A method for treating lubricating oil-containing regeneration wastewater based on real-time monitoring

Abstract

The invention relates to the technical field of wastewater treatment, and in particular to a method for treating lubricating oil-containing regeneration wastewater based on real-time monitoring, comprising: an oil removal process, a filtering process, a mixing process, an ultrafiltration process, a high-temperature cracking process, an air flotation process, a filter press process, and a Fenton process; in the oil removal process, real-time monitoring of the oil removal is performed, comprising: real-time monitoring of the oil pollution concentration in the oil removal process, and outputting a real-time oil removal energy efficiency value; analyzing the real-time oil removal energy efficiency value, and outputting an oil removal process analysis value; if the real-time oil removal energy efficiency value is greater than or equal to an oil removal process evaluation threshold, generating an oil removal process unqualified signal; analyzing based on the real-time oil removal energy efficiency value, and outputting a factor evaluation value, and if the real-time oil removal energy efficiency value is less than the factor evaluation threshold, generating a flow rate high influence degree signal; based on a two-dimensional model of wastewater flow rate, regulating the inlet flow rate of the oil remover; the invention uses a dual model of wastewater flow rate and oil removal energy efficiency to perform more accurate analysis and judgment, and then performs corresponding processing according to the judged results.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a method for treating lubricating oil-containing regeneration wastewater based on real-time monitoring. Background Art

[0002] The use of machinery, vehicles and ship tools has greatly increased, and lubricating oil is an essential material in their use. However, after long-term use, lubricating oil will deteriorate and its performance index will decrease, and it is necessary to replace the lubricating oil. Due to people's lack of correct understanding of lubricating oil and careless operation during replacement, the loss of lubricating oil causes pollution of surrounding water bodies;

[0003] Chinese patent CN116253479A discloses a method for treating lubricating oil-containing regeneration wastewater, including oil removal process, filtration process, mixing process, ultrafiltration process, high temperature cracking process, air flotation process, filter press process, and Fenton process;

[0004] In the existing lubricating oil regeneration wastewater treatment process, the use of activated sludge mixed with oily wastewater greatly improves the filtration effect of the ultrafiltration process, while effectively reducing membrane pollution. At the same time, the high-temperature cracking process is used to crack the sludge, which promotes the collision of oil droplets in the water to form large oil droplets. However, in the wastewater treatment process, especially in the oil removal process, the oil removal process cannot be effectively and accurately monitored in a timely manner, and the oil removal effect will be poor during monitoring. The oil removal process cannot be adjusted in time to make the wastewater treatment process quickly return to normal. Therefore, when treating lubricating oil regeneration wastewater, there is a lack of efficient monitoring capabilities. Summary of the invention

[0005] The purpose of the present invention is to provide a method for treating lubricating oil-containing regeneration wastewater based on real-time monitoring. The technical problem solved by the present invention is that in the wastewater treatment process, especially in the oil removal process, the oil removal process cannot be monitored efficiently and accurately in a timely manner, and the oil removal effect is poor during monitoring, and the oil removal process cannot be adjusted in time to make the wastewater treatment process quickly return to normal.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A method for treating lubricating oil-containing regeneration wastewater based on real-time monitoring includes the following steps: oil removal process, filtration process, mixing process, ultrafiltration process, high-temperature cracking process, flotation process, filter pressing process, and Fenton process; in the oil removal process, the oil removal is monitored in real time, and the monitoring process includes the following steps:

[0008] Step 1: Real-time monitoring of the oil concentration in the oil removal process, and output of the real-time oil removal energy efficiency value;

[0009] Step 2: Set the monitoring cycle, analyze the real-time oil removal energy efficiency value, and output the oil removal process analysis value;

[0010] Step 3: The oil removal process analysis values ​​obtained during the monitoring period are summed to obtain a total oil removal process analysis value. If the total oil removal process analysis value is greater than or equal to the total oil removal process analysis threshold, an oil removal process failure signal is generated;

[0011] Step 4: Based on the unqualified signal of the oil removal process, the real-time oil removal energy efficiency value is analyzed, and the factor evaluation value is output and compared with the factor evaluation threshold. If the factor evaluation value is less than the factor evaluation threshold, a high flow velocity influence signal is generated;

[0012] Step 5: Based on the high velocity influence signal, the degreaser inlet flow rate is regulated according to the two-dimensional model constructed according to the wastewater flow rate.

