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How to Replace Graphite Heat Exchanger Piping
Release time:
2022-05-24
When the thermal conductivity of the graphite heat exchanger decreases, maintenance should be stopped. If the graphite heat exchanger is seriously scaled, it can be cleaned by appropriate chemical methods; if the particles in the tube are clogged, it can be heated and melted for cleaning, which cannot be solved by mechanical equipment.
How to care and maintain graphite heat exchanger thermal conductivity decrease
When the thermal conductivity of graphite heat exchanger decreases, maintenance should be stopped. If the graphite heat exchanger is badly scaled, it can be cleaned by appropriate chemical methods; if the particles in the tube are clogged, it can be heated and melted for cleaning, which is not solved by mechanical equipment.
Machine cleaner. Repair a variety of shovel, laser cutting, soft brush, air compression, high pressure steam cleaning. If the scale is serious or completely clogged, it can be cleaned with a tubular flushing auger.
High pressure pumps for scrubbing. Water flows through a regulator and then dust is ejected from a high pressure hose and portable gun. Quartz sand mixed with water is effective.
Chemical descaling is used. The scaling material of the graphite heat exchanger is first chemically analyzed, and then the solvent for cleaning can be determined. Sulfate scale and silicate scale are generally washed with alkali, and carbonate scale is washed with acid. Sodium carbonate and sodium hydroxide can be used as coking grease.
Detergents, stain removers, etc. Clean with a certain percentage of water. When choosing chemical cleaning, be sure to consider corrosion inhibitors. After chemical cleaning, add water and circulate several times until the water stops. In addition to the above cleaning methods, you can also choose the sponge ball active cleaning method.
How to correctly replace the pipes of graphite heat exchanger?
Graphite heat exchanger is used for a long time, and the graphite pipe is damaged. At this time, promptly check whether there is leakage. If there is a leak, it should be replaced in time. In my opinion, the general inspection method is to test the pressure of the pipe root first to see which pipe has a leak, but the leak detection efficiency is too low. For example, it takes five minutes to check the pipe of graphite heat exchanger, so it takes nearly two days to check the equipment.
Graphite heat exchangers can handle water in the pipe section. When the water level is between 50-100 millimeters, the valve on the exhaust pipe can be opened to discharge the water leaking into the shell section of the graphite heat exchanger. It is important to note at this point that the graphite tubes in the unit are easy to find. If there is a swirl in the water, plug it as soon as possible. Close the valve on the graphite heat exchanger exhaust pipe at the same time, and so on.
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