Temperature-controlled microcapsule shell selection method for inhibiting coal spontaneous combustion and related devices
By constructing a weighted function model and combining it with coal sample characteristic data, the characteristic temperature threshold of the temperature-controlled microcapsule shell was accurately determined, solving the problem of the difficulty in accurately grasping the release temperature point of the temperature-sensitive resistive microcapsule and achieving a precise controlled release effect to suppress coal spontaneous combustion.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- EASTERN GANSU UNIVERSITY
- Filing Date
- 2026-04-24
- Publication Date
- 2026-06-12
AI Technical Summary
Existing temperature-sensitive inhibitory microcapsules face a bottleneck in accurately determining the characteristic temperature point that triggers release, making it difficult to precisely quantify the temperature-release relationship and resulting in poor performance in inhibiting coal spontaneous combustion.
By constructing a weighted function model of the compound system parameters and preparation parameters, and combining coal sample characteristic data, the characteristic temperature threshold of the temperature-controlled microcapsule shell is accurately determined, thereby achieving the precise release of temperature-sensitive resistive microcapsules.
This improved the controlled-release effect and reliability of microencapsulated inhibitors, enhancing the precision and effectiveness of coal spontaneous combustion prevention.
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Figure CN122201509A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of coal spontaneous combustion prevention technology, and in particular to a method and related device for selecting temperature-controlled microcapsule shells to suppress coal spontaneous combustion. Background Technology
[0002] Spontaneous combustion of coal causes enormous economic losses, casualties, and severe environmental pollution. Therefore, preventing spontaneous combustion of coal in coal mines is of paramount importance. Currently, commonly used methods for inhibiting spontaneous combustion of coal include water injection, grouting, air leakage sealing, inhibitors, pressure equalization, inert gas, and gel-based fire prevention and extinguishing technologies. Among these, temperature-sensitive microcapsule inhibitors for inhibiting spontaneous combustion of coal have achieved good results.
[0003] Currently, there is a bottleneck in the systematic approach to accurately grasp the characteristic temperature point of the release of temperature-sensitive resisted microcapsules. The fundamental reason is that the release behavior is a complex process involving the nonlinear coupling of multiple parameters such as the compound system and the preparation method. Existing research lacks a universal systematic approach that can accurately and quantitatively describe this "temperature-release" relationship. Summary of the Invention
[0004] The purpose of this application is to provide a method and related apparatus for selecting temperature-controlled microcapsule shells to suppress spontaneous combustion of coal, which can determine the characteristic temperature threshold for the decomposition of temperature-controlled release capsule shells.
[0005] To achieve the above objectives, this application provides the following solution: In a first aspect, this application provides a method for selecting the shell of a temperature-controlled microcapsule for suppressing spontaneous combustion of coal, comprising: Obtain the compound system parameters and preparation parameters of the temperature-controlled microcapsule shell; The parameters of the compound system and the preparation parameters are assigned a first weight and a second weight, respectively. Based on the first weight of the compound system parameters, calculate the first total weight of the compound system parameters and establish a first function; the first function represents the mapping relationship between the shell performance parameters and the first total weight; Based on the second weight of the preparation parameters, the second total weight of the preparation parameters is calculated, and a second function is established; the second function represents the mapping relationship between the shell performance parameters and the second total weight. Based on the first function and the second function, calculate the preferred range threshold of the performance parameters of the housing; Assign a third weight to the performance parameters of the shell, and calculate the total weight of the performance parameters; Establish a third function that integrates the action temperature threshold with the total weight of performance parameters; The action temperature threshold is obtained by solving the third function. Based on the aforementioned action temperature threshold, combined with industrial elemental analysis data and thermal analysis experimental data of the coal sample, the appropriate characteristic temperature threshold for the temperature-controlled microcapsule shell is determined.
[0006] Optionally, the parameters of the compound system include material type, proportion and modification method; the preparation parameters include stirring speed and stirring time; and the shell performance parameters include flowability, diffusivity, dispersibility and thermal stability.
[0007] Optionally, the formula expression for the first function is: ; In the formula, the function The sum of the corresponding values of the various composite system parameters of the temperature-controlled microcapsule moving shell and their weights. A1o1 is the product of the material type and its weight, A2o2 is the product of the proportion and its weight, A3o3 is the product of the modification method and its weight, A... n o n It is the product of other composite parameters and their corresponding weights.
[0008] Optionally, the formula expression for the second function is: ; In the formula, the function It is the sum of the corresponding values of each preparation parameter of the temperature-controlled microcapsule moving shell and their weighted products. , It is the product of the stirring speed and its weight. It is the product of the stirring time and its weight. It is the product of other preparation parameters and their corresponding weights.
