Condensation boiler and water preheating device thereof

Abstract

The invention discloses a condensation boiler and a water preheating device thereof. The condensation boiler comprises a condensing heat exchanger, a combustion chamber, a residual smoke flue and the water preheating device, wherein the top cylinder wall of the combustion chamber is provided with multiply uniformly-distributed smoke guide tubes; the condensing heat exchanger is internally provided with a condensation dehydrator; a water feeding device is arranged between the combustion chamber and the condensation dehydrator; a tube port of the water feeding device is connected with a feedwater shunting spraying nozzle; the water preheating device comprises a gas exhaust tube, a water outlet tube, a heat exchange box, a spiral heat exchanger tube, a water inlet tube, a waste liquid discharge tube and a gas inlet tube. By virtue of the smoke guide tubes and the condensation dehydrator, high-temperature smoke can be in direct contact with boiler feedwater so as to exchange heat, so that the thermal efficiency is effectively improved, the temperature of exhaust smoke is reduced and the environment pollution is reduced; the cooled afterheat smoke is cooled and recycled once again by virtue of the water preheating device; hot water subjected to heat exchange is used as preheating water so as to be effectively used, and the production cost is lowered.

Description

technical field [0001] The invention relates to a heat exchange device, in particular to a condensing boiler and its preheating water device. Background technique [0002] The condensing boiler is to use the high-efficiency condensation waste heat recovery device to absorb the sensible heat in the high-temperature flue gas discharged from the boiler and the latent heat released by the condensation of water vapor to achieve the purpose of improving the thermal efficiency of the boiler. In order to reduce the exhaust gas temperature and improve the thermal efficiency of the boiler, the measures taken by the condensing hot water boiler are to keep the flue gas in the boiler flue as much as possible so that the flue gas can fully contact with water, and to make the water vapor content in the exhaust gas as much as possible However, the devices for implementing these measures in the prior art have the problems of complex structure and poor effect, so that the exhaust gas temperat...

AI Technical Summary

Problems solved by technology

In order to reduce the exhaust gas temperature and improve the thermal efficiency of the boiler, the measures taken by the condensing hot water boiler are to keep the flue gas in the boiler flue as much as possible so that the flue gas can fully contact with water, and to make the water vapor content in the exhaust gas as much as possible However, the devices for implementing these measures in the prior art have the problems of complex structure and poor effect, so that the exhaust gas temperature of the condensing hot water boiler cannot be significantly reduced in practice, and the exhaust port of the condensing hot water boiler is also Most of the white smoke takes away more heat. If this part of heat is recycled, it can not only reduce production costs, improve boiler thermal efficiency, but also protect the environment.

Images