Gas-solid ratio control method, system and fluidized bed jet mill

Abstract

The present invention relates to a gas-solid ratio control method, system, and fluidized bed airflow mill. The method includes: obtaining a first flow rate of compressed air entering the fluidized bed airflow mill and the weight of the material in the fluidized bed airflow mill; calculating the ratio of the first flow rate to the weight of the material in the fluidized bed airflow mill to obtain a first gas-solid ratio; calculating a first difference between the first gas-solid ratio and a first standard gas-solid ratio; determining whether the first difference meets a first preset difference standard; if the first difference does not meet the first preset difference standard, adjusting the feed frequency of the fluidized bed airflow mill according to the first difference so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard; the feed frequency is the frequency of feeding a preset weight of the material to be crushed into the fluidized bed airflow mill. This solution can maintain the stability of the gas-solid ratio of the fluidized bed airflow mill.

Description

Technical Field

[0001] The present invention relates to the field of fluidized bed jet mills, and in particular to a gas-solid ratio control method and system, and a fluidized bed jet mill. Background Art

[0002] The fluidized bed jet mill is a fluid energy pulverizing device that effectively overcomes the wear and particle size control issues common in other jet mills. It is a commonly used device for ultrafine grinding in the modern powder processing industry. The gas-to-solid ratio (the ratio of the compressed air flow entering the fluidized bed jet mill to the weight of the material within the mill) is a critical parameter of the fluidized bed jet mill. Too low or too high a gas-to-solid ratio will result in a pulverized product with excessive fineness, which may not meet the required performance.

[0003] Based on this, how to maintain the stability of the gas-solid ratio of the fluidized bed jet mill has become a technical problem that needs to be solved urgently. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a gas-solid ratio control method, system and fluidized bed jet mill.

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

[0006] An embodiment of the present invention provides a gas-solid ratio control method, which is applied to a fluidized bed jet mill, comprising:

[0007] obtaining a first flow rate of compressed air entering the fluidized bed jet mill;

[0008] Obtain the weight of the material in the fluidized bed jet mill;

[0009] Calculating a ratio of the first flow rate to the weight of the material in the fluidized bed jet mill to obtain a first gas-to-solid ratio of the fluidized bed jet mill;

[0010] calculating a first difference between the first gas-to-solid ratio and a first standard gas-to-solid ratio;

[0011] determining whether the first difference satisfies a first preset difference standard;

[0012] If the first difference does not meet the first preset difference standard, the feeding frequency of the fluidized bed jet mill is adjusted according to the first difference, so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard; the feeding frequency is the frequency of feeding a preset weight of material to be crushed into the fluidized bed jet mill.

[0013] The embodiment of the present invention further provides a gas-solid ratio control system applied to a fluidized bed jet mill, comprising:

[0014] A first flow acquisition module is used to acquire a first flow of compressed air entering the fluidized bed jet mill;

[0015] A material weight acquisition module in a fluidized bed jet mill, used to acquire the weight of the material in the fluidized bed jet mill;

[0016] a first gas-solid ratio calculation module, configured to calculate a ratio of the first flow rate to a weight of material in the fluidized bed jet mill, to obtain a first gas-solid ratio of the fluidized bed jet mill;

[0017] a first difference calculation module, configured to calculate a first difference between the first gas-solid ratio and a first standard gas-solid ratio;

[0018] A first judging module, configured to judge whether the first difference satisfies a first preset difference standard;

[0019] The first adjustment module is used to adjust the feeding frequency of the fluidized bed jet mill according to the first difference if the first difference does not meet the first preset difference standard, so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard; the feeding frequency is the frequency of feeding a preset weight of material to be crushed into the fluidized bed jet mill.

[0020] The embodiment of the present invention further provides a fluidized bed jet mill, comprising: a fluidized bed jet mill body, and a control device, a gas flow detection device, and a first weighing device arranged on the fluidized bed jet mill body;

[0021] The gas flow detection device and the first weighing device are electrically connected to the control device respectively;

[0022] The gas flow detection device is used to obtain a first flow rate of compressed air entering the fluidized bed jet mill and send the first flow rate to the control device;

[0023] The first weighing device is used to obtain the weight of the material in the fluidized bed jet mill and send the weight of the material in the fluidized bed jet mill to the control device;

[0024] The control device is used to calculate the ratio of the first flow rate to the weight of the material in the fluidized bed air flow mill to obtain the first gas-solid ratio of the fluidized bed air flow mill; calculate the first difference between the first gas-solid ratio and the first standard gas-solid ratio; determine whether the first difference meets the first preset difference standard; if the first difference does not meet the first preset difference standard, then adjust the feeding frequency of the fluidized bed air flow mill according to the first difference, so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard; the feeding frequency is the frequency of feeding a preset weight of material to be crushed into the fluidized bed air flow mill.

