9mw mixed temperature inlet steam control exhaust steam temperature backpressure steam turbine and its temperature adjustment method

Abstract

The invention provides a temperature regulation method of a 9MW temperature-mixing steam admission control turbine. The temperature regulation method is applied to a turbo generator set to drag a generator, external heat supply with the pressure of 1.3 MPa, the temperature of 320 DEG C and an exhaust stream index of 120 t / h is met, and it is ensured that the turbine safely and reliably operates; an operating point of 75% THA (THA is heat rate inspection and acceptance working condition) is used as a design point, and the turbine at least operates at the working condition of 50% THA and above.The temperature regulation method of the 9MW temperature-mixing steam admission control turbine has the following advantages that 1, through reasonable allocation, it is ensured that extra economicalbenefits are generated by dragging the generator, the heat supply requirement of 1.3 MPa, 320 DEG C and 120 t / h of an industrial heat supply market is met, and large-scale popularization and usage aresuitable; and 2, a regulating valve adopts the exhaust steam temperature as the feedback condition to control the opening of the regulating valve for the first time, so that the steam admission parameter is controlled. Compared with the disadvantage of taking pressure as the feedback condition generally, the temperature control has feed retardance, but the heat supply requirement of 1.3 MPa, 320DEG C and 120t / h can be accurately met.

Description

technical field [0001] The invention relates to an industrial steam turbine for a steam turbine generator set, in particular to a back pressure steam turbine suitable for a 9MW mixed-temperature inlet steam to control the exhaust steam temperature and a temperature adjustment method. Background technique [0002] According to market research, there is a heating demand of 1.3MPa, 320°C, and 120t / h in the industrial heating market, and the four pumps of the main engine cannot meet this parameter. If the reheated cold-end steam or other steam sources are used for temperature and pressure reduction, the economy is poor. At the same time, since the steam volume of the cold-end steam simply reheated cannot meet the flow demand of 120t / h, it needs to be supplemented by additional steam from the outlet of the reheater. At present, there is no relevant equipment in the market that can meet the above-mentioned industrial heating needs and have good economic benefits, resulting in ene...

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Problems solved by technology

[0002] According to market research, the industrial heating market has a heating demand of 1.3MPa, 320°C, and 120t / h, and the four pumps of the main engine cannot meet this parameter

If the reheated cold end steam or other steam sources are used for temperature reduction and decompression, the economy is poor

At the same time, because the steam volume of the cold end steam simply reheated cannot meet the flow demand of 120t / h, it needs to be supplemented by additional steam from the outlet of the reheater

At present, there is no relevant equipment in the market that can meet the above-mentioned industrial heating needs and have good economic benefits, resulting in energy waste and low equipment operation efficiency. Therefore, a new type of high-efficiency and energy-saving steam turbine is needed to meet the above needs

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