Graphite heat exchanger is a heat transfer device made of graphite. The graphite in the manufacture of heat exchanger should be non transparent, and is often used in the non - permeable graphite and graphite.
Structure
The graphite heat exchanger can be divided into 3 types: block type, tube shell and plate type according to its structure. A piece of hole: a plurality of bulk graphite assemblies that are formed by a plurality of holes. Shell and tube type: tube shell type heat exchanger in graphite for heat exchanger occupies an important position, according to the structure is divided into two kinds of fixed and floating head. Plate: made of graphite bonding plate heat exchanger. In addition, there are immersion, spray type and sleeve type, etc. (see snake tube heat exchanger, sleeve type heat exchanger). Graphite heat exchanger has good corrosion resistance, heat transfer surface is not easy to fouling, heat transfer performance is good. However, the graphite is easy to crack, the bending and tensile strength is low, and it can only be used for the low pressure, even though the pressure is the best piece of porous structure, the working pressure is generally only 0.3 ~ 0.5 mpa. Graphite heat exchanger with high cost, large size, use is not much. It is mainly used in the heat transfer of corrosive media such as hydrochloric acid, sulfuric acid, acetic acid and phosphoric acid, such as the condenser of acetic anhydride and acetic anhydride.
Graphite tubes are divided into synthetic resin impregnation, water glass impregnation, and pitch impregnation according to their different materials.
Characteristic
Graphite heat exchanger has good corrosion resistance, heat transfer surface is not easy to fouling, heat transfer performance is good. However, the graphite is easy to crack, the bending and tensile strength is low, and it can only be used for the low pressure, even though the pressure is the best piece of porous structure, the working pressure is generally only 0.3 ~ 0.5 mpa.
Graphite heat exchanger with high cost, large size, use is not much. It is mainly used in the heat transfer of corrosive media such as hydrochloric acid, sulfuric acid, acetic acid and phosphoric acid, such as the condenser of acetic anhydride and acetic anhydride. Mainly used in the chlor alkali chemical industry, petroleum chemical industry, fluoride salt, titanium dioxide, zirconium, chloroacetic acid, chlorinated paraffin, monocrystalline silicon fluorine
Classification
1.A piece of hole: a plurality of bulk graphite elements are assembled in a plurality of holes.
2.tube shell type: tube shell type heat exchanger in graphite for heat exchanger occupies an important position, according to the structure is divided into two kinds of fixed and floating head.
Shell and tube heat exchanger (shell and tube heat exchanger) is also called tubular heat exchanger. Is to close the bundle in the shell wall as heat transfer surface heat exchanger. The structure of the heat exchanger is simple and reliable, and can be made of various structural materials (mainly metal materials), and can be used in high temperature and high pressure.
3.The panel: made of graphite plate bonded plate heat exchanger. In addition, there are immersion, spray type and sleeve type, etc. (see snake tube heat exchanger, sleeve type heat exchanger).
Heat exchanger is a metal sheet with a corrugated shape by a series of stacked a new high-efficiency heat exchanger. A thin rectangular channel is formed between the plate and plate, and the heat exchange is carried through the half piece. Heat exchanger is an ideal heat exchange equipment for liquid - liquid, liquid - vapor. It has the characteristics of high heat transfer efficiency, small heat loss, compact structure, small size, convenient installation and cleaning, wide application, long service life, etc.. Under the same pressure loss, the heat transfer coefficient is 3-5 times higher than that of tubular heat exchangers, and the area of the tube type heat exchanger is 1/3, and the heat recovery rate can be as high as 90%.