[0025] The embodiment of the present invention adopts the above technical solution, and calculates the first gas-solid ratio of the fluidized bed jet mill by obtaining the first flow rate (the flow rate of compressed air entering the fluidized bed jet mill) and the weight of the material in the fluidized bed jet mill, and compares the first gas-solid ratio with the first standard gas-solid ratio. If the comparison result shows that the difference between the first gas-solid ratio and the first standard gas-solid ratio does not meet the first preset difference standard, the feeding frequency of the fluidized bed jet mill is adjusted so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard. In this way, the present solution can maintain the stability of the gas-solid ratio of the fluidized bed jet mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1 This is a schematic structural diagram of a fluidized bed jet mill provided in an embodiment of this specification;

[0028] Figure 2 This is a flow chart of a gas-solid ratio control method provided in an embodiment of this specification;

[0029] Figure 3 It is a structural diagram of a gas-solid ratio control system provided in an embodiment of this specification. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The fluidized bed jet mill is a flow energy pulverizing device that effectively overcomes the problems of wear and particle size control commonly found in other jet mills. It is a commonly used device for ultrafine grinding in the modern powder processing industry. The gas-to-solid ratio (the ratio of the flow rate of compressed air entering the fluidized bed jet mill to the weight of the material in the fluidized bed jet mill) is an important parameter of the fluidized bed jet mill. When the gas-to-solid ratio is too small, the kinetic energy obtained by the material to be ground in the fluidized bed jet mill is relatively small, which weakens the corresponding collision, friction, and shearing effects, and thus makes the fineness of the pulverized product produced by the fluidized bed jet mill too large. When the gas-to-solid ratio is too large, the concentration of the material to be ground in the fluidized bed jet mill is low, which reduces the probability of mutual collision between the materials to be ground, which also makes the fineness of the pulverized product produced by the fluidized bed jet mill too large. In other words, if the gas-to-solid ratio is too small or too large, the fineness of the pulverized product produced by the fluidized bed jet mill will be too large and cannot meet the use requirements.

[0032] Based on this, how to maintain the stability of the gas-solid ratio of the fluidized bed jet mill has become a technical problem that needs to be solved urgently.

[0033] In order to solve the above technical problems, the embodiments of this specification provide a gas-to-solid ratio control method, system, and fluidized bed jet mill, which are described in detail below with reference to the accompanying drawings.

[0034] Figure 1 This is a schematic diagram of the structure of a fluidized bed jet mill provided in the embodiment of this specification. Figure 1 As shown, the fluidized bed air flow mill of the embodiment of this specification includes: a control device 1, a gas flow regulating device 2, a gas flow detecting device 3, a first weighing device 4, a fluidized bed air flow mill body 5, a classifying wheel motor 6, a feeding device 7, a pre-storage bin 8 and a second weighing device 9.

[0035] The gas flow regulating device 2 , the gas flow detecting device 3 , the first weighing device 4 , the classifying wheel motor 6 , the feeding device 7 and the second weighing device 9 are electrically connected to the control device 1 respectively.

[0036] The gas flow regulating device 2 can specifically be an electric regulating valve in the prior art; the gas flow detecting device 3 can specifically be a vortex flow meter in the prior art; the first weighing device 4 and the second weighing device 9 can specifically be electronic scales in the prior art; the feeding device 7 can specifically be a variable frequency star feeder in the prior art; the control device 1 can specifically be a programmable logic controller (PLC) in the prior art.

[0037] A gas flow control device 2 and a gas flow detection device 3 are installed on the compressed air inlet pipe of the fluidized bed jet mill. The gas flow control device 2 is used to adjust the flow rate of the compressed air entering the fluidized bed jet mill. The gas flow detection device 3 is used to obtain the flow rate of the compressed air entering the fluidized bed jet mill and transmit the flow rate to the control device 1.

[0038] The pre-storage bin 8 temporarily stores the material to be ground. The material stored in the pre-storage bin 8 is delivered to the fluidized bed jet mill body 5 at a fixed feeding frequency, and the weight of the material delivered to the fluidized bed jet mill body 5 each time can be fixed. After being delivered to the fluidized bed jet mill body 5, the material is ground there. The ground material that meets the required fineness is discharged from the fluidized bed jet mill body 5 by the classifying wheel, while the unground material remains inside the fluidized bed body 5.

[0039] The first weighing device 4 is disposed within the fluidized bed jet mill body 5 and is used to weigh the material within the fluidized bed jet mill body 5 and transmit the weighed weight to the control device 1. The material within the fluidized bed jet mill body 5 includes the material to be crushed that has just entered the jet mill body 5 during pulverization, the material being pulverized, and the material that has reached the required fineness and is about to be discharged through the classifying wheel. In other words, the weight of the material within the fluidized bed jet mill described in this application includes the total weight of the material to be crushed that has just entered the jet mill body 5 during pulverization, the material being pulverized, and the material that has reached the required fineness and is about to be discharged through the classifying wheel.

