CN214622328U - Nitrogen oxide conversion device - Google Patents
Nitrogen oxide conversion device Download PDFInfo
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- CN214622328U CN214622328U CN202023153383.6U CN202023153383U CN214622328U CN 214622328 U CN214622328 U CN 214622328U CN 202023153383 U CN202023153383 U CN 202023153383U CN 214622328 U CN214622328 U CN 214622328U
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Abstract
The utility model discloses a nitrogen oxide conversion device, relate to exhaust-gas monitoring equipment technical field, molybdenum furnace fixed connection is in the casing, the molybdenum furnace intussuseption is filled with the molybdenum net, the fixed cover of heating device is located outside the molybdenum furnace, be equipped with first runner and second runner in the valve block, first pipeline one end and the sealed fixed connection of molybdenum furnace air inlet, the first pipeline other end and the sealed fixed connection of port of first runner one end, the port of the first runner other end is connected with the first air inlet of two three-way valves, the sealed fixed connection of second pipeline one end and molybdenum furnace gas outlet, the port of the second pipeline other end and the sealed fixed connection of port of second runner one end, the port of the second runner other end is connected with the second air inlet of two three-way valves, be equipped with the first runner of intercommunication on the valve block, still be equipped with the venthole of the valve gas outlet of the two three-way valves of intercommunication on the valve block. The utility model provides a nitrogen oxide conversion device improves conversion stability, reduces the maintenance cost to convenient operation improves detection efficiency.
Description
Technical Field
The utility model relates to an exhaust-gas monitoring equipment technical field especially relates to a nitrogen oxide conversion device.
Background
Nitrogen oxides are one of the main pollutants of air pollution and seriously harmful to human health, so that research works such as monitoring and treatment of nitrogen oxides are closely concerned by all circles of society in recent years. The nitrogen oxide analyzer is used for detecting the content of nitrogen oxide based on a chemiluminescence method detection technology, a reaction chamber is a core component in the whole system, and the chemiluminescence method detection technology is based on NO energy and O3The chemical luminous reaction takes place, the luminous intensity is in direct proportion to the concentration of NO, the NO concentration can be calculated by converting the light energy into an electric signal and outputting the electric signal through a photomultiplier, wherein NO and O are in the reaction chamber3A location where a chemiluminescent reaction occurs; and the sample gas (NO in the sample gas)xIncluding NO and NO2) In NO2The concentration determination comprises passing the sample gas through a molybdenum conversion chamber in a nitrogen oxide conversion device, and reacting NO in the sample gas at 380 deg.C2After the conversion to NO, the concentration of all NO is detected by a chemiluminescence method to obtain NOxThe concentration of NO is subtracted to obtain NO2The concentration of (c).
However, the existing nitrogen oxide conversion device has a certain disadvantage in use, sample gas enters a molybdenum conversion chamber (molybdenum furnace) through a gas path pipeline and a gas path joint, the molybdenum furnace is limited and installed through quartz wool extrusion, the gas inlet and outlet pipes are not firmly fixed in transportation and practical use due to the soft physical characteristics of the quartz wool, and gas leakage is easily generated at the gas path joint in the long-term use process, so that the conversion stability is reduced, and the maintenance is troublesome, while when the nitrogen oxide is measured, two pipelines and the gas path joint as well as a corresponding switch and a flow control device need to be arranged, one pipeline is connected with the molybdenum furnace through the gas path joint and is provided with the gas path switch and the flow control device, the other pipeline is connected with a reaction chamber of a nitrogen oxide analyzer through the gas path joint, and the corresponding gas path switch and the flow control device also need to be arranged, during detection operation, the arrangement of complex pipelines, switches and flow control devices makes the operation of personnel very difficult, and operation errors are easily caused, so that detection failure is caused, and the detection efficiency is very low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a nitrogen oxide conversion device to solve the problem that above-mentioned prior art exists, improve conversion stability, reduce the maintenance cost, and convenient operation improves detection efficiency.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a nitrogen oxide conversion device, which comprises a shell, a molybdenum furnace, a valve block, a two-position three-way valve, a heating device, a first pipeline and a second pipeline, wherein the molybdenum furnace is fixedly connected in the shell, the molybdenum furnace is filled with a molybdenum net, the molybdenum furnace is provided with a molybdenum furnace air inlet and a molybdenum furnace air outlet, the heating device is fixedly sleeved outside the molybdenum furnace, a first flow passage and a second flow passage are arranged in the valve block, one end of the first pipeline passes through the shell and is fixedly connected with the molybdenum furnace air inlet in a sealing way, the other end of the first pipeline is fixedly connected with the port at one end of the first flow passage in a sealing way, the port at the other end of the first flow passage is connected with the first air inlet of the two-position three-way valve, one end of the second pipeline passes through the shell and is fixedly connected with the molybdenum furnace air outlet in a sealing way, the other end of the second pipeline is fixedly connected with the port at one end of the second flow passage in a sealing way, the port at the other end of the second flow channel is connected with a second air inlet of the two-position three-way valve, the valve block is provided with an air inlet communicated with the first flow channel, and the valve block is also provided with an air outlet communicated with a valve air outlet of the two-position three-way valve.
