Low nitrogen oxide burner of fuel gas heating water heater

Abstract

The invention discloses a low nitrogen oxide burner of a fuel gas heating water heater. When the low nitrogen oxide burner is applied, fuel gas and air mixed gas directly rushes upwards through a fuel gas mixing inlet injection pipe; when the fuel gas and air mixed gas collides a fuel gas guide concave bag, due to blocking of the fuel gas guide concave bag, a part of fuel gas and air mixed gas flows to the two sides, the other part of fuel gas and air mixed gas is directly upwards to enter a mixed gas groove, part of fuel gas and air mixed gas is straightly upwards to burn at the top of a fire dividing hole, the other small part of fuel gas and air mixed gas is blocked by a fire receiving hole separating plate to generate positive pressure, and under the influence of the positive pressure, part of gas enter an outer side fuel gas mixing gas dividing groove from a transverse fuel gas and air mixing air flow outlet hole and burns in an outer side burning hole; and the top of a burner shell cover is provided with a plurality of flame burning holes through a plurality of transverse plates in a mesh dividing manner, and the fire power of fire behaviors generated by burning is strong; meanwhile, the flame area is greatly increased, and burning is more sufficient.

Description

[0001] Technical field: [0002] The invention relates to a burner for a gas heating water heater, in particular to a low nitrogen oxide burner for a gas heating water heater. Background technique [0003] As the country continues to strengthen environmental protection, there will be new standards for flue gas emissions from gas appliances, especially for NOx emissions. Now gas appliances entering Europe and the United States must have low NOx requirements. The NOx emission requirements for gas appliances also began in 2012; the existing burners for ordinary wall-hung boilers will produce a large amount of NOx during combustion, which will pollute the environment, and even cause acid rain and endanger the human respiratory system. In the prior art, under the condition of negative pressure, there is a burner with low nitrogen oxides using rich-lean technology. This type of burner includes an injection pipe and a head distributor. The gas inlet at one end of the injection pipe i...

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Problems solved by technology

[0003] As the country continues to strengthen environmental protection, there will be new standards for flue gas emissions from gas appliances, especially for NOx emissions. Now gas appliances entering Europe and the United States must have low NOx requirements. The NOx emission requirements for gas appliances also began in 2012; the existing burners for ordinary wall-hung boilers will produce a large amount of NOx during combustion, which will pollute the environment, and even cause acid rain and endanger the human respiratory system. In the prior art, under the condition of negative pressure, there is a burner with low nitrogen oxides using rich-lean technology. This type of burner includes an injection pipe and a head distributor. The gas inlet at one end of the injection pipe is connected to the gas nozzle. The gas inlet is surrounded by the introduction part of the primary air port, and the other end of the ejector tube communicates with the head distributor inlet of the head distributor. Two kinds of flames can appear above the burner, and the light flame can help the thick flame to carry out the first Secondary combustion can reduce the emission of nitrogen oxides, but the structure of the burner is relatively complicated, and the ratio of rich gas to light gas is difficult to adjust. There is also a burner that uses water-cooled combustion technology and low nitrogen oxides. The burner adopts the technology of two ejector tubes to increase the primary air, and the combustion fire hole adopts the method of row holes. The burner body is made of copper or aluminum with high thermal conductivity. The burner body is connected with a cold water pipe to reduce combustion The temperature of the device body and the temperature of the mixed gas can achieve the purpose of reducing nitrogen oxides, but it uses more expensive metals such as copper, which has high cost, large volume, and relatively complicated manufacturing. The burner flame hole of the hole, the combustion stability is poor

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