A gas-fired condensing boiler with narrow gap combustion and heat exchange

Abstract

The invention discloses a gas condensation boiler with a narrow gap combustion and heat exchange function. The gas condensation boiler comprises a combustor and a heat exchanger, wherein the narrow gap combustor installed in the center of a boiler top plate is composed of a blower, a mixer and a water-cooled combustion head; the heat exchanger is formed by uniformly arranging three circles of corngrain-shaped straight pipes in the circumferential direction, wherein the inner circle of corn grain-shaped straight pipe and the outer circle of corn grain-shaped straight pipe are narrow in the inner sides and wide in the outer sides, and the third circle of corn grain-shaped straight pipe is coupled with the combustion head; the blower feeds air into the mixer to be fully mixed with gas, the mixture enters the combustion head cavity to be discharged from narrow gaps between the water cooling straight pipes which are uniformly distributed in the circumferential direction, after ignition, the mixture is uniformly combusted in the circumferential and axial directions and radiates heat towards the inner tube ring, the narrow gap between the inner and outer circles of straight pipes is washed by the flue gas in sequence to realize the intensified heat exchange of the narrow gap laminar flow, and the flue gas flows downwards into an exposed disc from the gaps between the outer shell andthe outer straight pipes and is discharged into the atmosphere from a flue gas outlet. The gas condensation boiler has the advantages of being simple in structure, capable of realizing laminar flow strengthening, compact in heat exchange, low in nitrogen emission and high in thermal efficiency.

Description

technical field [0001] The invention relates to the technical field of integral condensing boilers, in particular to a gas-fired condensing boiler with narrow gap combustion and heat exchange. Background technique [0002] my country is a big country of energy production and consumption. Energy conservation and emission reduction and improvement of energy utilization efficiency are important tasks we face. At the same time, my country's environmental governance still needs to be strictly controlled. The smog problem continues and occurs frequently, and the smog phenomenon in the northern heating season is even worse. for serious. For a long time, my country's energy production and consumption have been dominated by coal. my country's air pollution belongs to the "first generation" soot-type pollution, which is mainly caused by coal combustion. In order to control smog, the heating industry proposes that the clean heating rate will be 50% to replace 74 million tons of scatte...

AI Technical Summary

Problems solved by technology

Cast aluminum-silicon-magnesium modular commercial gas-fired condensing water heaters have high efficiency and compact structure, but molds and materials are expensive, domestic production capacity is extremely limited and core technology is controlled by foreign countries; commercial gas-fired stainless steel coil condensing water heaters are large in size and Heavy, complicated coil process and high cost

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