Flue gas waste heat recovery device

Abstract

The invention relates to a flue gas waste heat recovery device which comprises an outer shell, a vertical inner air duct and a circulating water system. An air inlet pipe is arranged on one side of the outer shell, an air outlet pipe and the circulating water system are arranged on the other side of the outer shell, the air inlet pipe is communicated with the vertical inner air duct, and a spiral blade is arranged in the vertical inner air duct. The spiral blade is of a spiral rising structure around a circulating water vertical pipe, and four receiving hoppers which are connected up and down are arranged in the outer shell. In industrial production, waste heat of waste gas accounts for a large amount of heat losses, high-temperature flue gas exhausted by an asphalt mixing plant contains a large amount of water vapor and carries a large amount of waste heat, the waste heat in the flue gas can be recycled, a large amount of energy can be saved, fuel is saved for subsequent stone drying, and air pollution is greatly reduced. And meanwhile, the production cost of enterprises can be reduced, and important practical significance is also achieved for meeting the strategic requirements of energy conservation and emission reduction.

Description

technical field [0001] The invention belongs to the field of recovery of high-temperature flue gas waste heat in industrial production, and in particular relates to a flue gas waste heat recovery device. Background technique [0002] In the energy expenditure of the industrial production process, the proportion of exhaust gas waste heat is about 15% to 35%, and the heat loss of flue gas accounts for 5% to 8% of the various heat losses. Asphalt mixing is the main technology for batch production of asphalt concrete in pavement engineering. During the production process of asphalt mixing station, a large amount of flue gas with waste heat will be generated. The flue gas contains a large amount of water vapor and carries a large amount of latent heat, and a large amount of flue gas is emitted. In the existing production process, a large amount of high-temperature flue gas from the asphalt mixing plant is directly discharged into the atmosphere, which not only seriously pollutes...

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Problems solved by technology

[0003] Provide a flue gas waste heat recovery device, which is used to solve the problems of water vapor removal and flue gas waste heat recovery in high-temperature flue gas of asphalt mixing plant

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