Intelligent dephosphorizing and dosing device for sewage treatment

Abstract

The utility model discloses an intelligent dephosphorizing and dosing device for sewage treatment, and belongs to the technical field of water treatment equipment. According to the system, when the flat plate filter membrane needs to be replaced, the replacement operation can be realized by utilizing the device for automatically replacing the flat plate filter membrane, and workers do not need to go to the site, so that the manual maintenance cost is greatly reduced; moreover, the intelligent dephosphorization and dosing system with the device for automatically replacing the flat plate filter membrane is also provided with a special detection area, the flat plate filter membrane does not need to be placed in the whole sewage body during detection, a part of the water body to be detected is introduced into the detection area for detection, and after the detection is completed, the detection efficiency is greatly improved. And then the sewage in the detection area flows back to the sewage body, so that when detection is not needed, the flat plate filter membrane is not located in the sewage any more, the time for growing a biological membrane on the surface of the flat plate filter membrane is greatly shortened, the effective use time of the flat plate filter membrane is prolonged, and the method is of great importance to long-term stable operation of a phosphate instrument.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sewage treatment intelligent phosphorus removal dosing device belongs to water treatment equipment technical field. BACKGROUND

[0002] Phosphorus is one of the main reasons leading to natural water body eutrophication. At present, most of the urban sewage treatment plants in China have implemented the national first level A discharge standard (GB18918-2002), and the requirement for total phosphorus in effluent is relatively strict (TP concentration limit is 0.5mg / L). Some provinces and cities have issued local discharge standards that are more stringent than the first level A standard, reducing the total phosphorus concentration limit in effluent to 0.3 or even 0.2mg / L. In order to achieve deep removal of phosphorus, adding chemical phosphorus removal reagent has become a necessary measure for sewage treatment plants. However, due to the low level of automation control in sewage treatment plants, the dosage of reagent is usually manually adjusted. Considering the large fluctuation of water quality and quantity in sewage treatment plants, the hysteresis of manual adjustment is serious, which can easily lead to the occurrence of effluent exceeding standard. Therefore, in order to achieve deep removal of phosphorus and stable discharge standard, most sewage treatment plants set the dosage according to the highest water quantity and influent phosphorus concentration, and rarely adjust it after setting, which leads to a large amount of waste of reagent. Moreover, the residual metal ions and other substances in the reagent can also cause certain harm to water ecology.

[0003] In order to achieve energy saving and consumption reduction, it is necessary to set up an intelligent phosphorus removal dosing control system. The intelligent phosphorus removal dosing control system can dynamically adjust the dosage according to the change of water quality and quantity, while ensuring stable effluent discharge standard. Considering the timeliness, a phosphate instrument is usually used in the intelligent phosphorus removal dosing system to measure the total phosphorus concentration (its test period is within 5-15min). However, the phosphate instrument needs to ensure the purity of influent as much as possible to achieve accurate detection during detection. The phosphate instrument on the market usually uses a flat filter membrane. When used, the flat filter membrane is set in the water body to be detected to filter out large particles and other impurities in the water body, so that pure water enters the reaction unit of the phosphate instrument.

[0004] Due to the large amount of impurities in sewage, and the rich nutrients such as COD, nitrogen and phosphorus, biofilm is easily grown on the surface of the flat filter membrane, which causes the phosphate instrument to be unable to enter water and thus cannot operate normally. Therefore, the flat filter membrane needs to be cleaned and replaced regularly. At present, most sewage treatment plants use manual cleaning and replacement. Considering that the sewage to be treated is usually located in the suburbs far away from people's living areas, the cleaning and replacement cycle is usually one day, and each cleaning requires 2h of time. However, such a way not only has high labor cost, but also the sewage treatment plant cannot bear such high intensity of instrument operation and maintenance, which can cause the normal use of the intelligent phosphorus removal dosing control system. UTILITY MODEL CONTENTS

[0005] In order to solve the above problems, the utility model provides sewage treatment intelligence dephosphorization dosing device, this device includes phosphate detection device, flat filter membrane automatic replacement device and dosing device,

[0006] Among them, flat filter membrane automatic replacement device includes box 28, the bottom of box 28 is isolated into two areas by isolation plate 27, one side is detection area, one side is placement area,

[0007] The detection area is used to hold the water to be detected, and a plurality of fixed bases 24 and a filter device 29 are arranged inside; the fixed base 24 is used to place the replaced flat filter membrane, and the filter device 29 is used to filter the water to be detected and is communicated with the phosphate detection device, so as to convey the filtered water to the phosphate detection device;

[0008] The placement area is also provided with a plurality of fixed bases 24 for placing a plurality of flat filter membranes 23 to be used; the upper portion of the box 28 is provided with two parallel guide rails 25, and a mechanical hook 21 for grabbing the flat filter membrane is arranged on the guide rail correspondingly; the mechanical hook 21 is used to grab the flat filter membrane for replacement.

