Sewage treatment device with intelligent phosphorus removal agent adding system

Abstract

The invention discloses a sewage treatment device with an intelligent phosphorus removal agent adding system, which comprises a phosphorus removal agent adding system, an oxidation ditch structure and a secondary sedimentation tank, and the secondary sedimentation tank is communicated with the oxidation ditch structure; in the whole phosphorus removal agent adding process, the phosphorus removal agent can be automatically added according to the orthophosphate measured value measured by orthophosphate measuring equipment, and in the circulating regulation process, the influence of the initial orthophosphate demand value can be gradually reduced, so that the timeliness in the whole adding system is higher, the adding amount of the phosphorus removal agent is more accurate, and the phosphorus removal efficiency is improved. The orthophosphate index of the effluent of the secondary sedimentation tank is stable and close to the required value, and the dephosphorization effect is better; the stirring structure is arranged to mix water and iron salt on site and prepare the phosphorus removal agent, so that the iron salt content is more stable, the prepared phosphorus removal agent is temporarily stored in the agent temporary storage bin, the spiral shoveling plate is used for continuously mixing bottom liquid and upper liquid, the iron salt content is uniform, and the iron salt content in the added phosphorus removal agent is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and specifically to a sewage treatment device with an intelligent dosing system for phosphorus remover. Background Technique

[0002] A sewage treatment plant is a place where sewage (wastewater) discharged from pollution sources needs to be artificially treated intensively because the total amount or concentration of pollutants is high, it does not meet the discharge standard requirements or is not suitable for the environmental capacity requirements, thus reducing the water environment quality and functional goals. Among them, phosphorus removal in sewage treatment is particularly crucial. Currently, after sand and water separation in sewage treatment plants, biological treatment is carried out in biological ponds. However, simple biological treatment cannot completely remove phosphorus, so additional phosphorus remover needs to be added for treatment. Currently, the main phosphorus removers are ferric salts, aluminum salts, etc., and ferric salt phosphorus removers are more widely used. For example, the Chinese invention patent with the authorization announcement number CN220466421U discloses a phosphorus remover storage and dosing device for sewage plants, including a box body, a base, a storage tank, a vacuum pumping structure, and an air intake structure. The base is arranged in the box body, the storage tank lies on the base, the top of the storage tank is provided with a feed inlet for feeding, a stop valve is arranged at the feed inlet, the bottom of the storage tank is provided with a discharge outlet for discharging, and the vacuum pumping structure includes a vacuum pump, a suction pipe, and a check valve. The vacuum pump is installed on the outer peripheral surface of the storage tank. Currently, most sewage treatment plants mainly adopt manual control in the daily dosing control of phosphorus removers. This method has the following defects:

[0003] The dosage of manually added phosphorus remover can only be empirically controlled by the feedback of the total phosphorus in the effluent or by testing the orthophosphate data during the effluent process of the biological pond. Both have delays, resulting in deviations in the added amount of phosphorus remover, large fluctuations in the orthophosphate index in the effluent of the secondary sedimentation tank, and poor phosphorus removal effect. And the phosphorus remover is prepared by mixing ferric salt with water, and it is easy to have the phenomenon of uneven distribution or deposition of ferric salt in the phosphorus remover, resulting in uneven ferric salt content in the phosphorus remover, which will also affect the calculation of the dosing amount, resulting in deviations in the added ferric salt content and affecting the phosphorus removal effect.

[0004] Therefore, we propose a sewage treatment device with an intelligent dosing system for phosphorus remover to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a sewage treatment device with an intelligent dosing system for phosphorus remover to solve the problems raised in the above background technique.

[0006] To achieve the above object, the present invention provides the following technical solution: A sewage treatment device with an intelligent dosing system for phosphorus removal agent, including a phosphorus removal agent dosing system, an oxidation ditch structure and a secondary sedimentation tank. The secondary sedimentation tank is connected to the oxidation ditch structure. The phosphorus removal agent dosing system includes a box body. On one side inside the box body, there is a chemical mixing bin. On the other side inside the box body, there is a chemical storage bin fixedly connected. Between the chemical mixing bin and the chemical storage bin inside the box body, there is a driving structure arranged. On one side of the box body, there are a water tank, a PLC controller and a central control system fixedly connected. On the top surface of the box body, there is an iron salt box fixedly connected. Both the water tank and the iron salt box are connected to the chemical mixing bin. The chemical mixing bin is in the shape of a horizontal cylinder, and there is a stirring structure arranged inside the chemical mixing bin;

[0007] On the outer side wall of the box body near the chemical storage bin, there is a dosing pump fixedly connected. On the dosing pump, there is a dosing pipe fixedly connected and communicated. At the bottom of the chemical storage bin, there is a chemical outlet horizontally fixedly connected and communicated. The chemical outlet penetrates through the side wall of the box body, and the end of the chemical outlet is fixedly connected and communicated with the dosing pump. The oxidation ditch structure includes a first ditch, a second ditch, a third ditch and a dosing component. The dosing pipe is connected to the dosing component;

[0008] Inside the chemical storage bin, a stirring vertical shaft is vertically rotatably connected at the center. On the peripheral side of the stirring vertical shaft, a plurality of stirring plates are evenly fixedly connected. At the bottom end of the stirring vertical shaft, there is a spiral shoveling plate fixedly connected. On the secondary sedimentation tank, there is an outlet fixedly connected and communicated. On the outlet, there is a orthophosphate determination device fixedly connected;

[0009] The stirring structure includes a main shaft. The main shaft is horizontally rotatably connected at the middle position of the chemical mixing bin. At the position of the main shaft away from the driving structure, there is a fixed stirring shaft sleeve fixedly sleeved. At the position of the main shaft close to the driving structure, there is a movable stirring shaft sleeve rotatably sleeved. On the peripheral side of the fixed stirring shaft sleeve, a plurality of first main stirring blades are evenly fixedly connected. At the ends of the plurality of first main stirring blades, a plurality of first shoveling plates are fixedly connected. On the peripheral side of the movable stirring shaft sleeve, a plurality of second main stirring blades are evenly fixedly connected. At the ends of the plurality of second main stirring blades, a plurality of second shoveling plates are fixedly connected.

