Seek methods for maintaining graphite heat exchangers
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One of the tubular graphite heat exchangers in the workshop is clogged. We plan to take it apart and clean it, but we’ve heard that it’s easy to remove but difficult to reassemble. So I’d like to ask those of you who have experience or relevant information in this area for your advice.
If I clean it myself, I guess a few pipes will get damaged
Clean all spare parts, trim the relevant sealing surfaces, and prepare the resin for bonding, etc； The pre-installed equipment is placed on a horizontal assembly rack; several graphite tubes are pre-installed on the ground using fake paneling and baffle plates as a basis, and the baffle plates are positioned accordingly ； Baffle placement: The pre-assembled components are loaded into the steel casing using a crane (or manually for smaller units), and all graphite tubes are installed one by one ； Overall pre-assembly: Install the upper and lower end caps and secure them in place with bolts; check whether all relevant parameters are within the specified ranges, and make proper alignment marks in a timely manner ； Gluing: Remove the compression bolts, take off the tube sheets at both ends, and apply glue to the corresponding glued tube sheets (including graphite tubes) one by one in accordance with the gluing procedure ； Fixed-end gluing: Glue the glued graphite tubes and tube sheets according to the pre-installed marking, press them tightly, remove the putty from inside the graphite tubes, and simultaneously check all relevant technical parameters ； Curing treatment: Using the assembly frame as a base, a crane is used to lift the assembled products together with the frame onto a baking cart, which is then pushed into the furnace; thereafter, they are handed over to the impregnation section for curing treatment in accordance with the relevant process specifications ； Floating end assembly: Press all the rings through the cured floating end of the product, then attach the fluorocarbon rubber ring, graphite pressure ring, and graphite bolts, securing them in place ； Shell side leak detection: Inspect and tighten all sealing points on the shell side; fill the shell side with water and conduct pressure testing for leak detection as specified in the drawings until the required standards are met, followed by airtightness testing. If any leaks are found, repair them in accordance with the relevant procedures ； Piping leak testing: In accordance with the drawing specifications, the products that have passed the shell-side leak test are fitted with upper and lower end caps ；
Has it been repaired? I am a manufacturer of graphite equipment, and I can provide guidance on this matter: email at nta5280887@yahoo.com.cn. There are currently three main ways in which the tube sheets are connected to the heat exchange tubes in shell-and-tube graphite heat exchangers: full adhesive bonding at both ends, adhesive bonding at one end with mechanical sealing at the other end, and mechanical sealing at both ends. I’m not sure what type of heat exchanger you are referring to Also, if the equipment is blocked, is it the shell side that’s blocked? Still *cheng? Everything needs to be clarified.
Graphite heat exchanger, with the core assembly being integral