Ethylene glycol is a unique synthetic material. In the actual chemical production process, it is regarded as a chemical preparation material with basic properties. In daily use, it itself is used in polyester. The output process, under certain conditions, can be used to prepare antifreeze in certain specifications. In the process of industrial production and synthesis, it has a unique process in the production process. It uses petroleum ethylene, which is refined and then hydrolyzed to obtain ethylene glycol. However, in the actual production process, it can be known that since it consumes a relatively large amount of oil, it is not consistent with my country's current energy structure and the concepts of sustainable development and environmental protection.
1 Key points of the experiment
1.1 Rational utilization of catalysts
In the process of conducting experiments, in the past, the main focus of the utilization of silica sol was to analyze its own acid properties. This is a kind of silicon source that exists in itself. It has a certain pH. However, in actual use, if its own acidic pH is greater than 2.5, it will have certain adverse effects on the experimental results. Therefore, it is required to control its own acidity. In most cases, a precipitant is used when conducting experiments. The main specification of this precipitant is sodium carbonate that has been specified or sodium hydroxide within the range of raw materials. In the process of obtaining the catalyst, the main experimental process is:
(1) Put 1mol/L silica sol into the experimental equipment and let it react with nitrate which has metallic properties;
(2) During the experiment, gradually add an appropriate amount of the fluid solution required for other experiments based on the rationality of the experiment and the actual conditions of the experiment;
(3) Mechanically stir the obtained solution. During the stirring process, a certain amount of alkaline substance needs to be added to the mixed substance to adjust the pH value of the mixed substance so that it has its own pH value. The pH can reach neutral, that is, 6.9±0.1;
(4) Aging the above solution for 1 hour, and then precipitating it with hot water, in the end a new configuration material can be obtained, which can be washed, filtered, dried and other processes. Finally, Roast it.
1.2 Intrinsic characterization of preparations
In the process of preparation, physical adsorption instrument is often used. This adsorption instrument itself can measure the unique properties of the preparation, such as its own surface area, surface pore structure, etc. Make a determination. During the experiment, the conventional static method can also be used. This method can effectively measure its own inherent isotherm. In the process of measurement, it mainly includes the adsorption of substances and the corresponding desorption isotherm. Line and so on. However, it is required that the experimental samples need to be strengthened and dried before actual measurement. After experiencing these processing methods, based on the actual results, equations are formulated, and the experimental results are analyzed and discussed. Only in this way can the unique distribution of pores in the sample be truly identified.
1.3 Analysis of preparation performance
During the experiment, the configuration facilities of the fixed bed need to be strictly controlled by the relevant responsible personnel. Especially in the configuration of the fixed bed reactor, the person in charge of the instrument needs to put his own The length is fixed, and its length is required to be 590mm and the inner diameter is 13ram; the material selected for the reactor is 304 stainless steel. When conducting experiments, weigh the preparation configuration of 59 and place it in the reactor in the constant temperature section; in order to ensure the effect of the preparation, an appropriate amount of quartz sand needs to be placed in the upper and lower parts of the constant temperature section. Add a specified amount of catalyst before starting the reaction in the experiment, and then carry out a standardized temperature-raising reduction procedure. After the reduction is completed, adjust the temperature of the constant temperature section to the reaction temperature; combine dimethyl oxalate and methanol with each other, and oxalic acid The concentration of dimethyl ester is controlled at 20% to 25%; use the metering pump in the test device to place the reactants in the vaporizer, use itself to fuse in the reaction bed, and use the reduction catalytic reaction to carry out ethylene glycol preparation. After the experiment is completed, the exhaust gas produced during the experiment needs to be cooled down in a water bath, and then placed in a cold trap for storage. It is necessary to analyze the remaining substances with liquid phase properties and check them using a gas chromatograph. During the inspection process, the flame inspection process must be carried out.
2 Analyze the structure of the preparation
In the actual production process, around the preparation, the ethylene glycol needed for the experiment can be obtained through a series of chemical reactions. However, due to its own loss, the quality and efficiency of coal mining work can be improved, and energy conservation and environmental protection can be achieved. Requirements and standards.
