Oxidation fan control system

Abstract

The invention discloses an oxidation fan control system, which relates to the technical field of fan control, and comprises an information acquisition module, an information input module, an analysis and judgment module, an information output module, an emergency processing module and a feedback early warning module, the information acquisition module acquires oxidation fan data in real time; the information input module inputs collected data; the analysis and judgment module analyzes and processes the collected data to judge whether abnormal conditions exist or not; the information output module outputs an analysis and comparison result; the emergency processing module adjusts the equipment to process individual abnormal conditions; the feedback early warning module carries out feedback early warning on abnormal conditions which cannot be automatically processed through acousto-optic early warning; according to the method, the surge probability of the oxidation fan is predicted through the fluctuation data of the monitored air volume and the air pressure, the surge is predicted and prevented before the surge occurs, and the monitoring and early warning functions in the operation state of the oxidation fan are perfected in combination with the two aspects of automatic adjustment and manual troubleshooting of the oxidation fan.

Description

Technical Field

[0001] The invention relates to the technical field of fan control, in particular to an oxidation fan control system. Background Art

[0002] Oxidation fan is a very important industrial equipment. Its development history is closely linked to the overall progress of the fan industry. The technical research on oxidation fan has been developed in my country for decades. It has gone through the initial stage of imitation, technology introduction and independent research and development, and then to the modernization and diversification of technology development. In recent years, with the continuous advancement of science and technology and the improvement of environmental protection requirements, according to actual needs, the research on fireworks fans has been continuously innovated and optimized in aerodynamic performance, structural design and other aspects. The performance of oxidation fans has been greatly developed; oxidation fans can be widely used in sewage treatment, metallurgy, papermaking, pharmaceuticals, bioengineering and gas transportation and other fields. Oxidation fans mainly pressurize air or oxygen and send it into the reaction system or treatment equipment to meet specific process requirements. In the field of sewage treatment, oxidation fans are often used in aeration tanks. By injecting air into the sewage, the dissolved oxygen content in the air is increased, and the growth and reproduction of microorganisms are promoted, thereby accelerating the biological treatment process of sewage; while oxidation fans are constantly growing and developing, their application scope is also constantly expanding and deepening. With the continuous advancement of technology and the improvement of environmental protection requirements, oxidation fans will play an important role in more fields.

[0003] With the continuous advancement of oxidation blower technology, people have higher and higher performance requirements for oxidation blowers. However, during the operation of oxidation blowers, there are some faults caused by the fan's own principles or some equipment wear, which have a great impact on the operating efficiency of the entire fan and even cause safety hazards. For example, surge is an inherent characteristic of the fan, and its occurrence will seriously damage the fan body and have serious consequences. Therefore, surge must be prevented during operation. Summary of the invention

[0004] The object of the present invention is to provide an oxidation fan control system to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions: an oxidation fan control system, the system comprising: an information acquisition module, an information input module, an analysis and judgment module, an information output module, an emergency processing module and a feedback warning module;

[0006] The information acquisition module acquires data information in the oxidation blower device in real time through the information acquisition device;

[0007] The information input module inputs the collected data information through the transmission line;

[0008] The analysis and judgment module analyzes and processes the collected data information, and compares the collected information with the set standard threshold value to analyze whether there is an abnormal situation and further analyze and process the abnormal situation;

[0009] The information output module outputs the analysis and comparison results through the information transmission line;

[0010] The emergency processing module processes abnormal situations that can be automatically handled through emergency processing solutions;

[0011] The feedback warning module feeds back abnormal situations that cannot be automatically handled by the emergency plan to the staff for manual repair through sound and light warning.

[0012] Furthermore, the information acquisition module includes a temperature acquisition unit, a pressure acquisition unit and a flow acquisition unit;

[0013] The temperature acquisition unit acquires the temperature of the bearing in the oxidation fan and the temperature of the high-pressure oxygen-containing air through the set temperature sensor; the pressure acquisition unit acquires the pressure of the output air of the oxidation fan through the pressure sensor; the flow acquisition unit acquires the oxygen-containing air flow in the oxidation fan through the air flow sensor.

[0014] Furthermore, the analysis and judgment module includes a data analysis unit, a comparison and analysis unit, a fault diagnosis unit and an instruction generation unit;

[0015] The data analysis unit classifies the data information collected in real time and stores and analyzes it; the comparison and analysis unit compares the collected data with the set standard threshold to analyze whether there is any abnormality; the fault diagnosis unit further analyzes the abnormal data and its cause to determine the type and cause of the fault, and determines whether the fault can be resolved by self-adjustment of the oxidation fan; the instruction generation unit generates instructions according to the fault diagnosis results.

