Atmospheric combustion low-nitrogen wall-hanging stove

Abstract

The invention discloses an atmospheric combustion low-nitrogen wall-hanging furnace which is characterized by comprising a furnace body, the device comprises an exhaust fume collecting hood assembly, a heat exchanger, a heating water outlet pipe assembly, a heating water inlet pipe assembly, a water inlet valve assembly, a main controller, a segmented fuel gas proportional valve, a heating water return pipe fitting, a circulating water pump, a gas inlet pipe assembly, an atmospheric combustion low-nitrogen combustor, an up-draft direct-current fan and an ignition needle assembly. The up-draft direct-current fan is fixed in the exhaust fume collecting hood assembly, and the main controller is connected with the up-draft direct-current fan; the heat exchanger is installed below the exhaust fume collecting hood assembly, and water heated by the heat exchanger flows out through the heating water outlet pipe assembly. The ignition needle assembly is of a three-needle integrated structure, is installed on the outer side of the atmospheric combustion low-nitrogen combustor and has the ignition and flame feedback functions. The device is simple in structure, better in cost performance, easy to control and relatively low in technical requirement.

Description

technical field [0001] The invention relates to the technical field of wall-hung boilers, in particular to an atmospheric combustion low-nitrogen wall-hung boiler. Background technique [0002] There are three types of low-nitrogen wall-hung boilers: the first is to use water-cooled copper low-nitrogen combustion technology to achieve low NOx emissions, but the high cost of the burner leads to high cost of the whole machine and has no competitive advantage; The premixed burner controls the combustion air-fuel ratio, but it has high requirements for full premixed control technology, high requirements for gas source composition differences and high cost investment, and high demand for after-sales technical support; the third type is the water heater structure Thick-thin burner technology can achieve low NOx emissions, but its structure is quite different from European-style wall-hung boilers, its durability and stability are poor, and it is not easy to control, and it is rarel...

AI Technical Summary

Problems solved by technology

[0002] There are three types of low-nitrogen wall-hung boilers: the first is to use water-cooled copper low-nitrogen combustion technology to achieve low NOx emissions, but the high cost of the burner leads to high cost of the whole machine and does not have a competitive advantage; The premixed burner controls the combustion air-fuel ratio, but it has high requirements for full premixed control technology, high requirements for gas source composition differences and high cost investment, and high demand for after-sales technical support; the third type is the water heater structure Thick-thin burner technology can achieve low NOx emissions, but its structure is quite different from European-style wall-hung boilers, its durability and stability are poor, and it is difficult to control, and the current wall-hung boiler industry is also less used

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