Preferably, the molybdenum furnace comprises a molybdenum tube and end covers fixedly connected to two ends of the molybdenum tube in a sealing manner, the molybdenum net is filled in the molybdenum tube, annular bosses are arranged on the inner side surface of each end cover, the two bosses are respectively inserted into two ends of the molybdenum tube, and the two bosses are respectively in extrusion contact with two ends of the molybdenum net.
Preferably, the molybdenum furnace further comprises a thermocouple, the thermocouple is fixedly connected to the outer side wall of the shell, and a hot electrode of the thermocouple is arranged on the outer side wall of the molybdenum furnace.
Preferably, the first pipe and the second pipe are both U-shaped pipes.
Preferably, two ends of the first pipeline are respectively connected with the gas inlet of the molybdenum furnace and the port at one end of the first flow channel in a welding and sealing manner, and two ends of the second pipeline are respectively connected with the gas outlet of the molybdenum furnace and the port at one end of the second flow channel in a welding and sealing manner.
Preferably, the air inlet hole and the air outlet hole are both connected with a quick connector.
Preferably, the two-position three-way valve is a two-position three-way electromagnetic valve.
Preferably, the valve block is fixedly arranged on one side of the shell, and the two-position three-way valve is fixedly connected to the lower surface of the valve block.
Preferably, the shell is an aluminum alloy shell.
The utility model discloses for prior art gain following technological effect:
the utility model provides a nitrogen oxide conversion device, which is characterized in that a molybdenum furnace is fixedly connected with a shell and is fixedly connected with a valve block through a first pipeline and a second pipeline, thereby effectively avoiding the problem of loose and unstable pipeline connection caused by the infirm flexible extrusion of quartz wool in the shell of the molybdenum furnace in the traditional technology, avoiding gas leakage in the use process and realizing stable and reliable transportation, thereby improving the conversion stability and reducing the maintenance cost; through setting up valve block and two three-way valve, the pipeline sets up simply, when detection operation, only need to control the flow direction of appearance gas through two three-way valve, make appearance gas let in the molybdenum furnace and let in to nitrogen oxide analyzer's reacting chamber after converting, or directly let in to nitrogen oxide analyzer's reacting chamber, realize nitrogen oxide's survey, convenient operation is swift, and the detection efficiency is improved, it makes personnel's operation very difficult to have avoided traditional complicated pipeline setting, very easily arouse operation error, lead to detecting failure, the drawback that detection efficiency is very low.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic perspective view of a nitrogen oxide conversion device provided by the present invention;
FIG. 2 is a schematic perspective view of the NOx conversion device of FIG. 1 with the housing removed;
fig. 3 is a schematic view of a cross-sectional connection structure of a valve block in the nitrogen oxide conversion device provided by the present invention;
FIG. 4 is a sectional view of a molybdenum furnace in the NOx conversion apparatus according to the present invention;
fig. 5 is a schematic view of a three-dimensional structure of a two-position three-way solenoid valve in the nitrogen oxide conversion device provided by the present invention;
in the figure: 100-nitrogen oxide conversion device, 1-shell, 2-molybdenum furnace, 3-valve block, 4-two-position three-way valve, 5-heating device, 6-first pipeline, 7-second pipeline, 8-molybdenum net, 9-first flow channel, 10-second flow channel, 11-air inlet, 12-air outlet, 13-molybdenum pipe, 14-end cover, 15-boss, 16-thermocouple, 17-thermal electrode, 18-quick connector, 19-molybdenum furnace air inlet, 20-molybdenum furnace air outlet, 21-first air inlet, 22-second air inlet, 23-valve air outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a nitrogen oxide conversion device to solve the problem that prior art exists, improve conversion stability, reduce the maintenance cost, and convenient operation improves detection efficiency.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 5, the embodiment provides a nitrogen oxide conversion apparatus 100, which includes a casing 1, a molybdenum furnace 2, a valve block 3, a two-position three-way valve 4, a heating device 5, a first pipeline 6 and a second pipeline 7, wherein the molybdenum furnace 2 is fixedly connected in the casing 1, a molybdenum mesh 8 is filled in the molybdenum furnace 2, the molybdenum furnace 2 is provided with a molybdenum furnace air inlet 19 and a molybdenum furnace air outlet 20, the heating device 5 is fixedly sleeved outside the molybdenum furnace 2, a first flow passage 9 and a second flow passage 10 are arranged in the valve block 3, one end of the first pipeline 6 penetrates through the casing 1 and is fixedly connected with the molybdenum furnace air inlet 19 in a sealing manner, the other end of the first pipeline 6 is fixedly connected with a port at one end of the first flow passage 9 in a sealing manner, a port at the other end of the first flow passage 9 is connected with a first air inlet 21 of the two-position three-way valve 4, one end of the second pipeline 7 penetrates through the casing 1 and is fixedly connected with the molybdenum furnace air outlet 20 in a sealing manner, the other end of the second pipeline 7 is fixedly connected with a port at one end of the second flow passage 10 in a sealing manner, the port at the other end of the second flow channel 10 is connected with a second air inlet 22 of the two-position three-way valve 4, an air inlet 11 communicated with the first flow channel 9 is arranged on the valve block 3, and an air outlet 12 communicated with a valve air outlet 23 of the two-position three-way valve 4 is also arranged on the valve block 3.
