Method for enhancing vacuum of steam condenser

Abstract

The invention discloses a method for enhancing vacuum of a steam condenser. A cooler is arranged on a pipeline between the steam condenser and a vacuum pump, a condensate water recovery and storage tank is installed at the gas side of the cooler, and the water storage tank is connected with a hot well of the steam condenser through a water seal. Only when temperature of the outlet of the cooler is kept at about 15 DEG C, the steam condenser vacuum can approach ultimate vacuum of the vacuum pump. In summer, if the installed cooler is put into operation, the steam condenser vacuum is enhanced to the ultimate vacuum of the vacuum pump with increase of about 2 kpa, therefore, by calculating according to that the steam condenser vacuum is enhanced by 1kpa, the coal consumption is lowered by 1.97g / kwh, and a machine set of 600 MW annually generates power for 300 days on average, the invention can save coals for 17020.8 t every year; and if the price of the coal is 500 yuan / t, the invention can save the generation cost for 8510400 yuan every year, thereby having remarkable economic benefit.

Description

technical field [0001] The invention relates to a vacuum pumping system for a condenser of a condensing steam turbine generator set in a power plant. Specifically, it is a method of increasing the vacuum of the condenser. Background technique [0002] The quality of the vacuum in the condenser of the condensing steam turbine generator set directly affects the economical operation of the steam turbine in the power plant. There are many factors that affect the vacuum of the condenser, among which the temperature of the water used in the jet pool of the water jet vacuum pump and the temperature of the working water used in the water ring vacuum pump are one of the factors that affect the vacuum of the condenser. The technicians in the power plant (jet vacuum pump) use the water in the jet pool to maintain the water temperature in the jet pool, so as to ensure that the vacuum of the condenser remains constant; the water ring vacuum pump uses (cooler) to cool the working water i...

AI Technical Summary

Problems solved by technology

The technicians in the power plant (jet vacuum pump) use the water in the jet pool to maintain the water temperature in the jet pool, so as to ensure that the vacuum of the condenser remains constant; the water ring vacuum pump uses (cooler) to cool the working water in the vacuum pump to ensure The suction capacity of the water ring vacuum pump can maintain the vacuum of the condenser unchanged, but these methods cannot change the influence of summer climate and cooling water temperature on the suction capacity of the vacuum pump.

Some power plants attempt to use central air-conditioning water to cool the working water in the water ring vacuum pump to increase the vacuum of the condenser, but they are not ideal.

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