Device and method for intelligently controlling air floatation, dosing and phosphorus removal

Abstract

The invention discloses a device and a method for intelligently controlling air flotation, dosing and phosphorus removal, and relates to the technical field of sewage treatment. The device comprises a base, the top of the base is fixedly connected with an air floatation tank, the front face of the air floatation tank is fixedly connected with a central control PLC system, the back face of the air floatation tank is provided with a dosing system, the top of one side of the air floatation tank is fixedly connected with a water inlet tank, and the bottom of the other side of the air floatation tank is fixedly connected with a water outlet tank. A drainage pipe is fixedly connected to the bottom of one side of the water outlet tank, rotating mechanisms are arranged in the water inlet tank and the water outlet tank, and an L-shaped support is jointly and fixedly connected between the bottom of the water inlet tank and the top of the base. According to the device and the method for intelligently controlling air-flotation dosing and dephosphorization, intelligent control of air-flotation dephosphorization is achieved, real-time accurate dosing of chemicals can be achieved, manpower input in the operation process is greatly reduced, and the usage amount of the chemicals is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a device and method for intelligently controlling air flotation and dosing for phosphorus removal. Background Art

[0002] With the improvement of people's living standards and the development of the country, a large amount of waste sewage is generated in daily life and industrial production. The waste sewage contains a large amount of impurities and grease and other substances. Some industrial waste sewage raw water is even acidic and corrosive. Direct discharge will cause huge pollution to the ecological environment. Therefore, it needs to be purified before discharge. Sewage phosphorus removal refers to the removal of phosphorus in sewage. Phosphorus has the property of mutual circulation and transformation between solid and dissolved forms in sewage. Sewage phosphorus removal is developed based on this property of phosphorus. Sewage phosphorus removal technology is to add a certain amount of reagents to sewage to make phosphorus become insoluble solid precipitates and separate it from sewage. Chemical phosphorus removal, sewage treatment standard B standard, can no longer meet the country's new effluent water quality standards for sewage treatment plants, and thus the control requirements for the total phosphorus index of effluent water quality are further improved. Therefore, an intelligent control flotation dosing phosphorus removal device and method are needed.

[0003] The existing intelligent control of air flotation and dosing phosphorus removal device and method do not monitor the total phosphorus data of the inlet and outlet in the flotation tank in real time, making it difficult to judge the phosphorus removal effect of the sewage. By manually adding reagents to the flotation tank, since the manual addition of reagents often results in excessive addition, the phosphorus removal of sewage in the flotation tank does not meet the standard, and thus cannot achieve real-time accurate dosing of reagents and greatly wastes the amount of reagents used. Therefore, an intelligent control of air flotation and dosing phosphorus removal device and method are proposed to solve the above problems. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a device and method for intelligently controlling flotation-dosing phosphorus removal, which solves the problem that there is no real-time monitoring of the total phosphorus data of the influent and the effluent in the flotation tank, making it difficult to judge the phosphorus removal effect of the sewage. By manually adding chemicals to the flotation tank, since the artificial addition of chemicals is often excessive, the phosphorus removal of the sewage in the flotation tank does not meet the standard, and thus the real-time accurate addition of chemicals cannot be achieved and the amount of chemicals used is greatly wasted.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an intelligently controlled flotation and dosing phosphorus removal device, comprising a base, the top of the base is fixedly connected to a flotation tank, the front of the flotation tank is fixedly connected to a central control PLC system, the back of the flotation tank is provided with a dosing system, the top of one side of the flotation tank is fixedly connected to a water inlet tank, the bottom of the other side of the flotation tank is fixedly connected to a water outlet tank, the bottom of one side of the water outlet tank is fixedly connected to a drain pipe, the interiors of the water inlet tank and the water outlet tank are both provided with a rotating mechanism, an L-shaped bracket is fixedly connected between the bottom of the water inlet tank and the top of the base, an inlet total phosphorus monitoring device is fixedly connected between the top of the L-shaped bracket and the bottom of the water inlet tank, the top of the base is fixedly connected to the outlet total phosphorus monitoring device, and the outlet total phosphorus monitoring device is fixedly connected to the top of the base. The phosphorus monitoring device is fixedly connected to the back of the outlet tank. When phosphorus-containing sewage enters the water tank, the total phosphorus data in the sewage at this time is monitored by the inlet total phosphorus monitoring device. The data monitored by the inlet total phosphorus monitoring device is transmitted to the central control PLC system. After that, the sewage enters the flotation tank. The dosing system adds medicine to the flotation tank. The sewage after phosphorus removal enters the outlet tank. The total phosphorus data of the sewage in the outlet tank is monitored by the outlet total phosphorus monitoring device. The outlet total phosphorus monitoring device transmits the monitoring data to the central control PLC system. The central control PLC system further adjusts the dosage of the agent in the flotation tank according to the difference between the total phosphorus data of the inlet water of the flotation tank and the total phosphorus data of the outlet water, and combines the outlet total phosphorus control index. The central control PLC system realizes unmanned flotation tank and accurate dosing of agents through the above-mentioned automatic adjustment function.

