Direct air cooling system utilizing ammonia cold energy in ammonia-doped power plant

Abstract

The invention provides a direct air cooling system utilizing ammonia cold energy in an ammonia-doped power plant, and belongs to the field of power plant cooling, the system comprises a steam exhaust condensation chamber, a steam exhaust distribution pipe, a liquid ammonia distribution pipe, a drain pipe, a condensation water tank, a direct cooling tower and an ammonia buffer tank, the steam exhaust condensation chamber is provided with a liquid ammonia inlet and a steam exhaust inlet, and a liquid ammonia channel is further arranged in the steam exhaust condensation chamber; meanwhile, an outlet of the steam exhaust condensation chamber is respectively connected with a steam exhaust distribution pipe, a liquid ammonia distribution pipe and a drain pipe; each cooling unit in the direct cooling tower comprises a steam exhaust pipe bundle and a liquid ammonia pipe bundle which are used for introducing exhaust steam and liquid ammonia, and each cooling unit is connected with a condensed water pipe and an ammonia gas pipe; and meanwhile, the axial flow fan is arranged below the direct cooling tower, and exhaust steam is cooled through air heat exchange. Two times of heat exchange of exhaust steam and liquid ammonia are achieved, the back pressure of an outlet of a steam turbine can be reduced, the coal consumption rate is reduced, the load of the direct cooling tower is reduced, the operation number of axial flow fans is further reduced, the rotating speed of the axial flow fans is reduced, and noise and power consumption of a plant are reduced.

Description

technical field [0001] The invention belongs to the field of power station cooling, and more specifically relates to a direct air cooling system using ammonia cooling energy in an ammonia-doped power plant. Background technique [0002] Northwest China is rich in coal and has a large number of coal-fired power plants. However, due to the shortage of water resources, it is impossible to use water cooling to cool the exhaust steam of steam turbines. Therefore, air cooling technology is widely used in power plants in Northwest China. The air-cooling system is divided into direct air-cooling system and indirect air-cooling system. The direct air-cooling system means that the exhaust steam of the steam turbine passes through the thick exhaust pipe to the outdoor air-cooled condenser, and the axial flow cooling fan makes the air flow through the outer surface of the heat exchanger. The exhaust steam is condensed into water, and the condensed water is pumped back to the boiler. Ho...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a direct air cooling system utilizing ammonia cooling energy in an ammonia-doped power plant, aiming at solving the problems of high noise, high plant power consumption and high steam turbine back pressure in the existing direct air cooling system question

Images