A gas safety detection system, method and medium for a lithium battery rotary kiln

Abstract

This application applies to the field of lithium battery rotary kilns, providing a gas safety detection system, method, and medium for lithium battery rotary kilns. The system includes a first temperature module, a second temperature module, a first pressure module, a second pressure module, and a calculation module placed inside the kiln. It calculates the temperature and pressure differences inside and outside the kiln, stores a server with a model of the temperature and pressure difference relationship, and implements a rotary kiln heating system for heating or cooling the kiln. It also includes a valve module for controlling the opening of the rotary kiln's exhaust port. Based on the relationship model and the real-time temperature and pressure inside and outside the kiln, the system controls the rotary kiln heating system and valve module to regulate the temperature and pressure inside the kiln. This maintains the temperature and pressure ratio constant or fluctuates within a certain range while regulating the kiln pressure to a normal level, thereby improving gas safety inside the kiln.

Description

Technical Field

[0001] This application belongs to the field of lithium battery rotary kilns, and particularly relates to a gas safety detection system, method and medium for lithium battery rotary kilns. Background Technology

[0002] Rotary kilns are widely used in many manufacturing industries such as building materials, metallurgy, chemicals, and environmental protection. These rotary cylindrical devices are used to mechanically, physically, or chemically process solid materials. The application of rotary kilns originated in cement production. In 1824, British cement worker J. Asp invented the intermittent vertical kiln; in 1883, German Dietzsch invented the continuous multi-layer vertical kiln; and in 1885, Englishman E.R. Lansome invented the rotary kiln. After obtaining patents in Britain and the United States, he put it into production, quickly achieving considerable economic benefits. The invention of the rotary kiln led to the rapid development of the cement industry and also spurred research into its applications. Soon, rotary kilns were widely used in many industrial fields and became increasingly important in these production processes, becoming core equipment for their respective enterprises.

[0003] In the manufacturing process of lithium batteries, a rotary kiln is used to calcine the positive and negative electrode materials, as well as for the recycling of spent lithium batteries. The calcination process in the rotary kiln generates waste gas and causes sudden pressure changes within the kiln due to high temperatures. Therefore, the waste gas generated in the rotary kiln generally needs to be discharged promptly to prevent kiln explosions and safety accidents. The most common and direct method to solve this problem is to monitor the pressure inside the rotary kiln and thus control the exhaust volume. However, controlling the kiln pressure by controlling the exhaust volume has the following drawbacks:

[0004] 1) Pressure has a direct impact on the temperature inside the kiln. If the pressure changes, the critical temperature under normal working conditions inside the kiln will change, thus affecting the normal operation of the kiln.

[0005] 2) If a sudden change in pressure occurs, forcibly reducing the pressure by depressurization will increase the safety risks of the exhaust port, which may lead to the exhaust port collapsing or even the kiln exploding. Summary of the Invention

[0006] In view of this, embodiments of this application provide a gas safety detection system, method and medium for a lithium battery rotary kiln, which reasonably adjusts the kiln pressure to improve gas safety while ensuring that the kiln temperature is maintained under normal operating conditions.

[0007] The first aspect of this application provides a gas safety detection system for a lithium battery rotary kiln, comprising:

[0008] The first temperature module, placed inside the kiln, is used to detect the temperature inside the kiln, and the second temperature module, placed outside the kiln, is used to detect the temperature outside the kiln.

[0009] The first pressure module, placed inside the kiln, is used to detect the pressure inside the kiln, and the second pressure module, placed outside the kiln, is used to detect the pressure outside the kiln.

[0010] The calculation module responds to the first temperature module, the second temperature module, the first pressure module, and the second pressure module to calculate the temperature difference and pressure difference inside and outside the kiln;

[0011] The server stores a model of the relationship between temperature difference and pressure difference. Where ΔT represents the temperature difference and ΔP represents the pressure difference;

[0012] A rotary kiln heating system for heating or cooling the rotary kiln, and a valve module for controlling the opening of the rotary kiln exhaust port.

[0013] The control module controls the rotary kiln heating system and valve module based on the relationship model and the real-time temperature and pressure inside and outside the kiln to achieve temperature and pressure regulation inside the rotary kiln, and regulates the pressure inside the kiln to a normal level while keeping K constant or fluctuating within a certain range.

