Monitoring control system and method for achieving rotational flow well liquid level balance

Abstract

The invention relates to a monitoring control system and method for realizing rotational flow well liquid level balance, a PLC and a liquid level detector are additionally arranged on a continuous casting machine rotational flow well pump station, turbid circulating water inflow, actual liquid level height and turbid circulating water output are collected in real time, and data interaction with a server is carried out in a wired mode. According to the boundary dimension of the rotational flow well, the rotational flow well pump rotating speed and flow corresponding curve, the target liquid level value and other reference values, the rotational flow well liquid level achieves balanced operation in real time through a PLC, meanwhile, the theoretical water flow, the turbid circulating water output amount, the middle well actual liquid level and the middle well pump starting liquid level at the actual operation rotating speed of the pump are monitored, and when certain deviation is achieved, an abnormal alarm is given out. The rotating speed of the pump is corrected in real time, the set liquid level and the detected liquid level are within a certain deviation range, the balance of the input water amount and the output water amount of turbid circulating water is achieved, meanwhile, the state of the rotational flow well pump is monitored, and the problems of pump impeller cavitation, rotational flow well water level overflow and the like caused by large fluctuation of the liquid level in the past are solved.

Description

TECHNICAL FIELD

[0001] The patent application belongs to the technical field of continuous casting machine, more particularly, relates to a monitoring control system and method for realizing liquid level balance of a cyclone well. BACKGROUND

[0002] Continuous casting is a core link of steelmaking process control, needs to supply turbid circulating water to cool the casting blank, so as to produce qualified products, and a large amount of turbid circulating water needs to be balanced, otherwise the supply pump station cannot normally operate, resulting in unqualified water quality, which will endanger the quality of the casting blank, and therefore the function of the cyclone well needs to be concerned.

[0003] The configuration of the cyclone well pump is generally one standby, and the operation adopts a power frequency operation mode, resulting in a large liquid level fluctuation range, so that the probability of cavitation of the pump impeller occurs, the overall condition of the pump is seriously reduced, and the change demand of the liquid level cannot be timely responded and compensated. The existence of these factors causes abnormal events to frequently occur in the operation process of the cyclone well, such as pool overflow of the pump station caused by too low liquid level, and pump flooding of the cyclone well caused by too high liquid level.

[0004] Therefore, by adding a PLC control system and a liquid level detector to the cyclone well pump station, the control system collects and analyzes data, gives an alarm information to abnormal data, timely handles fault points, realizes stable operation of the liquid level of the cyclone well and prevents occurrence of equipment accidents. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a monitoring control system and method for realizing liquid level balance of a cyclone well, by adding a PLC control system and a liquid level detector to the cyclone well pump station, the control system collects and processes data, and real-time corrects the pump speed, so that the set liquid level and the detected liquid level are within a certain deviation, thereby balancing the input water quantity and the output water quantity of the turbid circulating water, and monitoring the state of the cyclone well pump, to ensure stable operation of the liquid level of the cyclone well, and effectively solve the above problems existing in the background art.

[0006] In order to solve the above problems, the technical scheme adopted by the present application is as follows:

[0007] A monitoring control system for realizing liquid level balance of a cyclone well, comprising a turbid circulating water inflow flowmeter connected with inflowing turbid circulating water, an outer well liquid level detector arranged in an outer well of the cyclone well, a middle well liquid level detector arranged in a middle well of the cyclone well, a cyclone well pump located on a platform of the cyclone well, an electric valve and a turbid circulating water output flowmeter connected with the cyclone well pump in sequence, the turbid circulating water inflow flowmeter, the outer well liquid level detector, the middle well liquid level detector, the cyclone well pump, the electric valve and the turbid circulating water output flowmeter are all connected with a PLC control system of the cyclone well, and the PLC control system is further connected with an HM1.

[0008] Further, the PLC control system is S7-300 type of SIEMENS company.

