Operation state diagnosis system for industrial wastewater treatment equipment

Abstract

The invention relates to the technical field of industrial wastewater treatment, and discloses an industrial wastewater treatment equipment operation state diagnosis system which is applied to an MVR evaporator, the MVR evaporator comprises a water inlet pipe, a heat exchanger, a gas-liquid separation pipe and a steam eduction pipe which are connected in sequence, and the operation state diagnosis system comprises a monitoring module and an analysis module. The running state of the evaporator is monitored through a monitoring module, and the real-time sewage temperature, the real-time liquid inlet flow speed and the real-time moisture content in a water inlet pipe and the real-time gas flow speed of a steam guide-out pipe in the running process of the evaporator are obtained; the real-time sewage temperature, the real-time liquid inlet flow speed and the real-time moisture content in the water inlet pipe and the real-time gas flow speed of the steam eduction pipe are analyzed through an analysis module, and whether the evaporator is abnormal or not is judged according to the analysis result; whether the evaporator is abnormal or not can be more accurately and timely judged, and maintenance is timely carried out when the evaporator is abnormal.

Description

Technical Field

[0001] The invention relates to the technical field of industrial wastewater treatment, and in particular to an industrial wastewater treatment equipment operating status diagnosis system. Background Art

[0002] With the rapid development of industry, the environmental problems caused by industrial production are becoming increasingly serious. In order to reduce the pollution of industrial wastewater to the environment, my country has used zero-emission treatment technology for industrial wastewater in various industries such as energy, chemical industry, and papermaking.

[0003] Chinese patent CN202211653259.7 discloses a system and method for treating high-concentration organic industrial wastewater to achieve zero emission, which achieves zero emission of industrial wastewater and reduces pollution to the environment by sequentially passing industrial wastewater into a regulating tank, a hydrolysis acidification tank, a primary anoxic tank, a primary aerobic tank, a sewage return well, a medium sedimentation tank, a secondary anoxic tank, a secondary aerobic tank, a secondary sedimentation tank, a water collection well, a sludge thickening tank, a plate and frame filter press room, a functional organic fertilizer manufacturing room, a blower room, a dosing room, a multi-media filter, an ultrafiltration device, an ultrafiltration water tank, a reverse osmosis lift pump, a security filter, a reverse osmosis high-pressure pump, a reverse osmosis device, an MVR evaporator, a reverse osmosis water tank and a disinfection and reuse water tank.

[0004] Among them, the sewage generated after treatment by the reverse osmosis device enters the heat exchange tubes in the MVR evaporator. The heat exchange tubes heat the sewage and then begin to evaporate. The gas-liquid mixture generated by evaporation enters the gas-liquid separator and then the gas and liquid are separated. The heat exchanger separates the solute and water in the sewage generated by the reverse osmosis process through the heat exchanger to recover the solute. It is a key equipment in the zero emission system for industrial wastewater treatment. If the MVR evaporator fails, the evaporation volume will be reduced, affecting the sewage treatment efficiency. However, the evaporation volume of the evaporator is also related to the temperature and moisture content of the sewage. Therefore, when the evaporation volume is reduced, the staff cannot accurately distinguish whether the evaporator is abnormal. Summary of the invention

[0005] The purpose of the present invention is to provide an industrial wastewater treatment equipment operating status diagnosis system to solve the following technical problems:

[0006] How to accurately determine whether the evaporator is abnormal when the evaporation volume decreases.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] An industrial wastewater treatment equipment operation status diagnosis system is applied to an MVR evaporator, wherein the MVR evaporator includes a water inlet pipe, a heat exchanger, a gas-liquid separation pipe and a steam outlet pipe connected in sequence. The operation status diagnosis system includes:

[0009] A monitoring module is used to monitor the operating status of the evaporator and obtain monitoring data of the evaporator operation; the monitoring data includes the real-time sewage temperature in the water inlet pipe, the real-time liquid inlet flow rate, the real-time moisture content and the real-time gas flow rate of the steam outlet pipe;

[0010] The analysis module is used to analyze the real-time sewage temperature, real-time liquid inlet flow rate, real-time moisture content in the water inlet pipe and the real-time gas flow rate of the steam outlet pipe, and judge whether the evaporator is abnormal based on the analysis results.

