Is intercooling or direct cooling better for pre-cooling in desulfurization?
Thread Content
Is intercooling or direct cooling better for pre-cooling in desulfurization?
Using direct cooling is preferable, as it allows for the removal of impurities such as tar from the gas, thereby improving the desulfurization efficiency and the quality of the desulfurization solution, as well as enhancing the quality of sulfur
We use intercooling, and the results are pretty good
I think air conditioning might cause a lot of problems
Direct cooling can remove impurities such as tar and naphthalene from the gas, thereby improving the desulfurization efficiency; however, long operation times with indirect cooling increase the resistance of the gas
However, in the pre-cooling cycle, ammonia water comes into direct contact with gas; tar, naphthalene, and other substances present in the gas are washed away and remain suspended in the cooled ammonia water. When this ammonia water enters the spiral plate heat exchanger for cooling, impurities such as tar and naphthalene settle on the inner surface, worsening the heat transfer conditions and even leading to severe blockages. In the intercooling type, the horizontal-tube pre-cooling tower ensures that, when the temperature of the gas after primary cooling is ≤22°C, the impurities in the gas will not cause an increase in the resistance of the pre-cooling tower, thus ensuring an effective cooling effect. What do you all think?
Relatively speaking, I think direct cooling is better; it’s just the water treatment issue that needs to be considered. The main problems with indirect cooling are things like equipment blockage, and cleaning the equipment is also a challenging task.
We use direct cooling, which works quite well; it can remove impurities such as tar and nitrogen oxides from gas
We use a pre-cooler here for pre-cooling, and the results are very good. Condensate is sprayed along with chilled water.
Ours is also directly cooled; we have checked the nozzles twice.
Reply to floor 10: Adding an ultrasonic magnetic descaling device should yield better results.