[0013] As a further solution of the present invention: In step 1, by formula , calculate the real-time oil removal energy efficiency value Z CY ;

[0014] C1 is the oil concentration of wastewater at the inlet, and C2 is the oil concentration of wastewater at the outlet.

[0015] As a further solution of the present invention: In step 2, the oil removal process analysis value Z Fc The output process is:

[0016] The real-time oil removal energy efficiency value within the monitoring period is obtained. The two-dimensional model constructed by the real-time oil removal energy efficiency value is analyzed to obtain the inefficient time ratio and inefficient magnitude ratio, which are marked as B and B respectively. Td and B Ts , through the formula , calculate the oil removal process analysis value Z Fc , where a1 and a2 are weight ratio coefficients.

[0017] As a further solution of the present invention: the analysis process of the inefficient time ratio is:

[0018] In the two-dimensional model constructed by the real-time oil removal energy efficiency value, the area enclosed above each real-time oil removal energy efficiency curve and below the oil removal energy efficiency threshold line is obtained and marked as a low-efficiency area; the area enclosed below each real-time oil removal energy efficiency curve and above the oil removal energy efficiency threshold line is marked as a high-efficiency area;

[0019] Get the start time and end time of each inefficient area, and calculate the difference between the end time and the start time to get the inefficient time value;

[0020] Then extract the efficient areas adjacent to each inefficient area, obtain the start time and end time of the adjacent efficient areas, calculate the difference between the end time and the start time to get the adjacent efficient time value, and sum the adjacent efficient time values ​​to get the total value of the adjacent efficient time;

[0021] The inefficient time value is calculated by ratio with the total value of the adjacent efficient time to obtain the inefficient impact factor;

[0022] The inefficiency impact factor is multiplied by the inefficiency time value to obtain the inefficiency impact time value;

[0023] The inefficiency time ratio is obtained by calculating the ratio of all inefficiency impact time values ​​to the monitoring period.

[0024] As a further solution of the present invention: the analysis process of the inefficient magnitude ratio is:

[0025] Obtain the area of ​​each inefficient area and the area of ​​the efficient area, and perform sum calculation to obtain the total oil removal energy efficiency area;

[0026] Get the area of ​​each inefficient area and calculate the sum to get the total inefficient area;

[0027] The ratio of the area of ​​each inefficient region to the total oil removal energy efficiency area is calculated to obtain the inefficiency magnitude ratio.

[0028] As a further solution of the present invention: in step 4, the output process of the factor evaluation value is:

[0029] When a signal of unqualified oil removal process is obtained, a two-dimensional model constructed by the real-time oil removal energy efficiency value is obtained, and analyzed with the two-dimensional model constructed by the wastewater flow rate to generate a flow rate impact judgment signal, and then based on the flow rate impact judgment signal, the flow rate time impact value and the flow rate quality impact value are calculated, and the flow rate time impact value and the flow rate quality impact value are summed to obtain the factor evaluation value.

[0030] As a further solution of the present invention: the process of generating the flow velocity influence judgment signal is as follows:

[0031] In the two-dimensional model constructed by extracting the wastewater flow rate, the area enclosed by each real-time wastewater flow rate curve and above the wastewater flow rate threshold line is marked as an overspeed area;

[0032] Obtain the number of overspeeding areas and the number of inefficient areas, calculate the difference between the number of overspeeding areas and the number of inefficient areas, and obtain the area number difference;

[0033] If the area number difference is less than the area number difference threshold, a flow rate impact judgment signal is generated.

