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Ultra-low nitrogen premixed gas burner and combustion method thereof

A gas burner, ultra-low nitrogen technology, applied in the direction of combustion methods, gas fuel burners, burners, etc., can solve the problems of limited use of burners, reduced combustion efficiency, etc., and achieve simple installation, stable combustion, and high combustion flame short effect

Pending Publication Date: 2019-12-13
ZHEJIANG UNIPOWER BOILER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the problem of flue gas recirculation technology and fully premixed surface combustion technology in reducing NO X At the same time, the combustion efficiency will be reduced, and the water-cooled premixed combustion will reduce the NO X To solve the problem that the use of the burner will be restricted while discharging, an ultra-low nitrogen premixed gas burner and its combustion method are provided

Method used

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  • Ultra-low nitrogen premixed gas burner and combustion method thereof
  • Ultra-low nitrogen premixed gas burner and combustion method thereof
  • Ultra-low nitrogen premixed gas burner and combustion method thereof

Examples

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Embodiment 1

[0034] Such as Figure 1-7 As shown, this embodiment is an ultra-low nitrogen premixed gas burner, including several nozzles 9 arranged at the end of the burner, and the burner is connected to the furnace through the nozzles 9 . The premixed gas in the burner is evenly distributed through the nozzle 9 and enters the furnace, and the premixed gas is ignited at the outlet end of the nozzle 9 and then defires and burns in the furnace. The nozzle 9 includes a hollow shell 12 and a solid blunt body 13 , the shell 12 is sheathed outside the blunt body 13 , and a channel for the premixed gas to flow is formed between the shell 12 and the blunt body 13 . The casing 12 is cylindrical with two ends open, the blunt body 13 is cylindrical, and the length of the casing 12 is basically the same as that of the blunt body 13 . In this embodiment, a large number of nozzles 9 are arranged at the end of the burner, so that the premixed gas circulates in the channels of the nozzles 9 and defires...

Embodiment 2

[0039] This embodiment also provides a combustion method of an ultra-low nitrogen premixed gas burner, comprising the following steps:

[0040] S1, mix air and gas according to the set ratio to form premixed gas, and pass the premixed gas into the distribution chamber;

[0041] S2, the premixed gas in the distribution chamber is evenly distributed through several nozzles and then enters the furnace:

[0042] S3, igniting the premixed gas at the outlet of the nozzle, so that the premixed gas is defired and burned in the furnace.

[0043] Wherein, in step S1, several nozzles with a certain length are provided on the outlet end surface of the distribution chamber. In step S2, the premixed gas in the distribution chamber enters the furnace along the channel in the nozzle. In step S3, the premixed gas is defired and burned, the combustion is violent, the combustion flame is short, the combustion is stable, the heat transfer efficiency is high, and the NOx content of the generated...

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Abstract

The invention relates to the technical field of gas combustion devices, in particular to an ultra-low nitrogen premixed gas burner and a combustion method thereof. The ultra-low nitrogen premixed gasburner comprises a plurality of nozzles arranged at the tail end of the burner, and premixed gas in the burner enters a hearth after being uniformly distributed through the nozzles; after the premixedgas is ignited at the outlet ends of the nozzles, the premixed gas is subjected to blowoff combustion in the hearth; and the nozzles comprise hollow shells and solid blunt bodies, the blunt bodies are sleeved with the shells, and channels for premixed gas to flow are formed between the shells and the blunt bodies. According to the ultra-low nitrogen premixed gas burner, a full premixing combustion mode is adopted, and the plurality of nozzles are arranged at the tail end of the burner, so that the premixed gas flows in the nozzle channels and is blowoff combusted at the outlets of the nozzles, and low nitrogen oxide (NOx) emission is realized without reducing the combustion efficiency.

Description

technical field [0001] The invention relates to the technical field of gas combustion devices, in particular to an ultra-low nitrogen premixed gas burner and a combustion method thereof. Background technique [0002] Nitrogen oxides form acid rain, which is one of the components of air pollutants and one of the main components of smog. Beijing has promulgated a new "Emission Standard of Air Pollutants for Boilers", which stipulates that starting from April 1, 2017 , the NOx emission limit of all gas-fired boilers in use is 80mg / m 3 , new gas boiler nitrogen oxide NO X The emission limit is 30mg / m 3 , which puts forward the requirement of low nitrogen emission to the current combustion device. [0003] Gas combustion low-nitrogen combustion control technology mainly reduces the synthesis of nitrogen oxides by reducing the flame temperature. At present, there are three main types of gas combustion low-nitrogen combustion technologies on the market: flue gas recirculation t...

Claims

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Application Information

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IPC IPC(8): F23D14/02F23D14/46F23D14/48F23D14/62
CPCF23D14/02F23D14/46F23D14/48F23D14/62
Inventor 陈国良邱尔鹏郑国军
Owner ZHEJIANG UNIPOWER BOILER CO LTD
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