Discussion on purification processes
Thread Content
This post was last edited by hnfxl689 on 2015-9-24 at 16:11. The conventional purification process typically uses a primary high-efficiency scrubber + cooling tower + electrostatic demister (with options such as power wave, venturi, and empty tower types for the scrubber). The existing design scheme for the acid production and purification process is as follows: roasting furnace + cyclone + electrostatic precipitator + “empty tower + power wave + cooling tower + electrostatic demister”. Regarding this process design scheme, share your thoughts on it. The outlet temperature of the empty tower is controlled at around 120 degrees. The exit temperature of the power wave is around 75 degrees. What are the advantages of this purification design? Sulfuric Acid Experience Exchange Group
This process flow is relatively reliable, with good control over parameters. However, the dynamic wave resistance is high, making it unsuitable for this process flow.
Ours consists of a “roasting furnace + cyclone + electrostatic precipitator” plus “power wave + cooling tower + power wave + electrostatic demister”; this is for reference only.
This configuration is highly beneficial for the recycling of acid waste, as it helps to save energy and reduce consumption, thereby lowering operating costs; it is also advantageous for reducing the overall energy consumption of the system. I support this configuration.
President Pei is very experienced; please give me your guidance!
By the way, friends upstairs, what was the original intention behind someone using two-stage power waves? Is it because the source of raw materials is complex and the impurity levels are high, making the purification process difficult to carry out? After all, everyone knows that power waves consume a significant amount of energy, and as system components, the more devices there are, the more likely leakage points will arise, which is not good news for those responsible for production!
This post was last edited by Feiyu Yu Fei birds on 2015-9-30 at 15:51. When the outlet temperature of the empty tower is kept around 120 degrees, the cooling effect of the tower seems to be poor; could it be that water is not being sprayed in certain areas?； The outlet angle of the power wave is set at 75 degrees; for mineral acids with low water content, the effectiveness of the power wave is also poor ； If it’s the process design value, then the design is wrong!
In conventional design, the difference between the acid inlet temperature in the empty tower and the gas outlet temperature should not exceed 5°C. If the gas outlet temperature is 120°C, the acid separation efficiency will be very poor, or there will be no circulating acid in the empty tower (assuming a low acid concentration); in such a case, the empty tower functions as a humidifying tower； The temperature at the exit of the empty tower for the slurry feed should not be that high either; the temperature of the acid entering the tower is around 80°C, and the exit temperature should not exceed 90°C℃ ； The material we design contains 60% water, so the acid temperature in the tower is around 82°C.
I would like to ask: is it possible to move the empty tower behind the power wave?