration tank is inserted with a communication pipe, an output pipe and an aeration pipe, the communication pipe and the output pipe are located on both sides of the aeration tank respectively, the second phosphorus content sensor is arranged in the inside of the communication pipe, the aeration pipe is located at the bottom of the aeration tank, the aeration pipe is connected with branch air pipes which are linearly and uniformly distributed, the branch air pipes are provided with uniformly distributed dense air holes on both sides, the aeration pipe is provided with an electromagnetic valve connected with the execution module, the electromagnetic valve is electrically connected with the execution module, and the dissolved oxygen sensor is arranged in the inside of the aeration tank.

[0009] Preferably, the inside of the first sedimentation tank is provided with a circuitous bend, one end of the circuitous bend is provided with an input port, the input port is sleeved outside the output pipe, the other end of the circuitous bend is connected with a drain pipe, the first phosphorus content sensor is arranged in the inside of the drain pipe, the bottom of the first sedimentation tank is provided with a first motor, the first motor is electrically connected with the execution module, the output end outside of the first motor is sleeved with a first transmission wheel, the outside of the first transmission wheel is sleeved with a first transmission belt, the inside of the first transmission belt is inserted with a first linkage wheel, the first linkage wheel is sleeved outside one end of the first feed rod, the other end outside of the first feed rod is fixedly connected with a spiral plate, and the spiral plate is located inside the first slot section.

[0010] Preferably, the second motor is fixedly connected to the outside of the phosphorus removal tank, the second motor is electrically connected with the execution module, the output end of the second motor penetrates into the inside of the anaerobic bin and is connected with a shaft rod, a stirring paddle is sleeved on the outside of the shaft rod, a flushing pipe is arranged on the outside of the phosphorus removal tank, a branch pipe is connected to the outside of the flushing pipe, and the branch pipe penetrates through the bottom of the phosphorus removal tank and is located below the stirring paddle.

[0011] Preferably, the third motor is further connected to the outside of the phosphorus removal tank, the third motor is electrically connected with the execution module, a second transmission wheel is sleeved on the output end of the third motor, a second transmission belt is sleeved on the outside of the second transmission wheel, and a second linkage wheel is inserted into the inside of the second transmission belt.

[0012] Preferably, a second material conveying rod is inserted into the inside of the phosphorus removal tank, the second material conveying rod is located in the inside of the mixing bin, a spiral plate is fixedly connected to one end of the second material conveying rod, the spiral plate on the second material conveying rod is located in the inside of the second groove segment, the other end of the second material conveying rod penetrates through the phosphorus removal tank to the outside and is inserted into the inside of the second linkage wheel, a transmission rod is further inserted into the inside of the phosphorus removal tank, the transmission rod is located in the inside of the mixing bin and is sleeved with a first stirring member on the outside, the other end of the transmission rod penetrates through the mixing bin to the inside of the anaerobic bin and is connected with the shaft rod, and the medicament concentration sensor is arranged in the inside of the mixing bin.

[0013] Preferably, a sludge pump is connected to the conveying pipe, and the sludge pump is electrically connected with the execution module.

[0014] Preferably, a stirring motor is arranged on the stirring tank, the stirring motor is electrically connected with the execution module, a stirring rod is connected to the output end of the stirring motor, a plurality of groups of second stirring members are uniformly distributed and sleeved on the outside of the stirring rod, a reflux pipe is inserted into the stirring tank, and the other end of the reflux pipe is inserted into the inside of the second sedimentation tank.

[0015] Preferably, a slow flow channel is arranged in the inside of the second sedimentation tank, a reflux port is arranged at one end of the slow flow channel, the reflux port is sleeved on the outside of the reflux pipe, a connecting port is arranged at the other end of the slow flow channel, the connecting port is sleeved on the outside of the communication pipe, a discharge groove is arranged at the bottom of the second sedimentation tank, a discharge motor is connected to the bottom of the second sedimentation tank, a discharge transmission wheel is sleeved on the output end of the discharge motor, a discharge transmission belt is sleeved on the outside of the discharge transmission wheel, a discharge linkage wheel is inserted into the inside of the discharge transmission belt, a discharge rod is inserted into the inside of the discharge linkage wheel, and a spiral plate is fixedly connected to one end of the discharge rod located in the discharge groove.

