Why do many factories prefer not to use graphite condensers?

This post was last edited by Shutong on 2019-12-22 at 10:57. A condenser is a device that converts vapor into liquid; various types of condensers are frequently used in petrochemical processes. They are most commonly employed in processes involving heat transfer through two-phase flow, such as the condensation of gas distillates from distillation columns, the condensation of water vapor, and the condensation of refrigerant vapor. The main equipment involved in the condensation process includes: shell-and-tube condensers, air coolers, plate condensers, and spiral plate condensers, etc. Firstly: Graphite condensers are not resistant to impacts; in particular, graphite should not be used for high-pressure condensers, as severe impacts can damage the graphite. Secondly: During the heat exchange process, gas-liquid two-phase flow can sometimes occur, which causes vibration in the equipment; this is fatal for graphite condensers. Again: When scaling occurs in the cooling water of graphite condensers, high-pressure cleaning is almost ineffective during maintenance. It’s not that it can’t be used, but there are limitations on its application; it can only be used in situations where impacts and vibrations are extremely low.

The appropriate criteria are generally 1: suitability for the operating conditions, 2: ease of manufacturing and maintenance, 3: cost-effectiveness.

It is expensive, prone to damage, and difficult to maintain; it is generally not used except in corrosive environments. Some wealthy manufacturers use tantalum instead of graphite for heat exchangers

Graphite heat exchangers have high heat exchange efficiency, but they are difficult to manufacture, expensive, have low strength, are prone to damage, and have poor repairability; as a result, their application range is limited

This post was last edited by Wang Genrong on 2019-12-23 09:12. I agree with your view. Graphite heat exchangers are primarily used in applications involving highly corrosive materials, especially corrosion caused by chloride ions and high-temperature dilute sulfuric acid, as well as corrosion from various salt solutions and organic solvents. Graphite heat exchangers are widely used in various fields such as chlor-alkali chemicals, pesticides, pharmaceuticals, metallurgy, environmental protection, nuclear energy, military industry, aerospace, and more; they currently play an irreplaceable and important role in many applications.

Whether to prefer graphite heat exchangers should not be determined by personal preference, but rather by operational conditions and process requirements. Chemical equipment made of any material has its specific application conditions, and under certain conditions it can even be irreplaceable. The quality of a device made of a certain material is not determined by its price, but rather by its suitability; one that is suitable and offers good value for money is considered good.

Graphite heat exchangers are suitable for use in strongly corrosive media, but they are difficult to apply in situations with high temperature difference stresses and high medium pressures. Moreover, they require a large amount of space and are complicated to install; economic viability should be considered.

It’s fragile, prone to leaks, and difficult to maintain; once we repaired a graphite condenser, the installation was shut down for over 2 months

It has a low load-bearing capacity and is prone to breaking

1. The joint is fragile and prone to breaking at the seams； 2. Prone to internal leakage, especially in horizontal models; maintenance is also inconvenient