System of using LNG cold energy in spray cooling of air cooling tower

Abstract

The invention discloses a system of using LNG cold energy in spray cooling of an air cooling tower. The system comprises an LNG gasifying system, an LNG cold energy utilization system and an air cooling tower spray cooling system. The LNG gasifying system is arranged next to an LNG storage tank, is connected to the LNG cold energy utilization system in a parallel manner, and comprises a high pressure water bath type gasifier. When the LNG cold energy is utilized, part of LNG enters into the high pressure water bath type gasifier to be gasified as a fuel entering into a gas turbine; the LNG cold energy utilization system recovers cold energy of LNG gasification through a two-stage heat exchange system and part of cold energy is used for reducing the water temperature of external water, and the cooled cold water enters into a spray water storage tank of the air cooling tower spray cooling system; the air cooling tower spray cooling system feeds spray water in the spray water storage tank into optimally arranged nozzles. By means of spray cooling, spray is evaporated fully without corroding an air cooling heat dissiaptor in the air cooling tower. The system disclosed by the invention is suitable for a combined-cycle power plant which takes LNG as the fuel and the air cooling tower as a cooling system.

Description

technical field [0001] The invention belongs to the field of power station cooling systems, and in particular relates to a system in which LNG cold energy is used for spray cooling of an air cooling tower. The LNG cold energy is used to improve the spray cooling capacity of the air cooling tower under high temperature conditions in summer. Background technique [0002] my country is a country with severe water shortage. As industrialization, urbanization, and population growth continue, the problem of water scarcity becomes more acute. In the wet cooling tower, the cooling water transfers waste heat directly to the air mainly through evaporation and heat dissipation, which will cause a large amount of water resource consumption. In the air-cooling tower, air and cooling water exchange heat through the air-cooling radiator, and the cooling water transfers waste heat to the air through convective heat exchange, avoiding the consumption of water resources caused by direct cont...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low heat exchange efficiency of air cooling towers under high temperature conditions in summer, and propose a system for using LNG cold energy for spray cooling of air cooling towers

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