[0010] Preferably, on the plurality of first main stirring blades, a plurality of first sub-stirring shafts are horizontally rotatably arranged. The first sub-stirring shafts are rotatably sleeved in the middle parts of the plurality of first main stirring blades at the same horizontal position. At the position between the plurality of first main stirring blades on the first sub-stirring shafts, a plurality of first sub-stirring blades are fixedly connected. On the plurality of second main stirring blades, a second sub-stirring shaft is horizontally rotatably arranged. The second sub-stirring shafts are rotatably sleeved in the middle parts of the plurality of second main stirring blades at the same horizontal position. At the position between the plurality of second main stirring blades on the second sub-stirring shafts, a plurality of second sub-stirring blades are fixedly connected.

[0011] Preferably, a first annular groove is formed at one end of the medicine mixing bin close to the fixed stirring shaft sleeve, and a second annular groove is formed at one end of the medicine mixing bin close to the moving stirring shaft sleeve. A first sealing ring plate is rotatably sleeved on the side wall of the first annular groove. The ends of a plurality of the first sub-stirring shafts pass through the first sealing ring plate and are fixedly connected with first driven gears. The first sub-stirring shafts are rotatably sleeved on the first sealing ring plate. A first internal toothed ring is fixedly connected to the side wall of the first annular groove. The first internal toothed ring is meshed with the first driven gears on a plurality of the first sub-stirring shafts. A second sealing ring plate is rotatably sleeved on the side wall of the second annular groove. The second sub-stirring shafts pass through the second sealing ring plate and are fixedly connected with second driven gears. The second sub-stirring shafts are rotatably sleeved on the second sealing ring plate. A second internal toothed ring is fixedly connected to the side wall of the second annular groove. The second internal toothed ring is meshed with the second driven gears on a plurality of the second sub-stirring shafts.

[0012] Preferably, two short shafts are fixedly connected to both sides of the middle of the main shaft. The two short shafts are located between the fixed stirring shaft sleeve and the moving stirring shaft sleeve. The ends of the two short shafts are fixedly connected to the inner side wall of the sealing bin. The outer rings of two sealing bearings are fixedly sleeved at both ends of the short shafts. The inner ring of one of the sealing bearings is fixedly sleeved on the side wall of the end of the fixed stirring shaft sleeve, and the inner ring of the other sealing bearing is fixedly sleeved on the side wall of the end of the moving stirring shaft sleeve.

[0013] Preferably, a first bevel gear ring is fixedly connected to one end of the fixed stirring shaft sleeve located inside the sealing bin, and a second bevel gear ring is fixedly connected to one end of the moving stirring shaft sleeve located inside the sealing bin. A reversing bevel gear is rotatably sleeved on each short shaft. The two sides of the reversing bevel gear are respectively meshed with the first bevel gear ring and the second bevel gear ring.

[0014] Preferably, the medicine adding assembly includes two legs. The two legs are located on both sides of the first groove. A strip plate is fixedly connected between the tops of the two legs. The bottom surface of the strip plate is fixedly connected with a main pipe body. The bottom surface of the main pipe body is fixedly connected and communicated with a plurality of medicine adding ports. The end of the main pipe body is fixedly connected and communicated with a liquid inlet pipe. The end of the liquid inlet pipe is fixedly connected and communicated with a medicine adding pipe.

[0015] Preferably, the driving structure includes a side bin and a top bin. The side bin is fixedly connected to the end of the chemical mixing bin. The top bin is fixedly connected to the top side wall of the side bin. The bottom surface of the top bin is fixedly connected to the top surface of the chemical storage bin. The interior of the top bin is in communication with the interior of the side bin. A first driving shaft is horizontally rotatably connected to the side wall of the side bin corresponding to the center position of the chemical mixing bin. The end of the first driving shaft is fixedly connected to the end of the main shaft. A second driving shaft is vertically rotatably connected to the center position of the chemical storage bin on the top bin. The bottom end of the second driving shaft is fixedly connected to the top end of the stirring vertical shaft. A driving shaft is vertically rotatably connected in the side bin. A driving bevel gear is fixedly sleeved on the driving shaft. One end of the first driving shaft located inside the side bin is fixedly connected to a driven bevel gear. The driving bevel gear is meshed and connected to the driven bevel gear. The diameter of the driving bevel gear is smaller than that of the driven bevel gear. A middle rotating shaft is vertically rotatably connected to the position between the driving shaft and the second driving shaft on the top bin. A driving pulley is fixedly sleeved on the driving shaft. A driven pulley is fixedly sleeved on the middle rotating shaft. A synchronous belt is sleeved on the driving pulley and the driven pulley. A driving pinion is fixedly sleeved on the middle rotating shaft. A driven gear is fixedly sleeved on the second driving shaft. The driving pinion is meshed and connected to the driven gear. A driving motor is fixedly sleeved on the top of the side bin. The bottom end of the rotating shaft end of the driving motor is fixedly connected to the top end of the driving shaft.

[0016] Preferably, the second groove is fixedly connected to the inner side wall of the first groove. The third groove is fixedly connected to the inner side wall of the second groove. The central island is fixedly connected to the middle of the third groove. A first hole is opened on the outer side wall of the second groove. A second hole is opened on the outer side wall of the third groove. The outer side wall of the first groove is fixedly connected and communicated with the drain outlet and the sludge return port. The sewage inlet is fixedly connected to the first groove. A plurality of aeration members are fixedly connected to the top surfaces of the first groove, the second groove and the third groove.