[0016] Preferably, the use method is realized based on real-time regulation of a feedback regulation system, and specifically includes the following steps:

[0017] S1: sewage pretreatment, the sewage to be treated containing phosphorus is introduced into the aeration tank, the aeration system is started, air is introduced into the aeration tank through the dense air holes of the aeration pipe and the branch air pipe; the feedback regulation system is started at the same time, the dissolved oxygen sensor collects the dissolved oxygen data in the aeration tank in real time and transmits them to the control module, after the control module compares the data with the preset threshold value, the aeration amount is controlled by adjusting the opening degree of the electromagnetic valve of the execution module, so that the dissolved oxygen content is maintained in the preset range, and the aeration time is 1-2h;

[0018] S2: primary sedimentation separation, after aeration, the sewage is introduced into the meandering bend of the first sedimentation tank through the output pipe, the sludge is gravity settled during the slow flow of the sewage, and the supernatant is discharged through the drain pipe; the first phosphorus content sensor detects the phosphorus content of the supernatant in real time and feeds back to the control module, if the phosphorus content is higher than the preset threshold value, the control module increases the aeration amount by adjusting the opening degree of the electromagnetic valve;

[0019] S3: anaerobic treatment of sludge, the control module starts the first motor through the feed adjustment unit, drives the first feed rod to rotate through the transmission mechanism, and transports the sludge at the bottom of the first sedimentation tank to the anaerobic bin; at the same time, the second motor is started through the stirring adjustment unit to drive the shaft rod and the stirring paddle to rotate and stir the sludge, and at the same time, clean water is introduced through the flushing pipe and the branch water pipe for flushing, the anaerobic treatment time is 0.5-1h, and the control module can optimize the rotating speed of the second motor through the stirring adjustment unit;

[0020] S4: sludge and reagent mixed reaction, the sludge-water mixture after anaerobic treatment is overflowed into the mixing bin through the gap on the partition plate between the anaerobic bin and the mixing bin; at the same time, the phosphorus removal reagent is added to the mixing bin through the reagent adding device, the reagent concentration sensor detects the reagent concentration in real time and feeds back to the control module, the control module adjusts the reagent adding amount to maintain the stable concentration; the transmission rod rotates with the shaft rod, drives the first stirring part to stir, so that the sludge and the reagent fully react, and the reaction time is 0.5-1h;

[0021] S5: secondary stirring intensification, after the mixed reaction, the sludge falls into the hopper through the discharge port, the control module starts the sludge pump through the feed adjustment unit, and the sludge is transported to the stirring tank through the conveying pipe; at the same time, the stirring motor is started through the stirring adjustment unit to drive the stirring rod and the second stirring part to stir again, the control module adjusts the rotating speed of the stirring motor to ensure uniform stirring, and the stirring time is 30-60min;

[0022] S6: secondary sedimentation separation, the stirred sludge-water mixture is introduced into the slow flow channel of the second sedimentation tank through the reflux pipe, the sludge slowly flows and settles in the discharge chute, and the supernatant is returned to the aeration tank through the communication pipe for repeated use; the second phosphorus content sensor detects the phosphorus content of the returned supernatant in real time and feeds back to the control module, if the phosphorus content is not up to standard, the control module adjusts the parameters such as the reagent adding amount and the stirring rate at the front end in reverse;

[0023] S7: Muddy discharge, start the discharge motor, drive the discharge rod to rotate through the transmission mechanism, discharge the sediment sludge in the discharge groove, and complete the phosphorus removal treatment.

[0024] Technical effects and advantages of the present application:

[0025] 1. The chemical phosphorus removal device and method for sewage, by setting the cooperative structure of the aeration tank, the first sedimentation tank, the phosphorus removal tank, the stirring tank and the second sedimentation tank, the integrated treatment process of sewage aeration pretreatment, primary sedimentation, sludge anaerobic treatment, medicament mixing reaction, secondary stirring intensification and secondary sedimentation separation is realized, each unit is smoothly connected, and the overall treatment efficiency is effectively improved; wherein the phosphorus removal tank is divided into an anaerobic bin and a mixing bin, the sludge is first subjected to anaerobic treatment to remove part of the organic matter, and then mixed with the phosphorus removal medicament, thereby improving the thoroughness of the phosphorus removal reaction and further improving the phosphorus removal efficiency.

[0026] 2. The chemical phosphorus removal device and method for sewage, by setting the first conveying rod, the second conveying rod and the corresponding transmission mechanism, the automatic conveying of the sludge between each treatment unit is realized, and the manual operation intensity is reduced; at the same time, the stirring paddle and the first stirring piece are arranged in the anaerobic bin and the mixing bin respectively, and the second stirring piece is arranged in the stirring tank, so that the sludge, the clean water and the phosphorus removal medicament are fully mixed through multi-stage stirring, and the phosphorus removal effect is further improved.

