Yingkou Hexiang Refractories Co., Ltd.
Address: Gaozhuang Village, Nanlou Development Zone, Dashiqiao City
Gneral Manager: Zou Xiang
Mobile phone: 18041718881
Mobile phone: 15141715888
Mobile phone: 18641774666
O → Mg(HSO
Magnesium oxide is used for desulfurization. Magnesium oxide desulfurization and magnesium oxide desulfurization are used for desulfurization. The boiler flue gas is fed into the pre-cooling section of the absorption tower by the induced draft fan, cooled to a suitable temperature and then into the absorption tower. It reacts with the absorption slurry under the reverse flow to remove the sulfur in the flue gas. A mist eliminator is installed on the top of the absorption tower to remove small droplets carried in the clean flue gas. The net smoke is discharged into the chimney after it is reduced by a mist eliminator. Dust and dirt are attached to the demister, resulting in blockage of mist eliminator and increase of system pressure loss. It is necessary to wash water pumps with mist eliminator to provide industrial water for spray cleaning of mist eliminator. The main reactions in the absorption process are as follows: Mg (OH) 2 + SO2 MgSO3 + H2O MgSO3 + SO2 + H2O Mg (HSO 3) 2 Mg (HSO 3) 2 + Mg (OH) 2 2MgSO3 + 2H 2, which absorbs sulfur and falls to the bottom of the absorption tower. The bottom of the absorption tower is mainly oxidation and circulation process. During the oxidation process, a large amount of compressed air is forced to be supplied to the slurry at the bottom of the tower by an aeration blower, which causes the oxidation of MgSO3 to MgSO4. In this stage, the chemical reactions are as follows: MgSO3 + 1/2O2 MgSO4 Mg (HSO 3) 2 + 1/2O2 MgSO4 + H2SO3 + Mg (OH) 2 MgSO3 + 2H2O MgSO3 + 1/2O2 MgSO4 circulation process is that the absorbent liquid falling into the bottom of the tower is re-transported to the upper absorption zone of the absorber through slurry circulation pump. The pH of the absorbent liquid at the bottom of the tower is adjusted by 20% magnesium hydroxide slurry injected automatically, and controlled in chain with the acid-base meter. When the bottom slurry pH is lower than the set value, magnesium hydroxide slurry is automatically added to the bottom of the absorption tower through the conveying pump. Under the action of the bottom agitator, the slurry is evenly mixed, and the magnesium hydroxide slurry is stopped when the pH reaches the set value. 20% magnesium hydroxide solution is produced by heating water with magnesium oxide powder or directly using magnesium hydroxide. Because of the impurity of magnesium oxide powder and the low solubility of magnesium hydroxide, the slurry after maturation is very easy to deposit. Therefore, the mixer and the magnesium hydroxide solution pump must run continuously to avoid precipitation at the bottom of the pipeline and absorption tower.