The molybdenum furnace 2 is fixedly connected in the shell 1, the molybdenum furnace 2 and the shell 1 can be fixed through screws, and the molybdenum furnace 2 and the valve block 3 are fixedly connected through the first pipeline 6 and the second pipeline 7, so that the problem of loose and unstable pipeline connection caused by the fact that the molybdenum furnace is not firmly and flexibly extruded in the shell through quartz wool in the traditional technology is effectively solved, and meanwhile, the transportation is stable and reliable, so that the conversion stability is improved, and the maintenance cost is reduced; through setting up valve block 3 and two three-way valve 4, the pipeline sets up simply, when detection operation, only need to control the flow direction of appearance gas through two three-way valve 4, make appearance gas let in molybdenum furnace 2 in the reaction chamber that lets in nitrogen oxide analysis appearance after converting, or directly let in to nitrogen oxide analysis appearance's reaction chamber in, realize nitrogen oxide's survey, convenient operation is swift, improve detection efficiency, it is very difficult to have avoided traditional complicated pipeline setting to make personnel's operation, very easily arouse operation error, lead to detecting failure, the drawback that detection efficiency is very low.
As shown in fig. 2 and 4, in this embodiment, the molybdenum furnace 2 includes a molybdenum tube 13 and end caps 14 hermetically and fixedly connected to two ends of the molybdenum tube 13, the molybdenum mesh 8 is filled in the molybdenum tube 13, annular bosses 15 are disposed on inner side surfaces of the end caps 14, the two bosses 15 are respectively inserted into two ends of the molybdenum tube 13, and the two bosses 15 are respectively in pressing contact with two ends of the molybdenum mesh 8, so that gas can be prevented from directly flowing through a gap between the molybdenum mesh 8 and an inner wall of the molybdenum furnace 2, thereby increasing a contact area between the gas and the molybdenum mesh 8 and improving conversion efficiency of nitrogen oxides.
As shown in fig. 2, in the present embodiment, a thermocouple 16 is further included, the thermocouple 16 is fixedly connected to the outer side wall of the casing 1, a hot electrode 17 of the thermocouple 16 is arranged on the outer side wall of the molybdenum furnace 2, and the temperature of the molybdenum furnace 2 can be conveniently detected through the thermocouple 16, so that the heating device 5 is adjusted to ensure that the heating temperature of the molybdenum furnace 2 is within the reaction temperature range.
As shown in fig. 1 to 3, in this embodiment, the first pipeline 6 and the second pipeline 7 are both U-shaped pipelines, and since the reaction temperature of the molybdenum furnace 2 is as high as 380 ℃, the heated high-temperature gas can be effectively reduced by the arrangement of the U-shaped pipelines, so that the temperature of the gas entering the valve block 3 and the two-position three-way valve 4 is low, the valve block 3 and the two-position three-way valve 4 in the high-temperature use environment are not required to be specifically arranged, and the valve block 3 and the two-position three-way valve 4 at the common use temperature are selected, thereby reducing the cost, and meanwhile, the occupied space is reduced by the arrangement of the U-shaped pipelines.
As shown in fig. 2 and 4, in this embodiment, two ends of the first pipe 6 are respectively connected with the molybdenum furnace gas inlet 19 and the port at one end of the first flow channel 9 in a welding and sealing manner, and two ends of the second pipe 7 are respectively connected with the molybdenum furnace gas outlet 20 and the port at one end of the second flow channel 10 in a welding and sealing manner, so that the welding and sealing connection is more stable, and the defect that the gas leakage may be loosened due to the conventional connection between the pipe and the pipe joint is avoided.
As shown in FIGS. 1 to 3, in this embodiment, the air inlet 11 and the air outlet 12 are both connected with a quick connector 18, which is convenient for connecting with other external modules.
