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

Pending Publication Date: 2021-03-26
XI AN JIAOTONG UNIV
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Problems solved by technology

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. Does not conform to the "green and low-carbon" economy advocated by our country

Method used

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  • Hearth and combustor cooling type surface cold flame premixing gas boiler
  • Hearth and combustor cooling type surface cold flame premixing gas boiler
  • Hearth and combustor cooling type surface cold flame premixing gas boiler

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] Such as Figure 1-Figure 3 As shown, the water-cooled burner coupling furnace cooling system in the present invention can realize the mixed gas low temperature and low NO x Uniform surface combustion ensures a uniform low-temperature atmosphere inside the furnace while improving the compactness of the boiler and reducing the footprint. Its main structure is that the inlet of the mixed gas flow is provided with an anti-tempering inlet microchannel 12, the cross-sectional size of the gradually expanding gas channel 11 gradually increases along the propagation direction of the premixed flame, and the high and low cooling components 13a and 13b on both sides are arranged alternately to form an up and down staggered Continuous water-cooling channel 13; U-shaped water-cooling component 5 is arranged in the furnace 4

[0023] Inside, its water inlet is even...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/02F23D14/46F23D14/62F23D14/78
CPCF23D14/02F23D14/46F23D14/62F23D14/78
Inventor 牛艳青薛旭峰惠世恩
Owner XI AN JIAOTONG UNIV
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