Power station condensate pump depth frequency conversion system

Abstract

The invention relates to a deep frequency conversion system of a condensate pump in a power station, which is mainly used for many other users after the condensate is pressurized in a thermal power plant. Including the sealing water system and the condensed jellyfish pipe, the condensed jellyfish pipe is led to an inlet pipeline, the inlet pipeline is provided with a booster pump, and the outlet of the inlet pipeline is provided with a recirculation circuit, and the pipeline of the recirculation circuit is connected to the On the jellyfish pipe, the outlet pipe is connected to the sealing water system and the user branch. The invention increases the pressure from the outlet main pipe of the condensate pump to the sealing water of the feed pump, so that when the load of the condensate pump is more than 50% of the generator set, its rotational speed can be reduced, and a remarkable energy-saving effect is achieved. At the same time, the water level regulating valve of the deaerator is fully open when the load of the generator set is over 50%, and the water level of the deaerator is only controlled by the speed of the condensate pump, changing from double-variable control of water level to single-variable control, and the adjustment quality of water level control Greatly improved to promote the stable operation of the unit.

Description

technical field [0001] The present invention relates to a frequency conversion system, in particular to a power plant condensate pump deep frequency conversion system, which belongs to pipeline fluid pressurization technology, and is mainly used in thermal power plants including thermal power plants and nuclear power plants after the condensate water pressurization is used for other numerous users. . The most critical users are feed water pump sealing water, cooling on steam pipeline and valve water sealing system. Background technique [0002] The electric power industry is an important basic industry of my country's national economy. Coal-fired thermal power generation enterprises provide electric energy for social development and economic development, and are also industries that consume a large amount of primary energy and water resources. With the development of my country's and global economy, energy and environmental protection in recent years, some new changes have...

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Problems solved by technology

[0010] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a power station condensate pump deep frequency conversion system, which solves the problems of low operating efficiency and large energy consumption of the condensate pump in the prior art, and the present invention improves the regulation of the generating set quality, which promotes the stable operation of the unit

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