[0014] The gas safety detection system for lithium battery rotary kilns provided in this application is based on the ratio of the internal and external temperature difference and pressure difference under normal or standard operating conditions of the lithium battery rotary kiln. Traditional gas safety detection systems often only focus on the internal pressure and temperature of the kiln, ignoring the ambient temperature and pressure. However, the principle of pressure difference is what truly leads to safety hazards. For example, everyone has experienced that some sealed food packages will burst open when they are placed in high-altitude or high-velocity areas. Obviously, the pressure inside the packaging bag does not change; what changes is the pressure difference. Therefore, this application realizes the safe gas detection inside the rotary kiln based on this principle, which can eliminate safety accidents caused by excessive focus on the pressure itself. By adopting the concept of relative pressure and combining it with the internal temperature of the kiln, the pressure inside the kiln is controlled under the premise of maintaining the normal operating temperature of the rotary kiln, thereby improving the reliability of gas safety detection in the rotary kiln.

[0015] Furthermore, the value of K is the ratio of the temperature difference ΔT to the pressure difference ΔP under normal operating conditions of the rotary kiln. Here, "operating conditions" refers to a normal ambient temperature, normal ambient pressure, and both the kiln's internal temperature and pressure falling within the required normal range or standard.

[0016] Furthermore, the temperature and pressure inside the rotary kiln are adjusted in stages during the regulation process, with a priority given to pressure, gradually adjusting the pressure inside the kiln to a normal level.

[0017] Furthermore, the specific process of the phased adjustment is as follows:

[0018] Based on the real-time pressure inside the kiln detected by the first pressure module and the standard pressure under normal conditions of the rotary kiln, the pressure increment is calculated.

[0019] The pressure increment is divided into N adjustments until the pressure increment is 0. During the adjustment process, based on the principle that pressure regulation is better than temperature regulation, the kiln temperature is adjusted once for each adjustment of the kiln pressure, so as to keep K constant or fluctuate within a certain range.

[0020] Using segmented pressure increments avoids temperature changes caused by sudden pressure changes, or in other words, prevents temperature mismatches within the kiln after a sudden pressure change. Common sense dictates that as pressure increases, the critical temperature a sealed container can withstand also rises, similar to the principle of a pressure cooker. Therefore, a sudden pressure drop would inevitably cause the kiln temperature to exceed the critical temperature, leading to safety hazards. Thus, segmented pressure and temperature adjustments are necessary to ensure kiln safety. The principle of pressure limitation dictates that a decrease in pressure lowers the critical temperature, allowing excessively high temperatures to be expelled as high-temperature exhaust gas from the rotary kiln. Therefore, pressure must be prioritized. If temperature were prioritized, even after temperature adjustment, the kiln temperature would continue to rise because the pressure hasn't decreased, and the rotary kiln maintains a constant heating state. Therefore, pressure adjustment must be prioritized.

[0021] Furthermore, during the kiln pressure regulation process, the pressure increments are adjusted sequentially from small to large based on an arithmetic progression.

[0022] Furthermore, the server adopts a RISC architecture and offers three types of server options: local server, remote server, and cloud server.

[0023] A second aspect of this application provides a gas safety detection method for a lithium battery rotary kiln. This method is executed based on the aforementioned gas safety detection system for a lithium battery rotary kiln, and includes:

[0024] Pre-detection;

[0025] S101: Under standard operating conditions of the rotary kiln, detect the internal and external temperature difference and pressure difference of the rotary kiln, and calculate... Where ΔT represents the temperature difference and ΔP represents the pressure difference;

[0026] S102: Real-time monitoring of the pressure inside the rotary kiln. When the pressure exceeds the set threshold, the safety detection system is triggered and adjusted accordingly.

[0027] The gas safety detection methods performed by the safety detection system are as follows:

[0028] S103: Calculate the pressure increment inside the rotary kiln and divide the pressure increment into N segments for adjustment;

[0029] S104: Each adjustment of a pressure increment corresponds to an adjustment of the kiln temperature, so that K remains constant or fluctuates within a certain range;

[0030] S105: Repeat step S104 N times until the pressure increment is 0;

[0031] S106: Repeat steps S101-S105 to repeatedly perform gas safety checks inside the rotary kiln.

