Environment-friendly reaction furnace with good heat preservation effect and used for producing hydrofluoric acid

Abstract

The invention discloses an environment-friendly reaction furnace with a good heat preservation effect and used for producing hydrofluoric acid. The environment-friendly reaction furnace comprises a reaction furnace body, wherein a bracket and a base are mounted at the lower side of the reaction furnace body; a heat preservation type furnace wall is arranged at the outermost side of the reaction furnace body; the furnace wall comprises a red brick, a heat preservation brick, a heat insulation cotton layer, a heat conducting plate and a hot air chamber; the reaction furnace body is provided withfluorite powder feeding openings, a sulfuric acid feeding opening, a hydrofluoric acid discharging opening and a dreg outlet; a rotary motor is arranged between the two fluorite powder feeding openings; the lower end of the rotary motor is connected with a speed reducer and a rotary table; a hot air recycling pipe is connected with the upper side of the hot air chamber in the furnace wall; an airpump is arranged in the middle of the hot air recycling pipe; a heat supplying device is connected with the lower end of the hot air recycling pipe; the heat supplying device is connected with a hotair inlet pipe; one end of the hot air inlet pipe stretches into the hot air chamber. The environment-friendly reaction furnace with the good heat preservation effect and used for producing the hydrofluoric acid has the good heat preservation effect and can be used for recycling hot air; resources are saved and a reaction speed is rapid, so that the environment-friendly reaction furnace is suitable for small and medium enterprises.

Description

technical field [0001] The invention relates to the field of hydrofluoric acid production, in particular to an environment-friendly reaction furnace with good heat preservation effect for hydrofluoric acid production. Background technique [0002] Hydrofluoric acid is extremely corrosive and can aggressively corrode metal, glass, and objects containing silicon. Hydrofluoric acid is also used to etch glass, and can engrave patterns, mark scales and characters; hydrofluoric acid has the ability to dissolve oxides, and it plays an important role in the purification of aluminum and uranium. The semiconductor industry uses it to remove oxides from silicon surfaces, it can be used as a catalyst in the alkylation reaction of isobutane and n-butene in oil refineries, and it can also be used in the "pickling" process to remove oxygen-containing impurities from stainless steel surfaces. Hydrofluoric acid is used. Hydrofluoric acid is also used in the synthesis of various fluorine-co...

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Problems solved by technology

At present, the industrial generation of hydrofluoric acid is mostly prepared by fluorite powder and sulfuric acid, and is heated in the reaction furnace. However, the heat preservation effect of the current reaction furnace is not good, and the heat is not recovered in time, resulting in heat loss. In addition, the reaction efficiency of the preparation of hydrofluoric acid If the temperature is too low, and the phenomenon of wall sticking often occurs, the service life of the reaction furnace is short

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