Operation method of enamel reaction kettle
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I think everyone knows the precautions that should be taken when operating enamel reaction kettles, and the manufacturers also provide guidelines for proper operation. But in actual production, how many people do actually follow various regulations and operate in accordance with the procedures? For example, when replacing the tetrafluorosilicate asbestos gasket on the top flange, if the gasket is not level, clamps are used to tighten it, without any concern over whether this might cause deformation of the reactor flange and lead to stress concentration. Once production begins and the temperature rises, water hammer effects continue to act on the water side of the jacket; within a year, scaling occurs on the enamel inside the reactor. The issues related to the operation, installation, and maintenance of enamel-lined reaction vessels should be considered in a comprehensive manner, weighing the advantages and disadvantages from both the equipment and process perspectives. It is necessary to meet the process requirements while also ensuring the safety of the equipment. How long does it generally take to repair cracks in an enamel-lined reaction vessel? There are various opinions, and no consensus has been reached. Many attribute the problem to the poor quality of domestic manufacturing; yet regardless of how low the quality may be, just as with domestic cars, as long as they are properly maintained and used scientifically, they shouldn’t break down within a year. I’m just trying to stimulate discussion; I hope that heroes and adventurers from all over will come and share their opinions. After all, it’s about posting comments, and the more correct opinions we have, the faster we can grow.
1. Add more pipelines; following the required procedures can help prevent water hammer. 2. Pay close attention during the production process and check the tanks regularly. Some of my tanks with capacities of 6300L, 10000L, and 12500L have been in use for over 5 years yet are still in good condition； Why do you say it can only be used for one year? No checks are done usually? It’s cracked – should I keep using it? When the corrosion becomes severe, well, is the quality of this canister poor? If production is carried out in this way, it means turning small workshops into larger ones; at bottom they remain workshops. Where would the enterprises get their profits, let alone any competitiveness?
Thank you for your advice. Adding more pipelines means separating the heating steam from the cooling water, right?
Since the expansion coefficients of the ceramic layer and the steel plate are different, special attention must be paid to the temperature fluctuations caused by heat and cold in the jacket and inside the tank. The heat shock should be less than 120°C, and the cold shock less than 110°C. If the temperature difference is too large, the different rates of expansion/contraction between the ceramic layer and the steel plate will inevitably lead to cracking or damage of the ceramic layer. It is strictly forbidden to scratch the surface of ceramic-lined equipment. In actual use, many users add materials directly through the manhole during production, or they fail to pay attention to foreign objects on their shoe soles or tools they carry, which can easily scratch the surface of the ceramic layer. This will undermine the corrosion resistance of the ceramic layer. Ceramic layers are very fragile, and strong impacts must be avoided. Sometimes, although no visible damage to the ceramic layer appears on the surface after an impact, stress is still generated in the steel plate substrate; subsequent heating and cooling operations may then cause cracks or damage to that area. Furthermore, strictly control the pressure inside the reactor and the jacket, and overpressure is strictly prohibited. In fact, once there are problems with the porcelain layer, it is easy to determine the cause of porcelain chipping by examining the condition of its peeling.
Yes, the most important factors are operational control, temperature rise management, and regular maintenance – only by doing so can we ensure that the equipment reaches its designed lifespan and reduce costs.
There are indeed many considerations involved in the installation and use of glass-lined equipment, such as the rate of temperature rise and the management of the medium used in the jacket. Standardized management when using different media......There are also many aspects related to the user’s manufacturing process; in some cases, the user needs to provide the enamel factory with basic information about the process in order to optimize the structural design.
Due to the significant difference in linear expansion coefficients between the enamel layer and the metal substrate, glass-lined equipment is particularly vulnerable to sudden changes in temperature. Operating procedures should be established to prevent such sudden temperature changes. Additionally, since the enamel layer is a brittle material with poor tensile strength, it is essential to avoid excessive pressure, as this is also a major cause of enamel failure.