Liquid propellant laser heating reaction device for mass spectrum online sampling detection

Abstract

The invention relates to the technical field of mass spectrometry, in particular to a liquid propellant laser heating reaction device for mass spectrometry online sampling detection. The device comprises a frame, a propellant sample injector, a mass spectrometer sampling cone and a reaction table cylinder, the reaction table cylinder vertically penetrates through the bottom face of the frame, a high-temperature heat accumulator is installed at the upper end of the reaction table cylinder, and the sample injection end of the propellant sample injector and the sampling end of the mass spectrometer sampling cone both correspond to a laser heating area on the high-temperature heat accumulator. The laser heater emits laser to the high-temperature heat accumulator, so that a laser spot area on the high-temperature heat accumulator forms a high-temperature reaction micro-area at high temperature, the high-temperature reaction micro-area is quickly introduced before the physical and chemical states of the liquid propellant are changed, and the sampling end of the mass spectrum sampling cone directly extends into the high-temperature reaction micro-area; and effective online sampling and rapid detection of intermediate products in the reaction process are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mass spectrometry, in particular to a liquid propellant laser heating reaction device for online sampling and detection of mass spectrometry. BACKGROUND

[0002] Liquid propellant, as a special kind of high-energy chemical substance, is a key core material for aerospace equipment. It can chemically react in the engine to produce high-temperature and high-pressure gas, convert chemical energy into heat and kinetic energy, and form a certain thrust to drive the target aircraft to complete the intended action. In recent years, green liquid propellant has become an important direction and inevitable trend of aerospace power development to replace traditional toxic hydrazine propellant, so the study of decomposition and combustion reaction mechanism of liquid propellant has become a research hotspot.

[0003] New green liquid propellant often contains oxidizing agent, burning agent, solvent and additive, etc., which is a mixed ionic solution. In actual application, the propellant is introduced into the catalyst bed or high-temperature combustion chamber in the form of microdroplets, directly contacts the catalyst or high-temperature heat accumulator and rapidly decomposes and combusts, produces high-temperature and high-pressure gas and diffuses out through the tail nozzle to form thrust. The decomposition and combustion process of liquid propellant is studied by using traditional flow tube reactor. In order to make the temperature of the reaction zone reach the target value, the adjacent area is also heated to a relatively high temperature by the heating furnace. The propellant is heated to a higher temperature by the peripheral system before reaching the reaction zone, and the phase change and decomposition reaction occur in the capillary tube in advance, which cannot truly simulate the actual application conditions, and even the problem of component crystallization and plugging of capillary tube occurs.

[0004] In addition, mass spectrometry, especially advanced vacuum photoionization mass spectrometry, can detect reaction intermediates on the basis of breaking the molecular structure, and provide reliable experimental evidence for the study of chemical reaction mechanism. However, since the decomposition and combustion reaction of liquid propellant is a millisecond-level rapid process, the ordinary mass spectrometer cannot effectively capture the reaction intermediates due to the long time difference caused by the position difference between sampling and detection. SUMMARY

[0005] Therefore, the present application provides a liquid propellant laser heating reaction device for online sampling and detection of mass spectrometry.

[0006] To this end, the present application provides the following technical solutions: A liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection includes a frame, a propellant injector, a mass spectrometer sampling cone, and a reaction stage cylinder. The frame contains a reaction chamber, and the reaction stage cylinder vertically penetrates the bottom surface of the frame. A high-temperature heat storage body installed at its upper end corresponds to a laser heater located below the reaction stage cylinder. The propellant injector and the mass spectrometer sampling cone are located on any two different surfaces of the frame, excluding the bottom surface. The injection end of the propellant injector and the sampling end of the mass spectrometer sampling cone both correspond to the laser heating area on the high-temperature heat storage body.

[0007] Furthermore, the reaction platform cylinder is mounted on the bottom surface of the frame via a reaction platform docking flange, and an inlet pipe and an outlet pipe communicating with the reaction chamber are respectively installed on the side wall of the reaction platform docking flange.

[0008] Furthermore, a sealing and locking gasket is installed between the reaction table flange and the reaction table cylinder. A reaction table locking flange is threaded on the reaction table cylinder below the sealing and locking gasket, with the upper end of the reaction table locking flange abutting against the lower end of the sealing and locking gasket.

