Device for treating high-temperature tail gas of graphite production

Abstract

The invention discloses a device for treating high-temperature tail gas of graphite production. A gas inlet pipe is arranged on a spraying tower; a water circulation treatment device comprises a settling pond, an air flotation pond, a primary recovering pond, a clean water pond, a spraying pump and a spraying pipe; the water outlet end of the spraying tower is communicated with the water inlet endof the settling pond; a flocculating tank for adding a flocculating agent into the settling pond is arranged on one side of the settling pond; the first outlet of the settling pond is communicated with the primary recovering pond; the second outlet of the settling pond is communicated with the air flotation pond; the first outlet of the air flotation pond is communicated with the primary recovering pond; the second outlet of the air flotation pond is communicated with the clean water pond; and the water inlet of the spraying pump is communicated with the clean water pond. The device for treating high-temperature tail gas of graphite production has the following beneficial effects: the device can treat the high-temperature tail gas with complex and changeable components in the production process of the graphite, so the universality of the device is improved and the device is not constrained by the raw materials; furthermore, the whole treatment process is physical treatment and condensate water can be recycled, so that the treatment device is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of graphite production, in particular to a high-temperature tail gas treatment device for graphite production. Background technique [0002] Needle coke is the main raw material for producing high-power (HP) and ultra-high-power (UHP) graphite electrodes, and it can be divided into petroleum-based needle coke and coal-based needle coke. Due to the good graphitization performance of needle coke, the HP and UHP graphite electrodes produced by it have excellent electrical and thermal conductivity, thermal shock resistance and oxidation resistance, which can meet the requirements of high current density in large-capacity electric arc furnaces and rapid cooling. In the rapid heating state, there are high mechanical strength and other smelting quality requirements, which are incomparable in terms of performance of graphite electrodes produced by ordinary coke. [0003] In the process of producing graphite with ne...

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Problems solved by technology

[0003] In the process of producing graphite with needle coke, high-temperature sintering is an essential and important process, because the material composition in needle coke is extremely complex, so the composition of tail gas after high-temperature sintering is complex, containing a large amount of harmful gases and gaseous Oily substances, such as vulcanized gas and gaseous asphalt, the existing treatment process is to install a very long pipeline at the exhaust gas outlet of the high-temperature sintering furnace, and pass the high-temperature gas into the pipeline. With the transportation of the pipeline, the gaseous substances condense and pile up. In the pipeline, other substances are discharged at will. Under the increasingly stringent requirements of the country for environmental protection, this unenvironmentally friendly exhaust method will be banned. Therefore, it is necessary to develop a high-temperature sintering furnace exhaust gas for graphite production. processing device

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