Abstract
A large amount of solid and liquid waste is produced in pesticide production. It is necessary to adopt appropriate disposal processes to reduce pollutant emissions. A co-incineration scheme for mixing multi-component wastes in a rotary kiln was proposed for waste disposal from pesticide production. According to the daily output of solid and liquid wastes, the proportion of mixing was determined. An experiment of the co-incineration of solid and liquid wastes was established. Experimental results showed that the mixed waste could be completely disposed at 850 °C, and the residence time in the kiln exceeded 1 h. A model method for mixture and diesel oil-assisted combustion was proposed. Numerical simulation was performed to predict the granular motion and reveal the combustion interactions of the co-incineration of mixed wastes in the rotary kiln. Simulation results reproduced movements, such as rolling and cascading, and obtained the optimum rotational speed and diesel oil flow for the rotary kiln incineration operation. The simulation showed that the temperature in the kiln was maintained at 850 °C, and the mass fraction of CO and O2 at the outlet reached the standard for the complete combustion of the waste. Finally, the rotary kiln incineration and flue gas treatment processes were successfully applied in engineering for green production of pesticides.
Highlights
China is a major country in the use of pesticides, it is a producer [1], with a total production of 2.491 million tons of pesticide in 2017
The rotary kiln incineration and flue gas treatment processes were successfully applied in engineering for green production of pesticides
A large amount of liquid and solid wastes generated during pesticide production are urgently needed for disposal
Summary
China is a major country in the use of pesticides, it is a producer [1], with a total production of 2.491 million tons of pesticide in 2017. The co-incineration of solid wastes and sewage has been widely used; that of solid and liquid wastes has rarely been reported, it has a good application prospect in the waste disposal of pesticide production. Rotary kiln incinerators are widely used in many large factories as a safe method to disposal of hazardous waste They are a general furnace for the disposal of solid, liquid, gaseous and complex combustible wastes [20,21]. A co-incineration scheme for mixed multi-component wastes in a rotary kiln was proposed for waste disposal from pesticide production. The co-incineration of multi-component wastes disposal technology in a rotary kiln could realize the harmless treatment of hazardous waste, a process which has better social, environmental, and economic benefits
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