Surfactant identification method and identification equipment based on boiling heat transfer characteristics of surfactant solution

Abstract

The invention discloses a surfactant identification method based on the boiling characteristics of surfactant solutions and an identification device thereof. The identification device is used to obtain boiling characteristic parameters of a plurality of known surfactant solutions, and at the same time, the preconditions on which the boiling characteristic parameters of each known surfactant solution are obtained are collected, and the boiling characteristic parameters of the known surfactant solutions and the corresponding preconditions are used as identification criteria of the surfactant; the identification criteria of surfactants of different concentrations, different preconditions and different types are collected to construct a surfactant identification criterion database; then, the identification criteria of the surfactant to be identified under specific preconditions are obtained; the identification criteria of the surfactant to be identified are compared with the identification criteria in the surfactant identification criterion database, and the identification of the surfactant to be identified is achieved according to the comparison method of the identification criteria.

Description

Technical Field

[0001] The invention belongs to the technical field of substance identification, in particular to a surfactant substance identification method based on boiling heat transfer characteristics of a surfactant solution and an identification device thereof. Background Art

[0002] There is a huge demand for substance identification in all walks of life, and many methods for substance identification have been proposed. Patent 1 (Chen Zhiqiang, Zhang Li, Kang Kejun, Wang Xuewu, Huang Qingping, Li Yuanjing, Liu Yinong, Zhao Ziran, Xiao Yongshun, 8290230, U.S. Patent, Method and apparatus for substance identification) proposes to use high-energy rays and low-energy rays to transmit the inspected object to obtain high-energy transmission images and low-energy transmission images of the object to identify the substance. Patent 2 (Boecker Sebastian, Rasche Florian, Zichner Thomas, 8263931, U.S. Patent, Method for identifying in particular unknown substances by mass spectrometry) proposes to identify unknown substances by mass spectrometry. Patent 3 (H. Fuchs, T. Friedrich, W. Schrepp. Method for identifying active substances [P]. Germany: CN1231728, 1999) proposes to detect active substances using signal changes observed by scanning optical near-field microscope equipment. Patent 4 (Zhu Tuo, Ni Xiaowu, Chen Guoqing, Gao Shumei, Yu Ruipeng, Xu Hui, He Haijian, Gu Endong. A method for identifying alcohol substances by fluorescence spectroscopy [P]. Jiangsu: CN101042344, 2007) provides a method for identifying alcohol substances of different concentrations and different types using fluorescence spectroscopy. Patent 5 (Shi Wei, Zhou Chengzhuo, Tan Haoyue, Wen Jiaqi, Yu Hongxia. Identification method of androgenic active substances in environmental samples based on characteristic liquid-mass fragment matching [P], Jiangsu Province: CN111413444A, 2020) extracts characteristic fragments that can characterize activity and constructs a method for screening and identifying androgenic active substances based on characteristic fragments. Looking at these methods, the most consistent feature is that they basically require the use of expensive and professional instruments such as mass spectrometers, chromatographs, and spectrometers, which is not conducive to achieving simple and economical substance identification. Therefore, seeking a simple, reliable, economical and practical substance identification method is an urgent problem to be solved today.

[0003] After adding a small amount of surfactant to the solution, an extremely dilute surfactant solution with a certain mass concentration is formed. Since the surfactant has the characteristic of adsorption on various interfaces composed of gas, liquid and solid phases, when the surfactant solution is boiled, the boiling bubble behavior and boiling heat transfer characteristics of the surfactant solution will change compared with the original solution. Under the same boiling conditions, the boiling heat transfer characteristics of the surfactant solution will be different depending on the type of surfactant and the mass concentration of the surfactant solution. If the boiling heat transfer characteristic parameters of the unknown surfactant substance can be extracted and compared with the boiling heat transfer characteristic parameters of the known substance, the type of surfactant can be identified accordingly. The identification method provided by the present invention is to identify surfactant substances based on the above principle. Summary of the invention

[0004] In order to address the deficiencies in the prior art, the present application proposes a surfactant identification method and identification equipment based on the boiling heat transfer characteristics of surfactant solutions, and utilizes the boiling heat transfer characteristics of surfactant solutions to provide a simple, convenient, practical, accurate and economical surfactant identification method and identification equipment.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A surfactant identification method based on the boiling characteristics of a surfactant solution comprises the following steps:

[0007] Step 1, obtaining boiling characteristic parameters of multiple known surfactant solutions, and collecting the preconditions on which the boiling characteristic parameters of each known surfactant solution are obtained, and using the boiling characteristic parameters of the known surfactant solution and the corresponding preconditions as identification criteria of the surfactant; constructing a surfactant identification criterion database using identification criteria of different concentrations, different preconditions and different types of surfactants;

[0008] Step 2, obtaining identification criteria of the surfactant to be identified under certain prerequisites;

[0009] Step 3, comparing the identification criteria of the surfactant to be identified collected in step 2 with the data in the surfactant identification criteria database, thereby achieving identification of the surfactant to be identified.

[0010] Further, the boiling characteristic parameters include boiling bubble characteristic parameters, boiling heat transfer characteristic parameters and correlation parameters between the boiling bubble characteristic parameters and the boiling heat transfer characteristic parameters;

[0011] Furthermore, the boiling bubble characteristic parameters include the boiling bubble detachment diameter D d and the frequency of separation Respectively expressed as:

[0012]

[0013] Where n is the number of bubbles that form, grow, and detach from the boiling surface, and D di is the equivalent detachment diameter of the i-th boiling bubble volume; f i is the boiling bubble detachment frequency collected for the i-th time, and m is the number of consecutive collections by the shooting device within the same time interval Δτ;

[0014] The boiling heat transfer characteristic parameters include the wall superheat Δt and the boiling heat transfer coefficient h, which are respectively expressed as:

[0015] Δt=t w -t s

[0016]

[0017] Among them, t w is the average boiling surface temperature, t s is the saturated boiling temperature of the surfactant solution under boiling pressure; Q is the heating power applied to the boiling surface by the heating device; A is the area of ​​the boiling surface; Δt is the wall superheat.

[0018] The correlation parameter R between the boiling bubble characteristic parameter and the boiling heat transfer characteristic parameter is expressed as:

[0019]

[0020] Where Δt is the wall superheat; h is the boiling heat transfer coefficient; Δτ is the time interval, D d is the boiling bubble detachment diameter; n is the number of bubbles; ρ v is the vapor density; h fg is the latent heat of vaporization.

