[0022] The core of the present invention is to provide an elemental analysis system. The elemental analysis system divides the combustion-supporting gas into two working paths, one of which is purified to obtain an accurate blank value, and the other path is involved in combustion to obtain a test voltage value. Through this structural design, The influence of water vapor and carbon dioxide gas in the combustion-supporting gas on the test results can be avoided, and the reliability of the element determination results is improved.
[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0024] Please refer to figure 1 , figure 1 It is a schematic structural diagram of an elemental analysis system in an embodiment of the present invention.
[0025] The invention provides an elemental analysis system, which is used to measure the elemental composition of substances, including a combustion assembly for pre-combustion treatment of the substance to be tested and an analysis assembly for elemental analysis. The combustion assembly includes A connected gas source 1, a furnace 2, and a gas mixing tank 3, and the gas mixing tank 3 communicates with the gas circuit of the analysis component.
[0026] The analysis component adopts an infrared element analysis device, and the principle of element analysis of the infrared element analysis device adopts the Lambert-Beer law, which can measure carbon dioxide, the combustion product of carbon element, and water, the combustion product of hydrogen element.
[0027] The combustion component can burn the substance to be tested, and the combustion products generated during the combustion process can be analyzed to determine the constituent elements of the substance to be tested.
[0028] The combustion assembly specifically includes a gas source 1, a furnace 2 and a gas mixing tank 3. The gas source 1 can provide combustion-supporting gas to ensure that the substance to be tested is fully burned; the furnace 2 can provide a combustion place for the combustion of the substance to be tested; the gas mixing tank 3 uses The test gas produced when the substance to be tested is burned. The gas mixing tank 3 communicates with the gas path of the analysis component, and can deliver the test gas to the analysis component, so as to measure the elemental composition in the substance to be tested.
[0029] The element analysis system provided by the present invention also includes a background gas processing assembly and a communication valve 5. The background gas processing assembly includes a purification pipe 4 capable of removing water vapor and carbon dioxide gas. The purification pipe 4 communicates with the gas source 1 and communicates with the analysis valve 5. The components are air-path connected.
[0030] Background The gas processing component is equipped with a purification pipe 4, which can quickly purify the combustion-supporting gas provided by the gas source 1 to obtain purified combustion-supporting gas, and avoid the occurrence of water vapor and carbon dioxide gas in the combustion-supporting gas.
[0031] The purification pipe 4 communicates with the gas source 1, and communicates with the gas path of the analysis component through the connection valve 5. Before testing the test gas, the analysis component is always in the purging environment for purifying the combustion-supporting gas to obtain a blank voltage value.
[0032] The elemental analysis system provided by the present invention adopts the same gas source 1, and through its structural design, the combustion-supporting gas is divided into two channels of gas, one of which is purified by the purification pipe 4, and the purified gas passes through the detection unit to obtain a blank voltage value; the other channel of combustion-supporting gas participates in Combustion to form a test gas, the test gas passes through the detection unit to obtain a measurement voltage, so that the response value of the blank test can be obtained, and the reliability of the test result is improved.
[0033] Specifically, the communication valve 5 is a six-way quantitative valve, and the six-way quantitative valve has a first gas path and a second gas path, and both the first gas path and the second gas path are connected with the analysis component before and after the quantitative valve is switched; 3 communicates with the analysis component through the first gas path, and the purification pipe 4 communicates with the analysis component through the second gas path.
[0034] The first gas path and the second gas path can be switched, and can be respectively connected to the purification tube 4-analysis component gas path or the gas mixing tank 3-analysis component gas path to obtain blank voltage values and measurement voltages.
[0035]Specifically, in this embodiment, the elemental analysis system further includes a quantitative loop 6 , the quantitative loop 6 communicates with the gas mixing tank 3 , and the gas mixing tank 3 communicates with the first gas path through the quantitative loop 6 . The volume of the quantitative loop 6 is small, and the quantitative loop 6 is connected with the gas mixing tank 3. The gas in the gas mixing tank 3 can be stored in the quantitative loop 6. After the first gas path is connected, the gas in the quantitative loop 6 enters the analysis components. This structural design can obtain the measurement voltage containing moisture and carbon dioxide. Due to the small volume of the quantitative loop 6, it can greatly reduce the dust brought into the test gas, and avoid the problem of rapid contamination of the analysis components.
[0036] In the present invention, a filter 7 with gas purification function is also arranged between the furnace 2 and the gas mixing tank 3 . The ashes produced when the filter 7 is set to burn the substance to be measured? to filter. The setting of the filter 7 can effectively reduce the occurrence of dust entering into the analysis component, so that the pollution of the analysis component can be avoided, and the reliability of the test result can be improved (avoiding the influence of dust on the infrared test).
[0037] Specifically, the elemental analysis system further includes a pressure stabilizing valve, and the purge pipe 4 is in air communication with the communication valve 5 through the stabilizing valve.
[0038] Regulator valve (also known as decompression and regulator valve), the decompression valve is used to control the opening of the opening and closing parts in the valve body to adjust the flow of the medium, reduce the pressure of the medium, and at the same time adjust the opening and closing with the help of the pressure behind the valve The opening of the parts keeps the pressure behind the valve within a certain range. In the case of constant changes in the inlet pressure, the outlet pressure is kept within the set range to protect subsequent living and production appliances.
[0039] Equipped with a pressure stabilizing valve, the purified combustion-supporting gas can be stably blown into the analysis component, avoiding the unstable measurement of the blank voltage value caused by the unstable air flow.
[0040] An elemental analysis system provided by the present invention has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