[0034] As a further solution of the present invention: the calculation process of the flow velocity time influence value is:

[0035] Arrange the overspeed area and the inefficient area in chronological order, obtain the overspeed time value and the inefficient time value corresponding to the overspeed area and the inefficient area with the same sequence number, compare the inefficient time value with the overspeed time value, and calculate the flow rate time ratio;

[0036] The flow rate time ratios of all serial numbers are subjected to variance calculation to obtain the flow rate time impact value.

[0037] As a further solution of the present invention: the calculation process of the flow velocity quality influence value is:

[0038] Arrange the overspeed area and the inefficient area in chronological order, obtain the maximum wastewater flow rate and the minimum oil removal energy efficiency corresponding to the overspeed area and the inefficient area with the same serial number, compare the minimum oil removal energy efficiency with the maximum wastewater flow rate, and calculate the flow rate mass ratio;

[0039] The flow rate-to-quality ratios of all serial numbers are subjected to variance calculation to obtain the flow rate-to-quality impact value.

[0040] As a further solution of the present invention: in step 5, when a high velocity influence signal is obtained, the average value of the wastewater flow rate during the monitoring period is obtained based on the two-dimensional model constructed by the wastewater flow rate, which is marked as V J , and then calculate the flow rate control proportional coefficient X through the oil removal process analysis value obtained during the monitoring period T ;

[0041] By formula , calculate the flow rate control value Z of the wastewater pump in the subsequent monitoring period Vk ;

[0042] Among them, the flow rate control proportional coefficient X T The calculation process is:

[0043] Get the oil removal process analysis value and oil removal process assessment threshold of the current monitoring cycle, and mark the oil removal process assessment threshold as Z Fcy , through the formula , calculate the flow rate control proportional coefficient X T .

[0044] Beneficial effects of the present invention:

[0045] (1) The present invention monitors the oil concentration in the oil removal process in real time and outputs a real-time oil removal energy efficiency value; sets a monitoring period, analyzes the real-time oil removal energy efficiency value, and outputs an oil removal process analysis value; performs sum calculation on the oil removal process analysis values ​​obtained in the monitoring period to obtain a total oil removal process analysis value, and then compares it with the total oil removal process analysis threshold to generate a signal of whether the oil removal process is qualified; the present invention realizes real-time monitoring of the oil removal process in the wastewater treatment process, and the monitoring method can more accurately analyze the efficiency of the oil removal work, thereby ensuring the normal operation of the treatment of lubricating oil-containing regeneration wastewater, avoiding poor oil removal effect and affecting the overall wastewater treatment efficiency;

[0046] (2) The present invention is based on the unqualified signal of the oil removal process, and then analyzes it according to the real-time oil removal energy efficiency value, outputs the factor evaluation value, and compares it with the threshold value to generate a flow rate influence degree signal; based on the high flow rate influence degree signal, the inlet flow rate of the oil remover is regulated according to the two-dimensional model constructed by the wastewater flow rate; the present invention uses the dual model of wastewater flow rate and oil removal energy efficiency to perform more accurate analysis and judgment, and then performs corresponding processing according to the results obtained by the judgment. In the case of influence, by controlling the wastewater flow rate, the problem of low efficiency of oil adsorption by lubricating oil regeneration wastewater can be effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048] Figure 1 It is a flow chart of the method for treating lubricating oil-containing regeneration wastewater of the present invention;

[0049] Figure 2 It is a flowchart of an implementation method of monitoring oil removal according to the present invention;

[0050] Figure 3 It is a flowchart of another implementation method of monitoring oil removal according to the present invention. DETAILED DESCRIPTION

[0051] 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.