[0021] Furthermore, the prerequisites for obtaining boiling characteristic parameters include: solvent type, mass concentration of the configured surfactant solution, boiling form and heating device for obtaining the corresponding boiling form, setting parameters of shooting equipment, boiling surface material type and surface characteristic parameters, heating method and heating amount setting parameters, shooting parameters of shooting imaging equipment, image processing setting parameters, and data acquisition equipment setting parameters;

[0022] Further, the method for data comparison in step 3 is:

[0023] If the absolute values ​​of the relative errors between the identification criteria of the known surfactant and the identification criteria of the surfactant to be identified are all within the range of 0-10%, then the comparison is determined to be successful and the type of the surfactant to be identified is determined;

[0024] If the absolute values ​​of the relative errors between the identification criteria of the known surfactant and the identification criteria of the surfactant to be identified are all greater than 10%, the comparison is considered unsuccessful;

[0025] If the absolute value of the relative error between the identification criterion of the known surfactant and the identification criterion of the surfactant to be identified is within the range of 0-10%, then the criterion formed by the boiling bubble characteristic parameters is compared alone. If the absolute value of the relative error of the boiling bubble characteristic parameters is within the range of 0-10%, then the comparison is determined to be successful and the type of the identified surfactant is determined; or the boiling heat transfer characteristic parameters are compared alone, or the correlation parameter R between the boiling bubble characteristic parameters and the boiling heat transfer characteristic parameters is compared alone. If the absolute value of the relative error is within the range of 0-20%, then the comparison is determined to be successful and the type of the identified surfactant is determined.

[0026] A surfactant identification device based on the boiling characteristics of a surfactant solution comprises a solution configuration system, a boiling test system, a computer system and a device box; the solution configuration system is used to complete the configuration of the surfactant solution; the boiling test system is used to realize the boiling of the surfactant solution and parameter collection; the computer system realizes the control and data processing of the surfactant identification device, the solution configuration system, the boiling test system and the computer system itself, the judgment comparison and result output, and plays the role of display, control and software carrier at the same time; the device box is used to centrally place the solution configuration system, the boiling test system, and the related equipment in the computer system, so as to form a set of surfactant material identification equipment that is easy to carry and store.

[0027] Furthermore, the boiling test system includes a boiling container, a first heating device, a second heating device, a cooling device, a data acquisition device, a photographing device and an insulation device; the bottom surface of the boiling container is in contact with the first heating device, and the first heating device provides a boiling surface; a second heating device is provided on the side wall of the boiling container, which is used to provide heat flow to the boiling surface and replenish the heat loss of the boiling solution; the cooling device is arranged on the top of the boiling container, which is used to condense the steam generated by boiling into liquid and recover it to the boiling container; the boiling container, the first heating device, the second heating device, and the cooling device are jointly used to realize various boiling conditions of the surfactant solution; the data acquisition device is used to collect temperature parameters and heating parameters during the boiling process in the boiling container; the photographing device is arranged toward the boiling surface of the boiling container, which is used to collect boiling bubble images of the surfactant solution on the boiling surface; the insulation device is wrapped around the outside of the boiling test system to achieve thermal insulation.

[0028] Furthermore, the computer system includes a control unit and a pre-installed material identification software system; the control unit is used to control the operation of the weighing device, the heating device, the data acquisition device and the photographing device; the functions of the material identification software system are: (1) processing and calculating the image signal collected by the photographing device, and extracting the boiling bubble characteristic parameters; (2) processing and calculating the temperature parameters and heating parameters of the boiling process collected by the data acquisition device, and extracting the boiling heat transfer characteristic parameters; (3) extracting the correlation relationship parameters between the boiling bubble characteristic parameters and the boiling heat transfer characteristic parameters; (4) storing the known surfactant material judgment database, identifying and judging the surfactants, and outputting the identification results.

[0029] Furthermore, the control unit includes a signal acquisition module, a signal processing module, a data cache module, a data transmission module, a display module, a communication module and a power module; the signal acquisition module is respectively connected to the weighing device, the heating device, the data acquisition device and the shooting device, and is used to collect the mass signal transmitted by the weighing device, the data signal collected by the data acquisition device and the image signal captured by the shooting device; the signal processing module receives the signal collected by the signal acquisition module and processes it to extract the boiling characteristic parameters of the surfactant solution; the data cache module is used to store the boiling characteristic parameters of the surfactant solution extracted by the signal processing module; the data transmission module transmits the data stored in the data cache module to the material identification software system and receives the data sent by the material identification software system; the display module is used to display operation commands, user interaction information and comparison results; the communication module is used for the computer system to communicate with the weighing device, the heating device, the data acquisition device and the shooting device and other devices on the user side; the power module provides power to the computer system, the weighing device, the heating device, the data acquisition device and the shooting device and the user side devices.

[0030] Further, the substance identification software system includes a data layer subunit, a processing layer subunit and a user layer subunit; the data layer subunit includes a weighing device database module, a heating device database module, a data acquisition device database module, a photographing device database module and a criterion database module; and each module of the data layer subunit is used to store data generated by the weighing device, data generated by the heating device, data generated by the data acquisition device, data generated by the photographing device, an identification criterion database of known surfactant solutions and user-defined criterion data respectively;

[0031] The processing layer subunit includes an operation control module, an equipment control module, a data receiving module, a data processing module, a data storage module, a criterion comparison module, a display module and a communication module; the operation control module is used for the operation control of the material identification device of the present invention; the equipment control module is used to control the opening and closing of the weighing device, the heating device, the data acquisition device and the shooting device and the transmission of their data information; the data receiving module is used to transmit the signals from the weighing device, the heating device, the data acquisition device and the shooting device to the computer system, and receive the instructions issued by the computer system; the data processing module is used to process the signals from the weighing device, the heating device, the data acquisition device and the shooting device and form the identification criterion data; the data storage module is used to store the processed data; the criterion comparison module is used to retrieve the identification criterion data from the data storage module and the criterion database module, and compare the identification criterion of the identified substance with the known substance according to the predefined criterion and generate the material identification result; the display module is used to display the operation instructions, data information and material identification results, etc.; the communication module is used to control the communication interface of the computer system to connect the weighing device, the heating device, the data acquisition device and the shooting device and other devices on the user side for communication;

[0032] The user layer subunit includes a solution configuration module, a boiling test module, an image shooting module, a criterion management module and a result display module; the solution configuration module is used to guide or lead the user to complete the operation process of solution configuration; the boiling test module is used to guide or lead the user to complete the operation process of boiling test; the image shooting module is used to guide or lead the user to complete the operation process of boiling bubble image acquisition; the criterion management module is used to guide or lead the user to complete the operation process of importing, deleting or modifying the identification criteria of known surfactant substances; the result display module is used to guide or lead the user to complete the operation process of displaying and querying the identification results.