[0017] Preferably, a water inlet pipe and a sludge pipe are fixedly connected and communicated with the secondary sedimentation tank. The water inlet pipe is fixedly connected and communicated with the drain outlet. The sludge pipe is fixedly connected and communicated with the sludge return port.

[0018] Preferably, two brackets are fixedly sleeved at both ends of the chemical mixing bin. The brackets are fixedly connected to the bottom surface of the box body. The top surface of the water tank is fixedly connected and communicated with a metering pump. The metering pump is fixedly connected and communicated with a main water pipe. The main water pipe is fixedly connected and communicated with a shunt water pipe. The shunt water pipe passes through the box body. The end of the shunt water pipe is fixedly connected and communicated with the chemical mixing bin. A plurality of powder pumps are fixedly connected and communicated with the iron salt box. Each powder pump is fixedly connected and communicated with a powder supply pipe. The powder supply pipe passes through the box body. The end of the powder supply pipe is fixedly connected and communicated with the chemical mixing bin.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] During the entire dosing process of the phosphorus removal agent in the present invention, only the initial orthophosphate demand value and the dosing coefficient of the agent need to be manually input. These two values are judged based on the experience of the sewage treatment plant. Subsequently, during the entire dosing process of the agent, the dosing of the phosphorus removal agent will be automatically carried out according to the orthophosphate measurement value measured by the orthophosphate measurement equipment. In this cyclic regulation process, the influence of the initial orthophosphate demand value will be gradually reduced, making the timeliness stronger in the entire dosing system, the dosing amount of the phosphorus removal agent more accurate, ensuring that the orthophosphate index of the effluent from the secondary sedimentation tank is stable and close to the demand value, and the phosphorus removal effect is better. In the present invention, a stirring structure is set to mix water and iron salt on-site to produce the phosphorus removal agent, so that the iron salt content is more stable. The prepared phosphorus removal agent is temporarily stored in the agent temporary storage bin and continuously stirred by the set stirring plate. The spiral shoveling plate is used to continuously mix the bottom liquid and the upper liquid, ensuring the uniformity of the iron salt content and making the iron salt content in the added phosphorus removal agent more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagrams of the main structures in the first and second embodiments of the present invention;

[0022] Figure 2 Schematic diagrams of the structures at the phosphorus removal agent dosing system in the first and second embodiments of the present invention;

[0023] Figure 3 Schematic diagrams of the sectional structures at the phosphorus removal agent dosing system in the first and second embodiments of the present invention;

[0024] Figure 4 Schematic diagrams of the sectional structures at the agent mixing bin in the first and second embodiments of the present invention;

[0025] Figure 5 Schematic diagrams of the sectional structures at the agent temporary storage bin in the first and second embodiments of the present invention;

[0026] Figure 6 Schematic diagrams of the structures at the stirring structure in the first and second embodiments of the present invention;

[0027] Figure 7 Schematic diagrams of the structures at the oxidation ditch in the second embodiment of the present invention;

[0028] Figure 8 Schematic diagrams of the sectional structures at the driving structure in the second embodiment of the present invention;

[0029] Figure 9 Schematic diagrams of the sectional structures at the moving stirring shaft sleeve and the fixed stirring shaft sleeve in the second embodiment of the present invention;

[0030] Figure 10 In the present invention Figure 4 Enlarged schematic diagram of the structure at A;

[0031] Figure 11 For the present invention Figure 4 is a schematic enlarged view of the structure at position B in the present invention.

[0032] In the figure: 1, phosphorus removal agent dosing system; 2, oxidation ditch structure; 3, secondary sedimentation tank; 11, box body; 12, water tank; 13, ferric salt tank; 14, reagent mixing bin; 15, reagent temporary storage bin; 16, stirring structure; 17, driving structure; 18, stirring vertical shaft; 19, stirring plate; 110, spiral shoveling plate; 111, reagent outlet; 112, dosing pump; 113, dosing pipe; 114, metering pump; 115, main water pipe; 116, water diversion pipe; 117, powder pump; 118, powder supply pipe; 119, plc controller; 120, central control system; 121, bracket; 122, first annular groove; 123, first internal gear ring; 124, second annular groove; 125, second internal gear ring; 161, main shaft; 162, fixed stirring shaft sleeve; 163, movable stirring shaft sleeve; 164, first main stirring blade; 165, first shovel plate; 166, first sub-stirring shaft; 167, first sub-stirring blade; 168, first sealing ring plate; 169, first driven gear; 1610, second main stirring blade; 1611, second shovel plate; 1612, second sub-stirring shaft; 1613, second sub-stirring blade; 1614, second sealing ring plate; 1615, second driven gear; 1616, short shaft; 1617, sealing bin; 1618, reversing bevel gear; 1619, first bevel gear ring; 1620, second bevel gear ring; 1621, sealed bearing; 171, side bin; 172, top bin; 173, first driving shaft; 174, second driving shaft; 175, driving shaft; 176, driving bevel gear; 177, driven bevel gear; 178, middle rotating shaft; 179, driving pulley; 1710, driven pulley; 1711, synchronous belt; 1712, driving pinion; 1713, driven gear; 1714, driving motor; 21, first ditch; 22, second ditch; 23, third ditch; 24, central island; 25, dosing assembly; 26, first hole; 27, second hole; 28, sewage inlet; 29, drain outlet; 210, sludge return port; 211, aeration part; 251, support leg; 252, strip board; 253, main pipe body; 254, dosing port; 255, inlet pipe; 31, outlet; 32, orthophosphate determination equipment; 33, inlet pipe; 34, sludge pipe. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0034] Example 1:

