The steam boiler was damaged after half a year of use
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This post was last edited by sunjl1981 on 2013-1-6 at 20:04. Our plant uses a 120t/d synthesis furnace manufactured by Planet Graphite, which generates steam at 0.3MPa as a by-product. After half a year of operation, impurities accumulated on the water side of the furnace caused poor heat exchange, leading to overheating and damage to the graphite components. We hope everyone can share their valuable experience; it would be especially helpful if diagrams of their own process designs could be provided, so that we can learn from the improvements made by different design firms and manufacturers. Thank you very much. Note♀ ) # ♀ , 。
Thank you to the original poster for sharing; I think such shares should be marked as highlights
1. In addition to being a synthesis furnace, another important aspect of the two-in-one steam and hydrochloric acid generating furnace that cannot be overlooked is that it is also a steam furnace； 2. The principle of the by-product steam generator is to use the heat from synthetic reactions to convert deionized water into steam. If no measures are taken, scaling is likely to occur during the evaporation process, and it is possible for the situation mentioned by the original poster to arise ； 3. Those familiar with thermal engineering know that demineralized water must be treated with ammonia before being fed into the furnace, in order to prevent corrosion and scaling. Therefore, to completely eliminate this risk, proper water treatment is necessary ； 4. Before any water treatment is carried out, several things are essential: ensuring the appropriate hardness of the water entering the furnace, replacing the water on a regular basis, and inspecting the graphite blocks during maintenance to prevent damage to those areas where high temperatures occur ；
Regular water is very poor in quality; we have now switched to soft water, which is water that has been treated through secondary reverse osmosis and mixed-bed filtration.
It is best to use pure water in steam boilers; although it increases costs, it helps to prevent scaling inside the boiler jacket!
Our factory uses soft water now, and I think it’s necessary to drain the water regularly at least!
For the circulating cooling water in synthesis furnaces, soft water is preferred; if possible, pure water is even better. Our company uses pure water for cooling, and the results are excellent.
Reply to 1# cvcvlxw: Currently, the jacket cooling water in the two-in-one graphite synthesis furnace is generally treated with desalinated water, so scaling is not a major issue. In the situation you described, could it be that the internal pores of the graphite modules are blocked, preventing heat from being conducted? The possible causes of blockage in the inner hole of the graphite module are: processing defects in the graphite module, and non-conduction of the inner hole ； Foreign objects enter the inner holes during the transportation and installation of the equipment. I wonder if the original poster has seen the mechanism after the graphite furnace was damaged? Looking forward to the results.
We use pure water; however, the recycled water we used before was very dirty – it was only discharged but not completely removed. I’m not sure if such problems will arise, as we have just started using this system