A device for demulsifying and removing oil from landfill leachate

Abstract

The present invention relates to the technical field of sewage treatment, and specifically to a device for demulsifying and removing oil from landfill leachate, in which an oil-water separator and a data monitoring device are configured in a mixing tank, and the device comprises: an acquisition module for acquiring rotation speed data, temperature data and an oil-water ratio detection value; a first analysis module for determining the stability maintenance degree of oil-water emulsification in the mixed liquid at the current moment according to the numerical changes of the rotation speed data and the temperature data; determining the separation effectiveness degree of the mixing process at the current moment according to the numerical changes of the oil-water ratio detection value; a second analysis module for determining the compensation coefficient of the mixing process according to the stability maintenance degree and the separation effectiveness degree; a compensation module for determining whether the mixing effect in the current mixing tank reaches a preset oil-water separation effect according to the compensation coefficient, and when the mixing effect does not reach the preset oil-water separation effect, the stirring speed and the water tank temperature are increased according to the compensation coefficient. The present invention can effectively improve the demulsification and oil removal efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a device for demulsifying and removing oil from garbage leachate. Background Art

[0002] Demulsification and oil removal refers to the process of removing oil from oil-water emulsions through a series of physical, chemical or biological methods. This process is widely used in many fields such as oil extraction, wastewater treatment, and food processing.

[0003] In the related art, demulsification and oil removal are achieved by stirring a demulsifier with landfill leachate. For example, CN219860709U discloses a demulsification and oil removal device, which achieves the effect of separating emulsified oil from water by stirring and mixing the demulsifier with the leachate.

[0004] In this way, since the oil content in the leachate is uncertain, the reaction between the leachate and the demulsifier is carried out by stirring at a fixed stirring time and stirring speed, which usually requires more time to obtain the ideal mixed oil removal effect. In other words, the mixing process cannot be effectively detected, and the treatment efficiency is poor. Summary of the invention

[0005] In order to solve the technical problem that the mixing process cannot be effectively detected in the related art and the treatment efficiency is poor, the present invention provides a landfill leachate demulsification and oil removal device, and the technical solution adopted is as follows:

[0006] The present invention proposes a device for demulsifying and removing oil from landfill leachate, comprising a stirring box, in which a demulsifying and stirring device is arranged, and an oil-water separator and a data monitoring device are arranged in the stirring box, including:

[0007] The acquisition module is used to use the data monitoring device to periodically acquire the speed data of the demulsification stirring device and the temperature data in the stirring box in the monitoring period before the current moment; and use the oil-water separator to acquire the oil-water ratio detection value at each moment;

[0008] The first analysis module is used to determine the stability of the oil-water emulsification in the mixed liquid at the current moment according to the numerical changes of the rotation speed data and the temperature data; and to determine the separation effectiveness of the mixing process at the current moment according to the numerical changes of the oil-water ratio detection value;

[0009] A second analysis module is used to determine a compensation coefficient of the stirring process according to the stability maintenance degree and the separation effectiveness degree;

[0010] The compensation module is used to determine whether the mixing effect in the current mixing tank reaches the preset oil-water separation effect according to the compensation coefficient. When the mixing effect does not reach the preset oil-water separation effect, the mixing speed and the water tank temperature are increased according to the compensation coefficient.

[0011] Further, according to the numerical changes of the rotation speed data and the temperature data, determining the stability maintenance degree of the oil-water emulsification in the mixed liquid at the current moment includes:

[0012] Determining a speed impact index of a speed change according to the numerical distribution of the speed data at all times;

[0013] Determine the temperature impact index of the temperature change according to the numerical distribution of the temperature data at all times;

[0014] The degree of stability maintenance for maintaining the stability of the oil-water emulsion is determined by combining the rotation speed influence index and the temperature influence index.

[0015] Furthermore, the method for obtaining the rotation speed influence index includes:

[0016] Calculate the speed mean and speed variance of the speed data at all times;

[0017] The ratio of the speed variance to the speed mean is normalized and used as the speed influence index.

[0018] Furthermore, the method for obtaining the temperature impact index includes:

[0019] Calculate the temperature mean and temperature variance of the temperature data at all times;

[0020] The ratio of the temperature variance to the temperature mean is normalized and used as the temperature impact index.