[0016] Further, the data analysis unit analyzes the collected data information and analyzes the probability of surge during the operation of the oxidation fan. The probability of surge is related to the fluctuation degree of air volume and the fluctuation degree of air pressure. The probability of surge is analyzed according to the changes of the two. The analysis process includes the following steps:

[0017] S4-1. The air volume value of the oxidation fan collected in real time by the air flow sensor is expressed as Q i , i represents the number of the air volume collected in real time in chronological order, and the fluctuation degree of the air volume of the oxidation fan is expressed as ΔQ i , and ΔQ i =|Q i+1 -Q i|, indicating that the air volume fluctuation value of the oxidation fan is the difference between the air volumes collected twice in a row; in the monitoring of a time period [t1, t2], the monitored air volume fluctuation value of the oxidation fan is compared with the critical value of the air volume fluctuation ΔQ max For comparison, the value is greater than ΔQ max The number of is z1 in the total number of monitored air volume fluctuation values; when the oxidation fan is in a state of large air volume fluctuation, the probability of surge increases. The influence of air volume fluctuation on the probability of surge is analyzed according to the formula:

[0018] p1=n1z1;

[0019] Among them, p1 represents the probability of surge under the influence of air volume fluctuation, and n1 represents the weight of air volume fluctuation among all factors affecting the probability of surge;

[0020] S4-2. The wind pressure data collected in real time by the pressure sensor in the oxidation fan is expressed as P j , j represents the number of the wind pressure values ​​collected in real time in chronological order, and the fluctuation degree of the wind pressure of the oxidation fan is expressed as ΔP j , and ΔP j =|P j+1 -P j |, indicating that the wind pressure fluctuation value of the oxidation fan is the difference between the wind pressures collected twice in a row; in the monitoring of a time period [t1, t2], the wind pressure fluctuation value of the oxidation fan monitored is compared with the wind pressure fluctuation critical value ΔP max For comparison, the value is greater than ΔP max The number of wind pressure fluctuations accounts for z2 of the total number of wind pressure fluctuations monitored; when the wind pressure fluctuation of the oxidation fan is large, the probability of surge increases. The influence of wind pressure fluctuation on the probability of surge is analyzed according to the formula:

[0021] p2=n2z2;

[0022] Among them, p2 represents the probability of surge under the influence of wind pressure fluctuation, and n2 represents the weight of wind pressure fluctuation among all factors affecting the probability of surge;

[0023] S4-3. The probability of surge during the operation of the oxidation fan is the sum of two influencing factors. The probability of surge is calculated according to the formula:

[0024] p=p1+p2;

[0025] Where p represents the total probability of oxidation fan surge under the influence of air volume fluctuation and air pressure fluctuation.

[0026] Further, the comparative analysis unit includes a bearing temperature analysis unit and a surge occurrence probability analysis unit;

[0027] The bearing temperature analysis unit sets the standard threshold value of the bearing temperature to T under the normal operation of the oxidation fan. max The temperature data T collected in real time by the temperature sensor is compared with the set standard threshold to analyze whether there is any abnormality in the bearing temperature of the oxidation fan during operation. The comparative analysis results are as follows:

[0028] When T≤T max When the oxidation fan bearing temperature is within the normal range, it is judged that the bearing temperature is normal;

[0029] When T>T max When the oxidation fan bearing is overheated, it is judged that the bearing temperature is abnormally high;

[0030] The surge occurrence probability analysis unit sets the maximum critical probability value of the oxidation fan surge to p max The surge occurrence probability p obtained by analyzing the collected wind volume and wind pressure is compared with the maximum critical probability value. The results of the comparative analysis are as follows:

[0031] When p≤p max When the oxidation fan is judged to have a low probability of surging,

[0032] When p>p max It is judged that the probability of oxidation fan surge is high, and the oxidation fan has abnormal air volume and air pressure.

[0033] Further, the fault diagnosis unit includes a bearing fault diagnosis unit and a surge fault diagnosis unit, which analyzes the abnormal situation, determines the cause of the fault causing the abnormal situation, and determines whether it can be solved through an emergency treatment plan through the automatic adjustment mechanism of the oxidation fan;

[0034] The bearing fault analysis unit analyzes the abnormally high temperature of the oxidation fan bearing, and further analyzes the cause of the bearing fault. If the excessively high temperature of the oxidation fan bearing is caused by too little lubricating oil in the bearing or bearing damage, the operation of the oxidation fan is stopped, and the problem of abnormally high bearing temperature is solved by manually adding bearing lubricating oil or manually replacing the damaged bearing;

[0035] The surge fault diagnosis unit analyzes the abnormal situation that the probability of surge of the oxidation fan is too high, and further analyzes the cause of the abnormal situation. The probability of surge is affected by the degree of fluctuation of air volume and air pressure. If the reason for the increased probability of surge is that the resistance of the suction port of the oxidation fan increases, resulting in insufficient air intake, thereby causing the air volume value to fluctuate, the problem of increased probability of surge is solved by adjusting the oxidation fan's own adjustment function. If the reason for the increased probability of surge is that the air branch duct of the oxidation fan is blocked, causing air pressure fluctuations, the problem of increased probability of surge is solved by stopping the fan and manually troubleshooting.

