Clean recovery method for residual fuel oil in oil tank

Abstract

The invention relates to the technical field of oil tank residual fuel oil recovery, in particular to a clean recovery method for oil tank residual fuel oil, which comprises the following steps: acquiring a key attachment area of residual fuel oil on the inner wall of an oil tank to be treated, and detecting key area characteristics and key fuel oil characteristics of the key attachment area; processing the key area features and the key fuel features to obtain an association relationship between the key area features and the key fuel features; and determining a recovery mode of residual fuel oil on the inner wall of the to-be-treated fuel tank based on an association relationship between the key region features and the key fuel oil features, and detecting the oil gas concentration in the to-be-treated fuel tank to judge whether the recovery mode of the residual fuel oil on the inner wall of the to-be-treated fuel tank needs to be adjusted or not. Residual fuel oil in the oil tank can be completely recycled, the recycling efficiency is improved, and the oil tank cannot be damaged.

Description

Technical Field

[0001] The invention relates to the technical field of residual fuel recovery in a fuel tank, and in particular to a clean recovery method for residual fuel in a fuel tank. Background Art

[0002] In the fields of modern transportation and industrial fuel storage, fuel tanks are key containers for storing fuel and are widely used in automobiles, airplanes, ships, fuel depots and other facilities. With the increasing shortage of energy resources and the continuous improvement of environmental protection requirements, how to efficiently, safely and environmentally friendly handle the residual fuel in the fuel tank has become an important technical issue.

[0003] During vehicle maintenance, scrapping, or regular cleaning and maintenance of fuel depots, a certain amount of fuel often remains in the fuel tank. Traditional treatment methods have many disadvantages. For example, the simple method of pouring oil out will not only cause a large amount of fuel waste, but also, due to the lack of effective control measures, it is easy to cause fuel leakage into the environment, causing serious pollution to the soil, water bodies, etc., and endangering the ecological balance. In addition, the direct emission of fuel volatilizes into the air, which will increase the content of volatile organic compounds (VOCs) in the air, aggravate air pollution, and under certain conditions may also cause safety accidents such as fire or explosion, threatening the safety of life and property.

[0004] Although some existing recovery methods can recover some fuel to a certain extent, they still have obvious shortcomings. For example, when using ordinary suction devices, due to the complex structure of the fuel tank, there are many corners, grooves and internal components (such as wave-breaking plates, oil pumps, etc.) that block the remaining fuel, making it difficult to completely suck out the remaining fuel. In particular, for fuel that is adsorbed on the inner wall of the fuel tank, attached to the corners due to viscosity, or trapped by the internal structure, the recovery efficiency of conventional suction methods is extremely low. At the same time, some recovery methods may cause damage to the fuel tank itself during operation, affecting its subsequent use or disposal, or fail to guarantee the quality of the recovered fuel, causing it to contain more impurities and difficult to reuse directly. Summary of the invention

[0005] To this end, the present invention provides a clean recovery method for residual fuel in a fuel tank, so as to overcome the problems of incomplete recovery of residual fuel in the fuel tank, low recovery efficiency and damage to the fuel tank in the prior art.

[0006] To achieve the above object, the present invention provides a method for cleaning and recovering residual fuel in a fuel tank, comprising:

[0007] Step S1, obtaining a key attachment area of ​​the residual fuel on the inner wall of the fuel tank to be processed, and detecting key area features and key fuel features of the key attachment area, wherein the area features include area, flatness and roughness, and the fuel features include density and viscosity of the fuel;

[0008] Step S2, processing the key area feature and the key fuel feature to obtain a correlation relationship between the key area feature and the key fuel feature;

[0009] Step S3, determining a recovery method of the residual fuel on the inner wall of the fuel tank to be processed based on the correlation between the key area feature and the key fuel feature, including a first recovery method and a second recovery method;

[0010] Wherein, under the first association relationship, a first recovery method is adopted to recover the residual fuel, and a first gas parameter of the recovered gas introduced into the recovery process is determined based on the key fuel characteristics, wherein the first gas parameter includes a first gas flow rate, a first gas temperature, and a first gas pressure;

[0011] Under the second association relationship, a second recovery method is adopted to recover the residual fuel, and a key amount of the cleaning solvent introduced is determined based on the key area characteristics, and a second gas parameter of the recovered gas introduced during the recovery process is determined, wherein the second gas parameter includes a second gas flow rate, a second gas temperature, and a second gas pressure;

[0012] Step S4, detecting the oil gas concentration in the oil tank to be processed to determine whether it is necessary to adjust the recovery method of the residual fuel on the inner wall of the oil tank to be processed.

