Integrated Gas Mixing and Heat Monitoring System

Abstract

The present invention provides an integrated system for gas mixing and heating monitoring, which includes a gas mixing and heating device and a gas heating and monitoring device; the gas heating and monitoring device includes a gas heating and monitoring chamber and partition chambers located outside both ends in the length direction of the gas heating and monitoring chamber. The partition chambers are connected with vent pipes having valves that can be connected to an external gas supply device, and the gas supply device can provide inert gas. The gas mixing and heating device of the present invention can mix single gas or multiple gases evenly, heat them to a set temperature and maintain a constant temperature, with good mixing and heating effect and controllable output gas temperature; the gas heating and monitoring device can monitor the temperature of the gas to be detected, heat the gas and maintain the gas at a constant temperature, which can ensure that the temperature of the detected gas is uniformly constant and is applicable to the exploration of the properties of mixed gases and single gases; moreover, inert gas is introduced into the partition chambers at both ends to ensure that there is no interference from other high-temperature gases outside the lenses at both ends of the gas heating and monitoring chamber.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas mixing and heating and monitoring, and particularly relates to an integrated gas mixing and heating monitoring system. Background Art

[0002] By exploring the spectra of a single gas at different temperatures, pressures, and concentrations, it is possible to verify the gas spectral data calculated line by line in the Hitran spectral database and provide measured data support. By exploring the property relationship between the flame of flammable items such as low-carbon chemicals and the high-temperature gas generated by their combustion (for the exploration of the properties of mixed gases), it is possible to provide measured underlying data for the quantitative inversion of atmospheric environmental pollution gases.

[0003] The gas property exploration device includes a single gas exploration device and a mixed gas exploration device. Currently, the existing gas property exploration devices have relatively single functions. Among them, the device for exploring a single gas does not have the ability to simulate the temperature distribution and component concentration of the flame combustion products (that is, it cannot detect mixed gases); while the device for exploring mixed gases often cannot achieve uniform and constant-temperature gas detection. For example, in the gas mixing and heating integrated device disclosed in CN202010767448.1, the temperature of the gas after being exported is uncertain, making it difficult to meet the requirements of factory processing processes or laboratory experiments that have requirements for temperature. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the prior art, and the purpose of the present invention is to provide an integrated gas mixing and heating monitoring system.

[0005] To achieve the above object, the present invention adopts the following technical solution: An integrated gas mixing and heating monitoring system includes a gas mixing and heating device and a gas heating and monitoring device; the gas mixing and heating device includes a mixing chamber capable of uniformly mixing multiple gases, and a constant-temperature chamber capable of heating the gas discharged from the mixing chamber to maintain it at a set temperature. The air inlet of the mixing chamber is connected with multiple inlet pipes with valves connected in parallel, and the air outlet of the constant-temperature chamber is connected with an outlet pipe with a valve; the gas heating and monitoring device includes a gas heating and monitoring chamber, and partition chambers located outside both ends in the length direction of the gas heating and monitoring chamber. The partition chambers are connected with a through pipe with a valve that can be connected to an external gas supply device, and the gas supply device can provide inert gas; at both ends of the gas heating and monitoring chamber where it is connected to the partition chambers, there are lenses capable of transmitting light, and the spectrometer can pass through the partition chambers and the lenses so that the gas heating and monitoring chamber is within its field of view angle; the gas heating and monitoring chamber is connected with an inlet and outlet pipe with a valve that communicates with its interior, and the inlet and outlet pipe is connected to the outlet of the outlet pipe through a detachable connecting pipe. The gas heating and monitoring chamber has a first heating device capable of heating the gas inside it and a first temperature measuring element capable of monitoring the temperature of the gas inside it.

[0006] In the above technical solution, the gas mixing and heating device can mix a single gas or multiple gases evenly, heat them to a set temperature and maintain a constant temperature. The mixing and heating effect is good and the output gas temperature is controllable. The gas heating and monitoring device can monitor the temperature of the gas to be detected, heat the gas and maintain the gas at a constant temperature, ensuring that the temperature of the detected gas is uniformly constant, and is applicable to the exploration of the properties of mixed gases and single gases. In addition, an inert gas is introduced into the partition chambers at both ends by the gas supply device to ensure that there is no interference from other high-temperature gases outside the lenses at both ends of the gas heating and monitoring chamber, making the gas spectral data measured by the spectrometer more accurate.

