Potassium permanganate dosing device for water supply plant
By designing two sets of potassium permanganate dosing channels and an automatic potassium permanganate dosing device with an electrical control system, the problem of inaccurate potassium permanganate dosing in water supply plants was solved. This achieved precise potassium permanganate dosing and water quality stability, reduced the need for human resources, and ensured continuous dosing and remote monitoring and management.
Patent Information
- Application Number
- CN202520489290.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-13
AI Technical Summary
The potassium permanganate dosing system in the water supply plant cannot achieve precise dosing, leading to problems such as excessive manganese residue or water discoloration.
An automatic potassium permanganate dosing device was designed, which includes two sets of potassium permanganate dosing channels and an electrical control system. It uses a PLC controller and a fiber optic switch to achieve precise dosing, supports both manual and automatic control modes, and monitors the dosing through level gauges and flow meters to ensure the stability and safety of the dosing.
It enables precise dosing of potassium permanganate, ensuring the stability of the water quality leaving the plant, reducing the need for human resources, ensuring continuous dosing and remote monitoring and management, and improving the reliability and efficiency of water treatment.
Smart Images
Figure CN223895735U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water treatment technology, specifically to a potassium permanganate dosing device used in water supply plants (also known as tap water plants). Background Technology
[0002] In the field of tap water treatment, the prevalent iron and manganese ions, organic pollutants, and disinfection-resistant microorganisms in water sources pose a severe challenge to water quality safety. Traditional processes such as simple coagulation and sedimentation and chlorine disinfection have significant limitations: iron and manganese ions are difficult to remove completely, easily depositing in the pipe network and causing "red water" and "black water" problems; natural organic matter such as humic acid reacts with chlorine to produce carcinogenic disinfection byproducts such as trihalomethanes; and chlorine-resistant pathogens such as Cryptosporidium can easily break through conventional disinfection barriers. To address these challenges, potassium permanganate (KMnO4) has gradually become a core oxidant in water treatment plants since the late 20th century. Its technical principle is based on strong oxidizing properties and multi-effect synergistic effects. Under conventional treatment conditions of pH 6-8, potassium permanganate removes dissolved Fe through electron transfer. 2+ Mn 2+ Oxidation produces Fe(OH)3 and MnO2 precipitates, which, when combined with filtration, can stably keep the manganese concentration in the effluent below 0.02 mg / L (stricter than the national standard GB5749-2022 limit of 0.1 mg / L), fundamentally eliminating secondary pollution of the pipe network caused by metal ions. Simultaneously, its oxidizing ability on organic matter can specifically degrade pesticide residues, drug components, and odor-causing substances such as geosmin. After destroying the humic acid structure, the risk of trihalomethane formation during subsequent chlorination is reduced by 35%-50%. The generated MnO2 colloids can also neutralize the charge with aluminum salt coagulants, increasing floc size by 15%-20% and improving turbidity removal rate by over 12%. Regarding microbial risks, potassium permanganate can penetrate the protein shell of Cryptosporidium oocysts, significantly improving the inactivation efficiency of chlorination. Engineering data shows that its combined use with chlorination can increase the Cryptosporidium inactivation rate from 1-log to 4-log. In practical applications, a dosage of 0.5-1.2 mg / L (referencing industry standard CJJ58-2021) can rapidly degrade sudden pollutants, such as reducing the concentration of aniline leaks from 1.2 mg / L to below 0.05 mg / L within 15 minutes. Simultaneously, it inhibits biofilm formation in the pipe network, keeping assimilated organic carbon (AOC) below the microbial regeneration threshold of 50 μg / L. Current technological focus is on precise dosage control; excessive dosage can lead to excessive manganese residues or water discoloration. Novel composite agents (such as loaded nano-iron oxides) can increase the reaction rate by 2-3 times and reduce byproduct residues. This technology has been incorporated into several water supply technical specifications in my country, becoming a standardized solution for addressing complex water quality problems. Its economic efficiency and effectiveness have been fully verified in decades of engineering practice. Summary of the Invention
