Several problems to be paid attention to in the construction of desulfurization process

To carry out anti-corrosion treatment on the original chimney and horizontal flue. Our company has successfully designed a magnesia desulfurization project combining chimney and desulfurization tower.

3. Anticorrosion of magnesium oxide desulfurization tower

Anti-corrosion is an important part of desulfurization. The quality of anti-corrosion of the desulfurization tower directly affects the safe operation and desulfurization efficiency of the desulfurization system. Taking the current general anti-corrosion of FRP flakes, the steps that must be paid attention to during construction are as follows:

1) Grinding of the weld. The grinding of the welding joint directly affects the sticking of the scales. The thickness of the wall plate must not exceed 2mm, and the welding seam and the tower wall must be excessively slow arc.

2) Sandblasting. Many construction teams do not pay much attention to the sandblasting process. It is often the failure of this process that causes the glass flakes to fall off in a large area, causing the entire desulfurization tower to corrode. Sandblasting must use quartz sand, and the particle size is about 2mm. If there is no quartz sand to use yellow sand, you need to fry sand. The siding after sandblasting has a metallic luster, and the imprint of the sand does not exceed 1.5mm.

Synthetic sintered magnesia calcium sand

4. Magnesium-aluminum spinel installation of mist eliminator

The installation quality of the mist eliminator directly affects the emission quality of the flue gas. The mist eliminator not only removes the moisture and impurities in the flue gas, but also directly affects the sulfur removal efficiency.

The quantity and uniformity of the flushing water are very critical. The amount of flushing water is small. The impurities contained in the mist eliminator hang on the mist eliminator, which affects the efficiency of the mist eliminator. Seriously, it can block the mist eliminator and cause the pressure in the tower to be too high. The flue gas temperature is too high, the desulfurization efficiency is reduced, and even the mist eliminator is damaged; the uneven flushing water will also cause the above problems, so it is required that the mist eliminator must be equipped with a flushing water system.

The installation height (thickness) of the mist eliminator should be moderate, too high and too long will cause the flue gas outlet temperature to be low and the pressure in the tower to be high; too short (thin), the demisting effect is poor, the outlet pressure is high, and the flue gas The temperature is high.

5. Summary

In the construction of the magnesium oxide desulfurization process, it is necessary to combine the actual use and on-site conditions, and give more consideration to not only meet the design requirements, but also ensure safe and convenient operation, and improve the actual use efficiency.