[0007] In a preferred embodiment of the present invention, the first heating device includes three groups of heating components with adjustable power, which are arranged at intervals along the length direction of the gas heating and monitoring chamber. The three groups of heating components are the flame core heating component located in the middle and the outer flame heating components located on both sides. The heating components are arranged inside the gas heating and monitoring chamber or surround the outer wall of the gas heating and monitoring chamber. At least the heating areas corresponding to the flame core heating component and one group of outer flame heating components are provided with first temperature measuring elements.

[0008] In the above technical solution, the first heating device includes a flame core heating component and outer flame heating components located on both sides, which can simulate the situation where the temperature of the flame combustion products is that the flame core temperature is lower than the outer flame temperature, that is, it can simulate the mixed gas state of the components of the flame combustion products, so as to better detect the properties of the mixed gas.

[0009] In a preferred embodiment of the present invention, both the gas heating and monitoring chamber and the partition chamber are accommodation spaces enclosed by quartz tubes. The two ends of the gas heating and monitoring chamber are connected to the partition chamber through connection ports, and the lenses are embedded and installed in the connection ports.

[0010] In the above technical solution, the quartz tube is a transparent material and is easily obtainable, which can meet the use requirements. The partition chamber is connected to the gas heating and monitoring chamber through a connection port, and the installation is convenient.

[0011] In a preferred embodiment of the present invention, both of the partition chambers at both ends of the gas heating and monitoring chamber have a second heating device capable of heating the gas inside it, and at least one of the partition chambers located at one end of the gas heating and monitoring chamber is provided with a first temperature measuring element capable of monitoring the temperature of the gas inside it.

[0012] In the above technical solution, by setting the second heating device, the gas temperature in the gas heating and monitoring chamber is ensured to be uniform, avoiding the temperature at the left and right ends of the gas heating and monitoring chamber being lower than the temperature at the central part.

[0013] In a preferred embodiment of the present invention, the constant temperature chamber has a fourth heating device capable of heating the gas inside it and a second temperature measuring element capable of monitoring the temperature of the gas inside it. The fourth heating device includes a plurality of heating grids arranged at intervals and circuitously along the length direction of the constant temperature chamber. The number of the second temperature measuring elements is two, and the two second temperature measuring elements are close to the outlet of the constant temperature chamber and arranged staggeredly.

[0014] In the above technical solution, through the plurality of heating grids arranged circuitously, rapid constant temperature is achieved and the temperature is ensured to be uniform. Moreover, by arranging two second temperature measuring elements staggeredly, the monitoring of the gas temperature inside the constant temperature chamber is achieved.

[0015] In another preferred embodiment of the present invention, the gas mixing and heating device further includes a preheating chamber located upstream of the constant temperature chamber. A third heating device is provided in the preheating chamber. The inside of the preheating chamber has multiple layers of ventilation pipes arranged at intervals and communicating with each other along the height direction. Each layer of ventilation pipe is arranged circuitously in the preheating chamber. The inlet of the preheating chamber is connected to the inlet of one layer of ventilation pipe, and the outlet of the preheating chamber is connected to the outlet of one layer of ventilation pipe. The third heating device includes a plurality of heating coils arranged at intervals along the length direction of each layer of ventilation pipe.

[0016] In the above technical solution, by providing a preheating chamber to preheat the gas entering the constant temperature chamber first, and the preheating chamber is provided with multiple layers of ventilation pipes, which is a stratified diversion structure. It can achieve an efficient preheating effect while making full use of the space, so that the preheating chamber has a small floor area and a light weight.

[0017] In another preferred embodiment of the present invention, the mixing chamber includes a premixing chamber and a uniform mixing chamber. The inlet pipe is connected to the inlet of the premixing chamber, the outlet of the premixing chamber is connected to the inlet of the uniform mixing chamber, and a uniform mixing device for uniformly mixing the gas inside it is provided in the uniform mixing chamber. The premixing chamber and the uniform mixing chamber mix gas through the air pressure difference inside and outside the chamber.

[0018] In the above technical solution, dividing the mixing chamber into a premixing chamber and a uniform mixing chamber can make the mixed gas more uniform, and by mixing gas through the air pressure difference inside and outside the chamber, there is no need to set up additional gas mixing power equipment, and the cost is low.

[0019] In another preferred embodiment of the present invention, the uniform mixing device includes a multi-stage gas mixing disc which is hollow and arranged at intervals and communicating with each other along the length direction of the uniform mixing chamber. The inlet of the uniform mixing chamber is connected to the inlet of the first-stage gas mixing disc. A plurality of air outlet holes communicating with its inside are provided on the end face and / or outer wall of the gas mixing disc, and the gas inside the gas mixing disc can be discharged into the uniform mixing chamber through the air outlet holes.