[0009] Further, the outer well liquid level detector and the middle well liquid level detector are both guided wave radar liquid level meters, and the model is Levelflex FMP51.

[0010] Further, the cyclone well pump is one active and one standby, and the model is 350WFB-CD3, the rotating speed is 1450r / min, the motor rated power is 315kw, and the corresponding flow is 1000m 3 / h.

[0011] A monitoring control method for realizing cyclone well liquid level balance, which utilizes the above system, and specifically includes the following steps:

[0012] S1, in the normal production of the continuous casting machine, the PLC control system of the cyclone well obtains the turbid ring water input flow Qs collected by the turbid ring water sending flowmeter, and the middle well actual liquid level value Hx collected by the middle well liquid level detector and the outer well actual liquid level value Hw collected by the outer well liquid level detector.

[0013] S2, the PLC control system calculates the circular ring area A of the known pumping position of the cyclone well pump based on the actual size of the cyclone well, and calculates the corresponding flow value Q1 of the cyclone well pump at a certain rotating speed N1, executes S3 when the liquid level detected by the outer well liquid level detector reaches the overflow liquid level value Hw, and the actual liquid level value Hx of the middle well detected by the middle well liquid level detector increases and reaches the middle well starting liquid level value Hq of the cyclone well pump.

[0014] S3, the PLC control system gives a cyclone well pump starting command to open the electric valve, and gives the actual running rotating speed Nj of the cyclone well pump at the same time; collects the turbid ring water sending flow Qc and the target setting liquid level Hs of the turbid ring water sending flowmeter, and the PLC control system optimizes the actual running rotating speed Nj of the cyclone well pump in real time, so as to realize that the target setting liquid level Hs and the target liquid level H, the turbid ring water input flow Qs and the turbid ring water sending flow Qc are all within a reasonable deviation range, and the cyclone well liquid level balance is realized.

[0015] The turbid ring water sending flow Qc is compared and corrected with the middle well calculated flow Qj of the cyclone well. Here, the turbid ring water sending flow Qc is the actual embodiment of the middle well calculated flow Qj, if the deviation is too large, it means that there is a problem with the performance of the pump, and after the rotating speed is adjusted, there is still a problem, an alarm will be given, and the standby pump will be started. See step S4 for details:

[0016] S4, the turbid ring water sending flow Qc is collected in real time, and when the middle well calculated flow Qj and the turbid ring water sending flow Qc reach a certain deviation value under the actual running rotating speed of the cyclone well pump, the PLC control system gives an abnormal alarm information to prevent the occurrence of abnormal accidents of the cyclone well liquid level.

[0017] Further, in S1, it is recorded that in the normal production of the continuous casting machine, the PLC control system of the vortex well, the input flow Qs of the turbid circulating water, the actual liquid level value Hx collected by the middle well liquid level detector, and the actual liquid level value Hw collected by the outer well liquid level detector all interact with each other through Ethernet communication.

[0018] Further, in S2, the judgment formula for calculating the circular ring area A of the known pumping position of the vortex well pump is:

[0019]

[0020] A = π (D1 - D2) Hq 2 ;

[0021] Wherein:

[0022] D1..... the inner well wall diameter of the vortex well, m;

[0023] D2..... the middle well wall diameter of the vortex well, mm;

[0024] The judgment formula for the rotational speed and flow of the vortex well pump is:

[0025]

[0026] Q1 = 0.0018 N1 3 / h;

[0027] N1..... the rotational speed of the vortex well pump, r / min;

[0028] Q2..... the calculated flow when the rotational speed of the vortex well pump is N2, m 3 / h;

[0029] N2..... the given calculated rotational speed, r / min.

