Water cooled steam turbine unit dead steam waste heat recovery heat supply system

Abstract

Provided is a water cooled steam turbine unit dead steam waste heat recovery heat supply system. The system comprises a steam turbine and a corresponding condenser, by using a dead steam extraction system, a vent hole is formed in the condenser or a steam turbine exhaust pipe for bringing the dead steam out, through a pipeline, the dead steam is transported to a steam generator dead steam recoveryand utilization heat supply system; the steam generator dead steam recovery and utilization heat supply system comprises a steam generator and a steam generator condenser; an absorption or compression type heat pump heat supply system comprises an absorption or compression type heat pump unit, a power steam system of the heat pump unit is connected to a steam turbine medium pressure cylinder to exhaust steam; the steam generator dead steam recovery and utilization heat supply system and the absorption or compression type heat pump heat supply system are connected with each other, and simultaneously connected to a heat supply pipe network. According to the system, the efficient recovery and utilization of dead steam waste heat of the water cooled steam turbine in a thermal power plant is achieved, the utilization amount of dead steam is improved, the heat supply capacity is improved, the loss of a cold end is reduced to the maximum, and the maximum energy saving efficiency is realized.

Description

technical field [0001] The invention belongs to the field of energy saving of power plants, and in particular relates to a heat supply system for recovering exhaust steam waste heat of a water-cooled steam turbine unit based on a steam booster. 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. 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 j...

AI Technical Summary

Problems solved by technology

But the back pressure should not be raised too much

Images