A cooling device for preventing overheating and damage to the wall surface of graphite quenching tower

Abstract

The invention discloses a cooling device for preventing overheating and damage to the wall surface of a graphite quenching tower, which belongs to the technical field of waste gas treatment, and can realize self-variable pre-cooling parts straddling the inner and outer sides on the graphite liner, and guide the cooling water part to the The inner side of the graphite liner is pre-cooled near the inner end wall of the graphite liner, and the heat absorption effect is enhanced through a special vortex structure. At the same time, based on the impact of high-temperature flue gas on the self-variable pre-cooling part, a certain frequency vibration is formed to accelerate the nearby The evaporation effect reduces the temperature near the inner end wall of the graphite liner, and weakens the cooling pressure of the graphite liner on the high-temperature flue gas, so that it is always cooled within the normal heat conduction working range, avoiding overheating damage, and at the same time The unfolding and folding of the self-variable precooler is realized through the shape memory effect. When unfolded, it plays the role of precooling and weakening the graphite liner. When folded, the flow rate of high-temperature flue gas and the cooling effect of the graphite liner wall are restored.

Description

technical field [0001] The invention relates to the technical field of exhaust gas treatment, and more specifically relates to a cooling device for preventing overheating and damage to the wall surface of a graphite quenching tower. Background technique [0002] After pyrolysis and incineration of industrial waste, domestic waste, medical waste and toxic and harmful substances, the flue gas contains a large amount of acid gas and other harmful components, which must be treated before being discharged. Organic matter, heavy metals, dioxins, Furan and other pollutants, dioxins can be synthesized at around 300°C, so rapid cooling is required, and dioxins in the environment are difficult to degrade and eliminate naturally, including 210 compounds, which are highly toxic, 900 times that of arsenic, and have Known as the "poison of the century", one ten thousandth, or even one ten thousandth of a gram of dioxin will bring serious harm to health. [0003] Nowadays, the process exh...

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Problems solved by technology

[0002] After pyrolysis and incineration of industrial waste, domestic waste, medical waste and toxic and harmful substances, the flue gas contains a large amount of acid gas and other harmful components, which must be treated before being discharged. Organic matter, heavy metals, dioxins, Furan and other pollutants, dioxins can be synthesized at around 300°C, so rapid cooling is required, and dioxins in the environment are difficult to degrade and eliminate naturally, including 210 compounds, which are highly toxic, 900 times that of arsenic, and have Known as the "poison of the century", one ten-thousandth, or even one-billionth of a gram of dioxin will cause serious harm to health.

[0003] Nowadays, the process exhaust gas contains many components and contains a variety of corrosive gases. It is difficult for the traditional stainless steel quench tower to meet the requirements. Graphite has strong corrosion resistance and can perfectly replace stainless steel equipment. Rapid cooling of high temperature flue gas, impermeable graphite material has good thermal conductivity and corrosion resistance

Practice has proved that compared with traditional materials such as steel, ceramics, glass, and enamel, carbon and graphite have excellent corrosion resistance and thermal conductivity for all concentrations of hydrochloric acid, phosphoric acid, sulfuric acid, and hydrofluoric acid, including fluorine-containing media, and are energy-saving and environmentally friendly. It has good performance and is the only non-metallic material with higher thermal conductivity than metal, so it is widely used in the chemical industry. However, when the graphite quench tower cools high-temperature flue gas, the excellent cooling effect is to avoid overheating damage. , and this phenomenon is irreversible. Once it occurs, the damage will be aggravated rapidly. On the one hand, the thermal conductivity will decrease, and on the other hand, it will easily lead to the leakage of high-temperature flue gas. Therefore, generally speaking, it needs to be replaced as a whole, and the maintenance cost is very high.

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