[0011] As a further solution of the present invention: the analysis process of the analysis module is:

[0012] S1: Obtain the real-time liquid flow rate in the water inlet pipe through the monitoring module;

[0013] S2: By comparing the real-time liquid inlet flow rate with the preset liquid inlet flow rate, a flow rate difference change curve of the difference between the real-time liquid inlet flow rate and the preset liquid inlet flow rate over time is obtained;

[0014] S3: Analyze the flow rate difference change curve from the start of the evaporator to the current moment to obtain the flow rate difference influence coefficient;

[0015] S4: By analyzing the real-time sewage temperature and real-time moisture content from the start of the evaporator to the current moment, the deviation influence coefficient is obtained;

[0016] S5: Obtain a state assessment index by analyzing the real-time gas flow rate, flow rate difference influence coefficient and deviation influence coefficient of the steam outlet pipe from the time the evaporator is started to the current moment;

[0017] S6: Determine whether the evaporator is abnormal by analyzing the status evaluation index.

[0018] As a further solution of the present invention: the judgment result of whether the evaporator is abnormal includes: no abnormality, slight abnormality and serious abnormality.

[0019] As a further solution of the present invention: the process of obtaining the velocity difference influence coefficient includes:

[0020] S10: Analyzing the flow rate difference change curve from the start of the evaporator to the current moment, obtaining multiple time periods with positive flow rate differences and multiple time periods with negative flow rate differences from the start of the evaporator to the current moment;

[0021] S20: Calculate the velocity difference influence coefficient using a preset analysis formula.

[0022] As a further solution of the present invention: the preset analysis formula is:

[0023]

[0024] Among them, δ C V is the velocity difference influence coefficient; c (t) is the velocity difference change curve; N is the number of time periods in which the velocity difference is negative from the start of the evaporator to the current moment, n∈N; M is the number of time periods in which the velocity difference is positive from the start of the evaporator to the current moment, m∈M; t 1n The starting time of the nth time period in which the flow rate difference is negative from the start of the evaporator to the current moment; t 2n The end time of the time period from the start of the evaporator to the current moment when the nth flow rate difference is negative; t 1m is the starting time of the mth time period with a positive flow rate difference from the start of the evaporator to the current moment; t 2m The end time of the mth time period with a positive flow rate difference from the start of the evaporator to the current moment; C 1 is the first preset constant.

[0025] As a further solution of the present invention: the deviation influence coefficient is obtained by the formula:

[0026]

[0027] Calculate the deviation influence coefficient δ P ;

[0028] Among them, t a is the evaporator opening time; t b is the current time; T f (t) is the temperature variation curve of the real-time temperature of the sewage in the inlet pipe from the time when the evaporator is turned on to the current time; T 0 (t) is the preset temperature variation curve of the sewage in the inlet pipe over time; C f (t) is the curve of the real-time moisture content of the sewage in the water inlet pipe from the time when the evaporator is turned on to the current time; C 0 (t) is the curve of the preset water content of the sewage in the inlet pipe changing with time; γ 1 is the first weight coefficient; γ 2 is the second weight coefficient; C 2 is the second preset constant; C 3 is the third preset constant; ε is the unit-removing coefficient.

[0029] As a further solution of the present invention: the state evaluation index is calculated by the formula:

[0030]

[0031] Calculate the status assessment index R;

[0032] Among them, f(X) is a judgment function. When X > 0, f(X) = X; when X ≤ 0, f(X) = 0; G 0 (t) is the curve of the preset gas flow rate of the steam outlet pipe changing with time; S is the cross-sectional area of the steam outlet pipe; G f (t) is the curve of the real-time gas flow rate of the steam outlet pipe changing with the air flow rate over time; W is the allowable error.

[0033] As a further solution of the present invention: The process of judging whether the evaporator is abnormal is as follows: Compare the state evaluation index R with the preset value R 1 as follows:

[0034] When R = 1, the evaporator is normal;

[0035] When 1 < R ≤ R 1 at this time, the evaporator is slightly abnormal; a first-level warning is issued;

[0036] When R 1 < R, the evaporator is seriously abnormal, and a second-level warning is issued.