[0020] In the above technical solution, by setting a multi-stage gas mixing disc, the gas mixing is more uniform.

[0021] In another preferred embodiment of the present invention, the area of the first-stage gas mixing disk is set to be the smallest, and the number of air outlet holes of the first-stage gas mixing disk is the least. Then, the area of each subsequent gas mixing disk is increased in sequence, and at the same time, the number of air outlet holes of each gas mixing disk is increased.

[0022] In the above technical solution, the air pressure of the air outlet holes of each gas mixing disk is controlled to be approximately the same, ensuring that the gas can overflow from each air outlet hole of the multi-stage gas mixing disk to achieve a uniform mixing effect.

[0023] In another preferred embodiment of the present invention, flow meters are provided on the inlet pipes, and flow meters are provided on the outlet pipes; and / or pressure gauges and flow meters are provided on the inlet and outlet pipes.

[0024] In the above technical solution, the setting of the flow meters and pressure gauges facilitates the monitoring of the gas flow rate and pressure, and the control of the proportion and quantity of the mixed gas.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Brief Description of the Drawings

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0027] Figure 1 is the front view structural schematic diagram of the integrated gas mixing and heating monitoring system of the embodiment.

[0028] Figure 2 is Figure 1 the A-A cross-sectional schematic diagram in

[0029] Figure 3 is Figure 1 the top view structural schematic diagram of the gas mixing and heating device in , and the preheating chamber is the top view structural schematic diagram of the uppermost layer ventilation pipeline.

[0030] Figure 4 is Figure 1 the top view structural schematic diagram of the middle layer ventilation pipeline of the preheating chamber in .

[0031] Figure 5 is Figure 1 the top view structural schematic diagram of the lowermost layer ventilation pipeline of the preheating chamber in .

[0032] The reference numerals in the accompanying drawings of the specification include: partition chamber 1, second heating device 2, connection port 3, inner flame heating component 4, outer flame heating component 5, first temperature measuring element 6, heat preservation layer 7, gas heating monitoring chamber 8, ventilation pipe 9, lens 10, barometer 11, valve 12, quartz tube 13, inlet and outlet pipe 14, outlet pipe 15, flowmeter 16, premixing chamber 17, inlet pipe 18, uniform mixing chamber 19, gas mixing plate 20, preheating chamber 21, ventilation duct 22, heating coil 23, constant temperature chamber 24, heating mesh 25, second temperature measuring element 26, connecting pipe 27. Detailed implementation manners

[0033] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0035] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The present invention provides a gas mixing and heating monitoring integrated system. As Figures 1-3 shown, in a preferred embodiment of the present invention, the integrated system includes a gas mixing and heating device and a gas heating monitoring device. Figure 1 As shown in

[0037] The gas mixing and heating device includes a mixing chamber capable of uniformly mixing a variety of gases, and a constant temperature chamber 24 capable of heating the gas discharged from the mixing chamber to maintain it at a set temperature. The air inlet of the mixing chamber is connected with a plurality of inlet pipes 18 with valves 12 connected in parallel. Figure 1 and Figure 3As shown, three intake pipes 18 are provided. Specifically, the number of intake pipes 18 can be adaptively adjusted according to the types of gases to be mixed. A flow meter 16 is also provided on the intake pipe 18. The outlet of the constant temperature chamber 24 is connected to an outlet pipe 15 with a valve 12, and a flow meter 16 is also provided on the outlet pipe 15.

[0038] In the present invention, the mixing chamber includes a pre-mixing chamber 17 on the left side and a uniform mixing chamber 19 on the right side. The intake pipe 18 is connected to the inlet of the pre-mixing chamber 17, the outlet of the pre-mixing chamber 17 is connected to the inlet of the uniform mixing chamber 19, and a uniform mixing device for uniformly mixing the internal gas is provided in the uniform mixing chamber 19. The pre-mixing chamber 17 and the uniform mixing chamber 19 mix gases through the air pressure difference inside and outside the chambers, and there is no need to set up additional gas mixing power equipment.

[0039] The gas heating monitoring device includes a gas heating monitoring chamber 8 and partition chambers 1 located outside both ends in the length direction ( Figure 1 the left-right direction shown) of the gas heating monitoring chamber 8. Figure 1 As shown, a partition chamber 1 is provided on each of the left and right sides of the gas heating monitoring chamber 8. The partition chamber 1 is connected to a ventilation pipe 9 with a valve 12 that can be connected to an external gas supply device. The gas supply device can provide an inert gas. Preferably, the gas supply device can introduce nitrogen into the partition chamber 1. Preferably, both the gas heating monitoring chamber 8 and the partition chamber 1 are accommodation spaces enclosed by a quartz tube 13, and the quartz tube 13 is a transparent material.

