Oxygen supply combustion-supporting device and sample combustion detection equipment

Abstract

The utility model discloses an oxygen supply combustion-supporting device and sample combustion detection equipment, and belongs to the technical field of oxygen supply devices. The oxygen supply combustion-supporting device comprises a first molecular sieve adsorption tower, a second molecular sieve adsorption tower, a switching valve group and a vacuum pump; the first molecular sieve adsorption tower and the second molecular sieve adsorption tower are connected with an air inlet and an air outlet of the vacuum pump through air pipes of the switching valve group to form a closed-loop connection air path, and the switching valve group is used for controlling the airflow direction in the air pipe at the air outlet end of the first molecular sieve adsorption tower; the airflow direction in the air pipe at the air outlet end of the second molecular sieve adsorption tower is controlled; the oxygen supply pipe is communicated with the air outlet switching valve of the vacuum pump at the same time, and the oxygen supply pipe is used for being externally connected with aerobic equipment. The device can solve the problems that no oxygen exists on the site and the test time needs to be shortened, and is very simple and efficient in overall structure, low in energy consumption and convenient and flexible to arrange.

Description

Technical Field

[0001] The present application relates to the technical field of oxygen supply devices, in particular, to an oxygen supply combustion-supporting device. In addition, the present application also relates to a sample combustion detection device including the above oxygen supply combustion-supporting device. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present application. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present application.

[0003] Some testing equipment requires the sample to be burned to complete the test. For example, when a sulfur analyzer is working, the sample in the crucible must be fully burned in a high-temperature environment. Complete combustion of the sample requires sufficient oxygen, so air or oxygen must be introduced into the crucible during combustion to allow the sample and oxygen to fully react and complete combustion. When introducing air, since the oxygen content in the air is around 20%, a large air flow rate and a long ventilation time are required, which will extend the test time. When introducing oxygen, an external oxygen cylinder is required for oxygen supply, which requires frequent replacement. In addition, since oxygen cylinders need to be stored safely, there are high requirements for the use scenario, including the high cost of oxygen supply, which may prevent some users from using oxygen-assisted combustion.

[0004] Related oxygen supply devices exist in the prior art, such as the Chinese patent publication CN212639959U, which discloses a pressure swing adsorption oxygen generator with a double-layer structure and a small footprint. However, these oxygen supply devices are complex, have many components, consume a lot of power, and require a large amount of space in the desired location, making them inflexible.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Utility Model Content

[0006] In view of at least one of the above technical problems, the present application provides an oxygen supply and combustion-supporting device and a sample combustion detection equipment, which can quickly and continuously realize oxygen supply operation through a vacuum pump, a switching valve and a molecular sieve adsorption tower, thereby solving the problem of no oxygen on site and speeding up the test time. The overall structure is very streamlined and efficient, with low energy consumption and convenient and flexible layout.

[0007] According to one aspect of the present application, there is provided an oxygen supply and combustion-supporting device, comprising:

[0008] The first gas outlet end of the first molecular sieve adsorption tower and the second gas outlet end of the second molecular sieve adsorption tower are arranged in parallel and are respectively connected to the gas inlet of the vacuum pump through a switching valve group, and the switching valve group is used to control the connection and disconnection between the first gas outlet end and the gas inlet, and control the connection and disconnection between the second gas outlet end and the gas inlet;

[0009] Oxygen supply pipe, the oxygen supply pipe is connected to the air outlet of the vacuum pump and is used to connect to external oxygen-demanding equipment.

[0010] The oxygen supply and combustion-supporting device also includes a purge valve group, and the air outlet of the vacuum pump is connected to the first air outlet end and the second air outlet end respectively through the purge valve group. The purge valve group is used to control the on-off between the air outlet and the first air outlet end, and the on-off between the air outlet and the second air outlet end.

[0011] In some embodiments of the present application, the oxygen supply and combustion-supporting device further includes a pressure sensor, which is connected to the air inlet of the vacuum pump through an air pipe, and the pressure sensor is used to detect the exhaust pressure of the vacuum pump.

[0012] In some embodiments of the present application, oxygen molecular sieves are installed in both the first molecular sieve adsorption tower and the second molecular sieve adsorption tower.

[0013] In some embodiments of the present application, the switching valve group is used to control the air flow from the outlet end of the first molecular sieve adsorption tower to flow to the air inlet, and at the same time control the air flow from the outlet end of the second molecular sieve adsorption tower to flow into the air outlet, or

[0014] The switching valve group is used to control the airflow discharged from the air outlet to flow into the air outlet end of the first molecular sieve adsorption tower, and at the same time control the airflow from the air outlet end of the second molecular sieve adsorption tower to flow to the air inlet.

