Estimates of the influence of the solar irradiation spectrum energy on the intensity of heat treatment of solid waste with hexavalent chromium

4th International Conference on Safety Problems of Civil Engineering Critical Infrastructures

土木建筑工程

Bilalov, M.I.^1 ; Ziganshin, M.G.^2

Thermal Power Plants Department, Kazan State Power Engineering University, Kazan

420066, Russia^1

Thermal Power Engineering, Gas Supply and Ventilation Department, Kazan State University of Architecture and Engineering, Kazan

420043, Russia^2

关键词: Electrical and electronic equipment;    Field test;    Heat treatment process;    Hexavalent chromium;    Reduce energy consumption;    Reducing environment;    Solar irradiation;    Wavelength ranges;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/481/1/012044/pdf
DOI  :  10.1088/1757-899X/481/1/012044

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Methods of processing chromium containing wastes are considered. Positive and negative aspects of widely used methods of transfer of hexavalent chromium to trivalent are indicated. It is proposed as the most effective way of thermal neutralizing of chromium-containing waste in a reducing environment. Field tests of samples containing hexavalent chromium and organic compounds, which showed the possibility of intensification of heat treatment processes using solar energy, were carried out. An estimation is obtained for the wavelength ranges of the near UV, the visible, and the near IR spectrum, within the limits of which photochemical reactions for the reduction of hexavalent chromium are possible. This will reduce the temperature of heat-treatment and, together with it, reduce energy consumption in heat treatment devices. The latter is also important for reducing greenhouse gas emissions.