[0009] Furthermore, two first mounting plates are overlapped on the surface of the frame where the propellant injector is mounted. Sealing holes are provided at the same position on the two first mounting plates. The relative inner sides of the two first mounting plates form an annular sealing groove around the sealing hole. A sealing plate is installed in the sealing groove, and the propellant injector passes through the sealing plate and is fixed.

[0010] Furthermore, a mass spectrometer docking flange is installed on the surface of the frame corresponding to the mass spectrometer sampling cone. The frame is sealed and installed on the mass spectrometer detection equipment through the mass spectrometer docking flange, and the mass spectrometer sampling cone is connected to the mass spectrometer detection equipment.

[0011] Furthermore, two second mounting plates are overlapped and installed on the remaining surfaces of the frame. Glass mounting holes are provided at the same positions on the two second mounting plates. The relative inner sides of the two second mounting plates form annular mounting grooves around the glass mounting holes, and optical glass is installed in the mounting grooves.

[0012] Furthermore, a laser lens is installed at the lower end of the reaction platform cylinder via a locking nut, and the locking nut has a laser through hole corresponding to the laser lens.

[0013] Furthermore, a rotating handle is installed on the reaction platform cylinder.

[0014] Furthermore, the optical glass is selected from at least one of high-transparency quartz glass, infrared transparent glass, ultraviolet transparent glass, and laser transparent glass.

[0015] Furthermore, the material of the high-temperature heat storage body is alumina, graphite, stainless steel, or a high-temperature resistant alloy.

[0016] Advantages and positive effects of the present invention: A laser is emitted by a laser heater and directed onto a high-temperature heat storage body. This causes the laser spot area on the heat storage body to form a high-temperature reaction micro-region, while the surrounding environment remains at a low temperature. This allows for the rapid introduction of the high-temperature reaction micro-region before the liquid propellant undergoes physical and chemical changes, simulating the high-temperature reaction conditions in actual applications. By directly inserting the sampling end of the mass spectrometer sampling cone into the high-temperature reaction micro-region, effective online sampling and rapid detection of intermediate products during the reaction process can be achieved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural diagram of a first embodiment of a liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection provided by the present invention.

[0019] Figure 2 This is a cross-sectional view of a first embodiment of a liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection provided by the present invention.

[0020] Figure 3 This is a structural diagram of a second embodiment of a liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection provided by the present invention.

[0021] Figure 4 This is a cross-sectional view of a second embodiment of a liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection provided by the present invention.

[0022] In the diagram: 1. Mass spectrometer sampling cone; 2. Reaction chamber; 3. Frame; 4. Mass spectrometer docking flange; 5. Reaction stage docking flange; 6. Inlet pipe; 7. Outlet pipe; 8. Second mounting plate; 9. Optical glass; 10. First mounting plate; 11. High-temperature heat storage body; 12. Reaction stage cylinder; 13. Locking nut; 14. Sealing locking gasket; 15. Reaction stage locking flange; 16. Propellant injector; 17. Sealing plate; 18. Laser lens; 19. Sealing hole; 20. Sealing groove; 21. Glass mounting hole; 22. Mounting groove; 23. Laser through hole; 24. Rotary handle. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0024] This invention provides a liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection, such as... Figures 1-2 As shown, the system includes a frame 3, a propellant injector 16, a mass spectrometer sampling cone 1, and a reaction stage cylinder 12. A reaction chamber 2 is located within the frame 3. The reaction stage cylinder 12 vertically penetrates the bottom surface of the frame 3. A high-temperature heat storage body 11 installed at its upper end corresponds to a laser heater located below the reaction stage cylinder 12. The reaction stage cylinder 12 is mounted on the bottom surface of the frame 3 via a reaction stage docking flange 5. An inlet pipe 6 and an outlet pipe 7, communicating with the reaction chamber 2, are respectively installed on the side wall of the reaction stage docking flange 5. One or more of the following can be installed on the inlet pipe 6 and the outlet pipe 7: a ball valve, a safety relief valve, a pressure gauge, and a pressure sensor. A sealing locking gasket 14 is installed between the reaction stage docking flange 5 and the reaction stage cylinder 12. A reaction stage locking flange 15 is threaded onto the reaction stage cylinder 12 below the sealing locking gasket 14, with the upper end of the reaction stage locking flange 15 abutting against the lower end of the sealing locking gasket 14. The sealing gasket 14 can be one or more, made of one or more of the following materials: polytetrafluoroethylene, graphite, composite graphite, silicone, etc. A rotating handle 24 is installed on the reaction platform cylinder 12. Rotating the handle 24 allows the reaction platform cylinder 12 to rotate, which in turn causes the reaction platform cylinder 12 to move up and down via threaded transmission, changing the distance between the upper surface of the high-temperature heat storage body 11 and the sampling end of the mass spectrometer sampling cone 1. The surface of the reaction platform cylinder 12 in contact with the sealing gasket 14 is a smooth surface. The sealing gasket 14 is pressed by the reaction platform locking flange 15 to ensure a sealed contact between the sealing gasket 14 and the reaction platform cylinder 12, and the reaction platform cylinder 12 can move up and down relative to the frame 3 while maintaining a sealed condition.