[0009] Optionally, the formula expression for the third function is: ; in, ; It is the sum of the corresponding values of each performance parameter of the temperature-controlled microcapsule moving shell and their weights. It is the product of liquidity and its weight. It is the product of diffusivity and its weight. It is the product of dispersion and its weight. It is the product of other performance parameters and their corresponding weights; function It is the action temperature threshold T0 and the coverage rate and The two related equations; and These are experience points.
[0010] Optionally, the industrial elemental analysis data of the coal sample includes moisture content, sulfur content, nitrogen content, and degree of metamorphism; the thermal analysis experimental data includes at least same-order thermal analysis, C80 micro-thermogravimetric analysis, and programmed temperature rise experimental data.
[0011] Optionally, the material of the temperature-controlled microcapsule shell is a mixture of inorganic and organic materials, wherein the inorganic material is sodium bicarbonate and the organic material is polyethylene glycol.
[0012] In a second aspect, this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement a method for selecting a temperature-controlled microcapsule shell for suppressing spontaneous combustion of coal as described above.
[0013] Thirdly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-described methods for selecting a temperature-controlled microcapsule shell to suppress spontaneous combustion of coal.
[0014] Fourthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the steps of any of the above-described methods for selecting a temperature-controlled microcapsule shell to suppress spontaneous combustion of coal.
[0015] According to the specific embodiments provided in this application, the following technical effects are disclosed: This application provides a method and related apparatus for selecting the shell of temperature-controlled microcapsules for suppressing spontaneous combustion of coal. By constructing a weighted function model of the compound system parameters and preparation parameters, the performance parameters of the shell are quantitatively analyzed. Then, combined with the characteristic data of coal samples, the characteristic temperature threshold is accurately determined. This effectively solves the technical bottleneck of the difficulty in accurately controlling the trigger release temperature of temperature-sensitive inhibitory microcapsules. It provides a shell selection scheme for the field of coal spontaneous combustion prevention and control, and helps to improve the controlled release effect and reliability of microcapsule inhibitors in practical applications. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is an application environment diagram of a temperature-controlled microcapsule shell selection method for suppressing spontaneous combustion of coal, as described in one embodiment of this application. Figure 2A schematic flowchart illustrating a method for selecting a temperature-controlled microcapsule shell for suppressing spontaneous combustion of coal, provided in an embodiment of this application; Figure 3 A schematic diagram illustrating the process of determining a suitable temperature threshold for a temperature-controlled release capsule according to an embodiment of this application; Figure 4 A schematic diagram illustrating the process of determining a suitable temperature threshold for studying the oxidation characteristics of coal according to an embodiment of this application; Figure 5 A flowchart illustrating a method for selecting a temperature-controlled microcapsule shell according to an embodiment of this application; Figure 6 A schematic diagram illustrating a suitable characteristic temperature threshold process for a coal sample provided in an embodiment of this application; Figure 7 A temperature T determination diagram is provided for the moving shell of the temperature-controlled microcapsule in one embodiment of this application; Figure 8 A bar chart showing the action temperature of microcapsules with different PEG molecular weights provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation
[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0019] The thermosensitive microcapsule inhibition technology for suppressing coal spontaneous combustion essentially involves encapsulating a traditional inhibitor core material with a thermosensitive material as the wall material. This wall material, covered with microcapsules, decomposes at a specific temperature threshold. When the ambient temperature reaches the wall material's design threshold, the material melts or ruptures, precisely releasing the inhibitor, thereby extinguishing or inhibiting coal spontaneous combustion and thus suppressing the process of coal spontaneous combustion.
[0020] With the development of technology for inhibiting spontaneous combustion of coal using temperature-sensitive microcapsule inhibitors, the ability to achieve "on-demand release" of these inhibitors in the event of coal spontaneous combustion has become a research hotspot. For fields requiring "controlled release" to suppress the reaction rate of coal spontaneous combustion, understanding the characteristic temperature threshold at which the temperature-sensitive microcapsule shell automatically decomposes and releases the internal inhibitor is crucial. Accurately determining this characteristic temperature threshold is a key technology for achieving this goal. It triggers the release of the internal inhibitor by precisely controlling the characteristic temperature threshold, reaching the temperature threshold for temperature-induced controlled-release shell decomposition, thereby effectively protecting the core material, improving material stability, and achieving precise release.