[0003] The purpose of this invention is to solve the technical problem that the potassium permanganate dosing system in water supply plants cannot accurately add potassium permanganate, and to provide an automatic potassium permanganate dosing device to achieve accurate dosing of tap water.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A potassium permanganate dosing device for a water supply plant includes a first potassium permanganate storage tank, a second potassium permanganate storage tank, a first manual ball valve, a first electric ball valve, a second manual ball valve, a third manual ball valve, a second electric ball valve, a fourth manual ball valve, a first metering pump, a first frequency converter, a second metering pump, and a second frequency converter. The first manual ball valve is installed on the outlet pipe at the bottom of the second potassium permanganate storage tank. The inlet of the first metering pump is connected to the outlet pipe at the bottom of the second potassium permanganate storage tank via the first manual ball valve, the first electric ball valve, and the second manual ball valve. The third manual ball valve is installed on the outlet pipe at the bottom of the first potassium permanganate storage tank. The inlet of the second metering pump is connected to the bottom of the first potassium permanganate storage tank. The outlet pipelines of the unit are connected via a third manual ball valve, a second electric ball valve, and a fourth manual ball valve; the first frequency converter is connected to the first metering pump for frequency conversion control of the first metering pump; the second frequency converter is connected to the second metering pump for frequency conversion control of the second metering pump; the outlet of the first metering pump is connected to the first exhaust valve; the outlet of the second metering pump is connected to the second exhaust valve; the first potassium permanganate storage tank is equipped with a first level gauge for monitoring the potassium permanganate level in the tank; the first potassium permanganate storage tank is equipped with a first agitator, which is controlled by a PLC controller to periodically agitate the potassium permanganate in the tank. The second potassium permanganate storage tank is equipped with a second level gauge for monitoring the potassium permanganate level in the tank; the second potassium permanganate storage tank is also equipped with a second agitator, which is controlled by a PLC controller to periodically agitate the potassium permanganate in the tank.
[0006] Furthermore, the system includes an electrical control system to precisely control the overall dosing of potassium permanganate. This electrical control system is implemented through a PLC controller. The PLC control system is connected to the electromagnetic flow meter, the first metering pump, the first frequency converter, the first electric ball valve, the third electric ball valve, the second metering pump, the second frequency converter, the second electric ball valve, the fourth electric ball valve, the touch screen, the first level gauge, the second level gauge, and the inlet water flow meter of the water supply plant, etc., to achieve automatic control.
[0007] Furthermore, the potassium permanganate dosing device employs both manual and automatic control modes on-site. System operating parameters can be adjusted and set via the touchscreen of the electrical control system.
[0008] Furthermore, it includes two potassium permanganate dosing channels. The first potassium permanganate dosing channel consists of a first manual ball valve, a first electric ball valve, a second manual ball valve, a first metering pump, a first check valve, a third electric ball valve, a first Y-type filter, a back pressure valve, and an electromagnetic flow meter, all connected sequentially to the outlet pipe at the bottom of the second potassium permanganate storage tank. Potassium permanganate is added to the raw water pipe after passing through the electromagnetic flow meter. The first electric ball valve, the first metering pump, the first frequency converter, and the third electric ball valve are controlled by a PLC controller. A second level gauge monitors the potassium permanganate level in the second potassium permanganate storage tank. When this potassium permanganate dosing channel is used, and the potassium permanganate level in the second potassium permanganate storage tank is within the normal range, the PLC controller opens the first and third electric ball valves and controls the operation of the first metering pump and the first frequency converter. Manual ball valves No. 1 and No. 2 are normally open. When the potassium permanganate dosing channel is undergoing troubleshooting, manual ball valves No. 1 and No. 2 are closed for troubleshooting.