[0025] The high-temperature heat storage body 11 is made of materials such as alumina, graphite, stainless steel, or high-temperature resistant alloys, and the laser source of the laser heater is... It is one of the lasers of different wavelengths and energies, such as laser, high-power diode laser, diode laser beam combiner, or pulsed laser. The propellant injector 16 can be a thin tube or a capillary atomizing nozzle. The propellant injector can drip propellant into the high-temperature reaction zone in liquid form or spray it into the high-temperature micro-reaction zone in a spray form.

[0026] The propellant injector 16 and the mass spectrometer sampling cone 1 are located on any two different surfaces of the frame 3, excluding the bottom surface. The injection end of the propellant injector 16 and the sampling end of the mass spectrometer sampling cone 1 are respectively located on the laser heating area on the high-temperature heat storage body 11.

[0027] Two first mounting plates 10 are overlapped on the surface of frame 3 where the propellant injector 16 is mounted. Sealing holes 19 are provided at the same positions on the two first mounting plates 10. An annular sealing groove 20 is formed around the sealing hole 19 on the opposite inner sides of the two first mounting plates 10. A sealing plate 17 is installed within the sealing groove 20, and the propellant injector 16 passes through and is fixed to the sealing plate 17. A mass spectrometer docking flange 4 is mounted on the surface of frame 3 corresponding to the mass spectrometer sampling cone 1. Frame 3 is sealed and installed on the mass spectrometer detection equipment through the mass spectrometer docking flange 4, and the mass spectrometer sampling cone 1 is connected to the mass spectrometer detection equipment.

[0028] Two second mounting plates 8 are overlapped on the remaining surfaces of the frame 3. Glass mounting holes 21 are provided at the same position on the two second mounting plates 8. The relative inner sides of the two second mounting plates 8 form annular mounting grooves 22 around the glass mounting holes 21. Optical glass 9 is installed in the mounting grooves 22. The optical glass 9 is selected from at least one of high-transparency quartz glass, infrared transparent glass, ultraviolet transparent glass and laser transparent glass.

[0029] A laser lens 18 is installed at the lower end of the reaction platform cylinder 12 via a locking nut 13. The locking nut 13 has a laser through hole 23 corresponding to the laser lens 18.

[0030] Example 1 Figures 1-2 As shown, the mass spectrometer sampling cone 1 is located on the top surface of the frame 3, the propellant injector 16 is located on the side of the frame 3, and the optical glass 9 includes two high-transparency quartz glasses and one infrared-transparent glass, which are respectively installed on the other surfaces of the frame 3. The temperature of the reaction zone is monitored by an infrared thermal imager through the infrared-transparent glass, and the reaction process is recorded by a high-speed camera through the high-transparency quartz glass.