[0030] Further, in S4, the calculation formula for the middle well calculated flow Qj of the vortex well is:

[0031]

[0032] Qj = 0.0018 N1 (Hq - Hx) 3 / h;

[0033] Hq..... the middle well starting liquid level value, m; that is, when the outer well liquid level is Hw and the overflow height, the middle well liquid level starts to increase, and after a certain period of time, the middle well starting liquid level value Hq is reached;

[0034] Hx..... When the outer well liquid level is Hw, the middle well actual liquid level value of the middle well liquid level, m;

[0035] A..... The circular ring area A of the cyclone well pump pumping position, m 2 ;

[0036] t..... Time from Hx to Hq, min;

[0037] K..... The correction coefficient of turbid ring water input flow, 0.95 is taken according to the actual situation;

[0038] Qs.... Turbid ring water input flow, m 3 / h;

[0039] The running speed calculation and judgment formula of the cyclone well pump is:

[0040]

[0041] In the formula: Nj..... When the calculated flow of the middle well is Qj, the calculated actual running speed, r / min.

[0042] Further, in S4, the monitoring and judgment principle and the disposal strategy are:

[0043] No. Judgment criteria Treatment strategy Remark 1 Qj and Qc deviation ≥ 5% Increase or decrease Nj rotating speed Both deviation < 5% without adjustment 2 Qj and Qc deviation > 10% Start standby pump Disassemble and repair the pump

[0044] Due to the adoption of the above technical scheme, the beneficial effects obtained by the present application are:

[0045] The system has simple structure, low manufacturing cost, easy replacement of parts, simple and convenient monitoring method, through the PLC control system and the liquid level detector on the cyclone well pump station, the control system collects and processes data, real-time correction of pump speed, so that the set liquid level and the detected liquid level are within a certain deviation, thereby realizing the balance of turbid ring water input and output water quantity, and monitoring the state of the cyclone well pump, ensuring the stable operation of the cyclone well liquid level, effectively solving the above problems existing in the background technology.

[0046] The control system of the method collects data, analyzes and compares data, and gives alarm information to abnormal data, timely handles fault points, realizes stable operation of the cyclone well liquid level and prevents equipment accidents, and has very high popularization and application value. BRIEF DESCRIPTION OF DRAWINGS

[0047] Fig. 1 It is the overall structure schematic diagram of the system of the present application;

[0048] Fig. 2 It is the control flow chart of the method of the present application;

[0049] In the figure: 1. Turbid circulating water inflow flowmeter, 2. HM1, 3. PLC control system, 4. External well liquid level detector, 5. Middle well liquid level detector, 6. Swirl well pump, 7. Electric valve, 8. Turbid circulating water delivery flowmeter. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below with reference to the embodiments.

[0051] The present invention provides a monitoring and control system for realizing the liquid level balance of the vortex well, such as Fig. 1 The system includes a turbid ring water inflow flowmeter 1 connected to the incoming turbid ring water, an outer well liquid level detector 4 located in the outer well of the vortex well, a middle well liquid level detector 5 located in the middle well of the vortex well, a vortex well pump 6 located on the vortex well platform, an electric valve 7 connected in sequence to the vortex well pump 6, and a turbid ring water delivery flowmeter 8. The turbid ring water inflow flowmeter 1, outer well liquid level detector 4, middle well liquid level detector 5, vortex well pump 6, electric valve 7, and turbid ring water delivery flowmeter 8 are all connected to a PLC control system 3, which is also connected to HM12. The vortex well is divided into an inner well, a middle well, and an outer well.

[0052] In terms of model selection, the PLC control system 3 is a SIEMENS S7-300. The outer well liquid level detector 4 and the middle well liquid level detector 5 are both guided wave radar level meters, model Levelflex FMP51.

[0053] In terms of configuration model and parameters, the vortex well pump 6 is one in use and one in standby, model 350WFB-CD3, speed 1450r / min, motor rated power 315kw, corresponding flow rate is 1000m3 / h.

