Thermal power plant direct air cooling unit dead steam waste heat recovery heat supply system

Abstract

The invention relates to the technical field of power plant energy conservation, in particular to a thermal power plant direct air cooling unit dead steam waste heat recovery heat supply system. The thermal power plant direct air cooling unit dead steam waste heat recovery heat supply system comprises a first steam turbine, a second steam turbine, an air cooling steam condensing system, a dead steam leading-out system, a steam increasing machine system and a two-way heat supply network water cascade heating system, wherein the air cooling steam condensing system, the dead steam leading-out system, the steam increasing machine system and the two-way heat supply network water cascade heating system are arranged corresponding to each steam turbine, the steam exhaust leading-out systems lead out steam exhaust in the steam turbines and are connected to the two-way heat supply network water cascade heating system through a pipeline, two-way heat supply network water involves A-way heat supply network return water and B-way heat supply network return water, the A-way heat supply network return water and the B-way heat supply network return water are arranged in parallel and are connected to the two-way heat supply network water cascade heating systems at the same time, and the two-way heat supply network water cascade heating systems are used for heating of the A-way heat supply network return water and the B-way heat supply network return water. The thermal power plant direct air cooling unit dead steam waste heat recovery heat supply system has the effect of solving the problem of appearing heat supply gaps after one steam turbine breaks down.

Description

technical field

[0001] The application relates to the technical field of power plant energy saving, in particular to a thermal power plant direct air-cooling unit exhaust steam waste heat recovery heat supply system. Background technique

[0002] As we all know, the cold end loss of the Rankine cycle in a thermal power plant accounts for more than 50% of the energy loss of the entire power plant. The large amount of heat (latent heat of steam vaporization) carried by the exhausted steam discharged from the steam turbine is wasted in vain. Moreover, the direct air cooling unit consumes energy (electricity) to cool the exhausted steam.

[0003] If the waste steam of the steam turbine in the thermal power plant can be recycled, not only can a large amount of heat (latent heat of steam vaporization) be recovered, but also the power consumption for cooling the waste steam can be saved. It is a very effective means of energy saving to recycle the heat energy of the exhaust steam ...

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