[0027] 3. The chemical phosphorus removal device and method for sewage, a plurality of sensors of the detection module collect key parameters in the sewage treatment process in real time, the control module compares and analyzes the detection data with the preset threshold value, and then the core parameters such as the aeration amount, the conveying speed, the medicament dosage and the stirring speed are accurately adjusted through the execution module, so that the intelligent and accurate adjustment of the treatment process is realized, the stability of the phosphorus removal effect is ensured, the medicament waste and energy loss are avoided, and the treatment cost is significantly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any inventive labor.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0030] Figure 2 It is a schematic diagram of the structure of the aeration tank of the present application;

[0031] Figure 3 It is a schematic diagram of the internal structure of the aeration tank of the present application;

[0032] Figure 4 Structure diagram of the aeration pipe of the present application;

[0033] Figure 5 Structure diagram of the left side of the first sedimentation tank and phosphorus removal tank of the present application;

[0034] Figure 6 Structure diagram of the right side of the first sedimentation tank and phosphorus removal tank of the present application;

[0035] Figure 7 Structure diagram of the internal structure of the first sedimentation tank and phosphorus removal tank of the present application;

[0036] Figure 8 Structure diagram of the conveying assembly and stirring tank of the present application;

[0037] Figure 9 Structure diagram of the second sedimentation tank of the present application;

[0038] Figure 10 Structure diagram of the internal structure of the second sedimentation tank of the present application.

[0039] In the figure: 1, aeration tank; 11, communication pipe; 12, output pipe; 13, aeration pipe; 131, branch air pipe; 132, air hole;

[0040] 2, first sedimentation tank; 21, meandering bend; 22, input port; 23, drain pipe; 24, first motor; 241, first transmission wheel; 242, first transmission belt; 243, first linkage wheel; 25, conveying chute; 251, first chute section; 252, second chute section; 253, discharge port; 26, first conveying rod;

[0041] 3, phosphorus removal tank; 31, anaerobic bin; 32, mixing bin; 33, second motor; 331, shaft rod; 332, stirring paddle; 34, flushing pipe; 341, branch water pipe; 35, third motor; 351, second transmission wheel; 352, second transmission belt; 353, second linkage wheel; 36, second conveying rod; 37, transmission rod; 371, first stirring member;

[0042] 4, conveying pipe; 41, sludge pump; 42, hopper;

[0043] 5, stirring tank; 51, stirring motor; 52, stirring rod; 53, second stirring member; 54, backflow pipe;

[0044] 6, second sedimentation tank; 61, slow flow channel; 62, backflow port; 63, connection port; 64, discharge chute; 65, discharge motor; 651, discharge transmission wheel; 652, discharge transmission belt; 653, discharge linkage wheel; 66, discharge rod. DETAILED DESCRIPTION

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] This invention discloses a wastewater chemical phosphorus removal device and method, according to the appendix. Figures 1-10 As shown, the system includes an aeration tank 1, a first sedimentation tank 2, a phosphorus removal tank 3, a conveying pipe 4, a mixing tank 5, a second sedimentation tank 6, and a feedback control unit. The first sedimentation tank 2 is connected to the aeration tank 1. A conveying trough 25 is provided at the bottom of the first sedimentation tank 2. The conveying trough 25 is provided with a first trough section 251, a second trough section 252, and a discharge port 253. The discharge port 253 is located at the end of the second trough section 252 away from the first trough section 251. The phosphorus removal tank 3 is connected to the top of the conveying trough 25 and is located outside the first sedimentation tank 2. The inner side of the phosphorus removal tank 3 is divided into an anaerobic chamber 31 and a mixing chamber 32. The anaerobic chamber 31 is located at the top of the first trough section 251, and the mixing chamber 32 is located above the second trough section 252. A hopper 42 is connected to the input end of the conveying pipe 4, and the hopper 42 is located below the discharge port 253. The mixing tank 5 is located below the output end of the conveying pipe 4. The second sedimentation tank 6 is connected to the mixing tank 5 and the aeration tank 1. The feedback adjustment unit includes a detection module, a control module, and an execution module. The detection module includes a dissolved oxygen sensor, a first phosphorus content sensor, a second phosphorus content sensor, and a reagent concentration sensor. The control module is electrically connected to the dissolved oxygen sensor, the first phosphorus content sensor, the second phosphorus content sensor, and the reagent concentration sensor. The execution module is electrically connected to the control module and is used to control the aeration rate of aeration tank 1, the material conveying rate, the reagent dosage of mixing chamber 32, and the stirring rate. The first trough section 251 runs through the first sedimentation tank 2 and the phosphorus removal tank 3. A first conveying rod 26 is inserted into the inner side of the first trough section 251. The first conveying rod 26 is used to transport the sludge in the first sedimentation tank 2 to the inner side of the anaerobic chamber 31 of the phosphorus removal tank 3.