[0037] Advantages of the present invention:

[0038] (1) The present invention monitors the operating state of the evaporator through the monitoring module, and obtains the real-time sewage temperature, real-time liquid inlet flow rate, real-time moisture content in the inlet pipe of the evaporator operation, and the real-time gas flow rate of the steam outlet pipe; the analysis module analyzes the real-time sewage temperature, real-time liquid inlet flow rate, real-time moisture content in the inlet pipe, and the real-time gas flow rate of the steam outlet pipe, and judges whether the evaporator is abnormal according to the analysis result; enables the evaporator to more accurately and timely judge whether the evaporator is abnormal, and perform maintenance in time when the evaporator is abnormal. Description of the Drawings

[0039] The present invention will be further described below with reference to the accompanying drawings.

[0040] Figure 1 It is the system module framework diagram of an embodiment of the present invention. Specific Embodiments

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Please refer to Figure 1As shown, in one embodiment, an industrial wastewater treatment equipment operation status diagnosis system is provided, which is applied to an MVR evaporator, wherein the MVR evaporator includes a water inlet pipe, a heat exchanger, a gas-liquid separation pipe and a steam outlet pipe connected in sequence;

[0043] The operating status diagnosis system comprises:

[0044] A monitoring module is used to monitor the operating status of the evaporator and obtain monitoring data of the evaporator operation; the monitoring data includes the real-time sewage temperature in the water inlet pipe, the real-time liquid inlet flow rate, the real-time moisture content and the real-time gas flow rate of the steam outlet pipe;

[0045] The analysis module is used to analyze the real-time sewage temperature, real-time liquid inlet flow rate, real-time moisture content in the water inlet pipe and the real-time gas flow rate of the steam outlet pipe, and judge whether the evaporator is abnormal based on the analysis results.

[0046] Through the above technical scheme, this embodiment monitors the operating status of the evaporator through the monitoring module, and obtains the real-time sewage temperature, real-time liquid inlet flow rate, real-time moisture content in the water inlet pipe of the evaporator and the real-time gas flow rate of the steam outlet pipe; specifically, the real-time sewage temperature can be obtained by a temperature sensor arranged in the water inlet pipe; the real-time liquid inlet flow rate can be obtained by a liquid flow meter arranged in the water inlet pipe; the real-time moisture content can be obtained by a sensor-type online moisture meter arranged at the front end of the water inlet pipe; the real-time gas flow rate of the steam outlet pipe can be obtained by a gas flow meter arranged in the steam outlet pipe; the real-time sewage temperature, real-time liquid inlet flow rate, real-time moisture content and real-time gas flow rate of the steam outlet pipe in the water inlet pipe are analyzed by the analysis module, and it is judged whether the evaporator is abnormal according to the analysis results; so that the evaporator can be judged whether the evaporator is abnormal more accurately and timely, and timely maintenance can be carried out when the evaporator is abnormal.

[0047] As an implementation manner of the present invention, the analysis process of the analysis module is:

[0048] S1: Obtain the real-time liquid flow rate in the water inlet pipe through the monitoring module;

[0049] S2: By comparing the real-time liquid inlet flow rate with the preset liquid inlet flow rate, a flow rate difference change curve of the difference between the real-time liquid inlet flow rate and the preset liquid inlet flow rate over time is obtained;

[0050] S3: Analyze the flow rate difference change curve from the start of the evaporator to the current moment to obtain the flow rate difference influence coefficient;

[0051] S4: By analyzing the real-time sewage temperature and real-time moisture content from the start of the evaporator to the current moment, the deviation influence coefficient is obtained;

[0052] S5: Obtain a state assessment index by analyzing the real-time gas flow rate, flow rate difference influence coefficient and deviation influence coefficient of the steam outlet pipe from the time the evaporator is started to the current moment;

[0053] S6: By analyzing the status evaluation index, determine whether the evaporator is abnormal;

