What are the sources of waste gas pollution in the production and processing of profiles in industrial aluminum alloy?

Waste gas generated by thermal equipment: aluminum melting furnace, casting furnace, homogenizing furnace, aluminum bar heating furnace, mold heating furnace, aging furnace, drying furnace, curing furnace, etc. When these thermal devices are heated by fuels (such as coal, oil and natural gas), they will all produce combustion exhaust gas. The fuel used is different, so the exhaust gas is different. From the point of view of clean energy, gas fuel is obviously superior to liquid fuel and solid fuel. The enterprise changed the heating mode of the hot stove from traditional coal and oil to gas and electricity, which reduced the cost of waste gas treatment and the influence of coal and oil residue on product quality. Acid mist exhaust gas and alkali mist exhaust gas. In the production of oxidation coloring, NaOH lye is used in the alkali washing tank. When heated, alkali mist will be emitted, and sulfuric acid solution is used in the anodic oxidation tank, which volatilizes to form sulfuric acid mist. Therefore, each alkali washing tank and anodic oxidation tank is equipped with tank side exhaust system. After centralized collection, the acid mist exhaust gas and alkali mist exhaust gas respectively pass through the acid mist purification device and the alkali mist purification device. The acid mist meets the absorbent sprayed from bottom to top in the tower in the packing layer, so that the acid and alkali are absorbed and become acid-base wastewater, which is discharged from the bottom of the tower and sent to the oxidation wastewater station for treatment.

Spraying exhaust gas: When powder spraying, some powder coatings can't be adsorbed on the surface of profiles and are discharged with the wind, forming dusty exhaust gas. In this regard, enterprises generally adopt "cyclone recovery system+filter" treatment device to recover paint dust, which can not only ensure that the exhaust gas reaches the standard, but also recover the powder paint in the exhaust gas for reuse.

Coating waste gas: As organic solvents (toluene and xylene) are used for paint mixing during fluorocarbon paint spraying, these solvents will volatilize during spraying and pollute the surrounding environment of the workshop. In the workshop, exhaust devices are often installed in the spray booth and leveling room to pump volatile organic solvents to the exhaust gas treatment device for treatment. At present, the main treatment methods are activated carbon adsorption and catalytic combustion, with mature equipment and technology, stable operation and good effect. Adsorption can make organic matter. The waste gas treatment equipment can refer to what are the waste gas pollution sources of industrial aluminum alloy profiles?