In this embodiment, the two-position three-way valve 4 is a two-position three-way electromagnetic valve, since the reaction temperature of the molybdenum furnace 2 is as high as 380 ℃ and the general environment temperature of the electromagnetic valve is-10 to 55 ℃, when the two-position three-way electromagnetic valve is used to control the sample gas introduced into the molybdenum furnace 2, the environment temperature of the two-position three-way electromagnetic valve is required to be ensured to meet the use temperature, when the molybdenum furnace 2 is heated to a high temperature of 380 ℃, the gas temperature can be effectively reduced by the design of the U-shaped pipeline connection between the valve block 3 and the molybdenum furnace 2, so that the gas flow temperatures on the valve block mounting surface fixed by the two-position three-way electromagnetic valve and the two gas inlets of the two-position three-way electromagnetic valve are both within the range of the environment temperature of the two-position three-way electromagnetic valve.
As shown in fig. 1, in this embodiment, the valve block 3 is fixedly disposed at one side of the housing 1, and the two-position three-way valve 4 is fixedly connected to the lower surface of the valve block 3, so as to reduce the occupied space.
In this embodiment, the housing 1 is an aluminum alloy housing, which is light in weight and high in strength.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. A nitrogen oxide conversion apparatus, characterized in that: the molybdenum furnace is fixedly connected in the shell, a molybdenum net is filled in the molybdenum furnace, a molybdenum furnace air inlet and a molybdenum furnace air outlet are arranged on the molybdenum furnace, the heating device is fixedly sleeved outside the molybdenum furnace, a first flow passage and a second flow passage are arranged in the valve block, one end of the first flow passage penetrates through the shell and is fixedly connected with the molybdenum furnace air inlet in a sealing manner, the other end of the first flow passage is fixedly connected with a port at one end of the first flow passage in a sealing manner, a port at the other end of the first flow passage is connected with a first air inlet of the two-position three-way valve, one end of the second flow passage penetrates through the shell and is fixedly connected with the molybdenum furnace air outlet in a sealing manner, the other end of the second flow passage is fixedly connected with a port at one end of the second flow passage in a sealing manner, and a port at the other end of the second flow passage is connected with a second air inlet of the two-position three-way valve, and the valve block is provided with an air inlet communicated with the first flow passage, and is also provided with an air outlet communicated with the valve air outlet of the two three-way valve.
2. The nitrogen oxide conversion apparatus according to claim 1, characterized in that: the molybdenum furnace comprises a molybdenum tube and end covers which are fixedly connected to the two ends of the molybdenum tube in a sealing mode, the molybdenum net is filled in the molybdenum tube, annular bosses are arranged on the inner side face of each end cover, the two bosses are respectively inserted into the two ends of the molybdenum tube, and the two bosses are respectively in extrusion contact with the two ends of the molybdenum net.
3. The nitrogen oxide conversion apparatus according to claim 1, characterized in that: the molybdenum furnace is characterized by further comprising a thermocouple, the thermocouple is fixedly connected to the outer side wall of the shell, and a hot electrode of the thermocouple is arranged on the outer side wall of the molybdenum furnace.
4. The nitrogen oxide conversion apparatus according to claim 1, characterized in that: the first pipeline and the second pipeline are both U-shaped pipelines.
5. The nitrogen oxide conversion apparatus according to claim 1, characterized in that: two ends of the first pipeline are respectively connected with the gas inlet of the molybdenum furnace and the port at one end of the first flow channel in a welding and sealing manner, and two ends of the second pipeline are respectively connected with the gas outlet of the molybdenum furnace and the port at one end of the second flow channel in a welding and sealing manner.
6. The nitrogen oxide conversion apparatus according to claim 1, characterized in that: the air inlet hole and the air outlet hole are both connected with a quick connector.
7. The nitrogen oxide conversion apparatus according to claim 1, characterized in that: the two-position three-way valve is a two-position three-way electromagnetic valve.
8. The nitrogen oxide conversion apparatus according to claim 1, characterized in that: the valve block is fixedly arranged on one side of the shell, and the two-position three-way valve is fixedly connected to the lower surface of the valve block.
9. The nitrogen oxide conversion apparatus according to claim 1, characterized in that: the shell is an aluminum alloy shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023153383.6U CN214622328U (en) | 2020-12-24 | 2020-12-24 | Nitrogen oxide conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023153383.6U CN214622328U (en) | 2020-12-24 | 2020-12-24 | Nitrogen oxide conversion device |
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| Publication Number | Publication Date |
|---|---|
| CN214622328U true CN214622328U (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023153383.6U Active CN214622328U (en) | 2020-12-24 | 2020-12-24 | Nitrogen oxide conversion device |
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|---|---|
| CN (1) | CN214622328U (en) |
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- 2020-12-24 CN CN202023153383.6U patent/CN214622328U/en active Active
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