Oxygen bomb combustion method for testing content of halogens and content of sulphur in industrial solid waste

Abstract

The invention provides an oxygen bomb combustion method for testing the content of halogens and the content of sulphur in industrial solid waste. The concentration-spectrum peak area working curve of to-be-measured element series standard solution is drawn, a proper amount of sample is added to an oxygen bomb based on the principle that the amount of sample increases with the reduction of calorific value, absorption liquid the volume of which is 0.05 time that of the oxygen bomb and a proper amount of H2O2 with mass fraction of 10-30% are also added, the sample is burnt and oxidized in the oxygen bomb to obtain a substance which is then absorbed by the absorption liquid so as to generate test sample solution, the spectrum peak area of the sample solution is measured by means of an ion chromatograph, and the content of halogens and the content of sulphur in waste are calculated according to the spectrum peak area and the series standard solution working curve. According to the method, by adding a certain amount of H2O2, oxidation of sulphur in the combustion process can be promoted, complete combustion of sulphur during testing is ensured, loss is reduced, and test results are more accurate; meanwhile, the weight of the sample added each time is determined based on the principle that the amount of sample increases with the reduction of calorific value, so that complete combustion of the sample during testing is guaranteed and testing time is shortened.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis and detection, in particular to a method for determining halogen and sulfur content in industrial solid waste by an oxygen bomb combustion method. Background technique [0002] The halogen content and sulfur content in the exhaust gas discharged after high-temperature incineration of industrial waste cannot exceed the standard. The current detection method adopts the standard EN 14582:2007(E). After the sample is processed, it is quantitatively analyzed by ion chromatography. The treatment method is described as follows: the sample is oxidized by combustion in the oxygen bomb, and the chlorine-containing and sulfur-containing compounds are converted into halides and sulfides, respectively, which are then absorbed by the absorption liquid and / or dissolved and absorbed in the absorption liquid. In the traditional treatment process, sulfur It cannot be completely oxidized, which ultimately ...

AI Technical Summary

Problems solved by technology

[0002] The halogen content and sulfur content in the tail gas discharged after high-temperature incineration of industrial waste cannot exceed the standard. The current detection method adopts the standard EN 14582:2007 (E). After the sample is treated, it is quantitatively analyzed by ion chromatography. The treatment method is described as follows: the sample is oxidized by combustion in the oxygen bomb, and the chlorine-containing and sulfur-containing compounds are converted into halides and sulfides respectively, and then absorbed and / or dissolved in the absorption liquid. In the traditional treatment process, sulfur It cannot be completely oxidized, which will eventually affect the accuracy of the measurement results