A Harmless Treatment Process for Waste Hazardous Chemicals Containing Arsenic
A technology of harmless treatment and chemicals, applied in the direction of solid waste removal, etc., can solve problems such as potential safety hazards, lack of harmless disposal technology for hazardous chemicals containing arsenic, and the lack of disposal qualifications and actual disposal capacity destruction units, etc. , to achieve the effect of strong practicability, avoiding unpredictable safety risks, and eliminating hidden dangers of social safety
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Embodiment 1
[0027] Embodiment 1 pilot test process:
[0028] (1) Processing object
[0029] Suzhou Shangmei International Cosmetics Co., Ltd. contains arsenic poisonous drugs: 300g sodium arsenate, 493g diarsenic trioxide, 250g sodium arsenite, and the total arsenic in the leachate of the original mixture is higher than 50000mg / L.
[0030] (2) Treatment process
[0031] Process flow diagram as figure 1 Shown:
[0032] In a mobile reactor, add the above-mentioned arsenic-containing highly toxic mixture into water, add ferrous sulfate to form a solution, make the molar ratio of Fe and As in the solution greater than or equal to 2.5:1, and then use nitric acid to adjust the pH value of the solution to less than 2, then add hydrogen peroxide (the mass percent concentration of hydrogen peroxide is 20% to 30%) for oxidation reaction; wherein the H2O2 in the hydrogen peroxide is controlled 2 o 2 The molar ratio of arsenic to arsenic in waste containing arsenic is 3:1. After the reaction is...
Embodiment 2
[0038] Embodiment 2 engineering application:
[0039] (1) Processing object
[0040] Wujiang Lvyi Solid Waste Recycling and Disposal Co., Ltd. contains 15 tons of dangerous chemicals containing arsenic, with an arsenic content (average) of 37.18%, and leached arsenic of 29702mg / L.
[0041] (2) Process parameters of each processing unit
[0042] Reaction pool: The reaction pool is a PP structure with a size of Φ3.0m×2.2m and an effective volume of 14m 3, equipped with a stirring device with a power of 7.5kW, an exhaust system on the top (the power of the induced draft fan is 5.5kW), and a set of plate and frame filter press (80m 2 ).
[0043] Curing machine: twin-shaft forced mixer, productivity 25m 3 / h.
[0044] Process flow diagram as figure 1 Shown:
[0045] Put 200kg of the above-mentioned arsenic-containing dangerous chemicals into the reaction tank, add ferrous chloride aqueous solution, make the molar ratio of Fe and As in the solution be 2.5:1, then adjust the p...
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