[0013] Furthermore, in step S3, the first recycling method includes:

[0014] During the recovery process, the recovery gas is introduced into the key attachment area of ​​the oil tank to be processed with the first gas parameter, the fluidity of the residual fuel is detected, and it is determined whether the recovery process is completed based on the fluidity of the residual fuel.

[0015] Furthermore, in step S3, the second recycling method includes:

[0016] During the recovery process, a critical amount of cleaning solvent is introduced into the oil tank to be processed, and vibration stirring is performed, the recovered fuel characteristics of the key attachment area are detected, the recovered fuel characteristics are compared with the key fuel characteristics, and according to the comparison result, it is determined whether to start introducing the recovered gas into the key attachment area of ​​the oil tank to be processed with a second gas parameter, the fluidity of the residual fuel is detected, and it is determined whether the recovery process is completed according to the fluidity of the residual fuel.

[0017] Furthermore, in the step S1, it includes:

[0018] The thickness of the residual fuel adhesion layer at each position of the inner wall of the oil tank to be processed is detected, and the key adhesion area is determined according to the thickness difference of the residual fuel adhesion layer at adjacent positions of the inner wall of the oil tank to be processed.

[0019] Furthermore, the step S2 comprises:

[0020] Step S21, constructing a sample data set based on the regional characteristics of the area where the residual fuel adheres to the inner wall of the fuel tank in the historical data and the fuel characteristics;

[0021] Step S22, training the initial association relationship model according to the sample data set to obtain a target association relationship model;

[0022] Step S23, inputting the key area feature and the key fuel feature into a target association relationship model to obtain the correlation between the key area feature and the key fuel feature output by the target association relationship model;

[0023] Step S24, comparing the correlation degree with a preset correlation degree, and determining the correlation relationship between the key area feature and the key fuel feature based on the comparison result.

[0024] Furthermore, in the step S24, it includes:

[0025] If the correlation degree is less than a preset correlation degree, determining that the correlation relationship between the key area feature and the key fuel feature conforms to the first correlation relationship;

[0026] If the correlation degree is greater than or equal to the preset correlation degree, it is determined that the correlation relationship between the key area feature and the key fuel feature conforms to the second correlation relationship.

[0027] Furthermore, in the step S3, determining the first gas parameter of the recycled gas during the recycling process based on the key fuel characteristics includes:

[0028] Step S31, constructing a first parameter model based on the key fuel characteristics;

[0029] Step S32, determining a first adjustment parameter according to the first parameter model;

[0030] Step S33, determining a first gas parameter of the recycled gas introduced into the recovery process based on the first adjustment parameter.

[0031] Furthermore, in the step S3, determining the critical flow rate of the cleaning solvent based on the key area characteristics includes:

[0032] Building an inner wall cleaning model based on the area of ​​the key attachment area and the inner wall area of ​​the oil tank to be processed;

[0033] The critical flow rate of the cleaning solvent is determined according to the inner wall cleaning model.

[0034] Furthermore, in step S3, determining the second gas parameter of the recycled gas introduced into the recycling process includes:

[0035] Step S34, determining a second adjustment parameter according to the flatness and roughness of the key attachment area;

[0036] Step S35, determining a second gas parameter of the recycled gas introduced into the recovery process based on the second adjustment parameter.

[0037] Furthermore, in the step S4, it includes:

[0038] If the oil gas concentration in the oil tank to be processed is greater than the preset oil gas concentration, it is determined that the recovery method of the residual fuel on the inner wall of the oil tank to be processed needs to be adjusted.

[0039] Compared with the prior art, the beneficial effect of the present invention is that, by obtaining the key attachment area of ​​the residual fuel on the inner wall of the oil tank to be processed, the present invention can improve the efficiency of the subsequent determination of the recovery method, and can completely recover the residual fuel in the oil tank. By determining the recovery method of the residual fuel based on the key area characteristics of the key attachment area and the correlation between the key fuel characteristics, the residual fuel with different characteristics can be recovered more accurately, and the recovery efficiency of the residual fuel can be improved. By introducing the recovery gas into the interior of the oil tank to be processed for recovery, the oil tank can be avoided from being damaged. By detecting the oil and gas concentration in the oil tank to be processed to determine whether it is necessary to adjust the recovery method of the residual fuel on the inner wall of the oil tank to be processed, damage to the oil tank to be processed can be avoided, and the residual fuel in the oil tank can be completely recovered.