[0033] Beneficial effects of the present invention:

[0034] 1. The present application proposes a surfactant identification method based on the boiling characteristics of surfactant solutions, which utilizes the boiling bubble characteristics, boiling heat transfer characteristics and their correlation during the boiling process of surfactant solutions to identify the types of surfactants. The identification principle is simple and reliable, the identification criteria are rich, the identification strategy is reasonable and the identification accuracy is high.

[0035] 2. The surfactant identification device designed in the present application is based on the boiling characteristics of surfactant solution. The identification device is simple, easy to implement and economical. Compared with existing expensive equipment such as spectrometers and mass spectrometers, its hardware cost is greatly reduced.

[0036] 3. The identification equipment designed in this application does not require special maintenance, and the maintenance cost can be basically ignored. In addition, the identification operation process is simple, no professional special training is required, and it is suitable for popular use. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a flow chart of the surfactant identification method of the present invention;

[0038] Figure 2 is a schematic diagram of a surfactant identification device of the present invention;

[0039] Figure 3 is a diagram of a boiling test system of a surfactant identification device of the present invention;

[0040] Figure 4 It is a diagram of a heating device in a boiling test system of a surfactant identification device of the present invention;

[0041] Figure 5 is a diagram of a control unit of a surfactant identification device of the present invention;

[0042] Figure 6 It is a schematic diagram of the material identification software system architecture in the surfactant identification device of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and 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.

[0044] like Figure 1 The surfactant identification method based on the boiling characteristics of the surfactant solution shown comprises the following steps:

[0045] Step 1, obtaining boiling characteristic parameters of multiple known surfactant solutions (including boiling bubble characteristic parameters, boiling heat transfer characteristic parameters and the correlation between boiling bubble characteristic parameters and boiling heat transfer characteristic parameters), and collecting the preconditions based on which each known surfactant solution obtains the boiling characteristic parameters, and using the boiling characteristic parameters of the known surfactant solution and the corresponding preconditions as identification criteria for the surfactant; constructing a surfactant identification criterion database using identification criteria of different concentrations, different preconditions and different types of surfactants; the specific process is:

[0046] Step 1.1, preparing surfactant solutions of various known surfactants with different concentrations, the preparation method is as follows:

[0047] Step 1.1.1, at room temperature, starting from 20 ppm, the concentration of the known surfactant solution is selected in an arithmetic sequence with a tolerance of 40 ppm, and multiple mass concentrations such as 20, 60, 100, 140, 180, 220, 260, and 300 ppm are selected for configuration;

[0048] Step 1.1.2, according to the mass concentration of the selected surfactant solution, a certain mass of surfactant material is configured using a weighing device 11 and a solution container 12, and then according to the mass concentration of the surfactant solution, the mass of the required solvent is calculated and the corresponding mass of the solvent is weighed using a material weighing device 11 and a solution container 12; the weighed solvent and the weighed surfactant are poured into the solution container 12 to configure a surfactant solution of a certain mass concentration; in this embodiment, the solvent can be an aqueous solution. If an aqueous solution is used, in order to provide an accurate identification criterion and prevent the influence of impurities in the water on the identification criterion, the aqueous solution for configuring the surfactant solution is preferably pure water, distilled water or deionized water. The solvent of the surfactant solution can also be a non-aqueous solution. In this embodiment, the concentration range, value tolerance, and number of selected concentrations of the surfactant solution are also not fixed and can be determined by oneself, but the preferred concentration range is 0-300ppm.

[0049] Step 1.2, detecting boiling characteristic parameters of the prepared surfactant solutions of different concentrations under different preconditions.

[0050] Step 1.2.1, pouring the surfactant solution prepared in step 1.1 into the boiling container 13 of the boiling test system 02, and carrying out a boiling test of the surfactant solution according to the selected prerequisites;

[0051] Step 1.2.2, using a data acquisition device 16 to collect boiling parameters of the surfactant solution during boiling, the boiling parameters including temperature parameters, heating parameters and other user required parameters (such as measurement environment temperature, humidity and measurement time, etc.); using a shooting device 17 to shoot boiling bubble image signals during the boiling of the surfactant solution;

[0052] Step 1.2.3, respectively input the boiling parameters collected by the data acquisition device 16 and the boiling bubble image signal collected by the shooting device 17 into the computer system 03; the computer system 03 and its control unit 19 respectively perform quantization processing on the boiling bubble image signal and calculation processing on the collected boiling parameters to obtain boiling characteristic parameters of the surfactant solution when boiling, the boiling characteristic parameters include boiling bubble characteristic parameters, boiling heat transfer characteristic parameters and the correlation between the boiling bubble characteristic parameters and the boiling heat transfer characteristic parameters.

[0053] Step 1.3, based on the obtained boiling characteristic parameters, known surfactant substances and preconditions, a database of identification criteria for known surfactant substances is formed. The specific process is as follows:

[0054] At the same time, the computer system 03 extracts the corresponding solute (i.e., the known surfactant type) and preconditions (including the solvent type, the mass concentration of the configured surfactant solution, the boiling form and the heating device for obtaining the corresponding boiling form, the setting parameters of the shooting equipment, the boiling surface material type and surface characteristic parameters, the heating method and heating amount setting parameters, the shooting parameters of the imaging equipment, the image processing setting parameters, and the data acquisition equipment setting parameters) when the boiling characteristic parameters are obtained, and stores the obtained boiling characteristic parameters and their corresponding solution conditions and preconditions in the criterion database, thereby obtaining the identification criterion of the known surfactant substances under the conditions; the above test is repeated on the known surfactant solutions of different mass concentrations in turn to obtain the identification criterion database of the known surfactant substances.