[0047] According to the appendix Figures 2-4 As shown, further, a connecting pipe 11, an output pipe 12, and an aeration pipe 13 are inserted into the inner side of the aeration tank 1. The connecting pipe 11 and the output pipe 12 are located on both sides of the aeration tank 1, respectively. The second phosphorus content sensor is installed inside the connecting pipe 11. The aeration pipe 13 is located at the bottom of the aeration tank 1. A branch pipe 131 with a linear and uniform distribution is connected to the aeration pipe 13. The branch pipe 131 has densely distributed air holes 132 with a uniform distribution on both sides. A solenoid valve connected to the execution module is installed on the aeration pipe 13. The solenoid valve is electrically connected to the execution module. The dissolved oxygen sensor is installed inside the aeration tank 1.

[0048] According to the appendix Figures 5-7As shown, further, the first sedimentation tank 2 is provided with a detour bend 21 on the inside, the detour bend 21 is provided with an input port 22 at one end, the input port 22 is sleeved on the outside of the output pipe 12, the other end of the detour bend 21 is connected with a drain pipe 23, the first phosphorus content sensor is arranged in the drain pipe 23, the first sedimentation tank 2 is provided with a first motor 24 at the bottom, the first motor 24 is electrically connected with the execution module, the output end of the first motor 24 is sleeved with a first transmission wheel 241 on the outside, the first transmission wheel 241 is sleeved with a first transmission belt 242 on the outside, the first transmission belt 242 is inserted with a first linkage wheel 243 on the inside, the first linkage wheel 243 is sleeved on the outside of one end of the first material conveying rod 26, the other end of the first material conveying rod 26 is fixedly connected with a spiral plate on the outside, and the spiral plate is located on the inside of the first groove section 251.

[0049] According to the accompanying drawings Figures 5-7 As shown, further, the second motor 33 is fixedly connected on the outside of the phosphorus removal tank 3, the second motor 33 is electrically connected with the execution module, the output end of the second motor 33 penetrates the phosphorus removal tank 3 and is inserted into the inside of the anaerobic bin 31, and is connected with a shaft 331, the shaft 331 is sleeved with a stirring paddle 332 on the outside, the phosphorus removal tank 3 is provided with a flushing pipe 34 on the outside, the flushing pipe 34 is connected with a branch water pipe 341 on the outside, the branch water pipe 341 penetrates the bottom of the phosphorus removal tank 3 and is located below the stirring paddle 332.

[0050] According to the accompanying drawings Figure 7 As shown, in particular, the third motor 35 is further connected on the outside of the phosphorus removal tank 3, the third motor 35 is electrically connected with the execution module, the output end of the third motor 35 is sleeved with a second transmission wheel 351 on the outside, the second transmission wheel 351 is sleeved with a second transmission belt 352 on the outside, and the second transmission belt 352 is inserted with a second linkage wheel 353 on the inside.

[0051] According to the accompanying drawings Figure 7 As shown, in particular, the second material conveying rod 36 is inserted into the inside of the phosphorus removal tank 3, the second material conveying rod 36 is located in the mixing bin 32, a spiral plate is fixedly connected on the outside of one end of the second material conveying rod 36, the spiral plate on the second material conveying rod 36 is located on the inside of the second groove section 252, the other end of the second material conveying rod 36 penetrates the phosphorus removal tank 3 to the outside and is inserted into the inside of the second linkage wheel 353, a transmission rod 37 is further inserted into the inside of the phosphorus removal tank 3, the transmission rod 37 is located in the mixing bin 32 and is sleeved with a first stirring part 371 on the outside, the other end of the transmission rod 37 penetrates the mixing bin 32 to the inside of the anaerobic bin 31 and is connected with the shaft 331, and the medicament concentration sensor is arranged in the inside of the mixing bin 32.

