High-quality waste heat recovery anticorrosion device and working method thereof

Abstract

The invention relates to a high-quality waste heat recovery anticorrosion device and a working method thereof. The device includes an air preheater system, a high-quality waste heat recycling system,a dry dedusting system, an induced draft fan, a deep waste heat recovery air preheating system, a high-efficiency desulfurizing and dedusting system, a chimney, a next-stage low pressure heater system, an upper-stage low pressure heater system and a primary fan; the air preheater system, the high-quality waste heat recycling system, the dry dedusting system, the induced draft fan, the deep waste heat recovery air preheating system, the high-efficiency desulfurizing and dedusting system and the chimney are sequentially connected along the flow direction of flue gas; the next-stage low pressureheater system, the high-quality waste heat recycling system and the upper-stage low-pressure heater system are sequentially connected along the flow direction of condensate water; and the primary fan,the deep waste heat recovery air preheating system and the air preheater system are sequentially connected along the direction of air. The high-quality waste heat recovery anticorrosion device has areasonable structure design, and overcomes a defect that existing environmentally-friendly reconstruction technologies cannot simultaneously achieve energy saving and emission reduction.

Description

technical field [0001] The invention relates to a high-quality waste heat recovery anti-corrosion device and a working method thereof. Background technique [0002] In order to meet the requirements of the new environmental protection regulations, coal-fired units have fully implemented ultra-low emission transformation, and the ultra-low emission transformation has reduced pollutant emissions while increasing energy consumption, mainly reflected in the increase in power consumption of equipment and the increase in system resistance. According to statistics, after denitrification ultra-low emission transformation, it is estimated that the plant power consumption rate will increase by 0.09%, after dust removal ultra-low emission transformation, the plant power consumption rate is expected to increase by 0.16%, and after desulfurization ultra-low emission transformation, the plant power consumption rate is expected to increase by 0.56%. Therefore, the retrofitting of flue gas ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a high-quality waste heat recovery anti-corrosion device and its working method with a reasonable structural design, which overcomes the inability of the existing environmental protection transformation technology to simultaneously save energy and reduce emissions

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