[0035] Please refer to Figures 1-6 , the present invention provides a technical solution: a sewage treatment device with an intelligent dosing system for phosphorus remover, including a phosphorus remover dosing system 1, an oxidation ditch structure 2 and a secondary sedimentation tank 3. The secondary sedimentation tank 3 is connected to the oxidation ditch structure 2. The phosphorus remover dosing system 1 includes a box body 11. On one side inside the box body 11, there is a reagent mixing bin 14. On the other side inside the box body 11, there is a reagent temporary storage bin 15 fixedly connected. Inside the box body 11, at the position between the reagent mixing bin 14 and the reagent temporary storage bin 15, there is a driving structure 17. On one side of the box body 11, there is a water tank 12, a plc controller 119 and a central control system 120 fixedly connected. On the top surface of the box body 11, there is an iron salt box 13 fixedly connected. Both the water tank 12 and the iron salt box 13 are connected to the reagent mixing bin 14. The reagent mixing bin 14 is in the shape of a horizontal cylinder. Inside the reagent mixing bin 14, there is a stirring structure 16. By setting the stirring structure 16, water and iron salt are mixed on-site to produce the phosphorus remover, so that the iron salt content is more stable;

[0036] On the outer side wall of the box body 11, near the position of the reagent temporary storage bin 15, there is a dosing pump 112 fixedly connected. On the dosing pump 112, there is a dosing pipe 113 fixedly connected and communicated. At the bottom of the reagent temporary storage bin 15, there is a reagent outlet 111 fixedly connected and horizontally communicated. The reagent outlet 111 penetrates through the side wall of the box body 11. The end of the reagent outlet 111 is fixedly connected and communicated with the dosing pump 112. The oxidation ditch structure 2 includes a first ditch 21, a second ditch 22, a third ditch 23 and a dosing component 25. The dosing pipe 113 is connected to the dosing component 25;

[0037] Inside the reagent temporary storage bin 15, in the center, there is a stirring vertical shaft 18 rotatably connected vertically. On the circumferential side of the stirring vertical shaft 18, there are a plurality of stirring plates 19 fixedly connected evenly. At the bottom end of the stirring vertical shaft 18, there is a spiral shoveling plate 110 fixedly connected. On the secondary sedimentation tank 3, there is an outlet 31 fixedly connected and communicated. On the outlet 31, there is an orthophosphate measuring device 32 fixedly connected. The phosphorus remover is temporarily stored in the reagent temporary storage bin 15. Through the arranged stirring plates 19, continuous stirring is carried out, and the spiral shoveling plate 110 is used to continuously mix the bottom liquid and the upper liquid, ensuring the uniformity of the iron salt content and making the iron salt content in the added phosphorus remover more accurate;

[0038] The stirring structure 16 includes a main shaft 161, which is horizontally rotatably connected to the middle position of the chemical mixing bin 14. A fixed stirring shaft sleeve 162 is fixedly sleeved at a position of the main shaft 161 away from the driving structure 17, and a movable stirring shaft sleeve 163 is rotatably sleeved at a position of the main shaft 161 close to the driving structure 17. A plurality of first main stirring blades 164 are evenly fixedly connected to the peripheral side of the fixed stirring shaft sleeve 162, and a plurality of first shoveling plates 165 are fixedly connected to the ends of the plurality of first main stirring blades 164. A plurality of second main stirring blades 1610 are evenly fixedly connected to the peripheral side of the movable stirring shaft sleeve 163, and a plurality of second shoveling plates 1611 are fixedly connected to the ends of the plurality of second main stirring blades 1610. The stirring structure 16 uses the fixed stirring shaft sleeve 162 and the movable stirring shaft sleeve 163 for stirring, and the two stirring shaft sleeves rotate in opposite directions to achieve a multi-directional stirring effect;

[0039] The specific method of automatic addition of the phosphorus remover is as follows: First step: Input the orthophosphate demand value K on the central control system 120. This value only affects the initial chemical addition amount, and in subsequent cyclic regulation, the influence of this value will be gradually reduced. The initial value K can be set according to the experience of the sewage treatment plant; Second step: Determine the rated flow rate of the dosing pump 112. For example, if the rated flow rate of the dosing pump 112 is 50 L / h, then the rated flow rate of 1 stroke at 1 HZ frequency of the dosing pump 1121 is 50 L / h÷50 HZ÷100 strokes = 0.01 L / h; Third step: Determine the density of the iron salt in the phosphorus remover. For example, the iron salt density is 1.475 kg / L; Fourth step: Determine the rated flow rate of the converted addition: 50 L / h÷1.475 kg / L = 73.75 kg / h, then the rated flow rate of 100 strokes at 1 HZ frequency of the dosing pump 1121 is: 73.75 kg / h÷50 HZ = 1.475 kg / h; Fifth step: Calculate the initial value of the theoretical addition unit consumption (calculated according to the current situation without adding the phosphorus remover and no orthophosphate display): 1 km 3 of water requires adding A kg of medicine, that is, the unit consumption = A (kg / km 3 ), and the theoretical value of the iron salt unit consumption A =

(orthophosphate in the biological pond effluent - orthophosphate demand value)×(56 / 31)×φ

(orthophosphate in the biological pond effluent - orthophosphate demand value)×(56 / 31)×φ

[0040] Taking the above steps 1 to 8 as an example: Currently, the influent flow rate is 500 m 3 / h, the orthophosphate value of the effluent from the biological tank is tentatively set at 1.2, the required orthophosphate demand value is tentatively set at 0.6, the rated flow rate of the chemical dosing pump 112 is 50 L / h, and it is operated at 50 strokes (adjusted according to the actual situation, try not to move. Once adjusted on-site, the input value in the central control system should be consistent with the on-site value). The chemical dosing coefficient is 4, then the feedback frequency is: This frequency changes with the change of the flow rate of 500;

