Energy tower for drying flue gas of gas-fired boiler and boiler flue gas drying method

Abstract

The invention provides an energy tower for drying flue gas of a gas-fired boiler and a boiler flue gas drying method, and relates to the technical field of boiler gas-fired equipment. The energy tower for drying the flue gas of the gas-fired boiler comprises a hot water tank, a spraying heat exchange area, a packing layer, a rotational flow plate, a baffle plate heat exchange device, a reheater and a negative pressure fan, the hot water tank is arranged below the packing layer and a rotational flow plate, high-temperature flue gas enters the packing layer through spraying heat exchange, then the flue gas is dehumidified by the rotational flow plate and the baffle plate heat exchange device, then is heated by the reheater, and is discharged into a chimney through the negative pressure fan, and the flue gas enters a flue after being dewatered, so that condensed water is not generated any more. The energy tower is used for recovering heat in the flue gas and removing more than 90% of moisture in the flue gas at the same time, and has the advantages of environmental protection and high efficiency.

Description

technical field [0001] The invention relates to the technical field of boiler gas equipment, in particular to an energy tower for drying gas boiler flue gas and a boiler flue gas drying method. Background technique [0002] Gas combustion (CH 4 +2O 2 =CO 2 +2H 2 O) A large amount of water vapor will be generated (1.55KG water vapor is produced by burning 1 cubic natural gas). The water vapor contains a large amount of latent heat of vaporization, which accounts for about 8-10% of the boiler efficiency. Traditional heat exchangers cannot convert 55-65 The low-grade heat energy in the low-temperature flue gas is recovered, and the low-temperature flue gas passes through the flue and condenses into water during the discharge process. The condensed water has a weak acidity and long-term corrosion of the metal flue or reinforced concrete flue, resulting in water leakage and water seepage in the flue , this technology uses the direct contact heat exchange method, which can red...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of gas-fired boiler flue gas carrying water and flue gas pipelines that are easily corroded, the present invention provides an energy tower for drying gas-fired boiler flue gas and a boiler flue gas drying method. The specific technical scheme is as follows

Images