Three-return-stroke vertical gas boiler

Abstract

The invention relates to the technical field of boilers, and particularly relates to a three-return-stroke vertical gas boiler. The three-return-stroke vertical gas boiler comprises a shell, a returnstroke assembly and a preheater. The return stroke assembly used for driving smoke to return multiple times so as to improve smoke heat utilization is installed in the shell. The preheater used for utilizing waste heat of smoke exhausted from the interior and the exterior of the shell and the shell are installed on a boiler base side by side. According to the three-return-stroke vertical gas boiler, a vertical framework is adopted in the gas boiler, a short smoke pipe and a long smoke pipe are distributed on the two sides of a corrugated boiler furnace, and therefore the heating temperature ofwater liquid in the short smoke pipe side is higher than that of water liquid in the long smoke pipe side, the water liquid at the short smoke pipe is diffused towards the position above the water liquid in the long smoke pipe, and the water liquid at the long smoke pipe is diffused towards the position below the water liquid in the short smoke pipe to form convection; and due to the fact that the water liquid on the two sides of the corrugated boiler furnace constantly carries out convection to form water liquid inner circulation, the temperature difference of the water liquid on the two sides in the gas boiler is small, the steam generation speed is higher, and the heating efficiency of the boiler is improved.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a three-pass vertical gas boiler. Background technique [0002] The boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electric energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of heat energy. The original meaning of the pot refers to the water container heated on the fire, and the furnace refers to the place where fuel is burned. The boiler includes two parts: the pot and the furnace. The hot water or steam generated in the boiler can directly provide the required heat energy for industrial production and people's life, and can also be converted into mechanical energy through a steam power device, or converted into electrical energy through a generator. Boilers that provide hot water are called hot water boilers, which are mainly used in daily life, an...

AI Technical Summary

Problems solved by technology

[0003] However, the existing vertical gas-fired boilers generally adopt a single-return or double-return structure to realize radiation heat transfer and convective heat transfer, and the overall heat transfer efficiency is low. The technology of boiling in the boiler causes the vertical gas boiler to generate steam slowly in the water-liquid heating chamber, and some vertical gas-fired boilers with additional preheating tanks require additional equipment to preheat the internal water liquid, resulting in the overall The structure is complex, and when the existing vertical gas boiler heats the water liquid, the internal water liquid heating is prone to unbalanced problems, which leads to the problem of slow steam generation

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