[0015] In some embodiments of the present application, the switching valve group includes an FA1 valve, an FA2 valve, an FB1 valve and an FB2 valve, the FA1 valve is used to control the opening and closing of the airflow from the outlet end of the first molecular sieve adsorption tower to the air inlet, the FB2 valve is used to control the opening and closing of the airflow from the outlet end to the air outlet end of the first molecular sieve adsorption tower, the FA2 valve is used to control the opening and closing of the airflow from the outlet end to the air outlet end of the second molecular sieve adsorption tower, and the FB1 valve is used to control the opening and closing of the airflow from the outlet end to the air inlet of the second molecular sieve adsorption tower.

[0016] In some embodiments of the present application, a regulating valve is provided on the oxygen supply pipe.

[0017] In some embodiments of the present application, a flow meter is provided on the oxygen supply tube.

[0018] In some embodiments of the present application, air filters are provided at the air inlet ends of the first molecular sieve adsorption tower and the second molecular sieve adsorption tower.

[0019] In some embodiments of the present application, a drying and water removal device is provided at the air inlet end of the first molecular sieve adsorption tower and the second molecular sieve adsorption tower.

[0020] According to another aspect of the present application, a sample combustion detection device is also provided, which includes the above-mentioned oxygen supply and combustion-supporting device. The combustion detection device also includes a high-temperature combustion chamber, in which a crucible is arranged, and the air vent of the high-temperature combustion chamber is connected to the oxygen supply pipe.

[0021] This application has the following beneficial effects:

[0022] The oxygen supply and combustion-supporting device of the present application filters air through a first molecular sieve adsorption tower and a second molecular sieve adsorption tower. The first molecular sieve adsorption tower and the second molecular sieve adsorption tower are connected to a vacuum pump through a switching valve group. The air outlet of the vacuum pump is connected to the oxygen supply pipe. The gas with a high oxygen content filtered by the first molecular sieve adsorption tower or the second molecular sieve adsorption tower is extracted by the vacuum pump and then discharged from the air outlet to the oxygen supply pipe. The oxygen supply pipe is connected to an external oxygen-demanding device for oxygen supply. The oxygen supply device of the present application has a streamlined structure, few power-consuming components, and the various components can be flexibly arranged. The installation conditions are low and it has good universal adaptability.

[0023] The sample combustion detection equipment of this application also has the above-mentioned beneficial effects.

[0024] Of course, any product implementing this application does not necessarily need to achieve all of the advantages described above. In addition to the purposes, features, and advantages described above, this application also has other purposes, features, and advantages. The application will be further described in detail below with reference to the figures. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the present application;

[0027] Figure 2 This is a structural diagram of a switching valve group according to a preferred embodiment of the present application;

[0028] Legend: 1. First molecular sieve adsorption tower; 11. Gas outlet of first molecular sieve adsorption tower; 2. Second molecular sieve adsorption tower; 21. Gas outlet of second molecular sieve adsorption tower; 3. Switching valve group; 4. Pressure sensor; 5. Vacuum pump; 51. Air inlet; 52. Air outlet; 6. Oxygen supply pipe; 7. Regulating valve; 8. Flow meter; 9. High-temperature combustion chamber; 10. Crucible. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below with reference to the accompanying drawings, but the present application can be implemented in a variety of different ways defined and covered below.

[0030] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the present application; Figure 2 It is a structural schematic diagram of the switching valve group of the preferred embodiment of the present application.

[0031] An oxygen supply and combustion-supporting device, comprising:

[0032] The first gas outlet end 11 of the first molecular sieve adsorption tower 1 and the second gas outlet end 21 of the second molecular sieve adsorption tower 2 are arranged in parallel and are respectively connected to the gas inlet 51 of the vacuum pump 5 through the switching valve group 3. The switching valve group 3 is used to control the connection and disconnection between the first gas outlet end 11 and the gas inlet 51, and to control the connection and disconnection between the second gas outlet end 21 and the gas inlet 51;

[0033] The oxygen supply pipe 6 is connected to the air outlet 52 of the vacuum pump 5 and is used to connect to an external oxygen-demanding device.

