A method of using a thermal storage secondary combustion purification device for treating adsorption vocs exhaust gas and solid waste

Abstract

The invention relates to the technical field of treatment of volatile organic compound waste gas, particularly to a utilization method of a heat accumulation secondary combustion purification device for treating solid waste generated after VOCs waste gas adsorption. The utilization method is characterized in that ash particles adhere to melt of the wall of a secondary heat accumulation combustion settling chamber under the action of surface adsorption of molten salt pasters and ash melt and the action of gravity settling separation, undecomposed chlorine-containing organic matters, fluorine-containing organic matters and sulfur-containing organic matters continuously burn, are decomposed, and react with components like calcium, silicon and magnesium, and high-melting-point slag ash is formed, drops to a slag falling opening along the body wall of the independent closed heat accumulation combustion settling chamber, and is discharged through a slag cooler, so that purification efficiency of pollutants like HCl, SO2, heavy metals and particles is greatly improved.

Description

technical field [0001] The invention relates to the technical field of volatile organic compound waste gas treatment, in particular to a method for using a heat storage secondary combustion purification device for treating adsorbed VOCs waste gas and solid waste. Background technique [0002] Gaseous pollutants emitted by industry are the main source of atmospheric environmental pollutants, among which volatile organic compound waste gas (VOCs) is a gaseous pollutant that is seriously harmful to the environment, and it is also an occupational hazard that affects the health of operators in the workplace It is widely derived from chemical industries such as paints, coatings, coatings, lubricants, and rubber. Due to its huge destructive effect on the human body and the natural environment, the country has issued relevant laws and regulations to strictly control its governance and emissions. At present, the commonly used treatment methods of organic waste gas treatment technolo...

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Problems solved by technology

[0003] Example 1 of the prior art uses two combustion methods to incinerate (pyrolyze) solid waste (garbage), trying to increase the residence time of the furnace and the second combustion chamber to ensure effective decomposition of pollutants. As we all know, the moisture content of garbage is relatively low. High, during the combustion process of the furnace, its moisture forms superheated steam and is discharged with the flue gas. In addition, the N in the air 2 It is also a non-combustible part, which will take away a lot of heat and cause the temperature of the furnace to drop. In other words, the heat load of garbage fuel is low, which will inevitably lead to low combustion temperature of garbage in the furnace and the secondary combustion chamber. If it is in the secondary combustion chamber (rising chamber, flue) Arranging the heating surface will not guarantee the purification conditions required by the "Standards for Pollution Control of Domestic Waste Incineration" GB 18485-2014, that is, the incineration temperature in the furnace is ≥850°C, and the residence time of flue gas at this temperature is ≥2s, which is very easy to cause difficulty in disposal Large, harmful to the environment, heavy dioxin pollutants, etc.

Moreover, the furnace and the secondary combustion chamber are far apart in the plane layout of the equipment, so particles are easily deposited in the flue connecting the two. On the one hand, it causes high-temperature corrosion of the flue; The working environment changes from negative pressure to positive pressure, allowing pollutants to leak from the furnace

Existing technology example 2 The regenerative secondary combustion equipment is mainly applied to the technical field of purifying waste gas produced during the production of cement clinker. The technical solution that is relatively close to this case is that the regenerative secondary combustion equipment can make carbon compounds The combustion chamber is oxidized (burned, pyrolyzed) at a temperature higher than 850°C. At the same time, it is emphasized that the residence time is ≥ 2s. The pollutants are only mentioned for the purification treatment of nitrogen oxides and CO. For dioxins, HCl , mercury and its compounds, SO 2 , particles and other pollutants are not mentioned

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