[0040] The second weighing device 9 is provided in the pre-storage bin 8 , and is used to weigh the weight of the material to be crushed stored in the pre-storage bin 8 , and send the weighed weight of the material to be crushed to the control device 1 .

[0041] According to the previous description, the material to be crushed stored in the pre-storage bin 8 will be transported to the fluidized bed airflow mill body 5 at a certain feeding frequency, and the weight of the material to be crushed transported to the fluidized bed airflow mill body 5 each time can be fixed, and the device for implementing this solution is the feeding device 7. Therefore, the present application adjusts the feeding frequency of the fluidized bed airflow mill by adjusting the feeding frequency of the feeding device 7. It can be understood by those skilled in the art that adjusting the feeding frequency of the feeding device 7 will cause the weight of the material in the fluidized bed airflow mill to change, and further, when the flow rate of compressed air entering the fluidized bed airflow mill remains unchanged, adjusting the feeding frequency of the feeding device 7 (i.e., adjusting the feeding frequency of the fluidized bed airflow mill) will cause the gas-solid ratio of the fluidized bed airflow mill to change.

[0042] The control device 1 and other devices electrically connected to the control device 1 are used to implement the gas-solid ratio control method of the embodiment of this specification.

[0043] A gas-solid ratio control method provided by an embodiment of this specification is described below with reference to the accompanying drawings.

[0044] Based on a general inventive concept, the embodiments of this specification further provide a gas-solid ratio control method, which is applied to the fluidized bed jet mill of the above embodiment. Figure 2 This is a flow chart of a gas-solid ratio control method provided in the embodiment of this specification. Figure 2 As shown, the method of the embodiment of this specification includes:

[0045] Step 201: Obtain a first flow rate of compressed air entering a fluidized bed jet mill.

[0046] In the embodiment of this specification, the gas flow detection device 3 can be used to obtain a first flow rate of compressed air entering the fluidized bed jet mill, and send the first flow rate to the control device 1 .

[0047] Step 202: Obtain the weight of the material in the fluidized bed jet mill.

[0048] In the embodiment of this specification, as described above, the first weighing device 4 is used to weigh the weight of the material in the fluidized bed jet mill body 5 and send the weighed weight of the material to the control device 1 .

[0049] Step 203: Calculate the ratio of the first flow rate to the weight of the material in the fluidized bed jet mill to obtain a first gas-to-solid ratio of the fluidized bed jet mill.

[0050] In the embodiment of this specification, the control device 1 can be used to calculate the ratio of the first flow rate of compressed air entering the fluidized bed jet mill to the weight of the material in the fluidized bed jet mill body 5 to obtain the first gas-to-solid ratio of the fluidized bed jet mill.

[0051] Step 204: Calculate a first difference between the first gas-to-solid ratio and a first standard gas-to-solid ratio.

[0052] In the embodiment of this specification, the control device 1 can be used to calculate a first difference between the first gas-solid ratio and a first standard gas-solid ratio.

[0053] Step 205: Determine whether the first difference meets a first preset difference standard.

[0054] In the embodiment of this specification, the control device 1 can be used to determine whether the first difference meets a first preset difference standard.

[0055] Step 206: If the first difference does not meet the first preset difference standard, the feeding frequency of the fluidized bed jet mill is adjusted according to the first difference, so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard; the feeding frequency is the frequency of feeding a preset weight of the material to be crushed into the fluidized bed jet mill.

[0056] In an embodiment of the present specification, if the first difference does not meet the first preset difference standard, the control device 1 can send a corresponding control instruction to the feeding device 7 according to the first difference, so that the feeding device 7 adjusts the feeding frequency according to the control instruction, thereby achieving the purpose of adjusting the weight of the material in the fluidized bed air flow mill. When the flow rate of compressed air entering the fluidized bed air flow mill remains unchanged, the gas-solid ratio of the fluidized bed air flow mill will also change after the weight of the material in the fluidized bed air flow mill changes. The adjustment principle of the feeding device 7 adjusting the feeding frequency according to the control instruction can be so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard.

[0057] It should be noted that, in the embodiments of this specification, corresponding standard compressed air flow rates, standard compressed air pressures, and standard gas-to-solid ratios are pre-set for a variety of materials to be pulverized. In the above embodiments, the type of material to be pulverized in the fluidized bed jet mill remains unchanged. If the gas-to-solid ratio of the fluidized bed jet mill does not meet the requirements while the type of material to be pulverized in the fluidized bed jet mill remains unchanged, the gas-to-solid ratio of the fluidized bed jet mill can be adjusted by adjusting the feed frequency of the fluidized bed jet mill while maintaining the flow rate of compressed air entering the fluidized bed jet mill unchanged.

