Graphite heater suitable for gas heating

Abstract

The graphite heater comprises a shell, an air inlet is formed in the side wall of the shell, an air outlet is formed in the other side wall, opposite to the air inlet, of the shell, a plurality of layers of graphite heating plates are sequentially arranged in the shell in the gas flowing direction, and a plurality of air passing through holes are formed in the surface of each graphite heating plate. The assembled structure is adopted, the single graphite piece is simple in structure and easy to machine, the single part can be replaced, and resource waste is avoided; the voltage between the adjacent graphite plates can be below 5V by adjusting the voltage of the power supply and the number of layers of the graphite heating plates, and the circuit failure rate caused by carbon deposition of an insulating part can be effectively reduced; the high-temperature part does not contain metal materials and is suitable for heating gas which does not react with graphite in a high-temperature state.

Description

technical field [0001] The invention belongs to the technical field of industrial heating, and in particular relates to a graphite heater suitable for gas heating. Background technique [0002] Under the “dual carbon” goal, the process of heating gas with clean energy such as electricity can effectively reduce the use of coke in the steel industry and chemical industry, thereby greatly reducing CO 2 As a new type of material, graphite materials are more and more widely used, and the application of high-purity isostatic graphite is more prominent; [0003] Different from general high temperature resistant materials, graphite not only does not soften, but increases in strength when the temperature increases, and the tensile strength of graphite at 2500°C is doubled compared with room temperature, which also makes graphite itself excellent in high temperature resistance; In order to match a suitable external power supply, most of the graphite heaters in the existing technology...

AI Technical Summary

Problems solved by technology

[0003] Different from general high-temperature-resistant materials, graphite not only does not soften when the temperature rises, but its strength increases instead. At 2500°C, the tensile strength of graphite doubles that at room temperature, which also makes graphite itself excellent in high-temperature resistance; In order to match a suitable external power supply, most of the graphite heaters in the existing technology centers are hollow cylindrical structures, which are complicated to process, and have poor impact resistance and are easily damaged, so they are not suitable for heating high-pressure and large-flow gases.

[0004] At present, there is no high-power equipment on the market that heats the gas to a higher temperature through electric heating. Conventional high-temperature gas heating generally uses a regenerative preheater such as a hot blast stove, that is, the high-temperature flue gas generated by gas combustion flows through the refractory channel. Make the high-temperature flue gas store heat on the refractory material, and then the gas flows through the high-temperature refractory material and is heated

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