Combustion analysis and measurement system and method

Abstract

The invention discloses a combustion analysis and measurement system and method, and the system comprises a combustion chamber which is internally provided with a crucible for placing a sample, and is provided with an igniter which is used for igniting the sample to generate combustion gas; the gas supply assembly is used for introducing oxygen into the combustion chamber; the stirring assembly is arranged in the combustion chamber and used for uniformly mixing gas in the combustion chamber; the detection gas channel is connected with the combustion chamber and used for outputting mixed gas, and a pressure controller is arranged on the detection gas channel and used for outputting the mixed gas with preset pressure; the testing assembly is connected with the detection gas channel, is used for receiving the mixed gas and is used for detecting the element content in the mixed gas. Compared with the prior art, the combustion analysis and measurement system and the combustion analysis and measurement method provided by the invention have the advantages that the equipment cost and the labor cost required by testing can be reduced, and the testing process is effectively simplified.

Description

Technical Field

[0001] The present application relates to the technical field of element content analysis in combustible materials, and more specifically, to a combustion analysis measurement system and method. Background Art

[0002] For combustible materials such as coal, ore, biomass, and medicines, it is necessary to test the constituent elements, calorific value, ash content, etc. of the samples. For example, for coal, it is necessary to quickly detect the calorific value, ash content, carbon, hydrogen, sulfur and other component indicators before it is burned in the furnace for power generation, so as to achieve the coal ratio before entering the furnace, ensure the maximum combustion calorific value efficiency of different coal ratios, control costs, increase power generation output, and ensure that tail gas emissions, combustion ash, and coking meet the requirements of regulations.

[0003] The elements that make up the organic matter of coal are mainly carbon, hydrogen, and sulfur. Among them, carbon and hydrogen are the main components of the organic matter of coal. Carbon and hydrogen are the elements that generate heat during the combustion of coal. Sulfur is a harmful component in coal. When coal is burned, most of the sulfur is oxidized into sulfur dioxide, which is discharged with the flue gas, polluting the atmosphere, endangering the growth of animals and plants, and human health. When sulfur-rich coal is used for metallurgical coking, it also affects the quality of coke and steel. Therefore, the content of carbon, hydrogen, and sulfur is an important indicator for evaluating the medium.

[0004] The sample detector in the prior art can only test a single component of the sample. Different analytical standard methods corresponding to different components and characteristics need to be tested by different laboratory test instruments, but the equipment cost and labor cost are expensive.

[0005] Therefore, there is an urgent need for a combustion analysis measurement system and method that can reduce the equipment cost and labor cost required for testing and effectively simplify the testing process. Summary of the invention

[0006] In order to solve the above technical problems, the present application provides a combustion analysis measurement system and method, which can reduce the equipment cost and labor cost required for testing and effectively simplify the testing process.

[0007] The technical solutions provided by this application are as follows: A combustion analysis measurement system, comprising: A combustion chamber, wherein a crucible for placing a sample is disposed in the combustion chamber, and an igniter is disposed on the combustion chamber, and the igniter is used to ignite the sample to generate combustion gas; a gas supply assembly for introducing oxygen into the combustion chamber; A detection gas channel connected to the combustion chamber and used for outputting the mixed gas, wherein the detection gas channel is provided with a first switch for controlling the on-off of the gas path; A pressure controller disposed on the detection gas channel; A test component connected to the detection gas channel and used to receive the mixed gas, wherein the test component is used to detect the element content in the mixed gas.

[0008] Preferably, the test component comprises: A carbon infrared cell for detecting the carbon content in the mixed gas; A sulfur infrared cell for detecting the sulfur content in the mixed gas; A hydrogen infrared cell for detecting the hydrogen content in the mixed gas; The carbon infrared cell, the sulfur infrared cell, the hydrogen infrared cell and the outlet of the detection gas channel are arranged in series or in parallel.

[0009] Preferably, it also includes: A gas purifier is arranged on the detection gas channel, and the gas purifier is arranged between the first switch and the test component.

[0010] Preferably, the carbon infrared cell, the sulfur infrared cell and the hydrogen infrared cell are arranged in series; Wherein, a tail switch is arranged at the gas path outlet of the test component; or, the test component further comprises a flow controller, and the flow controller is arranged in series with the detection gas channel.

[0011] Preferably, the test component comprises: A first test branch and a second test branch, wherein the first test branch and the second test branch are arranged in parallel, wherein a flow controller is arranged on the first test branch or a tail switch is arranged at the outlet of the first test branch, and a flow controller is arranged on the second test branch or a tail switch is arranged at the outlet of the second test branch.

[0012] Preferably, it also includes: a temperature control component; Wherein, the temperature control component is arranged outside the combustion chamber, and is used to perform constant temperature control on the combustion chamber; or, The temperature control component is arranged outside the test component and is used to perform constant temperature control on the test component; or, The temperature control component is arranged outside the test component and the combustion chamber.

[0013] Preferably, it also includes: A test channel for connecting the gas supply assembly with the detection gas channel, wherein an outlet of the test channel is arranged between the first switch and the test assembly; A second switch is provided on the test channel.

[0014] Preferably, the gas supply assembly comprises: a first intake passage communicating with the combustion chamber; an oxygen source in communication with the air inlet of the first air inlet passage; a pressure detector for detecting the gas pressure in the combustion chamber; A pressure regulating component is arranged on the first intake passage, and the pressure regulating component is connected to the pressure detector. According to the gas pressure of the combustion chamber detected by the pressure detector, the pressure regulating component regulates the intake flow of the first intake passage.

[0015] Preferably, the pressure regulating assembly comprises: a first solenoid valve disposed on the first air intake passage; a pressure regulator disposed between the first solenoid valve and the oxygen source; a second air intake passage, wherein an air intake port of the second air intake passage is arranged between the pressure regulator and the first solenoid valve, and an air outlet of the second air intake passage is arranged between the first solenoid valve and the combustion chamber; A second solenoid valve provided on the second air intake passage, the second solenoid valve being used to control the on-off of the second air intake passage; A throttle valve is arranged on the second air intake passage and connected in series with the second solenoid valve, and the throttle valve is used to control the gas flow on the second air intake passage.