[0006] Preferably, the rotating mechanism includes a fixed rod, which is fixedly connected to the inner wall of the water inlet tank and the inner wall of the water outlet tank. The surface of the fixed rod is rotatably connected to a ring plate, and the number of the ring plates is set to be multiple. The surface of the ring plate is fixedly connected to a rotating blade, and the surface of the rotating blade is provided with air holes. The rotating mechanism can make the phosphorus-containing molecules in the sewage more uniform, thereby making the data of the inlet total phosphorus monitoring equipment and the outlet total phosphorus monitoring equipment more accurate, thereby facilitating the accurate dosing of the dosing system and improving the precision of the device.

[0007] Preferably, the dosing system includes a medicine box, which is fixedly connected to the back of the flotation tank, a dosing mechanism is arranged on the top of the medicine box, a medicine adding mechanism is arranged on one side of the top of the medicine box, and a stirring mechanism is arranged on both sides of the inside of the medicine box. Before the dosing system works, the medicine is first added to the medicine box by using the medicine adding mechanism in the dosing system, and then the medicine in the medicine box is continuously stirred by the stirring mechanism. After stirring, the medicine is more uniform and the efficacy is more stable. Then, the medicine is quantitatively added to the flotation tank through the dosing mechanism.

[0008] Preferably, the dosing mechanism includes a metering cylinder, which is fixedly connected to the top of the medicine box, and an extraction tube is connected to the bottom tube of one side of the metering cylinder, one end of the extraction tube passes through the top wall of the medicine box and extends to the interior of the medicine box, and an electromagnetic metering diaphragm pump is fixedly connected to the surface of the extraction tube, and the electromagnetic metering diaphragm pump is fixedly connected to the top of the medicine box, and a connecting tube is connected to the bottom tube of the other side of the metering cylinder.

[0009] Preferably, the input end of the connecting pipe is fixedly connected with a one-way electromagnetic valve, the surface of the connecting pipe is fixedly connected with a booster pump, the booster pump is fixedly connected to the back of the flotation tank, the output end of the connecting pipe extends to the inside of the flotation tank and is connected with a square tube, the bottom of the square tube is connected with a nozzle, the inside of the metering cylinder is fixedly connected with a liquid level sensor, when the medicine is added to the flotation tank by the dosing mechanism, the electromagnetic metering diaphragm pump is controlled to work by the central control PLC system, and the electromagnetic metering diaphragm pump draws the medicine in the medicine box to the inside of the metering cylinder through the extraction tube, The data of the electromagnetic metering diaphragm pump is transmitted to the central control PLC system until the required amount is pumped. The central control PLC system controls the electromagnetic metering diaphragm pump to stop working, and the central control PLC system controls the solenoid valve to open and the booster pump to work. The medicine in the metering cylinder enters the square tube through the connecting pipe, and is finally sprayed into the flotation tank through the nozzle. The liquid level sensor with model MY-136 monitors the liquid level of the medicine in the metering cylinder, and transmits the monitoring data to the central control PLC system until the medicine in the metering cylinder is used up, thereby realizing the quantitative dosing of the flotation tank.

[0010] Preferably, the medicine adding mechanism includes a medicine adding tube, which is fixedly connected to the top of the medicine box, the top of the medicine adding tube is rotatably connected to a cover plate, the bottom of the cover plate is fixedly connected to a first magnet, and the top of the medicine adding tube is fixedly connected to a second magnet, and the first magnet and the second magnet have opposite magnetic properties.

