Capacity fixed and loop closed cyclic gas analyzing method and device for surlfur determiner for circular titration
A technology of closed-circuit circulation and analysis method, which is applied in the direction of measuring devices, chemical analysis by combustion, and material analysis, etc. It can solve the problem of high sensor head and airflow stability requirements, uneven time distribution of gas concentration, and sensitive sensor head. High performance requirements and other issues, to achieve the effect of reducing sensitivity requirements, uniform gas concentration, and reducing production costs
Inactive Publication Date: 2007-01-17
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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[0017] The applicant has found through research that the existing Coulomb method uses the measurement method of extracting gas while burning the sample. Since the flow of the gas adopts an open circuit, the concentration of the gas will be very uneven, which will cause the instability of the test. . The invention makes the combusted gas circulate in a closed circuit, and then controls the direction of the gas in the circuit by setting a control valve, which can solve the problem of uneven gas concentration during the test, and only a small volume of gas is extracted during the measurement. That is, at the same time, in order to ensure the measurement of the gas with high sulfur content, another branch pipeline is set in the circulation loop, so that the gas that is too late to be titrated can be returned to the gas chamber, and then titrated, which can further ensure the accuracy of the test , thereby realizing the technical effect to be achieved by the present invention.
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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 sampling a sample using a closed loop method and analyzing it through a sulfur analyzer capable of cyclic titration and a device designed by the method , mainly used in coal, petroleum, chemical industry, electric power, scientific research, teaching and other industries or departments. Background technique: [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 elec...
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IPC IPC(8): G01N27/413G01N31/12
Inventor 朱先德
Owner SANDE IND CHANGSHA