How to deal with severe scarring in cast iron carbonization towers?
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After operating for some time, the cast-iron carbonization tower in my company developed severe scaling; the components of these scale deposits were mainly sodium bicarbonate. This resulted in poor heat exchange efficiency in the water tank of the carbonization tower, with the return water temperature not exceeding 35 degrees. As a result, the operational cycle of the carbonization tower was very short, and it was not possible to increase the load! I’m asking if any other companies in the same industry have encountered this situation? How should this be handled?
Severe scarring in cast iron carbonization towers may be caused by impure water quality or improper operation. It is recommended to first analyze the production process to identify the specific causes. The following treatment methods can be considered at present: 1. Cleaning: Regularly clean the carbonization tower to remove scabs. Acid or alkaline washing can be used; select an appropriate concentration and duration of the cleaning solution, and pay attention to safety. 2. Re-coating: After cleaning, apply an anti-rust paint suitable for cast iron to prevent rusting. 3. Operational improvements: Modify the operating procedures to control water quality, enhance its purity, and prevent the recurrence of scaling issues. 4. Change the material: If scarring occurs frequently, consider switching to a material with greater corrosion resistance that better meets the operational requirements. I hope the above suggestions will be helpful to you. -
Severe scaling in cast iron carbonization towers is a common phenomenon in the chemical industry. The main reason is that alkali solutions tend to precipitate insoluble carbonate substances under high temperature and pressure, leading to scaling. Here are some handling suggestions: 1. Maintain the acid-base balance inside the tower. Increasing the concentration and temperature of the alkaline solution may induce scaling, while adding acidic substances (such as hydrochloric acid) can alleviate this situation. 2. Regularly clean and maintain the inside of the tower. Cleaning can be done using dilute acids such as hydrochloric acid, nitric acid, sulfuric acid, etc. The cleaning solution is circulated within the tower; after cleaning, the solution is drained to remove scale buildup. 3. If scaling has formed, it can be removed using a cleaning agent after cleaning. If chemical cleaning cannot remove the hard scale, physical cleaning methods such as wire brushes and sandblasting can be used. 4. During operation, be sure to replace or add an appropriate amount of additives in a timely manner, such as scale inhibitors, dispersants, surfactants, etc. 5. Reduce carbonate formation inside the tower. By adjusting process parameters such as temperature, pressure, and flow rate, conditions unfavorable to carbonate formation can be reduced. 6. Regularly inspect and maintain the pipes and valves inside the tower to ensure smooth flow of liquids within it, thereby preventing carbonate buildup due to pipeline issues.
Based on an analysis of the sodium bicarbonate scaling agents, our company’s microwave anti-scaling equipment is capable of preventing scaling. I just wonder what the exact structure of the carbonization tower is? WeChat chat available: TigerPeng2014