Abstract
At present, the condenser pressure of the current generation unit is generally not up to the design value during operation, which affects the thermal cycle economy of the power plant. For a subcritical 600 MW unit, for every 1 kPa reduction in condenser pressure, about 2.5g/(kW·h) reduction in power supply coal consumption. There are many problems in the operation of the original condenser of a 600 MW unit, which leads to the reduction of thermal efficiency of the unit. After the improvement of condenser tube bundle arrangement, the improvement of water chamber structure and the improvement of vacuum system, the operation effect became better obviously The performance test results of condenser after comprehensive energy-saving improvement show that the condenser pressure was reduced by 1.46 kPa under the same boundary condition compared with that before the improvement. According to the vacuum parameter correction curve of the steam turbine of the subcritical 600MW unit, the vacuum is increased by 1.46 kPa, which can reduce the heat consumption rate of the steam turbine by 94.9 kJ/(kW·h) and reduce the power supply coal consumption by 3.65 g/(kW·h).
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