[0040] Furthermore, the present invention can improve the recovery efficiency and avoid damage to the oil tank to be processed by introducing the recovery gas into the key attachment area of ​​the oil tank to be processed with the first gas parameter. By detecting the fluidity of the residual fuel to determine whether the recovery process is completed, it can ensure that the residual fuel is completely recovered.

[0041] Furthermore, the present invention can dissolve the residual fuel by introducing a cleaning solvent into the oil tank to be treated and vibrating and stirring it, thereby reducing the adhesion ability of the residual fuel, and then introducing a recovery gas into the key adhesion area of ​​the oil tank to be treated with a second gas parameter, thereby improving the recovery efficiency of the residual fuel and ensuring that the residual fuel is completely recovered.

[0042] Furthermore, the present invention determines the key attachment area according to the thickness difference of the residual fuel attachment layer at adjacent positions on the inner wall of the oil tank to be processed, which can improve the efficiency and accuracy of determining the key attachment area. The residual fuel in the key attachment area is representative. By determining the subsequent processing method and corresponding parameters based on the regional characteristics and fuel characteristics corresponding to the key attachment area, the data processing amount can be reduced and the production efficiency can be improved.

[0043] Furthermore, the present invention can improve the accuracy and efficiency of determining the association relationship by constructing a target association relationship model based on the regional characteristics of the residual fuel attachment area on the inner wall of the fuel tank in historical data and the fuel characteristics to determine the association relationship between the key regional characteristics and the key fuel characteristics.

[0044] Furthermore, the correlation between the key area characteristics corresponding to the first recovery method of the present invention and the key fuel characteristics is relatively small, indicating that the residual fuel in the key attachment area of ​​the inner wall of the oil tank to be processed has little relationship with the key area characteristics. Therefore, by determining the first adjustment parameter based on the key fuel characteristics to determine the first gas parameter of the recovery gas introduced into the recovery process, it is possible to improve the recovery efficiency while ensuring complete recovery and avoid damage to the oil tank.

[0045] Furthermore, the present invention determines the critical input amount of the cleaning solvent based on the area of ​​the key attachment region and the inner wall area of ​​the oil tank to be treated, which can ensure the accuracy of the determined critical input amount of the cleaning solvent and avoid waste of resources caused by excessive cleaning solvent or incomplete recovery caused by insufficient cleaning solvent.

[0046] Furthermore, the correlation between the corresponding key area characteristics and the key fuel characteristics in the second recovery method of the present invention is relatively large, indicating that the residual fuel in the key attachment area of ​​the inner wall of the fuel tank to be processed is relatively large. Therefore, determining the second adjustment parameter according to the flatness and roughness of the key attachment area can improve the recovery efficiency and avoid damage to the fuel tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a flow chart of a method for cleaning and recovering residual fuel in a fuel tank according to an embodiment of the present invention;

[0048] Figure 2 Schematic diagram of the process of step S2 of the embodiment of the present invention;

[0049] Figure 3 A schematic diagram of a process for determining a first gas parameter according to an embodiment of the present invention;

[0050] Figure 4 A schematic diagram of a process for determining a second gas parameter according to an embodiment of the present invention;

[0051] Figure 5This is a logical judgment diagram for determining the recycling method in an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0053] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0054] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0055] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] See also Figure 1 , Figure 5 As shown, Figure 1 This is a flow chart of a method for cleaning and recovering residual fuel in a fuel tank according to an embodiment of the present invention; Figure 5 The following is a logic judgment diagram for determining a recovery method in an embodiment of the present invention. The embodiment of the present invention provides a clean recovery method for residual fuel in a fuel tank, comprising:

[0057] Step S1, obtaining a key attachment area of ​​the residual fuel on the inner wall of the fuel tank to be processed, and detecting key area features and key fuel features of the key attachment area, wherein the area features include area, flatness and roughness, and the fuel features include density and viscosity of the fuel;

[0058] Specifically, the step S1 includes:

[0059] Detecting the thickness of the residual fuel adhesion layer at various locations on the inner wall of the fuel tank to be processed;

[0060] The key attachment area is determined according to the thickness difference of the residual fuel attachment layer at adjacent positions of the inner wall of the oil tank to be processed.

[0061] It should be noted that those skilled in the art are aware that any method and device in the prior art that can detect key area characteristics and key fuel characteristics falls within the protection scope of the present invention and will not be described in detail herein.