[0011] Preferably, a filter is placed inside the medicine adding tube, and plug blocks are fixedly connected to both sides of the filter. Slots are provided on both sides of the top of the medicine adding tube, and the plug blocks are plugged into the inside of the slots. When adding medicines to the medicine box through the medicine adding mechanism, the cover is opened, and medicines are added to the medicine box through the medicine adding tube. The setting of the filter can filter the medicines to be added to the medicine box to prevent impurities such as stones from entering the medicine box, and the setting of the plug blocks and the slots can remove the filter, clean it and install it. After adding medicines, the cover is closed. Due to the mutual attraction between the first magnet and the second magnet, the cover is firmly fixed on the medicine adding tube.

[0012] Preferably, the stirring mechanism includes a motor, which is fixedly connected to the top of the medicine box, and the output end of the motor passes through the top wall of the medicine box and is fixedly connected to a rotating shaft, and stirring blades are fixedly connected to both sides of the rotating shaft, so that the concentration of the medicine is more uniform and stable during use, avoiding the occurrence of uneven drug addition in the later stage and improving the stability of the drug efficacy during drug addition.

[0013] A method for intelligently controlling air flotation and dosing for phosphorus removal comprises the following steps: S1: The total phosphorus data in the water inlet tank is monitored by the inlet total phosphorus monitoring device, and the data monitored by the inlet total phosphorus monitoring device is transmitted to the central control PLC system, and the central control PLC system controls the dosing system to adjust the dosage of the agent according to the value; S2: The effluent total phosphorus monitoring device monitors the total phosphorus data in the effluent tank, and the effluent total phosphorus monitoring device transmits the monitored data to the central control PLC system; S3: The central control PLC system further adjusts the dosage of the reagent in the flotation tank according to the difference between the total phosphorus data of the influent and the effluent of the flotation tank and the effluent total phosphorus control index; S4: The central control PLC system realizes unmanned operation of the flotation tank and accurate dosing of the reagents through the above-mentioned automatic adjustment function.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The method for intelligently controlling flotation-dosing phosphorus removal of the present invention can monitor the total phosphorus data in the water inlet tank and the water outlet tank respectively through the water inlet total phosphorus monitoring equipment and the water outlet total phosphorus monitoring equipment, monitor the difference between the total phosphorus of the water quality of the water outlet and the discharge standard, so as to judge the increase or decrease of the dosage of the dosing in the flotation tank, and use the central control computer PLC system through the above correction method to realize intelligent control of flotation phosphorus removal, which can realize real-time accurate dosage of the agent, greatly reduce the manpower input during the operation process, and greatly save the amount of agent used.

[0015] The intelligently controlled air flotation dosing and phosphorus removal device of the present invention can filter the medicines to be added into the medicine box through the setting of the medicine adding mechanism, prevent impurities such as stones from entering the medicine box, and ensure the purity of the medicines. The filter can be taken out, cleaned and installed through the setting of the plug block and the slot, and the filtering effect of the filter is ensured. After the addition of the medicines is completed, the cover plate is firmly fixed on the medicine adding pipe through the mutual attraction of the first magnet and the second magnet, and it is more convenient to open and close the cover plate.

[0016] Through the setting of the stirring mechanism, the central control PLC system controls the motor to work, the motor drives the rotating shaft to rotate, and the rotating shaft drives the stirring blades to rotate and stir continuously, so that the medicines in the medicine box can be stirred evenly, making the concentration of the medicines more uniform and stable when used, avoiding the occurrence of uneven dosing in the later stage, and improving the stability of the efficacy when dosing. Through the setting of the rotating mechanism, due to the effect of the water flow, the ring plate rotates on the surface of the fixed rod, and the rotating ring plate drives the rotating blades to rotate, so that the rotating rotating blades can stir the water. The stirred water can make the phosphorus molecules in the sewage more uniform, so that the data of the inlet total phosphorus monitoring equipment and the outlet total phosphorus monitoring equipment during monitoring are more accurate, which is convenient for the accurate dosing of the dosing system and improves the precision of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the rotating mechanism of the present invention; Figure 3 This is a schematic diagram of the structure of the dosing system of the present invention; Figure 4 This is a schematic diagram of the structure of the dosing mechanism of the present invention; Figure 5 This is a schematic diagram of the internal structure of the metering cylinder of the present invention; Figure 6 This is a schematic diagram of the structure of the medicine adding mechanism of the present invention; Figure 7 This is a schematic diagram of the stirring mechanism structure of the present invention; Figure 8 It is a flowchart of the overall process of the present invention.

