Cooling compensation type air cooling island system

Abstract

The invention provides a cooling compensation type air cooling island system and belongs to the technical field of steam exhaust cooling of steam turbine generator units. According to the cooling compensation type air cooling island system, a compensation cooler is additionally arranged based on an existing air cooling island system; the compensation cooler is installed on a primary pipe of an air extraction pipeline; and meanwhile, each air extraction branch pipeline is provided with a regulating valve, a regulating valve bypass and a compensation cooler bypass. By arranging the compensation cooler on the air extraction pipeline, the volume flow of the air extraction pipeline can be substantially reduced, and accordingly the efficiency of a vacuumizing system is remarkably improved. Through the regulating valves on the vacuumizing pipelines, resistance compensation measures are provided for the resistance characteristics of each row of air cooling radiators, the steam flow of the different rows of air cooling radiators is distributed evenly, thus, the overall cooling capacity of the air cooling island is improved, and the average coal consumption of the units is reduced. Through the composite action of cooling compensation and resistance compensation, aggregation of non-condensable gases of the air cooling radiators can be greatly relieved, and the anti-freezing performance of the air cooling radiators is improved.

Description

technical field [0001] The invention relates to an air-cooling island system, in particular to a cooling compensation type air-cooling island system for direct air cooling of exhaust steam of a turbogenerator set, and belongs to the technical field of exhaust steam cooling of a turbogenerator set. Background technique [0002] The total energy of the fuel in the steam turbine generator set will produce a certain amount of energy loss in the reactor due to incomplete chemical reaction, waste heat discharge, heat dissipation, etc. In addition, in the process of driving the generator to generate electricity, there will be a certain loss of generator efficiency due to coil heating and rotor mechanical loss, and the energy will be converted into electrical energy through the generator. In addition, there are usually 50 More than 100% of the energy must be cooled and released through the exhaust end of the steam turbine in the form of waste steam and waste heat to complete the clo...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of direct air-cooling units such as prominent anti-freezing problems of individual columns in winter and insufficient overall vacuuming capacity in summer, and propose a cooling compensation type air-cooling island system to solve the differences in design, production and installation of different columns in the direct air-cooling system The problem of the difference in resistance characteristics brought about by this will improve the load capacity of the unit in hot summer weather, reduce the accumulation of non-condensable gas in the air-cooled radiator, and improve the antifreeze performance of the air-cooled radiator

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