Spraying tower for treating exhaust gas of high-temperature sintering for graphite production

Abstract

The invention discloses a spraying tower for treating exhaust gas of high-temperature sintering for graphite production. The spraying tower comprises a tower body, wherein an exhaust gas pipe and a liquid discharging pipe are arranged on the tower body; a gas exhaust device is arranged at the top of the tower body; a blanking valve is arranged at the bottom of the tower body; a spraying device ismounted at the top of an inner cavity of the tower body; a demister is also arranged at a position, which is located above the spraying apparatus, on the tower body; a heating cavity is formed in thetower wall of the tower body; an insulating heating wire is arranged on the inner side wall of the heating cavity; a heat isolation layer is arranged on the outer side wall of the heating cavity. Thespraying tower disclosed by the invention has the beneficial effects that due to the heating cavity and the insulating heating wire, the temperature in the tower body can rise up, so that an oily substance stuck on the tower wall is softened to form fluid which is finally discharged through the blanking valve; by the arrangement of the demister and a hot air blower for blowing hot air to the demister, discharging of foggy gas is avoided, and the aim of environmental protection is fulfilled; therefore, the spraying tower has the advantages of convenience in sewage drainage and environmental protection.

Description

technical field [0001] The invention relates to the technical field of graphite production, in particular to a spray tower used for high-temperature sintering tail gas treatment for graphite production. Background technique [0002] Needle coke is the main raw material for the production of high-power (HP) and ultra-high-power (UHP) graphite electrodes, which 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 proces...

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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. Whether it is petroleum-based needle coke or coal-based needle coke, after high-temperature sintering, the composition and content of the tail gas are different. Fixed, and the composition is extremely complex, containing a large amount of harmful gases and gaseous oily substances, such as sulfide gas, 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 In the pipeline, with the transportation of the pipeline, the gaseous substances condense and pile up in the pipeline, while other substances are discharged at will. Under the increasingly stringent requirements of the country for environmental protection, this unenvironmentally friendly exhaust method will be eliminated. Prohibition, the company has developed a high-temperature sintering gas treatment device for graphite production, which sprays cooling water to condense and dissolve the high-temperature gas, but it is difficult to discharge the oily substances after the high-temperature gas condenses, such as asphalt, these oily substances Substances will gradually be processed by high-temperature gas, and will accumulate more and more, and finally block the spray tower. Therefore, for the condensation and discharge of high-temperature gas, the company has developed a spray for high-temperature sintering tail gas treatment for graphite production. shower tower

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