Safety protection system and method for cutting low-pressure cylinder operation of thermal power unit
A thermal power unit and safety protection technology, which is applied to safety devices, mechanical equipment, steam engine devices, etc., can solve problems such as unit shutdown, unreasonable coordination and cooperation, and unreasonable control, so as to reduce unit output, ensure safe shutdown, and increase supply. The effect of heat capacity
Pending Publication Date: 2018-09-21
辽宁东方发电有限公司 +1
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[0006] During the operation mode of the steam turbine from the extraction condensing unit to the back pressure unit, if the coordination and cooperation of the hydraulic control butterfly valve, the quick-closing regulating valve of the extraction steam and the regulating valve of the cooling steam are not reasonable, or the exhaust pressure of the medium pressure cylinder and the in
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[0056] The present invention will be further explained below in conjunction with the drawings:
[0057] Such as figure 1 As shown, the present invention provides a safety protection system for the operation of a thermal power unit with a low-pressure cylinder cut off, including a thermal power generating set. The boiler outlet of the thermal power generating set is connected with a high-pressure cylinder 32 through a pipeline, and the pipeline connecting the boiler outlet and the high-pressure cylinder 32 is provided with flow metering. The device 22, the main steam valve 6 of the steam turbine and the high pressure regulating valve 7, the exhaust pipe of the high pressure cylinder 32, that is, the inlet pipe of the intermediate pressure cylinder, passes through the boiler and communicates with the intermediate pressure cylinder 33. The inlet pipe of the intermediate pressure cylinder 33 is provided with In the medium pressure regulating valve 8, the medium pressure cylinder 33 co...
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The invention belongs to the technical field of thermal power unit operation and relates to a safety protection system and method for the cutting low-pressure cylinder operation of a thermal power unit. The system comprises equipment of an original unit, and a hydraulic control butterfly valve of a middle-low cylinder steam guide pipe which can be completely closed is reformed; and a cooling steamsystem of a low-pressure cylinder is additionally arranged, a water spray desuperheating system of the low-pressure cylinder is reformed, and various pressure sensors, a flow measuring device and a galvanic couple resistor are additionally arranged. According to the safety protection method, a protection method for interlocking opening and allowing closing of the hydraulic control butterfly valveis designed; a protection method for interlocking closing of an extraction stop valve and an extraction check valve and a protection method for manual closing are designed; a protection method for interlocking opening and allowing closing of an extraction quick closing regulating valve is designed; a protection method for interlocking opening and interlocking closing of a cooling steam regulatingvalve is designed; and a protection method for interlocking opening and interlocking closing of a low-pressure cylinder water spray regulating valve and a protection method for high or low exhaust pressure of a medium-pressure cylinder are designed, so that the operation safety of a steam turbine unit is protected during the cutting cylinder process of the thermal power unit.
Description
Technical field [0001] The invention belongs to the technical field of the operation of a thermal power unit, and specifically relates to a thermal safety protection system and method for the operation of the thermal power unit with a low pressure cylinder removed. Background technique [0002] In recent years, large-scale coal-fired power generating units in neighboring cities in northern my country have been transformed into cogeneration units to provide heat to urban residents during the heating period. The power generation load of the units increases with the increase in heat supply. At the same time, new energy sources such as wind power and photovoltaics The installed capacity of electric power continues to grow rapidly. Wind power and photovoltaics provide a large amount of clean energy, but there are also the randomness and instability of their power output, which poses a huge challenge to the safe operation of the power system and the guarantee of power supply. At present...
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Login to view more IPC IPC(8): F01D21/00F01D15/10F01D17/00F01K13/00
CPCF01D15/10F01D17/00F01D21/00F01K13/00F01K13/003
Inventor 郭涛王力韩立曲大雷崔占杰衣明新张敏
Owner 辽宁东方发电有限公司
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