二氰蒽醌农药废盐热处理特性

二氰蒽醌农药在生产过程中产生大量废渣，这些废渣中含有大量的盐、有机中间产物及副产物，成分复杂，难以妥善处理。为了解决农药废盐处置问题，本研究利用元素分析、XRF等表征手段对废盐进行基本成分分析，通过热重实验、热动力学对废盐燃烧/热解过程进行探究。废盐的燃烧/热解的TG/DTG曲线有两个主要的失重峰，最终的减重率分别为45.92%/51.81%。确定了废盐燃烧/热解的反应机理函数，表观动力学参数，废盐燃烧/热解的第二阶段反应机理函数相同。废盐的热处理减重率随着停留时间的延长而增加，当停留时间为30min时，废盐的减重率基本不再变化，减重率为45%左右。废盐经过900℃高温热处理后，残余物中的有机物含量明显减小，说明热处理可以降低废盐中有机物的含量，为后续的废盐处置提供了保障。

Study on Thermal Treatment Characteristics of Pesticide Waste Salts of Dithianon

A large amount of waste slag is produced in the production of Dithianon. These waste slags contain a large amount of salts, organic intermediates, and by-products. The components are complex and it is difficult to properly handle them. In order to solve the problem of disposal of pesticide waste salt, this study used elemental analysis, XRF and other characterization means to analyze the basic components of waste salt, and explored the combustion/pyrolysis process of waste salt through thermogravimetric experiment and thermal kinetics. The TG/DTG curves of the combustion/pyrolysis of the waste salt had two major weight loss peaks. The final weight loss rates were 45.92%/51.81%,respectively. The reaction mechanism function and the apparent kinetic parameters of waste salt combustion/pyrolysis were determined. The reaction mechanism function of the second stage of the waste salt combustion/pyrolysis was the same. The heat treatment weight loss rate of waste salt increased with the residence time, and when the residence time was 30 min, the weight loss rate of waste salt was basically not changed .The rate of weight loss was about 45%. After the waste salts were treated with high temperature at 900°C, the organic content in the residue was significantly reduced, but there was still a small amount of organic matter remaining.It shows that heat treatment can reduce the content of organic matter in waste salt and provide a guarantee for the subsequent disposal of waste salt.