[0052] Example 1

[0053] See also Figure 1 As shown, the present invention is a method for treating lubricating oil-containing regeneration wastewater based on real-time monitoring, comprising the following steps:

[0054] Step 1: Oil removal process: transport lubricating oil regeneration wastewater to the oil removal process for oil removal;

[0055] Step 2: Filtration process: The effluent from the oil removal process is transported to the grid for filtration;

[0056] Step 3: Mixing process: The effluent from the filtration process is transported to the mixing process, and activated sludge is added to the mixing process;

[0057] Step 4, ultrafiltration process: transporting the mixture uniformly mixed in the mixing process to the ultrafiltration process for ultrafiltration treatment;

[0058] Step 5: High temperature cracking process: The concentrated solution produced by the ultrafiltration process is transported to the high temperature cracking process for treatment;

[0059] Step 6: Flotation process: The mixed liquid produced by the high temperature cracking process is subjected to flotation treatment;

[0060] Step 7: Filter pressing process: The sediment produced by the flotation process is transported to the filter pressing process for treatment;

[0061] Step 8, Fenton process: conveying the effluent from the flotation process and / or the effluent from the filter press process to the Fenton process for treatment;

[0062] See also Figure 2 As shown, in the oil removal process, real-time monitoring of oil removal can, firstly, ensure the operation quality of the oil removal process, and secondly, improve the efficiency of oil removal, effectively reduce the subsequent energy consumption of wastewater treatment, and thus improve the treatment efficiency of lubricating oil-containing regeneration wastewater;

[0063] Step 1: Real-time monitoring of the oil concentration in the oil removal process, and output of the real-time oil removal energy efficiency value;

[0064] In some embodiments, sensors for monitoring lubricating oil and other oil pollution in wastewater (the sensors include ultraviolet fluorescence sensors and infrared absorption sensors) are respectively arranged at the inlet and outlet of the degreaser to detect the oil pollution concentration of wastewater at the inlet and the oil pollution concentration of wastewater at the outlet in real time, which are marked as C1 and C2 respectively. , calculate the real-time oil removal energy efficiency value Z CY ;

[0065] Step 2: Set the monitoring cycle, analyze the real-time oil removal energy efficiency value, and output the oil removal process analysis value;

[0066] In some embodiments, a monitoring period is set to obtain the real-time oil removal energy efficiency value within the monitoring period, and the inefficient time ratio and inefficient magnitude ratio are obtained through two-dimensional model analysis, which are marked as B and B respectively. Td and B Ts , through the formula , calculate the oil removal process analysis value ZFc , where a1 and a2 are weight ratio coefficients, a1+a2=1, a1 is 0.17, a2 is 0.83, and the values ​​of a1 and a2 represent the influence of the inefficient time ratio and the inefficient magnitude ratio on the oil removal process analysis value respectively;

[0067] The construction process of the two-dimensional model is as follows:

[0068] With time as the X-axis and the real-time oil removal energy efficiency value as the Y-axis, a two-dimensional coordinate system is constructed, and all the real-time oil removal energy efficiency values ​​within the monitoring period are substituted into the two-dimensional coordinate system and plotted into a curve to obtain a real-time oil removal energy efficiency curve;

[0069] In the two-dimensional coordinate system, a deoiling energy efficiency threshold line parallel to the X-axis is set, and the deoiling energy efficiency threshold is obtained by technicians in this field based on historical data statistics;

[0070] First, specifically, the analysis process of the inefficient time ratio is:

[0071] In the two-dimensional model constructed by the real-time oil removal energy efficiency value, the area enclosed above each real-time oil removal energy efficiency curve and below the oil removal energy efficiency threshold line is marked as a low-efficiency area; in the extraction two-dimensional model, the area enclosed below each real-time oil removal energy efficiency curve and above the oil removal energy efficiency threshold line is marked as a high-efficiency area;

[0072] Get the start time and end time of each inefficient area, and calculate the difference between the end time and the start time to get the inefficient time value;

[0073] Then extract the efficient areas adjacent to each inefficient area, obtain the start time and end time of the adjacent efficient areas, calculate the difference between the end time and the start time to get the adjacent efficient time value, and sum the adjacent efficient time values ​​to get the total value of the adjacent efficient time;

[0074] The inefficient time value is calculated by ratio with the total value of the adjacent efficient time to obtain the inefficient impact factor;

[0075] The inefficiency impact factor is multiplied by the inefficiency time value to obtain the inefficiency impact time value;

