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

2021

Rocz Ochr Srod

The issues related to the emission of atmospheric pollutants during the provision of energy supply services and the circulation of household waste in settlements are considered. The ways of air pollution by toxic compounds and the formation of greenhouse gases with existing methods of waste heat treatment are analyzed. The issues of reducing the content of toxic emissions in combustion products are studied on the basis of a numerical experiment by means of computational fluid dynamics (CFD). The combustion processes in the power boiler TP-14A (E 220/100) are considered and adequate boundary conditions for the processes of aerodynamics, heat transfer and combustion of gas fuel are determined. The temperature, velocity and concentration fields in the furnace of the investigated boiler have been determined. According to the results of the calculations performed, the formation of chemical underburning and nitrogen oxides is predicted.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Solid and Gaseous Fuel Combustion in the TP-14A Boiler Furnace to Reduce PCDD/F and Greenhouse Gas Emissions

Zheltukhina

2021

Rocz Ochr Srod

“…In order to reveal the influence of atmospheric factors on conglomerates of hexavalent chromium with an organic film-forming substance (linseed oil oxol), field tests in Kazan and Naberezhnye Chelny, Republic of Tatarstan, Russia carried out [2]. The experiment involved 11 samples.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies and correlation analysis of atmospheric factors affecting hexavalent chromium conglomerates with organic materials

Bilalov¹,

2020

E3S Web of Conf.

Field testing of samples containing hexavalent chromium and organic compounds were carried out, which showed the possibility of intensifying the processes of their heat treatment using solar energy. The correlation analysis between various factors of atmospheric exposure and changes in the state of sam-ples was performed. In the course of the study, an estimate was obtained for the wavelength ranges of the near-UV, visible and near-IR spectrum, within which photo-chemical reactions of hexavalent chromium re-duction are possible. The temperature and hydrostatic pressure influence on the chemical reactions intensity in the sample was also assessed. Based on the data obtained, theoretical pre-conditions of energy efficiency of heat treatment process were formed, which should be verified by subsequent laboratory tests.

Numerical modeling of combustion of gaseous and solid fuels in the furnaces of small and large boilers to reduce harmful emissions

Zheltukhina¹,

Pavlova²,

2020

E3S Web of Conf.

The issues of the formation of toxic compounds that enter the air of the residential area during the circulation of household waste and the provision of energy supply services, in particular, during the decentralization of heat supply to residential buildings, are considered. The problems of finding the optimal ways to reduce toxic emissions are solved using a numerical experiment based on computational fluid dynamics. The results of numerical modeling of the corresponding combustion device are compared with the geometry created using the Gambit software and in the Solid Edge 3D design environment. The influence of the pressure in the furnace on the characteristics of fuel combustion during operation in the pressurization mode of the recently widespread condensing boilers is given. Acceptable simplifications for the application of the normative method in the calculations of modern combustion devices with a specific geometry are proposed.