[0016] Preferably, it also includes: an exhaust passage in communication with the combustion chamber; A third solenoid valve disposed on the exhaust passage and used to control the on-off of the exhaust passage; A suction member is communicated with the outlet of the exhaust passage and is used to extract the gas in the combustion chamber.

[0017] A method for combustion analysis measurement comprises the following steps: A sample of a preset weight is placed on a crucible, oxygen is introduced into the combustion chamber through a gas supply assembly until the gas pressure in the combustion chamber reaches a preset pressure value, and the sample is ignited by an igniter until it is fully burned; The gas in the combustion chamber is mixed evenly by the stirring component; Open the detection gas channel to output the mixed gas with preset pressure; The element content in the mixed gas is detected by the test component.

[0018] Preferably, the method further comprises the following steps: The process of introducing oxygen into the combustion chamber through the gas supply assembly until the gas pressure in the combustion chamber reaches a preset pressure value specifically comprises the following steps: Rapid oxygenation of the combustion chamber; When the pressure detector detects that the gas pressure in the combustion chamber is close to the preset pressure, air is slowly introduced into the combustion chamber until the gas pressure in the combustion chamber reaches the preset pressure value.

[0019] Preferably, after detecting the element content in the mixed gas by the test assembly, the following steps are further included: Open the exhaust passage to relieve the exhaust pressure in the combustion chamber; Purge the mixed gas inside the combustion chamber and clean the crucible.

[0020] The combustion analysis and measurement system provided by the present invention is firstly provided with a combustion chamber and a gas supply component, wherein a crucible is provided in the combustion chamber, the crucible is used to place samples, an igniter is provided on the combustion chamber, the igniter is used to ignite the samples to generate combustion gas, and a gas supply component is also provided, the gas supply component is used to introduce oxygen into the combustion chamber, and ignite through the igniter in a high-pressure oxygen-rich closed container to ensure that the samples can burn quickly and fully. Secondly, a detection gas channel and a test component are also provided, wherein the detection gas channel is used to be connected to the combustion chamber, the detection gas channel is used to output the mixed gas, a first switch is provided on the detection gas channel, the on and off of the gas is controlled by the first switch, when the sample is burning, the first switch is closed until the sample is fully burned, the first switch is opened, and the mixed gas in the combustion chamber enters the test component through the detection gas channel for detection, a pressure controller is provided on the detection gas channel, the detection gas channel is controlled by the pressure controller to output the mixed gas of the preset pressure, the test component is connected to the detection gas channel, the test component is used to receive the mixed gas of the preset pressure, the element content in the mixed gas is detected by the test component, the pressure entering the test component is controlled by the pressure controller, the stability of the flow control is improved, and the precision and accuracy of the detection and analysis results are guaranteed and improved. It can be seen that compared with the prior art, the combustion analysis measurement system in the embodiment of the present invention can reduce the equipment cost and labor cost required for the test, and effectively simplify the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a combustion analysis measurement system provided by an embodiment of the present invention; Figure 2 A schematic diagram of a first structure of a test component provided in an embodiment of the present invention; Figure 3 A second structural schematic diagram of a test component provided in an embodiment of the present invention; Figure 4 A third structural schematic diagram of a test component provided in an embodiment of the present invention; Figure 5 A fourth structural schematic diagram of a test component provided in an embodiment of the present invention; Figure 6 A schematic structural diagram of a gas path diagram of a combustion analysis and measurement system provided by an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a combustion chamber provided for an embodiment of the invention; Figure 8 A schematic diagram of the structure of a cover opening assembly provided in an embodiment of the present invention; Fig. 9 A schematic diagram of the structure of a furnace body provided by an embodiment of the present invention; Fig.10 A schematic diagram of the structure of a furnace cover provided by an embodiment of the present invention; Fig.11 A schematic diagram of the structure of a combustion chamber provided in an embodiment of the present invention; Fig.12 A schematic diagram of the structure of a connection assembly provided in an embodiment of the present invention (the second end of the locking rod is inserted into the locking groove); Fig.13 A schematic diagram of the structure of a connection assembly provided in an embodiment of the present invention (the second end of the locking rod is separated from the locking groove); Fig.14 A flow chart of a combustion analysis measurement method provided in an embodiment of the present invention.

[0023] Figure numerals: 1, combustion chamber; 2, crucible; 3, igniter; 5, temperature control assembly; 6, detection gas channel; 61, first switch; 62, pressure controller; 63, gas purifier; 7, test channel; 8, test assembly; 41, first air inlet channel; 42, oxygen source; 43, pressure detector; 44, pressure regulating assembly; 441, first solenoid valve; 442, pressure regulator; 443, second air inlet channel; 444, second solenoid valve; 445, throttle valve; 81, carbon infrared cell; 82, sulfur infrared cell; 83, hydrogen infrared cell; 84, flow controller; 85, tail switch; 86, control system; 91, exhaust channel; 92. The third solenoid valve; 93. The suction member; 11. The furnace body; 12. The furnace cover; 13. The sealing member; 14. The connecting assembly; 15. The driving assembly; 16. The opening assembly; 17. The stirring assembly; 18. The positioning plate; 141. The first boss; 142. The first groove; 143. The second groove; 144. The second boss; 146. The sliding groove; 147. The locking rod; 151. The furnace cover rotation driving mechanism; 152. The furnace cover fixing plate; 161. The furnace cover supporting plate; 162. The driving member; 163. The lifting seat; 164. The lifting connecting seat; 165. The lifting driving member; 166. The synchronous pulley; 167. The synchronous belt; 168. The slide rail. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0028] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0029] The embodiments of the present invention are written in a progressive manner.