[0076] Calculate the ratio of all inefficiency impact time values ​​to the monitoring period to obtain the inefficiency time ratio;

[0077] Second, specifically, the analysis process of the inefficient magnitude ratio is:

[0078] Extract the area above each real-time oil removal energy efficiency curve and below the oil removal energy efficiency threshold line in the two-dimensional model, and mark it as a low-efficiency area; extract the area below each real-time oil removal energy efficiency curve and above the oil removal energy efficiency threshold line in the two-dimensional model, and mark it as a high-efficiency area;

[0079] Obtain the area of ​​each inefficient area and the area of ​​the efficient area, and perform sum calculation to obtain the total oil removal energy efficiency area;

[0080] Get the area of ​​each inefficient area and calculate the sum to get the total inefficient area;

[0081] The ratio of the area of ​​each inefficient area to the total area of ​​oil removal energy efficiency is calculated to obtain the inefficiency magnitude ratio;

[0082] Step 3: Calculate the sum of the oil removal process analysis values ​​obtained during the monitoring period to obtain the total value of the oil removal process analysis, and then compare it with the total threshold of the oil removal process analysis to generate a signal of whether the oil removal process is qualified;

[0083] The oil removal process qualification signal includes an oil removal process qualification signal or an oil removal process failure signal;

[0084] In some embodiments, the oil removal process analysis values ​​obtained during the monitoring period are obtained, and the sum is calculated to obtain the total oil removal process analysis value, and the total oil removal process analysis value is compared with the total oil removal process analysis threshold.

[0085] If the total value of the oil removal process analysis is greater than or equal to the total threshold value of the oil removal process analysis, an oil removal process failure signal is generated;

[0086] If the total value of the oil removal process analysis is less than the total threshold value of the oil removal process analysis, a qualified signal of the oil removal process is generated;

[0087] It should be noted that: the oil removal process unqualified signal means that: during the monitoring period, the oil removal process in the wastewater treatment has a long period of low energy efficiency oil removal work, which does not meet the requirements of wastewater treatment; the oil removal process qualified signal means that: during the monitoring period, the oil removal process in the wastewater treatment does not have a long period of low energy efficiency oil removal work, which meets the requirements of wastewater treatment; when the oil removal process qualified signal is obtained, the current oil removal process is maintained and the wastewater is continuously treated;

[0088] The technical solution of the embodiment of the present invention is as follows: real-time monitoring of the oil concentration in the oil removal process, and outputting a real-time oil removal energy efficiency value; setting a monitoring period, analyzing the real-time oil removal energy efficiency value, and outputting an oil removal process analysis value; performing a sum calculation on the oil removal process analysis values ​​obtained in the monitoring period to obtain a total oil removal process analysis value, and then comparing it with the total oil removal process analysis threshold to generate a signal of whether the oil removal process is qualified; the present invention realizes real-time monitoring of the oil removal process in the wastewater treatment process, and this monitoring method can more accurately analyze the efficiency of the oil removal work, thereby ensuring the normal operation of the treatment of lubricating oil-containing regeneration wastewater, avoiding poor oil removal effect, and affecting the overall efficiency of wastewater treatment.

[0089] Example 2

[0090] On the basis of Example 1, the oil removal process in the wastewater treatment process is monitored. When the oil removal effect obtained by monitoring is not good, how to timely analyze the influencing factors of the poor oil removal effect, and quickly and accurately control the oil removal process under the conditions of factor generation to ensure the normal operation of the lubricating oil regeneration wastewater treatment process is the key to achieving continuous and efficient treatment of lubricating oil regeneration wastewater;

[0091] See also Figure 3 As shown, monitoring of oil removal also includes the following steps:

[0092] Step 4: Based on the unqualified signal of the oil removal process, the real-time oil removal energy efficiency value is analyzed, the factor evaluation value is output, and compared with the threshold value to generate a flow rate influence degree signal;

