Completely premixed gas burners

Abstract

The invention discloses a fully premixed fuel gas burner which comprises a sealing plate. The fully premixed fuel gas burner further comprises a mixing cylinder, a fuel gas and air distribution cylinder and a fire hole cylinder which are sequentially arranged in a sleeved and spaced mode from the inner to the outer. The space between the mixing cylindrical and the fuel gas and air distribution cylinder forms a distribution chamber, the space between the fuel gas and air distribution cylinder and the fire hole cylinder forms a thermal insulation chamber, a plurality of ignition chambers are arranged in the mixing cylindrical by penetrating the mixing cylindrical, a plurality of distribution holes are formed in the fuel gas and air distribution cylinder, a plurality of fire holes are formed in the fire hole cylinder, the sealing plate is connected with an air intake pipe, a fuel gas inlet pipe penetrates the wall surface of the air intake pipe to be communicated with an air inlet on a fuel gas distribution chamber which is arranged in an air outlet of the air intake pipe, and a plurality of gas outlets communicated with fuel gas nozzles which are arranged in correspondence with the ignition chambers are arranged on the fuel gas distribution chamber. According to the fully premixed fuel gas burner, the emission load of pollutants in flue gas is low, and the proportion of fuel gas and air can be controlled easily.

Description

Technical field [0001] The invention relates to a gas burner with low pollutant emission, in particular to a compact cylindrical complete premixed gas burner with low nitrogen oxides based on a premixed combustion method. Background technique [0002] China's economy is in a critical period of transition. In order to further reduce the environmental problems caused by the consumption of primary energy (especially coal and oil) in people's production and life, the government is actively encouraging the application of natural gas. Burner is a general term for devices that make fuel and air spray mixed (or mixed spray) and burn in a certain way. Burners are divided into industrial burners, burners, civilian burners, and special burners according to their types and application fields. . The burners of existing domestic gas water heaters and heating water heaters generally adopt partial premixed combustion design in developing countries, and most developed countries adopt full premix...

AI Technical Summary

Problems solved by technology

As far as the partial premixed combustion method is concerned, there are some shortcomings as follows: firstly, the gas is only mixed with part of the air before combustion, and secondary air is required to supplement the combustion, so the combustion is incomplete; secondly, the air coefficient is relatively large (generally close to or even exceeds 2), and the combustion The flame temperature is lower, and more CO and NO are produced due to incomplete combustion x and other harmful gases, which do not meet the requirements of environmental protection

This makes the heating device using this kind of burner need to configure a special mixer for the burner, so that the volume of the burner increases, the geometric volume occupied by the gas and air mixture increases, and the safety is poor.

Foreign EP1083386A1 discloses a cylindrical burner with a mixing device. The device is provided with two fans and two gas pipes. The gas pipe is arranged at the outlet of each fan. The outlets of the two fans are connected. The mixture all enters the interior of the cylindrical burner, and the gas and air mixture is sprayed out through the fire holes on the stainless steel cylinder to achieve premixed combustion, but the cylindrical burner relies on the turbulence generated by the airflow impact of the fan to achieve gas and air. Air mixing, large airflow resistance, high fan energy consumption, high noise, increased geometric volume occupied by the mixture of gas and air, and poor safety

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