Condensing boiler

Abstract

The invention provides a condensing boiler which comprises a combustor, a combustion chamber, a condensing heat exchange barrel, an inner circulating system and an outer circulating system. The combustion chamber is disposed in the condensing heat exchange barrel, a connecting pipeline on the side wall of the combustion chamber penetrates out of the condensing heat exchange barrel and is used for being connected with the combustor, a top barrel wall of the combustion chamber is connected with a smoke diversion elbow, a smoke outgoing port of the smoke diversion elbow is formed downwards, and a boiler inner circulating spray device, a water feeding spray device and an air preheating system are arranged above the smoke diversion elbow. The inner circulating system is characterized in that boiler water is circulated into the inner circulating spray device above the combustion chamber in a forced manner, inner circulation of the boiler water is enhanced, and heat is absorbed better. Through a special arrangement mode of the combustor, the smoke diversion elbow, the spray devices, a demisting and preheating device and the inner and outer circulating systems, so that the condensing boiler is more convenient and quicker to mount, direct contact of high-temperature smoke with boiler feed water for heat exchange can be efficiently realized, the temperature of discharged smoke can be lowered fully, and heat efficiency of the boiler can be improved fully.

Description

technical field [0001] The invention relates to the technical field of condensing boilers, and provides a condensing boiler in which fully combusted high-temperature flue gas and boiler low-temperature feed water directly contact and exchange heat. technical background [0002] The purpose of the condensing boiler is to reduce the exhaust gas temperature at the boiler outlet, release the latent heat of vaporization of water vapor, improve the thermal efficiency of the boiler, and comprehensively reduce the emission of pollutants in the flue gas. The measures taken are to allow the clean burning high-temperature flue gas to fully contact the boiler feed water in the boiler, quickly reduce the temperature of the hot flue gas, reduce the temperature of the water vapor in the flue gas to below the dew point, and fully reduce the concentration of water vapor in the flue gas. content, fully absorb the latent heat of vaporization of water vapor, improve boiler thermal efficiency, a...

AI Technical Summary

Problems solved by technology

However, the devices for implementing these measures in the prior art have the problems of complex structure or defective layout and poor operation effect, which makes the installation and operation of the boiler inconvenient in actual implementation, and the exhaust gas temperature cannot be significantly reduced. In addition, The exhaust port of the condensing boiler emits white smoke and takes away a lot of heat, which affects the heating effect

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