Retrofit method of supercharging and reducing steam extraction parameters of steam compressor in steam supply branch network

Abstract

The invention provides a transforming and operating method for reducing the extraction steam parameter of a steam turbine coordinated by steam compressor industry steam supply branched network pipeline pressurization. The system configuration comprises an industrial steam header, branched control valves for each heat user, a steam compressor, a gearbox high-speed shaft, a gearbox low-speed shaft, a drive frequency conversion motor, a control module, a power plant DCS and valves and pipe fittings connecting the above devices. By addition of steam compressor on an industry steam supply pipe network high-pressure branched network pipeline, the control module is coordinated with the steam turbine to adjust the load, the industrial steam supply overall extraction steam parameter is reduced, and the purposes of energy saving and turbine load adjustment are achieved. According to the transforming and operating method for reducing the extraction steam parameter of the steam turbine coordinated by steam compressor industry steam supply branched network pipeline pressurization, a new technical route is provided for multi-parameter and multi-user industrial steam supply, combined heat and power generation thermal generator set conducting deep pitching peak is also provided for a novel technological idea, and meanwhile, the transforming and operating method can also be applied to long-distance steam supply pressurization. The transforming and operating method has the characteristics of being simple in transformation and large in energy saving volume.

Description

technical field [0001] The present invention relates to a thermal power generating set system, in particular to industrial steam supply energy saving and industrial steam supply pipeline pressurization of a thermal power generating set, and more specifically to a steam compressor industrial steam supply branch network pipeline supercharging cooperatively reducing steam extraction by a steam turbine parameters of energy-saving technologies. Background technique [0002] According to the composition of my country's power generation installations, the current situation that thermal power generation accounts for more than half of the country's installed capacity will not change in the near future. Steam transformation is one of the methods often adopted in the transformation of cogeneration of heat and power. In recent years, due to excess power, the load rate of thermal power generation units has become lower and lower. This has also caused many industrial steam supply cogenerat...

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Problems solved by technology

[0007] 1. The industrial steam supply and extraction parameters of thermal power cogeneration units are relatively high, and the energy loss is relatively large

[0008] 2. With the low peak load rate of the combined heat and power unit, the extraction parameters of the normal steam source in the original design cannot meet the needs of heat users, and it is necessary to invest in a backup steam source with higher parameters. With the normalization of peak regulation of the combined heat and power unit, This method is less economical to operate. If there is no backup steam source, the combined heat and power unit will not be able to adjust the peak normally.

[0009] 3. The current high-parameter industrial steam supply is limited by the large pressure loss of the pipe network, and it is difficult to achieve long-distance transportation

[0010] 4. When supplying steam for different pressure parameters and multiple industrial steam supply users, the steam supply parameters of the highest pressure user are generally selected, resulting in high overall energy consumption of industrial steam supply

[0011] 5. In the current industrial steam supply mode, there is basically no adjustment method after the steam leaves the industrial steam supply header

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