[0055] Step 2, obtaining the identification criteria of the surfactant to be identified; the specific process is:

[0056] Step 2.1, determining the preconditions for the identification of the surfactant to be identified, the preconditions including the type of solvent, the mass concentration of the surfactant solution, the boiling form and the heating device for obtaining the corresponding boiling form, the setting parameters of the shooting equipment, the type of boiling surface material and surface characteristic parameters, the heating method and heating amount setting parameters, the shooting parameters of the imaging equipment, the image processing setting parameters, the data acquisition equipment setting parameters, etc.;

[0057] Step 2.2, according to the determined prerequisites, preparing the solution of the surfactant to be identified;

[0058] Step 2.3, pouring the surfactant solution to be identified into the boiling container in the boiling test system, and carrying out the boiling test of the surfactant solution according to the determined prerequisites, using the data acquisition device 16 to collect the boiling parameters (i.e., temperature parameters, heating parameters and other user required parameters) of the surfactant solution to be identified during the boiling process; using the shooting device 17 to shoot the boiling bubble image signal of the surfactant solution to be identified during the boiling process;

[0059] Step 2.4, quantizing the boiling bubble image signal and calculating the collected boiling parameters to obtain boiling bubble characteristic parameters, boiling heat transfer characteristic parameters and correlation parameters when the surfactant solution to be identified is boiling, and obtaining the corresponding prerequisites for these parameters, thereby forming the identification criteria for the surfactant to be identified;

[0060] The boiling bubble characteristic parameters include boiling bubble detachment diameter and detachment frequency. In this embodiment, the method for obtaining the boiling bubble characteristic parameters and the identification criteria thereof is as follows:

[0061] When the surfactant solution undergoes nucleate boiling on the heated surface, bubbles will continuously form, grow and detach on the heated surface. When the heat flux density or the superheat of the heated surface is not very high, such as under high supercooling (above 15 degrees), the generation, growth, detachment and even rupture of a single bubble on the boiling surface can clearly obtain its image characteristics. By analyzing the image of the boiling bubble taken by a high-speed camera, based on the shape image analysis method, and with the help of image processing software, the bubble detachment diameter can be obtained, and the law of the change of the bubble detachment diameter with the change of the operating parameters can also be obtained. In the present invention, considering that the boiling bubble is not a spherical bubble when it detaches, the present invention defines the boiling bubble equivalent spherical detachment diameter. By processing the boiling bubble image, the volume of the boiling bubble can be obtained. It is assumed that the volume of the boiling bubble when it detaches in the i-th boiling bubble image taken is V i , the boiling bubble volume is used to define the equivalent detachment diameter D of the boiling bubble di , and its calculation formula is:

[0062]

[0063] In addition, considering that the boiling bubble detachment diameter has statistical distribution characteristics, the boiling bubble detachment diameter is calculated by arithmetic mean. When there are n detached bubbles collected by the shooting equipment under a certain working condition, the average equivalent detachment diameter of the boiling bubble D is d It can be expressed as:

[0064]

[0065] When the type, concentration, heat flux, supercooling, etc. of the surfactant solution change, the average equivalent detachment diameter of the boiling bubbles obtained will be different. When the boiling conditions are consistent, the type of surfactant can be identified based on the average equivalent detachment diameter of the boiling bubbles. Taking the average equivalent detachment diameter of the boiling bubbles as an example, under the same preconditions, the absolute value of the relative error of the identification criterion based on the average equivalent detachment diameter of the boiling bubbles is defined as:

[0066]

[0067] For the bubble detachment frequency, under certain boiling conditions, assuming that within the time interval Δτ, the shooting device collects n bubbles from the boiling surface, grows and detaches for the i-th time, the boiling bubble detachment frequency is defined as:

[0068]

[0069] Considering that the boiling bubble detachment frequency has statistical distribution characteristics, the boiling bubble detachment frequency is calculated by arithmetic mean. Under certain working conditions, the shooting equipment continuously collects m times within the same time interval Δτ. At this time, the average detachment frequency of boiling bubbles can be expressed as:

[0070]

[0071] Taking the average detachment frequency of boiling bubbles as an example, under the same premise, the absolute value of the relative error of the identification criterion based on the average detachment frequency of boiling bubbles is defined as:

[0072]

[0073] The above-mentioned boiling bubble characteristic parameters are not limited to boiling bubble detachment diameter and detachment frequency, but also include boiling bubble characteristic parameters such as bubble growth time, bubble incubation time, bubble cycle time, bubble rising speed, and bubble density.

[0074] The boiling heat transfer characteristic parameters include the wall superheat and the boiling heat transfer coefficient. In this embodiment, the method for obtaining the boiling heat transfer characteristic parameters and their identification criteria is as follows:

[0075] The wall superheat Δt in the present invention is defined as the average boiling surface temperature t w The saturated boiling temperature t of the surfactant solution under boiling pressure s The difference. Considering that the mass concentration of the surfactant is very low, the saturated boiling temperature of the surfactant solution under boiling pressure is approximately the saturated boiling temperature corresponding to the solvent. For example, the saturated temperature of water under one atmosphere pressure is taken as 100 degrees Celsius. The average temperature of the boiling surface can be calculated by measuring the temperature on the back of the boiling surface. Considering that the boiling surface is a metal surface and the heating device is insulated, the average temperature of the boiling surface is approximately equal to the arithmetic mean of the temperature on the back of the boiling surface; the average temperature of the boiling surface can also be directly measured by an infrared radiation temperature measuring instrument. Therefore, the wall superheat Δt is calculated as:

[0076] Δt=t w -t s

[0077] The boiling heat transfer coefficient h is defined in the present invention as follows: Under a certain boiling surface, the boiling heat transfer coefficient is equal to the heat flux density q divided by the wall superheat Δt, and the heat flux density is the heating power Q applied by the heating device to the boiling surface divided by the area A of the boiling surface. The calculation formula of the boiling heat transfer coefficient h is:

[0078]

[0079] The absolute value of the relative error of the identification criterion based on the boiling heat transfer characteristic parameters is defined similarly to the boiling bubble characteristic parameters, which are:

[0080]

[0081] The boiling heat transfer characteristic parameters are not limited to the wall superheat and boiling heat transfer coefficient, but also include boiling heat transfer characteristic parameters such as the starting boiling point and critical heat flux density.