[0021] Furthermore, the degree of stability maintenance for maintaining the stability of the oil-water emulsion is determined by combining the rotation speed influence index and the temperature influence index, including:

[0022] The product of the rotation speed influence index and the temperature influence index is calculated, and the maximum and minimum values ​​are normalized to obtain the stability maintenance degree.

[0023] Further, according to the numerical change of the oil-water ratio detection value, the separation effectiveness of the mixing process at the current moment is determined, including:

[0024] Determine a preset detection threshold of the oil-water ratio detection value under the oil-water separation standard, and use the difference between the preset detection threshold and the oil-water ratio detection value at any time as the threshold difference at the corresponding time; normalize the mean of the threshold differences at all times to obtain the threshold influence coefficient;

[0025] According to the correlation of the numerical changes of the oil-water ratio detection values ​​at all times, the relevant influence coefficient of the oil-water ratio change is determined;

[0026] The product of the threshold influence coefficient and the correlation influence coefficient is calculated, and negative correlation mapping and normalization processing are performed to obtain the separation effectiveness.

[0027] Furthermore, according to the correlation of the numerical changes of the oil-water ratio detection values ​​at all times, the relevant influence coefficient of the oil-water ratio change is determined, including:

[0028] All moments are regarded as a moment sequence, and the oil-water ratio detection values ​​at all moments are arranged according to the time sequence to obtain a detection sequence;

[0029] Calculating the Pearson correlation coefficient between the time sequence and the detection sequence based on the Pearson correlation algorithm;

[0030] The Pearson correlation coefficient is normalized to obtain the correlation influence coefficient.

[0031] Further, according to the stability maintenance degree and the separation effectiveness degree, a compensation coefficient of the stirring process is determined, including:

[0032] The difference between the unit value 1 and the separation effectiveness is used as a separation index;

[0033] The separation index and the stability maintenance degree are respectively used as vector norms to calculate the Euclidean norm, and the Euclidean norm is normalized to serve as a compensation coefficient.

[0034] Further, determining whether the mixing effect in the current mixing box reaches the preset oil-water separation effect according to the compensation coefficient includes:

[0035] When the compensation coefficient is greater than a preset compensation threshold, it is determined that the mixing effect does not reach the preset oil-water separation effect; otherwise, it is determined that the mixing effect reaches the preset oil-water separation effect.

[0036] Further, the stirring speed and the water tank temperature are increased according to the compensation coefficient, including:

[0037] The sum of the rotation speed influence index and the temperature influence index is used as the total influence value;

[0038] The ratio of the speed influence index to the total influence value is used as the speed influence coefficient; the ratio of the temperature influence index to the total influence value is used as the temperature influence coefficient;

[0039] Calculate the product of the stirring speed at the current moment and the compensation coefficient and the speed influence coefficient as the speed increase value;

[0040] Calculate the product of the water tank temperature at the current moment and the compensation coefficient and the temperature influence coefficient as the temperature increase value;

[0041] Increase the current stirring speed and water tank temperature according to the speed increase value and temperature increase value.

[0042] The present invention has the following beneficial effects:

[0043] The present invention monitors the change in rotation speed and temperature to analyze the stability maintenance degree at the current moment, and the stability maintenance degree characterizes the strength required to maintain the stability characteristics; according to the numerical change in the oil-water ratio detection value at different moments, the separation effectiveness degree is determined, which characterizes the effectiveness index of oil-water separation at the current moment. Therefore, a compensation analysis is performed in combination with the maintenance degree and the separation effectiveness degree to determine the compensation coefficient of the stirring process, and whether stirring compensation is required is determined based on the compensation coefficient, and then the stirring speed and water tank temperature are increased to achieve stirring compensation. In the embodiment of the present invention, the control of the mixing is effectively regulated during the mixing process to improve the accuracy and reliability of the subsequent oil removal process analysis, while ensuring that the demulsifier and the leachate react fully and stably, the time consumption is reduced and the demulsification and oil removal efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 This is a structural diagram of a device for demulsifying and removing oil from landfill leachate provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation, structure, features and effects of a landfill leachate demulsification and oil removal device proposed by the present invention in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0047] Some explanations of terms in this plan:

[0048] Landfill leachate refers to liquid waste generated in landfills due to precipitation, decomposition of garbage itself and other factors. This liquid usually contains high concentrations of grease, organic matter, heavy metals, ammonia nitrogen and other pollutants, has a strong rancid odor and is highly polluting.