[0036] Further, the instruction generation unit generates instructions according to the fault judgment result. For abnormal situations that can be adjusted and restored by the oxidation fan's own emergency adjustment plan, an adjustment instruction is generated to control the emergency processing module to adjust the abnormal situation; for a fault that the hair care fan cannot be adjusted and restored by its own adjustment plan, an instruction is generated to control the feedback warning module to issue a warning and feedback the fault situation to the staff; the generated instructions are as follows:

[0037] According to the fault diagnosis result of the bearing temperature fault diagnosis unit, when it is detected that the bearing temperature is abnormally high, an instruction to control the red warning light to light up is generated, and at the same time, an instruction to control the buzzer alarm to sound is generated;

[0038] According to the fault diagnosis results of the surge fault diagnosis unit, when it is detected that the probability of surge occurrence is abnormally high, an adjustment instruction is first generated to control the increase in the opening and closing degree of the inlet baffle, increase the inlet air volume, and maintain the stability of the air volume and air pressure values ​​in the air duct.

[0039] Furthermore, the information output module includes an adjustment instruction output unit and an early warning instruction output unit; the adjustment instruction output unit is used to output the adjustment instruction for controlling the emergency treatment plan of the oxidation fan itself to solve the fault to the emergency treatment module;

[0040] The warning instruction output module is used to output the generated warning instruction output value to the warning feedback module, and after the emergency treatment plan is started to adjust the performance data of the oxidation fan, when it is detected that the fault has not been resolved, the warning instruction is generated and output to the warning feedback module.

[0041] Furthermore, the emergency processing module adjusts the opening and closing degree of the inlet baffle according to the generated adjustment instruction, and reduces the resistance of the air inlet by increasing the opening and closing degree of the inlet baffle, thereby increasing the incoming air volume and maintaining the stability of the air volume and air pressure in the air duct;

[0042] After increasing the inlet baffle, the oxidation fan control system continues to monitor the probability of surge occurrence of the oxidation fan in the next time period [t2, t3]. When it is monitored that the surge occurrence probability p gradually decreases in the next time period [t2, t3], it means that the oxidation fan has restored normal operation through automatic adjustment and no further adjustment is required. However, after adjustment through the emergency treatment plan, in the next time period [t2, t3], if the surge occurrence probability detected again is still abnormally high, it is fed back to the instruction generation unit to directly generate an instruction to control the yellow warning light to light up, and at the same time generate an instruction to control the buzzer to sound.

[0043] Furthermore, the early warning feedback module controls the early warning device to send out an early warning signal according to the received instruction, and controls the oxidation fan to stop running when the early warning instruction is received; the early warning feedback module feeds back the fault to be checked to the staff through the early warning signal, reminding the staff to check the fault, and the early warning types are as follows:

[0044] The red warning light lights up and the buzzer sounds, and the oxidation fan automatically stops running, indicating that it is waiting for the staff to check whether the bearing lubricant is sufficient and whether the bearing is damaged;

[0045] The yellow warning light comes on and a buzzer sounds, and the oxidation fan automatically stops running, indicating that it is waiting for staff to check the blockage of the air branch duct.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] The control system predicts the probability of surge in the oxidation fan by monitoring the fluctuation data of the air volume and air pressure of the oxidation fan. When the probability of surge in the oxidation fan exceeds the critical value, the inlet air volume is adjusted immediately to achieve the purpose of adjusting the stability of the air volume and air pressure. It can predict and prevent surge before it occurs. At the same time, the system's troubleshooting combines the self-adjustment control of the oxidation fan and manual troubleshooting, improves the monitoring and early warning functions of the oxidation fan's operating status, and the oxidation fan solves some faults through automatic control, which can reduce the workload of staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 The present invention is a schematic structural diagram of an oxidation fan control system. Figure 2 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] like Figure 1 As shown, the present invention provides an oxidation fan control system, the system includes: an information acquisition module, an information input module, an analysis and judgment module, an information output module, an emergency processing module and a feedback warning module;

[0051] The information acquisition module acquires data information in the oxidation blower device in real time through the information acquisition device;

[0052] The information input module inputs the collected data information through the transmission line;

[0053] The analysis and judgment module analyzes and processes the collected data information, and compares the collected information with the set standard threshold value to analyze whether there is an abnormal situation and further analyze and process the abnormal situation;

[0054] The information output module outputs the analysis and comparison results through the information transmission line;

[0055] The emergency processing module processes abnormal situations that can be automatically handled through emergency processing solutions;

[0056] The feedback warning module feeds back abnormal situations that cannot be automatically handled by the emergency plan to the staff for manual repair through sound and light warning.