[0082] The method for obtaining the correlation parameters between the boiling bubble characteristic parameters and the boiling heat transfer characteristic parameters is as follows: Under a higher wall superheat (usually greater than 15 degrees Celsius), the boiling heat transfer process is mainly based on the bubble evaporation mechanism, and the evaporation heat Q of growing a boiling bubble is E is the volume of the boiling bubble and the vapor density ρ v , Latent heat of vaporization h fg The product of can be expressed as:

[0083]

[0084] Assuming that within the time interval Δτ, the camera captures the growth of n bubbles, then the total evaporation heat flux q of the boiling bubbles at this time is E for:

[0085]

[0086] The evaporation heat of growing boiling bubbles is transmitted through the cross-sectional area of ​​the bubbles, and the heat transmitted to the bubbles comes from the heating of the boiling surface. Based on this mechanism or model, the correlation between the boiling heat transfer characteristic parameters and the boiling bubble characteristic parameters can be established. The correlation can be written as:

[0087]

[0088] It can also be expressed as:

[0089]

[0090] Among them, q is the heat flux, Q is the heating power, A is the area of ​​the boiling surface, h is the boiling heat transfer coefficient, and Δt is the wall superheat. The correlation parameter R between the boiling heat transfer characteristic parameters and the boiling bubble characteristic parameters is defined as:

[0091]

[0092] This formula gives the correlation parameter R between the boiling heat transfer characteristic parameters (boiling heat transfer coefficient and wall superheat) and the boiling bubble characteristic parameters (boiling bubble detachment equivalent average diameter). When the solvent is water, the vapor density ρ v and latent heat of vaporization h fgThe approximation is taken as the density of water vapor and the latent heat of water vaporization. The identification criterion based on the correlation parameter between the boiling bubble characteristic parameter and the boiling heat transfer characteristic parameter, the absolute value of the relative error can be defined as:

[0093]

[0094] Step 3, comparing the identification criteria of the surfactant to be identified collected in step 2 with the data in the surfactant identification criteria database, thereby identifying the surfactant to be identified; the specific process is:

[0095] With the aid of the computer system 03 and its control unit 19, the identification criteria of the surfactant to be identified obtained in step 2 are compared with the identification criteria of the known surfactants under the same preconditions in the identification criteria database; if the absolute values ​​of the relative errors between the identification criteria of the known surfactant and the identification criteria of the surfactant to be identified are all within the range of 0-10%, it is determined that the comparison is successful, and the known surfactant and the surfactant to be identified are the same substance; if the absolute values ​​of the relative errors between the identification criteria of the known surfactant and the identification criteria of the surfactant to be identified are all greater than 10%, it is determined that the comparison is unsuccessful, and the known surfactant and the surfactant to be identified are not the same substance; if the known surfactant If the absolute value of the relative error between the identification criterion of the surfactant to be identified and the identification criterion of the surfactant to be identified is partially within the range of 0-10% and partially greater than 10%, then the criterion formed by the boiling bubble characteristic parameters is compared separately. If the absolute value of the relative error of the boiling bubble characteristic parameters is within the range of 0-10%, then it is determined that the comparison is successful, and the known surfactant and the surfactant to be identified are the same substance; the identification criterion formed by the boiling heat transfer characteristic parameters can also be compared separately, or the criterion formed by the dependent relationship parameters of the boiling bubble characteristic parameters and the boiling heat transfer characteristic parameters can be compared separately. If the absolute values ​​of the relative errors are all within the range of 0-20%, then it is determined that the comparison is successful, and the known surfactant and the surfactant to be identified are the same substance.

[0096] like Figure 2The surfactant identification device 0 based on the boiling characteristics of surfactant solution shown in the figure comprises a solution configuration system 01, a boiling test system 02, a computer system 03 and a device box 04. The solution configuration system 01 is used to complete the configuration of the surfactant solution; the boiling test system 02 is used to realize the boiling of the surfactant solution and the parameter collection; the computer system 03 realizes the control of the surfactant identification device 0, the solution configuration system 01, the boiling test system 02 and the computer system 03 itself and its data processing, criterion comparison and result output, etc., and also plays the role of display, control and software carrier; the device box 04 is used to centrally place the solution configuration system 01, the boiling test system 02, and the related equipment in the computer system 03, thereby forming a set of surfactant material identification device 0 that is easy to carry and store.

[0097] Specifically, the solution configuration system 01 includes a weighing device 11 and a solution container 12; the weighing device 11 is used to weigh the mass of the surfactant to be tested and the mass of the solvent and configure a surfactant solution of a certain mass concentration; the weighing device 11 can be an electronic balance. According to the mass concentration range and accuracy requirements of the surfactant, the weighing device range is preferably 0-150 grams, and the accuracy is preferably 0.1 mg. In order to facilitate the automatic control of the identification device, the weighing device 11 is preferably equipped with a weighing device with a communication port, which is convenient for realizing the functions of opening and closing control, parameter setting control, and transmission and storage of quality data of the weighing device 11. The solution container 12 is used to hold surfactant substances, solvents, and configured surfactant solutions. The solution container is preferably a glass beaker with a volume of 150 ml to 500 ml.

[0098] Boiling test system 02 Figure 3As shown, it includes a boiling container 13, a first heating device 14A, a second heating device 14B, a cooling device 15, a data acquisition device 16, a shooting device 17 and an insulation device 18. The bottom surface of the boiling container 13 is in contact with the first heating device 14A, and the first heating device 14A provides a boiling surface; a second heating device 14B is provided on the side wall of the boiling container 13, which is used to provide heat flow to the boiling surface and supplement the heat loss of the boiling solution; the cooling device 15 is arranged on the top of the boiling container 13, which is a partition heat exchanger, used to condense the steam generated by boiling into liquid and recover it to the boiling container 13, the cooling medium is cold water or air, the flow rate and temperature of the cooling medium are determined according to the boiling conditions, and the cooling device 15 is provided with ventilation holes to ensure that the pressure in the boiling container is consistent with the atmospheric pressure. The boiling container 13, the first heating device 14A, the second heating device 14B, and the cooling device 15 jointly realize various boiling conditions of the surfactant solution. The data acquisition device 16 is a data acquisition device suitable for multiple types of signals and multiple channels. The preferred parameters are that the number of analog input channels is not less than 32 channels, the external input signal can be temperature, current, voltage, resistance, switch state, etc., the sampling period is preferably as low as 5 milliseconds, and it has a calculation function and a statistical function and a corresponding storage device; the data acquisition device 16 is used to collect temperature parameters and heating parameters in the boiling process in the boiling container 13, wherein the temperature parameters include the temperature of the boiling surface, the temperature of the solution in the boiling container, the temperature of the insulation material in the insulation device 18, and the ambient temperature; the heating parameters include the heating power or heating current and voltage of the heating device. The shooting device 17 is set toward the boiling surface of the boiling container 13, and is used to collect the boiling bubble image of the surfactant solution on the boiling surface. The shooting device 17 is preferably a high-speed digital camera device, the fastest frame rate is preferably greater than 25 frames per second, and the shutter speed is preferably less than the minimum exposure of 0.1 seconds. The shooting device 17 is preferably equipped with a communication port to facilitate the automatic opening and closing control of the shooting device, the setting of shooting parameters, and the transmission and storage of wetting image information.

