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Coulomb sulfur tester

A technology of sulfur measurement and gas storage device, applied in the direction of electrochemical variables of materials, etc., can solve the problems of difficult sulfur content test range, inconsistent feedback, and lag in the electrolysis process, so as to widen the test range, avoid electrolysis lag, and ensure repeatability. sexual effect

Active Publication Date: 2016-04-20
HUNAN INST OF METROLOGY & TEST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing coulometric sulfur measuring device, the combusted gas is directly pumped into the electrolytic cell for electrolysis, and the SO in the gas pumped at this time is not considered. 2 The concentration of SO 2 The release is also different, and the feedback of each electrolysis will be inconsistent, so it is difficult to guarantee the repeatability of the test
In addition, when testing combustible substances with relatively high sulfur content, during the combustion process, the combustible substances burn rapidly and suddenly produce a large amount of SO 2 Gas, the electrolyte cannot dissolve excess SO in a short time 2 gas, will cause some SO 2 The gas is sucked away by the air pump without being oxidized, resulting in a low sulfur content in the measured sample; at the same time, due to the limitation of the upper limit of the electrolysis current, the electrolysis curve cannot reflect the electrolysis process after high sulfur release in real time, which will also lead to the electrolysis process. lag
In addition, due to the SO produced during combustion 2 A sudden increase at first, followed by a steep drop, will make it difficult for the electrolysis system to respond in time, resulting in over-electrolysis
For the above reasons, it is difficult to really break through the 10% sulfur content test range of most coulometric sulfur measuring devices in China.

Method used

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Experimental program
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Embodiment 1

[0020] see figure 2 , which is a schematic structural view of the coulometric sulfur measuring device of the present invention. A coulometric sulfur measurement device includes a pyrolysis unit 1 , a gas storage unit 2 , an electrolysis unit 3 and a subsequent processing unit 4 . The pyrolysis unit 1 is connected to the gas storage unit 2 through a pipeline, the gas storage unit 2 is connected to the electrolysis unit 3 through a pipeline, and the electrolysis unit 3 is connected to the subsequent processing unit 4 through a pipeline connect. The pyrolysis unit 1 transports the gas generated by decomposition to the gas storage unit 2; the gas storage unit 2 stores and dilutes the gas and transports it to the electrolysis unit 3; after the electrolysis unit 3 partially absorbs the gas , and then transport the remaining gas to the subsequent processing unit 4 .

[0021] The pyrolysis unit 1 includes a purification pipe 11 , a first air pump 12 , a first flow meter 13 and a h...

Embodiment 2

[0030] The structure of the coulometric sulfur measuring device in this embodiment is substantially the same as that in embodiment 1, the only difference being that the gas storage unit is different. see Figure 5 , which is a schematic structural diagram of the storage unit in Embodiment 2. The gas storage unit includes a gas storage device 21', a first ventilation branch 22', a flow stabilization device 23', a second ventilation branch 24' and a regulating valve 25'. The high temperature furnace is connected to the gas storage device 21' through the first ventilation branch 22', and the gas storage device 21' is connected to the electrolysis unit through the flow stabilization device 23'; meanwhile, the The high temperature furnace is also connected to the electrolysis unit through the second ventilation branch 24', and the regulating valve 25' is arranged in the second ventilation branch 24'. Part of the gas produced by the decomposition of the sample to be tested in the ...

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Abstract

The invention discloses a coulomb sulfur tester which comprises a high-temperature decomposing unit, a gas storage unit, an electrolysis unit and a subsequent treatment unit, wherein the high-temperature decomposing unit is connected with the gas storage unit through a pipeline; the gas storage unit is connected with the electrolysis unit through a pipeline; the electrolyte unit is connected with the subsequent treatment unit through a pipeline. According to the coulomb sulfur tester, the gas storage unit is additionally arranged on the conventional coulomb sulfur tester, so that gas generated by combusting decomposition in a high-temperature furnace can be stored first, and SO2 in the gas is led to the electrolysis unit after being uniformly diluted to smooth the electrolysis process in the electrolysis unit and avoid the problem that electrolysis titration is difficult to control due to non-uniform SO2 release. Efficient and safe electrolysis titration is realized, so that the repetitiveness of a test result on a test sample is guaranteed, the test range expansion can be facilitated, and the experiment accuracy is improved.

Description

technical field [0001] The invention relates to the measurement of sulfur content in combustible substances, in particular to a Coulomb sulfur measuring device. Background technique [0002] Sulfur is the most important harmful component in combustible substances such as coal and petroleum. When combustible substances are burned, sulfur is converted into sulfur oxides such as SO 2 and SO 3 The form is discharged into the air, causing air and environmental pollution. Therefore, the detection of sulfur content in combustible substances is the focus of attention of energy users and environmental monitors. Existing sulfur content testing methods mainly include Ischka method, infrared spectroscopy and coulometric titration. Among them, the Ischka method is a chemical reagent analysis method, which is complicated to operate and labor-intensive; the instrument cost of infrared spectroscopy is high; and from the perspective of comprehensive analysis of instrument cost, ease of op...

Claims

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Application Information

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IPC IPC(8): G01N27/44
CPCG01N27/44
Inventor 胡彪张勇罗建明莫晓山熊知明周四清
Owner HUNAN INST OF METROLOGY & TEST