Cabin dehumidificating and desalting micro positive pressure system of wind generating set at sea and in intertidal zone

Abstract

The invention relates to wind power generation equipment and discloses a cabin dehumidificating and desalting micro positive pressure system of a wind generating set at sea and in an intertidal zone. The system is characterized in that a dehumidification and filtration device is arranged on an appointed air inlet in a cabin; the other gap part except the appointed air inlet in the cabin is relatively sealed or is independent from an air passage way in the cabin, thus forming a relative sealed space; the air entering into the cabin from the appointed air inlet is subjected to dehumidification and filtration of particles with certain diameter; and through humidity, salt mist and flow control, the dehumidificated and desalted air which is relative dry and pure is filled into the whole cabin, thus forming a micro positive pressure, thereby ensuring the parts in the cabin to work in an environment similar to the land air environment and maximumly reducing the corrosion on the parts caused by the moist and salt fog at sea. In terms of the whole antiseptic system, only the local structure is improved, the system provided by the invention has the advantages of low cost, simplicity for implementation, high reliability, low technical requirement on the equipment and easiness for maintenance.

Description

Technical field: [0001] The invention relates to wind power plants. technical background: [0002] At present, wind power generation has developed rapidly in my country, and the installed capacity has shown explosive growth. With the massive development of onshore wind resources and the huge development prospects of offshore wind resources, it is natural to develop offshore wind power. Offshore wind resource conditions are better than those on land, and there are limited sites suitable for installing wind turbines on land. However, compared with onshore wind power generation, offshore wind power generation has many difficulties. Corrosion protection of offshore wind turbines is one of the difficulties. [0003] At present, the main methods used in China in terms of anti-corrosion are: improving the anti-corrosion level of parts; improving the insulation level or increasing the thickness of the anti-corrosion coating. These methods are relatively high in cost and low in rel...

AI Technical Summary

Problems solved by technology

[0004] 1. The high humidity and high salt spray in the atmosphere have strong corrosion on the components of the unit. The longest anti-corrosion period of the anti-corrosion coating is 15 years, which cannot reach the design period of 20 years for wind turbines.

[0005] 2. Due to manufacturing process problems, some crevices are prone to occur. Once crevice corrosion occurs, the anti-corrosion layer will be helpless, and parts will soon be damaged due to corrosion or life will be shortened

[0006] 3. Although the anti-corrosion level has been improved, electronic components work in high salt spray and high humidity environments for a long time, salt spray particles will form on the surface, and a film will be formed on the surface of electronic components after moisture absorption, which may easily cause poor contact of electrical components , corrosion, short circuit and other hazards; mechanical parts are also prone to surface or contact surface corrosion, resulting in mechanical failure

[0007] 4. Increasing the anti-corrosion level or using the marine level for each component will result in a significant increase in cost, and the operation is complicated

[0009] This method has low efficiency and low reliability, that is, the air quality is difficult to control, so that a good anti-corrosion effect cannot be achieved

Compared with the separation of water and salt particles by the centrifugal force of pressurized air, more water and salt spray will be dropped at high speed, but the high-speed airflow will then take away part of the water and salt particles; at low speed, larger particles will not be removed. Particles of water and salt spray particles, so that the set air quality cannot be achieved in the specified space

[0010] In addition, this method requires high equipment

In order to achieve the effect of throwing out water or salt particles, the airflow must be generated at a higher speed. In this way, the air pressure generating device is required to be higher, and the high-speed airflow needs to pass through a long channel with bends, which requires airtightness of the channel. There are very high requirements, otherwise the pressure will be released, which will affect the reliability of the device

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