Cogeneration condensing steam turbine

Abstract

The invention provides a cogeneration condensing steam turbine, which comprises two parts, e.g., a high / intermediate-pressure module and an intermediate / low-pressure module. The high / intermediate-pressure module comprises a high / intermediate-pressure cylinder. The intermediate / low-pressure module comprises an intermediate / low-pressure cylinder. A cylinder separation point of the high / intermediate-pressure cylinder and the intermediate / low-pressure cylinder is arranged in intermediate-pressure circulation, and cylinder separation pressure is 1 to 3MPa. The intermediate-pressure end of the high / intermediate-pressure cylinder is communicated with the intermediate-pressure end of the intermediate / low-pressure cylinder through a communicating pipe. A steam extraction pipe is arranged at a steam exhaust port of the high / intermediate-pressure cylinder or on the communicating pipe. According to the steam turbine, the cylinder separation point is arranged in the intermediate-pressure circulation, the steam turbine is divided into the two parts, e.g., the high / intermediate-pressure module and the intermediate / low-pressure cylinder, and compared with the conventional steam turbine adopting a steam extraction regulation mode of arranging a rotary partition plate or a built-in steam extraction regulation valve in a runner of the steam turbine, the steam turbine has the advantages that difficulty in the design of the steam turbine is effectively lowered, and the internal efficiency of a cogeneration turboset is improved; and in addition, the cylinder separation pressure of the high / intermediate-pressure cylinder and the intermediate / low-pressure cylinder is increased, so that the steam extraction pressure of the steam extraction pipe can be increased, and the adaptability of such a steam extraction mode to steam extraction parameters can further be improved effectively.

Description

technical field [0001] The invention relates to the field of steam turbine manufacturing, in particular to a condensing steam turbine for cogeneration of heat and power. Background technique [0002] The steam turbine is one of the key power equipment in the construction of a power station, and it is an energy conversion device that converts thermal energy into mechanical energy and then into electrical energy. The high-temperature and high-pressure steam produced by the boiler, through the steam turbine, converts the thermal energy and pressure potential energy into the mechanical energy of the steam turbine, which drives the rotor of the steam turbine to output shaft work, and the mechanical energy is transmitted to the generator through the shaft of the steam turbine, thereby converting the mechanical energy into electrical energy. , the steam turbine is often called as the source of power: "the source of light". [0003] Combined heat and power condensing steam turbine ...

AI Technical Summary

Problems solved by technology

Although this steam extraction method can simplify the structure of the steam turbine body, due to the modular design of the steam turbine, the sub-cylinder pressure of the same type of steam turbine rarely changes greatly, the steam extraction pressure is small, and its steam extraction parameters lack certain flexibility.

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