[0032] Furthermore, the statement that K remains constant or fluctuates within a certain range includes:

[0033] Based on the principle that pressure regulation is better than temperature regulation, the pressure and temperature inside the rotary kiln are adjusted simultaneously to keep K constant, or the pressure inside the rotary kiln is adjusted first and then the temperature is adjusted to make K fluctuate within a certain range.

[0034] Furthermore, the pressure increments are adjusted sequentially according to an arithmetic progression.

[0035] A third aspect of this application provides a medium, a computer-readable storage medium storing a computer program, which, when run on a terminal device, causes the system device to perform the functions described in any one of the first aspects. The medium is a computer-readable storage medium storing a computer program, characterized in that, when executed by a main control module, the computer program implements various steps of a gas safety detection method, such as that for a lithium battery rotary kiln.

[0036] It is understood that the beneficial effects of the second and third aspects mentioned above can be found in the relevant descriptions in the first aspect above, and will not be repeated here.

[0037] The beneficial effects of this application embodiment compared with the prior art are as follows: Compared with traditional gas safety detection, this application adopts a relative pressure relationship model and a segmented and orderly adjustment method to detect and control the pressure inside the kiln, which can improve the reliability and safety of rotary kiln safety gas detection. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art 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.

[0039] Figure 1 This is a schematic diagram of the gas safety detection system for a lithium battery rotary kiln provided in an embodiment of this application;

[0040] Figure 2 This is a schematic flowchart of the gas safety detection method for a lithium battery rotary kiln provided in the embodiments of this application;

[0041] Figure 3 This is a schematic diagram of the structure of the terminal device provided in the embodiments of this application. Detailed Implementation

[0042] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0043] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0044] Example 1

[0045] The first aspect of this application provides a gas safety detection system for a lithium battery rotary kiln, referring to... Figure 1 As shown, the system includes: a first temperature module 11 placed inside the kiln for detecting the temperature inside the kiln, and a second temperature module 12 placed outside the kiln for detecting the temperature outside the kiln; a first pressure module 13 placed inside the kiln for detecting the pressure inside the kiln, and a second pressure module 14 placed outside the kiln for detecting the pressure outside the kiln; a calculation module 15, responding to the first temperature module 11, the second temperature module 12, the first pressure module 13, and the second pressure module 14 to calculate the temperature difference and pressure difference inside and outside the kiln; and a server 16 storing a relationship model between the temperature difference and the pressure difference. Where ΔT represents the temperature difference and ΔP represents the pressure difference; the rotary kiln heating system 18 is used to heat or cool the rotary kiln, and the valve module 19 is used to control the opening of the rotary kiln exhaust port; the control module 17 controls the rotary kiln heating system 18 and the valve module 19 based on the relational model and the real-time temperature and pressure inside and outside the kiln to achieve temperature and pressure regulation inside the rotary kiln, and regulates the pressure inside the kiln to a normal level while keeping K constant or fluctuating within a certain range.

[0046] It is worth noting that the gas safety detection system for the lithium battery rotary kiln provided in this embodiment is based on the rotary kiln system for gas safety detection, which means that it requires a device composed of necessary hardware structures such as the rotary kiln heating system 18 including the rotary kiln and the valve module 19.

[0047] On the other hand, the pressure modules (first pressure module 13 and second pressure module 14) in this embodiment are essentially pressure sensors, which are among the most widely used types of sensors. Traditional pressure sensors are mainly mechanical devices that indicate pressure through the deformation of elastic elements, but these structures are large, heavy, and cannot provide electrical output. With the development of semiconductor technology, semiconductor pressure sensors have emerged. They are characterized by small size, light weight, high accuracy, and good temperature characteristics. Especially with the development of MEMS technology, semiconductor sensors are becoming increasingly miniaturized, and they also offer low power consumption and high reliability. Therefore, in this embodiment, semiconductor pressure sensors, which are primarily based on semiconductor technology, are preferably used as the pressure modules.

