Domestic fuel gas boiler of the average thermal efficiency of about 87%, about 10% of the heat energy through the boiler flue gas to escape to atmosphere, high exhaust temperature of 180DEG C to 250 degrees C, not only a large number of wasted energy, but also caused serious environmental pollution.

Normal gas boilers, each produced1 tons of steam, about the need to consume more than 80Nm3 natural gas, produced1300Nm3 flue gas, including 15% ~ 19% water vapor, this part of the water vapor in the superheated state, may not be in the high temperature flue gas condenses into liquid water release of latent heat of vaporization. Flue gas in this part of heat quantity is huge, up to more than 5.6kcal, accounting for natural gas low calorific capacity of around 6%, waste is very surprising.

Recovery boiler flue gas waste heat boiler is the important way for energy saving, gas calorific value is very large, only the latent heat of vaporization of the water vapor to the boiler water supply to 100 degrees above, not only can be used for boiler water, excess water can also be used to heat domestic hot water.

Fuel, gas boiler exhaust gas heat loss of about8% ~16%, the heat-losing of around 1%, the furnace body cooling of 1~ 2%, incomplete combustion1%, effective use of heat in about 80% ~91%, flue gas includes the N2accounted for 68%, Co2 11%, H2O 16%, O2 4%, SO22PPM, NOx80PPM. If the exhaust temperature of200 degrees, with the high Xiaoquan heat recovery heat exchanger, flue gas temperature can be decreased below 70C ( even down to 45degrees C), can be20 degrees of the boiler is increased to 85degrees C, saves energy, at the same time, the oil and gas ( especially natural gas sulfur rarely, flue gas SO2 content is low, the vast majority of dissolved into the flue gas condensation water discharged, and the flue gas waste heat recovery device are made of stainless steel material, ensure the device reliability corrosion resistance, therefore the service life of the utility model is in 5 ~6 years.

Total heat recovery heat exchanger made of stainless steel sheet, can be a single use, can also be based on the need for multiple parallel installed in a shell body, heat exchanger is provided with a water inlet, discharge outlet is arranged below the condensation of water, at the same time can be disassembled for cleaning. High temperature flue gas through a heat exchanger, heating boiler, the flue gas delay temperature drops to below dew point temperature, the maximum absorption of flue gas in the heat, while the absorption of water vapor in the flue gases is condensed into water release of large amounts of latent heat and the completion of total heat recovery steam condensing process, total heat recovery process belongs to the phase change heat transfer process extremely high strength, heat transfer.