[0093] The flow velocity influence degree signal includes a flow velocity influence degree low signal or a flow velocity influence degree high signal;

[0094] In some embodiments, when an unqualified oil removal process signal is obtained, a two-dimensional model constructed by the real-time oil removal energy efficiency value is obtained, and analyzed with the two-dimensional model constructed by the wastewater flow rate to generate a flow rate influence judgment signal, and then based on the flow rate influence judgment signal, a flow rate time influence value and a flow rate quality influence value are calculated, and the flow rate time influence value and the flow rate quality influence value are summed to obtain a factor evaluation value;

[0095] comparing the factor evaluation value to a factor evaluation threshold;

[0096] If the factor evaluation value is greater than or equal to the factor evaluation threshold, a low flow velocity impact signal is generated;

[0097] If the factor evaluation value is less than the factor evaluation threshold, a high flow velocity influence signal is generated;

[0098] Among them, the construction process of the two-dimensional model constructed by the wastewater flow rate is:

[0099] With time as the X-axis and the real-time wastewater flow rate at the inlet of the degreaser as the Y-axis, a two-dimensional coordinate system is constructed, and the real-time wastewater at the inlet during the monitoring period is substituted into the two-dimensional coordinate system and plotted into a curve to obtain a real-time wastewater flow rate curve;

[0100] In the two-dimensional coordinate system, a wastewater flow rate threshold line parallel to the X-axis is set, and the wastewater flow rate threshold is obtained by technicians in this field based on historical data statistics;

[0101] Among them, the analysis process of the two-dimensional model constructed with the wastewater flow rate is:

[0102] Extract the area below each real-time wastewater flow rate curve and above the wastewater flow rate threshold line in the two-dimensional model and mark it as an overspeed area;

[0103] Obtain the number of overspeeding areas and the number of inefficient areas, calculate the difference between the number of overspeeding areas and the number of inefficient areas, and obtain the area number difference;

[0104] Compare the region number difference with the region number difference threshold;

[0105] If the difference in the number of regions is greater than or equal to the threshold value of the difference in the number of regions, a low flow velocity influence signal is generated;

[0106] If the area number difference is less than the area number difference threshold, a flow rate impact judgment signal is generated;

[0107] First, specifically, the calculation process of the flow velocity time influence value is:

[0108] Arrange the overspeed area and the inefficient area in chronological order, obtain the overspeed time value and the inefficient time value corresponding to the overspeed area and the inefficient area with the same sequence number, compare the inefficient time value with the overspeed time value, and calculate the flow rate time ratio;

[0109] The flow rate time ratios of all serial numbers are calculated for variance to obtain the flow rate time impact value;

[0110] Second, specifically, the calculation process of the flow rate quality influence value is:

[0111] Arrange the overspeed area and the inefficient area in chronological order, obtain the maximum wastewater flow rate and the minimum oil removal energy efficiency corresponding to the overspeed area and the inefficient area with the same serial number, compare the minimum oil removal energy efficiency with the maximum wastewater flow rate, and calculate the flow rate mass ratio;

[0112] The flow rate-to-quality ratios of all serial numbers are subjected to variance calculation to obtain the flow rate-to-quality impact value;

[0113] It should be noted that the low flow rate influence signal means that during the monitoring period, the flow rate of the wastewater at the inlet of the degreasing device fluctuates frequently, and during the fluctuation process, it has a more obvious impact on the degreasing effect;

[0114] The high velocity effect signal indicates that during the monitoring period, the impact of the unqualified oil removal process is not mainly caused by the wastewater flow rate. Therefore, when the low velocity effect signal is obtained, other problems of the oil remover should be troubleshooted, including whether the adsorbent material is saturated, etc.

