Forced spiral finned coil pipe condensation heat-supply heat exchanger

Abstract

The invention discloses a forced spiral finned coil pipe condensation heat-supply heat exchanger, which comprises a shell, a combustor arranged in the shell and a plurality of spiral finned coil pipes, wherein a water inlet, a water outlet and a smoke outlet are formed on the shell; the combustor is connected with an air and gas inlet device; the combustor is positioned on the upper part of the shell; the periphery of the combustor is coaxially provided with a group of pipe bundles consisting of a plurality of spiral finned coil pipes; a smoke exhaust pipeline which consists of a plurality of tightly arranged spiral finned coil pipes is arranged below the combustor; the smoke exhaust pipeline is emptied through a smoke outlet; the water inlet is communicated with the spiral finned coil pipes which are tightly arranged below the combustor; the spiral finned coil pipes which are tightly arranged below the combustor are communicated with the spiral finned coil pipes at the periphery of the combustor; and the spiral finned coil pipes at the periphery of the combustor are communicated with the water outlet. The inwards folded finned straight pipes serve as basic elements of the heat exchanger, the heat exchange on the smoke side is intensified, and the size of the whole heat exchanger is further reduced.

Description

technical field [0001] The invention belongs to the field of thermal equipment, in particular to a forced spiral fin coil condensation heat supply heat exchanger. Background technique [0002] As early as the Middle East oil crisis in the 20th century, in order to save energy, a condensing boiler with high thermal efficiency was developed in Europe. Its remarkable feature is that the thermal efficiency is more than 10% higher than that of conventional design boilers. Since the exhaust gas temperature of the boiler is lowered above the dew point, a large amount of water vapor in the flue gas condenses and releases the latent heat of vaporization, which has obvious energy-saving effects. The condensing heat exchanger used in the condensing boiler is developed according to its principle. . [0003] The heat available for gas combustion includes two parts: the sensible heat of the flue gas and the latent heat of water vapor in the flue gas. The ordinary heat exchanger is limit...

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Problems solved by technology

[0013] Therefore, the technical problem to be solved by the present invention is how to overcome the problem of insufficient heat exchange in the flue gas flow path caused by the insufficient design of the heat exchanger structure in the prior art, and how to improve the structure of the heat transfer surface to increase the heat exchange area and improve the heat transfer efficiency. The purpose of thermal efficiency is to make the boiler smaller and occupy a smaller volume under the same power, and how to skillfully combine the air preheater into the heat exchanger, so as to perform secondary heat exchange and improve air intake The initial temperature while further reducing the exhaust gas temperature

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