Smelting rotary furnace waste heat boiler

Working principle

In response to the production process of metallurgical furnaces and the working characteristics of waste heat boilers, our company has collaborated with a design institute to develop a straight through full membrane water-cooled wall smelting rotary furnace waste heat boiler, which adopts three water circulation methods: natural circulation, forced circulation, and a combination of the two. The inlet of the waste heat boiler is connected to the water-cooled hood at the outlet of the smelting converter, and a flexible expansion joint is installed. The high-temperature flue gas discharged from the converter enters the waste heat boiler, passes through the radiation cooling chamber, slag condensation tube screen, and array convection tube bundle in sequence, and is discharged outside the furnace at a flue gas temperature 30 ℃~60 ℃ higher than the acid dew point. It enters the dust removal system for dust removal and purification, and then enters the next process for recycling.

Adopting a straight through full membrane water-cooled wall integral suspension structure with low flow rate design, the boiler ash hopper is also covered by a water-cooled wall and forms an inclination angle to facilitate smoke and dust emissions. The boiler adopts mechanical vibration, using a soot blower for ash cleaning, or a combination of vibration and soot blowing for three types of ash cleaning methods. This boiler effectively solves the problems of ash accumulation, expansion, sealing, corrosion, and wear of waste heat boilers in bundled smelting rotary furnaces, reaching the advanced level in China.

Performance characteristics

According to the characteristics of the production process in smelters, most metallurgical furnaces emit high levels of SO2 and smoke dust, with large fluctuations in smoke volume and high smoke temperature. In addition, the smoke dust contains highly adhesive metals. To prevent dust accumulation, a straight through waste heat boiler is often used.

The waste heat boiler of the smelting rotary furnace can not only recover secondary energy from the high-temperature flue gas of the smelting plant, reduce the temperature of the flue gas, but more importantly, collect smoke and dust from the high-temperature flue gas, recover precious metals, reduce the dust content of the flue gas, ensure the smoothness of the process system, and create favorable conditions for the tail process.

A smelting rotary furnace waste heat boiler is a boiler that uses gases, exhaust gases, waste liquids, and heat from certain power machinery exhausts during the smelting process of non-ferrous metals to produce steam or hot water. The smelting rotary furnace waste heat boiler is an important energy-saving equipment. There are various types of non-ferrous metallurgical furnaces with different uses, most of which are high-temperature equipment. The waste heat resources are very abundant. Installing the smelting rotary furnace waste heat boiler to absorb some of the heat in the exhaust gas can significantly improve the thermal energy utilization rate of the entire system.

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