[0021] Therefore, the purpose of this application is to provide a method and related apparatus for selecting temperature-controlled microcapsule shells for suppressing spontaneous combustion of coal, which can determine the characteristic temperature threshold for the decomposition of temperature-controlled release capsule shells.
[0022] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] The temperature-controlled microcapsule shell selection method for suppressing spontaneous combustion of coal provided in this application embodiment can be applied to, for example... Figure 1 In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be set up independently, integrated into server 104, or placed in the cloud or on another server. Terminal 102 can send the acquired compound system parameters and preparation parameters of the temperature-controlled microcapsule shell to server 104. After receiving the compound system parameters and preparation parameters, server 104 assigns a first weight and a second weight to the compound system parameters and preparation parameters, respectively. Based on the first weight of the compound system parameters, server 104 calculates the first total weight of the compound system parameters and establishes a first function. The first function represents the mapping relationship between the shell performance parameters and the first total weight. Based on the second weight of the preparation parameters, server 104 calculates the second total weight of the preparation parameters and establishes a second function. The second function represents the mapping relationship between the shell performance parameters and the second total weight. Based on the first and second functions, server 104 calculates the preferred range threshold of the shell performance parameters. Server 102 assigns a third weight to the shell performance parameters and calculates the total weight of the performance parameters. Server 104 establishes a third function relating the action temperature threshold to the total weight of the performance parameters. Server 104 solves the action temperature threshold based on the third function. Based on the action temperature threshold, combined with the industrial elemental analysis data and thermal analysis experimental data of the coal sample, server 104 determines the suitable characteristic temperature threshold of the temperature-controlled microcapsule shell. Server 104 can feed back the obtained suitable characteristic temperature threshold to terminal 102. Furthermore, in some embodiments, the method for selecting the temperature-controlled microcapsule shell for suppressing coal spontaneous combustion can also be implemented separately by server 104 or terminal 102. For example, terminal 102 can directly select the temperature-controlled microcapsule shell for suppressing coal spontaneous combustion based on the compound system parameters and preparation parameters of the temperature-controlled microcapsule shell; alternatively, server 104 can obtain the compound system parameters and preparation parameters of the temperature-controlled microcapsule shell from the data storage system and select the temperature-controlled microcapsule shell based on these parameters.
[0024] The terminal 102 can be, but is not limited to, various desktop computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, and smart in-vehicle devices. Portable wearable devices can include smartwatches, smart bracelets, and head-mounted devices. The server 104 can be implemented using a standalone server or a server cluster composed of multiple servers, or it can be a cloud server.
[0025] In one exemplary embodiment, such as Figure 2 As shown, a method for selecting the shell of a temperature-controlled microcapsule for suppressing spontaneous combustion of coal is provided. This method is executed by a computer device, specifically by a terminal or server alone, or by both a terminal and a server. In this embodiment, the method is applied to... Figure 1 Taking server 104 as an example, the explanation includes the following steps 201 to 209. Wherein: Step 201: Obtain the compound system parameters and preparation parameters of the temperature-controlled microcapsule shell; Step 202: Assign a first weight and a second weight to the parameters of the compound system and the preparation parameters, respectively; Step 203: Calculate the first total weight of the composite system parameters based on the first weight of the composite system parameters, and establish a first function; the first function represents the mapping relationship between the shell performance parameters and the first total weight; Step 204: Calculate the second total weight of the preparation parameters based on the second weight of the preparation parameters, and establish a second function; the second function represents the mapping relationship between the shell performance parameters and the second total weight. Step 205: Based on the first function and the second function, calculate the preferred range threshold of the performance parameters of the housing; Step 206: Assign a third weight to the performance parameters of the shell and calculate the total weight of the performance parameters; Step 207: Establish a third function that combines the action temperature threshold with the total weight of performance parameters; Step 208: Obtain the action temperature threshold by solving the third function; Step 209: Based on the aforementioned action temperature threshold, and combined with the industrial elemental analysis data and thermal analysis experimental data of the coal sample, determine the appropriate characteristic temperature threshold for the temperature-controlled microcapsule shell.
[0026] In some embodiments, such as Figure 3 As shown, determining the appropriate temperature threshold T for the temperature-controlled release capsule during general research can be done as follows: 1) The preparation of temperature-controlled release microcapsules generally requires consideration of two aspects: the compound system and the preparation parameters.
[0027] 2) There are many related requirements to consider in the compound system, such as material type A1, ratio A2, modification method A3 and many other factors. Different combinations of these factors will result in different performance parameters of the final temperature-release controlled microcapsule.