[0054] By using the above system, the present invention also discloses a monitoring and control method for realizing the liquid level balance of the vortex well, such as Fig. 2 , including the following steps:

[0055] S1. During normal production of the continuous casting machine, the PLC control system 3 of the vortex well obtains the turbid circulating water input flow Qs collected by the turbid circulating water delivery flowmeter 8, as well as the actual liquid level value Hx of the middle well collected by the middle well liquid level detector 5 and the actual liquid level value Hw of the outer well collected by the outer well liquid level meter 4.

[0056] In step S1, during normal production of the continuous casting machine, the PLC control system 3 of the vortex well and the turbid circulating water input flow Qs, the actual liquid level value Hx of the middle well collected by the middle well liquid level detector 5, and the actual liquid level value Hw of the outer well collected by the outer well liquid level detector 4 all exchange data through Ethernet communication.

[0057] S2, the PLC control system 3 calculates the circular ring area A of the cyclone well pump 6 at a known pumping position based on the actual size of the cyclone well; based on the corresponding flow value Q1 of the cyclone well pump 6 at a certain speed N1, when the outer well liquid level detector 4 detects that the liquid level reaches the overflow liquid level value Hw, and the middle well liquid level detector 5 detects that the actual liquid level value Hx of the middle well increases and reaches the middle well starting liquid level value Hq of the cyclone well pump 6 (the middle well starting liquid level value Hq in the subsequent example is 3.5m), execute S3;

[0058] In S2, the formula for "calculating the circular ring area A of the cyclone well pump 6 at a known pumping position" is:

[0059]

[0060] A.....circular ring area, m 2 ;

[0061] Wherein:

[0062] D1.....cyclone well inner wall diameter, m;

[0063] D2.....cyclone well middle wall diameter, mm;

[0064] The judgment formula of the cyclone well pump 6 speed and flow:

[0065]

[0066] Q1.....the flow of the cyclone well pump 6 at speed N1, m 3 / h;

[0067] N1.....the speed of the cyclone well pump 6, which is the rated speed, r / min;

[0068] Q2.....the calculated flow of the cyclone well pump 6 at speed N2, m 3 / h;

[0069] N2.....the given calculation speed, r / min.

[0070] S3, the PLC control system 3 gives the starting command of the cyclone well pump 6, opens the electric valve 7, and gives the actual running speed Nj of the cyclone well pump 6; collects the turbid ring water sending flow Qc of the turbid ring water sending flow meter 8 and the target setting liquid level Hs, the PLC control system 3 optimizes the actual running speed Nj of the cyclone well pump 6 in real time, so that the target setting liquid level Hs and the target liquid level H, the turbid ring water input flow Qs and the turbid ring water sending flow Qc are all within a reasonable deviation range, so as to realize the balance of the cyclone well liquid level, and this deviation is generally 10% or ±0.1m up and down.

[0071] Then, the turbid circulating water output flow Qc is compared with the middle well calculated flow Qj of the cyclone well to make correction. The turbid circulating water output flow Qc is the actual embodiment of the middle well calculated flow Qj. If the deviation is too large, it indicates that the performance of the cyclone well pump 6 has a problem. If the problem still exists after the speed is adjusted, an alarm will be given, and the standby pump will be started.

[0072] 1. The target setting liquid level Hs and the target liquid level H are within a reasonable deviation range, which means that under the actual running speed Nj, the target setting liquid level Hs and the theoretically calculated liquid level (i.e. the target liquid level H) will be generated. If the deviation between the two is not greater than 0.1 m, it is considered normal, and if the deviation exceeds 0.1 m, the PLC frequency conversion speed adjustment will be performed.

[0073] For example, if the target setting liquid level Hs is 3.1 m, then the target liquid level H is 3.1 ± 0.1 m, which is qualified. Then, under the actual running speed Nj, the theoretically calculated liquid level is generated. After a period of operation, it is found that the theoretically calculated liquid level does not reach the target setting liquid level Hs, and the deviation is greater than 0.1 m. For example, the theoretically calculated liquid level is 3.3 m, and the deviation is 0.2 m, which exceeds 0.1 m. Therefore, the actual running speed Nj needs to be optimized again. The deviation between the target setting liquid level Hs and the middle well starting liquid level value Hq is also within 0.1 m. If the deviation between the target setting liquid level Hs and the middle well starting liquid level value Hq is greater than 0.1 m, the actual running speed Nj also needs to be optimized again.