[0115] Step 5: Based on the high velocity influence signal, the inlet flow rate of the degreaser is regulated according to the two-dimensional model constructed by the wastewater flow rate;

[0116] In some embodiments, when a high velocity influence signal is obtained, the average value of the wastewater flow rate during the monitoring period is obtained based on the two-dimensional model constructed based on the wastewater flow rate, which is marked as V J , and then calculate the flow rate control proportional coefficient X through the oil removal process analysis value obtained during the monitoring period T ;

[0117] By formula , calculate the flow rate control value Z of the wastewater pump in the subsequent monitoring period Vk ;

[0118] The calculated flow rate control value Z for the wastewater pump in the subsequent monitoring period Vk , sent to the controller of the pump body, and controlled in the subsequent monitoring cycle, the flow rate control value Z of the lubricating oil regeneration wastewater Vk To transport;

[0119] Among them, the flow rate control proportional coefficient X T The calculation process is:

[0120] Get the oil removal process analysis value and oil removal process assessment threshold of the current monitoring cycle, and mark the oil removal process assessment threshold as Z Fcy , through the formula , calculate the flow rate control proportional coefficient X T ;

[0121] The technical solution of the embodiment of the present invention is as follows: based on the signal of unqualified oil removal process, analysis is performed according to the real-time oil removal energy efficiency value, the factor evaluation value is output, and compared with the threshold value to generate a flow rate influence degree signal; based on the high flow rate influence degree signal, the degreaser inlet flow rate is regulated according to the two-dimensional model constructed by the wastewater flow rate; the present invention uses the dual model of wastewater flow rate and oil removal energy efficiency to perform more accurate analysis and judgment, and then performs corresponding processing according to the results obtained by the judgment. In the case of influence, the wastewater flow rate can be controlled to effectively solve the problem of low efficiency of oil adsorption by lubricating oil regeneration wastewater.

[0122] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0123] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for treating lubricating oil-containing regeneration wastewater based on real-time monitoring, comprising the following steps: Oil removal process, filtration process, mixing process, ultrafiltration process, high temperature cracking process, flotation process, filter press process, Fenton process; characterized in that in the oil removal process, the oil removal is monitored in real time, and the monitoring process includes the following steps: Step 1: Real-time monitoring of the oil concentration in the oil removal process, and output of the real-time oil removal energy efficiency value; Step 2: Set the monitoring cycle, analyze the real-time oil removal energy efficiency value, and output the oil removal process analysis value; Step 3: The oil removal process analysis values ​​obtained during the monitoring period are summed to obtain a total oil removal process analysis value. If the total oil removal process analysis value is greater than or equal to the total oil removal process analysis threshold, an oil removal process failure signal is generated; Step 4: Based on the unqualified signal of the oil removal process, the real-time oil removal energy efficiency value is analyzed, and the factor evaluation value is output and compared with the factor evaluation threshold. If the factor evaluation value is less than the factor evaluation threshold, a high flow velocity influence signal is generated; Step 5: Based on the high velocity influence signal, the inlet flow rate of the degreaser is regulated according to the two-dimensional model constructed by the wastewater flow rate; In step 1, by formula , calculate the real-time oil removal energy efficiency value Z CY ; C1 is the oil concentration of wastewater at the inlet, and C2 is the oil concentration of wastewater at the outlet; In step 2, the oil removal process analysis value Z Fc The output process is: The real-time oil removal energy efficiency value within the monitoring period is obtained. The two-dimensional model constructed by the real-time oil removal energy efficiency value is analyzed to obtain the inefficient time ratio and inefficient magnitude ratio, which are marked as B and B respectively. Td and B Ts , through the formula , calculate the oil removal process analysis value Z Fc , where a1 and a2 are weight ratio coefficients; a1+a2=1; The construction process of the 2D model is as follows: With time as the X-axis and the real-time oil removal energy efficiency value as the Y-axis, a two-dimensional coordinate system is constructed, and all the real-time oil removal energy efficiency values ​​within the monitoring period are substituted into the two-dimensional coordinate system and plotted into a curve to obtain a real-time oil removal energy efficiency curve; The analysis process of inefficient time ratio is: In the two-dimensional model constructed by the real-time oil removal energy efficiency value, the area enclosed above each real-time oil removal energy efficiency curve and below the oil removal energy efficiency threshold line is obtained and marked as a low-efficiency area; the area enclosed below each real-time oil removal energy efficiency curve and above the oil removal energy efficiency threshold line is marked as a high-efficiency area; Get the start time and end time of each inefficient area, and calculate the difference between the end time and the start time to get the inefficient time value; Then extract the efficient areas adjacent to each inefficient area, obtain the start time and end time of the adjacent efficient areas, calculate the difference between the end time and the start time to get the adjacent efficient time value, and sum the adjacent efficient time values ​​to get the total value of the adjacent efficient time; The inefficient time value is calculated by ratio with the total value of the adjacent efficient time to obtain the inefficient impact factor; The inefficiency impact factor is multiplied by the inefficiency time value to obtain the inefficiency impact time value; Calculate the ratio of all inefficiency impact time values ​​to the monitoring period to obtain the inefficiency time ratio; The analysis process of the inefficient magnitude ratio is: Obtain the area of ​​each inefficient area and the area of ​​the efficient area, and perform sum calculation to obtain the total oil removal energy efficiency area; Get the area of ​​each inefficient area and calculate the sum to get the total inefficient area; The ratio of the area of ​​each inefficient region to the total oil removal energy efficiency area is calculated to obtain the inefficiency magnitude ratio.