[0009] The second potassium permanganate dosing channel includes a third manual ball valve, a second electric ball valve, a fourth manual ball valve, a second metering pump, a second check valve, a fourth electric ball valve, a second Y-type filter, a back pressure valve, and an electromagnetic flow meter, all connected sequentially to the outlet pipe at the bottom of the first potassium permanganate storage tank. Potassium permanganate is added to the raw water pipe after passing through the electromagnetic flow meter. The second electric ball valve, the second metering pump, the second frequency converter, and the fourth electric ball valve are controlled by a PLC controller. The first level gauge monitors the potassium permanganate level in the first potassium permanganate storage tank. When this potassium permanganate dosing channel is used, and the potassium permanganate level in the first potassium permanganate storage tank is within the normal range, the PLC controller opens the second and fourth electric ball valves and controls the second metering pump and the second frequency converter. Manual ball valves No. 3 and No. 4 are normally open. When the potassium permanganate dosing channel is undergoing troubleshooting, manual ball valves No. 3 and No. 4 are closed for troubleshooting.
[0010] Furthermore, the two potassium permanganate dosing channels are configured with one in use and one in standby mode to avoid affecting potassium permanganate dosing in the event of a malfunction in the metering pump or the corresponding channel, thus achieving continuous dosing.
[0011] Furthermore, the system includes a first level gauge for monitoring the potassium permanganate level in the first potassium permanganate storage tank. When the potassium permanganate level in the first potassium permanganate storage tank falls below the set normal value, it is replenished in a timely manner to prevent the potassium permanganate level from being too low and affecting the normal addition of potassium permanganate.
[0012] Furthermore, a second level gauge is used to monitor the potassium permanganate level in the second potassium permanganate storage tank. When the potassium permanganate level in the second potassium permanganate storage tank is lower than the set normal value, it is replenished in time to avoid the potassium permanganate being too low and affecting the normal addition of potassium permanganate.
[0013] Furthermore, this includes connecting a fiber optic switch to a PLC controller, which in turn connects to a monitoring workstation. The monitoring workstation is used for remote monitoring and data management of the potassium permanganate dosing process and can control the PLC controller. The monitoring workstation enables remote monitoring and management of the potassium permanganate dosing process.
[0014] Compared with the prior art, the features of this utility model are:
[0015] 1. Compared with the existing potassium permanganate dosing in water supply plants, this device is more stable, ensuring that the water quality leaving the water supply plant is within a stable range.
[0016] 2. This device adopts both manual and automatic control modes on-site. On-site, system operating parameters can be adjusted and set via the touchscreen of the electrical control system.
[0017] 3. The PLC controller in the electrical control system of this device is connected to a fiber optic switch, which in turn is connected to a monitoring workstation. The monitoring workstation is used for remote monitoring and data management of the potassium permanganate dosing process and can control the PLC controller. The monitoring workstation enables remote monitoring and management of the potassium permanganate dosing process, eliminating the need for on-site inspection personnel, saving manpower, and effectively ensuring the normal and reliable operation of the potassium permanganate dosing process.
[0018] 4. The two potassium permanganate dosing channels in this device are operated in a one-in-use and one-in-standby mode to avoid affecting the potassium permanganate dosing when the metering pump or the corresponding channel fails, so as to achieve continuous dosing.
[0019] 5. This device monitors the inflow rate of the water supply plant using a flow meter, calculates the theoretical dosage Q proportionally, and controls the dosage of the first and second metering pumps via a PLC controller using the first and second frequency converters. The dosage is monitored in real time by an electromagnetic flow meter.
[0020] 6. This system can ensure the stability and safety of potassium permanganate dosing. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the components of this utility model.
