Sulfur-nitrogen crystalline silica cracking tube

Abstract

The invention discloses a sulphur nitrogen quartz cracking tube used for an analyzing instrument which uses a cracking method to detect the contents of the sulphur nitrogen elements in a sample; the middle section of the cracking tube is a combustion cavity; the two ends are respectively a gasification end and a stable end; the inside of the gasification end is provided with a gasification cavity which is communicated with a gas loading opening; the inner wall of the gasification end and the outer wall of the gasification cavity are provided with a bent gas loading pre-heating tube; one end of the pre-heating tube is communicated with the gasification cavity and the other end is communicated with the gas loading opening. When the sulphur nitrogen quartz cracking tube works, the loaded gas enters the preheating tube at first and then enters the gasification cavity; the temperature of the loaded gas after preheating achieves the requirement of complete gasification of the sample, thereby avoiding the problems of leading the sample to generate carbon distribution or residua due to the lower temperature of the loaded gas, thereby improving the detection accuracy.

Description

technical field [0001] The invention relates to a sulfur-nitrogen quartz cracking tube, which is applied to a class of analytical instruments for measuring the content of sulfur and nitrogen elements in a sample by using a cracking method. Background technique [0002] When analyzing and determining the content of sulfur and nitrogen elements in petroleum and petroleum derivatives, the sample needs to be completely burned and cracked with a certain gas under high temperature cracking to generate a gaseous substance, and then enter the detection room for analysis and determination, which requires a high temperature Combustion device Quartz pyrolysis tube. The structure of the existing quartz cracking tube is that the middle is the combustion chamber, and the two ends are respectively the gasification end and the stable end. The gas port, the gas-supporting gas inlet, and the carrier gas inlet directly communicate with the gasification chamber. Such a structure has the follo...

AI Technical Summary

Problems solved by technology

Such a structure has the following disadvantages: the carrier gas directly enters the gasification chamber without preheating, which reduces the temperature around the sample, so that the sample cannot be completely gasified and enters the combustion chamber, resulting in carbon deposits or sample residues on the wall of the gasification chamber, which affects the accuracy of the test results

Images