Gasification separation and purification method of mixed waste acid
A gasification separation and purification method technology, applied in chlorine/hydrogen chloride purification, chemical instruments and methods, nitric acid and other directions, to achieve the effect of novel separation concept, reasonable structure design and good separation effect
Active Publication Date: 2019-05-07
RUANSHI CHEM CHANGSHU
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Problems solved by technology
[0003] The technical problem mainly solved by the present invention is to provide a gasification separation and purification method of mixed waste acid, which can solve the above-mentioned problems existing in the existing mixed waste acid treatment
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Embodiment 1
[0024] The invention discloses a gasification separation and purification method of mixed waste acid, which comprises the following steps:
[0025] (1) Mixed waste acid mist gasification treatment: Use compressed hot air to mist the mixed waste acid in the atomization device; wherein, the water content of the compressed hot air is less than 5%, the temperature is 100°C, and the pressure is 0.5 ~5MPa;
[0026] (2) Screening and separation: the mixed waste acid after the mist gasification treatment in step (1) is tangentially introduced into the gaseous vortex ion membrane screener, and rotated at a high speed of 500-5000r / min in the tubular ion membrane for high-speed sieving , realize the separation of light water vapor and heavy acid mist;
[0027] (3) Separation of light water vapor: the light water vapor separated in step (2) is exported from the top of the gaseous vortex ion membrane screener;
[0028] (4) Condensation recovery of mixed waste acid: the heavy acid mist se...
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Abstract
The invention discloses a gasification separation and purification method of mixed waste acid. The method comprises the following steps: (1) carrying out atomization treatment on mixed waste acid; (2)carrying out filtering and separating; (3) separating light water vapor; and (4) condensing and recovering the mixed waste acid. The method is green and environmentally friendly, and the concept is novel. First, the mixed waste acid is atomized, water in the atomized mixed waste acid is completed separated out by using a gaseous vortex ion membrane screening device, and then the mixed mist of thewater-free mixed waste acid is subjected to condensation treatment, so that effective separation among various waste acids can be realized by collecting acid solutions with different concentration points, and secondary pollutants which are harmful to the environment are not generated. According to the invention, the structural design is reasonable, the separation concept is novel, the separationeffect is good, separation efficiency is high, comprehensive performance is excellent, and the market prospect is wide.
Description
technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a method for gasification, separation and purification of mixed waste acids. Background technique [0002] Most of the waste acids produced in industrial production contain hydrochloric acid, nitric acid, sulfuric acid and phosphoric acid. The existing treatment methods for these spent acids are usually distillation or addition of reagents such as calcium or alkali for neutralization. The disadvantage of the distillation method is that since the boiling point of most industrial acids is close to that of water, the purified acid recovered purely by distillation still contains a large amount of water even after repeated distillations, resulting in a concentration that is always lower than 70%, and its use is quite limited. ; Adding reagents such as calcium or alkali for neutralization treatment will produce a large amount of calcium salts and alkali salts. ...
Claims
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IPC IPC(8): C01B7/07C01B17/90C01B21/46C01B25/234
Inventor 阮玉根阮垚
Owner RUANSHI CHEM CHANGSHU