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Smoke internal circulation low-nitrogen combustor

A low-nitrogen burner and internal circulation technology, which is applied to gas fuel burners, burners, combustion methods, etc., to achieve the effects of avoiding high temperature areas, prolonging combustion time, and reducing NOx emissions

Inactive Publication Date: 2016-02-03
SHANGHAI QIYAO THERMAL ENERGY ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional flue gas recirculation method needs to re-arrange the circulating flue gas pipeline and purchase a circulating fan, which not only increases the investment, but also puts forward new requirements for operation management

Method used

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  • Smoke internal circulation low-nitrogen combustor
  • Smoke internal circulation low-nitrogen combustor

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Embodiment Construction

[0010] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

[0011] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0012] Please refer to figure 1 , figure 2 , the flue gas internal circulation low-nitrogen burner provided by the present invention includes an outer cylinder 3, an inner cylinder 17 is arranged in the outer cylinder 3, and a main gas is arranged in the gap between the outer cylinder 3 and the ...

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Abstract

The invention discloses a smoke internal circulation low-nitrogen combustor which comprises an outer barrel. An inner barrel is arranged in the outer barrel. Main gas spray guns are arranged in a clearance between the outer barrel and the inner barrel. A center gas spray gun is arranged in the inner barrel. A mixed gas outlet flow guide shrinkage cover is fixedly connected with the end of the outer barrel and sleeved with a smoke backflow cover. The smoke backflow cover can slide front and back along the axis of the outer barrel. A smoke backflow channel is arranged between the mixed gas outlet flow guide shrinkage cover and the smoke backflow cover. According to the scheme, smoke in a hearth can flow into a flame area of a combustor outlet through the smoke backflow channel, and therefore the oxygen concentration in mixed gas is diluted, the combustion time of fuel is prolonged, the combustion strength is lowered, high-temperature areas are avoided, and finally the aim of reducing NOx emission is achieved. By means of the structure, no circulating smoke pipeline or circulating fan needs to be additionally arranged, and therefore the investment cost is low.

Description

technical field [0001] The present application generally relates to a burner, in particular to a gas burner, and in particular to a flue gas internal circulation low-nitrogen burner. Background technique [0002] In recent years, my country's economy has grown rapidly, energy consumption has increased significantly, and the resulting environmental pollution has become increasingly severe. At present, my country's environmental protection department has higher and higher requirements for the emission limits of pollutants generated by combustion. For gas-fired boilers, NO x Emission standards have been raised to <100mg. For this reason, reducing the NO x Emissions are one of the main goals of today's gas burner designs. [0003] Currently, controlling gas burner NO x The main technical means of emission include air classification, the combination of air swirl and DC wind, gas classification and flue gas recirculation. Air classification and gas classification are limit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/62
Inventor 苏毅张世程揭涛刘思远
Owner SHANGHAI QIYAO THERMAL ENERGY ENG CO LTD
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