[0034] The oxygen supply and combustion-supporting device of the present application filters the air through the first molecular sieve adsorption tower 1 and the second molecular sieve adsorption tower 2. The first molecular sieve adsorption tower 1 and the second molecular sieve adsorption tower 2 are connected to the vacuum pump 5 through the switching valve group 3. The air outlet 52 of the vacuum pump 5 is connected to the oxygen supply pipe 6. The gas with high oxygen content filtered by the first molecular sieve adsorption tower 1 or the second molecular sieve adsorption tower 2 is extracted by the vacuum pump 5 and then discharged from the air outlet 52 to the oxygen supply pipe 6. The oxygen supply pipe 6 is connected to an external oxygen-demanding device for oxygen supply. The oxygen supply device of the present application has a simple structure, few power-consuming components, and the various components can be flexibly arranged. The installation conditions are low and it has good universal adaptability.

[0035] It should be noted that most common oxygen supply systems currently available on the market for home or laboratory use air compressors, which are large in size and take up a lot of installation space. However, this application uses a vacuum pump suction structure, which can make the overall structure of the device smaller and easier to install.

[0036] Preferably, the oxygen supply and combustion-supporting device also includes a purge valve group, and the air outlet 52 of the vacuum pump 5 is also connected to the first air outlet end 11 and the second air outlet end 21 respectively through the purge valve group. The purge valve group is used to control the on-off between the air outlet 52 and the first air outlet end 11, and to control the on-off between the air outlet 52 and the second air outlet end 21.

[0037] Preferably, please refer to Figure 1 and Figure 2 As shown, the oxygen supply and combustion-supporting device further includes a pressure sensor 4 , which is connected to the air inlet 51 of the vacuum pump 5 through an air pipe. The pressure sensor 4 is used to detect the exhaust pressure of the vacuum pump 5 .

[0038] It can be understood that the pressure sensor 4 can be used to detect the pressure of the air pipe connected to the air inlet 51 of the vacuum pump 5, that is, to detect the exhaust pressure of the vacuum pump 5. When the exhaust pressure reaches a preset value, it indicates that the first molecular sieve adsorption tower 1 or the second molecular sieve adsorption tower 2 is saturated, and the switching valve group 3 can be switched to control the working status of the first molecular sieve adsorption tower 1 and the second molecular sieve adsorption tower 2 to ensure that the first molecular sieve adsorption tower 1 and the second molecular sieve adsorption tower 2 continue to have good filtering functions and achieve continuous oxygen supply with high oxygen content.

[0039] It should be noted that when the first molecular sieve adsorption tower 1 or the second molecular sieve adsorption tower 2 is performing air filtration, as time goes by, the molecular sieve of the first molecular sieve adsorption tower 1 or the second molecular sieve adsorption tower 2 will slowly become blocked when absorbing nitrogen. When the vacuum pressure reaches a certain value, it means that the first molecular sieve adsorption tower 1 or the second molecular sieve adsorption tower 2 is saturated. At this time, it is necessary to switch the switching valve group 3 to change the working state of the first molecular sieve adsorption tower 1 and the second molecular sieve adsorption tower 2, so as to realize the first molecular sieve adsorption tower 1 or the second molecular sieve adsorption tower 2 to perform filtration work alternately.

[0040] Preferably, both the first molecular sieve adsorption tower 1 and the second molecular sieve adsorption tower 2 are equipped with oxygen molecular sieves.

[0041] It can be understood that the oxygen molecular sieve can be used to adsorb nitrogen in the air, allowing only oxygen to pass through the oxygen molecular sieve, and then the vacuum pump 5 extracts the filtered gas, so that the oxygen concentration of the gas at the outlet 52 reaches more than 90%, thereby discharging gas with a high oxygen content to meet the oxygen supply demand.

[0042] Preferably, please refer to Figure 1 and Figure 2 As shown, the switching valve group 3 is used to control the air flow from the outlet end 11 of the first molecular sieve adsorption tower to flow to the air inlet 51, and at the same time control the air flow from the outlet end 21 of the second molecular sieve adsorption tower to flow into the air outlet 52, or

[0043] The switching valve group 3 is used to control the airflow discharged from the air outlet 52 to flow into the air outlet end 11 of the first molecular sieve adsorption tower, and at the same time control the airflow from the air outlet end 21 of the second molecular sieve adsorption tower to flow toward the air inlet 51.

