Steam turbine drainage control method and steam turbine drainage system

Abstract

The invention relates to the technical field of steam turbines, in particular to a steam turbine drainage control method and a steam turbine drainage system. The steam turbine drainage control methodcomprises the following steps that firstly, the pressure P and the temperature T in a steam cylinder of a steam turbine are obtained in real time; secondly, the state of a medium in the steam cylinderis obtained through the pressure P and the temperature T in the steam cylinder; then, if the medium in the steam cylinder is partially in the liquid state, a drain valve communicating with the steamcylinder is opened; and finally, if the medium in the steam cylinder is in the gas state, the drain valve communicating with the steam cylinder is closed. Therefore, by means of the steam turbine drainage control method, the state of the medium in the steam cylinder of the steam turbine can be rapidly and accurately obtained, the drain valve is controlled to be opened or closed in time according to an obtained result, and then the situation that the drain valve is not opened or closed in time and consequently safe operation of the steam turbine is affected is avoided.

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to a steam turbine drainage control method and a steam turbine drainage system. Background technique [0002] During the operation of the steam turbine, it is necessary to monitor the state of the medium in the cylinder of the steam turbine in real time to prevent the accumulation of water in the cylinder. If the accumulation of water is not discharged in time, it will cause water hammer and damage the blades and equipment, and even cause personal accidents in severe cases; therefore, accurate The state of the medium in the cylinder can be accurately judged, and the steam trap on the cylinder can be opened or closed in time; the steam trap is generally a manual, electric control or pneumatic type steam trap control valve, but no matter what type of steam trap is, it needs to be manually adjusted Judging the state of the medium in the cylinder, and then opening or closing the ...

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Problems solved by technology

[0002] During the operation of the steam turbine, it is necessary to monitor the state of the medium in the cylinder of the steam turbine in real time to prevent the accumulation of water in the cylinder. If the accumulation of water is not discharged in time, it will cause water hammer and damage the blades and equipment, and even cause personal accidents in severe cases; therefore, accurate The state of the medium in the cylinder can be accurately judged, and the steam trap on the cylinder can be opened or closed in time; the steam trap is generally a manual, electric control or pneumatic type steam trap control valve, but no matter what type of steam trap is, it needs to be manually adjusted Judging the state of the medium in the cylinder, and then opening or closing the valve; when there is a sudden change in working conditions during the operation of the steam turbine, or human judgment is wrong, it will cause the valve to open and close untimely, resulting in adverse consequences and affecting the steam turbine. safe operation

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