[0049] Demulsifiers are a class of chemicals used to destabilize emulsions, such as oil-water emulsions. They are commonly used in the fields of petroleum, chemicals, food, pharmaceuticals, and environmental protection to facilitate separation and recovery of liquid components. They facilitate oil-water phase separation by changing the surface properties of the emulsion, making the dispersion state of oil and water unstable.

[0050] Oil-water separator is an instrument used to measure the ratio of oil and water in liquid, and is widely used in environmental monitoring, wastewater treatment, and petroleum industry. It can help evaluate the separation effect of oil-water mixture, mainly including conductivity separator and optical separator.

[0051] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0052] The specific scheme of the device for demulsifying and removing oil from landfill leachate provided by the present invention is described in detail below with reference to the accompanying drawings.

[0053] See also Figure 1 , which shows a structural diagram of a landfill leachate demulsification and oil removal device provided by an embodiment of the present invention, including: an acquisition module 101, a first analysis module 102, a second analysis module 103 and a compensation module 104.

[0054] Specifically, a demulsification stirring device is provided in a stirring box, and an oil-water separator and a data monitoring device are configured in the stirring box. The demulsification stirring device can be specifically, for example, a stirrer, which stirs the landfill leachate and the demulsifier through high-speed rotation to enhance the effect of the demulsifier, while the oil-water separator mainly uses optical or conductivity principles to directly measure the ratio of oil and water, and the data monitoring device mainly detects the temperature data in the stirring box and the rotation speed data of the demulsification stirring device during the stirring process.

[0055] The specific unit of temperature data is Celsius, and the specific unit of speed data is revolutions per minute. It should be noted that the data analyzed in this solution have all been processed to eliminate the impact of dimensions. The relevant processing can be numerical extraction or normalization.

[0056] It should be noted that in order to ensure that the calculation results are meaningful, when performing fractional operations in the embodiments of the present invention, when the denominator is 0, it is necessary to add a parameter adjustment factor greater than 0 to the denominator to prevent the denominator from being 0. The value of the parameter adjustment factor is set by the implementer according to actual conditions, such as 0.01, and this application does not impose any special restrictions.

[0057] It can be understood that the overall operation scenario of the demulsification and oil removal device is to pour the leachate and demulsifier into the mixing box of the demulsification and oil removal equipment. The rotation of the demulsification and stirring equipment allows the leachate and the demulsifier to fully react. The demulsifier is used to break the emulsion stability between oil and water, so that the oil droplets can be aggregated to achieve the separation effect of oil and water in the leachate.

[0058] The demulsification and oil removal device in the related technology only considers demulsification and oil removal, but does not have a clearer analysis of the mixing state. It often requires multiple demulsifiers and more time to achieve an ideal mixed oil removal effect. Therefore, this solution effectively regulates the mixing control during the mixing process to ensure that the demulsifier and the leachate fully react, improve the accuracy and stability of the subsequent oil removal process, and at the same time reduce the relevant material consumption and time consumption, thereby improving the processing efficiency.

[0059] Among them, the acquisition module 101 is used to use the data monitoring device to periodically obtain the speed data of the demulsification stirring device and the temperature data in the stirring box in the monitoring time period before the current moment; and use the oil-water separator to obtain the oil-water ratio detection value at each moment.

[0060] In an embodiment of the present invention, the data monitoring device can be combined with a temperature sensor and a speed analyzer. The speed analyzer can be specifically connected to the demulsification stirring device to determine the speed data of the demulsification stirring device, and the temperature sensor can be placed at the bottom of the stirring box to determine the temperature data in the stirring box.

[0061] Among them, the oil-water separator mainly detects the overall oil-water ratio, that is, the ratio of oil to water in the mixed liquid.

[0062] In the embodiment of the present invention, during the operation of the demulsification and oil removal device, the temperature data and the rotation speed data can be obtained every 10 seconds, and the data within 5 minutes before the current moment can be counted for analysis of the current moment. That is, the monitoring time period is the time period corresponding to 5 minutes before the current moment.