[0057] The information acquisition module includes a temperature acquisition unit, a pressure acquisition unit and a flow acquisition unit;

[0058] The temperature acquisition unit acquires the temperature of the bearing in the oxidation fan and the temperature of the high-pressure oxygen-containing air through the set temperature sensor; the pressure acquisition unit acquires the pressure of the output air of the oxidation fan through the pressure sensor; the flow acquisition unit acquires the oxygen-containing air flow in the oxidation fan through the air flow sensor.

[0059] The analysis and judgment module includes a data analysis unit, a comparison and analysis unit, a fault diagnosis unit and an instruction generation unit;

[0060] The data analysis unit classifies the data information collected in real time and stores and analyzes it; the comparison and analysis unit compares the collected data with the set standard threshold to analyze whether there is any abnormality; the fault diagnosis unit further analyzes the abnormal data and its cause to determine the type and cause of the fault, and determines whether the fault can be resolved by self-adjustment of the oxidation fan; the instruction generation unit generates instructions according to the fault diagnosis results.

[0061] The data analysis unit analyzes the collected data information and analyzes the probability of surge occurring during the operation of the oxidation fan. The probability of surge occurring is related to the degree of fluctuation of the air volume and the degree of fluctuation of the air pressure. The probability of surge occurring is analyzed based on the changes of the two. The analysis process includes the following steps:

[0062] S4-1. The air volume value of the oxidation fan collected in real time by the air flow sensor is expressed as Q i , i represents the number of the air volume collected in real time in chronological order, and the fluctuation degree of the air volume of the oxidation fan is expressed as ΔQ i , and ΔQ i =|Q i+1 -Q i |, indicating that the air volume fluctuation value of the oxidation fan is the difference between the air volumes collected twice in a row; in the monitoring of a time period [t1, t2], the monitored air volume fluctuation value of the oxidation fan is compared with the critical value of the air volume fluctuation ΔQ max For comparison, the value is greater than ΔQ max The number of is z1 in the total number of monitored air volume fluctuation values; when the oxidation fan is in a state of large air volume fluctuation, the probability of surge increases. The influence of air volume fluctuation on the probability of surge is analyzed according to the formula:

[0063] p1=n1z1;

[0064] Among them, p1 represents the probability of surge under the influence of air volume fluctuation, and n1 represents the weight of air volume fluctuation among all factors affecting the probability of surge;

[0065] S4-2. The wind pressure data collected in real time by the pressure sensor in the oxidation fan is expressed as P j , j represents the number of the wind pressure values ​​collected in real time in chronological order, and the fluctuation degree of the wind pressure of the oxidation fan is expressed as ΔP j , and ΔP j =|P j+1 -P j |, indicating that the wind pressure fluctuation value of the oxidation fan is the difference between the wind pressures collected twice in a row; in the monitoring of a time period [t1, t2], the wind pressure fluctuation value of the oxidation fan monitored is compared with the wind pressure fluctuation critical value ΔPmax For comparison, the value is greater than ΔP max The number of wind pressure fluctuations accounts for z2 of the total number of wind pressure fluctuations monitored; when the wind pressure fluctuation of the oxidation fan is large, the probability of surge increases. The influence of wind pressure fluctuation on the probability of surge is analyzed according to the formula:

[0066] p2=n2z2;

[0067] Among them, p2 represents the probability of surge under the influence of wind pressure fluctuation, and n2 represents the weight of wind pressure fluctuation among all factors affecting the probability of surge;

[0068] S4-3. The probability of surge during the operation of the oxidation fan is the sum of two influencing factors. The probability of surge is calculated according to the formula:

[0069] p=p1+p2;

[0070] Where p represents the total probability of oxidation fan surge under the influence of air volume fluctuation and air pressure fluctuation.

[0071] The comparative analysis unit includes a bearing temperature analysis unit and a surge occurrence probability analysis unit;

[0072] The bearing temperature analysis unit sets the standard threshold value of the bearing temperature to T under the normal operation of the oxidation fan. max The temperature data T collected in real time by the temperature sensor is compared with the set standard threshold to analyze whether there is any abnormality in the bearing temperature of the oxidation fan during operation. The comparative analysis results are as follows:

[0073] When T≤T max When the oxidation fan bearing temperature is within the normal range, it is judged that the bearing temperature is normal;

[0074] When T>T max When the oxidation fan bearing is overheated, it is judged that the bearing temperature is abnormally high;

[0075] The surge occurrence probability analysis unit sets the maximum critical probability value of the oxidation fan surge to p max The surge occurrence probability p obtained by analyzing the collected wind volume and wind pressure is compared with the maximum critical probability value. The results of the comparative analysis are as follows:

[0076] When p≤p max When the oxidation fan is judged to have a low probability of surging,

[0077] When p>p max It is judged that the probability of oxidation fan surge is high, and the oxidation fan has abnormal air volume and air pressure.

