Pulse type ultraluminescence method sulphur ¿Cmeasuring dedicated quartz tube

Abstract

The present invention discloses a quartz tube special for detecting sulfur by impulse type ultraviolet fluorescence method. Sampling tube and sample discharging tube are set respectively on two end of firebox, a diameter accrescent vaporizing cavity is on the end of the sampling tube inserted in the firebox, a buffer tube with one end closed and one end opened is in the firebox, the sample discharging tube extends into the buffer tube and the inside and outside of the buffer tube have clearance, and the exit of said vaporizing cavity is taper ring channel. Because the present invention employs new structure design, it's convenient for sampling in a large, prolonging the circulation time of the sample in the firebox and making the sample burning sufficiently, eliminating remnant carbon and avoiding the quartz tube and correlation gas roads changing black, improving the sulfur detecting efficient. The sulfur detecting lower limit is 10PPb in impulse type ultraviolet method.

Description

technical field [0001] The invention relates to a combustion tube used for measuring sulfur content by an ultraviolet fluorescence method, in particular to a quartz tube specially used for measuring sulfur by a pulsed ultraviolet fluorescence method. Background technique [0002] In the fields of petrochemical production and environmental protection, accurate determination of sulfur content in samples is very important. At present, the ultraviolet fluorescence method is widely used to measure sulfur. During the operation, the sample should be sent into the combustion tube first, and the sulfur will be oxidized into sulfur dioxide in the oxygen-enriched condition. According to the requirements of the industry standard (SH / T0689-2000), there are two types of combustion tubes: direct sampling combustion tube and boat sampling combustion tube. The main structure is that the middle part is the combustion chamber, and there are sampling tubes and The sample outlet tube, and the p...

AI Technical Summary

Problems solved by technology

According to the requirements of the industry standard (SH / T0689-2000), there are two types of combustion tubes: direct sampling combustion tube and boat sampling combustion tube. The main structure is that the middle part is the combustion chamber, and there are sampling tubes and The sample outlet tube, and the part where the sample injection tube is inserted into the combustion chamber is a straight-through tube with a constant diameter. This structure has the following disadvantages: the sample injection volume is small, the sample stays in the combustion tube for a short time, and cannot be fully burned. Carbon causes blackening of the combustion tube and related gas paths, affecting the accuracy of sulfur measurement

Therefore, the existing combustion tube cannot meet the needs of the more advanced pulsed ultraviolet fluorescence method for measuring sulfur

Images