Selection of steam generators (waste boilers) in process units
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In process units, steam generators (waste boilers) can be either kettle-type heat exchangers or shell-and-tube heat exchangers combined with a drum. How is the choice made? Are there any principles or standards?
Both of these methods are available in the devices I am familiar with. Based on my understanding of the actual production process, I believe there are two key points: one is to monitor the temperature of the heat medium; assuming that in a dry cooking scenario the heat exchange tubes will not reach their allowable operating temperature, in such cases the so-called \"vessel-type\" approach is sufficient. Secondly, under the condition that operation is not allowed when the pot is dry, it is necessary to consider the buffering time after water is interrupted and supplied. Under such circumstances, the so-called \"kettle-type\" approach may result in a large diameter for the heat exchanger, while with the drum-type approach, the design of the drum size is more flexible when the heat exchanger has a smaller diameter.