Supercritical low-temperature working medium cylinder shaft seal gas turbine equipment and using method thereof

Abstract

The invention provides supercritical low-temperature working medium cylinder shaft seal gas turbine equipment and a using method thereof, and belongs to gas turbines for low-temperature working media.The temperature of gas input by a main steam pipeline of a gas turbine must be obviously higher than the critical temperature of a low-temperature power generation working medium; the exhaust steam temperature output by an exhaust pipeline of the gas turbine reaches the critical temperature of the low-temperature power generation working medium; the gas pressure input by the main steam pipeline of the gas turbine must be obviously higher than the critical pressure of the low-temperature power generation working medium; and the exhaust steam pressure output by the exhaust pipeline of the gas turbine reaches the critical pressure of the low-temperature power generation working medium. The invention further provides a shaft sealing technology for shaft end sealing through the highly-airtightstructure of a gas turbine cylinder body, so that the problem of leakage of the two ends of a rotating shaft of a rotating machine such as a gas turbine or an expansion machine is solved, and particularly low-temperature working media high in cost are solved. The gas turbine has the advantages of being low in working medium temperature, compact in structure, small in size, high in efficiency, lowin cost, large in torque force and the like.

Description

technical field [0001] The invention provides a supercritical low-temperature working medium cylinder shaft seal gas turbine equipment and a use method thereof, which belong to the technical field related to gas turbine machinery. The gas turbines include but are not limited to gas turbines, gas motors, gas turbine expanders, gas screw expanders and similar gas turbine mechanical equipment; except for gas turbines, other gas turbine mechanical equipment are generally small Gas turbine, and the cost is relatively high, and it is relatively rare in practical applications; the gas turbine can be large-scale or small-scale equipment, and its application is relatively popular; Other gas turbine equipment is the same. Background technique [0002] In 1882, the Swedish engineer Laval designed and manufactured the first single-stage impulsive steam turbine. The steam turbine is a rotating machine powered by steam and converts the thermal energy of steam into mechanical work. It is ...

AI Technical Summary

Problems solved by technology

[0009] It should be noted that traditional steam turbines and expanders use ordinary temperature or high-temperature-resistant steel. After the low-temperature working medium supercritical gas turbine or expander does work, the output exhaust steam temperature has dropped below zero (such as high-pressure nitrogen, gas turbine After doing work, the temperature of the exhausted steam output is likely to be lower than minus -100 degrees Celsius), some of the steel materials of ordinary steam turbines are not resistant to low temperatures, and it is very likely that they will become brittle and crack, which is obviously not allowed Yes, the solution is to use low temperature resistant materials, including but not limited to austenitic low temperature steel, ferritic low temperature steel, select low temperature resistant materials and adjust according to the characteristics of materials at low temperature

Images