In the production of the electric power industry, equipment such as boilers, steam turbines, pressure vessels, pipelines, etc. are under high temperature and high pressure conditions for a long time. Once the internal pressure rises abnormally due to operating errors, equipment failures, or media fluctuations, and the pressure limit of the equipment is exceeded, the equipment will be shut down for maintenance, and the heavy equipment will cause major safety accidents such as explosions and media leaks, which directly threaten the safety of personnel and the stable operation of the power grid. Overpressure has become one of the main problems in the safe production of the power industry, and rupture disc, as a safety discharge device that can quickly respond to the overpressure state, has become an important equipment to solve this problem through the characteristics of precise pressure relief and reliable protection.
Judging from the overpressure risk scenarios of major equipment in the power industry, the application of rupture disc is very targeted. In the field of thermal power generation, the boiler is the main device for energy conversion. The steam pressure can reach 10 to 30Mpa during normal operation. If the economizer and superheater pipes are clogged and the steam circulation is not smooth, or the combustion system is abnormal and the pressure in the furnace rises sharply, the risk of overpressure will increase instantly. At this time, the rupture disc installed on the boiler steam outlet pipe or steam drum can quickly rupture when the pressure reaches a preset blasting value, forming an efficient discharge channel, and discharging excess steam in a short period of time to prevent the boiler's pressure-bearing parts from plastic deformation or explosion due to overpressure.
In the field of nuclear power, nuclear reactor cooling systems, steam generators and other equipment not only withstand high pressure, but also involve radioactive media. The safety and sealing requirements for overpressure protection are more stringent. Traditional safety valves cannot be fully adapted to high-pressure nuclear power scenarios because of their slow response speed and the risk of wear and leakage of the sealing surface. Rupture disc has become an important supplementary protective device because of its zero-leakage sealing characteristics and millisecond response speed. For example, on the high-pressure pipeline of the containment sprinkler system of a nuclear reactor, the rupture disc is used in series with the safety valve. Under normal operating conditions, the rupture disc is absolutely sealed to prevent leakage of radioactive coolant. When the pipeline overpressure and the safety valve fails to open in time, the rupture disc can quickly rupture and relieve pressure, which double guarantees the pressure stability of the cooling system and avoids nuclear safety risks caused by excessive containment pressure.
At the same time, rupture disc can also adapt to the complex operating conditions of high-voltage equipment in the power industry. Some power equipment has frequent pressure fluctuations, such as steam turbine pumping pipelines. Traditional safety devices are easy to fail due to fatigue, while rupture disc can withstand tens of thousands of pressure fluctuations without damage. For impurity-containing media common in power equipment, rupture discs with slotted or blade-cutting structures can avoid impurities clogging the discharge channel, and the discharge efficiency is not affected when overpressure occurs.
In short, rupture disc provides customized protection solutions for the overpressure risks and operating conditions of different high-voltage equipment in the power industry, which can solve the overpressure problems of the power industry in all directions.