[0030] like Figures 1 to 6 As shown, an embodiment of the present invention provides a combustion analysis and measurement system, including: a combustion chamber 1, a crucible 2 for placing a sample is arranged in the combustion chamber 1, an igniter 3 is arranged on the combustion chamber 1, and the igniter 3 is used to ignite the sample to generate combustion gas; a gas supply component for introducing oxygen into the combustion chamber 1; a detection gas channel 6 connected to the combustion chamber 1 and used to output a mixed gas, the detection gas channel 6 is provided with a first switch 61 for controlling the on-off of the gas path, and the detection gas channel 6 is provided with a pressure controller 62 for outputting a mixed gas of a preset pressure; a test component 8 connected to the detection gas channel 6 and used to receive the mixed gas, and the test component 8 is used to detect the element content in the mixed gas.

[0031] The sample detector in the prior art can only test a single component of the sample. Different analytical standard methods corresponding to different components and characteristics need to be tested by different laboratory test instruments, but the equipment cost and labor cost are expensive.

[0032] In the prior art, when a single sample needs to detect multiple composition values, it has the following disadvantages: 1. The instrument cost is high and the composition is complex; 2. When high-temperature burning and decomposition is required, a higher burning temperature is required and the waiting time for burning is long; 3. The test time is long and requires high-temperature burning decomposition and solution decomposition absorption and other decomposition processes. The decomposition time is long and the test process is complicated.

[0033] The combustion analysis and measurement system provided by the present invention is firstly provided with a combustion chamber 1 and a gas supply component, wherein a crucible 2 is provided in the combustion chamber 1, the crucible 2 is used to place the sample, an igniter 3 is provided on the combustion chamber 1, the igniter 3 is used to ignite the sample to generate combustion gas, and a gas supply component is also provided, the gas supply component is used to introduce oxygen into the combustion chamber 1, and ignite through the igniter 3 in a high-pressure oxygen-rich closed container to ensure that the sample can burn quickly and fully. Secondly, a detection gas channel 6 and a test assembly 8 are also provided, wherein the detection gas channel 6 is used to be connected to the combustion chamber 1, and the detection gas channel 6 is used to output the mixed gas. A first switch 61 is provided on the detection gas channel 6, and the on-off of the gas path is controlled by the first switch 61. When the sample is burning, the first switch 61 is closed until the sample is fully burned, and the first switch 61 is opened, and the mixed gas in the combustion chamber 1 enters the test assembly 8 through the detection gas channel 6 for detection. A pressure controller 62 is provided on the detection gas channel 6, and the detection gas channel 6 is controlled by the pressure controller 62 to output the mixed gas of the preset pressure. The test assembly 8 is connected to the detection gas channel 6, and the test assembly 8 is used to receive the mixed gas of the preset pressure, and the element content in the mixed gas is detected by the test assembly 8. The pressure controller 62 controls the pressure entering the test assembly 8, thereby improving the stability of the flow control, and ensuring and improving the precision and accuracy of the detection and analysis results. It can be seen that compared with the prior art, the combustion analysis measurement system in the embodiment of the present invention can reduce the equipment cost and labor cost required for the test, and effectively simplify the test process.

[0034] In the above system, firstly, the combustion chamber 1 in the embodiment of the present invention is specifically a sealed high-pressure resistant closed container. Ignition is performed in a high-pressure, oxygen-rich closed container so that the sample burns quickly, which can greatly increase the combustion speed; secondly, the element content in the mixed gas is detected by the test component 8, and a variety of combustion compositions and component values ​​can be tested through a single combustion. In addition, by directly testing the composition concentration of the mixed gas, the experimental data obtained are more accurate than the results of the non-destructive online testing method.

[0035] In the above system, as one of the implementation modes, the test component 8 in the embodiment of the present invention includes a carbon infrared cell 81, a sulfur infrared cell 82 and a hydrogen infrared cell 83, the carbon infrared cell 81 is used to detect the content of carbon element in the mixed gas, the sulfur infrared cell 82 is used to detect the content of sulfur element in the mixed gas, and the hydrogen infrared cell 83 is used to detect the content of hydrogen element in the mixed gas, wherein the carbon infrared cell 81, the sulfur infrared cell 82 and the hydrogen infrared cell 83 are arranged in series or in parallel with the outlet of the detection gas channel 6.

[0036] In the above system, as one of the implementation modes, the combustion analysis measurement system in the embodiment of the present invention also includes a gas purifier 63, which is arranged between the first switch and the test component. The gas purifier is used to remove impurities from the mixed gas entering the test component, and the test result is more accurate.

[0037] In the above system, the carbon infrared cell, the sulfur infrared cell and the hydrogen infrared cell are arranged in series; wherein a tail switch 85 is arranged at the gas path outlet of the test component; or, the test component further includes a flow controller, which is arranged at the gas path inlet or gas path outlet of the test component.

[0038] Specifically, as the first specific implementation method, please Figure 2 and Figure 3 As shown, the carbon infrared cell 81, the sulfur infrared cell 82 and the hydrogen infrared cell 83 are arranged in series to form a test module, and the test module is arranged in series with the detection gas channel 6, and the mixed gas of preset pressure enters the carbon infrared cell 81, the sulfur infrared cell 82 and the hydrogen infrared cell 83 in turn through the detection gas channel 6, and the content of carbon, sulfur and hydrogen elements is detected in turn. It should be noted that in this embodiment, there is no restriction on the order of the carbon infrared cell 81, the sulfur infrared cell 82 and the hydrogen infrared cell 83. The series setting is suitable for the case where the cells of different elements can be measured at the same pressure (concentration) with better results. The advantage is that the test results can be obtained with less combustion gas. And the structure and control are simple and the cost is low.

[0039] In the above structure, the outlet of the test assembly 8 in the embodiment of the present invention can adopt a closed structure or a flow test structure, such as Figure 3 As shown, a closed structure is adopted, that is, a tail switch 85 is set at the outlet of the test assembly 8. When the mixed gas is tested, the tail switch 85 is closed, and the concentration of the mixed gas is indirectly controlled by the pressure controller for measurement. A flow test structure is adopted, that is, a flow controller is set in the gas path of the test assembly 8, such as Figure 2 As shown, the pressure controller is used to adjust the air pressure in the test assembly, the flow controller is used to adjust the flow of the gas path through the test assembly, and the test assembly is used to detect the content of each element in the mixed gas. The flow controller is used to control the stability of the flow when the mixed gas enters the detection assembly, thereby ensuring and improving the precision and accuracy of the detection and analysis results. Compared with the closed test structure, the flow test structure has a larger test sample and higher data accuracy.

