Dead steam waste heat recovery heat supply system for water cooling turboset

Abstract

The invention relates to a dead steam waste heat recovery heat supply system for a water cooling turboset. The system comprises a turbine, a corresponding water-cooled condenser, a dead steam extraction system and a dead steam recycling heat supply system of a double step-up ratio steam increaser. The dead steam extraction system is connected to the water-cooled condenser and dead steam is transported and extracted to the dead steam recycling heat supply system of the double step-up steam increaser through a pipeline; the dead steam recycling heat supply system of the double step-up steam increaser is provided with a first steam increaser, a condenser of the first steam increaser, a second steam increaser and a condenser of the second steam increaser; the first and second steam increasersare different in step-up ratio; a heat net circulating water pipeline is connected to the condenser of the first steam increaser and the condenser of the second steam increaser for heating. Dead steamwaste heat of a water-cooled turbine of a heat-engine plant is recycled efficiently, the utilization amount of dead steam is improved, the heat supply capacity is improved, the cold end loss is reduced to the maximum extent, and the energy-saving benefit is maximized.

Description

technical field [0001] The invention belongs to the field of energy saving of power plants, and in particular relates to a exhaust steam waste heat recovery heating system suitable for water-cooled steam turbine units. Background technique [0002] As we all know, the actual thermal efficiency of large-scale thermal power plants is usually only about 40%, and the heat lost through the exhaust steam at the cold end accounts for about 50%. Therefore, it is the most potential in the field of power plant energy saving and emission reduction to recycle the exhaust heat of the steam turbine and reduce the loss at the cold end. [0003] For air-cooled units, due to the high operating back pressure of the steam turbine, it is relatively easy to construct a steam turbine waste heat recovery heating system based on a steam booster unit during heating in winter. There have been many successful applications in air-cooled units by using steam generators (also known as jet heat pumps) to...

AI Technical Summary

Problems solved by technology

However, due to the low operating back pressure of the water-cooled steam turbine unit and the high return water temperature of the heating network, the utilization of exhaust steam is limited and the energy-saving benefits are limited

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