Corrosion condition of the reforming and regeneration dryer
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How are the water cooling systems and liquid separation tanks of the reforming and regeneration dryer (Zhuhai Huaxin) performing? Corrosion thinning has occurred here as well; we have reached the remaining corrosion allowance. The pH value of the discharged water is around 4.
1. Strengthen the monitoring of dechlorination before using the drying packs, and replace the dechlorinating agent in the regenerated dechlorination tank in a timely manner. 2. Keep the drain valve at the bottom of the separation tank No. 2 slightly open to ensure that no water remains in the tank after drying, thereby reducing corrosion. 3. Apply coatings to the water coolers of the drying packs and to separation tank No. 2 to prevent corrosion
1. Should the steam heater use 1.0 MPa steam or 3.5 MPa steam? It is recommended to use high-pressure steam. 2. The steam heater is prone to leakage. In the event of a leak, condensate will enter the dryer, preventing proper drying and causing chlorine-induced corrosion. 3. Appropriately extend the regeneration time of the drying tower. 4. Check the insulation effectiveness of the regeneration tower and pipelines
Is the regenerated flue gas dechlorinated using alkaline scrubbing or a fixed-bed process?
A pH value of 4 in this area is quite normal; it is a location prone to corrosion, so considering upgrading the material of the water cooler and the water distribution tank might be a good idea
Switch to duplex steel, or use cast iron (which is cheaper) as it corrodes more slowly.
Could you tell us about the specific operating conditions? Let’s see if we can assist you
It’s the dechlorination tank in front of the regenerated dryer that has been punctured; chloride ions have reached the equipment behind it, causing corrosion
How about I provide you with a mounting plate or help you apply some accessories, so you can give it a try?
It is still necessary to monitor the effectiveness of the dechlorination agent used in the regeneration cycle, and replace it promptly if necessary.