[0052] According to the accompanying drawings Figure 8 As shown, in particular, the sludge pump 41 is connected on the conveying pipe 4, and the sludge pump 41 is electrically connected with the execution module.

[0053] According to the accompanying drawings Figure 8As shown, need to be particularly emphasized, the stirring pool 5 is provided with a stirring motor 51, the stirring motor 51 is electrically connected with the execution module, the output end of the stirring motor 51 is connected with a stirring rod 52, the outer side of the stirring rod 52 is sleeved with a plurality of groups of evenly distributed second stirring pieces 53, the stirring pool 5 is inserted with a reflux pipe 54, and the other end of the reflux pipe 54 is inserted into the inner side of the second sedimentation tank 6.

[0054] According to the accompanying drawings Figures 9-10 As shown, need to be particularly emphasized, the inner side of the second sedimentation tank 6 is provided with a slow flow channel 61, one end of the slow flow channel 61 is provided with a reflux port 62, the reflux port 62 is sleeved on the outer side of the reflux pipe 54, the other end of the slow flow channel 61 is provided with a connecting port 63, the connecting port 63 is sleeved on the outer side of the communication pipe 11, the bottom of the second sedimentation tank 6 is provided with a discharge chute 64, the bottom of the second sedimentation tank 6 is connected with a discharge motor 65, the output end of the discharge motor 65 is sleeved with a discharge transmission wheel 651 on the outer side, the discharge transmission wheel 651 is sleeved with a discharge transmission belt 652 on the outer side, the discharge transmission belt 652 is inserted with a discharge linkage wheel 653 on the inner side, the discharge linkage wheel 653 is inserted with a discharge rod 66 on the inner side, the discharge rod 66 is inserted into the inner side of the discharge chute 64, and one end of the discharge rod 66 located in the discharge chute 64 is fixedly connected with a spiral plate on the outer side.

[0055] According to the accompanying drawings Figures 1-10 As shown, need to be particularly emphasized, the use method is realized based on real-time regulation and control of the feedback regulation system, and specifically includes the following steps:

[0056] S1: sewage pretreatment, the sewage to be treated containing phosphorus is introduced into the aeration tank 1, the aeration system is started, air is introduced for aeration through the dense air holes 132 of the aeration pipe 13 and the branch air pipe 131; the feedback regulation system is started at the same time, the dissolved oxygen sensor collects the dissolved oxygen data in the aeration tank 1 in real time and transmits the data to the control module, the control module compares the data with the preset threshold value, and then controls the aeration amount by adjusting the opening degree of the electromagnetic valve of the execution module, so that the dissolved oxygen content is maintained in the preset range, and the aeration time is 1-2h;

[0057] S2: primary sedimentation separation, after aeration, the sewage enters the circuitous bend 21 of the first sedimentation tank 2 through the output pipe 12, and the sludge gravity settles in the slow flow process of the sewage, and the supernatant is discharged through the drain pipe 23; the first phosphorus content sensor detects the phosphorus content of the supernatant in real time and feeds back to the control module, if the phosphorus content is higher than the preset threshold value, the control module increases the aeration amount by adjusting the opening degree of the electromagnetic valve.

[0058] S3: anaerobic treatment of sludge, the control module starts the first motor 24 through the feed adjustment unit, drives the first feed rod 26 to rotate through the transmission mechanism, transports the sludge at the bottom of the first sedimentation tank 2 to the anaerobic bin 31; at the same time, the second motor 33 is started through the stirring adjustment unit, drives the shaft rod 331 and the stirring paddle 332 to rotate and stir the sludge, and at the same time, clean water is introduced through the flushing pipe 34 and the branch water pipe 341, the anaerobic treatment time is 0.5-1h, and the control module can optimize the rotating speed of the second motor 33 through the stirring adjustment unit;

[0059] S4: sludge and reagent mixing reaction, the sludge-water mixture after anaerobic treatment flows into the mixing bin 32 through the gap above the partition plate between the anaerobic bin 31 and the mixing bin 32; at the same time, the phosphorus removal reagent is added to the mixing bin 32 through the reagent adding device, the reagent concentration sensor detects the reagent concentration in real time and feeds back to the control module, the control module adjusts the reagent adding amount to maintain the stable concentration; the transmission rod 37 rotates with the shaft rod 331, drives the first stirring part 371 to stir and make the sludge and the reagent fully react, and the reaction time is 0.5-1h;

