Control Device Design And Storage Application Of Nitrogen Doped 3D Active Graphene

With the development of technology and economy,chemical products have been widely used in various fields,and at the same time,higher requirements for the quality of chemical products and process automation are also put forward.High temperature synthesis reaction furnaces(muffle furnace and tube furnace)is the core equipment of chemical materials,although the temperature control has been very mature,but the research on the control of reaction volume and pressure is very rare.Based on this,this paper intends to construct a volume-controllable reaction crucible for muffle furnace and focus on the design of a pressure automatic control system for tube atmosphere furnace.Taking one of the currently popular chemical products——nitrogen-doped three-dimensional active graphene energy storage material as the application object,the above control device has been tested and run in a comprehensive way.In the early literature review,the development status of chemical synthesis process control is summarized.Through automatic control theory and technology's rational utilization,every link and various parameters of chemical synthesis can realize automatic operation,automatic analysis and automatic regulation.The small single chip microcomputer based on STM32 not only retains the simple type and stability and has the advantages of high performance.By combining other equipment(PID controller,sensor,execution module)it can realize the automatic control of specific processes and functions(such as level,humidity,pressure and so on).Through the analysis of the system,theory and technology of process control,the relevant methods and theories have been accumulated,and the favorable conditions for the experiment are established.In order to achieve micro-positive pressure synthesis by high temperature tube atmosphere furnace,a pressure automatic control system based on single chip microcomputer is designed and implemented in this paper.The main chip of MCU is selected based on STM32 microprocessor with Cortex-M3 core.The hardware structure of the automatic pressure control system is introduced in detail,which is composed of high temperature tube atmosphere furnace,pressure control electronic switch,solenoid valve,gas flowmeter and so on.The key structure of pressure control comprises a main control module(STM32 controller),temperature detection and control module(pressure sensor and PID controller),detection module(pressure real-time monitoring),execution module(solenoid valve),power module(internal power and external power supply).The system hardware design adopts the modular mechanism,each module is independent of each other,so as to facilitate the maintenance and upgrade of the system.In addition,we also build a volume-controllable reaction crucible based on three phase asynchronous motor,stroke switch and microcomputer time control switch.Finally,through the design and synthesis of "nitrogen-doped three-dimensional active graphene",the above pressure control and volume control device has been comprehensively tested and applied in practice.Through the implementation of various technological processes,such as device design,controllable preparation,performance testing and energy storage applications,the desired design goals for efficient control devices is basically achieved.This paper covers a wide range of theoretical knowledge and technology in control,mechanical,chemical and material fields,and belongs to the interdisciplinary product of multidisciplinary theory and practice.