[0078] The fault diagnosis unit includes a bearing fault diagnosis unit and a surge fault diagnosis unit, which analyzes the abnormal situation, determines the cause of the fault causing the abnormal situation, and determines whether it can be solved through an emergency treatment plan through the automatic adjustment mechanism of the oxidation fan;

[0079] The bearing fault analysis unit analyzes the abnormally high temperature of the oxidation fan bearing, and further analyzes the cause of the bearing fault. If the excessively high temperature of the oxidation fan bearing is caused by too little lubricating oil in the bearing or bearing damage, the operation of the oxidation fan is stopped, and the problem of abnormally high bearing temperature is solved by manually adding bearing lubricating oil or manually replacing the damaged bearing;

[0080] The surge fault diagnosis unit analyzes the abnormal situation that the probability of surge of the oxidation fan is too high, and further analyzes the cause of the abnormal situation. The probability of surge is affected by the degree of fluctuation of air volume and air pressure. If the reason for the increased probability of surge is that the resistance of the suction port of the oxidation fan increases, resulting in insufficient air intake, thereby causing the air volume value to fluctuate, the problem of increased probability of surge is solved by adjusting the oxidation fan's own adjustment function. If the reason for the increased probability of surge is that the air branch duct of the oxidation fan is blocked, causing air pressure fluctuations, the problem of increased probability of surge is solved by stopping the fan and manually troubleshooting.

[0081] The instruction generation unit generates instructions according to the fault judgment result. For abnormal situations that can be adjusted and restored by the oxidation fan's own emergency adjustment plan, an adjustment instruction is generated to control the emergency processing module to adjust the abnormal situation; for the hair care fan's fault that cannot be adjusted and restored by its own adjustment plan, an instruction is generated to control the feedback warning module to issue a warning and feedback the fault situation to the staff; the generated instructions are as follows:

[0082] According to the fault diagnosis result of the bearing temperature fault diagnosis unit, when it is detected that the bearing temperature is abnormally high, an instruction to control the red warning light to light up is generated, and at the same time, an instruction to control the buzzer alarm to sound is generated;

[0083] According to the fault diagnosis result of the surge fault diagnosis unit, when it is detected that the probability of surge occurrence is abnormally high, an adjustment instruction is first generated to control the opening and closing degree of the inlet damper to increase the inlet air volume and maintain the stability of the air volume and air pressure values ​​in the air duct;

[0084] The information output module includes an adjustment instruction output unit and an early warning instruction output unit; the adjustment instruction output unit is used to output the adjustment instruction of the emergency treatment solution for controlling the oxidation fan itself to solve the fault to the emergency treatment module;

[0085] The warning instruction output module is used to output the generated warning instruction output value to the warning feedback module, and after the emergency treatment plan is started to adjust the performance data of the oxidation fan, when it is detected that the fault has not been resolved, the warning instruction is generated and output to the warning feedback module.

[0086] The emergency processing module adjusts the opening and closing degree of the inlet baffle according to the generated adjustment instruction, and reduces the resistance of the air inlet by increasing the opening and closing degree of the inlet baffle, thereby increasing the incoming air volume and maintaining the stability of the air volume and air pressure in the air duct;

[0087] After increasing the inlet baffle, the oxidation fan control system continues to monitor the probability of surge occurrence of the oxidation fan in the next time period [t2, t3]. When it is monitored that the surge occurrence probability p gradually decreases in the next time period [t2, t3], it means that the oxidation fan has restored normal operation through automatic adjustment and no further adjustment is required. However, after adjustment through the emergency treatment plan, in the next time period [t2, t3], if the surge occurrence probability detected again is still abnormally high, it is fed back to the instruction generation unit to directly generate an instruction to control the yellow warning light to light up, and at the same time generate an instruction to control the buzzer to sound.

[0088] The early warning feedback module controls the early warning device to send out an early warning signal according to the received instruction, and controls the oxidation fan to stop running when receiving the early warning instruction; the early warning feedback module feeds back the fault to be checked to the staff through the early warning signal, reminding the staff to check the fault. The early warning types are as follows:

[0089] The red warning light lights up and the buzzer sounds, and the oxidation fan automatically stops running, indicating that it is waiting for the staff to check whether the bearing lubricant is sufficient and whether the bearing is damaged;

[0090] The yellow warning light comes on and a buzzer sounds, and the oxidation fan automatically stops running, indicating that it is waiting for staff to check the blockage of the air branch duct.