[0018] In the figure: 1, base; 2, air flotation tank; 3, central control PLC system; 4, dosing system; 41, medicine box; 42, dosing mechanism; 421, metering cylinder; 422, extraction pipe; 423, electromagnetic metering diaphragm pump; 424, connecting pipe; 425, one-way electromagnetic valve; 426, booster pump; 427, square pipe; 428, nozzle; 429, liquid level sensor; 43, dosing mechanism; 431, dosing pipe; 432, cover plate; 433 , first magnet; 434, second magnet; 435, filter; 436, plug; 437, slot; 44, stirring mechanism; 441, motor; 442, rotating shaft; 443, stirring blade; 5, water inlet tank; 6, water outlet tank; 7, drain pipe; 8, rotating mechanism; 81, fixing rod; 82, ring plate; 83, rotating blade; 84, air hole; 9, L-shaped bracket; 10, inlet total phosphorus monitoring equipment; 11, outlet total phosphorus monitoring equipment. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-8 The present invention provides a technical solution: an intelligently controlled flotation dosing and phosphorus removal device, comprising a base 1, a flotation tank 2 is fixedly connected to the top of the base 1, a central control PLC system 3 is fixedly connected to the front of the flotation tank 2, a dosing system 4 is arranged on the back of the flotation tank 2, a water inlet tank 5 is fixedly connected to the top of one side of the flotation tank 2, a water outlet tank 6 is fixedly connected to the bottom of the other side of the flotation tank 2, a drain pipe 7 is fixedly connected to the bottom of one side of the water outlet tank 6, a rotating mechanism 8 is arranged inside the water inlet tank 5 and the water outlet tank 6, an L-shaped bracket 9 is fixedly connected between the bottom of the water inlet tank 5 and the top of the base 1, an inlet total phosphorus monitoring device 10 is fixedly connected between the top of the L-shaped bracket 9 and the bottom of the water inlet tank 5, an outlet total phosphorus monitoring device 11 is fixedly connected to the top of the base 1, and the outlet total phosphorus monitoring device 11 is fixedly connected to the outlet tank 6, when the phosphorus-containing sewage enters the water inlet tank 5, the total phosphorus data in the sewage at this time is monitored by the inlet total phosphorus monitoring device 10, and the data monitored by the inlet total phosphorus monitoring device 10 is transmitted to the central control PLC system 3, and then the sewage enters the flotation tank 2, and the medicine is added to the flotation tank 2 through the dosing system 4. The sewage after phosphorus removal enters the outlet tank 6, and the total phosphorus data of the sewage in the outlet tank 6 is monitored by the outlet total phosphorus monitoring device 11, and the outlet total phosphorus monitoring device 11 transmits the monitored data to the central control PLC system 3. The central control PLC system 3 further adjusts the dosage of the agent in the flotation tank 2 according to the difference between the total phosphorus data of the inlet water of the flotation tank 2 and the total phosphorus data of the outlet water, and combines the outlet total phosphorus control index. The central control PLC system 3 realizes the unattended and accurate dosing of the agent in the flotation tank 2 through the above-mentioned automatic adjustment function.

[0021] The rotating mechanism 8 includes a fixed rod 81, which is fixedly connected to the inner wall of the water inlet box 5 and the inner wall of the water outlet box 6. The surface of the fixed rod 81 is rotatably connected to a ring plate 82, and the number of the ring plates 82 is set to be multiple. The surface of the ring plate 82 is fixedly connected to a rotating blade 83, and the surface of the rotating blade 83 is provided with an air hole 84. The rotating mechanism 8 can roll and stir the water in the water inlet box 5 and the water outlet box 6. Through the action of the water flow in the water inlet box 5 and the water outlet box 6, the ring plate 82 rotates on the surface of the fixed rod 81, and the rotating ring plate 82 drives the rotating blade 83 to rotate, so that the rotating rotating blade 83 can stir the water, and the stirred water can make the phosphorus molecules in the sewage more uniform.

[0022] The dosing system 4 includes a medicine box 41, which is fixedly connected to the back of the flotation tank 2. A dosing mechanism 42 is arranged on the top of the medicine box 41, a dosing mechanism 43 is arranged on one side of the top of the medicine box 41, and stirring mechanisms 44 are arranged on both sides of the inside of the medicine box 41. Before the dosing system 4 works, the dosing mechanism 43 in the dosing system 4 is first used to add medicines to the medicine box 41, and then the stirring mechanism 44 is used to continuously stir the medicines in the medicine box 41. After stirring, the medicines are more uniform and the efficacy is more stable. Then, the dosing mechanism 42 is used to quantitatively add medicines to the flotation tank 2.

