Condensation heat recovery central heating system of power plant indirect air cooling machine set

Abstract

The invention relates to a condensation heat recovery central heating system of a power plant indirect air cooling machine set. The invention is used for recovering surplus heat of exhaust steam of a power plant steam turbine. The system comprises a steam outlet turbine (1), a turbine steam exhaust header pipe (2), a water-cooled condenser (3), a closed cooling circulation water system (4), an indirect air condensation steam system (5), a heat utilization place (6) and a hot water supply pipeline system (7), wherein the exhaust steam of the steam outlet turbine (1) is connected with the water-cooled condenser (3) through the turbine steam exhaust header pipe (2). The system is characterized in that the heating system also comprises an absorption type heat pump machine set (8-2) and a surplus heat water circulation pipeline system (9); the closed cooled circulation water of the water-cooled condenser (3) is divided into two paths, one path is connected with an evaporator of the absorption type heat pump machine set (8-2) through the surplus heat water circulation pipeline system (9), and the other path is connected with the indirect air condensation steam system (5); and a hot water supply outlet of the absorption type heat pump machine set (8-2) is connected with the heat utilization place (6) through the hot water supply pipeline system (7). The heating system can efficiently recover and utilize the low-grade condensation heat of exhaust steam of an indirect air cooling power plant.

Description

(1) Technical field [0001] The invention relates to a central heating system for recovering condensation heat of an indirect air-cooling unit in a power plant. It is used to recover the exhaust heat of steam turbines in power stations. (2) Background technology [0002] my country's winter heating, urban central heating, production process central heating and other hot water pipe networks adopt the centralized heating mode of combined heat and power in thermal power plants in many cases. For thermal power plants with indirect air-cooled units, even under heating conditions, there is still a large amount of low-grade exhaust steam waste heat generated by steam turbines that cannot be used, so it needs to be discharged into the atmosphere through the intercooling system, which affects the overall efficiency of energy utilization. [0003] Such as figure 1 As shown, in thermal power plants with indirect air-cooled units, the current central heating hot water generally uses me...

AI Technical Summary

Problems solved by technology

For thermal power plants with indirect air-cooled units, even under heating conditions, there is still a large amount of low-grade exhaust steam waste heat generated by steam turbines that cannot be used, so it needs to be discharged into the atmosphere through the intercooling system, which affects the overall efficiency of energy utilization.

[0003] like figure 1 As shown, in thermal power plants with indirect air-cooled units, the current central heating hot water generally uses medium-pressure steam (generally 0.2-1.0 MPa) extracted by the steam turbine of the power plant to directly heat the hot water through the steam-water heat exchanger for central heating. Waste heat from low-grade exhaust steam cannot be utilized

It is discharged into the atmosphere through the indirect air cooling system, which not only affects the overall efficiency of energy utilization, but also generates thermal pollution

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