[0031] During operation, the target atmosphere gas is introduced into the reaction chamber 2 through the inlet pipe 6 and the outlet pipe 7, and the internal pressure of the reaction chamber 2 is controlled to reach the target pressure. The laser heater then emits... The laser beam is projected onto the bottom surface of the high-temperature heat storage body 11 of alumina through the laser lens 18. The high-temperature heat storage body 11 absorbs the laser energy, causing the temperature of the laser spot area of ​​the high-temperature heat storage body 11 to instantly reach the target temperature. Before the temperature in the reaction chamber 2 reaches the propellant phase change temperature, the propellant is introduced into the high-temperature micro-reaction zone in the form of droplets through the propellant sampler 16, causing a rapid high-temperature decomposition or combustion reaction of the propellant. The intermediate products of the propellant reaction are sampled and detected online using the mass spectrometer sampling cone 1 that extends into the reaction micro-zone.

[0032] Example 2Figures 3-4 As shown, the mass spectrometer sampling cone 1 is located on the side of the frame 3, and the propellant injector 16 is located on the top surface of the frame 3.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection, characterized in that, The system includes a frame (3), a propellant injector (16), a mass spectrometer sampling cone (1), and a reaction stage cylinder (12). The frame (3) contains a reaction chamber (2), and the reaction stage cylinder (12) vertically penetrates the bottom surface of the frame (3). The high-temperature heat storage body (11) installed at its upper end corresponds to the laser heater located below the reaction stage cylinder (12). The propellant injector (16) and the mass spectrometer sampling cone (1) are located on any two different surfaces of the frame (3) except the bottom surface. The injection end of the propellant injector (16) and the sampling end of the mass spectrometer sampling cone (1) correspond to the laser heating area on the high-temperature heat storage body (11).

2. The liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection according to claim 1, characterized in that, The reaction platform cylinder (12) is installed on the bottom surface of the frame (3) through the reaction platform docking flange (5). The inlet pipe (6) and outlet pipe (7) connected to the reaction chamber (2) are respectively installed on the side wall of the reaction platform docking flange (5).

3. The liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection according to claim 2, characterized in that, A sealing and locking gasket (14) is installed between the reaction table connecting flange (5) and the reaction table cylinder (12). A reaction table locking flange (15) is threaded on the reaction table cylinder (12) below the sealing and locking gasket (14). The upper end of the reaction table locking flange (15) abuts against the lower end of the sealing and locking gasket (14).

4. The liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection according to claim 1, characterized in that, Two first mounting plates (10) are overlapped on the surface of the frame (3) where the propellant injector (16) is installed. Sealing holes (19) are provided at the same position on the two first mounting plates (10). An annular sealing groove (20) is formed on the inner side of the two first mounting plates (10) around the sealing hole (19). A sealing plate (17) is installed in the sealing groove (20). The propellant injector (16) passes through the sealing plate (17) and is fixed.

5. The liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection according to claim 1, characterized in that, The frame (3) is mounted on the surface of the mass spectrometer sampling cone (1) with a mass spectrometer docking flange (4). The frame (3) is sealed and installed on the mass spectrometer detection equipment through the mass spectrometer docking flange (4). The mass spectrometer sampling cone (1) is connected to the mass spectrometer detection equipment.

6. The liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection according to claim 1, characterized in that, Two second mounting plates (8) are overlapped on the remaining surfaces of the frame (3). Glass mounting holes (21) are provided at the same position on the two second mounting plates (8). The relative inner sides of the two second mounting plates (8) form an annular mounting groove (22) around the glass mounting hole (21). Optical glass (9) is installed in the mounting groove (22).

7. The liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection according to claim 1, characterized in that, The lower end of the reaction platform cylinder (12) is fitted with a laser lens (18) via a locking nut (13), and the locking nut (13) is provided with a laser through hole (23) corresponding to the laser lens (18).

8. The liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection according to claim 3, characterized in that, A rotating handle (24) is installed on the reaction platform cylinder (12).

9. The liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection according to claim 1, characterized in that, The optical glass (9) is selected from at least one of high-transparency quartz glass, infrared transparent glass, ultraviolet transparent glass and laser transparent glass.

10. The liquid propellant laser-heated reaction device for online mass spectrometry sampling and detection according to claim 1, characterized in that, The material of the high-temperature heat storage body (11) is alumina, graphite, stainless steel or high-temperature resistant alloy.

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