[0022] Figure 2 PLC adjustment diagram
[0023] In the diagram: 1. Potassium permanganate storage tank No. 1; 2. Potassium permanganate storage tank No. 2; 3. Mixer No. 2; 4. Mixer No. 1; 5. Inlet water flow meter of the water supply plant; 6. Manual ball valve No. 1; 7. Electric ball valve No. 1; 8. Manual ball valve No. 2; 9. Manual ball valve No. 3; 10. Electric ball valve No. 2; 11. Manual ball valve No. 4; 12. Air vent valve No. 1; 13. Check valve No. 1; 14. Electric ball valve No. 3; 15. Y-type filter No. 1 ; 16. Second exhaust valve; 17. Second check valve; 18. Fourth electric ball valve; 19. Second Y-type filter; 20. First metering pump; 21. First frequency converter; 22. Second metering pump; 23. Second frequency converter; 24. Back pressure valve; 25. Electromagnetic flow meter; 26. Electrical control system; 27. Touch screen; 28. PLC controller; 29. Fiber optic switch; 30. Monitoring workstation; 31. Second level gauge; 32. First level gauge. Detailed Implementation
[0024] The present invention will be further explained below with reference to specific examples.
[0025] See appendix Figure 1This utility model includes a first potassium permanganate storage tank 1, a second potassium permanganate storage tank 2, a first manual ball valve 6, a first electric ball valve 7, a second manual ball valve 8, a third manual ball valve 9, a second electric ball valve 10, a fourth manual ball valve 11, a first metering pump 20, a first frequency converter 21, a second metering pump 22, and a second frequency converter 23. The first manual ball valve 6 is installed on the outlet pipe at the bottom of the second potassium permanganate storage tank 2. The inlet of the first metering pump 20 is connected to the outlet pipe at the bottom of the second potassium permanganate storage tank 2 via the first manual ball valve 6, the first electric ball valve 7, and the second manual ball valve 8. The third manual ball valve 9 is installed on the outlet pipe at the bottom of the first potassium permanganate storage tank 1. The inlet of the second metering pump 22 is connected to the outlet pipe at the bottom of the first potassium permanganate storage tank 1. The system is connected via a third manual ball valve 9, a second electric ball valve 10, and a fourth manual ball valve 11. The first frequency converter 21 is connected to the first metering pump 20 for frequency conversion control. The second frequency converter 23 is connected to the second metering pump 22 for frequency conversion control. The outlet of the first metering pump 20 is connected to the first exhaust valve 12. The outlet of the second metering pump 22 is connected to the second exhaust valve 16. The first potassium permanganate storage tank 1 is equipped with a first level gauge 32 for monitoring the potassium permanganate level. The first potassium permanganate storage tank 1 is equipped with a first agitator 4, which is controlled by a PLC controller 28 to periodically agitate the potassium permanganate in the tank. The second potassium permanganate storage tank 2 is equipped with a second level gauge 31 for monitoring the potassium permanganate liquid level in the second potassium permanganate storage tank 2; the second potassium permanganate storage tank 2 is equipped with a second agitator 3, which is controlled by a PLC controller 28 to agitate the potassium permanganate in the second potassium permanganate storage tank 2 at regular intervals.
[0026] As described above, this utility model includes two potassium permanganate dosing channels. The first potassium permanganate dosing channel comprises a first manual ball valve 6, a first electric ball valve 7, a second manual ball valve 8, a first metering pump 20, a first check valve 13, a third electric ball valve 14, a first Y-type filter 15, a back pressure valve 24, and an electromagnetic flowmeter 25, all connected sequentially to the outlet pipe at the bottom of the second potassium permanganate storage tank 2. Potassium permanganate is added to the raw water pipe after passing through the electromagnetic flowmeter 25. The operation of the first electric ball valve 7, the first metering pump 20, the first frequency converter 21, and the third electric ball valve 14 is controlled by the PLC controller 28. The second level gauge 31 monitors the potassium permanganate level in the second potassium permanganate storage tank 2. When this potassium permanganate dosing channel is used, and the potassium permanganate level in the second potassium permanganate storage tank 2 is within the normal range, the PLC controller 28 controls the opening of the first electric ball valve 7 and the third electric ball valve 14, and controls the operation of the first metering pump 20 and the first frequency converter 21. The first manual ball valve 6 and the second manual ball valve 8 are normally open. When this potassium permanganate dosing channel is undergoing fault repair, the first manual ball valve 6 and the second manual ball valve 8 are closed for fault repair.