[0062] It is understandable that the thickness of the residual fuel adhesion layer at various positions on the inner wall of the oil tank to be processed can be detected by endoscopy, ultrasonic detection, image recognition and other methods. If the difference in thickness of the residual fuel adhesion layer at adjacent positions on the inner wall of the oil tank to be processed is less than a preset difference, the surface morphology of the residual fuel at the corresponding positions is not much different. If the difference in thickness of the residual fuel adhesion layer at adjacent positions on the inner wall of the oil tank to be processed is greater than or equal to the preset difference, the surface morphology of the residual fuel at the corresponding positions is relatively different, and it is determined as a key position. The largest area surrounded by several key positions is determined as a key adhesion area. The area of ​​the inner wall of the oil tank to be processed other than the key adhesion area is a general area. It is more difficult to recover the residual fuel in the key adhesion area than to recover the residual fuel in the general area. It may be difficult to recover the residual fuel in the key adhesion area only based on the recovery method of the residual fuel in the general area. However, by determining the recovery method of the residual fuel in the key adhesion area, the residual fuel on the inner wall of the oil tank to be processed can be completely recovered.

[0063] During implementation, the actual implementers may set the preset difference based on the actual situation or the average of the thickness differences of the residual fuel adhesion layer at various locations on the inner wall of the tank to be processed that have passed the qualification test in historical data, or may calculate the average thickness of the residual fuel adhesion layer and set the preset difference to 1.1 to 1.3 times the average thickness of the residual fuel adhesion layer.

[0064] The present invention determines the key attachment area according to the thickness difference of the residual fuel attachment layer at adjacent positions of the inner wall of the oil tank to be processed, which can improve the efficiency and accuracy of determining the key attachment area. The residual fuel in the key attachment area is representative. By determining the subsequent processing method and corresponding parameters based on the regional characteristics and fuel characteristics corresponding to the key attachment area, the data processing amount can be reduced and the production efficiency can be improved.

[0065] Step S2, processing the key area feature and the key fuel feature to obtain a correlation relationship between the key area feature and the key fuel feature;

[0066] In a specific embodiment, the key area characteristics and key fuel characteristics of the key attachment area of ​​the inner wall of the fuel tank to be processed are compared with the area characteristics and fuel characteristics of the general area, and a correlation analysis is performed to construct an association relationship model, with the key area characteristics and key fuel characteristics as input and the association relationship as output, so as to determine the association relationship between the key area characteristics and the key fuel characteristics.

[0067] See also Figure 2 As shown, it is a flow chart of step S2 of an embodiment of the present invention; in another specific embodiment, specifically, step S2 includes:

[0068] Step S21, constructing a sample data set based on the regional characteristics of the area where the residual fuel adheres to the inner wall of the fuel tank in the historical data and the fuel characteristics;

[0069] Step S22, training the initial association relationship model according to the sample data set to obtain a target association relationship model;

[0070] Step S23, inputting the key area feature and the key fuel feature into a target association relationship model to obtain the correlation between the key area feature and the key fuel feature output by the target association relationship model;

[0071] Step S24, comparing the correlation degree with a preset correlation degree, and determining the correlation relationship between the key area feature and the key fuel feature based on the comparison result.

[0072] It is understandable that those skilled in the art know that any neural network model in the prior art that can determine the correlation between key area characteristics and key fuel characteristics falls within the protection scope of the present invention and will not be described in detail herein.

[0073] Specifically, in step S24, it includes:

[0074] If the correlation degree is less than a preset correlation degree, determining that the correlation relationship between the key area feature and the key fuel feature conforms to the first correlation relationship;

[0075] If the correlation degree is greater than or equal to the preset correlation degree, it is determined that the correlation relationship between the key area feature and the key fuel feature conforms to the second correlation relationship.

[0076] In practice, the implementers can set a preset correlation degree according to the actual situation or the regional characteristics of the residual fuel on the inner wall of the fuel tank that has passed the qualification test in historical data and the average value of the correlation between the fuel characteristics. Preferably, the preset correlation degree is set to 0.55-0.7, which can better distinguish the characteristics of the two recovery methods.

[0077] The present invention can improve the accuracy and efficiency of determining the association relationship by constructing a target association relationship model based on the regional characteristics of the residual fuel attachment area on the inner wall of the fuel tank in historical data and the fuel characteristics to determine the association relationship between the key regional characteristics and the key fuel characteristics.