[0028] 3) In the preparation parameters, the stirring speed B1, stirring time B2 and other factors are the same as the influencing factors in the compound system. Different combinations of values will result in different performance parameters of the final temperature-release controlled microcapsules.
[0029] 4) Performance parameters refer to fluidity (C1), diffusivity (C2), dispersibility (C3), thermal stability (C4), and other related factors (C). n The values of these parameters can be obtained through certain calculation methods and analysis techniques.
[0030] 5) These parameter values can be calculated and analyzed to obtain the action temperature threshold T0 and the coverage rate. The corresponding value. Then, as follows: Figure 4 The characteristic temperature threshold T for determining the decomposition of the temperature-controlled release capsule shell is calculated in the manner shown.
[0031] Specifically, in the process of studying the oxidation characteristics of coal, the appropriate characteristic temperature threshold T can be determined as follows: Generally, after selecting a coal sample, this application first performs industrial elemental analysis. After analysis, this application can obtain data on the coal sample's moisture content (C1), sulfur content (C2), nitrogen content (C3), degree of metamorphism (C4), and other relevant factors (C) in the coal sample. n A series of experiments, including same-order thermal analysis, C80 micro-thermogravimetric analysis, and programmed temperature rise experiments, were used to further study the spontaneous combustion of coal samples. The relevant numerical values of temperature-induced controlled-release microcapsules for inhibiting spontaneous combustion of coal were explored and analyzed. Furthermore, the optimal action temperature threshold T0 and encapsulation rate of the temperature-induced controlled-release capsule shell for inhibiting spontaneous combustion of coal were calculated and analyzed. Then, through further analysis, a suitable characteristic temperature threshold T is obtained.
[0032] In some embodiments, when performing steps 201-209, such as Figure 5 As shown, specifically, it can be as follows: Step 1: Enter the compound system of the temperature-induced controlled-release microcapsules and a series of preparation parameters. The specific compound system includes material type A1, ratio A2, modification method A3, and other relevant factors A4. n The preparation parameters include material stirring speed B1, stirring time B2, and other relevant factors B. n : Generate the corresponding code.
[0033] Step 2: Based on the system composition and preparation parameters obtained above, set weights to obtain the corresponding weights of all influencing factors in the compound system and the corresponding weights of all influencing factors in the preparation parameters.
[0034] Specifically, in order to accurately measure and define the degree of influence of these factors on the performance of temperature-induced controlled-release microcapsules, this application addresses numerous factors such as material type A1, formulation ratio A2, and modification method A3. n By assigning different weights o1, o2, o3, etc., the corresponding weights of all influencing factors in the compound system are finally obtained: material type A1o1, ratio A2o2, modification method A3o3, and the corresponding weights of other influencing factors A. n o n .
[0035] To accurately measure and define the influence of these factors on the performance of temperature-induced controlled-release microcapsules, this application addresses factors such as material stirring speed B1 and stirring time B2. n By assigning different weights p1 and p2, the corresponding weights of all influencing factors in the preparation parameters are finally obtained: stirring speed B1p1, stirring time B2p2, etc., and the corresponding weights B of other influencing factors. n p n .
[0036] Step 3: Sum the corresponding weights of all influencing factors in the compound system obtained in Step 2 above, and establish a function f(o) that sums the performance parameters and the weights assigned to the compound system. Function f(o): ; In the formula, the function It is the sum of the corresponding values of the various composite system parameters of the temperature-controlled microcapsule moving shell and their weights. Where A1o1 is the product of the material type and its weight, A2o2 is the product of the proportion and its weight, A3o3 is the product of the modification method and its weight, and A... n o n It is the product of other composite parameters and their corresponding weights.
[0037] function Its function is to convert the parameters and weights of each composite system in the moving shell of the temperature-controlled microcapsule into mathematical language. The purpose is to link the relationship between the composite system parameters and the performance parameters, and to establish a connection for assigning the corresponding weights of the composite system parameters.
[0038] The corresponding weights of all influencing factors in the preparation parameters obtained in step two above are summed, and a function g(p) is established to sum the weights assigned to the performance parameters and the preparation parameters.
[0039] Function g(p): ; In the above formula, the function It is the sum of the corresponding values of each preparation parameter of the temperature-controlled microcapsule moving shell and their weighted products. ; It is the product of the stirring speed and its weight. It is the product of the stirring time and its weight. It is the product of other preparation parameters and their corresponding weights.