[0027] The second potassium permanganate dosing channel includes a third manual ball valve 9, a second electric ball valve 10, a fourth manual ball valve 11, a second metering pump 22, a second check valve 17, a fourth electric ball valve 18, a second Y-type filter 19, a back pressure valve 24, and an electromagnetic flowmeter 25, all connected sequentially to the outlet pipe at the bottom of the first potassium permanganate storage tank 1. Potassium permanganate is added to the raw water pipe after passing through the electromagnetic flowmeter 25. Among them, the second electric ball valve 10, the second metering pump 22, the second frequency converter 23, and the fourth electric ball valve 18 are controlled by the PLC controller 28; the first level gauge 32 monitors the potassium permanganate level in the first potassium permanganate storage tank 1; when using this potassium permanganate dosing channel, and the potassium permanganate level in the first potassium permanganate storage tank 1 is within the normal range, the PLC controller 28 controls the second electric ball valve 10 and the fourth electric ball valve 18 to open, and controls the second metering pump 22 and the second frequency converter 23 to operate. The third manual ball valve 9 and the fourth manual ball valve 11 are normally open. When this potassium permanganate dosing channel is undergoing fault repair, the third manual ball valve 9 and the fourth manual ball valve 11 are closed for fault repair.
[0028] In this invention, the two potassium permanganate dosing channels are used in a one-in-one-backup manner to achieve continuous dosing, thus avoiding the impact on potassium permanganate dosing when the metering pump and corresponding channels malfunction.
[0029] In this utility model, the first potassium permanganate storage tank 1 is equipped with a first level gauge 32, which is used to monitor the potassium permanganate liquid level in the first potassium permanganate storage tank 1. When the potassium permanganate liquid level in the first potassium permanganate storage tank 1 is lower than the set normal value, it is replenished in time to avoid the potassium permanganate liquid level being too low and affecting the normal addition of potassium permanganate.
[0030] In this invention, the second potassium permanganate storage tank 2 is equipped with a second level gauge 31, which is used to monitor the potassium permanganate level in the second potassium permanganate storage tank 2. When the potassium permanganate level in the second potassium permanganate storage tank 2 is lower than the set normal value, it is replenished in time to avoid the potassium permanganate being too low and affecting the normal addition of potassium permanganate.
[0031] This utility model includes an electrical control system 26 to achieve precise control of the entire potassium permanganate dosing device. This electrical control system 26 is implemented through a PLC controller 28. See also the attached document. Figure 2 The PLC control system is connected to the electromagnetic flow meter 25, the first metering pump 20, the first frequency converter 21, the first electric ball valve 7, the third electric ball valve 14, the second metering pump 22, the second frequency converter 23, the second electric ball valve 10, the fourth electric ball valve 18, the touch screen 27, the first level gauge 32, the second level gauge 31, and the water inlet flow meter 5 of the water supply plant, etc., to realize automatic control.
[0032] The potassium permanganate dosing device of this invention adopts both manual and automatic control modes on site. On site, the system operating parameters can be adjusted and set via the touch screen 27 of the electrical control system 26.
[0033] In this invention, the PLC controller 28 is connected to the fiber optic switch 29, which in turn is connected to the monitoring workstation 30. The monitoring workstation 30 is used for remote monitoring and data management of the potassium permanganate dosing process and can control the PLC controller 28. Through the monitoring workstation 30, remote monitoring and management of the potassium permanganate dosing process can be achieved, eliminating the need for on-site inspection personnel, saving manpower, and effectively ensuring the normal and reliable operation of the potassium permanganate dosing process.
[0034] This utility model's potassium permanganate dosing device is equipped with two metering pumps to achieve automatic start / stop control, one in operation and one on standby, ensuring uninterrupted potassium permanganate dosing. Simultaneously, this utility model can also manually add potassium permanganate, employing both manual and automatic control modes on-site. On-site, system operating parameters can be adjusted via the touchscreen 27 of the electrical control system 26.
