How is graphite used to make graphite condensers?

To give a simple example, how can a pile of loam or sand be turned into buildings? You can add a binding agent such as cement to the sand to achieve this, or it can be crushed and shaped under high pressure to form blocks. For greater strength, it can be sintered, which makes it more solid. By the same principle, graphite, with its loose layered structure, is suitable for use as a lubricant; binders can also be added to it or it can be shaped through pressing.

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It’s hard to put into words; welcome to visit our company! Take a look at the manufacturing process of the graphite heat exchanger from beginning to end.

Graphite heat exchangers can be classified into three types based on their structure: block-and-hole type, shell-and-tube type, and plate type. Block pore type: It is assembled from several porous block-shaped graphite components. Shell-and-tube type: Shell-and-tube heat exchangers play an important role in graphite heat exchangers, and they are further divided into fixed-type and floating-head types based on their structure. Plate type: Plate heat exchangers are made by bonding graphite plates together. In addition, there are also immersive, spray, and shell-and-tube types (see coiled-tube heat exchangers, shell-and-tube heat exchangers). Graphite heat exchangers have good corrosion resistance, their heat transfer surfaces do not tend to scale, and they exhibit excellent heat transfer performance. However, graphite is prone to brittle fracture and has low bending and tensile strengths; therefore it can only be used at low pressures. Even for the blocky porous structures with the best pressure resistance, the operating pressure is generally only 0.3 to 0.5 MPa. Graphite heat exchangers are expensive, large in size, and not widely used. It is mainly used for heat exchange in corrosive media such as hydrochloric acid, sulfuric acid, acetic acid, and phosphoric acid, for example as a condenser for acetic acid and acetic anhydride. Graphite pipes are classified into those impregnated with synthetic resin, water glass resin, and asphalt, depending on the material used for impregnation.

Things are different now; graphite heat exchangers can be manufactured as pressure vessels, with a design and manufacturing approval level of A4, and a maximum operating pressure of ≤2.5 MPa.