[0041] Step 9: The displayed value of the orthophosphate measurement device 32 is connected to the central control system 120, and the sampling period for orthophosphate measurement is set to Nh; Step 10: Before Nh, the frequency of the chemical dosing pump 112 changes with the flow rate. After Nh, the measured orthophosphate amount of the sample taken out by the orthophosphate measurement device 32 is X; Step 11: Compare the measured orthophosphate amount X with the orthophosphate demand value K to judge the difference between the X and K values; If X > K, the chemical dosing amount is insufficient, and the insufficient dosing amount is

|X - K|×(56 / 31)×4

|X - K|×(56 / 31)×4

[0042] During the entire process of adding the phosphorus removal agent, only the initial demand value of orthophosphate and the agent addition coefficient need to be manually input. These two values are determined based on the experience of the sewage treatment plant. After that, during the entire process of adding the agent, the automatic addition of the phosphorus removal agent will be carried out according to the orthophosphate measurement value measured by the orthophosphate measurement device 32. In this cyclic regulation process, the influence of the initial demand value of orthophosphate will be gradually reduced, making the timeliness stronger in the entire dosing system, the addition amount of the phosphorus removal agent more accurate, ensuring that the orthophosphate index in the effluent of the secondary sedimentation tank 3 is stable and close to the demand value, and the phosphorus removal effect is better.

[0043] Embodiment 2:

[0044] Please refer to Figures 1-11 , which is the second embodiment of the present invention. Based on the previous embodiment, a plurality of first sub-stirring shafts 166 are horizontally rotatably arranged on a plurality of first main stirring blades 164. The first sub-stirring shafts 166 are rotatably sleeved on the middle parts of a plurality of first main stirring blades 164 at the same horizontal position. A plurality of first sub-stirring blades 167 are fixedly connected to the positions of the first sub-stirring shafts 166 between the plurality of first main stirring blades 164. A second sub-stirring shaft 1612 is horizontally rotatably arranged on a plurality of second main stirring blades 1610. The second sub-stirring shafts 1612 are rotatably sleeved on the middle parts of a plurality of second main stirring blades 1610 at the same horizontal position. A plurality of second sub-stirring blades 1613 are fixedly connected to the positions of the second sub-stirring shafts 1612 between the plurality of second main stirring blades 1610.

[0045] At one end of the chemical agent mixing bin 14 close to the fixed stirring shaft sleeve 162, a first annular groove 122 is opened. At one end of the chemical agent mixing bin 14 close to the moving stirring shaft sleeve 163, a second annular groove 124 is opened. The side wall of the first annular groove 122 is rotatably sleeved with a first sealing ring plate 168. The ends of a plurality of first sub-stirring shafts 166 pass through the first sealing ring plate 168 and are fixedly connected with first driven gears 169. The first sub-stirring shafts 166 are rotatably sleeved on the first sealing ring plate 168. The side wall of the first annular groove 122 is fixedly connected with a first internal tooth ring 123. The first internal tooth ring 123 meshes with the first driven gears 169 on a plurality of first sub-stirring shafts 166. The side wall of the second annular groove 124 is rotatably sleeved with a second sealing ring plate 1614. The second sub-stirring shafts 1612 pass through the second sealing ring plate 1614 and are fixedly connected with second driven gears 1615. The second sub-stirring shafts 1612 are rotatably sleeved on the second sealing ring plate 1614. The side wall of the second annular groove 124 is fixedly connected with a second internal tooth ring 125. The second internal tooth ring 125 meshes with the second driven gears 1615 on a plurality of second sub-stirring shafts 1612.

[0046] On both sides of the middle of the main shaft 161, two short shafts 1616 are fixedly connected. The two short shafts 1616 are located between the fixed stirring shaft sleeve 162 and the moving stirring shaft sleeve 163. The ends of the two short shafts 1616 are fixedly connected to the inner side wall of the sealing chamber 1617. The outer rings of two sealing bearings 1621 are fixedly sleeved at both ends of the short shaft 1616. The inner ring of one of the sealing bearings 1621 is fixedly sleeved on the end side wall of the fixed stirring shaft sleeve 162, and the inner ring of the other sealing bearing 1621 is fixedly sleeved on the end side wall of the moving stirring shaft sleeve 163.

[0047] One end of the fixed stirring shaft sleeve 162 located inside the sealing chamber 1617 is fixedly connected to the first bevel gear ring 1619. One end of the moving stirring shaft sleeve 163 located inside the sealing chamber 1617 is fixedly connected to the second bevel gear ring 1620. A reversing bevel gear 1618 is rotatably sleeved on each short shaft 1616. The two sides of the reversing bevel gear 1618 are respectively meshed and connected to the first bevel gear ring 1619 and the second bevel gear ring 1620. By rotating the main shaft 161, the moving stirring shaft sleeve 163 and the fixed stirring shaft sleeve 162 are driven to perform two-way stirring work. At the same time, under the action of the first internal gear ring 123 and the second internal gear ring 125, the first sub-stirring shaft 166 and the second sub-stirring shaft 1612 rotate self, performing auxiliary stirring. In this way, water and iron salts will be stirred and mixed in multiple directions and in multiple ways, ensuring the mixing quality of the dephosphorizing agent.

[0048] The chemical dosing assembly 25 includes two legs 251. The two legs 251 are located on both sides of the first groove 21. A strip plate 252 is fixedly connected between the tops of the two legs 251. The bottom surface of the strip plate 252 is fixedly connected to the main pipe body 253. The bottom surface of the main pipe body 253 is fixedly connected and communicated with a plurality of chemical dosing ports 254. The end of the main pipe body 253 is fixedly connected and communicated with the liquid inlet pipe 255. The end of the liquid inlet pipe 255 is fixedly connected and communicated with the chemical dosing pipe 113. The dephosphorizing agent is introduced into the main pipe body 253 through the chemical dosing pump 112 and flows into the oxidation ditch structure 2 through the chemical dosing ports 254.