[0058] The embodiment of this specification adopts the above technical solution, and calculates the first gas-solid ratio of the fluidized bed airflow mill by obtaining the first flow rate (the flow rate of the compressed air entering the fluidized bed airflow mill) and the weight of the material in the fluidized bed airflow mill, and compares the first gas-solid ratio with the first standard gas-solid ratio. If the comparison result shows that the difference between the first gas-solid ratio and the first standard gas-solid ratio does not meet the first preset difference standard, the feeding frequency of the fluidized bed airflow mill is adjusted so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard. In this way, since the embodiment of this specification can maintain the difference between the gas-solid ratio of the fluidized bed airflow mill and the corresponding standard gas-solid ratio in a state that meets the corresponding preset difference standard, the embodiment of this specification can maintain the gas-solid ratio of the fluidized bed airflow mill in a state that meets the relevant requirements, so that the embodiment of this specification achieves the purpose of maintaining the stability of the gas-solid ratio of the fluidized bed airflow mill. In addition, the embodiment of this specification can automatically adjust the gas-solid ratio of the fluidized bed airflow mill, so that the embodiment of this specification can shorten the adjustment time of the gas-solid ratio and improve the adjustment efficiency of the gas-solid ratio.

[0059] In the embodiments of this specification, the standards (including standard compressed air flow, standard compressed air pressure and standard gas-solid ratio) corresponding to different types of materials to be crushed are different. Therefore, if the user changes the type of material to be crushed in the fluidized bed air mill, it is necessary to adjust the compressed air entering the fluidized bed air mill according to the standard compressed air flow and standard compressed air pressure corresponding to the new material to be crushed. Then, fix the flow parameters and pressure parameters of the compressed air entering the fluidized bed air mill, and adjust the feeding frequency of the fluidized bed air mill according to the standard gas-solid ratio corresponding to the new material to be crushed.

[0060] Based on this, the method of the embodiment of this specification may further include:

[0061] Get the user's input request to change the type of material to be crushed;

[0062] According to the request to change the type of material to be crushed, a second flow rate, a second standard compressed air pressure, and a second standard gas-solid ratio are obtained; the second flow rate is the standard compressed air flow rate corresponding to the new material to be crushed; the second standard gas-solid ratio is the standard gas-solid ratio corresponding to the new material to be crushed; and the standard compressed air pressure is the standard compressed air pressure corresponding to the new material to be crushed;

[0063] adjusting the flow rate of the compressed air entering the fluidized bed jet mill to the second flow rate;

[0064] adjusting the pressure of the compressed air entering the fluidized bed jet mill to the second standard compressed air pressure;

[0065] According to the second standard gas-solid ratio, the feeding frequency of the fluidized bed jet mill is adjusted so that the difference between the gas-solid ratio obtained after the adjustment and the second standard gas-solid ratio meets the first preset difference standard.

[0066] It should be noted that, while maintaining the flow rate of compressed air entering the fluidized bed jet mill, the method for adjusting the feed frequency of the fluidized bed jet mill to adjust the gas-to-solid ratio in this embodiment is the same as that in the above embodiment, and reference can be made to the above embodiment for details. Furthermore, the method for adjusting the compressed air pressure to the standard compressed air pressure is conventional and will not be further described here.

[0067] In the embodiments of this specification, since corresponding standard compressed air flow rates, standard compressed air pressures, and standard gas-to-solid ratios are pre-set for a variety of materials to be crushed, after the user changes the type of material to be crushed in the fluidized bed jet mill, the fluidized bed jet mill can quickly make relevant adjustments based on the relevant standards corresponding to the new material to be crushed. In addition, when the user uses the fluidized bed jet mill for the first time, the fluidized bed jet mill can also quickly make relevant adjustments based on the relevant standards corresponding to the material to be crushed. In this way, compared to the method of making relevant adjustments based on the fineness of the crushed product produced by the fluidized bed jet mill, the embodiments of this specification can shorten the time it takes for the fluidized bed jet mill to enter stable production.

[0068] In the embodiment of this specification, the request to change the type of material to be crushed may carry the second flow rate and the second standard gas-solid ratio.

[0069] In the present specification embodiment, a classifying wheel is provided in the fluidized bed air flow mill. The classifying wheel is used to separate the crushed material and the uncrushed material that meet a certain fineness requirement, and the classifying wheel motor 6 is used to drive the classifying wheel to separate the materials. The classifying wheel load (i.e., the operating current of the classifying wheel motor) is positively correlated with the weight of the material to be separated (crushed material and uncrushed material), and the fluidized bed air flow mill determines the classifying wheel load according to the weight of the material to be separated. Therefore, the classifying wheel load is on the small side, indicating that the weight of the material to be separated is on the small side, that is, indicating that the feeding frequency of the fluidized bed air flow mill is on the small side. At this time, the pulverizing efficiency of the fluidized bed air flow mill is lower. However, the classifying wheel load cannot be too large. If the classifying wheel load is too large, the fluidized bed air flow mill will easily malfunction, endangering the safety of the fluidized bed air flow mill.

