High-temperature dust-containing flue gas moving particle bed purification and waste heat recovery system

Abstract

The invention provides a high-temperature dust-containing flue gas moving particle bed purification and waste heat recovery system, belongs to the technical field of dust-containing gas filtering, purification and waste heat recovery, and aims to improve purification and waste heat recovery effects. The system comprises a filtering channel, a feeding channel, a discharging channel, a flue gas inlet channel, a flue gas outlet channel, a primary heat exchanger and / or a secondary heat exchanger, wherein the feeding channel is connected with the upper end of the filtering channel, the discharging channel is connected with the lower end of the filtering channel, the primary heat exchanger is arranged inside the filtering channel, the secondary heat exchanger is arranged inside the flue gas outlet channel, and the flue gas inlet channel and the flue gas outlet channel are respectively connected with the upper and lower ends of the filtering channel. The system provided by the invention has the advantages of simple structure, convenient operation, adjustable particle layer thickness, no components such as blocking nets / baffles / pore plates, wide range of suitable temperature, high filtering efficiency, low filtration pressure drop, high waste heat recovery rate and capability of continuously and stably running.

Description

technical field [0001] The invention relates to the technical field of dust-laden gas filtration and purification and waste heat recovery, in particular to a high-temperature dust-laden flue gas moving particle bed purification and waste heat recovery system. Background technique [0002] High-temperature gas and flue gas purification and waste heat recovery in high-energy-consuming and high-emission industries such as metallurgy, chemical industry, building materials, and energy play an important role in my country's energy conservation and emission reduction. High-temperature flue gas contains easily condensable / coagulable components, such as tar gas, condensable alkali metal vapor, etc., reducing the temperature of the flue gas to solidify the condensable dust particles and filtering is the main way to purify this type of flue gas, including cyclone dust removal, wet However, the above methods have relatively low dust removal efficiency, serious secondary pollution, and c...

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Problems solved by technology

[0003] Due to the characteristics of intermittent, high dust content, corrosiveness and scattered waste heat resources in industrial high-temperature flue gas, the current waste heat recovery technology has the following bottleneck problems: 1) Lack of efficient condensable dust particles (such as easy to condense Tar gas, alkali metal vapor, easily solidified molten metal, etc.) high-temperature dust-containing flue gas purification and heat exchange technology; 2) For waste heat recovery of high-temperature and high-dust-containing flue gas, the heat exchange surface is clogged with ash, wear and corrosion problems are serious, and The specific surface area of ​​heat exchange is limited, and the recovery rate of residual energy is low; 3) There is a lack of effective integrated technology for deep purification and heat exchange of high-temperature flue gas containing submicron dust particles

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