[0078] Step S3, determining a recovery method of the residual fuel on the inner wall of the fuel tank to be processed based on the correlation between the key area feature and the key fuel feature, including a first recovery method and a second recovery method;

[0079] Wherein, under the first association relationship, a first recovery method is adopted to recover the residual fuel, and a first gas parameter of the recovered gas introduced into the recovery process is determined based on the key fuel characteristics, wherein the first gas parameter includes a first gas flow rate, a first gas temperature, and a first gas pressure;

[0080] Specifically, in step S3, the first recycling method includes:

[0081] During the recovery process, the recovery gas is introduced into the key attachment area of ​​the oil tank to be processed with the first gas parameter, the fluidity of the residual fuel is detected, and it is determined whether the recovery process is completed based on the fluidity of the residual fuel.

[0082] The present invention can improve the recovery efficiency and avoid damage to the oil tank to be processed by introducing recovery gas into the key attachment area of ​​the oil tank to be processed with the first gas parameter. By detecting the fluidity of the residual fuel to determine whether the recovery process is completed, it can ensure that the residual fuel is completely recovered.

[0083] See also Figure 3 As shown, it is a schematic diagram of a process of determining the first gas parameter in an embodiment of the present invention; specifically, in the step S3, the first gas parameter of the recycled gas introduced into the recycling process is determined based on the key fuel characteristics, including:

[0084] Step S31, constructing a first parameter model based on the key fuel characteristics;

[0085] Step S32, determining a first adjustment parameter according to the first parameter model;

[0086] Step S33, determining a first gas parameter of the recycled gas introduced into the recovery process based on the first adjustment parameter.

[0087] It is understandable that accurate three-dimensional geometric modeling can be performed based on the key area characteristics of the key attachment area, and then the model can be imported into the finite element analysis software, and the key fuel characteristics can be input into the finite element model as fuel material properties. At the same time, the elastic modulus, Poisson's ratio and other mechanical properties of other solid structural materials (such as fuel tank material, pipeline material, etc.) are defined, and the geometric model is meshed. A finer mesh is used in the key attachment area to improve the analysis accuracy, and a coarser mesh can be appropriately used in places far away from the key attachment area and where the fuel characteristics are not obvious, so as to balance the calculation cost and accuracy. A no-slip boundary condition is set for the inner wall of the fuel tank (that is, the fuel velocity on the wall is zero), and the finite element solution calculation process is started according to the finite element solver. The process monitors the changes of various parameters in the solution process to perform finite element analysis simulation on the fuel density and fuel viscosity of the key attachment area, extracts the fuel density and fuel viscosity data of the key attachment area from the finite element analysis results, organizes and preprocesses the extracted data, checks the rationality of the data, removes obviously erroneous or abnormal data points, and can visualize the data (such as drawing curves of density and viscosity changes over time or working conditions) to intuitively observe the distribution characteristics and trends of the data, establish a multivariate linear regression model of fuel density and fuel viscosity, calculate the regression coefficient by the least squares method, and take the first adjustment parameter as the goal, determine the relationship between the first adjustment parameter and the regression model of fuel density and fuel viscosity, and construct the first parameter model.

[0088] In implementation, the first gas flow rate is determined according to the product of the first adjustment parameter and the standard gas flow rate, the first gas temperature is determined according to the first adjustment parameter and the standard gas temperature, and the first gas pressure is determined according to the product of the first adjustment parameter and the standard gas pressure.

[0089] In actual application scenarios, actual implementers can set the standard gas flow rate, standard gas temperature and standard gas pressure respectively according to actual conditions or based on the average gas flow rate, average gas temperature and average gas pressure of the recycled gas that has passed the qualification test in historical data. Preferably, the standard gas flow rate value range is set to 10m / s~15m / s, the standard gas temperature value range is set to 30℃~40℃, and the standard gas pressure value range is set to 0.2MPa~0.5MPa.

[0090] The correlation between the key area characteristics corresponding to the first recovery mode of the present invention and the key fuel characteristics is relatively small, indicating that the residual fuel in the key attachment area of ​​the inner wall of the oil tank to be processed has a relatively small relationship with the key area characteristics. The gas flow rate of the recycled gas is the first gas flow rate, which can effectively remove the fuel and avoid damage to the internal structure of the oil tank due to excessive flow rate. The gas temperature of the recycled gas is the first gas temperature. The high-temperature gas can reduce the viscosity of the fuel, making the fuel easier to be washed and evaporated. However, the temperature cannot be too high. On the one hand, it is considered to be a safety factor to avoid causing fuel combustion; on the other hand, too high a temperature may have an adverse effect on the fuel tank material, such as causing deformation of the plastic fuel tank or damage to the coating of the metal fuel tank. The gas pressure of the recycled gas is the first gas pressure. Different fuel tanks have different pressure limits. In the process of cleaning and recovering the residual fuel, it is necessary to ensure that the pressure of the compressed gas does not exceed the pressure limit of the fuel tank, otherwise it will cause the fuel tank to rupture, causing serious safety accidents such as fuel leakage. Therefore, by determining the first adjustment parameter based on the key fuel characteristics to determine the first gas parameter of the recovered gas introduced during the recovery process, it is possible to improve the recovery efficiency while ensuring complete recovery and avoid damage to the fuel tank.