[0054] Through the above technical scheme, this embodiment first obtains the real-time liquid inlet flow rate in the water inlet pipe through the monitoring module; then compares the real-time liquid inlet flow rate with the preset liquid inlet flow rate to obtain the flow rate difference change curve of the difference between the real-time liquid inlet flow rate and the preset liquid inlet flow rate over time; then, the flow rate difference influence coefficient is obtained by analyzing the flow rate difference change curve from the start-up of the evaporator to the current moment; then, the deviation influence coefficient is obtained by analyzing the real-time sewage temperature and the real-time moisture content from the start-up of the evaporator to the current moment; then, the state evaluation index is obtained by analyzing the real-time gas flow rate, the flow rate difference influence coefficient and the deviation influence coefficient of the steam outlet pipe from the start-up of the evaporator to the current moment; finally, by analyzing the state evaluation index, it is judged whether the evaporator is abnormal; so that the evaporator can be judged whether the evaporator is abnormal more accurately and timely, and timely maintenance can be carried out when the evaporator is abnormal.

[0055] As an implementation manner of the present invention, the process of obtaining the velocity difference influence coefficient includes:

[0056] S10: Analyzing the flow rate difference change curve from the start of the evaporator to the current moment, obtaining multiple time periods with positive flow rate differences and multiple time periods with negative flow rate differences from the start of the evaporator to the current moment;

[0057] S20: Calculate the velocity difference influence coefficient by a preset analysis formula;

[0058] The preset analysis formula is:

[0059]

[0060] Among them, δ C V is the velocity difference influence coefficient; c (t) is the velocity difference change curve; N is the number of time periods in which the velocity difference is negative from the start of the evaporator to the current moment, n∈N; M is the number of time periods in which the velocity difference is positive from the start of the evaporator to the current moment, m∈M; t 1n The starting time of the nth time period in which the flow rate difference is negative from the start of the evaporator to the current moment; t 2n The end time of the time period from the start of the evaporator to the current moment when the nth flow rate difference is negative; t 1mis the starting time of the mth time period with a positive flow rate difference from the start of the evaporator to the current moment; t 2m The end time of the mth time period with a positive flow rate difference from the start of the evaporator to the current moment; C 1 is the first preset constant;

[0061] Through the above technical solution, this embodiment The accumulated flow rate difference value in the nth time period when the flow rate difference value is negative; It is the accumulated flow rate difference in N time periods when the flow rate difference is negative. If the flow rate difference is negative, it means that the real-time inlet flow rate is less than the preset inlet flow rate, which means that after the sewage in the inlet pipe enters the heater, the contact time with the heater increases, the sewage can absorb more heat, and the evaporation of sewage increases. The greater the absolute value of the accumulated flow rate difference in N time periods when the flow rate difference is negative, the greater the increase in sewage evaporation. The flow rate difference influence coefficient δ C The bigger; is the accumulated flow velocity difference in the mth time period when the flow velocity difference is a positive number; It is the cumulative amount of velocity difference in M ​​time periods with positive velocity difference. If the velocity difference is positive, it means that the real-time inlet flow rate is greater than the preset inlet flow rate, which means that after the sewage in the inlet pipe enters the heater, the contact time with the heater is shortened, the sewage cannot absorb enough heat, and the evaporation of sewage is reduced. The greater the absolute value of the cumulative amount of velocity difference in M ​​time periods with positive velocity difference, the greater the reduction in sewage evaporation. The velocity difference influence coefficient δ C Decrease; when the N flow rate differences are negative, the accumulated flow rate difference The accumulated flow rate difference between the N time periods with positive flow rate differences When both are 0, the velocity difference influence coefficient δ C is 1;

[0062] It should be noted that the number of time periods N in which the flow velocity difference is negative from the start of the evaporator to the current moment, the number of time periods M in which the flow velocity difference is positive from the start of the evaporator to the current moment, and the start and end times of each time period are represented by the flow velocity difference change curve V c (t) is obtained by analysis, the analysis method is the existing technology, the first preset constant C 1 It is a preset value obtained based on experience and will not be described in detail here.