[0074] 2. The turbid circulating water input flow Qs and the turbid circulating water output flow Qc are within a reasonable deviation range. At this time, it is believed that the turbid circulating water input flow Qs will inevitably lose a certain amount after passing through the high-temperature casting blank. If the deviation between the two is too large, such as an up and down fluctuation of more than 10%, there may be a leak of turbid circulating water in the conveying pipeline, or the flow meter may be damaged, etc. At this time, the corresponding alarm will be generated.

[0075] S4. The turbid circulating water output flow Qc is compared with the middle well calculated flow Qj of the cyclone well to make correction. The turbid circulating water output flow Qc is the actual embodiment of the middle well calculated flow Qj. If the deviation is too large, it indicates that the performance of the cyclone well pump 6 has a problem. If the problem still exists after the speed is adjusted, an alarm will be given, and the standby pump will be started.

[0076] When the target set liquid level Hs of the middle well and the middle well starting liquid level value Hq deviate, it also needs to be corrected. For example, after the cyclone well pump 6 is started, it needs time t1 to reach the middle well starting liquid level value Hq. If the deviation between the actual time consumption ts and t1 is less than 10%, it proves to be normal; if it is greater than 10%, the cyclone well pump 6 is continuously started by frequency conversion; if it is greater than 30%, it proves that the cyclone well pump 6 has a fault, the PLC control system 3 sends an abnormal alarm information, and the standby pump is started. Similarly, the middle well starting liquid level value Hq reaches the target set liquid level Hs after time t2, and the deviation between the time consumption and t2 is less than 10%, which is normal; if it is greater than 10%, the cyclone well pump 6 is continuously started by frequency conversion; if it is greater than 30%, it proves that the cyclone well pump 6 has a fault, the PLC control system 3 sends an abnormal alarm information, and the standby pump is started.

[0077] The specific monitoring and judgment principles and disposal strategies of Qj and Qc are as follows:

[0078]

[0079]

[0080] In S4, the calculation formula of the middle well calculation flow rate Qj of the cyclone well is as follows:

[0081]

[0082] In the formula, Qj represents the middle well calculation flow rate of the cyclone well, m 3 / h;

[0083] Hq represents the middle well starting liquid level value, m; that is, when the outer well liquid level is Hwyspillover height, the middle well liquid level starts to increase, and after a certain time, the middle well starting liquid level value is reached;

[0084] Hx represents the middle well actual liquid level value of the middle well liquid level when the outer well liquid level is Hwyspillover height, m;

[0085] A represents the circular ring area A of the water pumping position of the cyclone well pump 6, m 2 ;

[0086] t represents the time from Hx to Hq, min;

[0087] K represents the correction coefficient of the turbid ring water input flow rate, which is 0.95 according to the actual situation;

[0088] Qs represents the turbid ring water input flow rate, m 3 / h;

[0089] The running speed calculation and judgment formula of the cyclone well pump 6 is as follows:

[0090]

[0091] Nj = 1357 r / min; where: Nj... the calculated actual operating speed, r / min, when the calculated flow rate of the middle well is Qj.

[0092] Embodiment

[0093] This embodiment is the control system for stable operation of the first-stage cyclone liquid level of Tangshan Iron and Steel Company.