[0091] Embodiment 1:

[0092] An embodiment of selecting a surge occurrence probability detection module to perform a monitoring disease adjustment is set to monitor the oxidation fan in operation for two hours after the oxidation fan control system collects five values ​​of air volume and air pressure at different times, i.e., i=1,2,3,4,5; j=1,2,3,4,5;

[0093] The collected wind volume values ​​are: Q1 = 127m 3 , Q2=128m 3 , Q3=125m 3 , Q4=132m 3 , Q5=123m3 ;

[0094] The collected wind pressure values ​​are: P1 = 150 kPa, P2 = 154 kPa, P3 = 152 kPa, P4 = 145 kPa, P5 = 156 kPa,;

[0095] S4-1. The air volume value of the oxidation fan collected in real time by the air flow sensor is expressed as Q i , i represents the number of the air volume collected in real time in chronological order, and the fluctuation degree of the air volume of the oxidation fan is expressed as ΔQ i , and ΔQ i =|Q i+1 -Q i |, indicating that the air volume fluctuation value of the oxidation fan is the difference between the air volumes collected twice in a row, then the partial pressure fluctuation value according to the collected data is: ΔQ1=1m 3 , ΔQ2=3m 3 ,ΔQ3=7m 3 , ΔQ4=9m 3 During the two-hour monitoring, the air volume fluctuation value of the oxidation fan was compared with the critical value of air volume fluctuation ΔQ max =3m 3 For comparison, the value is greater than ΔQ max The number of the monitored air volume fluctuation degree values ​​accounts for z1=0.5; when the oxidation fan is in a state of large air volume fluctuation, the probability of surge increases. The influence of air volume fluctuation degree on the probability of surge is analyzed according to the formula:

[0096] p1=n1z1;

[0097] Among them, p1 represents the probability of surge under the influence of air volume fluctuation, n1 represents the weight of air volume fluctuation among all factors affecting the probability of surge, so n1 = 0.6; p1 = 0.3;

[0098] S4-2. The wind pressure data collected in real time by the pressure sensor in the oxidation fan is expressed as P j , j represents the number of the wind pressure values ​​collected in real time in chronological order, and the fluctuation degree of the wind pressure of the oxidation fan is expressed as ΔP j , and ΔP j =|P j+1 -P j |, indicating that the wind pressure fluctuation value of the oxidation fan is the difference between the wind pressures collected twice. According to the analysis of the collected data, the wind pressure fluctuation values ​​are ΔP1=4kPa, ΔP2=2kPa, ΔP1=7kPa, ΔP1=11kPa; in the two-hour monitoring, the wind pressure fluctuation value of the oxidation fan monitored was compared with the critical value of wind pressure fluctuation ΔPmax =4kPa for comparison, where the value is greater than ΔP max The proportion of the number of wind pressure fluctuations in the total number of monitored wind pressure fluctuation values ​​is z2 = 0.75. When the wind pressure fluctuation of the oxidation fan is large, the probability of surge increases. The influence of wind pressure fluctuation on the probability of surge is analyzed according to the formula:

[0099] p2=n2z2;

[0100] Among them, p2 represents the probability of surge under the influence of wind pressure fluctuation, and n2 = 0.4 represents the weight of wind pressure fluctuation among all factors affecting the probability of surge; p2 = 0.3 is calculated;

[0101] S4-3. The probability of surge during the operation of the oxidation fan is the sum of two influencing factors. The probability of surge is calculated according to the formula:

[0102] p = p1 + p2 = 0.6;

[0103] Where p represents the total probability of oxidation fan surge under the influence of air volume fluctuation and air pressure fluctuation.

[0104] The surge occurrence probability analysis unit sets the maximum critical probability value of the oxidation fan surge to p max =0.4, and the surge probability p=0.6 obtained by analyzing the collected wind volume and wind pressure is compared with the maximum critical probability value. The comparison and analysis show that p>p max , it is judged that the probability of oxidation fan surge is high, and the oxidation fan has abnormal air volume and air pressure;

[0105] According to the fault diagnosis results of the surge fault diagnosis unit, when it is detected that the probability of surge occurrence is abnormally high, an adjustment instruction is first generated to control the increase in the opening and closing degree of the inlet baffle, increase the inlet air volume, and maintain the stability of the air volume and air pressure values ​​in the air duct.

[0106] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An oxidation fan control system, characterized in that: The system includes: Information collection module, information input module, analysis and judgment module, information output module, emergency processing module and feedback warning module; The information acquisition module acquires data information in the oxidation blower device in real time through the information acquisition device; The information input module inputs the collected data information through the transmission line; The analysis and judgment module analyzes and processes the collected data information, and compares the collected information with the set standard threshold value to analyze whether there is an abnormal situation and further analyze and process the abnormal situation; The information output module outputs the analysis and comparison results through the information transmission line; The emergency processing module processes abnormal situations that can be automatically handled through emergency processing solutions; The feedback warning module feeds back abnormal situations that cannot be automatically handled by the emergency plan to the staff for manual repair through sound and light warning.

