Air-cooled steam condensing system with natural ventilation and direct water film evaporation

A natural ventilation, air-cooled condenser technology, applied in steam/steam condensers, lighting and heating equipment, etc., can solve problems such as system complexity and initial investment increase

CN101776401AInactive Publication Date: 2010-07-14HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2010-07-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an air-cooled steam condensing system with natural ventilation and direct water film evaporation, which comprises a natural ventilation cooling tower and a direct water film evaporation type air-cooled cluster steam condenser arranged above the water pool of the cooling tower. Waste steam from a steam turbine flows through the tube of the steam condenser to release heat so as to be condensed into water to be discharged; and spray water forms a water film outside of the tube, flowing air sweeps the water film, and the water film absorbs the heat of the waste steam in the tube and transmit sensible heat and the latent heat generated in the evaporation of the water film to the flowing air. The spray water then falls into the water pool of the cooling tower, and is delivered to a spray water distribution device above each tube bundle of the steam condenser by a circulating pump. The system consumes a certain amount of evaporated water, thereby significantly improving the heat cycling efficiency. No fan is applied to consume power, thereby reducing the service power. Moreover, the system can overcome the defect that the direct dry-air-cooled steam condensation can not be completed and realized in the high-temperature environment. Compared with the water-cooled steam condensation, the system can obtain a steam condensation temperature lower than the water-cooled steam condensation, achieve higher heat cycling efficiency, and significantly reduce water consumption. Therefore, the system is applicable to areas with abundant water resources but stricter and stricter water-saving requirements.
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Description

technical field

[0001] The invention relates to a steam power cycle system of a thermal power plant, a nuclear power plant, a self-contained power plant in a process industry, or a steam turbine generator set for waste heat power generation, and in particular to a condensing system that adopts natural ventilation and direct water film evaporation and air cooling. Background technique

[0002] The steam power cycle (also known as the Rankine cycle) of thermal power, nuclear power and other steam turbine generator sets converts steam heat energy into mechanical energy, and then converts mechanical energy into electrical energy. as attached figure 1 As shown, the area enclosed by the Rankine cycle line on the temperature-entropy diagram is the mechanical energy that can be converted and output by steam heat energy. The reason why it is called cycle is that the steam state has to go through the state cycle process of high temperature and high pressure steam → low temperature an...

Examples

Embodiment Construction

[0072] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. But the present invention is not limited to the embodiments, technical solutions formed by those skilled in the art making some non-essential modifications to the present invention are all within the protection scope of the present invention.

[0073] refer to image 3 , the natural ventilation direct water film evaporation air cooling system of the present invention is mainly used for exhaust steam condensation of steam turbine generator sets such as thermal power or nuclear power. The system is mainly composed of direct water film evaporation air-cooled group condensers and natural draft cooling towers, and is characterized in that multiple direct water film evaporation air-cooled The lower part, above the cooling tower pool. Therefore, this system can also be referred to as "condensation air cooling tower". image 3 Totally ten kinds of equ...