[0048] Preferably, in this embodiment, the control module 17 is essentially a controller, which is a master command device that controls the starting, speed regulation, braking, and reversing of the motor by changing the wiring of the main circuit or control circuit and changing the resistance value in the circuit according to a predetermined sequence. It consists of a program counter, instruction register, instruction decoder, timing generator, and operation controller. It is the "decision-making body" that issues commands, that is, it coordinates and directs the operation of the entire computer system. The computer program executed by the controller is based on... Figure 2The flowchart shown illustrates the gas safety detection method for a lithium battery rotary kiln. Controllers are divided into combinational logic controllers and microprogrammed controllers, each with its own advantages and disadvantages. Combinational logic controllers are cumbersome to design and have complex structures; once designed, they cannot be modified or expanded, but they are fast. Microprogrammed controllers are easy to design and have simple structures; they are easy to modify or expand. Modifying the function of a machine instruction only requires rewriting the corresponding microprogram; adding a machine instruction only requires adding a microprogram to the control memory, but it is done by executing a microprogram. A specific comparison is as follows: Combinational logic controllers, also known as hardwired controllers, are composed of logic circuits and rely entirely on hardware to implement the function of instructions. Since the relational model provided in this application is a fixed model, K is fixed for a certain application scenario; therefore, a combinational logic controller is preferred in this embodiment.

[0049] Optionally, in some embodiments, K is taken as the ratio of the temperature difference ΔT to the pressure difference ΔP under normal operating conditions of the rotary kiln. Normal operating conditions refer to the condition where, under normal circumstances, the temperature and pressure within the kiln are at the normal levels of the current application environment, and the temperature and pressure inside the rotary kiln meet the normal levels of the operating parameters. In other words, in different application scenarios or environments, the value represented by this normal operating condition is not a fixed data point, but rather represents a state data point.

[0050] Optionally, in some embodiments, the temperature and pressure in the rotary kiln are adjusted in stages, with a priority given to pressure, gradually adjusting the pressure in the kiln to a normal level.

[0051] More specifically, the phased adjustment process is as follows: based on the real-time pressure inside the kiln detected by the first pressure module 13 and the standard pressure under normal conditions of the rotary kiln, the pressure increment is calculated; the pressure increment is divided into N adjustments until the pressure increment is 0. During the adjustment process, based on the principle that pressure regulation is better than temperature regulation, the kiln temperature is adjusted once for each adjustment of the kiln pressure to ensure that K remains constant or fluctuates within a certain range.

[0052] Optionally, in some embodiments, the pressure regulation process within the kiln is based on the pressure increment being adjusted sequentially from small to large using an arithmetic progression. In an example demonstration, when the pressure increment is 900 Pa, it can be adjusted sequentially in increments of 100 Pa, 300 Pa, and 500 Pa. That is, the N value mentioned above is 3; the first adjustment is a reduction of 100 Pa, the second 300 Pa, and the third 500 Pa. After three adjustments, the pressure increment of 900 Pa returns to 0. In actual regulation, N can be set as large as possible to make the gradient of each adjustment finer, thereby achieving higher safety standards.

[0053] Optionally, in some embodiments, server 16 adopts a RISC architecture server, and the type of server 16 includes three options: local server, remote server, and cloud server. The server type can be reasonably selected according to the scale of the application scenario. For example, a remote server or cloud server can be used in a large factory area, while a local server is selected for some small factories. Servers can be divided into two major categories: IA architecture servers and RISC architecture servers. This application mainly uses a RISC architecture server, and the CPU used is a so-called Reduced Instruction Set Computing (RISC) processor. The main feature of RISC CPUs is that they use fixed-length instructions and use pipelined instruction execution. Thus, the processing of an instruction can be divided into several stages. The processor sets up different processing units to execute different stages of the instruction. For example, if instruction processing is divided into three stages, when the Nth instruction is in the third processing stage, the N+1th instruction will be in the second processing stage, and the N+2th instruction will be in the first processing stage. This pipelined instruction processing method enables the CPU to process instructions in parallel, which allows the processor to process more instructions per unit time. At the same time, the server in this application is also equipped with a large-capacity storage space to store the corresponding data.

[0054] The second aspect of this application provides a gas safety detection method for a lithium battery rotary kiln. This method is implemented based on a gas safety detection system for a lithium battery rotary kiln, such as... Figure 2 It includes, as shown:

[0055] Pre-detection;

[0056] S101: Under standard operating conditions of the rotary kiln, detect the internal and external temperature difference and pressure difference of the rotary kiln, and calculate... Where ΔT represents the temperature difference and ΔP represents the pressure difference;

[0057] S102: Real-time monitoring of the pressure inside the rotary kiln. When the pressure exceeds the set threshold, the safety detection system is triggered and adjusted accordingly.

