Evaporation type condenser system used for thermal power plant small steam turbine steam exhaust condensing

Abstract

The invention discloses an evaporation type condenser system used for thermal power plant small steam turbine steam exhaust condensing. The system comprises a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a drive steam turbine and a condenser of a direct air-cooled unit. A steam exhaust opening of a small steam turbine is connected with an evaporation type condenser through a pipeline, and the evaporation type condenser is used for condensing exhausted steam of the small turbine. A condensed water outlet of the evaporation type condenser is connected with a condensed water main pipe, and condensed water flows back to a main machine backheating system through a booster pump. The evaporation type condenser system is simple, small in occupied area and particularly suitable for exhausted steam condensing of a water feed pump or a draught fan of a unit in use, and a motor drive mode is changed into a small steam turbine drive mode. Early investment is small, environment adaptability is high, the heat transfer coefficient is large, and the heat exchange effect is good. When temperature is low in winter, the system can be used as a direct air-cooled condenser, and the water consumption is zero.

Description

technical field [0001] The invention belongs to the field of power station energy saving and consumption reduction, and relates to an evaporative condensation technology, in particular to an evaporative condenser system used for condensing exhaust steam of a small steam turbine in a thermal power plant. Background technique [0002] For many reasons, most of the direct air-cooled unit feed pumps in China are driven by electric motors, and a considerable number of wet-cooled unit feed pumps are also driven by electric motors. According to statistics, the power consumption rate of the air-cooled unit under full load is between 8.5 and 9.5%, among which the electric feed water pump is the largest power-consuming equipment, accounting for more than 35% of the total power consumption of the plant, followed by the induced draft fan; and Under the full load condition of the wet-cooling unit, the plant power consumption rate is between 7 and 8%. Among them, the electric feed water p...

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Problems solved by technology

[0009] The purpose of the present invention is to solve the defects of the existing generator set, such as large floor area, high operating cost, complex operation and maintenance workload, etc., and to provide an evaporative condenser system for exhaust steam condensation of small steam turbines in thermal power plants. It can be used in the exhaust steam cold end system of the steam turbine driven by the direct air cooling unit, and can also be used in the exhaust steam cold end system of the steam turbine driven by the wet cooling unit

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