[0040] function Its function is to transform the various preparation parameters and weights of the temperature-controlled microcapsule moving shell into mathematical language, with the aim of linking the relationship between preparation parameters and performance parameters and establishing a connection for assigning values to the corresponding weights of preparation parameters.
[0041] Specifically, the weighted proportions A1o1, A2o2, A3o3, and other influencing factors in the compound system of temperature-induced controlled-release microcapsules are as follows: n o n Summing is performed to obtain the total weight of the temperature-controlled release microcapsule compound system. And establish the sum of weights assigned to performance parameters and the compound system. The function f(o).
[0042] Among them, the corresponding weight ratios A1o1 (material type), A2o2 (proportion), A3o3 (modification method), and other influencing factors are: n o n These are the influencing factors of the compound system; the assigned weights are to differentiate the importance of these influencing factors to the temperature-controlled release microcapsule compound system. (For example: material type A1o1, ratio A2o2, and modification method A3o3 are all influencing factors, but o1=0.3, o2=0.15, and o3=0.1, which indicates that material type A1 is a relatively important factor in the temperature-controlled release microcapsule compound system); the total weight of the compound system. It is a collection of all factors that affect the performance parameters of temperature-controlled release microcapsules.
[0043] Specifically, the weights B of stirring speed B1p1, stirring time B2p2, and other influencing factors in the preparation parameters of temperature-induced controlled-release microcapsules are as follows: n p n The parameters are summed to obtain the total weights of the preparation parameters for the temperature-induced controlled-release microcapsules. And establish a weighted sum of performance parameters and preparation parameters. The function g(p).
[0044] The preparation parameters are the same as those for the compound system, and will not be repeated here.
[0045] Step 4: Overall weighting of the temperature-controlled release microcapsule compound system The total weight of the preparation parameters of temperature-controlled release microcapsules Rigorous professional analysis and calculations can yield relevant performance parameters of the temperature-induced controlled-release microcapsule shell, specifically including flowability (C1), diffusivity (C2), dispersibility (C3), thermal stability (C4), and other related factors (C). n parameter.
[0046] The performance parameters are jointly determined by the compound system and the preparation parameters; that is, the values of the performance parameters are determined by both the compound system and the preparation parameters. A set of determined values for a compound system and preparation parameters corresponds to a set of performance parameters. These performance parameters are derived by measuring them in the laboratory according to the obtained compound system and preparation parameters.
[0047] Specifically, functions It is the sum of the weights assigned to the performance parameters and the compound system. The function g(p) is the sum of the weights assigned to the performance parameters and the preparation parameters. The function of the total weight of the complex system. It is a collection of all factors influencing the performance parameters of temperature-induced controlled-release microcapsules. This collection is a mathematical relationship f(o) encompassing all factors affecting the performance parameters. The total weight of the preparation parameters. This is another set of factors influencing the performance parameters of temperature-induced controlled-release microcapsules. This set is another mathematical relationship g(p) encompassing all the factors affecting the performance parameters. Through these two mathematical relationships: the function g(p) and the function f(o), a suitable range threshold for the performance parameters can be calculated. (Both functions g(p) and f(o) are multiple linear equation systems. These two sets of linear equation systems have common solutions. These common solutions constitute a suitable range threshold for the performance parameters, namely, fluidity C1, diffusivity C2, dispersibility C3, thermal stability C4, and other related factors C...) n ).
[0048] Step 5: Based on the flowability C1, diffusivity C2, dispersibility C3, thermal stability C4, and other relevant factors obtained in Step 4 above... n Parameters are set with weights to obtain the fluidity C1q1, diffusivity C2q2, dispersion C3q3, thermal stability C4q4, and other related factors C. n q n .
[0049] Among them, fluidity C1, diffusivity C2, dispersion C3, thermal stability C4, and other related factors C n These are all performance parameters (C1, C...) 2、 C3, C 4、 Cn (A symbol for the parameter to represent its corresponding numerical value). q1, q2, q3, q4, q n This represents the weight, which is applied to the action temperature threshold T0 and the coverage rate. .
[0050] The weights are assigned to differentiate the importance of these influencing factors to the temperature-controlled release microcapsule compound system. (For example, flowability C1q1, diffusivity C2q2, and dispersibility C3q3 are all influencing factors, but q1=0.3, q2=0.15, and q3=0.1, which indicates that flowability C1 significantly affects the action temperature threshold T0 and the encapsulation rate.) (A relatively important factor).