[0040] Lenses 10 that can transmit light are provided at the connections between both ends of the gas heating monitoring chamber 8 and the partition chambers 1. Preferably, the lenses 10 are single-crystal silicon lenses. A spectrometer (such as a Fourier transform infrared spectrometer) can pass through the partition chamber 1 and the lenses 10, so that the gas heating monitoring chamber 8 is within the field of view angle of the spectrometer. Both ends of the gas heating monitoring chamber 8 and the partition chambers 1 are connected by connection ports 3, and the lenses 10 are embedded in the connection ports 3. For example, the connection port 3 is a connection disk with a thickness, and the lenses 10 are threadedly rotated and embedded in the connection port 3.

[0041] The gas heating monitoring chamber 8 is connected to an inlet and outlet pipe 14 with a valve 12 that is communicated with its interior. The inlet and outlet pipe 14 is connected to the inlet and outlet of the right end of the gas heating monitoring chamber 8, and the inlet and outlet pipe 14 is connected to the outlet of the outlet pipe 15 through a detachable connecting pipe 27. A pressure gauge 11 and a flow meter 16 are provided on the inlet and outlet pipe 14. The pressure gauge 11 and the flow meter 16 on the inlet and outlet pipe 14 are located on the left side of its valve 12, that is, the pressure gauge 11 and the flow meter 16 are arranged closer to the inlet and outlet of the gas heating monitoring chamber 8.

[0042] The gas heating monitoring chamber 8 is provided with a first heating device capable of heating the gas inside it and a first temperature measuring element 6 capable of monitoring the temperature of the gas inside it. Specifically, the first heating device includes three groups of heating components with adjustable power spaced along the length direction of the gas heating monitoring chamber 8. The three groups of heating components are respectively the inner flame heating component 4 located in the middle and the outer flame heating components 5 located on both sides of the inner flame heating component 4. The heating power of the inner flame heating component 4 can be adjusted independently, and the heating powers of the two groups of outer flame heating components 5 can be adjusted synchronously. For example, the two groups of outer flame heating components 5 are controlled by one switch. The heating components are arranged inside the gas heating monitoring chamber 8 or surround the outer wall of the gas heating monitoring chamber 8. For example, the heating component is a group of heating wires wound around the outer wall of the gas heating monitoring chamber 8. A heat insulation layer 7 is provided outside the gas heating monitoring chamber 8, and the heating component is located between the heat insulation layer 7 and the quartz tube 13.

[0043] In this embodiment, at least the heating areas corresponding to the inner flame heating component 4 and one group of outer flame heating components 5 are provided with the first temperature measuring element 6. The first temperature measuring element 6 is a thermocouple. Since the heating powers of the two outer flame heating components 5 can be adjusted synchronously, only one first temperature measuring element 6 can be provided in the heating areas corresponding to the two outer flame heating components 5. For example, the first temperature measuring element 6 is provided in the heating areas corresponding to the left outer flame heating component 5 and the middle inner flame heating component 4 respectively.

[0044] In another preferred embodiment of the present invention, the partition chambers 1 at both ends of the gas heating monitoring chamber 8 are both provided with a second heating device 2 capable of heating the gas inside them. Preferably, the second heating device 2 is also a group of heating wires wound around the outer wall of the quartz tube 13. In this embodiment, at least the partition chamber 1 at one end of the gas heating monitoring chamber 8 is provided with a first temperature measuring element 6 capable of monitoring the temperature of the gas inside it. For example, the first temperature measuring element 6 is provided in the left partition chamber 1.

[0045] As Figure 1 and Figure 3 shown, in the present invention, the constant temperature chamber 24 is provided with a fourth heating device capable of heating the gas inside it and a second temperature measuring element 26 capable of monitoring the temperature of the gas inside it. The second temperature measuring element 26 is also a thermocouple. A heat insulation layer 7 is also provided outside the constant temperature chamber 24. Among them, the fourth heating device includes a plurality of heating meshes 25 spaced and arranged circuitously along the length direction of the constant temperature chamber 24, Figure 1 and Figure 3 as shown in the figure, three heating meshes 25 are provided. The number of the second temperature measuring elements 26 is two, and the two second temperature measuring elements 26 are close to the outlet of the constant temperature chamber 24 and arranged staggeredly.