[0049] The driving structure 17 includes a side bin 171 and a top bin 172. The side bin 171 is fixedly connected to the end of the chemical mixing bin 14. The top bin 172 is fixedly connected to the top side wall of the side bin 171. The bottom surface of the top bin 172 is fixedly connected to the top surface of the chemical temporary storage bin 15. The interior of the top bin 172 is connected to the interior of the side bin 171. A first driving shaft 173 is horizontally rotatably connected to the side wall of the side bin 171 corresponding to the central position of the chemical mixing bin 14. The end of the first driving shaft 173 is fixedly connected to the end of the main shaft 161. A second driving shaft 174 is vertically rotatably connected to the top bin 172 at the central position of the chemical temporary storage bin 15. The bottom end of the second driving shaft 174 is fixedly connected to the top end of the stirring vertical shaft 18. A driving shaft 175 is vertically rotatably connected in the side bin 171. A driving bevel gear 176 is fixedly sleeved on the driving shaft 175. One end of the first driving shaft 173 located inside the side bin 171 is fixedly connected to a driven bevel gear 177. The driving bevel gear 176 is meshed and connected to the driven bevel gear 177. The diameter of the driving bevel gear 176 is smaller than the diameter of the driven bevel gear 177. A middle rotating shaft 178 is vertically rotatably connected to the top bin 172 at a position between the driving shaft 175 and the second driving shaft 174. A driving pulley 179 is fixedly sleeved on the driving shaft 175. A driven pulley 1710 is fixedly sleeved on the middle rotating shaft 178. A synchronous belt 1711 is sleeved on the driving pulley 179 and the driven pulley 1710. A driving pinion 1712 is fixedly sleeved on the middle rotating shaft 178. A driven gear 1713 is fixedly sleeved on the second driving shaft 174. The driving pinion 1712 is meshed and connected to the driven gear 1713. A driving motor 1714 is fixedly sleeved on the top of the side bin 171. The bottom end of the rotating shaft end of the driving motor 1714 is fixedly connected to the top end of the driving shaft 175. The driving structure 17 can drive the stirring structure 16 and the stirring vertical shaft 18 simultaneously, reducing the number of driving sources and the cost.

[0050] The second groove 22 is fixedly connected to the inner side wall of the first groove 21. The third groove 23 is fixedly connected to the inner side wall of the second groove 22. The central island 24 is fixedly connected to the middle of the third groove 23. A first hole 26 is opened on the outer side wall of the second groove 22. A second hole 27 is opened on the outer side wall of the third groove 23. The drain port 29 and the mud return port 210 are fixedly connected and communicated with the outer side wall of the first groove 21. A sewage inlet 28 is fixedly connected to the first groove 21. A plurality of aeration members 211 are fixedly connected to the top surfaces of the first groove 21, the second groove 22 and the third groove 23.

[0051] A water inlet pipe 33 and a sludge pipe 34 are fixedly connected and communicated with the secondary sedimentation tank 3. The water inlet pipe 33 is fixedly connected and communicated with the drain port 29. The sludge pipe 34 is fixedly connected and communicated with the mud return port 210.

[0052] Both ends of the reagent mixing bin 14 are fixedly sleeved with two supports 121. The supports 121 are fixedly connected to the bottom surface of the box body 11. The top surface of the water tank 12 is fixedly connected and communicated with the metering pump 114. The metering pump 114 is fixedly connected and communicated with the main water pipe 115. The main water pipe 115 is fixedly connected and communicated with the shunt water pipe 116. The shunt water pipe 116 passes through the box body 11. The end of the shunt water pipe 116 is fixedly connected and communicated with the reagent mixing bin 14. A plurality of powder pumps 117 are fixedly connected and communicated with the ferric salt box 13. Each powder pump 117 is fixedly connected and communicated with a powder supply pipe 118. The powder supply pipe 118 passes through the box body 11. The end of the powder supply pipe 118 is fixedly connected and communicated with the reagent mixing bin 14.

[0053] Please refer to Figures 1-11 When the present invention is used, the sewage first enters the grit chamber for sand and water separation. The sediment and suspended matter enter the sludge treatment system. The separated sewage enters the oxidation ditch structure 2 for treatment. At the same time, the phosphorus removal agent dosing system 1 inputs the phosphorus removal agent into the oxidation ditch structure 2 through the dosing component 25. The input amount is intervened according to the value of orthophosphate measured by the orthophosphate measuring device 32 at the water outlet 31 of the secondary sedimentation tank 3. The sewage treated by the oxidation ditch structure 2 enters the secondary sedimentation tank 3 for sludge-water separation to clarify the water quality. The sludge enters the sludge treatment system and is recycled back to the oxidation ditch structure 2. The supernatant is discharged after subsequent treatment. During the whole process of dosing the phosphorus removal agent in the present invention, only the initial orthophosphate demand value and the reagent dosing coefficient need to be manually input. These two values are judged based on the experience of the sewage treatment plant. Then, during the whole process of dosing the reagent, the automatic dosing work of the phosphorus removal agent will be carried out according to the orthophosphate measurement value measured by the orthophosphate measuring device 32. In this cyclic regulation process, the influence of the initial orthophosphate demand value will be gradually reduced, making the timeliness stronger in the whole dosing system, the addition amount of the phosphorus removal agent more accurate, ensuring that the orthophosphate index of the water outlet of the secondary sedimentation tank 3 is stable and close to the demand value, and the phosphorus removal effect is better. The present invention mixes water and ferric salt on-site through the stirring structure 16 to produce the phosphorus removal agent, so that the ferric salt content is more stable. The prepared phosphorus removal agent is temporarily stored in the reagent temporary storage bin 15 and is continuously stirred by the arranged stirring plate 19. The spiral shoveling plate 110 continuously mixes the bottom liquid and the upper liquid to ensure the uniformity of the ferric salt content and make the ferric salt content in the added phosphorus removal agent more accurate.