[0051] Specifically, performance parameters refer to fluidity (C1), diffusivity (C2), dispersion (C3), thermal stability (C4), and other related factors (C). n The values are assigned to q1, q2, q3, q4, and q. n The corresponding weight values are then determined. Finally, the weights of all influencing factors in the performance parameters are obtained: fluidity C1q1, diffusivity C2q2, dispersion C3q3, thermal stability C4q4, and other related factors C. n q n .
[0052] Step Six: Based on the fluidity C1q1, diffusivity C2q2, dispersibility C3q3, thermal stability C4q4, and other relevant factors obtained in Step Five above... n q n The values are summed to obtain the total weight of the performance parameters of the temperature-activated controlled-release microcapsules. The factors considered in the performance parameters of the temperature-activated controlled-release microcapsules, including flowability (C1q1), diffusivity (C2q2), dispersibility (C3q3), thermal stability (C4q4), and other related factors, are then evaluated. n q n The summation is then performed to obtain the total weight of the performance parameters of the temperature-activated controlled-release microcapsules. .
[0053] Step 7: Establish the action temperature threshold T0 and coverage rate The sum of the weights assigned to the performance parameters The function I(q).
[0054] Function I(q): ; in, In the formula, It is the sum of the corresponding values of each performance parameter of the temperature-controlled microcapsule moving shell and their weights; It is the product of liquidity and its weight. It is the product of diffusivity and its weight. It is the product of dispersion and its weight. It is the product of other performance parameters and their corresponding weights. (Function) It is the action temperature threshold T0 and the coverage rate and The two related equations. Among them... and These are two empirical values, the sum of the weights assigned to the performance parameters obtained in this application. At that time, through and The sum of the weights assigned to the performance parameters By directly multiplying them, we can directly obtain the action temperature threshold T0 and the coverage rate. .function Its function is to sum the products of the various performance parameters of the temperature-controlled microcapsule moving shell and their weights. The relationship between action temperature and coverage rate is translated into mathematical terms, with the aim of summing the products of performance parameters and their weights. Combining this with the relationship between action temperature and coverage makes it easier to solve for action temperature and coverage.
[0055] Specifically, the function I(q) is the action temperature threshold T0 and the coverage rate. The sum of the weights assigned to the performance parameters The function I(q) is the total weight of the performance parameters. It affects the temperature threshold T0 of the thermal action and the coverage rate. This is a collection of all influencing factors. This collection includes the temperature threshold T0 and the coverage rate that affect the temperature action. A mathematical relationship among all influencing factors. (This mathematical relationship is similar to a system of multiple linear equations, which can be solved to determine: the temperature threshold T0 and the coverage rate.) ).
[0056] Step 8: After calculating and analyzing the performance parameters of the temperature-activated controlled-release microcapsules, the action temperature threshold T0 and the encapsulation rate are obtained. The corresponding value.
[0057] Step 9: After obtaining the action temperature threshold T0 and the coverage rate After obtaining the corresponding values, further calculations and analyses are performed to obtain the suitable temperature threshold T for the temperature-controlled release capsule.
[0058] In another exemplary embodiment of this application, when the coal sample is at a suitable characteristic temperature threshold T, such as Figure 6 As shown: The time and location of the coal sampling area were recorded, along with data on the moisture content (C1), sulfur content (C2), nitrogen content (C3), metamorphism degree (C4), and other relevant factors in the coal sample. n .
[0059] Data on the moisture content (C1), sulfur content (C2), nitrogen content (C3), metamorphism degree (C4), and other relevant factors in the coal sample (C) n Assign q1, q2, q3, q4, q n The corresponding weight values are then determined. Finally, the corresponding weights of all influencing factors in the coal sample are obtained: moisture content C1q1, sulfur content C2q2, nitrogen content C3q3, metamorphism degree C4q4, and other related factors C. n q n .
[0060] The moisture content C1q1, sulfur content C2q2, nitrogen content C3q3, metamorphism degree C4q4, and other relevant factors in the coal sample were analyzed. n q n The total weight of the coal sample is obtained by summing the results. .
[0061] Establish the characteristic temperature threshold T and the total weight of the coal sample. The relevant function f(o).
[0062] Further calculations yielded the suitable characteristic temperature threshold T for the coal sample.
[0063] This application also provides a specific example, in which the above-mentioned method for selecting the shell of a temperature-controlled microcapsule for suppressing spontaneous combustion of coal is applied, specifically as follows: First, the design of the compound system and the setting of preparation parameters are carried out (this example only studies the temperature-controlled microcapsule shell): (1) Material type (A1): The shell material of the temperature-controlled microcapsule in this example is a mixture of inorganic and organic materials. The inorganic material used in this example is sodium bicarbonate, and the organic material is polyethylene glycol. In the examples in Table 1, PEG4000, PEG6000, PEG8000, and PEG20000 were selected and mixed with sodium bicarbonate respectively.
