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Capacity fixed and loop closed cyclic gas analyzing method and device for surlfur determiner for circular titration

A closed-loop, gas analysis technology, used in measurement devices, analytical materials, chemical analysis using combustion, etc., can solve the problem of high requirements for sensor probe and airflow stability, uneven gas concentration time distribution, and sensitive sensor probes. It can reduce the sensitivity requirements, the gas concentration is uniform, and the production cost can be reduced.

Inactive Publication Date: 2005-02-23
SANDE IND CHANGSHA
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Problems solved by technology

[0002] At present, the sulfur determination instrument in the prior art adopts the coulometric method to measure the sulfur content in the sample, and the sulfur dioxide gas produced after the sample is burned in the reaction furnace first enters the filter through the pipeline connected to the inner cavity of the reaction furnace. Filtrate, then titrate in the electrolytic cell, and measure the sulfur content in the sample according to the electricity consumed by the electrogenerated iodine and electrobromine. During the test, the method of extracting gas while burning is used. The gas needs to be extracted continuously, and the time distribution of the gas concentration is very uneven. Therefore, when the gas concentration is low, the sensitivity of the sensor probe is high, and it is difficult to perform accurate measurement.
This method has high requirements on the sensor probe and airflow stability, otherwise it will affect the accuracy of measurement

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  • Capacity fixed and loop closed cyclic gas analyzing method and device for surlfur determiner for circular titration
  • Capacity fixed and loop closed cyclic gas analyzing method and device for surlfur determiner for circular titration

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Embodiment Construction

[0017] The applicant has discovered through research that the existing coulometric method uses the measurement method of extracting gas while burning the sample. Since the gas flow uses an open circuit, the gas concentration will be very uneven, which will cause the test to be unstable . The invention solves the problem of uneven gas concentration during the test by making the combusted gas flow in a closed loop, and then by setting the control valve to control the gas direction in the loop, and only extracting less volume of gas during the test That is, at the same time, in order to ensure the measurement of gases with higher sulfur content, another branch pipeline is set in the circulation loop to return the gas that is too late to titrate to the gas chamber and then perform titration, which can further ensure the accuracy of the test Therefore, the technical effect to be achieved by the present invention is realized.

[0018] The specific method of the present invention is as f...

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Abstract

An analysing device and method is featured as setting gas chamber, filter, measuring electrolytic pool and gas pump in sequence on piping connected to sample reactor to form a closed loop, setting another connecting pipe being controlled by control unit to open gas valve and pump for making gas circulate in each pipe and gas chamber; drawing off gas of fixed valume from closed loop and carrying on ratio conversion for finalizing sulphur content detection in sample.

Description

Technical field: [0001] The present invention relates to a method for measuring the sulfur content of solid or liquid combustible substances, in particular to a method for extracting samples for analysis using a closed loop method and a device designed by the method, which are mainly used in coal, petroleum, and chemical industries. , Power, scientific research, teaching and other industries or departments. Background technique: [0002] At present, the sulfur analyzer in the prior art uses the coulometric method to determine the sulfur content in the sample. The sulfur dioxide gas generated after the sample is burned in the reaction furnace enters the filter first through the pipeline connected to the inner cavity of the reaction furnace Filter, then titrate in the electrolytic cell, and determine the sulfur content in the sample according to the electricity consumed by the electro-generated iodine and electro-generated bromine. The method of extracting gas while burning is used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/413G01N31/12
Inventor 朱先德
Owner SANDE IND CHANGSHA
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