[0099] The insulation device 18 is wrapped around the outside of the boiling container 13 and the first heating device 14A, and is used to insulate the boiling container 13 and the heating device, ensuring that the boiling system is approximately an insulation system. The boiling container 13 is preferably a square container made of organic glass or metal with a visible hole, preferably 150-200 mm in height, and preferably 400-600 ml in volume. The insulation device 18 is an insulation layer fixed around the boiling container and filled with insulation material. The insulation material used can be preferably economic insulation material for medium temperature occasions such as asbestos, glass fiber, slag wool, aerogel felt, etc. The insulation layer is wrapped and fixed with aluminum foil on the outside, and the thickness of the insulation layer is determined by the type of insulation material and the boiling working condition. The area corresponding to the shooting device 17 and its light source is not filled with insulation material, so as to achieve the shooting of boiling bubble images.

[0100] The first heating device 14A and the second heating device 14B are as follows: Figure 4 As shown, it is a constant heat flux density heating device, including a stabilized power supply 141, a first voltage regulator 142A, a second voltage regulator 142B, a first voltage measuring element 143A, a second voltage measuring element 143B, a first current measuring element 144A, a second current measuring element 144B, a first resistance heating element 145A, a second resistance heating element 145B, and a boiling surface 146; the stabilized power supply 141 is respectively connected to the first resistance heating element 145A and the second resistance heating element 145B through the first voltage regulator 142A and the second voltage regulator 142B; the stabilized power supply 141 and the voltage regulator are used to stabilize and adjust the heating voltage of the resistance heating element, so as to achieve the stability and adjustment of the heating amount of the resistance heating element. The voltage of the stabilized power supply 141 is preferably a 220V AC power supply or a DC power supply; the first current measuring element 144A, the second current measuring element 144B, the first resistance heating element 145A, the second resistance heating element 145B, and the boiling surface 146. The measuring element 144B, the first voltage measuring element 143A, and the second voltage measuring element 143B measure the heating voltage and current of the first resistance heating element 145A and the second resistance heating element 145B. The voltage measuring element and the current measuring element are preferably measuring elements with an accuracy of 0.01 volt and 0.001 ampere, and are preferably measuring elements with voltage or current signal output, which is convenient for the transmission, display and storage of measurement data; the resistance heating element is preferably a heating film or a heating wire and a heating belt; the boiling surface 146 can be a solid surface of various metal materials and sizes, and the boiling surface 146 is kept flat and clean, and is finely ground with sandpaper to ensure that each position has the same surface roughness. The boiling surface 146 is preferably a copper solid surface; the size of the boiling surface 146 is preferably 3 cm long, 3 cm wide, and 0.5 cm thick, and the sandpaper is preferably 600# metallographic sandpaper. The first heating device 14A can also be a constant wall temperature heating device. At this time, the heating medium is a hot fluid and hot steam, and the flow rate and temperature of the heating medium are determined according to the boiling working condition requirements.

[0101] The computer system 03 includes a control unit 19 and a pre-installed material identification software system 20. The control unit 19 is used to control the operation of the weighing device 11, the heating device (including the first heating device 14A and the second heating device 14B), the data acquisition device 16 and the photographing device 17; the material identification software system 20 realizes the following functions: (1) processing and calculating the image signal collected by the photographing device 17, and extracting the boiling bubble characteristic parameters; (2) processing and calculating the temperature parameters and heating parameters of the boiling process collected by the data acquisition device 16, and extracting the boiling heat transfer characteristic parameters; (3) extracting the correlation R between the boiling bubble characteristic parameters and the boiling heat transfer characteristic parameters; (4) storing the known surfactant material judgment database, identifying and judging the surfactants, and outputting the identification results. Figure 5 As shown, the control unit 19 includes a signal acquisition module 21, a signal processing module 22, a data cache module 23, a data transmission module 24, a display module 25, a communication module 26 and a power module 27. The signal acquisition module 21 is respectively connected to the weighing device 11, the heating device, the data acquisition device 16 and the shooting device 17, and is used to collect the mass signal transmitted by the weighing device 11, the data signal collected by the data acquisition device 16 and the image signal captured by the shooting device 17, so as to obtain the mass information of the material weighed by the weighing device 11, the data information collected by the data acquisition device 16 and the image information captured by the shooting device 17. The signal processing module 22 receives and processes the signal collected by the signal acquisition module 21, and processes the image signal parameter data signal to obtain the boiling bubble behavior characteristic parameters and boiling heat transfer characteristic parameters of the surfactant solution, as well as the dependent relationship and correlation relationship parameters of the extraction of boiling bubble characteristic parameters and the extraction of boiling heat transfer characteristic parameters. The data cache module 23 is used to store the boiling bubble characteristic parameters, boiling heat transfer characteristic parameters and the correlation parameters between them extracted by the signal processing module 22. The data transmission module 24 is used to transmit the data stored in the data cache module 23 to the material identification software system 20 and receive the data sent by the material identification software system 20. The display module 25 is used to display operation commands, user interaction information and comparison results, etc. The communication module 26 is used for the computer system 03 to communicate with the weighing device 11, the heating device, the data acquisition device 16, the shooting device 17 and other devices on the user side. The power supply module 27 supplies power to the computer system 03, and can also provide power to the weighing device 11, the heating device, the data acquisition device 16, the shooting device 17 and the user side devices.

[0102] like Figure 6 The substance identification software system 20 shown is pre-installed in the computer system 03 and relies on the control unit 19. The structure of the substance identification software system 20 includes a data layer subunit 31, a processing layer subunit 32 and a user layer subunit 33.

