A treatment agent for waste gas containing polychlorinated aromatic hydrocarbons and its preparation method

Abstract

The invention provides a treatment agent for waste gas containing polychlorinated aromatic hydrocarbons, which uses light calcium carbonate as the main component, adds oxides of iron, manganese and titanium, and uses fibrous calcium sulfate as a reinforcing agent. In terms of excluding water, it is made of raw materials including 60-70 parts of light calcium carbonate, 5-10 parts of ferrous sulfate, 15-20 parts of manganese sulfate, and 15-20 parts of metatitanic acid; it has high hydrolysis of polychlorinated aromatic hydrocarbons Activity and combustion activity of organic components, dechlorination of polychlorinated aromatic compounds and catalytic combustion of by-product chlorine-free organic components at a temperature of 300‑350 ° C, converted into calcium chloride, carbon dioxide, and water, easy to achieve standards emission, and the polychlorinated aromatics conversion capacity and dechlorination capacity of the treatment agent are not affected by the carbon dioxide contained in the exhaust gas. The raw materials used in the treatment agent are cheap, the cost of the treatment agent is low, and the long-term storage performance remains unchanged.

Description

Technical field [0001] The present invention is an organic chlorine exhaust gas treatment technology, and more particularly to treatment agents containing polychloroferonal exhaust gas and a preparation method thereof. Background technique [0002] Chlorine-containing organic matter, also known as organic chlorine, is an important industrial raw material or product, such as chloroalkane, chloroferic hydrocarbon, is widely used as a chemical reactive raw material, solvent, or many processing additives of many processing aids; Volatile, difficult degradability, and toxicity, exhaust gas, waste liquid, organic chlorine in the waste to handle, transform, remove, disposal or landfill; in which the treatment of exhaust gas organic chlorine is the most important technical field because The organic chlorine in the waste, the organic chlorine in the waste is taken in the exhaust gas, and it is often more convenient and easy. [0003] When the organic chlorine content is high in the exhaus...

AI Technical Summary

Problems solved by technology

[0004] For chlorine such as 500mg / m 3 The common waste gas containing organic chlorine is treated at 250-400°C by using calcium oxide as the main component and adding iron, manganese, copper and other oxides. It is more convenient and easy in many cases. Chlorine in chlorine is transformed into calcium chloride and is trapped in the dechlorination agent, but chlorine-free organic matter generally still exists in the exhaust gas after treatment. When the chlorine-free organic matter exceeds the standard, it still cannot be discharged up to the standard, or further treatment is required to meet the standard emissions; and when the exhaust gas contains carbon dioxide, it will convert calcium oxide into non-alkaline calcium carbonate, or absorb carbon dioxide in long-term storage, resulting in a decrease in the organic chlorine conversion capacity and dechlorination capacity of the dechlorination agent.

Some copper-containing dechlorination agents may also lead to the production of higher chlorinated organochlorines or increase the complexity of organochlorines

[0005] Due to the stability of polychlorinated aromatic hydrocarbons, if they are treated by catalytic combustion, the hydrolysis process is more complicated and difficult. If the dechlorination agent contains calcium oxide, calcium hydroxide and other iron, manganese, copper, etc. If the oxide components cannot be reasonably matched, the conversion rate of polychlorinated aromatic hydrocarbons is often not high, or too high a dechlorination temperature condition is required, resulting in the production of organic chlorine with higher chlorine content or increasing the complexity of organic chlorine