[0064] (2) Ratio (A2): In this example, the ratio of organic to inorganic materials in the temperature-controlled microcapsule shell is 2:1, 3:1, 4:1, 5:3 and 4:3, respectively. The specific parameter values are shown in Table 1.
[0065] (3) Modification method (A3): The modification method of the temperature-controlled microcapsule shell material in this example is microfluidic technology.
[0066] (4) Stirring speed (B1): The stirring speed of the temperature-controlled microcapsule shell in this example is 400 r / min, 600 r / min, 800 r / min and 1000 r / min respectively. The specific parameter values are shown in Table 1.
[0067] (5) Stirring time (B2): This example uses four values of stirring time for the temperature-controlled microcapsule shell material: 16h, 20h, 22h, and 24h. The specific parameter values are shown in Table 1.
[0068] Then, performance parameter tests were performed: (1) Flowability (C1): The angle of repose measurement method was used for the shell material of the temperature-controlled microcapsule in this example. The specific parameter values are shown in Table 1 based on the actual measured angle of repose values of PEG4000, PEG6000, PEG8000 and PEG20000.
[0069] (2) Diffusivity (C2): The shell material of the temperature-controlled microcapsule in this example is specifically designed for the 24-hour cumulative release rate of heat-triggered release-type inhibited microcapsules. Based on the actual measured release rate values of PEG4000, PEG6000, PEG8000, and PEG20000, the specific parameter values are shown in Table 1.
[0070] (3) Dispersibility (C3): The particle size distribution method was used to determine the shell material of the temperature-controlled microcapsules in this example. Based on the actual measured PDI values of PEG4000, PEG6000, PEG8000 and PEG20000, the specific parameter values are shown in Table 1.
[0071] Furthermore, the characteristic temperature threshold (T0) is determined, and the operating temperature T of the moving shell of the temperature-controlled microcapsule is obtained. Figure 7 As shown.
[0072] In this example, the characteristic temperature threshold of the temperature-controlled microcapsule shell was mainly determined by differential scanning calorimetry (DTG). In the DTG test, based on the TG-DTG curve of mass change, the temperature at the maximum rate of mass change during the first mass decrease on the DTG curve is called the temperature T of the moving shell of the temperature-controlled microcapsule. Specific parameter values are shown in Table 1.
[0073] Finally, the data of the temperature-controlled microcapsule shell are analyzed and presented; Table 1 shows examples of the compound system and the set values of the preparation parameters. The performance parameters and preparation parameters also exhibit certain patterns: Table 1. Parameters of Temperature-Controlled Microcapsule Shells
[0074] (1) In this example, when the ratio and stirring speed of PEG are the same and the modification method is microparticle technology, the operating temperature of the temperature-controlled microcapsule shell gradually increases as the molecular weight of PEG increases.
[0075] (2) In this example, the encapsulation rate of the temperature-controlled microcapsule shell with a PEG molecular weight ranging from 2000 to 20000 is between 75% and 95%, and the specific parameter values are shown in Table 1.
[0076] (3) In this example, the 24h diffusive release rate of the temperature-controlled microcapsule shell with a PEG molecular weight ranging from 2000 to 20000 is between 25% and 85%, and the specific parameter values are shown in Table 1.
[0077] (4) In this example, the repose angle of the fluidity of the temperature-controlled microcapsule shell with a PEG molecular weight ranging from 2000 to 20000 is between 34° and 45°. The specific parameter values are shown in Table 1.
[0078] The operating temperature T of the moving shell of the temperature-controlled microcapsule in this example is according to... Figure 7 The method was used to analyze and determine the activation temperature of microcapsules with different PEG molecular weights. Figure 8 The corresponding values are as follows: the operating temperature of the moving shell of PEG4000 temperature-controlled microcapsule is 57℃, the operating temperature of the moving shell of PEG6000 temperature-controlled microcapsule is 63℃, the operating temperature of the moving shell of PEG8000 temperature-controlled microcapsule is 67℃, and the operating temperature of the moving shell of PEG20000 temperature-controlled microcapsule is 73℃.
[0079] In one exemplary embodiment, a computer device is provided, which may be a server or a terminal, and its internal structure diagram may be as follows. Figure 9 As shown, the computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs in the non-volatile storage media. The database stores suitable characteristic temperature thresholds. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network connection. When executed by the processor, the computer program implements a method for selecting the shell of a temperature-controlled microcapsule for suppressing spontaneous combustion of coal.