[0091] Under the second association relationship, a second recovery method is adopted to recover the residual fuel, and a key amount of the cleaning solvent introduced is determined based on the key area characteristics, and a second gas parameter of the recovered gas introduced during the recovery process is determined, wherein the second gas parameter includes a second gas flow rate, a second gas temperature, and a second gas pressure;

[0092] Specifically, in step S3, the second recycling method includes:

[0093] During the recovery process, a critical amount of cleaning solvent is introduced into the oil tank to be processed, and vibration stirring is performed, the recovered fuel characteristics of the key attachment area are detected, the recovered fuel characteristics are compared with the key fuel characteristics, and according to the comparison result, it is determined whether to start introducing the recovered gas into the key attachment area of ​​the oil tank to be processed with a second gas parameter, the fluidity of the residual fuel is detected, and it is determined whether the recovery process is completed according to the fluidity of the residual fuel.

[0094] During implementation, if the recovery density of the residual fuel in the key attachment area is less than the critical density of the residual fuel in the key attachment area, and the recovery viscosity of the residual fuel in the key attachment area is less than the critical viscosity of the residual fuel in the key attachment area, it is determined to start introducing the recovery gas into the key attachment area of ​​the tank to be treated with the second gas parameter.

[0095] The present invention can dissolve the residual fuel by introducing a cleaning solvent into the oil tank to be treated and performing vibration stirring, thereby reducing the adhesion ability of the residual fuel. Then, recovery gas is introduced into the key adhesion area of ​​the oil tank to be treated with a second gas parameter, thereby improving the recovery efficiency of the residual fuel and ensuring that the residual fuel is completely recovered.

[0096] Specifically, in step S3, determining the critical flow rate of the cleaning solvent based on the key area characteristics includes:

[0097] Building an inner wall cleaning model based on the area of ​​the key attachment area and the inner wall area of ​​the oil tank to be processed;

[0098] The critical flow rate of the cleaning solvent is determined according to the inner wall cleaning model.

[0099] In a specific embodiment, a number of training samples can be generated based on the area of ​​several fuel attachment regions in historical data and the inner wall area of ​​the corresponding fuel tank, and the corresponding cleaning solvent flow rate is used as a sample label to obtain a training sample set. The initial neural network model is trained according to the training sample set to obtain an inner wall cleaning model, and the area of ​​the key attachment region and the inner wall area of ​​the fuel tank to be processed are input into the inner wall cleaning model to obtain the key flow rate of the cleaning solvent output by the inner wall cleaning model.

[0100] It is understandable that those skilled in the art know that any neural network model in the prior art that can be trained to obtain the cleaning solvent intake amount falls within the protection scope of the present invention and will not be described in detail here.

[0101] The present invention determines the critical input amount of the cleaning solvent according to the area of ​​the key attachment region and the inner wall area of ​​the oil tank to be treated, which can ensure the accuracy of the determined critical input amount of the cleaning solvent and avoid resource waste caused by excessive cleaning solvent or incomplete recovery caused by insufficient cleaning solvent.

[0102] See also Figure 4 As shown, it is a schematic diagram of a process for determining the second gas parameter in an embodiment of the present invention; specifically, in step S3, determining the second gas parameter of the recycled gas introduced into the recycling process includes:

[0103] Step S34, determining a second adjustment parameter according to the flatness and roughness of the key attachment area;

[0104] Step S35, determining a second gas parameter of the recycled gas introduced into the recovery process based on the second adjustment parameter.

[0105] In implementation, a first ratio is determined based on the ratio of a key flatness of a key attachment area to a preset flatness, a second ratio is determined based on the ratio of a key roughness of the key attachment area to a preset roughness, a second adjustment parameter is determined based on the product of the first ratio and the second ratio, a second gas flow rate is determined based on the product of the second adjustment parameter and a standard gas flow rate, a second gas temperature is determined based on the second adjustment parameter and a standard gas temperature, and a second gas pressure is determined based on the product of the second adjustment parameter and a standard gas pressure.