[0046] As Figure 1 and Figure 3 shown, in another preferred embodiment of the present invention, the homogenizing device includes along the length direction of the homogenizing chamber 19 (Figure 1 A multi-stage gas mixing plate 20 with a hollow structure is provided at intervals in the left-right direction (for example, three gas mixing plates 20 are provided, which is a three-stage gas mixing plate 20). The inlet at the left end of the uniform mixing chamber 19 is connected to the inlet at the left end of the first-stage gas mixing plate 20. Several air outlet holes communicating with the inside are provided on the end face and / or outer wall of the gas mixing plate 20. The gas inside the gas mixing plate 20 can be discharged into the uniform mixing chamber 19 through the air outlet holes. Since the air pressure near the inlet of the uniform mixing chamber 19 is relatively large, preferably, the area of the first-stage gas mixing plate 20 on the left side is set to be the smallest, and the number of air outlet holes of the first-stage gas mixing plate 20 is the least. The area of each stage of the gas mixing plate 20 increases sequentially from left to right, and at the same time, the number of air outlet holes of each stage of the gas mixing plate 20 is increased, so as to control the air pressure of the air outlet holes of each gas mixing plate 20 to be close, ensuring that the gas can overflow from each air outlet hole of the multi-stage gas mixing plate 20 and achieving the uniform mixing effect.

[0047] Such as Figure 1 、 Figures 3-5 As shown in the figure, in another preferred embodiment of the present invention, the gas mixing and heating device further includes a preheating chamber 21 located upstream of the constant temperature chamber 24. The preheating chamber 21 is provided between the constant temperature chamber 24 and the uniform mixing chamber 19. A third heating device is provided inside the preheating chamber 21, and a heat insulation layer 7 is also provided outside the preheating chamber 21. The inside of the preheating chamber 21 has multiple layers of ventilation pipes 22 provided at intervals in the height direction and communicating with each other. For example, three layers of ventilation pipes 22 are provided, and each layer of ventilation pipes 22 is arranged in a circuitous manner inside the preheating chamber 21. The inlet of the preheating chamber 21 is connected to the inlet of one layer of ventilation pipes 22, for example, connected to the inlet at the left end of the uppermost layer of ventilation pipes 22; the outlet of the preheating chamber 21 is connected to the outlet of one layer of ventilation pipes 22, for example, connected to the outlet at the right end of the lowermost layer of ventilation pipes 22. The third heating device includes several heating coils 23 provided at intervals along the length direction of each layer of ventilation pipes 22. For example, each layer of ventilation pipes 22 is circuitous six times in the front-rear direction, and one heating coil 23 is provided for each circuit, so six heating coils 23 are provided for one layer of ventilation pipes 22. The purpose of quickly heating the gas can be achieved by changing the power of the heating coils 23 and the gas flow rate.

[0048] With such a technical solution, the gas discharged from the homogenizing chamber 19 enters from the inlet at the left rear end of the uppermost ventilation duct 22, and then makes six detours from back to front, from front to back, from back to front, from front to back, from back to front, and from front to back from left to right. After being heated by the heating coil 23 of this layer, it flows vertically downward from the outlet at the right rear end to the inlet at the right rear end of the middle-layer ventilation duct 22; then it makes six detours from right to left in the middle-layer ventilation duct 22, and after being heated by the heating coil 23 of this layer, it flows vertically downward from the outlet at the left rear end to the inlet at the left rear end of the lowermost ventilation duct 22; then it makes six detours from left to right in the lowermost ventilation duct 22, and after being heated by the heating coil 23 of this layer, it enters the ventilation duct 22 at the middle position on the right side, which is connected to the outlet at the middle position on the right side of the preheating chamber 21, so as to discharge the preheating chamber 21 and enter the constant temperature chamber 24.

[0049] The integrated system of the present invention can prepare a constant temperature mixed gas, can cooperate with a spectrometer to detect the spectral properties of a single gas, and simulate the mixed gas state of the components of the flame combustion products, and cooperate with the spectrometer to perform spectral detection.

[0050] 1. The preparation process of the constant temperature mixed gas is as follows:

[0051] Open the valve 12 on one intake pipe 18, close the valves 12 on the remaining intake pipes 18 and the valve 12 at the outlet pipe 15 of the constant temperature chamber 24, connect the vacuum pump to one intake pipe 18 with the valve 12 opened, and perform a vacuum pumping operation on the gas mixing and heating device. After vacuum pumping, turn on the switch of the heating coil 23 of the preheating chamber 21 and the switch of the heating grid 25 of the constant temperature chamber 24 to perform the preheating work of the heating coil 23 and the heating grid 25. Then connect the gas to be mixed to the intake pipe 18, and connect different gases to different intake pipes 18 respectively. Then open the valve 12 on the intake pipe 18 and observe the change of the flowmeter 16 on the intake pipe 18 to control the gas ratio entering the premixing chamber 17. Observe the reading of the second temperature measuring element 26 in the constant temperature chamber 24. When the reading of the second temperature measuring element 26 reaches the set target temperature, open the valve 12 at the outlet pipe 15 of the constant temperature chamber 24, and at this time, a constant temperature mixed gas can be output. During the process of the gas mixing and heating device outputting the constant temperature mixed gas, when the average temperature of the two second temperature measuring elements 26 is higher than the set target temperature of the gas, close the heating grid 25 of the constant temperature chamber 24. When the average temperature of the two second temperature measuring elements 26 is lower than the set target temperature of the gas, turn on the heating grid 25 of the constant temperature chamber 24 to ensure that the gas mixing and heating device outputs a constant temperature mixed gas.

[0052] 2. Detecting the spectral properties of a single gas

[0053] According to the ideal gas state equation: PV = nRT,

[0054] Wherein: P is the air pressure in the gas heating monitoring chamber 8;

[0055] V is the gas volume in the gas heating monitoring chamber 8;

[0056] n is the amount of substance of the gas introduced into the gas heating monitoring chamber 8;

[0057] R is a constant;

[0058] T is the temperature of the gas introduced into the gas heating monitoring chamber 8.

[0059] When the gas heating monitoring chamber 8 is closed, V, n, and R are all known fixed values. Therefore, when a single gas is introduced into the gas heating monitoring chamber 8, the temperature T of the introduced gas should be determined. According to the temperature T of the introduced gas, the air pressure P in the gas heating monitoring chamber 8 before heating is determined to ensure that when the gas in the gas heating monitoring chamber 8 is heated to the target temperature, the corresponding air pressure is the target air pressure.

[0060] There are two methods for detecting the spectral properties of a single gas: the room temperature introduction method and the device preheating introduction method.

[0061] (1) Room temperature introduction method:

[0062] Pull out the connecting pipe 27 to disconnect the connection between the inlet and outlet pipe 14 and the outlet pipe 15. Connect the vacuum pump to the inlet and outlet pipe 14, and perform a vacuum operation on the gas heating monitoring chamber 8. Subsequently, at room temperature, connect the inlet and outlet pipe 14 of the gas heating monitoring chamber 8 to the single gas to be measured. Open the valve 12 on the inlet and outlet pipe 14, and observe the readings of the pressure gauge 11 and the flowmeter 16 on the inlet and outlet pipe 14. When the reading of the pressure gauge 11 reaches the target air pressure, close the valve 12 on the inlet and outlet pipe 14, and at the same time open the valves 12 on the two ventilation pipes 9, and continuously and stably introduce nitrogen into the partition chambers 1 at both ends to ensure that there is no interference from other high-temperature gases outside the lenses 10 at both ends of the gas heating monitoring chamber 8.

[0063] Next, turn on the flame core heating component 4 of the gas heating monitoring chamber 8, the two groups of outer flame heating components 5, and the second heating device 2 in the two partition chambers 1, and continuously heat. Observe the reading of the pressure gauge 11 on the inlet and outlet pipe 14 and the readings of the three first temperature measuring elements 6. When the readings of the three first temperature measuring elements 6 are the same and reach the target temperature, and the reading of the pressure gauge 11 reaches the target air pressure, at this time, the temperature of the single gas is uniform and constant, and spectral detection can be carried out. Specifically, the spectrometer can be placed outside the left partition chamber 1 or outside the right partition chamber 1. By adjusting the position of the spectrometer, the high-temperature gas inside the gas heating monitoring chamber 8 is located within the field of view angle of the spectrometer, and the radiation spectrum of the high-temperature gas is detected. Detecting the radiation spectrum of high-temperature gas by using a spectrometer is an existing technology, and its process and principle are not described in detail here.

[0064] (2) Device preheating and gas introduction method

[0065] Perform a vacuum pumping operation on the gas heating monitoring chamber 8 and the gas mixing and heating device. Subsequently, turn on the switch of the heating coil 23 in the preheating chamber 21 and the switch of the heating grid 25 in the constant temperature chamber 24 to perform the preheating work of the heating coil 23 and the heating grid 25. Then connect the single gas to be measured to one of the intake pipes 18, and open the valve 12 on this intake pipe 18 (at this time, the valves 12 on the other intake pipes 18 and the outlet pipe 15 are all closed). Observe the change of the flowmeter 16 on this intake pipe 18 and the reading of the second temperature measuring element 26 in the constant temperature chamber 24. When the reading of the second temperature measuring element 26 reaches the required temperature, open the valve 12 on the outlet pipe 15 and the valve 12 on the intake and outlet pipe 14. At this time, the constant temperature single gas can be introduced into the gas heating monitoring chamber 8. Observe the pressure gauge 11 on the intake and outlet pipe 14. After reaching the target pressure, close the valve 12 on the intake and outlet pipe 14, and at the same time open the valves 12 on the two vent pipes 9 to continuously and stably introduce nitrogen into the partition chambers 1 at both ends to ensure that there is no interference from other high-temperature gases outside the lenses 10 at both ends of the gas heating monitoring chamber 8.