[0080] Those skilled in the art will understand that Figure 9 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.
[0081] In one exemplary embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.
[0082] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.
[0083] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.
[0084] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Moreover, the collection, use and processing of the relevant data are carried out in compliance with the relevant data protection laws and policies of the country where the location is located, and with the authorization granted by the owner of the corresponding device.
[0085] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).
[0086] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.
[0087] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0088] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A method for selecting the shell of a temperature-controlled microcapsule for suppressing spontaneous combustion of coal, characterized in that, include: Obtain the compound system parameters and preparation parameters of the temperature-controlled microcapsule shell; The parameters of the compound system and the preparation parameters are assigned a first weight and a second weight, respectively. Based on the first weight of the compound system parameters, calculate the first total weight of the compound system parameters and establish a first function; the first function represents the mapping relationship between the shell performance parameters and the first total weight; Based on the second weight of the preparation parameters, the second total weight of the preparation parameters is calculated, and a second function is established; the second function represents the mapping relationship between the shell performance parameters and the second total weight. Based on the first function and the second function, calculate the preferred range threshold of the performance parameters of the housing; Assign a third weight to the performance parameters of the shell, and calculate the total weight of the performance parameters; Establish a third function that integrates the action temperature threshold with the total weight of performance parameters; The action temperature threshold is obtained by solving the third function. Based on the aforementioned action temperature threshold, combined with industrial elemental analysis data and thermal analysis experimental data of the coal sample, the appropriate characteristic temperature threshold for the temperature-controlled microcapsule shell is determined.
2. The method for selecting a temperature-controlled microcapsule shell for suppressing spontaneous combustion of coal according to claim 1, characterized in that, The parameters of the compound system include material type, proportion and modification method; the preparation parameters include stirring speed and stirring time; the shell performance parameters include fluidity, diffusivity, dispersibility and thermal stability.
3. The method for selecting a temperature-controlled microcapsule shell for suppressing spontaneous combustion of coal according to claim 2, characterized in that, The formula expression for the first function is: ； In the formula, the function The sum of the corresponding values of the various composite system parameters of the temperature-controlled microcapsule moving shell and their weights. A1o1 is the product of the material type and its weight, A2o2 is the product of the proportion and its weight, A3o3 is the product of the modification method and its weight, A... n o n It is the product of other composite parameters and their corresponding weights.
4. The method for selecting a temperature-controlled microcapsule shell for suppressing spontaneous combustion of coal according to claim 3, characterized in that, The formula for the second function is: ； In the formula, the function It is the sum of the corresponding values of each preparation parameter of the temperature-controlled microcapsule moving shell and their weighted products. , It is the product of the stirring speed and its weight. It is the product of the stirring time and its weight. It is the product of other preparation parameters and their corresponding weights.
5. The method for selecting a temperature-controlled microcapsule shell for suppressing spontaneous combustion of coal according to claim 1, characterized in that, The formula expression for the third function is: ； in, ; It is the sum of the corresponding values of each performance parameter of the temperature-controlled microcapsule moving shell and their weights. It is the product of liquidity and its weight. It is the product of diffusivity and its weight. It is the product of dispersion and its weight. It is Its performance parameters are the product of their corresponding weights; function The action temperature threshold T0 and the coverage ratio are related to The two related equations; and These are experience points.
6. The method for selecting a temperature-controlled microcapsule shell for suppressing spontaneous combustion of coal according to claim 1, characterized in that, The industrial elemental analysis data of the coal sample includes moisture content, sulfur content, nitrogen content, and degree of metamorphism; the thermal analysis experimental data includes at least the same-order thermal analysis, C80 micro-thermogravimetric analysis, and programmed temperature rise experimental data.
7. The method for selecting a temperature-controlled microcapsule shell for suppressing spontaneous combustion of coal according to claim 1, characterized in that, The temperature-controlled microcapsule shell is made of a mixture of inorganic and organic materials, wherein the inorganic material is sodium bicarbonate and the organic material is polyethylene glycol.
8. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement a method for selecting a temperature-controlled microcapsule shell for suppressing spontaneous combustion of coal, as described in any one of claims 1-7.
9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements a method for selecting a temperature-controlled microcapsule shell for suppressing spontaneous combustion of coal, as described in any one of claims 1-7.
10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements a method for selecting a temperature-controlled microcapsule shell for suppressing spontaneous combustion of coal, as described in any one of claims 1-7.