[0060] S5: secondary stirring intensification, the sludge after mixing reaction falls into the hopper 42 through the discharge port 253, the control module starts the sludge pump 41 through the feed adjustment unit, and the sludge is transported to the stirring tank 5 through the conveying pipe 4; at the same time, the stirring motor 51 is started through the stirring adjustment unit, drives the stirring rod 52 and the second stirring part 53 to stir twice, and the control module adjusts the rotating speed of the stirring motor 51 to ensure uniform stirring, and the stirring time is 30-60min;

[0061] S6: secondary sedimentation and separation, the stirred sludge-water mixture enters the slow flow channel 61 of the second sedimentation tank 6 through the reflux pipe 54, the sludge slowly flows and settles in the discharge chute 64, and the supernatant is returned to the aeration tank 1 through the communication pipe 11 for repeated use; the second phosphorus content sensor detects the phosphorus content of the returned supernatant in real time and feeds back to the control module, if the phosphorus content is not up to standard, the control module adjusts the parameters such as reagent adding amount and stirring speed at the front end in retrospect;

[0062] S7: sludge discharge, the discharge motor 65 is started, the discharge rod 66 is driven to rotate through the transmission mechanism, the sludge in the discharge chute 64 is discharged from the device, and the phosphorus removal treatment is completed.

[0063] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other present or future devices perform the same function under a different name. It must be noted that, as used in the specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a plurality of such components. In this specification and in the claims, the term "when" should be understood to mean "whereupon" or "upon" when used in contexts describing actions of one device upon the performance of another, whether the actions occur contemporaneously or at different times. The terms "comprise" (and any grammatical variations thereof, such as "comprising," "comprises," and "comprised of") "include" (and any grammatical variations thereof, such as "includes," "including" and "includes") "have" (and any grammatical variations thereof, such as "has" and "having") "contain" (and any grammatical variations thereof, such as "contains" and "containing") "encompass" "comprehend" "substantially," "approximately," and "about" are used herein to enable an appreciation of certain aspects of the present application and to convey the substantial nature of the present application. Thus, these terms are used to describe the disclosed embodiments and the scope of the present application, and are not meant to be limiting. The terms "comprise," "comprising," "include," "including," "have," "having," "contain," "containing," "encompass," "comprehend," "substantially," "approximately," and "about" are used in the sense of "including, but not limited to."

[0064] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations are intended to be included within the scope of the present application as defined in the following claims, along with full authority to claim such combinations of the subject matter recited in any claim or reference described herein as in the following claims.

Claims

1. A wastewater chemical phosphorus removal device, characterized in that, include: Aeration tank (1); The first sedimentation tank (2) is connected to the aeration tank (1). The bottom of the first sedimentation tank (2) is provided with a conveying trough (25). The conveying trough (25) is provided with a first trough section (251), a second trough section (252) and a discharge port (253). The discharge port (253) is located at the end of the second trough section (252) away from the first trough section (251). The phosphorus removal tank (3) is connected to the top of the conveying trough (25) and is located outside the first sedimentation tank (2). The phosphorus removal tank (3) is divided into an anaerobic chamber (31) and a mixing chamber (32) on the inner side. The anaerobic chamber (31) is located at the top of the first trough section (251), and the mixing chamber (32) is located above the second trough section (252). A conveying pipe (4) is connected to a hopper (42) at its input end, and the hopper (42) is located below the discharge port (253); A mixing tank (5) is located below the output end of the conveying pipe (4); The second sedimentation tank (6) is connected to the stirring tank (5) and the aeration tank (1); The feedback adjustment unit is provided with a detection module, a control module and an execution module. The detection module is provided with a dissolved oxygen sensor, a first phosphorus content sensor, a second phosphorus content sensor and a reagent concentration sensor. The control module is electrically connected to the dissolved oxygen sensor, the first phosphorus content sensor, the second phosphorus content sensor and the reagent concentration sensor respectively. The execution module is electrically connected to the control module. The execution module is used to control the aeration rate of the aeration tank (1), the material conveying rate, the reagent dosage of the mixing chamber (32) and the stirring rate. The first trough section (251) runs through the first sedimentation tank (2) and the phosphorus removal tank (3). A first conveying rod (26) is inserted into the inner side of the first trough section (251). The first conveying rod (26) is used to transport the sludge in the first sedimentation tank (2) to the inner side of the anaerobic chamber (31) of the phosphorus removal tank (3).