[0106] The correlation between the corresponding key area characteristics and the key fuel characteristics in the second recovery method of the present invention is relatively large, indicating that the residual fuel in the key attachment area of ​​the inner wall of the fuel tank to be processed is relatively large. Therefore, determining the second adjustment parameter according to the flatness and roughness of the key attachment area can improve the recovery efficiency and avoid damage to the fuel tank.

[0107] Step S4, detecting the oil gas concentration in the oil tank to be processed to determine whether it is necessary to adjust the recovery method of the residual fuel on the inner wall of the oil tank to be processed.

[0108] Specifically, in step S4, it includes:

[0109] If the oil gas concentration in the oil tank to be processed is greater than the preset oil gas concentration, it is determined that the recovery method of the residual fuel on the inner wall of the oil tank to be processed needs to be adjusted.

[0110] In a specific embodiment, if the oil and gas concentration in the oil tank to be processed is greater than the preset oil and gas concentration, it is necessary to reduce the first gas parameter / second gas parameter corresponding to the recovery method of the residual fuel on the inner wall of the oil tank to be processed, for example: the oil and gas concentration difference can be calculated according to the oil and gas concentration in the oil tank to be processed and the preset oil and gas concentration, and then the third adjustment parameter is determined according to the ratio of the oil and gas concentration difference to the preset oil and gas concentration, and the reduction range of the first gas parameter and the second gas parameter is determined according to the third adjustment parameter, wherein the reduction range of the first gas flow rate is determined according to the product of the third adjustment parameter and the first gas flow rate, the reduction range of the first gas temperature is determined according to the product of the third adjustment parameter and the first gas temperature, the reduction range of the first gas pressure is determined according to the product of the third adjustment parameter and the first gas pressure, the reduction range of the second gas flow rate is determined according to the product of the third adjustment parameter and the second gas flow rate, the reduction range of the second gas temperature is determined according to the product of the third adjustment parameter and the second gas temperature, and the reduction range of the second gas pressure is determined according to the product of the third adjustment parameter and the second gas pressure.

[0111] During implementation, actual implementers can set the preset oil and gas concentration based on actual conditions or based on the average oil and gas concentration of damaged tank structures that have passed qualification tests in historical data. Preferably, the preset oil and gas concentration is set to 0.5 to 0.7 times the average oil and gas concentration of the maximum tolerance level of tank structures that have passed qualification tests in historical data.

[0112] It is understandable that the recovered gas may be nitrogen, carbon dioxide, air, etc., and the cleaning solvent may be gasoline, kerosene, acetone, special tank cleaner, and other solvents that do not chemically react with the fuel.

[0113] The present invention can improve the efficiency of subsequent determination of the recovery method by obtaining the key attachment area of ​​the residual fuel on the inner wall of the oil tank to be processed, and can completely recover the residual fuel in the oil tank. By determining the recovery method of the residual fuel based on the key area characteristics of the key attachment area and the correlation relationship between the key fuel characteristics, it is possible to more accurately recover the residual fuel with different characteristics, improve the recovery efficiency of the residual fuel, and by introducing recovery gas into the interior of the oil tank to be processed for recovery, it is possible to avoid damage to the oil tank. By detecting the oil and gas concentration in the oil tank to be processed to determine whether it is necessary to adjust the recovery method of the residual fuel on the inner wall of the oil tank to be processed, it is possible to avoid damage to the oil tank to be processed, and can completely recover the residual fuel in the oil tank.

[0114] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for cleaning and recovering residual fuel in a fuel tank, characterized in that: include: Step S1, obtaining a key attachment area of ​​the residual fuel on the inner wall of the fuel tank to be processed, and detecting key area features and key fuel features of the key attachment area, wherein the area features include area, flatness and roughness, and the fuel features include density and viscosity of the fuel; Step S2, processing the key area feature and the key fuel feature to obtain a correlation relationship between the key area feature and the key fuel feature; Step S3, determining a recovery method of the residual fuel on the inner wall of the fuel tank to be processed based on the correlation between the key area feature and the key fuel feature, including a first recovery method and a second recovery method; Wherein, under the first association relationship, a first recovery method is adopted to recover the residual fuel, and a first gas parameter of the recovered gas introduced into the recovery process is determined based on the key fuel characteristics, wherein the first gas parameter includes a first gas flow rate, a first gas temperature, and a first gas pressure; Under the second association relationship, a second recovery method is adopted to recover the residual fuel, and a key amount of the cleaning solvent introduced is determined based on the key area characteristics, and a second gas parameter of the recovered gas introduced during the recovery process is determined, wherein the second gas parameter includes a second gas flow rate, a second gas temperature, and a second gas pressure; Step S4, detecting the oil gas concentration in the oil tank to be processed to determine whether it is necessary to adjust the recovery method of the residual fuel on the inner wall of the oil tank to be processed.