2. A method for treating lubricating oil-containing regeneration wastewater based on real-time monitoring according to claim 1, characterized in that: In step 4, the output process of the factor evaluation value is: When an unqualified oil removal process signal is obtained, a two-dimensional model constructed by the real-time oil removal energy efficiency value is obtained, and analyzed with the two-dimensional model constructed by the wastewater flow rate to generate a flow rate influence judgment signal, and then based on the flow rate influence judgment signal, the flow rate time influence value and the flow rate quality influence value are calculated, and the flow rate time influence value and the flow rate quality influence value are summed to obtain a factor evaluation value; The generation process of flow velocity impact judgment signal is as follows: In the two-dimensional model constructed by extracting the wastewater flow rate, the area enclosed by each real-time wastewater flow rate curve and above the wastewater flow rate threshold line is marked as an overspeed area; Obtain the number of overspeeding areas and the number of inefficient areas, calculate the difference between the number of overspeeding areas and the number of inefficient areas, and obtain the area number difference; If the area number difference is less than the area number difference threshold, a flow rate impact judgment signal is generated; The calculation process of the flow velocity time influence value is: Arrange the overspeed area and the inefficient area in chronological order, obtain the overspeed time value and the inefficient time value corresponding to the overspeed area and the inefficient area with the same sequence number, compare the inefficient time value with the overspeed time value, and calculate the flow rate time ratio; The flow rate time ratios of all serial numbers are calculated for variance to obtain the flow rate time impact value; The calculation process of the flow velocity quality influence value is: Arrange the overspeed area and the inefficient area in chronological order, obtain the maximum wastewater flow rate and the minimum oil removal energy efficiency corresponding to the overspeed area and the inefficient area with the same serial number, compare the minimum oil removal energy efficiency with the maximum wastewater flow rate, and calculate the flow rate mass ratio; The flow rate-to-quality ratios of all serial numbers are subjected to variance calculation to obtain the flow rate-to-quality impact value.

3. A method for treating lubricating oil-containing regeneration wastewater based on real-time monitoring according to claim 1, characterized in that: In step 5, when a high velocity influence signal is obtained, the average value of the wastewater flow rate during the monitoring period is obtained based on the two-dimensional model constructed by the wastewater flow rate, which is marked as V J , and then calculate the flow rate control proportional coefficient X through the oil removal process analysis value obtained during the monitoring period T ; By formula , calculate the flow rate control value Z of the wastewater pump in the subsequent monitoring period Vk ; Among them, the flow rate control proportional coefficient X T The calculation process is: Get the oil removal process analysis value and oil removal process assessment threshold of the current monitoring cycle, and mark the oil removal process assessment threshold as Z Fcy , through the formula , calculate the flow rate control proportional coefficient X T .

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