Full premixed water-cooled low nitrogen condensing stainless steel hot water boiler

Abstract

The invention relates to a full premixed water-cooled low nitrogen condensing stainless steel hot water boiler, which comprises a water-cooled burner, an optical tube, a primary heat exchanger, a secondary condensation heat exchanger, a water chamber, a body frame, and a flue gas collector. The water-cooled burner, the optical tube, the primary heat exchanger, the secondary condensation heat exchanger, the water chamber, and the flue gas collector are all installed on the body frame, the optical tube, the water-cooled burner and heat exchange elements in the primary heat exchanger and the secondary condensation heat exchanger are all made of stainless steel, the space between the water-cooled burner and the primary heat exchanger forms a low-temperature furnace, the water-cooled burner, the optical tube, the primary heat exchanger and the secondary condensation heat exchanger successively communicate through the water chamber, the water-cooled burner, the low-temperature furnace, the primary heat exchanger, the secondary condensation heat exchanger and the flue gas collector are arranged from top to bottom, and cold water successively flows through the two-stage condensation heat exchanger, the primary heat exchanger, the low-temperature furnace and the water-cooled burner. According to the full premixed water-cooled low nitrogen condensing stainless steel hot water boiler, energy conservation and environment protection are achieved, NOx emission is less than 30 mg / m<3>, the floor space is small, safety and stability are high, and environmental adaptability strong.

Description

technical field [0001] This application relates to a fully premixed water-cooled combustion low-nitrogen condensing stainless steel hot water boiler, which is used in occasions that require hot water as an external heat exchange medium, such as heating and domestic hot water supply. Background technique [0002] Domestic common hot water boiler technology mainly has the following types: [0003] 1. The traditional smoke tube shell boiler is widely used, but the thermal efficiency is not high; the traditional gun burner is used, and the NOx emission is high; the boiler is large in size and occupies a large area; the boiler needs a thick insulation layer, and many manufacturers use Toxic insulation materials are not environmentally friendly; the tail heating surface is made of carbon steel or ND steel, which has poor corrosion resistance. [0004] 2. Compared with traditional boilers, cast aluminum condensing hot water boilers use metal fiber surface burners, which have low N...

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Problems solved by technology

[0003] 1. The traditional smoke tube shell boiler is widely used, but the thermal efficiency is not high; the traditional gun burner is used, and the NOx emission is high; the boiler is large in size and occupies a large area; the boiler needs a thick insulation layer, and many manufacturers use Toxic insulation materials are not environmentally friendly; the tail heating surface is made of carbon steel or ND steel, which has poor corrosion resistance

[0004] 2. Compared with traditional boilers, cast aluminum condensing hot water boilers use metal fiber surface burners, which have low NOx emissions and high boiler thermal efficiency; however, the flame stability is poor and it is easy to temper; at the same time, the environmental adaptability is poor, and air or Impurities in the gas can easily block the fiber holes on the surface, which needs to be manually cleaned regularly, otherwise it is easy to burn out the combustion head; the main material of the boiler body is cast aluminum, and due to the limitations of domestic manufacturing processes, the defect rate of cast aluminum itself is high; The protruding structure in the channel is easily damaged; when the water quality is poor, the channel is easily blocked

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