[0044] It can be understood that the working states of the first molecular sieve adsorption tower 1 and the second molecular sieve adsorption tower 2 can be controlled by switching the valve group 3, so that when the first molecular sieve adsorption tower 1 is performing air filtration, a portion of the gas discharged by the vacuum pump 5 can flow into the second molecular sieve adsorption tower 2, and the second molecular sieve adsorption tower 2 is reversely purged to blow out the nitrogen adsorbed by the second molecular sieve adsorption tower 2. After the purge, the second molecular sieve adsorption tower 2 can be used again and obtain a better filtering effect. In this way, the first molecular sieve adsorption tower 1 and the second molecular sieve adsorption tower 2 are alternately used to perform filtering work, and each molecular sieve adsorption tower can be fully purged to discharge the adsorbed nitrogen, thereby ensuring the filtering capacity of each molecular sieve adsorption tower, and can also effectively improve the service life of each molecular sieve adsorption tower, reduce the replacement frequency of parts, and reduce the overall cost of use.

[0045] Preferably, please refer to Figure 2 As shown, the switching valve group 3 includes an FA1 valve, an FA2 valve, an FB1 valve and an FB2 valve. The FA1 valve is used to control the opening and closing of the airflow from the outlet end 11 of the first molecular sieve adsorption tower to the air inlet 51, the FB2 valve is used to control the opening and closing of the airflow from the outlet 52 to the outlet end 11 of the first molecular sieve adsorption tower, the FA2 valve is used to control the opening and closing of the airflow from the outlet 52 to the outlet end 21 of the second molecular sieve adsorption tower, and the FB1 valve is used to control the opening and closing of the airflow from the outlet end 21 of the second molecular sieve adsorption tower to the air inlet 51.

[0046] It can be understood that when the FA1 valve and the FA2 valve are opened and the FB1 valve and the FB2 valve are closed, the vacuum pump 5 extracts the gas filtered by the first molecular sieve adsorption tower 1, and the gas outlet 52 of the vacuum pump 5 discharges the extracted high-oxygen-content gas through the oxygen supply pipe 6, while a part of the gas not discharged from the oxygen supply pipe 6 enters the second molecular sieve adsorption tower 2 through the FA2 valve for reverse purge; when the FB1 valve and the FB2 valve are opened and the FA1 valve and the FA2 valve are closed, the working states of the first molecular sieve adsorption tower 1 and the second molecular sieve adsorption tower 2 are swapped, so that the second molecular sieve adsorption tower 2 performs air filtering, and the first molecular sieve adsorption tower 1 performs reverse purge, and the alternating operation is repeated in this way, which can continuously provide gas with high oxygen content to meet the oxygen supply demand, and at the same time, the service life of the oxygen molecular sieve in each molecular sieve adsorption tower can be effectively extended.

[0047] Preferably, please refer to Figure 1 As shown, a regulating valve 7 is provided on the oxygen supply pipe 6.

[0048] It can be understood that the regulating valve 7 can control the gas flow rate of the oxygen supply pipe 6 to adjust the oxygen supply rate, and can easily open and close the oxygen supply pipe 6, thereby improving the convenience of use of the oxygen supply device.

[0049] Preferably, please refer to Figure 1As shown, a flow meter 8 is provided on the oxygen supply pipe 6.

[0050] It is understandable that the flow meter 8 can monitor the gas flow of the oxygen supply pipe 6, facilitate statistical summary of the flow, and can also serve as an auxiliary reference for monitoring the service life of each molecular sieve adsorption tower.

[0051] Preferably, please refer to Figure 1 As shown, air filters are provided at the air inlet ends of the first molecular sieve adsorption tower 1 and the second molecular sieve adsorption tower 2 .

[0052] It is understandable that the air filter can perform preliminary filtration of dust and impurities in the air to prevent impurities from entering the molecular sieve adsorption towers and causing blockage, affecting the filtering effect of the molecular sieve adsorption towers and reducing the service life of the molecular sieve adsorption towers.

[0053] Preferably, please refer to Figure 1 As shown, the air inlet ends of the first molecular sieve adsorption tower 1 and the second molecular sieve adsorption tower 2 are provided with drying and water removal devices.

[0054] It is understandable that the air entering each molecular sieve adsorption tower is dried by the drying and dehydration device to prevent moisture from entering the molecular sieve adsorption tower and affecting the filtering function, which is beneficial to ensure the working performance of the molecular sieve adsorption tower and extend its service life.

[0055] Among them, the drying and dehydration device can adopt common drying and dehydration devices on the market such as electric heating tubes to reduce the overall production and procurement costs.

[0056] According to another aspect of the present application, a sample combustion detection device is also provided, which includes the above-mentioned oxygen supply and combustion-supporting device. The combustion detection device also includes a high-temperature combustion chamber 9, in which a crucible 10 is arranged, and the air vent of the high-temperature combustion chamber 9 is connected to the oxygen supply pipe 6.