3.3 Application in coal mine water pumps
The application of variable frequency control technology in mining area liquid pumps and water supply pumps can ensure that the entire water pump can operate safely and stably, strengthen the control of the entire operation process of the water supply pump, and ensure that the water pump can operate at a stable and smooth status, increase the flexibility of the entire coal mine mining work, improve the quality and efficiency of the mining work, and avoidWater pump friction occurs during operation. The application of variable frequency control technology in water pump equipment can avoid impact on the equipment during operation, ensure the safety of operators' lives and property, and extend the service life of the equipment. In short, frequency conversion control technology has been widely used in the coal mining industry and has achieved good results. At the same time, this technology has great development space and prospects in the future. In recent years, China's economic level has gradually improved. The use of variable frequency control technology to improve the energy saving level of the coal mining industry has become an inevitable trend for the future development of China's coal mining industry, and has played a very important role in the development of China's coal mining industry. The application of variable frequency control technology in coal mining can promptly discover problems existing in the development process of the coal mining industry, and formulate effective solutions to them, strengthen the management of the coal mining working environment, improve the quality and efficiency of coal mining work, and is in line with today's Social energy conservation, emission reduction, and building a friendly social development need.
3.4 Application in hoists
In coal mine mechanical and electrical engineering, hoists have a wide range of applications. Hoists can effectively ensure the transportation quality of coal, reduce the workload of mining workers, and further improve the work quality of coal mining personnel. In order to ensure better development of coal resources, mining personnel need to adopt advanced frequency conversion technology to effectively ensure the quality of coal transportation. As the depth of coal mining continues to increase, the requirements for hoists are also increasing. Miners need to use advanced frequency conversion technology based on the depth of coal mining to reasonably control the operating speed of the hoist to ensure the quality of coal transportation. During the operation of the elevator, the application of advanced frequency conversion technology can effectively ensure that the operating speed of the elevator is better controlled and reduce the waste of coal resources. Due to the complex internal structure of the hoist, automatic functions are basically not possible during the lifting process, and mining personnel need to install auxiliary facilities. Applying frequency conversion technology to the elevator can continuously improve the stability of the elevator and ensure the effective utilization of coal resources. In addition, applying frequency conversion equipment to the elevator can effectively ensure the reliable operation of the relay equipment in the elevator, reduce the number of operations of the relay equipment, and further improve the utilization of various resources. Applying frequency conversion technology to the elevator can ensure the accurate lifting and lowering of the elevator, reduce equipment wear and extend the service life of the elevator.
3.5 Application in underground winch control
The variable frequency control technology itself has an automatic torque boost function. When operating at low frequency, it can accurately ensure the effective operation of the full rated torque and protect each component from overheating. The quick-opening method is used in the control box, and a dual PLC fully digital control system is used for electrical control. The hardware circuits complement each other to provide winch lifting control and digital monitoring, and in the event of a PLC failure, components can be upgraded technically. Configure normal operation in the control system and set up various protection devices, among which the over-winding device, speed limiting device and acceleration function protection become independent two-line modes. At the same time, it still needs to have the function of protecting the test. The car cannot be started without sending a signal, and the memory of the number of times the signal is sent should be greater than 30 days, so that the sound and light signals and the control loop have a locking function, and the indicators such as current and temperature can also be relatively intuitive.
4 Conclusion
In short, traditional electromechanical equipment can no longer meet the various needs of current society, which has prompted the emergence of frequency conversion technology in mining operations. On the one hand, it improves the reliability of the mining environment, and more effectively integrates operational convenience and energy saving into daily work. On the premise of satisfying our scientific outlook on development, it effectively improves the overall efficiency level of the mining industry and provides a basis for future development of various industries. Technology extension has paved the way to improve the existing criticisms of the technology itself. At the same time, it has also caused other industries in society to apply emerging technologies, ensuring that industrial production is moving in the right direction.
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