[0054] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sewage treatment device with an intelligent dosing system for phosphorus removal agent, comprising a phosphorus removal agent dosing system (1), an oxidation ditch structure (2) and a secondary sedimentation tank (3), characterized in that: The secondary sedimentation tank (3) is connected to the oxidation ditch structure (2). The phosphorus removal agent dosing system (1) includes a box body (11). On one side inside the box body (11), there is a reagent mixing bin (14). On the other side inside the box body (11), there is a reagent temporary storage bin (15) fixedly connected. A driving structure (17) is arranged at a position between the reagent mixing bin (14) and the reagent temporary storage bin (15) inside the box body (11). On one side of the box body (11), there is a water tank (12), a plc controller (119) and a central control system (120) fixedly connected. On the top surface of the box body (11), there is an iron salt box (13) fixedly connected. The water tank (12) and the iron salt box (13) are both connected to the reagent mixing bin (14). The reagent mixing bin (14) is in the shape of a horizontal cylinder, and a stirring structure (16) is arranged inside the reagent mixing bin (14); On the outer side wall of the box body (11) near the reagent temporary storage bin (15), there is a dosing pump (112) fixedly connected. A dosing pipe (113) is fixedly connected and communicated on the dosing pump (112). At the bottom of the reagent temporary storage bin (15), there is a reagent outlet (111) horizontally fixedly connected and communicated. The reagent outlet (111) penetrates through the side wall of the box body (11). The end of the reagent outlet (111) is fixedly connected and communicated with the dosing pump (112). The oxidation ditch structure (2) includes a first ditch (21), a second ditch (22), a third ditch (23) and a dosing component (25). The dosing pipe (113) is connected to the dosing component (25); In the center of the reagent temporary storage bin (15), there is a stirring vertical shaft (18) vertically rotatably connected. A plurality of stirring plates (19) are evenly fixedly connected to the periphery of the stirring vertical shaft (18). At the bottom end of the stirring vertical shaft (18), there is a spiral shoveling plate (110) fixedly connected. On the secondary sedimentation tank (3), there is an outlet (31) fixedly connected and communicated. A orthophosphate determination device (32) is fixedly connected to the outlet (31); The stirring structure (16) includes a main shaft (161). The main shaft (161) is horizontally rotatably connected at the middle position of the reagent mixing bin (14). A fixed stirring shaft sleeve (162) is fixedly sleeved at a position of the main shaft (161) away from the driving structure (17). A movable stirring shaft sleeve (163) is rotatably sleeved at a position of the main shaft (161) close to the driving structure (17). A plurality of first main stirring blades (164) are evenly fixedly connected to the periphery of the fixed stirring shaft sleeve (162). A plurality of first shoveling plates (165) are fixedly connected to the ends of the plurality of first main stirring blades (164). A plurality of second main stirring blades (1610) are evenly fixedly connected to the periphery of the movable stirring shaft sleeve (163). A plurality of second shoveling plates (1611) are fixedly connected to the ends of the plurality of second main stirring blades (1610).

2. The sewage treatment device with an intelligent dosing system for phosphorus remover according to claim 1, characterized in that: A plurality of first sub-agitating shafts (166) are horizontally rotatably arranged on the plurality of first main agitating blades (164). The first sub-agitating shafts (166) are rotatably sleeved on the middles of the plurality of first main agitating blades (164) at the same horizontal position. A plurality of first sub-agitating blades (167) are fixedly connected to the positions of the first sub-agitating shafts (166) between the plurality of first main agitating blades (164). A second sub-agitating shaft (1612) is horizontally rotatably arranged on the plurality of second main agitating blades (1610). The second sub-agitating shaft (1612) is rotatably sleeved on the middles of the plurality of second main agitating blades (1610) at the same horizontal position. A plurality of second sub-agitating blades (1613) are fixedly connected to the positions of the second sub-agitating shaft (1612) between the plurality of second main agitating blades (1610).

3. The sewage treatment device with an intelligent dosing system for dephosphorizing agent according to claim 2, characterized in that: A first annular groove (122) is formed at one end of the inside of the chemical agent mixing bin (14) close to the fixed agitating shaft sleeve (162). A second annular groove (124) is formed at one end of the inside of the chemical agent mixing bin (14) close to the movable agitating shaft sleeve (163). A first sealing ring plate (168) is rotatably sleeved on the side wall of the first annular groove (122). The ends of the plurality of first sub-agitating shafts (166) pass through the first sealing ring plate (168) and are fixedly connected to first driven gears (169). The first sub-agitating shafts (166) are rotatably sleeved on the first sealing ring plate (168). A first internal tooth ring (123) is fixedly connected to the side wall of the first annular groove (122). The first internal tooth ring (123) is meshed with the first driven gears (169) on the plurality of first sub-agitating shafts (166). A second sealing ring plate (1614) is rotatably sleeved on the side wall of the second annular groove (124). The second sub-agitating shaft (1612) passes through the second sealing ring plate (1614) and is fixedly connected to a second driven gear (1615). The second sub-agitating shaft (1612) is rotatably sleeved on the second sealing ring plate (1614). A second internal tooth ring (125) is fixedly connected to the side wall of the second annular groove (124). The second internal tooth ring (125) is meshed with the second driven gears (1615) on the plurality of second sub-agitating shafts (1612).

4. The sewage treatment device with an intelligent dosing system for phosphorus remover according to claim 1, characterized in that: Two short shafts (1616) are fixedly connected to both sides of the middle of the main shaft (161). The two short shafts (1616) are located between the fixed agitating shaft sleeve (162) and the movable agitating shaft sleeve (163). The ends of the two short shafts (1616) are fixedly connected to the inner side wall of the sealing bin (1617). The outer rings of two sealing bearings (1621) are fixedly sleeved at both ends of the short shafts (1616). The inner ring of one of the sealing bearings (1621) is fixedly sleeved on the side wall of the end of the fixed agitating shaft sleeve (162), and the inner ring of the other sealing bearing (1621) is fixedly sleeved on the side wall of the end of the movable agitating shaft sleeve (163).

