The denitration SNCR wet desulphurization desulfurization denitration pump main factors of corrosion in the system

SNCR desulfurization denitration dust particles movement orbit integration devices have different force and gas flow, so as to achieve the purpose of purification. But the desulfurization denitration pump used for a long time, equipment corrosion would happen.

1, the work environment due to the complexity of desulfurization denitration integration equipment working environment, which may exist all sorts of corrosive substances. Especially in the variety of flue gas dust desulfurization in the process of purification, the sulfur dioxide gas under certain conditions the production of sulfuric acid, sulfuric acid has a strong corrosive. Especially for steel desulfurization denitration equipment will produce a certain corrosive, sulfate production.

2, residue

in desulfurization denitration integration of the purifying device may also remain part of particulate matter, and in the discharge of desulfurizer, also can cause corrosion to the spray layer lining device.

3, acidic acid will be the integration of desulfurization denitration equipment lining part causes serious corrosion.

SNCR wet desulfurization denitration in desulfurization denitration system pump main corrosion factors:

SNCR wet desulfurization denitration system within the working environment is very complex: solid, liquid and gas mixing blend, acid and alkali, alternating each other, solid and gas components in flue gas, flue gas velocity, temperature and pH value of slurry, the F - Cl - Objects and particles of scour and deposition many impact factors such as corrosion.

general power plant smoke contains SO2, NOx, HCl and HF gas, flue gas in the absorption tower and containing CaCO3, Ca ( 哦) A good contact with 2 substances such as absorbent, pollutants are absorbed in the serum, so as to realize the separation of flue gas, thus desulfurization detergents containing - H2SO4, HCl and HF acid and Cl - And suspended solid particles containing 15% ~ 20%. All these washing slurry will eventually pass recycling system to transport by desulfurization denitration circulating water pump.

due to the limestone slurry and contains a large number of F - gypsum slurry Cl - 、SO32- 、SO42- Plasma, and the desulfurization system in the cycle of washing water use, these ions in the slurry concentration, gradually worn on the corrosion of metal parts. Especially the Cl - , it is a metal pitting corrosion, crevice corrosion, stress corrosion, and the main reason for the selective corrosion, it accelerates the corrosion of metal parts in desulfurization sewage water pump damage.

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