[0070] Based on this, in order to improve the grinding efficiency of the fluidized bed jet mill while ensuring the safety of the fluidized bed jet mill, the method of the embodiment of this specification may further include:

[0071] If the difference between the gas-solid ratio of the fluidized bed jet mill and the first standard gas-solid ratio meets the first preset difference standard, obtaining the classifying wheel load of the fluidized bed jet mill;

[0072] calculating a second difference between the grading wheel load and a standard grading wheel load;

[0073] determining whether the second difference satisfies a second preset difference standard;

[0074] If the second difference does not meet the second preset difference standard, then while maintaining the gas-solid ratio of the fluidized bed jet mill unchanged, the flow rate of compressed air entering the fluidized bed jet mill and the feeding frequency of the fluidized bed jet mill are adjusted simultaneously, so that the difference between the classifying wheel load obtained after the adjustment and the standard classifying wheel load meets the second preset difference standard.

[0075] In the examples of this specification, reference is made to Figure 1 , the control device 1 can also be used to obtain the classifying wheel load of the classifying wheel motor 6 (i.e., the working current of the classifying wheel motor), use the classifying wheel load to subtract the standard classifying wheel load to obtain a second difference; judge whether the second difference meets the second preset difference standard; if the second difference does not meet the second preset difference standard, then send a first control instruction to the gas flow regulating device 2 according to the second difference, and send a second control instruction to the feeding device 7. When the first control instruction and the second control instruction are executed, they are used to achieve: while maintaining the gas-solid ratio of the fluidized bed air flow mill unchanged, simultaneously adjust the flow rate of compressed air entering the fluidized bed air flow mill and the feeding frequency of the fluidized bed air flow mill, so that the difference between the classifying wheel load obtained after the adjustment and the standard classifying wheel load meets the second preset difference standard. In this way, while ensuring the safety of the fluidized bed air flow mill, the crushing efficiency of the fluidized bed air flow mill is improved.

[0076] In the embodiments of this specification, determining whether the second difference satisfies the second preset difference standard may specifically be determining whether the absolute value of the second difference exceeds the second preset difference standard range, wherein the second preset difference standard range may be set by those skilled in the art according to actual needs.

[0077] In an embodiment of the present invention, if the second difference does not meet the second preset difference standard, then the control device 1 can determine whether the load of the classifying wheel is too large or too small based on the second difference, and adjust the flow rate of the compressed air entering the fluidized bed air jet mill and the feeding frequency of the fluidized bed air jet mill based on the judgment result. Specifically, if the second difference is less than 0, it indicates that the load of the classifying wheel is too small. In this case, while maintaining the gas-solid ratio of the fluidized bed air jet mill unchanged, the flow rate of the compressed air entering the fluidized bed air jet mill and the feeding frequency of the fluidized bed air jet mill are increased; if the second difference is greater than 0, it indicates that the load of the classifying wheel is too large. In this case, while maintaining the gas-solid ratio of the fluidized bed air jet mill unchanged, the flow rate of the compressed air entering the fluidized bed air jet mill and the feeding frequency of the fluidized bed air jet mill are reduced.

[0078] In the embodiment of this specification, step 206: if the first difference does not meet the first preset difference standard, adjusting the feeding frequency of the fluidized bed jet mill according to the first difference may specifically include:

[0079] If the absolute value of the first difference exceeds a first preset standard range of differences, a determination is made as to whether the first gas-to-solid ratio is greater than a first standard gas-to-solid ratio. If the first gas-to-solid ratio is greater than the first standard gas-to-solid ratio, the feed frequency of the fluidized bed jet mill is increased; if the first gas-to-solid ratio is less than the first standard gas-to-solid ratio, the feed frequency of the fluidized bed jet mill is decreased. The first preset standard range of differences can be set by a person skilled in the art based on actual circumstances.

[0080] In the embodiment of this specification, step 206: if the first difference does not meet the first preset difference standard, adjusting the feeding frequency of the fluidized bed jet mill according to the first difference may specifically include:

[0081] If the first difference is not equal to 0, it is determined whether the first gas-to-solid ratio is greater than a first standard gas-to-solid ratio. If the first gas-to-solid ratio is greater than the first standard gas-to-solid ratio, the feed frequency of the fluidized bed jet mill is increased; if the first gas-to-solid ratio is less than the first standard gas-to-solid ratio, the feed frequency of the fluidized bed jet mill is decreased.