[0063] After the data is acquired, the oil-water separation state at the current moment may be analyzed based on the acquired rotational speed data, temperature data and oil-water ratio detection value.

[0064] First, the numerical changes of the rotational speed data and the temperature data are analyzed: wherein, the first analysis module 102 is used to determine the stability maintenance degree of the oil-water emulsification in the mixed liquid at the current moment according to the numerical changes of the rotational speed data and the temperature data; and to determine the separation effectiveness of the mixing process at the current moment according to the numerical changes of the oil-water ratio detection value.

[0065] It is understandable that since the mixing box contains demulsifiers and leachate with varying concentrations, the inconsistent concentration will lead to different resistance of the liquid, which in turn affects the rotation speed. In fact, the rotation speed of the demulsifier mixing equipment is affected by the resistance and is not fixed. The greater the fluctuation, the worse the overall mixing stability.

[0066] Similarly, temperature changes are also factors that affect the overall mixing stability. The greater the temperature fluctuation, the more it will affect the mixing stability. The speed and temperature are analyzed separately.

[0067] Furthermore, in some embodiments of the present invention, the degree of stable maintenance of the oil-water emulsification in the mixed liquid at the current moment is determined based on the numerical changes in the speed data and the temperature data, including: determining the speed influence index of the speed change based on the numerical distribution of the speed data at all moments; determining the temperature influence index of the temperature change based on the numerical distribution of the temperature data at all moments; and determining the degree of stable maintenance for maintaining the stability of the oil-water emulsion by combining the speed influence index and the temperature influence index.

[0068] In the embodiment of the present invention, the rotation speed changes at all times are analyzed through the numerical distribution of the rotation speed data, so as to obtain the rotation speed influence index.

[0069] The numerical distribution can be specifically, for example, the discrete distribution of the numerical values ​​and the overall numerical size characteristics. The speed influence index characterizes the influence of the speed on the stability by numerically characterizing the influence of the speed on the stability. Therefore, the discrete distribution of the numerical values ​​and the overall numerical size characteristics can be combined to realize the analysis of the influence of the speed on the stability.

[0070] Furthermore, in some embodiments of the present invention, the method for obtaining the speed influence index includes: calculating the speed mean and speed variance of the speed data at all times; and normalizing the ratio of the speed variance to the speed mean as the speed influence index.

[0071] In the embodiment of the present invention, the overall numerical value characteristics are characterized by the rotational speed mean, and the overall discreteness characteristics are characterized by the rotational speed variance.

[0072] It can be understood that the larger the overall speed value is, the more complete the mixing is, that is, the greater the stability at the current moment is, and the higher the discreteness of the speed change is, the greater the change in liquid concentration is, and thus the stability at the current moment is relatively large. In the embodiment of the present invention, the ratio of the speed variance to the speed mean is normalized and used as the speed influence index. That is, the larger the speed influence index value is, the smaller the stability is, and the more obvious the current stability change is.

[0073] Similarly, the change of temperature data is analyzed. This analysis is similar to the analysis of rotation speed. The method for obtaining the temperature impact index includes: calculating the temperature mean and temperature variance of the temperature data at all times; and normalizing the ratio of the temperature variance to the temperature mean as the temperature impact index.

[0074] That is, the larger the value of the temperature impact index is, the smaller the stability caused by the corresponding temperature change is, and the more obvious the current stability change is.

[0075] It should be noted that the degree of stability maintenance represents the degree of adjustment required to maintain the stability of the oil-water emulsion. That is, the more unstable the current moment is, the more energy is needed to maintain the stability of the oil-water emulsion. The numerical representation of the energy required to maintain the stability of the oil-water emulsion can be called the degree of stability maintenance.

[0076] The above-mentioned speed change influence and temperature change influence are combined to analyze the overall stability maintenance. Further, in some embodiments of the present invention, the speed influence index and the temperature influence index are combined to determine the stability maintenance degree for maintaining the oil-water emulsion stability, including: calculating the product of the speed influence index and the temperature influence index, and normalizing the maximum and minimum values ​​as the stability maintenance degree.