[0103] The data layer subunit 31 includes a weighing device database module 311, a heating device database module 312, a data acquisition device database module 313, a photographing device database module 314, and a criterion database module 315. The weighing device database module 311 is used to store data generated by the weighing device 11, the heating device database module 312 is used to store data generated by the heating device, the data acquisition device database module 313 is used to store data generated by the data acquisition device, the photographing device database module 314 is used to store data generated by the photographing device 17, and the criterion database module 315 is used to store the identification criterion database of known surfactant solutions and user-defined criterion data.

[0104] The processing layer subunit 32 includes an operation control module 321, an equipment control module 322, a data receiving module 323, a data processing module 324, a data storage module 325, a criterion comparison module 326, a display module 327 and a communication module 328. The operation control module 321 is used for the operation control of the substance identification device 0 of the present invention. The equipment control module 322 is used to control the opening and closing of the weighing device 11, the heating device, the data acquisition device 16 and the shooting device 17 and the transmission of their data information. The data receiving module 323 is used to transmit the signals from the weighing device 11, the heating device, the data acquisition device 16 and the shooting device 17 to the computer system 03, and receive the instructions issued by the computer system 03. The data processing module 324 is used to perform signal processing on the signals from the weighing device 11, the heating device, the data acquisition device 16 and the shooting device 17, and form identification criterion data. The data storage module 325 is used to store the processed data. The criterion comparison module 326 is used to retrieve the identification criterion data from the data storage module 325 and the criterion database module 315, and compare the identification criteria of the identified substance with the known substance according to the predefined criteria and generate the substance identification result. The display module 327 is used to display the operation instructions, data information and substance identification results, etc. The communication module 328 is used to control the computer system communication interface to connect the weighing device 11, the heating device, the data acquisition device 16 and the shooting device 17 and other devices on the user side for communication. Since the substance identification software system 20 is also controlled by the control unit 19 and relies on the control unit 19, some functions of the processing layer subunit 32 are basically overlapped with those of the control unit 19.

[0105] The user layer subunit 33 includes a solution preparation module 331, a boiling test module 332, an image capture module 333, a criterion management module 334 and a result display module 335. The solution preparation module 331 is used to guide or direct the user to complete the operation process of solution preparation; the boiling test module 332 is used to guide or direct the user to complete the operation process of boiling test; the image capture module 333 is used to guide or direct the user to complete the operation process of boiling bubble image acquisition; the criterion management module 334 is used to guide or direct the user to complete the operation process of importing, deleting or modifying the identification criterion of known surfactant substances; the result display module 335 is used to guide or direct the user to complete the operation process of displaying and querying the identification results.

[0106] The above embodiments are only used to illustrate the design ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or modifications made based on the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. A surfactant identification method based on the boiling characteristics of surfactant solution, characterized in that: The steps include: Step 1, obtaining boiling characteristic parameters of multiple known surfactant solutions, and collecting the preconditions on which the boiling characteristic parameters of each known surfactant solution are obtained, and using the boiling characteristic parameters of the known surfactant solution and the corresponding preconditions as identification criteria of the surfactant; collecting identification criteria of surfactants of different concentrations, different preconditions and different types, and constructing a surfactant identification criterion database; Step 2, obtaining identification criteria of the surfactant to be identified under certain prerequisites; Step 3, comparing the identification criteria of the surfactant to be identified collected in step 2 with the data in the surfactant identification criteria database, thereby identifying the surfactant to be identified; The boiling characteristic parameters include boiling bubble characteristic parameters, boiling heat transfer characteristic parameters, and correlation parameters between the boiling bubble characteristic parameters and the boiling heat transfer characteristic parameters; The boiling bubble characteristic parameters include boiling bubble detachment diameter D d and the frequency of separation Respectively expressed as: Where n is the number of bubbles that form, grow, and detach from the boiling surface, and D di is the equivalent detachment diameter of the i-th boiling bubble volume; f i is the boiling bubble detachment frequency collected for the i-th time, and m is the number of consecutive collections by the shooting device within the same time interval Δτ; The boiling heat transfer characteristic parameters include the wall superheat Δt and the boiling heat transfer coefficient h, which are respectively expressed as: Δt=t w -t s ; Among them, t w is the average boiling surface temperature, t s is the saturated boiling temperature of the surfactant solution at the boiling pressure; Q is the heating power applied to the boiling surface by the heating device; A is the area of ​​the boiling surface; Δt is the wall superheat; The correlation parameter R between the boiling bubble characteristic parameter and the boiling heat transfer characteristic parameter is expressed as: Where Δτ is the time interval; ρ v is the vapor density; h fg is the latent heat of vaporization; The prerequisites for obtaining boiling characteristic parameters include: solvent type, mass concentration of the configured surfactant solution, boiling form and heating device for obtaining the corresponding boiling form, setting parameters of shooting equipment, boiling surface material type and surface characteristic parameters, heating method and heating amount setting parameters, shooting parameters of shooting imaging equipment, image processing setting parameters, and data acquisition equipment setting parameters; The method for data comparison in step 3 is: If the absolute values ​​of the relative errors between the identification criteria of the known surfactant and the identification criteria of the surfactant to be identified are all within the range of 0-10%, then the comparison is determined to be successful and the type of the surfactant to be identified is determined; If the absolute values ​​of the relative errors between the identification criteria of the known surfactant and the identification criteria of the surfactant to be identified are all greater than 10%, the comparison is considered unsuccessful; If the absolute value of the relative error between the identification criterion of the known surfactant and the identification criterion of the surfactant to be identified is within the range of 0-10%, then the criterion formed by the boiling bubble characteristic parameters is compared separately. If the absolute value of the relative error of the boiling bubble characteristic parameters is within the range of 0-10%, then the comparison is determined to be successful and the type of the identified surfactant is determined; or the boiling heat transfer characteristic parameters or the correlation parameter R between the boiling bubble characteristic parameters and the boiling heat transfer characteristic parameters are compared separately. If the absolute value of the relative error of the boiling heat transfer characteristic parameters or the correlation parameter R is within the range of 0-20%, then the comparison is determined to be successful and the type of the identified surfactant is determined.