[0040] In addition, the test components can also be connected in parallel, such as Figure 4 and Figure 5As shown, the test component 8 includes: a first test branch and a second test branch, the first test branch and the second test branch are arranged in parallel, wherein the first test branch is provided with a flow controller or a tail switch 85 is provided at the outlet of the first test branch, and the second test branch is provided with a flow controller or a tail switch 85 is provided at the outlet of the second test branch.

[0041] As a second specific implementation method, the carbon infrared cell 81, the sulfur infrared cell 82 and the hydrogen infrared cell 83 in the embodiment of the present invention are arranged in parallel to form a test module, and the test module is arranged in series with the detection gas channel 6, and the mixed gas of preset pressure enters the carbon infrared cell 81, the sulfur infrared cell 82 and the hydrogen infrared cell 83 respectively to detect each element.

[0042] As a third specific implementation, the carbon infrared cell 81, the sulfur infrared cell 82 and the hydrogen infrared cell 83 in the embodiment of the present invention can be connected in parallel in any two types and in series with another type to form a test module, and the test module is connected to the detection gas channel 6.

[0043] In the above structure, the test modules in the embodiment of the present invention include but are not limited to the carbon infrared cell 81, the sulfur infrared cell 82 and the hydrogen infrared cell 83, and can also be installed in combination according to the purpose of the test.

[0044] The parallel setting is suitable for different elements of the measuring cell body need different test pressure (concentration) to achieve better test results. The advantage of the parallel setting is that by increasing the pressure (concentration) within the effective measurement concentration range of the measuring component, the measurement results can be obtained more quickly, and more accurate test results can be obtained by parallel independent setting of different elements. The disadvantage is that the multi-channel separate control results and costs are relatively high, and the gas consumption is large compared to a single channel.

[0045] A tail switch 85 can be set at the tail of the branch gas circuit arranged in parallel, and the concentration of the branch gas circuit can be indirectly changed by adjusting the pressure of the pressure controller, so as to obtain a better test structure; a flow controller can also be set in the branch gas circuit arranged in parallel, and a flow test structure is adopted through the flow controller, so that the test sample is larger and the data accuracy is higher.

[0046] In the above system, the test component 8 provided in the embodiment of the present invention also includes a control system 86, which is connected to the test module. The test module saves the test results into the control system 86, and performs data analysis and calculation through the control system 86 to obtain the test components and the content values ​​of the components.

[0047] Furthermore, as one of the preferred implementation modes, the combustion analysis and measurement system in the embodiment of the present invention also includes a temperature control component 5, wherein the temperature control component 5 can be arranged on the outside of the combustion chamber to perform constant temperature control on the combustion chamber to ensure that the combustion chamber is under a constant temperature state, thereby preventing the sample from generating water vapor that condenses in the combustion chamber during the combustion process, thereby ensuring the stability of the experimental results; or, the temperature control component is also arranged on the outside of the test component 8 to keep the test component 8 warm. The accuracy of the test element of the test component 8 is greatly affected by temperature. By setting the temperature control component 5, the accuracy of the test results can be ensured; or, the temperature control component can be arranged on the outside of the combustion chamber and the test component at the same time, which has a better effect.

[0048] In the above structure, as one of the implementation modes, the combustion analysis and measurement system in the embodiment of the present invention also includes a test channel 7, which is used to purge the test component to avoid residual gas in the test component. The test channel 7 is used to connect the gas supply component and the detection gas channel. The outlet of the test channel 7 is arranged between the first switch and the test component. A second switch is arranged on the test channel 7. When it is necessary to purge the test component, the first switch is closed and the second switch is opened, and oxygen is input into the test component through the gas supply component for purging. When it is necessary to test the mixed gas, the second switch is closed and the first switch is opened, and the mixed gas enters the test component through the detection gas channel for detection.

[0049] The process of purging the test component through the test channel 7 can be set after the test component completes the detection, and can also be set before the sample burns. Preferably, the process of purging the test component through the test channel 7 is set before the sample burns, and the test error is smaller.

[0050] In the above system, as one implementation method, Figure 6 As shown, the gas supply assembly in the embodiment of the present invention includes a first air intake channel 41, an oxygen source 42, a pressure detector 43 and a pressure regulating assembly 44, wherein the first air intake channel 41 is used to communicate with the combustion chamber 1, the oxygen source 42 is connected to the air inlet of the first air intake channel 41, the pressure detector 43 is used to detect the air pressure in the combustion chamber 1, and the pressure regulating assembly 44 is arranged on the first air intake channel 41. The pressure regulating assembly 44 is connected to the pressure detector 43. According to the gas in the combustion chamber 1 detected by the pressure detector 43, the pressure regulating assembly 44 adjusts the intake flow at the first air intake channel 41.

[0051] Specifically, when testing the content of the mixed gas, the more accurate the pressure control of the mixed gas in the combustion chamber 1 is, the more accurate the test result is, and vice versa, the accuracy is worse. By providing the pressure regulating component 44 and the pressure detector 43, the intake flow in the first intake passage 41 is regulated by the pressure regulating component 44 to ensure that the pressure of the mixed gas in the combustion chamber 1 is constant, and the test accuracy is higher.

[0052] Furthermore, as one of the preferred embodiments, the pressure regulating component 44 in the embodiment of the present invention includes a first solenoid valve 441 and a pressure regulator 442, wherein the first solenoid valve 441 is arranged on the first air intake channel 41, and the pressure regulator 442 is arranged between the first solenoid valve 441 and the oxygen source 42, the oxygen source 42 is used to provide oxygen to the combustion chamber 1 to ensure that the sample in the combustion chamber 1 is burned in an oxygen-rich environment, the pressure regulator 442 is arranged on the first air intake channel 41, and is used to adjust the initial air intake pressure of the oxygen source 42, and the first solenoid valve 441 is used to control the on-off of the first air intake channel 41. Secondly, a second air intake channel 443, a second solenoid valve 444 and a throttle valve 445 are also provided. The air intake of the second air intake channel 443 is arranged between the pressure regulating valve and the first solenoid valve 441, and the air outlet of the second air intake channel 443 is arranged between the first solenoid valve 441 and the combustion chamber 1. The second solenoid valve 444 is arranged on the second air intake channel 443. The second solenoid valve 444 is used to control the on-off of the second air intake channel 443. The throttle valve 445 is arranged on the second air intake channel 443, and the throttle valve 445 and the second solenoid valve 444 are arranged in series, and the gas flow on the second air intake channel 443 is controlled by the throttle valve 445.