[0077] That is, the speed influence index and the temperature influence index are directly forward fused, and the maximum and minimum value normalization is used for standardization to obtain the degree of stability maintenance. The larger the value of the degree of stability maintenance, the lower the speed of the demulsification stirring equipment in the corresponding monitoring time period, the higher the instability, and the lower the temperature in the stirring box, and the larger the temperature fluctuation. Therefore, higher energy is required to maintain the stability of the mixture in the stirring box, which can be achieved by increasing the stirring speed or by increasing the temperature. The specific analysis process can be found in the subsequent embodiments.

[0078] The separation effectiveness characterizes the separation of the mixture in the mixing box. In the embodiment of the present invention, an oil-water separator can be arranged at the bottom of the mixing box or at a lower position on the side of the mixing box to obtain the oil-water ratio detection value.

[0079] Because the oil-water ratio detection value directly affects the specific analysis of the overall oil-water separation situation, and the specific oil-water ratio of the mixture in actual operation is unclear, and oil-water separation cannot be performed based on experience, which will lead to excessive waste of resources or incomplete oil-water separation effect. Therefore, in the embodiment of the present invention, the oil-water separation state at the current moment is analyzed by the separation effectiveness.

[0080] Furthermore, in some embodiments of the present invention, the separation effectiveness of the mixing process at the current moment is determined based on the numerical change of the oil-water ratio detection value, including: determining a preset detection threshold of the oil-water ratio detection value under the oil-water separation standard, and taking the difference between the preset detection threshold and the oil-water ratio detection value at any moment as the threshold difference at the corresponding moment; normalizing the mean of the threshold differences at all moments to obtain the threshold influence coefficient; determining the relevant influence coefficient of the oil-water ratio change based on the correlation of the numerical change of the oil-water ratio detection value at all moments; calculating the product of the threshold influence coefficient and the relevant influence coefficient, negatively correlating and normalizing, and obtaining the separation effectiveness.

[0081] Among them, the threshold influence coefficient is the difference between the normal value of the oil-water ratio under the corresponding standard condition and the value of the oil-water ratio at the current moment. In the embodiment of the present invention, the standard condition of oil-water separation is that under the standard temperature and standard speed, the same proportion of landfill leachate and demulsifier corresponding to the current mixed liquid is added, and after sufficient oil-water separation, the corresponding value is finally separated. The preset detection threshold is the threshold value of the oil-water ratio detection value, which can be, for example, 10 mg / L. Of course, in some embodiments of the present invention, the specific value of the preset detection threshold can also be adjusted according to the actual detection situation, and there is no limitation on this. The standard temperature and standard speed in the embodiment of the present invention can be, for example, 25 degrees Celsius and 1000 revolutions per minute.

[0082] The threshold difference is obtained by taking the standard oil-water ratio and the difference at each moment. The larger the threshold difference is, the worse the oil-water separation effect is at the corresponding moment. The mean of the threshold difference at all moments is normalized to obtain the threshold influence coefficient. That is, the larger the value of the threshold influence coefficient is, the worse the oil-water separation effect is at all moments in the monitoring period. The oil-water ratio monitoring value in the actual mixing process does not meet the conditions for entering the next oil removal stage, and the oil-water separation effect needs to be improved in the future.

[0083] In the embodiment of the present invention, as the oil and water separate, the proportion of oil and water in the mixed liquid will gradually change in a negative correlation, that is, the proportion of oil gradually decreases, and the proportion of water gradually increases. There is a certain correlation, and a specific analysis can be performed on this correlation.

[0084] As the proportion of oil gradually decreases and the proportion of water gradually increases, that is, the correlation is negative, in order to analyze the negative correlation under normal circumstances, the Pearson correlation algorithm can be used in the embodiment of the present invention to implement the calculation.

[0085] Furthermore, in some embodiments of the present invention, the relevant influence coefficient of the oil-water ratio change is determined based on the correlation of the numerical changes of the oil-water ratio detection values ​​at all moments, including: taking all moments as a moment sequence, and arranging the oil-water ratio detection values ​​at all moments according to the time series to obtain a detection sequence; based on the Pearson correlation algorithm, calculating the Pearson correlation coefficient of the moment sequence and the detection sequence; and normalizing the Pearson correlation coefficient to obtain the relevant influence coefficient.