[0066] Next, turn on the flame core heating component 4 and the two groups of outer flame heating components 5 in the gas heating monitoring chamber 8, and the second heating device 2 in the two partition chambers 1, and continuously heat. Observe the reading of the pressure gauge 11 on the intake and outlet pipe 14 and the readings of the three first temperature measuring elements 6. When the readings of the three first temperature measuring elements 6 are consistent and reach the target temperature, and the reading of the pressure gauge 11 reaches the target pressure, at this time the temperature of the single gas is uniformly constant, and spectral detection can be performed.

[0067] The advantage of the room temperature gas introduction method is that the operation is very convenient and the single gas to be measured can be directly introduced. However, the heating time will be longer than that of the device preheating and gas introduction method. In practice, different methods can be selected according to needs for single gas spectral detection.

[0068] 3. Simulate the mixed gas state of the combustion products of the flame and perform spectral detection.

[0069] Perform a vacuum pumping operation on the gas heating monitoring chamber 8 and the gas mixing and heating device. Subsequently, turn on the switch of the heating coil 23 in the preheating chamber 21 and the switch of the heating grid 25 in the constant temperature chamber 24 to perform the preheating work of the heating coil 23 and the heating grid 25. Then connect the gas to be mixed to the inlet pipe 18, with different gases connected to different inlet pipes 18. Then open the valve 12 on the inlet pipe 18 and observe the change of the flowmeter 16 on the inlet pipe 18 to control the gas ratio entering the premixing chamber 17. Observe the reading of the second temperature measuring element 26 in the constant temperature chamber 24. When the reading of the second temperature measuring element 26 reaches the set target temperature, open the valve 12 on the outlet pipe 15 of the constant temperature chamber 24 and the valve 12 on the inlet and outlet pipe 14. At this time, the constant temperature mixed gas can be introduced into the gas heating monitoring chamber 8. Observe the pressure gauge 11 on the inlet and outlet pipe 14. After reaching the target pressure, close the valve 12 on the inlet and outlet pipe 14, and at the same time open the valve 12 on the two ventilation pipes 9 to continuously and stably introduce nitrogen into the partition chambers 1 at both ends to ensure that there is no interference from other high-temperature gases outside the lenses 10 at both ends of the gas heating monitoring chamber 8.

[0070] Next, turn on the flame core heating component 4 and the two groups of outer flame heating components 5 in the gas heating monitoring chamber 8, and the second heating device 2 in the two partition chambers 1, and continuously heat. Observe the reading of the pressure gauge 11 on the inlet and outlet pipe 14 and the readings of the three first temperature measuring elements 6. When the readings of the three first temperature measuring elements 6 reach the set target temperature and the reading of the pressure gauge 11 reaches the target pressure, the simulation of the mixed gas state of the flame combustion products is completed, and spectral detection can be carried out.

[0071] Since the temperature of the flame combustion products is such that the temperature of the flame core is lower than that of the outer flame, and the temperature gradually returns to room temperature in the outer region of the outer flame, the power of the flame core heating component 4 should be reduced during the simulation process, while increasing the heating power of the two groups of outer flame heating components 5. To avoid the temperature at the left and right ends of the gas heating monitoring chamber 8 being lower than the temperature in the central part, it is necessary to turn on the second heating device 2 in the partition chamber 1 to ensure uniform gas temperature in the gas heating monitoring chamber 8. The power of the second heating device 2 depends on the combustibles being simulated.