[0009] In an embodiment, the filter device 29 includes a clamping groove 30 and a flat filter membrane, and the bottom of the clamping groove 30 is provided with a fixed joint 31 and is connected with a hose 7 leading to the phosphate detection device; the clamping groove 30 is used to fix the flat filter membrane in working state.

[0010] In an embodiment, the detection area is provided with a water inlet pipe 26 and a backflow emptying pipe 20; the other end of the water inlet pipe 26 is communicated with a sewage pool, and a diaphragm pump 17 is used to pump the sewage in the sewage pool into the detection area; the backflow emptying pipe 20 is arranged at a predetermined height of the side wall of the detection area to prevent the sewage in the detection area from overflowing; the bottom of the detection area is provided with a drain pipe, and an electromagnetic valve 19 for controlling the on-off of the drain pipe is arranged on the drain pipe.

[0011] In an embodiment, the box 28 is a semi-open structure.

[0012] In an embodiment, the phosphate detection device includes a PLC controller 3, a phosphate detection unit 5, a reaction unit 6, a low-temperature storage area 9 for placing reagents 10 and a waste liquid barrel 14.

[0013] The other end of the hose 7 is connected with the reaction unit 6, so that the sewage filtered by the filtering device 29 is pumped into the reaction unit 6 by the first peristaltic pump 15, the medicament 10 is also pumped into the reaction unit 6 by the second peristaltic pump 8, then the corresponding phosphate value is detected by the phosphate detection unit 5, the phosphate detection unit 5 feeds back the detected phosphate value to the PLC controller 3, and the PLC controller 3 determines the corresponding dosing parameter according to the corresponding phosphate value and feeds back to the dosing unit to perform the dosing operation.

[0014] In an embodiment, the flat plate filter membrane automatic replacement device further comprises a servo motor 22, a servo driver 4 and a diaphragm pump 17, the servo motor 22 is used for controlling the mechanical claw 21, the servo motor 22 is electrically connected with the servo driver 4, and then the position of the mechanical claw 21 is changed through parallel guide rails.

[0015] In an embodiment, the flat plate filter membrane automatic replacement device further comprises a diaphragm pump 17, the diaphragm pump 17 is used for pumping the sewage in the sewage pool into the detection area.

[0016] In an embodiment, the servo driver 4, the diaphragm pump 17 and the electromagnetic valve 19 in the flat plate filter membrane automatic replacement device are electrically connected with the PLC controller 3; the first peristaltic pump 15 and the second peristaltic pump 8 in the phosphate detection device are electrically connected with the PLC controller 3.

[0017] The flat plate filter membrane automatic replacement device has the following advantages:

[0018] The intelligent phosphorus removal and dosing device has the functions of flat plate filter membrane automatic replacement, and when the flat plate filter membrane needs to be replaced, the replacement operation can be realized by using the device for automatically replacing the flat plate filter membrane, workers do not need to go to the scene, manual maintenance cost is greatly reduced, and the intelligent phosphorus removal and dosing system provided by the application further has a special detection area, when detection is performed, the flat plate filter membrane does not need to be placed in the entire sewage body, but a part of the water body to be detected is introduced into the detection area for detection, and after detection is completed, the sewage in the detection area is returned to the sewage body, so that when detection is not performed, the flat plate filter membrane is not in the sewage, and the growth time of the biofilm on the surface of the flat plate filter membrane is greatly reduced, the effective use time of the flat plate filter membrane is prolonged, and long-term stable operation of the phosphate instrument is very important. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of an intelligent phosphorus removal and dosing system with a flat plate filter membrane automatic replacement device;

[0020] Figure 2 It is a schematic view of a flat plate filter membrane and a fixed interface;

[0021] Figure 3 A membrane filtration device for existing phosphate meters;

