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Boiler flue gas waste heat recovery heat exchanger makes your boiler more energy-saving!

2020-10-29 10:55:32
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The utility model relates to a boiler waste heat recovery device, which comprises a boiler 1, a water outlet pipe 2, a water return pipe 3, valves 4, 7, 8, a coil 5, a flue 6, and a makeup water pipe 9. The utility model adopts a coil set in the flue, and the boiler feed water temperature increases, with which the boiler thermal efficiency and thermal efficiency can increase by about 10%, and fuel can be saved by about 12%, thereby achieving the purpose of energy conservation, It has a broad application prospect, making full use of the limited energy, and has important practical significance for reducing costs

because Flue gas waste heat boiler The energy consumption is large, and the waste heat recovery heat exchanger of the boiler is required to carry out energy-saving transformation. The heat loss of oil and gas boiler exhaust is about 8%~16%, the heat loss of blowdown is about 1%, the heat loss of furnace body is 1~2%, the incomplete combustion is 1%, and the effective heat utilization rate is about 80%~91%. Nitrogen in flue gas accounts for 68%, co2 11%, h2o 16%, o2 4%, so 22ppm, nox 80ppm. When the flue gas temperature is 200 ℃, the flue gas temperature can be reduced to below 70 ℃ (even below 45 ℃) through the total heat recovery heat exchanger, and the boiler make-up water can be increased to 85 ℃ at 20 ℃, saving a lot of energy. At the same time, due to the low sulfur content of oil and gas (especially natural gas), the SO2 content in the flue gas is very low, and most of them are dissolved in the flue gas condensate for emission. The flue gas waste heat recovery device is made of stainless steel to ensure the reliable corrosion resistance of the device, so the service life of the entire device is more than 5-6 years.

Flue gas waste heat boiler Integral rolled aluminum fin tube waste heat recovery device The integral rolled aluminum fin tube waste heat recovery device consists of carbon steel pipe and frame (stainless steel optional) integral rolled aluminum fin tube, which can be used as a single set or installed in parallel in the shell as required. The waste heat recovery device is equipped with an inlet and outlet, and a condensate discharge outlet is set below the inlet and outlet, which can be disassembled and cleaned at the same time. After the high-temperature flue gas passes through the waste heat recovery device, the heat exchanger will heat the boiler to make up water or secondary return water, reduce the flue gas temperature below the dew point temperature, and absorb the sensible heat in the flue gas to a large extent. And absorb a large amount of latent heat released by water vapor in the flue gas to condense into water to complete the waste heat recovery process. The recovery process of steam condensation waste heat belongs to phase change heat transfer process with high heat transfer intensity.

 Flue gas waste heat boiler


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