2. The wastewater chemical phosphorus removal device according to claim 1, characterized in that, The aeration tank (1) is connected to a connecting pipe (11), an output pipe (12) and an aeration pipe (13). The connecting pipe (11) and the output pipe (12) are located on both sides of the aeration tank (1). The second phosphorus content sensor is located inside the connecting pipe (11). The aeration pipe (13) is located at the bottom of the aeration tank (1). The aeration pipe (13) is connected to a branch pipe (131) that is linearly and evenly distributed. The branch pipe (131) has densely distributed air holes (132) on both sides. The aeration pipe (13) is equipped with a solenoid valve connected to the execution module. The solenoid valve is electrically connected to the execution module. The dissolved oxygen sensor is located inside the aeration tank (1).

3. The wastewater chemical phosphorus removal device according to claim 1, characterized in that, The first sedimentation tank (2) has a meandering bend (21) on its inner side. One end of the meandering bend (21) has an inlet (22) which is sleeved on the outside of the output pipe (12). The other end of the meandering bend (21) is connected to a drain pipe (23). The first phosphorus content sensor is installed inside the drain pipe (23). The bottom of the first sedimentation tank (2) has a first motor (24) which is electrically connected to the execution module. The output end of the first motor (24) is sleeved on the outside of a first transmission wheel (241). The first transmission wheel (241) is sleeved on the outside of a first transmission belt (242). The first transmission belt (242) is inserted into the inside of a first linkage wheel (243). The first linkage wheel (243) is sleeved on the outside of one end of a first conveying rod (26). The other end of the first conveying rod (26) is fixedly connected to a spiral plate, which is located inside the first trough section (251).

4. The wastewater chemical phosphorus removal device according to claim 1, characterized in that, A second motor (33) is fixedly connected to the outside of the phosphorus removal tank (3). The second motor (33) is electrically connected to the execution module. The output end of the second motor (33) passes through the phosphorus removal tank (3) and is inserted into the inside of the anaerobic chamber (31), and is connected to a shaft (331). An agitator (332) is sleeved on the outside of the shaft (331). A flushing pipe (34) is provided on the outside of the phosphorus removal tank (3). A branch water pipe (341) is connected to the outside of the flushing pipe (34). The branch water pipe (341) passes through the bottom of the phosphorus removal tank (3) and is located below the agitator (332).

5. The wastewater chemical phosphorus removal device according to claim 1, characterized in that, A third motor (35) is also connected to the outside of the phosphorus removal tank (3). The third motor (35) is electrically connected to the execution module. A second transmission wheel (351) is sleeved on the outside of the output end of the third motor (35). A second transmission belt (352) is sleeved on the outside of the second transmission wheel (351). A second linkage wheel (353) is inserted into the inside of the second transmission belt (352).

6. The wastewater chemical phosphorus removal device according to claim 1, characterized in that, A second conveying rod (36) is inserted into the inside of the phosphorus removal tank (3). The second conveying rod (36) is located inside the mixing chamber (32). A spiral plate is fixedly connected to the outside of one end of the second conveying rod (36). The spiral plate on the second conveying rod (36) is located inside the second trough section (252). The other end of the second conveying rod (36) passes through the phosphorus removal tank (3) to the outside and is inserted into the inside of the second linkage wheel (353). A transmission rod (37) is also inserted into the inside of the phosphorus removal tank (3). The transmission rod (37) is located inside the mixing chamber (32) and is sleeved with a first stirring element (371) on the outside. The other end of the transmission rod (37) passes through the mixing chamber (32) to the inside of the anaerobic chamber (31) and is connected to the shaft (331). The reagent concentration sensor is set inside the mixing chamber (32).

7. The wastewater chemical phosphorus removal device according to claim 1, characterized in that, A sludge pump (41) is connected to the conveying pipe (4), and the sludge pump (41) is electrically connected to the actuator.

8. The wastewater chemical phosphorus removal device according to claim 1, characterized in that, The stirring tank (5) is equipped with a stirring motor (51), which is electrically connected to the execution module. The output end of the stirring motor (51) is connected to a stirring rod (52). Multiple sets of evenly distributed second stirring elements (53) are sleeved on the outside of the stirring rod (52). A return pipe (54) is inserted into the stirring tank (5), and the other end of the return pipe (54) is inserted into the inside of the second sedimentation tank (6).