[0022] The components include: 1. Cabinet; 2. Frequency converter; 3. PLC controller; 4. Servo driver *3; 5. Phosphate detection unit; 6. Reaction unit; 7. Hoses; 8. Second peristaltic pump 1; 9. Low-temperature storage area; 10. Reagent; 11. Display; 12. Network cable; 13. Cable; 14. Waste liquid tank; 15. First peristaltic pump 2; 16. First shielded cable; 17. Diaphragm pump; 18. Second shielded cable; 19. Solenoid valve; 20. Return drain pipe; 21. Mechanical claw; 22. Servo motor; 23. Flat plate filter membrane; 24. Fixed base; 25. Guide rail; 26. Water inlet pipe; 27. Isolation plate; 28. Box; 29. ​​Filter device; 30. Slot; 31. Fixed joint; 32. Rubber pad; 33. Stainless steel bracket; 34. Fixed plate; 35. Fixed nut; 36. Hoses connector. Detailed Implementation

[0023] The following is a detailed description of this utility model.

[0024] Example 1

[0025] This embodiment provides an intelligent phosphorus removal dosing device for wastewater treatment, including: a phosphate detection device, an automatic flat-plate filter membrane replacement device, and a dosing device.

[0026] like Figure 1 As shown, the automatic flat-plate filter membrane replacement device includes a housing 28, which has a semi-open structure. The bottom of the housing 28 is divided into two areas by a partition plate 27: one side is a testing area, and the other side is a placement area. The testing area is used to hold the water to be tested and contains multiple fixed bases 24 and a filter device 29. The fixed bases 24 are used to place the replaced flat-plate filter membranes, such as… Figure 2 As shown, the filtration device 29 includes a slot 30 and a flat plate filter membrane. A fixing connector 31 is provided at the bottom of the slot 30, and a rubber pad 32 is also adaptively provided. The fixing connector 31 is connected to a flexible hose 7 leading to the phosphate detection device. The slot 30 is used to fix the flat plate filter membrane in operation. The detection area is provided with an inlet pipe 26 and a return drain pipe 20. The other end of the inlet pipe 26 is connected to a sewage tank. Sewage from the sewage tank is pumped into the detection area by a diaphragm pump 17. To prevent sewage overflow from the detection area, a return drain pipe 20 is provided at a certain height on the side wall of the detection area. The other end of the return drain pipe 20 is connected to the sewage tank. Simultaneously, to facilitate the drainage of sewage from the detection area after detection, the bottom of the detection area is also connected to the sewage tank via a drain pipe, and a solenoid valve 19 for controlling the flow of water is provided on the drain pipe.

[0027] The placing area is also provided with a plurality of fixed bases for placing a plurality of flat filter membranes 23 to be used; the upper portion of the box 28 is provided with two parallel guide rails 25, and the guide rails are correspondingly provided with mechanical claws 21 for grabbing the flat filter membranes; the mechanical claws 21 are controlled by a servo motor 22, and the servo motor 22 is electrically connected with the servo driver 4, so as to realize the change of the position of the mechanical claws 21 through the parallel guide rails.

[0028] It should be noted that the servo driver 4 can be provided with a plurality of servo drivers for controlling the upward and downward movement and the horizontal movement of the mechanical claws, and the present application does not limit this.

[0029] As shown in Figure 3 , it is the structure of the existing membrane filter device of the phosphate instrument, which comprises a stainless steel support 33 and a fixed plate 34; the stainless steel support 33 is a reverse T-shaped structure, and the flat filter membrane 23 is fixed at the bottom of the stainless steel support 33 through a fixed nut 35; the bottom of the flat filter membrane 23 is provided with a soft pipe connector 36 connected with the soft pipe 7; in actual use, a fixed plate 34 is arranged in the sewage pool, and a worker responsible for replacing the flat filter membrane manually takes down the flat filter membrane from the fixed plate 34 in the sewage pool, twists the fixed nut 35 to take down the flat filter membrane 23, replaces the new flat filter membrane, and then fixes it to the fixed plate 34; it is relatively cumbersome, and the present application re-designs the filter device as shown in Figure 2 .

[0030] As shown in Figure 1 , the phosphate detection device comprises a PLC controller 3, a phosphate detection unit 5, a reaction unit 6, a medicament 10, a low-temperature storage area 9 for placing the medicament, and a waste liquid tank 14; the other end of the soft pipe 7 connected with the bottom of the filter device 29 of the flat filter membrane automatic replacement device is connected with the reaction unit 6; the sewage filtered by the filter device 29 is pumped into the reaction unit 6 through a first peristaltic pump 15, and the medicament 10 is also pumped into the reaction unit 6 through a second peristaltic pump 8, so as to detect the corresponding phosphate value through the phosphate detection unit 5; the phosphate detection unit 5 feeds back the detected phosphate value to the PLC controller 3, and the PLC controller 3 determines the corresponding dosing parameter according to the corresponding phosphate value, and feeds back the dosing parameter to the dosing unit to perform the dosing operation; the reacted sewage flows into the waste liquid tank 14.