2. An oxidation fan control system according to claim 1, characterized in that: The information acquisition module includes a temperature acquisition unit, a pressure acquisition unit and a flow acquisition unit; The temperature acquisition unit acquires the temperature of the bearing in the oxidation fan and the temperature of the high-pressure oxygen-containing air through the set temperature sensor; the pressure acquisition unit acquires the pressure of the output air of the oxidation fan through the pressure sensor; the flow acquisition unit acquires the oxygen-containing air flow in the oxidation fan through the air flow sensor.

3. The oxidation fan control system according to claim 1, characterized in that: The analysis and judgment module includes a data analysis unit, a comparison and analysis unit, a fault diagnosis unit and an instruction generation unit; The data analysis unit classifies, stores, and analyzes the data information collected in real time; the comparison and analysis unit compares the collected data with the set standard threshold to analyze whether there is any abnormality; The fault diagnosis unit further analyzes the abnormal data and its causes to determine the type and cause of the fault, and determines whether the fault can be resolved by self-regulation of the oxidation fan; the instruction generation unit generates instructions according to the fault diagnosis results.

4. An oxidation fan control system according to claim 3, characterized in that: The data analysis unit analyzes the collected data information and analyzes the probability of surge occurring during the operation of the oxidation blower; The probability of surge is analyzed based on the changes in the degree of wind volume fluctuation and wind pressure fluctuation. The analysis process includes the following steps: S4-1. The air volume value of the oxidation fan collected in real time by the air flow sensor is expressed as Q i , i represents the number of the air volume collected in real time in chronological order, and the fluctuation degree of the air volume of the oxidation fan is expressed as ΔQ i , and ΔQ i =|Q i+1 -Q i |, indicating that the air volume fluctuation value of the oxidation fan is the difference between the air volumes collected twice in a row; in the monitoring of a time period [t1, t2], the monitored air volume fluctuation value of the oxidation fan is compared with the critical value of the air volume fluctuation ΔQ max For comparison, the value is greater than ΔQ max The number of wind volume fluctuations accounts for z1 in the total number of monitored wind volume fluctuation values; the influence of wind volume fluctuation on the probability of surge is analyzed according to the formula: p1=n1z1; Among them, p1 represents the probability of surge under the influence of air volume fluctuation, and n1 represents the weight of air volume fluctuation among all factors affecting the probability of surge; S4-2. The wind pressure data collected in real time by the pressure sensor in the oxidation fan is expressed as P j , j represents the number of the wind pressure values ​​collected in real time in chronological order, and the fluctuation degree of the wind pressure of the oxidation fan is expressed as ΔP j , and ΔP j =|P j+1 -P j |, indicating that the wind pressure fluctuation value of the oxidation fan is the difference between the wind pressures collected twice in a row; in a monitoring period [t1, t2], the wind pressure fluctuation value of the oxidation fan monitored is compared with the wind pressure fluctuation critical value ΔP max For comparison, the value is greater than ΔP max The proportion of the number of wind pressure fluctuations in the total number of monitored wind pressure fluctuations is z2; the influence of wind pressure fluctuations on the probability of surge is analyzed according to the formula: p2=n2z2; Among them, p2 represents the probability of surge under the influence of wind pressure fluctuation, and n2 represents the weight of wind pressure fluctuation among all factors affecting the probability of surge; S4-3. The probability of surge during the operation of the oxidation fan is the sum of two influencing factors. The probability of surge is calculated according to the formula: p=p1+p2; Where p represents the total probability of oxidation fan surge under the influence of air volume fluctuation and air pressure fluctuation.

5. The oxidation fan control system according to claim 3, characterized in that: The comparative analysis unit includes a bearing temperature analysis unit and a surge occurrence probability analysis unit; The bearing temperature analysis unit sets the standard threshold value of the bearing temperature to T under the normal operation of the oxidation fan. max The temperature data T collected in real time by the temperature sensor is compared with the set standard threshold to analyze whether there is any abnormality in the bearing temperature of the oxidation fan during operation. The comparative analysis results are as follows: When T≤T max When the oxidation fan bearing temperature is within the normal range, it is judged that the bearing temperature is normal; When T>T max When the oxidation fan bearing is overheated, it is judged that the bearing temperature is abnormally high; The surge occurrence probability analysis unit sets the maximum critical probability value of the oxidation fan surge to pmax, and compares the surge occurrence probability p obtained by analyzing the collected air volume and air pressure with the maximum critical probability value. The comparison and analysis results are as follows: When p≤p max When the oxidation fan is judged to have a low probability of surging; When p>p max It is judged that the probability of oxidation fan surge is high, and the oxidation fan has abnormal air volume and air pressure.