[0086] That is, the time series is formed into a moment series, and the oil-water ratio detection values ​​are arranged according to the time series to obtain a detection sequence. The Pearson correlation coefficient of the moment series and the detection sequence is calculated. It should be noted that since the moment series is essentially a natural number sequence composed of "1, 2, 3...", the specific analysis is still about the changes in the values ​​​​in the detection sequence.

[0087] When the obtained Pearson correlation coefficient is closer to -1, it corresponds to a higher degree of negative correlation and is more consistent with normal numerical changes. When it is closer to 0, it corresponds to a lower degree of correlation and the more it needs to improve the oil-water separation effect. Therefore, the Pearson correlation coefficient is normalized to obtain the correlation influence coefficient. The larger the value of the correlation influence coefficient, the worse the separation effectiveness, indicating that the oil-water separation effect needs to be improved.

[0088] Furthermore, in the embodiment of the present invention, the product of the threshold influence coefficient and the correlation influence coefficient is calculated, and the negative correlation mapping and normalization processing are performed to obtain the separation effectiveness. The separation effectiveness characterizes the effectiveness of oil-water separation, that is, whether the oil-water separation effect is effectively achieved. Since the larger the value of the threshold influence coefficient, the worse the oil-water separation effect at all times in the monitoring time period, and since the larger the value of the correlation influence coefficient, the worse the separation effectiveness, the threshold influence coefficient and the correlation influence coefficient are directly negatively correlated in the embodiment of the present invention.

[0089] Among them, the negative correlation mapping is a mapping relationship in which the dependent variable decreases as the independent variable increases. The independent variable in the embodiment of the present invention is the product of the threshold influence coefficient and the correlation influence coefficient, and the dependent variable is the separation effectiveness. That is, the larger the product of the threshold influence coefficient and the correlation influence coefficient is, the smaller the corresponding separation effectiveness value is. The inverse of the product value can be normalized to the maximum and minimum values ​​to obtain the separation effectiveness, or the reciprocal of the product value can be normalized to the maximum and minimum values ​​to obtain the separation effectiveness, and there is no limitation on this.

[0090] The second analysis module 103 is used to determine the compensation coefficient of the stirring process according to the stability maintenance degree and the separation effectiveness degree.

[0091] The compensation coefficient is a numerical representation of the speed and temperature compensation for the stirring process, and the compensation coefficient is used to represent the degree to which the speed and temperature need to be increased.

[0092] In the embodiment of the present invention, since the stability maintenance degree represents the degree of adjustment required to maintain the stability of the oil-water emulsion, that is, the more unstable the current moment is, the more energy is required to maintain the stability of the oil-water emulsion, the larger the value of the stability maintenance degree is, and the separation effectiveness degree represents the effectiveness of oil-water separation, that is, the numerical representation of the effective oil-water separation effect, the larger the value of the separation effectiveness degree is, the stronger the oil-water separation effect is.

[0093] Therefore, the above two data can reflect the degree of stirring compensation required at the current moment, that is, the less the current oil-water separation situation achieves the expected effect, the higher the compensation coefficient is required.

[0094] Furthermore, in some embodiments of the present invention, the compensation coefficient of the stirring process is determined according to the degree of stability maintenance and the degree of separation effectiveness, including: taking the difference between the unit value 1 and the degree of separation effectiveness as the separation index; taking the separation index and the degree of stability maintenance as vector norms, respectively, calculating the Euclidean norm, and normalizing the Euclidean norm as the compensation coefficient.

[0095] The separation index is obtained by calculating the difference between the unit value 1 and the separation effectiveness. The larger the value of the separation index, the worse the separation effectiveness, and the greater the compensation effect required. Then, the separation index and the stability maintenance degree are calculated using the Euclidean norm. The specific calculation process is to calculate the square value of the separation index and the square value of the stability maintenance degree, take the square root of the sum of the two square values ​​to obtain the Euclidean norm, and perform maximum and minimum value normalization on the Euclidean norm to obtain the compensation coefficient.

[0096] The compensation module 104 is used to determine whether the mixing effect in the current mixing tank reaches the preset oil-water separation effect according to the compensation coefficient. When the mixing effect does not reach the preset oil-water separation effect, the mixing speed and the water tank temperature are increased according to the compensation coefficient.