[0094] The newly added PLC control system 3 of the small-scale continuous casting cyclone is S7-300 type of SIEMENS Company, two sets of newly added guided-wave radar liquid level meters are model Levelflex FMP51, the cyclone pump 6 is one active and one standby, the model is 350WFB-CD3, the rotating speed is 1450 r / min, the rated power of the motor is 315 kw, the corresponding flow rate is 1000 m3 / h, the inner well wall diameter D1 of the cyclone is 4.7 m, the middle well wall diameter D2 of the cyclone is 10.7 m, the 4 m high liquid level alarm, the 1.1 m low liquid level alarm, the 2.3 m liquid level working pump stop, the set working pump middle well starting liquid level value Hq is 3.5 m.

[0095] At this time, the continuous casting machine is in normal production, the real-time data is collected by the PLC control system 3 of the cyclone, when the outer well reaches the overflow liquid level Hwv=4.5 m, the collection is started, at this time, the actual liquid level value Hx of the middle well is 2.3 m, after 5.58 min, the middle well starting liquid level value Hq=3.5 m is reached, the pump is used for 2.42 min and then normally operates. At this time, the set rotating speed 1357 r / min is given by the PLC control system 3, after 5 min of operation, the target set liquid level Hs=3.9 m is collected by the middle well liquid level detector 5, the turbid circulating water sending out flow rate Qc is 805 m 3 / h, at this time, the system issues a monitoring alarm, the information is that the main pump flow rate is abnormal, at the same time, the working pump is accelerated to the working frequency, at the same time, the output compensation control logic is carried out according to the actual flow rate deviation, the standby pump is started, and in order to ensure the pumping effect of the standby pump, the minimum frequency of 20 Hz is determined as the motor output, on this basis, the output of the motor frequency value and the number of rotations are increased, until the balance of the inflow and outflow of the cyclone is ensured and the normal operation is realized.

[0096] According to the corresponding judgment formula:

[0097]

[0098] Substitute the above formula:

[0099] Nj=1357 r / min;

[0100] The PLC control system 3 outputs this rotating speed Nj to the cyclone pump 6 by frequency conversion, and the turbid circulating water sending out flow rate Qc of the turbid circulating water sending out flow meter 8 is 805 m 3 / h,

[0101]

[0102] Both deviations > 10%, so the system sends a monitoring alarm message.

[0103] The online application of the present application greatly improves the efficient operation of the vortex well pump, predicts the cracking of the vortex well pump in advance, and eliminates the occurrence of abnormal events.

Claims

1. A monitoring and control system for realizing the liquid level balance of a vortex well, characterized in that: The invention comprises a turbid ring water inflow flowmeter (1) connected to the inflowing turbid ring water, an outer well liquid level detector (4) arranged in the outer well of the vortex well, a middle well liquid level detector (5) arranged in the middle well of the vortex well, a vortex well pump (6) located on the vortex well platform, an electric valve (7) and a turbid ring water delivery flowmeter (8) connected to the vortex well pump (6) in sequence. The turbid ring water inflow flowmeter (1), the outer well liquid level detector (4), the middle well liquid level detector (5), the vortex well pump (6), the electric valve (7) and the turbid ring water delivery flowmeter (8) are all connected to the PLC control system (3) of the vortex well, and the PLC control system (3) is also connected to HM1 (2).

2. A monitoring and control system for achieving vortex well liquid level balance according to claim 1, characterized in that: The PLC control system (3) is the S7-300 model of SIEMENS.

3. A monitoring and control system for achieving vortex well liquid level balance according to claim 1, characterized in that: The outer well liquid level detector (4) and the middle well liquid level detector (5) are both guided wave radar liquid level meters, model Levelflex FMP51.

4. A monitoring and control system for achieving vortex well liquid level balance according to claim 1, characterized in that: The vortex well pump (6) is one for use and one for backup, model 350WFB-CD3, speed 1450r / min, motor rated power 315kw, corresponding flow rate 1000m 3 / h.