[0063] As an implementation mode of the present invention, the deviation influence coefficient is obtained by the formula:

[0064]

[0065] Calculate the deviation influence coefficient δ P ;

[0066] Among them, t a is the evaporator opening time; t b is the current time; T f (t) is the temperature variation curve of the real-time temperature of the sewage in the inlet pipe from the time when the evaporator is turned on to the current time; T 0 (t) is the preset temperature variation curve of the sewage in the inlet pipe over time; C f (t) is the curve of the real-time moisture content of the sewage in the water inlet pipe from the time when the evaporator is turned on to the current time; C 0 (t) is the curve of the preset water content of the sewage in the inlet pipe changing with time; γ 1 is the first weight coefficient; γ 2 is the second weight coefficient; C 2 is the second preset constant; C 3 is the third preset constant; ε is the unit-removing coefficient;

[0067] Through the above technical solution, this embodiment The accumulated actual temperature of sewage in the water inlet pipe from the time the evaporator is turned on to the current time; The accumulated value of the preset temperature of the sewage in the water inlet pipe from the time when the evaporator is turned on to the current time; It is the difference between the actual temperature accumulation of sewage in the inlet pipe and the preset temperature accumulation of sewage in the inlet pipe; When the temperature of the sewage entering the water inlet pipe is low, it needs to absorb more heat for evaporation. After entering the evaporator, the evaporation amount of the sewage at the actual temperature is smaller than the evaporation amount of the sewage at the preset temperature. The deviation influence coefficient δ P decrease; when When , it means that the temperature of the sewage entering the water inlet pipe is higher, and it absorbs less heat for evaporation. Therefore, after entering the evaporator, the evaporation amount of the sewage at the actual temperature is greater than the evaporation amount of the sewage at the preset temperature; the deviation influence coefficient δ P Increase; The accumulated amount of actual water content of sewage in the inlet pipe from the time the evaporator is turned on to the current time; The preset accumulated moisture content of sewage in the water inlet pipe from the time the evaporator is turned on to the current time; It is the difference between the actual accumulated water content of sewage in the inlet pipe and the preset accumulated water content of sewage in the inlet pipe; When , it means that the water content of the sewage entering the water inlet pipe is low, and the number of water molecules on the surface of the liquid is relatively small. Under the same environmental conditions, the chance of these water molecules escaping will be reduced accordingly, resulting in the evaporation of the actual water content being smaller than the evaporation of the sewage with the preset water content. The deviation influence coefficient δ P decrease; when When , it means that the water content of the sewage entering the water inlet pipe is high, and the number of water molecules on the surface of the liquid is relatively large. Under the same environmental conditions, the chance of these water molecules escaping will increase accordingly, resulting in the evaporation of the actual water content being greater than the evaporation of the sewage with the preset water content; Deviation influence coefficient δ P Increase; the difference between the actual temperature accumulation of the sewage in the inlet pipe and the preset temperature accumulation of the sewage in the inlet pipe and The difference between the actual cumulative water content of the sewage in the inlet pipe and the preset cumulative water content of the sewage in the inlet pipe When both are 0, the deviation influence coefficient δ P is 1;

[0068] It should be noted that the first weight coefficient γ 1 , the second weight coefficient γ 2 , the second preset constant C 2 , the third preset constant C 3 The unit coefficient ε is the preset value, and the preset temperature change curve T 0 (t) and the preset moisture content versus time curve C 0 (t) is a preset curve obtained based on experience and will not be described in detail here.

[0069] As an embodiment of the present invention, the state evaluation index is expressed by the formula:

[0070]

[0071] Calculate the status assessment index R;

[0072] Where f(X) is the judgment function. When X>0, f(X)=X; when X≤0, f(X)=0; G 0 (t) is the preset gas flow rate of the steam outlet pipe versus time; S is the cross-sectional area of ​​the steam outlet pipe; G f (t) The real-time gas flow rate of the steam outlet pipe changes with time; W is the allowable error;