[0058] The gas safety detection methods performed by the safety detection system are as follows:

[0059] S103: Calculate the pressure increment inside the rotary kiln and divide the pressure increment into N segments for adjustment;

[0060] S104: Each adjustment of a pressure increment corresponds to an adjustment of the kiln temperature, so that K remains constant or fluctuates within a certain range;

[0061] S105: Repeat step S104 N times until the pressure increment is 0;

[0062] S106: Repeat steps S101-S105 to repeatedly perform gas safety checks inside the rotary kiln.

[0063] The gas safety detection method for a lithium battery rotary kiln provided in this embodiment uses fixed logic stored in the control module 17 of the gas safety detection system for the lithium battery rotary kiln. This allows the control module 17 to execute the gas safety detection method for the lithium battery rotary kiln as described above. This fixed logic can be implemented using a computer program or control logic instructions similar to those of a PLC. Preferably, this embodiment uses PLC logic language for control to simplify programming and operation, making it easier to apply in industrial systems.

[0064] Furthermore, keeping K constant or fluctuating within a certain range includes, based on the principle that pressure regulation is superior to temperature regulation, simultaneously adjusting the pressure and temperature within the rotary kiln to keep K constant, or first adjusting the pressure within the rotary kiln and then adjusting the temperature to allow K to fluctuate within a certain range. Obviously, adjusting both pressure and temperature increments simultaneously yields the best results, but this exponentially increases the computational complexity of the control module. Moreover, this embodiment preferably uses a combinational logic controller; therefore, to simplify the computation as much as possible, a fixed logic of first adjusting the pressure within the rotary kiln and then adjusting the temperature is adopted to better facilitate machine language compilation.

[0065] More specifically, in this embodiment, the pressure increment is adjusted sequentially according to an arithmetic progression. The specific adjustment method can be referred to the adjustment method in the gas safety detection system of the lithium battery rotary kiln mentioned above.

[0066] A third aspect of this application provides a medium, a computer-readable storage medium storing a computer program, which, when run on a terminal device, causes the system device to perform any of the functions described in the first aspect. The medium is a computer-readable storage medium storing a computer program, characterized in that, when executed by a main control module, the computer program implements various steps of a gas safety detection method, such as that for a lithium battery rotary kiln.

[0067] Figure 3 This is a schematic diagram of the terminal device provided in an embodiment of this application. For example... Figure 3 As shown, the terminal device in this embodiment includes a processor 60, a memory 61, and a computer program 62 stored in the memory 61 and executable on the processor 60, such as a push notification program. When the processor 60 executes the computer program 62, it implements the steps in the above-described embodiments of the feature point extraction methods for various dynamic scenarios, for example... Figure 2 The steps S101 to S107 are shown. Alternatively, when the processor 60 executes the computer program 62, it implements the functions of each module / unit in the above-described device embodiments.

[0068] For example, computer program 62 can be divided into one or more modules / units, one or more of which are stored in memory 61 and executed by processor 60 to complete this application. One or more modules / units can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of computer program 62 in a terminal device. For example, computer program 62 can be divided into an acquisition module, a parsing module, a search module, and a push module, with the specific functions of each module as follows:

[0069] The terminal device can be a desktop computer, laptop, handheld computer, or other computing device. The terminal device may include, but is not limited to, a processor 60 and a memory 61. Those skilled in the art will understand that... Figure 3 This is merely an example of a terminal device and does not constitute a limitation on the terminal device. It may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, a terminal device may also include input / output devices, network access devices, buses, etc.

[0070] The processor 60 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0071] The memory 61 can be an internal storage unit of the terminal device, such as the hard drive or RAM of the terminal device. The memory 61 can also be an external storage device of the terminal device, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, the memory 61 can include both internal and external storage units of the terminal device. The memory 61 is used to store computer programs and other programs and data required by the terminal device. The memory 61 can also be used to temporarily store data that has been output or will be output.

