Through-flow type narrow-clearance integral condensation hot-water boiler

Abstract

A through-flow type narrow-clearance integral condensation hot-water boiler comprises a shell. An annular water outlet header is arranged on the upper portion of the shell, an annular water feeding header is arranged on the lower portion of the shell, a deep condensation heat exchange tube bundle and a V-shaped condensation collecting device with a condensate neutralizing treatment device are arranged below the annular water feeding header, an all-premixing metal fiber combustor is arranged on a top plate of a boiler, a metal fiber head of the all-premixing metal fiber combustor penetrates into a radiation heat exchange space so as to realize the characteristic of high radiation heat exchange capacity of the metal fiber head, the annular water outlet header is communicated with the annular water feeding header via inner and outer circles of annular water cooling walls consisting of a plurality of vertical water tubes, a clearance with the size of 1-2mm is reserved between each two adjacent vertical water tubes and is used as a smoke circulation channel, smoke realizes convection heat exchange and condensation heat exchange when flowing among the vertical water tubes, heat is transmitted to working medium water in the vertical water tubes, the deep condensation heat exchange tube bundle deeply cools the smoke, and efficiency of the boiler is improved. In addition, the through-flow type narrow-clearance integral condensation hot-water boiler is simple in structure and convenient in manufacture, and can effectively avoid the harm that tubes are easy to be exploded due to uneven heat load distribution of a traditional through-flow boiler.

Description

technical field [0001] The invention belongs to the technical field of thermal energy engineering, in particular to a through-flow narrow-gap integral condensing hot water boiler. Background technique [0002] With the adjustment of my country's energy structure, coal will gradually withdraw from primary energy consumption, and the proportion of natural gas in primary energy will increase year by year. At the same time, due to the improvement of people's living standards and the requirements for living environment, natural gas will be replaced Coal, especially in large and medium-sized cities, relevant laws and regulations have been issued to prohibit the operation of coal-fired boilers in cities. Therefore, it is the general trend to develop efficient and environmentally friendly natural gas thermal energy utilization devices. [0003] The exhaust gas temperature of conventional gas-fired boilers is generally above 150°C, which is much higher than the water dew point temper...

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Problems solved by technology

However, the use of extended heating surface structure will inevitably lead to complex structure and increase the difficulty of maintenance and repair

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