[0073] Through the above technical solution, this embodiment It is the preset flow accumulation of the steam outlet pipe from the time when the evaporator is turned on to the current time; It is the estimated cumulative value of the flow rate of the steam outlet pipe from the time when the evaporator is turned on to the current time under the conditions of the velocity difference curve of the difference between the real-time inlet flow rate and the preset inlet flow rate, the preset temperature change curve of the sewage in the inlet pipe over time, and the preset moisture content change curve of the sewage in the inlet pipe over time; It is the actual cumulative flow of the steam outlet pipe from the time the evaporator is turned on to the current time; is the difference between the cumulative predicted flow value and the cumulative actual flow volume, is the difference between the difference between the cumulative predicted flow value and the cumulative actual flow volume and the allowable error; X in the judgment function f(X) refers to the difference between the difference between the cumulative predicted flow value and the cumulative actual flow volume and the allowable error When it indicates that the difference between the cumulative predicted flow value and the cumulative actual flow volume does not exceed the allowable error, and the evaporator is normal, the state evaluation index R = 1; when it indicates that the difference between the cumulative predicted flow value and the cumulative actual flow volume is greater than the allowable error, the evaporation amount is insufficient, and the evaporator is abnormal; the difference between the difference between the cumulative predicted flow value and the cumulative actual flow volume and the allowable error the greater it is, the greater the state evaluation index R is, and the more serious the abnormal situation is;

[0074] It should be noted that the preset gas flow rate change curve G 0 (t) of the steam outlet pipe is obtained under the condition that the evaporator is in normal working state, the preset liquid inlet flow rate enters the water inlet pipe, and the preset temperature change curve of the sewage with time is T 0 (t), and the preset moisture content change curve of the sewage in the water inlet pipe with time is C 0 (t). The cross-sectional area S of the steam outlet pipe and the allowable error W are preset values and are obtained according to experience, which will not be elaborated here.

[0075] As an implementation manner of the present invention, the process of judging whether the evaporator is abnormal is as follows: comparing the state evaluation index R with the preset value R 1 as follows:

[0076] When R = 1, the evaporator is normal;

[0077] When 1 < R ≤ R 1 it indicates that the evaporator is slightly abnormal; a first-level warning is given;

[0078] When R 1 < R, the evaporator is seriously abnormal, and a second-level warning is given;

[0079] Through the above technical solution, in this embodiment, the state evaluation index R is compared with the preset value R 1 as follows: When it indicates that the difference between the cumulative predicted flow value and the cumulative actual flow volume does not exceed the allowable error, and the evaporator is normal, The status evaluation index R = 1; there is no abnormality in the evaporator; when 1 < R ≤ R 1 It indicates that the cumulative actual flow rate in the steam outlet pipe has not reached the cumulative estimated flow rate and the deviation between the cumulative actual flow rate and the cumulative estimated flow rate is small, with a slight abnormality, and a first-level warning is issued; when R 1 < R, it indicates that the cumulative actual flow rate in the steam outlet pipe has not reached the cumulative estimated flow rate and the deviation between the cumulative actual flow rate and the cumulative estimated flow rate is large, with a serious abnormality in the evaporator, and a second-level warning is issued;

[0080] It should be noted that the preset value R 1 is obtained based on experience and will not be elaborated here.

[0081] The above has described an embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. An industrial wastewater treatment equipment operation status diagnosis system, applied to an MVR evaporator, wherein the MVR evaporator comprises a water inlet pipe, a heat exchanger, a gas-liquid separation pipe and a steam outlet pipe connected in sequence, characterized in that: The described operating status diagnosis system includes: A monitoring module, which is used to monitor the operating status of the evaporator and obtain the monitoring data of the evaporator operation; the monitoring data includes the real-time sewage temperature in the water inlet pipe, the real-time liquid inlet flow rate, the real-time moisture content, and the real-time gas flow rate of the steam outlet pipe. An analysis module, which is used to analyze the real-time sewage temperature in the water inlet pipe, the real-time liquid inlet flow rate, the real-time moisture content, and the real-time gas flow rate of the steam outlet pipe, and judge whether the evaporator is abnormal according to the analysis results.

