Gas-fired boiler flue gas reflux internal and external double-circulation low-nitrogen burner and gas boiler
A low-nitrogen burner and gas-fired boiler technology, which is applied to gas fuel burners, burners, combustion methods, etc., can solve the problems of unsatisfactory reduction effect of nitrogen oxide emission concentration, complex structure, and large burner size.
Pending Publication Date: 2019-02-15
北京基鼎环保科技有限公司
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Problems solved by technology
Although some burners currently use a variety of low-nitrogen combustion technologies, this will cause problems such as larger burners, more complex structures, difficult adjustments, and unstable combustion, and the effect of reducing the concentration of nitrogen oxides is not very good. ideal
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[0044] The present invention will be described in detail below with reference to the accompanying drawings and examples. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, those skilled in the art will recognize that modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. Therefore, it is intended that the present invention includes such modifications and variations as come within the scope of the appended claims and their equivalents.
[0045] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientations or positional relationships indicated by "top", "bottom", etc. are based on the orienta...
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The invention provides a gas-fired boiler flue gas reflux internal and external double-circulation low-nitrogen burner and a gas boiler. The burner comprises a burner body; a nozzle assembly is arranged on the burner body; a main air pipe of the burner body is sleeved with an air pipe; and a cyclone is arranged between the main air pipe and the air pipe. The cyclone can be used for spraying air out for combustion in a swirling mode, and through the swirling mode, an internal combustion mode is formed in a hearth of the gas-fired boiler. The gas-fired boiler is provided with a flue gas circulation pipe, and thus flue gas external circulation is achieved. The various technologies such as flue gas internal and external circulation, rotary jetting, cross jetting and bell-mouth type flame-stabilizing device are adopted, the purpose of low-temperature combustion, stable combustion and improvement of temperature uniformity in the hearth are achieved, nitric oxide generation and emission are maximally suppressed and reduced, the flue gas circulation rate can be up to 20-40%, and the hearth outlet nitric oxide concentration is lower than 30 mg / m<3>.
Description
technical field [0001] The invention relates to the technical field of combustion equipment, and more specifically relates to a low-nitrogen burner for gas boiler flue gas backflow internal and external double circulation and a gas boiler. Background technique [0002] In today's increasingly serious environment, energy, and economic conflicts, energy conservation and emission reduction work in all walks of life is imminent. Under the pressure of energy saving and emission reduction, the fuel used by boilers has been changed from traditional coal and fuel oil to natural gas, which has increased the number of users of natural gas boilers. [0003] Although natural gas has the advantages of low sulfur compounds and low dust emissions as a fuel, it still produces a large amount of nitrogen oxides (NO X ), nitrogen oxides are still one of the main pollutants in the combustion products that cause environmental pollution. [0004] According to the testing data on the operation o...
Claims
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Login to View More IPC IPC(8): F23D14/02F23D14/46F23D14/48
CPCF23D14/02F23D14/46F23D14/48
Inventor 何建军陆全华王春华
Owner 北京基鼎环保科技有限公司