Daily, one day 20181219
Thread Content
Why is a water spray cooling device installed in the exhaust cylinder? During the startup of the turbine, as well as when it is operating at no load or low load, the steam flow rate is very low; this amount of steam is not sufficient to carry away the heat generated by friction between the steam and the impeller. As a result, the exhaust temperature rises, along with the temperature of the exhaust cylinder. Excessively high exhaust temperatures can cause significant deformation of the exhaust cylinder, disrupting the alignment of the rotating and stationary parts of the turbine. In severe cases, this can lead to vibration in the unit or other accidents. Therefore, high-power turbines are equipped with water injection systems in their exhaust cylinders to reduce temperatures.
Because during the startup of the turbine, as well as at no-load and low-load conditions, the steam flow rate is very low; it is not sufficient to dissipate the heat generated by friction in the impeller. This leads to an increase in the exhaust steam temperature and the temperature of the exhaust cylinder, causing significant deformation of the cylinder. This disrupts the alignment of the centerlines of the rotating and stationary parts of the turbine, and in severe cases, it can result in vibration in the unit or other accidents. Therefore, high-power units are all equipped with steam exhaust cylinder water spray cooling systems.
During turbine startup, at no-load conditions, and under light load, the steam flow rate is very low, insufficient to carry away the heat generated by friction between the steam and the impeller. As a result, the exhaust steam temperature rises, and so does the temperature of the exhaust cylinder. Excessively high exhaust temperature can cause significant deformation of the exhaust cylinder, disrupting the alignment of the centerlines of the rotating and stationary parts of the turbine; in severe cases, this can lead to vibration in the unit or other accidents. Therefore, high-power units are all equipped with steam exhaust cylinder water spray cooling systems.
Because during the startup of the turbine, as well as at no-load and low-load conditions, the steam flow rate is very low; it is not sufficient to dissipate the heat generated by friction in the impeller. This leads to an increase in the exhaust steam temperature and the temperature of the exhaust cylinder, causing significant deformation of the cylinder. This disrupts the alignment of the centerlines of the rotating and stationary parts of the turbine, and in severe cases, it can result in vibration in the unit or other accidents. Therefore, high-power units are all equipped with steam exhaust cylinder water spray cooling systems.
During the startup of the turbine, as well as at no-load and low-load conditions, the steam flow rate is very low; it is not sufficient to dissipate the heat generated by friction in the impeller. This leads to an increase in the exhaust steam temperature and the temperature of the exhaust cylinder, causing significant deformation of the cylinder. Such deformation disrupts the alignment of the centerlines of the rotating and stationary parts of the turbine, and in severe cases, it can cause vibration in the unit or other accidents. Therefore, high-power units are all equipped with steam exhaust cylinder water spray cooling systems.
It is to prevent cylinder overheating from causing a cylinder explosion.
During turbine startup, at no-load conditions, and under light load, the steam flow rate is very low; it is not sufficient to remove the heat generated by friction between the steam and the impeller. As a result, the exhaust steam temperature rises, and so does the temperature of the exhaust cylinder. Excessively high exhaust temperature can cause significant deformation of the exhaust cylinder, disrupting the alignment of the centerlines of the rotating and stationary parts of the turbine; in severe cases, this can lead to vibration in the unit or other accidents. Therefore, high-power units are all equipped with steam exhaust cylinder water spray cooling systems. Small units do not have water spray cooling systems, so long periods of operation at no load should be avoided as this can cause the exhaust cylinder temperature to exceed safe limits
During turbine startup, at no-load conditions, and under light load, the steam flow rate is very low; it is not sufficient to remove the heat generated by friction between the steam and the impeller. As a result, the exhaust steam temperature rises, and so does the temperature of the exhaust cylinder. Excessively high exhaust temperature can cause significant deformation of the exhaust cylinder, disrupting the alignment of the centerlines of the rotating and stationary parts of the turbine; in severe cases, this can lead to vibration in the unit or other accidents. Therefore, high-power units are all equipped with steam exhaust cylinder water spray cooling systems.
Because during the startup of the turbine, as well as at no-load and low-load conditions, the steam flow rate is very low; it is not sufficient to dissipate the heat generated by friction in the impeller. This leads to an increase in the exhaust steam temperature and the temperature of the exhaust cylinder, causing significant deformation of the cylinder. This disrupts the alignment of the centerlines of the rotating and stationary parts of the turbine, and in severe cases, it can result in vibration in the unit or other accidents. Therefore, high-power units are all equipped with steam exhaust cylinder water spray cooling systems.