[0035] In this invention, the inlet water flow rate of the water supply plant is monitored by a flow meter 5, and the theoretical dosage Q is calculated proportionally. The dosage is then controlled by a PLC controller 28, which controls the first frequency converter 21 and the second frequency converter 23 to control the first metering pump 20 and the second metering pump 22. The dosage is monitored in real time by an electromagnetic flow meter 25.
[0036] This system can ensure the stability and safety of potassium permanganate dosing.
Claims
1. A potassium permanganate dosing device for water supply plants, characterized in that: The system includes a first potassium permanganate storage tank (1), a second potassium permanganate storage tank (2), a first manual ball valve (6), a first electric ball valve (7), a second manual ball valve (8), a third manual ball valve (9), a second electric ball valve (10), a fourth manual ball valve (11), a first metering pump (20), a first frequency converter (21), a second metering pump (22), and a second frequency converter (23). The first manual ball valve (6) is installed on the outlet pipeline at the bottom of the second potassium permanganate storage tank (2). The inlet of the first metering pump (20) is connected to the outlet pipeline of the second potassium permanganate storage tank (2). The outlet pipes at the bottom of the potassium permanganate storage tank (2) are connected by a first manual ball valve (6), a first electric ball valve (7), and a second manual ball valve (8); the third manual ball valve (9) is installed on the outlet pipe at the bottom of the first potassium permanganate storage tank (1); the inlet of the second metering pump (22) is connected to the outlet pipe at the bottom of the first potassium permanganate storage tank (1) by a third manual ball valve (9), a second electric ball valve (10), and a fourth manual ball valve (11); the first frequency converter (21) is connected to the first metering pump (20) and uses... The first metering pump (20) is controlled by a frequency converter; the second frequency converter (23) is connected to the second metering pump (22) for frequency conversion control of the second metering pump (22); the outlet of the first metering pump (20) is connected to the first exhaust valve (12); the outlet of the second metering pump (22) is connected to the second exhaust valve (16); the first potassium permanganate storage tank (1) is equipped with a first level gauge (32) for monitoring the potassium permanganate level in the first potassium permanganate storage tank (1); the first potassium permanganate storage tank (1) A first mixer (4) is provided, which is controlled by a PLC controller (28) to stir the potassium permanganate in the first potassium permanganate storage tank (1) at regular intervals; the second potassium permanganate storage tank (2) is provided with a second level gauge (31) to monitor the potassium permanganate liquid level in the second potassium permanganate storage tank (2); the second potassium permanganate storage tank (2) is provided with a second mixer (3), which is controlled by a PLC controller (28) to stir the potassium permanganate in the second potassium permanganate storage tank (2) at regular intervals.
2. The potassium permanganate dosing device for water supply plants according to claim 1, characterized in that: It includes two potassium permanganate dosing channels. The first potassium permanganate dosing channel includes a first manual ball valve (6), a first electric ball valve (7), a second manual ball valve (8), a first metering pump (20), a first check valve (13), a third electric ball valve (14), a first Y-type filter (15), a back pressure valve (24), and an electromagnetic flowmeter (25) connected in sequence to the outlet pipe at the bottom of the second potassium permanganate storage tank (2). The potassium permanganate is added to the raw water pipe after passing through the electromagnetic flowmeter (25). The first electric ball valve (7), the first metering pump (20), the first frequency converter (21), and the third electric ball valve (14) are controlled by a PLC controller (28). The system operates under control; the second level gauge (31) monitors the potassium permanganate level in the second potassium permanganate storage tank (2); when this potassium permanganate dosing channel is used, and the potassium permanganate level in the second potassium permanganate storage tank (2) is within the normal range, the PLC controller (28) controls the opening of the first electric ball valve (7) and the third electric ball valve (14), and the PLC controller (28) controls the operation of the first metering pump (20) and the first frequency converter (21); the first manual ball valve (6) and the second manual ball valve (8) are normally open, but when this potassium permanganate