[0082] In the embodiment of this specification, the control device 1 is further configured to determine a fault condition in the fluidized bed jet mill's feed pipeline based on the weight of the material within the fluidized bed jet mill body 5, as transmitted by the first weighing device 4, and the weight of the material to be crushed stored in the pre-storage bin 8, as transmitted by the second weighing device 9. Specifically, the first weighing device 4 and the second weighing device 9 continuously transmit their weighed weight data to the control device 1. The control device 1 can calculate a first weight change rate of the material within the fluidized bed jet mill body 5 based on the weight of the material within the fluidized bed jet mill body 5 received within a preset time period. The control device 1 can also calculate a second weight change rate of the material to be crushed stored in the pre-storage bin 8, based on the weight of the material to be crushed stored in the pre-storage bin 8 received within the preset time period. The control device 1 can then calculate the absolute value of the difference between the first weight change rate and the second weight change rate. If the absolute value is greater than a preset absolute value threshold, the control device 1 determines that the fluidized bed jet mill's feed pipeline has faulted. Otherwise, the control device 1 determines that the fluidized bed jet mill's feed pipeline has not faulted. The cause of the failure of the feed pipeline of the fluidized bed jet mill may be a blockage of the feed pipeline.

[0083] In the embodiments of this specification, a display device may be provided to display relevant data for user convenience, for example, the flow rate and pressure of the compressed air, the weight of the material in the fluidized bed jet mill, and the feeding frequency of the fluidized bed jet mill may be displayed on the display device.

[0084] Based on a general inventive concept, the embodiments of this specification further provide a gas-solid ratio control system, which is applied to the fluidized bed jet mill of the above embodiment. Figure 3 This is a schematic diagram of the structure of a gas-solid ratio control system provided in the embodiment of this specification. Figure 3 As shown, the gas-solid ratio control system includes:

[0085] A first flow rate acquisition module 31 is used to acquire a first flow rate of compressed air entering the fluidized bed jet mill;

[0086] The material weight obtaining module 32 in the fluidized bed jet mill is used to obtain the weight of the material in the fluidized bed jet mill;

[0087] a first gas-solid ratio calculation module 33 for calculating the ratio of the first flow rate to the weight of the material in the fluidized bed jet mill to obtain a first gas-solid ratio of the fluidized bed jet mill;

[0088] A first difference calculation module 34 is configured to calculate a first difference between the first gas-solid ratio and a first standard gas-solid ratio;

[0089] A first judging module 35 is configured to judge whether the first difference satisfies a first preset difference standard;

[0090] The first adjustment module 36 is used to adjust the feeding frequency of the fluidized bed air flow mill according to the first difference if the first difference does not meet the first preset difference standard, so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard; the feeding frequency is the frequency of feeding a preset weight of the material to be crushed into the fluidized bed air flow mill.

[0091] The system of the embodiment of this specification may further include:

[0092] A user request acquisition module is used to obtain a user input request to change the type of material to be crushed;

[0093] The user request analysis module is used to obtain a second flow rate and a second standard gas-solid ratio according to the request to change the type of material to be crushed; the second flow rate is a standard compressed air flow rate corresponding to the new material to be crushed; the second standard gas-solid ratio is a standard gas-solid ratio corresponding to the new material to be crushed;

[0094] a flow regulating module, configured to regulate the flow of the compressed air entering the fluidized bed jet mill to the second flow rate;

[0095] The second adjustment module is used to adjust the feeding frequency of the fluidized bed jet mill according to the second standard gas-solid ratio, so that the difference between the gas-solid ratio obtained after the adjustment and the second standard gas-solid ratio meets the first preset difference standard.

[0096] In the embodiment of the present specification, the user request analysis module can be specifically used to obtain the second flow rate and the second standard gas-solid ratio from the request to change the type of material to be crushed.

[0097] The system of the embodiment of this specification may further include:

[0098] a classifying wheel load acquisition module, configured to acquire the classifying wheel load of the fluidized bed jet mill if the difference between the gas-solid ratio of the fluidized bed jet mill and the first standard gas-solid ratio meets the first preset difference standard;

[0099] a second difference calculation module, configured to obtain a second difference by subtracting a standard grading wheel load from the grading wheel load;

[0100] A second judgment module, configured to judge whether the second difference satisfies a second preset difference standard;

[0101] and a third regulating module, configured to regulate, if the second difference does not meet the second preset difference standard, the flow rate of compressed air entering the fluidized bed jet mill and the feeding frequency of the fluidized bed jet mill while maintaining the gas-to-solid ratio of the fluidized bed jet mill unchanged, so that the difference between the classifying wheel load obtained after the adjustment and the standard classifying wheel load meets the second preset difference standard.

[0102] In the embodiments of this specification, the third adjustment module can be specifically used to:

[0103] If the second difference is less than 0, while maintaining the gas-to-solid ratio of the fluidized bed jet mill unchanged, the flow rate of compressed air entering the fluidized bed jet mill and the feeding frequency of the fluidized bed jet mill are increased simultaneously;

[0104] If the second difference is greater than 0, the flow rate of the compressed air entering the fluidized bed jet mill and the feeding frequency of the fluidized bed jet mill are reduced while maintaining the gas-to-solid ratio of the fluidized bed jet mill unchanged.

[0105] In the embodiment of this specification, the first adjustment module 36 can be specifically used to:

[0106] If the first difference is not equal to 0, the feeding frequency of the fluidized bed jet mill is adjusted according to the first difference.