[0023] The dosing mechanism 42 includes a metering cylinder 421, which is fixedly connected to the top of the medicine box 41. An extraction tube 422 is connected to the bottom tube on one side of the metering cylinder 421. One end of the extraction tube 422 passes through the top wall of the medicine box 41 and extends to the interior of the medicine box 41. An electromagnetic metering diaphragm pump 423 is fixedly connected to the surface of the extraction tube 422. The electromagnetic metering diaphragm pump 423 is fixedly connected to the top of the medicine box 41. A connecting tube 424 is connected to the bottom tube on the other side of the metering cylinder 421.

[0024] The input end of the connecting pipe 424 is fixedly connected with a one-way electromagnetic valve 425, the surface of the connecting pipe 424 is fixedly connected with a booster pump 426, the booster pump 426 is fixedly connected to the back of the flotation tank 2, the output end of the connecting pipe 424 extends to the inside of the flotation tank 2 and is connected with a square pipe 427, the bottom of the square pipe 427 is connected with a nozzle 428, the inside of the quantitative cylinder 421 is fixedly connected with a liquid level sensor 429, the electromagnetic metering diaphragm pump 423 is controlled by the central control PLC system 3 to work, the electromagnetic metering diaphragm pump 423 draws the medicine in the medicine box 41 to the inside of the quantitative cylinder 421 through the extraction pipe 422, and the electromagnetic metering diaphragm pump 42 3 is transmitted to the central control PLC system 3 until the required amount is pumped, the central control PLC system 3 controls the electromagnetic metering diaphragm pump 423 to stop working, and the central control PLC system 3 controls the solenoid valve to open and the booster pump 426 to work, the medicine in the quantitative cylinder 421 enters the square tube 427 through the connecting pipe 424, and is finally sprayed into the flotation tank 2 through the nozzle 428, the liquid level of the medicine in the quantitative cylinder 421 is monitored by the liquid level sensor 429 with model MY-136, and the monitoring data is transmitted to the central control PLC system 3 until the medicine in the quantitative cylinder 421 is used up, thereby realizing the quantitative dosing of the flotation tank 2.

[0025] The medicine adding mechanism 43 includes a medicine adding tube 431, which is fixedly connected to the top of the medicine box 41. The top of the medicine adding tube 431 is rotatably connected to a cover plate 432, the bottom of the cover plate 432 is fixedly connected to a first magnet 433, and the top of the medicine adding tube 431 is fixedly connected to a second magnet 434. The first magnet 433 and the second magnet 434 have opposite magnetic properties.

[0026] A filter screen 435 is placed inside the medicine adding tube 431, and plug blocks 436 are fixedly connected to both sides of the filter screen 435. Slots 437 are provided on both sides of the top of the medicine adding tube 431, and the plug blocks 436 are plugged into the inside of the slots 437. The cover 432 is opened, and medicine is added to the medicine box 41 through the medicine adding tube 431. The setting of the filter screen 435 can filter the medicine to be added to the medicine box 41 to prevent impurities such as stones from entering the medicine box 41, and the setting of the plug block 436 and the slot 437 can remove the filter screen 435, clean it and install it. After the addition of medicine is completed, the cover 432 is closed. Due to the mutual attraction between the first magnet 433 and the second magnet 434, the cover 432 is firmly fixed on the medicine adding tube 431.

[0027] The stirring mechanism 44 includes a motor 441, which is fixedly connected to the top of the medicine box 41. The output end of the motor 441 passes through the top wall of the medicine box 41 and is fixedly connected to a rotating shaft 442. Stirring blades 443 are fixedly connected to both sides of the rotating shaft 442. When the medicines in the medicine box 41 are stirred by the stirring mechanism 44, the motor 441 is controlled by the central control PLC system 3, and the motor 441 drives the rotating shaft 442 to rotate, and the rotating shaft 442 drives the stirring blades 443 to continuously rotate and stir, so that the medicines in the medicine box 41 can be stirred evenly, so that the concentration of the medicines is more uniform and stable when used, avoiding the occurrence of uneven drug addition in the later stage, and improving the stability of the drug efficacy during drug addition.