5. The sewage treatment device with an intelligent dosing system for phosphorus removal agent according to claim 4, characterized in that: One end of the fixed stirring shaft sleeve (162) located inside the sealed bin (1617) is fixedly connected with a first bevel gear ring (1619), one end of the movable stirring shaft sleeve (163) located inside the sealed bin (1617) is fixedly connected with a second bevel gear ring (1620), a reversing bevel gear (1618) is rotatably sleeved on each short shaft (1616), and the two sides of the reversing bevel gear (1618) are respectively meshed and connected with the first bevel gear ring (1619) and the second bevel gear ring (1620).

6. The sewage treatment device with an intelligent dosing system for dephosphorizing agent according to claim 1, characterized in that: The chemical adding assembly (25) includes two legs (251), the two legs (251) are located on both sides of the first groove (21), a strip plate (252) is fixedly connected between the tops of the two legs (251), a main pipe body (253) is fixedly connected to the bottom surface of the strip plate (252), a plurality of chemical adding ports (254) are fixedly connected and communicated to the bottom surface of the main pipe body (253), a liquid inlet pipe (255) is fixedly connected and communicated to the end of the main pipe body (253), and a chemical adding pipe (113) is fixedly connected and communicated to the end of the liquid inlet pipe (255).

7. The sewage treatment device with an intelligent dosing system for dephosphorizing agent according to claim 1, characterized in that: The driving structure (17) includes a side bin (171) and a top bin (172). The side bin (171) is fixedly connected to the end of the chemical mixing bin (14). The top bin (172) is fixedly connected to the top side wall of the side bin (171). The bottom surface of the top bin (172) is fixedly connected to the top surface of the chemical temporary storage bin (15). The interior of the top bin (172) is in communication with the interior of the side bin (171). A first driving shaft (173) is horizontally rotatably connected to the side wall of the side bin (171) corresponding to the central position of the chemical mixing bin (14). The end of the first driving shaft (173) is fixedly connected to the end of the main shaft (161). A second driving shaft (174) is vertically rotatably connected to the top bin (172) at the central position of the chemical temporary storage bin (15). The bottom end of the second driving shaft (174) is fixedly connected to the top end of the stirring vertical shaft (18). A driving shaft (175) is vertically rotatably connected inside the side bin (171). A driving bevel gear (176) is fixedly sleeved on the driving shaft (175). A driven bevel gear (177) is fixedly connected to the end of the first driving shaft (173) inside the side bin (171). The driving bevel gear (176) is meshed with the driven bevel gear (177). The diameter of the driving bevel gear (176) is smaller than the diameter of the driven bevel gear (177). A middle rotating shaft (178) is vertically rotatably connected to the top bin (172) at the position between the driving shaft (175) and the second driving shaft (174). A driving pulley (179) is fixedly sleeved on the driving shaft (175). A driven pulley (1710) is fixedly sleeved on the middle rotating shaft (178). A synchronous belt (1711) is sleeved on the driving pulley (179) and the driven pulley (1710). A driving pinion (1712) is fixedly sleeved on the middle rotating shaft (178). A driven gear (1713) is fixedly sleeved on the second driving shaft (174). The driving pinion (1712) is meshed with the driven gear (1713). A driving motor (1714) is fixedly sleeved on the top of the side bin (171). The bottom end of the rotating shaft end of the driving motor (1714) is fixedly connected to the top end of the driving shaft (175).

8. The sewage treatment device with an intelligent dosing system for phosphorus remover according to claim 1, characterized in that: The second groove (22) is fixedly connected to the inner side wall of the first groove (21). The third groove (23) is fixedly connected to the inner side wall of the second groove (22). The central island (24) is fixedly connected to the middle of the third groove (23). A first hole (26) is opened on the outer side wall of the second groove (22). A second hole (27) is opened on the outer side wall of the third groove (23). A drain outlet (29) and a mud return port (210) are fixedly connected and communicated with the outer side wall of the first groove (21). A sewage inlet (28) is fixedly connected to the first groove (21). A plurality of aeration members (211) are fixedly connected to the top surfaces of the first groove (21), the second groove (22) and the third groove (23).

9. The sewage treatment device with an intelligent dosing system for dephosphorizing agent according to claim 8, characterized in that: A water inlet pipe (33) and a sludge pipe (34) are fixedly connected and communicated with the secondary sedimentation tank (3). The water inlet pipe (33) is fixedly connected and communicated with the drain outlet (29). The sludge pipe (34) is fixedly connected and communicated with the mud return port (210).

10. The sewage treatment device with an intelligent dosing system for dephosphorizing agent according to claim 1, characterized in that: Two brackets (121) are fixedly sleeved at both ends of the medicament mixing bin (14), the brackets (121) are fixedly connected to the bottom surface of the box body (11), the top surface of the water tank (12) is fixedly connected and communicated with a metering pump (114), the metering pump (114) is fixedly connected and communicated with a main water pipe (115), the main water pipe (115) is fixedly connected and communicated with a water diversion pipe (116), the water diversion pipe (116) passes through the box body (11), and the end of the water diversion pipe (116) is fixedly connected and communicated with the medicament mixing bin (14). A plurality of powder pumps (117) are fixedly connected and communicated with the ferric salt box (13), each powder pump (117) is fixedly connected and communicated with a powder supply pipe (118), the powder supply pipe (118) passes through the box body (11), and the end of the powder supply pipe (118) is fixedly connected and communicated with the medicament mixing bin (14).

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