5. A monitoring and control method for realizing the liquid level balance of a vortex well, utilizing the system according to any one of claims 1 to 4, characterized in that The following steps are involved: S1. During normal production of the continuous casting machine, the PLC control system (3) of the vortex well obtains the turbid circulating water input flow rate Qs collected by the turbid circulating water delivery flow meter (8), the actual liquid level value Hx of the middle well collected by the middle well liquid level detector (5), and the actual liquid level value Hw of the outer well collected by the outer well liquid level meter (4); S2, the PLC control system (3) calculates the annular area A of the known pumping position of the vortex well pump (6) based on the actual size of the vortex well; based on the corresponding flow value Q1 of the vortex well pump (6) at a certain speed N1, when the outer well liquid level detector (4) detects that the liquid level reaches the overflow liquid level value Hwy, and the middle well liquid level detector (5) detects that the actual liquid level value Hx of the middle well increases and reaches the condition of the middle well starting liquid level value Hq of the vortex well pump (6), S3 is executed; S3, the PLC control system (3) gives a start command to the vortex well pump (6), opens the electric valve (7), and gives the actual operating speed Nj of the vortex well pump (6); collects the turbid water delivery flow Qc and the target set liquid level Hs from the turbid water delivery flow meter (8), and the PLC control system (3) optimizes the actual operating speed Nj of the vortex well pump (6) in real time, so as to achieve the target set liquid level Hs and the target liquid level H, and the turbid water input flow Qs and the turbid water delivery flow Qc are all within a reasonable deviation range, so as to achieve the liquid level balance of the vortex well; S4. Compare and correct the turbid water delivery flow rate Qc with the calculated flow rate Qj of the middle well of the vortex well, collect the turbid water delivery flow rate Qc in real time, monitor the vortex well pump (6) at the actual operating speed Nj, and when the calculated flow rate Qj of the middle well and the turbid water delivery flow rate Qc reach a certain deviation value, the PLC control system (3) issues an abnormal alarm message to prevent the occurrence of abnormal liquid level accidents in the vortex well.

6. The monitoring and control method for realizing the liquid level balance of a vortex well according to claim 5, characterized in that: In S1, during normal production of the continuous casting machine, the PLC control system (3) of the vortex well and the turbid circulating water input flow Qs, the actual liquid level value Hx of the middle well, and the actual liquid level value Hw of the outer well all exchange data through Ethernet communication.

7. The monitoring and control method for realizing the liquid level balance of a vortex well according to claim 6, characterized in that: In S2, the judgment formula for "calculating the annular area A of the known pumping position of the vortex well pump (6)" is: Where: A.....area of ​​the ring, m 2 ; in: D1.....diameter of the inner wall of the vortex well, m; D2.....Diameter of the well wall in the vortex well, mm; The formula for determining the rotation speed and flow rate of the vortex well pump (6) is: Where: Q1.....Flow rate of vortex pump (6) when the speed is N1, m 3 / h; N1.....Speed ​​of the vortex well pump (6), rated speed, r / min; Q2.....Calculated flow rate of vortex well pump (6) when the speed is N2, m 3 / h; N2.....given calculated speed, r / min.

8. The monitoring and control method for realizing the liquid level balance of a vortex well according to claim 7, characterized in that: In S4, the calculation formula for the flow rate Qj of the middle well of the vortex well is: Where: Qj.....Calculated flow rate of the middle well of the vortex well, m 3 / h; Hq.....Starting liquid level value of the middle well, m; Hx.....When the outer well liquid level is at the overflow height of Hwy, the actual liquid level value of the middle well liquid level, in m; A.....Circular area A of the pumping position of the vortex well pump (6), m 2 ; t.....time from Hx to Hq, min; K.....Correction coefficient of turbid circulating water input flow rate; Qs....Turbid circulating water input flow, m 3 / h; The calculation formula for the operating speed of the vortex well pump (6) is: Where: Nj.....When the calculated flow rate of the well is Qj, the actual operating speed calculated is r / min.

9. The monitoring and control method for realizing the liquid level balance of a vortex well according to claim 8, characterized in that: In S4, the monitoring and judgment principles and disposal strategies for Qj and Qc are: 。

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