[0028] When phosphorus-containing sewage enters the water inlet tank 5, the total phosphorus data in the sewage at this time is monitored by the inlet total phosphorus monitoring device 10, and the data monitored by the inlet total phosphorus monitoring device 10 is transmitted to the central control PLC system 3. Then the sewage enters the flotation tank 2, and the medicine is added to the flotation tank 2 through the dosing system 4. The sewage after phosphorus removal enters the outlet tank 6, and the total phosphorus data of the sewage in the outlet tank 6 is monitored by the outlet total phosphorus monitoring device 11. The outlet total phosphorus monitoring device 11 transmits the monitored data to the central control PLC system 3. The central control PLC system 3 further adjusts the dosage of the agent in the flotation tank 2 according to the difference between the total phosphorus data of the inlet water of the flotation tank 2 and the total phosphorus data of the outlet water, and combines the outlet total phosphorus control index. The central control PLC system 3 realizes the unattended and accurate dosing of the agent in the flotation tank 2 through the above-mentioned automatic adjustment function; The water in the water inlet tank 5 and the water outlet tank 6 can be tumbled and stirred by the rotating mechanism 8. The water flow in the water inlet tank 5 and the water outlet tank 6 causes the ring plate 82 to rotate on the surface of the fixed rod 81. The rotating ring plate 82 drives the rotating blades 83 to rotate, so that the rotating rotating blades 83 can stir the water. The stirred water can make the phosphorus molecules in the sewage more uniform, so that the data of the inlet total phosphorus monitoring device 10 and the outlet total phosphorus monitoring device 11 during monitoring are more accurate, which facilitates the accurate dosing of the dosing system 4 and improves the precision of the device. Before the dosing system 4 works, the dosing mechanism 43 in the dosing system 4 is used to add medicines into the medicine box 41. Then, the stirring mechanism 44 is used to continuously stir the medicines in the medicine box 41. After stirring, the medicines are more uniform and the efficacy is more stable. Then, the dosing mechanism 42 is used to quantitatively add medicines into the flotation tank 2. When adding medicines to the medicine box 41 through the medicine adding mechanism 43, the cover plate 432 is opened, and medicines are added to the medicine box 41 through the medicine adding tube 431. The setting of the filter screen 435 can filter the medicines to be added to the medicine box 41 to prevent impurities such as stones from entering the medicine box 41, and the setting of the plug block 436 and the slot 437 can remove the filter screen 435 for cleaning and installation. After the addition of medicines is completed, the cover plate 432 is closed. Due to the mutual attraction between the first magnet 433 and the second magnet 434, the cover plate 432 is firmly fixed on the medicine adding tube 431; When the medicine in the medicine box 41 is stirred by the stirring mechanism 44, the motor 441 is controlled by the central control PLC system 3 to work, the motor 441 drives the rotating shaft 442 to rotate, and the rotating shaft 442 drives the stirring blade 443 to rotate and stir continuously, so that the medicine in the medicine box 41 can be stirred evenly, so that the concentration of the medicine is more uniform and stable when it is used, avoiding the occurrence of uneven dosing in the later stage, and improving the stability of the drug effect when adding the medicine; When adding medicine to the flotation tank 2 through the dosing mechanism 42, the electromagnetic metering diaphragm pump 423 is controlled to work through the central control PLC system 3, and the electromagnetic metering diaphragm pump 423 draws the medicine in the medicine box 41 to the inside of the metering cylinder 421 through the extraction pipe 422. The data of the electromagnetic metering diaphragm pump 423 is transmitted to the central control PLC system 3 until the required amount is drawn. The central control PLC system 3 controls the electromagnetic metering diaphragm pump 423 to stop working, and the central control PLC system 3 controls the one-way electromagnetic valve 425 to open and the booster pump 426 to work. The medicine in the metering cylinder 421 enters the square tube 427 through the connecting pipe 424, and is finally sprayed into the flotation tank 2 through the nozzle 428. The liquid level of the medicine in the metering cylinder 421 is monitored by the liquid level sensor 429 with the model MY-136, and the monitoring data is transmitted to the central control PLC system 3 until the medicine in the metering cylinder 421 is used up, thereby realizing the quantitative dosing of the flotation tank 2; The electromagnetic metering diaphragm pump 423 , the one-way electromagnetic valve 425 , the booster pump 426 , the liquid level sensor 429 , the motor 441 , the inlet total phosphorus monitoring device 10 and the outlet total phosphorus monitoring device 11 are all electrically connected to the external power supply through the central control PLC system 3 .