[0072] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0073] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0074] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0075] In the embodiments provided in this application, it should be understood that the disclosed terminal devices and methods can be implemented in other ways. For example, the terminal device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0076] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0077] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0078] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0079] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A gas safety detection system for a lithium battery rotary kiln, characterized by, include: The first temperature module, placed inside the kiln, is used to detect the temperature inside the kiln, and the second temperature module, placed outside the kiln, is used to detect the temperature outside the kiln. The first pressure module, placed inside the kiln, is used to detect the pressure inside the kiln, and the second pressure module, placed outside the kiln, is used to detect the pressure outside the kiln. The calculation module responds to the first temperature module, the second temperature module, the first pressure module, and the second pressure module to calculate the temperature difference and pressure difference inside and outside the kiln; The server stores a relationship model of temperature difference and pressure difference, i.e. , wherein ΔT represents the temperature difference, and ΔP represents the pressure difference. A rotary kiln heating system for heating or cooling the rotary kiln, and a valve module for controlling the opening of the rotary kiln exhaust port. The control module controls the rotary kiln heating system and valve module based on the relationship model and the real-time temperature and pressure inside and outside the kiln to achieve temperature and pressure regulation inside the rotary kiln, and regulates the pressure inside the kiln to a normal level while keeping K constant or fluctuating within a certain range.

2. The gas safety detection system of a lithium battery rotary kiln according to claim 1, characterized in that: The value of K is the ratio of the temperature difference ΔT to the pressure difference ΔP under normal operating conditions of the rotary kiln.

3. The gas safety detection system for a lithium battery rotary kiln according to claim 1, characterized in that: The temperature and pressure inside the rotary kiln are adjusted in stages, with pressure taking priority, gradually adjusting the pressure inside the kiln to a normal level.

4. The gas safety detection system for a lithium battery rotary kiln according to claim 3, characterized in that, The specific process of the phased adjustment is as follows: the pressure increment is calculated based on the real-time pressure inside the kiln detected by the first pressure module and the standard pressure under normal conditions of the rotary kiln. The pressure increment is divided into N adjustments until the pressure increment is 0. During the adjustment process, based on the principle that pressure regulation is better than temperature regulation, the kiln temperature is adjusted once for each adjustment of the kiln pressure, so as to keep K constant or fluctuate within a certain range.

5. The gas safety detection system for a lithium battery rotary kiln according to claim 4, characterized in that: During the kiln pressure regulation process, the pressure increments are adjusted sequentially from small to large in an arithmetic progression.

6. The gas safety detection system for a lithium battery rotary kiln according to claim 1, characterized in that: The server adopts a RISC architecture and offers three types of options: local server, remote server, and cloud server.

7. A gas safety detection method for a lithium battery rotary kiln, characterized in that, This method is performed based on a gas safety detection system for a lithium battery rotary kiln as described in any one of claims 1 to 6, and includes: pre-detection; S101: Under standard operating conditions of the rotary kiln, detect the internal and external temperature difference and pressure difference of the rotary kiln, and calculate... , where ΔT represents the temperature difference and ΔP represents the pressure difference; S102: Real-time monitoring of the pressure inside the rotary kiln. When the pressure exceeds the set threshold, the gas safety detection system is triggered and adjusted accordingly. The gas safety detection methods performed by the gas safety detection system are as follows: S103: Calculate the pressure increment inside the rotary kiln and divide the pressure increment into N segments for adjustment; S104: Each adjustment of a pressure increment corresponds to an adjustment of the kiln temperature, so that K remains constant or fluctuates within a certain range; S105: Repeat step S104 N times until the pressure increment is 0; S106: Repeat steps S101 to S105 to repeatedly perform gas safety checks inside the rotary kiln.

8. The gas safety detection method for a lithium battery rotary kiln according to claim 7, characterized in that, The statement that K remains constant or fluctuates within a certain range includes: The pressure and temperature inside the rotary kiln are adjusted synchronously to keep K constant, or based on the principle that pressure regulation is better than temperature regulation, the pressure inside the rotary kiln is adjusted first and then the temperature inside the rotary kiln is adjusted so that K fluctuates within a certain range.

9. A gas safety detection method for a lithium battery rotary kiln according to claim 8, characterized in that, The pressure increments are adjusted sequentially according to an arithmetic progression.

10. A medium, said medium being a computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the main control module, it implements the steps of the method as described in any one of claims 7 to 9.

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