[0107] In the embodiment of this specification, the first traffic acquisition module 31 can be specifically used to:

[0108] A first flow rate of compressed air entering the fluidized bed jet mill is obtained through a vortex flowmeter of the fluidized bed jet mill.

[0109] In the embodiment of this specification, the material weight acquisition module 32 in the fluidized bed jet mill can be specifically used to:

[0110] The weight of the material in the fluidized bed jet mill is obtained by an electronic weighing device in the fluidized bed jet mill.

[0111] For simplicity of description, the aforementioned method embodiments are described as a series of actions. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, as certain steps can be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also be aware that the embodiments described in this specification are preferred embodiments, and the actions and modules involved are not necessarily required for the present invention.

[0112] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similarities between the various embodiments can be referred to in conjunction with each other. For device embodiments, since they are generally similar to method embodiments, their description is relatively simple, and for relevant details, reference can be made to the description of the method embodiments.

[0113] The steps in the methods of the various embodiments of the present invention can be adjusted in sequence, combined, and deleted according to actual needs, and the technical features recorded in the various embodiments can be replaced or combined.

[0114] The modules and submodules in the devices and terminals of various embodiments of the present invention may be combined, divided, or deleted according to actual needs.

[0115] In the several embodiments provided herein, it should be understood that the disclosed terminals, devices, and methods can be implemented in other ways. For example, the terminal embodiments described above are merely illustrative. For example, the division of modules or submodules is merely a logical functional division. In actual implementation, other division methods may be used, such as combining or integrating multiple submodules or modules into another module, or omitting or not implementing certain features. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or modules via some interface, which may be electrical, mechanical, or other forms.

[0116] The modules or submodules described as separate components may or may not be physically separate, and the components of the modules or submodules may or may not be physical modules or submodules, that is, they may be located in one place or distributed across multiple network modules or submodules. Some or all of the modules or submodules may be selected to achieve the purpose of this embodiment according to actual needs.

[0117] In addition, the functional modules or submodules in the various embodiments of the present invention may be integrated into a single processing module, or each module or submodule may exist physically separately, or two or more modules or submodules may be integrated into a single module. The aforementioned integrated modules or submodules may be implemented in the form of hardware or software functional modules or submodules.

[0118] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0119] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, software units executed by a processor, or a combination of the two. The software units may be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0120] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0121] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas-solid ratio control method, applied to a fluidized bed jet mill, characterized in that: include: obtaining a first flow rate of compressed air entering the fluidized bed jet mill; Obtain the weight of the material in the fluidized bed jet mill; Calculating a ratio of the first flow rate to the weight of the material in the fluidized bed jet mill to obtain a first gas-to-solid ratio of the fluidized bed jet mill; calculating a first difference between the first gas-to-solid ratio and a first standard gas-to-solid ratio; determining whether the first difference satisfies a first preset difference standard; If the first difference does not meet the first preset difference standard, adjusting the feeding frequency of the fluidized bed jet mill according to the first difference so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard; the feeding frequency is the frequency of feeding a preset weight of the material to be crushed into the fluidized bed jet mill; If the difference between the gas-solid ratio of the fluidized bed jet mill and the first standard gas-solid ratio meets the first preset difference standard, obtaining the classifying wheel load of the fluidized bed jet mill; Subtracting a standard grading wheel load from the grading wheel load to obtain a second difference; determining whether the second difference satisfies a second preset difference standard; If the second difference does not meet the second preset difference standard, then while maintaining the gas-solid ratio of the fluidized bed jet mill unchanged, the flow rate of compressed air entering the fluidized bed jet mill and the feeding frequency of the fluidized bed jet mill are adjusted simultaneously, so that the difference between the classifying wheel load obtained after the adjustment and the standard classifying wheel load meets the second preset difference standard.

2. The method according to claim 1, characterized in that Also includes: Get the user's input request to change the type of material to be crushed; According to the request to change the type of material to be crushed, a second flow rate and a second standard gas-solid ratio are obtained; The second flow rate is the standard compressed air flow rate corresponding to the new material to be crushed; The second standard gas-solid ratio is the standard gas-solid ratio corresponding to the new material to be crushed; adjusting the flow rate of the compressed air entering the fluidized bed jet mill to the second flow rate; According to the second standard gas-solid ratio, the feeding frequency of the fluidized bed jet mill is adjusted so that the difference between the gas-solid ratio obtained after the adjustment and the second standard gas-solid ratio meets the first preset difference standard.

3. The method according to claim 2, characterized in that The request to change the type of material to be crushed carries the second flow rate and the second standard gas-solid ratio.