[0053] Specifically, when oxygen needs to quickly enter the combustion chamber 1, as a first embodiment, the first solenoid valve 441 can be opened and the second solenoid valve 444 can be closed, and the oxygen in the oxygen source 42 can quickly enter the combustion chamber 1 through the first air intake channel 41; as a second embodiment, the first solenoid valve 441 and the second solenoid valve are opened at the same time, and the oxygen in the oxygen source 42 enters the combustion chamber 1 through the first air intake channel 41 and the second air intake channel 443.

[0054] When oxygen needs to slowly enter the combustion chamber 1 , the first battery valve can be closed and the second battery valve can be opened, and the flow rate of oxygen entering the combustion chamber 1 can be controlled by controlling the second solenoid valve 444 and the throttle valve 445 .

[0055] When rapid oxygen intake is required, the first solenoid valve 441 is opened or the first solenoid valve 441 and the second solenoid valve 444 are opened simultaneously to achieve rapid oxygen filling of the combustion chamber 1; when the pressure detector 43 detects that the gas pressure in the combustion chamber 1 is close to the preset pressure, the first solenoid valve 441 is closed and the second solenoid valve 444 is opened, and the intake flow rate is controlled from the throttle valve 445 to achieve slow intake.

[0056] The gas supply assembly in the embodiment of the present invention can intake air quickly or slowly, thereby ensuring the accuracy of the oxygen content in the combustion chamber 1.

[0057] In the above system, the combustion analysis and measurement system in the embodiment of the present invention also includes an exhaust channel 91, a third solenoid valve 92 and a suction piece 93, wherein the exhaust channel 91 is connected to the combustion chamber 1, the exhaust channel 91 is used to relieve the pressure in the combustion chamber 1, the third solenoid valve 92 is arranged on the exhaust channel 91, the third solenoid valve 92 is used to control the on and off of the exhaust channel 91, the suction piece 93 is connected to the outlet of the exhaust channel 91, the suction piece 93 is used to extract the gas in the combustion chamber 1, to ensure that the gas in the combustion chamber 1 is quickly exhausted, to avoid the residual exhaust gas after combustion, which causes the results of subsequent samples to exceed the tolerance.

[0058] Furthermore, the suction member 93 in the embodiment of the present invention is specifically an exhaust pump or a vacuum generator.

[0059] In the above system, as one of the implementation modes, a stirring component 17 is provided in the combustion chamber 1 in the embodiment of the present invention, and the gas in the combustion chamber 1 is mixed evenly by the stirring component 17, so as to ensure that the concentration of the gas in the combustion chamber 1 is consistent and the representativeness of the mixed gas is good, thereby avoiding errors in subsequent detection results. By adding the stirring component 17 in the combustion chamber 1 and increasing the fluidity of the gas in the combustion chamber 1 by the stirring component 17, the combustion efficiency of the sample can be improved and the mixing of the gas after combustion can be ensured to be even.

[0060] In the above system, if Figures 7 to 13 As shown, the combustion chamber 1 in the embodiment of the present invention includes a furnace body 11 and a furnace cover 12. A thread or a bayonet is provided between the furnace body and the furnace cover. The furnace body and the furnace cover are connected by the thread or the bayonet, and are sealed by a sealing ring between the furnace body and the furnace cover.

[0061] Furthermore, the furnace body and the furnace cover are made of high-pressure and oxidation-corrosion-resistant materials to prevent the sample from corroding and damaging the combustion chamber 1 when it burns rapidly.

[0062] In the above system, as one implementation mode, the igniter 3 in the embodiment of the present invention is aligned with the sample in the crucible 2, and the sample is ignited by the heat generated by the igniter 3.

[0063] As one specific implementation manner, the igniter 3 in the embodiment of the present invention is specifically an electrode igniter; or, the igniter in the embodiment of the present invention is specifically a laser igniter 3, and the laser igniter 3 is arranged outside the combustion furnace.

[0064] In the above system, as one specific implementation, the stirring component 17 in the embodiment of the present invention is specifically a stirring fan. Furthermore, at least one stirring fan is provided, and according to the needs of the test, multiple stirring fans can be provided, and the gas in the combustion chamber 1 is mixed evenly by the stirring fan.

[0065] In the above system, as one of the specific implementations, a fireproof baffle is provided above the stirring assembly 17 in the embodiment of the present invention, and the fireproof baffle is used to block the influence of the burning flame and heat of the sample on the stirring assembly 17.

[0066] In the above system, as one of the implementation modes, a bracket is provided in the combustion chamber 1 in the embodiment of the present invention, and a positioning surface for mounting the crucible 2 is provided on the bracket. The bracket is provided to place the crucible 2 and position the sample to be burned.

[0067] The combustion chamber of the present invention also includes a connecting component 14, a driving component 15 and a lid opening component 16. The connecting component 14 is arranged on the inner peripheral side of the opening of the furnace body 11 and the outer peripheral side of the furnace cover 12. The furnace cover 12 is used to open and close the opening of the furnace body 11. The driving component 15 is used to drive the furnace cover 12 and the furnace body 11 to rotate relative to each other, so that the furnace cover 12 and the furnace body 11 have a locked state and an unlocked state. When the furnace cover 12 and the furnace body 11 are in a locked state, the furnace cover 12 and the furnace body 11 are sealed and connected by the connecting component 14 to prevent the high-pressure environment inside the combustion chamber 1 from rushing open the furnace cover 12. When the furnace cover 12 and the furnace body 11 are in an unlocked state, the lid opening component 16 is used to separate the furnace cover 12 from the furnace body 11, so as to facilitate the sample transfer mechanism 7 to transfer the sample to be tested and the crucible 2.