[0097] In the embodiment of the present invention, after the compensation coefficient is obtained, mixed compensation can be implemented according to the compensation coefficient, that is, whether stirring compensation is required and the compensation intensity of stirring compensation can be determined according to the compensation coefficient.

[0098] Furthermore, in some embodiments of the present invention, whether the mixing effect in the current mixing box reaches the preset oil-water separation effect is determined based on the compensation coefficient, including: when the compensation coefficient is greater than a preset compensation threshold, determining that the mixing effect does not reach the preset oil-water separation effect; otherwise, determining that the mixing effect reaches the preset oil-water separation effect.

[0099] Among them, the preset compensation threshold is the threshold value of the compensation coefficient. In the embodiment of the present invention, since the smaller the value of the compensation coefficient, the better the oil-water separation effect at the current moment, therefore, when it is less than a specific compensation coefficient threshold, it can be regarded as a normal oil-water separation effect. Specifically, the preset compensation threshold can be 0.5, for example, that is, when the compensation coefficient is greater than 0.5, it is determined that the mixing effect does not reach the preset oil-water separation effect. Correspondingly, when the compensation coefficient is less than or equal to 0.5, it is determined that the mixing effect reaches the preset oil-water separation effect.

[0100] Further, in some embodiments of the present invention, the stirring speed and the water tank temperature are increased according to the compensation coefficient, including: taking the sum of the speed influence index and the temperature influence index as the total influence value; taking the ratio of the speed influence index to the total influence value as the speed influence coefficient; taking the ratio of the temperature influence index to the total influence value as the temperature influence coefficient; calculating the product of the stirring speed at the current moment and the compensation coefficient and the speed influence coefficient as the speed increase value; calculating the water tank temperature at the current moment and the product of the compensation coefficient and the temperature influence coefficient as the temperature increase value; and increasing the stirring speed and the water tank temperature at the current moment according to the speed increase value and the temperature increase value.

[0101] In the embodiment of the present invention, since the compensation coefficient represents the compensation situation under the dual influence of temperature and speed, the compensation coefficient can be split according to the changes in temperature and speed, thereby obtaining two compensation methods of temperature compensation and speed compensation, namely the speed influence coefficient and the temperature influence coefficient.

[0102] In the embodiment of the present invention, the speed increase value and the temperature increase value can be directly obtained according to the speed influence coefficient and the temperature influence coefficient. The speed increase value is used to increase the stirring speed at the current moment, which can be achieved by increasing the power of the demulsification stirring equipment. The temperature increase value can be achieved by inserting a heating device, such as a heating rod, into the stirring box to increase the temperature. By increasing the stirring speed and increasing the water tank temperature in the stirring box, the reaction rate of the leachate and the demulsifier in the stirring box is increased, thereby improving the demulsification and oil removal efficiency.

[0103] The present invention monitors the change in rotation speed and temperature to analyze the stability maintenance degree at the current moment, and the stability maintenance degree characterizes the strength required to maintain the stability characteristics; according to the numerical change in the oil-water ratio detection value at different moments, the separation effectiveness degree is determined, which characterizes the effectiveness index of oil-water separation at the current moment. Therefore, a compensation analysis is performed in combination with the maintenance degree and the separation effectiveness degree to determine the compensation coefficient of the stirring process, and whether stirring compensation is required is determined based on the compensation coefficient, and then the stirring speed and water tank temperature are increased to achieve stirring compensation. In the embodiment of the present invention, the control of the mixing is effectively regulated during the mixing process to improve the accuracy and reliability of the subsequent oil removal process analysis, while ensuring that the demulsifier and the leachate react fully and stably, the time consumption is reduced and the demulsification and oil removal efficiency is improved.