4. The method according to claim 1, wherein If the second difference does not meet the second preset difference standard, while maintaining the gas-to-solid ratio of the fluidized bed jet mill unchanged, the flow rate of compressed air entering the fluidized bed jet mill and the feeding frequency of the fluidized bed jet mill are adjusted simultaneously, specifically including: If the second difference is less than 0, while maintaining the gas-to-solid ratio of the fluidized bed jet mill unchanged, the flow rate of compressed air entering the fluidized bed jet mill and the feeding frequency of the fluidized bed jet mill are increased simultaneously; If the second difference is greater than 0, the flow rate of the compressed air entering the fluidized bed jet mill and the feeding frequency of the fluidized bed jet mill are reduced while maintaining the gas-to-solid ratio of the fluidized bed jet mill unchanged.

5. The method according to claim 1, wherein If the first difference does not meet the first preset difference standard, adjusting the feeding frequency of the fluidized bed jet mill according to the first difference, specifically including: If the first difference is not equal to 0, the feeding frequency of the fluidized bed jet mill is adjusted according to the first difference.

6. The method according to claim 1, characterized in that The step of obtaining a first flow rate of compressed air entering the fluidized bed jet mill specifically includes: A first flow rate of compressed air entering the fluidized bed jet mill is obtained through a vortex flowmeter of the fluidized bed jet mill.

7. The method according to claim 1, characterized in that The obtaining of the weight of the material in the fluidized bed jet mill specifically includes: The weight of the material in the fluidized bed jet mill is obtained by an electronic weighing device in the fluidized bed jet mill.

8. A gas-solid ratio control system, applied to a fluidized bed jet mill, characterized in that: include: A first flow acquisition module is used to acquire a first flow of compressed air entering the fluidized bed jet mill; A material weight acquisition module in a fluidized bed jet mill, used to acquire the weight of the material in the fluidized bed jet mill; a first gas-solid ratio calculation module, configured to calculate a ratio of the first flow rate to a weight of material in the fluidized bed jet mill, to obtain a first gas-solid ratio of the fluidized bed jet mill; a first difference calculation module, configured to calculate a first difference between the first gas-solid ratio and a first standard gas-solid ratio; A first judging module, configured to judge whether the first difference satisfies a first preset difference standard; a first adjustment module configured to adjust a feeding frequency of the fluidized bed jet mill according to the first difference, if the first difference does not meet the first preset difference standard, so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard; the feeding frequency is the frequency at which a preset weight of material to be pulverized is fed into the fluidized bed jet mill; a classifying wheel load acquisition module, configured to acquire the classifying wheel load of the fluidized bed jet mill if the difference between the gas-solid ratio of the fluidized bed jet mill and the first standard gas-solid ratio meets the first preset difference standard; a second difference calculation module, configured to obtain a second difference by subtracting a standard grading wheel load from the grading wheel load; A second judgment module, configured to judge whether the second difference satisfies a second preset difference standard; and a third regulating module, configured to regulate, if the second difference does not meet the second preset difference standard, the flow rate of compressed air entering the fluidized bed jet mill and the feeding frequency of the fluidized bed jet mill while maintaining the gas-to-solid ratio of the fluidized bed jet mill unchanged, so that the difference between the classifying wheel load obtained after the adjustment and the standard classifying wheel load meets the second preset difference standard.

9. A fluidized bed jet mill, characterized in that: include: A fluidized bed jet mill body, and a control device, a gas flow detection device and a first weighing device arranged on the fluidized bed jet mill body; The gas flow detection device and the first weighing device are electrically connected to the control device respectively; The gas flow detection device is used to obtain a first flow rate of compressed air entering the fluidized bed jet mill and send the first flow rate to the control device; The first weighing device is used to obtain the weight of the material in the fluidized bed jet mill and send the weight of the material in the fluidized bed jet mill to the control device; The control device is used to calculate the ratio of the first flow rate to the weight of the material in the fluidized bed jet mill to obtain a first gas-to-solid ratio of the fluidized bed jet mill; Calculating a first difference between the first gas-to-solid ratio and a first standard gas-to-solid ratio; and determining whether the first difference meets a first preset difference standard; If the first difference does not meet the first preset difference standard, the feeding frequency of the fluidized bed air flow mill is adjusted according to the first difference, so that the difference between the gas-solid ratio obtained after the adjustment and the first standard gas-solid ratio meets the first preset difference standard; the feeding frequency is the frequency of feeding a preset weight of material to be crushed into the fluidized bed air flow mill; if the difference between the gas-solid ratio of the fluidized bed air flow mill and the first standard gas-solid ratio meets the first preset difference standard, the classifying wheel load of the fluidized bed air flow mill is obtained; the classifying wheel load is subtracted from the standard classifying wheel load to obtain a second difference; it is determined whether the second difference meets the second preset difference standard; if the second difference does not meet the second preset difference standard, while maintaining the gas-solid ratio of the fluidized bed air flow mill unchanged, the flow rate of compressed air entering the fluidized bed air flow mill and the feeding frequency of the fluidized bed air flow mill are adjusted at the same time, so that the difference between the classifying wheel load obtained after the adjustment and the standard classifying wheel load meets the second preset difference standard.

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