In recent years, my countrys urban gas industry has developed rapidly, urban gas has been rapidly popularized, and the use of urban gas has increased significantly.On the one hand, it has promoted the rapid economic growth, improves the quality of life of residents, and reduces environmental pollution; on the other hand, more and more gas accidents have also brought huge losses to residents lives and property, becoming the attention of the gas industrys attentionHot spots.
The working principle of gas turbine
In the main processes of air and gas, the gas turbine cycle consisting of the three major parts of the three pieces of gas, the combustion (Combustor), and the gas is called a simple cycle.Most gas turbines adopt a simple cycle solution.
The working process of the gas turbine is that the compressor (that is, the compressor) continuously inhaled the air from the atmosphere and compressed it; the compressed air entered the combustion room, mixed with the sprayed fuel, burned, and became a high temperature gas.The medium expansion work, pushing the turbine leaf wheels to rotate with the impeller of the gas machine; the ability to work high -temperature gas after heating has improved significantly. Therefore, while the gas turbine drives the gas pressure machine, there is still removal of the output mechanism of the gas turbine.When the gas turbine starts from static, the starting motivation needs to be rotated with a motivation. After the acceleration is to be able to run independently, the starting motivation will be removed.
The working process of the gas turbine is the simplest, called a simple cycle; in addition, there is a heating cycle and a complex cycle.The working quality of the gas turbine comes from the atmosphere, and finally it is discharged to the atmosphere, which is an open cycle. In addition, there is a closed cycle used by the closed cycling of the working quality.The combination of gas turbines and other thermal machines are called composite circulation devices.
The compression ratio of a mild gas pressing at the beginning of gas is the two main factors affecting the efficiency of gas turbines.Increasing the initial temperature of gas and improving the compression ratio accordingly, the efficiency of the gas turbine significantly improves.At the end of the 1970s, the compression ratio reached 31; the initial temperature of the gas turbine for industrial and ships was about 1200 ° C, and the aviation gas turbine exceeded 1350 ° C.
Gas heating
1. The principle of heating
When the gas is burned, the stainless steel mesh cover is heated. The stainless steel mesh cover quickly becomes red. The air is heated through the stainless steel mesh cover.At the same time, the stainless steel mesh cover can produce far -infrared radiation heating peripheral objects (at this time the infrared rays are harmless to the human body).
2. Protective device
Umbrella -shaped heater is usually: dumping protection, flameout protection, and hypoxia protection.
Flashout protection: After the heater is turned off for any reason, the thermal sensing needle (that is, the thermal power puppet) will stop generating the current (the current in the protection device has a thermal inductance to generate no external power supply).The trachea is used to automatically disconnect the heater.Once again, you need to reset the heater control switch and re -operate.
Delivery protection: If the heater is working normally, if it encounters a collision, it will produce vibration or dumping. The built -in dumping protection switch will immediately respond. Cut off the solenoid valve supply circuit. The solenoid valve is extended and closed to the air supply pipeline to automatically break the heater.Once again, you need to reset the heater control switch and re -operate.
Hypoxia protection: Before the oxygen in the air falls to the normal breathing of the human body, the flame is detached from the thermal sensing needle.Make the heater automatically disconnected.Once again, you need to reset the heater control switch and re -operate.
All three types of protection are ultimately achieved by the solenoid valve. If any kind of protection fails, the heater will not be able to turn on the work normally. Therefore, there is no heater to be used.If the heater is automatically extinguished after litting the loose hand, this failure is generally caused by the failure of the protective device. The solution is generally replacing the thermal sensing needle or solenoid valve.
The cabinet heater is usually: dumping protection, flameout protection, and hypoxia protection. The principle is the same as umbrella -shaped heater.
Gas explosion prevention measures
1. Formulate a practical development plan and implement it.All localities should formulate practical overall development plans and special development plans for gas according to their own actualities. In the new construction, reconstruction, and expansion projects, the design, construction, and acceptance of gas supporting projects must be carried out at the same time to avoid repeated construction and repeated construction process.destroy.
2. Gas enterprises should establish and improve rules and regulations and implement them.Each gas enterprise must attach great importance to the formulation of various rules and regulations, including job operation procedures, job responsibility system, emergency rescue plan, fire organization, internal inspection inspection records, equipment operation records, equipment test records, various accountsArchives, etc.Through training, learning, desktop drills, practical exercises and other forms, it is implemented to eliminate hidden dangers of accidents from the root causes and enhance disaster prevention and relief capabilities.
3. Strictly select materials to ensure the quality of the project.Before the construction, various equipment, facilities, materials, and accessories must be carefully purchased and tested, especially high -pressure pipeline materials.The qualifications of design, construction, and supervision units must be prepared, and the construction should be constructed during the construction. During the acceptance process, we must resolutely return to work and rectify where the requirements do not meet the requirements to ensure that the quality of the project meets the standards and ensure the safety of the peoples lives and property.
4. Vigorously promote the common sense of safe use of gas.The publicity of the common sense of gas safety is a long -term, unable to ask.Industry management departments at all levels and gas enterprises should make full use of news media such as radio, television, newspapers, etc., and adopt various methods such as literary and artistic propaganda, extracurricular counseling, science education, knowledge competition, and safety manuals to promote the common sense of gas safety use.Propaganda should consider users of different levels, different groups, and potential users of different ages.
5. Update the concept, timely grasp, accept and introduce new technologies and products.At all times, pay attention to the latest developments of the gas industry, pay attention to the latest gas safety related technologies and products, and promote and apply new technologies and new products that are in line with their own development and effective results.Taking technology as a weapon, improve the reliability of the gas supply system, and create a safer gas operating environment.Such as promoting gas stoves with flameout protection, and promoting combustible gas alarm.
6. Strengthen the supervision responsibilities of the gas industry management department and implement the responsibility system.The gas industry management departments in various places must formulate the gas safety management system, start from the grassroots level, implement the gas safety responsibility system layer by layer, cultivate and establish a sense of safety and safety, so as to form a good safety -oriented atmosphere, and effectively do a good job of safety in the gas industry.Management.

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