[0104] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0105] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A device for demulsifying and removing oil from landfill leachate, comprising a stirring box, wherein a demulsifying and stirring device is provided in the stirring box, characterized in that: An oil-water separator and data monitoring equipment are arranged in the mixing tank, including: The acquisition module is used to use the data monitoring device to periodically acquire the speed data of the demulsification stirring device and the temperature data in the stirring box in the monitoring period before the current moment; and use the oil-water separator to acquire the oil-water ratio detection value at each moment; The first analysis module is used to determine the stability of the oil-water emulsification in the mixed liquid at the current moment according to the numerical changes of the rotation speed data and the temperature data; and to determine the separation effectiveness of the mixing process at the current moment according to the numerical changes of the oil-water ratio detection value; A second analysis module is used to determine a compensation coefficient of the stirring process according to the stability maintenance degree and the separation effectiveness degree; A compensation module, for determining whether the mixing effect in the current mixing tank reaches a preset oil-water separation effect according to the compensation coefficient, and when the mixing effect does not reach the preset oil-water separation effect, increasing the mixing speed and the water tank temperature according to the compensation coefficient; Determining the degree of stability of the oil-water emulsification in the mixed liquid at the current moment according to the numerical changes of the rotation speed data and the temperature data includes: Determining a speed impact index of a speed change according to the numerical distribution of the speed data at all times; Determine the temperature impact index of the temperature change according to the numerical distribution of the temperature data at all times; Determine the stability maintenance degree for maintaining the stability of the oil-water emulsion by combining the rotation speed influence index and the temperature influence index; Determining the separation effectiveness of the mixing process at the current moment according to the numerical change of the oil-water ratio detection value includes: Determine a preset detection threshold of the oil-water ratio detection value under the oil-water separation standard, and use the difference between the preset detection threshold and the oil-water ratio detection value at any time as the threshold difference at the corresponding time; normalize the mean of the threshold differences at all times to obtain the threshold influence coefficient; According to the correlation of the numerical changes of the oil-water ratio detection values ​​at all times, the relevant influence coefficient of the oil-water ratio change is determined; Calculating the product of the threshold influence coefficient and the correlation influence coefficient, performing negative correlation mapping and normalization processing to obtain the separation effectiveness; According to the correlation of the numerical changes of the oil-water ratio detection values ​​at all times, the relevant influence coefficients of the oil-water ratio changes are determined, including: All moments are regarded as a moment sequence, and the oil-water ratio detection values ​​at all moments are arranged according to the time sequence to obtain a detection sequence; Calculating the Pearson correlation coefficient between the time sequence and the detection sequence based on the Pearson correlation algorithm; Normalizing the Pearson correlation coefficient to obtain a correlation influence coefficient; According to the stability maintenance degree and the separation effectiveness degree, a compensation coefficient of the stirring process is determined, including: The difference between the unit value 1 and the separation effectiveness is used as a separation index; The separation index and the stability maintenance degree are respectively used as vector norms to calculate the Euclidean norm, and the Euclidean norm is normalized to serve as a compensation coefficient; The method for obtaining the rotation speed influence index includes: Calculate the speed mean and speed variance of the speed data at all times; Normalizing the ratio of the speed variance to the speed mean as the speed influence index; The method for obtaining the temperature impact index includes: Calculate the temperature mean and temperature variance of the temperature data at all times; Normalizing the ratio of the temperature variance to the temperature mean as the temperature impact index; Combining the speed influence index and the temperature influence index, determining the stability maintenance degree for maintaining the stability of the oil-water emulsion includes: Calculate the product of the speed influence index and the temperature influence index, and normalize the maximum and minimum values ​​as the stability maintenance degree; Determining whether the mixing effect in the current mixing box reaches the preset oil-water separation effect according to the compensation coefficient includes: When the compensation coefficient is greater than a preset compensation threshold, it is determined that the mixing effect does not reach the preset oil-water separation effect; otherwise, it is determined that the mixing effect reaches the preset oil-water separation effect.

2. The device for demulsifying and removing oil from landfill leachate according to claim 1, characterized in that: The stirring speed and the water tank temperature are increased according to the compensation coefficient, including: The sum of the rotation speed influence index and the temperature influence index is used as the total influence value; The ratio of the speed influence index to the total influence value is used as the speed influence coefficient; the ratio of the temperature influence index to the total influence value is used as the temperature influence coefficient; Calculate the product of the stirring speed at the current moment and the compensation coefficient and the speed influence coefficient as the speed increase value; Calculate the product of the water tank temperature at the current moment and the compensation coefficient and the temperature influence coefficient as the temperature increase value; Increase the current stirring speed and water tank temperature according to the speed increase value and temperature increase value.

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