2. The method for cleaning and recovering residual fuel in a fuel tank according to claim 1, characterized in that: In step S3, the first recycling method includes: During the recovery process, the recovery gas is introduced into the key attachment area of ​​the oil tank to be processed with the first gas parameter, the fluidity of the residual fuel is detected, and whether the recovery process is completed is determined based on the fluidity of the residual fuel.

3. The method for cleaning and recovering residual fuel in a fuel tank according to claim 2, characterized in that: In step S3, the second recycling method includes: During the recovery process, a critical amount of cleaning solvent is introduced into the oil tank to be processed, and vibration stirring is performed, the recovered fuel characteristics of the key attachment area are detected, the recovered fuel characteristics are compared with the key fuel characteristics, and according to the comparison result, it is determined whether to start introducing the recovered gas into the key attachment area of ​​the oil tank to be processed with a second gas parameter, the fluidity of the residual fuel is detected, and it is determined whether the recovery process is completed according to the fluidity of the residual fuel.

4. The method for cleaning and recovering residual fuel in a fuel tank according to claim 3, characterized in that: In the step S1, it includes: The thickness of the residual fuel adhesion layer at each position of the inner wall of the oil tank to be processed is detected, and the key adhesion area is determined according to the thickness difference of the residual fuel adhesion layer at adjacent positions of the inner wall of the oil tank to be processed.

5. The method for cleaning and recovering residual fuel in a fuel tank according to claim 4, characterized in that: The step S2 comprises: Step S21, constructing a sample data set based on the regional characteristics of the area where the residual fuel adheres to the inner wall of the fuel tank in the historical data and the fuel characteristics; Step S22, training the initial association relationship model according to the sample data set to obtain a target association relationship model; Step S23, inputting the key area feature and the key fuel feature into a target association relationship model to obtain the correlation between the key area feature and the key fuel feature output by the target association relationship model; Step S24, comparing the correlation degree with a preset correlation degree, and determining the correlation relationship between the key area feature and the key fuel feature based on the comparison result.

6. The method for cleaning and recovering residual fuel in a fuel tank according to claim 5, characterized in that: In the step S24, it includes: If the correlation degree is less than a preset correlation degree, determining that the correlation relationship between the key area feature and the key fuel feature conforms to the first correlation relationship; If the correlation degree is greater than or equal to the preset correlation degree, it is determined that the correlation relationship between the key area feature and the key fuel feature conforms to the second correlation relationship.

7. The method for cleaning and recovering residual fuel in a fuel tank according to claim 6, characterized in that: In the step S3, determining the first gas parameter of the recycled gas during the recycling process based on the key fuel characteristics includes: Step S31, constructing a first parameter model based on the key fuel characteristics; Step S32, determining a first adjustment parameter according to the first parameter model; Step S33, determining a first gas parameter of the recycled gas introduced into the recovery process based on the first adjustment parameter.

8. The method for cleaning and recovering residual fuel in a fuel tank according to claim 7, characterized in that: In step S3, determining the critical flow rate of the cleaning solvent based on the key area characteristics includes: Building an inner wall cleaning model based on the area of ​​the key attachment area and the inner wall area of ​​the oil tank to be processed; The critical flow rate of the cleaning solvent is determined according to the inner wall cleaning model.

9. The method for cleaning and recovering residual fuel in a fuel tank according to claim 8, characterized in that: In step S3, determining the second gas parameter of the recycled gas introduced into the recycling process includes: Step S34, determining a second adjustment parameter according to the flatness and roughness of the key attachment area; Step S35, determining a second gas parameter of the recycled gas introduced into the recovery process based on the second adjustment parameter.

10. The method for cleaning and recovering residual fuel in a fuel tank according to claim 9, characterized in that: In the step S4, it includes: If the oil gas concentration in the oil tank to be processed is greater than the preset oil gas concentration, it is determined that the recovery method of the residual fuel on the inner wall of the oil tank to be processed needs to be adjusted.

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