6. The oxidation fan control system according to claim 3, characterized in that: The fault diagnosis unit includes a bearing fault diagnosis unit and a surge fault diagnosis unit, which analyzes the abnormal situation, determines the cause of the fault causing the abnormal situation, and determines whether it can be solved through an emergency treatment plan through the automatic adjustment mechanism of the oxidation fan; The bearing fault analysis unit analyzes the abnormally high temperature of the oxidation fan bearing, and further analyzes the cause of the bearing fault. If the excessively high temperature of the oxidation fan bearing is caused by too little lubricating oil in the bearing or bearing damage, the operation of the oxidation fan is stopped, and the problem of abnormally high bearing temperature is solved by manually adding bearing lubricating oil or manually replacing the damaged bearing; The surge fault diagnosis unit analyzes the abnormal situation that the probability of surge of the oxidation fan is too high, and further analyzes the cause of the abnormal situation. The probability of surge is affected by the degree of fluctuation of air volume and air pressure. If the reason for the increased probability of surge is that the resistance of the suction port of the oxidation fan increases, resulting in insufficient air intake, which causes the air volume value to fluctuate, the oxidation fan's own adjustment function is adjusted to solve the problem of increased probability of surge; If the reason for the increased probability of surge is that the wind branch duct of the oxidation fan is blocked, causing the wind pressure to fluctuate, the problem of increased probability of surge can be solved by stopping the fan and then manually troubleshooting.

7. The oxidation fan control system according to claim 3, characterized in that: The instruction generation unit generates instructions according to the fault judgment result. For abnormal situations that can be adjusted and restored by the oxidation fan's own emergency adjustment plan, an adjustment instruction is generated to control the emergency processing module to adjust the abnormal situation; for faults that the oxidation fan cannot be adjusted and restored by its own adjustment plan, an instruction is generated to control the feedback warning module to issue a warning and feedback the fault situation to the staff; the generated instructions are as follows: According to the fault diagnosis result of the bearing temperature fault diagnosis unit, when it is detected that the bearing temperature is abnormally high, an instruction to control the red warning light to light up is generated, and at the same time, an instruction to control the buzzer alarm to sound is generated; According to the fault diagnosis result of the surge fault diagnosis unit, when it is detected that the probability of surge occurrence is abnormally high, an adjustment instruction is first generated to control the increase in the opening and closing degree of the inlet damper to increase the inlet air volume.

8. The oxidation fan control system according to claim 1, characterized in that: The information output module includes an adjustment instruction output unit and an early warning instruction output unit; the adjustment instruction output unit is used to output the adjustment instruction of the emergency treatment solution for controlling the oxidation fan itself to solve the fault to the emergency treatment module; The warning instruction output module is used to output the generated warning instruction output value to the warning feedback module, and after the emergency treatment plan is started to adjust the performance data of the oxidation fan, when it is detected that the fault has not been resolved, the warning instruction is generated and output to the warning feedback module.

9. The oxidation fan control system according to claim 1, characterized in that: The emergency processing module adjusts the opening and closing degree of the inlet baffle according to the generated adjustment instruction, and reduces the resistance of the air inlet by increasing the opening and closing degree of the inlet baffle, thereby increasing the incoming air volume; After increasing the inlet baffle, the oxidation fan control system continues to monitor the probability of surge occurrence of the oxidation fan in the next time period [t2, t3]. When it is detected that the surge occurrence probability p has a downward trend in the next time period [t2, t3], it means that the oxidation fan has restored normal operation through automatic adjustment and no further adjustment is required. However, after adjustment through the emergency treatment plan, if the surge occurrence probability detected again in the next time period [t2, t3] is still abnormally high, it is fed back to the instruction generation unit to directly generate an instruction to control the yellow warning light to light up, and at the same time generate an instruction to control the buzzer to sound.

10. The oxidation fan control system according to claim 1, characterized in that: The early warning feedback module controls the early warning device to send out an early warning signal according to the received instruction, and controls the oxidation fan to stop running when receiving the early warning instruction; the early warning feedback module feeds back the fault to be checked to the staff through the early warning signal, reminding the staff to check the fault. The early warning types are as follows: The red warning light lights up and the buzzer sounds, and the oxidation fan automatically stops running, indicating that it is waiting for the staff to check whether the bearing lubricant is sufficient and whether the bearing is damaged; The yellow warning light comes on and a buzzer sounds, and the oxidation fan automatically stops running, indicating that it is waiting for staff to check the blockage of the air branch duct.

Images