2. The industrial wastewater treatment equipment operation status diagnosis system according to claim 1 is characterized in that: The analysis process of the analysis module is as follows: S1: Obtain the real-time liquid inlet flow rate in the water inlet pipe through the monitoring module. S2: Compare the real-time liquid inlet flow rate with the preset liquid inlet flow rate to obtain a flow rate difference change curve of the difference between the real-time liquid inlet flow rate and the preset liquid inlet flow rate over time. S3: Analyze the flow rate difference change curve from the start of the evaporator to the current moment to obtain a flow rate difference influence coefficient. S4: Analyze the real-time sewage temperature and the real-time moisture content from the start of the evaporator to the current moment to obtain a deviation influence coefficient. S5: Analyze the real-time gas flow rate of the steam outlet pipe, the flow rate difference influence coefficient, and the deviation influence coefficient from the start of the evaporator to the current moment to obtain a status evaluation index. S6: Analyze the status evaluation index to judge whether the evaporator is abnormal.

3. The industrial wastewater treatment equipment operation status diagnosis system according to claim 2 is characterized in that: The judgment results of whether the evaporator is abnormal include: no abnormality, slight abnormality, and serious abnormality.

4. The industrial wastewater treatment equipment operation status diagnosis system according to claim 3 is characterized in that: The process of obtaining the flow rate difference influence coefficient includes: S10: Analyze the flow rate difference change curve from the start of the evaporator to the current moment to obtain multiple time periods with positive flow rate differences and multiple time periods with negative flow rate differences from the start of the evaporator to the current moment. S20: Calculate the flow rate difference influence coefficient through a preset analysis formula.

5. The industrial wastewater treatment equipment operation status diagnosis system according to claim 4, characterized in that: The preset analysis formula is: Among them, δ C V is the velocity difference influence coefficient; c (t) is the velocity difference change curve; N is the number of time periods in which the velocity difference is negative from the start of the evaporator to the current moment, n∈N; M is the number of time periods in which the velocity difference is positive from the start of the evaporator to the current moment, m∈M; t 1n The starting time of the nth time period in which the flow rate difference is negative from the start of the evaporator to the current moment; t 2n The end time of the time period from the start of the evaporator to the current moment when the nth flow rate difference is negative; t 1m The starting time of the mth time period with a positive flow rate difference from the start of the evaporator to the current moment; t 2m It is the end time of the time period in which the mth flow rate difference is a positive number from the start of the evaporator to the current moment; C1 is the first preset constant.

6. The industrial wastewater treatment equipment operation status diagnosis system according to claim 5, characterized in that: The deviation influence coefficient is obtained through the formula: Calculate the deviation influence coefficient δ P ; Among them, t a is the evaporator opening time; t b is the current time; T f (t) is the temperature variation curve of the real-time temperature of the sewage in the inlet pipe from the time when the evaporator is turned on to the current time; T0(t) is the temperature variation curve of the preset temperature of the sewage in the inlet pipe over time; C f (t) is the moisture content change curve of the real-time moisture content of the sewage in the inlet pipe from the time the evaporator is turned on to the current time; C0(t) is the preset moisture content change curve of the sewage in the inlet pipe; γ1 is the first weight coefficient; γ2 is the second weight coefficient; C2 is the second preset constant; C3 is the third preset constant; ε is the unit-removing coefficient.

7. The industrial wastewater treatment equipment operation status diagnosis system according to claim 6, characterized in that: The status evaluation index is obtained through the formula: Calculate the status evaluation index R. Wherein, f(X) is the judgment function, when X>0, f(X)=X; when X≤0, f(X)=0; G0(t) is the preset gas flow rate of the steam outlet pipe versus time curve; S is the cross-sectional area of ​​the steam outlet pipe; G f (t) The real-time gas flow rate of the steam outlet pipe is a curve showing the change of gas flow rate over time; W is the allowable error.

8. The industrial wastewater treatment equipment operation status diagnosis system according to claim 7, characterized in that: The judgment process of whether the evaporator is abnormal is: Compare the status evaluation index R with the preset value R1: When R = 1, the evaporator has no abnormality. When 1 < R ≤ R1, the evaporator has a slight abnormality. Conduct a first-level early warning. When R1 < R, the evaporator has a serious abnormality and a second-level early warning is conducted.

Images