dosing channel is under fault repair, the first manual ball valve (6) and the second manual ball valve (8) are closed. Troubleshooting; The second potassium permanganate dosing channel includes the third manual ball valve (9), the second electric ball valve (10), the fourth manual ball valve (11), the second metering pump (22), the second check valve (17), the fourth electric ball valve (18), the second Y-type filter (19), the back pressure valve (24), and the electromagnetic flowmeter (25) connected in sequence to the outlet pipe at the bottom of the first potassium permanganate storage tank (1); Potassium permanganate is added to the raw water pipe after passing through the electromagnetic flowmeter (25), wherein the second electric ball valve (10), the second metering pump (22), the second frequency converter (23), and the fourth electric ball valve (18) are controlled by the PLC controller (28); The No. 1 level gauge (32) monitors the potassium permanganate level in the No. 1 potassium permanganate storage tank (1). When using this potassium permanganate dosing channel, and the potassium permanganate level in the No. 1 potassium permanganate storage tank (1) is within the normal range, the PLC controller (28) controls the No. 2 electric ball valve (10) and the No. 4 electric ball valve (18) to open, and the PLC controller (28) controls the No. 2 metering pump (22) and the No. 2 frequency converter (23) to run. The No. 3 manual ball valve (9) and the No. 4 manual ball valve (11) are normally open. When the potassium permanganate dosing channel is under fault repair, the No. 3 manual ball valve (9) and the No. 4 manual ball valve (11) are closed for fault repair.
3. The potassium permanganate dosing device for water supply plants according to claim 1, characterized in that: The two potassium permanganate dosing channels are operated in a one-in-use, one-in-standby mode to avoid affecting potassium permanganate dosing in the event of a malfunction in the metering pump or the corresponding channel, thus achieving continuous dosing.
4. The potassium permanganate dosing device for water supply plants according to claim 1, characterized in that: The first potassium permanganate storage tank (1) is equipped with a first level gauge (32) for monitoring the potassium permanganate liquid level in the first potassium permanganate storage tank (1); the second potassium permanganate storage tank (2) is equipped with a second level gauge (31) for monitoring the potassium permanganate liquid level in the second potassium permanganate storage tank (2).
5. The potassium permanganate dosing device for water supply plants according to claim 1, characterized in that: it is electrically controlled. The system (26) realizes the overall precise dosing control of the potassium permanganate dosing device. The electrical control system (26) is realized through the PLC controller (28). The PLC control system is connected to the electromagnetic flow meter (25), the first metering pump (20), the first frequency converter (21), the first electric ball valve (7), the third electric ball valve (14), the second metering pump (22), the second frequency converter (23), the second electric ball valve (10), the fourth electric ball valve (18), the touch screen (27), the first liquid level gauge (32), the second liquid level gauge (31), and the water inlet flow meter (5) of the water supply plant to realize automatic control.
6. The potassium permanganate dosing device for water supply plants according to claim 1, characterized in that: The potassium permanganate dosing device adopts two separate control modes: manual and automatic. On-site, the system operating parameters can be adjusted and set through the touch screen (27) of the electrical control system (26).
7. The potassium permanganate dosing device for water supply plants according to claim 1, characterized in that: The PLC controller (28) is connected to the fiber optic switch (29), which in turn is connected to the monitoring workstation (30). The monitoring workstation (30) is used for remote monitoring and data management of the potassium permanganate dosing process. It can control the PLC controller (28) and realize remote monitoring and management of the potassium permanganate dosing process through the monitoring workstation (30).
8. The potassium permanganate dosing device for water supply plants according to claim 1, characterized in that: By monitoring the inlet water flow of the water supply plant through the inlet water flow meter (5), the theoretical dosage Q is calculated by proportion. The dosage is controlled by the first frequency converter (21) and the second frequency converter (23) through the PLC controller (28) to control the dosage of the first metering pump (20) and the second metering pump (22). The dosage is monitored in real time by the electromagnetic flow meter (25).