[0031] It should be noted that the dosing unit only needs to perform the dosing operation according to the dosing parameter determined by the PLC controller 3, and the present application does not improve the dosing unit, and the existing dosing device can be used to realize this, which will not be described here.

[0032] As shown in Figure 1As shown, the servo driver 4, the diaphragm pump 17 and the electromagnetic valve 19 in the flat filter automatic replacement device are electrically connected with the PLC controller 3 (for the sake of simplicity, the connecting line between the electromagnetic valve 19 and the PLC controller 3 is not shown in the figure), wherein the diaphragm pump 17 is connected with the frequency converter 2 through the cable 13, and the frequency converter 2 is connected with the PLC controller 3; the first peristaltic pump 15 and the second peristaltic pump 8 in the phosphate detection device are electrically connected with the PLC controller 3 (for the sake of simplicity, the connecting line is not shown in the figure), and the phosphate detection device is further provided with the display 11, the phosphate detection unit 5 and the display 11 are electrically connected with the PLC controller 3 through the first shielding line 16 and the second shielding line 18 respectively.

[0033] The sewage treatment intelligent dephosphorization dosing device provided by the application realizes long-time continuous and stable operation by replacing the flat filter membrane in a timely manner, the PLC controller 3 realizes the replacement operation of the flat filter membrane by setting corresponding time parameters, and the opening and closing of the diaphragm pump 17 and the on-off of the electromagnetic valve 19 are controlled by setting corresponding time parameters when the sewage in the detection area is pumped in and discharged.

[0034] The mechanical claw 21 is controlled by the servo motor 22 to realize the grabbing of the flat filter membrane and the positioning of the corresponding position, which can refer to the control process of the existing mechanical hand, and the specific control method will not be described herein.

[0035] Working principle of the utility model:

[0036] When the device is started, the phosphate detection unit stops running, the diaphragm pump 17 stops water inlet, the electromagnetic valve 19 opens water outlet, starts water discharge timing, and after the water discharge timing is finished, the servo motor 22 controls the mechanical claw 21 to grab the flat filter membrane being used and place it at the empty fixed base of the old flat filter membrane in the right detection area, the flat filter membrane is fixed in place and the mechanical claw 21 is loosened, the servo motor 22 continues to drive the claw 21 to the standby flat filter membrane in the left placement area, grabs the standby flat filter membrane and places it in the clamping groove 30 of the filter device 29 in the middle, the mechanical claw 21 rises after the standby flat filter membrane is fixed, the electromagnetic valve 19 is closed, the diaphragm pump 17 is started, water inlet timing is started, and the phosphate detection unit starts running after the water inlet timing is finished.

[0037] When the device is running, first, the phosphate detection unit stops running, then the diaphragm pump 17 stops running, the electromagnetic valve 19 is opened, the flat filter membrane use time in the PLC is cleared, the drainage timing program starts timing, the water in the detection area flows into the sewage pool through the electromagnetic valve 19, when the PLC timing reaches, the servo driver 4 drives the servo motor 22 to control the two mechanical claws 21 to descend to the fixed position, the current used flat filter membrane is grabbed, after the flat filter membrane is grabbed, the servo driver drives the mechanical claws 21 to ascend to the fixed position, then the servo driver 4 drives the servo motor to make the mechanical claws 21 move to the emptying backflow pipe direction, and the mechanical claws 21 are released after the flat filter membrane is placed in the fixed base 24, and the mechanical claws 21 are released and ascend, at the same time, the PLC counting program is started, the flat filter membrane replacement times are added by 1, the mechanical claws 21 ascend to the position and then move to the left, after moving to the corresponding position, the servo driver 4 drives the servo motor 22 to control the mechanical claws to grab the standby flat filter membrane downwards, after the flat filter membrane is grabbed, the mechanical claws are released and ascend to the fixed position, the electromagnetic valve 19 is closed, the diaphragm pump is started, water starts to flow in, the water inflow time in the PLC starts timing, when the water inflow timing time reaches, the phosphate detection unit starts running, and the flat filter membrane use time starts timing.