9. The wastewater chemical phosphorus removal device according to claim 1, characterized in that, The second sedimentation tank (6) has a slow-flow channel (61) on its inner side. One end of the slow-flow channel (61) has a return port (62), which is sleeved on the outside of the return pipe (54). The other end of the slow-flow channel (61) has a connection port (63), which is sleeved on the outside of the connecting pipe (11). The bottom of the second sedimentation tank (6) has a discharge trough (64), and the bottom of the second sedimentation tank (6) is connected to a discharge motor (65). A discharge drive wheel (651) is sleeved on the outer side of the output end of the motor (65). A discharge drive belt (652) is sleeved on the outer side of the discharge drive wheel (651). A discharge linkage wheel (653) is inserted into the inner side of the discharge drive belt (652). A discharge rod (66) is inserted into the inner side of the discharge linkage wheel (653). The discharge rod (66) is inserted into the inner side of the discharge trough (64). A spiral plate is fixedly connected to the outer side of one end of the discharge rod (66) located in the discharge trough (64).

10. The method of using the wastewater chemical phosphorus removal device according to any one of claims 1-9, characterized in that, The method of use is based on real-time control of a feedback regulation system, and specifically includes the following steps: S1: Wastewater pretreatment, introduce the phosphorus-containing wastewater to be treated into the aeration tank (1), start the aeration system, and introduce air aeration through the dense ventilation holes (132) of the aeration pipe (13) and branch pipe (131); simultaneously start the feedback regulation system, the dissolved oxygen sensor collects dissolved oxygen data in the aeration tank (1) in real time and transmits it to the control module, the control module compares the data with the preset threshold, and controls the aeration volume by adjusting the opening of the solenoid valve of the execution module to maintain the dissolved oxygen content within the preset range, and the aeration time is 1-2 hours; S2: Initial sedimentation and separation. After aeration, the wastewater enters the meandering bend (21) of the first sedimentation tank (2) through the output pipe (12). During the slow flow of wastewater, the sludge settles due to gravity, and the supernatant is discharged through the drain pipe (23). The first phosphorus content sensor detects the phosphorus content of the supernatant in real time and feeds it back to the control module. If the phosphorus content is higher than the preset threshold, the control module increases the aeration rate by adjusting the opening of the solenoid valve. S3: Anaerobic treatment of sludge. The control module starts the first motor (24) through the material conveying adjustment unit, which drives the first material conveying rod (26) to rotate through the transmission mechanism, and conveys the sludge at the bottom of the first sedimentation tank (2) to the anaerobic chamber (31); at the same time, the second motor (33) is started through the stirring adjustment unit, which drives the shaft (331) and stirring paddle (332) to rotate and stir the sludge. Simultaneously, clean water is introduced through the flushing pipe (34) and branch water pipe (341) for rinsing. The anaerobic treatment time is 0.5-1h. The control module can optimize the speed of the second motor (33) through the stirring adjustment unit. S4: The sludge and the reagent are mixed and reacted. The sludge-water mixture after anaerobic treatment overflows into the mixing chamber (32) through the gap above the partition between the anaerobic chamber (31) and the mixing chamber (32). At the same time, the phosphorus removal agent is added to the mixing chamber (32) through the reagent dosing device. The reagent concentration sensor detects the reagent concentration in real time and feeds it back to the control module. The control module adjusts the reagent dosing amount to maintain a stable concentration. The transmission rod (37) rotates with the shaft (331) to drive the first stirring piece (371) to stir so that the sludge and the reagent react fully. The reaction time is 0.5-1h. S5: Secondary stirring enhancement. After the mixing reaction, the sludge falls into the hopper (42) through the discharge port (253). The control module starts the sludge pump (41) through the material conveying adjustment unit and conveys the sludge to the mixing tank (5) through the conveying pipe (4). At the same time, the stirring motor (51) is started through the stirring adjustment unit, which drives the stirring rod (52) and the second stirring piece (53) to stir for the second time. The control module adjusts the speed of the stirring motor (51) to ensure uniform stirring. The stirring time is 30-60 minutes. S6: Secondary sedimentation and separation. The stirred mud-water mixture enters the slow flow channel (61) of the second sedimentation tank (6) through the return pipe (54). The sludge slowly flows and settles into the discharge trough (64). The supernatant is returned to the aeration tank (1) through the connecting pipe (11) for reuse. The second phosphorus content sensor detects the phosphorus content of the returned supernatant in real time and feeds it back to the control module. If the phosphorus content does not meet the standard, the control module retrospectively adjusts the front-end reagent dosage, stirring rate and other parameters. S7: Sludge discharge. Start the discharge motor (65), which drives the discharge rod (66) to rotate through the transmission mechanism, and discharge the sludge in the discharge trough (64) to complete the phosphorus removal treatment.

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