[0068] Furthermore, as one of the embodiments, the combustion chamber in the embodiment of the present invention also includes a positioning plate 18 and a sealing member 13, wherein the positioning plate 18 is arranged on the inner side of the opening, and the positioning plate 18 is fixedly connected to the furnace body 11, and the positioning plate 18 is used to abut against the inner side surface of the furnace cover 12 to position the furnace cover 12, and the sealing member 13 is arranged between the positioning plate 18 and the furnace cover 12. When the furnace cover 12 is closed, the sealing member 13 is used to achieve the sealing of the combustion chamber 1.

[0069] Furthermore, as one implementation mode, the sealing member 13 in the embodiment of the present invention can be arranged on the furnace cover 12 or on the sealing plate. Preferably, the sealing member 13 is arranged on the sealing plate.

[0070] Furthermore, the sealing member 13 in the embodiment of the present invention is specifically a sealing ring.

[0071] In the above structure, the driving assembly 15 is used to drive the furnace cover 12 and the furnace body 11 to rotate relative to each other, so that the furnace cover 12 and the furnace body 11 have a locked state and an unlocked state.

[0072] As a first embodiment, the connecting component 14 in the embodiment of the present invention includes an internal thread and an external thread, wherein the internal thread is arranged on the inner peripheral side of the opening, and the external thread is arranged on the outer peripheral side of the furnace cover 12. The driving component 15 drives the furnace cover 12 and the furnace body 11 to rotate around a first direction, so that the furnace cover 12 and the furnace body 11 are fixedly connected. When the furnace cover 12 needs to be opened, the driving component 15 drives the furnace cover 12 and the furnace body 11 to rotate around a second direction, so that the furnace cover 12 and the furnace body 11 are separated.

[0073] As a second implementation method, Fig. 9 and Fig.10 As shown, the connection assembly 14 in the embodiment of the present invention includes a first boss 141, a first groove 142, a second boss 144 and a second groove 143, wherein the first boss 141 is arranged above the positioning plate 18, the first boss 141 is fixedly connected to the furnace body 11, the first boss 141 extends from the inner peripheral side of the opening toward the axial direction of the furnace body 11, a plurality of first bosses 141 are arranged, and the plurality of first bosses 141 are arranged at intervals around the inner peripheral side of the opening, and a first groove 142 is formed between adjacent first bosses 141, and a second groove 143 is arranged on the outer peripheral side of the furnace cover 12, and the second groove 143 is used in conjunction with the first boss 141, A second boss 144 is formed between two adjacent second grooves 143, and the second boss 144 is used in conjunction with the first groove 142. When the furnace body 11 and the furnace cover 12 are in a locked state, the second boss 144 is located between the first boss 141 and the positioning plate 18. The second boss 144 is limited by the first boss 141 and the positioning plate 18 to prevent the furnace cover 12 from being separated from the furnace body 11 due to the high temperature and high pressure environment in the combustion chamber 1. When the furnace body 11 and the furnace cover 12 are in a locked state, the second boss 144 is opposite to the first groove 142, and the first boss 141 is opposite to the second groove 143, so that the furnace cover 12 can be separated from the furnace body 11.

[0074] As a third implementation method, Fig.12 and Fig.13As shown, the connection assembly 14 in the embodiment of the present invention further includes a locking groove, a sliding groove 146 and a locking rod 147, wherein the locking groove is arranged on the outer peripheral side of the opening, and a plurality of locking grooves are arranged at intervals around the outer peripheral side of the opening, and the sliding groove 146 is arranged on the furnace cover 12, and the first end of the locking rod 147 is slidably connected to the sliding groove 146, and the second end of the locking rod 147 is used to be inserted into the locking groove, and when the first end of the locking rod 147 moves to the first side of the sliding groove 146, the second end of the locking rod 147 is separated from the locking groove (see Fig.13 ), when the second end of the locking rod 147 moves to the second side of the sliding groove 146, the second end of the locking rod 147 is inserted into the locking groove (see Fig.12 ), the furnace cover 12 and the furnace body 11 rotate relative to each other, so that the locking rod 147 slides from the first side of the locking groove to the second side of the locking groove.

[0075] In the above structure, as one embodiment, the driving component 15 in the embodiment of the present invention can directly drive the furnace cover to rotate. As another embodiment, the driving component in the embodiment of the present invention includes a furnace cover rotation driving mechanism 151 and a furnace cover fixing plate 152. The furnace cover fixing plate 152 is used to be fixedly connected to the center of the furnace cover 12. The furnace cover fixing plate 152 is connected to the furnace cover rotation driving mechanism 151, and the furnace cover rotation driving mechanism 151 drives the furnace cover 12 fixing plate to rotate.

[0076] In the above device, when the furnace cover 12 is in the unlocked state, the cover opening assembly 16 separates the furnace cover 12 from the furnace body 11. As a first embodiment, please refer to Figure 8 As shown, the cover opening assembly 16 in the embodiment of the present invention is used to drive the furnace cover 12 to move along the axial direction of the furnace body 11, so that the furnace cover 12 is separated from the furnace body 11. The first cover opening assembly 16 provided in the embodiment of the present invention is mainly applicable to the vertical combustion chamber 1.

[0077] As one of the embodiments, the cover opening assembly 16 in the embodiment of the present invention includes: a lifting seat 163, a screw installed on the lifting seat 163, a screw nut connected to the screw transmission, the screw nut is connected to the lifting connection seat 164, the lifting connection seat 164 is connected to the furnace cover 12, and a lifting drive assembly that drives the screw to rotate. The lifting drive assembly drives the screw to rotate, thereby driving the screw nut and the lifting connection seat 164 to move in the direction in which the screw extends, thereby driving the furnace cover 12 to open and close.

