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高温高压直角截止阀由于开闭过程中密封面之间摩擦力小,比较耐用,开启高度不大,制造容易,维修方便,不仅适用于中低压,而且适用于高压,已成为工业上使用最广泛的一种阀门。本文主要利用商用有限元软件ANSYS,模拟研究了工业用高温高压(1800 K～1900 K,2 MPa～6 MPa)直角截止阀的关闭和开启状态时,流体介质、阀体和阀芯的温度场分布。研究发现,尽管1.6 m/s的循环冷却水,可以较好的冷却关闭状态下高温高压截止阀的整体温度,绝大部分温度均接近于室温(包括阀芯内壁),介质入口处最高温度也只有492.3 K。反观开启状态下,阀芯和阀体的温度场和峰值温度均明显升高,最高可达1350 K,阀芯内壁温度也明显高于室温。因此,为保证开启状态下截止阀在高温高压环境中,可靠稳定工作,建议适当提高循环冷却水的流速,并适当增加阀体和阀芯的壁厚。此外,由于截止阀每周期内关闭时间较长(达4～6小时),为降低冷却成本,避免浪费能源,应对循环水冷却系统进行智能控制,当截止阀处于关闭状态时,可实现周期性降低循环水流速,满足不同阶段的冷却需求。
High temperature and pressure of the right angle valve due to the opening and closing process between the sealing surface friction, durable, open height is not easy to manufacture, easy maintenance, not only for low pressure, but also for high pressure, has become the most widely used in industry A kind of valve In this paper, the commercial finite element software ANSYS was used to simulate the temperature field of the fluid medium, the valve body and the valve core in the closed and open state of the industrial high temperature and high pressure (1800 K ~ 1900 K, 2 MPa ~ 6 MPa) distributed. The study found that, although 1.6 m / s circulating cooling water, can better shut off the high temperature and high pressure shut-off valve overall temperature, most of the temperature is close to room temperature (including the inner wall of the valve core), the maximum temperature of the media inlet Only 492.3K. In contrast, open state, the valve core and valve temperature field and peak temperature were significantly increased up to 1350 K, valve core wall temperature was significantly higher than room temperature. Therefore, in order to ensure the open state of the globe valve in a high-temperature and high-pressure environment, reliable and stable operation, it is recommended to appropriately increase the circulating cooling water flow rate, and appropriately increase the valve body and valve core wall thickness. In addition, because shut-off valves last longer (up to 4 to 6 hours) per cycle, the circulating water cooling system should be intelligently controlled in order to reduce cooling costs and avoid energy wasted. Periodicity can be achieved when the shut-off valve is closed Reduce the circulating water flow to meet the cooling needs of different stages.