Hearth and combustor cooling type surface cold flame premixing gas boiler

A gas boiler and burner technology, applied in the direction of burner, combustion type, gas fuel burner, etc., can solve the problems of environmental pollution, poor economy, high cost, etc., and increase the convective heat transfer and radiation heat transfer in the furnace , Reduce the formation of NOx, the effect of reducing the formation of NOx
CN112555828APending Publication Date: 2021-03-26XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2021-03-26

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Abstract

The invention discloses a hearth and combustor cooling type surface cold flame premixing gas boiler. The boiler comprises a hearth, a water cooling combustor is installed at the position of an inlet of the hearth, an outlet of the hearth is connected to a reversal chamber, U-shaped water cooling components are evenly arranged in the hearth in the circumferential direction, inlets of the U-shaped water cooling components are evenly connected to an annular pipeline in the circumferential direction, and water outlets of the U-shaped water-cooling components and a water outlet of the water coolingcombustor are connected to a boiler water tank. According to the hearth and combustor cooling type surface cold flame premixing gas boiler, by the adoption of the water cooling combustor, uniform gascombustion can be achieved, the flame root combustion temperature is reduced while a local high-temperature area is not generated, generation of thermal NOx at the flame root is reduced, and meanwhile, a hearth cooling system is adopted, a U-shaped pipeline cooling structure is arranged, the compact structure and manufacturing economy of the boiler are achieved while the uniform low-temperature atmosphere in the boiler is guaranteed, and generation of the NOx during gas fuel combustion is further remarkably reduced.
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Description

technical field

[0001] The invention relates to the technical fields of boiler combustion and environmental protection, in particular to a furnace and burner cooling type surface-cooled flame premixed gas boiler. Background technique

[0002] China is a big energy consuming country, and coal resource is one of the main sources of energy in our country. According to the National Bureau of Statistics, my country's raw coal output in 2019 was 3.85 billion tons, a year-on-year increase of 4.0%, and coal consumption accounted for 57.7% of total energy consumption. During the combustion of coal, a large amount of sulfur oxides, nitrogen oxides and some greenhouse gases will be produced, causing serious pollution to the environment; in addition, the cost of harmless treatment of coal-burning pollutants is usually extremely high, and the economy is very poor. It does not conform to the "green and low-carbon" economy advocated by our country. As a clean energy, natural gas produces...

Claims

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