Heating plant for supplying heat for heat-engine plant by recovering exhaust steam and vaporizing latent heat

Abstract

The invention relates to a heating plant for supplying heat for a heat-engine plant by recovering exhaust steam and vaporizing latent heat for solving the question of dead steam heat supply for an air cooling machine unit of the heat-engine plant. The invention has the following technical proposal: a condenser branch is led out from the middle part of a dead steam pipeline, a plurality of heat supply units are arranged on a cooling circulating water loop of the condenser, each heat supply unit comprises a heat exchanger, a heat exchanger circulating water pump, a heat pump machine unit and a heat supply user terminal; the condenser cooling circulating water passes through the exchanger, the cooling circulating water pump and the condenser to form a cooling water closed loop; the heat exchanger circulating water passes through a heat pump machine unit heat absorption side, the heat exchanger circulating water pump and the heat exchanger to form a heat exchange water closed loop; heat user circulating water passes through a heat pump machine unit heat release side, the heat supply user terminal and the heat supply circulating pump to form a hot water supply closed loop. In the invention, exhaust steam of a steam turbine is recover and latent heat is vaporized to supply heat in combination with the heat pump, so that work-doing steam is not consumed, heat supply temperature can be adjusted according to needs at the user terminal; in addition, the heating plant features flexible application, obvious energy conservation effect and improved machine unit efficiency.

Description

technical field [0001] The invention relates to an energy-saving heat supply technology, in particular to an energy-saving heat supply device for an air-cooling unit of a thermal power plant that recovers latent heat of vaporization of exhaust steam combined with a heat pump unit, and belongs to the technical field of heating and heat supply. Background technique [0002] Thermal power generation requires a cold end device that acts as a cold source to ensure that the working medium releases heat at a constant pressure in the condensing equipment. The cold end device is generally composed of a condensing device that releases heat at a constant pressure in a vacuum state and a cooling system that can remove the latent heat of condensation of the exhaust gas in time. According to the different cooling media of the cooling system, the current cooling methods of condensing equipment mainly include wet cooling and air cooling. Humid cooling and heating are more economical, but t...

AI Technical Summary

Problems solved by technology

But there is a problem: under the normal working conditions of thermal power plants in winter, the exhaust gas temperature of exhaust steam is about 45°C. It is obviously not enough to directly heat the exhaust steam for heating and hot water supply. The temperature will definitely change the operating conditions of the cooling unit and affect the normal power generation of the thermal power plant.

Images