[0072] In the description of this specification, the description with reference to terms such as "preferred embodiment", "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0073] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An integrated system for gas mixing and heat monitoring, characterized in that, It includes a gas mixing and heating device and a gas heating monitoring device; The gas mixing and heating device includes a mixing chamber capable of uniformly mixing multiple gases, and a constant temperature chamber capable of heating the gas discharged from the mixing chamber to maintain it at a set temperature. The inlet of the mixing chamber is connected with multiple inlet pipes with valves connected in parallel, and the outlet of the constant temperature chamber is connected with an outlet pipe with a valve; The gas heating monitoring device includes a gas heating monitoring chamber and partition chambers located outside both ends in the length direction of the gas heating monitoring chamber. The partition chambers are connected with vent pipes with valves capable of being connected to an external gas supply device, and the gas supply device can provide inert gas; At both ends of the gas heating monitoring chamber where it is connected to the partition chambers, there are lenses capable of transmitting light, and a spectrometer can pass through the partition chambers and the lenses so that the gas heating monitoring chamber is within its field of view angle; The gas heating monitoring chamber is connected with an inlet and outlet pipe with a valve communicating with its interior, and the inlet and outlet pipe is connected to the outlet of the outlet pipe through a detachable connecting pipe. The gas heating monitoring chamber has a first heating device capable of heating the gas inside it and a first temperature measuring element capable of monitoring the temperature of the gas inside it; The first heating device includes three groups of heating components with adjustable power arranged at intervals along the length direction of the gas heating monitoring chamber. The three groups of heating components are respectively a flame core heating component located in the middle and outer flame heating components located on both sides. The heating components are arranged inside the gas heating monitoring chamber or surround the outer wall of the gas heating monitoring chamber. At least the heating areas corresponding to the flame core heating component and one group of outer flame heating components are provided with first temperature measuring elements; Both partition chambers at both ends of the gas heating monitoring chamber have a second heating device capable of heating the gas inside them, and at least one partition chamber at one end of the gas heating monitoring chamber is provided with a first temperature measuring element capable of monitoring the temperature of the gas inside it.

2. The integrated gas mixing and heat monitoring system according to claim 1, wherein Both the gas heating monitoring chamber and the partition chambers are accommodation spaces enclosed by quartz tubes. Both ends of the gas heating monitoring chamber are connected to the partition chambers through connection ports, and the lenses are embedded and installed in the connection ports.

3. The integrated gas mixing and heat monitoring system according to claim 1, characterized in that, The constant temperature chamber has a fourth heating device capable of heating the gas inside it and a second temperature measuring element capable of monitoring the temperature of the gas inside it. The fourth heating device includes multiple heating meshes arranged at intervals and circuitously along the length direction of the constant temperature chamber. The number of the second temperature measuring elements is two, and the two second temperature measuring elements are close to the outlet of the constant temperature chamber and are arranged staggeredly.

4. The integrated gas mixing and heat monitoring system according to claim 1, characterized in that, The gas mixing and heating device further includes a preheating chamber located upstream of the constant temperature chamber. A third heating device is provided in the preheating chamber. The interior of the preheating chamber has multiple layers of ventilation pipes arranged at intervals and communicating with each other in the height direction. Each layer of ventilation pipes is circuitously arranged in the preheating chamber. The inlet of the preheating chamber is connected to the inlet of one layer of ventilation pipes, and the outlet of the preheating chamber is connected to the outlet of one layer of ventilation pipes. The third heating device includes several heating coils arranged at intervals along the length direction of each layer of ventilation pipes.

5. The integrated gas mixing and heat monitoring system according to any one of claims 1-4, characterized in that The mixing chamber includes a premixing chamber and a homogenizing chamber. The intake pipe is connected to the inlet of the premixing chamber. The outlet of the premixing chamber is connected to the inlet of the homogenizing chamber. A homogenizing device for uniformly mixing the internal gas is provided in the homogenizing chamber. The premixing chamber and the homogenizing chamber mix the gas by the air pressure difference inside and outside the chambers.

6. The integrated gas mixing and heat monitoring system according to claim 5, characterized in that The homogenizing device includes a multi-stage gas mixing disc which is hollow and arranged at intervals along the length direction of the homogenizing chamber and is communicated with each other. The inlet of the homogenizing chamber is connected to the inlet of the first-stage gas mixing disc. A number of air outlet holes communicated with the inside thereof are provided on the end face and / or outer wall of the gas mixing disc, and the gas inside the gas mixing disc can be discharged into the homogenizing chamber through the air outlet holes.

7. The integrated gas mixing and heat monitoring system according to claim 6, characterized in that The area of the first-stage gas mixing disc is set to be the smallest, and the number of air outlet holes of the first-stage gas mixing disc is the least. The area of each subsequent stage of gas mixing disc is increased in sequence, and at the same time, the number of air outlet holes of each stage of gas mixing disc is increased.

8. The integrated gas mixing and heat monitoring system according to any one of claims 1-4, characterized in that Flow meters are provided on the intake pipes, and flow meters are provided on the outlet pipes; and / or pressure gauges and flow meters are provided on the intake and outlet pipes.

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