[0078] Furthermore, the lifting drive assembly in the embodiment of the present invention includes a lifting drive member 165, a synchronous pulley 166 and a synchronous belt 167. The lifting drive member 165 is connected to the lead screw through the synchronous pulley 166 and the synchronous belt 167 to drive the lead screw to rotate.

[0079] Furthermore, the lifting drive member is preferably a drive motor.

[0080] Furthermore, the lifting connection seat 164 is connected to the lifting seat 163 via a slide rail 168 for guiding the lifting connection seat 164 .

[0081] As a second implementation method, Fig.11 As shown, the cover opening assembly 16 in the embodiment of the present invention includes a furnace cover support plate 161, a rotating shaft and a driving member 162, wherein the furnace cover support plate 161 is arranged on the outer side of the furnace cover, and the furnace cover support plate 161 is rotatably connected to one side of the furnace body 11 through the rotating shaft, and the driving assembly 15 is installed on the furnace cover support plate 161, and the output shaft of the driving assembly 15 is connected to the furnace cover 12. The driving assembly 15 is used to drive the furnace cover 12 to rotate around the axis direction of the furnace body 11, and the telescopic rod of the driving member 162 is used to be connected to the furnace cover support plate 161, and the driving member 162 is used to push the furnace cover support plate 161 to rotate around the rotating shaft, so that the furnace cover is separated from the furnace body 11. This cover opening assembly 16 can be used in a horizontal combustion chamber 1.

[0082] Furthermore, the driving member 162 in the embodiment of the present invention is specifically a cylinder, a hydraulic cylinder or a linear motor.

[0083] Furthermore, the driving assembly 15 in the embodiment of the present invention is preferably a rotary motor, and the rotary motor is used to drive the furnace cover 12 to rotate around the axis direction of the furnace body 11.

[0084] Please Fig.14 As shown, the present invention also provides a method for combustion analysis measurement, comprising the following steps: A sample of a preset weight is placed on the crucible 2, oxygen is introduced into the combustion chamber 1 through the gas supply assembly until the gas pressure in the combustion chamber 1 reaches a preset pressure value, and the sample is ignited by the igniter 3 until it is fully burned; Specifically, a representative combustible sample is weighed and added to the crucible 2, the combustion chamber 1 is closed, oxygen is introduced into the combustion chamber 1 through the gas supply assembly until the gas pressure in the combustion chamber 1 reaches a preset pressure value, and the sample is ignited and burned by the igniter 3 until the sample is fully burned.

[0085] The gas in the combustion chamber 1 is mixed uniformly by the stirring assembly 17; Specifically, when the sample is fully burned, the stirring component 17 is turned on to make the gas in the combustion chamber 1 evenly mixed. The stirring component 17 increases the fluidity of the gas in the combustion chamber 1, which can improve the combustion efficiency of the sample and ensure that the gas after combustion is evenly mixed.

[0086] Open the detection gas channel 6 to output the mixed gas at a preset pressure; When the gases are evenly mixed, the detection gas channel 6 is opened to output the mixed gas of preset pressure, and the pressure entering the test component 8 is controlled by the pressure controller 62 to improve the stability of flow control, thereby ensuring and improving the precision and accuracy of the detection and analysis results.

[0087] By detecting the element content in the mixed gas through the test component 8, multiple combustion compositions and component values ​​can be tested through a single combustion. In addition, by directly testing the composition concentration of the mixed gas, the experimental data obtained is more accurate than the results of the non-destructive online testing method.

[0088] In the above method, as one specific implementation, the method of introducing oxygen into the combustion chamber 1 through the gas supply assembly until the gas pressure in the combustion chamber 1 reaches a preset pressure value specifically includes the following steps: rapidly oxygenating the combustion chamber 1; When the pressure detector 43 detects that the gas pressure in the combustion chamber 1 is close to the preset pressure, air is slowly introduced into the combustion chamber 1 until the gas pressure in the combustion chamber 1 reaches the preset pressure value.

[0089] Specifically, for rapid oxygenation of the combustion chamber 1, the first solenoid valve 441 can be opened, or the first solenoid valve 441 and the second solenoid valve 444 can be opened simultaneously to realize rapid oxygenation of the combustion chamber 1. For slow air intake into the combustion chamber 1, the first solenoid valve 441 can be closed and the second solenoid valve 444 can be opened, and the air intake flow rate can be controlled from the throttle valve 445 to realize slow air intake until the air pressure in the combustion chamber 1 reaches a preset pressure value. Such an arrangement ensures that the volume of oxygen filled into the combustion chamber 1 before combustion is consistent. In this way, with the same weight of sample, the concentration of the mixed gas after combustion can be more consistent, thereby improving the accuracy of the test.

[0090] In the above method, as one implementation mode, in the combustion analysis measurement method in the embodiment of the present invention, the element content in the mixed gas is detected by the test component 8, and then the following steps are further included: Open the exhaust passage 91 to release the exhaust pressure from the combustion chamber 1; Specifically, the third solenoid valve 92 and the suction piece 93 are opened to extract the gas in the combustion chamber 1, thereby ensuring that the gas in the combustion chamber 1 is quickly exhausted, thereby avoiding the residual exhaust gas after combustion, which may cause the results of subsequent samples to exceed the tolerance.

[0091] The mixed gas inside the combustion chamber 1 is purged and the crucible 2 is cleaned.

[0092] Specifically, the furnace cover and the stirring assembly 17 are opened, the residual mixed gas inside the combustion chamber 1 is cleared, and the crucible 2 is cleaned to prepare for the next test.

[0093] Furthermore, as one implementation mode, the combustion analysis measurement method in the embodiment of the present invention also includes the following steps: purging the detection gas channel 6 and the test component 8 during the non-mixed gas detection process time period.

[0094] Specifically, the detection gas channel 6 and the test component 8 can be purged and cleaned after the test component 8 is tested, or before the test component 8 is tested. Preferably, the detection gas channel 6 and the test component 8 are purged and cleaned before the test component 8 is tested.

[0095] Furthermore, as one of the implementation modes, the first air intake channel 41, the exhaust channel 91 and the detection air channel 6 can be a vent that is then branched, with valves used to distinguish between intake, exhaust or measurement, or there can be multiple vents that are respectively connected to the first air intake channel 41, the exhaust channel 91 and the detection air channel 6.

