Low-nitrogen hot water boiler with replaceable sleeve type water-cooling burning head

Abstract

The invention discloses a low-nitrogen hot water boiler with a replaceable sleeve type water-cooling burning head. The boiler comprises a combustion chamber and the sleeve type water-cooling burning head arranged at a fuel gas inlet of the combustion chamber, the sleeve type water-cooling burning head comprises a porous graphite burning head and a water cooling part, and the porous graphite burning head comprises an opening section and a double-layer graphite thin cylinder section; the opening section is arranged outside the combustion chamber, the double-layer graphite thin cylinder section is arranged inside the combustion chamber, and multiple rows of through holes are formed in the double-layer graphite thin cylinder section in the length direction; one end of the water cooling part is arranged on the opening section of the porous graphite burning head in a sleeving manner, the other end of the water cooling part is arranged at the outer side of the double-layer graphite thin cylinder section in the length direction and connected with a metal baffle, and the water cooling part is detachably connected with the outer wall of the combustion chamber; and according to the low-nitrogen hot water boiler, the difficulty in checking and replacing a water cooling pipe in the long-term service process of a water cooling combustor is overcome, meanwhile, the effects of treating the combusted flue gas, recycling the heat of the flue gas and reducing the content of pollutants in the flue gas are achieved, and the clean low-nitrogen combustion effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of clean combustion of ultra-low nitrogen and harmless chemicals, in particular to a low-nitrogen hot water boiler with a replaceable sleeve-type water-cooled burner. Background technique [0002] With the rapid development of the economy, my country's urban energy has also begun to switch to natural gas, especially the implementation of the "West-to-East Gas Transmission" project, which marks the arrival of the natural gas era of urban gas in China. After comparing the emissions of oil, coal and natural gas in the combustion process, it is found that the gas emissions of natural gas are much less than those of other fuels, only the emission of NOx is on the same order of magnitude. With the rapid development of the natural gas industry, the pollution of nitrogen oxides produced after the combustion of natural gas cannot be ignored. Therefore, the development of ultra-low nitrogen gas burners is of great si...

AI Technical Summary

Problems solved by technology

However, the water-cooled tubes are often deformed under the influence of high-temperature flames during long-term service, which seriously affects the safety of the burner, and the water-cooled tubes are often welded to the boiler body, which brings many difficulties to the inspection and replacement of the water-cooled tubes. and cost

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