2. An identification device based on the surfactant identification method according to claim 1, characterized in that: The invention comprises a solution preparation system (01), a boiling test system (02), a computer system (03) and an equipment box (04); the solution preparation system (01) is used to complete the preparation of a surfactant solution; the boiling test system (02) is used to realize the boiling of the surfactant solution and parameter collection; the computer system (03) realizes the control and data processing, criterion comparison and result output of the surfactant identification equipment, the solution preparation system (01), the boiling test system (02) and the computer system (03), and also serves as a display, control and software carrier; the equipment box (04) is used to centrally place the relevant equipment in the solution preparation system (01), the boiling test system (02) and the computer system (03), thereby forming a set of surfactant material identification equipment that is easy to carry and store.

3. A surfactant identification device based on the boiling characteristics of surfactant solution according to claim 2, characterized in that: The boiling test system (02) comprises a boiling container (13), a first heating device (14A), a second heating device (14B), a cooling device (15), a data acquisition device (16), a photographing device (17) and a heat insulation device (18); the bottom surface of the boiling container (13) is in contact with the first heating device (14A), and the first heating device (14A) provides a boiling surface; the second heating device (14B) is provided on the side wall of the boiling container (13) for providing a heat flow to the boiling surface and replenishing the heat loss of the boiling solution; the cooling device (15) is provided on the top of the boiling container (13) for heating the boiling solution to a certain extent ... The generated steam is condensed into liquid and recovered to the boiling container (13); various boiling conditions of the surfactant solution are realized by the boiling container (13), the first heating device (14A), the second heating device (14B), and the cooling device (15); the data acquisition device (16) is used to collect temperature parameters and heating parameters during the boiling process in the boiling container (13); the shooting device (17) is arranged toward the boiling surface of the boiling container (13) and is used to collect boiling bubble images of the surfactant solution on the boiling surface; the insulation device (18) is wrapped around the outside of the boiling test system (02) to achieve thermal insulation.

4. A surfactant identification device based on the boiling characteristics of surfactant solution according to claim 2, characterized in that: The computer system (03) includes a control unit (19) and a pre-installed substance identification software system (20); the control unit (19) is used to control the operation of the weighing device (11), the heating device, the data acquisition device (16) and the photographing device (17); the functions of the substance identification software system (20) are:

1. processing and calculating the image signal collected by the photographing device (17), and extracting the boiling bubble characteristic parameters; 2. processing and calculating the temperature parameters and heating parameters collected by the data acquisition device (16) during the boiling process, and extracting the boiling heat transfer characteristic parameters; 3. extracting the correlation relationship parameters between the boiling bubble characteristic parameters and the boiling heat transfer characteristic parameters; 4. Store the known surfactant material criteria database, identify and judge the surfactants, and output the identification results.

5. A surfactant identification device based on the boiling characteristics of surfactant solution according to claim 4, characterized in that: The control unit (19) comprises a signal acquisition module (21), a signal processing module (22), a data buffer module (23), a data transmission module (24), a display module (25), a communication module (26) and a power module (27); the signal acquisition module (21) is respectively connected to the weighing device (11), the heating device, the data acquisition device (16) and the photographing device (17) for collecting the mass signal transmitted by the weighing device (11), the data signal collected by the data acquisition device (16) and the image signal photographed by the photographing device (17); the signal processing module (22) receives the signal collected by the signal acquisition module (21) and processes it to extract the boiling characteristic parameters of the surfactant solution; the data buffer module (23) is used to The data transmission module (24) transmits the data stored in the data buffer module (23) to the substance identification software system (20) and receives the data sent by the substance identification software system (20); the display module (25) is used to display the operation command, user interaction information and comparison results; the communication module (26) is used for the computer system (03) to communicate with the weighing device (11), the heating device, the data acquisition device (16) and the shooting device (17) and other devices on the user side; the power supply module (27) provides power to the computer system (03), the weighing device (11), the heating device, the data acquisition device (16) and the shooting device (17) and the devices on the user side.

6. A surfactant identification device based on the boiling characteristics of surfactant solution according to claim 4, characterized in that: The substance identification software system (20) comprises a data layer subunit (31), a processing layer subunit (32) and a user layer subunit (33); the data layer subunit (31) comprises a weighing device database module (311), a heating device database module (312), a data acquisition device database module (313), a photographing device database module (314) and a criterion database module (315); and each module of the data layer subunit (31) is used to store data generated by the weighing device (11), data generated by the heating device, data generated by the data acquisition device (16), data generated by the photographing device (17), an identification criterion database of known surfactant solutions and user-defined criterion data respectively; The processing layer subunit (32) includes an operation control module (321), an equipment control module (322), a data receiving module (323), a data processing module (324), a data storage module (325), a judgment comparison module (326), a display module (327) and a communication module (328); the operation control module (321) is used for the operation control of the substance identification device of the present invention; the equipment control module (322) is used for controlling the opening and closing of the weighing device (11), the heating device, the data acquisition device (16) and the shooting device (17) and the transmission of data information; the data receiving module (323) is used for transmitting signals from the weighing device (11), the heating device, the data acquisition device (16) and the shooting device (17) to the computer system (03), and receiving signals from the computer system (03). Instructions; a data processing module (324) is used to process signals from the weighing device (11), the heating device, the data acquisition device (16) and the shooting device (17) and form identification criterion data; a data storage module (325) is used to store the processed data; a criterion comparison module (326) is used to retrieve the identification criterion data from the data storage module (325) and the criterion database module (315), and compare the identification criteria of the identified substance with the known substance according to the predefined criteria and generate a substance identification result; a display module (327) is used to display operation instructions, data information and substance identification results; a communication module (328) is used to control the computer system communication interface to connect the weighing device (11), the heating device, the data acquisition device (16) and the shooting device (17) and other devices on the user side to communicate; The user layer subunit (33) comprises a solution preparation module (331), a boiling test module (332), an image capture module (333), a criterion management module (334) and a result display module (335); the solution preparation module (331) is used to instruct or guide the user to complete the operation process of solution preparation; the boiling test module (332) is used to instruct or guide the user to complete the operation process of boiling test; the image capture module (333) is used to instruct or guide the user to complete the operation process of boiling bubble image acquisition; the criterion management module (334) is used to instruct or guide the user to complete the operation process of importing, deleting or modifying the identification criterion of known surfactant substances; and the result display module (335) is used to instruct or guide the user to complete the operation process of displaying and querying the identification results.

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