[0096] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A combustion analysis measurement system, characterized in that: include: A combustion chamber (1), wherein a crucible (2) for placing a sample is arranged in the combustion chamber (1), and an igniter (3) is arranged on the combustion chamber (1), and the igniter (3) is used to ignite the sample to generate combustion gas; a gas supply assembly for introducing oxygen into the combustion chamber (1); A detection gas channel (6) connected to the combustion chamber (1) and used for outputting the mixed gas, wherein the detection gas channel is provided with a first switch (61) for controlling the on-off of the gas path; A pressure controller (62) disposed on the detection gas channel (6); A test component (8) connected to the detection gas channel (6) and used to receive the mixed gas, wherein the test component (8) is used to detect the element content in the mixed gas.

2. The combustion analysis measurement system according to claim 1, characterized in that: The test component (8) comprises: A carbon infrared cell (81) for detecting the carbon content in the mixed gas; A sulfur infrared cell (82) for detecting the sulfur content in the mixed gas; A hydrogen infrared cell (83) for detecting the hydrogen content in the mixed gas; The carbon infrared cell (81), the sulfur infrared cell (82), and the hydrogen infrared cell (83) are arranged in series or in parallel with the outlet of the detection gas channel (6).

3. The combustion analysis measurement system according to claim 2, characterized in that: Also includes: A gas purifier (63) is arranged on the detection gas channel (6), and the gas purifier (63) is arranged between the first switch (61) and the test component (8).

4. The combustion analysis measurement system according to claim 3, characterized in that: The carbon infrared cell (81), the sulfur infrared cell (82), and the hydrogen infrared cell (83) are arranged in series; in, A tail switch (85) is provided at the gas path outlet of the test component (8); or, the test component (8) further comprises a flow controller (84), and the flow controller (84) is arranged in series with the detection gas channel (6).

5. The combustion analysis measurement system according to claim 3, characterized in that: The test component (8) comprises: A first test branch and a second test branch, wherein the first test branch and the second test branch are arranged in parallel; in, The first test branch is provided with a flow controller (84) or a tail switch (85) is provided at the outlet of the first test branch, and the second test branch is provided with a flow controller (84) or a tail switch (85) is provided at the outlet of the second test branch.

6. The combustion analysis measurement system according to claim 2, characterized in that: Also included: a temperature control component (5); Wherein, the temperature control component (5) is arranged outside the combustion chamber (1) and is used to perform constant temperature control on the combustion chamber (1); or, The temperature control component (5) is arranged outside the test component (8) and is used to perform constant temperature control on the test component (8); or, The temperature control component (5) is arranged outside the test component (8) and the combustion chamber (1).

7. The combustion analysis measurement system according to claim 2, characterized in that: Also includes: a test channel (7) for connecting the gas supply component with the detection gas channel (6), wherein an outlet of the test channel (7) is arranged between the first switch (61) and the test component (8); A second switch is arranged on the test channel (7).

8. The combustion analysis measurement system according to any one of claims 1 to 7, characterized in that: The gas supply assembly comprises: A first air intake passage (41) communicating with the combustion chamber (1); an oxygen source (42) connected to the air inlet of the first air inlet passage (41); A pressure detector (43) for detecting the gas pressure in the combustion chamber (1); A pressure regulating component (44) is arranged on the first air intake passage (41), the pressure regulating component (44) is connected to the pressure detector (43), and the pressure regulating component (44) regulates the air intake flow rate of the first air intake passage (41) according to the gas pressure of the combustion chamber (1) detected by the pressure detector (43).

9. The combustion analysis measurement system according to claim 8, characterized in that: The pressure regulating assembly (44) comprises: a first solenoid valve (441) disposed on the first air intake passage (41); a pressure regulator (442) disposed between the first solenoid valve (441) and the oxygen source (42); a second air intake passage (443), wherein an air intake port of the second air intake passage (443) is arranged between the pressure regulator (442) and the first solenoid valve (441), and an air outlet of the second air intake passage (443) is arranged between the first solenoid valve (441) and the combustion chamber (1); a second solenoid valve (444) disposed on the second air intake passage (443), the second solenoid valve (444) being used to control the on / off of the second air intake passage (443); A throttle valve (445) is arranged on the second air intake passage (443) and is connected in series with the second solenoid valve (444), wherein the throttle valve (445) is used to control the gas flow on the second air intake passage (443).

10. The combustion analysis measurement system according to any one of claims 1 to 7 and 9, characterized in that: Also includes: an exhaust passage (91) in communication with the combustion chamber (1); A third solenoid valve (92) disposed on the exhaust passage (91) and used to control the on-off state of the exhaust passage (91); A suction piece (93) is communicated with the outlet of the exhaust passage (91) and is used to extract gas from the combustion chamber (1).

11. A method for combustion analysis measurement, characterized in that: The following steps are involved: A sample of a preset weight is placed on a crucible, oxygen is introduced into the combustion chamber through a gas supply assembly until the gas pressure in the combustion chamber reaches a preset pressure value, and the sample is ignited by an igniter until it is fully burned; The gas in the combustion chamber is mixed evenly by the stirring component; Open the detection gas channel to output the mixed gas with preset pressure; The element content in the mixed gas is detected by the test component.

12. The method according to claim 11, characterized in that The following steps are also included: The process of introducing oxygen into the combustion chamber through the gas supply assembly until the gas pressure in the combustion chamber reaches a preset pressure value specifically comprises the following steps: Rapid oxygenation of the combustion chamber; When the pressure detector detects that the gas pressure in the combustion chamber is close to the preset pressure, air is slowly introduced into the combustion chamber until the gas pressure in the combustion chamber reaches the preset pressure value.

13. The method according to claim 12, characterized in that After testing the element content in the mixed gas through the test assembly, the following steps are also included: Open the exhaust passage to relieve the exhaust pressure in the combustion chamber; Purge the mixed gas inside the combustion chamber and clean the crucible.

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