[0057] The sample combustion detection equipment of this application also has the above-mentioned beneficial effects, including effectively solving the problem of no oxygen on site and needing to speed up the test progress. It does not require the provision of dedicated oxygen supply equipment, ensures that the test sample burns more completely and the combustion time is shorter, and effectively shortens the test time.

[0058] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0059] This article uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only used to help understand the method and core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of this application, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection of this application.

Claims

1. An oxygen supply and combustion-supporting device, characterized in that: include: The first gas outlet end (11) of the first molecular sieve adsorption tower (1) and the second gas outlet end (21) of the second molecular sieve adsorption tower (2) are arranged in parallel and are respectively connected to the gas inlet (51) of the vacuum pump (5) through a switching valve group (3). The switching valve group (3) is used to control the connection and disconnection between the first gas outlet end (11) and the gas inlet (51), and to control the connection and disconnection between the second gas outlet end (21) and the gas inlet (51); The oxygen supply pipe (6) is connected to the air outlet (52) of the vacuum pump (5) and is used for connecting to an external oxygen-demanding device.

2. The oxygen supply and combustion-supporting device according to claim 1, characterized in that: The oxygen supply and combustion-supporting device further comprises a purge valve group, wherein the air outlet (52) of the vacuum pump (5) is further connected to the first air outlet end (11) and the second air outlet end (21) respectively through the purge valve group, and the purge valve group is used to control the connection and disconnection between the air outlet (52) and the first air outlet end (11), and to control the connection and disconnection between the air outlet (52) and the second air outlet end (21).

3. The oxygen supply and combustion-supporting device according to claim 1, characterized in that: The oxygen supply and combustion-supporting device further comprises a pressure sensor (4), which is connected to the air inlet (51) of the vacuum pump (5) via an air pipe. The pressure sensor (4) is used to detect the exhaust pressure of the vacuum pump (5).

4. The oxygen supply and combustion-supporting device according to claim 1, characterized in that: Oxygen molecular sieves are installed in both the first molecular sieve adsorption tower (1) and the second molecular sieve adsorption tower (2).

5. The oxygen supply and combustion-supporting device according to claim 1, characterized in that: The switching valve group (3) is used to control the air flow from the outlet end (11) of the first molecular sieve adsorption tower to flow to the air inlet (51), and at the same time control the air flow from the outlet end (21) of the second molecular sieve adsorption tower to flow into the outlet (52), or The switching valve group (3) is used to control the airflow discharged from the air outlet (52) to flow into the air outlet end (11) of the first molecular sieve adsorption tower, and simultaneously control the airflow from the air outlet end (21) of the second molecular sieve adsorption tower to flow toward the air inlet (51).

6. The oxygen supply and combustion-supporting device according to claim 4, characterized in that: The switching valve group (3) comprises an FA1 valve, an FA2 valve, an FB1 valve and an FB2 valve, wherein the FA1 valve is used to control the opening and closing of the airflow from the air outlet end (11) of the first molecular sieve adsorption tower to the air inlet (51), the FB2 valve is used to control the opening and closing of the airflow from the air outlet (52) to the air outlet end (11) of the first molecular sieve adsorption tower, the FA2 valve is used to control the opening and closing of the airflow from the air outlet (52) to the air outlet end (21) of the second molecular sieve adsorption tower, and the FB1 valve is used to control the opening and closing of the airflow from the air outlet end (21) of the second molecular sieve adsorption tower to the air inlet (51).

7. The oxygen supply and combustion-supporting device according to claim 1, characterized in that: The oxygen supply pipe (6) is provided with a regulating valve (7) and a flow meter (8).

8. The oxygen supply and combustion-supporting device according to claim 1, characterized in that: Air filters are provided at the air inlet ends of the first molecular sieve adsorption tower (1) and the second molecular sieve adsorption tower (2).

9. The oxygen supply and combustion-supporting device according to claim 1, characterized in that: The air inlet ends of the first molecular sieve adsorption tower (1) and the second molecular sieve adsorption tower (2) are provided with drying and water removal devices.

10. A sample combustion detection device, characterized in that: The combustion detection device comprises the oxygen supply and combustion-supporting device as described in any one of claims 1 to 9, and further comprises a high-temperature combustion chamber (9), a crucible (10) is provided in the high-temperature combustion chamber (9), and the vent of the high-temperature combustion chamber (9) is connected to the oxygen supply pipe (6).

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