[0029] This embodiment discloses a method for intelligently controlling air flotation and dosing for phosphorus removal, comprising the following steps: S1: The total phosphorus data in the water inlet tank 5 is monitored by the water inlet total phosphorus monitoring device 10, and the data monitored by the water inlet total phosphorus monitoring device 10 is transmitted to the central control PLC system 3, and the central control PLC system 3 controls the dosing system 4 to adjust the dosage of the agent according to the value; S2: the effluent total phosphorus monitoring device 11 monitors the total phosphorus data in the effluent tank 6, and the effluent total phosphorus monitoring device 11 transmits the monitored data to the central control PLC system 3; S3: The central control PLC system 3 further adjusts the dosage of the reagent in the flotation tank 2 according to the difference between the total phosphorus data of the influent and the effluent of the flotation tank 2 and the effluent total phosphorus control index; S4: The central control PLC system 3 realizes unattended flotation tank 2 and accurate dosing of chemicals through the automatic adjustment function; Specifically, the wastewater after secondary treatment in the sewage treatment plant is introduced into the flotation tank 2 process, and the total phosphorus data of the inlet tank 5 is monitored by the inlet total phosphorus monitoring device 10, with a detection range of 0-2mg / L, and the data is accurate to 3 decimal places. The monitoring is performed once every 2 hours, and the total phosphorus data of the inlet tank 5 is monitored. The inlet total phosphorus data of the flotation tank 2 is transmitted to the central control PLC system 3 through a signal. The central control PLC system 3 initially starts the flotation tank 2 dosing system 4 system according to the set value when the inlet total phosphorus exceeds 0.4mg / L. The wastewater treated by the flotation tank 2 is discharged into the outlet tank 6, and the outlet total phosphorus monitoring device 11 is used to monitor the total phosphorus data in the outlet tank 6. The data is transmitted to the central control PLC system 3 through a signal. The central control PLC system 3 starts the flotation tank 2 dosing system according to the set value. The data is higher than 0.3mg / L and lower than 0.2mg / L and the total phosphorus index requirement of the sewage outlet. At the same time, combined with the fluctuation of the total phosphorus data in the water inlet tank 5 of the flotation tank 2, the dosing system 4 of the flotation tank 2 is gradually corrected. When the total phosphorus in the water outlet tank 6 is higher than 0.3mg / L, the dosage of the agent is gradually increased by 10mg / L. When the total phosphorus in the water outlet tank 6 is 0.2-0.3mg / L, the dosage of the agent is gradually reduced by 10mg / , and when the total phosphorus in the water outlet tank 6 is below 0.2mg / L, the dosage of the agent is gradually stopped. The central control PLC system 3 is used through the above correction method to realize intelligent control of the flotation tank 2 for phosphorus removal, which can realize real-time accurate dosage of the agent, greatly reduce the manpower input during operation, and greatly save the use of the agent.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent controlled air flotation dosing and phosphorus removal device, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to an air flotation tank (2), the front of the air flotation tank (2) is fixedly connected to a central control PLC system (3), the back of the air flotation tank (2) is provided with a dosing system (4), the top of one side of the air flotation tank (2) is fixedly connected to a water inlet tank (5), the bottom of the other side of the air flotation tank (2) is fixedly connected to a water outlet tank (6), the bottom of one side of the water outlet tank (6) is fixedly connected to a drainage pipe (7), the inside of the water inlet tank (5) and the water outlet tank (6) are both provided with a rotating mechanism (8), the bottom of the water inlet tank (5) and the top of the base (1) are fixedly connected to an L-shaped bracket (9), the top of the L-shaped bracket (9) and the bottom of the water inlet tank (5) are fixedly connected to an inlet total phosphorus monitoring device (10), the top of the base (1) is fixedly connected to an outlet total phosphorus monitoring device (11), and the outlet total phosphorus monitoring device (11) is fixedly connected to the back of the outlet tank (6).

2. The device for intelligently controlling air flotation and adding chemicals for phosphorus removal according to claim 1 is characterized in that: The rotating mechanism (8) comprises a fixed rod (81), the fixed rod (81) being fixedly connected to the inner wall of the water inlet box (5) and the inner wall of the water outlet box (6), a ring plate (82) being rotatably connected to the surface of the fixed rod (81), the number of the ring plates (82) being set to be multiple, a rotating blade (83) being fixedly connected to the surface of the ring plate (82), and an air hole (84) being provided on the surface of the rotating blade (83).

