High-capacity quartz combustion tube for oil product analysis

Abstract

The invention relates to a high-capacity quartz combustion tube for oil product analysis. The high-capacity quartz combustion tube is characterized by being provided with two combustion chambers, wherein a spiral carrier gas preheating tube and an oxygen preheating tube are arranged inside the first combustion chamber; a spiral combustion-supporting tube is arranged inside the second combustion chamber; the two adjacent combustion chambers are spaced by a partition plate with a through hole; a blowback oxygen inlet is formed at the outlet end of the combustion tube. The quartz combustion tube is mainly used for measuring the contents of total sulfur, total nitrogen and total chlorine in petrochemical products; conventional sample amount of 10-20 microlitres in oil product analysis is prominently improved by 5-10 times so as to be up to 100 microlitres, and carbon deposition is not caused, so that a measurement signal is relatively enhanced, and the low-content total sulfur, total nitrogen total sulfur and total chlorine detection sensitivity is prominently improved; the lower limit of detection is 0.05mg / L, and the detection limit is as low as 0.01mg / L.

Description

technical field [0001] The invention relates to a high-capacity quartz combustion tube for oil product analysis, which is used for the analysis and testing of total sulfur, total nitrogen and total chlorine content in light oil products, and belongs to the technical field of petrochemical analysis. Background technique [0002] During the production, storage, transportation and use of products in the petrochemical industry, the existence of sulfur, chlorine and nitrogen elements in various oil chemicals can cause corrosion of production equipment, catalyst poisoning, poor stability of oil chemicals, and raw chemicals. The detection of sulfur, chlorine and nitrogen in the above-mentioned products has become the most important and common analysis item in the current petrochemical industry. [0003] At present, the determination of total sulfur, total nitrogen and total chlorine content in various petroleum products mainly adopts ultraviolet fluorescence method, chemiluminescen...

AI Technical Summary

Problems solved by technology

The quartz combustion tubes currently used in the market generally have the problems of short residence time of the sample in the combustion tube and small injection volume. Generally, the injection volume is 10-20 microliters. If the injection volume is slightly larger, it is easy to cause incomplete combustion. Carbon deposits are formed, which will cause optical path pollution, sample chamber pollution, detector pollution, and electrolytic cell pollution. It is very troublesome to deal with. When the carbon deposit is serious, the instrument may even fail to operate and be scrapped directly.

Due to the influence of carbon deposits, the improvement of the injection volume is directly limited, thereby limiting the further improvement of the precision, accuracy, lower detection limit and detection limit of the method when detecting the content of total sulfur, total nitrogen and total chlorine

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