[0038] The intelligent phosphorus removal and dosing device can continuously and stably run for at least hundreds of days in various different complex water qualities by using the timing program and the counting program of the PLC controller, and manual operation is not required during the period, and all actions are completed by the self-control system setting, as long as the addition of standby flat filter membranes and the collection of old flat filter membranes are ensured, the long-term stable running of the phosphate instrument can be ensured. The device can exclude external factor interference of the phosphate instrument result, reduce the maintenance workload of personnel, and reduce the running cost of the whole phosphate intelligent dosing system.

[0039] Although the utility model has disclosed as above with preferable embodiments, it is not used to limit the utility model, anyone familiar with the technology can make various changes and modifications without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be limited by the claims.

Claims

1. A sewage treatment intelligent phosphorus removal dosing device, characterized in that, The device comprises a phosphate detection device, a flat membrane automatic replacement device and a dosing device; The flat membrane automatic replacement device comprises a box (28), the inside bottom of the box (28) is separated into two areas by a partition plate (27), one side is a detection area and the other side is a placement area; The detection area is used for containing water to be detected, and is internally provided with a plurality of fixing bases (24) and a filtering device (29); the fixing bases (24) are used for placing the replaced flat membranes, and the filtering device (29) is used for filtering the water to be detected and is communicated with the phosphate detection device, so as to convey the filtered water to the phosphate detection device; The placement area is also provided with a plurality of fixing bases (24) and is used for placing a plurality of flat membranes (23) to be used; the upper part of the box (28) is provided with two parallel guide rails (25), and the guide rails are correspondingly provided with mechanical claws (21) for grabbing the flat membranes; the mechanical claws (21) are used for grabbing the flat membranes for replacement.

2. The intelligent phosphorus removal dosing device for sewage treatment according to claim 1, characterized in that, The filtering device (29) comprises a clamping groove (30) and a flat membrane; the bottom of the clamping groove (30) is provided with a fixing connector (31) and is connected with a hose (7) leading to the phosphate detection device; the clamping groove (30) is used for fixing the flat membrane in a working state.

3. The intelligent phosphorus removal dosing device for sewage treatment according to claim 2, characterized in that, The detection area is provided with a water inlet pipe (26) and a backflow emptying pipe (20); the other end of the water inlet pipe (26) is communicated with a sewage pool, and a diaphragm pump (17) is used for pumping the sewage in the sewage pool into the detection area; the backflow emptying pipe (20) is arranged at a predetermined height of the side wall of the detection area, so as to prevent the sewage in the detection area from overflowing; the bottom of the detection area is provided with a drain pipe, and the drain pipe is provided with an electromagnetic valve (19) for controlling the on-off of the drain pipe.

4. The intelligent phosphorus removal dosing device for sewage treatment according to claim 3, characterized in that, The box (28) is a semi-open structure.

5. The intelligent phosphorus removal dosing device for sewage treatment of claim 4, characterized in that, The phosphate detection device comprises a PLC controller (3), a phosphate detection unit (5), a reaction unit (6), a low-temperature storage area (9) for placing reagents (10) and a waste liquid barrel (14); The other end of the hose (7) is connected with the reaction unit (6), so that the filtered sewage of the filtering device (29) is pumped into the reaction unit (6) through a first peristaltic pump (15), the reagents (10) are also pumped into the reaction unit (6) through a second peristaltic pump (8), and then the corresponding phosphate value is detected through the phosphate detection unit (5); the detected phosphate value is fed back to the PLC controller (3), the PLC controller (3) determines the corresponding dosing parameters according to the corresponding phosphate value, and feeds back the dosing parameters to the dosing unit to perform the dosing operation.

6. The intelligent phosphorus removal dosing device for sewage treatment of claim 5, characterized in that, The flat membrane automatic replacement device further comprises a servo motor (22), a servo driver (4) and a diaphragm pump (17); the servo motor (22) is used for controlling the mechanical claws (21); the servo motor (22) is electrically connected with the servo driver (4), and the position of the mechanical claws (21) is changed through the parallel guide rails.

7. The intelligent phosphorus removal dosing device for sewage treatment of claim 6, characterized in that, The flat membrane automatic replacement device further comprises a diaphragm pump (17); the diaphragm pump (17) is used for pumping the sewage in the sewage pool into the detection area.

8. The intelligent phosphorus removal dosing device for sewage treatment of claim 7, characterized in that, The servo driver (4), the diaphragm pump (17) and the electromagnetic valve (19) in the flat plate filter automatic replacement device are electrically connected with the PLC controller (3); the first peristaltic pump (15) and the second peristaltic pump (8) in the phosphate detection device are electrically connected with the PLC controller (3).

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