3. The intelligent control air flotation dosing and phosphorus removal device according to claim 1 is characterized in that: The dosing system (4) comprises a medicine box (41), the medicine box (41) being fixedly connected to the back of the flotation tank (2), a dosing mechanism (42) being arranged on the top of the medicine box (41), a medicine adding mechanism (43) being arranged on one side of the top of the medicine box (41), and stirring mechanisms (44) being arranged on both sides of the interior of the medicine box (41).

4. The device for intelligently controlling air flotation and adding chemicals for phosphorus removal according to claim 3 is characterized in that: The drug adding mechanism (42) comprises a metering cylinder (421), the metering cylinder (421) being fixedly connected to the top of the medicine box (41), an extraction tube (422) being connected to the bottom tube on one side of the metering cylinder (421), one end of the extraction tube (422) passing through the top wall of the medicine box (41) and extending into the interior of the medicine box (41), an electromagnetic metering diaphragm pump (423) being fixedly connected to the surface of the extraction tube (422), the electromagnetic metering diaphragm pump (423) being fixedly connected to the top of the medicine box (41), and a connecting tube (424) being connected to the bottom tube on the other side of the metering cylinder (421).

5. The device for intelligently controlling air flotation and adding chemicals for phosphorus removal according to claim 4 is characterized in that: The input end of the connecting pipe (424) is fixedly connected to a one-way electromagnetic valve (425); the surface of the connecting pipe (424) is fixedly connected to a booster pump (426); the booster pump (426) is fixedly connected to the back of the flotation tank (2); the output end of the connecting pipe (424) extends to the inside of the flotation tank (2) and is connected to a square tube (427); the bottom of the square tube (427) is connected to a nozzle (428); and the inside of the quantitative cylinder (421) is fixedly connected to a liquid level sensor (429).

6. The intelligent control air flotation dosing and phosphorus removal device according to claim 3 is characterized by: The medicine adding mechanism (43) comprises a medicine adding tube (431), the medicine adding tube (431) is fixedly connected to the top of the medicine box (41), the top of the medicine adding tube (431) is rotatably connected to a cover plate (432), the bottom of the cover plate (432) is fixedly connected to a first magnet (433), the top of the medicine adding tube (431) is fixedly connected to a second magnet (434), and the first magnet (433) and the second magnet (434) have opposite magnetic properties.

7. The intelligent control air flotation and dosing phosphorus removal device according to claim 6 is characterized by: A filter screen (435) is placed inside the medicine adding tube (431), plug blocks (436) are fixedly connected to both sides of the filter screen (435), slots (437) are provided on both sides of the top of the medicine adding tube (431), and the plug blocks (436) are plugged into the inside of the slots (437).

8. The intelligent controlled air flotation and dosing phosphorus removal device according to claim 3 is characterized by: The stirring mechanism (44) comprises a motor (441), the motor (441) being fixedly connected to the top of the medicine box (41), the output end of the motor (441) passing through the top wall of the medicine box (41) and being fixedly connected to a rotating shaft (442), and stirring blades (443) being fixedly connected to both sides of the rotating shaft (442).

9. A method for intelligently controlling phosphorus removal by flotation and chemical addition, based on the device for intelligently controlling phosphorus removal by flotation and chemical addition as claimed in claim 1, characterized in that: The following steps are involved: S1: monitoring the total phosphorus data in the water inlet tank (5) through the water inlet total phosphorus monitoring device (10), transmitting the data monitored by the water inlet total phosphorus monitoring device (10) to the central control PLC system (3), and the central control PLC system (3) controlling the dosing system (4) to adjust the dosage of the agent according to the value; S2: the effluent total phosphorus monitoring device (11) monitors the total phosphorus data in the effluent tank (6), and the effluent total phosphorus monitoring device (11) transmits the monitored data to the central control PLC system (3); S3: the central control PLC system (3) further adjusts the dosage of the reagent in the flotation tank (2) according to the difference between the total phosphorus data of the influent and the total phosphorus data of the effluent of the flotation tank (2) and the effluent total phosphorus control index; S4: The central control PLC system (3) realizes unmanned operation of the flotation tank (2) and accurate dosing of the reagents through the above-mentioned automatic adjustment function.

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